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S/390: Move start of 64 bit binaries from 2GB to 256MB.
[binutils-gdb.git] / bfd / mach-o-i386.c
blob55f0c04bc3f05a415592834ea6839bf844f22666
1 /* Intel i386 Mach-O support for BFD.
2 Copyright (C) 2009-2016 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/reloc.h"
27
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
31
32 static const bfd_target *
33 bfd_mach_o_i386_object_p (bfd *abfd)
34 {
35 return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_I386);
36 }
37
38 static const bfd_target *
39 bfd_mach_o_i386_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_I386);
43 }
44
45 static bfd_boolean
46 bfd_mach_o_i386_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;
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;
59
60 return TRUE;
61 }
62
63 static reloc_howto_type i386_howto_table[]=
64 {
65 /* 0 */
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 /* 4 */
83 HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
84 complain_overflow_bitfield,
85 NULL, "DISP16",
86 FALSE, 0xffff, 0xffff, TRUE),
87 HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
88 complain_overflow_bitfield,
89 NULL, "SECTDIFF_32",
90 FALSE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
92 complain_overflow_bitfield,
93 NULL, "LSECTDIFF_32",
94 FALSE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
96 complain_overflow_bitfield,
97 NULL, "PAIR_32",
98 FALSE, 0xffffffff, 0xffffffff, FALSE),
99 /* 8 */
100 HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
101 complain_overflow_bitfield,
102 NULL, "SECTDIFF_16",
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,
110 NULL, "PAIR_16",
111 FALSE, 0xffff, 0xffff, FALSE),
112 };
113
114 static bfd_boolean
115 bfd_mach_o_i386_canonicalize_one_reloc (bfd *abfd,
116 struct mach_o_reloc_info_external *raw,
117 arelent *res, asymbol **syms)
118 {
119 bfd_mach_o_reloc_info reloc;
120
121 if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
122 return FALSE;
123
124 if (reloc.r_scattered)
125 {
126 switch (reloc.r_type)
127 {
128 case BFD_MACH_O_GENERIC_RELOC_PAIR:
129 if (reloc.r_length == 2)
130 {
131 res->howto = &i386_howto_table[7];
132 res->address = res[-1].address;
133 return TRUE;
134 }
135 else if (reloc.r_length == 1)
136 {
137 res->howto = &i386_howto_table[10];
138 res->address = res[-1].address;
139 return TRUE;
140 }
141 return FALSE;
142 case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
143 if (reloc.r_length == 2)
144 {
145 res->howto = &i386_howto_table[5];
146 return TRUE;
147 }
148 else if (reloc.r_length == 1)
149 {
150 res->howto = &i386_howto_table[8];
151 return TRUE;
152 }
153 return FALSE;
154 case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
155 if (reloc.r_length == 2)
156 {
157 res->howto = &i386_howto_table[6];
158 return TRUE;
159 }
160 else if (reloc.r_length == 1)
161 {
162 res->howto = &i386_howto_table[9];
163 return TRUE;
164 }
165 return FALSE;
166 default:
167 return FALSE;
168 }
169 }
170 else
171 {
172 switch (reloc.r_type)
173 {
174 case BFD_MACH_O_GENERIC_RELOC_VANILLA:
175 switch ((reloc.r_length << 1) | reloc.r_pcrel)
176 {
177 case 0: /* len = 0, pcrel = 0 */
178 res->howto = &i386_howto_table[2];
179 return TRUE;
180 case 2: /* len = 1, pcrel = 0 */
181 res->howto = &i386_howto_table[1];
182 return TRUE;
183 case 3: /* len = 1, pcrel = 1 */
184 res->howto = &i386_howto_table[4];
185 return TRUE;
186 case 4: /* len = 2, pcrel = 0 */
187 res->howto = &i386_howto_table[0];
188 return TRUE;
189 case 5: /* len = 2, pcrel = 1 */
190 res->howto = &i386_howto_table[3];
191 return TRUE;
192 default:
193 return FALSE;
