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[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2014 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 "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
39
40 unsigned int
41 bfd_mach_o_version (bfd *abfd)
42 {
43 bfd_mach_o_data_struct *mdata = NULL;
44
45 BFD_ASSERT (bfd_mach_o_valid (abfd));
46 mdata = bfd_mach_o_get_data (abfd);
47
48 return mdata->header.version;
49 }
50
51 bfd_boolean
52 bfd_mach_o_valid (bfd *abfd)
53 {
54 if (abfd == NULL || abfd->xvec == NULL)
55 return FALSE;
56
57 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
58 return FALSE;
59
60 if (bfd_mach_o_get_data (abfd) == NULL)
61 return FALSE;
62 return TRUE;
63 }
64
65 static INLINE bfd_boolean
66 mach_o_wide_p (bfd_mach_o_header *header)
67 {
68 switch (header->version)
69 {
70 case 1:
71 return FALSE;
72 case 2:
73 return TRUE;
74 default:
75 BFD_FAIL ();
76 return FALSE;
77 }
78 }
79
80 static INLINE bfd_boolean
81 bfd_mach_o_wide_p (bfd *abfd)
82 {
83 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
84 }
85
86 /* Tables to translate well known Mach-O segment/section names to bfd
87 names. Use of canonical names (such as .text or .debug_frame) is required
88 by gdb. */
89
90 /* __TEXT Segment. */
91 static const mach_o_section_name_xlat text_section_names_xlat[] =
92 {
93 { ".text", "__text",
94 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
95 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
96 { ".const", "__const",
97 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_NONE, 0},
99 { ".static_const", "__static_const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".cstring", "__cstring",
103 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
104 BFD_MACH_O_S_CSTRING_LITERALS,
105 BFD_MACH_O_S_ATTR_NONE, 0},
106 { ".literal4", "__literal4",
107 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 2},
109 { ".literal8", "__literal8",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 3},
112 { ".literal16", "__literal16",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 4},
115 { ".constructor", "__constructor",
116 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
117 BFD_MACH_O_S_ATTR_NONE, 0},
118 { ".destructor", "__destructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".eh_frame", "__eh_frame",
122 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
123 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
124 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
125 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
126 { NULL, NULL, 0, 0, 0, 0}
127 };
128
129 /* __DATA Segment. */
130 static const mach_o_section_name_xlat data_section_names_xlat[] =
131 {
132 { ".data", "__data",
133 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
134 BFD_MACH_O_S_ATTR_NONE, 0},
135 { ".bss", "__bss",
136 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".const_data", "__const",
139 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".static_data", "__static_data",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".mod_init_func", "__mod_init_func",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
146 BFD_MACH_O_S_ATTR_NONE, 2},
147 { ".mod_term_func", "__mod_term_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".dyld", "__dyld",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
152 BFD_MACH_O_S_ATTR_NONE, 0},
153 { ".cfstring", "__cfstring",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 2},
156 { NULL, NULL, 0, 0, 0, 0}
157 };
158
159 /* __DWARF Segment. */
160 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
161 {
162 { ".debug_frame", "__debug_frame",
163 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
164 BFD_MACH_O_S_ATTR_DEBUG, 0},
165 { ".debug_info", "__debug_info",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_abbrev", "__debug_abbrev",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_aranges", "__debug_aranges",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_macinfo", "__debug_macinfo",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_line", "__debug_line",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_loc", "__debug_loc",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_pubnames", "__debug_pubnames",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubtypes", "__debug_pubtypes",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_str", "__debug_str",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_ranges", "__debug_ranges",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_macro", "__debug_macro",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_gdb_scripts", "__debug_gdb_scri",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { NULL, NULL, 0, 0, 0, 0}
202 };
203
204 /* __OBJC Segment. */
205 static const mach_o_section_name_xlat objc_section_names_xlat[] =
206 {
207 { ".objc_class", "__class",
208 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
209 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
210 { ".objc_meta_class", "__meta_class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_cat_cls_meth", "__cat_cls_meth",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_inst_meth", "__cat_inst_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_protocol", "__protocol",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_string_object", "__string_object",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_cls_meth", "__cls_meth",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_inst_meth", "__inst_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_cls_refs", "__cls_refs",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_message_refs", "__message_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_symbols", "__symbols",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_category", "__category",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_class_vars", "__class_vars",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_instance_vars", "__instance_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_module_info", "__module_info",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_selector_strs", "__selector_strs",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_image_info", "__image_info",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_selector_fixup", "__sel_fixup",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 /* Objc V1 */
262 { ".objc1_class_ext", "__class_ext",
263 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
264 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
265 { ".objc1_property_list", "__property",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_protocol_ext", "__protocol_ext",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { NULL, NULL, 0, 0, 0, 0}
272 };
273
274 static const mach_o_segment_name_xlat segsec_names_xlat[] =
275 {
276 { "__TEXT", text_section_names_xlat },
277 { "__DATA", data_section_names_xlat },
278 { "__DWARF", dwarf_section_names_xlat },
279 { "__OBJC", objc_section_names_xlat },
280 { NULL, NULL }
281 };
282
283 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
284
285 /* For both cases bfd-name => mach-o name and vice versa, the specific target
286 is checked before the generic. This allows a target (e.g. ppc for cstring)
287 to override the generic definition with a more specific one. */
288
289 /* Fetch the translation from a Mach-O section designation (segment, section)
290 as a bfd short name, if one exists. Otherwise return NULL.
291
292 Allow the segment and section names to be unterminated 16 byte arrays. */
293
294 const mach_o_section_name_xlat *
295 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
296 const char *sectname)
297 {
298 const struct mach_o_segment_name_xlat *seg;
299 const mach_o_section_name_xlat *sec;
300 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
301
302 /* First try any target-specific translations defined... */
303 if (bed->segsec_names_xlat)
304 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
305 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
306 for (sec = seg->sections; sec->mach_o_name; sec++)
307 if (strncmp (sec->mach_o_name, sectname,
308 BFD_MACH_O_SECTNAME_SIZE) == 0)
309 return sec;
310
311 /* ... and then the Mach-O generic ones. */
312 for (seg = segsec_names_xlat; seg->segname; seg++)
313 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
314 for (sec = seg->sections; sec->mach_o_name; sec++)
315 if (strncmp (sec->mach_o_name, sectname,
316 BFD_MACH_O_SECTNAME_SIZE) == 0)
317 return sec;
318
319 return NULL;
320 }
321
322 /* If the bfd_name for this section is a 'canonical' form for which we
323 know the Mach-O data, return the segment name and the data for the
324 Mach-O equivalent. Otherwise return NULL. */
325
326 const mach_o_section_name_xlat *
327 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
328 const char **segname)
329 {
330 const struct mach_o_segment_name_xlat *seg;
331 const mach_o_section_name_xlat *sec;
332 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
333 *segname = NULL;
334
335 if (bfd_name[0] != '.')
336 return NULL;
337
338 /* First try any target-specific translations defined... */
339 if (bed->segsec_names_xlat)
340 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
341 for (sec = seg->sections; sec->bfd_name; sec++)
342 if (strcmp (bfd_name, sec->bfd_name) == 0)
343 {
344 *segname = seg->segname;
345 return sec;
346 }
347
348 /* ... and then the Mach-O generic ones. */
349 for (seg = segsec_names_xlat; seg->segname; seg++)
350 for (sec = seg->sections; sec->bfd_name; sec++)
351 if (strcmp (bfd_name, sec->bfd_name) == 0)
352 {
353 *segname = seg->segname;
354 return sec;
355 }
356
357 return NULL;
358 }
359
360 /* Convert Mach-O section name to BFD.
361
362 Try to use standard/canonical names, for which we have tables including
363 default flag settings - which are returned. Otherwise forge a new name
364 in the form "<segmentname>.<sectionname>" this will be prefixed with
365 LC_SEGMENT. if the segment name does not begin with an underscore.
366
367 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
368 terminated if the name length is exactly 16 bytes - but must be if the name
369 length is less than 16 characters). */
370
371 void
372 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
373 const char *secname, const char **name,
374 flagword *flags)
375 {
376 const mach_o_section_name_xlat *xlat;
377 char *res;
378 unsigned int len;
379 const char *pfx = "";
380
381 *name = NULL;
382 *flags = SEC_NO_FLAGS;
383
384 /* First search for a canonical name...
385 xlat will be non-null if there is an entry for segname, secname. */
386 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
387 if (xlat)
388 {
389 len = strlen (xlat->bfd_name);
390 res = bfd_alloc (abfd, len+1);
391 if (res == NULL)
392 return;
393 memcpy (res, xlat->bfd_name, len+1);
394 *name = res;
395 *flags = xlat->bfd_flags;
396 return;
397 }
398
399 /* ... else we make up a bfd name from the segment concatenated with the
400 section. */
401
402 len = 16 + 1 + 16 + 1;
403
404 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
405 with an underscore. */
406 if (segname[0] != '_')
407 {
408 static const char seg_pfx[] = "LC_SEGMENT.";
409
410 pfx = seg_pfx;
411 len += sizeof (seg_pfx) - 1;
412 }
413
414 res = bfd_alloc (abfd, len);
415 if (res == NULL)
416 return;
417 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
418 *name = res;
419 }
420
421 /* Convert a bfd section name to a Mach-O segment + section name.
422
423 If the name is a canonical one for which we have a Darwin match
424 return the translation table - which contains defaults for flags,
425 type, attribute and default alignment data.
426
427 Otherwise, expand the bfd_name (assumed to be in the form
428 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
429
430 static const mach_o_section_name_xlat *
431 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
432 asection *sect,
433 bfd_mach_o_section *section)
434 {
435 const mach_o_section_name_xlat *xlat;
436 const char *name = bfd_get_section_name (abfd, sect);
437 const char *segname;
438 const char *dot;
439 unsigned int len;
440 unsigned int seglen;
441 unsigned int seclen;
442
443 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
444 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
445
446 /* See if is a canonical name ... */
447 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
448 if (xlat)
449 {
450 strcpy (section->segname, segname);
451 strcpy (section->sectname, xlat->mach_o_name);
452 return xlat;
453 }
454
455 /* .. else we convert our constructed one back to Mach-O.
456 Strip LC_SEGMENT. prefix, if present. */
457 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
458 name += 11;
459
460 /* Find a dot. */
461 dot = strchr (name, '.');
462 len = strlen (name);
463
464 /* Try to split name into segment and section names. */
465 if (dot && dot != name)
466 {
467 seglen = dot - name;
468 seclen = len - (dot + 1 - name);
469
470 if (seglen < 16 && seclen < 16)
471 {
472 memcpy (section->segname, name, seglen);
473 section->segname[seglen] = 0;
474 memcpy (section->sectname, dot + 1, seclen);
475 section->sectname[seclen] = 0;
476 return NULL;
477 }
478 }
479
480 /* The segment and section names are both missing - don't make them
481 into dots. */
482 if (dot && dot == name)
483 return NULL;
484
485 /* Just duplicate the name into both segment and section. */
486 if (len > 16)
487 len = 16;
488 memcpy (section->segname, name, len);
489 section->segname[len] = 0;
490 memcpy (section->sectname, name, len);
491 section->sectname[len] = 0;
492 return NULL;
493 }
494
495 /* Return the size of an entry for section SEC.
496 Must be called only for symbol pointer section and symbol stubs
497 sections. */
498
499 unsigned int
500 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
501 {
502 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
503 {
504 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
505 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
506 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
507 case BFD_MACH_O_S_SYMBOL_STUBS:
508 return sec->reserved2;
509 default:
510 BFD_FAIL ();
511 return 0;
512 }
513 }
514
515 /* Return the number of indirect symbols for a section.
516 Must be called only for symbol pointer section and symbol stubs
517 sections. */
518
519 unsigned int
520 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
521 {
522 unsigned int elsz;
523
524 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
525 if (elsz == 0)
526 return 0;
527 else
528 return sec->size / elsz;
529 }
530
531
532 /* Copy any private info we understand from the input symbol
533 to the output symbol. */
534
535 bfd_boolean
536 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
537 asymbol *isymbol,
538 bfd *obfd ATTRIBUTE_UNUSED,
539 asymbol *osymbol)
540 {
541 bfd_mach_o_asymbol *os, *is;
542 os = (bfd_mach_o_asymbol *)osymbol;
543 is = (bfd_mach_o_asymbol *)isymbol;
544 os->n_type = is->n_type;
545 os->n_sect = is->n_sect;
546 os->n_desc = is->n_desc;
547 os->symbol.udata.i = is->symbol.udata.i;
548 return TRUE;
549 }
550
551 /* Copy any private info we understand from the input section
552 to the output section. */
553
554 bfd_boolean
555 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
556 asection *isection,
557 bfd *obfd ATTRIBUTE_UNUSED,
558 asection *osection)
559 {
560 if (osection->used_by_bfd == NULL)
561 osection->used_by_bfd = isection->used_by_bfd;
562 else
563 if (isection->used_by_bfd != NULL)
564 memcpy (osection->used_by_bfd, isection->used_by_bfd,
565 sizeof (bfd_mach_o_section));
566
567 if (osection->used_by_bfd != NULL)
568 ((bfd_mach_o_section *)osection->used_by_bfd)->bfdsection = osection;
569
570 return TRUE;
571 }
572
573 /* Copy any private info we understand from the input bfd
574 to the output bfd. */
575
576 bfd_boolean
577 bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
578 {
579 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
580 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
581 return TRUE;
582
583 BFD_ASSERT (bfd_mach_o_valid (ibfd));
584 BFD_ASSERT (bfd_mach_o_valid (obfd));
585
586 /* FIXME: copy commands. */
587
588 return TRUE;
589 }
590
591 /* This allows us to set up to 32 bits of flags (unless we invent some
592 fiendish scheme to subdivide). For now, we'll just set the file flags
593 without error checking - just overwrite. */
594
595 bfd_boolean
596 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
597 {
598 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
599
600 if (!mdata)
601 return FALSE;
602
603 mdata->header.flags = flags;
604 return TRUE;
605 }
606
607 /* Count the total number of symbols. */
608
609 static long
610 bfd_mach_o_count_symbols (bfd *abfd)
611 {
612 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
613
614 if (mdata->symtab == NULL)
615 return 0;
616 return mdata->symtab->nsyms;
617 }
618
619 long
620 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
621 {
622 long nsyms = bfd_mach_o_count_symbols (abfd);
623
624 return ((nsyms + 1) * sizeof (asymbol *));
625 }
626
627 long
628 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
629 {
630 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
631 long nsyms = bfd_mach_o_count_symbols (abfd);
632 bfd_mach_o_symtab_command *sym = mdata->symtab;
633 unsigned long j;
634
635 if (nsyms < 0)
636 return nsyms;
637
638 if (nsyms == 0)
639 {
640 /* Do not try to read symbols if there are none. */
641 alocation[0] = NULL;
642 return 0;
643 }
644
645 if (!bfd_mach_o_read_symtab_symbols (abfd))
646 {
647 (*_bfd_error_handler)
648 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
649 return 0;
650 }
651
652 BFD_ASSERT (sym->symbols != NULL);
653
654 for (j = 0; j < sym->nsyms; j++)
655 alocation[j] = &sym->symbols[j].symbol;
656
657 alocation[j] = NULL;
658
659 return nsyms;
660 }
661
662 /* Create synthetic symbols for indirect symbols. */
663
664 long
665 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
666 long symcount ATTRIBUTE_UNUSED,
667 asymbol **syms ATTRIBUTE_UNUSED,
668 long dynsymcount ATTRIBUTE_UNUSED,
669 asymbol **dynsyms ATTRIBUTE_UNUSED,
670 asymbol **ret)
671 {
672 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
673 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
674 bfd_mach_o_symtab_command *symtab = mdata->symtab;
675 asymbol *s;
676 unsigned long count, i, j, n;
677 size_t size;
678 char *names;
679 char *nul_name;
680
681 *ret = NULL;
682
683 /* Stop now if no symbols or no indirect symbols. */
684 if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
685 return 0;
686
687 if (dysymtab->nindirectsyms == 0)
688 return 0;
689
690 /* We need to allocate a bfd symbol for every indirect symbol and to
