| 1 | /* Intel x86-64 Mach-O support for BFD. |
| 2 | Copyright 2010 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "mach-o.h" |
| 24 | #include "bfd.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "libiberty.h" |
| 27 | |
| 28 | #define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p |
| 29 | #define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p |
| 30 | #define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject |
| 31 | |
| 32 | static const bfd_target * |
| 33 | bfd_mach_o_x86_64_object_p (bfd *abfd) |
| 34 | { |
| 35 | return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_X86_64); |
| 36 | } |
| 37 | |
| 38 | static const bfd_target * |
| 39 | bfd_mach_o_x86_64_core_p (bfd *abfd) |
| 40 | { |
| 41 | return bfd_mach_o_header_p (abfd, |
| 42 | BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64); |
| 43 | } |
| 44 | |
| 45 | static bfd_boolean |
| 46 | bfd_mach_o_x86_64_mkobject (bfd *abfd) |
| 47 | { |
| 48 | bfd_mach_o_data_struct *mdata; |
| 49 | |
| 50 | if (!bfd_mach_o_mkobject_init (abfd)) |
| 51 | return FALSE; |
| 52 | |
| 53 | mdata = bfd_mach_o_get_data (abfd); |
| 54 | mdata->header.magic = BFD_MACH_O_MH_MAGIC; |
| 55 | mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64; |
| 56 | mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL; |
| 57 | mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
| 58 | mdata->header.version = 1; |
| 59 | |
| 60 | return TRUE; |
| 61 | } |
| 62 | |
| 63 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 64 | #define MINUS_ONE (~ (bfd_vma) 0) |
| 65 | |
| 66 | static reloc_howto_type x86_64_howto_table[]= |
| 67 | { |
| 68 | /* 0 */ |
| 69 | HOWTO(BFD_RELOC_64, 0, 4, 64, FALSE, 0, |
| 70 | complain_overflow_bitfield, |
| 71 | NULL, "64", |
| 72 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), |
| 73 | HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0, |
| 74 | complain_overflow_bitfield, |
| 75 | NULL, "32", |
| 76 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 77 | HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, |
| 78 | complain_overflow_bitfield, |
| 79 | NULL, "DISP32", |
| 80 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 81 | HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0, |
| 82 | complain_overflow_bitfield, |
| 83 | NULL, "DISP32_1", |
| 84 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 85 | /* 4 */ |
| 86 | HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0, |
| 87 | complain_overflow_bitfield, |
| 88 | NULL, "DISP32_2", |
| 89 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 90 | HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0, |
| 91 | complain_overflow_bitfield, |
| 92 | NULL, "DISP32_4", |
| 93 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 94 | HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0, |
| 95 | complain_overflow_bitfield, |
| 96 | NULL, "BRANCH32", |
| 97 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 98 | HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0, |
| 99 | complain_overflow_bitfield, |
| 100 | NULL, "GOT_LOAD", |
| 101 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 102 | /* 8 */ |
| 103 | HOWTO(BFD_RELOC_MACH_O_X86_64_SUBTRACTOR32, 0, 2, 32, FALSE, 0, |
| 104 | complain_overflow_bitfield, |
| 105 | NULL, "SUBTRACTOR32", |
| 106 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 107 | HOWTO(BFD_RELOC_MACH_O_X86_64_SUBTRACTOR64, 0, 4, 64, FALSE, 0, |
| 108 | complain_overflow_bitfield, |
| 109 | NULL, "SUBTRACTOR64", |
| 110 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), |
| 111 | HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, TRUE, 0, |
| 112 | complain_overflow_bitfield, |
| 113 | NULL, "GOT", |
| 114 | FALSE, 0xffffffff, 0xffffffff, TRUE), |
| 115 | HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0, |
| 116 | complain_overflow_bitfield, |
| 117 | NULL, "BRANCH8", |
| 118 | FALSE, 0xff, 0xff, TRUE), |
| 119 | }; |
| 120 | |
| 121 | static bfd_boolean |
| 122 | bfd_mach_o_x86_64_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc) |
| 123 | { |
| 124 | /* On x86-64, scattered relocs are not used. */ |
| 125 | if (reloc->r_scattered) |
| 126 | return FALSE; |
| 127 | |
| 128 | switch (reloc->r_type) |
| 129 | { |
| 130 | case BFD_MACH_O_X86_64_RELOC_UNSIGNED: |
| 131 | if (reloc->r_pcrel) |
| 132 | return FALSE; |
| 133 | switch (reloc->r_length) |
| 134 | { |
| 135 | case 2: |
| 136 | res->howto = &x86_64_howto_table[1]; |
