diff options
Diffstat (limited to 'binutils-2.25/bfd/elf32-m68k.c')
| -rw-r--r-- | binutils-2.25/bfd/elf32-m68k.c | 4884 |
1 files changed, 4884 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf32-m68k.c b/binutils-2.25/bfd/elf32-m68k.c new file mode 100644 index 00000000..f266d63a --- /dev/null +++ b/binutils-2.25/bfd/elf32-m68k.c @@ -0,0 +1,4884 @@ +/* Motorola 68k series support for 32-bit ELF + Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, + 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 + Free Software Foundation, 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. */ + +#include "sysdep.h" +#include "bfd.h" +#include "bfdlink.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/m68k.h" +#include "opcode/m68k.h" + +static bfd_boolean +elf_m68k_discard_copies (struct elf_link_hash_entry *, void *); + +static reloc_howto_type howto_table[] = +{ + HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE), + HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE), + HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE), + HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE), + HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE), + HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE), + HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE), + HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE), + HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE), + HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE), + HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE), + HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE), + HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE), + HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE), + HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE), + HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE), + HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE), + HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE), + HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE), + HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE), + HOWTO(R_68K_GLOB_DAT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", FALSE, 0, 0xffffffff,FALSE), + HOWTO(R_68K_JMP_SLOT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", FALSE, 0, 0xffffffff,FALSE), + HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE), + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_68K_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_68K_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_68K_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_68K_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), + + /* TLS general dynamic variable reference. */ + HOWTO (R_68K_TLS_GD32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_GD32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_GD16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_GD16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_GD8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_GD8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* TLS local dynamic variable reference. */ + HOWTO (R_68K_TLS_LDM32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LDM32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LDM16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LDM16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LDM8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LDM8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LDO32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LDO32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LDO16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LDO16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LDO8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LDO8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* TLS initial execution variable reference. */ + HOWTO (R_68K_TLS_IE32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_IE32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_IE16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_IE16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_IE8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_IE8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* TLS local execution variable reference. */ + HOWTO (R_68K_TLS_LE32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LE32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LE16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LE16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_LE8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_LE8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* TLS GD/LD dynamic relocations. */ + HOWTO (R_68K_TLS_DTPMOD32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_DTPMOD32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_DTPREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_DTPREL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_68K_TLS_TPREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_68K_TLS_TPREL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + +static void +rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) +{ + unsigned int indx = ELF32_R_TYPE (dst->r_info); + + if (indx >= (unsigned int) R_68K_max) + { + (*_bfd_error_handler) (_("%B: invalid relocation type %d"), + abfd, (int) indx); + indx = R_68K_NONE; + } + cache_ptr->howto = &howto_table[indx]; +} + +#define elf_info_to_howto rtype_to_howto + +static const struct +{ + bfd_reloc_code_real_type bfd_val; + int elf_val; +} + reloc_map[] = +{ + { BFD_RELOC_NONE, R_68K_NONE }, + { BFD_RELOC_32, R_68K_32 }, + { BFD_RELOC_16, R_68K_16 }, + { BFD_RELOC_8, R_68K_8 }, + { BFD_RELOC_32_PCREL, R_68K_PC32 }, + { BFD_RELOC_16_PCREL, R_68K_PC16 }, + { BFD_RELOC_8_PCREL, R_68K_PC8 }, + { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, + { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, + { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, + { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, + { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, + { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, + { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, + { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, + { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, + { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, + { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, + { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, + { BFD_RELOC_NONE, R_68K_COPY }, + { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, + { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, + { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, + { BFD_RELOC_CTOR, R_68K_32 }, + { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, + { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, + { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 }, + { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 }, + { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 }, + { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 }, + { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 }, + { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 }, + { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 }, + { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 }, + { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 }, + { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 }, + { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 }, + { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 }, + { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 }, + { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 }, + { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 }, +}; + +static reloc_howto_type * +reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + unsigned int i; + for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) + { + if (reloc_map[i].bfd_val == code) + return &howto_table[reloc_map[i].elf_val]; + } + return 0; +} + +static reloc_howto_type * +reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) +{ + unsigned int i; + + for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) + if (howto_table[i].name != NULL + && strcasecmp (howto_table[i].name, r_name) == 0) + return &howto_table[i]; + + return NULL; +} + +#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup +#define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup +#define ELF_ARCH bfd_arch_m68k +#define ELF_TARGET_ID M68K_ELF_DATA + +/* Functions for the m68k ELF linker. */ + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" + +/* Describes one of the various PLT styles. */ + +struct elf_m68k_plt_info +{ + /* The size of each PLT entry. */ + bfd_vma size; + + /* The template for the first PLT entry. */ + const bfd_byte *plt0_entry; + + /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations. + The comments by each member indicate the value that the relocation + is against. */ + struct { + unsigned int got4; /* .got + 4 */ + unsigned int got8; /* .got + 8 */ + } plt0_relocs; + + /* The template for a symbol's PLT entry. */ + const bfd_byte *symbol_entry; + + /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations. + The comments by each member indicate the value that the relocation + is against. */ + struct { + unsigned int got; /* the symbol's .got.plt entry */ + unsigned int plt; /* .plt */ + } symbol_relocs; + + /* The offset of the resolver stub from the start of SYMBOL_ENTRY. + The stub starts with "move.l #relocoffset,%d0". */ + bfd_vma symbol_resolve_entry; +}; + +/* The size in bytes of an entry in the procedure linkage table. */ + +#define PLT_ENTRY_SIZE 20 + +/* The first entry in a procedure linkage table looks like this. See + the SVR4 ABI m68k supplement to see how this works. */ + +static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = +{ + 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ + 0, 0, 0, 2, /* + (.got + 4) - . */ + 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ + 0, 0, 0, 2, /* + (.got + 8) - . */ + 0, 0, 0, 0 /* pad out to 20 bytes. */ +}; + +/* Subsequent entries in a procedure linkage table look like this. */ + +static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = +{ + 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ + 0, 0, 0, 2, /* + (.got.plt entry) - . */ + 0x2f, 0x3c, /* move.l #offset,-(%sp) */ + 0, 0, 0, 0, /* + reloc index */ + 0x60, 0xff, /* bra.l .plt */ + 0, 0, 0, 0 /* + .plt - . */ +}; + +static const struct elf_m68k_plt_info elf_m68k_plt_info = { + PLT_ENTRY_SIZE, + elf_m68k_plt0_entry, { 4, 12 }, + elf_m68k_plt_entry, { 4, 16 }, 8 +}; + +#define ISAB_PLT_ENTRY_SIZE 24 + +static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] = +{ + 0x20, 0x3c, /* move.l #offset,%d0 */ + 0, 0, 0, 0, /* + (.got + 4) - . */ + 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */ + 0x20, 0x3c, /* move.l #offset,%d0 */ + 0, 0, 0, 0, /* + (.got + 8) - . */ + 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ + 0x4e, 0xd0, /* jmp (%a0) */ + 0x4e, 0x71 /* nop */ +}; + +/* Subsequent entries in a procedure linkage table look like this. */ + +static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] = +{ + 0x20, 0x3c, /* move.l #offset,%d0 */ + 0, 0, 0, 0, /* + (.got.plt entry) - . */ + 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ + 0x4e, 0xd0, /* jmp (%a0) */ + 0x2f, 0x3c, /* move.l #offset,-(%sp) */ + 0, 0, 0, 0, /* + reloc index */ + 0x60, 0xff, /* bra.l .plt */ + 0, 0, 0, 0 /* + .plt - . */ +}; + +static const struct elf_m68k_plt_info elf_isab_plt_info = { + ISAB_PLT_ENTRY_SIZE, + elf_isab_plt0_entry, { 2, 12 }, + elf_isab_plt_entry, { 2, 20 }, 12 +}; + +#define ISAC_PLT_ENTRY_SIZE 24 + +static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] = +{ + 0x20, 0x3c, /* move.l #offset,%d0 */ + 0, 0, 0, 0, /* replaced with .got + 4 - . */ + 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */ + 0x20, 0x3c, /* move.l #offset,%d0 */ + 0, 0, 0, 0, /* replaced with .got + 8 - . */ + 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ + 0x4e, 0xd0, /* jmp (%a0) */ + 0x4e, 0x71 /* nop */ +}; + +/* Subsequent entries in a procedure linkage table look like this. */ + +static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] = +{ + 0x20, 0x3c, /* move.l #offset,%d0 */ + 0, 0, 0, 0, /* replaced with (.got entry) - . */ + 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ + 0x4e, 0xd0, /* jmp (%a0) */ + 0x2f, 0x3c, /* move.l #offset,-(%sp) */ + 0, 0, 0, 0, /* replaced with offset into relocation table */ + 0x61, 0xff, /* bsr.l .plt */ + 0, 0, 0, 0 /* replaced with .plt - . */ +}; + +static const struct elf_m68k_plt_info elf_isac_plt_info = { + ISAC_PLT_ENTRY_SIZE, + elf_isac_plt0_entry, { 2, 12}, + elf_isac_plt_entry, { 2, 20 }, 12 +}; + +#define CPU32_PLT_ENTRY_SIZE 24 +/* Procedure linkage table entries for the cpu32 */ +static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] = +{ + 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ + 0, 0, 0, 2, /* + (.got + 4) - . */ + 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ + 0, 0, 0, 2, /* + (.got + 8) - . */ + 0x4e, 0xd1, /* jmp %a1@ */ + 0, 0, 0, 0, /* pad out to 24 bytes. */ + 0, 0 +}; + +static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] = +{ + 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ + 0, 0, 0, 2, /* + (.got.plt entry) - . */ + 0x4e, 0xd1, /* jmp %a1@ */ + 0x2f, 0x3c, /* move.l #offset,-(%sp) */ + 0, 0, 0, 0, /* + reloc index */ + 0x60, 0xff, /* bra.l .plt */ + 0, 0, 0, 0, /* + .plt - . */ + 0, 0 +}; + +static const struct elf_m68k_plt_info elf_cpu32_plt_info = { + CPU32_PLT_ENTRY_SIZE, + elf_cpu32_plt0_entry, { 4, 12 }, + elf_cpu32_plt_entry, { 4, 18 }, 10 +}; + +/* The m68k linker needs to keep track of the number of relocs that it + decides to copy in check_relocs for each symbol. This is so that it + can discard PC relative relocs if it doesn't need them when linking + with -Bsymbolic. We store the information in a field extending the + regular ELF