| 1 | /* Intel i386 Mach-O support for BFD. |
| 2 | Copyright 2009 |
| 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 | #include "mach-o/reloc.h" |
| 28 | |
| 29 | #define bfd_mach_o_object_p bfd_mach_o_i386_object_p |
| 30 | #define bfd_mach_o_core_p bfd_mach_o_i386_core_p |
| 31 | #define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject |
| 32 | |
| 33 | static const bfd_target * |
| 34 | bfd_mach_o_i386_object_p (bfd *abfd) |
| 35 | { |
| 36 | return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_I386); |
| 37 | } |
| 38 | |
| 39 | static const bfd_target * |
| 40 | bfd_mach_o_i386_core_p (bfd *abfd) |
| 41 | { |
| 42 | return bfd_mach_o_header_p (abfd, |
| 43 | BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386); |
| 44 | } |
| 45 | |
| 46 | static bfd_boolean |
| 47 | bfd_mach_o_i386_mkobject (bfd *abfd) |
| 48 | { |
| 49 | bfd_mach_o_data_struct *mdata; |
| 50 | |
| 51 | if (!bfd_mach_o_mkobject_init (abfd)) |
| 52 | return FALSE; |
| 53 | |
| 54 | mdata = bfd_mach_o_get_data (abfd); |
| 55 | mdata->header.magic = BFD_MACH_O_MH_MAGIC; |
| 56 | mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386; |
| 57 | mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL; |
| 58 | mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
| 59 | mdata->header.version = 1; |
| 60 | |
| 61 | return TRUE; |
| 62 | } |
| 63 | |
| 64 | static reloc_howto_type i386_howto_table[]= |
| 65 | { |
| 66 | HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0, |
| 67 | complain_overflow_bitfield, |
| 68 | NULL, "32", |
| 69 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 70 | HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0, |
| 71 | complain_overflow_bitfield, |
| 72 | NULL, "16", |
| 73 | FALSE, 0xffff, 0xffff, FALSE), |
| 74 | HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0, |
| 75 | complain_overflow_bitfield, |
| 76 | NULL, "8", |
| 77 | FALSE, 0xff, 0xff, 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_16_PCREL, 0, 1, 16, TRUE, 0, |
| 83 | complain_overflow_bitfield, |
| 84 | NULL, "DISP16", |
| 85 | FALSE, 0xffff, 0xffff, TRUE), |
| 86 | HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0, |
| 87 | complain_overflow_bitfield, |
| 88 | NULL, "SECTDIFF_32", |
| 89 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 90 | HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0, |
| 91 | complain_overflow_bitfield, |
| 92 | NULL, "PAIR_32", |
| 93 | FALSE, 0xffffffff, 0xffffffff, FALSE), |
| 94 | }; |
| 95 | |
| 96 | static bfd_boolean |
| 97 | bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc) |
| 98 | { |
| 99 | if (reloc->r_scattered) |
| 100 | { |
| 101 | switch (reloc->r_type) |
| 102 | { |
| 103 | case BFD_MACH_O_GENERIC_RELOC_PAIR: |
| 104 | if (reloc->r_length != 2) |
| 105 | return FALSE; |
| 106 | res->howto = &i386_howto_table[6]; |
| 107 | res->address = res[-1].address; |
| 108 | return TRUE; |
| 109 | case BFD_MACH_O_GENERIC_RELOC_SECTDIFF: |
| 110 | case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF: |
| 111 | if (reloc->r_length != 2) |
| 112 | return FALSE; |
| 113 | res->howto = &i386_howto_table[5]; |
| 114 | return TRUE; |
| 115 | default: |
| 116 | return FALSE; |
| 117 | } |
| 118 | } |
| 119 | else |
| 120 | { |
| 121 | switch (reloc->r_type) |