691 allocate the memory for its name. */
692 count = dysymtab->nindirectsyms;
693 size = count * sizeof (asymbol) + 1;
694
695 for (j = 0; j < count; j++)
696 {
697 unsigned int isym = dysymtab->indirect_syms[j];
698
699 /* Some indirect symbols are anonymous. */
700 if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
701 size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
702 }
703
704 s = *ret = (asymbol *) bfd_malloc (size);
705 if (s == NULL)
706 return -1;
707 names = (char *) (s + count);
708 nul_name = names;
709 *names++ = 0;
710
711 n = 0;
712 for (i = 0; i < mdata->nsects; i++)
713 {
714 bfd_mach_o_section *sec = mdata->sections[i];
715 unsigned int first, last;
716 bfd_vma addr;
717 bfd_vma entry_size;
718
719 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
720 {
721 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
722 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
723 case BFD_MACH_O_S_SYMBOL_STUBS:
724 /* Only these sections have indirect symbols. */
725 first = sec->reserved1;
726 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
727 addr = sec->addr;
728 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
729 for (j = first; j < last; j++)
730 {
731 unsigned int isym = dysymtab->indirect_syms[j];
732
733 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
734 s->section = sec->bfdsection;
735 s->value = addr - sec->addr;
736 s->udata.p = NULL;
737
738 if (isym < symtab->nsyms
739 && symtab->symbols[isym].symbol.name)
740 {
741 const char *sym = symtab->symbols[isym].symbol.name;
742 size_t len;
743
744 s->name = names;
745 len = strlen (sym);
746 memcpy (names, sym, len);
747 names += len;
748 memcpy (names, "$stub", sizeof ("$stub"));
749 names += sizeof ("$stub");
750 }
751 else
752 s->name = nul_name;
753
754 addr += entry_size;
755 s++;
756 n++;
757 }
758 break;
759 default:
760 break;
761 }
762 }
763
764 return n;
765 }
766
767 void
768 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
769 asymbol *symbol,
770 symbol_info *ret)
771 {
772 bfd_symbol_info (symbol, ret);
773 }
774
775 void
776 bfd_mach_o_print_symbol (bfd *abfd,
777 void * afile,
778 asymbol *symbol,
779 bfd_print_symbol_type how)
780 {
781 FILE *file = (FILE *) afile;
782 const char *name;
783 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
784
785 switch (how)
786 {
787 case bfd_print_symbol_name:
788 fprintf (file, "%s", symbol->name);
789 break;
790 default:
791 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
792 if (asym->n_type & BFD_MACH_O_N_STAB)
793 name = bfd_get_stab_name (asym->n_type);
794 else
795 switch (asym->n_type & BFD_MACH_O_N_TYPE)
796 {
797 case BFD_MACH_O_N_UNDF:
798 if (symbol->value == 0)
799 name = "UND";
800 else
801 name = "COM";
802 break;
803 case BFD_MACH_O_N_ABS:
804 name = "ABS";
805 break;
806 case BFD_MACH_O_N_INDR:
807 name = "INDR";
808 break;
809 case BFD_MACH_O_N_PBUD:
810 name = "PBUD";
811 break;
812 case BFD_MACH_O_N_SECT:
813 name = "SECT";
814 break;
815 default:
816 name = "???";
817 break;
818 }
819 if (name == NULL)
820 name = "";
821 fprintf (file, " %02x %-6s %02x %04x",
822 asym->n_type, name, asym->n_sect, asym->n_desc);
823 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
824 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
825 fprintf (file, " [%s]", symbol->section->name);
826 fprintf (file, " %s", symbol->name);
827 }
828 }
829
830 static void
831 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
832 bfd_mach_o_cpu_subtype msubtype,
833 enum bfd_architecture *type,
834 unsigned long *subtype)
835 {
836 *subtype = bfd_arch_unknown;
837
838 switch (mtype)
839 {
840 case BFD_MACH_O_CPU_TYPE_VAX:
841 *type = bfd_arch_vax;
842 break;
843 case BFD_MACH_O_CPU_TYPE_MC680x0:
844 *type = bfd_arch_m68k;
845 break;
846 case BFD_MACH_O_CPU_TYPE_I386:
847 *type = bfd_arch_i386;
848 *subtype = bfd_mach_i386_i386;
849 break;
850 case BFD_MACH_O_CPU_TYPE_X86_64:
851 *type = bfd_arch_i386;
852 *subtype = bfd_mach_x86_64;
853 break;
854 case BFD_MACH_O_CPU_TYPE_MIPS:
855 *type = bfd_arch_mips;
856 break;
857 case BFD_MACH_O_CPU_TYPE_MC98000:
858 *type = bfd_arch_m98k;
859 break;
860 case BFD_MACH_O_CPU_TYPE_HPPA:
861 *type = bfd_arch_hppa;
862 break;
863 case BFD_MACH_O_CPU_TYPE_ARM:
864 *type = bfd_arch_arm;
865 switch (msubtype)
866 {
867 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
868 *subtype = bfd_mach_arm_4T;
869 break;
870 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
871 *subtype = bfd_mach_arm_4T; /* Best fit ? */
872 break;
873 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
874 *subtype = bfd_mach_arm_5TE;
875 break;
876 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
877 *subtype = bfd_mach_arm_XScale;
878 break;
879 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
880 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
881 break;
882 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
883 default:
884 break;
885 }
886 break;
887 case BFD_MACH_O_CPU_TYPE_MC88000:
888 *type = bfd_arch_m88k;
889 break;
890 case BFD_MACH_O_CPU_TYPE_SPARC:
891 *type = bfd_arch_sparc;
892 *subtype = bfd_mach_sparc;
893 break;
894 case BFD_MACH_O_CPU_TYPE_I860:
895 *type = bfd_arch_i860;
896 break;
897 case BFD_MACH_O_CPU_TYPE_ALPHA:
898 *type = bfd_arch_alpha;
899 break;
900 case BFD_MACH_O_CPU_TYPE_POWERPC:
901 *type = bfd_arch_powerpc;
902 *subtype = bfd_mach_ppc;
903 break;
904 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
905 *type = bfd_arch_powerpc;
906 *subtype = bfd_mach_ppc64;
907 break;
908 default:
909 *type = bfd_arch_unknown;
910 break;
911 }
912 }
913
914 static bfd_boolean
915 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
916 {
917 struct mach_o_header_external raw;
918 unsigned int size;
919
920 size = mach_o_wide_p (header) ?
921 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
922
923 bfd_h_put_32 (abfd, header->magic, raw.magic);
924 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
925 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
926 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
927 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
928 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
929 bfd_h_put_32 (abfd, header->flags, raw.flags);
930
931 if (mach_o_wide_p (header))
932 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
933
934 if (bfd_seek (abfd, 0, SEEK_SET) != 0
935 || bfd_bwrite (&raw, size, abfd) != size)
936 return FALSE;
937
938 return TRUE;
939 }
940
941 static int
942 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
943 {
944 bfd_mach_o_thread_command *cmd = &command->command.thread;
945 unsigned int i;
946 struct mach_o_thread_command_external raw;
947 unsigned int offset;
948
949 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
950 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
951
952 offset = 8;
953 for (i = 0; i < cmd->nflavours; i++)
954 {
955 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
956 BFD_ASSERT (cmd->flavours[i].offset ==
957 (command->offset + offset + BFD_MACH_O_LC_SIZE));
958
959 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
960 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
961
962 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
963 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
964 return -1;
965
966 offset += cmd->flavours[i].size + sizeof (raw);
967 }
968
969 return 0;
970 }
971
972 long
973 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
974 asection *asect)
975 {
976 return (asect->reloc_count + 1) * sizeof (arelent *);
977 }
978
979 /* In addition to the need to byte-swap the symbol number, the bit positions
980 of the fields in the relocation information vary per target endian-ness. */
981
982 static void
983 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
984 unsigned char *fields)
985 {
986 unsigned char info = fields[3];
987
988 if (bfd_big_endian (abfd))
989 {
990 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
991 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
992 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
993 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
994 & BFD_MACH_O_LENGTH_MASK;
995 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
996 }
997 else
998 {
999 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1000 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1001 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1002 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1003 & BFD_MACH_O_LENGTH_MASK;
1004 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1005 }
1006 }
1007
1008 static int
1009 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1010 struct mach_o_reloc_info_external *raw,
1011 arelent *res, asymbol **syms)
1012 {
1013 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1014 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1015 bfd_mach_o_reloc_info reloc;
1016 bfd_vma addr;
1017 asymbol **sym;
1018
1019 addr = bfd_get_32 (abfd, raw->r_address);
1020 res->sym_ptr_ptr = NULL;
1021 res->addend = 0;
1022
1023 if (addr & BFD_MACH_O_SR_SCATTERED)
1024 {
1025 unsigned int j;
1026 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1027
1028 /* Scattered relocation, can't be extern. */
1029 reloc.r_scattered = 1;
1030 reloc.r_extern = 0;
1031
1032 /* Extract section and offset from r_value (symnum). */
1033 reloc.r_value = symnum;
1034 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1035 end of the data for the section (e.g. in a calculation of section
1036 data length). At present, the symbol will end up associated with
1037 the following section or, if it falls within alignment padding, as
1038 null - which will assert later. */
1039 for (j = 0; j < mdata->nsects; j++)
1040 {
1041 bfd_mach_o_section *sect = mdata->sections[j];
1042 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1043 {
1044 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1045 res->addend = symnum - sect->addr;
1046 break;
1047 }
1048 }
1049
1050 /* Extract the info and address fields from r_address. */
1051 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1052 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1053 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1054 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1055 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1056 }
1057 else
1058 {
1059 unsigned int num;
1060
1061 /* Non-scattered relocation. */
1062 reloc.r_scattered = 0;
1063
1064 /* The value and info fields have to be extracted dependent on target
1065 endian-ness. */
1066 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1067 num = reloc.r_value;
1068
1069 if (reloc.r_extern)
1070 {
1071 /* An external symbol number. */
1072 sym = syms + num;
1073 }
1074 else if (num == 0x00ffffff)
1075 {
1076 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1077 is generic code, we don't know wether this is really a PAIR.
1078 This value is almost certainly not a valid section number, hence
1079 this specific case to avoid an assertion failure.
1080 Target specific swap_reloc_in routine should adjust that. */
1081 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1082 }
1083 else
1084 {
1085 /* A section number. */
1086 BFD_ASSERT (num != 0);
1087 BFD_ASSERT (num <= mdata->nsects);
1088
1089 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1090 /* For a symbol defined in section S, the addend (stored in the
1091 binary) contains the address of the section. To comply with
1092 bfd convention, subtract the section address.
1093 Use the address from the header, so that the user can modify
1094 the vma of the section. */
1095 res->addend = -mdata->sections[num - 1]->addr;
1096 }
1097 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1098 in the lower 16bits of the address value. So we have to find the
1099 'symbol' from the preceding reloc. We do this even though the
1100 section symbol is probably not needed here, because NULL symbol
1101 values cause an assert in generic BFD code. This must be done in
1102 the PPC swap_reloc_in routine. */
1103 res->sym_ptr_ptr = sym;
1104
1105 /* The 'address' is just r_address.
1106 ??? maybe this should be masked with 0xffffff for safety. */
1107 res->address = addr;
1108 reloc.r_address = addr;
1109 }
1110
1111 /* We have set up a reloc with all the information present, so the swapper
1112 can modify address, value and addend fields, if necessary, to convey
1113 information in the generic BFD reloc that is mach-o specific. */
1114
1115 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1116 return -1;
1117 return 0;
1118 }
1119
1120 static int
1121 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1122 unsigned long count,
1123 arelent *res, asymbol **syms)
1124 {
1125 unsigned long i;
1126 struct mach_o_reloc_info_external *native_relocs;
1127 bfd_size_type native_size;
1128
1129 /* Allocate and read relocs. */
1130 native_size = count * BFD_MACH_O_RELENT_SIZE;
1131 native_relocs =
1132 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1133 if (native_relocs == NULL)
1134 return -1;
1135
1136 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1137 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1138 goto err;
1139
1140 for (i = 0; i < count; i++)
1141 {
1142 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1143 &res[i], syms) < 0)
1144 goto err;
1145 }
1146 free (native_relocs);
1147 return i;
1148 err:
1149 free (native_relocs);
1150 return -1;
1151 }
1152
1153 long
1154 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1155 arelent **rels, asymbol **syms)
1156 {
1157 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1158 unsigned long i;
1159 arelent *res;
1160
1161 if (asect->reloc_count == 0)
1162 return 0;
1163
1164 /* No need to go further if we don't know how to read relocs. */
1165 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1166 return 0;
1167
1168 if (asect->relocation == NULL)
1169 {
1170 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1171 if (res == NULL)
1172 return -1;
1173
1174 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1175 asect->reloc_count, res, syms) < 0)
1176 {
1177 free (res);
1178 return -1;
1179 }
1180 asect->relocation = res;
1181 }
1182
1183 res = asect->relocation;
1184 for (i = 0; i < asect->reloc_count; i++)
1185 rels[i] = &res[i];
1186 rels[i] = NULL;
1187
1188 return i;
1189 }
1190
1191 long
1192 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1193 {
1194 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1195
1196 if (mdata->dysymtab == NULL)
1197 return 1;
1198 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1199 * sizeof (arelent *);
1200 }
1201
1202 long
1203 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1204 struct bfd_symbol **syms)
1205 {
1206 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1207 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1208 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1209 unsigned long i;
1210 arelent *res;
1211
1212 if (dysymtab == NULL)
1213 return 0;
1214 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1215 return 0;
1216
1217 /* No need to go further if we don't know how to read relocs. */
1218 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1219 return 0;
1220
1221 if (mdata->dyn_reloc_cache == NULL)
1222 {
1223 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1224 * sizeof (arelent));
1225 if (res == NULL)
1226 return -1;
1227
1228 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1229 dysymtab->nextrel, res, syms) < 0)
1230 {
1231 free (res);
1232 return -1;
1233 }
1234
1235 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1236 dysymtab->nlocrel,
1237 res + dysymtab->nextrel, syms) < 0)
1238 {
1239 free (res);
1240 return -1;
1241 }
1242
1243 mdata->dyn_reloc_cache = res;
1244 }
1245
1246 res = mdata->dyn_reloc_cache;
1247 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1248 rels[i] = &res[i];
1249 rels[i] = NULL;
1250 return i;
1251 }
1252
1253 /* In addition to the need to byte-swap the symbol number, the bit positions
1254 of the fields in the relocation information vary per target endian-ness. */
1255
1256 static void
1257 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1258 bfd_mach_o_reloc_info *rel)
1259 {
1260 unsigned char info = 0;
1261
1262 BFD_ASSERT (rel->r_type <= 15);
1263 BFD_ASSERT (rel->r_length <= 3);
1264
1265 if (bfd_big_endian (abfd))
1266 {
1267 fields[0] = (rel->r_value >> 16) & 0xff;
1268 fields[1] = (rel->r_value >> 8) & 0xff;
1269 fields[2] = rel->r_value & 0xff;
1270 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1271 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1272 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1273 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1274 }
1275 else
1276 {
1277 fields[2] = (rel->r_value >> 16) & 0xff;
1278 fields[1] = (rel->r_value >> 8) & 0xff;
1279 fields[0] = rel->r_value & 0xff;
1280 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1281 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1282 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1283 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1284 }
1285 fields[3] = info;
1286 }
1287
1288 static bfd_boolean
1289 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1290 {
1291 unsigned int i;
1292 arelent **entries;
1293 asection *sec;
1294 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1295
1296 sec = section->bfdsection;
1297 if (sec->reloc_count == 0)
1298 return TRUE;
1299
1300 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1301 return TRUE;
1302
1303 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1304 return FALSE;
1305
1306 /* Convert and write. */
1307 entries = section->bfdsection->orelocation;
1308 for (i = 0; i < section->nreloc; i++)
1309 {
1310 arelent *rel = entries[i];
1311 struct mach_o_reloc_info_external raw;
1312 bfd_mach_o_reloc_info info, *pinfo = &info;
1313
1314 /* Convert relocation to an intermediate representation. */
1315 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1316 return FALSE;
1317
1318 /* Lower the relocation info. */
1319 if (pinfo->r_scattered)
1320 {
1321 unsigned long v;
1322
1323 v = BFD_MACH_O_SR_SCATTERED
1324 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1325 | BFD_MACH_O_SET_SR_LENGTH(pinfo->r_length)
1326 | BFD_MACH_O_SET_SR_TYPE(pinfo->r_type)
1327 | BFD_MACH_O_SET_SR_ADDRESS(pinfo->r_address);
1328 /* Note: scattered relocs have field in reverse order... */
1329 bfd_put_32 (abfd, v, raw.r_address);
1330 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1331 }
1332 else
1333 {
1334 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1335 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1336 pinfo);
1337 }
1338
1339 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1340 != BFD_MACH_O_RELENT_SIZE)
