mirror of
https://sourceware.org/git/binutils-gdb.git
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f1dfbfdbc6
Since many ELF backends have sym_cache to their link hash tables, add sym_cache to elf_link_hash_table. Also use sdynbss and srelbss in elf_link_hash_table. * elf-bfd.h (sym_cache): Moved before elf_link_hash_table. (elf_link_hash_table): Add sym_cache. * elf32-arm.c (elf32_arm_link_hash_table): Remove sym_cache. (elf32_arm_check_relocs): Updated. (elf32_arm_size_dynamic_sections): Likewise. * elf32-bfin.c (bfin_link_hash_table): Removed. (bfin_link_hash_newfunc): Updated. (bfin_hash_table): Removed. * elf32-csky.c (csky_elf_link_hash_table): Remove sym_cache. (csky_elf_check_relocs): Updated. * elf32-hppa.c (elf32_hppa_link_hash_table): Remove sym_cache. (elf32_hppa_check_relocs): Updated. * elf32-i386.c (elf_i386_tls_transition): Updated. (elf_i386_convert_load_reloc): Likewise. (elf_i386_check_relocs): Likewise. * elf32-m32r.c (elf_m32r_link_hash_table): Removed. (m32r_elf_hash_table): Updated. (m32r_elf_link_hash_table_create): Likewise. (m32r_elf_create_dynamic_sections): Likewise. (m32r_elf_adjust_dynamic_symbol): Likewise. (allocate_dynrelocs): Likewise. (m32r_elf_size_dynamic_sections): Likewise. (m32r_elf_relocate_section): Likewise. (m32r_elf_finish_dynamic_symbol): Likewise. (m32r_elf_check_relocs): Likewise. * elf32-m68hc1x.h (m68hc11_elf_link_hash_table): Remove sym_cache. * elf32-m68k.c (elf_m68k_link_hash_table): Likewise. (elf_m68k_check_relocs): Updated. * elf32-metag.c (elf_metag_link_hash_table): Remove sym_cache. (elf_metag_check_relocs): Updated. * elf32-microblaze.c (elf32_mb_link_hash_table): Remove sym_sec. (microblaze_elf_check_relocs): Updated. * elf32-nds32.c (nds32_elf_link_hash_table_create): Likewise. (nds32_elf_create_dynamic_sections): Likewise. (nds32_elf_adjust_dynamic_symbol): Likewise. (nds32_elf_check_relocs): Likewise. * elf32-nds32.h (elf_nds32_link_hash_table): Remove sdynbss, srelbss and aym_cache. * elf32-nios2.c (elf32_nios2_link_hash_table): Remove sym_cache. (nios2_elf32_check_relocs): Updated. * elf32-or1k.c (elf_or1k_link_hash_table): Remove sym_sec. (or1k_elf_check_relocs): Updated. * elf32-ppc.c (ppc_elf_check_relocs): Remove sym_cache. (ppc_elf_check_relocs): Updated. * elf32-s390.c (elf_s390_link_hash_table): Remove sym_cache. (elf_s390_check_relocs): Updated. (elf_s390_finish_dynamic_sections): Likewise. * elf32-sh.c (elf_sh_link_hash_table): Remove sdynbss, srelbss and aym_cache. (sh_elf_create_dynamic_sections): Updated. (sh_elf_adjust_dynamic_symbol): Likewise. (sh_elf_size_dynamic_sections): Likewise. (sh_elf_check_relocs): Likewise. * elf32-tic6x.c (elf32_tic6x_link_hash_table): Remove sym_cache. (elf32_tic6x_check_relocs): Updated. * elf32-tilepro.c (tilepro_elf_link_hash_table): Removed. (tilepro_elf_hash_table): Updated. (tilepro_elf_link_hash_table_create): Likewise. (tilepro_elf_check_relocs): Likewise. (tilepro_elf_adjust_dynamic_symbol): Likewise. (allocate_dynrelocs): Likewise. (tilepro_elf_size_dynamic_sections): Likewise. (tilepro_elf_relocate_section): Likewise. (tilepro_elf_finish_dynamic_symbol): Likewise. (tilepro_finish_dyn): Likewise. (tilepro_elf_finish_dynamic_sections): Likewise. * elf64-ppc.c (ppc_link_hash_table): Remove sym_cache. (ppc64_elf_before_check_relocs): Updated. (ppc64_elf_check_relocs): Likewise. * elf64-s390.c (elf_s390_link_hash_table): Remove sym_cache. (elf_s390_check_relocs): Updated. (elf_s390_relocate_section): Likewise. (elf_s390_finish_dynamic_sections): Likewise. * elf64-x86-64.c (elf_x86_64_tls_transition): Likewise. (elf_x86_64_check_relocs): Likewise. * elfnn-aarch64.c (elf_aarch64_link_hash_table): Remove sym_cache. (elfNN_aarch64_check_relocs): Updated. * elfnn-riscv.c (riscv_elf_link_hash_table): Remove sym_cache. (riscv_elf_check_relocs): Updated. * elfxx-mips.c (mips_elf_link_hash_table): Remove sym_cache. (mips_elf_resolve_got_page_ref): Updated. * elfxx-sparc.c (_bfd_sparc_elf_check_relocs): Likewise. * elfxx-sparc.h (_bfd_sparc_elf_link_hash_table): Remove sym_cache. * elfxx-tilegx.c (tilegx_elf_link_hash_table): Likewise. (tilegx_elf_check_relocs): Updated. * elfxx-x86.h (elf_x86_link_hash_table): Remove sym_cache.
4619 lines
132 KiB
C
4619 lines
132 KiB
C
/* Intel 80386/80486-specific support for 32-bit ELF
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Copyright (C) 1993-2020 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "elfxx-x86.h"
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#include "elf-vxworks.h"
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#include "dwarf2.h"
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#include "opcode/i386.h"
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/* 386 uses REL relocations instead of RELA. */
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#define USE_REL 1
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#include "elf/i386.h"
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static reloc_howto_type elf_howto_table[]=
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{
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HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_386_NONE",
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TRUE, 0x00000000, 0x00000000, FALSE),
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HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_PC32",
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TRUE, 0xffffffff, 0xffffffff, TRUE),
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HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_GOT32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_PLT32",
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TRUE, 0xffffffff, 0xffffffff, TRUE),
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HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_COPY",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_GLOB_DAT",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_RELATIVE",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_GOTOFF",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_GOTPC",
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TRUE, 0xffffffff, 0xffffffff, TRUE),
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/* We have a gap in the reloc numbers here.
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R_386_standard counts the number up to this point, and
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R_386_ext_offset is the value to subtract from a reloc type of
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R_386_16 thru R_386_PC8 to form an index into this table. */
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#define R_386_standard (R_386_GOTPC + 1)
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#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
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/* These relocs are a GNU extension. */
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HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_IE",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_LE",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_GD",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_LDM",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_16",
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TRUE, 0xffff, 0xffff, FALSE),
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HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_PC16",
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TRUE, 0xffff, 0xffff, TRUE),
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HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_8",
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TRUE, 0xff, 0xff, FALSE),
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HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
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bfd_elf_generic_reloc, "R_386_PC8",
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TRUE, 0xff, 0xff, TRUE),
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#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
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#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
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/* These are common with Solaris TLS implementation. */
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HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_IE_32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_LE_32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
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bfd_elf_generic_reloc, "R_386_SIZE32",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
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FALSE, 0, 0, FALSE),
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HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_TLS_DESC",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_IRELATIVE",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_386_GOT32X",
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TRUE, 0xffffffff, 0xffffffff, FALSE),
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/* Another gap. */
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#define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
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#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
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/* GNU extension to record C++ vtable hierarchy. */
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HOWTO (R_386_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_386_GNU_VTINHERIT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage. */
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HOWTO (R_386_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_386_GNU_VTENTRY", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE) /* pcrel_offset */
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#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
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};
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#define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
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#define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
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#ifdef DEBUG_GEN_RELOC
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#define TRACE(str) \
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fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
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#else
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#define TRACE(str)
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#endif
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static reloc_howto_type *
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elf_i386_reloc_type_lookup (bfd *abfd,
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bfd_reloc_code_real_type code)
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{
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switch (code)
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{
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case BFD_RELOC_NONE:
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TRACE ("BFD_RELOC_NONE");
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return &elf_howto_table[R_386_NONE];
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case BFD_RELOC_32:
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TRACE ("BFD_RELOC_32");
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return &elf_howto_table[R_386_32];
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case BFD_RELOC_CTOR:
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TRACE ("BFD_RELOC_CTOR");
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return &elf_howto_table[R_386_32];
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case BFD_RELOC_32_PCREL:
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TRACE ("BFD_RELOC_PC32");
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return &elf_howto_table[R_386_PC32];
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case BFD_RELOC_386_GOT32:
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TRACE ("BFD_RELOC_386_GOT32");
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return &elf_howto_table[R_386_GOT32];
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case BFD_RELOC_386_PLT32:
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TRACE ("BFD_RELOC_386_PLT32");
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return &elf_howto_table[R_386_PLT32];
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case BFD_RELOC_386_COPY:
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TRACE ("BFD_RELOC_386_COPY");
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return &elf_howto_table[R_386_COPY];
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case BFD_RELOC_386_GLOB_DAT:
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TRACE ("BFD_RELOC_386_GLOB_DAT");
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return &elf_howto_table[R_386_GLOB_DAT];
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case BFD_RELOC_386_JUMP_SLOT:
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TRACE ("BFD_RELOC_386_JUMP_SLOT");
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return &elf_howto_table[R_386_JUMP_SLOT];
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case BFD_RELOC_386_RELATIVE:
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TRACE ("BFD_RELOC_386_RELATIVE");
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return &elf_howto_table[R_386_RELATIVE];
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case BFD_RELOC_386_GOTOFF:
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TRACE ("BFD_RELOC_386_GOTOFF");
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return &elf_howto_table[R_386_GOTOFF];
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case BFD_RELOC_386_GOTPC:
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TRACE ("BFD_RELOC_386_GOTPC");
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return &elf_howto_table[R_386_GOTPC];
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/* These relocs are a GNU extension. */
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case BFD_RELOC_386_TLS_TPOFF:
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TRACE ("BFD_RELOC_386_TLS_TPOFF");
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return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
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case BFD_RELOC_386_TLS_IE:
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TRACE ("BFD_RELOC_386_TLS_IE");
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return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
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case BFD_RELOC_386_TLS_GOTIE:
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TRACE ("BFD_RELOC_386_TLS_GOTIE");
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return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
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case BFD_RELOC_386_TLS_LE:
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TRACE ("BFD_RELOC_386_TLS_LE");
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return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
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case BFD_RELOC_386_TLS_GD:
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TRACE ("BFD_RELOC_386_TLS_GD");
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return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
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case BFD_RELOC_386_TLS_LDM:
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TRACE ("BFD_RELOC_386_TLS_LDM");
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return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
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case BFD_RELOC_16:
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TRACE ("BFD_RELOC_16");
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return &elf_howto_table[R_386_16 - R_386_ext_offset];
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case BFD_RELOC_16_PCREL:
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TRACE ("BFD_RELOC_16_PCREL");
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return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
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case BFD_RELOC_8:
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TRACE ("BFD_RELOC_8");
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return &elf_howto_table[R_386_8 - R_386_ext_offset];
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case BFD_RELOC_8_PCREL:
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TRACE ("BFD_RELOC_8_PCREL");
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return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
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/* Common with Sun TLS implementation. */
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case BFD_RELOC_386_TLS_LDO_32:
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TRACE ("BFD_RELOC_386_TLS_LDO_32");
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return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
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case BFD_RELOC_386_TLS_IE_32:
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TRACE ("BFD_RELOC_386_TLS_IE_32");
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return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
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case BFD_RELOC_386_TLS_LE_32:
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TRACE ("BFD_RELOC_386_TLS_LE_32");
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return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
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case BFD_RELOC_386_TLS_DTPMOD32:
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TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
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return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
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case BFD_RELOC_386_TLS_DTPOFF32:
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TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
|
||
return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_386_TLS_TPOFF32:
|
||
TRACE ("BFD_RELOC_386_TLS_TPOFF32");
|
||
return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_SIZE32:
|
||
TRACE ("BFD_RELOC_SIZE32");
|
||
return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_386_TLS_GOTDESC:
|
||
TRACE ("BFD_RELOC_386_TLS_GOTDESC");
|
||
return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_386_TLS_DESC_CALL:
|
||
TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
|
||
return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_386_TLS_DESC:
|
||
TRACE ("BFD_RELOC_386_TLS_DESC");
|
||
return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_386_IRELATIVE:
|
||
TRACE ("BFD_RELOC_386_IRELATIVE");
|
||
return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_386_GOT32X:
|
||
TRACE ("BFD_RELOC_386_GOT32X");
|
||
return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
|
||
|
||
case BFD_RELOC_VTABLE_INHERIT:
|
||
TRACE ("BFD_RELOC_VTABLE_INHERIT");
|
||
return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
|
||
|
||
case BFD_RELOC_VTABLE_ENTRY:
|
||
TRACE ("BFD_RELOC_VTABLE_ENTRY");
|
||
return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
|
||
|
||
default:
|
||
TRACE ("Unknown");
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
|
||
abfd, (int) code);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
|
||
if (elf_howto_table[i].name != NULL
|
||
&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
|
||
return &elf_howto_table[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
elf_i386_rtype_to_howto (unsigned r_type)
|
||
{
|
||
unsigned int indx;
|
||
|
||
if ((indx = r_type) >= R_386_standard
|
||
&& ((indx = r_type - R_386_ext_offset) - R_386_standard
|
||
>= R_386_ext - R_386_standard)
|
||
&& ((indx = r_type - R_386_tls_offset) - R_386_ext
|
||
>= R_386_ext2 - R_386_ext)
|
||
&& ((indx = r_type - R_386_vt_offset) - R_386_ext2
|
||
>= R_386_vt - R_386_ext2))
|
||
return NULL;
|
||
/* PR 17512: file: 0f67f69d. */
|
||
if (elf_howto_table [indx].type != r_type)
|
||
return NULL;
|
||
return &elf_howto_table[indx];
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf_i386_info_to_howto_rel (bfd *abfd,
|
||
arelent *cache_ptr,
|
||
Elf_Internal_Rela *dst)
|
||
{
|
||
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
||
if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL)
|
||
{
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
|
||
abfd, r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return whether a symbol name implies a local label. The UnixWare
|
||
2.1 cc generates temporary symbols that start with .X, so we
|
||
recognize them here. FIXME: do other SVR4 compilers also use .X?.
|
||
If so, we should move the .X recognition into
|
||
_bfd_elf_is_local_label_name. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_is_local_label_name (bfd *abfd, const char *name)
|
||
{
|
||
if (name[0] == '.' && name[1] == 'X')
|
||
return TRUE;
|
||
|
||
return _bfd_elf_is_local_label_name (abfd, name);
|
||
}
|
||
|
||
/* Support for core dump NOTE sections. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
|
||
{
|
||
int offset;
|
||
size_t size;
|
||
|
||
if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
|
||
{
|
||
int pr_version = bfd_get_32 (abfd, note->descdata);
|
||
|
||
if (pr_version != 1)
|
||
return FALSE;
|
||
|
||
/* pr_cursig */
|
||
elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
|
||
|
||
/* pr_pid */
|
||
elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
|
||
|
||
/* pr_reg */
|
||
offset = 28;
|
||
size = bfd_get_32 (abfd, note->descdata + 8);
|
||
}
|
||
else
|
||
{
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 144: /* Linux/i386 */
|
||
/* 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 + 24);
|
||
|
||
/* pr_reg */
|
||
offset = 72;
|
||
size = 68;
|
||
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Make a ".reg/999" section. */
|
||
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
||
size, note->descpos + offset);
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
|
||
{
|
||
if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
|
||
{
|
||
int pr_version = bfd_get_32 (abfd, note->descdata);
|
||
|
||
if (pr_version != 1)
|
||
return FALSE;
|
||
|
||
elf_tdata (abfd)->core->program
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
|
||
elf_tdata (abfd)->core->command
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
|
||
}
|
||
else
|
||
{
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 124: /* Linux/i386 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 (0 < n && command[n - 1] == ' ')
|
||
command[n - 1] = '\0';
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Functions for the i386 ELF linker.
|
||
|
||
In order to gain some understanding of code in this file without
|
||
knowing all the intricate details of the linker, note the
|
||
following:
|
||
|
||
Functions named elf_i386_* are called by external routines, other
|
||
functions are only called locally. elf_i386_* functions appear
|
||
in this file more or less in the order in which they are called
|
||
from external routines. eg. elf_i386_check_relocs is called
|
||
early in the link process, elf_i386_finish_dynamic_sections is
|
||
one of the last functions. */
|
||
|
||
/* The size in bytes of an entry in the lazy procedure linkage table. */
|
||
|
||
#define LAZY_PLT_ENTRY_SIZE 16
|
||
|
||
/* The size in bytes of an entry in the non-lazy procedure linkage
|
||
table. */
|
||
|
||
#define NON_LAZY_PLT_ENTRY_SIZE 8
|
||
|
||
/* The first entry in an absolute lazy procedure linkage table looks
|
||
like this. See the SVR4 ABI i386 supplement to see how this works.