| 137 | return TRUE; |
| 138 | case 3: |
| 139 | res->howto = &x86_64_howto_table[0]; |
| 140 | return TRUE; |
| 141 | default: |
| 142 | return FALSE; |
| 143 | } |
| 144 | case BFD_MACH_O_X86_64_RELOC_SIGNED: |
| 145 | if (reloc->r_length == 2 && reloc->r_pcrel) |
| 146 | { |
| 147 | res->howto = &x86_64_howto_table[2]; |
| 148 | return TRUE; |
| 149 | } |
| 150 | break; |
| 151 | case BFD_MACH_O_X86_64_RELOC_BRANCH: |
| 152 | if (!reloc->r_pcrel) |
| 153 | return FALSE; |
| 154 | switch (reloc->r_length) |
| 155 | { |
| 156 | case 2: |
| 157 | res->howto = &x86_64_howto_table[6]; |
| 158 | return TRUE; |
| 159 | default: |
| 160 | return FALSE; |
| 161 | } |
| 162 | break; |
| 163 | case BFD_MACH_O_X86_64_RELOC_GOT_LOAD: |
| 164 | if (reloc->r_length == 2 && reloc->r_pcrel && reloc->r_extern) |
| 165 | { |
| 166 | res->howto = &x86_64_howto_table[7]; |
| 167 | return TRUE; |
| 168 | } |
| 169 | break; |
| 170 | case BFD_MACH_O_X86_64_RELOC_GOT: |
| 171 | if (reloc->r_length == 2 && reloc->r_pcrel && reloc->r_extern) |
| 172 | { |
| 173 | res->howto = &x86_64_howto_table[10]; |
| 174 | return TRUE; |
| 175 | } |
| 176 | break; |
| 177 | case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR: |
| 178 | if (reloc->r_pcrel) |
| 179 | return FALSE; |
| 180 | switch (reloc->r_length) |
| 181 | { |
| 182 | case 2: |
| 183 | res->howto = &x86_64_howto_table[8]; |
| 184 | return TRUE; |
| 185 | case 3: |
| 186 | res->howto = &x86_64_howto_table[9]; |
| 187 | return TRUE; |
| 188 | default: |
| 189 | return FALSE; |
| 190 | } |
| 191 | break; |
| 192 | case BFD_MACH_O_X86_64_RELOC_SIGNED_1: |
| 193 | if (reloc->r_length == 2 && reloc->r_pcrel) |
| 194 | { |
| 195 | res->howto = &x86_64_howto_table[3]; |
| 196 | return TRUE; |
| 197 | } |
| 198 | break; |
| 199 | case BFD_MACH_O_X86_64_RELOC_SIGNED_2: |
| 200 | if (reloc->r_length == 2 && reloc->r_pcrel) |
| 201 | { |
| 202 | res->howto = &x86_64_howto_table[4]; |
| 203 | return TRUE; |
| 204 | } |
| 205 | break; |
| 206 | case BFD_MACH_O_X86_64_RELOC_SIGNED_4: |
| 207 | if (reloc->r_length == 2 && reloc->r_pcrel) |
| 208 | { |
| 209 | res->howto = &x86_64_howto_table[5]; |
| 210 | return TRUE; |
| 211 | } |
| 212 | break; |
| 213 | default: |
| 214 | return FALSE; |
| 215 | } |
| 216 | return FALSE; |
| 217 | } |
| 218 | |
| 219 | static bfd_boolean |
| 220 | bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) |
| 221 | { |
| 222 | rinfo->r_address = rel->address; |
| 223 | switch (rel->howto->type) |
| 224 | { |
| 225 | case BFD_RELOC_64: |
| 226 | rinfo->r_scattered = 0; |
| 227 | rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; |
| 228 | rinfo->r_pcrel = 0; |
| 229 | rinfo->r_length = rel->howto->size; /* Correct in practice. */ |
| 230 | if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) |
| 231 | { |
| 232 | rinfo->r_extern = 0; |
| 233 | rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index; |
| 234 | } |
| 235 | else |
| 236 | { |
| 237 | rinfo->r_extern = 1; |
| 238 | rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; |
| 239 | } |
| 240 | break; |
| 241 | default: |
| 242 | return FALSE; |
| 243 | } |
| 244 | return TRUE; |
| 245 | } |
| 246 | |
| 247 | static reloc_howto_type * |
| 248 | bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 249 | bfd_reloc_code_real_type code) |
| 250 | { |
| 251 | unsigned int i; |
| 252 | |
| 253 | for (i = 0; |
| 254 | i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table); |
| 255 | i++) |
| 256 | if (code == x86_64_howto_table[i].type) |
| 257 | return &x86_64_howto_table[i]; |
| 258 | return NULL; |
| 259 | } |
| 260 | |
| 261 | static reloc_howto_type * |
| 262 | bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 263 | const char *name ATTRIBUTE_UNUSED) |
| 264 | { |
| 265 | return NULL; |
| 266 | } |
| 267 | |
| 268 | #define bfd_mach_o_swap_reloc_in bfd_mach_o_x86_64_swap_reloc_in |
| 269 | #define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out |
| 270 | |
| 271 | #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup |
| 272 | #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup |
| 273 | #define bfd_mach_o_print_thread NULL |
| 274 | |
| 275 | #define TARGET_NAME mach_o_x86_64_vec |
| 276 | #define TARGET_STRING "mach-o-x86-64" |
| 277 | #define TARGET_ARCHITECTURE bfd_arch_i386 |
| 278 | #define TARGET_BIG_ENDIAN 0 |
| 279 | #define TARGET_ARCHIVE 0 |
| 280 | #include "mach-o-target.c" |