194 }
195 break;
196 default:
197 return FALSE;
198 }
199 }
200 }
201
202 static bfd_boolean
203 bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
204 {
205 rinfo->r_address = rel->address;
206 switch (rel->howto->type)
207 {
208 case BFD_RELOC_32:
209 case BFD_RELOC_32_PCREL:
210 case BFD_RELOC_16:
211 case BFD_RELOC_16_PCREL:
212 case BFD_RELOC_8:
213 rinfo->r_scattered = 0;
214 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
215 rinfo->r_pcrel = rel->howto->pc_relative;
216 rinfo->r_length = rel->howto->size; /* Correct in practice. */
217 if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
218 {
219 rinfo->r_extern = 0;
220 rinfo->r_value =
221 (*rel->sym_ptr_ptr)->section->output_section->target_index;
222 }
223 else
224 {
225 rinfo->r_extern = 1;
226 rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
227 }
228 break;
229 case BFD_RELOC_MACH_O_SECTDIFF:
230 rinfo->r_scattered = 1;
231 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
232 rinfo->r_pcrel = 0;
233 rinfo->r_length = rel->howto->size;
234 rinfo->r_extern = 0;
235 rinfo->r_value = rel->addend;
236 break;
237 case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
238 rinfo->r_scattered = 1;
239 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
240 rinfo->r_pcrel = 0;
241 rinfo->r_length = rel->howto->size;
242 rinfo->r_extern = 0;
243 rinfo->r_value = rel->addend;
244 break;
245 case BFD_RELOC_MACH_O_PAIR:
246 rinfo->r_address = 0;
247 rinfo->r_scattered = 1;
248 rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
249 rinfo->r_pcrel = 0;
250 rinfo->r_length = rel->howto->size;
251 rinfo->r_extern = 0;
252 rinfo->r_value = rel->addend;
253 break;
254 default:
255 return FALSE;
256 }
257 return TRUE;
258 }
259
260 static reloc_howto_type *
261 bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
262 bfd_reloc_code_real_type code)
263 {
264 unsigned int i;
265
266 for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
267 if (code == i386_howto_table[i].type)
268 return &i386_howto_table[i];
269 return NULL;
270 }
271
272 static reloc_howto_type *
273 bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
274 const char *name ATTRIBUTE_UNUSED)
275 {
276 return NULL;
277 }
278
279 static bfd_boolean
280 bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread,
281 void *vfile, char *buf)
282 {
283 FILE *file = (FILE *)vfile;
284
285 switch (thread->flavour)
286 {
287 case BFD_MACH_O_x86_THREAD_STATE:
288 if (thread->size < (8 + 16 * 4))
289 return FALSE;
290 fprintf (file, " x86_THREAD_STATE:\n");
291 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
292 (unsigned long)bfd_get_32 (abfd, buf + 0),
293 (unsigned long)bfd_get_32 (abfd, buf + 4));
294 fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
295 (unsigned long)bfd_get_32 (abfd, buf + 8),
296 (unsigned long)bfd_get_32 (abfd, buf + 12),
297 (unsigned long)bfd_get_32 (abfd, buf + 16),
298 (unsigned long)bfd_get_32 (abfd, buf + 20));
299 fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n",
300 (unsigned long)bfd_get_32 (abfd, buf + 24),
301 (unsigned long)bfd_get_32 (abfd, buf + 28),
302 (unsigned long)bfd_get_32 (abfd, buf + 32),
303 (unsigned long)bfd_get_32 (abfd, buf + 36));
304 fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n",
305 (unsigned long)bfd_get_32 (abfd, buf + 40),
306 (unsigned long)bfd_get_32 (abfd, buf + 44),
307 (unsigned long)bfd_get_32 (abfd, buf + 48),
308 (unsigned long)bfd_get_32 (abfd, buf + 52));
309 fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n",
310 (unsigned long)bfd_get_32 (abfd, buf + 56),
311 (unsigned long)bfd_get_32 (abfd, buf + 60),
312 (unsigned long)bfd_get_32 (abfd, buf + 64),