|
||
Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
|
||
|
||
static const bfd_byte elf_i386_lazy_plt0_entry[12] =
|
||
{
|
||
0xff, 0x35, /* pushl contents of address */
|
||
0, 0, 0, 0, /* replaced with address of .got + 4. */
|
||
0xff, 0x25, /* jmp indirect */
|
||
0, 0, 0, 0 /* replaced with address of .got + 8. */
|
||
};
|
||
|
||
/* Subsequent entries in an absolute lazy procedure linkage table look
|
||
like this. */
|
||
|
||
static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xff, 0x25, /* jmp indirect */
|
||
0, 0, 0, 0, /* replaced with address of this symbol in .got. */
|
||
0x68, /* pushl immediate */
|
||
0, 0, 0, 0, /* replaced with offset into relocation table. */
|
||
0xe9, /* jmp relative */
|
||
0, 0, 0, 0 /* replaced with offset to start of .plt. */
|
||
};
|
||
|
||
/* The first entry in a PIC lazy procedure linkage table look like
|
||
this. Will be padded to LAZY_PLT_ENTRY_SIZE with
|
||
lazy_plt->plt0_pad_byte. */
|
||
|
||
static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
|
||
{
|
||
0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
|
||
0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
|
||
};
|
||
|
||
/* Subsequent entries in a PIC lazy procedure linkage table look like
|
||
this. */
|
||
|
||
static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xff, 0xa3, /* jmp *offset(%ebx) */
|
||
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
|
||
0x68, /* pushl immediate */
|
||
0, 0, 0, 0, /* replaced with offset into relocation table. */
|
||
0xe9, /* jmp relative */
|
||
0, 0, 0, 0 /* replaced with offset to start of .plt. */
|
||
};
|
||
|
||
/* Entries in the non-lazy procedure linkage table look like this. */
|
||
|
||
static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xff, 0x25, /* jmp indirect */
|
||
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
|
||
0x66, 0x90 /* xchg %ax,%ax */
|
||
};
|
||
|
||
/* Entries in the PIC non-lazy procedure linkage table look like
|
||
this. */
|
||
|
||
static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xff, 0xa3, /* jmp *offset(%ebx) */
|
||
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
|
||
0x66, 0x90 /* xchg %ax,%ax */
|
||
};
|
||
|
||
/* The first entry in an absolute IBT-enabled lazy procedure linkage
|
||
table looks like this. */
|
||
|
||
static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
|
||
0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
|
||
0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
|
||
};
|
||
|
||
/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
|
||
table look like this. Subsequent entries for a PIC IBT-enabled lazy
|
||
procedure linkage table are the same. */
|
||
|
||
static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
|
||
0x68, 0, 0, 0, 0, /* pushl immediate */
|
||
0xe9, 0, 0, 0, 0, /* jmp relative */
|
||
0x66, 0x90 /* xchg %ax,%ax */
|
||
};
|
||
|
||
/* The first entry in a PIC IBT-enabled lazy procedure linkage table
|
||
look like. */
|
||
|
||
static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
|
||
0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
|
||
0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
|
||
};
|
||
|
||
/* Entries for branches with IBT-enabled in the absolute non-lazey
|
||
procedure linkage table look like this. They have the same size
|
||
as the lazy PLT entry. */
|
||
|
||
static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
|
||
0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
|
||
0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
|
||
};
|
||
|
||
/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
|
||
linkage table look like this. They have the same size as the lazy
|
||
PLT entry. */
|
||
|
||
static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
|
||
{
|
||
0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
|
||
0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
|
||
0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
|
||
};
|
||
|
||
/* .eh_frame covering the lazy .plt section. */
|
||
|
||
static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
|
||
{
|
||
PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
|
||
0, 0, 0, 0, /* CIE ID */
|
||
1, /* CIE version */
|
||
'z', 'R', 0, /* Augmentation string */
|
||
1, /* Code alignment factor */
|
||
0x7c, /* Data alignment factor */
|
||
8, /* Return address column */
|
||
1, /* Augmentation size */
|
||
DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
|
||
DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
|
||
DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
|
||
DW_CFA_nop, DW_CFA_nop,
|
||
|
||
PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
|
||
PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
|
||
0, 0, 0, 0, /* R_386_PC32 .plt goes here */
|
||
0, 0, 0, 0, /* .plt size goes here */
|
||
0, /* Augmentation size */
|
||
DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
|
||
DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
|
||
DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
|
||
DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
|
||
DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
|
||
11, /* Block length */
|
||
DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
|
||
DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
|
||
DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
|
||
DW_OP_lit2, DW_OP_shl, DW_OP_plus,
|
||
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
|
||
};
|
||
|
||
/* .eh_frame covering the lazy .plt section with IBT-enabled. */
|
||
|
||
static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
|
||
{
|
||
PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
|
||
0, 0, 0, 0, /* CIE ID */
|
||
1, /* CIE version */
|
||
'z', 'R', 0, /* Augmentation string */
|
||
1, /* Code alignment factor */
|
||
0x7c, /* Data alignment factor */
|
||
8, /* Return address column */
|
||
1, /* Augmentation size */
|
||
DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
|
||
DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
|
||
DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
|
||
DW_CFA_nop, DW_CFA_nop,
|
||
|
||
PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
|
||
PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
|
||
0, 0, 0, 0, /* R_386_PC32 .plt goes here */
|
||
0, 0, 0, 0, /* .plt size goes here */
|
||
0, /* Augmentation size */
|
||
DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
|
||
DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
|
||
DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
|
||
DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
|
||
DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
|
||
11, /* Block length */
|
||
DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
|
||
DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
|
||
DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
|
||
DW_OP_lit2, DW_OP_shl, DW_OP_plus,
|
||
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
|
||
};
|
||
|
||
/* .eh_frame covering the non-lazy .plt section. */
|
||
|
||
static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
|
||
{
|
||
#define PLT_GOT_FDE_LENGTH 16
|
||
PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
|
||
0, 0, 0, 0, /* CIE ID */
|
||
1, /* CIE version */
|
||
'z', 'R', 0, /* Augmentation string */
|
||
1, /* Code alignment factor */
|
||
0x7c, /* Data alignment factor */
|
||
8, /* Return address column */
|
||
1, /* Augmentation size */
|
||
DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
|
||
DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
|
||
DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
|
||
DW_CFA_nop, DW_CFA_nop,
|
||
|
||
PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
|
||
PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
|
||
0, 0, 0, 0, /* the start of non-lazy .plt goes here */
|
||
0, 0, 0, 0, /* non-lazy .plt size goes here */
|
||
0, /* Augmentation size */
|
||
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
|
||
};
|
||
|
||
/* These are the standard parameters. */
|
||
static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
|
||
{
|
||
elf_i386_lazy_plt0_entry, /* plt0_entry */
|
||
sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
|
||
elf_i386_lazy_plt_entry, /* plt_entry */
|
||
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
|
||
NULL, /* plt_tlsdesc_entry */
|
||
0, /* plt_tlsdesc_entry_size*/
|
||
0, /* plt_tlsdesc_got1_offset */
|
||
0, /* plt_tlsdesc_got2_offset */
|
||
0, /* plt_tlsdesc_got1_insn_end */
|
||
0, /* plt_tlsdesc_got2_insn_end */
|
||
2, /* plt0_got1_offset */
|
||
8, /* plt0_got2_offset */
|
||
0, /* plt0_got2_insn_end */
|
||
2, /* plt_got_offset */
|
||
7, /* plt_reloc_offset */
|
||
12, /* plt_plt_offset */
|
||
0, /* plt_got_insn_size */
|
||
0, /* plt_plt_insn_end */
|
||
6, /* plt_lazy_offset */
|
||
elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
|
||
elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
|
||
elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
|
||
sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
|
||
};
|
||
|
||
static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
|
||
{
|
||
elf_i386_non_lazy_plt_entry, /* plt_entry */
|
||
elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
|
||
NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
|
||
2, /* plt_got_offset */
|
||
0, /* plt_got_insn_size */
|
||
elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
|
||
sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
|
||
};
|
||
|
||
static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
|
||
{
|
||
elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
|
||
sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
|
||
elf_i386_lazy_ibt_plt_entry, /* plt_entry */
|
||
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
|
||
NULL, /* plt_tlsdesc_entry */
|
||
0, /* plt_tlsdesc_entry_size*/
|
||
0, /* plt_tlsdesc_got1_offset */
|
||
0, /* plt_tlsdesc_got2_offset */
|
||
0, /* plt_tlsdesc_got1_insn_end */
|
||
0, /* plt_tlsdesc_got2_insn_end */
|
||
2, /* plt0_got1_offset */
|
||
8, /* plt0_got2_offset */
|
||
0, /* plt0_got2_insn_end */
|
||
4+2, /* plt_got_offset */
|
||
4+1, /* plt_reloc_offset */
|
||
4+6, /* plt_plt_offset */
|
||
0, /* plt_got_insn_size */
|
||
0, /* plt_plt_insn_end */
|
||
0, /* plt_lazy_offset */
|
||
elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
|
||
elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
|
||
elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
|
||
sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
|
||
};
|
||
|
||
static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
|
||
{
|
||
elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
|
||
elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
|
||
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
|
||
4+2, /* plt_got_offset */
|
||
0, /* plt_got_insn_size */
|
||
elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
|
||
sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
|
||
};
|
||
|
||
|
||
/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
|
||
for the PLTResolve stub and then for each PLT entry. */
|
||
#define PLTRESOLVE_RELOCS_SHLIB 0
|
||
#define PLTRESOLVE_RELOCS 2
|
||
#define PLT_NON_JUMP_SLOT_RELOCS 2
|
||
|
||
/* Return TRUE if the TLS access code sequence support transition
|
||
from R_TYPE. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_check_tls_transition (asection *sec,
|
||
bfd_byte *contents,
|
||
Elf_Internal_Shdr *symtab_hdr,
|
||
struct elf_link_hash_entry **sym_hashes,
|
||
unsigned int r_type,
|
||
const Elf_Internal_Rela *rel,
|
||
const Elf_Internal_Rela *relend)
|
||
{
|
||
unsigned int val, type, reg;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma offset;
|
||
bfd_byte *call;
|
||
bfd_boolean indirect_call;
|
||
|
||
offset = rel->r_offset;
|
||
switch (r_type)
|
||
{
|
||
case R_386_TLS_GD:
|
||
case R_386_TLS_LDM:
|
||
if (offset < 2 || (rel + 1) >= relend)
|
||
return FALSE;
|
||
|
||
indirect_call = FALSE;
|
||
call = contents + offset + 4;
|
||
val = *(call - 5);
|
||
type = *(call - 6);
|
||
if (r_type == R_386_TLS_GD)
|
||
{
|
||
/* Check transition from GD access model. Only
|
||
leal foo@tlsgd(,%ebx,1), %eax
|
||
call ___tls_get_addr@PLT
|
||
or
|
||
leal foo@tlsgd(%ebx) %eax
|
||
call ___tls_get_addr@PLT
|
||
nop
|
||
or
|
||
leal foo@tlsgd(%reg), %eax
|
||
call *___tls_get_addr@GOT(%reg)
|
||
which may be converted to
|
||
addr32 call ___tls_get_addr
|
||
can transit to different access model. */
|
||
if ((offset + 10) > sec->size
|
||
|| (type != 0x8d && type != 0x04))
|
||
return FALSE;
|
||
|
||
if (type == 0x04)
|
||
{
|
||
/* leal foo@tlsgd(,%ebx,1), %eax
|
||
call ___tls_get_addr@PLT */
|
||
if (offset < 3)
|
||
return FALSE;
|
||
|
||
if (*(call - 7) != 0x8d
|
||
|| val != 0x1d
|
||
|| call[0] != 0xe8)
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
/* This must be
|
||
leal foo@tlsgd(%ebx), %eax
|
||
call ___tls_get_addr@PLT
|
||
nop
|
||
or
|
||
leal foo@tlsgd(%reg), %eax
|
||
call *___tls_get_addr@GOT(%reg)
|
||
which may be converted to
|
||
addr32 call ___tls_get_addr
|
||
|
||
%eax can't be used as the GOT base register since it
|
||
is used to pass parameter to ___tls_get_addr. */
|
||
reg = val & 7;
|
||
if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
|
||
return FALSE;
|
||
|
||
indirect_call = call[0] == 0xff;
|
||
if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
|
||
&& !(call[0] == 0x67 && call[1] == 0xe8)
|
||
&& !(indirect_call
|
||
&& (call[1] & 0xf8) == 0x90
|
||
&& (call[1] & 0x7) == reg))
|
||
return FALSE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Check transition from LD access model. Only
|
||
leal foo@tlsldm(%ebx), %eax
|
||
call ___tls_get_addr@PLT
|
||
or
|
||
leal foo@tlsldm(%reg), %eax
|
||
call *___tls_get_addr@GOT(%reg)
|
||
which may be converted to
|
||
addr32 call ___tls_get_addr
|
||
can transit to different access model. */
|
||
if (type != 0x8d || (offset + 9) > sec->size)
|
||
return FALSE;
|
||
|
||
/* %eax can't be used as the GOT base register since it is
|
||
used to pass parameter to ___tls_get_addr. */
|
||
reg = val & 7;
|
||
if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
|
||
return FALSE;
|
||
|
||
indirect_call = call[0] == 0xff;
|
||
if (!(reg == 3 && call[0] == 0xe8)
|
||
&& !(call[0] == 0x67 && call[1] == 0xe8)
|
||
&& !(indirect_call
|
||
&& (call[1] & 0xf8) == 0x90
|
||
&& (call[1] & 0x7) == reg))
|
||
return FALSE;
|
||
}
|
||
|
||
r_symndx = ELF32_R_SYM (rel[1].r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
return FALSE;
|
||
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h == NULL
|
||
|| !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
|
||
return FALSE;
|
||
else if (indirect_call)
|
||
return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
|
||
else
|
||
return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
|
||
|| ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
|
||
|
||
case R_386_TLS_IE:
|
||
/* Check transition from IE access model:
|
||
movl foo@indntpoff(%rip), %eax
|
||
movl foo@indntpoff(%rip), %reg
|
||
addl foo@indntpoff(%rip), %reg
|
||
*/
|
||
|
||
if (offset < 1 || (offset + 4) > sec->size)
|
||
return FALSE;
|
||
|
||
/* Check "movl foo@tpoff(%rip), %eax" first. */
|
||
val = bfd_get_8 (abfd, contents + offset - 1);
|
||
if (val == 0xa1)
|
||
return TRUE;
|
||
|
||
if (offset < 2)
|
||
return FALSE;
|
||
|
||
/* Check movl|addl foo@tpoff(%rip), %reg. */
|
||
type = bfd_get_8 (abfd, contents + offset - 2);
|
||
return ((type == 0x8b || type == 0x03)
|
||
&& (val & 0xc7) == 0x05);
|
||
|
||
case R_386_TLS_GOTIE:
|
||
case R_386_TLS_IE_32:
|
||
/* Check transition from {IE_32,GOTIE} access model:
|
||
subl foo@{tpoff,gontoff}(%reg1), %reg2
|
||
movl foo@{tpoff,gontoff}(%reg1), %reg2
|
||
addl foo@{tpoff,gontoff}(%reg1), %reg2
|
||
*/
|
||
|
||
if (offset < 2 || (offset + 4) > sec->size)
|
||
return FALSE;
|
||
|
||
val = bfd_get_8 (abfd, contents + offset - 1);
|
||
if ((val & 0xc0) != 0x80 || (val & 7) == 4)
|
||
return FALSE;
|
||
|
||
type = bfd_get_8 (abfd, contents + offset - 2);
|
||
return type == 0x8b || type == 0x2b || type == 0x03;
|
||
|
||
case R_386_TLS_GOTDESC:
|
||
/* Check transition from GDesc access model:
|
||
leal x@tlsdesc(%ebx), %eax
|
||
|
||
Make sure it's a leal adding ebx to a 32-bit offset
|
||
into any register, although it's probably almost always
|
||
going to be eax. */
|
||
|
||
if (offset < 2 || (offset + 4) > sec->size)
|
||
return FALSE;
|
||
|
||
if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
|
||
return FALSE;
|
||
|
||
val = bfd_get_8 (abfd, contents + offset - 1);
|
||
return (val & 0xc7) == 0x83;
|
||
|
||
case R_386_TLS_DESC_CALL:
|
||
/* Check transition from GDesc access model:
|
||
call *x@tlsdesc(%eax)
|
||
*/
|
||
if (offset + 2 <= sec->size)
|
||
{
|
||
/* Make sure that it's a call *x@tlsdesc(%eax). */
|
||
call = contents + offset;
|
||
return call[0] == 0xff && call[1] == 0x10;
|
||
}
|
||
|
||
return FALSE;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
/* Return TRUE if the TLS access transition is OK or no transition
|
||
will be performed. Update R_TYPE if there is a transition. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
|
||
asection *sec, bfd_byte *contents,
|
||
Elf_Internal_Shdr *symtab_hdr,
|
||
struct elf_link_hash_entry **sym_hashes,
|
||
unsigned int *r_type, int tls_type,
|
||
const Elf_Internal_Rela *rel,
|
||
const Elf_Internal_Rela *relend,
|
||
struct elf_link_hash_entry *h,
|
||
unsigned long r_symndx,
|
||
bfd_boolean from_relocate_section)
|
||
{
|
||
unsigned int from_type = *r_type;
|
||
unsigned int to_type = from_type;
|
||
bfd_boolean check = TRUE;
|
||
|
||
/* Skip TLS transition for functions. */
|
||
if (h != NULL
|
||
&& (h->type == STT_FUNC
|
||
|| h->type == STT_GNU_IFUNC))
|
||
return TRUE;
|
||
|
||
switch (from_type)
|
||
{
|
||
case R_386_TLS_GD:
|
||
case R_386_TLS_GOTDESC:
|
||
case R_386_TLS_DESC_CALL:
|
||
case R_386_TLS_IE_32:
|
||
case R_386_TLS_IE:
|
||
case R_386_TLS_GOTIE:
|
||
if (bfd_link_executable (info))
|
||
{
|
||
if (h == NULL)
|
||
to_type = R_386_TLS_LE_32;
|
||
else if (from_type != R_386_TLS_IE
|
||
&& from_type != R_386_TLS_GOTIE)
|
||
to_type = R_386_TLS_IE_32;
|
||
}
|
||
|
||
