diff options
Diffstat (limited to 'binutils-2.24/bfd/elf32-nios2.c')
| -rw-r--r-- | binutils-2.24/bfd/elf32-nios2.c | 4136 |
1 files changed, 0 insertions, 4136 deletions
diff --git a/binutils-2.24/bfd/elf32-nios2.c b/binutils-2.24/bfd/elf32-nios2.c deleted file mode 100644 index a6c67201..00000000 --- a/binutils-2.24/bfd/elf32-nios2.c +++ /dev/null @@ -1,4136 +0,0 @@ -/* 32-bit ELF support for Nios II. - Copyright (C) 2012, 2013 Free Software Foundation, Inc. - Contributed by Nigel Gray (ngray@altera.com). - Contributed by Mentor Graphics, Inc. - - 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. */ - -/* This file handles Altera Nios II ELF targets. */ - -#include "sysdep.h" -#include "bfd.h" -#include "libbfd.h" -#include "bfdlink.h" -#include "genlink.h" -#include "elf-bfd.h" -#include "elf/nios2.h" -#include "opcode/nios2.h" - -/* Use RELA relocations. */ -#ifndef USE_RELA -#define USE_RELA -#endif - -#ifdef USE_REL -#undef USE_REL -#endif - -/* Forward declarations. */ -static bfd_reloc_status_type nios2_elf32_ignore_reloc - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_hi16_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_lo16_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_hiadj16_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_pcrel16_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_call26_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_gprel_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_ujmp_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_cjmp_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); -static bfd_reloc_status_type nios2_elf32_callr_relocate - (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); - -/* Target vector. */ -extern const bfd_target bfd_elf32_littlenios2_vec; -extern const bfd_target bfd_elf32_bignios2_vec; - -/* Offset of tp and dtp pointers from start of TLS block. */ -#define TP_OFFSET 0x7000 -#define DTP_OFFSET 0x8000 - -/* The relocation table used for SHT_REL sections. */ -static reloc_howto_type elf_nios2_howto_table_rel[] = { - /* No relocation. */ - HOWTO (R_NIOS2_NONE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_NIOS2_NONE", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* 16-bit signed immediate relocation. */ - HOWTO (R_NIOS2_S16, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 6, /* bitpos */ - complain_overflow_signed, /* complain on overflow */ - bfd_elf_generic_reloc, /* special function */ - "R_NIOS2_S16", /* name */ - FALSE, /* partial_inplace */ - 0x003fffc0, /* src_mask */ - 0x003fffc0, /* dest_mask */ - FALSE), /* pcrel_offset */ - - /* 16-bit unsigned immediate relocation. */ - HOWTO (R_NIOS2_U16, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 6, /* bitpos */ - complain_overflow_unsigned, /* complain on overflow */ - bfd_elf_generic_reloc, /* special function */ - "R_NIOS2_U16", /* name */ - FALSE, /* partial_inplace */ - 0x003fffc0, /* src_mask */ - 0x003fffc0, /* dest_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_NIOS2_PCREL16, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 6, /* bitpos */ - complain_overflow_signed, /* complain on overflow */ - nios2_elf32_pcrel16_relocate, /* special function */ - "R_NIOS2_PCREL16", /* name */ - FALSE, /* partial_inplace */ - 0x003fffc0, /* src_mask */ - 0x003fffc0, /* dest_mask */ - TRUE), /* pcrel_offset */ - - HOWTO (R_NIOS2_CALL26, /* type */ - 2, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 26, /* bitsize */ - FALSE, /* pc_relative */ - 6, /* bitpos */ - complain_overflow_dont, /* complain on overflow */ - nios2_elf32_call26_relocate, /* special function */ - "R_NIOS2_CALL26", /* name */ - FALSE, /* partial_inplace */ - 0xffffffc0, /* src_mask */ - 0xffffffc0, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_NIOS2_IMM5, - 0, - 2, - 5, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_IMM5", - FALSE, - 0x000007c0, - 0x000007c0, - FALSE), - - HOWTO (R_NIOS2_CACHE_OPX, - 0, - 2, - 5, - FALSE, - 22, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_CACHE_OPX", - FALSE, - 0x07c00000, - 0x07c00000, - FALSE), - - HOWTO (R_NIOS2_IMM6, - 0, - 2, - 6, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_IMM6", - FALSE, - 0x00000fc0, - 0x00000fc0, - FALSE), - - HOWTO (R_NIOS2_IMM8, - 0, - 2, - 8, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_IMM8", - FALSE, - 0x00003fc0, - 0x00003fc0, - FALSE), - - HOWTO (R_NIOS2_HI16, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_hi16_relocate, - "R_NIOS2_HI16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_LO16, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_lo16_relocate, - "R_NIOS2_LO16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_HIADJ16, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_hiadj16_relocate, - "R_NIOS2_HIADJ16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_BFD_RELOC_32, - 0, - 2, /* long */ - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_BFD_RELOC32", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_BFD_RELOC_16, - 0, - 1, /* short */ - 16, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_BFD_RELOC16", - FALSE, - 0x0000ffff, - 0x0000ffff, - FALSE), - - HOWTO (R_NIOS2_BFD_RELOC_8, - 0, - 0, /* byte */ - 8, - FALSE, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_BFD_RELOC8", - FALSE, - 0x000000ff, - 0x000000ff, - FALSE), - - HOWTO (R_NIOS2_GPREL, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_gprel_relocate, - "R_NIOS2_GPREL", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_GNU_VTINHERIT, - 0, - 2, /* short */ - 0, - FALSE, - 0, - complain_overflow_dont, - NULL, - "R_NIOS2_GNU_VTINHERIT", - FALSE, - 0, - 0, - FALSE), - - HOWTO (R_NIOS2_GNU_VTENTRY, - 0, - 2, /* byte */ - 0, - FALSE, - 0, - complain_overflow_dont, - _bfd_elf_rel_vtable_reloc_fn, - "R_NIOS2_GNU_VTENTRY", - FALSE, - 0, - 0, - FALSE), - - HOWTO (R_NIOS2_UJMP, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_ujmp_relocate, - "R_NIOS2_UJMP", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_CJMP, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_cjmp_relocate, - "R_NIOS2_CJMP", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_CALLR, - 0, - 2, - 32, - FALSE, - 6, - complain_overflow_dont, - nios2_elf32_callr_relocate, - "R_NIOS2_CALLR", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_ALIGN, - 0, - 2, - 0, - FALSE, - 0, - complain_overflow_dont, - nios2_elf32_ignore_reloc, - "R_NIOS2_ALIGN", - FALSE, - 0, - 0, - TRUE), - - - HOWTO (R_NIOS2_GOT16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_GOT16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_CALL16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_CALL16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_GOTOFF_LO, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_GOTOFF_LO", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_GOTOFF_HA, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_GOTOFF_HA", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_PCREL_LO, - 0, - 2, - 16, - TRUE, - 6, - complain_overflow_dont, - nios2_elf32_pcrel_lo16_relocate, - "R_NIOS2_PCREL_LO", - FALSE, - 0x003fffc0, - 0x003fffc0, - TRUE), - - HOWTO (R_NIOS2_PCREL_HA, - 0, - 2, - 16, - FALSE, /* This is a PC-relative relocation, but we need to subtract - PC ourselves before the HIADJ. */ - 6, - complain_overflow_dont, - nios2_elf32_pcrel_hiadj16_relocate, - "R_NIOS2_PCREL_HA", - FALSE, - 0x003fffc0, - 0x003fffc0, - TRUE), - - HOWTO (R_NIOS2_TLS_GD16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_GD16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_TLS_LDM16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_LDM16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_TLS_LDO16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_LDO16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_TLS_IE16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_IE16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_TLS_LE16, - 0, - 2, - 16, - FALSE, - 6, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_LE16", - FALSE, - 0x003fffc0, - 0x003fffc0, - FALSE), - - HOWTO (R_NIOS2_TLS_DTPMOD, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_DTPMOD", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_TLS_DTPREL, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_DTPREL", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_TLS_TPREL, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_TLS_TPREL", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_COPY, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_COPY", - FALSE, - 0, - 0, - FALSE), - - HOWTO (R_NIOS2_GLOB_DAT, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_GLOB_DAT", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_JUMP_SLOT, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_JUMP_SLOT", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_RELATIVE, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_RELATIVE", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - - HOWTO (R_NIOS2_GOTOFF, - 0, - 2, - 32, - FALSE, - 0, - complain_overflow_dont, - bfd_elf_generic_reloc, - "R_NIOS2_GOTOFF", - FALSE, - 0xffffffff, - 0xffffffff, - FALSE), - -/* Add other relocations here. */ -}; - -static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1]; - -/* Return the howto for relocation RTYPE. */ -static reloc_howto_type * -lookup_howto (unsigned int rtype) -{ - static int initialized = 0; - int i; - int howto_tbl_size = (int) (sizeof (elf_nios2_howto_table_rel) - / sizeof (elf_nios2_howto_table_rel[0])); - - if (!initialized) - { - initialized = 1; - memset (elf_code_to_howto_index, 0xff, - sizeof (elf_code_to_howto_index)); - for (i = 0; i < howto_tbl_size; i++) - elf_code_to_howto_index[elf_nios2_howto_table_rel[i].type] = i; - } - - BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL); - i = elf_code_to_howto_index[rtype]; - if (i >= howto_tbl_size) - return 0; - return elf_nios2_howto_table_rel + i; -} - -/* Map for converting BFD reloc types to Nios II reloc types. */ -struct elf_reloc_map -{ - bfd_reloc_code_real_type bfd_val; - enum elf_nios2_reloc_type elf_val; -}; - -static const struct elf_reloc_map