1 /* Intel i386 Mach-O support for BFD.
2 Copyright (C) 2009-2018 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
25 #include "libiberty.h"
26 #include "mach-o/reloc.h"
28 #define bfd_mach_o_object_p bfd_mach_o_i386_object_p
29 #define bfd_mach_o_core_p bfd_mach_o_i386_core_p
30 #define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject
32 static const bfd_target *
33 bfd_mach_o_i386_object_p (bfd *abfd)
35 return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_I386);
38 static const bfd_target *
39 bfd_mach_o_i386_core_p (bfd *abfd)
41 return bfd_mach_o_header_p (abfd, 0,
42 BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386);
46 bfd_mach_o_i386_mkobject (bfd *abfd)
48 bfd_mach_o_data_struct *mdata;
50 if (!bfd_mach_o_mkobject_init (abfd))
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_I386;
56 mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL;
57 mdata->header.byteorder = BFD_ENDIAN_LITTLE;
58 mdata->header.version = 1;
63 static reloc_howto_type i386_howto_table[]=
66 HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
67 complain_overflow_bitfield,
69 FALSE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0,
71 complain_overflow_bitfield,
73 FALSE, 0xffff, 0xffff, FALSE),
74 HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0,
75 complain_overflow_bitfield,
77 FALSE, 0xff, 0xff, FALSE),
78 HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
79 complain_overflow_bitfield,
81 FALSE, 0xffffffff, 0xffffffff, TRUE),
83 HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
84 complain_overflow_bitfield,
86 FALSE, 0xffff, 0xffff, TRUE),
87 HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
88 complain_overflow_bitfield,
90 FALSE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
92 complain_overflow_bitfield,
94 FALSE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
96 complain_overflow_bitfield,
98 FALSE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
101 complain_overflow_bitfield,
103 FALSE, 0xffff, 0xffff, FALSE),
104 HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0,
105 complain_overflow_bitfield,
106 NULL, "LSECTDIFF_16",
107 FALSE, 0xffff, 0xffff, FALSE),
108 HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0,
109 complain_overflow_bitfield,
111 FALSE, 0xffff, 0xffff, FALSE),
115 bfd_mach_o_i386_canonicalize_one_reloc (bfd * abfd,
116 struct mach_o_reloc_info_external * raw,
121 bfd_mach_o_reloc_info reloc;
123 if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
126 if (reloc.r_scattered)
128 switch (reloc.r_type)
130 case BFD_MACH_O_GENERIC_RELOC_PAIR:
131 /* PR 21813: Check for a corrupt PAIR reloc at the start. */
134 if (reloc.r_length == 2)
136 res->howto = &i386_howto_table[7];
137 res->address = res[-1].address;
140 else if (reloc.r_length == 1)
142 res->howto = &i386_howto_table[10];
143 res->address = res[-1].address;
147 case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
148 if (reloc.r_length == 2)
150 res->howto = &i386_howto_table[5];
153 else if (reloc.r_length == 1)
155 res->howto = &i386_howto_table[8];
159 case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
160 if (reloc.r_length == 2)
162 res->howto = &i386_howto_table[6];
165 else if (reloc.r_length == 1)
167 res->howto = &i386_howto_table[9];
177 switch (reloc.r_type)
179 case BFD_MACH_O_GENERIC_RELOC_VANILLA:
180 switch ((reloc.r_length << 1) | reloc.r_pcrel)
182 case 0: /* len = 0, pcrel = 0 */
183 res->howto = &i386_howto_table[2];
185 case 2: /* len = 1, pcrel = 0 */
186 res->howto = &i386_howto_table[1];
188 case 3: /* len = 1, pcrel = 1 */
189 res->howto = &i386_howto_table[4];
191 case 4: /* len = 2, pcrel = 0 */
192 res->howto = &i386_howto_table[0];
194 case 5: /* len = 2, pcrel = 1 */
195 res->howto = &i386_howto_table[3];
208 bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
210 rinfo->r_address = rel->address;
211 switch (rel->howto->type)
214 case BFD_RELOC_32_PCREL:
216 case BFD_RELOC_16_PCREL:
218 rinfo->r_scattered = 0;
219 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
220 rinfo->r_pcrel = rel->howto->pc_relative;
221 rinfo->r_length = rel->howto->size; /* Correct in practice. */
222 if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
226 (*rel->sym_ptr_ptr)->section->output_section->target_index;
231 rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
234 case BFD_RELOC_MACH_O_SECTDIFF:
235 rinfo->r_scattered = 1;
236 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
238 rinfo->r_length = rel->howto->size;
240 rinfo->r_value = rel->addend;
242 case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
243 rinfo->r_scattered = 1;
244 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
246 rinfo->r_length = rel->howto->size;
248 rinfo->r_value = rel->addend;
250 case BFD_RELOC_MACH_O_PAIR:
251 rinfo->r_address = 0;
252 rinfo->r_scattered = 1;
253 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
255 rinfo->r_length = rel->howto->size;
257 rinfo->r_value = rel->addend;
265 static reloc_howto_type *
