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* elf32-spu.c (build_stub): Fix malloc under-allocation.
[binutils.git] / bfd / mach-o-i386.c
blobe7688abfc78a074139127ae1518688ebfdee4713
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 /* 0 */
67 HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
68 complain_overflow_bitfield,
69 NULL, "32",
70 FALSE, 0xffffffff, 0xffffffff, FALSE),
71 HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0,
72 complain_overflow_bitfield,
73 NULL, "16",
74 FALSE, 0xffff, 0xffff, FALSE),
75 HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0,
76 complain_overflow_bitfield,
77 NULL, "8",
78 FALSE, 0xff, 0xff, FALSE),
79 HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
80 complain_overflow_bitfield,
81 NULL, "DISP32",
82 FALSE, 0xffffffff, 0xffffffff, TRUE),
83 /* 4 */
84 HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
85 complain_overflow_bitfield,
86 NULL, "DISP16",
87 FALSE, 0xffff, 0xffff, TRUE),
88 HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
89 complain_overflow_bitfield,
90 NULL, "SECTDIFF_32",
91 FALSE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
93 complain_overflow_bitfield,
94 NULL, "LSECTDIFF_32",
95 FALSE, 0xffffffff, 0xffffffff, FALSE),
96 HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
97 complain_overflow_bitfield,
98 NULL, "PAIR_32",
99 FALSE, 0xffffffff, 0xffffffff, FALSE),
100 /* 8 */
101 HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
102 complain_overflow_bitfield,
103 NULL, "SECTDIFF_16",
104 FALSE, 0xffff, 0xffff, FALSE),
105 HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0,
106 complain_overflow_bitfield,
107 NULL, "LSECTDIFF_16",
108 FALSE, 0xffff, 0xffff, FALSE),
109 HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0,
110 complain_overflow_bitfield,
111 NULL, "PAIR_16",
112 FALSE, 0xffff, 0xffff, FALSE),
113 };
114
115 static bfd_boolean
116 bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc)
117 {
118 if (reloc->r_scattered)
119 {
120 switch (reloc->r_type)
121 {
122 case BFD_MACH_O_GENERIC_RELOC_PAIR:
123 if (reloc->r_length == 2)
124 {
125 res->howto = &i386_howto_table[7];
126 res->address = res[-1].address;
127 return TRUE;
128 }
129 else if (reloc->r_length == 1)
130 {
131 res->howto = &i386_howto_table[10];
132 res->address = res[-1].address;
133 return TRUE;
134 }
135 return FALSE;
136 case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
137 if (reloc->r_length == 2)
138 {
139 res->howto = &i386_howto_table[5];
140 return TRUE;
141 }
142 else if (reloc->r_length == 1)
143 {
144 res->howto = &i386_howto_table[8];
145 return TRUE;
146 }
147 return FALSE;
148 case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
149 if (reloc->r_length == 2)
150 {
151 res->howto = &i386_howto_table[6];
152 return TRUE;
153 }
154 else if (reloc->r_length == 1)
155 {
156 res->howto = &i386_howto_table[9];
157 return TRUE;
158 }
159 return FALSE;
160 default:
161 return FALSE;
162 }
163 }
164 else
165 {
166 switch (reloc->r_type)
167 {
168 case BFD_MACH_O_GENERIC_RELOC_VANILLA:
169 switch ((reloc->r_length << 1) | reloc->r_pcrel)
170 {
171 case 0: /* len = 0, pcrel = 0 */
172 res->howto = &i386_howto_table[2];
173 return TRUE;
174 case 2: /* len = 1, pcrel = 0 */
175 res->howto = &i386_howto_table[1];
176 return TRUE;
177 case 3: /* len = 1, pcrel = 1 */
178 res->howto = &i386_howto_table[4];
179 return TRUE;
180 case 4: /* len = 2, pcrel = 0 */
181 res->howto = &i386_howto_table[0];
182 return TRUE;
183 case 5: /* len = 2, pcrel = 1 */
184 res->howto = &i386_howto_table[3];
185 return TRUE;
186 default:
187 return FALSE;
