diff options
Diffstat (limited to 'binutils-2.25/bfd/elf64-ppc.c')
| -rw-r--r-- | binutils-2.25/bfd/elf64-ppc.c | 14428 |
1 files changed, 14428 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf64-ppc.c b/binutils-2.25/bfd/elf64-ppc.c new file mode 100644 index 00000000..3df01f64 --- /dev/null +++ b/binutils-2.25/bfd/elf64-ppc.c @@ -0,0 +1,14428 @@ +/* PowerPC64-specific support for 64-bit ELF. + Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, + 2009, 2010, 2011, 2012 Free Software Foundation, Inc. + Written by Linus Nordberg, Swox AB <info@swox.com>, + based on elf32-ppc.c by Ian Lance Taylor. + Largely rewritten by Alan Modra. + + This file is part of BFD, the Binary File Descriptor library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ + + +/* The 64-bit PowerPC ELF ABI may be found at + http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and + http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ + +#include "sysdep.h" +#include <stdarg.h> +#include "bfd.h" +#include "bfdlink.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/ppc64.h" +#include "elf64-ppc.h" +#include "dwarf2.h" + +static bfd_reloc_status_type ppc64_elf_ha_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_branch_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_brtaken_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_sectoff_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_toc_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_toc_ha_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_toc64_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_unhandled_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_vma opd_entry_value + (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean); + +#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec +#define TARGET_LITTLE_NAME "elf64-powerpcle" +#define TARGET_BIG_SYM bfd_elf64_powerpc_vec +#define TARGET_BIG_NAME "elf64-powerpc" +#define ELF_ARCH bfd_arch_powerpc +#define ELF_TARGET_ID PPC64_ELF_DATA +#define ELF_MACHINE_CODE EM_PPC64 +#define ELF_MAXPAGESIZE 0x10000 +#define ELF_COMMONPAGESIZE 0x1000 +#define elf_info_to_howto ppc64_elf_info_to_howto + +#define elf_backend_want_got_sym 0 +#define elf_backend_want_plt_sym 0 +#define elf_backend_plt_alignment 3 +#define elf_backend_plt_not_loaded 1 +#define elf_backend_got_header_size 8 +#define elf_backend_can_gc_sections 1 +#define elf_backend_can_refcount 1 +#define elf_backend_rela_normal 1 +#define elf_backend_default_execstack 0 + +#define bfd_elf64_mkobject ppc64_elf_mkobject +#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup +#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup +#define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match +#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook +#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create +#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free +#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab +#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms + +#define elf_backend_object_p ppc64_elf_object_p +#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus +#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo +#define elf_backend_write_core_note ppc64_elf_write_core_note +#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections +#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol +#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook +#define elf_backend_check_directives ppc64_elf_process_dot_syms +#define elf_backend_notice_as_needed ppc64_elf_notice_as_needed +#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup +#define elf_backend_check_relocs ppc64_elf_check_relocs +#define elf_backend_gc_keep ppc64_elf_gc_keep +#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref +#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook +#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol +#define elf_backend_hide_symbol ppc64_elf_hide_symbol +#define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym +#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust +#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections +#define elf_backend_init_index_section _bfd_elf_init_2_index_sections +#define elf_backend_action_discarded ppc64_elf_action_discarded +#define elf_backend_relocate_section ppc64_elf_relocate_section +#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol +#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class +#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections +#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook +#define elf_backend_special_sections ppc64_elf_special_sections +#define elf_backend_post_process_headers _bfd_elf_set_osabi + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" + +/* The size in bytes of an entry in the procedure linkage table. */ +#define PLT_ENTRY_SIZE 24 + +/* The initial size of the plt reserved for the dynamic linker. */ +#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE + +/* TOC base pointers offset from start of TOC. */ +#define TOC_BASE_OFF 0x8000 + +/* Offset of tp and dtp pointers from start of TLS block. */ +#define TP_OFFSET 0x7000 +#define DTP_OFFSET 0x8000 + +/* .plt call stub instructions. The normal stub is like this, but + sometimes the .plt entry crosses a 64k boundary and we need to + insert an addi to adjust r12. */ +#define PLT_CALL_STUB_SIZE (7*4) +#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ +#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ +#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ +#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ +#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ + /* ld %r11,xxx+16@l(%r12) */ +#define BCTR 0x4e800420 /* bctr */ + + +#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */ +#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */ +#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ +#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ + +#define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */ +#define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */ +#define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */ +#define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */ +#define BNECTR 0x4ca20420 /* bnectr+ */ +#define BNECTR_P4 0x4ce20420 /* bnectr+ */ + +#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */ +#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */ + +#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ + +/* glink call stub instructions. We enter with the index in R0. */ +#define GLINK_CALL_STUB_SIZE (16*4) + /* 0: */ + /* .quad plt0-1f */ + /* __glink: */ +#define MFLR_R12 0x7d8802a6 /* mflr %12 */ +#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ + /* 1: */ +#define MFLR_R11 0x7d6802a6 /* mflr %11 */ +#define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */ +#define MTLR_R12 0x7d8803a6 /* mtlr %12 */ +#define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */ + /* ld %11,0(%12) */ + /* ld %2,8(%12) */ + /* mtctr %11 */ + /* ld %11,16(%12) */ + /* bctr */ + +/* Pad with this. */ +#define NOP 0x60000000 + +/* Some other nops. */ +#define CROR_151515 0x4def7b82 +#define CROR_313131 0x4ffffb82 + +/* .glink entries for the first 32k functions are two instructions. */ +#define LI_R0_0 0x38000000 /* li %r0,0 */ +#define B_DOT 0x48000000 /* b . */ + +/* After that, we need two instructions to load the index, followed by + a branch. */ +#define LIS_R0_0 0x3c000000 /* lis %r0,0 */ +#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ + +/* Instructions used by the save and restore reg functions. */ +#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */ +#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */ +#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */ +#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */ +#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ +#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ +#define LI_R12_0 0x39800000 /* li %r12,0 */ +#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */ +#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */ +#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ +#define BLR 0x4e800020 /* blr */ + +/* Since .opd is an array of descriptors and each entry will end up + with identical R_PPC64_RELATIVE relocs, there is really no need to + propagate .opd relocs; The dynamic linker should be taught to + relocate .opd without reloc entries. */ +#ifndef NO_OPD_RELOCS +#define NO_OPD_RELOCS 0 +#endif + +#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) + +/* Relocation HOWTO's. */ +static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; + +static reloc_howto_type ppc64_elf_howto_raw[] = { + /* This reloc does nothing. */ + HOWTO (R_PPC64_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A standard 32 bit relocation. */ + HOWTO (R_PPC64_ADDR32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 26 bit branch; the lower two bits must be zero. + FIXME: we don't check that, we just clear them. */ + HOWTO (R_PPC64_ADDR24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR24", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x03fffffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A standard 16 bit relocation. */ + HOWTO (R_PPC64_ADDR16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit relocation without overflow. */ + HOWTO (R_PPC64_ADDR16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Bits 16-31 of an address. */ + HOWTO (R_PPC64_ADDR16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Bits 16-31 of an address, plus 1 if the contents of the low 16 + bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 16 bit branch; the lower two bits must be zero. + FIXME: we don't check that, we just clear them. */ + HOWTO (R_PPC64_ADDR14, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_branch_reloc, /* special_function */ + "R_PPC64_ADDR14", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 16 bit branch, for which bit 10 should be set to + indicate that the branch is expected to be taken. The lower two + bits must be zero. */ + HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_ADDR14_BRTAKEN",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 16 bit branch, for which bit 10 should be set to + indicate that the branch is not expected to be taken. The lower + two bits must be zero. */ + HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_ADDR14_BRNTAKEN",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A relative 26 bit branch; the lower two bits must be zero. */ + HOWTO (R_PPC64_REL24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_branch_reloc, /* special_function */ + "R_PPC64_REL24", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x03fffffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 16 bit branch; the lower two bits must be zero. */ + HOWTO (R_PPC64_REL14, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_branch_reloc, /* special_function */ + "R_PPC64_REL14", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 16 bit branch. Bit 10 should be set to indicate that + the branch is expected to be taken. The lower two bits must be + zero. */ + HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_REL14_BRTAKEN", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 16 bit branch. Bit 10 should be set to indicate that + the branch is not expected to be taken. The lower two bits must + be zero. */ + HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_REL14_BRNTAKEN",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the + symbol. */ + HOWTO (R_PPC64_GOT16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* This is used only by the dynamic linker. The symbol should exist + both in the object being run and in some shared library. The + dynamic linker copies the data addressed by the symbol from the + shared library into the object, because the object being + run has to have the data at some particular address. */ + HOWTO (R_PPC64_COPY, /* type */ + 0, /* rightshift */ + 0, /* this one is variable size */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_COPY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR64, but used when setting global offset table + entries. */ + HOWTO (R_PPC64_GLOB_DAT, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GLOB_DAT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Created by the link editor. Marks a procedure linkage table + entry for a symbol. */ + HOWTO (R_PPC64_JMP_SLOT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_JMP_SLOT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Used only by the dynamic linker. When the object is run, this + doubleword64 is set to the load address of the object, plus the + addend. */ + HOWTO (R_PPC64_RELATIVE, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_RELATIVE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR32, but may be unaligned. */ + HOWTO (R_PPC64_UADDR32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but may be unaligned. */ + HOWTO (R_PPC64_UADDR16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 32-bit PC relative. */ + HOWTO (R_PPC64_REL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + /* FIXME: Verify. Was complain_overflow_bitfield. */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 32-bit relocation to the symbol's procedure linkage table. */ + HOWTO (R_PPC64_PLT32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 32-bit PC relative relocation to the symbol's procedure linkage table. + FIXME: R_PPC64_PLTREL32 not supported. */ + HOWTO (R_PPC64_PLTREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTREL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit section relative relocation. */ + HOWTO (R_PPC64_SECTOFF, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF, but no overflow warning. */ + HOWTO (R_PPC64_SECTOFF_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit upper half section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit upper half adjusted section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_ha_reloc, /* special_function */ + "R_PPC64_SECTOFF_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_REL24 without touching the two least significant bits. */ + HOWTO (R_PPC64_REL30, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 30, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL30", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffffffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ + + /* A standard 64-bit relocation. */ + HOWTO (R_PPC64_ADDR64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 32-47 of an address. */ + HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHER", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 32-47 of an address, plus 1 if the contents of the low + 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHERA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 48-63 of an address. */ + HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHEST", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 48-63 of an address, plus 1 if the contents of the low + 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHESTA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like ADDR64, but may be unaligned. */ + HOWTO (R_PPC64_UADDR64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 64-bit relative relocation. */ + HOWTO (R_PPC64_REL64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 64-bit relocation to the symbol's procedure linkage table. */ + HOWTO (R_PPC64_PLT64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 64-bit PC relative relocation to the symbol's procedure linkage + table. */ + /* FIXME: R_PPC64_PLTREL64 not supported. */ + HOWTO (R_PPC64_PLTREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTREL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation. */ + + /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ + HOWTO (R_PPC64_TOC16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation without overflow. */ + + /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation, high 16 bits. */ + + /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the + contents of the low 16 bits, treated as a signed number, is + negative. */ + + /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_ha_reloc, /* special_function */ + "R_PPC64_TOC16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 64-bit relocation; insert value of TOC base (.TOC.). */ + + /* R_PPC64_TOC 51 doubleword64 .TOC. */ + HOWTO (R_PPC64_TOC, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_toc64_reloc, /* special_function */ + "R_PPC64_TOC", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_GOT16, but also informs the link editor that the + value to relocate may (!) refer to a PLT entry which the link + editor (a) may replace with the symbol value. If the link editor + is unable to fully resolve the symbol, it may (b) create a PLT + entry and store the address to the new PLT entry in the GOT. + This permits lazy resolution of function symbols at run time. + The link editor may also skip all of this and just (c) emit a + R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ + /* FIXME: R_PPC64_PLTGOT16 not implemented. */ + HOWTO (R_PPC64_PLTGOT16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16, but without overflow. */ + /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ + HOWTO (R_PPC64_PLTGOT16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ + /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ + HOWTO (R_PPC64_PLTGOT16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus + 1 if the contents of the low 16 bits, treated as a signed number, + is negative. */ + /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ + HOWTO (R_PPC64_PLTGOT16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ + HOWTO (R_PPC64_ADDR16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_LO_DS",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_GOT16, but for instructions with a DS field. */ + HOWTO (R_PPC64_GOT16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_GOT16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_PLT16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ + HOWTO (R_PPC64_SECTOFF_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_LO_DS",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_TOC16, but for instructions with a DS field. */ + HOWTO (R_PPC64_TOC16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_TOC16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ + /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ + HOWTO (R_PPC64_PLTGOT16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ + /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ + HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_LO_DS",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Marker relocs for TLS. */ + HOWTO (R_PPC64_TLS, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TLS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_PPC64_TLSGD, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TLSGD", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_PPC64_TLSLD, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TLSLD", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_PPC64_TOCSAVE, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TOCSAVE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Computes the load module index of the load module that contains the + definition of its TLS sym. */ + HOWTO (R_PPC64_DTPMOD64, + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPMOD64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Computes a dtv-relative displacement, the difference between the value + of sym+add and the base address of the thread-local storage block that + contains the definition of sym, minus 0x8000. */ + HOWTO (R_PPC64_DTPREL64, + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit dtprel reloc. */ + HOWTO (R_PPC64_DTPREL16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16, but no overflow. */ + HOWTO (R_PPC64_DTPREL16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HI, but next higher group of 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHER, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHER", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHERA, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHERA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHEST, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHEST", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHESTA, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHESTA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16, but for insns with a DS field. */ + HOWTO (R_PPC64_DTPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_DTPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Computes a tp-relative displacement, the difference between the value of + sym+add and the value of the thread pointer (r13). */ + HOWTO (R_PPC64_TPREL64, + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit tprel reloc. */ + HOWTO (R_PPC64_TPREL16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16, but no overflow. */ + HOWTO (R_PPC64_TPREL16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_TPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_TPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HI, but next higher group of 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHER, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHER", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHERA, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHERA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHEST, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHEST", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHESTA, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHESTA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16, but for insns with a DS field. */ + HOWTO (R_PPC64_TPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_TPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates two contiguous entries in the GOT to hold a tls_index structure, + with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset + to the first entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_TLSGD16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSGD16, but no overflow. */ + HOWTO (R_PPC64_GOT_TLSGD16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_TLSGD16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_TLSGD16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates two contiguous entries in the GOT to hold a tls_index structure, + with values (sym+add)@dtpmod and zero, and computes the offset to the + first entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_TLSLD16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSLD16, but no overflow. */ + HOWTO (R_PPC64_GOT_TLSLD16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_TLSLD16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_TLSLD16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes + the offset to the entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_DTPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_DTPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_GOT_DTPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_DTPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_DTPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the + offset to the entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_TPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_GOT_TPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_TPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_TPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_PPC64_JMP_IREL, /* type */ + 0, /* rightshift */ + 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_JMP_IREL", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_PPC64_IRELATIVE, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_IRELATIVE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit relative relocation. */ + HOWTO (R_PPC64_REL16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A 16 bit relative relocation without overflow. */ + HOWTO (R_PPC64_REL16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* The high order 16 bits of a relative address. */ + HOWTO (R_PPC64_REL16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* The high order 16 bits of a relative address, plus 1 if the contents of + the low 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_REL16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_REL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC64_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_PPC64_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC64_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + + +/* Initialize the ppc64_elf_howto_table, so that linear accesses can + be done. */ + +static void +ppc_howto_init (void) +{ + unsigned int i, type; + + for (i = 0; + i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); + i++) + { + type = ppc64_elf_howto_raw[i].type; + BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) + / sizeof (ppc64_elf_howto_table[0]))); + ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; + } +} + +static reloc_howto_type * +ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + enum elf_ppc64_reloc_type r = R_PPC64_NONE; + + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + ppc_howto_init (); + + switch (code) + { + default: + return NULL; + + case BFD_RELOC_NONE: r = R_PPC64_NONE; + break; + case BFD_RELOC_32: r = R_PPC64_ADDR32; + break; + case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; + break; + case BFD_RELOC_16: r = R_PPC64_ADDR16; + break; + case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; + break; + case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; + break; + case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; + break; + case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; + break; + case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; + break; + case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; + break; + case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; + break; + case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; + break; + case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; + break; + case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; + break; + case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; + break; + case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; + break; + case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; + break; + case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; + break; + case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; + break; + case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; + break; + case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; + break; + case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; + break; + case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; + break; + case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; + break; + case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; + break; + case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; + break; + case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; + break; + case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; + break; + case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; + break; + case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; + break; + case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; + break; + case BFD_RELOC_64: r = R_PPC64_ADDR64; + break; + case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; + break; + case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; + break; + case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; + break; + case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; + break; + case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; + break; + case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; + break; + case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; + break; + case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; + break; + case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; + break; + case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; + break; + case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; + break; + case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; + break; + case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; + break; + case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; + break; + case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; + break; + case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; + break; + case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; + break; + case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; + break; + case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; + break; + case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; + break; + case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; + break; + case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; + break; + case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; + break; + case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD; + break; + case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD; + break; + case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; + break; + case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; + break; + case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; + break; + case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; + break; + case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; + break; + case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; + break; + case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; + break; + case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; + break; + case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; + break; + case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; + break; + case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; + break; + case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; + break; + case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; + break; + case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; + break; + case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; + break; + case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; + break; + case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; + break; + case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; + break; + case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; + break; + case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; + break; + case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; + break; + case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; + break; + case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; + break; + case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; + break; + case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; + break; + case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; + break; + case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; + break; + case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; + break; + case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; + break; + case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; + break; + case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; + break; + case BFD_RELOC_16_PCREL: r = R_PPC64_REL16; + break; + case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO; + break; + case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI; + break; + case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA; + break; + case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; + break; + case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; + break; + } + + return ppc64_elf_howto_table[r]; +}; + +static reloc_howto_type * +ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); + i++) + if (ppc64_elf_howto_raw[i].name != NULL + && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0) + return &ppc64_elf_howto_raw[i]; + + return NULL; +} + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + unsigned int type; + + /* Initialize howto table if needed. */ + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + ppc_howto_init (); + + type = ELF64_R_TYPE (dst->r_info); + if (type >= (sizeof (ppc64_elf_howto_table) + / sizeof (ppc64_elf_howto_table[0]))) + { + (*_bfd_error_handler) (_("%B: invalid relocation type %d"), + abfd, (int) type); + type = R_PPC64_NONE; + } + cache_ptr->howto = ppc64_elf_howto_table[type]; +} + +/* Handle the R_PPC64_ADDR16_HA and similar relocs. */ + +static bfd_reloc_status_type +ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* Adjust the addend for sign extension of the low 16 bits. + We won't actually be using the low 16 bits, so trashing them + doesn't matter. */ + reloc_entry->addend += 0x8000; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + if (strcmp (symbol->section->name, ".opd") == 0 + && (symbol->section->owner->flags & DYNAMIC) == 0) + { + bfd_vma dest = opd_entry_value (symbol->section, + symbol->value + reloc_entry->addend, + NULL, NULL, FALSE); + if (dest != (bfd_vma) -1) + reloc_entry->addend = dest - (symbol->value + + symbol->section->output_section->vma + + symbol->section->output_offset); + } + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + long insn; + enum elf_ppc64_reloc_type r_type; + bfd_size_type octets; + /* Assume 'at' branch hints. */ + bfd_boolean is_isa_v2 = TRUE; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + octets = reloc_entry->address * bfd_octets_per_byte (abfd); + insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); + insn &= ~(0x01 << 21); + r_type = reloc_entry->howto->type; + if (r_type == R_PPC64_ADDR14_BRTAKEN + || r_type == R_PPC64_REL14_BRTAKEN) + insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ + + if (is_isa_v2) + { + /* Set 'a' bit. This is 0b00010 in BO field for branch + on CR(BI) insns (BO == 001at or 011at), and 0b01000 + for branch on CTR insns (BO == 1a00t or 1a01t). */ + if ((insn & (0x14 << 21)) == (0x04 << 21)) + insn |= 0x02 << 21; + else if ((insn & (0x14 << 21)) == (0x10 << 21)) + insn |= 0x08 << 21; + else + goto out; + } + else + { + bfd_vma target = 0; + bfd_vma from; + + if (!bfd_is_com_section (symbol->section)) + target = symbol->value; + target += symbol->section->output_section->vma; + target += symbol->section->output_offset; + target += reloc_entry->addend; + + from = (reloc_entry->address + + input_section->output_offset + + input_section->output_section->vma); + + /* Invert 'y' bit if not the default. */ + if ((bfd_signed_vma) (target - from) < 0) + insn ^= 0x01 << 21; + } + bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); + out: + return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); +} + +static bfd_reloc_status_type +ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* Subtract the symbol section base address. */ + reloc_entry->addend -= symbol->section->output_section->vma; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* Subtract the symbol section base address. */ + reloc_entry->addend -= symbol->section->output_section->vma; + + /* Adjust the addend for sign extension of the low 16 bits. */ + reloc_entry->addend += 0x8000; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + bfd_vma TOCstart; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + TOCstart = _bfd_get_gp_value (input_section->output_section->owner); + if (TOCstart == 0) + TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); + + /* Subtract the TOC base address. */ + reloc_entry->addend -= TOCstart + TOC_BASE_OFF; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + bfd_vma TOCstart; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + TOCstart = _bfd_get_gp_value (input_section->output_section->owner); + if (TOCstart == 0) + TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); + + /* Subtract the TOC base address. */ + reloc_entry->addend -= TOCstart + TOC_BASE_OFF; + + /* Adjust the addend for sign extension of the low 16 bits. */ + reloc_entry->addend += 0x8000; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + bfd_vma TOCstart; + bfd_size_type octets; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + TOCstart = _bfd_get_gp_value (input_section->output_section->owner); + if (TOCstart == 0) + TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); + + octets = reloc_entry->address * bfd_octets_per_byte (abfd); + bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); + return bfd_reloc_ok; +} + +static bfd_reloc_status_type +ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + if (error_message != NULL) + { + static char buf[60]; + sprintf (buf, "generic linker can't handle %s", + reloc_entry->howto->name); + *error_message = buf; + } + return bfd_reloc_dangerous; +} + +/* Track GOT entries needed for a given symbol. We might need more + than one got entry per symbol. */ +struct got_entry +{ + struct got_entry *next; + + /* The symbol addend that we'll be placing in the GOT. */ + bfd_vma addend; + + /* Unlike other ELF targets, we use separate GOT entries for the same + symbol referenced from different input files. This is to support + automatic multiple TOC/GOT sections, where the TOC base can vary + from one input file to another. After partitioning into TOC groups + we merge entries within the group. + + Point to the BFD owning this GOT entry. */ + bfd *owner; + + /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, + TLS_TPREL or TLS_DTPREL for tls entries. */ + unsigned char tls_type; + + /* Non-zero if got.ent points to real entry. */ + unsigned char is_indirect; + + /* Reference count until size_dynamic_sections, GOT offset thereafter. */ + union + { + bfd_signed_vma refcount; + bfd_vma offset; + struct got_entry *ent; + } got; +}; + +/* The same for PLT. */ +struct plt_entry +{ + struct plt_entry *next; + + bfd_vma addend; + + union + { + bfd_signed_vma refcount; + bfd_vma offset; + } plt; +}; + +struct ppc64_elf_obj_tdata +{ + struct elf_obj_tdata elf; + + /* Shortcuts to dynamic linker sections. */ + asection *got; + asection *relgot; + + /* Used during garbage collection. We attach global symbols defined + on removed .opd entries to this section so that the sym is removed. */ + asection *deleted_section; + + /* TLS local dynamic got entry handling. Support for multiple GOT + sections means we potentially need one of these for each input bfd. */ + struct got_entry tlsld_got; + + union { + /* A copy of relocs before they are modified for --emit-relocs. */ + Elf_Internal_Rela *relocs; + + /* Section contents. */ + bfd_byte *contents; + } opd; + + /* Nonzero if this bfd has small toc/got relocs, ie. that expect + the reloc to be in the range -32768 to 32767. */ + unsigned int has_small_toc_reloc : 1; + + /* Set if toc/got ha relocs detected not using r2, or lo reloc + instruction not one we handle. */ + unsigned int unexpected_toc_insn : 1; +}; + +#define ppc64_elf_tdata(bfd) \ + ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) + +#define ppc64_tlsld_got(bfd) \ + (&ppc64_elf_tdata (bfd)->tlsld_got) + +#define is_ppc64_elf(bfd) \ + (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ + && elf_object_id (bfd) == PPC64_ELF_DATA) + +/* Override the generic function because we store some extras. */ + +static bfd_boolean +ppc64_elf_mkobject (bfd *abfd) +{ + return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata), + PPC64_ELF_DATA); +} + +/* Fix bad default arch selected for a 64 bit input bfd when the + default is 32 bit. */ + +static bfd_boolean +ppc64_elf_object_p (bfd *abfd) +{ + if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32) + { + Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); + + if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) + { + /* Relies on arch after 32 bit default being 64 bit default. */ + abfd->arch_info = abfd->arch_info->next; + BFD_ASSERT (abfd->arch_info->bits_per_word == 64); + } + } + return TRUE; +} + +/* Support for core dump NOTE sections. */ + +static bfd_boolean +ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) +{ + size_t offset, size; + + if (note->descsz != 504) + return FALSE; + + /* pr_cursig */ + elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); + + /* pr_pid */ + elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); + + /* pr_reg */ + offset = 112; + size = 384; + + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", + size, note->descpos + offset); +} + +static bfd_boolean +ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) +{ + if (note->descsz != 136) + return FALSE; + + elf_tdata (abfd)->core->pid + = bfd_get_32 (abfd, note->descdata + 24); + elf_tdata (abfd)->core->program + = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); + elf_tdata (abfd)->core->command + = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); + + return TRUE; +} + +static char * +ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, + ...) +{ + switch (note_type) + { + default: + return NULL; + + case NT_PRPSINFO: + { + char data[136]; + va_list ap; + + va_start (ap, note_type); + memset (data, 0, sizeof (data)); + strncpy (data + 40, va_arg (ap, const char *), 16); + strncpy (data + 56, va_arg (ap, const char *), 80); + va_end (ap); + return elfcore_write_note (abfd, buf, bufsiz, + "CORE", note_type, data, sizeof (data)); + } + + case NT_PRSTATUS: + { + char data[504]; + va_list ap; + long pid; + int cursig; + const void *greg; + + va_start (ap, note_type); + memset (data, 0, 112); + pid = va_arg (ap, long); + bfd_put_32 (abfd, pid, data + 32); + cursig = va_arg (ap, int); + bfd_put_16 (abfd, cursig, data + 12); + greg = va_arg (ap, const void *); + memcpy (data + 112, greg, 384); + memset (data + 496, 0, 8); + va_end (ap); + return elfcore_write_note (abfd, buf, bufsiz, + "CORE", note_type, data, sizeof (data)); + } + } +} + +/* Add extra PPC sections. */ + +static const struct bfd_elf_special_section ppc64_elf_special_sections[]= +{ + { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 }, + { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, + { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, + { NULL, 0, 0, 0, 0 } +}; + +enum _ppc64_sec_type { + sec_normal = 0, + sec_opd = 1, + sec_toc = 2 +}; + +struct _ppc64_elf_section_data +{ + struct bfd_elf_section_data elf; + + union + { + /* An array with one entry for each opd function descriptor. */ + struct _opd_sec_data + { + /* Points to the function code section for local opd entries. */ + asection **func_sec; + + /* After editing .opd, adjust references to opd local syms. */ + long *adjust; + } opd; + + /* An array for toc sections, indexed by offset/8. */ + struct _toc_sec_data + { + /* Specifies the relocation symbol index used at a given toc offset. */ + unsigned *symndx; + + /* And the relocation addend. */ + bfd_vma *add; + } toc; + } u; + + enum _ppc64_sec_type sec_type:2; + + /* Flag set when small branches are detected. Used to + select suitable defaults for the stub group size. */ + unsigned int has_14bit_branch:1; +}; + +#define ppc64_elf_section_data(sec) \ + ((struct _ppc64_elf_section_data *) elf_section_data (sec)) + +static bfd_boolean +ppc64_elf_new_section_hook (bfd *abfd, asection *sec) +{ + if (!sec->used_by_bfd) + { + struct _ppc64_elf_section_data *sdata; + bfd_size_type amt = sizeof (*sdata); + + sdata = bfd_zalloc (abfd, amt); + if (sdata == NULL) + return FALSE; + sec->used_by_bfd = sdata; + } + + return _bfd_elf_new_section_hook (abfd, sec); +} + +static struct _opd_sec_data * +get_opd_info (asection * sec) +{ + if (sec != NULL + && ppc64_elf_section_data (sec) != NULL + && ppc64_elf_section_data (sec)->sec_type == sec_opd) + return &ppc64_elf_section_data (sec)->u.opd; + return NULL; +} + +/* Parameters for the qsort hook. */ +static bfd_boolean synthetic_relocatable; + +/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */ + +static int +compare_symbols (const void *ap, const void *bp) +{ + const asymbol *a = * (const asymbol **) ap; + const asymbol *b = * (const asymbol **) bp; + + /* Section symbols first. */ + if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM)) + return -1; + if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM)) + return 1; + + /* then .opd symbols. */ + if (strcmp (a->section->name, ".opd") == 0 + && strcmp (b->section->name, ".opd") != 0) + return -1; + if (strcmp (a->section->name, ".opd") != 0 + && strcmp (b->section->name, ".opd") == 0) + return 1; + + /* then other code symbols. */ + if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) + == (SEC_CODE | SEC_ALLOC) + && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) + != (SEC_CODE | SEC_ALLOC)) + return -1; + + if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) + != (SEC_CODE | SEC_ALLOC) + && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) + == (SEC_CODE | SEC_ALLOC)) + return 1; + + if (synthetic_relocatable) + { + if (a->section->id < b->section->id) + return -1; + + if (a->section->id > b->section->id) + return 1; + } + + if (a->value + a->section->vma < b->value + b->section->vma) + return -1; + + if (a->value + a->section->vma > b->value + b->section->vma) + return 1; + + /* For syms with the same value, prefer strong dynamic global function + syms over other syms. */ + if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0) + return -1; + + if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0) + return 1; + + if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0) + return -1; + + if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0) + return 1; + + if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0) + return -1; + + if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0) + return 1; + + if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0) + return -1; + + if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0) + return 1; + + return 0; +} + +/* Search SYMS for a symbol of the given VALUE. */ + +static asymbol * +sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value) +{ + long mid; + + if (id == -1) + { + while (lo < hi) + { + mid = (lo + hi) >> 1; + if (syms[mid]->value + syms[mid]->section->vma < value) + lo = mid + 1; + else if (syms[mid]->value + syms[mid]->section->vma > value) + hi = mid; + else + return syms[mid]; + } + } + else + { + while (lo < hi) + { + mid = (lo + hi) >> 1; + if (syms[mid]->section->id < id) + lo = mid + 1; + else if (syms[mid]->section->id > id) + hi = mid; + else if (syms[mid]->value < value) + lo = mid + 1; + else if (syms[mid]->value > value) + hi = mid; + else + return syms[mid]; + } + } + return NULL; +} + +static bfd_boolean +section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) +{ + bfd_vma vma = *(bfd_vma *) ptr; + return ((section->flags & SEC_ALLOC) != 0 + && section->vma <= vma + && vma < section->vma + section->size); +} + +/* Create synthetic symbols, effectively restoring "dot-symbol" function + entry syms. Also generate @plt symbols for the glink branch table. */ + +static long +ppc64_elf_get_synthetic_symtab (bfd *abfd, + long static_count, asymbol **static_syms, + long dyn_count, asymbol **dyn_syms, + asymbol **ret) +{ + asymbol *s; + long i; + long count; + char *names; + long symcount, codesecsym, codesecsymend, secsymend, opdsymend; + asection *opd; + bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; + asymbol **syms; + + *ret = NULL; + + opd = bfd_get_section_by_name (abfd, ".opd"); + if (opd == NULL) + return 0; + + symcount = static_count; + if (!relocatable) + symcount += dyn_count; + if (symcount == 0) + return 0; + + syms = bfd_malloc ((symcount + 1) * sizeof (*syms)); + if (syms == NULL) + return -1; + + if (!relocatable && static_count != 0 && dyn_count != 0) + { + /* Use both symbol tables. */ + memcpy (syms, static_syms, static_count * sizeof (*syms)); + memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms)); + } + else if (!relocatable && static_count == 0) + memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms)); + else + memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms)); + + synthetic_relocatable = relocatable; + qsort (syms, symcount, sizeof (*syms), compare_symbols); + + if (!relocatable && symcount > 1) + { + long j; + /* Trim duplicate syms, since we may have merged the normal and + dynamic symbols. Actually, we only care about syms that have + different values, so trim any with the same value. */ + for (i = 1, j = 1; i < symcount; ++i) + if (syms[i - 1]->value + syms[i - 1]->section->vma + != syms[i]->value + syms[i]->section->vma) + syms[j++] = syms[i]; + symcount = j; + } + + i = 0; + if (strcmp (syms[i]->section->name, ".opd") == 0) + ++i; + codesecsym = i; + + for (; i < symcount; ++i) + if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) + != (SEC_CODE | SEC_ALLOC)) + || (syms[i]->flags & BSF_SECTION_SYM) == 0) + break; + codesecsymend = i; + + for (; i < symcount; ++i) + if ((syms[i]->flags & BSF_SECTION_SYM) == 0) + break; + secsymend = i; + + for (; i < symcount; ++i) + if (strcmp (syms[i]->section->name, ".opd") != 0) + break; + opdsymend = i; + + for (; i < symcount; ++i) + if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) + != (SEC_CODE | SEC_ALLOC)) + break; + symcount = i; + + count = 0; + + if (relocatable) + { + bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); + arelent *r; + size_t size; + long relcount; + + if (opdsymend == secsymend) + goto done; + + slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; + relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0; + if (relcount == 0) + goto done; + + if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE)) + { + count = -1; + goto done; + } + + size = 0; + for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) + { + asymbol *sym; + + while (r < opd->relocation + relcount + && r->address < syms[i]->value + opd->vma) + ++r; + + if (r == opd->relocation + relcount) + break; + + if (r->address != syms[i]->value + opd->vma) + continue; + + if (r->howto->type != R_PPC64_ADDR64) + continue; + + sym = *r->sym_ptr_ptr; + if (!sym_exists_at (syms, opdsymend, symcount, + sym->section->id, sym->value + r->addend)) + { + ++count; + size += sizeof (asymbol); + size += strlen (syms[i]->name) + 2; + } + } + + s = *ret = bfd_malloc (size); + if (s == NULL) + { + count = -1; + goto done; + } + + names = (char *) (s + count); + + for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) + { + asymbol *sym; + + while (r < opd->relocation + relcount + && r->address < syms[i]->value + opd->vma) + ++r; + + if (r == opd->relocation + relcount) + break; + + if (r->address != syms[i]->value + opd->vma) + continue; + + if (r->howto->type != R_PPC64_ADDR64) + continue; + + sym = *r->sym_ptr_ptr; + if (!sym_exists_at (syms, opdsymend, symcount, + sym->section->id, sym->value + r->addend)) + { + size_t len; + + *s = *syms[i]; + s->flags |= BSF_SYNTHETIC; + s->section = sym->section; + s->value = sym->value + r->addend; + s->name = names; + *names++ = '.'; + len = strlen (syms[i]->name); + memcpy (names, syms[i]->name, len + 1); + names += len + 1; + /* Have udata.p point back to the original symbol this + synthetic symbol was derived from. */ + s->udata.p = syms[i]; + s++; + } + } + } + else + { + bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); + bfd_byte *contents; + size_t size; + long plt_count = 0; + bfd_vma glink_vma = 0, resolv_vma = 0; + asection *dynamic, *glink = NULL, *relplt = NULL; + arelent *p; + + if (!bfd_malloc_and_get_section (abfd, opd, &contents)) + { + if (contents) + { + free_contents_and_exit: + free (contents); + } + count = -1; + goto done; + } + + size = 0; + for (i = secsymend; i < opdsymend; ++i) + { + bfd_vma ent; + + /* Ignore bogus symbols. */ + if (syms[i]->value > opd->size - 8) + continue; + + ent = bfd_get_64 (abfd, contents + syms[i]->value); + if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) + { + ++count; + size += sizeof (asymbol); + size += strlen (syms[i]->name) + 2; + } + } + + /* Get start of .glink stubs from DT_PPC64_GLINK. */ + if (dyn_count != 0 + && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL) + { + bfd_byte *dynbuf, *extdyn, *extdynend; + size_t extdynsize; + void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); + + if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) + goto free_contents_and_exit; + + extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; + swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; + + extdyn = dynbuf; + extdynend = extdyn + dynamic->size; + for (; extdyn < extdynend; extdyn += extdynsize) + { + Elf_Internal_Dyn dyn; + (*swap_dyn_in) (abfd, extdyn, &dyn); + + if (dyn.d_tag == DT_NULL) + break; + + if (dyn.d_tag == DT_PPC64_GLINK) + { + /* The first glink stub starts at offset 32; see comment in + ppc64_elf_finish_dynamic_sections. */ + glink_vma = dyn.d_un.d_val + 32; + /* The .glink section usually does not survive the final + link; search for the section (usually .text) where the + glink stubs now reside. */ + glink = bfd_sections_find_if (abfd, section_covers_vma, + &glink_vma); + break; + } + } + + free (dynbuf); + } + + if (glink != NULL) + { + /* Determine __glink trampoline by reading the relative branch + from the first glink stub. */ + bfd_byte buf[4]; + if (bfd_get_section_contents (abfd, glink, buf, + glink_vma + 4 - glink->vma, 4)) + { + unsigned int insn = bfd_get_32 (abfd, buf); + insn ^= B_DOT; + if ((insn & ~0x3fffffc) == 0) + resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000; + } + + if (resolv_vma) + size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); + + relplt = bfd_get_section_by_name (abfd, ".rela.plt"); + if (relplt != NULL) + { + slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; + if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE)) + goto free_contents_and_exit; + + plt_count = relplt->size / sizeof (Elf64_External_Rela); + size += plt_count * sizeof (asymbol); + + p = relplt->relocation; + for (i = 0; i < plt_count; i++, p++) + { + size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); + if (p->addend != 0) + size += sizeof ("+0x") - 1 + 16; + } + } + } + + s = *ret = bfd_malloc (size); + if (s == NULL) + goto free_contents_and_exit; + + names = (char *) (s + count + plt_count + (resolv_vma != 0)); + + for (i = secsymend; i < opdsymend; ++i) + { + bfd_vma ent; + + if (syms[i]->value > opd->size - 8) + continue; + + ent = bfd_get_64 (abfd, contents + syms[i]->value); + if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) + { + long lo, hi; + size_t len; + asection *sec = abfd->sections; + + *s = *syms[i]; + lo = codesecsym; + hi = codesecsymend; + while (lo < hi) + { + long mid = (lo + hi) >> 1; + if (syms[mid]->section->vma < ent) + lo = mid + 1; + else if (syms[mid]->section->vma > ent) + hi = mid; + else + { + sec = syms[mid]->section; + break; + } + } + + if (lo >= hi && lo > codesecsym) + sec = syms[lo - 1]->section; + + for (; sec != NULL; sec = sec->next) + { + if (sec->vma > ent) + break; + /* SEC_LOAD may not be set if SEC is from a separate debug + info file. */ + if ((sec->flags & SEC_ALLOC) == 0) + break; + if ((sec->flags & SEC_CODE) != 0) + s->section = sec; + } + s->flags |= BSF_SYNTHETIC; + s->value = ent - s->section->vma; + s->name = names; + *names++ = '.'; + len = strlen (syms[i]->name); + memcpy (names, syms[i]->name, len + 1); + names += len + 1; + /* Have udata.p point back to the original symbol this + synthetic symbol was derived from. */ + s->udata.p = syms[i]; + s++; + } + } + free (contents); + + if (glink != NULL && relplt != NULL) + { + if (resolv_vma) + { + /* Add a symbol for the main glink trampoline. */ + memset (s, 0, sizeof *s); + s->the_bfd = abfd; + s->flags = BSF_GLOBAL | BSF_SYNTHETIC; + s->section = glink; + s->value = resolv_vma - glink->vma; + s->name = names; + memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); + names += sizeof ("__glink_PLTresolve"); + s++; + count++; + } + + /* FIXME: It would be very much nicer to put sym@plt on the + stub rather than on the glink branch table entry. The + objdump disassembler would then use a sensible symbol + name on plt calls. The difficulty in doing so is + a) finding the stubs, and, + b) matching stubs against plt entries, and, + c) there can be multiple stubs for a given plt entry. + + Solving (a) could be done by code scanning, but older + ppc64 binaries used different stubs to current code. + (b) is the tricky one since you need to known the toc + pointer for at least one function that uses a pic stub to + be able to calculate the plt address referenced. + (c) means gdb would need to set multiple breakpoints (or + find the glink branch itself) when setting breakpoints + for pending shared library loads. */ + p = relplt->relocation; + for (i = 0; i < plt_count; i++, p++) + { + size_t len; + + *s = **p->sym_ptr_ptr; + /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since + we are defining a symbol, ensure one of them is set. */ + if ((s->flags & BSF_LOCAL) == 0) + s->flags |= BSF_GLOBAL; + s->flags |= BSF_SYNTHETIC; + s->section = glink; + s->value = glink_vma - glink->vma; + s->name = names; + s->udata.p = NULL; + len = strlen ((*p->sym_ptr_ptr)->name); + memcpy (names, (*p->sym_ptr_ptr)->name, len); + names += len; + if (p->addend != 0) + { + memcpy (names, "+0x", sizeof ("+0x") - 1); + names += sizeof ("+0x") - 1; + bfd_sprintf_vma (abfd, names, p->addend); + names += strlen (names); + } + memcpy (names, "@plt", sizeof ("@plt")); + names += sizeof ("@plt"); + s++; + glink_vma += 8; + if (i >= 0x8000) + glink_vma += 4; + } + count += plt_count; + } + } + + done: + free (syms); + return count; +} + +/* The following functions are specific to the ELF linker, while + functions above are used generally. Those named ppc64_elf_* are + called by the main ELF linker code. They appear in this file more + or less in the order in which they are called. eg. + ppc64_elf_check_relocs is called early in the link process, + ppc64_elf_finish_dynamic_sections is one of the last functions + called. + + PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that + functions have both a function code symbol and a function descriptor + symbol. A call to foo in a relocatable object file looks like: + + . .text + . x: + . bl .foo + . nop + + The function definition in another object file might be: + + . .section .opd + . foo: .quad .foo + . .quad .TOC.@tocbase + . .quad 0 + . + . .text + . .foo: blr + + When the linker resolves the call during a static link, the branch + unsurprisingly just goes to .foo and the .opd information is unused. + If the function definition is in a shared library, things are a little + different: The call goes via a plt call stub, the opd information gets + copied to the plt, and the linker patches the nop. + + . x: + . bl .foo_stub + . ld 2,40(1) + . + . + . .foo_stub: + . addis 12,2,Lfoo@toc@ha # in practice, the call stub + . addi 12,12,Lfoo@toc@l # is slightly optimized, but + . std 2,40(1) # this is the general idea + . ld 11,0(12) + . ld 2,8(12) + . mtctr 11 + . ld 11,16(12) + . bctr + . + . .section .plt + . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) + + The "reloc ()" notation is supposed to indicate that the linker emits + an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd + copying. + + What are the difficulties here? Well, firstly, the relocations + examined by the linker in check_relocs are against the function code + sym .foo, while the dynamic relocation in the plt is emitted against + the function descriptor symbol, foo. Somewhere along the line, we need + to carefully copy dynamic link information from one symbol to the other. + Secondly, the generic part of the elf linker will make .foo a dynamic + symbol as is normal for most other backends. We need foo dynamic + instead, at least for an application final link. However, when + creating a shared library containing foo, we need to have both symbols + dynamic so that references to .foo are satisfied during the early + stages of linking. Otherwise the linker might decide to pull in a + definition from some other object, eg. a static library. + + Update: As of August 2004, we support a new convention. Function + calls may use the function descriptor symbol, ie. "bl foo". This + behaves exactly as "bl .foo". */ + +/* Of those relocs that might be copied as dynamic relocs, this function + selects those that must be copied when linking a shared library, + even when the symbol is local. */ + +static int +must_be_dyn_reloc (struct bfd_link_info *info, + enum elf_ppc64_reloc_type r_type) +{ + switch (r_type) + { + default: + return 1; + + case R_PPC64_REL32: + case R_PPC64_REL64: + case R_PPC64_REL30: + return 0; + + case R_PPC64_TPREL16: + case R_PPC64_TPREL16_LO: + case R_PPC64_TPREL16_HI: + case R_PPC64_TPREL16_HA: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + case R_PPC64_TPREL64: + return !info->executable; + } +} + +/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid + copying dynamic variables from a shared lib into an app's dynbss + section, and instead use a dynamic relocation to point into the + shared lib. With code that gcc generates, it's vital that this be + enabled; In the PowerPC64 ABI, the address of a function is actually + the address of a function descriptor, which resides in the .opd + section. gcc uses the descriptor directly rather than going via the + GOT as some other ABI's do, which means that initialized function + pointers must reference the descriptor. Thus, a function pointer + initialized to the address of a function in a shared library will + either require a copy reloc, or a dynamic reloc. Using a copy reloc + redefines the function descriptor symbol to point to the copy. This + presents a problem as a plt entry for that function is also + initialized from the function descriptor symbol and the copy reloc + may not be initialized first. */ +#define ELIMINATE_COPY_RELOCS 1 + +/* Section name for stubs is the associated section name plus this + string. */ +#define STUB_SUFFIX ".stub" + +/* Linker stubs. + ppc_stub_long_branch: + Used when a 14 bit branch (or even a 24 bit branch) can't reach its + destination, but a 24 bit branch in a stub section will reach. + . b dest + + ppc_stub_plt_branch: + Similar to the above, but a 24 bit branch in the stub section won't + reach its destination. + . addis %r12,%r2,xxx@toc@ha + . ld %r11,xxx@toc@l(%r12) + . mtctr %r11 + . bctr + + ppc_stub_plt_call: + Used to call a function in a shared library. If it so happens that + the plt entry referenced crosses a 64k boundary, then an extra + "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr". + . addis %r12,%r2,xxx@toc@ha + . std %r2,40(%r1) + . ld %r11,xxx+0@toc@l(%r12) + . mtctr %r11 + . ld %r2,xxx+8@toc@l(%r12) + . ld %r11,xxx+16@toc@l(%r12) + . bctr + + ppc_stub_long_branch and ppc_stub_plt_branch may also have additional + code to adjust the value and save r2 to support multiple toc sections. + A ppc_stub_long_branch with an r2 offset looks like: + . std %r2,40(%r1) + . addis %r2,%r2,off@ha + . addi %r2,%r2,off@l + . b dest + + A ppc_stub_plt_branch with an r2 offset looks like: + . std %r2,40(%r1) + . addis %r12,%r2,xxx@toc@ha + . ld %r11,xxx@toc@l(%r12) + . addis %r2,%r2,off@ha + . addi %r2,%r2,off@l + . mtctr %r11 + . bctr + + In cases where the "addis" instruction would add zero, the "addis" is + omitted and following instructions modified slightly in some cases. +*/ + +enum ppc_stub_type { + ppc_stub_none, + ppc_stub_long_branch, + ppc_stub_long_branch_r2off, + ppc_stub_plt_branch, + ppc_stub_plt_branch_r2off, + ppc_stub_plt_call, + ppc_stub_plt_call_r2save +}; + +struct ppc_stub_hash_entry { + + /* Base hash table entry structure. */ + struct bfd_hash_entry root; + + enum ppc_stub_type stub_type; + + /* The stub section. */ + asection *stub_sec; + + /* Offset within stub_sec of the beginning of this stub. */ + bfd_vma stub_offset; + + /* Given the symbol's value and its section we can determine its final + value when building the stubs (so the stub knows where to jump. */ + bfd_vma target_value; + asection *target_section; + + /* The symbol table entry, if any, that this was derived from. */ + struct ppc_link_hash_entry *h; + struct plt_entry *plt_ent; + + /* Where this stub is being called from, or, in the case of combined + stub sections, the first input section in the group. */ + asection *id_sec; +}; + +struct ppc_branch_hash_entry { + + /* Base hash table entry structure. */ + struct bfd_hash_entry root; + + /* Offset within branch lookup table. */ + unsigned int offset; + + /* Generation marker. */ + unsigned int iter; +}; + +/* Used to track dynamic relocations for local symbols. */ +struct ppc_dyn_relocs +{ + struct ppc_dyn_relocs *next; + + /* The input section of the reloc. */ + asection *sec; + + /* Total number of relocs copied for the input section. */ + unsigned int count : 31; + + /* Whether this entry is for STT_GNU_IFUNC symbols. */ + unsigned int ifunc : 1; +}; + +struct ppc_link_hash_entry +{ + struct elf_link_hash_entry elf; + + union { + /* A pointer to the most recently used stub hash entry against this + symbol. */ + struct ppc_stub_hash_entry *stub_cache; + + /* A pointer to the next symbol starting with a '.' */ + struct ppc_link_hash_entry *next_dot_sym; + } u; + + /* Track dynamic relocs copied for this symbol. */ + struct elf_dyn_relocs *dyn_relocs; + + /* Link between function code and descriptor symbols. */ + struct ppc_link_hash_entry *oh; + + /* Flag function code and descriptor symbols. */ + unsigned int is_func:1; + unsigned int is_func_descriptor:1; + unsigned int fake:1; + + /* Whether global opd/toc sym has been adjusted or not. + After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag + should be set for all globals defined in any opd/toc section. */ + unsigned int adjust_done:1; + + /* Set if we twiddled this symbol to weak at some stage. */ + unsigned int was_undefined:1; + + /* Contexts in which symbol is used in the GOT (or TOC). + TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the + corresponding relocs are encountered during check_relocs. + tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to + indicate the corresponding GOT entry type is not needed. + tls_optimize may also set TLS_TPRELGD when a GD reloc turns into + a TPREL one. We use a separate flag rather than setting TPREL + just for convenience in distinguishing the two cases. */ +#define TLS_GD 1 /* GD reloc. */ +#define TLS_LD 2 /* LD reloc. */ +#define TLS_TPREL 4 /* TPREL reloc, => IE. */ +#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ +#define TLS_TLS 16 /* Any TLS reloc. */ +#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */ +#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ +#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */ + unsigned char tls_mask; +}; + +/* ppc64 ELF linker hash table. */ + +struct ppc_link_hash_table +{ + struct elf_link_hash_table elf; + + /* The stub hash table. */ + struct bfd_hash_table stub_hash_table; + + /* Another hash table for plt_branch stubs. */ + struct bfd_hash_table branch_hash_table; + + /* Hash table for function prologue tocsave. */ + htab_t tocsave_htab; + + /* Linker stub bfd. */ + bfd *stub_bfd; + + /* Linker call-backs. */ + asection * (*add_stub_section) (const char *, asection *); + void (*layout_sections_again) (void); + + /* Array to keep track of which stub sections have been created, and + information on stub grouping. */ + struct map_stub { + /* This is the section to which stubs in the group will be attached. */ + asection *link_sec; + /* The stub section. */ + asection *stub_sec; + /* Along with elf_gp, specifies the TOC pointer used in this group. */ + bfd_vma toc_off; + } *stub_group; + + /* Temp used when calculating TOC pointers. */ + bfd_vma toc_curr; + bfd *toc_bfd; + asection *toc_first_sec; + + /* Highest input section id. */ + int top_id; + + /* Highest output section index. */ + int top_index; + + /* Used when adding symbols. */ + struct ppc_link_hash_entry *dot_syms; + + /* List of input sections for each output section. */ + asection **input_list; + + /* Short-cuts to get to dynamic linker sections. */ + asection *got; + asection *plt; + asection *relplt; + asection *iplt; + asection *reliplt; + asection *dynbss; + asection *relbss; + asection *glink; + asection *sfpr; + asection *brlt; + asection *relbrlt; + asection *glink_eh_frame; + + /* Shortcut to .__tls_get_addr and __tls_get_addr. */ + struct ppc_link_hash_entry *tls_get_addr; + struct ppc_link_hash_entry *tls_get_addr_fd; + + /* The size of reliplt used by got entry relocs. */ + bfd_size_type got_reli_size; + + /* Statistics. */ + unsigned long stub_count[ppc_stub_plt_call_r2save]; + + /* Number of stubs against global syms. */ + unsigned long stub_globals; + + /* Alignment of PLT call stubs. */ + unsigned int plt_stub_align:4; + + /* Set if PLT call stubs should load r11. */ + unsigned int plt_static_chain:1; + + /* Set if PLT call stubs need a read-read barrier. */ + unsigned int plt_thread_safe:1; + + /* Set if we should emit symbols for stubs. */ + unsigned int emit_stub_syms:1; + + /* Set if __tls_get_addr optimization should not be done. */ + unsigned int no_tls_get_addr_opt:1; + + /* Support for multiple toc sections. */ + unsigned int do_multi_toc:1; + unsigned int multi_toc_needed:1; + unsigned int second_toc_pass:1; + unsigned int do_toc_opt:1; + + /* Set on error. */ + unsigned int stub_error:1; + + /* Temp used by ppc64_elf_process_dot_syms. */ + unsigned int twiddled_syms:1; + + /* Incremented every time we size stubs. */ + unsigned int stub_iteration; + + /* Small local sym cache. */ + struct sym_cache sym_cache; +}; + +/* Rename some of the generic section flags to better document how they + are used here. */ + +/* Nonzero if this section has TLS related relocations. */ +#define has_tls_reloc sec_flg0 + +/* Nonzero if this section has a call to __tls_get_addr. */ +#define has_tls_get_addr_call sec_flg1 + +/* Nonzero if this section has any toc or got relocs. */ +#define has_toc_reloc sec_flg2 + +/* Nonzero if this section has a call to another section that uses + the toc or got. */ +#define makes_toc_func_call sec_flg3 + +/* Recursion protection when determining above flag. */ +#define call_check_in_progress sec_flg4 +#define call_check_done sec_flg5 + +/* Get the ppc64 ELF linker hash table from a link_info structure. */ + +#define ppc_hash_table(p) \ + (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ + == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL) + +#define ppc_stub_hash_lookup(table, string, create, copy) \ + ((struct ppc_stub_hash_entry *) \ + bfd_hash_lookup ((table), (string), (create), (copy))) + +#define ppc_branch_hash_lookup(table, string, create, copy) \ + ((struct ppc_branch_hash_entry *) \ + bfd_hash_lookup ((table), (string), (create), (copy))) + +/* Create an entry in the stub hash table. */ + +static struct bfd_hash_entry * +stub_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = bfd_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct ppc_stub_hash_entry *eh; + + /* Initialize the local fields. */ + eh = (struct ppc_stub_hash_entry *) entry; + eh->stub_type = ppc_stub_none; + eh->stub_sec = NULL; + eh->stub_offset = 0; + eh->target_value = 0; + eh->target_section = NULL; + eh->h = NULL; + eh->id_sec = NULL; + } + + return entry; +} + +/* Create an entry in the branch hash table. */ + +static struct bfd_hash_entry * +branch_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = bfd_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct ppc_branch_hash_entry *eh; + + /* Initialize the local fields. */ + eh = (struct ppc_branch_hash_entry *) entry; + eh->offset = 0; + eh->iter = 0; + } + + return entry; +} + +/* Create an entry in a ppc64 ELF linker hash table. */ + +static struct bfd_hash_entry * +link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = _bfd_elf_link_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; + + memset (&eh->u.stub_cache, 0, + (sizeof (struct ppc_link_hash_entry) + - offsetof (struct ppc_link_hash_entry, u.stub_cache))); + + /* When making function calls, old ABI code references function entry + points (dot symbols), while new ABI code references the function + descriptor symbol. We need to make any combination of reference and + definition work together, without breaking archive linking. + + For a defined function "foo" and an undefined call to "bar": + An old object defines "foo" and ".foo", references ".bar" (possibly + "bar" too). + A new object defines "foo" and references "bar". + + A new object thus has no problem with its undefined symbols being + satisfied by definitions in an old object. On the other hand, the + old object won't have ".bar" satisfied by a new object. + + Keep a list of newly added dot-symbols. */ + + if (string[0] == '.') + { + struct ppc_link_hash_table *htab; + + htab = (struct ppc_link_hash_table *) table; + eh->u.next_dot_sym = htab->dot_syms; + htab->dot_syms = eh; + } + } + + return entry; +} + +struct tocsave_entry { + asection *sec; + bfd_vma offset; +}; + +static hashval_t +tocsave_htab_hash (const void *p) +{ + const struct tocsave_entry *e = (const struct tocsave_entry *) p; + return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3; +} + +static int +tocsave_htab_eq (const void *p1, const void *p2) +{ + const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1; + const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2; + return e1->sec == e2->sec && e1->offset == e2->offset; +} + +/* Create a ppc64 ELF linker hash table. */ + +static struct bfd_link_hash_table * +ppc64_elf_link_hash_table_create (bfd *abfd) +{ + struct ppc_link_hash_table *htab; + bfd_size_type amt = sizeof (struct ppc_link_hash_table); + + htab = bfd_zmalloc (amt); + if (htab == NULL) + return NULL; + + if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc, + sizeof (struct ppc_link_hash_entry), + PPC64_ELF_DATA)) + { + free (htab); + return NULL; + } + + /* Init the stub hash table too. */ + if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, + sizeof (struct ppc_stub_hash_entry))) + return NULL; + + /* And the branch hash table. */ + if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc, + sizeof (struct ppc_branch_hash_entry))) + return NULL; + + htab->tocsave_htab = htab_try_create (1024, + tocsave_htab_hash, + tocsave_htab_eq, + NULL); + if (htab->tocsave_htab == NULL) + return NULL; + + /* Initializing two fields of the union is just cosmetic. We really + only care about glist, but when compiled on a 32-bit host the + bfd_vma fields are larger. Setting the bfd_vma to zero makes + debugger inspection of these fields look nicer. */ + htab->elf.init_got_refcount.refcount = 0; + htab->elf.init_got_refcount.glist = NULL; + htab->elf.init_plt_refcount.refcount = 0; + htab->elf.init_plt_refcount.glist = NULL; + htab->elf.init_got_offset.offset = 0; + htab->elf.init_got_offset.glist = NULL; + htab->elf.init_plt_offset.offset = 0; + htab->elf.init_plt_offset.glist = NULL; + + return &htab->elf.root; +} + +/* Free the derived linker hash table. */ + +static void +ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash) +{ + struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash; + + bfd_hash_table_free (&htab->stub_hash_table); + bfd_hash_table_free (&htab->branch_hash_table); + if (htab->tocsave_htab) + htab_delete (htab->tocsave_htab); + _bfd_elf_link_hash_table_free (hash); +} + +/* Create sections for linker generated code. */ + +static bfd_boolean +create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + flagword flags; + + htab = ppc_hash_table (info); + + /* Create .sfpr for code to save and restore fp regs. */ + flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr", + flags); + if (htab->sfpr == NULL + || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) + return FALSE; + + /* Create .glink for lazy dynamic linking support. */ + htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", + flags); + if (htab->glink == NULL + || ! bfd_set_section_alignment (dynobj, htab->glink, 3)) + return FALSE; + + if (!info->no_ld_generated_unwind_info) + { + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS + | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj, + ".eh_frame", + flags); + if (htab->glink_eh_frame == NULL + || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2)) + return FALSE; + } + + flags = SEC_ALLOC | SEC_LINKER_CREATED; + htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags); + if (htab->iplt == NULL + || ! bfd_set_section_alignment (dynobj, htab->iplt, 3)) + return FALSE; + + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->reliplt = bfd_make_section_anyway_with_flags (dynobj, + ".rela.iplt", + flags); + if (htab->reliplt == NULL + || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3)) + return FALSE; + + /* Create branch lookup table for plt_branch stubs. */ + flags = (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", + flags); + if (htab->brlt == NULL + || ! bfd_set_section_alignment (dynobj, htab->brlt, 3)) + return FALSE; + + if (!info->shared) + return TRUE; + + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj, + ".rela.branch_lt", + flags); + if (htab->relbrlt == NULL + || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3)) + return FALSE; + + return TRUE; +} + +/* Satisfy the ELF linker by filling in some fields in our fake bfd. */ + +bfd_boolean +ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + + elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64; + +/* Always hook our dynamic sections into the first bfd, which is the + linker created stub bfd. This ensures that the GOT header is at + the start of the output TOC section. */ + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + htab->stub_bfd = abfd; + htab->elf.dynobj = abfd; + + if (info->relocatable) + return TRUE; + + return create_linkage_sections (htab->elf.dynobj, info); +} + +/* Build a name for an entry in the stub hash table. */ + +static char * +ppc_stub_name (const asection *input_section, + const asection *sym_sec, + const struct ppc_link_hash_entry *h, + const Elf_Internal_Rela *rel) +{ + char *stub_name; + ssize_t len; + + /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 + offsets from a sym as a branch target? In fact, we could + probably assume the addend is always zero. */ + BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); + + if (h) + { + len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; + stub_name = bfd_malloc (len); + if (stub_name == NULL) + return stub_name; + + len = sprintf (stub_name, "%08x.%s+%x", + input_section->id & 0xffffffff, + h->elf.root.root.string, + (int) rel->r_addend & 0xffffffff); + } + else + { + len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; + stub_name = bfd_malloc (len); + if (stub_name == NULL) + return stub_name; + + len = sprintf (stub_name, "%08x.%x:%x+%x", + input_section->id & 0xffffffff, + sym_sec->id & 0xffffffff, + (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, + (int) rel->r_addend & 0xffffffff); + } + if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0') + stub_name[len - 2] = 0; + return stub_name; +} + +/* Look up an entry in the stub hash. Stub entries are cached because + creating the stub name takes a bit of time. */ + +static struct ppc_stub_hash_entry * +ppc_get_stub_entry (const asection *input_section, + const asection *sym_sec, + struct ppc_link_hash_entry *h, + const Elf_Internal_Rela *rel, + struct ppc_link_hash_table *htab) +{ + struct ppc_stub_hash_entry *stub_entry; + const asection *id_sec; + + /* If this input section is part of a group of sections sharing one + stub section, then use the id of the first section in the group. + Stub names need to include a section id, as there may well be + more than one stub used to reach say, printf, and we need to + distinguish between them. */ + id_sec = htab->stub_group[input_section->id].link_sec; + + if (h != NULL && h->u.stub_cache != NULL + && h->u.stub_cache->h == h + && h->u.stub_cache->id_sec == id_sec) + { + stub_entry = h->u.stub_cache; + } + else + { + char *stub_name; + + stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); + if (stub_name == NULL) + return NULL; + + stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, + stub_name, FALSE, FALSE); + if (h != NULL) + h->u.stub_cache = stub_entry; + + free (stub_name); + } + + return stub_entry; +} + +/* Add a new stub entry to the stub hash. Not all fields of the new + stub entry are initialised. */ + +static struct ppc_stub_hash_entry * +ppc_add_stub (const char *stub_name, + asection *section, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + asection *link_sec; + asection *stub_sec; + struct ppc_stub_hash_entry *stub_entry; + + link_sec = htab->stub_group[section->id].link_sec; + stub_sec = htab->stub_group[section->id].stub_sec; + if (stub_sec == NULL) + { + stub_sec = htab->stub_group[link_sec->id].stub_sec; + if (stub_sec == NULL) + { + size_t namelen; + bfd_size_type len; + char *s_name; + + namelen = strlen (link_sec->name); + len = namelen + sizeof (STUB_SUFFIX); + s_name = bfd_alloc (htab->stub_bfd, len); + if (s_name == NULL) + return NULL; + + memcpy (s_name, link_sec->name, namelen); + memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); + stub_sec = (*htab->add_stub_section) (s_name, link_sec); + if (stub_sec == NULL) + return NULL; + htab->stub_group[link_sec->id].stub_sec = stub_sec; + } + htab->stub_group[section->id].stub_sec = stub_sec; + } + + /* Enter this entry into the linker stub hash table. */ + stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, + TRUE, FALSE); + if (stub_entry == NULL) + { + info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"), + section->owner, stub_name); + return NULL; + } + + stub_entry->stub_sec = stub_sec; + stub_entry->stub_offset = 0; + stub_entry->id_sec = link_sec; + return stub_entry; +} + +/* Create .got and .rela.got sections in ABFD, and .got in dynobj if + not already done. */ + +static bfd_boolean +create_got_section (bfd *abfd, struct bfd_link_info *info) +{ + asection *got, *relgot; + flagword flags; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (!is_ppc64_elf (abfd)) + return FALSE; + if (htab == NULL) + return FALSE; + + if (!htab->got) + { + if (! _bfd_elf_create_got_section (htab->elf.dynobj, info)) + return FALSE; + + htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got"); + if (!htab->got) + abort (); + } + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + + got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); + if (!got + || !bfd_set_section_alignment (abfd, got, 3)) + return FALSE; + + relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got", + flags | SEC_READONLY); + if (!relgot + || ! bfd_set_section_alignment (abfd, relgot, 3)) + return FALSE; + + ppc64_elf_tdata (abfd)->got = got; + ppc64_elf_tdata (abfd)->relgot = relgot; + return TRUE; +} + +/* Create the dynamic sections, and set up shortcuts. */ + +static bfd_boolean +ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + + if (!