linker hash table. */ + +/* This structure keeps track of the number of PC relative relocs we have + copied for a given symbol. */ + +struct elf_m68k_pcrel_relocs_copied +{ + /* Next section. */ + struct elf_m68k_pcrel_relocs_copied *next; + /* A section in dynobj. */ + asection *section; + /* Number of relocs copied in this section. */ + bfd_size_type count; +}; + +/* Forward declaration. */ +struct elf_m68k_got_entry; + +/* m68k ELF linker hash entry. */ + +struct elf_m68k_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* Number of PC relative relocs copied for this symbol. */ + struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; + + /* Key to got_entries. */ + unsigned long got_entry_key; + + /* List of GOT entries for this symbol. This list is build during + offset finalization and is used within elf_m68k_finish_dynamic_symbol + to traverse all GOT entries for a particular symbol. + + ??? We could've used root.got.glist field instead, but having + a separate field is cleaner. */ + struct elf_m68k_got_entry *glist; +}; + +#define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent)) + +/* Key part of GOT entry in hashtable. */ +struct elf_m68k_got_entry_key +{ + /* BFD in which this symbol was defined. NULL for global symbols. */ + const bfd *bfd; + + /* Symbol index. Either local symbol index or h->got_entry_key. */ + unsigned long symndx; + + /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32}, + R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}. + + From perspective of hashtable key, only elf_m68k_got_reloc_type (type) + matters. That is, we distinguish between, say, R_68K_GOT16O + and R_68K_GOT32O when allocating offsets, but they are considered to be + the same when searching got->entries. */ + enum elf_m68k_reloc_type type; +}; + +/* Size of the GOT offset suitable for relocation. */ +enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST }; + +/* Entry of the GOT. */ +struct elf_m68k_got_entry +{ + /* GOT entries are put into a got->entries hashtable. This is the key. */ + struct elf_m68k_got_entry_key key_; + + /* GOT entry data. We need s1 before offset finalization and s2 after. */ + union + { + struct + { + /* Number of times this entry is referenced. It is used to + filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook. */ + bfd_vma refcount; + } s1; + + struct + { + /* Offset from the start of .got section. To calculate offset relative + to GOT pointer one should substract got->offset from this value. */ + bfd_vma offset; + + /* Pointer to the next GOT entry for this global symbol. + Symbols have at most one entry in one GOT, but might + have entries in more than one GOT. + Root of this list is h->glist. + NULL for local symbols. */ + struct elf_m68k_got_entry *next; + } s2; + } u; +}; + +/* Return representative type for relocation R_TYPE. + This is used to avoid enumerating many relocations in comparisons, + switches etc. */ + +static enum elf_m68k_reloc_type +elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type) +{ + switch (r_type) + { + /* In most cases R_68K_GOTx relocations require the very same + handling as R_68K_GOT32O relocation. In cases when we need + to distinguish between the two, we use explicitly compare against + r_type. */ + case R_68K_GOT32: + case R_68K_GOT16: + case R_68K_GOT8: + case R_68K_GOT32O: + case R_68K_GOT16O: + case R_68K_GOT8O: + return R_68K_GOT32O; + + case R_68K_TLS_GD32: + case R_68K_TLS_GD16: + case R_68K_TLS_GD8: + return R_68K_TLS_GD32; + + case R_68K_TLS_LDM32: + case R_68K_TLS_LDM16: + case R_68K_TLS_LDM8: + return R_68K_TLS_LDM32; + + case R_68K_TLS_IE32: + case R_68K_TLS_IE16: + case R_68K_TLS_IE8: + return R_68K_TLS_IE32; + + default: + BFD_ASSERT (FALSE); + return 0; + } +} + +/* Return size of the GOT entry offset for relocation R_TYPE. */ + +static enum elf_m68k_got_offset_size +elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type) +{ + switch (r_type) + { + case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8: + case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32: + case R_68K_TLS_IE32: + return R_32; + + case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16: + case R_68K_TLS_IE16: + return R_16; + + case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8: + case R_68K_TLS_IE8: + return R_8; + + default: + BFD_ASSERT (FALSE); + return 0; + } +} + +/* Return number of GOT entries we need to allocate in GOT for + relocation R_TYPE. */ + +static bfd_vma +elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type) +{ + switch (elf_m68k_reloc_got_type (r_type)) + { + case R_68K_GOT32O: + case R_68K_TLS_IE32: + return 1; + + case R_68K_TLS_GD32: + case R_68K_TLS_LDM32: + return 2; + + default: + BFD_ASSERT (FALSE); + return 0; + } +} + +/* Return TRUE if relocation R_TYPE is a TLS one. */ + +static bfd_boolean +elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type) +{ + switch (r_type) + { + case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8: + case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8: + case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8: + case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8: + case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8: + case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32: + return TRUE; + + default: + return FALSE; + } +} + +/* Data structure representing a single GOT. */ +struct elf_m68k_got +{ + /* Hashtable of 'struct elf_m68k_got_entry's. + Starting size of this table is the maximum number of + R_68K_GOT8O entries. */ + htab_t entries; + + /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require + several GOT slots. + + n_slots[R_8] is the count of R_8 slots in this GOT. + n_slots[R_16] is the cumulative count of R_8 and R_16 slots + in this GOT. + n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots + in this GOT. This is the total number of slots. */ + bfd_vma n_slots[R_LAST]; + + /* Number of local (entry->key_.h == NULL) slots in this GOT. + This is only used to properly calculate size of .rela.got section; + see elf_m68k_partition_multi_got. */ + bfd_vma local_n_slots; + + /* Offset of this GOT relative to beginning of .got section. */ + bfd_vma offset; +}; + +/* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */ +struct elf_m68k_bfd2got_entry +{ + /* BFD. */ + const bfd *bfd; + + /* Assigned GOT. Before partitioning multi-GOT each BFD has its own + GOT structure. After partitioning several BFD's might [and often do] + share a single GOT. */ + struct elf_m68k_got *got; +}; + +/* The main data structure holding all the pieces. */ +struct elf_m68k_multi_got +{ + /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry + here, then it doesn't need a GOT (this includes the case of a BFD + having an empty GOT). + + ??? This hashtable can be replaced by an array indexed by bfd->id. */ + htab_t bfd2got; + + /* Next symndx to assign a global symbol. + h->got_entry_key is initialized from this counter. */ + unsigned long global_symndx; +}; + +/* m68k ELF linker hash table. */ + +struct elf_m68k_link_hash_table +{ + struct elf_link_hash_table root; + + /* Small local sym cache. */ + struct sym_cache sym_cache; + + /* The PLT format used by this link, or NULL if the format has not + yet been chosen. */ + const struct elf_m68k_plt_info *plt_info; + + /* True, if GP is loaded within each function which uses it. + Set to TRUE when GOT negative offsets or multi-GOT is enabled. */ + bfd_boolean local_gp_p; + + /* Switch controlling use of negative offsets to double the size of GOTs. */ + bfd_boolean use_neg_got_offsets_p; + + /* Switch controlling generation of multiple GOTs. */ + bfd_boolean allow_multigot_p; + + /* Multi-GOT data structure. */ + struct elf_m68k_multi_got multi_got_; +}; + +/* Get the m68k ELF linker hash table from a link_info structure. */ + +#define elf_m68k_hash_table(p) \ + (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ + == M68K_ELF_DATA ? ((struct elf_m68k_link_hash_table *) ((p)->hash)) : NULL) + +/* Shortcut to multi-GOT data. */ +#define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_) + +/* Create an entry in an m68k ELF linker hash table. */ + +static struct bfd_hash_entry * +elf_m68k_link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + struct bfd_hash_entry *ret = entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == NULL) + ret = bfd_hash_allocate (table, + sizeof (struct elf_m68k_link_hash_entry)); + if (ret == NULL) + return ret; + + /* Call the allocation method of the superclass. */ + ret = _bfd_elf_link_hash_newfunc (ret, table, string); + if (ret != NULL) + { + elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL; + elf_m68k_hash_entry (ret)->got_entry_key = 0; + elf_m68k_hash_entry (ret)->glist = NULL; + } + + return ret; +} + +/* Create an m68k ELF linker hash table. */ + +static struct bfd_link_hash_table * +elf_m68k_link_hash_table_create (bfd *abfd) +{ + struct elf_m68k_link_hash_table *ret; + bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table); + + ret = (struct elf_m68k_link_hash_table *) bfd_zmalloc (amt); + if (ret == (struct elf_m68k_link_hash_table *) NULL) + return NULL; + + if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, + elf_m68k_link_hash_newfunc, + sizeof (struct elf_m68k_link_hash_entry), + M68K_ELF_DATA)) + { + free (ret); + return NULL; + } + + ret->multi_got_.global_symndx = 1; + + return &ret->root.root; +} + +/* Destruct local data. */ + +static void +elf_m68k_link_hash_table_free (struct bfd_link_hash_table *_htab) +{ + struct elf_m68k_link_hash_table *htab; + + htab = (struct elf_m68k_link_hash_table *) _htab; + + if (htab->multi_got_.bfd2got != NULL) + { + htab_delete (htab->multi_got_.bfd2got); + htab->multi_got_.bfd2got = NULL; + } + _bfd_elf_link_hash_table_free (_htab); +} + +/* Set the right machine number. */ + +static bfd_boolean +elf32_m68k_object_p (bfd *abfd) +{ + unsigned int mach = 0; + unsigned features = 0; + flagword eflags = elf_elfheader (abfd)->e_flags; + + if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) + features |= m68000; + else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) + features |= cpu32; + else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) + features |= fido_a; + else + { + switch (eflags & EF_M68K_CF_ISA_MASK) + { + case EF_M68K_CF_ISA_A_NODIV: + features |= mcfisa_a; + break; + case EF_M68K_CF_ISA_A: + features |= mcfisa_a|mcfhwdiv; + break; + case EF_M68K_CF_ISA_A_PLUS: + features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp; + break; + case EF_M68K_CF_ISA_B_NOUSP: + features |= mcfisa_a|mcfisa_b|mcfhwdiv; + break; + case EF_M68K_CF_ISA_B: + features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp; + break; + case EF_M68K_CF_ISA_C: + features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp; + break; + case EF_M68K_CF_ISA_C_NODIV: + features |= mcfisa_a|mcfisa_c|mcfusp; + break; + } + switch (eflags & EF_M68K_CF_MAC_MASK) + { + case EF_M68K_CF_MAC: + features |= mcfmac; + break; + case EF_M68K_CF_EMAC: + features |= mcfemac; + break; + } + if (eflags & EF_M68K_CF_FLOAT) + features |= cfloat; + } + + mach = bfd_m68k_features_to_mach (features); + bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach); + + return TRUE; +} + +/* Somewhat reverse of elf32_m68k_object_p, this sets the e_flag + field based on the machine number. */ + +static void +elf_m68k_final_write_processing (bfd *abfd, + bfd_boolean linker ATTRIBUTE_UNUSED) +{ + int mach = bfd_get_mach (abfd); + unsigned long e_flags = elf_elfheader (abfd)->e_flags; + + if (!e_flags) + { + unsigned int arch_mask; + + arch_mask = bfd_m68k_mach_to_features (mach); + + if (arch_mask & m68000) + e_flags = EF_M68K_M68000; + else if (arch_mask & cpu32) + e_flags = EF_M68K_CPU32; + else if (arch_mask & fido_a) + e_flags = EF_M68K_FIDO; + else + { + switch (arch_mask + & (mcfisa_a | mcfisa_aa | mcfisa_b | mcfisa_c | mcfhwdiv | mcfusp)) + { + case mcfisa_a: + e_flags |= EF_M68K_CF_ISA_A_NODIV; + break; + case mcfisa_a | mcfhwdiv: + e_flags |= EF_M68K_CF_ISA_A; + break; + case mcfisa_a | mcfisa_aa | mcfhwdiv | mcfusp: + e_flags |= EF_M68K_CF_ISA_A_PLUS; + break; + case mcfisa_a | mcfisa_b | mcfhwdiv: + e_flags |= EF_M68K_CF_ISA_B_NOUSP; + break; + case mcfisa_a | mcfisa_b | mcfhwdiv | mcfusp: + e_flags |= EF_M68K_CF_ISA_B; + break; + case mcfisa_a | mcfisa_c | mcfhwdiv | mcfusp: + e_flags |= EF_M68K_CF_ISA_C; + break; + case mcfisa_a | mcfisa_c | mcfusp: + e_flags |= EF_M68K_CF_ISA_C_NODIV; + break; + } + if (arch_mask & mcfmac) + e_flags |= EF_M68K_CF_MAC; + else if (arch_mask & mcfemac) + e_flags |= EF_M68K_CF_EMAC; + if (arch_mask & cfloat) + e_flags |= EF_M68K_CF_FLOAT | EF_M68K_CFV4E; + } + elf_elfheader (abfd)->e_flags = e_flags; + } +} + +/* Keep m68k-specific flags in the ELF header. */ + +static bfd_boolean +elf32_m68k_set_private_flags (bfd *abfd, flagword flags) +{ + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = TRUE; + return TRUE; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ +static bfd_boolean +elf32_m68k_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + flagword out_flags; + flagword in_flags; + flagword out_isa; + flagword in_isa; + const bfd_arch_info_type *arch_info; + + if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return FALSE; + + /* Get the merged machine. This checks for incompatibility between + Coldfire & non-Coldfire flags, incompability between different + Coldfire ISAs, and incompability between different MAC types. */ + arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE); + if (!arch_info) + return FALSE; + + bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach); + + in_flags = elf_elfheader (ibfd)->e_flags; + if (!elf_flags_init (obfd)) + { + elf_flags_init (obfd) = TRUE; + out_flags = in_flags; + } + else + { + out_flags = elf_elfheader (obfd)->e_flags; + unsigned int variant_mask; + + if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) + variant_mask = 