1/* Intel x86-64 Mach-O support for BFD. 2 Copyright (C) 2010-2017 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21#include "sysdep.h" 22#include "mach-o.h" 23#include "bfd.h" 24#include "libbfd.h" 25#include "libiberty.h" 26#include "mach-o/x86-64.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 32static const bfd_target * 33bfd_mach_o_x86_64_object_p (bfd *abfd) 34{ 35 return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_X86_64); 36} 37 38static const bfd_target * 39bfd_mach_o_x86_64_core_p (bfd *abfd) 40{ 41 return bfd_mach_o_header_p (abfd, 0, 42 BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64); 43} 44 45static bfd_boolean 46bfd_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_64; 55 mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64; 56 mdata->header.cpusubtype = 57 BFD_MACH_O_CPU_SUBTYPE_X86_ALL | BFD_MACH_O_CPU_SUBTYPE_LIB64; 58 mdata->header.byteorder = BFD_ENDIAN_LITTLE; 59 mdata->header.version = 2; 60 61 return TRUE; 62} 63 64/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ 65#define MINUS_ONE (~ (bfd_vma) 0) 66 67static reloc_howto_type x86_64_howto_table[]= 68{ 69 /* 0 */ 70 HOWTO(BFD_RELOC_64, 0, 4, 64, FALSE, 0, 71 complain_overflow_bitfield, 72 NULL, "64", 73 FALSE, MINUS_ONE, MINUS_ONE, FALSE), 74 HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0, 75 complain_overflow_bitfield, 76 NULL, "32", 77 FALSE, 0xffffffff, 0xffffffff, FALSE), 78 HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, 79 complain_overflow_bitfield, 80 NULL, "DISP32", 81 FALSE, 0xffffffff, 0xffffffff, TRUE), 82 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0, 83 complain_overflow_bitfield, 84 NULL, "DISP32_1", 85 FALSE, 0xffffffff, 0xffffffff, TRUE), 86 /* 4 */ 87 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0, 88 complain_overflow_bitfield, 89 NULL, "DISP32_2", 90 FALSE, 0xffffffff, 0xffffffff, TRUE), 91 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0, 92 complain_overflow_bitfield, 93 NULL, "DISP32_4", 94 FALSE, 0xffffffff, 0xffffffff, TRUE), 95 HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0, 96 complain_overflow_bitfield, 97 NULL, "BRANCH32", 98 FALSE, 0xffffffff, 0xffffffff, TRUE), 99 HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0, 100 complain_overflow_bitfield, 101 NULL, "GOT_LOAD", 102 FALSE, 0xffffffff, 0xffffffff, TRUE), 103 /* 8 */ 104 HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, FALSE, 0, 105 complain_overflow_bitfield, 106 NULL, "SUBTRACTOR32", 107 FALSE, 0xffffffff, 0xffffffff, FALSE), 108 HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, FALSE, 0, 109 complain_overflow_bitfield, 110 NULL, "SUBTRACTOR64", 111 FALSE, MINUS_ONE, MINUS_ONE, FALSE), 112 HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, TRUE, 0, 113 complain_overflow_bitfield, 114 NULL, "GOT", 115 FALSE, 0xffffffff, 0xffffffff, TRUE), 116 HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0, 117 complain_overflow_bitfield, 118 NULL, "BRANCH8", 119 FALSE, 0xff, 0xff, TRUE), 120}; 121 122static bfd_boolean 123bfd_mach_o_x86_64_canonicalize_one_reloc (bfd *abfd, 124 struct mach_o_reloc_info_external *raw, 125 arelent *res, asymbol **syms) 126{ 127 bfd_mach_o_reloc_info reloc; 128 129 if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms)) 130 return FALSE; 131 132 /* On x86-64, scattered relocs are not used. */ 133 if (reloc.r_scattered) 134 return FALSE; 135 136 switch (reloc.r_type) 137 { 138 case BFD_MACH_O_X86_64_RELOC_UNSIGNED: 139 if (reloc.r_pcrel) 140 return FALSE; 141 switch (reloc.r_length) 142 { 143 case 2: 144 res->howto = &x86_64_howto_table[1]; 145 return TRUE; 146 case 3: 147 res->howto = &x86_64_howto_table[0]; 148 return TRUE; 149 default: 150 return FALSE; 151 } 152 case BFD_MACH_O_X86_64_RELOC_SIGNED: 153 if (reloc.r_length == 2 && reloc.r_pcrel) 154 { 155 res->howto = &x86_64_howto_table[2]; 156 return TRUE; 157 } 158 break; 159 case BFD_MACH_O_X86_64_RELOC_BRANCH: 160 if (!reloc.r_pcrel) 161 return FALSE; 162 switch (reloc.r_length) 163 { 164 case 2: 165 res->howto = &x86_64_howto_table[6]; 166 return TRUE; 167 default: 168 return FALSE; 169 } 170 break; 171 case BFD_MACH_O_X86_64_RELOC_GOT_LOAD: 172 if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) 173 { 174 res->howto = &x86_64_howto_table[7]; 175 return TRUE; 176 } 177 break; 178 case BFD_MACH_O_X86_64_RELOC_GOT: 179 if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) 180 { 181 res->howto = &x86_64_howto_table[10]; 182 return TRUE; 183 } 184 break; 185 case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR: 186 if (reloc.r_pcrel) 187 return FALSE; 188 switch (reloc.r_length) 189 { 190 case 2: 191 res->howto = &x86_64_howto_table[8]; 192 return TRUE; 193 case 3: 194 res->howto = &x86_64_howto_table[9]; 195 return TRUE; 196 default: 197 return FALSE; 198 } 199 break; 200 case BFD_MACH_O_X86_64_RELOC_SIGNED_1: 201 if (reloc.r_length == 2 && reloc.r_pcrel) 202 { 203 res->howto = &x86_64_howto_table[3]; 204 return TRUE; 205 } 206 break; 207 case BFD_MACH_O_X86_64_RELOC_SIGNED_2: 208 if (reloc.r_length == 2 && reloc.r_pcrel) 209 { 210 res->howto = &x86_64_howto_table[4]; 211 return TRUE; 212 } 213 break; 214 case BFD_MACH_O_X86_64_RELOC_SIGNED_4: 215 if (reloc.r_length == 2 && reloc.r_pcrel) 216 { 217 res->howto = &x86_64_howto_table[5]; 218 return TRUE; 219 } 220 break; 221 default: 222 return FALSE; 223 } 224 return FALSE; 225} 226 227static bfd_boolean 228bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) 229{ 230 rinfo->r_address = rel->address; 231 rinfo->r_scattered = 0; 232 switch (rel->howto->type) 233 { 234 case BFD_RELOC_32: 235 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; 236 rinfo->r_pcrel = 0; 237 rinfo->r_length = 2; 238 break; 239 case BFD_RELOC_64: 240 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; 241 rinfo->r_pcrel = 0; 242 rinfo->r_length = 3; 243 break; 244 case BFD_RELOC_32_PCREL: 245 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED; 246 rinfo->r_pcrel = 1; 247 rinfo->r_length = 2; 248 break; 249 case BFD_RELOC_MACH_O_X86_64_PCREL32_1: 250 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_1; 251 rinfo->r_pcrel = 1; 252 rinfo->r_length = 2; 253 break; 254 case BFD_RELOC_MACH_O_X86_64_PCREL32_2: 255 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_2; 256 rinfo->r_pcrel = 1; 257 rinfo->r_length = 2; 258 break; 259 case BFD_RELOC_MACH_O_X86_64_PCREL32_4: 260 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_4; 261 rinfo->r_pcrel = 1; 262 rinfo->r_length = 2; 263 break; 264 case BFD_RELOC_MACH_O_X86_64_BRANCH32: 265 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_BRANCH; 266 rinfo->r_pcrel = 1; 267 rinfo->r_length = 2; 268 break; 269 case BFD_RELOC_MACH_O_SUBTRACTOR32: 270 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR; 271 rinfo->r_pcrel = 0; 272 rinfo->r_length = 2; 273 break; 274 case BFD_RELOC_MACH_O_SUBTRACTOR64: 275 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR; 276 rinfo->r_pcrel = 0; 277 rinfo->r_length = 3; 278 break; 279 case BFD_RELOC_MACH_O_X86_64_GOT: 280 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT; 281 rinfo->r_pcrel = 1; 282 rinfo->r_length = 2; 283 break; 284 case BFD_RELOC_MACH_O_X86_64_GOT_LOAD: 285 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT_LOAD; 286 rinfo->r_pcrel = 1; 287 rinfo->r_length = 2; 288 break; 289 default: 290 return FALSE; 291 } 292 if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) 293 { 294 rinfo->r_extern = 0; 295 rinfo->r_value = 296 (*rel->sym_ptr_ptr)->section->output_section->target_index; 297 } 298 else 299 { 300 rinfo->r_extern = 1; 301 rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; 302 } 303 return TRUE; 304} 305 306static reloc_howto_type * 307bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 308 bfd_reloc_code_real_type code) 309{ 310 unsigned int i; 311 312 for (i = 0; 313 i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table); 314 i++) 315 if (code == x86_64_howto_table[i].type) 316 return &x86_64_howto_table[i]; 317 return NULL; 318} 319 320static reloc_howto_type * 321bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 322 const char *name ATTRIBUTE_UNUSED) 323{ 324 return NULL; 325} 326 327static bfd_boolean 328bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val) 329{ 330 if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS 331 || val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS 332 || val == BFD_MACH_O_S_SYMBOL_STUBS) 333 return FALSE; 334 return TRUE; 335} 336 337/* We want to bump the alignment of some sections. */ 338static const mach_o_section_name_xlat text_section_names_xlat[] = 339 { 340 { ".eh_frame", "__eh_frame", 341 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED, 342 BFD_MACH_O_S_ATTR_LIVE_SUPPORT 343 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS 344 | BFD_MACH_O_S_ATTR_NO_TOC, 3}, 345 { NULL, NULL, 0, 0, 0, 0} 346 }; 347 348const mach_o_segment_name_xlat mach_o_x86_64_segsec_names_xlat[] = 349 { 350 { "__TEXT", text_section_names_xlat }, 351 { NULL, NULL } 352 }; 353 354#define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_x86_64_canonicalize_one_reloc 355#define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out 356 357#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup 358#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup 359#define bfd_mach_o_print_thread NULL 360#define bfd_mach_o_tgt_seg_table mach_o_x86_64_segsec_names_xlat 361#define bfd_mach_o_section_type_valid_for_tgt bfd_mach_o_section_type_valid_for_x86_64 362 363#define TARGET_NAME x86_64_mach_o_vec 364#define TARGET_STRING "mach-o-x86-64" 365#define TARGET_ARCHITECTURE bfd_arch_i386 366#define TARGET_PAGESIZE 4096 367#define TARGET_BIG_ENDIAN 0 368#define TARGET_ARCHIVE 0 369#define TARGET_PRIORITY 0 370#include "mach-o-target.c" 371