1341 return FALSE;
1342 }
1343 return TRUE;
1344 }
1345
1346 static int
1347 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1348 {
1349 struct mach_o_section_32_external raw;
1350
1351 memcpy (raw.sectname, section->sectname, 16);
1352 memcpy (raw.segname, section->segname, 16);
1353 bfd_h_put_32 (abfd, section->addr, raw.addr);
1354 bfd_h_put_32 (abfd, section->size, raw.size);
1355 bfd_h_put_32 (abfd, section->offset, raw.offset);
1356 bfd_h_put_32 (abfd, section->align, raw.align);
1357 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1358 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1359 bfd_h_put_32 (abfd, section->flags, raw.flags);
1360 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1361 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1362
1363 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1364 != BFD_MACH_O_SECTION_SIZE)
1365 return -1;
1366
1367 return 0;
1368 }
1369
1370 static int
1371 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1372 {
1373 struct mach_o_section_64_external raw;
1374
1375 memcpy (raw.sectname, section->sectname, 16);
1376 memcpy (raw.segname, section->segname, 16);
1377 bfd_h_put_64 (abfd, section->addr, raw.addr);
1378 bfd_h_put_64 (abfd, section->size, raw.size);
1379 bfd_h_put_32 (abfd, section->offset, raw.offset);
1380 bfd_h_put_32 (abfd, section->align, raw.align);
1381 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1382 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1383 bfd_h_put_32 (abfd, section->flags, raw.flags);
1384 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1385 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1386 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1387
1388 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1389 != BFD_MACH_O_SECTION_64_SIZE)
1390 return -1;
1391
1392 return 0;
1393 }
1394
1395 static int
1396 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1397 {
1398 struct mach_o_segment_command_32_external raw;
1399 bfd_mach_o_segment_command *seg = &command->command.segment;
1400 bfd_mach_o_section *sec;
1401
1402 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1403
1404 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1405 if (!bfd_mach_o_write_relocs (abfd, sec))
1406 return -1;
1407
1408 memcpy (raw.segname, seg->segname, 16);
1409 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1410 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1411 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1412 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1413 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1414 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1415 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1416 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1417
1418 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1419 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1420 return -1;
1421
1422 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1423 if (bfd_mach_o_write_section_32 (abfd, sec))
1424 return -1;
1425
1426 return 0;
1427 }
1428
1429 static int
1430 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1431 {
1432 struct mach_o_segment_command_64_external raw;
1433 bfd_mach_o_segment_command *seg = &command->command.segment;
1434 bfd_mach_o_section *sec;
1435
1436 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1437
1438 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1439 if (!bfd_mach_o_write_relocs (abfd, sec))
1440 return -1;
1441
1442 memcpy (raw.segname, seg->segname, 16);
1443 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1444 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1445 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1446 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1447 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1448 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1449 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1450 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1451
1452 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1453 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1454 return -1;
1455
1456 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1457 if (bfd_mach_o_write_section_64 (abfd, sec))
1458 return -1;
1459
1460 return 0;
1461 }
1462
1463 static bfd_boolean
1464 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1465 {
1466 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1467 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1468 unsigned long i;
1469 unsigned int wide = bfd_mach_o_wide_p (abfd);
1470 unsigned int symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
1471 struct bfd_strtab_hash *strtab;
1472 asymbol **symbols = bfd_get_outsymbols (abfd);
1473
1474 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1475
1476 /* Write the symbols first. */
1477 mdata->filelen = FILE_ALIGN(mdata->filelen, wide ? 3 : 2);
1478 sym->symoff = mdata->filelen;
1479 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1480 return FALSE;
1481
1482 sym->nsyms = bfd_get_symcount (abfd);
1483 mdata->filelen += sym->nsyms * symlen;
1484
1485 strtab = _bfd_stringtab_init ();
1486 if (strtab == NULL)
1487 return FALSE;
1488
1489 if (sym->nsyms > 0)
1490 /* Although we don't strictly need to do this, for compatibility with
1491 Darwin system tools, actually output an empty string for the index
1492 0 entry. */
1493 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1494
1495 for (i = 0; i < sym->nsyms; i++)
1496 {
1497 bfd_size_type str_index;
1498 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1499
1500 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1501 /* An index of 0 always means the empty string. */
1502 str_index = 0;
1503 else
1504 {
1505 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1506
1507 if (str_index == (bfd_size_type) -1)
1508 goto err;
1509 }
1510
1511 if (wide)
1512 {
1513 struct mach_o_nlist_64_external raw;
1514
1515 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1516 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1517 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1518 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1519 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1520 raw.n_value);
1521
1522 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1523 goto err;
1524 }
1525 else
1526 {
1527 struct mach_o_nlist_external raw;
1528
1529 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1530 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1531 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1532 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1533 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1534 raw.n_value);
1535
1536 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1537 goto err;
1538 }
1539 }
1540 sym->strsize = _bfd_stringtab_size (strtab);
1541 sym->stroff = mdata->filelen;
1542 mdata->filelen += sym->strsize;
1543
1544 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1545 goto err;
1546 _bfd_stringtab_free (strtab);
1547
1548 /* The command. */
1549 {
1550 struct mach_o_symtab_command_external raw;
1551
1552 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1553 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1554 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1555 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1556
1557 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1558 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1559 return FALSE;
1560 }
1561
1562 return TRUE;
1563
1564 err:
1565 _bfd_stringtab_free (strtab);
1566 return FALSE;
1567 }
1568
1569 /* Write a dysymtab command.
1570 TODO: Possibly coalesce writes of smaller objects. */
1571
1572 static bfd_boolean
1573 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
1574 {
1575 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
1576
1577 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
1578
1579 if (cmd->nmodtab != 0)
1580 {
1581 unsigned int i;
1582
1583 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
1584 return FALSE;
1585
1586 for (i = 0; i < cmd->nmodtab; i++)
1587 {
1588 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
1589 unsigned int iinit;
1590 unsigned int ninit;
1591
1592 iinit = module->iinit & 0xffff;
1593 iinit |= ((module->iterm & 0xffff) << 16);
1594
1595 ninit = module->ninit & 0xffff;
1596 ninit |= ((module->nterm & 0xffff) << 16);
1597
1598 if (bfd_mach_o_wide_p (abfd))
1599 {
1600 struct mach_o_dylib_module_64_external w;
1601
1602 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
1603 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
1604 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
1605 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
1606 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
1607 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
1608 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
1609 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
1610 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
1611 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
1612 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
1613 bfd_h_put_64 (abfd, module->objc_module_info_addr,
1614 &w.objc_module_info_addr);
1615 bfd_h_put_32 (abfd, module->objc_module_info_size,
1616 &w.objc_module_info_size);
1617
1618 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
1619 return FALSE;
1620 }
1621 else
1622 {
1623 struct mach_o_dylib_module_external n;
1624
1625 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
1626 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
1627 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
1628 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
1629 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
1630 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
1631 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
1632 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
1633 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
1634 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
1635 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
1636 bfd_h_put_32 (abfd, module->objc_module_info_addr,
1637 &n.objc_module_info_addr);
1638 bfd_h_put_32 (abfd, module->objc_module_info_size,
1639 &n.objc_module_info_size);
1640
1641 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
1642 return FALSE;
1643 }
1644 }
1645 }
1646
1647 if (cmd->ntoc != 0)
1648 {
1649 unsigned int i;
1650
1651 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
1652 return FALSE;
1653
1654 for (i = 0; i < cmd->ntoc; i++)
1655 {
1656 struct mach_o_dylib_table_of_contents_external raw;
1657 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
1658
1659 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
1660 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
1661
1662 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1663 return FALSE;
1664 }
1665 }
1666
1667 if (cmd->nindirectsyms > 0)
1668 {
1669 unsigned int i;
1670
1671 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
1672 return FALSE;
1673
1674 for (i = 0; i < cmd->nindirectsyms; ++i)
1675 {
1676 unsigned char raw[4];
1677
1678 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
1679 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1680 return FALSE;
1681 }
1682 }
1683
1684 if (cmd->nextrefsyms != 0)
1685 {
1686 unsigned int i;
1687
1688 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
1689 return FALSE;
1690
1691 for (i = 0; i < cmd->nextrefsyms; i++)
1692 {
1693 unsigned long v;
1694 unsigned char raw[4];
1695 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
1696
1697 /* Fields isym and flags are written as bit-fields, thus we need
1698 a specific processing for endianness. */
1699
1700 if (bfd_big_endian (abfd))
1701 {
1702 v = ((ref->isym & 0xffffff) << 8);
1703 v |= ref->flags & 0xff;
1704 }
1705 else
1706 {
1707 v = ref->isym & 0xffffff;
1708 v |= ((ref->flags & 0xff) << 24);
1709 }
1710
1711 bfd_h_put_32 (abfd, v, raw);
1712 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1713 return FALSE;
1714 }
1715 }
1716
1717 /* The command. */
1718 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
1719 return FALSE;
1720 else
1721 {
1722 struct mach_o_dysymtab_command_external raw;
1723
1724 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
1725 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
1726 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
1727 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
1728 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
1729 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
1730 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
1731 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
1732 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
1733 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
1734 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
1735 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
1736 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
1737 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
1738 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
1739 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
1740 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
1741 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
1742
1743 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1744 return FALSE;
1745 }
1746
1747 return TRUE;
1748 }
1749
1750 static unsigned
1751 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
1752 {
1753 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
1754
1755 /* Just leave debug symbols where they are (pretend they are local, and
1756 then they will just be sorted on position). */
1757 if (s->n_type & BFD_MACH_O_N_STAB)
1758 return 0;
1759
1760 /* Local (we should never see an undefined local AFAICT). */
1761 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
1762 return 0;
1763
1764 /* Common symbols look like undefined externs. */
1765 if (mtyp == BFD_MACH_O_N_UNDF)
1766 return 2;
1767
1768 /* A defined non-local, non-debug symbol. */
1769 return 1;
1770 }
1771
1772 static int
1773 bfd_mach_o_cf_symbols (const void *a, const void *b)
1774 {
1775 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
1776 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
1777 unsigned int soa, sob;
1778
1779 soa = bfd_mach_o_primary_symbol_sort_key (sa);
1780 sob = bfd_mach_o_primary_symbol_sort_key (sb);
1781 if (soa < sob)
1782 return -1;
1783
1784 if (soa > sob)
1785 return 1;
1786
1787 /* If it's local or stab, just preserve the input order. */
1788 if (soa == 0)
1789 {
1790 if (sa->symbol.udata.i < sb->symbol.udata.i)
1791 return -1;
1792 if (sa->symbol.udata.i > sb->symbol.udata.i)
1793 return 1;
1794
1795 /* This is probably an error. */
1796 return 0;
1797 }
1798
1799 /* The second sort key is name. */
1800 return strcmp (sa->symbol.name, sb->symbol.name);
1801 }
1802
1803 /* Process the symbols.
1804
1805 This should be OK for single-module files - but it is not likely to work
1806 for multi-module shared libraries.
1807
1808 (a) If the application has not filled in the relevant mach-o fields, make
1809 an estimate.
1810
1811 (b) Order them, like this:
1812 ( i) local.
1813 (unsorted)
1814 ( ii) external defined
1815 (by name)
1816 (iii) external undefined/common
1817 (by name)
1818 ( iv) common
1819 (by name)
1820 */
1821
1822 static bfd_boolean
1823 bfd_mach_o_mangle_symbols (bfd *abfd)
1824 {
1825 unsigned long i;
1826 asymbol **symbols = bfd_get_outsymbols (abfd);
1827
1828 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
1829 return TRUE;
1830
1831 for (i = 0; i < bfd_get_symcount (abfd); i++)
1832 {
1833 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1834
1835 /* We use this value, which is out-of-range as a symbol index, to signal
1836 that the mach-o-specific data are not filled in and need to be created
1837 from the bfd values. It is much preferable for the application to do
1838 this, since more meaningful diagnostics can be made that way. */
1839
1840 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
1841 {
1842 /* No symbol information has been set - therefore determine
1843 it from the bfd symbol flags/info. */
1844 if (s->symbol.section == bfd_abs_section_ptr)
1845 s->n_type = BFD_MACH_O_N_ABS;
1846 else if (s->symbol.section == bfd_und_section_ptr)
1847 {
1848 s->n_type = BFD_MACH_O_N_UNDF;
1849 if (s->symbol.flags & BSF_WEAK)
1850 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
1851 /* mach-o automatically makes undefined symbols extern. */
1852 s->n_type |= BFD_MACH_O_N_EXT;
1853 s->symbol.flags |= BSF_GLOBAL;
1854 }
1855 else if (s->symbol.section == bfd_com_section_ptr)
1856 {
1857 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
1858 s->symbol.flags |= BSF_GLOBAL;
1859 }
1860 else
1861 s->n_type = BFD_MACH_O_N_SECT;
1862
1863 if (s->symbol.flags & BSF_GLOBAL)
1864 s->n_type |= BFD_MACH_O_N_EXT;
1865 }
1866
1867 /* Put the section index in, where required. */
1868 if ((s->symbol.section != bfd_abs_section_ptr
1869 && s->symbol.section != bfd_und_section_ptr
1870 && s->symbol.section != bfd_com_section_ptr)
1871 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
1872 && s->symbol.name == NULL))
1873 s->n_sect = s->symbol.section->target_index;
1874
1875 /* Number to preserve order for local and debug syms. */
1876 s->symbol.udata.i = i;
1877 }
1878
1879 /* Sort the symbols. */
1880 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
1881 sizeof (asymbol *), bfd_mach_o_cf_symbols);
1882
1883 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1884 {
1885 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1886 s->symbol.udata.i = i; /* renumber. */
1887 }
1888
1889 return TRUE;
1890 }
1891
1892 /* We build a flat table of sections, which can be re-ordered if necessary.
1893 Fill in the section number and other mach-o-specific data. */
1894
1895 static bfd_boolean
1896 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
1897 {
1898 asection *sec;
1899 unsigned target_index;
1900 unsigned nsect;
1901
1902 nsect = bfd_count_sections (abfd);
1903
1904 /* Don't do it if it's already set - assume the application knows what it's
1905 doing. */
1906 if (mdata->nsects == nsect
1907 && (mdata->nsects == 0 || mdata->sections != NULL))
1908 return TRUE;
1909
1910 mdata->nsects = nsect;
1911 mdata->sections = bfd_alloc (abfd,
1912 mdata->nsects * sizeof (bfd_mach_o_section *));
1913 if (mdata->sections == NULL)
1914 return FALSE;
1915
1916 /* We need to check that this can be done... */
1917 if (nsect > 255)
1918 (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
1919 " maximum is 255,\n"), nsect);
1920
1921 /* Create Mach-O sections.
