| /* Intel i386 Mach-O support for BFD. |
| Copyright (C) 2009-2022 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/reloc.h" |
| |
| #define bfd_mach_o_object_p bfd_mach_o_i386_object_p |
| #define bfd_mach_o_core_p bfd_mach_o_i386_core_p |
| #define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject |
| |
| static bfd_cleanup |
| bfd_mach_o_i386_object_p (bfd *abfd) |
| { |
| return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_I386); |
| } |
| |
| static bfd_cleanup |
| bfd_mach_o_i386_core_p (bfd *abfd) |
| { |
| return bfd_mach_o_header_p (abfd, 0, |
| BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386); |
| } |
| |
| static bool |
| bfd_mach_o_i386_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; |
| mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386; |
| mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL; |
| mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
| mdata->header.version = 1; |
| |
| return true; |
| } |
| |
| static reloc_howto_type i386_howto_table[]= |
| { |
| /* 0 */ |
| HOWTO(BFD_RELOC_32, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO(BFD_RELOC_16, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "16", |
| false, 0xffff, 0xffff, false), |
| HOWTO(BFD_RELOC_8, 0, 1, 8, false, 0, |
| complain_overflow_bitfield, |
| NULL, "8", |
| false, 0xff, 0xff, false), |
| HOWTO(BFD_RELOC_32_PCREL, 0, 4, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32", |
| false, 0xffffffff, 0xffffffff, true), |
| /* 4 */ |
| HOWTO(BFD_RELOC_16_PCREL, 0, 2, 16, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP16", |
| false, 0xffff, 0xffff, true), |
| HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SECTDIFF_32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "LSECTDIFF_32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "PAIR_32", |
| false, 0xffffffff, 0xffffffff, false), |
| /* 8 */ |
| HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SECTDIFF_16", |
| false, 0xffff, 0xffff, false), |
| HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "LSECTDIFF_16", |
| false, 0xffff, 0xffff, false), |
| HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "PAIR_16", |
| false, 0xffff, 0xffff, false), |
| }; |
| |
| static bool |
| bfd_mach_o_i386_canonicalize_one_reloc (bfd * abfd, |
| struct mach_o_reloc_info_external * raw, |
| arelent * res, |
| asymbol ** syms, |
| arelent * res_base) |
| { |
| bfd_mach_o_reloc_info reloc; |
| |
| if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms)) |
| return false; |
| |
| if (reloc.r_scattered) |
| { |
| switch (reloc.r_type) |
| { |
| case BFD_MACH_O_GENERIC_RELOC_PAIR: |
| /* PR 21813: Check for a corrupt PAIR reloc at the start. */ |
| if (res == res_base) |
| return false; |
| if (reloc.r_length == 2) |
| { |
| res->howto = &i386_howto_table[7]; |
| res->address = res[-1].address; |
| return true; |
| } |
| else if (reloc.r_length == 1) |
| { |
| res->howto = &i386_howto_table[10]; |
| res->address = res[-1].address; |
| return true; |
| } |
| return false; |
| case BFD_MACH_O_GENERIC_RELOC_SECTDIFF: |
| if (reloc.r_length == 2) |
| { |
| res->howto = &i386_howto_table[5]; |
| return true; |
| } |
| else if (reloc.r_length == 1) |
| { |
| res->howto = &i386_howto_table[8]; |
| return true; |
| } |
| return false; |
| case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF: |
| if (reloc.r_length == 2) |
| { |
| res->howto = &i386_howto_table[6]; |
| return true; |
| } |
| else if (reloc.r_length == 1) |
| { |
| res->howto = &i386_howto_table[9]; |
| return true; |
| } |
| return false; |
| default: |
| break; |
| } |
| } |
| else |
| { |
| switch (reloc.r_type) |
| { |
| case BFD_MACH_O_GENERIC_RELOC_VANILLA: |
| switch ((reloc.r_length << 1) | reloc.r_pcrel) |
| { |
| case 0: /* len = 0, pcrel = 0 */ |
| res->howto = &i386_howto_table[2]; |
| return true; |
| case 2: /* len = 1, pcrel = 0 */ |
| res->howto = &i386_howto_table[1]; |
| return true; |
| case 3: /* len = 1, pcrel = 1 */ |
| res->howto = &i386_howto_table[4]; |
| return true; |
| case 4: /* len = 2, pcrel = 0 */ |
| res->howto = &i386_howto_table[0]; |
| return true; |
| case 5: /* len = 2, pcrel = 1 */ |
| res->howto = &i386_howto_table[3]; |
| return true; |
| default: |
| return false; |
| } |
| default: |
| break; |
| } |
| } |
| return false; |
| } |
| |
| static bool |
| bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) |
| { |
| rinfo->r_address = rel->address; |
| switch (rel->howto->type) |
| { |
| case BFD_RELOC_32: |
| case BFD_RELOC_32_PCREL: |
| case BFD_RELOC_16: |
| case BFD_RELOC_16_PCREL: |
| case BFD_RELOC_8: |
| rinfo->r_scattered = 0; |
| rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA; |
| rinfo->r_pcrel = rel->howto->pc_relative; |
| rinfo->r_length = bfd_log2 (bfd_get_reloc_size (rel->howto)); |
| 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; |
| } |
| break; |
| case BFD_RELOC_MACH_O_SECTDIFF: |
| rinfo->r_scattered = 1; |
| rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = bfd_log2 (bfd_get_reloc_size (rel->howto)); |
| rinfo->r_extern = 0; |
| rinfo->r_value = rel->addend; |
| break; |
| case BFD_RELOC_MACH_O_LOCAL_SECTDIFF: |
| rinfo->r_scattered = 1; |
| rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = bfd_log2 (bfd_get_reloc_size (rel->howto)); |