/* When we are called from elf_i386_relocate_section, there may
|
||
be additional transitions based on TLS_TYPE. */
|
||
if (from_relocate_section)
|
||
{
|
||
unsigned int new_to_type = to_type;
|
||
|
||
if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
|
||
new_to_type = R_386_TLS_LE_32;
|
||
|
||
if (to_type == R_386_TLS_GD
|
||
|| to_type == R_386_TLS_GOTDESC
|
||
|| to_type == R_386_TLS_DESC_CALL)
|
||
{
|
||
if (tls_type == GOT_TLS_IE_POS)
|
||
new_to_type = R_386_TLS_GOTIE;
|
||
else if (tls_type & GOT_TLS_IE)
|
||
new_to_type = R_386_TLS_IE_32;
|
||
}
|
||
|
||
/* We checked the transition before when we were called from
|
||
elf_i386_check_relocs. We only want to check the new
|
||
transition which hasn't been checked before. */
|
||
check = new_to_type != to_type && from_type == to_type;
|
||
to_type = new_to_type;
|
||
}
|
||
|
||
break;
|
||
|
||
case R_386_TLS_LDM:
|
||
if (bfd_link_executable (info))
|
||
to_type = R_386_TLS_LE_32;
|
||
break;
|
||
|
||
default:
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return TRUE if there is no transition. */
|
||
if (from_type == to_type)
|
||
return TRUE;
|
||
|
||
/* Check if the transition can be performed. */
|
||
if (check
|
||
&& ! elf_i386_check_tls_transition (sec, contents,
|
||
symtab_hdr, sym_hashes,
|
||
from_type, rel, relend))
|
||
{
|
||
reloc_howto_type *from, *to;
|
||
const char *name;
|
||
|
||
from = elf_i386_rtype_to_howto (from_type);
|
||
to = elf_i386_rtype_to_howto (to_type);
|
||
|
||
if (h)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
struct elf_x86_link_hash_table *htab;
|
||
|
||
htab = elf_x86_hash_table (info, I386_ELF_DATA);
|
||
if (htab == NULL)
|
||
name = "*unknown*";
|
||
else
|
||
{
|
||
Elf_Internal_Sym *isym;
|
||
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
|
||
abfd, r_symndx);
|
||
name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
|
||
}
|
||
}
|
||
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: TLS transition from %s to %s against `%s'"
|
||
" at %#" PRIx64 " in section `%pA' failed"),
|
||
abfd, from->name, to->name, name,
|
||
(uint64_t) rel->r_offset, sec);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
*r_type = to_type;
|
||
return TRUE;
|
||
}
|
||
|
||
/* With the local symbol, foo, we convert
|
||
mov foo@GOT[(%reg1)], %reg2
|
||
to
|
||
lea foo[@GOTOFF(%reg1)], %reg2
|
||
and convert
|
||
call/jmp *foo@GOT[(%reg)]
|
||
to
|
||
nop call foo/jmp foo nop
|
||
When PIC is false, convert
|
||
test %reg1, foo@GOT[(%reg2)]
|
||
to
|
||
test $foo, %reg1
|
||
and convert
|
||
binop foo@GOT[(%reg1)], %reg2
|
||
to
|
||
binop $foo, %reg2
|
||
where binop is one of adc, add, and, cmp, or, sbb, sub, xor
|
||
instructions. */
|
||
|
||
static
|
||
bfd_boolean
|
||
elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
|
||
bfd_byte *contents,
|
||
unsigned int *r_type_p,
|
||
Elf_Internal_Rela *irel,
|
||
struct elf_link_hash_entry *h,
|
||
bfd_boolean *converted,
|
||
struct bfd_link_info *link_info)
|
||
{
|
||
struct elf_x86_link_hash_table *htab;
|
||
unsigned int opcode;
|
||
unsigned int modrm;
|
||
bfd_boolean baseless;
|
||
Elf_Internal_Sym *isym;
|
||
unsigned int addend;
|
||
unsigned int nop;
|
||
bfd_vma nop_offset;
|
||
bfd_boolean is_pic;
|
||
bfd_boolean to_reloc_32;
|
||
bfd_boolean abs_symbol;
|
||
unsigned int r_type;
|
||
unsigned int r_symndx;
|
||
bfd_vma roff = irel->r_offset;
|
||
bfd_boolean local_ref;
|
||
struct elf_x86_link_hash_entry *eh;
|
||
|
||
if (roff < 2)
|
||
return TRUE;
|
||
|
||
/* Addend for R_386_GOT32X relocations must be 0. */
|
||
addend = bfd_get_32 (abfd, contents + roff);
|
||
if (addend != 0)
|
||
return TRUE;
|
||
|
||
htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
|
||
is_pic = bfd_link_pic (link_info);
|
||
|
||
r_type = *r_type_p;
|
||
r_symndx = ELF32_R_SYM (irel->r_info);
|
||
|
||
modrm = bfd_get_8 (abfd, contents + roff - 1);
|
||
baseless = (modrm & 0xc7) == 0x5;
|
||
|
||
if (h)
|
||
{
|
||
/* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
|
||
local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
|
||
isym = NULL;
|
||
abs_symbol = ABS_SYMBOL_P (h);
|
||
}
|
||
else
|
||
{
|
||
local_ref = TRUE;
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd,
|
||
r_symndx);
|
||
abs_symbol = isym->st_shndx == SHN_ABS;
|
||
}
|
||
|
||
if (baseless && is_pic)
|
||
{
|
||
/* For PIC, disallow R_386_GOT32X without a base register
|
||
since we don't know what the GOT base is. */
|
||
const char *name;
|
||
|
||
if (h == NULL)
|
||
name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
|
||
else
|
||
name = h->root.root.string;
|
||
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
|
||
" register can not be used when making a shared object"),
|
||
abfd, name);
|
||
return FALSE;
|
||
}
|
||
|
||
opcode = bfd_get_8 (abfd, contents + roff - 2);
|
||
|
||
/* Convert to R_386_32 if PIC is false or there is no base
|
||
register. */
|
||
to_reloc_32 = !is_pic || baseless;
|
||
|
||
eh = elf_x86_hash_entry (h);
|
||
|
||
/* Try to convert R_386_GOT32X. Get the symbol referred to by the
|
||
reloc. */
|
||
if (h == NULL)
|
||
{
|
||
if (opcode == 0x0ff)
|
||
/* Convert "call/jmp *foo@GOT[(%reg)]". */
|
||
goto convert_branch;
|
||
else
|
||
/* Convert "mov foo@GOT[(%reg1)], %reg2",
|
||
"test %reg1, foo@GOT(%reg2)" and
|
||
"binop foo@GOT[(%reg1)], %reg2". */
|
||
goto convert_load;
|
||
}
|
||
|
||
/* Undefined weak symbol is only bound locally in executable
|
||
and its reference is resolved as 0. */
|
||
if (h->root.type == bfd_link_hash_undefweak
|
||
&& !eh->linker_def
|
||
&& local_ref)
|
||
{
|
||
if (opcode == 0xff)
|
||
{
|
||
/* No direct branch to 0 for PIC. */
|
||
if (is_pic)
|
||
return TRUE;
|
||
else
|
||
goto convert_branch;
|
||
}
|
||
else
|
||
{
|
||
/* We can convert load of address 0 to R_386_32. */
|
||
to_reloc_32 = TRUE;
|
||
goto convert_load;
|
||
}
|
||
}
|
||
|
||
if (opcode == 0xff)
|
||
{
|
||
/* We have "call/jmp *foo@GOT[(%reg)]". */
|
||
if ((h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& local_ref)
|
||
{
|
||
/* The function is locally defined. */
|
||
convert_branch:
|
||
/* Convert R_386_GOT32X to R_386_PC32. */
|
||
if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
|
||
{
|
||
/* Convert to "nop call foo". ADDR_PREFIX_OPCODE
|
||
is a nop prefix. */
|
||
modrm = 0xe8;
|
||
/* To support TLS optimization, always use addr32 prefix
|
||
for "call *___tls_get_addr@GOT(%reg)". */
|
||
if (eh && eh->tls_get_addr)
|
||
{
|
||
nop = 0x67;
|
||
nop_offset = irel->r_offset - 2;
|
||
}
|
||
else
|
||
{
|
||
nop = htab->params->call_nop_byte;
|
||
if (htab->params->call_nop_as_suffix)
|
||
{
|
||
nop_offset = roff + 3;
|
||
irel->r_offset -= 1;
|
||
}
|
||
else
|
||
nop_offset = roff - 2;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Convert to "jmp foo nop". */
|
||
modrm = 0xe9;
|
||
nop = NOP_OPCODE;
|
||
nop_offset = roff + 3;
|
||
irel->r_offset -= 1;
|
||
}
|
||
|
||
bfd_put_8 (abfd, nop, contents + nop_offset);
|
||
bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
|
||
/* When converting to PC-relative relocation, we
|
||
need to adjust addend by -4. */
|
||
bfd_put_32 (abfd, -4, contents + irel->r_offset);
|
||
irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
|
||
*r_type_p = R_386_PC32;
|
||
*converted = TRUE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We have "mov foo@GOT[(%re1g)], %reg2",
|
||
"test %reg1, foo@GOT(%reg2)" and
|
||
"binop foo@GOT[(%reg1)], %reg2".
|
||
|
||
Avoid optimizing _DYNAMIC since ld.so may use its
|
||
link-time address. */
|
||
if (h == htab->elf.hdynamic)
|
||
return TRUE;
|
||
|
||
/* def_regular is set by an assignment in a linker script in
|
||
bfd_elf_record_link_assignment. start_stop is set on
|
||
__start_SECNAME/__stop_SECNAME which mark section SECNAME. */
|
||
if (h->start_stop
|
||
|| eh->linker_def
|
||
|| ((h->def_regular
|
||
|| h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& local_ref))
|
||
{
|
||
convert_load:
|
||
if (opcode == 0x8b)
|
||
{
|
||
if (abs_symbol && local_ref)
|
||
to_reloc_32 = TRUE;
|
||
|
||
if (to_reloc_32)
|
||
{
|
||
/* Convert "mov foo@GOT[(%reg1)], %reg2" to
|
||
"mov $foo, %reg2" with R_386_32. */
|
||
r_type = R_386_32;
|
||
modrm = 0xc0 | (modrm & 0x38) >> 3;
|
||
bfd_put_8 (abfd, modrm, contents + roff - 1);
|
||
opcode = 0xc7;
|
||
}
|
||
else
|
||
{
|
||
/* Convert "mov foo@GOT(%reg1), %reg2" to
|
||
"lea foo@GOTOFF(%reg1), %reg2". */
|
||
r_type = R_386_GOTOFF;
|
||
opcode = 0x8d;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Only R_386_32 is supported. */
|
||
if (!to_reloc_32)
|
||
return TRUE;
|
||
|
||
if (opcode == 0x85)
|
||
{
|
||
/* Convert "test %reg1, foo@GOT(%reg2)" to
|
||
"test $foo, %reg1". */
|
||
modrm = 0xc0 | (modrm & 0x38) >> 3;
|
||
opcode = 0xf7;
|
||
}
|
||
else
|
||
{
|
||
/* Convert "binop foo@GOT(%reg1), %reg2" to
|
||
"binop $foo, %reg2". */
|
||
modrm = (0xc0
|
||
| (modrm & 0x38) >> 3
|
||
| (opcode & 0x3c));
|
||
opcode = 0x81;
|
||
}
|
||
bfd_put_8 (abfd, modrm, contents + roff - 1);
|
||
r_type = R_386_32;
|
||
}
|
||
|
||
bfd_put_8 (abfd, opcode, contents + roff - 2);
|
||
irel->r_info = ELF32_R_INFO (r_symndx, r_type);
|
||
*r_type_p = r_type;
|
||
*converted = TRUE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Rename some of the generic section flags to better document how they
|
||
are used here. */
|
||
#define check_relocs_failed sec_flg0
|
||
|
||
/* Look through the relocs for a section during the first phase, and
|
||
calculate needed space in the global offset table, procedure linkage
|
||
table, and dynamic reloc sections. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_check_relocs (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
const Elf_Internal_Rela *relocs)
|
||
{
|
||
struct elf_x86_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sreloc;
|
||
bfd_byte *contents;
|
||
bfd_boolean converted;
|
||
|
||
if (bfd_link_relocatable (info))
|
||
return TRUE;
|
||
|
||
htab = elf_x86_hash_table (info, I386_ELF_DATA);
|
||
if (htab == NULL)
|
||
{
|
||
sec->check_relocs_failed = 1;
|
||
return FALSE;
|
||
}
|
||
|
||
BFD_ASSERT (is_x86_elf (abfd, htab));
|
||
|
||
/* Get the section contents. */
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
||
{
|
||
sec->check_relocs_failed = 1;
|
||
return FALSE;
|
||
}
|
||
|
||
symtab_hdr = &elf_symtab_hdr (abfd);
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
|
||
converted = FALSE;
|
||
|
||
sreloc = NULL;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
unsigned int r_type;
|
||
unsigned int r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
struct elf_x86_link_hash_entry *eh;
|
||
Elf_Internal_Sym *isym;
|
||
const char *name;
|
||
bfd_boolean size_reloc;
|
||
bfd_boolean no_dynreloc;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
||
{
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: bad symbol index: %d"),
|
||
abfd, r_symndx);
|
||
goto error_return;
|
||
}
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
|
||
abfd, r_symndx);
|
||
if (isym == NULL)
|
||
goto error_return;
|
||
|
||
/* Check relocation against local STT_GNU_IFUNC symbol. */
|
||
if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
|
||
{
|
||
h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
|
||
if (h == NULL)
|
||
goto error_return;
|
||
|
||
/* Fake a STT_GNU_IFUNC symbol. */
|
||
h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
|
||
isym, NULL);
|
||
h->type = STT_GNU_IFUNC;
|
||
h->def_regular = 1;
|
||
h->ref_regular = 1;
|
||
h->forced_local = 1;
|
||
h->root.type = bfd_link_hash_defined;
|
||
}
|
||
else
|
||
h = NULL;
|
||
}
|
||
else
|
||
{
|
||
isym = NULL;
|
||
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;
|
||
}
|
||
|
||
eh = (struct elf_x86_link_hash_entry *) h;
|
||
if (h != NULL)
|
||
{
|
||
if (r_type == R_386_GOTOFF)
|
||
eh->gotoff_ref = 1;
|
||
|
||
/* It is referenced by a non-shared object. */
|
||
h->ref_regular = 1;
|
||
}
|
||
|
||
if (r_type == R_386_GOT32X
|
||
&& (h == NULL || h->type != STT_GNU_IFUNC))
|
||
{
|
||
Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
|
||
if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
|
||
&r_type, irel, h,
|
||
&converted, info))
|
||
goto error_return;
|
||
}
|
||
|
||
if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym,
|
||
symtab_hdr, &no_dynreloc))
|
||
return FALSE;
|
||
|
||
if (! elf_i386_tls_transition (info, abfd, sec, contents,
|
||
symtab_hdr, sym_hashes,
|
||
&r_type, GOT_UNKNOWN,
|
||
rel, rel_end, h, r_symndx, FALSE))
|
||
goto error_return;
|
||
|
||
/* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
|
||
if (h == htab->elf.hgot)
|
||
htab->got_referenced = TRUE;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_386_TLS_LDM:
|
||
htab->tls_ld_or_ldm_got.refcount = 1;
|
||
goto create_got;
|
||
|
||
case R_386_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;
|
||
|
||
eh->zero_undefweak &= 0x2;
|
||
h->needs_plt = 1;
|
||
h->plt.refcount = 1;
|
||
break;
|
||
|
||
case R_386_SIZE32:
|
||
size_reloc = TRUE;
|
||
goto do_size;
|
||
|
||
case R_386_TLS_IE_32:
|
||
case R_386_TLS_IE:
|
||
case R_386_TLS_GOTIE:
|
||
if (!bfd_link_executable (info))
|
||
info->flags |= DF_STATIC_TLS;
|
||
/* Fall through */
|
||
|
||
case R_386_GOT32:
|
||
case R_386_GOT32X:
|
||
case R_386_TLS_GD:
|
||
case R_386_TLS_GOTDESC:
|
||
case R_386_TLS_DESC_CALL:
|
||
/* This symbol requires a global offset table entry. */
|
||
{
|
||
int tls_type, old_tls_type;
|
||
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
case R_386_GOT32:
|
||
case R_386_GOT32X:
|
||
tls_type = GOT_NORMAL;
|
||
break;
|
||
case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
|
||
case R_386_TLS_GOTDESC:
|
||
case R_386_TLS_DESC_CALL:
|
||
tls_type = GOT_TLS_GDESC; break;
|
||
case R_386_TLS_IE_32:
|
||
if (ELF32_R_TYPE (rel->r_info) == r_type)
|
||
tls_type = GOT_TLS_IE_NEG;
|
||
else
|
||
/* If this is a GD->IE transition, we may use either of
|
||
R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
|
||
tls_type = GOT_TLS_IE;
|
||
break;
|
||
case R_386_TLS_IE:
|
||
case R_386_TLS_GOTIE:
|
||
tls_type = GOT_TLS_IE_POS; break;
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
h->got.refcount = 1;
|
||
old_tls_type = elf_x86_hash_entry (h)->tls_type;
|
||
}
|
||
else
|
||
{
|
||
bfd_signed_vma *local_got_refcounts;
|
||
|
||
/* This is a global offset table entry for a local symbol. */
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
if (local_got_refcounts == NULL)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
size = symtab_hdr->sh_info;
|
||
size *= (sizeof (bfd_signed_vma)
|
||
+ sizeof (bfd_vma) + sizeof(char));
|
||
local_got_refcounts = (bfd_signed_vma *)
|
||
bfd_zalloc (abfd, size);
|
||
if (local_got_refcounts == NULL)
|
||
goto error_return;
|
||
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
||
elf_x86_local_tlsdesc_gotent (abfd)
|
||
= (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
|
||
elf_x86_local_got_tls_type (abfd)
|
||
= (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
|
||
}
|
||
local_got_refcounts[r_symndx] = 1;
|
||
old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
|
||
}
|
||
|
||
if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
|
||
tls_type |= old_tls_type;
|
||
/* If a TLS symbol is accessed using IE at least once,
|
||
there is no point to use dynamic model for it. */
|
||
else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
|
||
&& (! GOT_TLS_GD_ANY_P (old_tls_type)
|
||
|| (tls_type & GOT_TLS_IE) == 0))
|
||
{
|
||
if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
|
||
tls_type = old_tls_type;
|
||
else if (GOT_TLS_GD_ANY_P (old_tls_type)
|
||
&& GOT_TLS_GD_ANY_P (tls_type))
|
||
tls_type |= old_tls_type;
|
||
else
|
||
{
|
||
if (h)
|
||
name = h->root.root.string;
|
||
else
|
||
name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
|
||
NULL);
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: `%s' accessed both as normal and "
|
||
"thread local symbol"),
|
||
abfd, name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
if (old_tls_type != tls_type)
|
||
{
|
||
if (h != NULL)
|
||
elf_x86_hash_entry (h)->tls_type = tls_type;
|
||
else
|
||
elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
|
||
}
|
||
}
|
||
/* Fall through */
|
||
|
||
case R_386_GOTOFF:
|
||
case R_386_GOTPC:
|
||
create_got:
|
||
if (r_type != R_386_TLS_IE)
|
||
{
|
||
if (eh != NULL)
|
||
{
|
||
eh->zero_undefweak &= 0x2;
|
||
|
||
/* Need GOT to resolve undefined weak symbol to 0. */
|
||
if (r_type == R_386_GOTOFF
|
||
&& h->root.type == bfd_link_hash_undefweak
|
||
&& bfd_link_executable (info))
|
||
htab->got_referenced = TRUE;
|
||
}
|
||
break;
|
||
}
|
||
/* Fall through */
|
||
|
||
case R_386_TLS_LE_32:
|
||
case R_386_TLS_LE:
|
||
if (eh != NULL)
|
||
eh->zero_undefweak &= 0x2;
|
||
if (bfd_link_executable (info))
|
||
break;
|
||
info->flags |= DF_STATIC_TLS;
|
||
goto do_relocation;
|
||
|
||
case R_386_32:
|
||
case R_386_PC32:
|
||
if (eh != NULL && (sec->flags & SEC_CODE) != 0)
|
||
eh->zero_undefweak |= 0x2;
|
||
do_relocation:
|
||
/* We are called after all symbols have been resolved. Only
|
||
relocation against STT_GNU_IFUNC symbol must go through
|
||
PLT. */
|
||
if (h != NULL
|
||
&& (bfd_link_executable (info)
|
||
|| h->type == STT_GNU_IFUNC))
|
||
{
|
||
bfd_boolean func_pointer_ref = FALSE;
|
||
|
||
if (r_type == R_386_PC32)
|
||
{
|
||
/* Since something like ".long foo - ." may be used
|
||
as pointer, make sure that PLT is used if foo is
|
||
a function defined in a shared library. */
|
||
if ((sec->flags & SEC_CODE) == 0)
|
||
h->pointer_equality_needed = 1;
|
||
else if (h->type == STT_GNU_IFUNC
|
||
&& bfd_link_pic (info))
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: unsupported non-PIC call to IFUNC `%s'"),
|
||
abfd, h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
h->pointer_equality_needed = 1;
|
||
/* R_386_32 can be resolved at run-time. */
|
||
if (r_type == R_386_32
|
||
&& (sec->flags & SEC_READONLY) == 0)
|
||
func_pointer_ref = TRUE;
|
||
}
|
||
|
||
if (!func_pointer_ref)
|
||
{
|
||
/* If this reloc is in a read-only section, we might
|
||
need a copy reloc. We can't check reliably at this
|
||
stage whether the section is read-only, as input
|
||
sections have not yet been mapped to output sections.