0; + else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) + variant_mask = 0; + else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) + variant_mask = 0; + else + variant_mask = EF_M68K_CF_ISA_MASK; + + in_isa = (in_flags & variant_mask); + out_isa = (out_flags & variant_mask); + if (in_isa > out_isa) + out_flags ^= in_isa ^ out_isa; + if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32 + && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) + || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO + && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)) + out_flags = EF_M68K_FIDO; + else + out_flags |= in_flags ^ in_isa; + } + elf_elfheader (obfd)->e_flags = out_flags; + + return TRUE; +} + +/* Display the flags field. */ + +static bfd_boolean +elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr) +{ + FILE *file = (FILE *) ptr; + flagword eflags = elf_elfheader (abfd)->e_flags; + + BFD_ASSERT (abfd != NULL && ptr != NULL); + + /* Print normal ELF private data. */ + _bfd_elf_print_private_bfd_data (abfd, ptr); + + /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ + + /* xgettext:c-format */ + fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); + + if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) + fprintf (file, " [m68000]"); + else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) + fprintf (file, " [cpu32]"); + else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) + fprintf (file, " [fido]"); + else + { + if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E) + fprintf (file, " [cfv4e]"); + + if (eflags & EF_M68K_CF_ISA_MASK) + { + char const *isa = _("unknown"); + char const *mac = _("unknown"); + char const *additional = ""; + + switch (eflags & EF_M68K_CF_ISA_MASK) + { + case EF_M68K_CF_ISA_A_NODIV: + isa = "A"; + additional = " [nodiv]"; + break; + case EF_M68K_CF_ISA_A: + isa = "A"; + break; + case EF_M68K_CF_ISA_A_PLUS: + isa = "A+"; + break; + case EF_M68K_CF_ISA_B_NOUSP: + isa = "B"; + additional = " [nousp]"; + break; + case EF_M68K_CF_ISA_B: + isa = "B"; + break; + case EF_M68K_CF_ISA_C: + isa = "C"; + break; + case EF_M68K_CF_ISA_C_NODIV: + isa = "C"; + additional = " [nodiv]"; + break; + } + fprintf (file, " [isa %s]%s", isa, additional); + + if (eflags & EF_M68K_CF_FLOAT) + fprintf (file, " [float]"); + + switch (eflags & EF_M68K_CF_MAC_MASK) + { + case 0: + mac = NULL; + break; + case EF_M68K_CF_MAC: + mac = "mac"; + break; + case EF_M68K_CF_EMAC: + mac = "emac"; + break; + case EF_M68K_CF_EMAC_B: + mac = "emac_b"; + break; + } + if (mac) + fprintf (file, " [%s]", mac); + } + } + + fputc ('\n', file); + + return TRUE; +} + +/* Multi-GOT support implementation design: + + Multi-GOT starts in check_relocs hook. There we scan all + relocations of a BFD and build a local GOT (struct elf_m68k_got) + for it. If a single BFD appears to require too many GOT slots with + R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification + to user. + After check_relocs has been invoked for each input BFD, we have + constructed a GOT for each input BFD. + + To minimize total number of GOTs required for a particular output BFD + (as some environments support only 1 GOT per output object) we try + to merge some of the GOTs to share an offset space. Ideally [and in most + cases] we end up with a single GOT. In cases when there are too many + restricted relocations (e.g., R_68K_GOT16O relocations) we end up with + several GOTs, assuming the environment can handle them. + + Partitioning is done in elf_m68k_partition_multi_got. We start with + an empty GOT and traverse bfd2got hashtable putting got_entries from + local GOTs to the new 'big' one. We do that by constructing an + intermediate GOT holding all the entries the local GOT has and the big + GOT lacks. Then we check if there is room in the big GOT to accomodate + all the entries from diff. On success we add those entries to the big + GOT; on failure we start the new 'big' GOT and retry the adding of + entries from the local GOT. Note that this retry will always succeed as + each local GOT doesn't overflow the limits. After partitioning we + end up with each bfd assigned one of the big GOTs. GOT entries in the + big GOTs are initialized with GOT offsets. Note that big GOTs are + positioned consequently in program space and represent a single huge GOT + to the outside world. + + After that we get to elf_m68k_relocate_section. There we + adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol + relocations to refer to appropriate [assigned to current input_bfd] + big GOT. + + Notes: + + GOT entry type: We have several types of GOT entries. + * R_8 type is used in entries for symbols that have at least one + R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40 + such entries in one GOT. + * R_16 type is used in entries for symbols that have at least one + R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations. + We can have at most 0x4000 such entries in one GOT. + * R_32 type is used in all other cases. We can have as many + such entries in one GOT as we'd like. + When counting relocations we have to include the count of the smaller + ranged relocations in the counts of the larger ranged ones in order + to correctly detect overflow. + + Sorting the GOT: In each GOT starting offsets are assigned to + R_8 entries, which are followed by R_16 entries, and + R_32 entries go at the end. See finalize_got_offsets for details. + + Negative GOT offsets: To double usable offset range of GOTs we use + negative offsets. As we assign entries with GOT offsets relative to + start of .got section, the offset values are positive. They become + negative only in relocate_section where got->offset value is + subtracted from them. + + 3 special GOT entries: There are 3 special GOT entries used internally + by loader. These entries happen to be placed to .got.plt section, + so we don't do anything about them in multi-GOT support. + + Memory management: All data except for hashtables + multi_got->bfd2got and got->entries are allocated on + elf_hash_table (info)->dynobj bfd (for this reason we pass 'info' + to most functions), so we don't need to care to free them. At the + moment of allocation hashtables are being linked into main data + structure (multi_got), all pieces of which are reachable from + elf_m68k_multi_got (info). We deallocate them in + elf_m68k_link_hash_table_free. */ + +/* Initialize GOT. */ + +static void +elf_m68k_init_got (struct elf_m68k_got *got) +{ + got->entries = NULL; + got->n_slots[R_8] = 0; + got->n_slots[R_16] = 0; + got->n_slots[R_32] = 0; + got->local_n_slots = 0; + got->offset = (bfd_vma) -1; +} + +/* Destruct GOT. */ + +static void +elf_m68k_clear_got (struct elf_m68k_got *got) +{ + if (got->entries != NULL) + { + htab_delete (got->entries); + got->entries = NULL; + } +} + +/* Create and empty GOT structure. INFO is the context where memory + should be allocated. */ + +static struct elf_m68k_got * +elf_m68k_create_empty_got (struct bfd_link_info *info) +{ + struct elf_m68k_got *got; + + got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got)); + if (got == NULL) + return NULL; + + elf_m68k_init_got (got); + + return got; +} + +/* Initialize KEY. */ + +static void +elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key, + struct elf_link_hash_entry *h, + const bfd *abfd, unsigned long symndx, + enum elf_m68k_reloc_type reloc_type) +{ + if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32) + /* All TLS_LDM relocations share a single GOT entry. */ + { + key->bfd = NULL; + key->symndx = 0; + } + else if (h != NULL) + /* Global symbols are identified with their got_entry_key. */ + { + key->bfd = NULL; + key->symndx = elf_m68k_hash_entry (h)->got_entry_key; + BFD_ASSERT (key->symndx != 0); + } + else + /* Local symbols are identified by BFD they appear in and symndx. */ + { + key->bfd = abfd; + key->symndx = symndx; + } + + key->type = reloc_type; +} + +/* Calculate hash of got_entry. + ??? Is it good? */ + +static hashval_t +elf_m68k_got_entry_hash (const void *_entry) +{ + const struct elf_m68k_got_entry_key *key; + + key = &((const struct elf_m68k_got_entry *) _entry)->key_; + + return (key->symndx + + (key->bfd != NULL ? (int) key->bfd->id : -1) + + elf_m68k_reloc_got_type (key->type)); +} + +/* Check if two got entries are equal. */ + +static int +elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2) +{ + const struct elf_m68k_got_entry_key *key1; + const struct elf_m68k_got_entry_key *key2; + + key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_; + key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_; + + return (key1->bfd == key2->bfd + && key1->symndx == key2->symndx + && (elf_m68k_reloc_got_type (key1->type) + == elf_m68k_reloc_got_type (key2->type))); +} + +/* When using negative offsets, we allocate one extra R_8, one extra R_16 + and one extra R_32 slots to simplify handling of 2-slot entries during + offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */ + +/* Maximal number of R_8 slots in a single GOT. */ +#define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \ + (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \ + ? (0x40 - 1) \ + : 0x20) + +/* Maximal number of R_8 and R_16 slots in a single GOT. */ +#define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \ + (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \ + ? (0x4000 - 2) \ + : 0x2000) + +/* SEARCH - simply search the hashtable, don't insert new entries or fail when + the entry cannot be found. + FIND_OR_CREATE - search for an existing entry, but create new if there's + no such. + MUST_FIND - search for an existing entry and assert that it exist. + MUST_CREATE - assert that there's no such entry and create new one. */ +enum elf_m68k_get_entry_howto + { + SEARCH, + FIND_OR_CREATE, + MUST_FIND, + MUST_CREATE + }; + +/* Get or create (depending on HOWTO) entry with KEY in GOT. + INFO is context in which memory should be allocated (can be NULL if + HOWTO is SEARCH or MUST_FIND). */ + +static struct elf_m68k_got_entry * +elf_m68k_get_got_entry (struct elf_m68k_got *got, + const struct elf_m68k_got_entry_key *key, + enum elf_m68k_get_entry_howto howto, + struct bfd_link_info *info) +{ + struct elf_m68k_got_entry entry_; + struct elf_m68k_got_entry *entry; + void **ptr; + + BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND)); + + if (got->entries == NULL) + /* This is the first entry in ABFD. Initialize hashtable. */ + { + if (howto == SEARCH) + return NULL; + + got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT + (info), + elf_m68k_got_entry_hash, + elf_m68k_got_entry_eq, NULL); + if (got->entries == NULL) + { + bfd_set_error (bfd_error_no_memory); + return NULL; + } + } + + entry_.key_ = *key; + ptr = htab_find_slot (got->entries, &entry_, (howto != SEARCH + ? INSERT : NO_INSERT)); + if (ptr == NULL) + { + if (howto == SEARCH) + /* Entry not found. */ + return NULL; + + /* We're out of memory. */ + bfd_set_error (bfd_error_no_memory); + return NULL; + } + + if (*ptr == NULL) + /* We didn't find the entry and we're asked to create a new one. */ + { + BFD_ASSERT (howto != MUST_FIND && howto != SEARCH); + + entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)); + if (entry == NULL) + return NULL; + + /* Initialize new entry. */ + entry->key_ = *key; + + entry->u.s1.refcount = 0; + + /* Mark the entry as not initialized. */ + entry->key_.type = R_68K_max; + + *ptr = entry; + } + else + /* We found the entry. */ + { + BFD_ASSERT (howto != MUST_CREATE); + + entry = *ptr; + } + + return entry; +} + +/* Update GOT counters when merging entry of WAS type with entry of NEW type. + Return the value to which ENTRY's type should be set. */ + +static enum elf_m68k_reloc_type +elf_m68k_update_got_entry_type (struct elf_m68k_got *got, + enum elf_m68k_reloc_type was, + enum elf_m68k_reloc_type new_reloc) +{ + enum elf_m68k_got_offset_size was_size; + enum elf_m68k_got_offset_size new_size; + bfd_vma n_slots; + + if (was == R_68K_max) + /* The type of the entry is not initialized yet. */ + { + /* Update all got->n_slots counters, including n_slots[R_32]. */ + was_size = R_LAST; + + was = new_reloc; + } + else + { + /* !!! We, probably, should emit an error rather then fail on assert + in such a case. */ + BFD_ASSERT (elf_m68k_reloc_got_type (was) + == elf_m68k_reloc_got_type (new_reloc)); + + was_size = elf_m68k_reloc_got_offset_size (was); + } + + new_size = elf_m68k_reloc_got_offset_size (new_reloc); + n_slots = elf_m68k_reloc_got_n_slots (new_reloc); + + while (was_size > new_size) + { + --was_size; + got->n_slots[was_size] += n_slots; + } + + if (new_reloc > was) + /* Relocations are ordered from bigger got offset size to lesser, + so choose the relocation type with lesser offset size. */ + was = new_reloc; + + return was; +} + +/* Update GOT counters when removing an entry of type TYPE. */ + +static void +elf_m68k_remove_got_entry_type (struct elf_m68k_got *got, + enum elf_m68k_reloc_type type) +{ + enum elf_m68k_got_offset_size os; + bfd_vma n_slots; + + n_slots = elf_m68k_reloc_got_n_slots (type); + + /* Decrese counter of slots with offset size corresponding to TYPE + and all greater offset sizes. */ + for (os = elf_m68k_reloc_got_offset_size (type); os <= R_32; ++os) + { + BFD_ASSERT (got->n_slots[os] >= n_slots); + + got->n_slots[os] -= n_slots; + } +} + +/* Add new or update existing entry to GOT. + H, ABFD, TYPE and SYMNDX is data for the entry. + INFO is a context where memory should be allocated. */ + +static struct elf_m68k_got_entry * +elf_m68k_add_entry_to_got (struct elf_m68k_got *got, + struct elf_link_hash_entry *h, + const bfd *abfd, + enum elf_m68k_reloc_type reloc_type, + unsigned long symndx, + struct bfd_link_info *info) +{ + struct elf_m68k_got_entry_key key_; + struct elf_m68k_got_entry *entry; + + if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0) + elf_m68k_hash_entry (h)->got_entry_key + = elf_m68k_multi_got (info)->global_symndx++; + + elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type); + + entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info); + if (entry == NULL) + return NULL; + + /* Determine entry's type and update got->n_slots counters. */ + entry->key_.type = elf_m68k_update_got_entry_type (got, + entry->key_.type, + reloc_type); + + /* Update refcount. */ + ++entry->u.s1.refcount; + + if (entry->u.s1.refcount == 1) + /* We see this entry for the first time. */ + { + if (entry->key_.bfd != NULL) + got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type); + } + + BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots); + + if ((got->n_slots[R_8] + > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) + || (got->n_slots[R_16] + > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))) + /* This BFD has too many relocation. */ + { + if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) + (*_bfd_error_handler) (_("%B: GOT overflow: " + "Number of relocations with 8-bit " + "offset > %d"), + abfd, + ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)); + else + (*_bfd_error_handler) (_("%B: GOT overflow: " + "Number of relocations with 8- or 16-bit " + "offset > %d"), + abfd, + ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)); + + return NULL; + } + + return entry; +} + +/* Compute the hash value of the bfd in a bfd2got hash entry. */ + +static hashval_t +elf_m68k_bfd2got_entry_hash (const void *entry) +{ + const struct elf_m68k_bfd2got_entry *e; + + e = (const struct elf_m68k_bfd2got_entry *) entry; + + return e->bfd->id; +} + +/* Check whether two hash entries have the same bfd. */ + +static int +elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2) +{ + const struct elf_m68k_bfd2got_entry *e1; + const struct elf_m68k_bfd2got_entry *e2; + + e1 = (const struct elf_m68k_bfd2got_entry *) entry1; + e2 = (const struct elf_m68k_bfd2got_entry *) entry2; + + return e1->bfd == e2->bfd; +} + +/* Destruct a bfd2got entry. */ + +static void +elf_m68k_bfd2got_entry_del (void *_entry) +{ + struct elf_m68k_bfd2got_entry *entry; + + entry = (struct elf_m68k_bfd2got_entry *) _entry; + + BFD_ASSERT (entry->got != NULL); + elf_m68k_clear_got (entry->got); +} + +/* Find existing or create new (depending on HOWTO) bfd2got entry in + MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where + memory should be allocated. */ + +static struct elf_m68k_bfd2got_entry * +elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got, + const bfd *abfd, + enum elf_m68k_get_entry_howto howto, + struct bfd_link_info *info) +{ + struct elf_m68k_bfd2got_entry entry_; + void **ptr; + struct elf_m68k_bfd2got_entry *entry; + + BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND)); + + if (multi_got->bfd2got == NULL) + /* This is the first GOT. Initialize bfd2got. */ + { + if (howto == SEARCH) + return NULL; + + multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash, + elf_m68k_bfd2got_entry_eq, + elf_m68k_bfd2got_entry_del); + if (multi_got->bfd2got == NULL) + { + bfd_set_error (bfd_error_no_memory); + return NULL; + } + } + + entry_.bfd = abfd; + ptr = htab_find_slot (multi_got->bfd2got, &entry_, (howto != SEARCH + ? INSERT : NO_INSERT)); + if (ptr == NULL) + { + if (howto == SEARCH) + /* Entry not found. */ + return NULL; + + /* We're out of memory. */ + bfd_set_error (bfd_error_no_memory); + return NULL; + } + + if (*ptr == NULL) + /* Entry was not found. Create new one. */ + { + BFD_ASSERT (howto != MUST_FIND && howto != SEARCH); + + entry = ((struct elf_m68k_bfd2got_entry *) + bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry))); + if (entry == NULL) + return NULL; + + entry->bfd = abfd; + + entry->got = elf_m68k_create_empty_got (info); + if (entry->got == NULL) + return NULL; + + *ptr = entry; + } + else + { + BFD_ASSERT (howto != MUST_CREATE); + + /* Return existing entry. */ + entry = *ptr; + } + + return entry; +} + +struct elf_m68k_can_merge_gots_arg +{ + /* A current_got that we constructing a DIFF against. */ + struct elf_m68k_got *big; + + /* GOT holding entries not present or that should be changed in + BIG. */ + struct elf_m68k_got *diff; + + /* Context where to allocate memory. */ + struct bfd_link_info *info; + + /* Error flag. */ + bfd_boolean error_p; +}; + +/* Process a single entry from the small GOT to see if it should be added + or updated in the big GOT. */ + +static int +elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg) +{ + const struct elf_m68k_got_entry *entry1; + struct elf_m68k_can_merge_gots_arg *arg; + const struct elf_m68k_got_entry *entry2; + enum elf_m68k_reloc_type type; + + entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr; + arg = (struct elf_m68k_can_merge_gots_arg *) _arg; + + entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL); + + if (entry2 != NULL) + /* We found an existing entry. Check if we should update it. */ + { + type = elf_m68k_update_got_entry_type (arg->diff, + entry2->key_.type, + entry1->key_.type); + + if (type == entry2->key_.type) + /* ENTRY1 doesn't update data in ENTRY2. Skip it. + To skip creation of difference entry we use the type, + which we won't see in GOT entries for sure. */ + type = R_68K_max; + } + else + /* We didn't find the entry. Add entry1 to DIFF. */ + { + BFD_ASSERT (entry1->key_.type != R_68K_max); + + type = elf_m68k_update_got_entry_type (arg->diff, + R_68K_max, entry1->key_.type); + + if (entry1->key_.bfd != NULL) + arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type); + } + + if (type != R_68K_max) + /* Create an entry in DIFF. */ + { + struct elf_m68k_got_entry *entry; + + entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE, + arg->info); + if (entry == NULL) + { + arg->error_p = TRUE; + return 0; + } + + entry->key_.type = type; + } + + return 1; +} + +/* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it. + Construct DIFF GOT holding the entries which should be added or updated + in BIG GOT to accumulate information from SMALL. + INFO is the context where memory should be allocated. */ + +static bfd_boolean +elf_m68k_can_merge_gots (struct elf_m68k_got *big, + const struct elf_m68k_got *small, + struct bfd_link_info *info, + struct elf_m68k_got *diff) +{ + struct elf_m68k_can_merge_gots_arg arg_; + + BFD_ASSERT (small->offset == (bfd_vma) -1); + + arg_.big = big; + arg_.diff = diff; + arg_.info = info; + arg_.error_p = FALSE; + htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_); + if (arg_.error_p) + { + diff->offset = 0; + return FALSE; + } + + /* Check for overflow. */ + if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8] + > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) + || (big->n_slots[R_16] + arg_.diff->n_slots[R_16] + > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))) + return FALSE; + + return TRUE; +} + +struct elf_m68k_merge_gots_arg +{ + /* The BIG got. */ + struct elf_m68k_got *big; + + /* Context where memory should be allocated. */ + struct bfd_link_info *info; + + /* Error flag. */ + bfd_boolean error_p; +}; + +/* Process a single entry from DIFF got. Add or update corresponding + entry in the BIG got. */ + +static int +elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg) +{ + const struct elf_m68k_got_entry *from; + struct elf_m68k_merge_gots_arg *arg; + struct elf_m68k_got_entry *to; + + from = (const struct elf_m68k_got_entry *) *entry_ptr; + arg = (struct elf_m68k_merge_gots_arg *) _arg; + + to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE, + arg->info); + if (to == NULL) + { + arg->error_p = TRUE; + return 0; + } + + BFD_ASSERT (to->u.s1.refcount == 0); + /* All we need to merge is TYPE. */ + to->key_.type = from->key_.type; + + return 1; +} + +/* Merge data from DIFF to BIG. INFO is context where memory should be + allocated. */ + +static bfd_boolean +elf_m68k_merge_gots (struct elf_m68k_got *big, + struct elf_m68k_got *diff, + struct bfd_link_info *info) +{ + if (diff->entries != NULL) + /* DIFF is not empty. Merge it into BIG GOT. */ + { + struct elf_m68k_merge_gots_arg arg_; + + /* Merge entries. */ + arg_.big = big; + arg_.info = info; + arg_.error_p = FALSE; + htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_); + if (arg_.error_p) + return FALSE; + + /* Merge counters. */ + big->n_slots[R_8] += diff->n_slots[R_8]; + big->n_slots[R_16] += diff->n_slots[R_16]; + big->n_slots[R_32] += diff->n_slots[R_32]; + big->local_n_slots += diff->local_n_slots; + } + else + /* DIFF is empty. */ + { + BFD_ASSERT (diff->n_slots[R_8] == 0); + BFD_ASSERT (diff->n_slots[R_16] == 0); + BFD_ASSERT (diff->n_slots[R_32] == 0); + BFD_ASSERT (diff->local_n_slots == 0); + } + + BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p + || ((big->n_slots[R_8] + <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) + && (big->n_slots[R_16] + <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))); + + return TRUE; +} + +struct elf_m68k_finalize_got_offsets_arg +{ + /* Ranges of the offsets for GOT entries. + R_x entries receive offsets between offset1[R_x] and offset2[R_x]. + R_x is R_8, R_16 and R_32. */ + bfd_vma *offset1; + bfd_vma *offset2; + + /* Mapping from global symndx to global symbols. + This is used to build lists of got entries for global symbols. */ + struct elf_m68k_link_hash_entry **symndx2h; + + bfd_vma n_ldm_entries; +}; + +/* Assign ENTRY an offset. Build list of GOT entries for global symbols + along the way. */ + +static int +elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg) +{ + struct elf_m68k_got_entry *entry; + struct elf_m68k_finalize_got_offsets_arg *arg; + + enum elf_m68k_got_offset_size got_offset_size; + bfd_vma entry_size; + + entry = (struct elf_m68k_got_entry *) *entry_ptr; + arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg; + + /* This should be a fresh entry created in elf_m68k_can_merge_gots. */ + BFD_ASSERT (entry->u.s1.refcount == 0); + + /* Get GOT offset size for the entry . */ + got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type); + + /* Calculate entry size in bytes. */ + entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type); + + /* Check if we should switch to negative range of the offsets. */ + if (arg->offset1[got_offset_size] + entry_size + > arg->offset2[got_offset_size]) + { + /* Verify that this is the only switch to negative range for + got_offset_size. If this assertion fails, then we've miscalculated + range for got_offset_size entries in + elf_m68k_finalize_got_offsets. */ + BFD_ASSERT (arg->offset2[got_offset_size] + != arg->offset2[-(int) got_offset_size - 1]); + + /* Switch. */ + arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1]; + arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1]; + + /* Verify that now we have enough room for the entry. */ + BFD_ASSERT (arg->offset1[got_offset_size] + entry_size + <= arg->offset2[got_offset_size]); + } + + /* Assign offset to entry. */ + entry->u.s2.offset = arg->offset1[got_offset_size]; + arg->offset1[got_offset_size] += entry_size; + + if (entry->key_.bfd == NULL) + /* Hook up this entry into the list of got_entries of H. */ + { + struct elf_m68k_link_hash_entry *h; + + h = arg->symndx2h[entry->key_.symndx]; + if (h != NULL) + { + entry->u.s2.next = h->glist; + h->glist = entry; + } + else + /* This should be the entry for TLS_LDM relocation then. */ + { + BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type) + == R_68K_TLS_LDM32) + && entry->key_.symndx == 0); + + ++arg->n_ldm_entries; + } + } + else + /* This entry is for local symbol. */ + entry->u.s2.next = NULL; + + return 1; +} + +/* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we + should use negative offsets. + Build list of GOT entries for global symbols along the way. + SYMNDX2H is mapping from global symbol indices to actual + global symbols. + Return offset at which next GOT should start. */ + +static void +elf_m68k_finalize_got_offsets (struct elf_m68k_got *got, + bfd_boolean use_neg_got_offsets_p, + struct elf_m68k_link_hash_entry **symndx2h, + bfd_vma *final_offset, bfd_vma *n_ldm_entries) +{ + struct elf_m68k_finalize_got_offsets_arg arg_; + bfd_vma offset1_[2 * R_LAST]; + bfd_vma offset2_[2 * R_LAST]; + int i; + bfd_vma start_offset; + + BFD_ASSERT (got->offset != (bfd_vma) -1); + + /* We set entry offsets relative to the .got section (and not the + start of a particular GOT), so that we can use them in + finish_dynamic_symbol without needing to know the GOT which they come + from. */ + + /* Put offset1 in the middle of offset1_, same for offset2. */ + arg_.offset1 = offset1_ + R_LAST; + arg_.offset2 = offset2_ + R_LAST; + + start_offset = got->offset; + + if (use_neg_got_offsets_p) + /* Setup both negative and positive ranges for R_8, R_16 and R_32. */ + i = -(int) R_32 - 1; + else + /* Setup positives ranges for R_8, R_16 and R_32. */ + i = (int) R_8; + + for (; i <= (int) R_32; ++i) + { + int j; + size_t n; + + /* Set beginning of the range of offsets I. */ + arg_.offset1[i] = start_offset; + + /* Calculate number of slots that require I offsets. */ + j = (i >= 0) ? i : -i - 1; + n = (j >= 1) ? got->n_slots[j - 1] : 0; + n = got->n_slots[j] - n; + + if (use_neg_got_offsets_p && n != 0) + { + if (i < 0) + /* We first fill the positive side of the range, so we might + end up with one empty slot at that side when we can't fit + whole 2-slot entry. Account for that at negative side of + the interval with one additional entry. */ + n = n / 2 + 1; + else + /* When the number of slots is odd, make positive side of the + range one entry bigger. */ + n = (n + 1) / 2; + } + + /* N is the number of slots that require I offsets. + Calculate length of the range for I offsets. */ + n = 4 * n; + + /* Set end of the range. */ + arg_.offset2[i] = start_offset + n; + + start_offset = arg_.offset2[i]; + } + + if (!use_neg_got_offsets_p) + /* Make sure that if we try to switch to negative offsets in + elf_m68k_finalize_got_offsets_1, the assert therein will catch + the bug. */ + for (i = R_8; i <= R_32; ++i) + arg_.offset2[-i - 1] = arg_.offset2[i]; + + /* Setup