| 122 | { |
| 123 | case BFD_MACH_O_GENERIC_RELOC_VANILLA: |
| 124 | switch ((reloc->r_length << 1) | reloc->r_pcrel) |
| 125 | { |
| 126 | case 0: /* len = 0, pcrel = 0 */ |
| 127 | res->howto = &i386_howto_table[2]; |
| 128 | return TRUE; |
| 129 | case 2: /* len = 1, pcrel = 0 */ |
| 130 | res->howto = &i386_howto_table[1]; |
| 131 | return TRUE; |
| 132 | case 3: /* len = 1, pcrel = 1 */ |
| 133 | res->howto = &i386_howto_table[4]; |
| 134 | return TRUE; |
| 135 | case 4: /* len = 2, pcrel = 0 */ |
| 136 | res->howto = &i386_howto_table[0]; |
| 137 | return TRUE; |
| 138 | case 5: /* len = 2, pcrel = 1 */ |
| 139 | res->howto = &i386_howto_table[3]; |
| 140 | return TRUE; |
| 141 | default: |
| 142 | return FALSE; |
| 143 | } |
| 144 | break; |
| 145 | default: |
| 146 | return FALSE; |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | static bfd_boolean |
| 152 | bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) |
| 153 | { |
| 154 | rinfo->r_address = rel->address; |
| 155 | switch (rel->howto->type) |
| 156 | { |
| 157 | case BFD_RELOC_32: |
| 158 | case BFD_RELOC_32_PCREL: |
| 159 | case BFD_RELOC_16: |
| 160 | case BFD_RELOC_16_PCREL: |
| 161 | case BFD_RELOC_8: |
| 162 | rinfo->r_scattered = 0; |
| 163 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA; |
| 164 | rinfo->r_pcrel = rel->howto->pc_relative; |
| 165 | rinfo->r_length = rel->howto->size; /* Correct in practice. */ |
| 166 | if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) |
| 167 | { |
| 168 | rinfo->r_extern = 0; |
| 169 | rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index; |
| 170 | } |
| 171 | else |
| 172 | { |
| 173 | rinfo->r_extern = 1; |
| 174 | rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; |
| 175 | } |
| 176 | break; |
| 177 | case BFD_RELOC_MACH_O_SECTDIFF: |
| 178 | rinfo->r_scattered = 1; |
| 179 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF; |
| 180 | rinfo->r_pcrel = 0; |
| 181 | rinfo->r_length = 2; |
| 182 | rinfo->r_extern = 0; |
| 183 | rinfo->r_value = (*rel->sym_ptr_ptr)->value |
| 184 | + (*rel->sym_ptr_ptr)->section->vma; |
| 185 | break; |
| 186 | case BFD_RELOC_MACH_O_PAIR: |
| 187 | rinfo->r_address = 0; |
| 188 | rinfo->r_scattered = 1; |
| 189 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR; |
| 190 | rinfo->r_pcrel = 0; |
| 191 | rinfo->r_length = 2; |
| 192 | rinfo->r_extern = 0; |
| 193 | rinfo->r_value = (*rel->sym_ptr_ptr)->value |
| 194 | + (*rel->sym_ptr_ptr)->section->vma; |
| 195 | break; |
| 196 | default: |
| 197 | return FALSE; |
| 198 | } |
| 199 | return TRUE; |
| 200 | } |
| 201 | |
| 202 | static reloc_howto_type * |
| 203 | bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 204 | bfd_reloc_code_real_type code) |
| 205 | { |
| 206 | unsigned int i; |
| 207 | |
| 208 | for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++) |
| 209 | if (code == i386_howto_table[i].type) |
| 210 | return &i386_howto_table[i]; |
| 211 | return NULL; |
| 212 | } |
| 213 | |
| 214 | static reloc_howto_type * |
| 215 | bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 216 | const char *name ATTRIBUTE_UNUSED) |
| 217 | { |
| 218 | return NULL; |
| 219 | } |
| 220 | |
| 221 | static bfd_boolean |
| 222 | bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread, |