|
||
Tentatively set the flag for now, and correct in
|
||
adjust_dynamic_symbol. */
|
||
h->non_got_ref = 1;
|
||
|
||
/* We may need a .plt entry if the symbol is a function
|
||
defined in a shared lib or is a function referenced
|
||
from the code or read-only section. */
|
||
if (!h->def_regular
|
||
|| (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
|
||
h->plt.refcount = 1;
|
||
}
|
||
}
|
||
|
||
size_reloc = FALSE;
|
||
do_size:
|
||
if (!no_dynreloc
|
||
&& NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
|
||
R_386_32))
|
||
{
|
||
struct elf_dyn_relocs *p;
|
||
struct elf_dyn_relocs **head;
|
||
|
||
/* We must copy these reloc types into the output file.
|
||
Create a reloc section in dynobj and make room for
|
||
this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = _bfd_elf_make_dynamic_reloc_section
|
||
(sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
|
||
|
||
if (sreloc == NULL)
|
||
goto error_return;
|
||
}
|
||
|
||
/* If this is a global symbol, we count the number of
|
||
relocations we need for this symbol. */
|
||
if (h != NULL)
|
||
{
|
||
head = &h->dyn_relocs;
|
||
}
|
||
else
|
||
{
|
||
/* Track dynamic relocs needed for local syms too.
|
||
We really need local syms available to do this
|
||
easily. Oh well. */
|
||
void **vpp;
|
||
asection *s;
|
||
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
|
||
abfd, r_symndx);
|
||
if (isym == NULL)
|
||
goto error_return;
|
||
|
||
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_dyn_relocs **)vpp;
|
||
}
|
||
|
||
p = *head;
|
||
if (p == NULL || p->sec != sec)
|
||
{
|
||
size_t amt = sizeof *p;
|
||
p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
|
||
amt);
|
||
if (p == NULL)
|
||
goto error_return;
|
||
p->next = *head;
|
||
*head = p;
|
||
p->sec = sec;
|
||
p->count = 0;
|
||
p->pc_count = 0;
|
||
}
|
||
|
||
p->count += 1;
|
||
/* Count size relocation as PC-relative relocation. */
|
||
if (r_type == R_386_PC32 || size_reloc)
|
||
p->pc_count += 1;
|
||
}
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_386_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
goto error_return;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_386_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
|
||
goto error_return;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (elf_section_data (sec)->this_hdr.contents != contents)
|
||
{
|
||
if (!converted && !info->keep_memory)
|
||
free (contents);
|
||
else
|
||
{
|
||
/* Cache the section contents for elf_link_input_bfd if any
|
||
load is converted or --no-keep-memory isn't used. */
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
}
|
||
}
|
||
|
||
/* Cache relocations if any load is converted. */
|
||
if (elf_section_data (sec)->relocs != relocs && converted)
|
||
elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
|
||
|
||
return TRUE;
|
||
|
||
error_return:
|
||
if (elf_section_data (sec)->this_hdr.contents != contents)
|
||
free (contents);
|
||
sec->check_relocs_failed = 1;
|
||
return FALSE;
|
||
}
|
||
|
||
/* Set the correct type for an x86 ELF section. We do this by the
|
||
section name, which is a hack, but ought to work. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Shdr *hdr,
|
||
asection *sec)
|
||
{
|
||
const char *name;
|
||
|
||
name = bfd_section_name (sec);
|
||
|
||
/* This is an ugly, but unfortunately necessary hack that is
|
||
needed when producing EFI binaries on x86. It tells
|
||
elf.c:elf_fake_sections() not to consider ".reloc" as a section
|
||
containing ELF relocation info. We need this hack in order to
|
||
be able to generate ELF binaries that can be translated into
|
||
EFI applications (which are essentially COFF objects). Those
|
||
files contain a COFF ".reloc" section inside an ELFNN object,
|
||
which would normally cause BFD to segfault because it would
|
||
attempt to interpret this section as containing relocation
|
||
entries for section "oc". With this hack enabled, ".reloc"
|
||
will be treated as a normal data section, which will avoid the
|
||
segfault. However, you won't be able to create an ELFNN binary
|
||
with a section named "oc" that needs relocations, but that's
|
||
the kind of ugly side-effects you get when detecting section
|
||
types based on their names... In practice, this limitation is
|
||
unlikely to bite. */
|
||
if (strcmp (name, ".reloc") == 0)
|
||
hdr->sh_type = SHT_PROGBITS;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the relocation value for @tpoff relocation
|
||
if STT_TLS virtual address is ADDRESS. */
|
||
|
||
static bfd_vma
|
||
elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
|
||
{
|
||
struct elf_link_hash_table *htab = elf_hash_table (info);
|
||
const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
|
||
bfd_vma static_tls_size;
|
||
|
||
/* If tls_sec is NULL, we should have signalled an error already. */
|
||
if (htab->tls_sec == NULL)
|
||
return 0;
|
||
|
||
/* Consider special static TLS alignment requirements. */
|
||
static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
|
||
return static_tls_size + htab->tls_sec->vma - address;
|
||
}
|
||
|
||
/* Relocate an i386 ELF section. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_relocate_section (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd *input_bfd,
|
||
asection *input_section,
|
||
bfd_byte *contents,
|
||
Elf_Internal_Rela *relocs,
|
||
Elf_Internal_Sym *local_syms,
|
||
asection **local_sections)
|
||
{
|
||
struct elf_x86_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
bfd_vma *local_tlsdesc_gotents;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *wrel;
|
||
Elf_Internal_Rela *relend;
|
||
bfd_boolean is_vxworks_tls;
|
||
unsigned plt_entry_size;
|
||
|
||
/* Skip if check_relocs failed. */
|
||
if (input_section->check_relocs_failed)
|
||
return FALSE;
|
||
|
||
htab = elf_x86_hash_table (info, I386_ELF_DATA);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
if (!is_x86_elf (input_bfd, htab))
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return FALSE;
|
||
}
|
||
|
||
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
|
||
/* We have to handle relocations in vxworks .tls_vars sections
|
||
specially, because the dynamic loader is 'weird'. */
|
||
is_vxworks_tls = (htab->elf.target_os == is_vxworks
|
||
&& bfd_link_pic (info)
|
||
&& !strcmp (input_section->output_section->name,
|
||
".tls_vars"));
|
||
|
||
_bfd_x86_elf_set_tls_module_base (info);
|
||
|
||
plt_entry_size = htab->plt.plt_entry_size;
|
||
|
||
rel = wrel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; wrel++, rel++)
|
||
{
|
||
unsigned int r_type, r_type_tls;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
struct elf_x86_link_hash_entry *eh;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
bfd_vma off, offplt, plt_offset;
|
||
bfd_vma relocation;
|
||
bfd_boolean unresolved_reloc;
|
||
bfd_reloc_status_type r;
|
||
unsigned int indx;
|
||
int tls_type;
|
||
bfd_vma st_size;
|
||
asection *resolved_plt;
|
||
bfd_boolean resolved_to_zero;
|
||
bfd_boolean relative_reloc;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type == R_386_GNU_VTINHERIT
|
||
|| r_type == R_386_GNU_VTENTRY)
|
||
{
|
||
if (wrel != rel)
|
||
*wrel = *rel;
|
||
continue;
|
||
}
|
||
|
||
howto = elf_i386_rtype_to_howto (r_type);
|
||
if (howto == NULL)
|
||
return _bfd_unrecognized_reloc (input_bfd, input_section, 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 = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
st_size = sym->st_size;
|
||
|
||
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
|
||
&& ((sec->flags & SEC_MERGE) != 0
|
||
|| (bfd_link_relocatable (info)
|
||
&& sec->output_offset != 0)))
|
||
{
|
||
bfd_vma addend;
|
||
bfd_byte *where = contents + rel->r_offset;
|
||
|
||
switch (howto->size)
|
||
{
|
||
case 0:
|
||
addend = bfd_get_8 (input_bfd, where);
|
||
if (howto->pc_relative)
|
||
{
|
||
addend = (addend ^ 0x80) - 0x80;
|
||
addend += 1;
|
||
}
|
||
break;
|
||
case 1:
|
||
addend = bfd_get_16 (input_bfd, where);
|
||
if (howto->pc_relative)
|
||
{
|
||
addend = (addend ^ 0x8000) - 0x8000;
|
||
addend += 2;
|
||
}
|
||
break;
|
||
case 2:
|
||
addend = bfd_get_32 (input_bfd, where);
|
||
if (howto->pc_relative)
|
||
{
|
||
addend = (addend ^ 0x80000000) - 0x80000000;
|
||
addend += 4;
|
||
}
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
if (bfd_link_relocatable (info))
|
||
addend += sec->output_offset;
|
||
else
|
||
{
|
||
asection *msec = sec;
|
||
addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
|
||
addend);
|
||
addend -= relocation;
|
||
addend += msec->output_section->vma + msec->output_offset;
|
||
}
|
||
|
||
switch (howto->size)
|
||
{
|
||
case 0:
|
||
/* FIXME: overflow checks. */
|
||
if (howto->pc_relative)
|
||
addend -= 1;
|
||
bfd_put_8 (input_bfd, addend, where);
|
||
break;
|
||
case 1:
|
||
if (howto->pc_relative)
|
||
addend -= 2;
|
||
bfd_put_16 (input_bfd, addend, where);
|
||
break;
|
||
case 2:
|
||
if (howto->pc_relative)
|
||
addend -= 4;
|
||
bfd_put_32 (input_bfd, addend, where);
|
||
break;
|
||
}
|
||
}
|
||
else if (!bfd_link_relocatable (info)
|
||
&& ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
|
||
{
|
||
/* Relocate against local STT_GNU_IFUNC symbol. */
|
||
h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
|
||
FALSE);
|
||
if (h == NULL)
|
||
abort ();
|
||
|
||
/* Set STT_GNU_IFUNC symbol value. */
|
||
h->root.u.def.value = sym->st_value;
|
||
h->root.u.def.section = sec;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
bfd_boolean warned ATTRIBUTE_UNUSED;
|
||
bfd_boolean ignored ATTRIBUTE_UNUSED;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned, ignored);
|
||
st_size = h->size;
|
||
}
|
||
|
||
if (sec != NULL && discarded_section (sec))
|
||
{
|
||
_bfd_clear_contents (howto, input_bfd, input_section,
|
||
contents, rel->r_offset);
|
||
wrel->r_offset = rel->r_offset;
|
||
wrel->r_info = 0;
|
||
wrel->r_addend = 0;
|
||
|
||
/* For ld -r, remove relocations in debug sections against
|
||
sections defined in discarded sections. Not done for
|
||
eh_frame editing code expects to be present. */
|
||
if (bfd_link_relocatable (info)
|
||
&& (input_section->flags & SEC_DEBUGGING))
|
||
wrel--;
|
||
|
||
continue;
|
||
}
|
||
|
||
if (bfd_link_relocatable (info))
|
||
{
|
||
if (wrel != rel)
|
||
*wrel = *rel;
|
||
continue;
|
||
}
|
||
|
||
eh = (struct elf_x86_link_hash_entry *) h;
|
||
|
||
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle
|
||
it here if it is defined in a non-shared object. */
|
||
if (h != NULL
|
||
&& h->type == STT_GNU_IFUNC
|
||
&& h->def_regular)
|
||
{
|
||
asection *gotplt, *base_got;
|
||
bfd_vma plt_index;
|
||
const char *name;
|
||
|
||
if ((input_section->flags & SEC_ALLOC) == 0)
|
||
{
|
||
/* If this is a SHT_NOTE section without SHF_ALLOC, treat
|
||
STT_GNU_IFUNC symbol as STT_FUNC. */
|
||
if (elf_section_type (input_section) == SHT_NOTE)
|
||
goto skip_ifunc;
|
||
/* 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 ((input_section->flags & SEC_DEBUGGING) != 0)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
/* STT_GNU_IFUNC symbol must go through PLT. */
|
||
if (htab->elf.splt != NULL)
|
||
{
|
||
if (htab->plt_second != NULL)
|
||
{
|
||
resolved_plt = htab->plt_second;
|
||
plt_offset = eh->plt_second.offset;
|
||
}
|
||
else
|
||
{
|
||
resolved_plt = htab->elf.splt;
|
||
plt_offset = h->plt.offset;
|
||
}
|
||
gotplt = htab->elf.sgotplt;
|
||
}
|
||
else
|
||
{
|
||
resolved_plt = htab->elf.iplt;
|
||
plt_offset = h->plt.offset;
|
||
gotplt = htab->elf.igotplt;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case R_386_GOT32:
|
||
case R_386_GOT32X:
|
||
base_got = htab->elf.sgot;
|
||
off = h->got.offset;
|
||
|
||
if (base_got == NULL)
|
||
abort ();
|
||
|
||
if (off == (bfd_vma) -1)
|
||
{
|
||
/* We can't use h->got.offset here to save state, or
|
||
even just remember the offset, as finish_dynamic_symbol
|
||
would use that as offset into .got. */
|
||
|
||
if (h->plt.offset == (bfd_vma) -1)
|
||
abort ();
|
||
|
||
if (htab->elf.splt != NULL)
|
||
{
|
||
plt_index = (h->plt.offset / plt_entry_size
|
||
- htab->plt.has_plt0);
|
||
off = (plt_index + 3) * 4;
|
||
base_got = htab->elf.sgotplt;
|
||
}
|
||
else
|
||
{
|
||
plt_index = h->plt.offset / plt_entry_size;
|
||
off = plt_index * 4;
|
||
base_got = htab->elf.igotplt;
|
||
}
|
||
|
||
if (h->dynindx == -1
|
||
|| h->forced_local
|
||
|| info->symbolic)
|
||
{
|
||
/* This references the local defitionion. We must
|
||
initialize this entry in the global offset table.