1922 Section type, attribute and align should have been set when the
1923 section was created - either read in or specified. */
1924 target_index = 0;
1925 for (sec = abfd->sections; sec; sec = sec->next)
1926 {
1927 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
1928 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
1929
1930 mdata->sections[target_index] = msect;
1931
1932 msect->addr = bfd_get_section_vma (abfd, sec);
1933 msect->size = bfd_get_section_size (sec);
1934
1935 /* Use the largest alignment set, in case it was bumped after the
1936 section was created. */
1937 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
1938
1939 msect->offset = 0;
1940 sec->target_index = ++target_index;
1941 }
1942
1943 return TRUE;
1944 }
1945
1946 bfd_boolean
1947 bfd_mach_o_write_contents (bfd *abfd)
1948 {
1949 unsigned int i;
1950 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1951
1952 /* Make the commands, if not already present. */
1953 if (mdata->header.ncmds == 0)
1954 if (!bfd_mach_o_build_commands (abfd))
1955 return FALSE;
1956
1957 if (!bfd_mach_o_write_header (abfd, &mdata->header))
1958 return FALSE;
1959
1960 for (i = 0; i < mdata->header.ncmds; i++)
1961 {
1962 struct mach_o_load_command_external raw;
1963 bfd_mach_o_load_command *cur = &mdata->commands[i];
1964 unsigned long typeflag;
1965
1966 typeflag = cur->type | (cur->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
1967
1968 bfd_h_put_32 (abfd, typeflag, raw.cmd);
1969 bfd_h_put_32 (abfd, cur->len, raw.cmdsize);
1970
1971 if (bfd_seek (abfd, cur->offset, SEEK_SET) != 0
1972 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
1973 return FALSE;
1974
1975 switch (cur->type)
1976 {
1977 case BFD_MACH_O_LC_SEGMENT:
1978 if (bfd_mach_o_write_segment_32 (abfd, cur) != 0)
1979 return FALSE;
1980 break;
1981 case BFD_MACH_O_LC_SEGMENT_64:
1982 if (bfd_mach_o_write_segment_64 (abfd, cur) != 0)
1983 return FALSE;
1984 break;
1985 case BFD_MACH_O_LC_SYMTAB:
1986 if (!bfd_mach_o_write_symtab (abfd, cur))
1987 return FALSE;
1988 break;
1989 case BFD_MACH_O_LC_DYSYMTAB:
1990 if (!bfd_mach_o_write_dysymtab (abfd, cur))
1991 return FALSE;
1992 break;
1993 case BFD_MACH_O_LC_SYMSEG:
1994 break;
1995 case BFD_MACH_O_LC_THREAD:
1996 case BFD_MACH_O_LC_UNIXTHREAD:
1997 if (bfd_mach_o_write_thread (abfd, cur) != 0)
1998 return FALSE;
1999 break;
2000 case BFD_MACH_O_LC_LOADFVMLIB:
2001 case BFD_MACH_O_LC_IDFVMLIB:
2002 case BFD_MACH_O_LC_IDENT:
2003 case BFD_MACH_O_LC_FVMFILE:
2004 case BFD_MACH_O_LC_PREPAGE:
2005 case BFD_MACH_O_LC_LOAD_DYLIB:
2006 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
2007 case BFD_MACH_O_LC_ID_DYLIB:
2008 case BFD_MACH_O_LC_REEXPORT_DYLIB:
2009 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
2010 case BFD_MACH_O_LC_LOAD_DYLINKER:
2011 case BFD_MACH_O_LC_ID_DYLINKER:
2012 case BFD_MACH_O_LC_PREBOUND_DYLIB:
2013 case BFD_MACH_O_LC_ROUTINES:
2014 case BFD_MACH_O_LC_SUB_FRAMEWORK:
2015 break;
2016 default:
2017 (*_bfd_error_handler) (_("unable to write unknown load command 0x%lx"),
2018 (unsigned long) cur->type);
2019 return FALSE;
2020 }
2021 }
2022
2023 return TRUE;
2024 }
2025
2026 static void
2027 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2028 asection *sec)
2029 {
2030 bfd_mach_o_section *s = (bfd_mach_o_section *)sec->used_by_bfd;
2031 if (seg->sect_head == NULL)
2032 seg->sect_head = s;
2033 else
2034 seg->sect_tail->next = s;
2035 seg->sect_tail = s;
2036 }
2037
2038 /* Create section Mach-O flags from BFD flags. */
2039
2040 static void
2041 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2042 {
2043 flagword bfd_flags;
2044 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2045
2046 /* Create default flags. */
2047 bfd_flags = bfd_get_section_flags (abfd, sec);
2048 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2049 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2050 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2051 | BFD_MACH_O_S_REGULAR;
2052 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2053 s->flags = BFD_MACH_O_S_ZEROFILL;
2054 else if (bfd_flags & SEC_DEBUGGING)
2055 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2056 else
2057 s->flags = BFD_MACH_O_S_REGULAR;
2058 }
2059
2060 /* Count the number of sections in the list for the segment named.
2061
2062 The special case of NULL or "" for the segment name is valid for
2063 an MH_OBJECT file and means 'all sections available'.
2064
2065 Requires that the sections table in mdata be filled in.
2066
2067 Returns the number of sections (0 is valid).
2068 Any number > 255 signals an invalid section count, although we will,
2069 perhaps, allow the file to be written (in line with Darwin tools up
2070 to XCode 4).
2071
2072 A section count of (unsigned long) -1 signals a definite error. */
2073
2074 static unsigned long
2075 bfd_mach_o_count_sections_for_seg (const char *segment,
2076 bfd_mach_o_data_struct *mdata)
2077 {
2078 unsigned i,j;
2079 if (mdata == NULL || mdata->sections == NULL)
2080 return (unsigned long) -1;
2081
2082 /* The MH_OBJECT case, all sections are considered; Although nsects is
2083 is an unsigned long, the maximum valid section count is 255 and this
2084 will have been checked already by mangle_sections. */
2085 if (segment == NULL || segment[0] == '\0')
2086 return mdata->nsects;
2087
2088 /* Count the number of sections we see in this segment. */
2089 j = 0;
2090 for (i = 0; i < mdata->nsects; ++i)
2091 {
2092 bfd_mach_o_section *s = mdata->sections[i];
2093 if (strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
2094 j++;
2095 }
2096 return j;
2097 }
2098
2099 static bfd_boolean
2100 bfd_mach_o_build_seg_command (const char *segment,
2101 bfd_mach_o_data_struct *mdata,
2102 bfd_mach_o_segment_command *seg)
2103 {
2104 unsigned i;
2105 int is_mho = (segment == NULL || segment[0] == '\0');
2106
2107 /* Fill segment command. */
2108 if (is_mho)
2109 memset (seg->segname, 0, sizeof (seg->segname));
2110 else
2111 strncpy (seg->segname, segment, sizeof (seg->segname));
2112
2113 /* TODO: fix this up for non-MH_OBJECT cases. */
2114 seg->vmaddr = 0;
2115 seg->vmsize = 0;
2116
2117 seg->fileoff = mdata->filelen;
2118 seg->filesize = 0;
2119 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2120 | BFD_MACH_O_PROT_EXECUTE;
2121 seg->initprot = seg->maxprot;
2122 seg->flags = 0;
2123 seg->sect_head = NULL;
2124 seg->sect_tail = NULL;
2125
2126 /* Append sections to the segment.
2127
2128 This is a little tedious, we have to honor the need to account zerofill
2129 sections after all the rest. This forces us to do the calculation of
2130 total vmsize in three passes so that any alignment increments are
2131 properly accounted. */
2132
2133 for (i = 0; i < mdata->nsects; ++i)
2134 {
2135 bfd_mach_o_section *s = mdata->sections[i];
2136 asection *sec = s->bfdsection;
2137
2138 /* If we're not making an MH_OBJECT, check whether this section is from
2139 our segment, and skip if not. Otherwise, just add all sections. */
2140 if (! is_mho
2141 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2142 continue;
2143
2144 /* Although we account for zerofill section sizes in vm order, they are
2145 placed in the file in source sequence. */
2146 bfd_mach_o_append_section_to_segment (seg, sec);
2147 s->offset = 0;
2148
2149 /* Zerofill sections have zero file size & offset,
2150 and are not written. */
2151 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2152 || (s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2153 == BFD_MACH_O_S_GB_ZEROFILL)
2154 continue;
2155
2156 if (s->size > 0)
2157 {
2158 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2159 seg->vmsize += s->size;
2160
2161 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2162 seg->filesize += s->size;
2163
2164 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2165 s->offset = mdata->filelen;
2166 }
2167
2168 sec->filepos = s->offset;
2169 mdata->filelen += s->size;
2170 }
2171
2172 /* Now pass through again, for zerofill, only now we just update the vmsize. */
2173 for (i = 0; i < mdata->nsects; ++i)
2174 {
2175 bfd_mach_o_section *s = mdata->sections[i];
2176
2177 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL)
2178 continue;
2179
2180 if (! is_mho
2181 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2182 continue;
2183
2184 if (s->size > 0)
2185 {
2186 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2187 seg->vmsize += s->size;
2188 }
2189 }
2190
2191 /* Now pass through again, for zerofill_GB. */
2192 for (i = 0; i < mdata->nsects; ++i)
2193 {
2194 bfd_mach_o_section *s = mdata->sections[i];
2195
2196 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_GB_ZEROFILL)
2197 continue;
2198
2199 if (! is_mho
2200 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2201 continue;
2202
2203 if (s->size > 0)
2204 {
2205 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2206 seg->vmsize += s->size;
2207 }
2208 }
2209
2210 /* Allocate space for the relocations. */
2211 mdata->filelen = FILE_ALIGN(mdata->filelen, 2);
2212
2213 for (i = 0; i < mdata->nsects; ++i)
2214 {
2215 bfd_mach_o_section *ms = mdata->sections[i];
2216 asection *sec = ms->bfdsection;
2217
2218 if ((ms->nreloc = sec->reloc_count) == 0)
2219 {
2220 ms->reloff = 0;
2221 continue;
2222 }
2223 sec->rel_filepos = mdata->filelen;
2224 ms->reloff = sec->rel_filepos;
2225 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2226 }
2227
2228 return TRUE;
2229 }
2230
2231 /* Count the number of indirect symbols in the image.
2232 Requires that the sections are in their final order. */
2233
2234 static unsigned int
2235 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2236 {
2237 unsigned int i;
2238 unsigned int nisyms = 0;
2239
2240 for (i = 0; i < mdata->nsects; ++i)
2241 {
2242 bfd_mach_o_section *sec = mdata->sections[i];
2243
2244 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2245 {
2246 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2247 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2248 case BFD_MACH_O_S_SYMBOL_STUBS:
2249 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2250 break;
2251 default:
2252 break;
2253 }
2254 }
2255 return nisyms;
2256 }
2257
2258 static bfd_boolean
2259 bfd_mach_o_build_dysymtab_command (bfd *abfd,
2260 bfd_mach_o_data_struct *mdata,
2261 bfd_mach_o_load_command *cmd)
2262 {
2263 bfd_mach_o_dysymtab_command *dsym = &cmd->command.dysymtab;
2264
2265 /* TODO:
2266 We are not going to try and fill these in yet and, moreover, we are
2267 going to bail if they are already set. */
2268 if (dsym->nmodtab != 0
2269 || dsym->ntoc != 0
2270 || dsym->nextrefsyms != 0)
2271 {
2272 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
2273 " implemented for dysymtab commands."));
2274 return FALSE;
2275 }
2276
2277 dsym->ilocalsym = 0;
2278
2279 if (bfd_get_symcount (abfd) > 0)
2280 {
2281 asymbol **symbols = bfd_get_outsymbols (abfd);
2282 unsigned long i;
2283
2284 /* Count the number of each kind of symbol. */
2285 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2286 {
2287 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2288 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2289 break;
2290 }
2291 dsym->nlocalsym = i;
2292 dsym->iextdefsym = i;
2293 for (; i < bfd_get_symcount (abfd); ++i)
2294 {
2295 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2296 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2297 break;
2298 }
2299 dsym->nextdefsym = i - dsym->nlocalsym;
2300 dsym->iundefsym = dsym->nextdefsym + dsym->iextdefsym;
2301 dsym->nundefsym = bfd_get_symcount (abfd)
2302 - dsym->nlocalsym
2303 - dsym->nextdefsym;
2304 }
2305 else
2306 {
2307 dsym->nlocalsym = 0;
2308 dsym->iextdefsym = 0;
2309 dsym->nextdefsym = 0;
2310 dsym->iundefsym = 0;
2311 dsym->nundefsym = 0;
2312 }
2313
2314 dsym->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2315 if (dsym->nindirectsyms > 0)
2316 {
2317 unsigned i;
2318 unsigned n;
2319
2320 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2321 dsym->indirectsymoff = mdata->filelen;
2322 mdata->filelen += dsym->nindirectsyms * 4;
2323
2324 dsym->indirect_syms = bfd_zalloc (abfd, dsym->nindirectsyms * 4);
2325 if (dsym->indirect_syms == NULL)
2326 return FALSE;
2327
2328 n = 0;
2329 for (i = 0; i < mdata->nsects; ++i)
2330 {
2331 bfd_mach_o_section *sec = mdata->sections[i];
2332
2333 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2334 {
2335 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2336 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2337 case BFD_MACH_O_S_SYMBOL_STUBS:
2338 {
2339 unsigned j, num;
2340 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2341
2342 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2343 if (isyms == NULL || num == 0)
2344 break;
2345 /* Record the starting index in the reserved1 field. */
2346 sec->reserved1 = n;
2347 for (j = 0; j < num; j++, n++)
2348 {
2349 if (isyms[j] == NULL)
2350 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2351 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2352 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2353 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2354 | BFD_MACH_O_INDIRECT_SYM_ABS;
2355 else
2356 dsym->indirect_syms[n] = isyms[j]->symbol.udata.i;
2357 }
2358 }
2359 break;
2360 default:
2361 break;
2362 }
2363 }
2364 }
2365
2366 return TRUE;
2367 }
2368
2369 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2370 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2371 and copy functionality. */
2372
2373 bfd_boolean
2374 bfd_mach_o_build_commands (bfd *abfd)
2375 {
2376 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2377 unsigned wide = mach_o_wide_p (&mdata->header);
2378 int segcmd_idx = -1;
2379 int symtab_idx = -1;
2380 int dysymtab_idx = -1;
2381 unsigned long base_offset = 0;
2382
2383 /* Return now if commands are already present. */
2384 if (mdata->header.ncmds)
2385 return FALSE;
2386
2387 /* Fill in the file type, if not already set. */
2388
2389 if (mdata->header.filetype == 0)
2390 {
2391 if (abfd->flags & EXEC_P)
2392 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2393 else if (abfd->flags & DYNAMIC)
2394 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2395 else
2396 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2397 }
2398
2399 /* If hasn't already been done, flatten sections list, and sort
2400 if/when required. Must be done before the symbol table is adjusted,
2401 since that depends on properly numbered sections. */
2402 if (mdata->nsects == 0 || mdata->sections == NULL)
2403 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2404 return FALSE;
2405
2406 /* Order the symbol table, fill-in/check mach-o specific fields and
2407 partition out any indirect symbols. */
2408 if (!bfd_mach_o_mangle_symbols (abfd))
2409 return FALSE;
2410
2411 /* Very simple command set (only really applicable to MH_OBJECTs):
2412 All the commands are optional - present only when there is suitable data.
2413 (i.e. it is valid to have an empty file)
2414
2415 a command (segment) to contain all the sections,
2416 command for the symbol table,
2417 a command for the dysymtab.
2418
2419 ??? maybe we should assert that this is an MH_OBJECT? */
2420
2421 if (mdata->nsects > 0)
2422 {
2423 segcmd_idx = 0;
2424 mdata->header.ncmds = 1;
2425 }
2426
2427 if (bfd_get_symcount (abfd) > 0)
2428 {
2429 mdata->header.ncmds++;
2430 symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */
2431 }
2432
2433 /* FIXME:
2434 This is a rather crude test for whether we should build a dysymtab. */
2435 if (bfd_mach_o_should_emit_dysymtab ()
2436 && bfd_get_symcount (abfd))
2437 {
2438 mdata->header.ncmds++;
2439 /* If there should be a case where a dysymtab could be emitted without
2440 a symtab (seems improbable), this would need amending. */
2441 dysymtab_idx = symtab_idx + 1;
2442 }
2443
2444 if (wide)
2445 base_offset = BFD_MACH_O_HEADER_64_SIZE;
2446 else
2447 base_offset = BFD_MACH_O_HEADER_SIZE;
2448
2449 /* Well, we must have a header, at least. */
2450 mdata->filelen = base_offset;
2451
2452 /* A bit unusual, but no content is valid;
2453 as -n empty.s -o empty.o */
2454 if (mdata->header.ncmds == 0)
2455 return TRUE;
2456
2457 mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds
2458 * sizeof (bfd_mach_o_load_command));
2459 if (mdata->commands == NULL)
2460 return FALSE;
2461
2462 if (segcmd_idx >= 0)
2463 {
2464 bfd_mach_o_load_command *cmd = &mdata->commands[segcmd_idx];
2465 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2466
2467 /* Count the segctions in the special blank segment used for MH_OBJECT. */
2468 seg->nsects = bfd_mach_o_count_sections_for_seg (NULL, mdata);
2469 if (seg->nsects == (unsigned long) -1)
2470 return FALSE;
2471
2472 /* Init segment command. */
2473 cmd->offset = base_offset;
2474 if (wide)
2475 {
2476 cmd->type = BFD_MACH_O_LC_SEGMENT_64;
2477 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2478 + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
2479 }
2480 else
2481 {
2482 cmd->type = BFD_MACH_O_LC_SEGMENT;
2483 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2484 + BFD_MACH_O_SECTION_SIZE * seg->nsects;
2485 }
2486
2487 cmd->type_required = FALSE;
2488 mdata->header.sizeofcmds = cmd->len;
2489 mdata->filelen += cmd->len;
2490 }
2491
2492 if (symtab_idx >= 0)
2493 {
2494 /* Init symtab command. */
2495 bfd_mach_o_load_command *cmd = &mdata->commands[symtab_idx];
2496
2497 cmd->type = BFD_MACH_O_LC_SYMTAB;
2498 cmd->offset = base_offset;
2499 if (segcmd_idx >= 0)
2500 cmd->offset += mdata->commands[segcmd_idx].len;
2501
2502 cmd->len = sizeof (struct mach_o_symtab_command_external)
2503 + BFD_MACH_O_LC_SIZE;
2504 cmd->type_required = FALSE;
2505 mdata->header.sizeofcmds += cmd->len;
2506 mdata->filelen += cmd->len;
2507 }
2508
2509 /* If required, setup symtab command, see comment above about the quality
2510 of this test. */
2511 if (dysymtab_idx >= 0)
2512 {
2513 bfd_mach_o_load_command *cmd = &mdata->commands[dysymtab_idx];
2514
2515 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
2516 if (symtab_idx >= 0)
2517 cmd->offset = mdata->commands[symtab_idx].offset
2518 + mdata->commands[symtab_idx].len;
2519 else if (segcmd_idx >= 0)
2520 cmd->offset = mdata->commands[segcmd_idx].offset
2521 + mdata->commands[segcmd_idx].len;
2522 else
2523 cmd->offset = base_offset;
2524
2525 cmd->type_required = FALSE;
2526 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2527 + BFD_MACH_O_LC_SIZE;
2528
2529 mdata->header.sizeofcmds += cmd->len;
2530 mdata->filelen += cmd->len;
2531 }
2532
2533 /* So, now we have sized the commands and the filelen set to that.
