| /* Intel x86-64 Mach-O support for BFD. |
| Copyright (C) 2010-2021 Free Software Foundation, Inc. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "libiberty.h" |
| #include "mach-o.h" |
| #include "mach-o/x86-64.h" |
| |
| #define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p |
| #define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p |
| #define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject |
| |
| static bfd_cleanup |
| bfd_mach_o_x86_64_object_p (bfd *abfd) |
| { |
| return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_X86_64); |
| } |
| |
| static bfd_cleanup |
| bfd_mach_o_x86_64_core_p (bfd *abfd) |
| { |
| return bfd_mach_o_header_p (abfd, 0, |
| BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64); |
| } |
| |
| static bool |
| bfd_mach_o_x86_64_mkobject (bfd *abfd) |
| { |
| bfd_mach_o_data_struct *mdata; |
| |
| if (!bfd_mach_o_mkobject_init (abfd)) |
| return false; |
| |
| mdata = bfd_mach_o_get_data (abfd); |
| mdata->header.magic = BFD_MACH_O_MH_MAGIC_64; |
| mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64; |
| mdata->header.cpusubtype = |
| BFD_MACH_O_CPU_SUBTYPE_X86_ALL | BFD_MACH_O_CPU_SUBTYPE_LIB64; |
| mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
| mdata->header.version = 2; |
| |
| return true; |
| } |
| |
| /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| #define MINUS_ONE (~ (bfd_vma) 0) |
| |
| static reloc_howto_type x86_64_howto_table[]= |
| { |
| /* 0 */ |
| HOWTO(BFD_RELOC_64, 0, 4, 64, false, 0, |
| complain_overflow_bitfield, |
| NULL, "64", |
| false, MINUS_ONE, MINUS_ONE, false), |
| HOWTO(BFD_RELOC_32, 0, 2, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32", |
| false, 0xffffffff, 0xffffffff, true), |
| HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32_1", |
| false, 0xffffffff, 0xffffffff, true), |
| /* 4 */ |
| HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32_2", |
| false, 0xffffffff, 0xffffffff, true), |
| HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32_4", |
| false, 0xffffffff, 0xffffffff, true), |
| HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "BRANCH32", |
| false, 0xffffffff, 0xffffffff, true), |
| HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "GOT_LOAD", |
| false, 0xffffffff, 0xffffffff, true), |
| /* 8 */ |
| HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SUBTRACTOR32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SUBTRACTOR64", |
| false, MINUS_ONE, MINUS_ONE, false), |
| HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "GOT", |
| false, 0xffffffff, 0xffffffff, true), |
| HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, true, 0, |
| complain_overflow_bitfield, |
| NULL, "BRANCH8", |
| false, 0xff, 0xff, true), |
| /* 12 */ |
| HOWTO(BFD_RELOC_MACH_O_X86_64_TLV, 0, 2, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "TLV", |
| false, 0xffffffff, 0xffffffff, true), |
| }; |
| |
| static bool |
| bfd_mach_o_x86_64_canonicalize_one_reloc (bfd * abfd, |
| struct mach_o_reloc_info_external * raw, |
| arelent * res, |
| asymbol ** syms, |
| arelent * res_base ATTRIBUTE_UNUSED) |
| { |
| bfd_mach_o_reloc_info reloc; |
| |
| if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms)) |
| return false; |
| |
| /* On x86-64, scattered relocs are not used. */ |
| if (reloc.r_scattered) |
| return false; |
| |
| switch (reloc.r_type) |
| { |
| case BFD_MACH_O_X86_64_RELOC_UNSIGNED: |
| if (reloc.r_pcrel) |
| return false; |
| switch (reloc.r_length) |
| { |
| case 2: |
| res->howto = &x86_64_howto_table[1]; |
| return true; |
| case 3: |
| res->howto = &x86_64_howto_table[0]; |
| return true; |
| default: |
| return false; |
| } |
| case BFD_MACH_O_X86_64_RELOC_SIGNED: |
| if (reloc.r_length == 2 && reloc.r_pcrel) |
| { |
| res->howto = &x86_64_howto_table[2]; |
| return true; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_BRANCH: |
| if (!reloc.r_pcrel) |
| return false; |
| switch (reloc.r_length) |
| { |
| case 2: |
| res->howto = &x86_64_howto_table[6]; |
| return true; |
| default: |
| return false; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_GOT_LOAD: |
| if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) |
| { |
| res->howto = &x86_64_howto_table[7]; |
| return true; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_GOT: |
| if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) |
| { |
| res->howto = &x86_64_howto_table[10]; |
| return true; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR: |
| if (reloc.r_pcrel) |
| return false; |
| switch (reloc.r_length) |
| { |
| case 2: |
| res->howto = &x86_64_howto_table[8]; |