188 }
189 break;
190 default:
191 return FALSE;
192 }
193 }
194 }
195
196 static bfd_boolean
197 bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
198 {
199 rinfo->r_address = rel->address;
200 switch (rel->howto->type)
201 {
202 case BFD_RELOC_32:
203 case BFD_RELOC_32_PCREL:
204 case BFD_RELOC_16:
205 case BFD_RELOC_16_PCREL:
206 case BFD_RELOC_8:
207 rinfo->r_scattered = 0;
208 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
209 rinfo->r_pcrel = rel->howto->pc_relative;
210 rinfo->r_length = rel->howto->size; /* Correct in practice. */
211 if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
212 {
213 rinfo->r_extern = 0;
214 rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index;
215 }
216 else
217 {
218 rinfo->r_extern = 1;
219 rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
220 }
221 break;
222 case BFD_RELOC_MACH_O_SECTDIFF:
223 rinfo->r_scattered = 1;
224 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
225 rinfo->r_pcrel = 0;
226 rinfo->r_length = rel->howto->size;
227 rinfo->r_extern = 0;
228 rinfo->r_value = rel->addend;
229 break;
230 case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
231 rinfo->r_scattered = 1;
232 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
233 rinfo->r_pcrel = 0;
234 rinfo->r_length = rel->howto->size;
235 rinfo->r_extern = 0;
236 rinfo->r_value = rel->addend;
237 break;
238 case BFD_RELOC_MACH_O_PAIR:
239 rinfo->r_address = 0;
240 rinfo->r_scattered = 1;
241 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
242 rinfo->r_pcrel = 0;
243 rinfo->r_length = rel->howto->size;
244 rinfo->r_extern = 0;
245 rinfo->r_value = rel->addend;
246 break;
247 default:
248 return FALSE;
249 }
250 return TRUE;
251 }
252
253 static reloc_howto_type *
254 bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
255 bfd_reloc_code_real_type code)
256 {
257 unsigned int i;
258
259 for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
260 if (code == i386_howto_table[i].type)
261 return &i386_howto_table[i];
262 return NULL;
263 }
264
265 static reloc_howto_type *
266 bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
267 const char *name ATTRIBUTE_UNUSED)
268 {
269 return NULL;
270 }
271
272 static bfd_boolean
273 bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread,
274 void *vfile, char *buf)
275 {
276 FILE *file = (FILE *)vfile;
277
278 switch (thread->flavour)
279 {
280 case BFD_MACH_O_x86_THREAD_STATE:
281 if (thread->size < (8 + 16 * 4))
282 return FALSE;
283 fprintf (file, " x86_THREAD_STATE:\n");
284 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
285 (unsigned long)bfd_get_32 (abfd, buf + 0),
286 (unsigned long)bfd_get_32 (abfd, buf + 4));
287 fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
288 (unsigned long)bfd_get_32 (abfd, buf + 8),
289 (unsigned long)bfd_get_32 (abfd, buf + 12),
290 (unsigned long)bfd_get_32 (abfd, buf + 16),
291 (unsigned long)bfd_get_32 (abfd, buf + 20));
292 fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n",
293 (unsigned long)bfd_get_32 (abfd, buf + 24),
294 (unsigned long)bfd_get_32 (abfd, buf + 28),
295 (unsigned long)bfd_get_32 (abfd, buf + 32),
296 (unsigned long)bfd_get_32 (abfd, buf + 36));
297 fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n",
298 (unsigned long)bfd_get_32 (abfd, buf + 40),
299 (unsigned long)bfd_get_32 (abfd, buf + 44),
300 (unsigned long)bfd_get_32 (abfd, buf + 48),
301 (unsigned long)bfd_get_32 (abfd, buf + 52));
302 fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n",
303 (unsigned long)bfd_get_32 (abfd, buf + 56),
304 (unsigned long)bfd_get_32 (abfd, buf + 60),