| rinfo->r_extern = 0; |
| rinfo->r_value = rel->addend; |
| break; |
| case BFD_RELOC_MACH_O_PAIR: |
| rinfo->r_address = 0; |
| rinfo->r_scattered = 1; |
| rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR; |
| rinfo->r_pcrel = 0; |
| rinfo->r_length = bfd_log2 (bfd_get_reloc_size (rel->howto)); |
| rinfo->r_extern = 0; |
| rinfo->r_value = rel->addend; |
| break; |
| default: |
| return false; |
| } |
| return true; |
| } |
| |
| static reloc_howto_type * |
| bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++) |
| if (code == i386_howto_table[i].type) |
| return &i386_howto_table[i]; |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *name ATTRIBUTE_UNUSED) |
| { |
| return NULL; |
| } |
| |
| static bool |
| bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread, |
| void *vfile, char *buf) |
| { |
| FILE *file = (FILE *)vfile; |
| |
| switch (thread->flavour) |
| { |
| case BFD_MACH_O_x86_THREAD_STATE: |
| if (thread->size < (8 + 16 * 4)) |
| return false; |
| fprintf (file, " x86_THREAD_STATE:\n"); |
| fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 0), |
| (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 8), |
| (unsigned long)bfd_get_32 (abfd, buf + 12), |
| (unsigned long)bfd_get_32 (abfd, buf + 16), |
| (unsigned long)bfd_get_32 (abfd, buf + 20)); |
| fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 24), |
| (unsigned long)bfd_get_32 (abfd, buf + 28), |
| (unsigned long)bfd_get_32 (abfd, buf + 32), |
| (unsigned long)bfd_get_32 (abfd, buf + 36)); |
| fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 40), |
| (unsigned long)bfd_get_32 (abfd, buf + 44), |
| (unsigned long)bfd_get_32 (abfd, buf + 48), |
| (unsigned long)bfd_get_32 (abfd, buf + 52)); |
| fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 56), |
| (unsigned long)bfd_get_32 (abfd, buf + 60), |
| (unsigned long)bfd_get_32 (abfd, buf + 64), |
| (unsigned long)bfd_get_32 (abfd, buf + 68)); |
| return true; |
| case BFD_MACH_O_x86_FLOAT_STATE: |
| if (thread->size < 8) |
| return false; |
| fprintf (file, " x86_FLOAT_STATE:\n"); |
| fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 0), |
| (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| return true; |
| case BFD_MACH_O_x86_EXCEPTION_STATE: |
| if (thread->size < 8 + 3 * 4) |
| return false; |
| fprintf (file, " x86_EXCEPTION_STATE:\n"); |
| fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 0), |
| (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n", |
| (unsigned long)bfd_get_32 (abfd, buf + 8), |
| (unsigned long)bfd_get_32 (abfd, buf + 12), |
| (unsigned long)bfd_get_32 (abfd, buf + 16)); |
| return true; |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| static const mach_o_section_name_xlat text_section_names_xlat[] = |
| { |
| { ".symbol_stub", "__symbol_stub", |
| SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS, |
| BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, |
| 0}, |
| { ".picsymbol_stub", "__picsymbol_stub", |
| SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS, |
| BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, |
| 0}, |
| { NULL, NULL, 0, 0, 0, 0} |
| }; |
| |
| static const mach_o_section_name_xlat data_section_names_xlat[] = |
| { |
| /* The first two are recognized by i386, but not emitted for x86 by |
| modern GCC. */ |
| { ".non_lazy_symbol_pointer", "__nl_symbol_ptr", |
| SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS, |
| BFD_MACH_O_S_ATTR_NONE, 2}, |
| { ".lazy_symbol_pointer", "__la_symbol_ptr", |
| SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS, |
| BFD_MACH_O_S_ATTR_NONE, 2}, |
| { ".lazy_symbol_pointer2", "__la_sym_ptr2", |
| SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS, |
| BFD_MACH_O_S_ATTR_NONE, 2}, |
| { ".lazy_symbol_pointer3", "__la_sym_ptr3", |
| SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS, |
| BFD_MACH_O_S_ATTR_NONE, 2}, |
| { NULL, NULL, 0, 0, 0, 0} |
| }; |
| |
| static const mach_o_section_name_xlat import_section_names_xlat[] = |
| { |
| { ".picsymbol_stub3", "__jump_table", |
| SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS, |
| BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS |
| | BFD_MACH_O_S_SELF_MODIFYING_CODE, |
| 6}, |
| { ".non_lazy_symbol_pointer_x86", "__pointers", |
| SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS, |
| BFD_MACH_O_S_ATTR_NONE, 2}, |
| { NULL, NULL, 0, 0, 0, 0} |
| }; |
| |
| const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] = |
| { |
| { "__TEXT", text_section_names_xlat }, |
| { "__DATA", data_section_names_xlat }, |
| { "__IMPORT", import_section_names_xlat }, |
| { NULL, NULL } |
| }; |
| |
| #define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_i386_canonicalize_one_reloc |
| #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out |
| #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread |
| |
| #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat |
| #define bfd_mach_o_section_type_valid_for_tgt NULL |
| |
| #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup |
| #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup |
| |
| #define TARGET_NAME i386_mach_o_vec |
| #define TARGET_STRING "mach-o-i386" |
| #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" |