313 (unsigned long)bfd_get_32 (abfd, buf + 68));
314 return TRUE;
315 case BFD_MACH_O_x86_FLOAT_STATE:
316 if (thread->size < 8)
317 return FALSE;
318 fprintf (file, " x86_FLOAT_STATE:\n");
319 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
320 (unsigned long)bfd_get_32 (abfd, buf + 0),
321 (unsigned long)bfd_get_32 (abfd, buf + 4));
322 return TRUE;
323 case BFD_MACH_O_x86_EXCEPTION_STATE:
324 if (thread->size < 8 + 3 * 4)
325 return FALSE;
326 fprintf (file, " x86_EXCEPTION_STATE:\n");
327 fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
328 (unsigned long)bfd_get_32 (abfd, buf + 0),
329 (unsigned long)bfd_get_32 (abfd, buf + 4));
330 fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n",
331 (unsigned long)bfd_get_32 (abfd, buf + 8),
332 (unsigned long)bfd_get_32 (abfd, buf + 12),
333 (unsigned long)bfd_get_32 (abfd, buf + 16));
334 return TRUE;
335 default:
336 break;
337 }
338 return FALSE;
339 }
340
341 static const mach_o_section_name_xlat text_section_names_xlat[] =
342 {
343 { ".symbol_stub", "__symbol_stub",
344 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
345 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
346 0},
347 { ".picsymbol_stub", "__picsymbol_stub",
348 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
349 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
350 0},
351 { NULL, NULL, 0, 0, 0, 0}
352 };
353
354 static const mach_o_section_name_xlat data_section_names_xlat[] =
355 {
356 /* The first two are recognized by i386, but not emitted for x86 by
357 modern GCC. */
358 { ".non_lazy_symbol_pointer", "__nl_symbol_ptr",
359 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
360 BFD_MACH_O_S_ATTR_NONE, 2},
361 { ".lazy_symbol_pointer", "__la_symbol_ptr",
362 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
363 BFD_MACH_O_S_ATTR_NONE, 2},
364 { ".lazy_symbol_pointer2", "__la_sym_ptr2",
365 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
366 BFD_MACH_O_S_ATTR_NONE, 2},
367 { ".lazy_symbol_pointer3", "__la_sym_ptr3",
368 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
369 BFD_MACH_O_S_ATTR_NONE, 2},
370 { NULL, NULL, 0, 0, 0, 0}
371 };
372
373 static const mach_o_section_name_xlat import_section_names_xlat[] =
374 {
375 { ".picsymbol_stub3", "__jump_table",
376 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
377 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
378 | BFD_MACH_O_S_SELF_MODIFYING_CODE,
379 6},
380 { ".non_lazy_symbol_pointer_x86", "__pointers",
381 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
382 BFD_MACH_O_S_ATTR_NONE, 2},
383 { NULL, NULL, 0, 0, 0, 0}
384 };
385
386 const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
387 {
388 { "__TEXT", text_section_names_xlat },
389 { "__DATA", data_section_names_xlat },
390 { "__IMPORT", import_section_names_xlat },
391 { NULL, NULL }
392 };
393
394 #define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_i386_canonicalize_one_reloc
395 #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
396 #define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
397
398 #define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
399 #define bfd_mach_o_section_type_valid_for_tgt NULL
400
401 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
402 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
403
404 #define TARGET_NAME i386_mach_o_vec
405 #define TARGET_STRING "mach-o-i386"
406 #define TARGET_ARCHITECTURE bfd_arch_i386
407 #define TARGET_PAGESIZE 4096
408 #define TARGET_BIG_ENDIAN 0
409 #define TARGET_ARCHIVE 0
410 #define TARGET_PRIORITY 0
411 #include "mach-o-target.c"
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