2534 Now we can build the segment command and set the section file offsets. */
2535 if (segcmd_idx >= 0
2536 && ! bfd_mach_o_build_seg_command
2537 (NULL, mdata, &mdata->commands[segcmd_idx].command.segment))
2538 return FALSE;
2539
2540 /* If we're doing a dysymtab, cmd points to its load command. */
2541 if (dysymtab_idx >= 0
2542 && ! bfd_mach_o_build_dysymtab_command (abfd, mdata,
2543 &mdata->commands[dysymtab_idx]))
2544 return FALSE;
2545
2546 /* The symtab command is filled in when the symtab is written. */
2547 return TRUE;
2548 }
2549
2550 /* Set the contents of a section. */
2551
2552 bfd_boolean
2553 bfd_mach_o_set_section_contents (bfd *abfd,
2554 asection *section,
2555 const void * location,
2556 file_ptr offset,
2557 bfd_size_type count)
2558 {
2559 file_ptr pos;
2560
2561 /* Trying to write the first section contents will trigger the creation of
2562 the load commands if they are not already present. */
2563 if (! abfd->output_has_begun && ! bfd_mach_o_build_commands (abfd))
2564 return FALSE;
2565
2566 if (count == 0)
2567 return TRUE;
2568
2569 pos = section->filepos + offset;
2570 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2571 || bfd_bwrite (location, count, abfd) != count)
2572 return FALSE;
2573
2574 return TRUE;
2575 }
2576
2577 int
2578 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
2579 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2580 {
2581 return 0;
2582 }
2583
2584 /* Make an empty symbol. This is required only because
2585 bfd_make_section_anyway wants to create a symbol for the section. */
2586
2587 asymbol *
2588 bfd_mach_o_make_empty_symbol (bfd *abfd)
2589 {
2590 asymbol *new_symbol;
2591
2592 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
2593 if (new_symbol == NULL)
2594 return new_symbol;
2595 new_symbol->the_bfd = abfd;
2596 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
2597 return new_symbol;
2598 }
2599
2600 static bfd_boolean
2601 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
2602 {
2603 struct mach_o_header_external raw;
2604 unsigned int size;
2605 bfd_vma (*get32) (const void *) = NULL;
2606
2607 /* Just read the magic number. */
2608 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2609 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
2610 return FALSE;
2611
2612 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2613 {
2614 header->byteorder = BFD_ENDIAN_BIG;
2615 header->magic = BFD_MACH_O_MH_MAGIC;
2616 header->version = 1;
2617 get32 = bfd_getb32;
2618 }
2619 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2620 {
2621 header->byteorder = BFD_ENDIAN_LITTLE;
2622 header->magic = BFD_MACH_O_MH_MAGIC;
2623 header->version = 1;
2624 get32 = bfd_getl32;
2625 }
2626 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2627 {
2628 header->byteorder = BFD_ENDIAN_BIG;
2629 header->magic = BFD_MACH_O_MH_MAGIC_64;
2630 header->version = 2;
2631 get32 = bfd_getb32;
2632 }
2633 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2634 {
2635 header->byteorder = BFD_ENDIAN_LITTLE;
2636 header->magic = BFD_MACH_O_MH_MAGIC_64;
2637 header->version = 2;
2638 get32 = bfd_getl32;
2639 }
2640 else
2641 {
2642 header->byteorder = BFD_ENDIAN_UNKNOWN;
2643 return FALSE;
2644 }
2645
2646 /* Once the size of the header is known, read the full header. */
2647 size = mach_o_wide_p (header) ?
2648 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2649
2650 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2651 || bfd_bread (&raw, size, abfd) != size)
2652 return FALSE;
2653
2654 header->cputype = (*get32) (raw.cputype);
2655 header->cpusubtype = (*get32) (raw.cpusubtype);
2656 header->filetype = (*get32) (raw.filetype);
2657 header->ncmds = (*get32) (raw.ncmds);
2658 header->sizeofcmds = (*get32) (raw.sizeofcmds);
2659 header->flags = (*get32) (raw.flags);
2660
2661 if (mach_o_wide_p (header))
2662 header->reserved = (*get32) (raw.reserved);
2663 else
2664 header->reserved = 0;
2665
2666 return TRUE;
2667 }
2668
2669 bfd_boolean
2670 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
2671 {
2672 bfd_mach_o_section *s;
2673 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
2674
2675 s = bfd_mach_o_get_mach_o_section (sec);
2676 if (s == NULL)
2677 {
2678 flagword bfd_flags;
2679 static const mach_o_section_name_xlat * xlat;
2680
2681 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
2682 if (s == NULL)
2683 return FALSE;
2684 sec->used_by_bfd = s;
2685 s->bfdsection = sec;
2686
2687 /* Create the Darwin seg/sect name pair from the bfd name.
2688 If this is a canonical name for which a specific paiting exists
2689 there will also be defined flags, type, attribute and alignment
2690 values. */
2691 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
2692 if (xlat != NULL)
2693 {
2694 s->flags = xlat->macho_sectype | xlat->macho_secattr;
2695 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
2696 : bfdalign;
2697 (void) bfd_set_section_alignment (abfd, sec, s->align);
2698 bfd_flags = bfd_get_section_flags (abfd, sec);
2699 if (bfd_flags == SEC_NO_FLAGS)
2700 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
2701 }
2702 else
2703 /* Create default flags. */
2704 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
2705 }
2706
2707 return _bfd_generic_new_section_hook (abfd, sec);
2708 }
2709
2710 static void
2711 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
2712 unsigned long prot)
2713 {
2714 flagword flags;
2715 bfd_mach_o_section *section;
2716
2717 flags = bfd_get_section_flags (abfd, sec);
2718 section = bfd_mach_o_get_mach_o_section (sec);
2719
2720 /* TODO: see if we should use the xlat system for doing this by
2721 preference and fall back to this for unknown sections. */
2722
2723 if (flags == SEC_NO_FLAGS)
2724 {
2725 /* Try to guess flags. */
2726 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
2727 flags = SEC_DEBUGGING;
2728 else
2729 {
2730 flags = SEC_ALLOC;
2731 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2732 != BFD_MACH_O_S_ZEROFILL)
2733 {
2734 flags |= SEC_LOAD;
2735 if (prot & BFD_MACH_O_PROT_EXECUTE)
2736 flags |= SEC_CODE;
2737 if (prot & BFD_MACH_O_PROT_WRITE)
2738 flags |= SEC_DATA;
2739 else if (prot & BFD_MACH_O_PROT_READ)
2740 flags |= SEC_READONLY;
2741 }
2742 }
2743 }
2744 else
2745 {
2746 if ((flags & SEC_DEBUGGING) == 0)
2747 flags |= SEC_ALLOC;
2748 }
2749
2750 if (section->offset != 0)
2751 flags |= SEC_HAS_CONTENTS;
2752 if (section->nreloc != 0)
2753 flags |= SEC_RELOC;
2754
2755 bfd_set_section_flags (abfd, sec, flags);
2756
2757 sec->vma = section->addr;
2758 sec->lma = section->addr;
2759 sec->size = section->size;
2760 sec->filepos = section->offset;
2761 sec->alignment_power = section->align;
2762 sec->segment_mark = 0;
2763 sec->reloc_count = section->nreloc;
2764 sec->rel_filepos = section->reloff;
2765 }
2766
2767 static asection *
2768 bfd_mach_o_make_bfd_section (bfd *abfd,
2769 const unsigned char *segname,
2770 const unsigned char *sectname)
2771 {
2772 const char *sname;
2773 flagword flags;
2774
2775 bfd_mach_o_convert_section_name_to_bfd
2776 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
2777 if (sname == NULL)
2778 return NULL;
2779
2780 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
2781 }
2782
2783 static asection *
2784 bfd_mach_o_read_section_32 (bfd *abfd,
2785 unsigned int offset,
2786 unsigned long prot)
2787 {
2788 struct mach_o_section_32_external raw;
2789 asection *sec;
2790 bfd_mach_o_section *section;
2791
2792 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2793 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
2794 != BFD_MACH_O_SECTION_SIZE))
2795 return NULL;
2796
2797 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2798 if (sec == NULL)
2799 return NULL;
2800
2801 section = bfd_mach_o_get_mach_o_section (sec);
2802 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2803 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2804 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2805 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2806 section->addr = bfd_h_get_32 (abfd, raw.addr);
2807 section->size = bfd_h_get_32 (abfd, raw.size);
2808 section->offset = bfd_h_get_32 (abfd, raw.offset);
2809 section->align = bfd_h_get_32 (abfd, raw.align);
2810 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2811 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2812 section->flags = bfd_h_get_32 (abfd, raw.flags);
2813 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2814 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2815 section->reserved3 = 0;
2816
2817 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2818
2819 return sec;
2820 }
2821
2822 static asection *
2823 bfd_mach_o_read_section_64 (bfd *abfd,
2824 unsigned int offset,
2825 unsigned long prot)
2826 {
2827 struct mach_o_section_64_external raw;
2828 asection *sec;
2829 bfd_mach_o_section *section;
2830
2831 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2832 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
2833 != BFD_MACH_O_SECTION_64_SIZE))
2834 return NULL;
2835
2836 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2837 if (sec == NULL)
2838 return NULL;
2839
2840 section = bfd_mach_o_get_mach_o_section (sec);
2841 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2842 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2843 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2844 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2845 section->addr = bfd_h_get_64 (abfd, raw.addr);
2846 section->size = bfd_h_get_64 (abfd, raw.size);
2847 section->offset = bfd_h_get_32 (abfd, raw.offset);
2848 section->align = bfd_h_get_32 (abfd, raw.align);
2849 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2850 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2851 section->flags = bfd_h_get_32 (abfd, raw.flags);
2852 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2853 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2854 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
2855
2856 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2857
2858 return sec;
2859 }
2860
2861 static asection *
2862 bfd_mach_o_read_section (bfd *abfd,
2863 unsigned int offset,
2864 unsigned long prot,
2865 unsigned int wide)
2866 {
2867 if (wide)
2868 return bfd_mach_o_read_section_64 (abfd, offset, prot);
2869 else
2870 return bfd_mach_o_read_section_32 (abfd, offset, prot);
2871 }
2872
2873 static bfd_boolean
2874 bfd_mach_o_read_symtab_symbol (bfd *abfd,
2875 bfd_mach_o_symtab_command *sym,
2876 bfd_mach_o_asymbol *s,
2877 unsigned long i)
2878 {
2879 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2880 unsigned int wide = mach_o_wide_p (&mdata->header);
2881 unsigned int symwidth =
2882 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2883 unsigned int symoff = sym->symoff + (i * symwidth);
2884 struct mach_o_nlist_64_external raw;
2885 unsigned char type = -1;
2886 unsigned char section = -1;
2887 short desc = -1;
2888 symvalue value = -1;
2889 unsigned long stroff = -1;
2890 unsigned int symtype = -1;
2891
2892 BFD_ASSERT (sym->strtab != NULL);
2893
2894 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
2895 || bfd_bread (&raw, symwidth, abfd) != symwidth)
2896 {
2897 (*_bfd_error_handler)
2898 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
2899 symwidth, (unsigned long) symoff);
2900 return FALSE;
2901 }
2902
2903 stroff = bfd_h_get_32 (abfd, raw.n_strx);
2904 type = bfd_h_get_8 (abfd, raw.n_type);
2905 symtype = type & BFD_MACH_O_N_TYPE;
2906 section = bfd_h_get_8 (abfd, raw.n_sect);
2907 desc = bfd_h_get_16 (abfd, raw.n_desc);
2908 if (wide)
2909 value = bfd_h_get_64 (abfd, raw.n_value);
2910 else
2911 value = bfd_h_get_32 (abfd, raw.n_value);
2912
2913 if (stroff >= sym->strsize)
2914 {
2915 (*_bfd_error_handler)
2916 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
2917 (unsigned long) stroff,
2918 (unsigned long) sym->strsize);
2919 return FALSE;
2920 }
2921
2922 s->symbol.the_bfd = abfd;
2923 s->symbol.name = sym->strtab + stroff;
2924 s->symbol.value = value;
2925 s->symbol.flags = 0x0;
2926 s->symbol.udata.i = i;
2927 s->n_type = type;
2928 s->n_sect = section;
2929 s->n_desc = desc;
2930
2931 if (type & BFD_MACH_O_N_STAB)
2932 {
2933 s->symbol.flags |= BSF_DEBUGGING;
2934 s->symbol.section = bfd_und_section_ptr;
2935 switch (type)
2936 {
2937 case N_FUN:
2938 case N_STSYM:
2939 case N_LCSYM:
2940 case N_BNSYM:
2941 case N_SLINE:
2942 case N_ENSYM:
2943 case N_ECOMM:
2944 case N_ECOML:
2945 case N_GSYM:
2946 if ((section > 0) && (section <= mdata->nsects))
2947 {
2948 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2949 s->symbol.value =
2950 s->symbol.value - mdata->sections[section - 1]->addr;
2951 }
2952 break;
2953 }
2954 }
2955 else
2956 {
2957 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
2958 s->symbol.flags |= BSF_GLOBAL;
2959 else
2960 s->symbol.flags |= BSF_LOCAL;
2961
2962 switch (symtype)
2963 {
2964 case BFD_MACH_O_N_UNDF:
2965 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
2966 && s->symbol.value != 0)
2967 {
2968 /* A common symbol. */
2969 s->symbol.section = bfd_com_section_ptr;
2970 s->symbol.flags = BSF_NO_FLAGS;
2971 }
2972 else
2973 {
2974 s->symbol.section = bfd_und_section_ptr;
2975 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
2976 s->symbol.flags |= BSF_WEAK;
2977 }
2978 break;
2979 case BFD_MACH_O_N_PBUD:
2980 s->symbol.section = bfd_und_section_ptr;
2981 break;
2982 case BFD_MACH_O_N_ABS:
2983 s->symbol.section = bfd_abs_section_ptr;
2984 break;
2985 case BFD_MACH_O_N_SECT:
2986 if ((section > 0) && (section <= mdata->nsects))
2987 {
2988 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2989 s->symbol.value =
2990 s->symbol.value - mdata->sections[section - 1]->addr;
2991 }
2992 else
2993 {
2994 /* Mach-O uses 0 to mean "no section"; not an error. */
2995 if (section != 0)
2996 {
2997 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
2998 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
2999 s->symbol.name, section, mdata->nsects);
3000 }
3001 s->symbol.section = bfd_und_section_ptr;
3002 }
3003 break;
3004 case BFD_MACH_O_N_INDR:
3005 /* FIXME: we don't follow the BFD convention as this indirect symbol
3006 won't be followed by the referenced one. This looks harmless
3007 unless we start using the linker. */
3008 s->symbol.flags |= BSF_INDIRECT;
3009 s->symbol.section = bfd_ind_section_ptr;
3010 s->symbol.value = 0;
3011 break;
3012 default:
3013 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3014 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3015 s->symbol.name, symtype);
3016 s->symbol.section = bfd_und_section_ptr;
3017 break;
3018 }
3019 }
3020
3021 return TRUE;
3022 }
3023
3024 bfd_boolean
3025 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3026 {
3027 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3028 bfd_mach_o_symtab_command *sym = mdata->symtab;
3029
3030 /* Fail if there is no symtab. */
3031 if (sym == NULL)
3032 return FALSE;
3033
3034 /* Success if already loaded. */
3035 if (sym->strtab)
3036 return TRUE;
3037
3038 if (abfd->flags & BFD_IN_MEMORY)
3039 {
3040 struct bfd_in_memory *b;
3041
3042 b = (struct bfd_in_memory *) abfd->iostream;
3043
3044 if ((sym->stroff + sym->strsize) > b->size)
3045 {
3046 bfd_set_error (bfd_error_file_truncated);
3047 return FALSE;
3048 }
3049 sym->strtab = (char *) b->buffer + sym->stroff;
3050 }
3051 else
3052 {
3053 sym->strtab = bfd_alloc (abfd, sym->strsize);
3054 if (sym->strtab == NULL)
3055 return FALSE;
3056
3057 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3058 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3059 {
3060 bfd_set_error (bfd_error_file_truncated);
3061 return FALSE;
3062 }
3063 }
3064
3065 return TRUE;
3066 }
3067
3068 bfd_boolean
3069 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3070 {
3071 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3072 bfd_mach_o_symtab_command *sym = mdata->symtab;
3073 unsigned long i;
3074
3075 if (sym == NULL || sym->symbols)
3076 {
3077 /* Return now if there are no symbols or if already loaded. */
3078 return TRUE;
3079 }
3080
3081 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3082
3083 if (sym->symbols == NULL)
3084 {
3085 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3086 return FALSE;
3087 }
3088
3089 if (!bfd_mach_o_read_symtab_strtab (abfd))
3090 return FALSE;
3091
3092 for (i = 0; i < sym->nsyms; i++)
3093 {
3094 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3095 return FALSE;
3096 }
3097
3098 return TRUE;
3099 }
3100
3101 static const char *
3102 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3103 {
3104 switch ((int) flavour)
3105 {
3106 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3107 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3108 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3109 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3110 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3111 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3112 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3113 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3114 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3115 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3116 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3117 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3118 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3119 default: return "UNKNOWN";
3120 }
3121 }
3122
3123 static const char *
3124 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3125 {
3126 switch ((int) flavour)
