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bfd:
[binutils.git] / bfd / mach-o-i386.c
blobd1067104132483db02a73b1e12350b8db4e430b6
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 static const mach_o_section_name_xlat text_section_names_xlat[] =
284 {
285 { ".symbol_stub", "__symbol_stub",
286 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
287 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
288 0},
289 { ".picsymbol_stub", "__picsymbol_stub",
290 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
291 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
292 0},
293 { NULL, NULL, 0, 0, 0, 0}
294 };
295
296 static const mach_o_section_name_xlat data_section_names_xlat[] =
297 {
298 /* The first two are recognized by i386, but not emitted for x86 by
299 modern GCC. */
300 { ".non_lazy_symbol_pointer", "__nl_symbol_ptr",
301 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
302 BFD_MACH_O_S_ATTR_NONE, 2},
303 { ".lazy_symbol_pointer", "__la_symbol_ptr",
304 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
305 BFD_MACH_O_S_ATTR_NONE, 2},
306 { ".lazy_symbol_pointer2", "__la_sym_ptr2",
307 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
308 BFD_MACH_O_S_ATTR_NONE, 2},
309 { ".lazy_symbol_pointer3", "__la_sym_ptr3",
310 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
311 BFD_MACH_O_S_ATTR_NONE, 2},
312 { NULL, NULL, 0, 0, 0, 0}
313 };
314
315 static const mach_o_section_name_xlat import_section_names_xlat[] =
316 {
317 { ".picsymbol_stub3", "__jump_table",
318 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
319 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
320 | BFD_MACH_O_S_SELF_MODIFYING_CODE,
321 6},
322 { ".non_lazy_symbol_pointer_x86", "__pointers",
323 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
324 BFD_MACH_O_S_ATTR_NONE, 2},
325 { NULL, NULL, 0, 0, 0, 0}
326 };
327
328 const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
329 {
330 { "__TEXT", text_section_names_xlat },
331 { "__DATA", data_section_names_xlat },
332 { "__IMPORT", import_section_names_xlat },
333 { NULL, NULL }
334 };
335
336 #define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in
337 #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
338 #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
339
340 #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
341 #define bfd_mach_o_section_type_valid_for_tgt NULL
342
343 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
344 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
345
346 #define TARGET_NAME mach_o_i386_vec
347 #define TARGET_STRING "mach-o-i386"
348 #define TARGET_ARCHITECTURE bfd_arch_i386
349 #define TARGET_BIG_ENDIAN 0
350 #define TARGET_ARCHIVE 0
351 #define TARGET_PRIORITY 0
352 #include "mach-o-target.c"
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