_bfd_elf_create_dynamic_sections (dynobj, info)) + return FALSE; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + if (!htab->got) + htab->got = bfd_get_linker_section (dynobj, ".got"); + htab->plt = bfd_get_linker_section (dynobj, ".plt"); + htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt"); + htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss"); + if (!info->shared) + htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss"); + + if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss + || (!info->shared && !htab->relbss)) + abort (); + + return TRUE; +} + +/* Follow indirect and warning symbol links. */ + +static inline struct bfd_link_hash_entry * +follow_link (struct bfd_link_hash_entry *h) +{ + while (h->type == bfd_link_hash_indirect + || h->type == bfd_link_hash_warning) + h = h->u.i.link; + return h; +} + +static inline struct elf_link_hash_entry * +elf_follow_link (struct elf_link_hash_entry *h) +{ + return (struct elf_link_hash_entry *) follow_link (&h->root); +} + +static inline struct ppc_link_hash_entry * +ppc_follow_link (struct ppc_link_hash_entry *h) +{ + return (struct ppc_link_hash_entry *) follow_link (&h->elf.root); +} + +/* Merge PLT info on FROM with that on TO. */ + +static void +move_plt_plist (struct ppc_link_hash_entry *from, + struct ppc_link_hash_entry *to) +{ + if (from->elf.plt.plist != NULL) + { + if (to->elf.plt.plist != NULL) + { + struct plt_entry **entp; + struct plt_entry *ent; + + for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; ) + { + struct plt_entry *dent; + + for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next) + if (dent->addend == ent->addend) + { + dent->plt.refcount += ent->plt.refcount; + *entp = ent->next; + break; + } + if (dent == NULL) + entp = &ent->next; + } + *entp = to->elf.plt.plist; + } + + to->elf.plt.plist = from->elf.plt.plist; + from->elf.plt.plist = NULL; + } +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ + +static void +ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct ppc_link_hash_entry *edir, *eind; + + edir = (struct ppc_link_hash_entry *) dir; + eind = (struct ppc_link_hash_entry *) ind; + + edir->is_func |= eind->is_func; + edir->is_func_descriptor |= eind->is_func_descriptor; + edir->tls_mask |= eind->tls_mask; + if (eind->oh != NULL) + edir->oh = ppc_follow_link (eind->oh); + + /* If called to transfer flags for a weakdef during processing + of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF. + We clear it ourselves for ELIMINATE_COPY_RELOCS. */ + if (!(ELIMINATE_COPY_RELOCS + && eind->elf.root.type != bfd_link_hash_indirect + && edir->elf.dynamic_adjusted)) + edir->elf.non_got_ref |= eind->elf.non_got_ref; + + edir->elf.ref_dynamic |= eind->elf.ref_dynamic; + edir->elf.ref_regular |= eind->elf.ref_regular; + edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; + edir->elf.needs_plt |= eind->elf.needs_plt; + + /* Copy over any dynamic relocs we may have on the indirect sym. */ + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) + { + struct elf_dyn_relocs **pp; + struct elf_dyn_relocs *p; + + /* Add reloc counts against the indirect sym to the direct sym + list. Merge any entries against the same section. */ + for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) + { + struct elf_dyn_relocs *q; + + for (q = edir->dyn_relocs; q != NULL; q = q->next) + if (q->sec == p->sec) + { + q->pc_count += p->pc_count; + q->count += p->count; + *pp = p->next; + break; + } + if (q == NULL) + pp = &p->next; + } + *pp = edir->dyn_relocs; + } + + edir->dyn_relocs = eind->dyn_relocs; + eind->dyn_relocs = NULL; + } + + /* If we were called to copy over info for a weak sym, that's all. + You might think dyn_relocs need not be copied over; After all, + both syms will be dynamic or both non-dynamic so we're just + moving reloc accounting around. However, ELIMINATE_COPY_RELOCS + code in ppc64_elf_adjust_dynamic_symbol needs to check for + dyn_relocs in read-only sections, and it does so on what is the + DIR sym here. */ + if (eind->elf.root.type != bfd_link_hash_indirect) + return; + + /* Copy over got entries that we may have already seen to the + symbol which just became indirect. */ + if (eind->elf.got.glist != NULL) + { + if (edir->elf.got.glist != NULL) + { + struct got_entry **entp; + struct got_entry *ent; + + for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) + { + struct got_entry *dent; + + for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) + if (dent->addend == ent->addend + && dent->owner == ent->owner + && dent->tls_type == ent->tls_type) + { + dent->got.refcount += ent->got.refcount; + *entp = ent->next; + break; + } + if (dent == NULL) + entp = &ent->next; + } + *entp = edir->elf.got.glist; + } + + edir->elf.got.glist = eind->elf.got.glist; + eind->elf.got.glist = NULL; + } + + /* And plt entries. */ + move_plt_plist (eind, edir); + + if (eind->elf.dynindx != -1) + { + if (edir->elf.dynindx != -1) + _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, + edir->elf.dynstr_index); + edir->elf.dynindx = eind->elf.dynindx; + edir->elf.dynstr_index = eind->elf.dynstr_index; + eind->elf.dynindx = -1; + eind->elf.dynstr_index = 0; + } +} + +/* Find the function descriptor hash entry from the given function code + hash entry FH. Link the entries via their OH fields. */ + +static struct ppc_link_hash_entry * +lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) +{ + struct ppc_link_hash_entry *fdh = fh->oh; + + if (fdh == NULL) + { + const char *fd_name = fh->elf.root.root.string + 1; + + fdh = (struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE); + if (fdh == NULL) + return fdh; + + fdh->is_func_descriptor = 1; + fdh->oh = fh; + fh->is_func = 1; + fh->oh = fdh; + } + + return ppc_follow_link (fdh); +} + +/* Make a fake function descriptor sym for the code sym FH. */ + +static struct ppc_link_hash_entry * +make_fdh (struct bfd_link_info *info, + struct ppc_link_hash_entry *fh) +{ + bfd *abfd; + asymbol *newsym; + struct bfd_link_hash_entry *bh; + struct ppc_link_hash_entry *fdh; + + abfd = fh->elf.root.u.undef.abfd; + newsym = bfd_make_empty_symbol (abfd); + newsym->name = fh->elf.root.root.string + 1; + newsym->section = bfd_und_section_ptr; + newsym->value = 0; + newsym->flags = BSF_WEAK; + + bh = NULL; + if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name, + newsym->flags, newsym->section, + newsym->value, NULL, FALSE, FALSE, + &bh)) + return NULL; + + fdh = (struct ppc_link_hash_entry *) bh; + fdh->elf.non_elf = 0; + fdh->fake = 1; + fdh->is_func_descriptor = 1; + fdh->oh = fh; + fh->is_func = 1; + fh->oh = fdh; + return fdh; +} + +/* Fix function descriptor symbols defined in .opd sections to be + function type. */ + +static bfd_boolean +ppc64_elf_add_symbol_hook (bfd *ibfd, + struct bfd_link_info *info, + Elf_Internal_Sym *isym, + const char **name ATTRIBUTE_UNUSED, + flagword *flags ATTRIBUTE_UNUSED, + asection **sec, + bfd_vma *value ATTRIBUTE_UNUSED) +{ + if ((ibfd->flags & DYNAMIC) == 0 + && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE) + elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; + + if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) + { + if ((ibfd->flags & DYNAMIC) == 0) + elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; + } + else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC) + ; + else if (*sec != NULL + && strcmp ((*sec)->name, ".opd") == 0) + isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); + + return TRUE; +} + +/* This function makes an old ABI object reference to ".bar" cause the + inclusion of a new ABI object archive that defines "bar". + NAME is a symbol defined in an archive. Return a symbol in the hash + table that might be satisfied by the archive symbols. */ + +static struct elf_link_hash_entry * +ppc64_elf_archive_symbol_lookup (bfd *abfd, + struct bfd_link_info *info, + const char *name) +{ + struct elf_link_hash_entry *h; + char *dot_name; + size_t len; + + h = _bfd_elf_archive_symbol_lookup (abfd, info, name); + if (h != NULL + /* Don't return this sym if it is a fake function descriptor + created by add_symbol_adjust. */ + && !(h->root.type == bfd_link_hash_undefweak + && ((struct ppc_link_hash_entry *) h)->fake)) + return h; + + if (name[0] == '.') + return h; + + len = strlen (name); + dot_name = bfd_alloc (abfd, len + 2); + if (dot_name == NULL) + return (struct elf_link_hash_entry *) 0 - 1; + dot_name[0] = '.'; + memcpy (dot_name + 1, name, len + 1); + h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name); + bfd_release (abfd, dot_name); + return h; +} + +/* This function satisfies all old ABI object references to ".bar" if a + new ABI object defines "bar". Well, at least, undefined dot symbols + are made weak. This stops later archive searches from including an + object if we already have a function descriptor definition. It also + prevents the linker complaining about undefined symbols. + We also check and correct mismatched symbol visibility here. The + most restrictive visibility of the function descriptor and the + function entry symbol is used. */ + +static bfd_boolean +add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + struct ppc_link_hash_entry *fdh; + + if (eh->elf.root.type == bfd_link_hash_indirect) + return TRUE; + + if (eh->elf.root.type == bfd_link_hash_warning) + eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; + + if (eh->elf.root.root.string[0] != '.') + abort (); + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + fdh = lookup_fdh (eh, htab); + if (fdh == NULL) + { + if (!info->relocatable + && (eh->elf.root.type == bfd_link_hash_undefined + || eh->elf.root.type == bfd_link_hash_undefweak) + && eh->elf.ref_regular) + { + /* Make an undefweak function descriptor sym, which is enough to + pull in an --as-needed shared lib, but won't cause link + errors. Archives are handled elsewhere. */ + fdh = make_fdh (info, eh); + if (fdh == NULL) + return FALSE; + fdh->elf.ref_regular = 1; + } + } + else + { + unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1; + unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1; + if (entry_vis < descr_vis) + fdh->elf.other += entry_vis - descr_vis; + else if (entry_vis > descr_vis) + eh->elf.other += descr_vis - entry_vis; + + if ((fdh->elf.root.type == bfd_link_hash_defined + || fdh->elf.root.type == bfd_link_hash_defweak) + && eh->elf.root.type == bfd_link_hash_undefined) + { + eh->elf.root.type = bfd_link_hash_undefweak; + eh->was_undefined = 1; + htab->twiddled_syms = 1; + } + } + + return TRUE; +} + +/* Process list of dot-symbols we made in link_hash_newfunc. */ + +static bfd_boolean +ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + struct ppc_link_hash_entry **p, *eh; + + if (!is_ppc64_elf (info->output_bfd)) + return TRUE; + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + if (is_ppc64_elf (ibfd)) + { + p = &htab->dot_syms; + while ((eh = *p) != NULL) + { + *p = NULL; + if (&eh->elf == htab->elf.hgot) + ; + else if (htab->elf.hgot == NULL + && strcmp (eh->elf.root.root.string, ".TOC.") == 0) + htab->elf.hgot = &eh->elf; + else if (!add_symbol_adjust (eh, info)) + return FALSE; + p = &eh->u.next_dot_sym; + } + } + + /* Clear the list for non-ppc64 input files. */ + p = &htab->dot_syms; + while ((eh = *p) != NULL) + { + *p = NULL; + p = &eh->u.next_dot_sym; + } + + /* We need to fix the undefs list for any syms we have twiddled to + undef_weak. */ + if (htab->twiddled_syms) + { + bfd_link_repair_undef_list (&htab->elf.root); + htab->twiddled_syms = 0; + } + return TRUE; +} + +/* Undo hash table changes when an --as-needed input file is determined + not to be needed. */ + +static bfd_boolean +ppc64_elf_notice_as_needed (bfd *ibfd, + struct bfd_link_info *info, + enum notice_asneeded_action act) +{ + if (act == notice_not_needed) + { + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab == NULL) + return FALSE; + + htab->dot_syms = NULL; + } + return _bfd_elf_notice_as_needed (ibfd, info, act); +} + +/* If --just-symbols against a final linked binary, then assume we need + toc adjusting stubs when calling functions defined there. */ + +static void +ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info) +{ + if ((sec->flags & SEC_CODE) != 0 + && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0 + && is_ppc64_elf (sec->owner)) + { + asection *got = bfd_get_section_by_name (sec->owner, ".got"); + if (got != NULL + && got->size >= elf_backend_got_header_size + && bfd_get_section_by_name (sec->owner, ".opd") != NULL) + sec->has_toc_reloc = 1; + } + _bfd_elf_link_just_syms (sec, info); +} + +static struct plt_entry ** +update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, + unsigned long r_symndx, bfd_vma r_addend, int tls_type) +{ + struct got_entry **local_got_ents = elf_local_got_ents (abfd); + struct plt_entry **local_plt; + unsigned char *local_got_tls_masks; + + if (local_got_ents == NULL) + { + bfd_size_type size = symtab_hdr->sh_info; + + size *= (sizeof (*local_got_ents) + + sizeof (*local_plt) + + sizeof (*local_got_tls_masks)); + local_got_ents = bfd_zalloc (abfd, size); + if (local_got_ents == NULL) + return NULL; + elf_local_got_ents (abfd) = local_got_ents; + } + + if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0) + { + struct got_entry *ent; + + for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) + if (ent->addend == r_addend + && ent->owner == abfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + { + bfd_size_type amt = sizeof (*ent); + ent = bfd_alloc (abfd, amt); + if (ent == NULL) + return FALSE; + ent->next = local_got_ents[r_symndx]; + ent->addend = r_addend; + ent->owner = abfd; + ent->tls_type = tls_type; + ent->is_indirect = FALSE; + ent->got.refcount = 0; + local_got_ents[r_symndx] = ent; + } + ent->got.refcount += 1; + } + + local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info); + local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info); + local_got_tls_masks[r_symndx] |= tls_type; + + return local_plt + r_symndx; +} + +static bfd_boolean +update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend) +{ + struct plt_entry *ent; + + for (ent = *plist; ent != NULL; ent = ent->next) + if (ent->addend == addend) + break; + if (ent == NULL) + { + bfd_size_type amt = sizeof (*ent); + ent = bfd_alloc (abfd, amt); + if (ent == NULL) + return FALSE; + ent->next = *plist; + ent->addend = addend; + ent->plt.refcount = 0; + *plist = ent; + } + ent->plt.refcount += 1; + return TRUE; +} + +static bfd_boolean +is_branch_reloc (enum elf_ppc64_reloc_type r_type) +{ + return (r_type == R_PPC64_REL24 + || r_type == R_PPC64_REL14 + || r_type == R_PPC64_REL14_BRTAKEN + || r_type == R_PPC64_REL14_BRNTAKEN + || r_type == R_PPC64_ADDR24 + || r_type == R_PPC64_ADDR14 + || r_type == R_PPC64_ADDR14_BRTAKEN + || r_type == R_PPC64_ADDR14_BRNTAKEN); +} + +/* Look through the relocs for a section during the first phase, and + calculate needed space in the global offset table, procedure + linkage table, and dynamic reloc sections. */ + +static bfd_boolean +ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + struct ppc_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + asection *sreloc; + asection **opd_sym_map; + struct elf_link_hash_entry *tga, *dottga; + + if (info->relocatable) + return TRUE; + + /* Don't do anything special with non-loaded, non-alloced sections. + In particular, any relocs in such sections should not affect GOT + and PLT reference counting (ie. we don't allow them to create GOT + or PLT entries), there's no possibility or desire to optimize TLS + relocs, and there's not much point in propagating relocs to shared + libs that the dynamic linker won't relocate. */ + if ((sec->flags & SEC_ALLOC) == 0) + return TRUE; + + BFD_ASSERT (is_ppc64_elf (abfd)); + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", + FALSE, FALSE, TRUE); + dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", + FALSE, FALSE, TRUE); + symtab_hdr = &elf_symtab_hdr (abfd); + sym_hashes = elf_sym_hashes (abfd); + sreloc = NULL; + opd_sym_map = NULL; + if (strcmp (sec->name, ".opd") == 0) + { + /* Garbage collection needs some extra help with .opd sections. + We don't want to necessarily keep everything referenced by + relocs in .opd, as that would keep all functions. Instead, + if we reference an .opd symbol (a function descriptor), we + want to keep the function code symbol's section. This is + easy for global symbols, but for local syms we need to keep + information about the associated function section. */ + bfd_size_type amt; + + amt = sec->size * sizeof (*opd_sym_map) / 8; + opd_sym_map = bfd_zalloc (abfd, amt); + if (opd_sym_map == NULL) + return FALSE; + ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map; + BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal); + ppc64_elf_section_data (sec)->sec_type = sec_opd; + } + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h; + enum elf_ppc64_reloc_type r_type; + int tls_type; + struct _ppc64_elf_section_data *ppc64_sec; + struct plt_entry **ifunc; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + h = elf_follow_link (h); + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.non_ir_ref = 1; + + if (h == htab->elf.hgot) + sec->has_toc_reloc = 1; + } + + tls_type = 0; + ifunc = NULL; + if (h != NULL) + { + if (h->type == STT_GNU_IFUNC) + { + h->needs_plt = 1; + ifunc = &h->plt.plist; + } + } + else + { + Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + + if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) + { + ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, + rel->r_addend, PLT_IFUNC); + if (ifunc == NULL) + return FALSE; + } + } + r_type = ELF64_R_TYPE (rel->r_info); + if (is_branch_reloc (r_type)) + { + if (h != NULL && (h == tga || h == dottga)) + { + if (rel != relocs + && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD + || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD)) + /* We have a new-style __tls_get_addr call with a marker + reloc. */ + ; + else + /* Mark this section as having an old-style call. */ + sec->has_tls_get_addr_call = 1; + } + + /* STT_GNU_IFUNC symbols must have a PLT entry. */ + if (ifunc != NULL + && !update_plt_info (abfd, ifunc, rel->r_addend)) + return FALSE; + } + + switch (r_type) + { + case R_PPC64_TLSGD: + case R_PPC64_TLSLD: + /* These special tls relocs tie a call to __tls_get_addr with + its parameter symbol. */ + break; + + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + tls_type = TLS_TLS | TLS_LD; + goto dogottls; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogottls; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + if (!info->executable) + info->flags |= DF_STATIC_TLS; + tls_type = TLS_TLS | TLS_TPREL; + goto dogottls; + + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + dogottls: + sec->has_tls_reloc = 1; + /* Fall thru */ + + case R_PPC64_GOT16: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_LO_DS: + /* This symbol requires a global offset table entry. */ + sec->has_toc_reloc = 1; + if (r_type == R_PPC64_GOT_TLSLD16 + || r_type == R_PPC64_GOT_TLSGD16 + || r_type == R_PPC64_GOT_TPREL16_DS + || r_type == R_PPC64_GOT_DTPREL16_DS + || r_type == R_PPC64_GOT16 + || r_type == R_PPC64_GOT16_DS) + { + htab->do_multi_toc = 1; + ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; + } + + if (ppc64_elf_tdata (abfd)->got == NULL + && !create_got_section (abfd, info)) + return FALSE; + + if (h != NULL) + { + struct ppc_link_hash_entry *eh; + struct got_entry *ent; + + eh = (struct ppc_link_hash_entry *) h; + for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == abfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + { + bfd_size_type amt = sizeof (*ent); + ent = bfd_alloc (abfd, amt); + if (ent == NULL) + return FALSE; + ent->next = eh->elf.got.glist; + ent->addend = rel->r_addend; + ent->owner = abfd; + ent->tls_type = tls_type; + ent->is_indirect = FALSE; + ent->got.refcount = 0; + eh->elf.got.glist = ent; + } + ent->got.refcount += 1; + eh->tls_mask |= tls_type; + } + else + /* This is a global offset table entry for a local symbol. */ + if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, + rel->r_addend, tls_type)) + return FALSE; + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + /* This symbol requires a procedure linkage table entry. We + actually build the entry in adjust_dynamic_symbol, + because this might be a case of linking PIC code without + linking in any dynamic objects, in which case we don't + need to generate a procedure linkage table after all. */ + if (h == NULL) + { + /* It does not make sense to have a procedure linkage + table entry for a local symbol. */ + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + else + { + if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend)) + return FALSE; + h->needs_plt = 1; + if (h->root.root.string[0] == '.' + && h->root.root.string[1] != '\0') + ((struct ppc_link_hash_entry *) h)->is_func = 1; + } + break; + + /* The following relocations don't need to propagate the + relocation if linking a shared object since they are + section relative. */ + case R_PPC64_SECTOFF: + case R_PPC64_SECTOFF_LO: + case R_PPC64_SECTOFF_HI: + case R_PPC64_SECTOFF_HA: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_DTPREL16: + case R_PPC64_DTPREL16_LO: + case R_PPC64_DTPREL16_HI: + case R_PPC64_DTPREL16_HA: + case R_PPC64_DTPREL16_DS: + case R_PPC64_DTPREL16_LO_DS: + case R_PPC64_DTPREL16_HIGHER: + case R_PPC64_DTPREL16_HIGHERA: + case R_PPC64_DTPREL16_HIGHEST: + case R_PPC64_DTPREL16_HIGHESTA: + break; + + /* Nor do these. */ + case R_PPC64_REL16: + case R_PPC64_REL16_LO: + case R_PPC64_REL16_HI: + case R_PPC64_REL16_HA: + break; + + case R_PPC64_TOC16: + case R_PPC64_TOC16_DS: + htab->do_multi_toc = 1; + ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_HA: + case R_PPC64_TOC16_LO_DS: + sec->has_toc_reloc = 1; + break; + + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_PPC64_GNU_VTINHERIT: + if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_PPC64_GNU_VTENTRY: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL14_BRNTAKEN: + { + asection *dest = NULL; + + /* Heuristic: If jumping outside our section, chances are + we are going to need a stub. */ + if (h != NULL) + { + /* If the sym is weak it may be overridden later, so + don't assume we know where a weak sym lives. */ + if (h->root.type == bfd_link_hash_defined) + dest = h->root.u.def.section; + } + else + { + Elf_Internal_Sym *isym; + + isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + + dest = bfd_section_from_elf_index (abfd, isym->st_shndx); + } + + if (dest != sec) + ppc64_elf_section_data (sec)->has_14bit_branch = 1; + } + /* Fall through. */ + + case R_PPC64_REL24: + if (h != NULL && ifunc == NULL) + { + /* We may need a .plt entry if the function this reloc + refers to is in a shared lib. */ + if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend)) + return FALSE; + h->needs_plt = 1; + if (h->root.root.string[0] == '.' + && h->root.root.string[1] != '\0') + ((struct ppc_link_hash_entry *) h)->is_func = 1; + if (h == tga || h == dottga) + sec->has_tls_reloc = 1; + } + break; + + case R_PPC64_TPREL64: + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; + if (!info->executable) + info->flags |= DF_STATIC_TLS; + goto dotlstoc; + + case R_PPC64_DTPMOD64: + if (rel + 1 < rel_end + && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) + && rel[1].r_offset == rel->r_offset + 8) + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; + else + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; + goto dotlstoc; + + case R_PPC64_DTPREL64: + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; + if (rel != relocs + && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) + && rel[-1].r_offset == rel->r_offset - 8) + /* This is the second reloc of a dtpmod, dtprel pair. + Don't mark with TLS_DTPREL. */ + goto dodyn; + + dotlstoc: + sec->has_tls_reloc = 1; + if (h != NULL) + { + struct ppc_link_hash_entry *eh; + eh = (struct ppc_link_hash_entry *) h; + eh->tls_mask |= tls_type; + } + else + if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, + rel->r_addend, tls_type)) + return FALSE; + + ppc64_sec = ppc64_elf_section_data (sec); + if (ppc64_sec->sec_type != sec_toc) + { + bfd_size_type amt; + + /* One extra to simplify get_tls_mask. */ + amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned); + ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt); + if (ppc64_sec->u.toc.symndx == NULL) + return FALSE; + amt = sec->size * sizeof (bfd_vma) / 8; + ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt); + if (ppc64_sec->u.toc.add == NULL) + return FALSE; + BFD_ASSERT (ppc64_sec->sec_type == sec_normal); + ppc64_sec->sec_type = sec_toc; + } + BFD_ASSERT (rel->r_offset % 8 == 0); + ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx; + ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend; + + /* Mark the second slot of a GD or LD entry. + -1 to indicate GD and -2 to indicate LD. */ + if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) + ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1; + else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) + ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2; + goto dodyn; + + case R_PPC64_TPREL16: + case R_PPC64_TPREL16_LO: + case R_PPC64_TPREL16_HI: + case R_PPC64_TPREL16_HA: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + if (info->shared) + { + if (!info->executable) + info->flags |= DF_STATIC_TLS; + goto dodyn; + } + break; + + case R_PPC64_ADDR64: + if (opd_sym_map != NULL + && rel + 1 < rel_end + && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) + { + if (h != NULL) + { + if (h->root.root.string[0] == '.' + && h->root.root.string[1] != 0 + && lookup_fdh ((struct ppc_link_hash_entry *) h, htab)) + ; + else + ((struct ppc_link_hash_entry *) h)->is_func = 1; + } + else + { + asection *s; + Elf_Internal_Sym *isym; + + isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + + s = bfd_section_from_elf_index (abfd, isym->st_shndx); + if (s != NULL && s != sec) + opd_sym_map[rel->r_offset / 8] = s; + } + } + /* Fall through. */ + + case R_PPC64_REL30: + case R_PPC64_REL32: + case R_PPC64_REL64: + case R_PPC64_ADDR14: + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_ADDR16: + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_HA: + case R_PPC64_ADDR16_HI: + case R_PPC64_ADDR16_HIGHER: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHEST: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_ADDR16_LO: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_ADDR24: + case R_PPC64_ADDR32: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + case R_PPC64_TOC: + if (h != NULL && !info->shared) + /* We may need a copy reloc. */ + h->non_got_ref = 1; + + /* Don't propagate .opd relocs. */ + if (NO_OPD_RELOCS && opd_sym_map != NULL) + break; + + /* If we are creating a shared library, and this is a reloc + against a global symbol, or a non PC relative reloc + against a local symbol, then we need to copy the reloc + into the shared library. However, if we are linking with + -Bsymbolic, we do not need to copy a reloc against a + global symbol which is defined in an object we are + including in the link (i.e., DEF_REGULAR is set). At + this point we have not seen all the input files, so it is + possible that DEF_REGULAR is not set now but will be set + later (it is never cleared). In case of a weak definition, + DEF_REGULAR may be cleared later by a strong definition in + a shared library. We account for that possibility below by + storing information in the dyn_relocs field of the hash + table entry. A similar situation occurs when creating + shared libraries and symbol visibility changes render the + symbol local. + + If on the other hand, we are creating an executable, we + may need to keep relocations for symbols satisfied by a + dynamic library if we manage to avoid copy relocs for the + symbol. */ + dodyn: + if ((info->shared + && (must_be_dyn_reloc (info, r_type) + || (h != NULL + && (!SYMBOLIC_BIND (info, h) + || h->root.type == bfd_link_hash_defweak + || !h->def_regular)))) + || (ELIMINATE_COPY_RELOCS + && !info->shared + && h != NULL + && (h->root.type == bfd_link_hash_defweak + || !h->def_regular)) + || (!info->shared + && ifunc != NULL)) + { + /* We must copy these reloc types into the output file. + Create a reloc section in dynobj and make room for + this reloc. */ + if (sreloc == NULL) + { + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); + + if (sreloc == NULL) + return FALSE; + } + + /* If this is a global symbol, we count the number of + relocations we need for this symbol. */ + if (h != NULL) + { + struct elf_dyn_relocs *p; + struct elf_dyn_relocs **head; + + head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; + p = *head; + if (p == NULL || p->sec != sec) + { + p = bfd_alloc (htab->elf.dynobj, sizeof *p); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->sec = sec; + p->count = 0; + p->pc_count = 0; + } + p->count += 1; + if (!must_be_dyn_reloc (info, r_type)) + p->pc_count += 1; + } + else + { + /* Track dynamic relocs needed for local syms too. + We really need local syms available to do this + easily. Oh well. */ + struct ppc_dyn_relocs *p; + struct ppc_dyn_relocs **head; + bfd_boolean is_ifunc; + asection *s; + void *vpp; + Elf_Internal_Sym *isym; + + isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + + s = bfd_section_from_elf_index (abfd, isym->st_shndx); + if (s == NULL) + s = sec; + + vpp = &elf_section_data (s)->local_dynrel; + head = (struct ppc_dyn_relocs **) vpp; + is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; + p = *head; + if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) + p = p->next; + if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) + { + p = bfd_alloc (htab->elf.dynobj, sizeof *p); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->sec = sec; + p->ifunc = is_ifunc; + p->count = 0; + } + p->count += 1; + } + } + break; + + default: + break; + } + } + + return TRUE; +} + +/* OFFSET in OPD_SEC specifies a function descriptor. Return the address + of the code entry point, and its section. */ + +static bfd_vma +opd_entry_value (asection *opd_sec, + bfd_vma offset, + asection **code_sec, + bfd_vma *code_off, + bfd_boolean in_code_sec) +{ + bfd *opd_bfd = opd_sec->owner; + Elf_Internal_Rela *relocs; + Elf_Internal_Rela *lo, *hi, *look; + bfd_vma val; + + /* No relocs implies we are linking a --just-symbols object, or looking + at a final linked executable with addr2line or somesuch. */ + if (opd_sec->reloc_count == 0) + { + bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents; + + if (contents == NULL) + { + if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents)) + return (bfd_vma) -1; + ppc64_elf_tdata (opd_bfd)->opd.contents = contents; + } + + val = bfd_get_64 (opd_bfd, contents + offset); + if (code_sec != NULL) + { + asection *sec, *likely = NULL; + + if (in_code_sec) + { + sec = *code_sec; + if (sec->vma <= val + && val < sec->vma + sec->size) + likely = sec; + else + val = -1; + } + else + for (sec = opd_bfd->sections; sec != NULL; sec = sec->next) + if (sec->vma <= val + && (sec->flags & SEC_LOAD) != 0 + && (sec->flags & SEC_ALLOC) != 0) + likely = sec; + if (likely != NULL) + { + *code_sec = likely; + if (code_off != NULL) + *code_off = val - likely->vma; + } + } + return val; + } + + BFD_ASSERT (is_ppc64_elf (opd_bfd)); + + relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs; + if (relocs == NULL) + relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE); + + /* Go find the opd reloc at the sym address. */ + lo = relocs; + BFD_ASSERT (lo != NULL); + hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */ + val = (bfd_vma) -1; + while (lo < hi) + { + look = lo + (hi - lo) / 2; + if (look->r_offset < offset) + lo = look + 1; + else if (look->r_offset > offset) + hi = look; + else + { + Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd); + + if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64 + && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC) + { + unsigned long symndx = ELF64_R_SYM (look->r_info); + asection *sec; + + if (symndx < symtab_hdr->sh_info + || elf_sym_hashes (opd_bfd) == NULL) + { + Elf_Internal_Sym *sym; + + sym = (Elf_Internal_Sym *) symtab_hdr->contents; + if (sym == NULL) + { + size_t symcnt = symtab_hdr->sh_info; + if (elf_sym_hashes (opd_bfd) == NULL) + symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize; + sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt, + 0, NULL, NULL, NULL); + if (sym == NULL) + break; + symtab_hdr->contents = (bfd_byte *) sym; + } + + sym += symndx; + val = sym->st_value; + sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); + BFD_ASSERT ((sec->flags & SEC_MERGE) == 0); + } + else + { + struct elf_link_hash_entry **sym_hashes; + struct elf_link_hash_entry *rh; + + sym_hashes = elf_sym_hashes (opd_bfd); + rh = sym_hashes[symndx - symtab_hdr->sh_info]; + if (rh != NULL) + { + rh = elf_follow_link (rh); + BFD_ASSERT (rh->root.type == bfd_link_hash_defined + || rh->root.type == bfd_link_hash_defweak); + val = rh->root.u.def.value; + sec = rh->root.u.def.section; + } + else + { + /* Handle the odd case where we can be called + during bfd_elf_link_add_symbols before the + symbol hashes have been fully populated. */ + Elf_Internal_Sym *sym; + + sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1, + symndx, NULL, NULL, NULL); + if (sym == NULL) + break; + + val = sym->st_value; + sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); + free (sym); + } + } + val += look->r_addend; + if (code_off != NULL) + *code_off = val; + if (code_sec != NULL) + { + if (in_code_sec && *code_sec != sec) + return -1; + else + *code_sec = sec; + } + if (sec != NULL && sec->output_section != NULL) + val += sec->output_section->vma + sec->output_offset; + } + break; + } + } + + return val; +} + +/* If the ELF symbol SYM might be a function in SEC, return the + function size and set *CODE_OFF to the function's entry point, + otherwise return zero. */ + +static bfd_size_type +ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec, + bfd_vma *code_off) +{ + bfd_size_type size; + + if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT + | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0) + return 0; + + size = 0; + if (!(sym->flags & BSF_SYNTHETIC)) + size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size; + + if (strcmp (sym->section->name, ".opd") == 0) + { + if (opd_entry_value (sym->section, sym->value, + &sec, code_off, TRUE) == (bfd_vma) -1) + return 0; + /* An old ABI binary with dot-syms has a size of 24 on the .opd + symbol. This size has nothing to do with the code size of the + function, which is what we're supposed to return, but the + code size isn't available without looking up the dot-sym. + However, doing that would be a waste of time particularly + since elf_find_function will look at the dot-sym anyway. + Now, elf_find_function will keep the largest size of any + function sym found at the code address of interest, so return + 1 here to avoid it incorrectly caching a larger function size + for a small function. This does mean we return the wrong + size for a new-ABI function of size 24, but all that does is + disable caching for such functions. */ + if (size == 24) + size = 1; + } + else + { + if (sym->section != sec) + return 0; + *code_off = sym->value; + } + if (size == 0) + size = 1; + return size; +} + +/* Return true if symbol is defined in a regular object file. */ + +static bfd_boolean +is_static_defined (struct elf_link_hash_entry *h) +{ + return ((h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && h->root.u.def.section != NULL + && h->root.u.def.section->output_section != NULL); +} + +/* If FDH is a function descriptor symbol, return the associated code + entry symbol if it is defined. Return NULL otherwise. */ + +static struct ppc_link_hash_entry * +defined_code_entry (struct ppc_link_hash_entry *fdh) +{ + if (fdh->is_func_descriptor) + { + struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh); + if (fh->elf.root.type == bfd_link_hash_defined + || fh->elf.root.type == bfd_link_hash_defweak) + return fh; + } + return NULL; +} + +/* If FH is a function code entry symbol, return the associated + function descriptor symbol if it is defined. Return NULL otherwise. */ + +static struct ppc_link_hash_entry * +defined_func_desc (struct ppc_link_hash_entry *fh) +{ + if (fh->oh != NULL + && fh->oh->is_func_descriptor) + { + struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh); + if (fdh->elf.root.type == bfd_link_hash_defined + || fdh->elf.root.type == bfd_link_hash_defweak) + return fdh; + } + return NULL; +} + +/* Mark all our entry sym sections, both opd and code section. */ + +static void +ppc64_elf_gc_keep (struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + struct bfd_sym_chain *sym; + + if (htab == NULL) + return; + + for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) + { + struct ppc_link_hash_entry *eh, *fh; + asection *sec; + + eh = (struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE); + if (eh == NULL) + continue; + if (eh->elf.root.type != bfd_link_hash_defined + && eh->elf.root.type != bfd_link_hash_defweak) + continue; + + fh = defined_code_entry (eh); + if (fh != NULL) + { + sec = fh->elf.root.u.def.section; + sec->flags |= SEC_KEEP; + } + else if (get_opd_info (eh->elf.root.u.def.section) != NULL + && opd_entry_value (eh->elf.root.u.def.section, + eh->elf.root.u.def.value, + &sec, NULL, FALSE) != (bfd_vma) -1) + sec->flags |= SEC_KEEP; + + sec = eh->elf.root.u.def.section; + sec->flags |= SEC_KEEP; + } +} + +/* Mark sections containing dynamically referenced symbols. When + building shared libraries, we must assume that any visible symbol is + referenced. */ + +static bfd_boolean +ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf) +{ + struct bfd_link_info *info = (struct bfd_link_info *) inf; + struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; + struct ppc_link_hash_entry *fdh; + + /* Dynamic linking info is on the func descriptor sym. */ + fdh = defined_func_desc (eh); + if (fdh != NULL) + eh = fdh; + + if ((eh->elf.root.type == bfd_link_hash_defined + || eh->elf.root.type == bfd_link_hash_defweak) + && (eh->elf.ref_dynamic + || (!info->executable + && eh->elf.def_regular + && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL + && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN + && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL + || !bfd_hide_sym_by_version (info->version_info, + eh->elf.root.root.string))))) + { + asection *code_sec; + struct ppc_link_hash_entry *fh; + + eh->elf.root.u.def.section->flags |= SEC_KEEP; + + /* Function descriptor syms cause the associated + function code sym section to be marked. */ + fh = defined_code_entry (eh); + if (fh != NULL) + { + code_sec = fh->elf.root.u.def.section; + code_sec->flags |= SEC_KEEP; + } + else if (get_opd_info (eh->elf.root.u.def.section) != NULL + && opd_entry_value (eh->elf.root.u.def.section, + eh->elf.root.u.def.value, + &code_sec, NULL, FALSE) != (bfd_vma) -1) + code_sec->flags |= SEC_KEEP; + } + + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +ppc64_elf_gc_mark_hook (asection *sec, + struct bfd_link_info *info, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + asection *rsec; + + /* Syms return NULL if we're marking .opd, so we avoid marking all + function sections, as all functions are referenced in .opd. */ + rsec = NULL; + if (get_opd_info (sec) != NULL) + return rsec; + + if (h != NULL) + { + enum elf_ppc64_reloc_type r_type; + struct ppc_link_hash_entry *eh, *fh, *fdh; + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + case R_PPC64_GNU_VTINHERIT: + case R_PPC64_GNU_VTENTRY: + break; + + default: + switch (h->root.type) + { + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + eh = (struct ppc_link_hash_entry *) h; + fdh = defined_func_desc (eh); + if (fdh != NULL) + eh = fdh; + + /* Function descriptor syms cause the associated + function code sym section to be marked. */ + fh = defined_code_entry (eh); + if (fh != NULL) + { + /* They also mark their opd section. */ + eh->elf.root.u.def.section->gc_mark = 1; + + rsec = fh->elf.root.u.def.section; + } + else if (get_opd_info (eh->elf.root.u.def.section) != NULL + && opd_entry_value (eh->elf.root.u.def.section, + eh->elf.root.u.def.value, + &rsec, NULL, FALSE) != (bfd_vma) -1) + eh->elf.root.u.def.section->gc_mark = 1; + else + rsec = h->root.u.def.section; + break; + + case bfd_link_hash_common: + rsec = h->root.u.c.p->section; + break; + + default: + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); + } + } + } + else + { + struct _opd_sec_data *opd; + + rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); + opd = get_opd_info (rsec); + if (opd != NULL && opd->func_sec != NULL) + { + rsec->gc_mark = 1; + + rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8]; + } + } + + return rsec; +} + +/* Update the .got, .plt. and dynamic reloc reference counts for the + section being removed. */ + +static bfd_boolean +ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + struct ppc_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + struct