|
||
Since the offset must always be a multiple of 8,
|
||
we use the least significant bit to record
|
||
whether we have initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rela.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation,
|
||
base_got->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
}
|
||
|
||
relocation = off;
|
||
}
|
||
else
|
||
relocation = (base_got->output_section->vma
|
||
+ base_got->output_offset + off
|
||
- gotplt->output_section->vma
|
||
- gotplt->output_offset);
|
||
|
||
if (rel->r_offset > 1
|
||
&& (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
|
||
&& *(contents + rel->r_offset - 2) != 0x8d)
|
||
{
|
||
if (bfd_link_pic (info))
|
||
goto disallow_got32;
|
||
|
||
/* Add the GOT base if there is no base register. */
|
||
relocation += (gotplt->output_section->vma
|
||
+ gotplt->output_offset);
|
||
}
|
||
else if (htab->elf.splt == NULL)
|
||
{
|
||
/* Adjust for static executables. */
|
||
relocation += gotplt->output_offset;
|
||
}
|
||
|
||
goto do_relocation;
|
||
}
|
||
|
||
if (h->plt.offset == (bfd_vma) -1)
|
||
{
|
||
/* Handle static pointers of STT_GNU_IFUNC symbols. */
|
||
if (r_type == R_386_32
|
||
&& (input_section->flags & SEC_CODE) == 0)
|
||
goto do_ifunc_pointer;
|
||
goto bad_ifunc_reloc;
|
||
}
|
||
|
||
relocation = (resolved_plt->output_section->vma
|
||
+ resolved_plt->output_offset + plt_offset);
|
||
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
bad_ifunc_reloc:
|
||
if (h->root.root.string)
|
||
name = h->root.root.string;
|
||
else
|
||
name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
|
||
NULL);
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: relocation %s against STT_GNU_IFUNC "
|
||
"symbol `%s' isn't supported"), input_bfd,
|
||
howto->name, name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
|
||
case R_386_32:
|
||
/* Generate dynamic relcoation only when there is a
|
||
non-GOT reference in a shared object. */
|
||
if ((bfd_link_pic (info) && h->non_got_ref)
|
||
|| h->plt.offset == (bfd_vma) -1)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
asection *sreloc;
|
||
bfd_vma offset;
|
||
|
||
do_ifunc_pointer:
|
||
/* Need a dynamic relocation to get the real function
|
||
adddress. */
|
||
offset = _bfd_elf_section_offset (output_bfd,
|
||
info,
|
||
input_section,
|
||
rel->r_offset);
|
||
if (offset == (bfd_vma) -1
|
||
|| offset == (bfd_vma) -2)
|
||
abort ();
|
||
|
||
outrel.r_offset = (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ offset);
|
||
|
||
if (POINTER_LOCAL_IFUNC_P (info, h))
|
||
{
|
||
info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
|
||
h->root.root.string,
|
||
h->root.u.def.section->owner);
|
||
|
||
/* This symbol is resolved locally. */
|
||
outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
|
||
bfd_put_32 (output_bfd,
|
||
(h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset),
|
||
contents + offset);
|
||
}
|
||
else
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
||
|
||
/* Dynamic relocations are stored in
|
||
1. .rel.ifunc section in PIC object.
|
||
2. .rel.got section in dynamic executable.
|
||
3. .rel.iplt section in static executable. */
|
||
if (bfd_link_pic (info))
|
||
sreloc = htab->elf.irelifunc;
|
||
else if (htab->elf.splt != NULL)
|
||
sreloc = htab->elf.srelgot;
|
||
else
|
||
sreloc = htab->elf.irelplt;
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
|
||
/* If this reloc is against an external symbol, we
|
||
do not want to fiddle with the addend. Otherwise,
|
||
we need to include the symbol value so that it
|
||
becomes an addend for the dynamic reloc. For an
|
||
internal symbol, we have updated addend. */
|
||
continue;
|
||
}
|
||
/* FALLTHROUGH */
|
||
case R_386_PC32:
|
||
case R_386_PLT32:
|
||
goto do_relocation;
|
||
|
||
case R_386_GOTOFF:
|
||
relocation -= (gotplt->output_section->vma
|
||
+ gotplt->output_offset);
|
||
goto do_relocation;
|
||
}
|
||
}
|
||
|
||
skip_ifunc:
|
||
resolved_to_zero = (eh != NULL
|
||
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_386_GOT32X:
|
||
case R_386_GOT32:
|
||
/* Relocation is to the entry for this symbol in the global
|
||
offset table. */
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
relative_reloc = FALSE;
|
||
if (h != NULL)
|
||
{
|
||
off = h->got.offset;
|
||
if (RESOLVED_LOCALLY_P (info, h, htab))
|
||
{
|
||
/* 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 .rel.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation,
|
||
htab->elf.sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
|
||
if (GENERATE_RELATIVE_RELOC_P (info, h))
|
||
{
|
||
/* PR ld/21402: If this symbol isn't dynamic
|
||
in PIC, generate R_386_RELATIVE here. */
|
||
eh->no_finish_dynamic_symbol = 1;
|
||
relative_reloc = TRUE;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else
|
||
{
|
||
if (local_got_offsets == NULL)
|
||
abort ();
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* The offset must always be a multiple of 4. We use
|
||
the least significant bit to record whether we have
|
||
already generated the necessary reloc. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation,
|
||
htab->elf.sgot->contents + off);
|
||
local_got_offsets[r_symndx] |= 1;
|
||
|
||
if (bfd_link_pic (info))
|
||
relative_reloc = TRUE;
|
||
}
|
||
}
|
||
|
||
if (relative_reloc)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela outrel;
|
||
|
||
s = htab->elf.srelgot;
|
||
if (s == NULL)
|
||
abort ();
|
||
|
||
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
|
||
elf_append_rel (output_bfd, s, &outrel);
|
||
}
|
||
|
||
if (off >= (bfd_vma) -2)
|
||
abort ();
|
||
|
||
relocation = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off);
|
||
if (rel->r_offset > 1
|
||
&& (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
|
||
&& *(contents + rel->r_offset - 2) != 0x8d)
|
||
{
|
||
if (bfd_link_pic (info))
|
||
{
|
||
/* For PIC, disallow R_386_GOT32 without a base
|
||
register, except for "lea foo@GOT, %reg", since
|
||
we don't know what the GOT base is. */
|
||
const char *name;
|
||
|
||
disallow_got32:
|
||
if (h == NULL || h->root.root.string == NULL)
|
||
name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
|
||
NULL);
|
||
else
|
||
name = h->root.root.string;
|
||
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: direct GOT relocation %s against `%s'"
|
||
" without base register can not be used"
|
||
" when making a shared object"),
|
||
input_bfd, howto->name, name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Subtract the .got.plt section address only with a base
|
||
register. */
|
||
relocation -= (htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset);
|
||
}
|
||
|
||
break;
|
||
|
||
case R_386_GOTOFF:
|
||
/* Relocation is relative to the start of the global offset
|
||
table. */
|
||
|
||
/* Check to make sure it isn't a protected function or data
|
||
symbol for shared library since it may not be local when
|
||
used as function address or with copy relocation. We also
|
||
need to make sure that a symbol is referenced locally. */
|
||
if (!bfd_link_executable (info) && h)
|
||
{
|
||
if (!h->def_regular)
|
||
{
|
||
const char *v;
|
||
|
||
switch (ELF_ST_VISIBILITY (h->other))
|
||
{
|
||
case STV_HIDDEN:
|
||
v = _("hidden symbol");
|
||
break;
|
||
case STV_INTERNAL:
|
||
v = _("internal symbol");
|
||
break;
|
||
case STV_PROTECTED:
|
||
v = _("protected symbol");
|
||
break;
|
||
default:
|
||
v = _("symbol");
|
||
break;
|
||
}
|
||
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: relocation R_386_GOTOFF against undefined %s"
|
||
" `%s' can not be used when making a shared object"),
|
||
input_bfd, v, h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
|
||
&& (h->type == STT_FUNC
|
||
|| h->type == STT_OBJECT)
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: relocation R_386_GOTOFF against protected %s"
|
||
" `%s' can not be used when making a shared object"),
|
||
input_bfd,
|
||
h->type == STT_FUNC ? "function" : "data",
|
||
h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
/* Note that sgot is not involved in this
|
||
calculation. We always want the start of .got.plt. If we
|
||
defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
|
||
permitted by the ABI, we might have to change this
|
||
calculation. */
|
||
relocation -= htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset;
|
||
break;
|
||
|
||
case R_386_GOTPC:
|
||
/* Use global offset table as symbol value. */
|
||
relocation = htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset;
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_386_PLT32:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* Resolve a PLT32 reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL)
|
||
break;
|
||
|
||
if ((h->plt.offset == (bfd_vma) -1
|
||
&& eh->plt_got.offset == (bfd_vma) -1)
|
||
|| htab->elf.splt == NULL)
|
||
{
|
||
/* We didn't make a PLT entry for this symbol. This
|
||
happens when statically linking PIC code, or when
|
||
using -Bsymbolic. */
|
||
break;
|
||
}
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
if (htab->plt_second != NULL)
|
||
{
|
||
resolved_plt = htab->plt_second;
|
||
plt_offset = eh->plt_second.offset;
|
||
}
|
||
else
|
||
{
|
||
resolved_plt = htab->elf.splt;
|
||
plt_offset = h->plt.offset;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
resolved_plt = htab->plt_got;
|
||
plt_offset = eh->plt_got.offset;
|
||
}
|
||
|
||
relocation = (resolved_plt->output_section->vma
|
||
+ resolved_plt->output_offset
|
||
+ plt_offset);
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_386_SIZE32:
|
||
/* Set to symbol size. */
|
||
relocation = st_size;
|
||
/* Fall through. */
|
||
|
||
case R_386_32:
|
||
case R_386_PC32:
|
||
if ((input_section->flags & SEC_ALLOC) == 0
|
||
|| is_vxworks_tls)
|
||
break;
|
||
|
||
if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, sec,
|
||
FALSE, resolved_to_zero,
|
||
(r_type == R_386_PC32)))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_boolean skip, relocate;
|
||
asection *sreloc;
|
||
|
||
/* 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 (COPY_INPUT_RELOC_P (info, h, r_type))
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
||
else
|
||
{
|
||
/* This symbol is local, or marked to become local. */
|
||
relocate = TRUE;
|
||
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
|
||
}
|
||
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
|
||
if (sreloc == NULL || sreloc->contents == NULL)
|
||
{
|
||
r = bfd_reloc_notsupported;
|
||
goto check_relocation_error;
|
||
}
|
||
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
|
||
/* If this reloc is against an external symbol, we do
|
||
not want to fiddle with the addend. Otherwise, we
|
||
need to include the symbol value so that it becomes
|
||
an addend for the dynamic reloc. */
|
||
if (! relocate)
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case R_386_TLS_IE:
|
||
if (!bfd_link_executable (info))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
asection *sreloc;
|
||
|
||
outrel.r_offset = rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset;
|
||
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
if (sreloc == NULL)
|
||
abort ();
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
}
|
||
/* Fall through */
|
||
|
||
case R_386_TLS_GD:
|
||
case R_386_TLS_GOTDESC:
|
||
case R_386_TLS_DESC_CALL:
|
||
case R_386_TLS_IE_32:
|
||
case R_386_TLS_GOTIE:
|
||
tls_type = GOT_UNKNOWN;
|
||
if (h == NULL && local_got_offsets)
|
||
tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
|
||
else if (h != NULL)
|
||
tls_type = elf_x86_hash_entry(h)->tls_type;
|
||
if (tls_type == GOT_TLS_IE)
|
||
tls_type = GOT_TLS_IE_NEG;
|
||
|
||
r_type_tls = r_type;
|
||
if (! elf_i386_tls_transition (info, input_bfd,
|
||
input_section, contents,
|
||
symtab_hdr, sym_hashes,
|
||
&r_type_tls, tls_type, rel,
|
||
relend, h, r_symndx, TRUE))
|
||
return FALSE;
|
||
|
||
if (r_type_tls == R_386_TLS_LE_32)
|
||
{
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
if (r_type == R_386_TLS_GD)
|
||
{
|
||
unsigned int type;
|
||
bfd_vma roff;
|
||
|
||
/* GD->LE transition. */
|
||
type = *(contents + rel->r_offset - 2);
|
||
if (type == 0x04)
|
||
{
|
||
/* Change
|
||
leal foo@tlsgd(,%ebx,1), %eax
|
||
call ___tls_get_addr@PLT
|
||
into:
|
||
movl %gs:0, %eax
|
||
subl $foo@tpoff, %eax
|
||
(6 byte form of subl). */
|
||
roff = rel->r_offset + 5;
|
||
}
|
||
else
|
||
{
|
||
/* Change
|
||
leal foo@tlsgd(%ebx), %eax
|
||
call ___tls_get_addr@PLT
|
||
nop
|
||
or
|
||
leal foo@tlsgd(%reg), %eax
|
||
call *___tls_get_addr@GOT(%reg)
|
||
which may be converted to
|
||
addr32 call ___tls_get_addr
|
||
into:
|
||
movl %gs:0, %eax; subl $foo@tpoff, %eax
|
||
(6 byte form of subl). */
|
||
roff = rel->r_offset + 6;
|
||
}
|
||
memcpy (contents + roff - 8,
|
||
"\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
|
||
bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
|
||
contents + roff);
|
||
/* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
|
||
rel++;
|
||
wrel++;
|
||
continue;
|
||
}
|
||
else if (r_type == R_386_TLS_GOTDESC)
|
||
{
|
||
/* GDesc -> LE transition.
|
||
It's originally something like:
|
||
leal x@tlsdesc(%ebx), %eax
|
||
|
||
leal x@ntpoff, %eax
|
||
|
||
Registers other than %eax may be set up here. */
|
||
|
||
unsigned int val;
|
||
bfd_vma roff;
|
||
|
||
roff = rel->r_offset;
|
||
val = bfd_get_8 (input_bfd, contents + roff - 1);
|
||
|
||
/* Now modify the instruction as appropriate. */
|
||
/* aoliva FIXME: remove the above and xor the byte
|
||
below with 0x86. */
|
||
bfd_put_8 (output_bfd, val ^ 0x86,
|
||
contents + roff - 1);
|
||
bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
|
||
contents + roff);
|
||
continue;
|
||
}
|
||
else if (r_type == R_386_TLS_DESC_CALL)
|
||
{
|
||
/* GDesc -> LE transition.