3127 {
3128 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3129 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3130 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3131 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3132 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3133 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3134 default: return "UNKNOWN";
3135 }
3136 }
3137
3138 static int
3139 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3140 {
3141 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3142 struct mach_o_str_command_external raw;
3143 unsigned int nameoff;
3144
3145 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER)
3146 || (command->type == BFD_MACH_O_LC_LOAD_DYLINKER));
3147
3148 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3149 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3150 return -1;
3151
3152 nameoff = bfd_h_get_32 (abfd, raw.str);
3153
3154 cmd->name_offset = command->offset + nameoff;
3155 cmd->name_len = command->len - nameoff;
3156 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3157 if (cmd->name_str == NULL)
3158 return -1;
3159 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3160 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3161 return -1;
3162 return 0;
3163 }
3164
3165 static int
3166 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3167 {
3168 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3169 struct mach_o_dylib_command_external raw;
3170 unsigned int nameoff;
3171
3172 switch (command->type)
3173 {
3174 case BFD_MACH_O_LC_LOAD_DYLIB:
3175 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3176 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3177 case BFD_MACH_O_LC_ID_DYLIB:
3178 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3179 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3180 break;
3181 default:
3182 BFD_FAIL ();
3183 return -1;
3184 }
3185
3186 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3187 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3188 return -1;
3189
3190 nameoff = bfd_h_get_32 (abfd, raw.name);
3191 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3192 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3193 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3194
3195 cmd->name_offset = command->offset + nameoff;
3196 cmd->name_len = command->len - nameoff;
3197 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3198 if (cmd->name_str == NULL)
3199 return -1;
3200 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3201 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3202 return -1;
3203 return 0;
3204 }
3205
3206 static int
3207 bfd_mach_o_read_prebound_dylib (bfd *abfd ATTRIBUTE_UNUSED,
3208 bfd_mach_o_load_command *command ATTRIBUTE_UNUSED)
3209 {
3210 /* bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; */
3211
3212 BFD_ASSERT (command->type == BFD_MACH_O_LC_PREBOUND_DYLIB);
3213 return 0;
3214 }
3215
3216 static int
3217 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3218 {
3219 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3220 struct mach_o_fvmlib_command_external raw;
3221 unsigned int nameoff;
3222
3223 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3224 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3225 return -1;
3226
3227 nameoff = bfd_h_get_32 (abfd, raw.name);
3228 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3229 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3230
3231 fvm->name_offset = command->offset + nameoff;
3232 fvm->name_len = command->len - nameoff;
3233 fvm->name_str = bfd_alloc (abfd, fvm->name_len);
3234 if (fvm->name_str == NULL)
3235 return -1;
3236 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3237 || bfd_bread (fvm->name_str, fvm->name_len, abfd) != fvm->name_len)
3238 return -1;
3239 return 0;
3240 }
3241
3242 static int
3243 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3244 {
3245 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3246 bfd_mach_o_thread_command *cmd = &command->command.thread;
3247 unsigned int offset;
3248 unsigned int nflavours;
3249 unsigned int i;
3250
3251 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3252 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3253
3254 /* Count the number of threads. */
3255 offset = 8;
3256 nflavours = 0;
3257 while (offset != command->len)
3258 {
3259 struct mach_o_thread_command_external raw;
3260
3261 if (offset >= command->len)
3262 return -1;
3263
3264 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3265 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3266 return -1;
3267
3268 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3269 nflavours++;
3270 }
3271
3272 /* Allocate threads. */
3273 cmd->flavours = bfd_alloc
3274 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3275 if (cmd->flavours == NULL)
3276 return -1;
3277 cmd->nflavours = nflavours;
3278
3279 offset = 8;
3280 nflavours = 0;
3281 while (offset != command->len)
3282 {
3283 struct mach_o_thread_command_external raw;
3284
3285 if (offset >= command->len)
3286 return -1;
3287
3288 if (nflavours >= cmd->nflavours)
3289 return -1;
3290
3291 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3292 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3293 return -1;
3294
3295 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3296 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3297 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3298 offset += cmd->flavours[nflavours].size + sizeof (raw);
3299 nflavours++;
3300 }
3301
3302 for (i = 0; i < nflavours; i++)
3303 {
3304 asection *bfdsec;
3305 unsigned int snamelen;
3306 char *sname;
3307 const char *flavourstr;
3308 const char *prefix = "LC_THREAD";
3309 unsigned int j = 0;
3310
3311 switch (mdata->header.cputype)
3312 {
3313 case BFD_MACH_O_CPU_TYPE_POWERPC:
3314 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3315 flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3316 break;
3317 case BFD_MACH_O_CPU_TYPE_I386:
3318 case BFD_MACH_O_CPU_TYPE_X86_64:
3319 flavourstr = bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3320 break;
3321 default:
3322 flavourstr = "UNKNOWN_ARCHITECTURE";
3323 break;
3324 }
3325
3326 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3327 sname = bfd_alloc (abfd, snamelen);
3328 if (sname == NULL)
3329 return -1;
3330
3331 for (;;)
3332 {
3333 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3334 if (bfd_get_section_by_name (abfd, sname) == NULL)
3335 break;
3336 j++;
3337 }
3338
3339 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
3340
3341 bfdsec->vma = 0;
3342 bfdsec->lma = 0;
3343 bfdsec->size = cmd->flavours[i].size;
3344 bfdsec->filepos = cmd->flavours[i].offset;
3345 bfdsec->alignment_power = 0x0;
3346
3347 cmd->section = bfdsec;
3348 }
3349
3350 return 0;
3351 }
3352
3353 static int
3354 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
3355 {
3356 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
3357 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3358
3359 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
3360
3361 {
3362 struct mach_o_dysymtab_command_external raw;
3363
3364 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3365 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3366 return -1;
3367
3368 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
3369 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
3370 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
3371 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
3372 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
3373 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
3374 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
3375 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
3376 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
3377 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
3378 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
3379 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
3380 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
3381 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
3382 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
3383 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
3384 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
3385 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
3386 }
3387
3388 if (cmd->nmodtab != 0)
3389 {
3390 unsigned int i;
3391 int wide = bfd_mach_o_wide_p (abfd);
3392 unsigned int module_len = wide ? 56 : 52;
3393
3394 cmd->dylib_module =
3395 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
3396 if (cmd->dylib_module == NULL)
3397 return -1;
3398
3399 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
3400 return -1;
3401
3402 for (i = 0; i < cmd->nmodtab; i++)
3403 {
3404 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
3405 unsigned long v;
3406 unsigned char buf[56];
3407
3408 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
3409 return -1;
3410
3411 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
3412 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
3413 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
3414 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
3415 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
3416 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
3417 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
3418 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
3419 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
3420 v = bfd_h_get_32 (abfd, buf +36);
3421 module->iinit = v & 0xffff;
3422 module->iterm = (v >> 16) & 0xffff;
3423 v = bfd_h_get_32 (abfd, buf + 40);
3424 module->ninit = v & 0xffff;
3425 module->nterm = (v >> 16) & 0xffff;
3426 if (wide)
3427 {
3428 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
3429 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
3430 }
3431 else
3432 {
3433 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
3434 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
3435 }
3436 }
3437 }
3438
3439 if (cmd->ntoc != 0)
3440 {
3441 unsigned int i;
3442
3443 cmd->dylib_toc = bfd_alloc
3444 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
3445 if (cmd->dylib_toc == NULL)
3446 return -1;
3447
3448 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
3449 return -1;
3450
3451 for (i = 0; i < cmd->ntoc; i++)
3452 {
3453 struct mach_o_dylib_table_of_contents_external raw;
3454 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
3455
3456 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3457 return -1;
3458
3459 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
3460 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
3461 }
3462 }
3463
3464 if (cmd->nindirectsyms != 0)
3465 {
3466 unsigned int i;
3467
3468 cmd->indirect_syms = bfd_alloc
3469 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
3470 if (cmd->indirect_syms == NULL)
3471 return -1;
3472
3473 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
3474 return -1;
3475
3476 for (i = 0; i < cmd->nindirectsyms; i++)
3477 {
3478 unsigned char raw[4];
3479 unsigned int *is = &cmd->indirect_syms[i];
3480
3481 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3482 return -1;
3483
3484 *is = bfd_h_get_32 (abfd, raw);
3485 }
3486 }
3487
3488 if (cmd->nextrefsyms != 0)
3489 {
3490 unsigned long v;
3491 unsigned int i;
3492
3493 cmd->ext_refs = bfd_alloc
3494 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
3495 if (cmd->ext_refs == NULL)
3496 return -1;
3497
3498 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
3499 return -1;
3500
3501 for (i = 0; i < cmd->nextrefsyms; i++)
3502 {
3503 unsigned char raw[4];
3504 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
3505
3506 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3507 return -1;
3508
3509 /* Fields isym and flags are written as bit-fields, thus we need
3510 a specific processing for endianness. */
3511 v = bfd_h_get_32 (abfd, raw);
3512 if (bfd_big_endian (abfd))
3513 {
3514 ref->isym = (v >> 8) & 0xffffff;
3515 ref->flags = v & 0xff;
3516 }
3517 else
3518 {
3519 ref->isym = v & 0xffffff;
3520 ref->flags = (v >> 24) & 0xff;
3521 }
3522 }
3523 }
3524
3525 if (mdata->dysymtab)
3526 return -1;
3527 mdata->dysymtab = cmd;
3528
3529 return 0;
3530 }
3531
3532 static int
3533 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
3534 {
3535 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
3536 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3537 struct mach_o_symtab_command_external raw;
3538
3539 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
3540
3541 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3542 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3543 return -1;
3544
3545 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
3546 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
3547 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
3548 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
3549 symtab->symbols = NULL;
3550 symtab->strtab = NULL;
3551
3552 if (symtab->nsyms != 0)
3553 abfd->flags |= HAS_SYMS;
3554
3555 if (mdata->symtab)
3556 return -1;
3557 mdata->symtab = symtab;
3558 return 0;
3559 }
3560
3561 static int
3562 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
3563 {
3564 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
3565
3566 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
3567
3568 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3569 || bfd_bread (cmd->uuid, 16, abfd) != 16)
3570 return -1;
3571
3572 return 0;
3573 }
3574
3575 static int
3576 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
3577 {
3578 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
3579 struct mach_o_linkedit_data_command_external raw;
3580
3581 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3582 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3583 return -1;
3584
3585 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
3586 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
3587 return 0;
3588 }
3589
3590 static int
3591 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
3592 {
3593 bfd_mach_o_str_command *cmd = &command->command.str;
3594 struct mach_o_str_command_external raw;
3595 unsigned long off;
3596
3597 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3598 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3599 return -1;
3600
3601 off = bfd_get_32 (abfd, raw.str);
3602 cmd->stroff = command->offset + off;
3603 cmd->str_len = command->len - off;
3604 cmd->str = bfd_alloc (abfd, cmd->str_len);
3605 if (cmd->str == NULL)
3606 return -1;
3607 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
3608 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
3609 return -1;
3610 return 0;
3611 }
3612
3613 static int
3614 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
3615 {
3616 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
3617 struct mach_o_dyld_info_command_external raw;
3618
3619 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3620 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3621 return -1;
3622
3623 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
3624 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
3625 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
3626 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
3627 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
3628 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
3629 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
3630 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
3631 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
3632 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
3633 return 0;
3634 }
3635
3636 static bfd_boolean
3637 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
3638 {
3639 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
3640 struct mach_o_version_min_command_external raw;
3641 unsigned int ver;
3642
3643 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3644 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3645 return FALSE;
3646
3647 ver = bfd_get_32 (abfd, raw.version);
3648 cmd->rel = ver >> 16;
3649 cmd->maj = ver >> 8;
3650 cmd->min = ver;
3651 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
3652 return TRUE;
3653 }
3654
3655 static bfd_boolean
3656 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
3657 {
3658 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
3659 struct mach_o_encryption_info_command_external raw;
3660
3661 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3662 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3663 return FALSE;
3664
3665 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
3666 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
3667 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
3668 return TRUE;
3669 }
3670
3671 static bfd_boolean
3672 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
3673 {
3674 bfd_mach_o_main_command *cmd = &command->command.main;
3675 struct mach_o_entry_point_command_external raw;
3676
3677 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3678 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3679 return FALSE;
3680
3681 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
3682 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
3683 return TRUE;
3684 }
3685
3686 static bfd_boolean
3687 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
3688 {
3689 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
3690 struct mach_o_source_version_command_external raw;