nios2_reloc_map[] = { - {BFD_RELOC_NIOS2_S16, R_NIOS2_S16}, - {BFD_RELOC_NIOS2_U16, R_NIOS2_U16}, - {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16}, - {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26}, - {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5}, - {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX}, - {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6}, - {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8}, - {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16}, - {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16}, - {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16}, - {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32}, - {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16}, - {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8}, - {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL}, - {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT}, - {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY}, - {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP}, - {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP}, - {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR}, - {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN}, - {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16}, - {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16}, - {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO}, - {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA}, - {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO}, - {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA}, - {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16}, - {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16}, - {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16}, - {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16}, - {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16}, - {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD}, - {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL}, - {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL}, - {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY}, - {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT}, - {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT}, - {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE}, - {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF} -}; - -/* The Nios II linker needs to keep track of the number of relocs that it - decides to copy as dynamic relocs in check_relocs for each symbol. - This is so that it can later discard them if they are found to be - unnecessary. We store the information in a field extending the - regular ELF linker hash table. */ - -struct elf32_nios2_dyn_relocs -{ - struct elf32_nios2_dyn_relocs *next; - - /* The input section of the reloc. */ - asection *sec; - - /* Total number of relocs copied for the input section. */ - bfd_size_type count; - - /* Number of pc-relative relocs copied for the input section. */ - bfd_size_type pc_count; -}; - -/* Nios II ELF linker hash entry. */ - -struct elf32_nios2_link_hash_entry -{ - struct elf_link_hash_entry root; - - /* Track dynamic relocs copied for this symbol. */ - struct elf32_nios2_dyn_relocs *dyn_relocs; - -#define GOT_UNKNOWN 0 -#define GOT_NORMAL 1 -#define GOT_TLS_GD 2 -#define GOT_TLS_IE 4 - unsigned char tls_type; - - /* We need to detect and take special action for symbols which are only - referenced with %call() and not with %got(). Such symbols do not need - a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy - linking will not work if the dynamic GOT reloc exists. - To check for this condition efficiently, we compare got_types_used against - CALL16_USED, meaning - (got_types_used & (GOT16_USED | CALL16_USED)) == CALL16_USED. */ -#define GOT16_USED 1 -#define CALL16_USED 2 - unsigned char got_types_used; -}; - -#define elf32_nios2_hash_entry(ent) \ - ((struct elf32_nios2_link_hash_entry *) (ent)) - -/* Get the Nios II elf linker hash table from a link_info structure. */ -#define elf32_nios2_hash_table(info) \ - ((struct elf32_nios2_link_hash_table *) ((info)->hash)) - -/* Nios II ELF linker hash table. */ -struct elf32_nios2_link_hash_table - { - /* The main hash table. */ - struct elf_link_hash_table root; - - /* Short-cuts to get to dynamic linker sections. */ - asection *sdynbss; - asection *srelbss; - asection *sbss; - - union { - bfd_signed_vma refcount; - bfd_vma offset; - } tls_ldm_got; - - /* Small local sym cache. */ - struct sym_cache sym_cache; - - bfd_vma res_n_size; - }; - -struct nios2_elf32_obj_tdata -{ - struct elf_obj_tdata root; - - /* tls_type for each local got entry. */ - char *local_got_tls_type; - - /* TRUE if TLS GD relocs have been seen for this object. */ - bfd_boolean has_tlsgd; -}; - -#define elf32_nios2_tdata(abfd) \ - ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any) - -#define elf32_nios2_local_got_tls_type(abfd) \ - (elf32_nios2_tdata (abfd)->local_got_tls_type) - -/* The name of the dynamic interpreter. This is put in the .interp - section. */ -#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" - -/* PLT implementation for position-dependent code. */ -static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */ - 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */ - 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */ - 0x7800683a /* jmp r15 */ -}; - -static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */ - 0x03800034, /* movhi r14, %hiadj(res_0) */ - 0x73800004, /* addi r14, r14, %lo(res_0) */ - 0x7b9fc83a, /* sub r15, r15, r14 */ - 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ - 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ - 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ - 0x6800683a /* jmp r13 */ -}; - -/* PLT implementation for position-independent code. */ -static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */ - 0x03c00034, /* movhi r15, %hiadj(index * 4) */ - 0x7bc00004, /* addi r15, r15, %lo(index * 4) */ - 0x00000006 /* br .PLTresolve */ -}; - -static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */ - 0x001ce03a, /* nextpc r14 */ - 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ - 0x6b9b883a, /* add r13, r13, r14 */ - 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ - 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ - 0x6800683a /* jmp r13 */ -}; - -/* Implement elf_backend_grok_prstatus: - Support for core dump NOTE sections. */ -static bfd_boolean -nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) -{ - int offset; - size_t size; - - switch (note->descsz) - { - default: - return FALSE; - - case 212: /* Linux/Nios II */ - /* pr_cursig */ - elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); - - /* pr_pid */ - elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); - - /* pr_reg */ - offset = 72; - size = 136; - - break; - } - - /* Make a ".reg/999" section. */ - return _bfd_elfcore_make_pseudosection (abfd, ".reg", - size, note->descpos + offset); -} - -/* Implement elf_backend_grok_psinfo. */ -static bfd_boolean -nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) -{ - switch (note->descsz) - { - default: - return FALSE; - - case 124: /* Linux/Nios II elf_prpsinfo */ - elf_tdata (abfd)->core->program - = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); - elf_tdata (abfd)->core->command - = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); - } - - /* Note that for some reason, a spurious space is tacked - onto the end of the args in some (at least one anyway) - implementations, so strip it off if it exists. */ - - { - char *command = elf_tdata (abfd)->core->command; - int n = strlen (command); - - if (0 < n && command[n - 1] == ' ') - command[n - 1] = '\0'; - } - - return TRUE; -} - -/* Create an entry in a Nios II 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 elf32_nios2_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) - { - struct elf32_nios2_link_hash_entry *eh; - - eh = (struct elf32_nios2_link_hash_entry *) entry; - eh->dyn_relocs = NULL; - eh->tls_type = GOT_UNKNOWN; - eh->got_types_used = 0; - } - - return entry; -} - -/* Implement bfd_elf32_bfd_reloc_type_lookup: - Given a BFD reloc type, return a howto structure. */ -static reloc_howto_type * -nios2_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, - bfd_reloc_code_real_type code) -{ - int i; - for (i = 0; - i < (int) (sizeof (nios2_reloc_map) / sizeof (struct elf_reloc_map)); - ++i) - if (nios2_reloc_map[i].bfd_val == code) - return &elf_nios2_howto_table_rel[(int) nios2_reloc_map[i].elf_val]; - return NULL; -} - -/* Implement bfd_elf32_bfd_reloc_name_lookup: - Given a reloc name, return a howto structure. */ -static reloc_howto_type * -nios2_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, - const char *r_name) -{ - unsigned int i; - for (i = 0; - i < (sizeof (elf_nios2_howto_table_rel) - / sizeof (elf_nios2_howto_table_rel[0])); - i++) - if (elf_nios2_howto_table_rel[i].name - && strcasecmp (elf_nios2_howto_table_rel[i].name, r_name) == 0) - return &elf_nios2_howto_table_rel[i]; - - return NULL; -} - -/* Implement elf_info_to_howto: - Given a ELF32 relocation, fill in a arelent structure. */ -static void -nios2_elf32_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, - Elf_Internal_Rela *dst) -{ - unsigned int r_type; - - r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < R_NIOS2_ILLEGAL); - cache_ptr->howto = &elf_nios2_howto_table_rel[r_type]; -} - -/* Return the base VMA address which should be subtracted from real addresses - when resolving @dtpoff relocation. - This is PT_TLS segment p_vaddr. */ -static bfd_vma -dtpoff_base (struct bfd_link_info *info) -{ - /* If tls_sec is NULL, we should have signalled an error already. */ - if (elf_hash_table (info)->tls_sec == NULL) - return 0; - return elf_hash_table (info)->tls_sec->vma; -} - -/* Return the relocation value for @tpoff relocation - if STT_TLS virtual address is ADDRESS. */ -static bfd_vma -tpoff (struct bfd_link_info *info, bfd_vma address) -{ - struct elf_link_hash_table *htab = elf_hash_table (info); - - /* If tls_sec is NULL, we should have signalled an error already. */ - if (htab->tls_sec == NULL) - return 0; - return address - htab->tls_sec->vma; -} - -/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a - dangerous relocation. */ -static bfd_boolean -nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info) -{ - - bfd_boolean gp_found; - struct bfd_hash_entry *h; - struct bfd_link_hash_entry *lh; - - /* If we've already figured out what GP will be, just return it. */ - *pgp = _bfd_get_gp_value (output_bfd); - if (*pgp) - return TRUE; - - h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE); - lh = (struct bfd_link_hash_entry *) h; -lookup: - if (lh) - { - switch (lh->type) - { - case bfd_link_hash_undefined: - case bfd_link_hash_undefweak: - case bfd_link_hash_common: - gp_found = FALSE; - break; - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - gp_found = TRUE; - *pgp = lh->u.def.value; - break; - case bfd_link_hash_indirect: - case bfd_link_hash_warning: - lh = lh->u.i.link; - /* @@FIXME ignoring warning for now */ - goto lookup; - case bfd_link_hash_new: - default: - abort (); - } - } - else - gp_found = FALSE; - - if (!gp_found) - { - /* Only get the error once. */ - *pgp = 4; - _bfd_set_gp_value (output_bfd, *pgp); - return FALSE; - } - - _bfd_set_gp_value (output_bfd, *pgp); - - return TRUE; -} - -/* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous - if it's not available as we don't have a link_info pointer available here - to look it up in the output symbol table. We don't need to adjust the - symbol value for an external symbol if we are producing relocatable - output. */ -static bfd_reloc_status_type -nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, - char **error_message, bfd_vma *pgp) -{ - if (bfd_is_und_section (symbol->section) && !relocatable) - { - *pgp = 0; - return bfd_reloc_undefined; - } - - *pgp = _bfd_get_gp_value (output_bfd); - if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) - { - if (relocatable) - { - /* Make up a value. */ - *pgp = symbol->section->output_section->vma + 0x4000; - _bfd_set_gp_value (output_bfd, *pgp); - } - else - { - *error_message - = (char *) _("global pointer relative relocation when _gp not defined"); - return bfd_reloc_dangerous; - } - } - - return bfd_reloc_ok; -} - -/* The usual way of loading a 32-bit constant into a Nios II register is to - load the high 16 bits in one instruction and then add the low 16 bits with - a signed add. This means that the high halfword needs to be adjusted to - compensate for the sign bit of the low halfword. This function returns the - adjusted high halfword for a given 32-bit constant. */ -static -bfd_vma hiadj (bfd_vma symbol_value) -{ - return ((symbol_value + 0x8000) >> 16) & 0xffff; -} - -/* Do the relocations that require special handling. */ -static bfd_reloc_status_type -nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - symbol_value = symbol_value + addend; - addend = 0; - symbol_value = (symbol_value >> 16) & 0xffff; - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - symbol_value = symbol_value + addend; - addend = 0; - symbol_value = symbol_value & 0xffff; - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - symbol_value = symbol_value + addend; - addend = 0; - symbol_value = hiadj(symbol_value); - return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, - symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - symbol_value = symbol_value + addend; - addend = 0; - symbol_value = symbol_value & 0xffff; - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section - ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - symbol_value = symbol_value + addend; - symbol_value -= (input_section->output_section->vma - + input_section->output_offset); - symbol_value -= offset; - addend = 0; - symbol_value = hiadj(symbol_value); - return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, - symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - /* NIOS2 pc relative relocations are relative to the next 32-bit instruction - so we need to subtract 4 before doing a final_link_relocate. */ - symbol_value = symbol_value + addend - 4; - addend = 0; - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - /* Check that the relocation is in the same page as the current address. */ - if (((symbol_value + addend) & 0xf0000000) - != ((input_section->output_section->vma + offset) & 0xf0000000)) - return bfd_reloc_overflow; - - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - /* Because we need the output_bfd, the special handling is done - in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */ - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_value, addend); -} - -static bfd_reloc_status_type -nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - bfd_vma symbol_lo16, symbol_hi16; - bfd_reloc_status_type r; - symbol_value = symbol_value + addend; - addend = 0; - symbol_hi16 = (symbol_value >> 16) & 0xffff; - symbol_lo16 = symbol_value & 0xffff; - - r = _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_hi16, addend); - - if (r == bfd_reloc_ok) - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset + 4, symbol_lo16, addend); - - return r; -} - -static bfd_reloc_status_type -nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - bfd_vma symbol_lo16, symbol_hi16; - bfd_reloc_status_type r; - symbol_value = symbol_value + addend; - addend = 0; - symbol_hi16 = (symbol_value >> 16) & 0xffff; - symbol_lo16 = symbol_value & 0xffff; - - r = _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_hi16, addend); - - if (r == bfd_reloc_ok) - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset + 4, symbol_lo16, addend); - - return r; -} - -static bfd_reloc_status_type -nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto, - asection *input_section ATTRIBUTE_UNUSED, - bfd_byte *data, bfd_vma offset, - bfd_vma symbol_value, bfd_vma addend) -{ - bfd_vma symbol_lo16, symbol_hi16; - bfd_reloc_status_type r; - symbol_value = symbol_value + addend; - addend = 0; - symbol_hi16 = (symbol_value >> 16) & 0xffff; - symbol_lo16 = symbol_value & 0xffff; - - r = _bfd_final_link_relocate (howto, abfd, input_section, - data, offset, symbol_hi16, addend); - - if (r == bfd_reloc_ok) - return _bfd_final_link_relocate (howto, abfd, input_section, - data, offset + 4, symbol_lo16, addend); - - return r; -} - -/* HOWTO handlers for relocations that require special handling. */ - -/* This is for relocations used only when relaxing to ensure - changes in size of section don't screw up .align. */ -static bfd_reloc_status_type -nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, - asymbol *symbol ATTRIBUTE_UNUSED, - void *data ATTRIBUTE_UNUSED, asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - if (output_bfd != NULL) - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; -} - -static bfd_reloc_status_type -nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry, - asymbol *symbol, void *data, - asection *input_section, bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_pcrel_lo16_relocate ( - abfd, reloc_entry->howto, input_section, data, reloc_entry->address, - (symbol->value + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, - asymbol *symbol, void *data, - asection *input_section, bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_pcrel_hiadj16_relocate ( - abfd, reloc_entry->howto, input_section, data, reloc_entry->address, - (symbol->value + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, char **msg) -{ - bfd_vma relocation; - bfd_vma gp; - bfd_reloc_status_type r; - - - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - relocation = (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset); - - /* This assumes we've already cached the _gp symbol. */ - r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp); - if (r == bfd_reloc_ok) - { - relocation = relocation + reloc_entry->addend - gp; - reloc_entry->addend = 0; - if ((signed) relocation < -32768 || (signed) relocation > 32767) - { - *msg = _("global pointer relative address out of range"); - r = bfd_reloc_outofrange; - } - else - r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - relocation, reloc_entry->addend); - } - - return r; -} - -static bfd_reloc_status_type -nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - -static bfd_reloc_status_type -nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, - void *data, asection *input_section, - bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) -{ - /* This part is from bfd_elf_generic_reloc. */ - if (output_bfd != NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - if (output_bfd != NULL) - /* FIXME: See bfd_perform_relocation. Is this right? */ - return bfd_reloc_continue; - - return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto, - input_section, - data, reloc_entry->address, - (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset), - reloc_entry->addend); -} - - -/* Implement elf_backend_relocate_section. */ -static bfd_boolean -nios2_elf32_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) -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - Elf_Internal_Rela *rel; - Elf_Internal_Rela *relend; - struct elf32_nios2_link_hash_table *htab; - asection *sgot; - asection *splt; - asection *sreloc = NULL; - bfd_vma *local_got_offsets; - - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (input_bfd); - relend = relocs + input_section->reloc_count; - - htab = elf32_nios2_hash_table (info); - sgot = htab->root.sgot; - splt = htab->root.splt; - local_got_offsets = elf_local_got_offsets (input_bfd); - - for (rel = relocs; rel < relend; rel++) - { - reloc_howto_type *howto; - unsigned long r_symndx; - Elf_Internal_Sym *sym; - asection *sec; - struct elf_link_hash_entry *h; - struct elf32_nios2_link_hash_entry *eh; - bfd_vma relocation; - bfd_vma gp; - bfd_vma reloc_address; - bfd_reloc_status_type r = bfd_reloc_ok; - const char *name = NULL; - int r_type; - const char *format; - char msgbuf[256]; - const char* msg = (const char*) NULL; - bfd_boolean unresolved_reloc; - bfd_vma off; - int use_plt; - - r_type = ELF32_R_TYPE (rel->r_info); - r_symndx = ELF32_R_SYM (rel->r_info); - - howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info)); - h = NULL; - sym = NULL; - sec = NULL; - - if (r_symndx < symtab_hdr->sh_info) - { - sym = local_syms + r_symndx; - sec = local_sections[r_symndx]; - relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); - } - else - { - bfd_boolean warned; - - RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, - r_symndx, symtab_hdr, sym_hashes, - h, sec, relocation, - unresolved_reloc, warned); - } - - if (sec && discarded_section (sec)) - RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, - rel, 1, relend, howto, 0, contents); - - /* Nothing more to do unless this is a final link. */ - if (info->relocatable) - continue; - - if (sec && sec->output_section) - reloc_address = (sec->output_section->vma + sec->output_offset - + rel->r_offset); - else - reloc_address = 0; - - if (howto) - { - switch (howto->type) - { - case R_NIOS2_HI16: - r = nios2_elf32_do_hi16_relocate (input_bfd, howto, - input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - case R_NIOS2_LO16: - r = nios2_elf32_do_lo16_relocate (input_bfd, howto, - input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - case R_NIOS2_PCREL_LO: - r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto, - input_section, - contents, - rel->r_offset, - relocation, - rel->r_addend); - break; - case R_NIOS2_HIADJ16: - r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - case R_NIOS2_PCREL_HA: - r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto, - input_section, - contents, - rel->r_offset, - relocation, - rel->r_addend); - break; - case R_NIOS2_PCREL16: - r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - case R_NIOS2_GPREL: - /* Turns an absolute address into a gp-relative address. */ - if (!nios2_elf_assign_gp (output_bfd, &gp, info)) - { - format = _("global pointer relative relocation at address " - "0x%08x when _gp not defined\n"); - sprintf (msgbuf, format, reloc_address); - msg = msgbuf; - r = bfd_reloc_dangerous; - } - else - { - bfd_vma symbol_address = rel->r_addend + relocation; - relocation = relocation + rel->r_addend - gp; - rel->r_addend = 0; - if (((signed) relocation < -32768 - || (signed) relocation > 32767) - && (!h - || h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)) - { - format = _("Unable to reach %s (at 0x%08x) from the " - "global pointer (at 0x%08x) because the " - "offset (%d) is out of the allowed range, " - "-32678 to 32767.