got_entry **local_got_ents; + const Elf_Internal_Rela *rel, *relend; + + if (info->relocatable) + return TRUE; + + if ((sec->flags & SEC_ALLOC) == 0) + return TRUE; + + elf_section_data (sec)->local_dynrel = NULL; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + symtab_hdr = &elf_symtab_hdr (abfd); + sym_hashes = elf_sym_hashes (abfd); + local_got_ents = elf_local_got_ents (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + enum elf_ppc64_reloc_type r_type; + struct elf_link_hash_entry *h = NULL; + unsigned char tls_type = 0; + + r_symndx = ELF64_R_SYM (rel->r_info); + r_type = ELF64_R_TYPE (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + struct ppc_link_hash_entry *eh; + struct elf_dyn_relocs **pp; + struct elf_dyn_relocs *p; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + h = elf_follow_link (h); + eh = (struct ppc_link_hash_entry *) h; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) + if (p->sec == sec) + { + /* Everything must go for SEC. */ + *pp = p->next; + break; + } + } + + if (is_branch_reloc (r_type)) + { + struct plt_entry **ifunc = NULL; + if (h != NULL) + { + if (h->type == STT_GNU_IFUNC) + ifunc = &h->plt.plist; + } + else if (local_got_ents != NULL) + { + struct plt_entry **local_plt = (struct plt_entry **) + (local_got_ents + symtab_hdr->sh_info); + unsigned char *local_got_tls_masks = (unsigned char *) + (local_plt + symtab_hdr->sh_info); + if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) + ifunc = local_plt + r_symndx; + } + if (ifunc != NULL) + { + struct plt_entry *ent; + + for (ent = *ifunc; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend) + break; + if (ent == NULL) + abort (); + if (ent->plt.refcount > 0) + ent->plt.refcount -= 1; + continue; + } + } + + switch (r_type) + { + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + tls_type = TLS_TLS | TLS_LD; + goto dogot; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogot; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + tls_type = TLS_TLS | TLS_TPREL; + goto dogot; + + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + goto dogot; + + case R_PPC64_GOT16: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_LO_DS: + dogot: + { + struct got_entry *ent; + + if (h != NULL) + ent = h->got.glist; + else + ent = local_got_ents[r_symndx]; + + for (; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == abfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + abort (); + if (ent->got.refcount > 0) + ent->got.refcount -= 1; + } + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL24: + if (h != NULL) + { + struct plt_entry *ent; + + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend) + break; + if (ent != NULL && ent->plt.refcount > 0) + ent->plt.refcount -= 1; + } + break; + + default: + break; + } + } + return TRUE; +} + +/* The maximum size of .sfpr. */ +#define SFPR_MAX (218*4) + +struct sfpr_def_parms +{ + const char name[12]; + unsigned char lo, hi; + bfd_byte * (*write_ent) (bfd *, bfd_byte *, int); + bfd_byte * (*write_tail) (bfd *, bfd_byte *, int); +}; + +/* Auto-generate _save*, _rest* functions in .sfpr. */ + +static bfd_boolean +sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + unsigned int i; + size_t len = strlen (parm->name); + bfd_boolean writing = FALSE; + char sym[16]; + + if (htab == NULL) + return FALSE; + + memcpy (sym, parm->name, len); + sym[len + 2] = 0; + + for (i = parm->lo; i <= parm->hi; i++) + { + struct elf_link_hash_entry *h; + + sym[len + 0] = i / 10 + '0'; + sym[len + 1] = i % 10 + '0'; + h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); + if (h != NULL + && !h->def_regular) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = htab->sfpr; + h->root.u.def.value = htab->sfpr->size; + h->type = STT_FUNC; + h->def_regular = 1; + _bfd_elf_link_hash_hide_symbol (info, h, TRUE); + writing = TRUE; + if (htab->sfpr->contents == NULL) + { + htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX); + if (htab->sfpr->contents == NULL) + return FALSE; + } + } + if (writing) + { + bfd_byte *p = htab->sfpr->contents + htab->sfpr->size; + if (i != parm->hi) + p = (*parm->write_ent) (htab->elf.dynobj, p, i); + else + p = (*parm->write_tail) (htab->elf.dynobj, p, i); + htab->sfpr->size = p - htab->sfpr->contents; + } + } + + return TRUE; +} + +static bfd_byte * +savegpr0 (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); + return p + 4; +} + +static bfd_byte * +savegpr0_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = savegpr0 (abfd, p, r); + bfd_put_32 (abfd, STD_R0_0R1 + 16, p); + p = p + 4; + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +restgpr0 (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); + return p + 4; +} + +static bfd_byte * +restgpr0_tail (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LD_R0_0R1 + 16, p); + p = p + 4; + p = restgpr0 (abfd, p, r); + bfd_put_32 (abfd, MTLR_R0, p); + p = p + 4; + if (r == 29) + { + p = restgpr0 (abfd, p, 30); + p = restgpr0 (abfd, p, 31); + } + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +savegpr1 (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); + return p + 4; +} + +static bfd_byte * +savegpr1_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = savegpr1 (abfd, p, r); + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +restgpr1 (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); + return p + 4; +} + +static bfd_byte * +restgpr1_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = restgpr1 (abfd, p, r); + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +savefpr (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); + return p + 4; +} + +static bfd_byte * +savefpr0_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = savefpr (abfd, p, r); + bfd_put_32 (abfd, STD_R0_0R1 + 16, p); + p = p + 4; + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +restfpr (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); + return p + 4; +} + +static bfd_byte * +restfpr0_tail (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LD_R0_0R1 + 16, p); + p = p + 4; + p = restfpr (abfd, p, r); + bfd_put_32 (abfd, MTLR_R0, p); + p = p + 4; + if (r == 29) + { + p = restfpr (abfd, p, 30); + p = restfpr (abfd, p, 31); + } + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +savefpr1_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = savefpr (abfd, p, r); + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +restfpr1_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = restfpr (abfd, p, r); + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +savevr (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); + p = p + 4; + bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p); + return p + 4; +} + +static bfd_byte * +savevr_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = savevr (abfd, p, r); + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +static bfd_byte * +restvr (bfd *abfd, bfd_byte *p, int r) +{ + bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); + p = p + 4; + bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p); + return p + 4; +} + +static bfd_byte * +restvr_tail (bfd *abfd, bfd_byte *p, int r) +{ + p = restvr (abfd, p, r); + bfd_put_32 (abfd, BLR, p); + return p + 4; +} + +/* Called via elf_link_hash_traverse to transfer dynamic linking + information on function code symbol entries to their corresponding + function descriptor symbol entries. */ + +static bfd_boolean +func_desc_adjust (struct elf_link_hash_entry *h, void *inf) +{ + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + struct plt_entry *ent; + struct ppc_link_hash_entry *fh; + struct ppc_link_hash_entry *fdh; + bfd_boolean force_local; + + fh = (struct ppc_link_hash_entry *) h; + if (fh->elf.root.type == bfd_link_hash_indirect) + return TRUE; + + info = inf; + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + /* Resolve undefined references to dot-symbols as the value + in the function descriptor, if we have one in a regular object. + This is to satisfy cases like ".quad .foo". Calls to functions + in dynamic objects are handled elsewhere. */ + if (fh->elf.root.type == bfd_link_hash_undefweak + && fh->was_undefined + && (fdh = defined_func_desc (fh)) != NULL + && get_opd_info (fdh->elf.root.u.def.section) != NULL + && opd_entry_value (fdh->elf.root.u.def.section, + fdh->elf.root.u.def.value, + &fh->elf.root.u.def.section, + &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1) + { + fh->elf.root.type = fdh->elf.root.type; + fh->elf.forced_local = 1; + fh->elf.def_regular = fdh->elf.def_regular; + fh->elf.def_dynamic = fdh->elf.def_dynamic; + } + + /* If this is a function code symbol, transfer dynamic linking + information to the function descriptor symbol. */ + if (!fh->is_func) + return TRUE; + + for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.refcount > 0) + break; + if (ent == NULL + || fh->elf.root.root.string[0] != '.' + || fh->elf.root.root.string[1] == '\0') + return TRUE; + + /* Find the corresponding function descriptor symbol. Create it + as undefined if necessary. */ + + fdh = lookup_fdh (fh, htab); + if (fdh == NULL + && !info->executable + && (fh->elf.root.type == bfd_link_hash_undefined + || fh->elf.root.type == bfd_link_hash_undefweak)) + { + fdh = make_fdh (info, fh); + if (fdh == NULL) + return FALSE; + } + + /* Fake function descriptors are made undefweak. If the function + code symbol is strong undefined, make the fake sym the same. + If the function code symbol is defined, then force the fake + descriptor local; We can't support overriding of symbols in a + shared library on a fake descriptor. */ + + if (fdh != NULL + && fdh->fake + && fdh->elf.root.type == bfd_link_hash_undefweak) + { + if (fh->elf.root.type == bfd_link_hash_undefined) + { + fdh->elf.root.type = bfd_link_hash_undefined; + bfd_link_add_undef (&htab->elf.root, &fdh->elf.root); + } + else if (fh->elf.root.type == bfd_link_hash_defined + || fh->elf.root.type == bfd_link_hash_defweak) + { + _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE); + } + } + + if (fdh != NULL + && !fdh->elf.forced_local + && (!info->executable + || fdh->elf.def_dynamic + || fdh->elf.ref_dynamic + || (fdh->elf.root.type == bfd_link_hash_undefweak + && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT))) + { + if (fdh->elf.dynindx == -1) + if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) + return FALSE; + fdh->elf.ref_regular |= fh->elf.ref_regular; + fdh->elf.ref_dynamic |= fh->elf.ref_dynamic; + fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak; + fdh->elf.non_got_ref |= fh->elf.non_got_ref; + if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT) + { + move_plt_plist (fh, fdh); + fdh->elf.needs_plt = 1; + } + fdh->is_func_descriptor = 1; + fdh->oh = fh; + fh->oh = fdh; + } + + /* Now that the info is on the function descriptor, clear the + function code sym info. Any function code syms for which we + don't have a definition in a regular file, we force local. + This prevents a shared library from exporting syms that have + been imported from another library. Function code syms that + are really in the library we must leave global to prevent the + linker dragging in a definition from a static library. */ + force_local = (!fh->elf.def_regular + || fdh == NULL + || !fdh->elf.def_regular + || fdh->elf.forced_local); + _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); + + return TRUE; +} + +/* Called near the start of bfd_elf_size_dynamic_sections. We use + this hook to a) provide some gcc support functions, and b) transfer + dynamic linking information gathered so far on function code symbol + entries, to their corresponding function descriptor symbol entries. */ + +static bfd_boolean +ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + unsigned int i; + static const struct sfpr_def_parms funcs[] = + { + { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail }, + { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail }, + { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail }, + { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail }, + { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail }, + { "_savefpr_", 14, 31, savefpr, savefpr0_tail }, + { "_restfpr_", 14, 29, restfpr, restfpr0_tail }, + { "_restfpr_", 30, 31, restfpr, restfpr0_tail }, + { "._savef", 14, 31, savefpr, savefpr1_tail }, + { "._restf", 14, 31, restfpr, restfpr1_tail }, + { "_savevr_", 20, 31, savevr, savevr_tail }, + { "_restvr_", 20, 31, restvr, restvr_tail } + }; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + if (!info->relocatable + && htab->elf.hgot != NULL) + _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE); + + if (htab->sfpr == NULL) + /* We don't have any relocs. */ + return TRUE; + + /* Provide any missing _save* and _rest* functions. */ + htab->sfpr->size = 0; + if (!info->relocatable) + for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++) + if (!sfpr_define (info, &funcs[i])) + return FALSE; + + elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); + + if (htab->sfpr->size == 0) + htab->sfpr->flags |= SEC_EXCLUDE; + + return TRUE; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static bfd_boolean +ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + struct ppc_link_hash_table *htab; + asection *s; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + /* Deal with function syms. */ + if (h->type == STT_FUNC + || h->type == STT_GNU_IFUNC + || h->needs_plt) + { + /* Clear procedure linkage table information for any symbol that + won't need a .plt entry. */ + struct plt_entry *ent; + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.refcount > 0) + break; + if (ent == NULL + || (h->type != STT_GNU_IFUNC + && (SYMBOL_CALLS_LOCAL (info, h) + || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak)))) + { + h->plt.plist = NULL; + h->needs_plt = 0; + } + } + else + h->plt.plist = NULL; + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->u.weakdef != NULL) + { + BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined + || h->u.weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->u.weakdef->root.u.def.section; + h->root.u.def.value = h->u.weakdef->root.u.def.value; + if (ELIMINATE_COPY_RELOCS) + h->non_got_ref = h->u.weakdef->non_got_ref; + return TRUE; + } + + /* If we are creating a shared library, we must presume that the + only references to the symbol are via the global offset table. + For such cases we need not do anything here; the relocations will + be handled correctly by relocate_section. */ + if (info->shared) + return TRUE; + + /* If there are no references to this symbol that do not use the + GOT, we don't need to generate a copy reloc. */ + if (!h->non_got_ref) + return TRUE; + + /* Don't generate a copy reloc for symbols defined in the executable. */ + if (!h->def_dynamic || !h->ref_regular || h->def_regular) + return TRUE; + + if (ELIMINATE_COPY_RELOCS) + { + struct ppc_link_hash_entry * eh; + struct elf_dyn_relocs *p; + + eh = (struct ppc_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + s = p->sec->output_section; + if (s != NULL && (s->flags & SEC_READONLY) != 0) + break; + } + + /* If we didn't find any dynamic relocs in read-only sections, then + we'll be keeping the dynamic relocs and avoiding the copy reloc. */ + if (p == NULL) + { + h->non_got_ref = 0; + return TRUE; + } + } + + if (h->plt.plist != NULL) + { + /* We should never get here, but unfortunately there are versions + of gcc out there that improperly (for this ABI) put initialized + function pointers, vtable refs and suchlike in read-only + sections. Allow them to proceed, but warn that this might + break at runtime. */ + info->callbacks->einfo + (_("%P: copy reloc against `%T' requires lazy plt linking; " + "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"), + h->root.root.string); + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ + + /* We must allocate the symbol in our .dynbss section, which will + become part of the .bss section of the executable. There will be + an entry for this symbol in the .dynsym section. The dynamic + object will contain position independent code, so all references + from the dynamic object to this symbol will go through the global + offset table. The dynamic linker will use the .dynsym entry to + determine the address it must put in the global offset table, so + both the dynamic object and the regular object will refer to the + same memory location for the variable. */ + + /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker + to copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) + { + htab->relbss->size += sizeof (Elf64_External_Rela); + h->needs_copy = 1; + } + + s = htab->dynbss; + + return _bfd_elf_adjust_dynamic_copy (h, s); +} + +/* If given a function descriptor symbol, hide both the function code + sym and the descriptor. */ +static void +ppc64_elf_hide_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h, + bfd_boolean force_local) +{ + struct ppc_link_hash_entry *eh; + _bfd_elf_link_hash_hide_symbol (info, h, force_local); + + eh = (struct ppc_link_hash_entry *) h; + if (eh->is_func_descriptor) + { + struct ppc_link_hash_entry *fh = eh->oh; + + if (fh == NULL) + { + const char *p, *q; + struct ppc_link_hash_table *htab; + char save; + + /* We aren't supposed to use alloca in BFD because on + systems which do not have alloca the version in libiberty + calls xmalloc, which might cause the program to crash + when it runs out of memory. This function doesn't have a + return status, so there's no way to gracefully return an + error. So cheat. We know that string[-1] can be safely + accessed; It's either a string in an ELF string table, + or allocated in an objalloc structure. */ + + p = eh->elf.root.root.string - 1; + save = *p; + *(char *) p = '.'; + htab = ppc_hash_table (info); + if (htab == NULL) + return; + + fh = (struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); + *(char *) p = save; + + /* Unfortunately, if it so happens that the string we were + looking for was allocated immediately before this string, + then we overwrote the string terminator. That's the only + reason the lookup should fail. */ + if (fh == NULL) + { + q = eh->elf.root.root.string + strlen (eh->elf.root.root.string); + while (q >= eh->elf.root.root.string && *q == *p) + --q, --p; + if (q < eh->elf.root.root.string && *p == '.') + fh = (struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); + } + if (fh != NULL) + { + eh->oh = fh; + fh->oh = eh; + } + } + if (fh != NULL) + _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); + } +} + +static bfd_boolean +get_sym_h (struct elf_link_hash_entry **hp, + Elf_Internal_Sym **symp, + asection **symsecp, + unsigned char **tls_maskp, + Elf_Internal_Sym **locsymsp, + unsigned long r_symndx, + bfd *ibfd) +{ + Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); + + if (r_symndx >= symtab_hdr->sh_info) + { + struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); + struct elf_link_hash_entry *h; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + h = elf_follow_link (h); + + if (hp != NULL) + *hp = h; + + if (symp != NULL) + *symp = NULL; + + if (symsecp != NULL) + { + asection *symsec = NULL; + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + symsec = h->root.u.def.section; + *symsecp = symsec; + } + + if (tls_maskp != NULL) + { + struct ppc_link_hash_entry *eh; + + eh = (struct ppc_link_hash_entry *) h; + *tls_maskp = &eh->tls_mask; + } + } + else + { + Elf_Internal_Sym *sym; + Elf_Internal_Sym *locsyms = *locsymsp; + + if (locsyms == NULL) + { + locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; + if (locsyms == NULL) + locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, + symtab_hdr->sh_info, + 0, NULL, NULL, NULL); + if (locsyms == NULL) + return FALSE; + *locsymsp = locsyms; + } + sym = locsyms + r_symndx; + + if (hp != NULL) + *hp = NULL; + + if (symp != NULL) + *symp = sym; + + if (symsecp != NULL) + *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); + + if (tls_maskp != NULL) + { + struct got_entry **lgot_ents; + unsigned char *tls_mask; + + tls_mask = NULL; + lgot_ents = elf_local_got_ents (ibfd); + if (lgot_ents != NULL) + { + struct plt_entry **local_plt = (struct plt_entry **) + (lgot_ents + symtab_hdr->sh_info); + unsigned char *lgot_masks = (unsigned char *) + (local_plt + symtab_hdr->sh_info); + tls_mask = &lgot_masks[r_symndx]; + } + *tls_maskp = tls_mask; + } + } + return TRUE; +} + +/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on + error, 2 on a toc GD type suitable for optimization, 3 on a toc LD + type suitable for optimization, and 1 otherwise. */ + +static int +get_tls_mask (unsigned char **tls_maskp, + unsigned long *toc_symndx, + bfd_vma *toc_addend, + Elf_Internal_Sym **locsymsp, + const Elf_Internal_Rela *rel, + bfd *ibfd) +{ + unsigned long r_symndx; + int next_r; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + asection *sec; + bfd_vma off; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) + return 0; + + if ((*tls_maskp != NULL && **tls_maskp != 0) + || sec == NULL + || ppc64_elf_section_data (sec) == NULL + || ppc64_elf_section_data (sec)->sec_type != sec_toc) + return 1; + + /* Look inside a TOC section too. */ + if (h != NULL) + { + BFD_ASSERT (h->root.type == bfd_link_hash_defined); + off = h->root.u.def.value; + } + else + off = sym->st_value; + off += rel->r_addend; + BFD_ASSERT (off % 8 == 0); + r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8]; + next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1]; + if (toc_symndx != NULL) + *toc_symndx = r_symndx; + if (toc_addend != NULL) + *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8]; + if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) + return 0; + if ((h == NULL || is_static_defined (h)) + && (next_r == -1 || next_r == -2)) + return 1 - next_r; + return 1; +} + +/* Find (or create) an entry in the tocsave hash table. */ + +static struct tocsave_entry * +tocsave_find (struct ppc_link_hash_table *htab, + enum insert_option insert, + Elf_Internal_Sym **local_syms, + const Elf_Internal_Rela *irela, + bfd *ibfd) +{ + unsigned long r_indx; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + struct tocsave_entry ent, *p; + hashval_t hash; + struct tocsave_entry **slot; + + r_indx = ELF64_R_SYM (irela->r_info); + if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd)) + return NULL; + if (ent.sec == NULL || ent.sec->output_section == NULL) + { + (*_bfd_error_handler) + (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation")); + return NULL; + } + + if (h != NULL) + ent.offset = h->root.u.def.value; + else + ent.offset = sym->st_value; + ent.offset += irela->r_addend; + + hash = tocsave_htab_hash (&ent); + slot = ((struct tocsave_entry **) + htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert)); + if (slot == NULL) + return NULL; + + if (*slot == NULL) + { + p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p)); + if (p == NULL) + return NULL; + *p = ent; + *slot = p; + } + return *slot; +} + +/* Adjust all global syms defined in opd sections. In gcc generated + code for the old ABI, these will already have been done. */ + +static bfd_boolean +adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) +{ + struct ppc_link_hash_entry *eh; + asection *sym_sec; + struct _opd_sec_data *opd; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + return TRUE; + + eh = (struct ppc_link_hash_entry *) h; + if (eh->adjust_done) + return TRUE; + + sym_sec = eh->elf.root.u.def.section; + opd = get_opd_info (sym_sec); + if (opd != NULL && opd->adjust != NULL) + { + long adjust = opd->adjust[eh->elf.root.u.def.value / 8]; + if (adjust == -1) + { + /* This entry has been deleted. */ + asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section; + if (dsec == NULL) + { + for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next) + if (discarded_section (dsec)) + { + ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec; + break; + } + } + eh->elf.root.u.def.value = 0; + eh->elf.root.u.def.section = dsec; + } + else + eh->elf.root.u.def.value += adjust; + eh->adjust_done = 1; + } + return TRUE; +} + +/* Handles decrementing dynamic reloc counts for the reloc specified by + R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM + have already been determined. */ + +static bfd_boolean +dec_dynrel_count (bfd_vma r_info, + asection *sec, + struct bfd_link_info *info, + Elf_Internal_Sym **local_syms, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + enum elf_ppc64_reloc_type r_type; + asection *sym_sec = NULL; + + /* Can this reloc be dynamic? This switch, and later tests here + should be kept in sync with the code in check_relocs. */ + r_type = ELF64_R_TYPE (r_info); + switch (r_type) + { + default: + return TRUE; + + case R_PPC64_TPREL16: + case R_PPC64_TPREL16_LO: + case R_PPC64_TPREL16_HI: + case R_PPC64_TPREL16_HA: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + if (!info->shared) + return TRUE; + + case R_PPC64_TPREL64: + case R_PPC64_DTPMOD64: + case R_PPC64_DTPREL64: + case R_PPC64_ADDR64: + case R_PPC64_REL30: + case R_PPC64_REL32: + case R_PPC64_REL64: + case R_PPC64_ADDR14: + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_ADDR16: + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_HA: + case R_PPC64_ADDR16_HI: + case R_PPC64_ADDR16_HIGHER: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHEST: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_ADDR16_LO: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_ADDR24: + case R_PPC64_ADDR32: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + case R_PPC64_TOC: + break; + } + + if (local_syms != NULL) + { + unsigned long r_symndx; + bfd *ibfd = sec->owner; + + r_symndx = ELF64_R_SYM (r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd)) + return FALSE; + } + + if ((info->shared + && (must_be_dyn_reloc (info, r_type) + || (h != NULL + && (!SYMBOLIC_BIND (info, h) + || h->root.type == bfd_link_hash_defweak + || !h->def_regular)))) + || (ELIMINATE_COPY_RELOCS + && !info->shared + && h != NULL + && (h->root.type == bfd_link_hash_defweak + || !h->def_regular))) + ; + else + return TRUE; + + if (h != NULL) + { + struct elf_dyn_relocs *p; + struct elf_dyn_relocs **pp; + pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs; + + /* elf_gc_sweep may have already removed all dyn relocs associated + with local syms for a given section. Also, symbol flags are + changed by elf_gc_sweep_symbol, confusing the test above. Don't + report a dynreloc miscount. */ + if (*pp == NULL && info->gc_sections) + return TRUE; + + while ((p = *pp) != NULL) + { + if (p->sec == sec) + { + if (!must_be_dyn_reloc (info, r_type)) + p->pc_count -= 1; + p->count -= 1; + if (p->count == 0) + *pp = p->next; + return TRUE; + } + pp = &p->next; + } + } + else + { + struct ppc_dyn_relocs *p; + struct ppc_dyn_relocs **pp; + void *vpp; + bfd_boolean is_ifunc; + + if (local_syms == NULL) + sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); + if (sym_sec == NULL) + sym_sec = sec; + + vpp = &elf_section_data (sym_sec)->local_dynrel; + pp = (struct ppc_dyn_relocs **) vpp; + + if (*pp == NULL && info->gc_sections) + return TRUE; + + is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC; + while ((p = *pp) != NULL) + { + if (p->sec == sec && p->ifunc == is_ifunc) + { + p->count -= 1; + if (p->count == 0) + *pp = p->next; + return TRUE; + } + pp = &p->next; + } + } + + info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"), + sec->owner, sec); + bfd_set_error (bfd_error_bad_value); + return FALSE; +} + +/* Remove unused Official Procedure Descriptor entries. Currently we + only remove those associated with functions in discarded link-once + sections, or weakly defined functions that have been overridden. It + would be possible to remove many more entries for statically linked + applications. */ + +bfd_boolean +ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping) +{ + bfd *ibfd; + bfd_boolean some_edited = FALSE; + asection *need_pad = NULL; + + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + asection *sec; + Elf_Internal_Rela *relstart, *rel, *relend; + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Sym *local_syms; + bfd_vma offset; + struct _opd_sec_data *opd; + bfd_boolean need_edit, add_aux_fields; + bfd_size_type cnt_16b = 0; + + if (!is_ppc64_elf (ibfd)) + continue; + + sec = bfd_get_section_by_name (ibfd, ".opd"); + if (sec == NULL || sec->size == 0) + continue; + + if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) + continue; + + if (sec->output_section == bfd_abs_section_ptr) + continue; + + /* Look through the section relocs. */ + if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) + continue; + + local_syms = NULL; + symtab_hdr = &elf_symtab_hdr (ibfd); + + /* Read the relocations. */ + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return FALSE; + + /* First run through the relocs to check they are sane, and to + determine whether we need to edit this opd section. */ + need_edit = FALSE; + need_pad = sec; + offset = 0; + relend = relstart + sec->reloc_count; + for (rel = relstart; rel < relend; ) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + + /* .opd contains a regular array of 16 or 24 byte entries. We're + only interested in the reloc pointing to a function entry + point. */ + if (rel->r_offset != offset + || rel + 1 >= relend + || (rel + 1)->r_offset != offset + 8) + { + /* If someone messes with .opd alignment then after a + "ld -r" we might have padding in the middle of .opd. + Also, there's nothing to prevent someone putting + something silly in .opd with the assembler. No .opd + optimization for them! */ + broken_opd: + (*_bfd_error_handler) + (_("%B: .opd is not a regular array of opd entries"), ibfd); + need_edit = FALSE; + break; + } + + if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 + || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) + { + (*_bfd_error_handler) + (_("%B: unexpected reloc type %u in .opd section"), + ibfd, r_type); + need_edit = FALSE; + break; + } + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (sym_sec == NULL || sym_sec->owner == NULL) + { + const char *sym_name; + if (h != NULL) + sym_name = h->root.root.string; + else + sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym, + sym_sec); + + (*_bfd_error_handler) + (_("%B: undefined sym `%s' in .opd section"), + ibfd, sym_name); + need_edit = FALSE; + break; + } + + /* opd entries are always for functions defined in the + current input bfd. If the symbol isn't defined in the + input bfd, then we won't be using the function in this + bfd; It must be defined in a linkonce section in another + bfd, or is weak. It's also possible that we are + discarding the function due to a linker script /DISCARD/, + which we test for via the output_section. */ + if (sym_sec->owner != ibfd + || sym_sec->output_section == bfd_abs_section_ptr) + need_edit = TRUE; + + rel += 2; + if (rel == relend + || (rel + 1 == relend && rel->r_offset == offset + 16)) + { + if (sec->size == offset + 24) + { + need_pad = NULL; + break; + } + if (rel == relend && sec->size == offset + 16) + { + cnt_16b++; + break; + } + goto broken_opd; + } + + if (rel->r_offset == offset + 24) + offset += 24; + else if (rel->r_offset != offset + 16) + goto broken_opd; + else if (rel + 1 < relend + && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64 + && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC) + { + offset += 16; + cnt_16b++; + } + else if (rel + 2 < relend + && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64 + && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC) + { + offset += 24; + rel += 1; + } + else + goto broken_opd; + } + + add_aux_fields = non_overlapping && cnt_16b > 0; + + if (need_edit || add_aux_fields) + { + Elf_Internal_Rela *write_rel; + Elf_Internal_Shdr *rel_hdr; + bfd_byte *rptr, *wptr; + bfd_byte *new_contents; + bfd_boolean skip; + long opd_ent_size; + bfd_size_type amt; + + new_contents = NULL; + amt = sec->size * sizeof (long) / 8; + opd = &ppc64_elf_section_data (sec)->u.opd; + opd->adjust = bfd_zalloc (sec->owner, amt); + if (opd->adjust == NULL) + return FALSE; + ppc64_elf_section_data (sec)->sec_type = sec_opd; + + /* This seems a waste of time as input .opd sections are all + zeros as generated by gcc, but I suppose there's no reason + this will always be so. We might start putting something in + the third word of .opd entries. */ + if ((sec->flags & SEC_IN_MEMORY) == 0) + { + bfd_byte *loc; + if (!bfd_malloc_and_get_section (ibfd, sec, &loc)) + { + if (loc != NULL) + free (loc); + error_ret: + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + free (local_syms); + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + return FALSE; + } + sec->contents = loc; + sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); + } + + elf_section_data (sec)->relocs = relstart; + + new_contents = sec->contents; + if (add_aux_fields) + { + new_contents = bfd_malloc (sec->size + cnt_16b * 8); + if (new_contents == NULL) + return FALSE; + need_pad = FALSE; + } + wptr = new_contents; + rptr = sec->contents; + + write_rel = relstart; + skip = FALSE; + offset = 0; + opd_ent_size = 0; + for (rel = relstart; rel < relend; rel++) + { + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (rel->r_offset == offset) + { + struct ppc_link_hash_entry *fdh = NULL; + + /* See if the .opd entry is full 24 byte or + 16 byte (with fd_aux entry overlapped with next + fd_func). */ + opd_ent_size = 24; + if ((rel + 2 == relend && sec->size == offset + 16) + || (rel + 3 < relend + && rel[2].r_offset == offset + 16 + && rel[3].r_offset == offset + 24 + && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64 + && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC)) + opd_ent_size = 16; + + if (h != NULL + && h->root.root.string[0] == '.') + { + struct ppc_link_hash_table *htab; + + htab = ppc_hash_table (info); + if (htab != NULL) + fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, + htab); + if (fdh != NULL + && fdh->elf.root.type != bfd_link_hash_defined + && fdh->elf.root.type != bfd_link_hash_defweak) + fdh = NULL; + } + + skip = (sym_sec->owner != ibfd + || sym_sec->output_section == bfd_abs_section_ptr); + if (skip) + { + if (fdh != NULL && sym_sec->owner == ibfd) + { + /* Arrange for the function descriptor sym + to be dropped. */ + fdh->elf.root.u.def.value = 0; + fdh->elf.root.u.def.section = sym_sec; + } + opd->adjust[rel->r_offset / 8] = -1; + } + else + { + /* We'll be keeping this opd entry. */ + + if (fdh != NULL) + { + /* Redefine the function descriptor symbol to + this location in the opd section. It is + necessary to update the value here rather + than using an array of adjustments as we do + for local symbols, because various places + in the generic ELF code use the value + stored in u.def.value. */ + fdh->elf.root.u.def.value = wptr - new_contents; + fdh->adjust_done = 1; + } + + /* Local syms are a bit tricky. We could + tweak them as they can be cached, but + we'd need to look through the local syms + for the function descriptor sym which we + don't have at the moment. So keep an + array of adjustments. */ + opd->adjust[rel->r_offset / 8] + = (wptr - new_contents) - (rptr - sec->contents); + + if (wptr != rptr) + memcpy (wptr, rptr, opd_ent_size); + wptr += opd_ent_size; + if (add_aux_fields && opd_ent_size == 16) + { + memset (wptr, '\0', 8); + wptr += 8; + } + } + rptr += opd_ent_size; + offset += opd_ent_size; + } + + if (skip) + { + if (!NO_OPD_RELOCS + && !info->relocatable + && !dec_dynrel_count (rel->r_info, sec, info, + NULL, h, sym)) + goto error_ret; + } + else + { + /* We need to adjust any reloc offsets to point to the + new opd entries. While we're at it, we may as well + remove redundant relocs. */ + rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8]; + if (write_rel != rel) + memcpy (write_rel, rel, sizeof (*rel)); + ++write_rel; + } + } + + sec->size = wptr - new_contents; + sec->reloc_count = write_rel - relstart; + if (add_aux_fields) + { + free (sec->contents); + sec->contents = new_contents; + } + + /* Fudge the header size too, as this is used later in + elf_bfd_final_link if we are emitting relocs. */ + rel_hdr = _bfd_elf_single_rel_hdr (sec); + rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize; + some_edited = TRUE; + } + else if (elf_section_data (sec)->relocs != relstart) + free (relstart); + + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + { + if (!info->keep_memory) + free (local_syms); + else + symtab_hdr->contents = (unsigned char *) local_syms; + } + } + + if (some_edited) + elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); + + /* If we are doing a final link and the last .opd entry is just 16 byte + long, add a 8 byte padding after it. */ + if (need_pad != NULL && !info->relocatable) + { + bfd_byte *p; + + if ((need_pad->flags & SEC_IN_MEMORY) == 0) + { + BFD_ASSERT (need_pad->size > 0); + + p = bfd_malloc (need_pad->size + 8); + if (p == NULL) + return FALSE; + + if (! bfd_get_section_contents (need_pad->owner, need_pad, + p, 0, need_pad->size)) + return FALSE; + + need_pad->contents = p; + need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); + } + else + { + p = bfd_realloc (need_pad->contents, need_pad->size + 8); + if (p == NULL) + return FALSE; + + need_pad->contents = p; + } + + memset (need_pad->contents + need_pad->size, 0, 8); + need_pad->size += 8; + } + + return TRUE; +} + +/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ + +asection * +ppc64_elf_tls_setup (struct bfd_link_info *info, + int no_tls_get_addr_opt, + int *no_multi_toc) +{ + struct ppc_link_hash_table *htab; + + htab = ppc_hash_table (info); + if (htab == NULL) + return NULL; + + if (*no_multi_toc) + htab->do_multi_toc = 0; + else if (!htab->do_multi_toc) + *no_multi_toc = 1; + + htab->tls_get_addr = ((struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", + FALSE, FALSE, TRUE)); + /* Move dynamic linking info to the function descriptor sym. */ + if (htab->tls_get_addr != NULL) + func_desc_adjust (&htab->tls_get_addr->elf, info); + htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, "__tls_get_addr", + FALSE, FALSE, TRUE)); + if (!no_tls_get_addr_opt) + { + struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd; + + opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt", + FALSE, FALSE, TRUE); + if (opt != NULL) + func_desc_adjust (opt, info); + opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", + FALSE, FALSE, TRUE); + if (opt_fd != NULL + && (opt_fd->root.type == bfd_link_hash_defined + || opt_fd->root.type == bfd_link_hash_defweak)) + { + /* If glibc supports an optimized __tls_get_addr call stub, + signalled by the presence of __tls_get_addr_opt, and we'll + be calling __tls_get_addr via a plt call stub, then + make __tls_get_addr point to __tls_get_addr_opt. */ + tga_fd = &htab->tls_get_addr_fd->elf; + if (htab->elf.dynamic_sections_created + && tga_fd != NULL + && (tga_fd->type == STT_FUNC + || tga_fd->needs_plt) + && !