|
||
It's originally:
|
||
call *(%eax)
|
||
Turn it into:
|
||
xchg %ax,%ax */
|
||
|
||
bfd_vma roff;
|
||
|
||
roff = rel->r_offset;
|
||
bfd_put_8 (output_bfd, 0x66, contents + roff);
|
||
bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
|
||
continue;
|
||
}
|
||
else if (r_type == R_386_TLS_IE)
|
||
{
|
||
unsigned int val;
|
||
|
||
/* IE->LE transition:
|
||
Originally it can be one of:
|
||
movl foo, %eax
|
||
movl foo, %reg
|
||
addl foo, %reg
|
||
We change it into:
|
||
movl $foo, %eax
|
||
movl $foo, %reg
|
||
addl $foo, %reg. */
|
||
val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
|
||
if (val == 0xa1)
|
||
{
|
||
/* movl foo, %eax. */
|
||
bfd_put_8 (output_bfd, 0xb8,
|
||
contents + rel->r_offset - 1);
|
||
}
|
||
else
|
||
{
|
||
unsigned int type;
|
||
|
||
type = bfd_get_8 (input_bfd,
|
||
contents + rel->r_offset - 2);
|
||
switch (type)
|
||
{
|
||
case 0x8b:
|
||
/* movl */
|
||
bfd_put_8 (output_bfd, 0xc7,
|
||
contents + rel->r_offset - 2);
|
||
bfd_put_8 (output_bfd,
|
||
0xc0 | ((val >> 3) & 7),
|
||
contents + rel->r_offset - 1);
|
||
break;
|
||
case 0x03:
|
||
/* addl */
|
||
bfd_put_8 (output_bfd, 0x81,
|
||
contents + rel->r_offset - 2);
|
||
bfd_put_8 (output_bfd,
|
||
0xc0 | ((val >> 3) & 7),
|
||
contents + rel->r_offset - 1);
|
||
break;
|
||
default:
|
||
BFD_FAIL ();
|
||
break;
|
||
}
|
||
}
|
||
bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
|
||
contents + rel->r_offset);
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
unsigned int val, type;
|
||
|
||
/* {IE_32,GOTIE}->LE transition:
|
||
Originally it can be one of:
|
||
subl foo(%reg1), %reg2
|
||
movl foo(%reg1), %reg2
|
||
addl foo(%reg1), %reg2
|
||
We change it into:
|
||
subl $foo, %reg2
|
||
movl $foo, %reg2 (6 byte form)
|
||
addl $foo, %reg2. */
|
||
type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
|
||
val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
|
||
if (type == 0x8b)
|
||
{
|
||
/* movl */
|
||
bfd_put_8 (output_bfd, 0xc7,
|
||
contents + rel->r_offset - 2);
|
||
bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
|
||
contents + rel->r_offset - 1);
|
||
}
|
||
else if (type == 0x2b)
|
||
{
|
||
/* subl */
|
||
bfd_put_8 (output_bfd, 0x81,
|
||
contents + rel->r_offset - 2);
|
||
bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
|
||
contents + rel->r_offset - 1);
|
||
}
|
||
else if (type == 0x03)
|
||
{
|
||
/* addl */
|
||
bfd_put_8 (output_bfd, 0x81,
|
||
contents + rel->r_offset - 2);
|
||
bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
|
||
contents + rel->r_offset - 1);
|
||
}
|
||
else
|
||
BFD_FAIL ();
|
||
if (r_type == R_386_TLS_GOTIE)
|
||
bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
|
||
contents + rel->r_offset);
|
||
else
|
||
bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
|
||
contents + rel->r_offset);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
if (h != NULL)
|
||
{
|
||
off = h->got.offset;
|
||
offplt = elf_x86_hash_entry (h)->tlsdesc_got;
|
||
}
|
||
else
|
||
{
|
||
if (local_got_offsets == NULL)
|
||
abort ();
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
offplt = local_tlsdesc_gotents[r_symndx];
|
||
}
|
||
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
int dr_type;
|
||
asection *sreloc;
|
||
|
||
if (htab->elf.srelgot == NULL)
|
||
abort ();
|
||
|
||
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
||
|
||
if (GOT_TLS_GDESC_P (tls_type))
|
||
{
|
||
bfd_byte *loc;
|
||
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
|
||
BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
|
||
<= htab->elf.sgotplt->size);
|
||
outrel.r_offset = (htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset
|
||
+ offplt
|
||
+ htab->sgotplt_jump_table_size);
|
||
sreloc = htab->elf.srelplt;
|
||
loc = sreloc->contents;
|
||
loc += (htab->next_tls_desc_index++
|
||
* sizeof (Elf32_External_Rel));
|
||
BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
|
||
<= sreloc->contents + sreloc->size);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
||
if (indx == 0)
|
||
{
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
bfd_put_32 (output_bfd,
|
||
relocation - _bfd_x86_elf_dtpoff_base (info),
|
||
htab->elf.sgotplt->contents + offplt
|
||
+ htab->sgotplt_jump_table_size + 4);
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, 0,
|
||
htab->elf.sgotplt->contents + offplt
|
||
+ htab->sgotplt_jump_table_size + 4);
|
||
}
|
||
}
|
||
|
||
sreloc = htab->elf.srelgot;
|
||
|
||
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off);
|
||
|
||
if (GOT_TLS_GD_P (tls_type))
|
||
dr_type = R_386_TLS_DTPMOD32;
|
||
else if (GOT_TLS_GDESC_P (tls_type))
|
||
goto dr_done;
|
||
else if (tls_type == GOT_TLS_IE_POS)
|
||
dr_type = R_386_TLS_TPOFF;
|
||
else
|
||
dr_type = R_386_TLS_TPOFF32;
|
||
|
||
if (dr_type == R_386_TLS_TPOFF && indx == 0)
|
||
bfd_put_32 (output_bfd,
|
||
relocation - _bfd_x86_elf_dtpoff_base (info),
|
||
htab->elf.sgot->contents + off);
|
||
else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
|
||
bfd_put_32 (output_bfd,
|
||
_bfd_x86_elf_dtpoff_base (info) - relocation,
|
||
htab->elf.sgot->contents + off);
|
||
else if (dr_type != R_386_TLS_DESC)
|
||
bfd_put_32 (output_bfd, 0,
|
||
htab->elf.sgot->contents + off);
|
||
outrel.r_info = ELF32_R_INFO (indx, dr_type);
|
||
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
|
||
if (GOT_TLS_GD_P (tls_type))
|
||
{
|
||
if (indx == 0)
|
||
{
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
bfd_put_32 (output_bfd,
|
||
relocation - _bfd_x86_elf_dtpoff_base (info),
|
||
htab->elf.sgot->contents + off + 4);
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, 0,
|
||
htab->elf.sgot->contents + off + 4);
|
||
outrel.r_info = ELF32_R_INFO (indx,
|
||
R_386_TLS_DTPOFF32);
|
||
outrel.r_offset += 4;
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
}
|
||
}
|
||
else if (tls_type == GOT_TLS_IE_BOTH)
|
||
{
|
||
bfd_put_32 (output_bfd,
|
||
(indx == 0
|
||
? relocation - _bfd_x86_elf_dtpoff_base (info)
|
||
: 0),
|
||
htab->elf.sgot->contents + off + 4);
|
||
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
|
||
outrel.r_offset += 4;
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
}
|
||
|
||
dr_done:
|
||
if (h != NULL)
|
||
h->got.offset |= 1;
|
||
else
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
|
||
if (off >= (bfd_vma) -2
|
||
&& ! GOT_TLS_GDESC_P (tls_type))
|
||
abort ();
|
||
if (r_type_tls == R_386_TLS_GOTDESC
|
||
|| r_type_tls == R_386_TLS_DESC_CALL)
|
||
{
|
||
relocation = htab->sgotplt_jump_table_size + offplt;
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else if (r_type_tls == r_type)
|
||
{
|
||
bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset;
|
||
relocation = htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off - g_o_t;
|
||
if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
|
||
&& tls_type == GOT_TLS_IE_BOTH)
|
||
relocation += 4;
|
||
if (r_type == R_386_TLS_IE)
|
||
relocation += g_o_t;
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else if (r_type == R_386_TLS_GD)
|
||
{
|
||
unsigned int val, type;
|
||
bfd_vma roff;
|
||
|
||
/* GD->IE transition. */
|
||
type = *(contents + rel->r_offset - 2);
|
||
val = *(contents + rel->r_offset - 1);
|
||
if (type == 0x04)
|
||
{
|
||
/* Change
|
||
leal foo@tlsgd(,%ebx,1), %eax
|
||
call ___tls_get_addr@PLT
|
||
into:
|
||
movl %gs:0, %eax
|
||
subl $foo@gottpoff(%ebx), %eax. */
|
||
val >>= 3;
|
||
roff = rel->r_offset - 3;
|
||
}
|
||
else
|
||
{
|
||
/* Change
|
||
leal foo@tlsgd(%ebx), %eax
|
||
call ___tls_get_addr@PLT
|
||
nop
|
||
or
|
||
leal foo@tlsgd(%reg), %eax
|
||
call *___tls_get_addr@GOT(%reg)
|
||
which may be converted to
|
||
addr32 call ___tls_get_addr
|
||
into:
|
||
movl %gs:0, %eax;
|
||
subl $foo@gottpoff(%reg), %eax. */
|
||
roff = rel->r_offset - 2;
|
||
}
|
||
memcpy (contents + roff,
|
||
"\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
|
||
contents[roff + 7] = 0x80 | (val & 7);
|
||
/* If foo is used only with foo@gotntpoff(%reg) and
|
||
foo@indntpoff, but not with foo@gottpoff(%reg), change
|
||
subl $foo@gottpoff(%reg), %eax
|
||
into:
|
||
addl $foo@gotntpoff(%reg), %eax. */
|
||
if (tls_type == GOT_TLS_IE_POS)
|
||
contents[roff + 6] = 0x03;
|
||
bfd_put_32 (output_bfd,
|
||
htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off
|
||
- htab->elf.sgotplt->output_section->vma
|
||
- htab->elf.sgotplt->output_offset,
|
||
contents + roff + 8);
|
||
/* Skip R_386_PLT32 and R_386_GOT32X. */
|
||
rel++;
|
||
wrel++;
|
||
continue;
|
||
}
|
||
else if (r_type == R_386_TLS_GOTDESC)
|
||
{
|
||
/* GDesc -> IE transition.
|
||
It's originally something like:
|
||
leal x@tlsdesc(%ebx), %eax
|
||
|
||
Change it to:
|
||
movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
|
||
or:
|
||
movl x@gottpoff(%ebx), %eax # before negl %eax
|
||
|
||
Registers other than %eax may be set up here. */
|
||
|
||
bfd_vma roff;
|
||
|
||
/* First, make sure it's a leal adding ebx to a 32-bit
|
||
offset into any register, although it's probably
|
||
almost always going to be eax. */
|
||
roff = rel->r_offset;
|
||
|
||
/* Now modify the instruction as appropriate. */
|
||
/* To turn a leal into a movl in the form we use it, it
|
||
suffices to change the first byte from 0x8d to 0x8b.
|
||
aoliva FIXME: should we decide to keep the leal, all
|
||
we have to do is remove the statement below, and
|
||
adjust the relaxation of R_386_TLS_DESC_CALL. */
|
||
bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
|
||
|
||
if (tls_type == GOT_TLS_IE_BOTH)
|
||
off += 4;
|
||
|
||
bfd_put_32 (output_bfd,
|
||
htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off
|
||
- htab->elf.sgotplt->output_section->vma
|
||
- htab->elf.sgotplt->output_offset,
|
||
contents + roff);
|
||
continue;
|
||
}
|
||
else if (r_type == R_386_TLS_DESC_CALL)
|
||
{
|
||
/* GDesc -> IE transition.
|
||
It's originally:
|
||
call *(%eax)
|
||
|
||
Change it to:
|
||
xchg %ax,%ax
|
||
or
|
||
negl %eax
|
||
depending on how we transformed the TLS_GOTDESC above.
|
||
*/
|
||
|
||
bfd_vma roff;
|
||
|
||
roff = rel->r_offset;
|
||
|
||
/* Now modify the instruction as appropriate. */
|
||
if (tls_type != GOT_TLS_IE_NEG)
|
||
{
|
||
/* xchg %ax,%ax */
|
||
bfd_put_8 (output_bfd, 0x66, contents + roff);
|
||
bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
|
||
}
|
||
else
|
||
{
|
||
/* negl %eax */
|
||
bfd_put_8 (output_bfd, 0xf7, contents + roff);
|
||
bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
|
||
}
|
||
|
||
continue;
|
||
}
|
||
else
|
||
BFD_ASSERT (FALSE);
|
||
break;
|
||
|
||
case R_386_TLS_LDM:
|
||
if (! elf_i386_tls_transition (info, input_bfd,
|
||
input_section, contents,
|
||
symtab_hdr, sym_hashes,
|
||
&r_type, GOT_UNKNOWN, rel,
|
||
relend, h, r_symndx, TRUE))
|
||
return FALSE;
|
||
|
||
if (r_type != R_386_TLS_LDM)
|
||
{
|
||
/* LD->LE transition. Change
|
||
leal foo@tlsldm(%ebx) %eax
|
||
call ___tls_get_addr@PLT
|
||
into:
|
||
movl %gs:0, %eax
|
||
nop
|
||
leal 0(%esi,1), %esi
|
||
or change
|
||
leal foo@tlsldm(%reg) %eax
|
||
call *___tls_get_addr@GOT(%reg)
|
||
which may be converted to
|
||
addr32 call ___tls_get_addr
|
||
into:
|
||
movl %gs:0, %eax
|
||
leal 0(%esi), %esi */
|
||
BFD_ASSERT (r_type == R_386_TLS_LE_32);
|
||
if (*(contents + rel->r_offset + 4) == 0xff
|
||
|| *(contents + rel->r_offset + 4) == 0x67)
|
||
memcpy (contents + rel->r_offset - 2,
|
||
"\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
|
||
else
|
||
memcpy (contents + rel->r_offset - 2,
|
||
"\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
|
||
/* Skip R_386_PC32/R_386_PLT32. */
|
||
rel++;
|
||
wrel++;
|
||
continue;
|
||
}
|
||
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
off = htab->tls_ld_or_ldm_got.offset;
|
||
if (off & 1)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
|
||
if (htab->elf.srelgot == NULL)
|
||
abort ();
|
||
|
||
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off);
|
||
|
||
bfd_put_32 (output_bfd, 0,
|
||
htab->elf.sgot->contents + off);
|
||
bfd_put_32 (output_bfd, 0,
|
||
htab->elf.sgot->contents + off + 4);
|
||
outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
|
||
elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
|
||
htab->tls_ld_or_ldm_got.offset |= 1;
|
||
}
|
||
relocation = htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off
|
||
- htab->elf.sgotplt->output_section->vma
|
||
- htab->elf.sgotplt->output_offset;
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_386_TLS_LDO_32:
|
||
if (!bfd_link_executable (info)
|
||
|| (input_section->flags & SEC_CODE) == 0)
|
||
relocation -= _bfd_x86_elf_dtpoff_base (info);
|
||
else
|
||
/* When converting LDO to LE, we must negate. */
|
||
relocation = -elf_i386_tpoff (info, relocation);
|
||
break;
|
||
|
||
case R_386_TLS_LE_32:
|
||
case R_386_TLS_LE:
|
||
if (!bfd_link_executable (info))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
asection *sreloc;
|
||
|
||
outrel.r_offset = rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset;
|
||
if (h != NULL && h->dynindx != -1)
|
||
indx = h->dynindx;
|
||
else
|
||
indx = 0;
|
||
if (r_type == R_386_TLS_LE_32)
|
||
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
|
||
else
|
||
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
if (sreloc == NULL)
|
||
abort ();
|
||
elf_append_rel (output_bfd, sreloc, &outrel);
|
||
if (indx)
|
||
continue;
|
||
else if (r_type == R_386_TLS_LE_32)
|
||
relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
|
||
else
|
||
relocation -= _bfd_x86_elf_dtpoff_base (info);
|
||
}
|
||
else if (r_type == R_386_TLS_LE_32)
|
||
relocation = elf_i386_tpoff (info, relocation);
|
||
else
|
||
relocation = -elf_i386_tpoff (info, relocation);
|
||
break;
|
||
|
||
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
|
||
/* xgettext:c-format */
|
||
(_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
(uint64_t) rel->r_offset,
|
||
howto->name,
|
||
h->root.root.string);
|
||
return FALSE;
|
||
}
|
||
|
||
do_relocation:
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, 0);
|
||
|
||
check_relocation_error:
|
||
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 (sec);
|
||
}
|
||
|
||
if (r == bfd_reloc_overflow)
|
||
(*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
else
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
|
||
input_bfd, input_section,
|
||
(uint64_t) rel->r_offset, name, (int) r);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (wrel != rel)
|
||
*wrel = *rel;
|
||
}
|
||
|
||
if (wrel != rel)
|
||
{
|
||
Elf_Internal_Shdr *rel_hdr;
|
||
size_t deleted = rel - wrel;
|
||
|
||
rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
|
||
rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
|
||
if (rel_hdr->sh_size == 0)
|
||
{
|
||
/* It is too late to remove an empty reloc section. Leave
|
||
one NONE reloc.
|
||
??? What is wrong with an empty section??? */
|
||
rel_hdr->sh_size = rel_hdr->sh_entsize;
|
||
deleted -= 1;
|
||
}
|
||
rel_hdr = _bfd_elf_single_rel_hdr (input_section);
|
||
rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
|
||
input_section->reloc_count -= deleted;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_finish_dynamic_symbol (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
struct elf_x86_link_hash_table *htab;
|
||
unsigned plt_entry_size;
|
||
struct elf_x86_link_hash_entry *eh;
|
||
bfd_boolean local_undefweak;
|
||
bfd_boolean use_plt_second;
|
||
|
||
htab = elf_x86_hash_table (info, I386_ELF_DATA);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
plt_entry_size = htab->plt.plt_entry_size;
|
||
|
||
/* Use the second PLT section only if there is .plt section. */
|
||
use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
|
||
|
||
eh = (struct elf_x86_link_hash_entry *) h;
|
||
if (eh->no_finish_dynamic_symbol)
|
||
abort ();
|
||
|
||
/* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
|
||
resolved undefined weak symbols in executable so that their
|
||
references have value 0 at run-time. */
|
||
local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_vma plt_index, plt_offset;
|
||
bfd_vma got_offset;
|
||
Elf_Internal_Rela rel;
|
||
bfd_byte *loc;
|
||
asection *plt, *resolved_plt, *gotplt, *relplt;
|
||
|
||
/* When building a static executable, use .iplt, .igot.plt and
|
||
.rel.iplt sections for STT_GNU_IFUNC symbols. */
|
||
if (htab->elf.splt != NULL)
|
||
{
|
||
plt = htab->elf.splt;
|
||
gotplt = htab->elf.sgotplt;
|
||
relplt = htab->elf.srelplt;
|
||
}
|
||
else
|
||
{
|
||
plt = htab->elf.iplt;
|
||
gotplt = htab->elf.igotplt;
|
||
relplt = htab->elf.irelplt;
|
||
}
|
||
|
||
VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
|
||
|
||
/* 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.
|
||
|
||
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.