got->offset. offset1[R_8] is either in the middle or at the + beginning of GOT depending on use_neg_got_offsets_p. */ + got->offset = arg_.offset1[R_8]; + + arg_.symndx2h = symndx2h; + arg_.n_ldm_entries = 0; + + /* Assign offsets. */ + htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_); + + /* Check offset ranges we have actually assigned. */ + for (i = (int) R_8; i <= (int) R_32; ++i) + BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4); + + *final_offset = start_offset; + *n_ldm_entries = arg_.n_ldm_entries; +} + +struct elf_m68k_partition_multi_got_arg +{ + /* The GOT we are adding entries to. Aka big got. */ + struct elf_m68k_got *current_got; + + /* Offset to assign the next CURRENT_GOT. */ + bfd_vma offset; + + /* Context where memory should be allocated. */ + struct bfd_link_info *info; + + /* Total number of slots in the .got section. + This is used to calculate size of the .got and .rela.got sections. */ + bfd_vma n_slots; + + /* Difference in numbers of allocated slots in the .got section + and necessary relocations in the .rela.got section. + This is used to calculate size of the .rela.got section. */ + bfd_vma slots_relas_diff; + + /* Error flag. */ + bfd_boolean error_p; + + /* Mapping from global symndx to global symbols. + This is used to build lists of got entries for global symbols. */ + struct elf_m68k_link_hash_entry **symndx2h; +}; + +static void +elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg) +{ + bfd_vma n_ldm_entries; + + elf_m68k_finalize_got_offsets (arg->current_got, + (elf_m68k_hash_table (arg->info) + ->use_neg_got_offsets_p), + arg->symndx2h, + &arg->offset, &n_ldm_entries); + + arg->n_slots += arg->current_got->n_slots[R_32]; + + if (!arg->info->shared) + /* If we are generating a shared object, we need to + output a R_68K_RELATIVE reloc so that the dynamic + linker can adjust this GOT entry. Overwise we + don't need space in .rela.got for local symbols. */ + arg->slots_relas_diff += arg->current_got->local_n_slots; + + /* @LDM relocations require a 2-slot GOT entry, but only + one relocation. Account for that. */ + arg->slots_relas_diff += n_ldm_entries; + + BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots); +} + + +/* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT + or start a new CURRENT_GOT. */ + +static int +elf_m68k_partition_multi_got_1 (void **_entry, void *_arg) +{ + struct elf_m68k_bfd2got_entry *entry; + struct elf_m68k_partition_multi_got_arg *arg; + struct elf_m68k_got *got; + struct elf_m68k_got diff_; + struct elf_m68k_got *diff; + + entry = (struct elf_m68k_bfd2got_entry *) *_entry; + arg = (struct elf_m68k_partition_multi_got_arg *) _arg; + + got = entry->got; + BFD_ASSERT (got != NULL); + BFD_ASSERT (got->offset == (bfd_vma) -1); + + diff = NULL; + + if (arg->current_got != NULL) + /* Construct diff. */ + { + diff = &diff_; + elf_m68k_init_got (diff); + + if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff)) + { + if (diff->offset == 0) + /* Offset set to 0 in the diff_ indicates an error. */ + { + arg->error_p = TRUE; + goto final_return; + } + + if (elf_m68k_hash_table (arg->info)->allow_multigot_p) + { + elf_m68k_clear_got (diff); + /* Schedule to finish up current_got and start new one. */ + diff = NULL; + } + /* else + Merge GOTs no matter what. If big GOT overflows, + we'll fail in relocate_section due to truncated relocations. + + ??? May be fail earlier? E.g., in can_merge_gots. */ + } + } + else + /* Diff of got against empty current_got is got itself. */ + { + /* Create empty current_got to put subsequent GOTs to. */ + arg->current_got = elf_m68k_create_empty_got (arg->info); + if (arg->current_got == NULL) + { + arg->error_p = TRUE; + goto final_return; + } + + arg->current_got->offset = arg->offset; + + diff = got; + } + + if (diff != NULL) + { + if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info)) + { + arg->error_p = TRUE; + goto final_return; + } + + /* Now we can free GOT. */ + elf_m68k_clear_got (got); + + entry->got = arg->current_got; + } + else + { + /* Finish up current_got. */ + elf_m68k_partition_multi_got_2 (arg); + + /* Schedule to start a new current_got. */ + arg->current_got = NULL; + + /* Retry. */ + if (!elf_m68k_partition_multi_got_1 (_entry, _arg)) + { + BFD_ASSERT (arg->error_p); + goto final_return; + } + } + + final_return: + if (diff != NULL) + elf_m68k_clear_got (diff); + + return arg->error_p == FALSE ? 1 : 0; +} + +/* Helper function to build symndx2h mapping. */ + +static bfd_boolean +elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h, + void *_arg) +{ + struct elf_m68k_link_hash_entry *h; + + h = elf_m68k_hash_entry (_h); + + if (h->got_entry_key != 0) + /* H has at least one entry in the GOT. */ + { + struct elf_m68k_partition_multi_got_arg *arg; + + arg = (struct elf_m68k_partition_multi_got_arg *) _arg; + + BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL); + arg->symndx2h[h->got_entry_key] = h; + } + + return TRUE; +} + +/* Merge GOTs of some BFDs, assign offsets to GOT entries and build + lists of GOT entries for global symbols. + Calculate sizes of .got and .rela.got sections. */ + +static bfd_boolean +elf_m68k_partition_multi_got (struct bfd_link_info *info) +{ + struct elf_m68k_multi_got *multi_got; + struct elf_m68k_partition_multi_got_arg arg_; + + multi_got = elf_m68k_multi_got (info); + + arg_.current_got = NULL; + arg_.offset = 0; + arg_.info = info; + arg_.n_slots = 0; + arg_.slots_relas_diff = 0; + arg_.error_p = FALSE; + + if (multi_got->bfd2got != NULL) + { + /* Initialize symndx2h mapping. */ + { + arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx + * sizeof (*arg_.symndx2h)); + if (arg_.symndx2h == NULL) + return FALSE; + + elf_link_hash_traverse (elf_hash_table (info), + elf_m68k_init_symndx2h_1, &arg_); + } + + /* Partition. */ + htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1, + &arg_); + if (arg_.error_p) + { + free (arg_.symndx2h); + arg_.symndx2h = NULL; + + return FALSE; + } + + /* Finish up last current_got. */ + elf_m68k_partition_multi_got_2 (&arg_); + + free (arg_.symndx2h); + } + + if (elf_hash_table (info)->dynobj != NULL) + /* Set sizes of .got and .rela.got sections. */ + { + asection *s; + + s = bfd_get_linker_section (elf_hash_table (info)->dynobj, ".got"); + if (s != NULL) + s->size = arg_.offset; + else + BFD_ASSERT (arg_.offset == 0); + + BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots); + arg_.n_slots -= arg_.slots_relas_diff; + + s = bfd_get_linker_section (elf_hash_table (info)->dynobj, ".rela.got"); + if (s != NULL) + s->size = arg_.n_slots * sizeof (Elf32_External_Rela); + else + BFD_ASSERT (arg_.n_slots == 0); + } + else + BFD_ASSERT (multi_got->bfd2got == NULL); + + return TRUE; +} + +/* Specialized version of elf_m68k_get_got_entry that returns pointer + to hashtable slot, thus allowing removal of entry via + elf_m68k_remove_got_entry. */ + +static struct elf_m68k_got_entry ** +elf_m68k_find_got_entry_ptr (struct elf_m68k_got *got, + struct elf_m68k_got_entry_key *key) +{ + void **ptr; + struct elf_m68k_got_entry entry_; + struct elf_m68k_got_entry **entry_ptr; + + entry_.key_ = *key; + ptr = htab_find_slot (got->entries, &entry_, NO_INSERT); + BFD_ASSERT (ptr != NULL); + + entry_ptr = (struct elf_m68k_got_entry **) ptr; + + return entry_ptr; +} + +/* Remove entry pointed to by ENTRY_PTR from GOT. */ + +static void +elf_m68k_remove_got_entry (struct elf_m68k_got *got, + struct elf_m68k_got_entry **entry_ptr) +{ + struct elf_m68k_got_entry *entry; + + entry = *entry_ptr; + + /* Check that offsets have not been finalized yet. */ + BFD_ASSERT (got->offset == (bfd_vma) -1); + /* Check that this entry is indeed unused. */ + BFD_ASSERT (entry->u.s1.refcount == 0); + + elf_m68k_remove_got_entry_type (got, entry->key_.type); + + if (entry->key_.bfd != NULL) + got->local_n_slots -= elf_m68k_reloc_got_n_slots (entry->key_.type); + + BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots); + + htab_clear_slot (got->entries, (void **) entry_ptr); +} + +/* Copy any information related to dynamic linking from a pre-existing + symbol to a newly created symbol. Also called to copy flags and + other back-end info to a weakdef, in which case the symbol is not + newly created and plt/got refcounts and dynamic indices should not + be copied. */ + +static void +elf_m68k_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *_dir, + struct elf_link_hash_entry *_ind) +{ + struct elf_m68k_link_hash_entry *dir; + struct elf_m68k_link_hash_entry *ind; + + _bfd_elf_link_hash_copy_indirect (info, _dir, _ind); + + if (_ind->root.type != bfd_link_hash_indirect) + return; + + dir = elf_m68k_hash_entry (_dir); + ind = elf_m68k_hash_entry (_ind); + + /* Any absolute non-dynamic relocations against an indirect or weak + definition will be against the target symbol. */ + _dir->non_got_ref |= _ind->non_got_ref; + + /* We might have a direct symbol already having entries in the GOTs. + Update its key only in case indirect symbol has GOT entries and + assert that both indirect and direct symbols don't have GOT entries + at the same time. */ + if (ind->got_entry_key != 0) + { + BFD_ASSERT (dir->got_entry_key == 0); + /* Assert that GOTs aren't partioned yet. */ + BFD_ASSERT (ind->glist == NULL); + + dir->got_entry_key = ind->got_entry_key; + ind->got_entry_key = 0; + } +} + +/* Look through the relocs for a section during the first phase, and + allocate space in the global offset table or procedure linkage + table. */ + +static bfd_boolean +elf_m68k_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; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + asection *sgot; + asection *srelgot; + asection *sreloc; + struct elf_m68k_got *got; + + if (info->relocatable) + return TRUE; + + dynobj = elf_hash_table (info)->dynobj; + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + + sgot = NULL; + srelgot = NULL; + sreloc = NULL; + + got = NULL; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h; + + 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; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_68K_GOT8: + case R_68K_GOT16: + case R_68K_GOT32: + if (h != NULL + && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + /* Fall through. */ + + /* Relative GOT relocations. */ + case R_68K_GOT8O: + case R_68K_GOT16O: + case R_68K_GOT32O: + /* Fall through. */ + + /* TLS relocations. */ + case R_68K_TLS_GD8: + case R_68K_TLS_GD16: + case R_68K_TLS_GD32: + case R_68K_TLS_LDM8: + case R_68K_TLS_LDM16: + case R_68K_TLS_LDM32: + case R_68K_TLS_IE8: + case R_68K_TLS_IE16: + case R_68K_TLS_IE32: + + case R_68K_TLS_TPREL32: + case R_68K_TLS_DTPREL32: + + if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32 + && info->shared) + /* Do the special chorus for libraries with static TLS. */ + info->flags |= DF_STATIC_TLS; + + /* This symbol requires a global offset table entry. */ + + if (dynobj == NULL) + { + /* Create the .got section. */ + elf_hash_table (info)->dynobj = dynobj = abfd; + if (!_bfd_elf_create_got_section (dynobj, info)) + return FALSE; + } + + if (sgot == NULL) + { + sgot = bfd_get_linker_section (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + } + + if (srelgot == NULL + && (h != NULL || info->shared)) + { + srelgot = bfd_get_linker_section (dynobj, ".rela.got"); + if (srelgot == NULL) + { + flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS + | SEC_IN_MEMORY | SEC_LINKER_CREATED + | SEC_READONLY); + srelgot = bfd_make_section_anyway_with_flags (dynobj, + ".rela.got", + flags); + if (srelgot == NULL + || !bfd_set_section_alignment (dynobj, srelgot, 2)) + return FALSE; + } + } + + if (got == NULL) + { + struct elf_m68k_bfd2got_entry *bfd2got_entry; + + bfd2got_entry + = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), + abfd, FIND_OR_CREATE, info); + if (bfd2got_entry == NULL) + return FALSE; + + got = bfd2got_entry->got; + BFD_ASSERT (got != NULL); + } + + { + struct elf_m68k_got_entry *got_entry; + + /* Add entry to got. */ + got_entry = elf_m68k_add_entry_to_got (got, h, abfd, + ELF32_R_TYPE (rel->r_info), + r_symndx, info); + if (got_entry == NULL) + return FALSE; + + if (got_entry->u.s1.refcount == 1) + { + /* Make sure this symbol is output as a dynamic symbol. */ + if (h != NULL + && h->dynindx == -1 + && !h->forced_local) + { + if (!bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + } + } + + break; + + case R_68K_PLT8: + case R_68K_PLT16: + case R_68K_PLT32: + /* This symbol requires a procedure linkage table entry. We + actually build the entry in adjust_dynamic_symbol, + because this might be a case of linking PIC code which is + never referenced by a dynamic object, in which case we + don't need to generate a procedure linkage table entry + after all. */ + + /* If this is a local symbol, we resolve it directly without + creating a procedure linkage table entry. */ + if (h == NULL) + continue; + + h->needs_plt = 1; + h->plt.refcount++; + break; + + case R_68K_PLT8O: + case R_68K_PLT16O: + case R_68K_PLT32O: + /* This symbol requires a procedure linkage table entry. */ + + if (h == NULL) + { + /* It does not make sense to have this relocation for a + local symbol. FIXME: does it? How to handle it if + it does make sense? */ + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1 + && !h->forced_local) + { + if (!bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + h->needs_plt = 1; + h->plt.refcount++; + break; + + case R_68K_PC8: + case R_68K_PC16: + case R_68K_PC32: + /* If we are creating a shared library and this is not a local + symbol, we need to copy the reloc into the shared library. + However when linking with -Bsymbolic and this is a global + symbol which is defined in an object we are including in the + link (i.e., DEF_REGULAR is set), then we can resolve the + reloc directly. At this point we have not seen all the input + files, so it is possible that DEF_REGULAR is not set now but + will be set later (it is never cleared). We account for that + possibility below by storing information in the + pcrel_relocs_copied field of the hash table entry. */ + if (!