\n" ); - sprintf (msgbuf, format, name, symbol_address, gp, - (signed)relocation); - msg = msgbuf; - r = bfd_reloc_outofrange; - } - else - r = _bfd_final_link_relocate (howto, input_bfd, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - } - - break; - case R_NIOS2_UJMP: - r = nios2_elf32_do_ujmp_relocate (input_bfd, howto, - input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - case R_NIOS2_CJMP: - r = nios2_elf32_do_cjmp_relocate (input_bfd, howto, - input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - case R_NIOS2_CALLR: - r = nios2_elf32_do_callr_relocate (input_bfd, howto, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - case R_NIOS2_CALL26: - /* If we have a call to an undefined weak symbol, we just want - to stuff a zero in the bits of the call instruction and - bypass the normal call26 relocation handling, because it'll - diagnose an overflow error if address 0 isn't in the same - 256MB segment as the call site. Presumably the call - should be guarded by a null check anyway. */ - if (h != NULL && h->root.type == bfd_link_hash_undefweak) - { - BFD_ASSERT (relocation == 0 && rel->r_addend == 0); - r = _bfd_final_link_relocate (howto, input_bfd, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - } - /* Handle relocations which should use the PLT entry. - NIOS2_BFD_RELOC_32 relocations will use the symbol's value, - which may point to a PLT entry, but we don't need to handle - that here. If we created a PLT entry, all branches in this - object should go to it. */ - if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) - { - /* If we've created a .plt section, and assigned a PLT entry - to this function, it should not be known to bind locally. - If it were, we would have cleared the PLT entry. */ - BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); - - relocation = (splt->output_section->vma - + splt->output_offset - + h->plt.offset); - - unresolved_reloc = FALSE; - } - r = nios2_elf32_do_call26_relocate (input_bfd, howto, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - case R_NIOS2_ALIGN: - r = bfd_reloc_ok; - /* For symmetry this would be - r = nios2_elf32_do_ignore_reloc (input_bfd, howto, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - but do_ignore_reloc would do no more than return - bfd_reloc_ok. */ - break; - - case R_NIOS2_GOT16: - case R_NIOS2_CALL16: - /* Relocation is to the entry for this symbol in the - global offset table. */ - if (sgot == NULL) - { - r = bfd_reloc_notsupported; - break; - } - - use_plt = 0; - - if (h != NULL) - { - bfd_boolean dyn; - - eh = (struct elf32_nios2_link_hash_entry *)h; - use_plt = (eh->got_types_used == CALL16_USED - && h->plt.offset != (bfd_vma) -1); - - off = h->got.offset; - BFD_ASSERT (off != (bfd_vma) -1); - dyn = elf_hash_table (info)->dynamic_sections_created; - if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) - || (info->shared - && SYMBOL_REFERENCES_LOCAL (info, h)) - || (ELF_ST_VISIBILITY (h->other) - && h->root.type == bfd_link_hash_undefweak)) - { - /* This is actually a static link, or it is a -Bsymbolic - link and the symbol is defined locally. We must - initialize this entry in the global offset table. - Since the offset must always be a multiple of 4, we - use the least significant bit to record whether we - have initialized it already. - - When doing a dynamic link, we create a .rela.got - relocation entry to initialize the value. This is - done in the finish_dynamic_symbol routine. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, relocation, - sgot->contents + off); - h->got.offset |= 1; - } - } - else - unresolved_reloc = FALSE; - } - else - { - BFD_ASSERT (local_got_offsets != NULL - && local_got_offsets[r_symndx] != (bfd_vma) -1); - - off = local_got_offsets[r_symndx]; - - /* The offset must always be a multiple of 4. We use the - least significant bit to record whether we have already - generated the necessary reloc. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, relocation, - sgot->contents + off); - - if (info->shared) - { - asection *srelgot; - Elf_Internal_Rela outrel; - bfd_byte *loc; - - srelgot = htab->root.srelgot; - BFD_ASSERT (srelgot != NULL); - - outrel.r_addend = relocation; - outrel.r_offset = (sgot->output_section->vma - + sgot->output_offset - + off); - outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); - loc = srelgot->contents; - loc += (srelgot->reloc_count++ * - sizeof (Elf32_External_Rela)); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - } - - local_got_offsets[r_symndx] |= 1; - } - } - - if (use_plt && info->shared) - { - off = ((h->plt.offset - 24) / 12 + 3) * 4; - relocation = htab->root.sgotplt->output_offset + off; - } - else - relocation = sgot->output_offset + off; - - /* This relocation does not use the addend. */ - rel->r_addend = 0; - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - - case R_NIOS2_GOTOFF_LO: - case R_NIOS2_GOTOFF_HA: - case R_NIOS2_GOTOFF: - /* Relocation is relative to the start of the - global offset table. */ - - BFD_ASSERT (sgot != NULL); - if (sgot == NULL) - { - r = bfd_reloc_notsupported; - break; - } - - /* Note that sgot->output_offset is not involved in this - calculation. We always want the start of .got. If we - define _GLOBAL_OFFSET_TABLE in a different way, as is - permitted by the ABI, we might have to change this - calculation. */ - relocation -= sgot->output_section->vma; - switch (howto->type) - { - case R_NIOS2_GOTOFF_LO: - r = nios2_elf32_do_lo16_relocate (input_bfd, howto, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - case R_NIOS2_GOTOFF_HA: - r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, - input_section, contents, - rel->r_offset, - relocation, - rel->r_addend); - break; - default: - r = _bfd_final_link_relocate (howto, input_bfd, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - } - break; - - case R_NIOS2_TLS_LDO16: - relocation -= dtpoff_base (info) + DTP_OFFSET; - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - case R_NIOS2_TLS_LDM16: - if (htab->root.sgot == NULL) - abort (); - - off = htab->tls_ldm_got.offset; - - if ((off & 1) != 0) - off &= ~1; - else - { - /* If we don't know the module number, create a relocation - for it. */ - if (info->shared) - { - Elf_Internal_Rela outrel; - bfd_byte *loc; - - if (htab->root.srelgot == NULL) - abort (); - - outrel.r_addend = 0; - outrel.r_offset = (htab->root.sgot->output_section->vma - + htab->root.sgot->output_offset - + off); - outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD); - - loc = htab->root.srelgot->contents; - loc += (htab->root.srelgot->reloc_count++ - * sizeof (Elf32_External_Rela)); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - } - else - bfd_put_32 (output_bfd, 1, - htab->root.sgot->contents + off); - - htab->tls_ldm_got.offset |= 1; - } - - relocation = (htab->root.sgot->output_offset + off); - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - - break; - case R_NIOS2_TLS_GD16: - case R_NIOS2_TLS_IE16: - { - int indx; - char tls_type; - - if (htab->root.sgot == NULL) - abort (); - - indx = 0; - if (h != NULL) - { - bfd_boolean dyn; - dyn = htab->root.dynamic_sections_created; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) - && (!info->shared - || !SYMBOL_REFERENCES_LOCAL (info, h))) - { - unresolved_reloc = FALSE; - indx = h->dynindx; - } - off = h->got.offset; - tls_type = (((struct elf32_nios2_link_hash_entry *) h) - ->tls_type); - } - else - { - if (local_got_offsets == NULL) - abort (); - off = local_got_offsets[r_symndx]; - tls_type = (elf32_nios2_local_got_tls_type (input_bfd) - [r_symndx]); - } - - if (tls_type == GOT_UNKNOWN) - abort (); - - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_boolean need_relocs = FALSE; - Elf_Internal_Rela outrel; - bfd_byte *loc = NULL; - int cur_off = off; - - /* The GOT entries have not been initialized yet. Do it - now, and emit any relocations. If both an IE GOT and a - GD GOT are necessary, we emit the GD first. */ - - if ((info->shared || indx != 0) - && (h == NULL - || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak)) - { - need_relocs = TRUE; - if (htab->root.srelgot == NULL) - abort (); - loc = htab->root.srelgot->contents; - loc += (htab->root.srelgot->reloc_count * - sizeof (Elf32_External_Rela)); - } - - if (tls_type & GOT_TLS_GD) - { - if (need_relocs) - { - outrel.r_addend = 0; - outrel.r_offset = (htab->root.sgot->output_section->vma - + htab->root.sgot->output_offset - + cur_off); - outrel.r_info = ELF32_R_INFO (indx, - R_NIOS2_TLS_DTPMOD); - - bfd_elf32_swap_reloca_out (output_bfd, &outrel, - loc); - htab->root.srelgot->reloc_count++; - loc += sizeof (Elf32_External_Rela); - - if (indx == 0) - bfd_put_32 (output_bfd, - (relocation - dtpoff_base (info) - - DTP_OFFSET), - htab->root.sgot->contents + cur_off + 4); - else - { - outrel.r_addend = 0; - outrel.r_info = ELF32_R_INFO (indx, - R_NIOS2_TLS_DTPREL); - outrel.r_offset += 4; - - bfd_elf32_swap_reloca_out (output_bfd, &outrel, - loc); - htab->root.srelgot->reloc_count++; - loc += sizeof (Elf32_External_Rela); - } - } - else - { - /* If we are not emitting relocations for a - general dynamic reference, then we must be in a - static link or an executable link with the - symbol binding locally. Mark it as belonging - to module 1, the executable. */ - bfd_put_32 (output_bfd, 1, - htab->root.sgot->contents + cur_off); - bfd_put_32 (output_bfd, (relocation - - dtpoff_base (info) - - DTP_OFFSET), - htab->root.sgot->contents + cur_off + 4); - } - - cur_off += 8; - } - - if (tls_type & GOT_TLS_IE) - { - if (need_relocs) - { - if (indx == 0) - outrel.r_addend = (relocation - - dtpoff_base (info)); - else - outrel.r_addend = 0; - outrel.r_offset = (htab->root.sgot->output_section->vma - + htab->root.sgot->output_offset - + cur_off); - outrel.r_info = ELF32_R_INFO (indx, - R_NIOS2_TLS_TPREL); - - bfd_elf32_swap_reloca_out (output_bfd, &outrel, - loc); - htab->root.srelgot->reloc_count++; - loc += sizeof (Elf32_External_Rela); - } - else - bfd_put_32 (output_bfd, (tpoff (info, relocation) - - TP_OFFSET), - htab->root.sgot->contents + cur_off); - cur_off += 4; - } - - if (h != NULL) - h->got.offset |= 1; - else - local_got_offsets[r_symndx] |= 1; - } - - if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16) - off += 8; - relocation = (htab->root.sgot->output_offset + off); - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - } - - break; - case R_NIOS2_TLS_LE16: - if (info->shared && !info->pie) - { - (*_bfd_error_handler) - (_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not " - "permitted in shared object"), - input_bfd, input_section, - (long) rel->r_offset, howto->name); - return FALSE; - } - else - relocation = tpoff (info, relocation) - TP_OFFSET; - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - break; - - case R_NIOS2_BFD_RELOC_32: - if (info->shared - && (input_section->flags & SEC_ALLOC) != 0 - && (h == NULL - || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak)) - { - Elf_Internal_Rela outrel; - bfd_byte *loc; - bfd_boolean skip, relocate; - - /* When generating a shared object, these relocations - are copied into the output file to be resolved at run - time. */ - - skip = FALSE; - relocate = FALSE; - - outrel.r_offset - = _bfd_elf_section_offset (output_bfd, info, - input_section, rel->r_offset); - if (outrel.r_offset == (bfd_vma) -1) - skip = TRUE; - else if (outrel.r_offset == (bfd_vma) -2) - skip = TRUE, relocate = TRUE; - outrel.r_offset += (input_section->output_section->vma - + input_section->output_offset); - - if (skip) - memset (&outrel, 0, sizeof outrel); - else if (h != NULL - && h->dynindx != -1 - && (!info->shared - || !info->symbolic - || !h->def_regular)) - { - outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); - outrel.r_addend = rel->r_addend; - } - else - { - /* This symbol is local, or marked to become local. */ - outrel.r_addend = relocation + rel->r_addend; - relocate = TRUE; - outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); - } - - sreloc = elf_section_data (input_section)->sreloc; - if (sreloc == NULL) - abort (); - - loc = sreloc->contents; - loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - - /* This reloc will be computed at runtime, so there's no - need to do anything now, except for R_NIOS2_BFD_RELOC_32 - relocations that have been turned into - R_NIOS2_RELATIVE. */ - if (!relocate) - break; - } - - r = _bfd_final_link_relocate (howto, input_bfd, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - - case R_NIOS2_TLS_DTPREL: - relocation -= dtpoff_base (info); - /* Fall through. */ - - default: - r = _bfd_final_link_relocate (howto, input_bfd, - input_section, contents, - rel->r_offset, relocation, - rel->r_addend); - break; - } - } - else - r = bfd_reloc_notsupported; - - if (r != bfd_reloc_ok) - { - if (h != NULL) - name = h->root.root.string; - else - { - name = bfd_elf_string_from_elf_section (input_bfd, - symtab_hdr->sh_link, - sym->st_name); - if (name == NULL || *name == '\0') - name = bfd_section_name (input_bfd, sec); - } - - switch (r) - { - case bfd_reloc_overflow: - r = info->callbacks->reloc_overflow (info, NULL, name, - howto->name, (bfd_vma) 0, - input_bfd, input_section, - rel->r_offset); - break; - - case bfd_reloc_undefined: - r = info->callbacks->undefined_symbol (info, name, input_bfd, - input_section, - rel->r_offset, TRUE); - break; - - case bfd_reloc_outofrange: - if (msg == NULL) - msg = _("relocation out of range"); - break; - - case bfd_reloc_notsupported: - if (msg == NULL) - msg = _("unsupported relocation"); - break; - - case bfd_reloc_dangerous: - if (msg == NULL) - msg = _("dangerous relocation"); - break; - - default: - if (msg == NULL) - msg = _("unknown error"); - break; - } - - if (msg) - { - r = info->callbacks->warning - (info, msg, name, input_bfd, input_section, rel->r_offset); - return FALSE; - } - } - } - return TRUE; -} - -/* Implement elf-backend_section_flags: - Convert NIOS2 specific section flags to bfd internal section flags. */ -static bfd_boolean -nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) -{ - if (hdr->sh_flags & SHF_NIOS2_GPREL) - *flags |= SEC_SMALL_DATA; - - return TRUE; -} - -/* Implement elf_backend_fake_sections: - Set the correct type for an NIOS2 ELF section. We do this by the - section name, which is a hack, but ought to work. */ -static bfd_boolean -nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, - Elf_Internal_Shdr *hdr, asection *sec) -{ - register const char *name = bfd_get_section_name (abfd, sec); - - if ((sec->flags & SEC_SMALL_DATA) - || strcmp (name, ".sdata") == 0 - || strcmp (name, ".sbss") == 0 - || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0) - hdr->sh_flags |= SHF_NIOS2_GPREL; - - return TRUE; -} - -/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up - shortcuts to them in our hash table. */ -static bfd_boolean -create_got_section (bfd *dynobj, struct bfd_link_info *info) -{ - struct elf32_nios2_link_hash_table *htab; - - htab = elf32_nios2_hash_table (info); - - if (! _bfd_elf_create_got_section (dynobj, info)) - return FALSE; - - /* In order for the two loads in .PLTresolve to share the same %hiadj, - _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */ - if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4)) - return FALSE; - - return TRUE; -} - -/* Implement elf_backend_create_dynamic_sections: - Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and - .rela.bss sections in DYNOBJ, and set up shortcuts to them in our - hash table. */ -static bfd_boolean -nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) -{ - struct elf32_nios2_link_hash_table *htab; - - htab = elf32_nios2_hash_table (info); - if (!htab->root.sgot && !create_got_section (dynobj, info)) - return FALSE; - - _bfd_elf_create_dynamic_sections (dynobj, info); - - /* In order for the two loads in a shared object .PLTresolve to share the - same %hiadj, the start of the PLT (as well as the GOT) must be aligned - to a 16-byte boundary. This is because the addresses for these loads - include the -(.plt+4) PIC correction. */ - if (!bfd_set_section_alignment (dynobj, htab->root.splt, 4)) - return FALSE; - - htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); - if (!htab->sdynbss) - return FALSE; - if (!info->shared) - { - htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); - if (!htab->srelbss) - return FALSE; - } - - return TRUE; -} - -/* Implement elf_backend_copy_indirect_symbol: - Copy the extra info we tack onto an elf_link_hash_entry. */ -static void -nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info, - struct elf_link_hash_entry *dir, - struct elf_link_hash_entry *ind) -{ - struct elf32_nios2_link_hash_entry *edir, *eind; - - edir = (struct elf32_nios2_link_hash_entry *) dir; - eind = (struct elf32_nios2_link_hash_entry *) ind; - - if (eind->dyn_relocs != NULL) - { - if (edir->dyn_relocs != NULL) - { - struct elf32_nios2_dyn_relocs **pp; - struct elf32_nios2_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 elf32_nios2_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 (ind->root.type == bfd_link_hash_indirect - && dir->got.refcount <= 0) - { - edir->tls_type = eind->tls_type; - eind->tls_type = GOT_UNKNOWN; - } - - edir->got_types_used |= eind->got_types_used; - - _bfd_elf_link_hash_copy_indirect (info, dir, ind); -} - -/* Implement elf_backend_check_relocs: - Look through the relocs for a section during the first phase. */ -static bfd_boolean -nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info, - asection *sec, const Elf_Internal_Rela *relocs) -{ - bfd *dynobj; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - struct elf32_nios2_link_hash_table *htab; - asection *sgot; - asection *srelgot; - asection *sreloc = NULL; - bfd_signed_vma *local_got_refcounts; - - if (info->relocatable) - return TRUE; - - dynobj = elf_hash_table (info)->dynobj; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - sym_hashes_end = (sym_hashes - + symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); - if (!elf_bad_symtab (abfd)) - sym_hashes_end -= symtab_hdr->sh_info; - local_got_refcounts = elf_local_got_refcounts (abfd); - - htab = elf32_nios2_hash_table (info); - sgot = htab->root.sgot; - srelgot = htab->root.srelgot; - - rel_end = relocs + sec->reloc_count; - for (rel = relocs; rel < rel_end; rel++) - { - unsigned int r_type; - struct elf_link_hash_entry *h; - unsigned long r_symndx; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - /* PR15323, ref flags aren't set for references in the same - object. */ - h->root.non_ir_ref = 1; - } - - r_type = ELF32_R_TYPE (rel->r_info); - - switch (r_type) - { - case R_NIOS2_GOT16: - case R_NIOS2_CALL16: - case R_NIOS2_TLS_GD16: - case R_NIOS2_TLS_IE16: - /* This symbol requires a global offset table entry. */ - { - int tls_type, old_tls_type; - - switch (r_type) - { - default: - case R_NIOS2_GOT16: - case R_NIOS2_CALL16: - tls_type = GOT_NORMAL; - break; - case R_NIOS2_TLS_GD16: - tls_type = GOT_TLS_GD; - break; - case R_NIOS2_TLS_IE16: - tls_type = GOT_TLS_IE; - break; - } - - if (dynobj == NULL) - { - /* Create the .got section. */ - elf_hash_table (info)->dynobj = dynobj = abfd; - nios2_elf32_create_dynamic_sections (dynobj, info); - } - - if (sgot == NULL) - { - sgot = htab->root.sgot; - BFD_ASSERT (sgot != NULL); - } - - if (srelgot == NULL - && (h != NULL || info->shared)) - { - srelgot = htab->root.srelgot; - BFD_ASSERT (srelgot != NULL); - } - - if (h != NULL) - { - struct elf32_nios2_link_hash_entry *eh - = (struct elf32_nios2_link_hash_entry *)h; - h->got.refcount++; - old_tls_type = elf32_nios2_hash_entry(h)->tls_type; - if (r_type == R_NIOS2_CALL16) - { - /* Make sure a plt entry is created for this symbol if - it turns out to be a function defined by a dynamic - object. */ - h->plt.refcount++; - h->needs_plt = 1; - h->type = STT_FUNC; - eh->got_types_used |= CALL16_USED; - } - else - eh->got_types_used |= GOT16_USED; - } - else - { - /* This is a global offset table entry for a local symbol. */ - if (local_got_refcounts == NULL) - { - bfd_size_type size; - - size = symtab_hdr->sh_info; - size *= (sizeof (bfd_signed_vma) + sizeof (char)); - local_got_refcounts - = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); - if (local_got_refcounts == NULL) - return FALSE; - elf_local_got_refcounts (abfd) = local_got_refcounts; - elf32_nios2_local_got_tls_type (abfd) - = (char *) (local_got_refcounts + symtab_hdr->sh_info); - } - local_got_refcounts[r_symndx]++; - old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx]; - } - - /* We will already have issued an error message if there is a - TLS / non-TLS mismatch, based on the symbol type. We don't - support any linker relaxations. So just combine any TLS - types needed. */ - if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL - && tls_type != GOT_NORMAL) - tls_type |= old_tls_type; - - if (old_tls_type != tls_type) - { - if (h != NULL) - elf32_nios2_hash_entry (h)->tls_type = tls_type; - else - elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type; - } - } - /* Fall through */ - case R_NIOS2_TLS_LDM16: - if (r_type == R_NIOS2_TLS_LDM16) - htab->tls_ldm_got.refcount++; - - if (htab->root.sgot == NULL) - { - if (htab->root.dynobj == NULL) - htab->root.dynobj = abfd; - if (!create_got_section (htab->root.dynobj, info)) - return FALSE; - } - break; - - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_NIOS2_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_NIOS2_GNU_VTENTRY: - if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) - return FALSE; - break; - - case R_NIOS2_BFD_RELOC_32: - case R_NIOS2_CALL26: - case R_NIOS2_HIADJ16: - case R_NIOS2_LO16: - - if (h != NULL) - { - /* If this reloc is in a read-only section, we might - need a copy reloc. We can't check reliably at this - stage whether the section is read-only, as input - sections have not yet been mapped to output sections. - Tentatively set the flag for now, and correct in - adjust_dynamic_symbol. */ - if (!info->shared) - h->non_got_ref = 1; - - /* Make sure a plt entry is created for this symbol if it - turns out to be a function defined by a dynamic object. */ - h->plt.refcount++; - - if (r_type == R_NIOS2_CALL26) - h->needs_plt = 1; - } - - /* If