|
||
|
||
For static executables, we don't reserve anything. */
|
||
|
||
if (plt == htab->elf.splt)
|
||
{
|
||
got_offset = (h->plt.offset / plt_entry_size
|
||
- htab->plt.has_plt0);
|
||
got_offset = (got_offset + 3) * 4;
|
||
}
|
||
else
|
||
{
|
||
got_offset = h->plt.offset / plt_entry_size;
|
||
got_offset = got_offset * 4;
|
||
}
|
||
|
||
/* Fill in the entry in the procedure linkage table and update
|
||
the first slot. */
|
||
memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
|
||
plt_entry_size);
|
||
|
||
if (use_plt_second)
|
||
{
|
||
const bfd_byte *plt_entry;
|
||
if (bfd_link_pic (info))
|
||
plt_entry = htab->non_lazy_plt->pic_plt_entry;
|
||
else
|
||
plt_entry = htab->non_lazy_plt->plt_entry;
|
||
memcpy (htab->plt_second->contents + eh->plt_second.offset,
|
||
plt_entry, htab->non_lazy_plt->plt_entry_size);
|
||
|
||
resolved_plt = htab->plt_second;
|
||
plt_offset = eh->plt_second.offset;
|
||
}
|
||
else
|
||
{
|
||
resolved_plt = plt;
|
||
plt_offset = h->plt.offset;
|
||
}
|
||
|
||
if (! bfd_link_pic (info))
|
||
{
|
||
bfd_put_32 (output_bfd,
|
||
(gotplt->output_section->vma
|
||
+ gotplt->output_offset
|
||
+ got_offset),
|
||
resolved_plt->contents + plt_offset
|
||
+ htab->plt.plt_got_offset);
|
||
|
||
if (htab->elf.target_os == is_vxworks)
|
||
{
|
||
int s, k, reloc_index;
|
||
|
||
/* Create the R_386_32 relocation referencing the GOT
|
||
for this PLT entry. */
|
||
|
||
/* S: Current slot number (zero-based). */
|
||
s = ((h->plt.offset - htab->plt.plt_entry_size)
|
||
/ htab->plt.plt_entry_size);
|
||
/* K: Number of relocations for PLTResolve. */
|
||
if (bfd_link_pic (info))
|
||
k = PLTRESOLVE_RELOCS_SHLIB;
|
||
else
|
||
k = PLTRESOLVE_RELOCS;
|
||
/* Skip the PLTresolve relocations, and the relocations for
|
||
the other PLT slots. */
|
||
reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
|
||
loc = (htab->srelplt2->contents + reloc_index
|
||
* sizeof (Elf32_External_Rel));
|
||
|
||
rel.r_offset = (plt->output_section->vma
|
||
+ plt->output_offset
|
||
+ h->plt.offset + 2),
|
||
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
|
||
|
||
/* Create the R_386_32 relocation referencing the beginning of
|
||
the PLT for this GOT entry. */
|
||
rel.r_offset = (htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset
|
||
+ got_offset);
|
||
rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel,
|
||
loc + sizeof (Elf32_External_Rel));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, got_offset,
|
||
resolved_plt->contents + plt_offset
|
||
+ htab->plt.plt_got_offset);
|
||
}
|
||
|
||
/* Fill in the entry in the global offset table. Leave the entry
|
||
as zero for undefined weak symbol in PIE. No PLT relocation
|
||
against undefined weak symbol in PIE. */
|
||
if (!local_undefweak)
|
||
{
|
||
if (htab->plt.has_plt0)
|
||
bfd_put_32 (output_bfd,
|
||
(plt->output_section->vma
|
||
+ plt->output_offset
|
||
+ h->plt.offset
|
||
+ htab->lazy_plt->plt_lazy_offset),
|
||
gotplt->contents + got_offset);
|
||
|
||
/* Fill in the entry in the .rel.plt section. */
|
||
rel.r_offset = (gotplt->output_section->vma
|
||
+ gotplt->output_offset
|
||
+ got_offset);
|
||
if (PLT_LOCAL_IFUNC_P (info, h))
|
||
{
|
||
info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
|
||
h->root.root.string,
|
||
h->root.u.def.section->owner);
|
||
|
||
/* If an STT_GNU_IFUNC symbol is locally defined, generate
|
||
R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
|
||
in the .got.plt section. */
|
||
bfd_put_32 (output_bfd,
|
||
(h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset),
|
||
gotplt->contents + got_offset);
|
||
rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
|
||
/* R_386_IRELATIVE comes last. */
|
||
plt_index = htab->next_irelative_index--;
|
||
}
|
||
else
|
||
{
|
||
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
|
||
plt_index = htab->next_jump_slot_index++;
|
||
}
|
||
|
||
loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
|
||
|
||
/* Don't fill the second and third slots in PLT entry for
|
||
static executables nor without PLT0. */
|
||
if (plt == htab->elf.splt && htab->plt.has_plt0)
|
||
{
|
||
bfd_put_32 (output_bfd,
|
||
plt_index * sizeof (Elf32_External_Rel),
|
||
plt->contents + h->plt.offset
|
||
+ htab->lazy_plt->plt_reloc_offset);
|
||
bfd_put_32 (output_bfd,
|
||
- (h->plt.offset
|
||
+ htab->lazy_plt->plt_plt_offset + 4),
|
||
(plt->contents + h->plt.offset
|
||
+ htab->lazy_plt->plt_plt_offset));
|
||
}
|
||
}
|
||
}
|
||
else if (eh->plt_got.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_vma got_offset, plt_offset;
|
||
asection *plt, *got, *gotplt;
|
||
const bfd_byte *got_plt_entry;
|
||
|
||
/* Set the entry in the GOT procedure linkage table. */
|
||
plt = htab->plt_got;
|
||
got = htab->elf.sgot;
|
||
gotplt = htab->elf.sgotplt;
|
||
got_offset = h->got.offset;
|
||
|
||
if (got_offset == (bfd_vma) -1
|
||
|| plt == NULL
|
||
|| got == NULL
|
||
|| gotplt == NULL)
|
||
abort ();
|
||
|
||
/* Fill in the entry in the GOT procedure linkage table. */
|
||
if (! bfd_link_pic (info))
|
||
{
|
||
got_plt_entry = htab->non_lazy_plt->plt_entry;
|
||
got_offset += got->output_section->vma + got->output_offset;
|
||
}
|
||
else
|
||
{
|
||
got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
|
||
got_offset += (got->output_section->vma
|
||
+ got->output_offset
|
||
- gotplt->output_section->vma
|
||
- gotplt->output_offset);
|
||
}
|
||
|
||
plt_offset = eh->plt_got.offset;
|
||
memcpy (plt->contents + plt_offset, got_plt_entry,
|
||
htab->non_lazy_plt->plt_entry_size);
|
||
bfd_put_32 (output_bfd, got_offset,
|
||
(plt->contents + plt_offset
|
||
+ htab->non_lazy_plt->plt_got_offset));
|
||
}
|
||
|
||
if (!local_undefweak
|
||
&& !h->def_regular
|
||
&& (h->plt.offset != (bfd_vma) -1
|
||
|| eh->plt_got.offset != (bfd_vma) -1))
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Leave the value if there were any
|
||
relocations where pointer equality matters (this is a clue
|
||
for the dynamic linker, to make function pointer
|
||
comparisons work between an application and shared
|
||
library), otherwise set it to zero. If a function is only
|
||
called from a binary, there is no need to slow down
|
||
shared libraries because of that. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
if (!h->pointer_equality_needed)
|
||
sym->st_value = 0;
|
||
}
|
||
|
||
_bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
|
||
|
||
/* Don't generate dynamic GOT relocation against undefined weak
|
||
symbol in executable. */
|
||
if (h->got.offset != (bfd_vma) -1
|
||
&& ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
|
||
&& (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
|
||
&& !local_undefweak)
|
||
{
|
||
Elf_Internal_Rela rel;
|
||
asection *relgot = htab->elf.srelgot;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
|
||
if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
|
||
abort ();
|
||
|
||
rel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset
|
||
+ (h->got.offset & ~(bfd_vma) 1));
|
||
|
||
/* If this is a static link, or it is a -Bsymbolic link and the
|
||
symbol is defined locally or was forced to be local because
|
||
of a version file, we just want to emit a RELATIVE reloc.
|
||
The entry in the global offset table will already have been
|
||
initialized in the relocate_section function. */
|
||
if (h->def_regular
|
||
&& h->type == STT_GNU_IFUNC)
|
||
{
|
||
if (h->plt.offset == (bfd_vma) -1)
|
||
{
|
||
/* STT_GNU_IFUNC is referenced without PLT. */
|
||
if (htab->elf.splt == NULL)
|
||
{
|
||
/* use .rel[a].iplt section to store .got relocations
|
||
in static executable. */
|
||
relgot = htab->elf.irelplt;
|
||
}
|
||
if (SYMBOL_REFERENCES_LOCAL_P (info, h))
|
||
{
|
||
info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
|
||
h->root.root.string,
|
||
h->root.u.def.section->owner);
|
||
|
||
bfd_put_32 (output_bfd,
|
||
(h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset),
|
||
htab->elf.sgot->contents + h->got.offset);
|
||
rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
|
||
}
|
||
else
|
||
goto do_glob_dat;
|
||
}
|
||
else if (bfd_link_pic (info))
|
||
{
|
||
/* Generate R_386_GLOB_DAT. */
|
||
goto do_glob_dat;
|
||
}
|
||
else
|
||
{
|
||
asection *plt;
|
||
bfd_vma plt_offset;
|
||
|
||
if (!h->pointer_equality_needed)
|
||
abort ();
|
||
|
||
/* For non-shared object, we can't use .got.plt, which
|
||
contains the real function addres if we need pointer
|
||
equality. We load the GOT entry with the PLT entry. */
|
||
if (htab->plt_second != NULL)
|
||
{
|
||
plt = htab->plt_second;
|
||
plt_offset = eh->plt_second.offset;
|
||
}
|
||
else
|
||
{
|
||
plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
|
||
plt_offset = h->plt.offset;
|
||
}
|
||
bfd_put_32 (output_bfd,
|
||
(plt->output_section->vma
|
||
+ plt->output_offset + plt_offset),
|
||
htab->elf.sgot->contents + h->got.offset);
|
||
return TRUE;
|
||
}
|
||
}
|
||
else if (bfd_link_pic (info)
|
||
&& SYMBOL_REFERENCES_LOCAL_P (info, h))
|
||
{
|
||
BFD_ASSERT((h->got.offset & 1) != 0);
|
||
rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT((h->got.offset & 1) == 0);
|
||
do_glob_dat:
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0,
|
||
htab->elf.sgot->contents + h->got.offset);
|
||
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
|
||
}
|
||
|
||
elf_append_rel (output_bfd, relgot, &rel);
|
||
}
|
||
|
||
if (h->needs_copy)
|
||
{
|
||
Elf_Internal_Rela rel;
|
||
asection *s;
|
||
|
||
/* This symbol needs a copy reloc. Set it up. */
|
||
VERIFY_COPY_RELOC (h, htab)
|
||
|
||
rel.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
|
||
if (h->root.u.def.section == htab->elf.sdynrelro)
|
||
s = htab->elf.sreldynrelro;
|
||
else
|
||
s = htab->elf.srelbss;
|
||
elf_append_rel (output_bfd, s, &rel);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up local dynamic symbol handling. We set the contents of
|
||
various dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
|
||
{
|
||
struct elf_link_hash_entry *h
|
||
= (struct elf_link_hash_entry *) *slot;
|
||
struct bfd_link_info *info
|
||
= (struct bfd_link_info *) inf;
|
||
|
||
return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
|
||
h, NULL);
|
||
}
|
||
|
||
/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
|
||
here since undefined weak symbol may not be dynamic and may not be
|
||
called for elf_i386_finish_dynamic_symbol. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
|
||
void *inf)
|
||
{
|
||
struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
|
||
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
||
|
||
if (h->root.type != bfd_link_hash_undefweak
|
||
|| h->dynindx != -1)
|
||
return TRUE;
|
||
|
||
return elf_i386_finish_dynamic_symbol (info->output_bfd,
|
||
info, h, NULL);
|
||
}
|
||
|
||
/* Used to decide how to sort relocs in an optimal manner for the
|
||
dynamic linker, before writing them out. */
|
||
|
||
static enum elf_reloc_type_class
|
||
elf_i386_reloc_type_class (const struct bfd_link_info *info,
|
||
const asection *rel_sec ATTRIBUTE_UNUSED,
|
||
const Elf_Internal_Rela *rela)
|
||
{
|
||
bfd *abfd = info->output_bfd;
|
||
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
struct elf_link_hash_table *htab = elf_hash_table (info);
|
||
|
||
if (htab->dynsym != NULL
|
||
&& htab->dynsym->contents != NULL)
|
||
{
|
||
/* Check relocation against STT_GNU_IFUNC symbol if there are
|
||
dynamic symbols. */
|
||
unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
|
||
if (r_symndx != STN_UNDEF)
|
||
{
|
||
Elf_Internal_Sym sym;
|
||
if (!bed->s->swap_symbol_in (abfd,
|
||
(htab->dynsym->contents
|
||
+ r_symndx * sizeof (Elf32_External_Sym)),
|
||
0, &sym))
|
||
abort ();
|
||
|
||
if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
|
||
return reloc_class_ifunc;
|
||
}
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rela->r_info))
|
||
{
|
||
case R_386_IRELATIVE:
|
||
return reloc_class_ifunc;
|
||
case R_386_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_386_JUMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_386_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_finish_dynamic_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf_x86_link_hash_table *htab;
|
||
|
||
htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
if (!htab->elf.dynamic_sections_created)
|
||
return TRUE;
|
||
|
||
if (htab->elf.splt && htab->elf.splt->size > 0)
|
||
{
|
||
/* UnixWare sets the entsize of .plt to 4, although that doesn't
|
||
really seem like the right value. */
|
||
elf_section_data (htab->elf.splt->output_section)
|
||
->this_hdr.sh_entsize = 4;
|
||
|
||
if (htab->plt.has_plt0)
|
||
{
|
||
/* Fill in the special first entry in the procedure linkage
|
||
table. */
|
||
memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
|
||
htab->lazy_plt->plt0_entry_size);
|
||
memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
|
||
htab->plt0_pad_byte,
|
||
htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
|
||
if (!bfd_link_pic (info))
|
||
{
|
||
bfd_put_32 (output_bfd,
|
||
(htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset
|
||
+ 4),
|
||
htab->elf.splt->contents
|
||
+ htab->lazy_plt->plt0_got1_offset);
|
||
bfd_put_32 (output_bfd,
|
||
(htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset
|
||
+ 8),
|
||
htab->elf.splt->contents
|
||
+ htab->lazy_plt->plt0_got2_offset);
|
||
|
||
if (htab->elf.target_os == is_vxworks)
|
||
{
|
||
Elf_Internal_Rela rel;
|
||
int num_plts = (htab->elf.splt->size
|
||
/ htab->plt.plt_entry_size) - 1;
|
||
unsigned char *p;
|
||
asection *srelplt2 = htab->srelplt2;
|
||
|
||
/* Generate a relocation for _GLOBAL_OFFSET_TABLE_
|
||
+ 4. On IA32 we use REL relocations so the
|
||
addend goes in the PLT directly. */
|
||
rel.r_offset = (htab->elf.splt->output_section->vma
|
||
+ htab->elf.splt->output_offset
|
||
+ htab->lazy_plt->plt0_got1_offset);
|
||
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
|
||
R_386_32);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel,
|
||
srelplt2->contents);
|
||
/* Generate a relocation for _GLOBAL_OFFSET_TABLE_
|
||
+ 8. */
|
||
rel.r_offset = (htab->elf.splt->output_section->vma
|
||
+ htab->elf.splt->output_offset
|
||
+ htab->lazy_plt->plt0_got2_offset);
|
||
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
|
||
R_386_32);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel,
|
||
srelplt2->contents +
|
||
sizeof (Elf32_External_Rel));
|
||
/* Correct the .rel.plt.unloaded relocations. */
|
||
p = srelplt2->contents;
|
||
if (bfd_link_pic (info))
|
||
p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
|
||
else
|
||
p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
|
||
|
||
for (; num_plts; num_plts--)
|
||
{
|
||
bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
|
||
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
|
||
R_386_32);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
|
||
p += sizeof (Elf32_External_Rel);
|
||
|
||
bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
|
||
rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
|
||
R_386_32);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
|
||
p += sizeof (Elf32_External_Rel);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Fill PLT entries for undefined weak symbols in PIE. */
|
||
if (bfd_link_pie (info))
|
||
bfd_hash_traverse (&info->hash->table,
|
||
elf_i386_pie_finish_undefweak_symbol,
|
||
info);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Fill PLT/GOT entries and allocate dynamic relocations for local
|
||
STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
|
||
It has to be done before elf_link_sort_relocs is called so that
|
||
dynamic relocations are properly sorted. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_output_arch_local_syms
|
||
(bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info,
|
||
void *flaginfo ATTRIBUTE_UNUSED,
|
||
int (*func) (void *, const char *,
|
||
Elf_Internal_Sym *,
|
||
asection *,
|
||
struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
|
||
{
|
||
struct elf_x86_link_hash_table *htab
|
||
= elf_x86_hash_table (info, I386_ELF_DATA);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
/* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