| 223 | void *vfile, char *buf) |
| 224 | { |
| 225 | FILE *file = (FILE *)vfile; |
| 226 | |
| 227 | switch (thread->flavour) |
| 228 | { |
| 229 | case BFD_MACH_O_x86_THREAD_STATE: |
| 230 | if (thread->size < (8 + 16 * 4)) |
| 231 | return FALSE; |
| 232 | fprintf (file, " x86_THREAD_STATE:\n"); |
| 233 | fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| 234 | (unsigned long)bfd_get_32 (abfd, buf + 0), |
| 235 | (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| 236 | fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n", |
| 237 | (unsigned long)bfd_get_32 (abfd, buf + 8), |
| 238 | (unsigned long)bfd_get_32 (abfd, buf + 12), |
| 239 | (unsigned long)bfd_get_32 (abfd, buf + 16), |
| 240 | (unsigned long)bfd_get_32 (abfd, buf + 20)); |
| 241 | fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n", |
| 242 | (unsigned long)bfd_get_32 (abfd, buf + 24), |
| 243 | (unsigned long)bfd_get_32 (abfd, buf + 28), |
| 244 | (unsigned long)bfd_get_32 (abfd, buf + 32), |
| 245 | (unsigned long)bfd_get_32 (abfd, buf + 36)); |
| 246 | fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n", |
| 247 | (unsigned long)bfd_get_32 (abfd, buf + 40), |
| 248 | (unsigned long)bfd_get_32 (abfd, buf + 44), |
| 249 | (unsigned long)bfd_get_32 (abfd, buf + 48), |
| 250 | (unsigned long)bfd_get_32 (abfd, buf + 52)); |
| 251 | fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n", |
| 252 | (unsigned long)bfd_get_32 (abfd, buf + 56), |
| 253 | (unsigned long)bfd_get_32 (abfd, buf + 60), |
| 254 | (unsigned long)bfd_get_32 (abfd, buf + 64), |
| 255 | (unsigned long)bfd_get_32 (abfd, buf + 68)); |
| 256 | return TRUE; |
| 257 | case BFD_MACH_O_x86_FLOAT_STATE: |
| 258 | if (thread->size < 8) |
| 259 | return FALSE; |
| 260 | fprintf (file, " x86_FLOAT_STATE:\n"); |
| 261 | fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| 262 | (unsigned long)bfd_get_32 (abfd, buf + 0), |
| 263 | (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| 264 | return TRUE; |
| 265 | case BFD_MACH_O_x86_EXCEPTION_STATE: |
| 266 | if (thread->size < 8 + 3 * 4) |
| 267 | return FALSE; |
| 268 | fprintf (file, " x86_EXCEPTION_STATE:\n"); |
| 269 | fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n", |
| 270 | (unsigned long)bfd_get_32 (abfd, buf + 0), |
| 271 | (unsigned long)bfd_get_32 (abfd, buf + 4)); |
| 272 | fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n", |
| 273 | (unsigned long)bfd_get_32 (abfd, buf + 8), |
| 274 | (unsigned long)bfd_get_32 (abfd, buf + 12), |
| 275 | (unsigned long)bfd_get_32 (abfd, buf + 16)); |
| 276 | return TRUE; |
| 277 | default: |
| 278 | break; |
| 279 | } |
| 280 | return FALSE; |
| 281 | } |
| 282 | |
| 283 | #define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in |
| 284 | #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out |
| 285 | #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread |
| 286 | |
| 287 | #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup |
| 288 | #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup |
| 289 | |
| 290 | #define TARGET_NAME mach_o_i386_vec |
| 291 | #define TARGET_STRING "mach-o-i386" |
| 292 | #define TARGET_ARCHITECTURE bfd_arch_i386 |
| 293 | #define TARGET_BIG_ENDIAN 0 |
| 294 | #define TARGET_ARCHIVE 0 |
| 295 | #include "mach-o-target.c" |