we are creating a shared library, we need to copy the - reloc into the shared library. */ - if (info->shared - && (sec->flags & SEC_ALLOC) != 0 - && (r_type == R_NIOS2_BFD_RELOC_32 - || (h != NULL && ! h->needs_plt - && (! info->symbolic || ! h->def_regular)))) - { - struct elf32_nios2_dyn_relocs *p; - struct elf32_nios2_dyn_relocs **head; - - /* When creating a shared object, we must copy these - reloc types into the output file. We create a reloc - section in dynobj and make room for this reloc. */ - if (sreloc == NULL) - { - sreloc = _bfd_elf_make_dynamic_reloc_section - (sec, dynobj, 2, abfd, 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) - head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs; - else - { - /* Track dynamic relocs needed for local syms too. - We really need local syms available to do this - easily. Oh well. */ - - 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 elf32_nios2_dyn_relocs **) vpp; - } - - p = *head; - if (p == NULL || p->sec != sec) - { - bfd_size_type amt = sizeof *p; - p = ((struct elf32_nios2_dyn_relocs *) - bfd_alloc (htab->root.dynobj, amt)); - if (p == NULL) - return FALSE; - p->next = *head; - *head = p; - p->sec = sec; - p->count = 0; - p->pc_count = 0; - } - - p->count += 1; - - } - break; - } - } - - return TRUE; -} - - -/* Implement elf_backend_gc_mark_hook: - Return the section that should be marked against GC for a given - relocation. */ -static asection * -nios2_elf32_gc_mark_hook (asection *sec, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - Elf_Internal_Rela *rel, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - if (h != NULL) - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_NIOS2_GNU_VTINHERIT: - case R_NIOS2_GNU_VTENTRY: - return NULL; - } - return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); -} - -/* Implement elf_backend_gc_sweep_hook: - Update the got entry reference counts for the section being removed. */ -static bfd_boolean -nios2_elf32_gc_sweep_hook (bfd *abfd, - struct bfd_link_info *info, - asection *sec, - const Elf_Internal_Rela *relocs) -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel, *relend; - bfd *dynobj; - - if (info->relocatable) - return TRUE; - - elf_section_data (sec)->local_dynrel = NULL; - - dynobj = elf_hash_table (info)->dynobj; - if (dynobj == NULL) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - { - unsigned long r_symndx; - struct elf_link_hash_entry *h = NULL; - int r_type; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - } - - r_type = ELF32_R_TYPE (rel->r_info); - switch (r_type) - { - case R_NIOS2_GOT16: - case R_NIOS2_CALL16: - if (h != NULL) - { - if (h->got.refcount > 0) - --h->got.refcount; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - --local_got_refcounts[r_symndx]; - } - break; - - case R_NIOS2_PCREL_LO: - case R_NIOS2_PCREL_HA: - case R_NIOS2_BFD_RELOC_32: - case R_NIOS2_CALL26: - if (h != NULL) - { - struct elf32_nios2_link_hash_entry *eh; - struct elf32_nios2_dyn_relocs **pp; - struct elf32_nios2_dyn_relocs *p; - - eh = (struct elf32_nios2_link_hash_entry *) h; - - if (h->plt.refcount > 0) - --h->plt.refcount; - - if (r_type == R_NIOS2_PCREL_LO || r_type == R_NIOS2_PCREL_HA - || r_type == R_NIOS2_BFD_RELOC_32) - { - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; - pp = &p->next) - if (p->sec == sec) - { - p->count -= 1; - if (p->count == 0) - *pp = p->next; - break; - } - } - } - break; - - default: - break; - } - } - - return TRUE; -} - -/* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */ -static void -nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value) -{ - bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset); - - BFD_ASSERT(value <= 0xffff); - - bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6), - sec->contents + offset); -} - -/* Install COUNT 32-bit values DATA starting at offset OFFSET into - section SEC. */ -static void -nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset, - int count) -{ - while (count--) - { - bfd_put_32 (sec->owner, *data, sec->contents + offset); - offset += 4; - ++data; - } -} - -/* Implement elf_backend_finish_dynamic_symbols: - Finish up dynamic symbol handling. We set the contents of various - dynamic sections here. */ -static bfd_boolean -nios2_elf32_finish_dynamic_symbol (bfd *output_bfd, - struct bfd_link_info *info, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - struct elf32_nios2_link_hash_table *htab; - struct elf32_nios2_link_hash_entry *eh - = (struct elf32_nios2_link_hash_entry *)h; - int use_plt; - - htab = elf32_nios2_hash_table (info); - - if (h->plt.offset != (bfd_vma) -1) - { - asection *splt; - asection *sgotplt; - asection *srela; - bfd_vma plt_index; - bfd_vma got_offset; - Elf_Internal_Rela rela; - bfd_byte *loc; - bfd_vma got_address; - - /* This symbol has an entry in the procedure linkage table. Set - it up. */ - BFD_ASSERT (h->dynindx != -1); - splt = htab->root.splt; - sgotplt = htab->root.sgotplt; - srela = htab->root.srelplt; - BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL); - - /* Emit the PLT entry. */ - if (info->shared) - { - nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset, - 3); - plt_index = (h->plt.offset - 24) / 12; - got_offset = (plt_index + 3) * 4; - nios2_elf32_install_imm16 (splt, h->plt.offset, - hiadj(plt_index * 4)); - nios2_elf32_install_imm16 (splt, h->plt.offset + 4, - (plt_index * 4) & 0xffff); - nios2_elf32_install_imm16 (splt, h->plt.offset + 8, - 0xfff4 - h->plt.offset); - got_address = (sgotplt->output_section->vma + sgotplt->output_offset - + got_offset); - - /* Fill in the entry in the global offset table. There are no - res_n slots for a shared object PLT, instead the .got.plt entries - point to the PLT entries. */ - bfd_put_32 (output_bfd, - splt->output_section->vma + splt->output_offset - + h->plt.offset, sgotplt->contents + got_offset); - } - else - { - plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12; - got_offset = (plt_index + 3) * 4; - - nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3); - got_address = (sgotplt->output_section->vma + sgotplt->output_offset - + got_offset); - nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address)); - nios2_elf32_install_imm16 (splt, h->plt.offset + 4, - got_address & 0xffff); - - /* Fill in the entry in the global offset table. */ - bfd_put_32 (output_bfd, - splt->output_section->vma + splt->output_offset - + plt_index * 4, sgotplt->contents + got_offset); - } - - /* Fill in the entry in the .rela.plt section. */ - rela.r_offset = got_address; - rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT); - rela.r_addend = 0; - loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - - if (!h->def_regular) - { - /* Mark the symbol as undefined, rather than as defined in - the .plt section. Leave the value alone. */ - sym->st_shndx = SHN_UNDEF; - /* If the symbol is weak, we do need to clear the value. - Otherwise, the PLT entry would provide a definition for - the symbol even if the symbol wasn't defined anywhere, - and so the symbol would never be NULL. */ - if (!h->ref_regular_nonweak) - sym->st_value = 0; - } - } - - use_plt = (eh->got_types_used == CALL16_USED - && h->plt.offset != (bfd_vma) -1); - - if (!use_plt && h->got.offset != (bfd_vma) -1 - && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 - && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) - { - asection *sgot; - asection *srela; - Elf_Internal_Rela rela; - bfd_byte *loc; - bfd_vma offset; - - /* This symbol has an entry in the global offset table. Set it - up. */ - sgot = htab->root.sgot; - srela = htab->root.srelgot; - BFD_ASSERT (sgot != NULL && srela != NULL); - - offset = (h->got.offset & ~(bfd_vma) 1); - rela.r_offset = (sgot->output_section->vma - + sgot->output_offset + offset); - - /* If this is a -Bsymbolic link, and the symbol is defined - locally, we just want to emit a RELATIVE reloc. Likewise if - the symbol was forced to be local because of a version file. - The entry in the global offset table will already have been - initialized in the relocate_section function. */ - - if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) - { - rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); - rela.r_addend = bfd_get_signed_32 (output_bfd, - (sgot->contents + offset)); - bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); - } - else - { - bfd_put_32 (output_bfd, (bfd_vma) 0, - sgot->contents + offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT); - rela.r_addend = 0; - } - - loc = srela->contents; - loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - } - - if (use_plt && h->got.offset != (bfd_vma) -1) - { - bfd_vma offset = (h->got.offset & ~(bfd_vma) 1); - asection *sgot = htab->root.sgot; - asection *splt = htab->root.splt; - bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset - + h->plt.offset), - sgot->contents + offset); - } - - if (h->needs_copy) - { - asection *s; - Elf_Internal_Rela rela; - bfd_byte *loc; - - /* This symbol needs a copy reloc. Set it up. */ - BFD_ASSERT (h->dynindx != -1 - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)); - - s = htab->srelbss; - BFD_ASSERT (s != NULL); - - 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 = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY); - rela.r_addend = 0; - loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - } - - /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ - if (strcmp (h->root.root.string, "_DYNAMIC") == 0 - || h == elf_hash_table (info)->hgot) - sym->st_shndx = SHN_ABS; - - return TRUE; -} - -/* Implement elf_backend_finish_dynamic_sections. */ -static bfd_boolean -nios2_elf32_finish_dynamic_sections (bfd *output_bfd, - struct bfd_link_info *info) -{ - bfd *dynobj; - asection *sgotplt; - asection *sdyn; - struct elf32_nios2_link_hash_table *htab; - - htab = elf32_nios2_hash_table (info); - dynobj = elf_hash_table (info)->dynobj; - sgotplt = htab->root.sgotplt; - BFD_ASSERT (sgotplt != NULL); - sdyn = bfd_get_linker_section (dynobj, ".dynamic"); - - if (elf_hash_table (info)->dynamic_sections_created) - { - asection *splt; - Elf32_External_Dyn *dyncon, *dynconend; - - splt = htab->root.splt; - BFD_ASSERT (splt != NULL && sdyn != NULL); - - dyncon = (Elf32_External_Dyn *) sdyn->contents; - dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); - for (; dyncon < dynconend; dyncon++) - { - Elf_Internal_Dyn dyn; - asection *s; - - bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); - - switch (dyn.d_tag) - { - default: - break; - - case DT_PLTGOT: - s = htab->root.sgot; - BFD_ASSERT (s != NULL); - dyn.d_un.d_ptr = s->output_section->vma; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_JMPREL: - s = htab->root.srelplt; - BFD_ASSERT (s != NULL); - dyn.d_un.d_ptr = s->output_section->vma; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_PLTRELSZ: - s = htab->root.srelplt; - BFD_ASSERT (s != NULL); - dyn.d_un.d_val = s->size; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_RELASZ: - /* The procedure linkage