3691 bfd_uint64_t ver;
3692
3693 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3694 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3695 return FALSE;
3696
3697 ver = bfd_get_64 (abfd, raw.version);
3698 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
3699 generates warnings) in case of the host doesn't support 64 bit
3700 integers. */
3701 cmd->e = ver & 0x3ff;
3702 ver >>= 10;
3703 cmd->d = ver & 0x3ff;
3704 ver >>= 10;
3705 cmd->c = ver & 0x3ff;
3706 ver >>= 10;
3707 cmd->b = ver & 0x3ff;
3708 ver >>= 10;
3709 cmd->a = ver & 0xffffff;
3710 return TRUE;
3711 }
3712
3713 static int
3714 bfd_mach_o_read_segment (bfd *abfd,
3715 bfd_mach_o_load_command *command,
3716 unsigned int wide)
3717 {
3718 bfd_mach_o_segment_command *seg = &command->command.segment;
3719 unsigned long i;
3720
3721 if (wide)
3722 {
3723 struct mach_o_segment_command_64_external raw;
3724
3725 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
3726
3727 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3728 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3729 return -1;
3730
3731 memcpy (seg->segname, raw.segname, 16);
3732 seg->segname[16] = '\0';
3733
3734 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
3735 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
3736 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
3737 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
3738 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3739 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3740 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3741 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3742 }
3743 else
3744 {
3745 struct mach_o_segment_command_32_external raw;
3746
3747 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
3748
3749 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3750 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3751 return -1;
3752
3753 memcpy (seg->segname, raw.segname, 16);
3754 seg->segname[16] = '\0';
3755
3756 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
3757 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
3758 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
3759 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
3760 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3761 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3762 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3763 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3764 }
3765 seg->sect_head = NULL;
3766 seg->sect_tail = NULL;
3767
3768 for (i = 0; i < seg->nsects; i++)
3769 {
3770 bfd_vma segoff;
3771 asection *sec;
3772
3773 if (wide)
3774 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
3775 + (i * BFD_MACH_O_SECTION_64_SIZE);
3776 else
3777 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
3778 + (i * BFD_MACH_O_SECTION_SIZE);
3779
3780 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
3781 if (sec == NULL)
3782 return -1;
3783
3784 bfd_mach_o_append_section_to_segment (seg, sec);
3785 }
3786
3787 return 0;
3788 }
3789
3790 static int
3791 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
3792 {
3793 return bfd_mach_o_read_segment (abfd, command, 0);
3794 }
3795
3796 static int
3797 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
3798 {
3799 return bfd_mach_o_read_segment (abfd, command, 1);
3800 }
3801
3802 static int
3803 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
3804 {
3805 struct mach_o_load_command_external raw;
3806 unsigned int cmd;
3807
3808 /* Read command type and length. */
3809 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
3810 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
3811 return -1;
3812
3813 cmd = bfd_h_get_32 (abfd, raw.cmd);
3814 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
3815 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
3816 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
3817
3818 switch (command->type)
3819 {
3820 case BFD_MACH_O_LC_SEGMENT:
3821 if (bfd_mach_o_read_segment_32 (abfd, command) != 0)
3822 return -1;
3823 break;
3824 case BFD_MACH_O_LC_SEGMENT_64:
3825 if (bfd_mach_o_read_segment_64 (abfd, command) != 0)
3826 return -1;
3827 break;
3828 case BFD_MACH_O_LC_SYMTAB:
3829 if (bfd_mach_o_read_symtab (abfd, command) != 0)
3830 return -1;
3831 break;
3832 case BFD_MACH_O_LC_SYMSEG:
3833 break;
3834 case BFD_MACH_O_LC_THREAD:
3835 case BFD_MACH_O_LC_UNIXTHREAD:
3836 if (bfd_mach_o_read_thread (abfd, command) != 0)
3837 return -1;
3838 break;
3839 case BFD_MACH_O_LC_LOAD_DYLINKER:
3840 case BFD_MACH_O_LC_ID_DYLINKER:
3841 if (bfd_mach_o_read_dylinker (abfd, command) != 0)
3842 return -1;
3843 break;
3844 case BFD_MACH_O_LC_LOAD_DYLIB:
3845 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3846 case BFD_MACH_O_LC_ID_DYLIB:
3847 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3848 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3849 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3850 if (bfd_mach_o_read_dylib (abfd, command) != 0)
3851 return -1;
3852 break;
3853 case BFD_MACH_O_LC_PREBOUND_DYLIB:
3854 if (bfd_mach_o_read_prebound_dylib (abfd, command) != 0)
3855 return -1;
3856 break;
3857 case BFD_MACH_O_LC_LOADFVMLIB:
3858 case BFD_MACH_O_LC_IDFVMLIB:
3859 if (bfd_mach_o_read_fvmlib (abfd, command) != 0)
3860 return -1;
3861 break;
3862 case BFD_MACH_O_LC_IDENT:
3863 case BFD_MACH_O_LC_FVMFILE:
3864 case BFD_MACH_O_LC_PREPAGE:
3865 case BFD_MACH_O_LC_ROUTINES:
3866 case BFD_MACH_O_LC_ROUTINES_64:
3867 break;
3868 case BFD_MACH_O_LC_SUB_FRAMEWORK:
3869 case BFD_MACH_O_LC_SUB_UMBRELLA:
3870 case BFD_MACH_O_LC_SUB_LIBRARY:
3871 case BFD_MACH_O_LC_SUB_CLIENT:
3872 case BFD_MACH_O_LC_RPATH:
3873 if (bfd_mach_o_read_str (abfd, command) != 0)
3874 return -1;
3875 break;
3876 case BFD_MACH_O_LC_DYSYMTAB:
3877 if (bfd_mach_o_read_dysymtab (abfd, command) != 0)
3878 return -1;
3879 break;
3880 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
3881 case BFD_MACH_O_LC_PREBIND_CKSUM:
3882 break;
3883 case BFD_MACH_O_LC_UUID:
3884 if (bfd_mach_o_read_uuid (abfd, command) != 0)
3885 return -1;
3886 break;
3887 case BFD_MACH_O_LC_CODE_SIGNATURE:
3888 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
3889 case BFD_MACH_O_LC_FUNCTION_STARTS:
3890 case BFD_MACH_O_LC_DATA_IN_CODE:
3891 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
3892 if (bfd_mach_o_read_linkedit (abfd, command) != 0)
3893 return -1;
3894 break;
3895 case BFD_MACH_O_LC_ENCRYPTION_INFO:
3896 if (!bfd_mach_o_read_encryption_info (abfd, command))
3897 return -1;
3898 break;
3899 case BFD_MACH_O_LC_DYLD_INFO:
3900 if (bfd_mach_o_read_dyld_info (abfd, command) != 0)
3901 return -1;
3902 break;
3903 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
3904 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
3905 if (!bfd_mach_o_read_version_min (abfd, command))
3906 return -1;
3907 break;
3908 case BFD_MACH_O_LC_MAIN:
3909 if (!bfd_mach_o_read_main (abfd, command))
3910 return -1;
3911 break;
3912 case BFD_MACH_O_LC_SOURCE_VERSION:
3913 if (!bfd_mach_o_read_source_version (abfd, command))
3914 return -1;
3915 break;
3916 default:
3917 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
3918 abfd, (unsigned long) command->type);
3919 break;
3920 }
3921
3922 return 0;
3923 }
3924
3925 static void
3926 bfd_mach_o_flatten_sections (bfd *abfd)
3927 {
3928 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3929 long csect = 0;
3930 unsigned long i;
3931
3932 /* Count total number of sections. */
3933 mdata->nsects = 0;
3934
3935 for (i = 0; i < mdata->header.ncmds; i++)
3936 {
3937 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
3938 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
3939 {
3940 bfd_mach_o_segment_command *seg;
3941
3942 seg = &mdata->commands[i].command.segment;
3943 mdata->nsects += seg->nsects;
3944 }
3945 }
3946
3947 /* Allocate sections array. */
3948 mdata->sections = bfd_alloc (abfd,
3949 mdata->nsects * sizeof (bfd_mach_o_section *));
3950
3951 /* Fill the array. */
3952 csect = 0;
3953
3954 for (i = 0; i < mdata->header.ncmds; i++)
3955 {
3956 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
3957 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
3958 {
3959 bfd_mach_o_segment_command *seg;
3960 bfd_mach_o_section *sec;
3961
3962 seg = &mdata->commands[i].command.segment;
3963 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
3964
3965 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
3966 mdata->sections[csect++] = sec;
3967 }
3968 }
3969 }
3970
3971 static bfd_boolean
3972 bfd_mach_o_scan_start_address (bfd *abfd)
3973 {
3974 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3975 bfd_mach_o_thread_command *cmd = NULL;
3976 unsigned long i;
3977
3978 for (i = 0; i < mdata->header.ncmds; i++)
3979 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
3980 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
3981 {
3982 cmd = &mdata->commands[i].command.thread;
3983 break;
3984 }
3985 else if (mdata->commands[i].type == BFD_MACH_O_LC_MAIN
3986 && mdata->nsects > 1)
3987 {
3988 bfd_mach_o_main_command *main_cmd = &mdata->commands[i].command.main;
3989 bfd_mach_o_section *text_sect = mdata->sections[0];
3990 if (text_sect)
3991 {
3992 abfd->start_address = main_cmd->entryoff
3993 + (text_sect->addr - text_sect->offset);
3994 return TRUE;
3995 }
3996 }
3997
3998 /* An object file has no start address, so do not fail if not found. */
3999 if (cmd == NULL)
4000 return TRUE;
4001
4002 /* FIXME: create a subtarget hook ? */
4003 for (i = 0; i < cmd->nflavours; i++)
4004 {
4005 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4006 && (cmd->flavours[i].flavour
4007 == (unsigned long) BFD_MACH_O_x86_THREAD_STATE32))
4008 {
4009 unsigned char buf[4];
4010
4011 if (bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET) != 0
4012 || bfd_bread (buf, 4, abfd) != 4)
4013 return FALSE;
4014
4015 abfd->start_address = bfd_h_get_32 (abfd, buf);
4016 }
4017 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4018 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4019 {
4020 unsigned char buf[4];
4021
4022 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
4023 || bfd_bread (buf, 4, abfd) != 4)
4024 return FALSE;
4025
4026 abfd->start_address = bfd_h_get_32 (abfd, buf);
4027 }
4028 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4029 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4030 {
4031 unsigned char buf[8];
4032
4033 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
4034 || bfd_bread (buf, 8, abfd) != 8)
4035 return FALSE;
4036
4037 abfd->start_address = bfd_h_get_64 (abfd, buf);
4038 }
4039 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4040 && (cmd->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4041 {
4042 unsigned char buf[8];
4043
4044 if (bfd_seek (abfd, cmd->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4045 || bfd_bread (buf, 8, abfd) != 8)
4046 return FALSE;
4047
4048 abfd->start_address = bfd_h_get_64 (abfd, buf);
4049 }
4050 }
4051
4052 return TRUE;
4053 }
4054
4055 bfd_boolean
4056 bfd_mach_o_set_arch_mach (bfd *abfd,
4057 enum bfd_architecture arch,
4058 unsigned long machine)
4059 {
4060 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4061
4062 /* If this isn't the right architecture for this backend, and this
4063 isn't the generic backend, fail. */
4064 if (arch != bed->arch
4065 && arch != bfd_arch_unknown
4066 && bed->arch != bfd_arch_unknown)
4067 return FALSE;
4068
4069 return bfd_default_set_arch_mach (abfd, arch, machine);
4070 }
4071
4072 static bfd_boolean
4073 bfd_mach_o_scan (bfd *abfd,
4074 bfd_mach_o_header *header,
4075 bfd_mach_o_data_struct *mdata)
4076 {
4077 unsigned int i;
4078 enum bfd_architecture cputype;
4079 unsigned long cpusubtype;
4080 unsigned int hdrsize;
4081
4082 hdrsize = mach_o_wide_p (header) ?
4083 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4084
4085 mdata->header = *header;
4086
4087 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4088 switch (header->filetype)
4089 {
4090 case BFD_MACH_O_MH_OBJECT:
4091 abfd->flags |= HAS_RELOC;
4092 break;
4093 case BFD_MACH_O_MH_EXECUTE:
4094 abfd->flags |= EXEC_P;
4095 break;
4096 case BFD_MACH_O_MH_DYLIB:
4097 case BFD_MACH_O_MH_BUNDLE:
4098 abfd->flags |= DYNAMIC;
4099 break;
4100 }
4101
4102 abfd->tdata.mach_o_data = mdata;
4103
4104 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4105 &cputype, &cpusubtype);
4106 if (cputype == bfd_arch_unknown)
4107 {
4108 (*_bfd_error_handler)
4109 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4110 header->cputype, header->cpusubtype);
4111 return FALSE;
4112 }
4113
4114 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4115
4116 if (header->ncmds != 0)
4117 {
4118 mdata->commands = bfd_alloc
4119 (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4120 if (mdata->commands == NULL)
4121 return FALSE;
4122
4123 for (i = 0; i < header->ncmds; i++)
4124 {
4125 bfd_mach_o_load_command *cur = &mdata->commands[i];
4126
4127 if (i == 0)
4128 cur->offset = hdrsize;
4129 else
4130 {
4131 bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
4132 cur->offset = prev->offset + prev->len;
4133 }
4134
4135 if (bfd_mach_o_read_command (abfd, cur) < 0)
4136 return FALSE;
4137 }
4138 }
4139
4140 /* Sections should be flatten before scanning start address. */
4141 bfd_mach_o_flatten_sections (abfd);
4142 if (!bfd_mach_o_scan_start_address (abfd))
4143 return FALSE;
4144
4145 return TRUE;
4146 }
4147
4148 bfd_boolean
4149 bfd_mach_o_mkobject_init (bfd *abfd)
4150 {
4151 bfd_mach_o_data_struct *mdata = NULL;
4152
4153 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4154 if (mdata == NULL)
4155 return FALSE;
4156 abfd->tdata.mach_o_data = mdata;
4157
4158 mdata->header.magic = 0;
4159 mdata->header.cputype = 0;
4160 mdata->header.cpusubtype = 0;
4161 mdata->header.filetype = 0;
4162 mdata->header.ncmds = 0;
4163 mdata->header.sizeofcmds = 0;
4164 mdata->header.flags = 0;
4165 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4166 mdata->commands = NULL;
4167 mdata->nsects = 0;
4168 mdata->sections = NULL;
4169 mdata->dyn_reloc_cache = NULL;
4170
4171 return TRUE;
4172 }
4173
4174 static bfd_boolean
4175 bfd_mach_o_gen_mkobject (bfd *abfd)
4176 {
4177 bfd_mach_o_data_struct *mdata;
4178
4179 if (!bfd_mach_o_mkobject_init (abfd))
4180 return FALSE;
4181
4182 mdata = bfd_mach_o_get_data (abfd);
4183 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4184 mdata->header.cputype = 0;
4185 mdata->header.cpusubtype = 0;
4186 mdata->header.byteorder = abfd->xvec->byteorder;
4187 mdata->header.version = 1;
4188
4189 return TRUE;
4190 }
4191
4192 const bfd_target *
4193 bfd_mach_o_header_p (bfd *abfd,
4194 bfd_mach_o_filetype filetype,
4195 bfd_mach_o_cpu_type cputype)
4196 {
4197 bfd_mach_o_header header;
4198 bfd_mach_o_data_struct *mdata;
4199
4200 if (!bfd_mach_o_read_header (abfd, &header))
4201 goto wrong;
4202
4203 if (! (header.byteorder == BFD_ENDIAN_BIG
4204 || header.byteorder == BFD_ENDIAN_LITTLE))
4205 {
4206 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4207 (unsigned long) header.byteorder);
4208 goto wrong;
4209 }
4210
4211 if (! ((header.byteorder == BFD_ENDIAN_BIG
4212 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4213 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4214 || (header.byteorder == BFD_ENDIAN_LITTLE
4215 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4216 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4217 goto wrong;
4218
4219 /* Check cputype and filetype.
4220 In case of wildcard, do not accept magics that are handled by existing
4221 targets. */
4222 if (cputype)
4223 {
4224 if (header.cputype != cputype)
4225 goto wrong;
4226 }
4227
4228 if (filetype)
4229 {
4230 if (header.filetype != filetype)
4231 goto wrong;
4232 }
4233 else
4234 {
4235 switch (header.filetype)
4236 {
4237 case BFD_MACH_O_MH_CORE:
4238 /* Handled by core_p */
4239 goto wrong;
4240 default:
4241 break;
4242 }
4243 }
4244
4245 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
4246 if (mdata == NULL)
4247 goto fail;
4248
4249 if (!bfd_mach_o_scan (abfd, &header, mdata))
4250 goto wrong;
4251
4252 return abfd->xvec;
4253
4254 wrong:
4255 bfd_set_error (bfd_error_wrong_format);
4256
4257 fail:
4258 return NULL;
4259 }
4260
4261 static const bfd_target *
4262 bfd_mach_o_gen_object_p (bfd *abfd)
4263 {
4264 return bfd_mach_o_header_p (abfd, 0, 0);
4265 }
4266
4267 static const bfd_target *
4268 bfd_mach_o_gen_core_p (bfd *abfd)
4269 {
4270 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
4271 }
4272
4273 typedef struct mach_o_fat_archentry
4274 {
4275 unsigned long cputype;
4276 unsigned long cpusubtype;
4277 unsigned long offset;
4278 unsigned long size;
4279 unsigned long align;
4280 } mach_o_fat_archentry;
4281
4282 typedef struct mach_o_fat_data_struct
4283 {
4284 unsigned long magic;
4285 unsigned long nfat_arch;
4286 mach_o_fat_archentry *archentries;
4287 } mach_o_fat_data_struct;
4288
4289 const bfd_target *
4290 bfd_mach_o_archive_p (bfd *abfd)
4291 {
4292 mach_o_fat_data_struct *adata = NULL;
4293 struct mach_o_fat_header_external hdr;
4294 unsigned long i;
4295
4296 if (bfd_seek (abfd, 0, SEEK_SET) != 0
4297 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
4298 goto error;
4299
4300 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
4301 if (adata == NULL)
4302 goto error;
4303
4304 adata->magic = bfd_getb32 (hdr.magic);
4305 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
4306 if (adata->magic != 0xcafebabe)
4307 goto error;
4308 /* Avoid matching Java bytecode files, which have the same magic number.