(SYMBOL_CALLS_LOCAL (info, tga_fd) + || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT + && tga_fd->root.type == bfd_link_hash_undefweak))) + { + struct plt_entry *ent; + + for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.refcount > 0) + break; + if (ent != NULL) + { + tga_fd->root.type = bfd_link_hash_indirect; + tga_fd->root.u.i.link = &opt_fd->root; + ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd); + if (opt_fd->dynindx != -1) + { + /* Use __tls_get_addr_opt in dynamic relocations. */ + opt_fd->dynindx = -1; + _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, + opt_fd->dynstr_index); + if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd)) + return NULL; + } + htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd; + tga = &htab->tls_get_addr->elf; + if (opt != NULL && tga != NULL) + { + tga->root.type = bfd_link_hash_indirect; + tga->root.u.i.link = &opt->root; + ppc64_elf_copy_indirect_symbol (info, opt, tga); + _bfd_elf_link_hash_hide_symbol (info, opt, + tga->forced_local); + htab->tls_get_addr = (struct ppc_link_hash_entry *) opt; + } + htab->tls_get_addr_fd->oh = htab->tls_get_addr; + htab->tls_get_addr_fd->is_func_descriptor = 1; + if (htab->tls_get_addr != NULL) + { + htab->tls_get_addr->oh = htab->tls_get_addr_fd; + htab->tls_get_addr->is_func = 1; + } + } + } + } + else + no_tls_get_addr_opt = TRUE; + } + htab->no_tls_get_addr_opt = no_tls_get_addr_opt; + return _bfd_elf_tls_setup (info->output_bfd, info); +} + +/* Return TRUE iff REL is a branch reloc with a global symbol matching + HASH1 or HASH2. */ + +static bfd_boolean +branch_reloc_hash_match (const bfd *ibfd, + const Elf_Internal_Rela *rel, + const struct ppc_link_hash_entry *hash1, + const struct ppc_link_hash_entry *hash2) +{ + Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); + enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); + unsigned int r_symndx = ELF64_R_SYM (rel->r_info); + + if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) + { + struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); + struct elf_link_hash_entry *h; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + h = elf_follow_link (h); + if (h == &hash1->elf || h == &hash2->elf) + return TRUE; + } + return FALSE; +} + +/* Run through all the TLS relocs looking for optimization + opportunities. The linker has been hacked (see ppc64elf.em) to do + a preliminary section layout so that we know the TLS segment + offsets. We can't optimize earlier because some optimizations need + to know the tp offset, and we need to optimize before allocating + dynamic relocations. */ + +bfd_boolean +ppc64_elf_tls_optimize (struct bfd_link_info *info) +{ + bfd *ibfd; + asection *sec; + struct ppc_link_hash_table *htab; + unsigned char *toc_ref; + int pass; + + if (info->relocatable || !info->executable) + return TRUE; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + /* Make two passes over the relocs. On the first pass, mark toc + entries involved with tls relocs, and check that tls relocs + involved in setting up a tls_get_addr call are indeed followed by + such a call. If they are not, we can't do any tls optimization. + On the second pass twiddle tls_mask flags to notify + relocate_section that optimization can be done, and adjust got + and plt refcounts. */ + toc_ref = NULL; + for (pass = 0; pass < 2; ++pass) + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + Elf_Internal_Sym *locsyms = NULL; + asection *toc = bfd_get_section_by_name (ibfd, ".toc"); + + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) + { + Elf_Internal_Rela *relstart, *rel, *relend; + bfd_boolean found_tls_get_addr_arg = 0; + + /* Read the relocations. */ + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return FALSE; + + relend = relstart + sec->reloc_count; + for (rel = relstart; rel < relend; rel++) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + asection *sym_sec; + unsigned char *tls_mask; + unsigned char tls_set, tls_clear, tls_type = 0; + bfd_vma value; + bfd_boolean ok_tprel, is_local; + long toc_ref_index = 0; + int expecting_tls_get_addr = 0; + bfd_boolean ret = FALSE; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, + r_symndx, ibfd)) + { + err_free_rel: + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + if (toc_ref != NULL) + free (toc_ref); + if (locsyms != NULL + && (elf_symtab_hdr (ibfd).contents + != (unsigned char *) locsyms)) + free (locsyms); + return ret; + } + + if (h != NULL) + { + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + value = h->root.u.def.value; + else if (h->root.type == bfd_link_hash_undefweak) + value = 0; + else + { + found_tls_get_addr_arg = 0; + continue; + } + } + else + /* Symbols referenced by TLS relocs must be of type + STT_TLS. So no need for .opd local sym adjust. */ + value = sym->st_value; + + ok_tprel = FALSE; + is_local = FALSE; + if (h == NULL + || !h->def_dynamic) + { + is_local = TRUE; + if (h != NULL + && h->root.type == bfd_link_hash_undefweak) + ok_tprel = TRUE; + else + { + value += sym_sec->output_offset; + value += sym_sec->output_section->vma; + value -= htab->elf.tls_sec->vma; + ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) + < (bfd_vma) 1 << 32); + } + } + + r_type = ELF64_R_TYPE (rel->r_info); + /* If this section has old-style __tls_get_addr calls + without marker relocs, then check that each + __tls_get_addr call reloc is preceded by a reloc + that conceivably belongs to the __tls_get_addr arg + setup insn. If we don't find matching arg setup + relocs, don't do any tls optimization. */ + if (pass == 0 + && sec->has_tls_get_addr_call + && h != NULL + && (h == &htab->tls_get_addr->elf + || h == &htab->tls_get_addr_fd->elf) + && !found_tls_get_addr_arg + && is_branch_reloc (r_type)) + { + info->callbacks->minfo (_("%H __tls_get_addr lost arg, " + "TLS optimization disabled\n"), + ibfd, sec, rel->r_offset); + ret = TRUE; + goto err_free_rel; + } + + found_tls_get_addr_arg = 0; + switch (r_type) + { + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + expecting_tls_get_addr = 1; + found_tls_get_addr_arg = 1; + /* Fall thru */ + + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + /* These relocs should never be against a symbol + defined in a shared lib. Leave them alone if + that turns out to be the case. */ + if (!is_local) + continue; + + /* LD -> LE */ + tls_set = 0; + tls_clear = TLS_LD; + tls_type = TLS_TLS | TLS_LD; + break; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + expecting_tls_get_addr = 1; + found_tls_get_addr_arg = 1; + /* Fall thru */ + + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + if (ok_tprel) + /* GD -> LE */ + tls_set = 0; + else + /* GD -> IE */ + tls_set = TLS_TLS | TLS_TPRELGD; + tls_clear = TLS_GD; + tls_type = TLS_TLS | TLS_GD; + break; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + if (ok_tprel) + { + /* IE -> LE */ + tls_set = 0; + tls_clear = TLS_TPREL; + tls_type = TLS_TLS | TLS_TPREL; + break; + } + continue; + + case R_PPC64_TLSGD: + case R_PPC64_TLSLD: + found_tls_get_addr_arg = 1; + /* Fall thru */ + + case R_PPC64_TLS: + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + if (sym_sec == NULL || sym_sec != toc) + continue; + + /* Mark this toc entry as referenced by a TLS + code sequence. We can do that now in the + case of R_PPC64_TLS, and after checking for + tls_get_addr for the TOC16 relocs. */ + if (toc_ref == NULL) + toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8); + if (toc_ref == NULL) + goto err_free_rel; + + if (h != NULL) + value = h->root.u.def.value; + else + value = sym->st_value; + value += rel->r_addend; + BFD_ASSERT (value < toc->size && value % 8 == 0); + toc_ref_index = (value + toc->output_offset) / 8; + if (r_type == R_PPC64_TLS + || r_type == R_PPC64_TLSGD + || r_type == R_PPC64_TLSLD) + { + toc_ref[toc_ref_index] = 1; + continue; + } + + if (pass != 0 && toc_ref[toc_ref_index] == 0) + continue; + + tls_set = 0; + tls_clear = 0; + expecting_tls_get_addr = 2; + break; + + case R_PPC64_TPREL64: + if (pass == 0 + || sec != toc + || toc_ref == NULL + || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) + continue; + if (ok_tprel) + { + /* IE -> LE */ + tls_set = TLS_EXPLICIT; + tls_clear = TLS_TPREL; + break; + } + continue; + + case R_PPC64_DTPMOD64: + if (pass == 0 + || sec != toc + || toc_ref == NULL + || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) + continue; + if (rel + 1 < relend + && (rel[1].r_info + == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) + && rel[1].r_offset == rel->r_offset + 8) + { + if (ok_tprel) + /* GD -> LE */ + tls_set = TLS_EXPLICIT | TLS_GD; + else + /* GD -> IE */ + tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; + tls_clear = TLS_GD; + } + else + { + if (!is_local) + continue; + + /* LD -> LE */ + tls_set = TLS_EXPLICIT; + tls_clear = TLS_LD; + } + break; + + default: + continue; + } + + if (pass == 0) + { + if (!expecting_tls_get_addr + || !sec->has_tls_get_addr_call) + continue; + + if (rel + 1 < relend + && branch_reloc_hash_match (ibfd, rel + 1, + htab->tls_get_addr, + htab->tls_get_addr_fd)) + { + if (expecting_tls_get_addr == 2) + { + /* Check for toc tls entries. */ + unsigned char *toc_tls; + int retval; + + retval = get_tls_mask (&toc_tls, NULL, NULL, + &locsyms, + rel, ibfd); + if (retval == 0) + goto err_free_rel; + if (toc_tls != NULL) + { + if ((*toc_tls & (TLS_GD | TLS_LD)) != 0) + found_tls_get_addr_arg = 1; + if (retval > 1) + toc_ref[toc_ref_index] = 1; + } + } + continue; + } + + if (expecting_tls_get_addr != 1) + continue; + + /* Uh oh, we didn't find the expected call. We + could just mark this symbol to exclude it + from tls optimization but it's safer to skip + the entire optimization. */ + info->callbacks->minfo (_("%H arg lost __tls_get_addr, " + "TLS optimization disabled\n"), + ibfd, sec, rel->r_offset); + ret = TRUE; + goto err_free_rel; + } + + if (expecting_tls_get_addr && htab->tls_get_addr != NULL) + { + struct plt_entry *ent; + for (ent = htab->tls_get_addr->elf.plt.plist; + ent != NULL; + ent = ent->next) + if (ent->addend == 0) + { + if (ent->plt.refcount > 0) + { + ent->plt.refcount -= 1; + expecting_tls_get_addr = 0; + } + break; + } + } + + if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL) + { + struct plt_entry *ent; + for (ent = htab->tls_get_addr_fd->elf.plt.plist; + ent != NULL; + ent = ent->next) + if (ent->addend == 0) + { + if (ent->plt.refcount > 0) + ent->plt.refcount -= 1; + break; + } + } + + if (tls_clear == 0) + continue; + + if ((tls_set & TLS_EXPLICIT) == 0) + { + struct got_entry *ent; + + /* Adjust got entry for this reloc. */ + if (h != NULL) + ent = h->got.glist; + else + ent = elf_local_got_ents (ibfd)[r_symndx]; + + for (; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == ibfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + abort (); + + if (tls_set == 0) + { + /* We managed to get rid of a got entry. */ + if (ent->got.refcount > 0) + ent->got.refcount -= 1; + } + } + else + { + /* If we got rid of a DTPMOD/DTPREL reloc pair then + we'll lose one or two dyn relocs. */ + if (!dec_dynrel_count (rel->r_info, sec, info, + NULL, h, sym)) + return FALSE; + + if (tls_set == (TLS_EXPLICIT | TLS_GD)) + { + if (!dec_dynrel_count ((rel + 1)->r_info, sec, info, + NULL, h, sym)) + return FALSE; + } + } + + *tls_mask |= tls_set; + *tls_mask &= ~tls_clear; + } + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + } + + if (locsyms != NULL + && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms)) + { + if (!info->keep_memory) + free (locsyms); + else + elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms; + } + } + + if (toc_ref != NULL) + free (toc_ref); + return TRUE; +} + +/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust + the values of any global symbols in a toc section that has been + edited. Globals in toc sections should be a rarity, so this function + sets a flag if any are found in toc sections other than the one just + edited, so that futher hash table traversals can be avoided. */ + +struct adjust_toc_info +{ + asection *toc; + unsigned long *skip; + bfd_boolean global_toc_syms; +}; + +enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 }; + +static bfd_boolean +adjust_toc_syms (struct elf_link_hash_entry *h, void *inf) +{ + struct ppc_link_hash_entry *eh; + struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf; + unsigned long i; + + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + return TRUE; + + eh = (struct ppc_link_hash_entry *) h; + if (eh->adjust_done) + return TRUE; + + if (eh->elf.root.u.def.section == toc_inf->toc) + { + if (eh->elf.root.u.def.value > toc_inf->toc->rawsize) + i = toc_inf->toc->rawsize >> 3; + else + i = eh->elf.root.u.def.value >> 3; + + if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0) + { + (*_bfd_error_handler) + (_("%s defined on removed toc entry"), eh->elf.root.root.string); + do + ++i; + while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0); + eh->elf.root.u.def.value = (bfd_vma) i << 3; + } + + eh->elf.root.u.def.value -= toc_inf->skip[i]; + eh->adjust_done = 1; + } + else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0) + toc_inf->global_toc_syms = TRUE; + + return TRUE; +} + +/* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */ + +static bfd_boolean +ok_lo_toc_insn (unsigned int insn) +{ + return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ + || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ + || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ + || (insn & (0x3f << 26)) == 36u << 26 /* stw */ + || (insn & (0x3f << 26)) == 38u << 26 /* stb */ + || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ + || (insn & (0x3f << 26)) == 42u << 26 /* lha */ + || (insn & (0x3f << 26)) == 44u << 26 /* sth */ + || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ + || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ + || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ + || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ + || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ + || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ + || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ + && (insn & 3) != 1) + || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ + && ((insn & 3) == 0 || (insn & 3) == 3)) + || (insn & (0x3f << 26)) == 12u << 26 /* addic */); +} + +/* Examine all relocs referencing .toc sections in order to remove + unused .toc entries. */ + +bfd_boolean +ppc64_elf_edit_toc (struct bfd_link_info *info) +{ + bfd *ibfd; + struct adjust_toc_info toc_inf; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + htab->do_toc_opt = 1; + toc_inf.global_toc_syms = TRUE; + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + asection *toc, *sec; + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Sym *local_syms; + Elf_Internal_Rela *relstart, *rel, *toc_relocs; + unsigned long *skip, *drop; + unsigned char *used; + unsigned char *keep, last, some_unused; + + if (!is_ppc64_elf (ibfd)) + continue; + + toc = bfd_get_section_by_name (ibfd, ".toc"); + if (toc == NULL + || toc->size == 0 + || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS + || discarded_section (toc)) + continue; + + toc_relocs = NULL; + local_syms = NULL; + symtab_hdr = &elf_symtab_hdr (ibfd); + + /* Look at sections dropped from the final link. */ + skip = NULL; + relstart = NULL; + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + { + if (sec->reloc_count == 0 + || !discarded_section (sec) + || get_opd_info (sec) + || (sec->flags & SEC_ALLOC) == 0 + || (sec->flags & SEC_DEBUGGING) != 0) + continue; + + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE); + if (relstart == NULL) + goto error_ret; + + /* Run through the relocs to see which toc entries might be + unused. */ + for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + bfd_vma val; + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + default: + continue; + + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_HA: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + break; + } + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (sym_sec != toc) + continue; + + if (h != NULL) + val = h->root.u.def.value; + else + val = sym->st_value; + val += rel->r_addend; + + if (val >= toc->size) + continue; + + /* Anything in the toc ought to be aligned to 8 bytes. + If not, don't mark as unused. */ + if (val & 7) + continue; + + if (skip == NULL) + { + skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); + if (skip == NULL) + goto error_ret; + } + + skip[val >> 3] = ref_from_discarded; + } + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + } + + /* For largetoc loads of address constants, we can convert + . addis rx,2,addr@got@ha + . ld ry,addr@got@l(rx) + to + . addis rx,2,addr@toc@ha + . addi ry,rx,addr@toc@l + when addr is within 2G of the toc pointer. This then means + that the word storing "addr" in the toc is no longer needed. */ + + if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc + && toc->output_section->rawsize < (bfd_vma) 1 << 31 + && toc->reloc_count != 0) + { + /* Read toc relocs. */ + toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, + info->keep_memory); + if (toc_relocs == NULL) + goto error_ret; + + for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + bfd_vma val, addr; + + r_type = ELF64_R_TYPE (rel->r_info); + if (r_type != R_PPC64_ADDR64) + continue; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (sym_sec == NULL + || discarded_section (sym_sec)) + continue; + + if (!SYMBOL_CALLS_LOCAL (info, h)) + continue; + + if (h != NULL) + { + if (h->type == STT_GNU_IFUNC) + continue; + val = h->root.u.def.value; + } + else + { + if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) + continue; + val = sym->st_value; + } + val += rel->r_addend; + val += sym_sec->output_section->vma + sym_sec->output_offset; + + /* We don't yet know the exact toc pointer value, but we + know it will be somewhere in the toc section. Don't + optimize if the difference from any possible toc + pointer is outside [ff..f80008000, 7fff7fff]. */ + addr = toc->output_section->vma + TOC_BASE_OFF; + if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) + continue; + + addr = toc->output_section->vma + toc->output_section->rawsize; + if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) + continue; + + if (skip == NULL) + { + skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); + if (skip == NULL) + goto error_ret; + } + + skip[rel->r_offset >> 3] + |= can_optimize | ((rel - toc_relocs) << 2); + } + } + + if (skip == NULL) + continue; + + used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8); + if (used == NULL) + { + error_ret: + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + free (local_syms); + if (sec != NULL + && relstart != NULL + && elf_section_data (sec)->relocs != relstart) + free (relstart); + if (toc_relocs != NULL + && elf_section_data (toc)->relocs != toc_relocs) + free (toc_relocs); + if (skip != NULL) + free (skip); + return FALSE; + } + + /* Now check all kept sections that might reference the toc. + Check the toc itself last. */ + for (sec = (ibfd->sections == toc && toc->next ? toc->next + : ibfd->sections); + sec != NULL; + sec = (sec == toc ? NULL + : sec->next == NULL ? toc + : sec->next == toc && toc->next ? toc->next + : sec->next)) + { + int repeat; + + if (sec->reloc_count == 0 + || discarded_section (sec) + || get_opd_info (sec) + || (sec->flags & SEC_ALLOC) == 0 + || (sec->flags & SEC_DEBUGGING) != 0) + continue; + + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + goto error_ret; + + /* Mark toc entries referenced as used. */ + do + { + repeat = 0; + for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + bfd_vma val; + enum {no_check, check_lo, check_ha} insn_check; + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + default: + insn_check = no_check; + break; + + case R_PPC64_GOT_TLSLD16_HA: + case R_PPC64_GOT_TLSGD16_HA: + case R_PPC64_GOT_TPREL16_HA: + case R_PPC64_GOT_DTPREL16_HA: + case R_PPC64_GOT16_HA: + case R_PPC64_TOC16_HA: + insn_check = check_ha; + break; + + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_LO_DS: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_LO_DS: + insn_check = check_lo; + break; + } + + if (insn_check != no_check) + { + bfd_vma off = rel->r_offset & ~3; + unsigned char buf[4]; + unsigned int insn; + + if (!bfd_get_section_contents (ibfd, sec, buf, off, 4)) + { + free (used); + goto error_ret; + } + insn = bfd_get_32 (ibfd, buf); + if (insn_check == check_lo + ? !ok_lo_toc_insn (insn) + : ((insn & ((0x3f << 26) | 0x1f << 16)) + != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) + { + char str[12]; + + ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1; + sprintf (str, "%#08x", insn); + info->callbacks->einfo + (_("%P: %H: toc optimization is not supported for" + " %s instruction.\n"), + ibfd, sec, rel->r_offset & ~3, str); + } + } + + switch (r_type) + { + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_HA: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + /* In case we're taking addresses of toc entries. */ + case R_PPC64_ADDR64: + break; + + default: + continue; + } + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + { + free (used); + goto error_ret; + } + + if (sym_sec != toc) + continue; + + if (h != NULL) + val = h->root.u.def.value; + else + val = sym->st_value; + val += rel->r_addend; + + if (val >= toc->size) + continue; + + if ((skip[val >> 3] & can_optimize) != 0) + { + bfd_vma off; + unsigned char opc; + + switch (r_type) + { + case R_PPC64_TOC16_HA: + break; + + case R_PPC64_TOC16_LO_DS: + off = rel->r_offset; + off += (bfd_big_endian (ibfd) ? -2 : 3); + if (!bfd_get_section_contents (ibfd, sec, &opc, + off, 1)) + { + free (used); + goto error_ret; + } + if ((opc & (0x3f << 2)) == (58u << 2)) + break; + /* Fall thru */ + + default: + /* Wrong sort of reloc, or not a ld. We may + as well clear ref_from_discarded too. */ + skip[val >> 3] = 0; + } + } + + if (sec != toc) + used[val >> 3] = 1; + /* For the toc section, we only mark as used if this + entry itself isn't unused. */ + else if ((used[rel->r_offset >> 3] + || !(skip[rel->r_offset >> 3] & ref_from_discarded)) + && !used[val >> 3]) + { + /* Do all the relocs again, to catch reference + chains. */ + repeat = 1; + used[val >> 3] = 1; + } + } + } + while (repeat); + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + } + + /* Merge the used and skip arrays. Assume that TOC + doublewords not appearing as either used or unused belong + to to an entry more than one doubleword in size. */ + for (drop = skip, keep = used, last = 0, some_unused = 0; + drop < skip + (toc->size + 7) / 8; + ++drop, ++keep) + { + if (*keep) + { + *drop &= ~ref_from_discarded; + if ((*drop & can_optimize) != 0) + some_unused = 1; + last = 0; + } + else if ((*drop & ref_from_discarded) != 0) + { + some_unused = 1; + last = ref_from_discarded; + } + else + *drop = last; + } + + free (used); + + if (some_unused) + { + bfd_byte *contents, *src; + unsigned long off; + Elf_Internal_Sym *sym; + bfd_boolean local_toc_syms = FALSE; + + /* Shuffle the toc contents, and at the same time convert the + skip array from booleans into offsets. */ + if (!bfd_malloc_and_get_section (ibfd, toc, &contents)) + goto error_ret; + + elf_section_data (toc)->this_hdr.contents = contents; + + for (src = contents, off = 0, drop = skip; + src < contents + toc->size; + src += 8, ++drop) + { + if ((*drop & (can_optimize | ref_from_discarded)) != 0) + off += 8; + else if (off != 0) + { + *drop = off; + memcpy (src - off, src, 8); + } + } + *drop = off; + toc->rawsize = toc->size; + toc->size = src - contents - off; + + /* Adjust addends for relocs against the toc section sym, + and optimize any accesses we can. */ + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + { + if (sec->reloc_count == 0 + || discarded_section (sec)) + continue; + + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + goto error_ret; + + for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + bfd_vma val; + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + default: + continue; + + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_HA: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + case R_PPC64_ADDR64: + break; + } + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (sym_sec != toc) + continue; + + if (h != NULL) + val = h->root.u.def.value; + else + { + val = sym->st_value; + if (val != 0) + local_toc_syms = TRUE; + } + + val += rel->r_addend; + + if (val > toc->rawsize) + val = toc->rawsize; + else if ((skip[val >> 3] & ref_from_discarded) != 0) + continue; + else if ((skip[val >> 3] & can_optimize) != 0) + { + Elf_Internal_Rela *tocrel + = toc_relocs + (skip[val >> 3] >> 2); + unsigned long tsym = ELF64_R_SYM (tocrel->r_info); + + switch (r_type) + { + case R_PPC64_TOC16_HA: + rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA); + break; + + case R_PPC64_TOC16_LO_DS: + rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT); + break; + + default: + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + ppc_howto_init (); + info->callbacks->einfo + (_("%P: %H: %s references " + "optimized away TOC entry\n"), + ibfd, sec, rel->r_offset, + ppc64_elf_howto_table[r_type]->name); + bfd_set_error (bfd_error_bad_value); + goto error_ret; + } + rel->r_addend = tocrel->r_addend; + elf_section_data (sec)->relocs = relstart; + continue; + } + + if (h != NULL || sym->st_value != 0) + continue; + + rel->r_addend -= skip[val >> 3]; + elf_section_data (sec)->relocs = relstart; + } + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + } + + /* We shouldn't have local or global symbols defined in the TOC, + but handle them anyway. */ + if (local_syms != NULL) + for (sym = local_syms; + sym < local_syms + symtab_hdr->sh_info; + ++sym) + if (sym->st_value != 0 + && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc) + { + unsigned long i; + + if (sym->st_value > toc->rawsize) + i = toc->rawsize >> 3; + else + i = sym->st_value >> 3; + + if ((skip[i] & (ref_from_discarded | can_optimize)) != 0) + { + if (local_toc_syms) + (*_bfd_error_handler) + (_("%s defined on removed toc entry"), + bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL)); + do + ++i; + while ((skip[i] & (ref_from_discarded | can_optimize))); + sym->st_value = (bfd_vma) i << 3; + } + + sym->st_value -= skip[i]; + symtab_hdr->contents = (unsigned char *) local_syms; + } + + /* Adjust any global syms defined in this toc input section. */ + if (toc_inf.global_toc_syms) + { + toc_inf.toc = toc; + toc_inf.skip = skip; + toc_inf.global_toc_syms = FALSE; + elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms, + &toc_inf); + } + + if (toc->reloc_count != 0) + { + Elf_Internal_Shdr *rel_hdr; + Elf_Internal_Rela *wrel; + bfd_size_type sz; + + /* Remove unused toc relocs, and adjust those we keep. */ + if (toc_relocs == NULL) + toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, + info->keep_memory); + if (toc_relocs == NULL) + goto error_ret; + + wrel = toc_relocs; + for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) + if ((skip[rel->r_offset >> 3] + & (ref_from_discarded | can_optimize)) == 0) + { + wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3]; + wrel->r_info = rel->r_info; + wrel->r_addend = rel->r_addend; + ++wrel; + } + else if (!dec_dynrel_count (rel->r_info, toc, info, + &local_syms, NULL, NULL)) + goto error_ret; + + elf_section_data (toc)->relocs = toc_relocs; + toc->reloc_count = wrel - toc_relocs; + rel_hdr = _bfd_elf_single_rel_hdr (toc); + sz = rel_hdr->sh_entsize; + rel_hdr->sh_size = toc->reloc_count * sz; + } + } + else if (toc_relocs != NULL + && elf_section_data (toc)->relocs != toc_relocs) + free (toc_relocs); + + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + { + if (!info->keep_memory) + free (local_syms); + else + symtab_hdr->contents = (unsigned char *) local_syms; + } + free (skip); + } + + return TRUE; +} + +/* Return true iff input section I references the TOC using + instructions limited to +/-32k offsets. */ + +bfd_boolean +ppc64_elf_has_small_toc_reloc (asection *i) +{ + return (is_ppc64_elf (i->owner) + && ppc64_elf_tdata (i->owner)->has_small_toc_reloc); +} + +/* Allocate space for one GOT entry. */ + +static void +allocate_got (struct elf_link_hash_entry *h, + struct bfd_link_info *info, + struct got_entry *gent) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + bfd_boolean dyn; + struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; + int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD) + ? 16 : 8); + int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD + ? 2 : 1) * sizeof (Elf64_External_Rela); + asection *got = ppc64_elf_tdata (gent->owner)->got; + + gent->got.offset = got->size; + got->size += entsize; + + dyn = htab->elf.dynamic_sections_created; + if (h->type == STT_GNU_IFUNC) + { + htab->reliplt->size += rentsize; + htab->got_reli_size += rentsize; + } + else if ((info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) + && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak)) + { + asection *relgot = ppc64_elf_tdata (gent->owner)->relgot; + relgot->size += rentsize; + } +} + +/* This function merges got entries in the same toc group. */ + +static void +merge_got_entries (struct got_entry **pent) +{ + struct got_entry *ent, *ent2; + + for (ent = *pent; ent != NULL; ent = ent->next) + if (!ent->is_indirect) + for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next) + if (!ent2->is_indirect + && ent2->addend == ent->addend + && ent2->tls_type == ent->tls_type + && elf_gp (ent2->owner) == elf_gp (ent->owner)) + { + ent2->is_indirect = TRUE; + ent2->got.ent = ent; + } +} + +/* Allocate space in .plt, .got and associated reloc sections for + dynamic relocs. */ + +static bfd_boolean +allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) +{ + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + asection *s; + struct ppc_link_hash_entry *eh; + struct elf_dyn_relocs *p; + struct got_entry **pgent, *gent; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + info = (struct bfd_link_info *) inf; + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + if ((htab->elf.dynamic_sections_created + && h->dynindx != -1 + && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) + || h->type == STT_GNU_IFUNC) + { + struct plt_entry *pent; + bfd_boolean doneone = FALSE; + for (pent = h->plt.plist; pent != NULL; pent = pent->next) + if (pent->plt.refcount > 0) + { + if (!htab->elf.dynamic_sections_created + || h->dynindx == -1) + { + s = htab->iplt; + pent->plt.offset = s->size; + s->size += PLT_ENTRY_SIZE; + s = htab->reliplt; + } + else + { + /* If this is the first .plt entry, make room for the special + first entry. */ + s = htab->plt; + if (s->size == 0) + s->size += PLT_INITIAL_ENTRY_SIZE; + + pent->plt.offset = s->size; + + /* Make room for this entry. */ + s->size += PLT_ENTRY_SIZE; + + /* Make room for the .glink code. */ + s = htab->glink; + if (s->size == 0) + s->size += GLINK_CALL_STUB_SIZE; + /* We need bigger stubs past index 32767. */ + if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4) + s->size += 4; + s->size += 2*4; + + /* We also need to make an entry in the .rela.plt section. */ + s = htab->relplt; + } + s->size += sizeof (Elf64_External_Rela); + doneone = TRUE; + } + else + pent->plt.offset = (bfd_vma) -1; + if (!doneone) + { + h->plt.plist = NULL; + h->needs_plt = 0; + } + } + else + { + h->plt.plist = NULL; + h->needs_plt = 0; + } + + eh = (struct ppc_link_hash_entry *) h; + /* Run through the TLS GD got entries first if we're changing them + to TPREL. */ + if ((eh->tls_mask & TLS_TPRELGD) != 0) + for (gent = h->got.glist; gent != NULL; gent = gent->next) + if (gent->got.refcount > 0 + && (gent->tls_type & TLS_GD) != 0) + { + /* This was a GD entry that has been converted to TPREL. If + there happens to be a TPREL entry we can use that one. */ + struct got_entry *ent; + for (ent = h->got.glist; ent != NULL; ent = ent->next) + if (ent->got.refcount > 0 + && (ent->tls_type & TLS_TPREL) != 0 + && ent->addend == gent->addend + && ent->owner == gent->owner) + { + gent->got.refcount = 0; + break; + } + + /* If not, then we'll be using our own TPREL entry. */ + if (gent->got.refcount != 0) + gent->tls_type = TLS_TLS | TLS_TPREL; + } + + /* Remove any list entry that won't generate a word in the GOT before + we call merge_got_entries. Otherwise we risk merging to empty + entries. */ + pgent = &h->got.glist; + while ((gent = *pgent) != NULL) + if (gent->got.refcount > 0) + { + if ((gent->tls_type & TLS_LD) != 0 + && !h->def_dynamic) + { + ppc64_tlsld_got (gent->owner)->got.refcount += 1; + *pgent = gent->next; + } + else + pgent = &gent->next; + } + else + *pgent = gent->next; + + if (!htab->do_multi_toc) + merge_got_entries (&h->got.glist); + + for (gent = h->got.glist; gent != NULL; gent = gent->next) + if (!gent->is_indirect) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic, + nor will all TLS symbols. */ + if (h->dynindx == -1 + && !h->forced_local + && h->type != STT_GNU_IFUNC + && htab->elf.dynamic_sections_created) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + if (!is_ppc64_elf (gent->owner)) + abort (); + + allocate_got (h, info, gent); + } + + if (eh->dyn_relocs == NULL + || (!htab->elf.dynamic_sections_created + && h->type != STT_GNU_IFUNC)) + return TRUE; + + /* In the shared -Bsymbolic case, discard space allocated for + dynamic pc-relative relocs against symbols which turn out to be + defined in regular objects. For the normal shared case, discard + space for relocs that have become local due to symbol visibility + changes. */ + + if (info->shared) + { + /* Relocs that use pc_count are those that appear on a call insn, + or certain REL relocs (see must_be_dyn_reloc) that can be + generated via assembly. We want calls to protected symbols to + resolve directly to the function rather than going via the plt. + If people want function pointer comparisons to work as expected + then they should avoid writing weird assembly. */ + if (SYMBOL_CALLS_LOCAL (info, h)) + { + struct elf_dyn_relocs **pp; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) + { + p->count -= p->pc_count; + p->pc_count = 0; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; + } + } + + /* Also discard relocs on undefined weak syms with non-default + visibility. */ + if (eh->dyn_relocs != NULL + && h->root.type == bfd_link_hash_undefweak) + { + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + eh->dyn_relocs = NULL; + + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + else if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + } + } + else if (h->type == STT_GNU_IFUNC) + { + if (!h->non_got_ref) + eh->dyn_relocs = NULL; + } + else if (ELIMINATE_COPY_RELOCS) + { + /* For the non-shared case, discard space for relocs against + symbols which turn out to need copy relocs or are not + dynamic. */ + + if (!h->non_got_ref + && !h->def_regular) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + /* If that succeeded, we know we'll be keeping all the + relocs. */ + if (h->dynindx != -1) + goto keep; + } + + eh->dyn_relocs = NULL; + + keep: ; + } + + /* Finally, allocate space. */ + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *sreloc = elf_section_data (p->sec)->sreloc; + if (eh->elf.type == STT_GNU_IFUNC) + sreloc = htab->reliplt; + sreloc->size += p->count * sizeof (Elf64_External_Rela); + } + + return TRUE; +} + +/* Find any dynamic relocs that apply to read-only sections. */ + +static bfd_boolean +readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) +{ + struct ppc_link_hash_entry *eh; + struct elf_dyn_relocs *p; + + eh = (struct ppc_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *s = p->sec->output_section; + + if (s != NULL && (s->flags & SEC_READONLY) != 0) + { + struct bfd_link_info *info = inf; + + info->flags |= DF_TEXTREL; + + /* Not an error, just cut short the traversal. */ + return FALSE; + } + } + return TRUE; +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + bfd *dynobj; + asection *s; + bfd_boolean relocs; + bfd *ibfd; + struct got_entry *first_tlsld; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + dynobj = htab->elf.dynobj; + if (dynobj == NULL) + abort (); + + if (htab->elf.dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (info->executable) + { + s = bfd_get_linker_section (dynobj, ".interp"); + if (s == NULL) + abort (); + s->size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + } + + /* Set up .got offsets for local syms, and space for local dynamic + relocs. */ + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + struct got_entry **lgot_ents; + struct got_entry **end_lgot_ents; + struct plt_entry **local_plt; + struct plt_entry **end_local_plt; + unsigned char *lgot_masks; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + + if (!is_ppc64_elf (ibfd)) + continue; + + for (s = ibfd->sections; s != NULL; s = s->next) + { + struct ppc_dyn_relocs *p; + + for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) + { + if (!bfd_is_abs_section (p->sec) + && bfd_is_abs_section (p->sec->output_section)) + { + /* Input section has been discarded, either because + it is a copy of a linkonce section or due to + linker script /DISCARD/, so we'll be discarding + the relocs too. */ + } + else if (p->count != 0) + { + asection *srel = elf_section_data (p->sec)->sreloc; + if (p->ifunc) + srel = htab->reliplt; + srel->size += p->count * sizeof (Elf64_External_Rela); + if ((p->sec->output_section->flags & SEC_READONLY) != 0) + info->flags |= DF_TEXTREL; + } + } + } + + lgot_ents = elf_local_got_ents (ibfd); + if (!lgot_ents) + continue; + + symtab_hdr = &elf_symtab_hdr (ibfd); + locsymcount = symtab_hdr->sh_info; + end_lgot_ents = lgot_ents + locsymcount; + local_plt = (struct plt_entry **) end_lgot_ents; + end_local_plt = local_plt + locsymcount; + lgot_masks = (unsigned char *) end_local_plt; + s = ppc64_elf_tdata (ibfd)->got; + for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) + { + struct got_entry **pent, *ent; + + pent = lgot_ents; + while ((ent = *pent) != NULL) + if (ent->got.refcount > 0) + { + if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) + { + ppc64_tlsld_got (ibfd)->got.refcount += 1; + *pent = ent->next; + } + else + { + unsigned int ent_size = 8; + unsigned int rel_size = sizeof (Elf64_External_Rela); + + ent->got.offset = s->size; + if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) + { + ent_size *= 2; + rel_size *= 2; + } + s->size += ent_size; + if ((*lgot_masks & PLT_IFUNC) != 0) + { + htab->reliplt->size += rel_size; + htab->got_reli_size += rel_size; + } + else if (info->shared) + { + asection *srel = ppc64_elf_tdata (ibfd)->relgot; + srel->size += rel_size; + } + pent = &ent->next; + } + } + else + *pent = ent->next; + } + + /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ + for (; local_plt < end_local_plt; ++local_plt) + { + struct plt_entry *ent; + + for (ent = *local_plt; ent != NULL; ent = ent->next) + if (ent->plt.refcount > 0) + { + s = htab->iplt; + ent->plt.offset = s->size; + s->size += PLT_ENTRY_SIZE; + + htab->reliplt->size += sizeof (Elf64_External_Rela); + } + else + ent->plt.offset = (bfd_vma) -1; + } + } + + /* Allocate global sym .plt and .got entries, and space for global + sym dynamic relocs. */ + elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); + + first_tlsld = NULL; + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + struct got_entry *ent; + + if (!is_ppc64_elf (ibfd)) + continue; + + ent = ppc64_tlsld_got (ibfd); + if (ent->got.refcount > 0) + { + if (!htab->do_multi_toc && first_tlsld != NULL) + { + ent->is_indirect = TRUE; + ent->got.ent = first_tlsld; + } + else + { + if (first_tlsld == NULL) + first_tlsld = ent; + s = ppc64_elf_tdata (ibfd)->got; + ent->got.offset = s->size; + ent->owner = ibfd; + s->size += 16; + if (info->shared) + { + asection *srel = ppc64_elf_tdata (ibfd)->relgot; + srel->size += sizeof (Elf64_External_Rela); + } + } + } + else + ent->got.offset = (bfd_vma) -1; + } + + /* We now have determined the sizes of the various dynamic sections. + Allocate memory for them. */ + relocs = FALSE; + for (s = dynobj->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; + + if (s == htab->brlt || s == htab->relbrlt) + /* These haven't been allocated yet; don't strip. */ + continue; + else if (s == htab->got + || s == htab->plt + || s == htab->iplt + || s == htab->glink + || s == htab->dynbss) + { + /* Strip this section if we don't need it; see the + comment below. */ + } + else if (s == htab->glink_eh_frame) + { + if (!bfd_is_abs_section (s->output_section)) + /* Not sized yet. */ + continue; + } + else if (CONST_STRNEQ (s->name, ".rela")) + { + if (s->size != 0) + { + if (s != htab->relplt) + relocs = TRUE; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; + } + } + else + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (s->size == 0) + { + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rela.bss and + .rela.plt. We must create both sections in + create_dynamic_sections, because they must be created + before the linker maps input sections to output + sections. The linker does that before + adjust_dynamic_symbol is called, and it is that + function which decides whether anything needs to go + into these sections. */ + s->flags |= SEC_EXCLUDE; + continue; + } + + if ((s->flags & SEC_HAS_CONTENTS) == 0) + continue; + + /* Allocate memory for the section contents. We use bfd_zalloc + here in case unused entries are not reclaimed before the + section's contents are written out. This should not happen, + but this way if it does we get a R_PPC64_NONE reloc in .rela + sections instead of garbage. + We also rely on the section contents being zero when writing + the GOT. */ + s->contents = bfd_zalloc (dynobj, s->size); + if (s->contents == NULL) + return FALSE; + } + + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + if (!is_ppc64_elf (ibfd)) + continue; + + s = ppc64_elf_tdata (ibfd)->got; + if (s != NULL && s != htab->got) + { + if (s->size == 0) + s->flags |= SEC_EXCLUDE; + else + { + s->contents = bfd_zalloc (ibfd, s->size); + if (s->contents == NULL) + return FALSE; + } + } + s = ppc64_elf_tdata (ibfd)->relgot; + if (s != NULL) + { + if (s->size == 0) + s->flags |= SEC_EXCLUDE; + else + { + s->contents = bfd_zalloc (ibfd, s->size); + if (s->contents == NULL) + return FALSE; + relocs = TRUE; + s->reloc_count = 0; + } + } + } + + if (htab->elf.dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in ppc64_elf_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (info->executable) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (htab->plt != NULL && htab->plt->size != 0) + { + if (!add_dynamic_entry (DT_PLTGOT, 0) + || !add_dynamic_entry (DT_PLTRELSZ, 0) + || !add_dynamic_entry (DT_PLTREL, DT_RELA) + || !add_dynamic_entry (DT_JMPREL, 0) + || !add_dynamic_entry (DT_PPC64_GLINK, 0)) + return FALSE; + } + + if (NO_OPD_RELOCS) + { + if (!add_dynamic_entry (DT_PPC64_OPD, 0) + || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) + return FALSE; + } + + if (!htab->no_tls_get_addr_opt + && htab->tls_get_addr_fd != NULL + && htab->tls_get_addr_fd->elf.plt.plist != NULL + && !add_dynamic_entry (DT_PPC64_TLSOPT, 0)) + return FALSE; + + if (relocs) + { + if (!add_dynamic_entry (DT_RELA, 0) + || !add_dynamic_entry (DT_RELASZ, 0) + || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) + return FALSE; + + /* If any dynamic relocs apply to a read-only section, + then we need a DT_TEXTREL entry. */ + if ((info->flags & DF_TEXTREL) == 0) + elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); + + if ((info->flags & DF_TEXTREL) != 0) + { + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } + } +#undef add_dynamic_entry + + return TRUE; +} + +/* Determine the type of stub needed, if any, for a call. */ + +static inline enum ppc_stub_type +ppc_type_of_stub (asection *input_sec, + const Elf_Internal_Rela *rel, + struct ppc_link_hash_entry **hash, + struct plt_entry **plt_ent, + bfd_vma destination) +{ + struct ppc_link_hash_entry *h = *hash; + bfd_vma location; + bfd_vma branch_offset; + bfd_vma max_branch_offset; + enum elf_ppc64_reloc_type r_type; + + if (h != NULL) + { + struct plt_entry *ent; + struct ppc_link_hash_entry *fdh = h; + if (h->oh != NULL + && h->oh->is_func_descriptor) + { + fdh = ppc_follow_link (h->oh); + *hash = fdh; + } + + for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->plt.offset != (bfd_vma) -1) + { + *plt_ent = ent; + return ppc_stub_plt_call; + } + + /* Here, we know we don't have a plt entry. If we don't have a + either a defined function descriptor or a defined entry symbol + in a regular object file, then it is pointless trying to make + any other type of stub. */ + if (!is_static_defined (&fdh->elf) + && !is_static_defined (&h->elf)) + return ppc_stub_none; + } + else if (elf_local_got_ents (input_sec->owner) != NULL) + { + Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner); + struct plt_entry **local_plt = (struct plt_entry **) + elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info; + unsigned long r_symndx = ELF64_R_SYM (rel->r_info); + + if (local_plt[r_symndx] != NULL) + { + struct plt_entry *ent; + + for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->plt.offset != (bfd_vma) -1) + { + *plt_ent = ent; + return ppc_stub_plt_call; + } + } + } + + /* Determine where the call point is. */ + location = (input_sec->output_offset + + input_sec->output_section->vma + + rel->r_offset); + + branch_offset = destination - location; + r_type = ELF64_R_TYPE (rel->r_info); + + /* Determine if a long branch stub is needed. */ + max_branch_offset = 1 << 25; + if (r_type != R_PPC64_REL24) + max_branch_offset = 1 << 15; + + if (branch_offset + max_branch_offset >= 2 * max_branch_offset) + /* We need a stub. Figure out whether a long_branch or plt_branch + is needed later. */ + return ppc_stub_long_branch; + + return ppc_stub_none; +} + +/* With power7 weakly ordered memory model, it is possible for ld.so + to update a plt entry in one thread and have another thread see a + stale zero toc entry. To avoid this we need some sort of acquire + barrier in the call stub. One solution is to make the load of the + toc word seem to appear to depend on the load of the function entry + word. Another solution is to test for r2 being zero, and branch to + the appropriate glink entry if so. + + . fake dep barrier compare + . ld 11,xxx(2) ld 11,xxx(2) + . mtctr 11 mtctr 11 + . xor 11,11,11 ld 2,xxx+8(2) + . add 2,2,11 cmpldi 2,0 + . ld 2,xxx+8(2) bnectr+ + . bctr b <glink_entry> + + The solution involving the compare turns out to be faster, so + that's what we use unless the branch won't reach. */ + +#define ALWAYS_USE_FAKE_DEP 0 +#define ALWAYS_EMIT_R2SAVE 0 + +#define PPC_LO(v) ((v) & 0xffff) +#define PPC_HI(v) (((v) >> 16) & 0xffff) +#define PPC_HA(v) PPC_HI ((v) + 0x8000) + +static inline unsigned int +plt_stub_size (struct ppc_link_hash_table *htab, + struct ppc_stub_hash_entry *stub_entry, + bfd_vma off) +{ + unsigned size = PLT_CALL_STUB_SIZE; + + if (!(ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save)) + size -= 4; + if (!htab->plt_static_chain) + size -= 4; + if (htab->plt_thread_safe) + size += 8; + if (PPC_HA (off) == 0) + size -= 4; + if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off)) + size += 4; + if (stub_entry->h != NULL + && (stub_entry->h == htab->tls_get_addr_fd + || stub_entry->h == htab->tls_get_addr) + && !htab->no_tls_get_addr_opt) + size += 13 * 4; + return size; +} + +/* If this stub would cross fewer 2**plt_stub_align boundaries if we align, + then return the padding needed to do so. */ +static inline unsigned int +plt_stub_pad (struct ppc_link_hash_table *htab, + struct ppc_stub_hash_entry *stub_entry, + bfd_vma plt_off) +{ + int stub_align = 1 << htab->plt_stub_align; + unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off); + bfd_vma stub_off = stub_entry->stub_sec->size; + + if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align) + > (stub_size & -stub_align)) + return stub_align - (stub_off & (stub_align - 1)); + return 0; +} + +/* Build a .plt call stub. */ + +static inline bfd_byte * +build_plt_stub (struct ppc_link_hash_table *htab, + struct ppc_stub_hash_entry *stub_entry, + bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) +{ + bfd *obfd = htab->stub_bfd; + bfd_boolean plt_static_chain = htab->plt_static_chain; + bfd_boolean plt_thread_safe = htab->plt_thread_safe; + bfd_boolean use_fake_dep = plt_thread_safe; + bfd_vma cmp_branch_off = 0; + + if (!ALWAYS_USE_FAKE_DEP + && plt_thread_safe + && !(stub_entry->h != NULL + && (stub_entry->h == htab->tls_get_addr_fd + || stub_entry->h == htab->tls_get_addr) + && !htab->no_tls_get_addr_opt)) + { + bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1; + bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE; + bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8; + bfd_vma to, from; + + if (pltindex > 32768) + glinkoff += (pltindex - 32768) * 4; + to = (glinkoff + + htab->glink->output_offset + + htab->glink->output_section->vma); + from = (p - stub_entry->stub_sec->contents + + 4 * (ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + + 4 * (PPC_HA (offset) != 0) + + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain) + != PPC_HA (offset)) + + 4 * (plt_static_chain != 0) + + 20 + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + cmp_branch_off = to - from; + use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); + } + + if (PPC_HA (offset) != 0) + { + if (r != NULL) + { + if (ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + r[0].r_offset += 4; + r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); + r[1].r_offset = r[0].r_offset + 4; + r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); + r[1].r_addend = r[0].r_addend; + if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) + { + r[2].r_offset = r[1].r_offset + 4; + r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO); + r[2].r_addend = r[0].r_addend; + } + else + { + r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep; + r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); + r[2].r_addend = r[0].r_addend + 8; + if (plt_static_chain) + { + r[3].r_offset = r[2].r_offset + 4; + r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); + r[3].r_addend = r[0].r_addend + 16; + } + } + } + if (ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; + bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; + bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; + if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) + { + bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4; + offset = 0; + } + bfd_put_32 (obfd, MTCTR_R11, p), p += 4; + if (use_fake_dep) + { + bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4; + bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4; + } + bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4; + if (plt_static_chain) + bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4; + } + else + { + if (r != NULL) + { + if (ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + r[0].r_offset += 4; + r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); + if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) + { + r[1].r_offset = r[0].r_offset + 4; + r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16); + r[1].r_addend = r[0].r_addend; + } + else + { + r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep; + r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); + r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain; + if (plt_static_chain) + { + r[2].r_offset = r[1].r_offset + 4; + r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); + r[2].r_addend = r[0].r_addend + 8; + } + } + } + if (ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; + bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4; + if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) + { + bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4; + offset = 0; + } + bfd_put_32 (obfd, MTCTR_R11, p), p += 4; + if (use_fake_dep) + { + bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4; + bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4; + } + if (plt_static_chain) + bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4; + bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4; + } + if (plt_thread_safe && !use_fake_dep) + { + bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4; + bfd_put_32 (obfd, BNECTR_P4, p), p += 4; + bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4; + } + else + bfd_put_32 (obfd, BCTR, p), p += 4; + return p; +} + +/* Build a special .plt call stub for __tls_get_addr. */ + +#define LD_R11_0R3 0xe9630000 +#define LD_R12_0R3 0xe9830000 +#define MR_R0_R3 0x7c601b78 +#define CMPDI_R11_0 0x2c2b0000 +#define ADD_R3_R12_R13 0x7c6c6a14 +#define BEQLR 0x4d820020 +#define MR_R3_R0 0x7c030378 +#define MFLR_R11 0x7d6802a6 +#define STD_R11_0R1 0xf9610000 +#define BCTRL 0x4e800421 +#define LD_R11_0R1 0xe9610000 +#define LD_R2_0R1 0xe8410000 +#define MTLR_R11 0x7d6803a6 + +static inline bfd_byte * +build_tls_get_addr_stub (struct ppc_link_hash_table *htab, + struct ppc_stub_hash_entry *stub_entry, + bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) +{ + bfd *obfd = htab->stub_bfd; + + bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4; + bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4; + bfd_put_32 (obfd, MR_R0_R3, p), p += 4; + bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4; + bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4; + bfd_put_32 (obfd, BEQLR, p), p += 4; + bfd_put_32 (obfd, MR_R3_R0, p), p += 4; + bfd_put_32 (obfd, MFLR_R11, p), p += 4; + bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4; + + if (r != NULL) + r[0].r_offset += 9 * 4; + p = build_plt_stub (htab, stub_entry, p, offset, r); + bfd_put_32 (obfd, BCTRL, p - 4); + + bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4; + bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4; + bfd_put_32 (obfd, MTLR_R11, p), p += 4; + bfd_put_32 (obfd, BLR, p), p += 4; + + return p; +} + +static Elf_Internal_Rela * +get_relocs (asection *sec, int count) +{ + Elf_Internal_Rela *relocs; + struct bfd_elf_section_data *elfsec_data; + + elfsec_data = elf_section_data (sec); + relocs = elfsec_data->relocs; + if (relocs == NULL) + { + bfd_size_type relsize; + relsize = sec->reloc_count * sizeof (*relocs); + relocs = bfd_alloc (sec->owner, relsize); + if (relocs == NULL) + return NULL; + elfsec_data->relocs = relocs; + elfsec_data->rela.hdr = bfd_zalloc (sec->owner, + sizeof (Elf_Internal_Shdr)); + if (elfsec_data->rela.hdr == NULL) + return NULL; + elfsec_data->rela.hdr->sh_size = (sec->reloc_count + * sizeof (Elf64_External_Rela)); + elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela); + sec->reloc_count = 0; + } + relocs += sec->reloc_count; + sec->reloc_count += count; + return relocs; +} + +static bfd_vma +get_r2off (struct bfd_link_info *info, + struct ppc_stub_hash_entry *stub_entry) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off; + + if (r2off == 0) + { + /* Support linking -R objects. Get the toc pointer from the + opd entry. */ + char buf[8]; + asection *opd = stub_entry->h->elf.root.u.def.section; + bfd_vma opd_off = stub_entry->h->elf.root.u.def.value; + + if (strcmp (opd->name, ".opd") != 0 + || opd->reloc_count != 0) + { + info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"), + stub_entry->h->elf.root.root.string); + bfd_set_error (bfd_error_bad_value); + return 0; + } + if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8)) + return 0; + r2off = bfd_get_64 (opd->owner, buf); + r2off -= elf_gp (info->output_bfd); + } + r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off; + return r2off; +} + +static bfd_boolean +ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) +{ + struct ppc_stub_hash_entry *stub_entry; + struct ppc_branch_hash_entry *br_entry; + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + bfd_byte *loc; + bfd_byte *p; + bfd_vma dest, off; + int size; + Elf_Internal_Rela *r; + asection *plt; + + /* Massage our args to the form they really have. */ + stub_entry = (struct ppc_stub_hash_entry *) gen_entry; + info = in_arg; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + /* Make a note of the offset within the stubs for this entry. */ + stub_entry->stub_offset = stub_entry->stub_sec->size; + loc = stub_entry->stub_sec->contents + stub_entry->stub_offset; + + htab->stub_count[stub_entry->stub_type - 1] += 1; + switch (stub_entry->stub_type) + { + case ppc_stub_long_branch: + case ppc_stub_long_branch_r2off: + /* Branches are relative. This is where we are going to. */ + off = dest = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + + /* And this is where we are coming from. */ + off -= (stub_entry->stub_offset + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + + size = 4; + if (stub_entry->stub_type == ppc_stub_long_branch_r2off) + { + bfd_vma r2off = get_r2off (info, stub_entry); + + if (r2off == 0) + { + htab->stub_error = TRUE; + return FALSE; + } + bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); + loc += 4; + size = 12; + if (PPC_HA (r2off) != 0) + { + size = 16; + bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); + loc += 4; + } + bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); + loc += 4; + off -= size - 4; + } + bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc); + + if (off + (1 << 25) >= (bfd_vma) (1 << 26)) + { + info->callbacks->einfo + (_("%P: long branch stub `%s' offset overflow\n"), + stub_entry->root.string); + htab->stub_error = TRUE; + return FALSE; + } + + if (info->emitrelocations) + { + r = get_relocs (stub_entry->stub_sec, 1); + if (r == NULL) + return FALSE; + r->r_offset = loc - stub_entry->stub_sec->contents; + r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); + r->r_addend = dest; + if (stub_entry->h != NULL) + { + struct elf_link_hash_entry **hashes; + unsigned long symndx; + struct ppc_link_hash_entry *h; + + hashes = elf_sym_hashes (htab->stub_bfd); + if (hashes == NULL) + { + bfd_size_type hsize; + + hsize = (htab->stub_globals + 1) * sizeof (*hashes); + hashes = bfd_zalloc (htab->stub_bfd, hsize); + if (hashes == NULL) + return FALSE; + elf_sym_hashes (htab->stub_bfd) = hashes; + htab->stub_globals = 1; + } + symndx = htab->stub_globals++; + h = stub_entry->h; + hashes[symndx] = &h->elf; + r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24); + if (h->oh != NULL && h->oh->is_func) + h = ppc_follow_link (h->oh); + if (h->elf.root.u.def.section != stub_entry->target_section) + /* H is an opd symbol. The addend must be zero. */ + r->r_addend = 0; + else + { + off = (h->elf.root.u.def.value + + h->elf.root.u.def.section->output_offset + + h->elf.root.u.def.section->output_section->vma); + r->r_addend -= off; + } + } + } + break; + + case ppc_stub_plt_branch: + case ppc_stub_plt_branch_r2off: + br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, + stub_entry->root.string + 9, + FALSE, FALSE); + if (br_entry == NULL) + { + info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"), + stub_entry->root.string); + htab->stub_error = TRUE; + return FALSE; + } + + dest = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + + bfd_put_64 (htab->brlt->owner, dest, + htab->brlt->contents + br_entry->offset); + + if (br_entry->iter == htab->stub_iteration) + { + br_entry->iter = 0; + + if (htab->relbrlt != NULL) + { + /* Create a reloc for the branch lookup table entry. */ + Elf_Internal_Rela rela; + bfd_byte *rl; + + rela.r_offset = (br_entry->offset + + htab->brlt->output_offset + + htab->brlt->output_section->vma); + rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + rela.r_addend = dest; + + rl = htab->relbrlt->contents; + rl += (htab->relbrlt->reloc_count++ + * sizeof (Elf64_External_Rela)); + bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); + } + else if (info->emitrelocations) + { + r = get_relocs (htab->brlt, 1); + if (r == NULL) + return FALSE; + /* brlt, being SEC_LINKER_CREATED does not go through the + normal reloc processing. Symbols and offsets are not + translated from input file to output file form, so + set up the offset per the output file. */ + r->r_offset = (br_entry->offset + + htab->brlt->output_offset + + htab->brlt->output_section->vma); + r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + r->r_addend = dest; + } + } + + dest = (br_entry->offset + + htab->brlt->output_offset + + htab->brlt->output_section->vma); + + off = (dest + - elf_gp (htab->brlt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) + { + info->callbacks->einfo + (_("%P: linkage table error against `%T'\n"), + stub_entry->root.string); + bfd_set_error (bfd_error_bad_value); + htab->stub_error = TRUE; + return FALSE; + } + + if (info->emitrelocations) + { + r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0)); + if (r == NULL) + return FALSE; + r[0].r_offset = loc - stub_entry->stub_sec->contents; + if (bfd_big_endian (info->output_bfd)) + r[0].r_offset += 2; + if (stub_entry->stub_type == ppc_stub_plt_branch_r2off) + r[0].r_offset += 4; + r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); + r[0].r_addend = dest; + if (PPC_HA (off) != 0) + { + r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); + r[1].r_offset = r[0].r_offset + 4; + r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); + r[1].r_addend = r[0].r_addend; + } + } + + if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) + { + if (PPC_HA (off) != 0) + { + size = 16; + bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc); + } + else + { + size = 12; + bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc); + } + } + else + { + bfd_vma r2off = get_r2off (info, stub_entry); + + if (r2off == 0) + { + htab->stub_error = TRUE; + return FALSE; + } + + bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); + loc += 4; + size = 20; + if (PPC_HA (off) != 0) + { + size += 4; + bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc); + loc += 4; + } + else + { + bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc); + loc += 4; + } + + if (PPC_HA (r2off) != 0) + { + size += 4; + bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); + loc += 4; + } + bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); + } + loc += 4; + bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, BCTR, loc); + break; + + case ppc_stub_plt_call: + case ppc_stub_plt_call_r2save: + if (stub_entry->h != NULL + && stub_entry->h->is_func_descriptor + && stub_entry->h->oh != NULL) + { + struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh); + + /* If the old-ABI "dot-symbol" is undefined make it weak so + we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. + FIXME: We used to define the symbol on one of the call + stubs instead, which is why we test symbol section id + against htab->top_id in various places. Likely all + these checks could now disappear. */ + if (fh->elf.root.type == bfd_link_hash_undefined) + fh->elf.root.type = bfd_link_hash_undefweak; + /* Stop undo_symbol_twiddle changing it back to undefined. */ + fh->was_undefined = 0; + } + + /* Now build the stub. */ + dest = stub_entry->plt_ent->plt.offset & ~1; + if (dest >= (bfd_vma) -2) + abort (); + + plt = htab->plt; + if (!htab->elf.dynamic_sections_created + || stub_entry->h == NULL + || stub_entry->h->elf.dynindx == -1) + plt = htab->iplt; + + dest += plt->output_offset + plt->output_section->vma; + + if (stub_entry->h == NULL + && (stub_entry->plt_ent->plt.offset & 1) == 0) + { + Elf_Internal_Rela rela; + bfd_byte *rl; + + rela.r_offset = dest; + rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); + rela.r_addend = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + + rl = (htab->reliplt->contents + + (htab->reliplt->reloc_count++ + * sizeof (Elf64_External_Rela))); + bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl); + stub_entry->plt_ent->plt.offset |= 1; + } + + off = (dest + - elf_gp (plt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) + { + info->callbacks->einfo + (_("%P: linkage table error against `%T'\n"), + stub_entry->h != NULL + ? stub_entry->h->elf.root.root.string + : "<local sym>"); + bfd_set_error (bfd_error_bad_value); + htab->stub_error = TRUE; + return FALSE; + } + + if (htab->plt_stub_align != 0) + { + unsigned pad = plt_stub_pad (htab, stub_entry, off); + + stub_entry->stub_sec->size += pad; + stub_entry->stub_offset = stub_entry->stub_sec->size; + loc += pad; + } + + r = NULL; + if (info->emitrelocations) + { + r = get_relocs (stub_entry->stub_sec, + (2 + + (PPC_HA (off) != 0) + + (htab->plt_static_chain + && PPC_HA (off + 16) == PPC_HA (off)))); + if (r == NULL) + return FALSE; + r[0].r_offset = loc - stub_entry->stub_sec->contents; + if (bfd_big_endian (info->output_bfd)) + r[0].r_offset += 2; + r[0].r_addend = dest; + } + if (stub_entry->h != NULL + && (stub_entry->h == htab->tls_get_addr_fd + || stub_entry->h == htab->tls_get_addr) + && !htab->no_tls_get_addr_opt) + p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r); + else + p = build_plt_stub (htab, stub_entry, loc, off, r); + size = p - loc; + break; + + default: + BFD_FAIL (); + return FALSE; + } + + stub_entry->stub_sec->size += size; + + if (htab->emit_stub_syms) + { + struct elf_link_hash_entry *h; + size_t len1, len2; + char *name; + const char *const stub_str[] = { "long_branch", + "long_branch_r2off", + "plt_branch", + "plt_branch_r2off", + "plt_call", + "plt_call" }; + + len1 = strlen (stub_str[stub_entry->stub_type - 1]); + len2 = strlen (stub_entry->root.string); + name = bfd_malloc (len1 + len2 + 2); + if (name == NULL) + return FALSE; + memcpy (name, stub_entry->root.string, 9); + memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1); + memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1); + h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); + if (h == NULL) + return FALSE; + if (h->root.type == bfd_link_hash_new) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = stub_entry->stub_sec; + h->root.u.def.value = stub_entry->stub_offset; + h->ref_regular = 1; + h->def_regular = 1; + h->ref_regular_nonweak = 1; + h->forced_local = 1; + h->non_elf = 0; + } + } + + return TRUE; +} + +/* As above, but don't actually build the stub. Just bump offset so + we know stub section sizes, and select plt_branch stubs where + long_branch stubs won't do. */ + +static bfd_boolean +ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) +{ + struct ppc_stub_hash_entry *stub_entry; + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + bfd_vma off; + int size; + + /* Massage our args to the form they really have. */ + stub_entry = (struct ppc_stub_hash_entry *) gen_entry; + info = in_arg; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + if (stub_entry->stub_type == ppc_stub_plt_call + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + { + asection *plt; + off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1; + if (off >= (bfd_vma) -2) + abort (); + plt = htab->plt; + if (!htab->elf.dynamic_sections_created + || stub_entry->h == NULL + || stub_entry->h->elf.dynindx == -1) + plt = htab->iplt; + off += (plt->output_offset + + plt->output_section->vma + - elf_gp (plt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + size = plt_stub_size (htab, stub_entry, off); + if (htab->plt_stub_align) + size += plt_stub_pad (htab, stub_entry, off); + if (info->emitrelocations) + { + stub_entry->stub_sec->reloc_count + += (2 + + (PPC_HA (off) != 0) + + (htab->plt_static_chain + && PPC_HA (off + 16) == PPC_HA (off))); + stub_entry->stub_sec->flags |= SEC_RELOC; + } + } + else + { + /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off + variants. */ + bfd_vma r2off = 0; + + off = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + off -= (stub_entry->stub_sec->size + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + + /* Reset the stub type from the plt variant in case we now + can reach with a shorter stub. */ + if (stub_entry->stub_type >= ppc_stub_plt_branch) + stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; + + size = 4; + if (stub_entry->stub_type == ppc_stub_long_branch_r2off) + { + r2off = get_r2off (info, stub_entry); + if (r2off == 0) + { + htab->stub_error = TRUE; + return FALSE; + } + size = 12; + if (PPC_HA (r2off) != 0) + size = 16; + off -= size - 4; + } + + /* If the branch offset if too big, use a ppc_stub_plt_branch. */ + if (off + (1 << 25) >= (bfd_vma) (1 << 26)) + { + struct ppc_branch_hash_entry *br_entry; + + br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, + stub_entry->root.string + 9, + TRUE, FALSE); + if (br_entry == NULL) + { + info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"), + stub_entry->root.string); + htab->stub_error = TRUE; + return FALSE; + } + + if (br_entry->iter != htab->stub_iteration) + { + br_entry->iter = htab->stub_iteration; + br_entry->offset = htab->brlt->size; + htab->brlt->size += 8; + + if (htab->relbrlt != NULL) + htab->relbrlt->size += sizeof (Elf64_External_Rela); + else if (info->emitrelocations) + { + htab->brlt->reloc_count += 1; + htab->brlt->flags |= SEC_RELOC; + } + } + + stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; + off = (br_entry->offset + + htab->brlt->output_offset + + htab->brlt->output_section->vma + - elf_gp (htab->brlt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + if (info->emitrelocations) + { + stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0); + stub_entry->stub_sec->flags |= SEC_RELOC; + } + + if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) + { + size = 12; + if (PPC_HA (off) != 0) + size = 16; + } + else + { + size = 20; + if (PPC_HA (off) != 0) + size += 4; + + if (PPC_HA (r2off) != 0) + size += 4; + } + } + else if (info->emitrelocations) + { + stub_entry->stub_sec->reloc_count += 1; + stub_entry->stub_sec->flags |= SEC_RELOC; + } + } + + stub_entry->stub_sec->size += size; + return TRUE; +} + +/* Set up various things so that we can make a list of input sections + for each output section included in the link. Returns -1 on error, + 0 when no stubs will be needed, and 1 on success. */ + +int +ppc64_elf_setup_section_lists + (struct bfd_link_info *info, + asection *(*add_stub_section) (const char *, asection *), + void (*layout_sections_again) (void)) +{ + bfd *input_bfd; + int top_id, top_index, id; + asection *section; + asection **input_list; + bfd_size_type amt; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab == NULL) + return -1; + /* Stash our params away. */ + htab->add_stub_section = add_stub_section; + htab->layout_sections_again = layout_sections_again; + + /* Find the top input section id. */ + for (input_bfd = info->input_bfds, top_id = 3; + input_bfd != NULL; + input_bfd = input_bfd->link_next) + { + for (section = input_bfd->sections; + section != NULL; + section = section->next) + { + if (top_id < section->id) + top_id = section->id; + } + } + + htab->top_id = top_id; + amt = sizeof (struct map_stub) * (top_id + 1); + htab->stub_group = bfd_zmalloc (amt); + if (htab->stub_group == NULL) + return -1; + + /* Set toc_off for com, und, abs and ind sections. */ + for (id = 0; id < 3; id++) + htab->stub_group[id].toc_off = TOC_BASE_OFF; + + /* We can't use output_bfd->section_count here to find the top output + section index as some sections may have been removed, and + strip_excluded_output_sections doesn't renumber the indices. */ + for (section = info->output_bfd->sections, top_index = 0; + section != NULL; + section = section->next) + { + if (top_index < section->index) + top_index = section->index; + } + + htab->top_index = top_index; + amt = sizeof (asection *) * (top_index + 1); + input_list = bfd_zmalloc (amt); + htab->input_list = input_list; + if (input_list == NULL) + return -1; + + return 1; +} + +/* Set up for first pass at multitoc partitioning. */ + +void +ppc64_elf_start_multitoc_partition (struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd); + htab->toc_bfd = NULL; + htab->toc_first_sec = NULL; +} + +/* The linker repeatedly calls this function for each TOC input section + and linker generated GOT section. Group input bfds such that the toc + within a group is less than 64k in size. */ + +bfd_boolean +ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + bfd_vma addr, off, limit; + + if (htab == NULL) + return FALSE; + + if (!htab->second_toc_pass) + { + /* Keep track of the first .toc or .got section for this input bfd. */ + bfd_boolean new_bfd = htab->toc_bfd != isec->owner; + + if (new_bfd) + { + htab->toc_bfd = isec->owner; + htab->toc_first_sec = isec; + } + + addr = isec->output_offset + isec->output_section->vma; + off = addr - htab->toc_curr; + limit = 0x80008000; + if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc) + limit = 0x10000; + if (off + isec->size > limit) + { + addr = (htab->toc_first_sec->output_offset + + htab->toc_first_sec->output_section->vma); + htab->toc_curr = addr; + } + + /* toc_curr is the base address of this toc group. Set elf_gp + for the input section to be the offset relative to the + output toc base plus 0x8000. Making the input elf_gp an + offset allows us to move the toc as a whole without + recalculating input elf_gp. */ + off = htab->toc_curr - elf_gp (isec->output_section->owner); + off += TOC_BASE_OFF; + + /* Die if someone uses a linker script that doesn't keep input + file .toc and .got together. */ + if (new_bfd + && elf_gp (isec->owner) != 0 + && elf_gp (isec->owner) != off) + return FALSE; + + elf_gp (isec->owner) = off; + return TRUE; + } + + /* During the second pass toc_first_sec points to the start of + a toc group, and toc_curr is used to track the old elf_gp. + We use toc_bfd to ensure we only look at each bfd once. */ + if (htab->toc_bfd == isec->owner) + return TRUE; + htab->toc_bfd = isec->owner; + + if (htab->toc_first_sec == NULL + || htab->toc_curr != elf_gp (isec->owner)) + { + htab->toc_curr = elf_gp (isec->owner); + htab->toc_first_sec = isec; + } + addr = (htab->toc_first_sec->output_offset + + htab->toc_first_sec->output_section->vma); + off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF; + elf_gp (isec->owner) = off; + + return TRUE; +} + +/* Called via elf_link_hash_traverse to merge GOT entries for global + symbol H. */ + +static bfd_boolean +merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) +{ + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + merge_got_entries (&h->got.glist); + + return TRUE; +} + +/* Called via elf_link_hash_traverse to allocate GOT entries for global + symbol H. */ + +static bfd_boolean +reallocate_got (struct elf_link_hash_entry *h, void *inf) +{ + struct got_entry *gent; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + for (gent = h->got.glist; gent != NULL; gent = gent->next) + if (!gent->is_indirect) + allocate_got (h, (struct bfd_link_info *) inf, gent); + return TRUE; +} + +/* Called on the first multitoc pass after the last call to + ppc64_elf_next_toc_section. This function removes duplicate GOT + entries. */ + +bfd_boolean +ppc64_elf_layout_multitoc (struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + struct bfd *ibfd, *ibfd2; + bfd_boolean done_something; + + htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd); + + if (!htab->do_multi_toc) + return FALSE; + + /* Merge global sym got entries within a toc group. */ + elf_link_hash_traverse (&htab->elf, merge_global_got, info); + + /* And tlsld_got. */ + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + struct got_entry *ent, *ent2; + + if (!is_ppc64_elf (ibfd)) + continue; + + ent = ppc64_tlsld_got (ibfd); + if (!ent->is_indirect + && ent->got.offset != (bfd_vma) -1) + { + for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next) + { + if (!is_ppc64_elf (ibfd2)) + continue; + + ent2 = ppc64_tlsld_got (ibfd2); + if (!ent2->is_indirect + && ent2->got.offset != (bfd_vma) -1 + && elf_gp (ibfd2) == elf_gp (ibfd)) + { + ent2->is_indirect = TRUE; + ent2->got.ent = ent; + } + } + } + } + + /* Zap sizes of got sections. */ + htab->reliplt->rawsize = htab->reliplt->size; + htab->reliplt->size -= htab->got_reli_size; + htab->got_reli_size = 0; + + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + asection *got, *relgot; + + if (!is_ppc64_elf (ibfd)) + continue; + + got = ppc64_elf_tdata (ibfd)->got; + if (got != NULL) + { + got->rawsize = got->size; + got->size = 0; + relgot = ppc64_elf_tdata (ibfd)->relgot; + relgot->rawsize = relgot->size; + relgot->size = 0; + } + } + + /* Now reallocate the got, local syms first. We don't need to + allocate section contents again since we never increase size. */ + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + struct got_entry **lgot_ents; + struct got_entry **end_lgot_ents; + struct plt_entry **local_plt; + struct plt_entry **end_local_plt; + unsigned char *lgot_masks; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + asection *s; + + if (!is_ppc64_elf (ibfd)) + continue; + + lgot_ents = elf_local_got_ents (ibfd); + if (!lgot_ents) + continue; + + symtab_hdr = &elf_symtab_hdr (ibfd); + locsymcount = symtab_hdr->sh_info; + end_lgot_ents = lgot_ents + locsymcount; + local_plt = (struct plt_entry **) end_lgot_ents; + end_local_plt = local_plt + locsymcount; + lgot_masks = (unsigned char *) end_local_plt; + s = ppc64_elf_tdata (ibfd)->got; + for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) + { + struct got_entry *ent; + + for (ent = *lgot_ents; ent != NULL; ent = ent->next) + { + unsigned int ent_size = 8; + unsigned int rel_size = sizeof (Elf64_External_Rela); + + ent->got.offset = s->size; + if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) + { + ent_size *= 2; + rel_size *= 2; + } + s->size += ent_size; + if ((*lgot_masks & PLT_IFUNC) != 0) + { + htab->reliplt->size += rel_size; + htab->got_reli_size += rel_size; + } + else if (info->shared) + { + asection *srel = ppc64_elf_tdata (ibfd)->relgot; + srel->size += rel_size; + } + } + } + } + + elf_link_hash_traverse (&htab->elf, reallocate_got, info); + + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + struct got_entry *ent; + + if (!is_ppc64_elf (ibfd)) + continue; + + ent = ppc64_tlsld_got (ibfd); + if (!ent->is_indirect + && ent->got.offset != (bfd_vma) -1) + { + asection *s = ppc64_elf_tdata (ibfd)->got; + ent->got.offset = s->size; + s->size += 16; + if (info->shared) + { + asection *srel = ppc64_elf_tdata (ibfd)->relgot; + srel->size += sizeof (Elf64_External_Rela); + } + } + } + + done_something = htab->reliplt->rawsize != htab->reliplt->size; + if (!done_something) + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + asection *got; + + if (!is_ppc64_elf (ibfd)) + continue; + + got = ppc64_elf_tdata (ibfd)->got; + if (got != NULL) + { + done_something = got->rawsize != got->size; + if (done_something) + break; + } + } + + if (done_something) + (*htab->layout_sections_again) (); + + /* Set up for second pass over toc sections to recalculate elf_gp + on input sections. */ + htab->toc_bfd = NULL; + htab->toc_first_sec = NULL; + htab->second_toc_pass = TRUE; + return done_something; +} + +/* Called after second pass of multitoc partitioning. */ + +void +ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + /* After the second pass, toc_curr tracks the TOC offset used + for code sections below in ppc64_elf_next_input_section. */ + htab->toc_curr = TOC_BASE_OFF; +} + +/* No toc references were found in ISEC. If the code in ISEC makes no + calls, then there's no need to use toc adjusting stubs when branching + into ISEC. Actually, indirect calls from ISEC are OK as they will + load r2. Returns -1 on error, 0 for no stub needed, 1 for stub + needed, and 2 if a cyclical call-graph was found but no other reason + for a stub was detected. If called from the top level, a return of + 2 means the same as a return of 0. */ + +static int +toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) +{ + int ret; + + /* Mark this section as checked. */ + isec->call_check_done = 1; + + /* We know none of our code bearing sections will need toc stubs. */ + if ((isec->flags & SEC_LINKER_CREATED) != 0) + return 0; + + if (isec->size == 0) + return 0; + + if (isec->output_section == NULL) + return 0; + + ret = 0; + if (isec->reloc_count != 0) + { + Elf_Internal_Rela *relstart, *rel; + Elf_Internal_Sym *local_syms; + struct ppc_link_hash_table *htab; + + relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return -1; + + /* Look for branches to outside of this section. */ + local_syms = NULL; + htab = ppc_hash_table (info); + if (htab == NULL) + return -1; + + for (rel = relstart; rel < relstart + isec->reloc_count; ++rel) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + struct ppc_link_hash_entry *eh; + Elf_Internal_Sym *sym; + asection *sym_sec; + struct _opd_sec_data *opd; + bfd_vma sym_value; + bfd_vma dest; + + r_type = ELF64_R_TYPE (rel->r_info); + if (r_type != R_PPC64_REL24 + && r_type != R_PPC64_REL14 + && r_type != R_PPC64_REL14_BRTAKEN + && r_type != R_PPC64_REL14_BRNTAKEN) + continue; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx, + isec->owner)) + { + ret = -1; + break; + } + + /* Calls to dynamic lib functions go through a plt call stub + that uses r2. */ + eh = (struct ppc_link_hash_entry *) h; + if (eh != NULL + && (eh->elf.plt.plist != NULL + || (eh->oh != NULL + && ppc_follow_link (eh->oh)->elf.plt.plist != NULL))) + { + ret = 1; + break; + } + + if (sym_sec == NULL) + /* Ignore other undefined symbols. */ + continue; + + /* Assume branches to other sections not included in the + link need stubs too, to cover -R and absolute syms. */ + if (sym_sec->output_section == NULL) + { + ret = 1; + break; + } + + if (h == NULL) + sym_value = sym->st_value; + else + { + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + abort (); + sym_value = h->root.u.def.value; + } + sym_value += rel->r_addend; + + /* If this branch reloc uses an opd sym, find the code section. */ + opd = get_opd_info (sym_sec); + if (opd != NULL) + { + if (h == NULL && opd->adjust != NULL) + { + long adjust; + + adjust = opd->adjust[sym->st_value / 8]; + if (adjust == -1) + /* Assume deleted functions won't ever be called. */ + continue; + sym_value += adjust; + } + + dest = opd_entry_value (sym_sec, sym_value, + &sym_sec, NULL, FALSE); + if (dest == (bfd_vma) -1) + continue; + } + else + dest = (sym_value + + sym_sec->output_offset + + sym_sec->output_section->vma); + + /* Ignore branch to self. */ + if (sym_sec == isec) + continue; + + /* If the called function uses the toc, we need a stub. */ + if (sym_sec->has_toc_reloc + || sym_sec->makes_toc_func_call) + { + ret = 1; + break; + } + + /* Assume any branch that needs a long branch stub might in fact + need a plt_branch stub. A plt_branch stub uses r2. */ + else if (dest - (isec->output_offset + + isec->output_section->vma + + rel->r_offset) + (1 << 25) >= (2 << 25)) + { + ret = 1; + break; + } + + /* If calling back to a section in the process of being + tested, we can't say for sure that no toc adjusting stubs + are needed, so don't return zero. */ + else if (sym_sec->call_check_in_progress) + ret = 2; + + /* Branches to another section that itself doesn't have any TOC + references are OK. Recursively call ourselves to check. */ + else if (!sym_sec->call_check_done) + { + int recur; + + /* Mark current section as indeterminate, so that other + sections that call back to current won't be marked as + known. */ + isec->call_check_in_progress = 1; + recur = toc_adjusting_stub_needed (info, sym_sec); + isec->call_check_in_progress = 0; + + if (recur != 0) + { + ret = recur; + if (recur != 2) + break; + } + } + } + + if (local_syms != NULL + && (elf_symtab_hdr (isec->owner).contents + != (unsigned char *) local_syms)) + free (local_syms); + if (elf_section_data (isec)->relocs != relstart) + free (relstart); + } + + if ((ret & 1) == 0 + && isec->map_head.s != NULL + && (strcmp (isec->output_section->name, ".init") == 0 + || strcmp (isec->output_section->name, ".fini") == 0)) + { + if (isec->map_head.s->has_toc_reloc + || isec->map_head.s->makes_toc_func_call) + ret = 1; + else if (!isec->map_head.s->call_check_done) + { + int recur; + isec->call_check_in_progress = 1; + recur = toc_adjusting_stub_needed (info, isec->map_head.s); + isec->call_check_in_progress = 0; + if (recur != 0) + ret = recur; + } + } + + if (ret == 1) + isec->makes_toc_func_call = 1; + + return ret; +} + +/* The linker repeatedly calls this function for each input section, + in the order that input sections are linked into output sections. + Build lists of input sections to determine groupings between which + we may insert linker stubs. */ + +bfd_boolean +ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab == NULL) + return FALSE; + + if ((isec->output_section->flags & SEC_CODE) != 0 + && isec->output_section->index <= htab->top_index) + { + asection **list = htab->input_list + isec->output_section->index; + /* Steal the link_sec pointer for our list. */ +#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) + /* This happens to make the list in reverse order, + which is what we want. */ + PREV_SEC (isec) = *list; + *list = isec; + } + + if (htab->multi_toc_needed) + { + /* If a code section has a function that uses the TOC then we need + to use the right TOC (obviously). Also, make sure that .opd gets + the correct TOC value for R_PPC64_TOC relocs that don't have or + can't find their function symbol (shouldn't ever happen now). + Also specially treat .fixup for the linux