|
||
htab_traverse (htab->loc_hash_table,
|
||
elf_i386_finish_local_dynamic_symbol,
|
||
info);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
|
||
dynamic relocations. */
|
||
|
||
static long
|
||
elf_i386_get_synthetic_symtab (bfd *abfd,
|
||
long symcount ATTRIBUTE_UNUSED,
|
||
asymbol **syms ATTRIBUTE_UNUSED,
|
||
long dynsymcount,
|
||
asymbol **dynsyms,
|
||
asymbol **ret)
|
||
{
|
||
long count, i, n;
|
||
int j;
|
||
bfd_byte *plt_contents;
|
||
long relsize;
|
||
const struct elf_x86_lazy_plt_layout *lazy_plt;
|
||
const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
|
||
const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
|
||
const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
|
||
asection *plt;
|
||
bfd_vma got_addr;
|
||
enum elf_x86_plt_type plt_type;
|
||
struct elf_x86_plt plts[] =
|
||
{
|
||
{ ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
|
||
{ ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
|
||
{ ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
|
||
{ NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
|
||
};
|
||
|
||
*ret = NULL;
|
||
|
||
if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
|
||
return 0;
|
||
|
||
if (dynsymcount <= 0)
|
||
return 0;
|
||
|
||
relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
|
||
if (relsize <= 0)
|
||
return -1;
|
||
|
||
non_lazy_plt = NULL;
|
||
/* Silence GCC 6. */
|
||
lazy_plt = NULL;
|
||
non_lazy_ibt_plt = NULL;
|
||
lazy_ibt_plt = NULL;
|
||
switch (get_elf_backend_data (abfd)->target_os)
|
||
{
|
||
case is_normal:
|
||
case is_solaris:
|
||
non_lazy_plt = &elf_i386_non_lazy_plt;
|
||
lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
|
||
non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
|
||
/* Fall through */
|
||
case is_vxworks:
|
||
lazy_plt = &elf_i386_lazy_plt;
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
got_addr = 0;
|
||
|
||
count = 0;
|
||
for (j = 0; plts[j].name != NULL; j++)
|
||
{
|
||
plt = bfd_get_section_by_name (abfd, plts[j].name);
|
||
if (plt == NULL || plt->size == 0)
|
||
continue;
|
||
|
||
/* Get the PLT section contents. */
|
||
plt_contents = (bfd_byte *) bfd_malloc (plt->size);
|
||
if (plt_contents == NULL)
|
||
break;
|
||
if (!bfd_get_section_contents (abfd, (asection *) plt,
|
||
plt_contents, 0, plt->size))
|
||
{
|
||
free (plt_contents);
|
||
break;
|
||
}
|
||
|
||
/* Check what kind of PLT it is. */
|
||
plt_type = plt_unknown;
|
||
if (plts[j].type == plt_unknown
|
||
&& (plt->size >= (lazy_plt->plt0_entry_size
|
||
+ lazy_plt->plt_entry_size)))
|
||
{
|
||
/* Match lazy PLT first. */
|
||
if (memcmp (plt_contents, lazy_plt->plt0_entry,
|
||
lazy_plt->plt0_got1_offset) == 0)
|
||
{
|
||
/* The fist entry in the lazy IBT PLT is the same as the
|
||
normal lazy PLT. */
|
||
if (lazy_ibt_plt != NULL
|
||
&& (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
|
||
lazy_ibt_plt->plt_entry,
|
||
lazy_ibt_plt->plt_got_offset) == 0))
|
||
plt_type = plt_lazy | plt_second;
|
||
else
|
||
plt_type = plt_lazy;
|
||
}
|
||
else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
|
||
lazy_plt->plt0_got1_offset) == 0)
|
||
{
|
||
/* The fist entry in the PIC lazy IBT PLT is the same as
|
||
the normal PIC lazy PLT. */
|
||
if (lazy_ibt_plt != NULL
|
||
&& (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
|
||
lazy_ibt_plt->pic_plt_entry,
|
||
lazy_ibt_plt->plt_got_offset) == 0))
|
||
plt_type = plt_lazy | plt_pic | plt_second;
|
||
else
|
||
plt_type = plt_lazy | plt_pic;
|
||
}
|
||
}
|
||
|
||
if (non_lazy_plt != NULL
|
||
&& (plt_type == plt_unknown || plt_type == plt_non_lazy)
|
||
&& plt->size >= non_lazy_plt->plt_entry_size)
|
||
{
|
||
/* Match non-lazy PLT. */
|
||
if (memcmp (plt_contents, non_lazy_plt->plt_entry,
|
||
non_lazy_plt->plt_got_offset) == 0)
|
||
plt_type = plt_non_lazy;
|
||
else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
|
||
non_lazy_plt->plt_got_offset) == 0)
|
||
plt_type = plt_pic;
|
||
}
|
||
|
||
if ((non_lazy_ibt_plt != NULL)
|
||
&& (plt_type == plt_unknown || plt_type == plt_second)
|
||
&& plt->size >= non_lazy_ibt_plt->plt_entry_size)
|
||
{
|
||
if (memcmp (plt_contents,
|
||
non_lazy_ibt_plt->plt_entry,
|
||
non_lazy_ibt_plt->plt_got_offset) == 0)
|
||
{
|
||
/* Match IBT PLT. */
|
||
plt_type = plt_second;
|
||
non_lazy_plt = non_lazy_ibt_plt;
|
||
}
|
||
else if (memcmp (plt_contents,
|
||
non_lazy_ibt_plt->pic_plt_entry,
|
||
non_lazy_ibt_plt->plt_got_offset) == 0)
|
||
{
|
||
/* Match PIC IBT PLT. */
|
||
plt_type = plt_second | plt_pic;
|
||
non_lazy_plt = non_lazy_ibt_plt;
|
||
}
|
||
}
|
||
|
||
if (plt_type == plt_unknown)
|
||
{
|
||
free (plt_contents);
|
||
continue;
|
||
}
|
||
|
||
plts[j].sec = plt;
|
||
plts[j].type = plt_type;
|
||
|
||
if ((plt_type & plt_lazy))
|
||
{
|
||
plts[j].plt_got_offset = lazy_plt->plt_got_offset;
|
||
plts[j].plt_entry_size = lazy_plt->plt_entry_size;
|
||
/* Skip PLT0 in lazy PLT. */
|
||
i = 1;
|
||
}
|
||
else
|
||
{
|
||
plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
|
||
plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
|
||
i = 0;
|
||
}
|
||
|
||
/* Skip lazy PLT when the second PLT is used. */
|
||
if ((plt_type & (plt_lazy | plt_second))
|
||
== (plt_lazy | plt_second))
|
||
plts[j].count = 0;
|
||
else
|
||
{
|
||
n = plt->size / plts[j].plt_entry_size;
|
||
plts[j].count = n;
|
||
count += n - i;
|
||
}
|
||
|
||
plts[j].contents = plt_contents;
|
||
|
||
/* The _GLOBAL_OFFSET_TABLE_ address is needed. */
|
||
if ((plt_type & plt_pic))
|
||
got_addr = (bfd_vma) -1;
|
||
}
|
||
|
||
return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
|
||
got_addr, plts, dynsyms,
|
||
ret);
|
||
}
|
||
|
||
/* Set up i386 GNU properties. Return the first relocatable ELF input
|
||
with GNU properties if found. Otherwise, return NULL. */
|
||
|
||
static bfd *
|
||
elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
|
||
{
|
||
struct elf_x86_init_table init_table;
|
||
|
||
switch (get_elf_backend_data (info->output_bfd)->target_os)
|
||
{
|
||
case is_normal:
|
||
case is_solaris:
|
||
init_table.plt0_pad_byte = 0x0;
|
||
init_table.lazy_plt = &elf_i386_lazy_plt;
|
||
init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
|
||
init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
|
||
init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
|
||
break;
|
||
case is_vxworks:
|
||
init_table.plt0_pad_byte = 0x90;
|
||
init_table.lazy_plt = &elf_i386_lazy_plt;
|
||
init_table.non_lazy_plt = NULL;
|
||
init_table.lazy_ibt_plt = NULL;
|
||
init_table.non_lazy_ibt_plt = NULL;
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
init_table.r_info = elf32_r_info;
|
||
init_table.r_sym = elf32_r_sym;
|
||
|
||
return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
|
||
}
|
||
|
||
#define TARGET_LITTLE_SYM i386_elf32_vec
|
||
#define TARGET_LITTLE_NAME "elf32-i386"
|
||
#define ELF_ARCH bfd_arch_i386
|
||
#define ELF_TARGET_ID I386_ELF_DATA
|
||
#define ELF_MACHINE_CODE EM_386
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#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_plt_alignment 4
|
||
#define elf_backend_dtrel_excludes_plt 1
|
||
#define elf_backend_extern_protected_data 1
|
||
#define elf_backend_caches_rawsize 1
|
||
#define elf_backend_want_dynrelro 1
|
||
|
||
/* Support RELA for objdump of prelink objects. */
|
||
#define elf_info_to_howto elf_i386_info_to_howto_rel
|
||
#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
|
||
|
||
#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
|
||
#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
|
||
#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
|
||
#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
|
||
|
||
#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
|
||
#define elf_backend_check_relocs elf_i386_check_relocs
|
||
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
|
||
#define elf_backend_fake_sections elf_i386_fake_sections
|
||
#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
|
||
#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
|
||
#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
|
||
#define elf_backend_grok_prstatus elf_i386_grok_prstatus
|
||
#define elf_backend_grok_psinfo elf_i386_grok_psinfo
|
||
#define elf_backend_reloc_type_class elf_i386_reloc_type_class
|
||
#define elf_backend_relocate_section elf_i386_relocate_section
|
||
#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
|
||
#define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
|
||
|
||
#define elf_backend_linux_prpsinfo32_ugid16 TRUE
|
||
|
||
#define elf32_bed elf32_i386_bed
|
||
|
||
#include "elf32-target.h"
|
||
|
||
/* FreeBSD support. */
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
|
||
#undef TARGET_LITTLE_NAME
|
||
#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
|
||
#undef ELF_OSABI
|
||
#define ELF_OSABI ELFOSABI_FREEBSD
|
||
|
||
/* The kernel recognizes executables as valid only if they carry a
|
||
"FreeBSD" label in the ELF header. So we put this label on all
|
||
executables and (for simplicity) also all other object files. */
|
||
|
||
static bfd_boolean
|
||
elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
if (!_bfd_elf_init_file_header (abfd, info))
|
||
return FALSE;
|
||
|
||
#ifdef OLD_FREEBSD_ABI_LABEL
|
||
{
|
||
/* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
|
||
Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
|
||
memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
|
||
}
|
||
#endif
|
||
return TRUE;
|
||
}
|
||
|
||
#undef elf_backend_init_file_header
|
||
#define elf_backend_init_file_header elf_i386_fbsd_init_file_header
|
||
#undef elf32_bed
|
||
#define elf32_bed elf32_i386_fbsd_bed
|
||
|
||
#undef elf_backend_add_symbol_hook
|
||
|
||
#include "elf32-target.h"
|
||
|
||
#undef elf_backend_init_file_header
|
||
|
||
/* Solaris 2. */
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
|
||
#undef TARGET_LITTLE_NAME
|
||
#define TARGET_LITTLE_NAME "elf32-i386-sol2"
|
||
|
||
#undef ELF_TARGET_OS
|
||
#define ELF_TARGET_OS is_solaris
|
||
|
||
/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
|
||
objects won't be recognized. */
|
||
#undef ELF_OSABI
|
||
|
||
#undef elf32_bed
|
||
#define elf32_bed elf32_i386_sol2_bed
|
||
|
||
/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
|
||
boundary. */
|
||
#undef elf_backend_static_tls_alignment
|
||
#define elf_backend_static_tls_alignment 8
|
||
|
||
/* The Solaris 2 ABI requires a plt symbol on all platforms.
|
||
|
||
Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
|
||
File, p.63. */
|
||
#undef elf_backend_want_plt_sym
|
||
#define elf_backend_want_plt_sym 1
|
||
|
||
#undef elf_backend_strtab_flags
|
||
#define elf_backend_strtab_flags SHF_STRINGS
|
||
|
||
/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
|
||
has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
|
||
FALSE otherwise. ISECTION is the best guess matching section from the
|
||
input bfd IBFD, but it might be NULL. */
|
||
|
||
static bfd_boolean
|
||
elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
|
||
bfd *obfd ATTRIBUTE_UNUSED,
|
||
const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
|
||
{
|
||
/* PR 19938: FIXME: Need to add code for setting the sh_info
|
||
and sh_link fields of Solaris specific section types. */
|
||
return FALSE;
|
||
|
||
/* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
|
||
Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
|
||
|
||
http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
|
||
|
||
The following values should be set:
|
||
|
||
Type Link Info
|
||
-----------------------------------------------------------------------------
|
||
SHT_SUNW_ancillary The section header index of 0
|
||
[0x6fffffee] the associated string table.
|
||
|
||
SHT_SUNW_capinfo The section header index of For a dynamic object, the
|
||
[0x6ffffff0] the associated symbol table. section header index of
|
||
the associated
|
||
SHT_SUNW_capchain table,
|
||
otherwise 0.
|
||
|
||
SHT_SUNW_symsort The section header index of 0
|
||
[0x6ffffff1] the associated symbol table.
|
||
|
||
SHT_SUNW_tlssort The section header index of 0
|
||
[0x6ffffff2] the associated symbol table.
|
||
|
||
SHT_SUNW_LDYNSYM The section header index of One greater than the
|
||
[0x6ffffff3] the associated string table. symbol table index of the
|
||
This index is the same string last local symbol,
|
||
table used by the SHT_DYNSYM STB_LOCAL. Since
|
||
section. SHT_SUNW_LDYNSYM only
|
||
contains local symbols,
|
||
sh_info is equivalent to
|
||
the number of symbols in
|
||
the table.
|
||
|
||
SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
|
||
[0x6ffffff5] the section header index of to named strings, the
|
||
the associated section header index of
|
||
SHT_SUNW_capinfo table, the associated string
|
||
otherwise 0. table, otherwise 0.
|
||
|
||
SHT_SUNW_move The section header index of 0
|
||
[0x6ffffffa] the associated symbol table.
|
||
|
||
SHT_SUNW_COMDAT 0 0
|
||
[0x6ffffffb]
|
||
|
||
SHT_SUNW_syminfo The section header index of The section header index
|
||
[0x6ffffffc] the associated symbol table. of the associated
|
||
.dynamic section.
|
||
|
||
SHT_SUNW_verdef The section header index of The number of version
|
||
[0x6ffffffd] the associated string table. definitions within the
|
||
section.
|
||
|
||
SHT_SUNW_verneed The section header index of The number of version
|
||
[0x6ffffffe] the associated string table. dependencies within the
|
||
section.
|
||
|
||
SHT_SUNW_versym The section header index of 0
|
||
[0x6fffffff] the associated symbol table. */
|
||
}
|
||
|
||
#undef elf_backend_copy_special_section_fields
|
||
#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
|
||
|
||
#include "elf32-target.h"
|
||
|
||
/* Intel MCU support. */
|
||
|
||
static bfd_boolean
|
||
elf32_iamcu_elf_object_p (bfd *abfd)
|
||
{
|
||
/* Set the right machine number for an IAMCU elf32 file. */
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
|
||
return TRUE;
|
||
}
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#define TARGET_LITTLE_SYM iamcu_elf32_vec
|
||
#undef TARGET_LITTLE_NAME
|
||
#define TARGET_LITTLE_NAME "elf32-iamcu"
|
||
#undef ELF_ARCH
|
||
#define ELF_ARCH bfd_arch_iamcu
|
||
|
||
#undef ELF_MACHINE_CODE
|
||
#define ELF_MACHINE_CODE EM_IAMCU
|
||
|
||
#undef ELF_TARGET_OS
|
||
#undef ELF_OSABI
|
||
|
||
#undef elf32_bed
|
||
#define elf32_bed elf32_iamcu_bed
|
||
|
||
#undef elf_backend_object_p
|
||
#define elf_backend_object_p elf32_iamcu_elf_object_p
|
||
|
||
#undef elf_backend_static_tls_alignment
|
||
|
||
#undef elf_backend_want_plt_sym
|
||
#define elf_backend_want_plt_sym 0
|
||
|
||
#undef elf_backend_strtab_flags
|
||
#undef elf_backend_copy_special_section_fields
|
||
|
||
#include "elf32-target.h"
|
||
|
||
/* Restore defaults. */
|
||
#undef ELF_ARCH
|
||
#define ELF_ARCH bfd_arch_i386
|
||
#undef ELF_MACHINE_CODE
|
||
#define ELF_MACHINE_CODE EM_386
|
||
#undef elf_backend_object_p
|
||
|
||
/* VxWorks support. */
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
|
||
#undef TARGET_LITTLE_NAME
|
||
#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
|
||
#undef ELF_OSABI
|
||
#undef ELF_MAXPAGESIZE
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
#undef elf_backend_plt_alignment
|
||
#define elf_backend_plt_alignment 4
|
||
|
||
#undef ELF_TARGET_OS
|
||
#define ELF_TARGET_OS is_vxworks
|
||
|
||
#undef elf_backend_relocs_compatible
|
||
#undef elf_backend_add_symbol_hook
|
||
#define elf_backend_add_symbol_hook \
|
||
elf_vxworks_add_symbol_hook
|
||
#undef elf_backend_link_output_symbol_hook
|
||
#define elf_backend_link_output_symbol_hook \
|
||
elf_vxworks_link_output_symbol_hook
|
||
#undef elf_backend_emit_relocs
|
||
#define elf_backend_emit_relocs elf_vxworks_emit_relocs
|
||
#undef elf_backend_final_write_processing
|
||
#define elf_backend_final_write_processing \
|
||
elf_vxworks_final_write_processing
|
||
#undef elf_backend_static_tls_alignment
|
||
|
||
/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
|
||
define it. */
|
||
#undef elf_backend_want_plt_sym
|
||
#define elf_backend_want_plt_sym 1
|
||
|
||
#undef elf32_bed
|
||
#define elf32_bed elf32_i386_vxworks_bed
|
||
|
||
#include "elf32-target.h"
|