266 bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
267 bfd_reloc_code_real_type code)
271 for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
272 if (code == i386_howto_table[i].type)
273 return &i386_howto_table[i];
277 static reloc_howto_type *
278 bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
279 const char *name ATTRIBUTE_UNUSED)
285 bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread,
286 void *vfile, char *buf)
288 FILE *file = (FILE *)vfile;
290 switch (thread->flavour)
292 case BFD_MACH_O_x86_THREAD_STATE:
293 if (thread->size < (8 + 16 * 4))
295 fprintf (file, " x86_THREAD_STATE:\n");
296 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
297 (unsigned long)bfd_get_32 (abfd, buf + 0),
298 (unsigned long)bfd_get_32 (abfd, buf + 4));
299 fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
300 (unsigned long)bfd_get_32 (abfd, buf + 8),
301 (unsigned long)bfd_get_32 (abfd, buf + 12),
302 (unsigned long)bfd_get_32 (abfd, buf + 16),
303 (unsigned long)bfd_get_32 (abfd, buf + 20));
304 fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n",
305 (unsigned long)bfd_get_32 (abfd, buf + 24),
306 (unsigned long)bfd_get_32 (abfd, buf + 28),
307 (unsigned long)bfd_get_32 (abfd, buf + 32),
308 (unsigned long)bfd_get_32 (abfd, buf + 36));
309 fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n",
310 (unsigned long)bfd_get_32 (abfd, buf + 40),
311 (unsigned long)bfd_get_32 (abfd, buf + 44),
312 (unsigned long)bfd_get_32 (abfd, buf + 48),
313 (unsigned long)bfd_get_32 (abfd, buf + 52));
314 fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n",
315 (unsigned long)bfd_get_32 (abfd, buf + 56),
316 (unsigned long)bfd_get_32 (abfd, buf + 60),
317 (unsigned long)bfd_get_32 (abfd, buf + 64),
318 (unsigned long)bfd_get_32 (abfd, buf + 68));
320 case BFD_MACH_O_x86_FLOAT_STATE:
321 if (thread->size < 8)
323 fprintf (file, " x86_FLOAT_STATE:\n");
324 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
325 (unsigned long)bfd_get_32 (abfd, buf + 0),
326 (unsigned long)bfd_get_32 (abfd, buf + 4));
328 case BFD_MACH_O_x86_EXCEPTION_STATE:
329 if (thread->size < 8 + 3 * 4)
331 fprintf (file, " x86_EXCEPTION_STATE:\n");
332 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
333 (unsigned long)bfd_get_32 (abfd, buf + 0),
334 (unsigned long)bfd_get_32 (abfd, buf + 4));
335 fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n",
336 (unsigned long)bfd_get_32 (abfd, buf + 8),
337 (unsigned long)bfd_get_32 (abfd, buf + 12),
338 (unsigned long)bfd_get_32 (abfd, buf + 16));
346 static const mach_o_section_name_xlat text_section_names_xlat[] =
348 { ".symbol_stub", "__symbol_stub",
349 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
350 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
352 { ".picsymbol_stub", "__picsymbol_stub",
353 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
354 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
356 { NULL, NULL, 0, 0, 0, 0}
359 static const mach_o_section_name_xlat data_section_names_xlat[] =
361 /* The first two are recognized by i386, but not emitted for x86 by
363 { ".non_lazy_symbol_pointer", "__nl_symbol_ptr",
364 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
365 BFD_MACH_O_S_ATTR_NONE, 2},
366 { ".lazy_symbol_pointer", "__la_symbol_ptr",
367 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
368 BFD_MACH_O_S_ATTR_NONE, 2},
369 { ".lazy_symbol_pointer2", "__la_sym_ptr2",
370 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
371 BFD_MACH_O_S_ATTR_NONE, 2},
372 { ".lazy_symbol_pointer3", "__la_sym_ptr3",
373 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
374 BFD_MACH_O_S_ATTR_NONE, 2},
375 { NULL, NULL, 0, 0, 0, 0}
378 static const mach_o_section_name_xlat import_section_names_xlat[] =
380 { ".picsymbol_stub3", "__jump_table",
381 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
382 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
383 | BFD_MACH_O_S_SELF_MODIFYING_CODE,
385 { ".non_lazy_symbol_pointer_x86", "__pointers",
386 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
387 BFD_MACH_O_S_ATTR_NONE, 2},
388 { NULL, NULL, 0, 0, 0, 0}
391 const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
393 { "__TEXT", text_section_names_xlat },
394 { "__DATA", data_section_names_xlat },
395 { "__IMPORT", import_section_names_xlat },
399 #define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_i386_canonicalize_one_reloc
400 #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
401 #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
403 #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
404 #define bfd_mach_o_section_type_valid_for_tgt NULL
406 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
407 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
409 #define TARGET_NAME i386_mach_o_vec
410 #define TARGET_STRING "mach-o-i386"
411 #define TARGET_ARCHITECTURE bfd_arch_i386
412 #define TARGET_PAGESIZE 4096
413 #define TARGET_BIG_ENDIAN 0
414 #define TARGET_ARCHIVE 0
415 #define TARGET_PRIORITY 0
416 #include "mach-o-target.c"