table relocs (DT_JMPREL) should - not be included in the overall relocs (DT_RELA). - Therefore, we override the DT_RELASZ entry here to - make it not include the JMPREL relocs. Since the - linker script arranges for .rela.plt to follow all - other relocation sections, we don't have to worry - about changing the DT_RELA entry. */ - s = htab->root.srelplt; - if (s != NULL) - dyn.d_un.d_val -= s->size; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - - case DT_NIOS2_GP: - s = htab->root.sgot; - BFD_ASSERT (s != NULL); - dyn.d_un.d_ptr = s->output_section->vma + 0x7ff0; - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); - break; - } - } - - /* Fill in the first entry in the procedure linkage table. */ - if (splt->size > 0) - { - bfd_vma got_address = (sgotplt->output_section->vma - + sgotplt->output_offset); - if (info->shared) - { - bfd_vma corrected = got_address - (splt->output_section->vma - + splt->output_offset + 4); - nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6); - nios2_elf32_install_imm16 (splt, 4, hiadj (corrected)); - nios2_elf32_install_imm16 (splt, 12, (corrected & 0xffff) + 4); - nios2_elf32_install_imm16 (splt, 16, (corrected & 0xffff) + 8); - } - else - { - /* Divide by 4 here, not 3 because we already corrected for the - res_N branches. */ - bfd_vma res_size = (splt->size - 28) / 4; - bfd_vma res_start = (splt->output_section->vma - + splt->output_offset); - bfd_vma res_offset; - - for (res_offset = 0; res_offset < res_size; res_offset += 4) - bfd_put_32 (output_bfd, - 6 | ((res_size - (res_offset + 4)) << 6), - splt->contents + res_offset); - - nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7); - nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start)); - nios2_elf32_install_imm16 (splt, res_size + 4, - res_start & 0xffff); - nios2_elf32_install_imm16 (splt, res_size + 12, - hiadj (got_address)); - nios2_elf32_install_imm16 (splt, res_size + 16, - (got_address & 0xffff) + 4); - nios2_elf32_install_imm16 (splt, res_size + 20, - (got_address & 0xffff) + 8); - } - } - } - /* Fill in the first three entries in the global offset table. */ - if (sgotplt->size > 0) - { - if (sdyn == NULL) - bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents); - else - bfd_put_32 (output_bfd, - sdyn->output_section->vma + sdyn->output_offset, - sgotplt->contents); - bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4); - bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8); - } - - elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4; - - return TRUE; -} - -/* Implement elf_backend_adjust_dynamic_symbol: - 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 -nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info, - struct elf_link_hash_entry *h) -{ - struct elf32_nios2_link_hash_table *htab; - bfd *dynobj; - asection *s; - unsigned align2; - - htab = elf32_nios2_hash_table (info); - dynobj = elf_hash_table (info)->dynobj; - - /* Make sure we know what is going on here. */ - BFD_ASSERT (dynobj != NULL - && (h->needs_plt - || h->u.weakdef != NULL - || (h->def_dynamic - && h->ref_regular - && !h->def_regular))); - - /* If this is a function, put it in the procedure linkage table. We - will fill in the contents of the procedure linkage table later, - when we know the address of the .got section. */ - if (h->type == STT_FUNC || h->needs_plt) - { - if (h->plt.refcount <= 0 - || SYMBOL_CALLS_LOCAL (info, h) - || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - && h->root.type == bfd_link_hash_undefweak)) - { - /* This case can occur if we saw a PLT reloc in an input - file, but the symbol was never referred to by a dynamic - object, or if all references were garbage collected. In - such a case, we don't actually need to build a procedure - linkage table, and we can just do a PCREL reloc instead. */ - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - } - - return TRUE; - } - - /* Reinitialize the plt offset now that it is not used as a reference - count any more. */ - h->plt.offset = (bfd_vma) -1; - - /* 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; - return TRUE; - } - - /* If there are no non-GOT references, we do not need a copy - relocation. */ - if (!h->non_got_ref) - return TRUE; - - /* This is a reference to a symbol defined by a dynamic object which - is not a function. - 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 (h->size == 0) - { - (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), - h->root.root.string); - return TRUE; - } - - /* 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. */ - s = htab->sdynbss; - BFD_ASSERT (s != NULL); - - /* We must generate a R_NIOS2_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) - { - asection *srel; - - srel = htab->srelbss; - BFD_ASSERT (srel != NULL); - srel->size += sizeof (Elf32_External_Rela); - h->needs_copy = 1; - } - - align2 = bfd_log2 (h->size); - if (align2 > h->root.u.def.section->alignment_power) - align2 = h->root.u.def.section->alignment_power; - - /* Align dynbss. */ - s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2); - if (align2 > bfd_get_section_alignment (dynobj, s) - && !bfd_set_section_alignment (dynobj, s, align2)) - return FALSE; - - /* Define the symbol as being at this point in the section. */ - h->root.u.def.section = s; - h->root.u.def.value = s->size; - - /* Increment the section size to make room for the symbol. */ - s->size += h->size; - - return TRUE; -} - -/* Worker function for nios2_elf32_size_dynamic_sections. */ -static bfd_boolean -adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf) -{ - struct bfd_link_info *info; - struct elf32_nios2_link_hash_table *htab; - - if (h->root.type == bfd_link_hash_indirect) - return TRUE; - - if (h->root.type == bfd_link_hash_warning) - /* When warning symbols are created, they **replace** the "real" - entry in the hash table, thus we never get to see the real - symbol in a hash traversal. So look at it now. */ - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - info = (struct bfd_link_info *) inf; - htab = elf32_nios2_hash_table (info); - - if (h->plt.offset != (bfd_vma)-1) - h->plt.offset += htab->res_n_size; - if (htab->root.splt == h->root.u.def.section) - h->root.u.def.value += htab->res_n_size; - - return TRUE; -} - -/* Another worker function for nios2_elf32_size_dynamic_sections. - Allocate space in .plt, .got and associated reloc sections for - dynamic relocs. */ -static bfd_boolean -allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) -{ - struct bfd_link_info *info; - struct elf32_nios2_link_hash_table *htab; - struct elf32_nios2_link_hash_entry *eh; - struct elf32_nios2_dyn_relocs *p; - int use_plt; - - if (h->root.type == bfd_link_hash_indirect) - return TRUE; - - if (h->root.type == bfd_link_hash_warning) - /* When warning symbols are created, they **replace** the "real" - entry in the hash table, thus we never get to see the real - symbol in a hash traversal. So look at it now. */ - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - info = (struct bfd_link_info *) inf; - htab = elf32_nios2_hash_table (info); - - if (htab->root.dynamic_sections_created - && h->plt.refcount > 0) - { - /* 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 - && !bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) - { - asection *s = htab->root.splt; - - /* Allocate room for the header. */ - if (s->size == 0) - { - if (info->shared) - s->size = 24; - else - s->size = 28; - } - - h->plt.offset = s->size; - - /* If this symbol is not defined in a regular file, and we are - not generating a shared library, then set the symbol to this - location in the .plt. This is required to make function - pointers compare as equal between the normal executable and - the shared library. */ - if (! info->shared - && !h->def_regular) - { - h->root.u.def.section = s; - h->root.u.def.value = h->plt.offset; - } - - /* Make room for this entry. */ - s->size += 12; - - /* We also need to make an entry in the .rela.plt section. */ - htab->root.srelplt->size += sizeof (Elf32_External_Rela); - - /* And the .got.plt section. */ - htab->root.sgotplt->size += 4; - } - else - { - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - } - } - else - { - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - } - - eh = (struct elf32_nios2_link_hash_entry *) h; - use_plt = (eh->got_types_used == CALL16_USED - && h->plt.offset != (bfd_vma) -1); - - if (h->got.refcount > 0) - { - asection *s; - bfd_boolean dyn; - int tls_type = eh->tls_type; - int indx; - - /* 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 - && !bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - - s = htab->root.sgot; - h->got.offset = s->size; - - if (tls_type == GOT_UNKNOWN) - abort (); - - if (tls_type == GOT_NORMAL) - /* Non-TLS symbols need one GOT slot. */ - s->size += 4; - else - { - if (tls_type & GOT_TLS_GD) - /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */ - s->size += 8; - if (tls_type & GOT_TLS_IE) - /* R_NIOS2_TLS_IE16 needs one GOT slot. */ - s->size += 4; - } - - dyn = htab->root.dynamic_sections_created; - - indx = 0; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) - && (!info->shared - || !SYMBOL_REFERENCES_LOCAL (info, h))) - indx = h->dynindx; - - if (tls_type != GOT_NORMAL - && (info->shared || indx != 0) - && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak)) - { - if (tls_type & GOT_TLS_IE) - htab->root.srelgot->size += sizeof (Elf32_External_Rela); - - if (tls_type & GOT_TLS_GD) - htab->root.srelgot->size += sizeof (Elf32_External_Rela); - - if ((tls_type & GOT_TLS_GD) && indx != 0) - htab->root.srelgot->size += sizeof (Elf32_External_Rela); - } - else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak) - && !use_plt - && (info->shared - || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) - htab->root.srelgot->size += sizeof (Elf32_External_Rela); - } - else - h->got.offset = (bfd_vma) -1; - - if (eh->dyn_relocs == NULL) - 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 pc-relative relocs that have become local due to symbol - visibility changes. */ - - if (info->shared) - { - if (h->def_regular - && (h->forced_local || info->symbolic)) - { - struct elf32_nios2_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 undefined weak symbols are output as a dynamic - symbol in PIEs. */ - else if (h->dynindx == -1 - && !h->forced_local - && !bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - } - } - else - { - /* 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_dynamic && !h->def_regular) - || (htab->root.dynamic_sections_created - && (h->root.type == bfd_link_hash_undefweak - || h->root.type == bfd_link_hash_undefined)))) - { - /* 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 - && !