(info->shared + && (sec->flags & SEC_ALLOC) != 0 + && h != NULL + && (!info->symbolic + || h->root.type == bfd_link_hash_defweak + || !h->def_regular))) + { + if (h != NULL) + { + /* 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++; + } + break; + } + /* Fall through. */ + case R_68K_8: + case R_68K_16: + case R_68K_32: + /* We don't need to handle relocs into sections not going into + the "real" output. */ + if ((sec->flags & SEC_ALLOC) == 0) + break; + + if (h != NULL) + { + /* 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 (info->executable) + /* This symbol needs a non-GOT reference. */ + h->non_got_ref = 1; + } + + /* If we are creating a shared library, we need to copy the + reloc into the shared library. */ + if (info->shared) + { + /* 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, /*rela?*/ TRUE); + + if (sreloc == NULL) + return FALSE; + } + + if (sec->flags & SEC_READONLY + /* Don't set DF_TEXTREL yet for PC relative + relocations, they might be discarded later. */ + && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8 + || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 + || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)) + info->flags |= DF_TEXTREL; + + sreloc->size += sizeof (Elf32_External_Rela); + + /* We count the number of PC relative relocations we have + entered for this symbol, so that we can discard them + again if, in the -Bsymbolic case, the symbol is later + defined by a regular object, or, in the normal shared + case, the symbol is forced to be local. Note that this + function is only called if we are using an m68kelf linker + hash table, which means that h is really a pointer to an + elf_m68k_link_hash_entry. */ + if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 + || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 + || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) + { + struct elf_m68k_pcrel_relocs_copied *p; + struct elf_m68k_pcrel_relocs_copied **head; + + if (h != NULL) + { + struct elf_m68k_link_hash_entry *eh + = elf_m68k_hash_entry (h); + head = &eh->pcrel_relocs_copied; + } + else + { + asection *s; + void *vpp; + Elf_Internal_Sym *isym; + + isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->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 elf_m68k_pcrel_relocs_copied **) vpp; + } + + for (p = *head; p != NULL; p = p->next) + if (p->section == sreloc) + break; + + if (p == NULL) + { + p = ((struct elf_m68k_pcrel_relocs_copied *) + bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->section = sreloc; + p->count = 0; + } + + ++p->count; + } + } + + break; + + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_68K_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_68K_GNU_VTENTRY: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + + default: + break; + } + } + + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +elf_m68k_gc_mark_hook (asection *sec, + struct bfd_link_info *info, + 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_68K_GNU_VTINHERIT: + case R_68K_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + +/* Update the got entry reference counts for the section being removed. */ + +static bfd_boolean +elf_m68k_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; + const Elf_Internal_Rela *rel, *relend; + bfd *dynobj; + struct elf_m68k_got *got; + + if (info->relocatable) + return TRUE; + + dynobj = elf_hash_table (info)->dynobj; + if (dynobj == NULL) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + got = NULL; + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h = NULL; + + 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; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_68K_GOT8: + case R_68K_GOT16: + case R_68K_GOT32: + if (h != NULL + && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + + /* FALLTHRU */ + case R_68K_GOT8O: + case R_68K_GOT16O: + case R_68K_GOT32O: + /* Fall through. */ + + /* TLS relocations. */ + case R_68K_TLS_GD8: + case R_68K_TLS_GD16: + case R_68K_TLS_GD32: + case R_68K_TLS_LDM8: + case R_68K_TLS_LDM16: + case R_68K_TLS_LDM32: + case R_68K_TLS_IE8: + case R_68K_TLS_IE16: + case R_68K_TLS_IE32: + + case R_68K_TLS_TPREL32: + case R_68K_TLS_DTPREL32: + + if (got == NULL) + { + got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), + abfd, MUST_FIND, NULL)->got; + BFD_ASSERT (got != NULL); + } + + { + struct elf_m68k_got_entry_key key_; + struct elf_m68k_got_entry **got_entry_ptr; + struct elf_m68k_got_entry *got_entry; + + elf_m68k_init_got_entry_key (&key_, h, abfd, r_symndx, + ELF32_R_TYPE (rel->r_info)); + got_entry_ptr = elf_m68k_find_got_entry_ptr (got, &key_); + + got_entry = *got_entry_ptr; + + if (got_entry->u.s1.refcount > 0) + { + --got_entry->u.s1.refcount; + + if (got_entry->u.s1.refcount == 0) + /* We don't need the .got entry any more. */ + elf_m68k_remove_got_entry (got, got_entry_ptr); + } + } + break; + + case R_68K_PLT8: + case R_68K_PLT16: + case R_68K_PLT32: + case R_68K_PLT8O: + case R_68K_PLT16O: + case R_68K_PLT32O: + case R_68K_PC8: + case R_68K_PC16: + case R_68K_PC32: + case R_68K_8: + case R_68K_16: + case R_68K_32: + if (h != NULL) + { + if (h->plt.refcount > 0) + --h->plt.refcount; + } + break; + + default: + break; + } + } + + return TRUE; +} + +/* Return the type of PLT associated with OUTPUT_BFD. */ + +static const struct elf_m68k_plt_info * +elf_m68k_get_plt_info (bfd *output_bfd) +{ + unsigned int features; + + features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd)); + if (features & cpu32) + return &elf_cpu32_plt_info; + if (features & mcfisa_b) + return &elf_isab_plt_info; + if (features & mcfisa_c) + return &elf_isac_plt_info; + return &elf_m68k_plt_info; +} + +/* This function is called after all the input files have been read, + and the input sections have been assigned to output sections. + It's a convenient place to determine the PLT style. */ + +static bfd_boolean +elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) +{ + /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got + sections. */ + if (!elf_m68k_partition_multi_got (info)) + return FALSE; + + elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd); + return TRUE; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static bfd_boolean +elf_m68k_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + struct elf_m68k_link_hash_table *htab; + bfd *dynobj; + asection *s; + + htab = elf_m68k_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)) + /* We must always create the plt entry if it was referenced + by a PLTxxO relocation. In this case we already recorded + it as a dynamic symbol. */ + && h->dynindx == -1) + { + /* This case can occur if we saw a PLTxx 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 PCxx reloc instead. */ + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + return TRUE; + } + + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + s = bfd_get_linker_section (dynobj, ".plt"); + BFD_ASSERT (s != NULL); + + /* If this is the first .plt entry, make room for the special + first entry. */ + if (s->size == 0) + s->size = htab->plt_info->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 = s->size; + } + + h->plt.offset = s->size; + + /* Make room for this entry. */ + s->size += htab->plt_info->size; + + /* We also need to make an entry in the .got.plt section, which + will be placed in the .got section by the linker script. */ + s = bfd_get_linker_section (dynobj, ".got.plt"); + BFD_ASSERT (s != NULL); + s->size += 4; + + /* We also need to make an entry in the .rela.plt section. */ + s = bfd_get_linker_section (dynobj, ".rela.plt"); + BFD_ASSERT (s != NULL); + s->size += sizeof (Elf32_External_Rela); + + 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; + } + + /* 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 there are no references to this symbol that do not use the + GOT, we don't need to generate a copy reloc. */ + if (!h->non_got_ref) + return TRUE; + + /* 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 = bfd_get_linker_section (dynobj, ".dynbss"); + BFD_ASSERT (s != NULL); + + /* We must generate a R_68K_COPY reloc to tell the dynamic linker to + copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) + { + asection *srel; + + srel = bfd_get_linker_section (dynobj, ".rela.bss"); + BFD_ASSERT (srel != NULL); + srel->size += sizeof (Elf32_External_Rela); + h->needs_copy = 1; + } + + return _bfd_elf_adjust_dynamic_copy (h, s); +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +elf_m68k_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + bfd *dynobj; + asection *s; + bfd_boolean plt; + bfd_boolean relocs; + + dynobj = elf_hash_table (info)->dynobj; + BFD_ASSERT (dynobj != NULL); + + 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 = bfd_get_linker_section (dynobj, ".rela.got"); + if (s != NULL) + s->size = 0; + } + + /* If this is a -Bsymbolic shared link, then we need to discard all + PC relative relocs against symbols defined in a regular object. + For the normal shared case we discard the PC relative relocs + against symbols that have become local due to visibility changes. + We allocated space for them in the check_relocs routine, but we + will not fill them in in the relocate_section routine. */ + if (info->shared) + elf_link_hash_traverse (elf_hash_table (info), + elf_m68k_discard_copies, + 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; + 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; + } + 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") + && 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 initialise the section's + contents to zero. */ + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); + if (s->contents == NULL) + return FALSE; + } + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in elf_m68k_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (info->executable) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (plt) + { + if (!add_dynamic_entry (DT_PLTGOT, 0) + || !add_dynamic_entry (DT_PLTRELSZ, 0) + || !add_dynamic_entry (DT_PLTREL, DT_RELA) + || !add_dynamic_entry (DT_JMPREL, 0)) + return FALSE; + } + + if (relocs) + { + if (!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->flags & DF_TEXTREL) != 0) + { + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } +#undef add_dynamic_entry + + return TRUE; +} + +/* This function is called via elf_link_hash_traverse if we are + creating a shared object. In the -Bsymbolic case it discards the + space allocated to copy PC relative relocs against symbols which + are defined in regular objects. For the normal shared case, it + discards space for pc-relative relocs that have become local due to + symbol visibility changes. We allocated space for them in the + check_relocs routine, but we won't fill them in in the + relocate_section routine. + + We also check whether any of the remaining relocations apply + against a readonly section, and set the DF_TEXTREL flag in this + case. */ + +static bfd_boolean +elf_m68k_discard_copies (struct elf_link_hash_entry *h, + void * inf) +{ + struct bfd_link_info *info = (struct bfd_link_info *) inf; + struct elf_m68k_pcrel_relocs_copied *s; + + if (!SYMBOL_CALLS_LOCAL (info, h)) + { + if ((info->flags & DF_TEXTREL) == 0) + { + /* Look for relocations against read-only sections. */ + for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; + s != NULL; + s = s->next) + if ((s->section->flags & SEC_READONLY) != 0) + { + info->flags |= DF_TEXTREL; + break; + } + } + + /* Make sure undefined weak symbols are output as a dynamic symbol + in PIEs. */ + if (h->non_got_ref + && h->root.type == bfd_link_hash_undefweak + && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + && h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + return TRUE; + } + + for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; + s != NULL; + s = s->next) + s->section->size -= s->count * sizeof (Elf32_External_Rela); + + return TRUE; +} + + +/* Install relocation RELA. */ + +static void +elf_m68k_install_rela (bfd *output_bfd, + asection *srela, + Elf_Internal_Rela *rela) +{ + bfd_byte *loc; + + loc = srela->contents; + loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, rela, loc); +} + +/* Find the base offsets for thread-local storage in this object, + for GD/LD and IE/LE respectively. */ + +#define DTP_OFFSET 0x8000 +#define TP_OFFSET 0x7000 + +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 + DTP_OFFSET; +} + +static bfd_vma +tpoff_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 + TP_OFFSET; +} + +/* Output necessary relocation to handle a symbol during static link. + This function is called from elf_m68k_relocate_section. */ + +static void +elf_m68k_init_got_entry_static (struct bfd_link_info *info, + bfd *output_bfd, + enum elf_m68k_reloc_type r_type, + asection *sgot, + bfd_vma got_entry_offset, + bfd_vma relocation) +{ + switch (elf_m68k_reloc_got_type (r_type)) + { + case R_68K_GOT32O: + bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset); + break; + + case R_68K_TLS_GD32: + /* We know the offset within the module, + put it into the second GOT slot. */ + bfd_put_32 (output_bfd, relocation - dtpoff_base (info), + sgot->contents + got_entry_offset + 4); + /* FALLTHRU */ + + case R_68K_TLS_LDM32: + /* Mark it as belonging to module 1, the executable. */ + bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset); + break; + + case R_68K_TLS_IE32: + bfd_put_32 (output_bfd, relocation - tpoff_base (info), + sgot->contents + got_entry_offset); + break; + + default: + BFD_ASSERT (FALSE); + } +} + +/* Output necessary relocation to handle a local symbol + during dynamic link. + This function is called either from elf_m68k_relocate_section + or from elf_m68k_finish_dynamic_symbol. */ + +static void +elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info, + bfd *output_bfd, + enum elf_m68k_reloc_type r_type, + asection *sgot, + bfd_vma