305 (unsigned long)bfd_get_32 (abfd, buf + 64),
306 (unsigned long)bfd_get_32 (abfd, buf + 68));
307 return TRUE;
308 case BFD_MACH_O_x86_FLOAT_STATE:
309 if (thread->size < 8)
310 return FALSE;
311 fprintf (file, " x86_FLOAT_STATE:\n");
312 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
313 (unsigned long)bfd_get_32 (abfd, buf + 0),
314 (unsigned long)bfd_get_32 (abfd, buf + 4));
315 return TRUE;
316 case BFD_MACH_O_x86_EXCEPTION_STATE:
317 if (thread->size < 8 + 3 * 4)
318 return FALSE;
319 fprintf (file, " x86_EXCEPTION_STATE:\n");
320 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
321 (unsigned long)bfd_get_32 (abfd, buf + 0),
322 (unsigned long)bfd_get_32 (abfd, buf + 4));
323 fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n",
324 (unsigned long)bfd_get_32 (abfd, buf + 8),
325 (unsigned long)bfd_get_32 (abfd, buf + 12),
326 (unsigned long)bfd_get_32 (abfd, buf + 16));
327 return TRUE;
328 default:
329 break;
330 }
331 return FALSE;
332 }
333
334 static const mach_o_section_name_xlat text_section_names_xlat[] =
335 {
336 { ".symbol_stub", "__symbol_stub",
337 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
338 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
339 0},
340 { ".picsymbol_stub", "__picsymbol_stub",
341 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
342 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
343 0},
344 { NULL, NULL, 0, 0, 0, 0}
345 };
346
347 static const mach_o_section_name_xlat data_section_names_xlat[] =
348 {
349 /* The first two are recognized by i386, but not emitted for x86 by
350 modern GCC. */
351 { ".non_lazy_symbol_pointer", "__nl_symbol_ptr",
352 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
353 BFD_MACH_O_S_ATTR_NONE, 2},
354 { ".lazy_symbol_pointer", "__la_symbol_ptr",
355 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
356 BFD_MACH_O_S_ATTR_NONE, 2},
357 { ".lazy_symbol_pointer2", "__la_sym_ptr2",
358 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
359 BFD_MACH_O_S_ATTR_NONE, 2},
360 { ".lazy_symbol_pointer3", "__la_sym_ptr3",
361 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
362 BFD_MACH_O_S_ATTR_NONE, 2},
363 { NULL, NULL, 0, 0, 0, 0}
364 };
365
366 static const mach_o_section_name_xlat import_section_names_xlat[] =
367 {
368 { ".picsymbol_stub3", "__jump_table",
369 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
370 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
371 | BFD_MACH_O_S_SELF_MODIFYING_CODE,
372 6},
373 { ".non_lazy_symbol_pointer_x86", "__pointers",
374 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
375 BFD_MACH_O_S_ATTR_NONE, 2},
376 { NULL, NULL, 0, 0, 0, 0}
377 };
378
379 const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
380 {
381 { "__TEXT", text_section_names_xlat },
382 { "__DATA", data_section_names_xlat },
383 { "__IMPORT", import_section_names_xlat },
384 { NULL, NULL }
385 };
386
387 #define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in
388 #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
389 #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
390
391 #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
392 #define bfd_mach_o_section_type_valid_for_tgt NULL
393
394 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
395 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
396
397 #define TARGET_NAME mach_o_i386_vec
398 #define TARGET_STRING "mach-o-i386"
399 #define TARGET_ARCHITECTURE bfd_arch_i386
400 #define TARGET_BIG_ENDIAN 0
401 #define TARGET_ARCHIVE 0
402 #define TARGET_PRIORITY 0
403 #include "mach-o-target.c"
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