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; - sreloc->size += p->count * sizeof (Elf32_External_Rela); - } - - return TRUE; -} - -/* Implement elf_backend_size_dynamic_sections: - Set the sizes of the dynamic sections. */ -static bfd_boolean -nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info) -{ - bfd *dynobj; - asection *s; - bfd_boolean plt; - bfd_boolean got; - bfd_boolean relocs; - bfd *ibfd; - struct elf32_nios2_link_hash_table *htab; - - htab = elf32_nios2_hash_table (info); - dynobj = elf_hash_table (info)->dynobj; - BFD_ASSERT (dynobj != NULL); - - htab->res_n_size = 0; - if (elf_hash_table (info)->dynamic_sections_created) - { - /* Set the contents of the .interp section to the interpreter. */ - if (info->executable) - { - s = bfd_get_linker_section (dynobj, ".interp"); - BFD_ASSERT (s != NULL); - s->size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; - } - } - else - { - /* We may have created entries in the .rela.got section. - However, if we are not creating the dynamic sections, we will - not actually use these entries. Reset the size of .rela.got, - which will cause it to get stripped from the output file - below. */ - s = htab->root.srelgot; - if (s != NULL) - s->size = 0; - } - - /* Set up .got offsets for local syms, and space for local dynamic - relocs. */ - for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) - { - bfd_signed_vma *local_got; - bfd_signed_vma *end_local_got; - char *local_tls_type; - bfd_size_type locsymcount; - Elf_Internal_Shdr *symtab_hdr; - asection *srel; - - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) - continue; - - for (s = ibfd->sections; s != NULL; s = s->next) - { - struct elf32_nios2_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) - { - srel = elf_section_data (p->sec)->sreloc; - srel->size += p->count * sizeof (Elf32_External_Rela); - if ((p->sec->output_section->flags & SEC_READONLY) != 0) - info->flags |= DF_TEXTREL; - } - } - } - - local_got = elf_local_got_refcounts (ibfd); - if (!local_got) - continue; - - symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - locsymcount = symtab_hdr->sh_info; - end_local_got = local_got + locsymcount; - local_tls_type = elf32_nios2_local_got_tls_type (ibfd); - s = htab->root.sgot; - srel = htab->root.srelgot; - for (; local_got < end_local_got; ++local_got, ++local_tls_type) - { - if (*local_got > 0) - { - *local_got = s->size; - if (*local_tls_type & GOT_TLS_GD) - /* TLS_GD relocs need an 8-byte structure in the GOT. */ - s->size += 8; - if (*local_tls_type & GOT_TLS_IE) - s->size += 4; - if (*local_tls_type == GOT_NORMAL) - s->size += 4; - - if (info->shared || *local_tls_type == GOT_TLS_GD) - srel->size += sizeof (Elf32_External_Rela); - } - else - *local_got = (bfd_vma) -1; - } - } - - if (htab->tls_ldm_got.refcount > 0) - { - /* Allocate two GOT entries and one dynamic relocation (if necessary) - for R_NIOS2_TLS_LDM16 relocations. */ - htab->tls_ldm_got.offset = htab->root.sgot->size; - htab->root.sgot->size += 8; - if (info->shared) - htab->root.srelgot->size += sizeof (Elf32_External_Rela); - } - else - htab->tls_ldm_got.offset = -1; - - /* Allocate global sym .plt and .got entries, and space for global - sym dynamic relocs. */ - elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); - - /* The check_relocs and adjust_dynamic_symbol entry points have - determined the sizes of the various dynamic sections. Allocate - memory for them. */ - plt = FALSE; - got = FALSE; - relocs = FALSE; - for (s = dynobj->sections; s != NULL; s = s->next) - { - const char *name; - - if ((s->flags & SEC_LINKER_CREATED) == 0) - continue; - - /* It's OK to base decisions on the section name, because none - of the dynobj section names depend upon the input files. */ - name = bfd_get_section_name (dynobj, s); - - if (strcmp (name, ".plt") == 0) - { - /* Remember whether there is a PLT. */ - plt = s->size != 0; - - /* Correct for the number of res_N branches. */ - if (plt && !info->shared) - { - htab->res_n_size = (s->size-28) / 3; - s->size += htab->res_n_size; - } - } - else if (CONST_STRNEQ (name, ".rela")) - { - if (s->size != 0) - { - 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 if (CONST_STRNEQ (name, ".got")) - got = s->size != 0; - else if (strcmp (name, ".dynbss") != 0) - /* 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. */ - /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. - Unused entries should be reclaimed before the section's contents - are written out, but at the moment this does not happen. Thus in - order to prevent writing out garbage, we initialize the section's - contents to zero. */ - s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); - if (s->contents == NULL) - return FALSE; - } - - /* Adjust dynamic symbols that point to the plt to account for the - now-known number of resN slots. */ - if (htab->res_n_size) - elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info); - - if (elf_hash_table (info)->dynamic_sections_created) - { - /* Add some entries to the .dynamic section. We fill in the - values later, in elf_nios2_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->shared && !add_dynamic_entry (DT_DEBUG, 0)) - return FALSE; - - if (got && !add_dynamic_entry (DT_PLTGOT, 0)) - return FALSE; - - if (plt - && (!add_dynamic_entry (DT_PLTRELSZ, 0) - || !add_dynamic_entry (DT_PLTREL, DT_RELA) - || !add_dynamic_entry (DT_JMPREL, 0))) - return FALSE; - - if (relocs - && (!add_dynamic_entry (DT_RELA, 0) - || !add_dynamic_entry (DT_RELASZ, 0) - || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))) - return FALSE; - - if (!info->shared && !add_dynamic_entry (DT_NIOS2_GP, 0)) - return FALSE; - - if ((info->flags & DF_TEXTREL) != 0 - && !add_dynamic_entry (DT_TEXTREL, 0)) - return FALSE; - } -#undef add_dynamic_entry - - return TRUE; -} - -/* Implement bfd_elf32_bfd_link_hash_table_create. */ -static struct bfd_link_hash_table * -nios2_elf32_link_hash_table_create (bfd *abfd) -{ - struct elf32_nios2_link_hash_table *ret; - bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table); - - ret = bfd_zmalloc (amt); - if (ret == NULL) - return NULL; - - if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, - link_hash_newfunc, - sizeof (struct - elf32_nios2_link_hash_entry), - NIOS2_ELF_DATA)) - { - free (ret); - return NULL; - } - - return &ret->root.root; -} - -/* Implement elf_backend_reloc_type_class. */ -static enum elf_reloc_type_class -nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, - const asection *rel_sec ATTRIBUTE_UNUSED, - const Elf_Internal_Rela *rela) -{ - switch ((int) ELF32_R_TYPE (rela->r_info)) - { - case R_NIOS2_RELATIVE: - return reloc_class_relative; - case R_NIOS2_JUMP_SLOT: - return reloc_class_plt; - case R_NIOS2_COPY: - return reloc_class_copy; - default: - return reloc_class_normal; - } -} - -/* Return 1 if target is one of ours. */ -static bfd_boolean -is_nios2_elf_target (const struct bfd_target *targ) -{ - return (targ == &bfd_elf32_littlenios2_vec - || targ == &bfd_elf32_bignios2_vec); -} - -/* Implement elf_backend_add_symbol_hook. - This hook is called by the linker when adding symbols from an object - file. We use it to put .comm items in .sbss, and not .bss. */ -static bfd_boolean -nios2_elf_add_symbol_hook (bfd *abfd, - struct bfd_link_info *info, - Elf_Internal_Sym *sym, - const char **namep ATTRIBUTE_UNUSED, - flagword *flagsp ATTRIBUTE_UNUSED, - asection **secp, - bfd_vma *valp) -{ - bfd *dynobj; - - if (sym->st_shndx == SHN_COMMON - && !info->relocatable - && sym->st_size <= elf_gp_size (abfd) - && is_nios2_elf_target (info->output_bfd->xvec)) - { - /* Common symbols less than or equal to -G nn bytes are automatically - put into .sbss. */ - struct elf32_nios2_link_hash_table *htab; - - htab = elf32_nios2_hash_table (info); - if (htab->sbss == NULL) - { - flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; - - dynobj = elf_hash_table (info)->dynobj; - if (!dynobj) - dynobj = abfd; - - htab->sbss = bfd_make_section_anyway_with_flags (dynobj, ".sbss", - flags); - if (htab->sbss == NULL) - return FALSE; - } - - *secp = htab->sbss; - *valp = sym->st_size; - } - - return TRUE; -} - -/* Implement elf_backend_can_make_relative_eh_frame: - Decide whether to attempt to turn absptr or lsda encodings in - shared libraries into pcrel within the given input section. */ -static bfd_boolean -nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info - ATTRIBUTE_UNUSED, - asection *eh_frame_section - ATTRIBUTE_UNUSED) -{ - /* We can't use PC-relative encodings in the .eh_frame section. */ - return FALSE; -} - -/* Implement elf_backend_special_sections. */ -const struct bfd_elf_special_section elf32_nios2_special_sections[] = -{ - { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, - SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, - { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, - SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, - { NULL, 0, 0, 0, 0 } -}; - -#define ELF_ARCH bfd_arch_nios2 -#define ELF_TARGET_ID NIOS2_ELF_DATA -#define ELF_MACHINE_CODE EM_ALTERA_NIOS2 - -/* The Nios II MMU uses a 4K page size. */ - -#define ELF_MAXPAGESIZE 0x1000 - -#define bfd_elf32_bfd_link_hash_table_create \ - nios2_elf32_link_hash_table_create - -/* Relocation table lookup macros. */ - -#define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup -#define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup - -/* JUMP_TABLE_LINK macros. */ - -/* elf_info_to_howto (using RELA relocations). */ - -#define elf_info_to_howto nios2_elf32_info_to_howto - -/* elf backend functions. */ - -#define elf_backend_can_gc_sections 1 -#define elf_backend_can_refcount 1 -#define elf_backend_plt_readonly 1 -#define elf_backend_want_got_plt 1 -#define elf_backend_rela_normal 1 - -#define elf_backend_relocate_section nios2_elf32_relocate_section -#define elf_backend_section_flags nios2_elf32_section_flags -#define elf_backend_fake_sections nios2_elf32_fake_sections -#define elf_backend_check_relocs nios2_elf32_check_relocs - -#define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook -#define elf_backend_gc_sweep_hook nios2_elf32_gc_sweep_hook -#define elf_backend_create_dynamic_sections \ - nios2_elf32_create_dynamic_sections -#define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol -#define elf_backend_finish_dynamic_sections \ - nios2_elf32_finish_dynamic_sections -#define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol -#define elf_backend_reloc_type_class nios2_elf32_reloc_type_class -#define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections -#define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook -#define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol - -#define elf_backend_grok_prstatus nios2_grok_prstatus -#define elf_backend_grok_psinfo nios2_grok_psinfo - -#undef elf_backend_can_make_relative_eh_frame -#define elf_backend_can_make_relative_eh_frame \ - nios2_elf32_can_make_relative_eh_frame - -#define elf_backend_special_sections elf32_nios2_special_sections - -#define TARGET_LITTLE_SYM bfd_elf32_littlenios2_vec -#define TARGET_LITTLE_NAME "elf32-littlenios2" -#define TARGET_BIG_SYM bfd_elf32_bignios2_vec -#define TARGET_BIG_NAME "elf32-bignios2" - -#define elf_backend_got_header_size 12 - -#include "elf32-target.h" |