diff options
Diffstat (limited to 'bfd/mach-o-x86-64.c')
| -rw-r--r-- | bfd/mach-o-x86-64.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/bfd/mach-o-x86-64.c b/bfd/mach-o-x86-64.c new file mode 100644 index 0000000..c0042cb --- /dev/null +++ b/bfd/mach-o-x86-64.c @@ -0,0 +1,363 @@ +/* Intel x86-64 Mach-O support for BFD. + Copyright (C) 2010-2014 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 "mach-o.h" +#include "bfd.h" +#include "libbfd.h" +#include "libiberty.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 const bfd_target * +bfd_mach_o_x86_64_object_p (bfd *abfd) +{ + return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_X86_64); +} + +static const bfd_target * +bfd_mach_o_x86_64_core_p (bfd *abfd) +{ + return bfd_mach_o_header_p (abfd, + BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64); +} + +static bfd_boolean +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_X86_64_SUBTRACTOR32, 0, 2, 32, FALSE, 0, + complain_overflow_bitfield, + NULL, "SUBTRACTOR32", + FALSE, 0xffffffff, 0xffffffff, FALSE), + HOWTO(BFD_RELOC_MACH_O_X86_64_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), +}; + +static bfd_boolean +bfd_mach_o_x86_64_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc) +{ + /* 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; + default: + return FALSE; + } + return FALSE; +} + +static bfd_boolean +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_X86_64_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_X86_64_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; + 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 bfd_boolean +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_swap_reloc_in bfd_mach_o_x86_64_swap_reloc_in +#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" |