| return true; |
| case 3: |
| res->howto = &x86_64_howto_table[9]; |
| return true; |
| default: |
| return false; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_SIGNED_1: |
| if (reloc.r_length == 2 && reloc.r_pcrel) |
| { |
| res->howto = &x86_64_howto_table[3]; |
| return true; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_SIGNED_2: |
| if (reloc.r_length == 2 && reloc.r_pcrel) |
| { |
| res->howto = &x86_64_howto_table[4]; |
| return true; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_SIGNED_4: |
| if (reloc.r_length == 2 && reloc.r_pcrel) |
| { |
| res->howto = &x86_64_howto_table[5]; |
| return true; |
| } |
| break; |
| case BFD_MACH_O_X86_64_RELOC_TLV: |
| if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) |
| { |
| res->howto = &x86_64_howto_table[12]; |
| return true; |
| } |
| break; |
| default: |
| return false; |
| } |
| return false; |
| } |
| |
| static bool |
| bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) |
| { |
| rinfo->r_address = rel->address; |
| rinfo->r_scattered = 0; |
| switch (rel->howto->type) |
| { |
| case BFD_RELOC_32: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_64: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = 3; |
| break; |
| case BFD_RELOC_32_PCREL: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_PCREL32_1: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_1; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_PCREL32_2: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_2; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_PCREL32_4: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_4; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_BRANCH32: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_BRANCH; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_SUBTRACTOR32: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_SUBTRACTOR64: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = 3; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_GOT: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_GOT_LOAD: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT_LOAD; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| case BFD_RELOC_MACH_O_X86_64_TLV: |
| rinfo->r_type = BFD_MACH_O_X86_64_RELOC_TLV; |
| rinfo->r_pcrel = 1; |
| rinfo->r_length = 2; |
| break; |
| default: |
| return false; |
| } |
| if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) |
| { |
| rinfo->r_extern = 0; |
| rinfo->r_value = |
| (*rel->sym_ptr_ptr)->section->output_section->target_index; |
| } |
| else |
| { |
| rinfo->r_extern = 1; |
| rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; |
| } |
| return true; |
| } |
| |
| static reloc_howto_type * |
| bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table); |
| i++) |
| if (code == x86_64_howto_table[i].type) |
| return &x86_64_howto_table[i]; |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *name ATTRIBUTE_UNUSED) |
| { |
| return NULL; |
| } |
| |
| static bool |
| bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val) |
| { |
| if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS |
| || val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS |
| || val == BFD_MACH_O_S_SYMBOL_STUBS) |
| return false; |
| return true; |
| } |
| |
| /* We want to bump the alignment of some sections. */ |
| static const mach_o_section_name_xlat text_section_names_xlat[] = |
| { |
| { ".eh_frame", "__eh_frame", |
| SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED, |
| BFD_MACH_O_S_ATTR_LIVE_SUPPORT |
| | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS |
| | BFD_MACH_O_S_ATTR_NO_TOC, 3}, |
| { NULL, NULL, 0, 0, 0, 0} |
| }; |
| |
| const mach_o_segment_name_xlat mach_o_x86_64_segsec_names_xlat[] = |
| { |
| { "__TEXT", text_section_names_xlat }, |
| { NULL, NULL } |
| }; |
| |
| #define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_x86_64_canonicalize_one_reloc |
| #define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out |
| |
| #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup |
| #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup |
| #define bfd_mach_o_print_thread NULL |
| #define bfd_mach_o_tgt_seg_table mach_o_x86_64_segsec_names_xlat |
| #define bfd_mach_o_section_type_valid_for_tgt bfd_mach_o_section_type_valid_for_x86_64 |
| |
| #define TARGET_NAME x86_64_mach_o_vec |
| #define TARGET_STRING "mach-o-x86-64" |
| #define TARGET_ARCHITECTURE bfd_arch_i386 |
| #define TARGET_PAGESIZE 4096 |
| #define TARGET_BIG_ENDIAN 0 |
| #define TARGET_ARCHIVE 0 |
| #define TARGET_PRIORITY 0 |
| #include "mach-o-target.c" |