got_entry_offset, + bfd_vma relocation, + asection *srela) +{ + Elf_Internal_Rela outrel; + + switch (elf_m68k_reloc_got_type (r_type)) + { + case R_68K_GOT32O: + /* Emit RELATIVE relocation to initialize GOT slot + at run-time. */ + outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); + outrel.r_addend = relocation; + break; + + case R_68K_TLS_GD32: + /* We know the offset within the module, + put it into the second GOT slot. */ + bfd_put_32 (output_bfd, relocation - dtpoff_base (info), + sgot->contents + got_entry_offset + 4); + /* FALLTHRU */ + + case R_68K_TLS_LDM32: + /* We don't know the module number, + create a relocation for it. */ + outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32); + outrel.r_addend = 0; + break; + + case R_68K_TLS_IE32: + /* Emit TPREL relocation to initialize GOT slot + at run-time. */ + outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32); + outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma; + break; + + default: + BFD_ASSERT (FALSE); + } + + /* Offset of the GOT entry. */ + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + got_entry_offset); + + /* Install one of the above relocations. */ + elf_m68k_install_rela (output_bfd, srela, &outrel); + + bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset); +} + +/* Relocate an M68K ELF section. */ + +static bfd_boolean +elf_m68k_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) +{ + bfd *dynobj; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + asection *sgot; + asection *splt; + asection *sreloc; + asection *srela; + struct elf_m68k_got *got; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + + dynobj = elf_hash_table (info)->dynobj; + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + + sgot = NULL; + splt = NULL; + sreloc = NULL; + srela = NULL; + + got = NULL; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + int r_type; + reloc_howto_type *howto; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + asection *sec; + bfd_vma relocation; + bfd_boolean unresolved_reloc; + bfd_reloc_status_type r; + + r_type = ELF32_R_TYPE (rel->r_info); + if (r_type < 0 || r_type >= (int) R_68K_max) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + howto = howto_table + r_type; + + r_symndx = ELF32_R_SYM (rel->r_info); + + h = NULL; + sym = NULL; + sec = NULL; + unresolved_reloc = FALSE; + + 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 != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + if (info->relocatable) + continue; + + switch (r_type) + { + case R_68K_GOT8: + case R_68K_GOT16: + case R_68K_GOT32: + /* Relocation is to the address of the entry for this symbol + in the global offset table. */ + if (h != NULL + && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + { + if (elf_m68k_hash_table (info)->local_gp_p) + { + bfd_vma sgot_output_offset; + bfd_vma got_offset; + + if (sgot == NULL) + { + sgot = bfd_get_linker_section (dynobj, ".got"); + + if (sgot != NULL) + sgot_output_offset = sgot->output_offset; + else + /* In this case we have a reference to + _GLOBAL_OFFSET_TABLE_, but the GOT itself is + empty. + ??? Issue a warning? */ + sgot_output_offset = 0; + } + else + sgot_output_offset = sgot->output_offset; + + if (got == NULL) + { + struct elf_m68k_bfd2got_entry *bfd2got_entry; + + bfd2got_entry + = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), + input_bfd, SEARCH, NULL); + + if (bfd2got_entry != NULL) + { + got = bfd2got_entry->got; + BFD_ASSERT (got != NULL); + + got_offset = got->offset; + } + else + /* In this case we have a reference to + _GLOBAL_OFFSET_TABLE_, but no other references + accessing any GOT entries. + ??? Issue a warning? */ + got_offset = 0; + } + else + got_offset = got->offset; + + /* Adjust GOT pointer to point to the GOT + assigned to input_bfd. */ + rel->r_addend += sgot_output_offset + got_offset; + } + else + BFD_ASSERT (got == NULL || got->offset == 0); + + break; + } + /* Fall through. */ + case R_68K_GOT8O: + case R_68K_GOT16O: + case R_68K_GOT32O: + + case R_68K_TLS_LDM32: + case R_68K_TLS_LDM16: + case R_68K_TLS_LDM8: + + case R_68K_TLS_GD8: + case R_68K_TLS_GD16: + case R_68K_TLS_GD32: + + case R_68K_TLS_IE8: + case R_68K_TLS_IE16: + case R_68K_TLS_IE32: + + /* Relocation is the offset of the entry for this symbol in + the global offset table. */ + + { + struct elf_m68k_got_entry_key key_; + bfd_vma *off_ptr; + bfd_vma off; + + if (sgot == NULL) + { + sgot = bfd_get_linker_section (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + } + + if (got == NULL) + { + got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), + input_bfd, MUST_FIND, + NULL)->got; + BFD_ASSERT (got != NULL); + } + + /* Get GOT offset for this symbol. */ + elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx, + r_type); + off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND, + NULL)->u.s2.offset; + off = *off_ptr; + + /* 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 + { + if (h != NULL + /* @TLSLDM relocations are bounded to the module, in + which the symbol is defined -- not to the symbol + itself. */ + && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32) + { + bfd_boolean dyn; + + 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, or the symbol was forced to be local + because of a version file. 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. */ + + elf_m68k_init_got_entry_static (info, + output_bfd, + r_type, + sgot, + off, + relocation); + + *off_ptr |= 1; + } + else + unresolved_reloc = FALSE; + } + else if (info->shared) /* && h == NULL */ + /* Process local symbol during dynamic link. */ + { + if (srela == NULL) + { + srela = bfd_get_linker_section (dynobj, ".rela.got"); + BFD_ASSERT (srela != NULL); + } + + elf_m68k_init_got_entry_local_shared (info, + output_bfd, + r_type, + sgot, + off, + relocation, + srela); + + *off_ptr |= 1; + } + else /* h == NULL && !info->shared */ + { + elf_m68k_init_got_entry_static (info, + output_bfd, + r_type, + sgot, + off, + relocation); + + *off_ptr |= 1; + } + } + + /* We don't use elf_m68k_reloc_got_type in the condition below + because this is the only place where difference between + R_68K_GOTx and R_68K_GOTxO relocations matters. */ + if (r_type == R_68K_GOT32O + || r_type == R_68K_GOT16O + || r_type == R_68K_GOT8O + || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32 + || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32 + || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32) + { + /* GOT pointer is adjusted to point to the start/middle + of local GOT. Adjust the offset accordingly. */ + BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p + || off >= got->offset); + + if (elf_m68k_hash_table (info)->local_gp_p) + relocation = off - got->offset; + else + { + BFD_ASSERT (got->offset == 0); + relocation = sgot->output_offset + off; + } + + /* This relocation does not use the addend. */ + rel->r_addend = 0; + } + else + relocation = (sgot->output_section->vma + sgot->output_offset + + off); + } + break; + + case R_68K_TLS_LDO32: + case R_68K_TLS_LDO16: + case R_68K_TLS_LDO8: + relocation -= dtpoff_base (info); + break; + + case R_68K_TLS_LE32: + case R_68K_TLS_LE16: + case R_68K_TLS_LE8: + if (info->shared && !info->pie) + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted " + "in shared object"), + input_bfd, input_section, (long) rel->r_offset, howto->name); + + return FALSE; + } + else + relocation -= tpoff_base (info); + + break; + + case R_68K_PLT8: + case R_68K_PLT16: + case R_68K_PLT32: + /* Relocation is to the entry for this symbol in the + procedure linkage table. */ + + /* Resolve a PLTxx reloc against a local symbol directly, + without using the procedure linkage table. */ + if (h == NULL) + break; + + if (h->plt.offset == (bfd_vma) -1 + || !elf_hash_table (info)->dynamic_sections_created) + { + /* We didn't make a PLT entry for this symbol. This + happens when statically linking PIC code, or when + using -Bsymbolic. */ + break; + } + + if (splt == NULL) + { + splt = bfd_get_linker_section (dynobj, ".plt"); + BFD_ASSERT (splt != NULL); + } + + relocation = (splt->output_section->vma + + splt->output_offset + + h->plt.offset); + unresolved_reloc = FALSE; + break; + + case R_68K_PLT8O: + case R_68K_PLT16O: + case R_68K_PLT32O: + /* Relocation is the offset of the entry for this symbol in + the procedure linkage table. */ + BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); + + if (splt == NULL) + { + splt = bfd_get_linker_section (dynobj, ".plt"); + BFD_ASSERT (splt != NULL); + } + + relocation = h->plt.offset; + unresolved_reloc = FALSE; + + /* This relocation does not use the addend. */ + rel->r_addend = 0; + + break; + + case R_68K_8: + case R_68K_16: + case R_68K_32: + case R_68K_PC8: + case R_68K_PC16: + case R_68K_PC32: + if (info->shared + && r_symndx != STN_UNDEF + && (input_section->flags & SEC_ALLOC) != 0 + && (h == NULL + || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak) + && ((r_type != R_68K_PC8 + && r_type != R_68K_PC16 + && r_type != R_68K_PC32) + || !SYMBOL_CALLS_LOCAL (info, h))) + { + 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 + && (r_type == R_68K_PC8 + || r_type == R_68K_PC16 + || r_type == R_68K_PC32 + || !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; + + if (r_type == R_68K_32) + { + relocate = TRUE; + outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); + } + else + { + long indx; + + if (bfd_is_abs_section (sec)) + indx = 0; + else if (sec == NULL || sec->owner == NULL) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + else + { + asection *osec; + + /* We are turning this relocation into one + against a section symbol. It would be + proper to subtract the symbol's value, + osec->vma, from the emitted reloc addend, + but ld.so expects buggy relocs. */ + osec = sec->output_section; + indx = elf_section_data (osec)->dynindx; + if (indx == 0) + { + struct elf_link_hash_table *htab; + htab = elf_hash_table (info); + osec = htab->text_index_section; + indx = elf_section_data (osec)->dynindx; + } + BFD_ASSERT (indx != 0); + } + + outrel.r_info = ELF32_R_INFO (indx, r_type); + } + } + + 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_68K_32 + relocations that have been turned into + R_68K_RELATIVE. */ + if (!relocate) + continue; + } + + break; + + case R_68K_GNU_VTINHERIT: + case R_68K_GNU_VTENTRY: + /* These are no-ops in the end. */ + continue; + + default: + break; + } + + /* Dynamic relocs are not propagated for SEC_DEBUGGING sections + because such sections are not SEC_ALLOC and thus ld.so will + not process them. */ + if (unresolved_reloc + && !((input_section->flags & SEC_DEBUGGING) != 0 + && h->def_dynamic) + && _bfd_elf_section_offset (output_bfd, info, input_section, + rel->r_offset) != (bfd_vma) -1) + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), + input_bfd, + input_section, + (long) rel->r_offset, + howto->name, + h->root.root.string); + return FALSE; + } + + if (r_symndx != STN_UNDEF + && r_type != R_68K_NONE + && (h == NULL + || h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + char sym_type; + + sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type; + + if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS)) + { + const char *name; + + 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); + } + + (*_bfd_error_handler) + ((sym_type == STT_TLS + ? _("%B(%A+0x%lx): %s used with TLS symbol %s") + : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), + input_bfd, + input_section, + (long) rel->r_offset, + howto->name, + name); + } + } + + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); + + if (r != bfd_reloc_ok) + { + const char *name; + + 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) + return FALSE; + if (*name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + if (r == bfd_reloc_overflow) + { + if (!(info->callbacks->reloc_overflow + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, + rel->r_offset))) + return FALSE; + } + else + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): reloc against `%s': error %d"), + input_bfd, input_section, + (long) rel->r_offset, name, (int) r); + return FALSE; + } + } + } + + return TRUE; +} + +/* Install an M_68K_PC32 relocation against VALUE at offset OFFSET + into section SEC. */ + +static void +elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value) +{ + /* Make VALUE PC-relative. */ + value -= sec->output_section->vma + offset; + + /* Apply any in-place addend. */ + value += bfd_get_32 (sec->owner, sec->contents + offset); + + bfd_put_32 (sec->owner, value, sec->contents + offset); +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +elf_m68k_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + bfd *dynobj; + + dynobj = elf_hash_table (info)->dynobj; + + if (h->plt.offset != (bfd_vma) -1) + { + const struct elf_m68k_plt_info *plt_info; + asection *splt; + asection *sgot; + asection *srela; + bfd_vma plt_index; + bfd_vma got_offset; + Elf_Internal_Rela rela; + bfd_byte *loc; + + /* This symbol has an entry in the procedure linkage table. Set + it up. */ + + BFD_ASSERT (h->dynindx != -1); + + plt_info = elf_m68k_hash_table (info)->plt_info; + splt = bfd_get_linker_section (dynobj, ".plt"); + sgot = bfd_get_linker_section (dynobj, ".got.plt"); + srela = bfd_get_linker_section (dynobj, ".rela.plt"); + BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); + + /* Get the index in the procedure linkage table which + corresponds to this symbol. This is the index of this symbol + in all the symbols for which we are making plt entries. The + first entry in the procedure linkage table is reserved. */ + plt_index = (h->plt.offset / plt_info->size) - 1; + + /* Get the offset into the .got table of the entry that + corresponds to this function. Each .got entry is 4 bytes. + The first three are reserved. */ + got_offset = (plt_index + 3) * 4; + + memcpy (splt->contents + h->plt.offset, + plt_info->symbol_entry, + plt_info->size); + + elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got, + (sgot->output_section->vma + + sgot->output_offset + + got_offset)); + + bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), + splt->contents + + h->plt.offset + + plt_info->symbol_resolve_entry + 2); + + elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt, + splt->output_section->vma); + + /* Fill in the entry in the global offset table. */ + bfd_put_32 (output_bfd, + (splt->output_section->vma + + splt->output_offset + + h->plt.offset + + plt_info->symbol_resolve_entry), + sgot->contents + got_offset); + + /* Fill in the entry in the .rela.plt section. */ + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + got_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_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 (elf_m68k_hash_entry (h)->glist != NULL) + { + asection *sgot; + asection *srela; + struct elf_m68k_got_entry *got_entry; + + /* This symbol has an entry in the global offset table. Set it + up. */ + + sgot = bfd_get_linker_section (dynobj, ".got"); + srela = bfd_get_linker_section (dynobj, ".rela.got"); + BFD_ASSERT (sgot != NULL && srela != NULL); + + got_entry = elf_m68k_hash_entry (h)->glist; + + while (got_entry != NULL) + { + enum elf_m68k_reloc_type r_type; + bfd_vma got_entry_offset; + + r_type = got_entry->key_.type; + got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1; + + /* 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 already have been + initialized in the relocate_section function. */ + if (info->shared + && SYMBOL_REFERENCES_LOCAL (info, h)) + { + bfd_vma relocation; + + relocation = bfd_get_signed_32 (output_bfd, + (sgot->contents + + got_entry_offset)); + + /* Undo TP bias. */ + switch (elf_m68k_reloc_got_type (r_type)) + { + case R_68K_GOT32O: + case R_68K_TLS_LDM32: + break; + + case R_68K_TLS_GD32: + /* The value for this relocation is actually put in + the second GOT slot. */ + relocation = bfd_get_signed_32 (output_bfd, + (sgot->contents + + got_entry_offset + 4)); + relocation += dtpoff_base (info); + break; + + case R_68K_TLS_IE32: + relocation += tpoff_base (info); + break; + + default: + BFD_ASSERT (FALSE); + } + + elf_m68k_init_got_entry_local_shared (info, + output_bfd, + r_type, + sgot, + got_entry_offset, + relocation, + srela); + } + else + { + Elf_Internal_Rela rela; + + /* Put zeros to GOT slots that will be initialized + at run-time. */ + { + bfd_vma n_slots; + + n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type); + while (n_slots--) + bfd_put_32 (output_bfd, (bfd_vma) 0, + (sgot->contents + got_entry_offset + + 4 * n_slots)); + } + + rela.r_addend = 0; + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + got_entry_offset); + + switch (elf_m68k_reloc_got_type (r_type)) + { + case R_68K_GOT32O: + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); + elf_m68k_install_rela (output_bfd, srela, &rela); + break; + + case R_68K_TLS_GD32: + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32); + elf_m68k_install_rela (output_bfd, srela, &rela); + + rela.r_offset += 4; + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32); + elf_m68k_install_rela (output_bfd, srela, &rela); + break; + + case R_68K_TLS_IE32: + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32); + elf_m68k_install_rela (output_bfd, srela, &rela); + break; + + default: + BFD_ASSERT (FALSE); + break; + } + } + + got_entry = got_entry->u.s2.next; + } + } + + 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 = bfd_get_linker_section (dynobj, ".rela.bss"); + 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_68K_COPY); + rela.r_addend = 0; + loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + } + + return TRUE; +} + +/* Finish up the dynamic sections. */ + +static bfd_boolean +elf_m68k_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) +{ + bfd *dynobj; + asection *sgot; + asection *sdyn; + + dynobj = elf_hash_table (info)->dynobj; + + sgot = bfd_get_linker_section (dynobj, ".got.plt"); + BFD_ASSERT (sgot != NULL); + sdyn = bfd_get_linker_section (dynobj, ".dynamic"); + + if (elf_hash_table (info)->dynamic_sections_created) + { + asection *splt; + Elf32_External_Dyn *dyncon, *dynconend; + + splt = bfd_get_linker_section (dynobj, ".plt"); + 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; + const char *name; + asection *s; + + bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + break; + + case DT_PLTGOT: + name = ".got"; + goto get_vma; + case DT_JMPREL: + name = ".rela.plt"; + get_vma: + s = bfd_get_section_by_name (output_bfd, name); + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_PLTRELSZ: + s = bfd_get_section_by_name (output_bfd, ".rela.plt"); + 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 = bfd_get_section_by_name (output_bfd, ".rela.plt"); + if (s != NULL) + dyn.d_un.d_val -= s->size; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + } + } + + /* Fill in the first entry in the procedure linkage table. */ + if (splt->size > 0) + { + const struct elf_m68k_plt_info *plt_info; + + plt_info = elf_m68k_hash_table (info)->plt_info; + memcpy (splt->contents, plt_info->plt0_entry, plt_info->size); + + elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4, + (sgot->output_section->vma + + sgot->output_offset + + 4)); + + elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8, + (sgot->output_section->vma + + sgot->output_offset + + 8)); + + elf_section_data (splt->output_section)->this_hdr.sh_entsize + = plt_info->size; + } + } + + /* Fill in the first three entries in the global offset table. */ + if (sgot->size > 0) + { + if (sdyn == NULL) + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); + else + bfd_put_32 (output_bfd, + sdyn->output_section->vma + sdyn->output_offset, + sgot->contents); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); + } + + elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; + + return TRUE; +} + +/* Given a .data section and a .emreloc in-memory section, store + relocation information into the .emreloc section which can be + used at runtime to relocate the section. This is called by the + linker when the --embedded-relocs switch is used. This is called + after the add_symbols entry point has been called for all the + objects, and before the final_link entry point is called. */ + +bfd_boolean +bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) + bfd *abfd; + struct bfd_link_info *info; + asection *datasec; + asection *relsec; + char **errmsg; +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Sym *isymbuf = NULL; + Elf_Internal_Rela *internal_relocs = NULL; + Elf_Internal_Rela *irel, *irelend; + bfd_byte *p; + bfd_size_type amt; + + BFD_ASSERT (! info->relocatable); + + *errmsg = NULL; + + if (datasec->reloc_count == 0) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + + /* Get a copy of the native relocations. */ + internal_relocs = (_bfd_elf_link_read_relocs + (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL, + info->keep_memory)); + if (internal_relocs == NULL) + goto error_return; + + amt = (bfd_size_type) datasec->reloc_count * 12; + relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); + if (relsec->contents == NULL) + goto error_return; + + p = relsec->contents; + + irelend = internal_relocs + datasec->reloc_count; + for (irel = internal_relocs; irel < irelend; irel++, p += 12) + { + asection *targetsec; + + /* We are going to write a four byte longword into the runtime + reloc section. The longword will be the address in the data + section which must be relocated. It is followed by the name + of the target section NUL-padded or truncated to 8 + characters. */ + + /* We can only relocate absolute longword relocs at run time. */ + if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) + { + *errmsg = _("unsupported reloc type"); + bfd_set_error (bfd_error_bad_value); + goto error_return; + } + + /* Get the target section referred to by the reloc. */ + if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) + { + /* A local symbol. */ + Elf_Internal_Sym *isym; + + /* Read this BFD's local symbols if we haven't done so already. */ + if (isymbuf == NULL) + { + isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; + if (isymbuf == NULL) + isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, + symtab_hdr->sh_info, 0, + NULL, NULL, NULL); + if (isymbuf == NULL) + goto error_return; + } + + isym = isymbuf + ELF32_R_SYM (irel->r_info); + targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); + } + else + { + unsigned long indx; + struct elf_link_hash_entry *h; + + /* An external symbol. */ + indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; + h = elf_sym_hashes (abfd)[indx]; + BFD_ASSERT (h != NULL); + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + targetsec = h->root.u.def.section; + else + targetsec = NULL; + } + + bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); + memset (p + 4, 0, 8); + if (targetsec != NULL) + strncpy ((char *) p + 4, targetsec->output_section->name, 8); + } + + if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (internal_relocs != NULL + && elf_section_data (datasec)->relocs != internal_relocs) + free (internal_relocs); + return TRUE; + +error_return: + if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (internal_relocs != NULL + && elf_section_data (datasec)->relocs != internal_relocs) + free (internal_relocs); + return FALSE; +} + +/* Set target options. */ + +void +bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling) +{ + struct elf_m68k_link_hash_table *htab; + bfd_boolean use_neg_got_offsets_p; + bfd_boolean allow_multigot_p; + bfd_boolean local_gp_p; + + switch (got_handling) + { + case 0: + /* --got=single. */ + local_gp_p = FALSE; + use_neg_got_offsets_p = FALSE; + allow_multigot_p = FALSE; + break; + + case 1: + /* --got=negative. */ + local_gp_p = TRUE; + use_neg_got_offsets_p = TRUE; + allow_multigot_p = FALSE; + break; + + case 2: + /* --got=multigot. */ + local_gp_p = TRUE; + use_neg_got_offsets_p = TRUE; + allow_multigot_p = TRUE; + break; + + default: + BFD_ASSERT (FALSE); + return; + } + + htab = elf_m68k_hash_table (info); + if (htab != NULL) + { + htab->local_gp_p = local_gp_p; + htab->use_neg_got_offsets_p = use_neg_got_offsets_p; + htab->allow_multigot_p = allow_multigot_p; + } +} + +static enum elf_reloc_type_class +elf32_m68k_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_68K_RELATIVE: + return reloc_class_relative; + case R_68K_JMP_SLOT: + return reloc_class_plt; + case R_68K_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } +} + +/* Return address for Ith PLT stub in section PLT, for relocation REL + or (bfd_vma) -1 if it should not be included. */ + +static bfd_vma +elf_m68k_plt_sym_val (bfd_vma i, const asection *plt, + const arelent *rel ATTRIBUTE_UNUSED) +{ + return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size; +} + +/* Support for core dump NOTE sections. */ + +static bfd_boolean +elf_m68k_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) +{ + int offset; + size_t size; + + switch (note->descsz) + { + default: + return FALSE; + + case 154: /* Linux/m68k */ + /* pr_cursig */ + elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); + + /* pr_pid */ + elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22); + + /* pr_reg */ + offset = 70; + size = 80; + + break; + } + + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", + size, note->descpos + offset); +} + +static bfd_boolean +elf_m68k_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) +{ + switch (note->descsz) + { + default: + return FALSE; + + case 124: /* Linux/m68k elf_prpsinfo. */ + elf_tdata (abfd)->core->pid + = bfd_get_32 (abfd, note->descdata + 12); + 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 (n > 0 && command[n - 1] == ' ') + command[n - 1] = '\0'; + } + + return TRUE; +} + +#define TARGET_BIG_SYM bfd_elf32_m68k_vec +#define TARGET_BIG_NAME "elf32-m68k" +#define ELF_MACHINE_CODE EM_68K +#define ELF_MAXPAGESIZE 0x2000 +#define elf_backend_create_dynamic_sections \ + _bfd_elf_create_dynamic_sections +#define bfd_elf32_bfd_link_hash_table_create \ + elf_m68k_link_hash_table_create +/* ??? Should it be this macro or bfd_elfNN_bfd_link_hash_table_create? */ +#define bfd_elf32_bfd_link_hash_table_free \ + elf_m68k_link_hash_table_free +#define bfd_elf32_bfd_final_link bfd_elf_final_link + +#define elf_backend_check_relocs elf_m68k_check_relocs +#define elf_backend_always_size_sections \ + elf_m68k_always_size_sections +#define elf_backend_adjust_dynamic_symbol \ + elf_m68k_adjust_dynamic_symbol +#define elf_backend_size_dynamic_sections \ + elf_m68k_size_dynamic_sections +#define elf_backend_final_write_processing elf_m68k_final_write_processing +#define elf_backend_init_index_section _bfd_elf_init_1_index_section +#define elf_backend_relocate_section elf_m68k_relocate_section +#define elf_backend_finish_dynamic_symbol \ + elf_m68k_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections \ + elf_m68k_finish_dynamic_sections +#define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook +#define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook +#define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol +#define bfd_elf32_bfd_merge_private_bfd_data \ + elf32_m68k_merge_private_bfd_data +#define bfd_elf32_bfd_set_private_flags \ + elf32_m68k_set_private_flags +#define bfd_elf32_bfd_print_private_bfd_data \ + elf32_m68k_print_private_bfd_data +#define elf_backend_reloc_type_class elf32_m68k_reloc_type_class +#define elf_backend_plt_sym_val elf_m68k_plt_sym_val +#define elf_backend_object_p elf32_m68k_object_p +#define elf_backend_grok_prstatus elf_m68k_grok_prstatus +#define elf_backend_grok_psinfo elf_m68k_grok_psinfo + +#define elf_backend_can_gc_sections 1 +#define elf_backend_can_refcount 1 +#define elf_backend_want_got_plt 1 +#define elf_backend_plt_readonly 1 +#define elf_backend_want_plt_sym 0 +#define elf_backend_got_header_size 12 +#define elf_backend_rela_normal 1 + +#include "elf32-target.h" |