kernel. .fixup + contains branches, but only back to the function that hit an + exception. */ + if (isec->has_toc_reloc + || (isec->flags & SEC_CODE) == 0 + || strcmp (isec->name, ".fixup") == 0) + { + if (elf_gp (isec->owner) != 0) + htab->toc_curr = elf_gp (isec->owner); + } + else + { + if (!isec->call_check_done + && toc_adjusting_stub_needed (info, isec) < 0) + return FALSE; + /* If we make a local call from this section, ie. a branch + without a following nop, then we have no place to put a + toc restoring insn. We must use the same toc group as + the callee. + Testing makes_toc_func_call actually tests for *any* + calls to functions that need a good toc pointer. A more + precise test would be better, as this one will set + incorrect values for pasted .init/.fini fragments. + (Fixed later in check_pasted_section.) */ + if (isec->makes_toc_func_call + && elf_gp (isec->owner) != 0) + htab->toc_curr = elf_gp (isec->owner); + } + } + + /* Functions that don't use the TOC can belong in any TOC group. + Use the last TOC base. */ + htab->stub_group[isec->id].toc_off = htab->toc_curr; + return TRUE; +} + +/* Check that all .init and .fini sections use the same toc, if they + have toc relocs. */ + +static bfd_boolean +check_pasted_section (struct bfd_link_info *info, const char *name) +{ + asection *o = bfd_get_section_by_name (info->output_bfd, name); + + if (o != NULL) + { + struct ppc_link_hash_table *htab = ppc_hash_table (info); + bfd_vma toc_off = 0; + asection *i; + + for (i = o->map_head.s; i != NULL; i = i->map_head.s) + if (i->has_toc_reloc) + { + if (toc_off == 0) + toc_off = htab->stub_group[i->id].toc_off; + else if (toc_off != htab->stub_group[i->id].toc_off) + return FALSE; + } + + if (toc_off == 0) + for (i = o->map_head.s; i != NULL; i = i->map_head.s) + if (i->makes_toc_func_call) + { + toc_off = htab->stub_group[i->id].toc_off; + break; + } + + /* Make sure the whole pasted function uses the same toc offset. */ + if (toc_off != 0) + for (i = o->map_head.s; i != NULL; i = i->map_head.s) + htab->stub_group[i->id].toc_off = toc_off; + } + return TRUE; +} + +bfd_boolean +ppc64_elf_check_init_fini (struct bfd_link_info *info) +{ + return (check_pasted_section (info, ".init") + & check_pasted_section (info, ".fini")); +} + +/* See whether we can group stub sections together. Grouping stub + sections may result in fewer stubs. More importantly, we need to + put all .init* and .fini* stubs at the beginning of the .init or + .fini output sections respectively, because glibc splits the + _init and _fini functions into multiple parts. Putting a stub in + the middle of a function is not a good idea. */ + +static void +group_sections (struct ppc_link_hash_table *htab, + bfd_size_type stub_group_size, + bfd_boolean stubs_always_before_branch) +{ + asection **list; + bfd_size_type stub14_group_size; + bfd_boolean suppress_size_errors; + + suppress_size_errors = FALSE; + stub14_group_size = stub_group_size; + if (stub_group_size == 1) + { + /* Default values. */ + if (stubs_always_before_branch) + { + stub_group_size = 0x1e00000; + stub14_group_size = 0x7800; + } + else + { + stub_group_size = 0x1c00000; + stub14_group_size = 0x7000; + } + suppress_size_errors = TRUE; + } + + list = htab->input_list + htab->top_index; + do + { + asection *tail = *list; + while (tail != NULL) + { + asection *curr; + asection *prev; + bfd_size_type total; + bfd_boolean big_sec; + bfd_vma curr_toc; + + curr = tail; + total = tail->size; + big_sec = total > (ppc64_elf_section_data (tail) != NULL + && ppc64_elf_section_data (tail)->has_14bit_branch + ? stub14_group_size : stub_group_size); + if (big_sec && !suppress_size_errors) + (*_bfd_error_handler) (_("%B section %A exceeds stub group size"), + tail->owner, tail); + curr_toc = htab->stub_group[tail->id].toc_off; + + while ((prev = PREV_SEC (curr)) != NULL + && ((total += curr->output_offset - prev->output_offset) + < (ppc64_elf_section_data (prev) != NULL + && ppc64_elf_section_data (prev)->has_14bit_branch + ? stub14_group_size : stub_group_size)) + && htab->stub_group[prev->id].toc_off == curr_toc) + curr = prev; + + /* OK, the size from the start of CURR to the end is less + than stub_group_size and thus can be handled by one stub + section. (or the tail section is itself larger than + stub_group_size, in which case we may be toast.) We + should really be keeping track of the total size of stubs + added here, as stubs contribute to the final output + section size. That's a little tricky, and this way will + only break if stubs added make the total size more than + 2^25, ie. for the default stub_group_size, if stubs total + more than 2097152 bytes, or nearly 75000 plt call stubs. */ + do + { + prev = PREV_SEC (tail); + /* Set up this stub group. */ + htab->stub_group[tail->id].link_sec = curr; + } + while (tail != curr && (tail = prev) != NULL); + + /* But wait, there's more! Input sections up to stub_group_size + bytes before the stub section can be handled by it too. + Don't do this if we have a really large section after the + stubs, as adding more stubs increases the chance that + branches may not reach into the stub section. */ + if (!stubs_always_before_branch && !big_sec) + { + total = 0; + while (prev != NULL + && ((total += tail->output_offset - prev->output_offset) + < (ppc64_elf_section_data (prev) != NULL + && ppc64_elf_section_data (prev)->has_14bit_branch + ? stub14_group_size : stub_group_size)) + && htab->stub_group[prev->id].toc_off == curr_toc) + { + tail = prev; + prev = PREV_SEC (tail); + htab->stub_group[tail->id].link_sec = curr; + } + } + tail = prev; + } + } + while (list-- != htab->input_list); + free (htab->input_list); +#undef PREV_SEC +} + +static const unsigned char glink_eh_frame_cie[] = +{ + 0, 0, 0, 16, /* length. */ + 0, 0, 0, 0, /* id. */ + 1, /* CIE version. */ + 'z', 'R', 0, /* Augmentation string. */ + 4, /* Code alignment. */ + 0x78, /* Data alignment. */ + 65, /* RA reg. */ + 1, /* Augmentation size. */ + DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ + DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ +}; + +/* Stripping output sections is normally done before dynamic section + symbols have been allocated. This function is called later, and + handles cases like htab->brlt which is mapped to its own output + section. */ + +static void +maybe_strip_output (struct bfd_link_info *info, asection *isec) +{ + if (isec->size == 0 + && isec->output_section->size == 0 + && !(isec->output_section->flags & SEC_KEEP) + && !bfd_section_removed_from_list (info->output_bfd, + isec->output_section) + && elf_section_data (isec->output_section)->dynindx == 0) + { + isec->output_section->flags |= SEC_EXCLUDE; + bfd_section_list_remove (info->output_bfd, isec->output_section); + info->output_bfd->section_count--; + } +} + +/* Determine and set the size of the stub section for a final link. + + The basic idea here is to examine all the relocations looking for + PC-relative calls to a target that is unreachable with a "bl" + instruction. */ + +bfd_boolean +ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size, + bfd_boolean plt_static_chain, int plt_thread_safe, + int plt_stub_align) +{ + bfd_size_type stub_group_size; + bfd_boolean stubs_always_before_branch; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab == NULL) + return FALSE; + + htab->plt_static_chain = plt_static_chain; + htab->plt_stub_align = plt_stub_align; + if (plt_thread_safe == -1 && !info->executable) + plt_thread_safe = 1; + if (plt_thread_safe == -1) + { + static const char *const thread_starter[] = + { + "pthread_create", + /* libstdc++ */ + "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", + /* librt */ + "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", + "mq_notify", "create_timer", + /* libanl */ + "getaddrinfo_a", + /* libgomp */ + "GOMP_parallel_start", + "GOMP_parallel_loop_static_start", + "GOMP_parallel_loop_dynamic_start", + "GOMP_parallel_loop_guided_start", + "GOMP_parallel_loop_runtime_start", + "GOMP_parallel_sections_start", + }; + unsigned i; + + for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++) + { + struct elf_link_hash_entry *h; + h = elf_link_hash_lookup (&htab->elf, thread_starter[i], + FALSE, FALSE, TRUE); + plt_thread_safe = h != NULL && h->ref_regular; + if (plt_thread_safe) + break; + } + } + htab->plt_thread_safe = plt_thread_safe; + stubs_always_before_branch = group_size < 0; + if (group_size < 0) + stub_group_size = -group_size; + else + stub_group_size = group_size; + + group_sections (htab, stub_group_size, stubs_always_before_branch); + + while (1) + { + bfd *input_bfd; + unsigned int bfd_indx; + asection *stub_sec; + + htab->stub_iteration += 1; + + for (input_bfd = info->input_bfds, bfd_indx = 0; + input_bfd != NULL; + input_bfd = input_bfd->link_next, bfd_indx++) + { + Elf_Internal_Shdr *symtab_hdr; + asection *section; + Elf_Internal_Sym *local_syms = NULL; + + if (!is_ppc64_elf (input_bfd)) + continue; + + /* We'll need the symbol table in a second. */ + symtab_hdr = &elf_symtab_hdr (input_bfd); + if (symtab_hdr->sh_info == 0) + continue; + + /* Walk over each section attached to the input bfd. */ + for (section = input_bfd->sections; + section != NULL; + section = section->next) + { + Elf_Internal_Rela *internal_relocs, *irelaend, *irela; + + /* If there aren't any relocs, then there's nothing more + to do. */ + if ((section->flags & SEC_RELOC) == 0 + || (section->flags & SEC_ALLOC) == 0 + || (section->flags & SEC_LOAD) == 0 + || (section->flags & SEC_CODE) == 0 + || section->reloc_count == 0) + continue; + + /* If this section is a link-once section that will be + discarded, then don't create any stubs. */ + if (section->output_section == NULL + || section->output_section->owner != info->output_bfd) + continue; + + /* Get the relocs. */ + internal_relocs + = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, + info->keep_memory); + if (internal_relocs == NULL) + goto error_ret_free_local; + + /* Now examine each relocation. */ + irela = internal_relocs; + irelaend = irela + section->reloc_count; + for (; irela < irelaend; irela++) + { + enum elf_ppc64_reloc_type r_type; + unsigned int r_indx; + enum ppc_stub_type stub_type; + struct ppc_stub_hash_entry *stub_entry; + asection *sym_sec, *code_sec; + bfd_vma sym_value, code_value; + bfd_vma destination; + bfd_boolean ok_dest; + struct ppc_link_hash_entry *hash; + struct ppc_link_hash_entry *fdh; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + char *stub_name; + const asection *id_sec; + struct _opd_sec_data *opd; + struct plt_entry *plt_ent; + + r_type = ELF64_R_TYPE (irela->r_info); + r_indx = ELF64_R_SYM (irela->r_info); + + if (r_type >= R_PPC64_max) + { + bfd_set_error (bfd_error_bad_value); + goto error_ret_free_internal; + } + + /* Only look for stubs on branch instructions. */ + if (r_type != R_PPC64_REL24 + && r_type != R_PPC64_REL14 + && r_type != R_PPC64_REL14_BRTAKEN + && r_type != R_PPC64_REL14_BRNTAKEN) + continue; + + /* Now determine the call target, its name, value, + section. */ + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_indx, input_bfd)) + goto error_ret_free_internal; + hash = (struct ppc_link_hash_entry *) h; + + ok_dest = FALSE; + fdh = NULL; + sym_value = 0; + if (hash == NULL) + { + sym_value = sym->st_value; + ok_dest = TRUE; + } + else if (hash->elf.root.type == bfd_link_hash_defined + || hash->elf.root.type == bfd_link_hash_defweak) + { + sym_value = hash->elf.root.u.def.value; + if (sym_sec->output_section != NULL) + ok_dest = TRUE; + } + else if (hash->elf.root.type == bfd_link_hash_undefweak + || hash->elf.root.type == bfd_link_hash_undefined) + { + /* Recognise an old ABI func code entry sym, and + use the func descriptor sym instead if it is + defined. */ + if (hash->elf.root.root.string[0] == '.' + && (fdh = lookup_fdh (hash, htab)) != NULL) + { + if (fdh->elf.root.type == bfd_link_hash_defined + || fdh->elf.root.type == bfd_link_hash_defweak) + { + sym_sec = fdh->elf.root.u.def.section; + sym_value = fdh->elf.root.u.def.value; + if (sym_sec->output_section != NULL) + ok_dest = TRUE; + } + else + fdh = NULL; + } + } + else + { + bfd_set_error (bfd_error_bad_value); + goto error_ret_free_internal; + } + + destination = 0; + if (ok_dest) + { + sym_value += irela->r_addend; + destination = (sym_value + + sym_sec->output_offset + + sym_sec->output_section->vma); + } + + code_sec = sym_sec; + code_value = sym_value; + opd = get_opd_info (sym_sec); + if (opd != NULL) + { + bfd_vma dest; + + if (hash == NULL && opd->adjust != NULL) + { + long adjust = opd->adjust[sym_value / 8]; + if (adjust == -1) + continue; + code_value += adjust; + sym_value += adjust; + } + dest = opd_entry_value (sym_sec, sym_value, + &code_sec, &code_value, FALSE); + if (dest != (bfd_vma) -1) + { + destination = dest; + if (fdh != NULL) + { + /* Fixup old ABI sym to point at code + entry. */ + hash->elf.root.type = bfd_link_hash_defweak; + hash->elf.root.u.def.section = code_sec; + hash->elf.root.u.def.value = code_value; + } + } + } + + /* Determine what (if any) linker stub is needed. */ + plt_ent = NULL; + stub_type = ppc_type_of_stub (section, irela, &hash, + &plt_ent, destination); + + if (stub_type != ppc_stub_plt_call) + { + /* Check whether we need a TOC adjusting stub. + Since the linker pastes together pieces from + different object files when creating the + _init and _fini functions, it may be that a + call to what looks like a local sym is in + fact a call needing a TOC adjustment. */ + if (code_sec != NULL + && code_sec->output_section != NULL + && (htab->stub_group[code_sec->id].toc_off + != htab->stub_group[section->id].toc_off) + && (code_sec->has_toc_reloc + || code_sec->makes_toc_func_call)) + stub_type = ppc_stub_long_branch_r2off; + } + + if (stub_type == ppc_stub_none) + continue; + + /* __tls_get_addr calls might be eliminated. */ + if (stub_type != ppc_stub_plt_call + && hash != NULL + && (hash == htab->tls_get_addr + || hash == htab->tls_get_addr_fd) + && section->has_tls_reloc + && irela != internal_relocs) + { + /* Get tls info. */ + unsigned char *tls_mask; + + if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms, + irela - 1, input_bfd)) + goto error_ret_free_internal; + if (*tls_mask != 0) + continue; + } + + if (stub_type == ppc_stub_plt_call + && irela + 1 < irelaend + && irela[1].r_offset == irela->r_offset + 4 + && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE) + { + if (!tocsave_find (htab, INSERT, + &local_syms, irela + 1, input_bfd)) + goto error_ret_free_internal; + } + else if (stub_type == ppc_stub_plt_call) + stub_type = ppc_stub_plt_call_r2save; + + /* Support for grouping stub sections. */ + id_sec = htab->stub_group[section->id].link_sec; + + /* Get the name of this stub. */ + stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); + if (!stub_name) + goto error_ret_free_internal; + + stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, + stub_name, FALSE, FALSE); + if (stub_entry != NULL) + { + /* The proper stub has already been created. */ + free (stub_name); + if (stub_type == ppc_stub_plt_call_r2save) + stub_entry->stub_type = stub_type; + continue; + } + + stub_entry = ppc_add_stub (stub_name, section, info); + if (stub_entry == NULL) + { + free (stub_name); + error_ret_free_internal: + if (elf_section_data (section)->relocs == NULL) + free (internal_relocs); + error_ret_free_local: + if (local_syms != NULL + && (symtab_hdr->contents + != (unsigned char *) local_syms)) + free (local_syms); + return FALSE; + } + + stub_entry->stub_type = stub_type; + if (stub_type != ppc_stub_plt_call + && stub_type != ppc_stub_plt_call_r2save) + { + stub_entry->target_value = code_value; + stub_entry->target_section = code_sec; + } + else + { + stub_entry->target_value = sym_value; + stub_entry->target_section = sym_sec; + } + stub_entry->h = hash; + stub_entry->plt_ent = plt_ent; + + if (stub_entry->h != NULL) + htab->stub_globals += 1; + } + + /* We're done with the internal relocs, free them. */ + if (elf_section_data (section)->relocs != internal_relocs) + free (internal_relocs); + } + + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + { + if (!info->keep_memory) + free (local_syms); + else + symtab_hdr->contents = (unsigned char *) local_syms; + } + } + + /* We may have added some stubs. Find out the new size of the + stub sections. */ + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + { + stub_sec->rawsize = stub_sec->size; + stub_sec->size = 0; + stub_sec->reloc_count = 0; + stub_sec->flags &= ~SEC_RELOC; + } + + htab->brlt->size = 0; + htab->brlt->reloc_count = 0; + htab->brlt->flags &= ~SEC_RELOC; + if (htab->relbrlt != NULL) + htab->relbrlt->size = 0; + + bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); + + if (info->emitrelocations + && htab->glink != NULL && htab->glink->size != 0) + { + htab->glink->reloc_count = 1; + htab->glink->flags |= SEC_RELOC; + } + + if (htab->glink_eh_frame != NULL + && !bfd_is_abs_section (htab->glink_eh_frame->output_section) + && htab->glink_eh_frame->output_section->size != 0) + { + size_t size = 0, align; + + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + size += 20; + if (htab->glink != NULL && htab->glink->size != 0) + size += 24; + if (size != 0) + size += sizeof (glink_eh_frame_cie); + align = 1; + align <<= htab->glink_eh_frame->output_section->alignment_power; + align -= 1; + size = (size + align) & ~align; + htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size; + htab->glink_eh_frame->size = size; + } + + if (htab->plt_stub_align != 0) + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1) + & (-1 << htab->plt_stub_align)); + + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 + && stub_sec->rawsize != stub_sec->size) + break; + + /* Exit from this loop when no stubs have been added, and no stubs + have changed size. */ + if (stub_sec == NULL + && (htab->glink_eh_frame == NULL + || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size)) + break; + + /* Ask the linker to do its stuff. */ + (*htab->layout_sections_again) (); + } + + maybe_strip_output (info, htab->brlt); + if (htab->glink_eh_frame != NULL) + maybe_strip_output (info, htab->glink_eh_frame); + + return TRUE; +} + +/* Called after we have determined section placement. If sections + move, we'll be called again. Provide a value for TOCstart. */ + +bfd_vma +ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd) +{ + asection *s; + bfd_vma TOCstart; + + /* The TOC consists of sections .got, .toc, .tocbss, .plt in that + order. The TOC starts where the first of these sections starts. */ + s = bfd_get_section_by_name (obfd, ".got"); + if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) + s = bfd_get_section_by_name (obfd, ".toc"); + if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) + s = bfd_get_section_by_name (obfd, ".tocbss"); + if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) + s = bfd_get_section_by_name (obfd, ".plt"); + if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) + { + /* This may happen for + o references to TOC base (SYM@toc / TOC[tc0]) without a + .toc directive + o bad linker script + o --gc-sections and empty TOC sections + + FIXME: Warn user? */ + + /* Look for a likely section. We probably won't even be + using TOCstart. */ + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY + | SEC_EXCLUDE)) + == (SEC_ALLOC | SEC_SMALL_DATA)) + break; + if (s == NULL) + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE)) + == (SEC_ALLOC | SEC_SMALL_DATA)) + break; + if (s == NULL) + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE)) + == SEC_ALLOC) + break; + if (s == NULL) + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC) + break; + } + + TOCstart = 0; + if (s != NULL) + TOCstart = s->output_section->vma + s->output_offset; + + _bfd_set_gp_value (obfd, TOCstart); + + if (info != NULL && s != NULL && is_ppc64_elf (obfd)) + { + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab != NULL + && htab->elf.hgot != NULL) + { + htab->elf.hgot->type = STT_OBJECT; + htab->elf.hgot->root.type = bfd_link_hash_defined; + htab->elf.hgot->root.u.def.value = TOC_BASE_OFF; + htab->elf.hgot->root.u.def.section = s; + } + } + return TOCstart; +} + +/* Build all the stubs associated with the current output file. + The stubs are kept in a hash table attached to the main linker + hash table. This function is called via gldelf64ppc_finish. */ + +bfd_boolean +ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, + struct bfd_link_info *info, + char **stats) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + asection *stub_sec; + bfd_byte *p; + int stub_sec_count = 0; + + if (htab == NULL) + return FALSE; + + htab->emit_stub_syms = emit_stub_syms; + + /* Allocate memory to hold the linker stubs. */ + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 + && stub_sec->size != 0) + { + stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size); + if (stub_sec->contents == NULL) + return FALSE; + /* We want to check that built size is the same as calculated + size. rawsize is a convenient location to use. */ + stub_sec->rawsize = stub_sec->size; + stub_sec->size = 0; + } + + if (htab->glink != NULL && htab->glink->size != 0) + { + unsigned int indx; + bfd_vma plt0; + + /* Build the .glink plt call stub. */ + if (htab->emit_stub_syms) + { + struct elf_link_hash_entry *h; + h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", + TRUE, FALSE, FALSE); + if (h == NULL) + return FALSE; + if (h->root.type == bfd_link_hash_new) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = htab->glink; + h->root.u.def.value = 8; + h->ref_regular = 1; + h->def_regular = 1; + h->ref_regular_nonweak = 1; + h->forced_local = 1; + h->non_elf = 0; + } + } + plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16; + if (info->emitrelocations) + { + Elf_Internal_Rela *r = get_relocs (htab->glink, 1); + if (r == NULL) + return FALSE; + r->r_offset = (htab->glink->output_offset + + htab->glink->output_section->vma); + r->r_info = ELF64_R_INFO (0, R_PPC64_REL64); + r->r_addend = plt0; + } + p = htab->glink->contents; + plt0 -= htab->glink->output_section->vma + htab->glink->output_offset; + bfd_put_64 (htab->glink->owner, plt0, p); + p += 8; + bfd_put_32 (htab->glink->owner, MFLR_R12, p); + p += 4; + bfd_put_32 (htab->glink->owner, BCL_20_31, p); + p += 4; + bfd_put_32 (htab->glink->owner, MFLR_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, MTLR_R12, p); + p += 4; + bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R11_0R12, p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p); + p += 4; + bfd_put_32 (htab->glink->owner, MTCTR_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p); + p += 4; + bfd_put_32 (htab->glink->owner, BCTR, p); + p += 4; + while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE) + { + bfd_put_32 (htab->glink->owner, NOP, p); + p += 4; + } + + /* Build the .glink lazy link call stubs. */ + indx = 0; + while (p < htab->glink->contents + htab->glink->size) + { + if (indx < 0x8000) + { + bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); + p += 4; + } + else + { + bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); + p += 4; + bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); + p += 4; + } + bfd_put_32 (htab->glink->owner, + B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); + indx++; + p += 4; + } + htab->glink->rawsize = p - htab->glink->contents; + } + + if (htab->brlt->size != 0) + { + htab->brlt->contents = bfd_zalloc (htab->brlt->owner, + htab->brlt->size); + if (htab->brlt->contents == NULL) + return FALSE; + } + if (htab->relbrlt != NULL && htab->relbrlt->size != 0) + { + htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, + htab->relbrlt->size); + if (htab->relbrlt->contents == NULL) + return FALSE; + } + + if (htab->glink_eh_frame != NULL + && htab->glink_eh_frame->size != 0) + { + bfd_vma val; + bfd_byte *last_fde; + size_t last_fde_len, size, align, pad; + + p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size); + if (p == NULL) + return FALSE; + htab->glink_eh_frame->contents = p; + last_fde = p; + + htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size; + + memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); + /* CIE length (rewrite in case little-endian). */ + last_fde_len = sizeof (glink_eh_frame_cie) - 4; + bfd_put_32 (htab->elf.dynobj, last_fde_len, p); + p += sizeof (glink_eh_frame_cie); + + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + { + last_fde = p; + last_fde_len = 16; + /* FDE length. */ + bfd_put_32 (htab->elf.dynobj, 16, p); + p += 4; + /* CIE pointer. */ + val = p - htab->glink_eh_frame->contents; + bfd_put_32 (htab->elf.dynobj, val, p); + p += 4; + /* Offset to stub section. */ + val = (stub_sec->output_section->vma + + stub_sec->output_offset); + val -= (htab->glink_eh_frame->output_section->vma + + htab->glink_eh_frame->output_offset); + val -= p - htab->glink_eh_frame->contents; + if (val + 0x80000000 > 0xffffffff) + { + info->callbacks->einfo + (_("%P: %s offset too large for .eh_frame sdata4 encoding"), + stub_sec->name); + return FALSE; + } + bfd_put_32 (htab->elf.dynobj, val, p); + p += 4; + /* stub section size. */ + bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p); + p += 4; + /* Augmentation. */ + p += 1; + /* Pad. */ + p += 3; + } + if (htab->glink != NULL && htab->glink->size != 0) + { + last_fde = p; + last_fde_len = 20; + /* FDE length. */ + bfd_put_32 (htab->elf.dynobj, 20, p); + p += 4; + /* CIE pointer. */ + val = p - htab->glink_eh_frame->contents; + bfd_put_32 (htab->elf.dynobj, val, p); + p += 4; + /* Offset to .glink. */ + val = (htab->glink->output_section->vma + + htab->glink->output_offset + + 8); + val -= (htab->glink_eh_frame->output_section->vma + + htab->glink_eh_frame->output_offset); + val -= p - htab->glink_eh_frame->contents; + if (val + 0x80000000 > 0xffffffff) + { + info->callbacks->einfo + (_("%P: %s offset too large for .eh_frame sdata4 encoding"), + htab->glink->name); + return FALSE; + } + bfd_put_32 (htab->elf.dynobj, val, p); + p += 4; + /* .glink size. */ + bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p); + p += 4; + /* Augmentation. */ + p += 1; + + *p++ = DW_CFA_advance_loc + 1; + *p++ = DW_CFA_register; + *p++ = 65; + *p++ = 12; + *p++ = DW_CFA_advance_loc + 4; + *p++ = DW_CFA_restore_extended; + *p++ = 65; + } + /* Subsume any padding into the last FDE if user .eh_frame + sections are aligned more than glink_eh_frame. Otherwise any + zero padding will be seen as a terminator. */ + size = p - htab->glink_eh_frame->contents; + align = 1; + align <<= htab->glink_eh_frame->output_section->alignment_power; + align -= 1; + pad = ((size + align) & ~align) - size; + htab->glink_eh_frame->size = size + pad; + bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde); + } + + /* Build the stubs as directed by the stub hash table. */ + bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); + + if (htab->relbrlt != NULL) + htab->relbrlt->reloc_count = 0; + + if (htab->plt_stub_align != 0) + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1) + & (-1 << htab->plt_stub_align)); + + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + { + stub_sec_count += 1; + if (stub_sec->rawsize != stub_sec->size) + break; + } + + if (stub_sec != NULL + || htab->glink->rawsize != htab->glink->size + || (htab->glink_eh_frame != NULL + && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size)) + { + htab->stub_error = TRUE; + info->callbacks->einfo (_("%P: stubs don't match calculated size\n")); + } + + if (htab->stub_error) + return FALSE; + + if (stats != NULL) + { + *stats = bfd_malloc (500); + if (*stats == NULL) + return FALSE; + + sprintf (*stats, _("linker stubs in %u group%s\n" + " branch %lu\n" + " toc adjust %lu\n" + " long branch %lu\n" + " long toc adj %lu\n" + " plt call %lu\n" + " plt call toc %lu"), + stub_sec_count, + stub_sec_count == 1 ? "" : "s", + htab->stub_count[ppc_stub_long_branch - 1], + htab->stub_count[ppc_stub_long_branch_r2off - 1], + htab->stub_count[ppc_stub_plt_branch - 1], + htab->stub_count[ppc_stub_plt_branch_r2off - 1], + htab->stub_count[ppc_stub_plt_call - 1], + htab->stub_count[ppc_stub_plt_call_r2save - 1]); + } + return TRUE; +} + +/* This function undoes the changes made by add_symbol_adjust. */ + +static bfd_boolean +undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) +{ + struct ppc_link_hash_entry *eh; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + eh = (struct ppc_link_hash_entry *) h; + if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined) + return TRUE; + + eh->elf.root.type = bfd_link_hash_undefined; + return TRUE; +} + +void +ppc64_elf_restore_symbols (struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab != NULL) + elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info); +} + +/* What to do when ld finds relocations against symbols defined in + discarded sections. */ + +static unsigned int +ppc64_elf_action_discarded (asection *sec) +{ + if (strcmp (".opd", sec->name) == 0) + return 0; + + if (strcmp (".toc", sec->name) == 0) + return 0; + + if (strcmp (".toc1", sec->name) == 0) + return 0; + + return _bfd_elf_default_action_discarded (sec); +} + +/* The RELOCATE_SECTION function is called by the ELF backend linker + to handle the relocations for a section. + + The relocs are always passed as Rela structures; if the section + actually uses Rel structures, the r_addend field will always be + zero. + + This function is responsible for adjust the section contents as + necessary, and (if using Rela relocs and generating a + relocatable output file) adjusting the reloc addend as + necessary. + + This function does not have to worry about setting the reloc + address or the reloc symbol index. + + LOCAL_SYMS is a pointer to the swapped in local symbols. + + LOCAL_SECTIONS is an array giving the section in the input file + corresponding to the st_shndx field of each local symbol. + + The global hash table entry for the global symbols can be found + via elf_sym_hashes (input_bfd). + + When generating relocatable output, this function must handle + STB_LOCAL/STT_SECTION symbols specially. The output symbol is + going to be the section symbol corresponding to the output + section, which means that the addend must be adjusted + accordingly. */ + +static bfd_boolean +ppc64_elf_relocate_section (bfd *output_bfd, + struct bfd_link_info *info, + bfd *input_bfd, + asection *input_section, + bfd_byte *contents, + Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) +{ + struct ppc_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + Elf_Internal_Rela outrel; + bfd_byte *loc; + struct got_entry **local_got_ents; + bfd_vma TOCstart; + bfd_boolean ret = TRUE; + bfd_boolean is_opd; + /* Assume 'at' branch hints. */ + bfd_boolean is_isa_v2 = TRUE; + bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); + + /* Initialize howto table if needed. */ + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + ppc_howto_init (); + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + /* Don't relocate stub sections. */ + if (input_section->owner == htab->stub_bfd) + return TRUE; + + BFD_ASSERT (is_ppc64_elf (input_bfd)); + + local_got_ents = elf_local_got_ents (input_bfd); + TOCstart = elf_gp (output_bfd); + symtab_hdr = &elf_symtab_hdr (input_bfd); + sym_hashes = elf_sym_hashes (input_bfd); + is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + enum elf_ppc64_reloc_type r_type; + bfd_vma addend; + bfd_reloc_status_type r; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h_elf; + struct ppc_link_hash_entry *h; + struct ppc_link_hash_entry *fdh; + const char *sym_name; + unsigned long r_symndx, toc_symndx; + bfd_vma toc_addend; + unsigned char tls_mask, tls_gd, tls_type; + unsigned char sym_type; + bfd_vma relocation; + bfd_boolean unresolved_reloc; + bfd_boolean warned; + enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest; + unsigned int insn; + unsigned int mask; + struct ppc_stub_hash_entry *stub_entry; + bfd_vma max_br_offset; + bfd_vma from; + const Elf_Internal_Rela orig_rel = *rel; + + r_type = ELF64_R_TYPE (rel->r_info); + r_symndx = ELF64_R_SYM (rel->r_info); + + /* For old style R_PPC64_TOC relocs with a zero symbol, use the + symbol of the previous ADDR64 reloc. The symbol gives us the + proper TOC base to use. */ + if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) + && rel != relocs + && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64 + && is_opd) + r_symndx = ELF64_R_SYM (rel[-1].r_info); + + sym = NULL; + sec = NULL; + h_elf = NULL; + sym_name = NULL; + unresolved_reloc = FALSE; + warned = FALSE; + + if (r_symndx < symtab_hdr->sh_info) + { + /* It's a local symbol. */ + struct _opd_sec_data *opd; + + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); + sym_type = ELF64_ST_TYPE (sym->st_info); + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + opd = get_opd_info (sec); + if (opd != NULL && opd->adjust != NULL) + { + long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8]; + if (adjust == -1) + relocation = 0; + else + { + /* If this is a relocation against the opd section sym + and we have edited .opd, adjust the reloc addend so + that ld -r and ld --emit-relocs output is correct. + If it is a reloc against some other .opd symbol, + then the symbol value will be adjusted later. */ + if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) + rel->r_addend += adjust; + else + relocation += adjust; + } + } + } + else + { + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h_elf, sec, relocation, + unresolved_reloc, warned); + sym_name = h_elf->root.root.string; + sym_type = h_elf->type; + if (sec != NULL + && sec->owner == output_bfd + && strcmp (sec->name, ".opd") == 0) + { + /* This is a symbol defined in a linker script. All + such are defined in output sections, even those + defined by simple assignment from a symbol defined in + an input section. Transfer the symbol to an + appropriate input .opd section, so that a branch to + this symbol will be mapped to the location specified + by the opd entry. */ + struct bfd_link_order *lo; + for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next) + if (lo->type == bfd_indirect_link_order) + { + asection *isec = lo->u.indirect.section; + if (h_elf->root.u.def.value >= isec->output_offset + && h_elf->root.u.def.value < (isec->output_offset + + isec->size)) + { + h_elf->root.u.def.value -= isec->output_offset; + h_elf->root.u.def.section = isec; + sec = isec; + break; + } + } + } + } + h = (struct ppc_link_hash_entry *) h_elf; + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, + ppc64_elf_howto_table[r_type], 0, + contents); + + if (info->relocatable) + continue; + + if (h != NULL && &h->elf == htab->elf.hgot) + { + relocation = (TOCstart + + htab->stub_group[input_section->id].toc_off); + sec = bfd_abs_section_ptr; + unresolved_reloc = FALSE; + } + + /* TLS optimizations. Replace instruction sequences and relocs + based on information we collected in tls_optimize. We edit + RELOCS so that --emit-relocs will output something sensible + for the final instruction stream. */ + tls_mask = 0; + tls_gd = 0; + toc_symndx = 0; + if (h != NULL) + tls_mask = h->tls_mask; + else if (local_got_ents != NULL) + { + struct plt_entry **local_plt = (struct plt_entry **) + (local_got_ents + symtab_hdr->sh_info); + unsigned char *lgot_masks = (unsigned char *) + (local_plt + symtab_hdr->sh_info); + tls_mask = lgot_masks[r_symndx]; + } + if (tls_mask == 0 + && (r_type == R_PPC64_TLS + || r_type == R_PPC64_TLSGD + || r_type == R_PPC64_TLSLD)) + { + /* Check for toc tls entries. */ + unsigned char *toc_tls; + + if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, + &local_syms, rel, input_bfd)) + return FALSE; + + if (toc_tls) + tls_mask = *toc_tls; + } + + /* Check that tls relocs are used with tls syms, and non-tls + relocs are used with non-tls syms. */ + if (r_symndx != STN_UNDEF + && r_type != R_PPC64_NONE + && (h == NULL + || h->elf.root.type == bfd_link_hash_defined + || h->elf.root.type == bfd_link_hash_defweak) + && (IS_PPC64_TLS_RELOC (r_type) + != (sym_type == STT_TLS + || (sym_type == STT_SECTION + && (sec->flags & SEC_THREAD_LOCAL) != 0)))) + { + if (tls_mask != 0 + && (r_type == R_PPC64_TLS + || r_type == R_PPC64_TLSGD + || r_type == R_PPC64_TLSLD)) + /* R_PPC64_TLS is OK against a symbol in the TOC. */ + ; + else + info->callbacks->einfo + (!IS_PPC64_TLS_RELOC (r_type) + ? _("%P: %H: %s used with TLS symbol `%T'\n") + : _("%P: %H: %s used with non-TLS symbol `%T'\n"), + input_bfd, input_section, rel->r_offset, + ppc64_elf_howto_table[r_type]->name, + sym_name); + } + + /* Ensure reloc mapping code below stays sane. */ + if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 + || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 + || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) + || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) + || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) + || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) + || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) + || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) + || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) + || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) + abort (); + + switch (r_type) + { + default: + break; + + case R_PPC64_LO_DS_OPT: + insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); + if ((insn & (0x3f << 26)) != 58u << 26) + abort (); + insn += (14u << 26) - (58u << 26); + bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); + r_type = R_PPC64_TOC16_LO; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + break; + + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + { + /* Check for toc tls entries. */ + unsigned char *toc_tls; + int retval; + + retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, + &local_syms, rel, input_bfd); + if (retval == 0) + return FALSE; + + if (toc_tls) + { + tls_mask = *toc_tls; + if (r_type == R_PPC64_TOC16_DS + || r_type == R_PPC64_TOC16_LO_DS) + { + if (tls_mask != 0 + && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) + goto toctprel; + } + else + { + /* If we found a GD reloc pair, then we might be + doing a GD->IE transition. */ + if (retval == 2) + { + tls_gd = TLS_TPRELGD; + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + goto tls_ldgd_opt; + } + else if (retval == 3) + { + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + goto tls_ldgd_opt; + } + } + } + } + break; + + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + if (tls_mask != 0 + && (tls_mask & TLS_TPREL) == 0) + { + rel->r_offset -= d_offset; + bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); + r_type = R_PPC64_NONE; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + if (tls_mask != 0 + && (tls_mask & TLS_TPREL) == 0) + { + toctprel: + insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); + insn &= 31 << 21; + insn |= 0x3c0d0000; /* addis 0,13,0 */ + bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); + r_type = R_PPC64_TPREL16_HA; + if (toc_symndx != 0) + { + rel->r_info = ELF64_R_INFO (toc_symndx, r_type); + rel->r_addend = toc_addend; + /* We changed the symbol. Start over in order to + get h, sym, sec etc. right. */ + rel--; + continue; + } + else + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_TLS: + if (tls_mask != 0 + && (tls_mask & TLS_TPREL) == 0) + { + insn = bfd_get_32 (output_bfd, contents + rel->r_offset); + insn = _bfd_elf_ppc_at_tls_transform (insn, 13); + if (insn == 0) + abort (); + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + /* Was PPC64_TLS which sits on insn boundary, now + PPC64_TPREL16_LO which is at low-order half-word. */ + rel->r_offset += d_offset; + r_type = R_PPC64_TPREL16_LO; + if (toc_symndx != 0) + { + rel->r_info = ELF64_R_INFO (toc_symndx, r_type); + rel->r_addend = toc_addend; + /* We changed the symbol. Start over in order to + get h, sym, sec etc. right. */ + rel--; + continue; + } + else + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_gd = TLS_TPRELGD; + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + goto tls_gdld_hi; + break; + + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + { + tls_gdld_hi: + if ((tls_mask & tls_gd) != 0) + r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) + + R_PPC64_GOT_TPREL16_DS); + else + { + rel->r_offset -= d_offset; + bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); + r_type = R_PPC64_NONE; + } + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + tls_gd = TLS_TPRELGD; + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + goto tls_ldgd_opt; + break; + + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + { + unsigned int insn1, insn2, insn3; + bfd_vma offset; + + tls_ldgd_opt: + offset = (bfd_vma) -1; + /* If not using the newer R_PPC64_TLSGD/LD to mark + __tls_get_addr calls, we must trust that the call + stays with its arg setup insns, ie. that the next + reloc is the __tls_get_addr call associated with + the current reloc. Edit both insns. */ + if (input_section->has_tls_get_addr_call + && rel + 1 < relend + && branch_reloc_hash_match (input_bfd, rel + 1, + htab->tls_get_addr, + htab->tls_get_addr_fd)) + offset = rel[1].r_offset; + if ((tls_mask & tls_gd) != 0) + { + /* IE */ + insn1 = bfd_get_32 (output_bfd, + contents + rel->r_offset - d_offset); + insn1 &= (1 << 26) - (1 << 2); + insn1 |= 58 << 26; /* ld */ + insn2 = 0x7c636a14; /* add 3,3,13 */ + if (offset != (bfd_vma) -1) + rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); + if ((tls_mask & TLS_EXPLICIT) == 0) + r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) + + R_PPC64_GOT_TPREL16_DS); + else + r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + else + { + /* LE */ + insn1 = 0x3c6d0000; /* addis 3,13,0 */ + insn2 = 0x38630000; /* addi 3,3,0 */ + if (tls_gd == 0) + { + /* Was an LD reloc. */ + if (toc_symndx) + sec = local_sections[toc_symndx]; + for (r_symndx = 0; + r_symndx < symtab_hdr->sh_info; + r_symndx++) + if (local_sections[r_symndx] == sec) + break; + if (r_symndx >= symtab_hdr->sh_info) + r_symndx = STN_UNDEF; + rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; + if (r_symndx != STN_UNDEF) + rel->r_addend -= (local_syms[r_symndx].st_value + + sec->output_offset + + sec->output_section->vma); + } + else if (toc_symndx != 0) + { + r_symndx = toc_symndx; + rel->r_addend = toc_addend; + } + r_type = R_PPC64_TPREL16_HA; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + if (offset != (bfd_vma) -1) + { + rel[1].r_info = ELF64_R_INFO (r_symndx, + R_PPC64_TPREL16_LO); + rel[1].r_offset = offset + d_offset; + rel[1].r_addend = rel->r_addend; + } + } + bfd_put_32 (output_bfd, insn1, + contents + rel->r_offset - d_offset); + if (offset != (bfd_vma) -1) + { + insn3 = bfd_get_32 (output_bfd, + contents + offset + 4); + if (insn3 == NOP + || insn3 == CROR_151515 || insn3 == CROR_313131) + { + rel[1].r_offset += 4; + bfd_put_32 (output_bfd, insn2, contents + offset + 4); + insn2 = NOP; + } + bfd_put_32 (output_bfd, insn2, contents + offset); + } + if ((tls_mask & tls_gd) == 0 + && (tls_gd == 0 || toc_symndx != 0)) + { + /* We changed the symbol. Start over in order + to get h, sym, sec etc. right. */ + rel--; + continue; + } + } + break; + + case R_PPC64_TLSGD: + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + { + unsigned int insn2, insn3; + bfd_vma offset = rel->r_offset; + + if ((tls_mask & TLS_TPRELGD) != 0) + { + /* IE */ + r_type = R_PPC64_NONE; + insn2 = 0x7c636a14; /* add 3,3,13 */ + } + else + { + /* LE */ + if (toc_symndx != 0) + { + r_symndx = toc_symndx; + rel->r_addend = toc_addend; + } + r_type = R_PPC64_TPREL16_LO; + rel->r_offset = offset + d_offset; + insn2 = 0x38630000; /* addi 3,3,0 */ + } + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + /* Zap the reloc on the _tls_get_addr call too. */ + BFD_ASSERT (offset == rel[1].r_offset); + rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); + insn3 = bfd_get_32 (output_bfd, + contents + offset + 4); + if (insn3 == NOP + || insn3 == CROR_151515 || insn3 == CROR_313131) + { + rel->r_offset += 4; + bfd_put_32 (output_bfd, insn2, contents + offset + 4); + insn2 = NOP; + } + bfd_put_32 (output_bfd, insn2, contents + offset); + if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0) + { + rel--; + continue; + } + } + break; + + case R_PPC64_TLSLD: + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + { + unsigned int insn2, insn3; + bfd_vma offset = rel->r_offset; + + if (toc_symndx) + sec = local_sections[toc_symndx]; + for (r_symndx = 0; + r_symndx < symtab_hdr->sh_info; + r_symndx++) + if (local_sections[r_symndx] == sec) + break; + if (r_symndx >= symtab_hdr->sh_info) + r_symndx = STN_UNDEF; + rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; + if (r_symndx != STN_UNDEF) + rel->r_addend -= (local_syms[r_symndx].st_value + + sec->output_offset + + sec->output_section->vma); + + r_type = R_PPC64_TPREL16_LO; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + rel->r_offset = offset + d_offset; + /* Zap the reloc on the _tls_get_addr call too. */ + BFD_ASSERT (offset == rel[1].r_offset); + rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); + insn2 = 0x38630000; /* addi 3,3,0 */ + insn3 = bfd_get_32 (output_bfd, + contents + offset + 4); + if (insn3 == NOP + || insn3 == CROR_151515 || insn3 == CROR_313131) + { + rel->r_offset += 4; + bfd_put_32 (output_bfd, insn2, contents + offset + 4); + insn2 = NOP; + } + bfd_put_32 (output_bfd, insn2, contents + offset); + rel--; + continue; + } + break; + + case R_PPC64_DTPMOD64: + if (rel + 1 < relend + && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) + && rel[1].r_offset == rel->r_offset + 8) + { + if ((tls_mask & TLS_GD) == 0) + { + rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); + if ((tls_mask & TLS_TPRELGD) != 0) + r_type = R_PPC64_TPREL64; + else + { + bfd_put_64 (output_bfd, 1, contents + rel->r_offset); + r_type = R_PPC64_NONE; + } + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + } + else + { + if ((tls_mask & TLS_LD) == 0) + { + bfd_put_64 (output_bfd, 1, contents + rel->r_offset); + r_type = R_PPC64_NONE; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + } + break; + + case R_PPC64_TPREL64: + if ((tls_mask & TLS_TPREL) == 0) + { + r_type = R_PPC64_NONE; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + } + + /* Handle other relocations that tweak non-addend part of insn. */ + insn = 0; + max_br_offset = 1 << 25; + addend = rel->r_addend; + reloc_dest = DEST_NORMAL; + switch (r_type) + { + default: + break; + + case R_PPC64_TOCSAVE: + if (relocation + addend == (rel->r_offset + + input_section->output_offset + + input_section->output_section->vma) + && tocsave_find (htab, NO_INSERT, + &local_syms, rel, input_bfd)) + { + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + if (insn == NOP + || insn == CROR_151515 || insn == CROR_313131) + bfd_put_32 (input_bfd, STD_R2_40R1, + contents + rel->r_offset); + } + break; + + /* Branch taken prediction relocations. */ + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_REL14_BRTAKEN: + insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ + /* Fall thru. */ + + /* Branch not taken prediction relocations. */ + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_REL14_BRNTAKEN: + insn |= bfd_get_32 (output_bfd, + contents + rel->r_offset) & ~(0x01 << 21); + /* Fall thru. */ + + case R_PPC64_REL14: + max_br_offset = 1 << 15; + /* Fall thru. */ + + case R_PPC64_REL24: + /* Calls to functions with a different TOC, such as calls to + shared objects, need to alter the TOC pointer. This is + done using a linkage stub. A REL24 branching to these + linkage stubs needs to be followed by a nop, as the nop + will be replaced with an instruction to restore the TOC + base pointer. */ + fdh = h; + if (h != NULL + && h->oh != NULL + && h->oh->is_func_descriptor) + fdh = ppc_follow_link (h->oh); + stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel, + htab); + if (stub_entry != NULL + && (stub_entry->stub_type == ppc_stub_plt_call + || stub_entry->stub_type == ppc_stub_plt_call_r2save + || stub_entry->stub_type == ppc_stub_plt_branch_r2off + || stub_entry->stub_type == ppc_stub_long_branch_r2off)) + { + bfd_boolean can_plt_call = FALSE; + + /* All of these stubs will modify r2, so there must be a + branch and link followed by a nop. The nop is + replaced by an insn to restore r2. */ + if (rel->r_offset + 8 <= input_section->size) + { + unsigned long br; + + br = bfd_get_32 (input_bfd, + contents + rel->r_offset); + if ((br & 1) != 0) + { + unsigned long nop; + + nop = bfd_get_32 (input_bfd, + contents + rel->r_offset + 4); + if (nop == NOP + || nop == CROR_151515 || nop == CROR_313131) + { + if (h != NULL + && (h == htab->tls_get_addr_fd + || h == htab->tls_get_addr) + && !htab->no_tls_get_addr_opt) + { + /* Special stub used, leave nop alone. */ + } + else + bfd_put_32 (input_bfd, LD_R2_40R1, + contents + rel->r_offset + 4); + can_plt_call = TRUE; + } + } + } + + if (!can_plt_call && h != NULL) + { + const char *name = h->elf.root.root.string; + + if (*name == '.') + ++name; + + if (strncmp (name, "__libc_start_main", 17) == 0 + && (name[17] == 0 || name[17] == '@')) + { + /* Allow crt1 branch to go via a toc adjusting + stub. Other calls that never return could do + the same, if we could detect such. */ + can_plt_call = TRUE; + } + } + + if (!can_plt_call) + { + /* g++ as of 20130507 emits self-calls without a + following nop. This is arguably wrong since we + have conflicting information. On the one hand a + global symbol and on the other a local call + sequence, but don't error for this special case. + It isn't possible to cheaply verify we have + exactly such a call. Allow all calls to the same + section. */ + asection *code_sec = sec; + + if (get_opd_info (sec) != NULL) + { + bfd_vma off = (relocation + addend + - sec->output_section->vma + - sec->output_offset); + + opd_entry_value (sec, off, &code_sec, NULL, FALSE); + } + if (code_sec == input_section) + can_plt_call = TRUE; + } + + if (!can_plt_call) + { + info->callbacks->einfo + (_("%P: %H: call to `%T' lacks nop, can't restore toc; " + "recompile with -fPIC"), + input_bfd, input_section, rel->r_offset, sym_name); + + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + } + + if (can_plt_call + && (stub_entry->stub_type == ppc_stub_plt_call + || stub_entry->stub_type == ppc_stub_plt_call_r2save)) + unresolved_reloc = FALSE; + } + + if ((stub_entry == NULL + || stub_entry->stub_type == ppc_stub_long_branch + || stub_entry->stub_type == ppc_stub_plt_branch) + && get_opd_info (sec) != NULL) + { + /* The branch destination is the value of the opd entry. */ + bfd_vma off = (relocation + addend + - sec->output_section->vma + - sec->output_offset); + bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE); + if (dest != (bfd_vma) -1) + { + relocation = dest; + addend = 0; + reloc_dest = DEST_OPD; + } + } + + /* If the branch is out of reach we ought to have a long + branch stub. */ + from = (rel->r_offset + + input_section->output_offset + + input_section->output_section->vma); + + if (stub_entry != NULL + && (stub_entry->stub_type == ppc_stub_long_branch + || stub_entry->stub_type == ppc_stub_plt_branch) + && (r_type == R_PPC64_ADDR14_BRTAKEN + || r_type == R_PPC64_ADDR14_BRNTAKEN + || (relocation + addend - from + max_br_offset + < 2 * max_br_offset))) + /* Don't use the stub if this branch is in range. */ + stub_entry = NULL; + + if (stub_entry != NULL) + { + /* Munge up the value and addend so that we call the stub + rather than the procedure directly. */ + relocation = (stub_entry->stub_offset + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + addend = 0; + reloc_dest = DEST_STUB; + + if ((stub_entry->stub_type == ppc_stub_plt_call + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + && (ALWAYS_EMIT_R2SAVE + || stub_entry->stub_type == ppc_stub_plt_call_r2save) + && rel + 1 < relend + && rel[1].r_offset == rel->r_offset + 4 + && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE) + relocation += 4; + } + + if (insn != 0) + { + if (is_isa_v2) + { + /* Set 'a' bit. This is 0b00010 in BO field for branch + on CR(BI) insns (BO == 001at or 011at), and 0b01000 + for branch on CTR insns (BO == 1a00t or 1a01t). */ + if ((insn & (0x14 << 21)) == (0x04 << 21)) + insn |= 0x02 << 21; + else if ((insn & (0x14 << 21)) == (0x10 << 21)) + insn |= 0x08 << 21; + else + break; + } + else + { + /* Invert 'y' bit if not the default. */ + if ((bfd_signed_vma) (relocation + addend - from) < 0) + insn ^= 0x01 << 21; + } + + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + } + + /* NOP out calls to undefined weak functions. + We can thus call a weak function without first + checking whether the function is defined. */ + else if (h != NULL + && h->elf.root.type == bfd_link_hash_undefweak + && h->elf.dynindx == -1 + && r_type == R_PPC64_REL24 + && relocation == 0 + && addend == 0) + { + bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); + continue; + } + break; + } + + /* Set `addend'. */ + tls_type = 0; + switch (r_type) + { + default: + info->callbacks->einfo + (_("%P: %B: unknown relocation type %d for `%T'\n"), + input_bfd, (int) r_type, sym_name); + + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + continue; + + case R_PPC64_NONE: + case R_PPC64_TLS: + case R_PPC64_TLSGD: + case R_PPC64_TLSLD: + case R_PPC64_TOCSAVE: + case R_PPC64_GNU_VTINHERIT: + case R_PPC64_GNU_VTENTRY: + continue; + + /* GOT16 relocations. Like an ADDR16 using the symbol's + address in the GOT as relocation value instead of the + symbol's value itself. Also, create a GOT entry for the + symbol and put the symbol value there. */ + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogot; + + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + tls_type = TLS_TLS | TLS_LD; + goto dogot; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + tls_type = TLS_TLS | TLS_TPREL; + goto dogot; + + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + goto dogot; + + case R_PPC64_GOT16: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_LO_DS: + dogot: + { + /* Relocation is to the entry for this symbol in the global + offset table. */ + asection *got; + bfd_vma *offp; + bfd_vma off; + unsigned long indx = 0; + struct got_entry *ent; + + if (tls_type == (TLS_TLS | TLS_LD) + && (h == NULL + || !h->elf.def_dynamic)) + ent = ppc64_tlsld_got (input_bfd); + else + { + + if (h != NULL) + { + bfd_boolean dyn = htab->elf.dynamic_sections_created; + if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, + &h->elf) + || (info->shared + && SYMBOL_CALLS_LOCAL (info, &h->elf))) + /* This is actually a static link, or it is a + -Bsymbolic link and the symbol is defined + locally, or the symbol was forced to be local + because of a version file. */ + ; + else + { + BFD_ASSERT (h->elf.dynindx != -1); + indx = h->elf.dynindx; + unresolved_reloc = FALSE; + } + ent = h->elf.got.glist; + } + else + { + if (local_got_ents == NULL) + abort (); + ent = local_got_ents[r_symndx]; + } + + for (; ent != NULL; ent = ent->next) + if (ent->addend == orig_rel.r_addend + && ent->owner == input_bfd + && ent->tls_type == tls_type) + break; + } + + if (ent == NULL) + abort (); + if (ent->is_indirect) + ent = ent->got.ent; + offp = &ent->got.offset; + got = ppc64_elf_tdata (ent->owner)->got; + if (got == NULL) + abort (); + + /* The offset must always be a multiple of 8. We use the + least significant bit to record whether we have already + processed this entry. */ + off = *offp; + if ((off & 1) != 0) + off &= ~1; + else + { + /* Generate relocs for the dynamic linker, except in + the case of TLSLD where we'll use one entry per + module. */ + asection *relgot; + bfd_boolean ifunc; + + *offp = off | 1; + relgot = NULL; + ifunc = (h != NULL + ? h->elf.type == STT_GNU_IFUNC + : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC); + if (ifunc) + relgot = htab->reliplt; + else if ((info->shared || indx != 0) + && (h == NULL + || (tls_type == (TLS_TLS | TLS_LD) + && !h->elf.def_dynamic) + || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT + || h->elf.root.type != bfd_link_hash_undefweak)) + relgot = ppc64_elf_tdata (ent->owner)->relgot; + if (relgot != NULL) + { + outrel.r_offset = (got->output_section->vma + + got->output_offset + + off); + outrel.r_addend = addend; + if (tls_type & (TLS_LD | TLS_GD)) + { + outrel.r_addend = 0; + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); + if (tls_type == (TLS_TLS | TLS_GD)) + { + loc = relgot->contents; + loc += (relgot->reloc_count++ + * sizeof (Elf64_External_Rela)); + bfd_elf64_swap_reloca_out (output_bfd, + &outrel, loc); + outrel.r_offset += 8; + outrel.r_addend = addend; + outrel.r_info + = ELF64_R_INFO (indx, R_PPC64_DTPREL64); + } + } + else if (tls_type == (TLS_TLS | TLS_DTPREL)) + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); + else if (tls_type == (TLS_TLS | TLS_TPREL)) + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); + else if (indx != 0) + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); + else + { + if (ifunc) + outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); + else + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + + /* Write the .got section contents for the sake + of prelink. */ + loc = got->contents + off; + bfd_put_64 (output_bfd, outrel.r_addend + relocation, + loc); + } + + if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) + { + outrel.r_addend += relocation; + if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) + outrel.r_addend -= htab->elf.tls_sec->vma; + } + loc = relgot->contents; + loc += (relgot->reloc_count++ + * sizeof (Elf64_External_Rela)); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + + /* Init the .got section contents here if we're not + emitting a reloc. */ + else + { + relocation += addend; + if (tls_type == (TLS_TLS | TLS_LD)) + relocation = 1; + else if (tls_type != 0) + { + relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; + if (tls_type == (TLS_TLS | TLS_TPREL)) + relocation += DTP_OFFSET - TP_OFFSET; + + if (tls_type == (TLS_TLS | TLS_GD)) + { + bfd_put_64 (output_bfd, relocation, + got->contents + off + 8); + relocation = 1; + } + } + + bfd_put_64 (output_bfd, relocation, + got->contents + off); + } + } + + if (off >= (bfd_vma) -2) + abort (); + + relocation = got->output_section->vma + got->output_offset + off; + addend = -(TOCstart + htab->stub_group[input_section->id].toc_off); + } + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + /* Relocation is to the entry for this symbol in the + procedure linkage table. */ + + /* Resolve a PLT reloc against a local symbol directly, + without using the procedure linkage table. */ + if (h == NULL) + break; + + /* It's possible that we didn't make a PLT entry for this + symbol. This happens when statically linking PIC code, + or when using -Bsymbolic. Go find a match if there is a + PLT entry. */ + if (htab->plt != NULL) + { + struct plt_entry *ent; + for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == orig_rel.r_addend + && ent->plt.offset != (bfd_vma) -1) + { + relocation = (htab->plt->output_section->vma + + htab->plt->output_offset + + ent->plt.offset); + unresolved_reloc = FALSE; + } + } + break; + + case R_PPC64_TOC: + /* Relocation value is TOC base. */ + relocation = TOCstart; + if (r_symndx == STN_UNDEF) + relocation += htab->stub_group[input_section->id].toc_off; + else if (unresolved_reloc) + ; + else if (sec != NULL && sec->id <= htab->top_id) + relocation += htab->stub_group[sec->id].toc_off; + else + unresolved_reloc = TRUE; + goto dodyn; + + /* TOC16 relocs. We want the offset relative to the TOC base, + which is the address of the start of the TOC plus 0x8000. + The TOC consists of sections .got, .toc, .tocbss, and .plt, + in this order. */ + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + case R_PPC64_TOC16_HA: + addend -= TOCstart + htab->stub_group[input_section->id].toc_off; + break; + + /* Relocate against the beginning of the section. */ + case R_PPC64_SECTOFF: + case R_PPC64_SECTOFF_LO: + case R_PPC64_SECTOFF_HI: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_SECTOFF_HA: + if (sec != NULL) + addend -= sec->output_section->vma; + break; + + case R_PPC64_REL16: + case R_PPC64_REL16_LO: + case R_PPC64_REL16_HI: + case R_PPC64_REL16_HA: + break; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL24: + break; + + case R_PPC64_TPREL16: + case R_PPC64_TPREL16_LO: + case R_PPC64_TPREL16_HI: + case R_PPC64_TPREL16_HA: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + if (h != NULL + && h->elf.root.type == bfd_link_hash_undefweak + && h->elf.dynindx == -1) + { + /* Make this relocation against an undefined weak symbol + resolve to zero. This is really just a tweak, since + code using weak externs ought to check that they are + defined before using them. */ + bfd_byte *p = contents + rel->r_offset - d_offset; + + insn = bfd_get_32 (output_bfd, p); + insn = _bfd_elf_ppc_at_tprel_transform (insn, 13); + if (insn != 0) + bfd_put_32 (output_bfd, insn, p); + break; + } + addend -= htab->elf.tls_sec->vma + TP_OFFSET; + if (info->shared) + /* The TPREL16 relocs shouldn't really be used in shared + libs as they will result in DT_TEXTREL being set, but + support them anyway. */ + goto dodyn; + break; + + case R_PPC64_DTPREL16: + case R_PPC64_DTPREL16_LO: + case R_PPC64_DTPREL16_HI: + case R_PPC64_DTPREL16_HA: + case R_PPC64_DTPREL16_DS: + case R_PPC64_DTPREL16_LO_DS: + case R_PPC64_DTPREL16_HIGHER: + case R_PPC64_DTPREL16_HIGHERA: + case R_PPC64_DTPREL16_HIGHEST: + case R_PPC64_DTPREL16_HIGHESTA: + addend -= htab->elf.tls_sec->vma + DTP_OFFSET; + break; + + case R_PPC64_DTPMOD64: + relocation = 1; + addend = 0; + goto dodyn; + + case R_PPC64_TPREL64: + addend -= htab->elf.tls_sec->vma + TP_OFFSET; + goto dodyn; + + case R_PPC64_DTPREL64: + addend -= htab->elf.tls_sec->vma + DTP_OFFSET; + /* Fall thru */ + + /* Relocations that may need to be propagated if this is a + dynamic object. */ + case R_PPC64_REL30: + case R_PPC64_REL32: + case R_PPC64_REL64: + case R_PPC64_ADDR14: + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_ADDR16: + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_HA: + case R_PPC64_ADDR16_HI: + case R_PPC64_ADDR16_HIGHER: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHEST: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_ADDR16_LO: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_ADDR24: + case R_PPC64_ADDR32: + case R_PPC64_ADDR64: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + dodyn: + if ((input_section->flags & SEC_ALLOC) == 0) + break; + + if (NO_OPD_RELOCS && is_opd) + break; + + if ((info->shared + && (h == NULL + || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT + || h->elf.root.type != bfd_link_hash_undefweak) + && (must_be_dyn_reloc (info, r_type) + || !SYMBOL_CALLS_LOCAL (info, &h->elf))) + || (ELIMINATE_COPY_RELOCS + && !info->shared + && h != NULL + && h->elf.dynindx != -1 + && !h->elf.non_got_ref + && !h->elf.def_regular) + || (!info->shared + && (h != NULL + ? h->elf.type == STT_GNU_IFUNC + : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))) + { + bfd_boolean skip, relocate; + asection *sreloc; + bfd_vma out_off; + + /* When generating a dynamic object, these relocations + are copied into the output file to be resolved at run + time. */ + + skip = FALSE; + relocate = FALSE; + + out_off = _bfd_elf_section_offset (output_bfd, info, + input_section, rel->r_offset); + if (out_off == (bfd_vma) -1) + skip = TRUE; + else if (out_off == (bfd_vma) -2) + skip = TRUE, relocate = TRUE; + out_off += (input_section->output_section->vma + + input_section->output_offset); + outrel.r_offset = out_off; + outrel.r_addend = rel->r_addend; + + /* Optimize unaligned reloc use. */ + if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) + || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) + r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; + else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) + || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) + r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; + else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) + || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) + r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; + + if (skip) + memset (&outrel, 0, sizeof outrel); + else if (!SYMBOL_CALLS_LOCAL (info, &h->elf) + && !is_opd + && r_type != R_PPC64_TOC) + { + BFD_ASSERT (h->elf.dynindx != -1); + outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type); + } + else + { + /* This symbol is local, or marked to become local, + or this is an opd section reloc which must point + at a local function. */ + outrel.r_addend += relocation; + if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) + { + if (is_opd && h != NULL) + { + /* Lie about opd entries. This case occurs + when building shared libraries and we + reference a function in another shared + lib. The same thing happens for a weak + definition in an application that's + overridden by a strong definition in a + shared lib. (I believe this is a generic + bug in binutils handling of weak syms.) + In these cases we won't use the opd + entry in this lib. */ + unresolved_reloc = FALSE; + } + if (!is_opd + && r_type == R_PPC64_ADDR64 + && (h != NULL + ? h->elf.type == STT_GNU_IFUNC + : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) + outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); + else + { + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + + /* We need to relocate .opd contents for ld.so. + Prelink also wants simple and consistent rules + for relocs. This make all RELATIVE relocs have + *r_offset equal to r_addend. */ + relocate = TRUE; + } + } + else + { + long indx = 0; + + if (h != NULL + ? h->elf.type == STT_GNU_IFUNC + : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) + { + info->callbacks->einfo + (_("%P: %H: %s for indirect " + "function `%T' unsupported\n"), + input_bfd, input_section, rel->r_offset, + ppc64_elf_howto_table[r_type]->name, + sym_name); + ret = FALSE; + } + else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) + ; + else if (sec == NULL || sec->owner == NULL) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + else + { + asection *osec; + + osec = sec->output_section; + indx = elf_section_data (osec)->dynindx; + + if (indx == 0) + { + if ((osec->flags & SEC_READONLY) == 0 + && htab->elf.data_index_section != NULL) + osec = htab->elf.data_index_section; + else + osec = htab->elf.text_index_section; + indx = elf_section_data (osec)->dynindx; + } + BFD_ASSERT (indx != 0); + + /* We are turning this relocation into one + against a section symbol, so subtract out + the output section's address but not the + offset of the input section in the output + section. */ + outrel.r_addend -= osec->vma; + } + + outrel.r_info = ELF64_R_INFO (indx, r_type); + } + } + + sreloc = elf_section_data (input_section)->sreloc; + if (h != NULL + ? h->elf.type == STT_GNU_IFUNC + : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) + sreloc = htab->reliplt; + if (sreloc == NULL) + abort (); + + if (sreloc->reloc_count * sizeof (Elf64_External_Rela) + >= sreloc->size) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + + /* If this reloc is against an external symbol, it will + be computed at runtime, so there's no need to do + anything now. However, for the sake of prelink ensure + that the section contents are a known value. */ + if (! relocate) + { + unresolved_reloc = FALSE; + /* The value chosen here is quite arbitrary as ld.so + ignores section contents except for the special + case of .opd where the contents might be accessed + before relocation. Choose zero, as that won't + cause reloc overflow. */ + relocation = 0; + addend = 0; + /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs + to improve backward compatibility with older + versions of ld. */ + if (r_type == R_PPC64_ADDR64) + addend = outrel.r_addend; + /* Adjust pc_relative relocs to have zero in *r_offset. */ + else if (ppc64_elf_howto_table[r_type]->pc_relative) + addend = (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + } + } + break; + + case R_PPC64_COPY: + case R_PPC64_GLOB_DAT: + case R_PPC64_JMP_SLOT: + case R_PPC64_JMP_IREL: + case R_PPC64_RELATIVE: + /* We shouldn't ever see these dynamic relocs in relocatable + files. */ + /* Fall through. */ + + case R_PPC64_PLTGOT16: + case R_PPC64_PLTGOT16_DS: + case R_PPC64_PLTGOT16_HA: + case R_PPC64_PLTGOT16_HI: + case R_PPC64_PLTGOT16_LO: + case R_PPC64_PLTGOT16_LO_DS: + case R_PPC64_PLTREL32: + case R_PPC64_PLTREL64: + /* These ones haven't been implemented yet. */ + + info->callbacks->einfo + (_("%P: %B: %s is not supported for `%T'\n"), + input_bfd, + ppc64_elf_howto_table[r_type]->name, sym_name); + + bfd_set_error (bfd_error_invalid_operation); + ret = FALSE; + continue; + } + + /* Multi-instruction sequences that access the TOC can be + optimized, eg. addis ra,r2,0; addi rb,ra,x; + to nop; addi rb,r2,x; */ + switch (r_type) + { + default: + break; + + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT16_HI: + case R_PPC64_TOC16_HI: + /* These relocs would only be useful if building up an + offset to later add to r2, perhaps in an indexed + addressing mode instruction. Don't try to optimize. + Unfortunately, the possibility of someone building up an + offset like this or even with the HA relocs, means that + we need to check the high insn when optimizing the low + insn. */ + break; + + case R_PPC64_GOT_TLSLD16_HA: + case R_PPC64_GOT_TLSGD16_HA: + case R_PPC64_GOT_TPREL16_HA: + case R_PPC64_GOT_DTPREL16_HA: + case R_PPC64_GOT16_HA: + case R_PPC64_TOC16_HA: + if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 + && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) + { + bfd_byte *p = contents + (rel->r_offset & ~3); + bfd_put_32 (input_bfd, NOP, p); + } + break; + + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_LO_DS: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_LO_DS: + if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 + && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) + { + bfd_byte *p = contents + (rel->r_offset & ~3); + insn = bfd_get_32 (input_bfd, p); + if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) + { + /* Transform addic to addi when we change reg. */ + insn &= ~((0x3f << 26) | (0x1f << 16)); + insn |= (14u << 26) | (2 << 16); + } + else + { + insn &= ~(0x1f << 16); + insn |= 2 << 16; + } + bfd_put_32 (input_bfd, insn, p); + } + break; + } + + /* Do any further special processing. */ + switch (r_type) + { + default: + break; + + case R_PPC64_ADDR16_HA: + case R_PPC64_REL16_HA: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_TOC16_HA: + case R_PPC64_SECTOFF_HA: + case R_PPC64_TPREL16_HA: + case R_PPC64_DTPREL16_HA: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + case R_PPC64_DTPREL16_HIGHER: + case R_PPC64_DTPREL16_HIGHERA: + case R_PPC64_DTPREL16_HIGHEST: + case R_PPC64_DTPREL16_HIGHESTA: + /* It's just possible that this symbol is a weak symbol + that's not actually defined anywhere. In that case, + 'sec' would be NULL, and we should leave the symbol + alone (it will be set to zero elsewhere in the link). */ + if (sec == NULL) + break; + /* Fall thru */ + + case R_PPC64_GOT16_HA: + case R_PPC64_PLTGOT16_HA: + case R_PPC64_PLT16_HA: + case R_PPC64_GOT_TLSGD16_HA: + case R_PPC64_GOT_TLSLD16_HA: + case R_PPC64_GOT_TPREL16_HA: + case R_PPC64_GOT_DTPREL16_HA: + /* Add 0x10000 if sign bit in 0:15 is set. + Bits 0:15 are not used. */ + addend += 0x8000; + break; + + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_LO_DS: + case R_PPC64_PLT16_LO_DS: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + case R_PPC64_PLTGOT16_DS: + case R_PPC64_PLTGOT16_LO_DS: + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_DTPREL16_DS: + case R_PPC64_DTPREL16_LO_DS: + insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); + mask = 3; + /* If this reloc is against an lq insn, then the value must be + a multiple of 16. This is somewhat of a hack, but the + "correct" way to do this by defining _DQ forms of all the + _DS relocs bloats all reloc switches in this file. It + doesn't seem to make much sense to use any of these relocs + in data, so testing the insn should be safe. */ + if ((insn & (0x3f << 26)) == (56u << 26)) + mask = 15; + if (((relocation + addend) & mask) != 0) + { + info->callbacks->einfo + (_("%P: %H: error: %s not a multiple of %u\n"), + input_bfd, input_section, rel->r_offset, + ppc64_elf_howto_table[r_type]->name, + mask + 1); + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + continue; + } + break; + } + + /* Dynamic relocs are not propagated for SEC_DEBUGGING sections + because such sections are not SEC_ALLOC and thus ld.so will + not process them. */ + if (unresolved_reloc + && !((input_section->flags & SEC_DEBUGGING) != 0 + && h->elf.def_dynamic) + && _bfd_elf_section_offset (output_bfd, info, input_section, + rel->r_offset) != (bfd_vma) -1) + { + info->callbacks->einfo + (_("%P: %H: unresolvable %s against `%T'\n"), + input_bfd, input_section, rel->r_offset, + ppc64_elf_howto_table[(int) r_type]->name, + h->elf.root.root.string); + ret = FALSE; + } + + r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], + input_bfd, + input_section, + contents, + rel->r_offset, + relocation, + addend); + + if (r != bfd_reloc_ok) + { + char *more_info = NULL; + const char *reloc_name = ppc64_elf_howto_table[r_type]->name; + + if (reloc_dest != DEST_NORMAL) + { + more_info = bfd_malloc (strlen (reloc_name) + 8); + if (more_info != NULL) + { + strcpy (more_info, reloc_name); + strcat (more_info, (reloc_dest == DEST_OPD + ? " (OPD)" : " (stub)")); + reloc_name = more_info; + } + } + + if (r == bfd_reloc_overflow) + { + if (warned) + continue; + if (h != NULL + && h->elf.root.type == bfd_link_hash_undefweak + && ppc64_elf_howto_table[r_type]->pc_relative) + { + /* Assume this is a call protected by other code that + detects the symbol is undefined. If this is the case, + we can safely ignore the overflow. If not, the + program is hosed anyway, and a little warning isn't + going to help. */ + + continue; + } + + if (!((*info->callbacks->reloc_overflow) + (info, &h->elf.root, sym_name, + reloc_name, orig_rel.r_addend, + input_bfd, input_section, rel->r_offset))) + return FALSE; + } + else + { + info->callbacks->einfo + (_("%P: %H: %s against `%T': error %d\n"), + input_bfd, input_section, rel->r_offset, + reloc_name, sym_name, (int) r); + ret = FALSE; + } + if (more_info != NULL) + free (more_info); + } + } + + /* If we're emitting relocations, then shortly after this function + returns, reloc offsets and addends for this section will be + adjusted. Worse, reloc symbol indices will be for the output + file rather than the input. Save a copy of the relocs for + opd_entry_value. */ + if (is_opd && (info->emitrelocations || info->relocatable)) + { + bfd_size_type amt; + amt = input_section->reloc_count * sizeof (Elf_Internal_Rela); + rel = bfd_alloc (input_bfd, amt); + BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL); + ppc64_elf_tdata (input_bfd)->opd.relocs = rel; + if (rel == NULL) + return FALSE; + memcpy (rel, relocs, amt); + } + return ret; +} + +/* Adjust the value of any local symbols in opd sections. */ + +static int +ppc64_elf_output_symbol_hook (struct bfd_link_info *info, + const char *name ATTRIBUTE_UNUSED, + Elf_Internal_Sym *elfsym, + asection *input_sec, + struct elf_link_hash_entry *h) +{ + struct _opd_sec_data *opd; + long adjust; + bfd_vma value; + + if (h != NULL) + return 1; + + opd = get_opd_info (input_sec); + if (opd == NULL || opd->adjust == NULL) + return 1; + + value = elfsym->st_value - input_sec->output_offset; + if (!info->relocatable) + value -= input_sec->output_section->vma; + + adjust = opd->adjust[value / 8]; + if (adjust == -1) + return 2; + + elfsym->st_value += adjust; + return 1; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) +{ + struct ppc_link_hash_table *htab; + struct plt_entry *ent; + Elf_Internal_Rela rela; + bfd_byte *loc; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.offset != (bfd_vma) -1) + { + /* This symbol has an entry in the procedure linkage + table. Set it up. */ + if (!htab->elf.dynamic_sections_created + || h->dynindx == -1) + { + BFD_ASSERT (h->type == STT_GNU_IFUNC + && h->def_regular + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)); + rela.r_offset = (htab->iplt->output_section->vma + + htab->iplt->output_offset + + ent->plt.offset); + rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); + rela.r_addend = (h->root.u.def.value + + h->root.u.def.section->output_offset + + h->root.u.def.section->output_section->vma + + ent->addend); + loc = (htab->reliplt->contents + + (htab->reliplt->reloc_count++ + * sizeof (Elf64_External_Rela))); + } + else + { + rela.r_offset = (htab->plt->output_section->vma + + htab->plt->output_offset + + ent->plt.offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); + rela.r_addend = ent->addend; + loc = (htab->relplt->contents + + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) + / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela)))); + } + bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); + } + + if (h->needs_copy) + { + /* This symbol needs a copy reloc. Set it up. */ + + if (h->dynindx == -1 + || (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + || htab->relbss == NULL) + abort (); + + rela.r_offset = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); + rela.r_addend = 0; + loc = htab->relbss->contents; + loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); + } + + return TRUE; +} + +/* Used to decide how to sort relocs in an optimal manner for the + dynamic linker, before writing them out. */ + +static enum elf_reloc_type_class +ppc64_elf_reloc_type_class (const struct bfd_link_info *info, + const asection *rel_sec, + const Elf_Internal_Rela *rela) +{ + enum elf_ppc64_reloc_type r_type; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (rel_sec == htab->reliplt) + return reloc_class_ifunc; + + r_type = ELF64_R_TYPE (rela->r_info); + switch (r_type) + { + case R_PPC64_RELATIVE: + return reloc_class_relative; + case R_PPC64_JMP_SLOT: + return reloc_class_plt; + case R_PPC64_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } +} + +/* Finish up the dynamic sections. */ + +static bfd_boolean +ppc64_elf_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + bfd *dynobj; + asection *sdyn; + + htab = ppc_hash_table (info); + if (htab == NULL) + return FALSE; + + dynobj = htab->elf.dynobj; + sdyn = bfd_get_linker_section (dynobj, ".dynamic"); + + if (htab->elf.dynamic_sections_created) + { + Elf64_External_Dyn *dyncon, *dynconend; + + if (sdyn == NULL || htab->got == NULL) + abort (); + + dyncon = (Elf64_External_Dyn *) sdyn->contents; + dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + asection *s; + + bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + continue; + + case DT_PPC64_GLINK: + s = htab->glink; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + /* We stupidly defined DT_PPC64_GLINK to be the start + of glink rather than the first entry point, which is + what ld.so needs, and now have a bigger stub to + support automatic multiple TOCs. */ + dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32; + break; + + case DT_PPC64_OPD: + s = bfd_get_section_by_name (output_bfd, ".opd"); + if (s == NULL) + continue; + dyn.d_un.d_ptr = s->vma; + break; + + case DT_PPC64_OPDSZ: + s = bfd_get_section_by_name (output_bfd, ".opd"); + if (s == NULL) + continue; + dyn.d_un.d_val = s->size; + break; + + case DT_PLTGOT: + s = htab->plt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + break; + + case DT_JMPREL: + s = htab->relplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + break; + + case DT_PLTRELSZ: + dyn.d_un.d_val = htab->relplt->size; + break; + + case DT_RELASZ: + /* Don't count procedure linkage table relocs in the + overall reloc count. */ + s = htab->relplt; + if (s == NULL) + continue; + dyn.d_un.d_val -= s->size; + break; + + case DT_RELA: + /* We may not be using the standard ELF linker script. + If .rela.plt is the first .rela section, we adjust + DT_RELA to not include it. */ + s = htab->relplt; + if (s == NULL) + continue; + if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) + continue; + dyn.d_un.d_ptr += s->size; + break; + } + + bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); + } + } + + if (htab->got != NULL && htab->got->size != 0) + { + /* Fill in the first entry in the global offset table. + We use it to hold the link-time TOCbase. */ + bfd_put_64 (output_bfd, + elf_gp (output_bfd) + TOC_BASE_OFF, + htab->got->contents); + + /* Set .got entry size. */ + elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8; + } + + if (htab->plt != NULL && htab->plt->size != 0) + { + /* Set .plt entry size. */ + elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize + = PLT_ENTRY_SIZE; + } + + /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for + brlt ourselves if emitrelocations. */ + if (htab->brlt != NULL + && htab->brlt->reloc_count != 0 + && !_bfd_elf_link_output_relocs (output_bfd, + htab->brlt, + elf_section_data (htab->brlt)->rela.hdr, + elf_section_data (htab->brlt)->relocs, + NULL)) + return FALSE; + + if (htab->glink != NULL + && htab->glink->reloc_count != 0 + && !_bfd_elf_link_output_relocs (output_bfd, + htab->glink, + elf_section_data (htab->glink)->rela.hdr, + elf_section_data (htab->glink)->relocs, + NULL)) + return FALSE; + + + if (htab->glink_eh_frame != NULL + && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME + && !_bfd_elf_write_section_eh_frame (output_bfd, info, + htab->glink_eh_frame, + htab->glink_eh_frame->contents)) + return FALSE; + + /* We need to handle writing out multiple GOT sections ourselves, + since we didn't add them to DYNOBJ. We know dynobj is the first + bfd. */ + while ((dynobj = dynobj->link_next) != NULL) + { + asection *s; + + if (!is_ppc64_elf (dynobj)) + continue; + + s = ppc64_elf_tdata (dynobj)->got; + if (s != NULL + && s->size != 0 + && s->output_section != bfd_abs_section_ptr + && !bfd_set_section_contents (output_bfd, s->output_section, + s->contents, s->output_offset, + s->size)) + return FALSE; + s = ppc64_elf_tdata (dynobj)->relgot; + if (s != NULL + && s->size != 0 + && s->output_section != bfd_abs_section_ptr + && !bfd_set_section_contents (output_bfd, s->output_section, + s->contents, s->output_offset, + s->size)) + return FALSE; + } + + return TRUE; +} + +#include "elf64-target.h" + +/* FreeBSD support */ + +#undef TARGET_LITTLE_SYM +#undef TARGET_LITTLE_NAME + +#undef TARGET_BIG_SYM +#define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec +#undef TARGET_BIG_NAME +#define TARGET_BIG_NAME "elf64-powerpc-freebsd" + +#undef ELF_OSABI +#define ELF_OSABI ELFOSABI_FREEBSD + +#undef elf64_bed +#define elf64_bed elf64_powerpc_fbsd_bed + +#include "elf64-target.h" + |