4309 In the Java bytecode file format this field contains the JVM version,
4310 which starts at 43.0. */
4311 if (adata->nfat_arch > 30)
4312 goto error;
4313
4314 adata->archentries =
4315 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
4316 if (adata->archentries == NULL)
4317 goto error;
4318
4319 for (i = 0; i < adata->nfat_arch; i++)
4320 {
4321 struct mach_o_fat_arch_external arch;
4322 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
4323 goto error;
4324 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
4325 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
4326 adata->archentries[i].offset = bfd_getb32 (arch.offset);
4327 adata->archentries[i].size = bfd_getb32 (arch.size);
4328 adata->archentries[i].align = bfd_getb32 (arch.align);
4329 }
4330
4331 abfd->tdata.mach_o_fat_data = adata;
4332 return abfd->xvec;
4333
4334 error:
4335 if (adata != NULL)
4336 bfd_release (abfd, adata);
4337 bfd_set_error (bfd_error_wrong_format);
4338 return NULL;
4339 }
4340
4341 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
4342 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
4343 Set arelt_data and origin fields too. */
4344
4345 static void
4346 bfd_mach_o_fat_member_init (bfd *abfd,
4347 enum bfd_architecture arch_type,
4348 unsigned long arch_subtype,
4349 mach_o_fat_archentry *entry)
4350 {
4351 struct areltdata *areltdata;
4352 /* Create the member filename. Use ARCH_NAME. */
4353 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
4354
4355 if (ap)
4356 {
4357 /* Use the architecture name if known. */
4358 abfd->filename = xstrdup (ap->printable_name);
4359 }
4360 else
4361 {
4362 /* Forge a uniq id. */
4363 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
4364 char *name = xmalloc (namelen);
4365 snprintf (name, namelen, "0x%lx-0x%lx",
4366 entry->cputype, entry->cpusubtype);
4367 abfd->filename = name;
4368 }
4369
4370 areltdata = bfd_zmalloc (sizeof (struct areltdata));
4371 areltdata->parsed_size = entry->size;
4372 abfd->arelt_data = areltdata;
4373 abfd->iostream = NULL;
4374 abfd->origin = entry->offset;
4375 }
4376
4377 bfd *
4378 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
4379 {
4380 mach_o_fat_data_struct *adata;
4381 mach_o_fat_archentry *entry = NULL;
4382 unsigned long i;
4383 bfd *nbfd;
4384 enum bfd_architecture arch_type;
4385 unsigned long arch_subtype;
4386
4387 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
4388 BFD_ASSERT (adata != NULL);
4389
4390 /* Find index of previous entry. */
4391 if (prev == NULL)
4392 {
4393 /* Start at first one. */
4394 i = 0;
4395 }
4396 else
4397 {
4398 /* Find index of PREV. */
4399 for (i = 0; i < adata->nfat_arch; i++)
4400 {
4401 if (adata->archentries[i].offset == prev->origin)
4402 break;
4403 }
4404
4405 if (i == adata->nfat_arch)
4406 {
4407 /* Not found. */
4408 bfd_set_error (bfd_error_bad_value);
4409 return NULL;
4410 }
4411
4412 /* Get next entry. */
4413 i++;
4414 }
4415
4416 if (i >= adata->nfat_arch)
4417 {
4418 bfd_set_error (bfd_error_no_more_archived_files);
4419 return NULL;
4420 }
4421
4422 entry = &adata->archentries[i];
4423 nbfd = _bfd_new_bfd_contained_in (archive);
4424 if (nbfd == NULL)
4425 return NULL;
4426
4427 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
4428 &arch_type, &arch_subtype);
4429
4430 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
4431
4432 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
4433
4434 return nbfd;
4435 }
4436
4437 /* Analogous to stat call. */
4438
4439 static int
4440 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
4441 {
4442 if (abfd->arelt_data == NULL)
4443 {
4444 bfd_set_error (bfd_error_invalid_operation);
4445 return -1;
4446 }
4447
4448 buf->st_mtime = 0;
4449 buf->st_uid = 0;
4450 buf->st_gid = 0;
4451 buf->st_mode = 0644;
4452 buf->st_size = arelt_size (abfd);
4453
4454 return 0;
4455 }
4456
4457 /* If ABFD format is FORMAT and architecture is ARCH, return it.
4458 If ABFD is a fat image containing a member that corresponds to FORMAT
4459 and ARCH, returns it.
4460 In other case, returns NULL.
4461 This function allows transparent uses of fat images. */
4462
4463 bfd *
4464 bfd_mach_o_fat_extract (bfd *abfd,
4465 bfd_format format,
4466 const bfd_arch_info_type *arch)
4467 {
4468 bfd *res;
4469 mach_o_fat_data_struct *adata;
4470 unsigned int i;
4471
4472 if (bfd_check_format (abfd, format))
4473 {
4474 if (bfd_get_arch_info (abfd) == arch)
4475 return abfd;
4476 return NULL;
4477 }
4478 if (!bfd_check_format (abfd, bfd_archive)
4479 || abfd->xvec != &mach_o_fat_vec)
4480 return NULL;
4481
4482 /* This is a Mach-O fat image. */
4483 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
4484 BFD_ASSERT (adata != NULL);
4485
4486 for (i = 0; i < adata->nfat_arch; i++)
4487 {
4488 struct mach_o_fat_archentry *e = &adata->archentries[i];
4489 enum bfd_architecture cpu_type;
4490 unsigned long cpu_subtype;
4491
4492 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
4493 &cpu_type, &cpu_subtype);
4494 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
4495 continue;
4496
4497 /* The architecture is found. */
4498 res = _bfd_new_bfd_contained_in (abfd);
4499 if (res == NULL)
4500 return NULL;
4501
4502 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
4503
4504 if (bfd_check_format (res, format))
4505 {
4506 BFD_ASSERT (bfd_get_arch_info (res) == arch);
4507 return res;
4508 }
4509 bfd_close (res);
4510 return NULL;
4511 }
4512
4513 return NULL;
4514 }
4515
4516 int
4517 bfd_mach_o_lookup_command (bfd *abfd,
4518 bfd_mach_o_load_command_type type,
4519 bfd_mach_o_load_command **mcommand)
4520 {
4521 struct mach_o_data_struct *md = bfd_mach_o_get_data (abfd);
4522 bfd_mach_o_load_command *ncmd = NULL;
4523 unsigned int i, num;
4524
4525 BFD_ASSERT (md != NULL);
4526 BFD_ASSERT (mcommand != NULL);
4527
4528 num = 0;
4529 for (i = 0; i < md->header.ncmds; i++)
4530 {
4531 struct bfd_mach_o_load_command *cmd = &md->commands[i];
4532
4533 if (cmd->type != type)
4534 continue;
4535
4536 if (num == 0)
4537 ncmd = cmd;
4538 num++;
4539 }
4540
4541 *mcommand = ncmd;
4542 return num;
4543 }
4544
4545 unsigned long
4546 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
4547 {
4548 switch (type)
4549 {
4550 case BFD_MACH_O_CPU_TYPE_MC680x0:
4551 return 0x04000000;
4552 case BFD_MACH_O_CPU_TYPE_MC88000:
4553 return 0xffffe000;
4554 case BFD_MACH_O_CPU_TYPE_POWERPC:
4555 return 0xc0000000;
4556 case BFD_MACH_O_CPU_TYPE_I386:
4557 return 0xc0000000;
4558 case BFD_MACH_O_CPU_TYPE_SPARC:
4559 return 0xf0000000;
4560 case BFD_MACH_O_CPU_TYPE_I860:
4561 return 0;
4562 case BFD_MACH_O_CPU_TYPE_HPPA:
4563 return 0xc0000000 - 0x04000000;
4564 default:
4565 return 0;
4566 }
4567 }
4568
4569 /* The following two tables should be kept, as far as possible, in order of
4570 most frequently used entries to optimize their use from gas. */
4571
4572 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
4573 {
4574 { "regular", BFD_MACH_O_S_REGULAR},
4575 { "coalesced", BFD_MACH_O_S_COALESCED},
4576 { "zerofill", BFD_MACH_O_S_ZEROFILL},
4577 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
4578 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
4579 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
4580 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
4581 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
4582 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
4583 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
4584 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
4585 { "interposing", BFD_MACH_O_S_INTERPOSING},
4586 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
4587 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
4588 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
4589 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
4590 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
4591 { NULL, 0}
4592 };
4593
4594 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
4595 {
4596 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
4597 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
4598 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
4599 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
4600 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
4601 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
4602 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
4603 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
4604 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
4605 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4606 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4607 { NULL, 0}
4608 };
4609
4610 /* Get the section type from NAME. Return 256 if NAME is unknown. */
4611
4612 unsigned int
4613 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
4614 {
4615 const bfd_mach_o_xlat_name *x;
4616 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4617
4618 for (x = bfd_mach_o_section_type_name; x->name; x++)
4619 if (strcmp (x->name, name) == 0)
4620 {
4621 /* We found it... does the target support it? */
4622 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
4623 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
4624 return x->val; /* OK. */
4625 else
4626 break; /* Not supported. */
4627 }
4628 /* Maximum section ID = 0xff. */
4629 return 256;
4630 }
4631
4632 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
4633
4634 unsigned int
4635 bfd_mach_o_get_section_attribute_from_name (const char *name)
4636 {
4637 const bfd_mach_o_xlat_name *x;
4638
4639 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
4640 if (strcmp (x->name, name) == 0)
4641 return x->val;
4642 return (unsigned int)-1;
4643 }
4644
4645 int
4646 bfd_mach_o_core_fetch_environment (bfd *abfd,
4647 unsigned char **rbuf,
4648 unsigned int *rlen)
4649 {
4650 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4651 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
4652 unsigned int i = 0;
4653
4654 for (i = 0; i < mdata->header.ncmds; i++)
4655 {
4656 bfd_mach_o_load_command *cur = &mdata->commands[i];
4657 bfd_mach_o_segment_command *seg = NULL;
4658
4659 if (cur->type != BFD_MACH_O_LC_SEGMENT)
4660 continue;
4661
4662 seg = &cur->command.segment;
4663
4664 if ((seg->vmaddr + seg->vmsize) == stackaddr)
4665 {
4666 unsigned long start = seg->fileoff;
4667 unsigned long end = seg->fileoff + seg->filesize;
4668 unsigned char *buf = bfd_malloc (1024);
4669 unsigned long size = 1024;
4670
4671 for (;;)
4672 {
4673 bfd_size_type nread = 0;
4674 unsigned long offset;
4675 int found_nonnull = 0;
4676
4677 if (size > (end - start))
4678 size = (end - start);
4679
4680 buf = bfd_realloc_or_free (buf, size);
4681 if (buf == NULL)
4682 return -1;
4683
4684 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
4685 {
4686 free (buf);
4687 return -1;
4688 }
4689
4690 nread = bfd_bread (buf, size, abfd);
4691
4692 if (nread != size)
4693 {
4694 free (buf);
4695 return -1;
4696 }
4697
4698 for (offset = 4; offset <= size; offset += 4)
4699 {
4700 unsigned long val;
4701
4702 val = *((unsigned long *) (buf + size - offset));
4703 if (! found_nonnull)
4704 {
4705 if (val != 0)
4706 found_nonnull = 1;
4707 }
4708 else if (val == 0x0)
4709 {
4710 unsigned long bottom;
4711 unsigned long top;
4712
4713 bottom = seg->fileoff + seg->filesize - offset;
4714 top = seg->fileoff + seg->filesize - 4;
4715 *rbuf = bfd_malloc (top - bottom);
4716 *rlen = top - bottom;
4717
4718 memcpy (*rbuf, buf + size - *rlen, *rlen);
4719 free (buf);
4720 return 0;
4721 }
4722 }
4723
4724 if (size == (end - start))
4725 break;
4726
4727 size *= 2;
4728 }
4729
4730 free (buf);
4731 }
4732 }
4733
4734 return -1;
4735 }
4736
4737 char *
4738 bfd_mach_o_core_file_failing_command (bfd *abfd)
4739 {
4740 unsigned char *buf = NULL;
4741 unsigned int len = 0;
4742 int ret = -1;
4743
4744 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
4745 if (ret < 0)
4746 return NULL;
4747
4748 return (char *) buf;
4749 }
4750
4751 int
4752 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
4753 {
4754 return 0;
4755 }
4756
4757 static bfd_mach_o_uuid_command *
4758 bfd_mach_o_lookup_uuid_command (bfd *abfd)
4759 {
4760 bfd_mach_o_load_command *uuid_cmd;
4761 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
4762 if (ncmd != 1)
4763 return FALSE;
4764 return &uuid_cmd->command.uuid;
4765 }
4766
4767 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
4768
4769 static bfd_boolean
4770 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
4771 {
4772 bfd_mach_o_uuid_command *dsym_uuid_cmd;
4773
4774 BFD_ASSERT (abfd);
4775 BFD_ASSERT (uuid_cmd);
4776
4777 if (!bfd_check_format (abfd, bfd_object))
4778 return FALSE;
4779
4780 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
4781 || bfd_mach_o_get_data (abfd) == NULL
4782 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
4783 return FALSE;
4784
4785 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4786 if (dsym_uuid_cmd == NULL)
4787 return FALSE;
4788
4789 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
4790 sizeof (uuid_cmd->uuid)) != 0)
4791 return FALSE;
4792
4793 return TRUE;
4794 }
4795
4796 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
4797 The caller is responsible for closing the returned BFD object and
4798 its my_archive if the returned BFD is in a fat dSYM. */
4799
4800 static bfd *
4801 bfd_mach_o_find_dsym (const char *dsym_filename,
4802 const bfd_mach_o_uuid_command *uuid_cmd,
4803 const bfd_arch_info_type *arch)
4804 {
4805 bfd *base_dsym_bfd, *dsym_bfd;
4806
4807 BFD_ASSERT (uuid_cmd);
4808
4809 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
4810 if (base_dsym_bfd == NULL)
4811 return NULL;
4812
4813 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
4814 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
4815 return dsym_bfd;
4816
4817 bfd_close (dsym_bfd);
4818 if (base_dsym_bfd != dsym_bfd)
4819 bfd_close (base_dsym_bfd);
4820
4821 return NULL;
4822 }
4823
4824 /* Return a BFD created from a dSYM file for ABFD.
4825 The caller is responsible for closing the returned BFD object, its
4826 filename, and its my_archive if the returned BFD is in a fat dSYM. */
4827
4828 static bfd *
4829 bfd_mach_o_follow_dsym (bfd *abfd)
4830 {
4831 char *dsym_filename;
4832 bfd_mach_o_uuid_command *uuid_cmd;
4833 bfd *dsym_bfd, *base_bfd = abfd;
4834 const char *base_basename;
4835
4836 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
4837 return NULL;
4838
4839 if (abfd->my_archive)
4840 base_bfd = abfd->my_archive;
4841 /* BFD may have been opened from a stream. */
4842 if (base_bfd->filename == NULL)
4843 {
4844 bfd_set_error (bfd_error_invalid_operation);
4845 return NULL;
4846 }
4847 base_basename = lbasename (base_bfd->filename);
4848
4849 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4850 if (uuid_cmd == NULL)
4851 return NULL;
4852
4853 /* TODO: We assume the DWARF file has the same as the binary's.
4854 It seems apple's GDB checks all files in the dSYM bundle directory.
4855 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
4856 */
4857 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
4858 + strlen (dsym_subdir) + 1
4859 + strlen (base_basename) + 1);
4860 sprintf (dsym_filename, "%s%s/%s",
4861 base_bfd->filename, dsym_subdir, base_basename);
4862
4863 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
4864 bfd_get_arch_info (abfd));
4865 if (dsym_bfd == NULL)
4866 free (dsym_filename);
4867
4868 return dsym_bfd;
4869 }
4870
4871 bfd_boolean
4872 bfd_mach_o_find_nearest_line (bfd *abfd,
4873 asection *section,
4874 asymbol **symbols,
4875 bfd_vma offset,
4876 const char **filename_ptr,
4877 const char **functionname_ptr,
4878 unsigned int *line_ptr)
4879 {
4880 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4881 if (mdata == NULL)
4882 return FALSE;
4883 switch (mdata->header.filetype)
4884 {
4885 case BFD_MACH_O_MH_OBJECT:
4886 break;
4887 case BFD_MACH_O_MH_EXECUTE:
4888 case BFD_MACH_O_MH_DYLIB:
4889 case BFD_MACH_O_MH_BUNDLE:
4890 case BFD_MACH_O_MH_KEXT_BUNDLE:
4891 if (mdata->dwarf2_find_line_info == NULL)
4892 {
4893 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
4894 /* When we couldn't find dSYM for this binary, we look for
4895 the debug information in the binary itself. In this way,
4896 we won't try finding separated dSYM again because
4897 mdata->dwarf2_find_line_info will be filled. */
4898 if (! mdata->dsym_bfd)
4899 break;
4900 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
4901 dwarf_debug_sections, symbols,
4902 &mdata->dwarf2_find_line_info))
4903 return FALSE;
4904 }
4905 break;
4906 default:
4907 return FALSE;
4908 }
4909 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
4910 section, symbols, offset,
4911 filename_ptr, functionname_ptr,
4912 line_ptr, NULL, 0,
4913 &mdata->dwarf2_find_line_info))
4914 return TRUE;
4915 return FALSE;
4916 }
4917
4918 bfd_boolean
4919 bfd_mach_o_close_and_cleanup (bfd *abfd)
4920 {
4921 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4922 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
4923 {
4924 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
4925 bfd_mach_o_free_cached_info (abfd);
4926 if (mdata->dsym_bfd != NULL)
4927 {
4928 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
4929 char *dsym_filename = (char *)(fat_bfd
4930 ? fat_bfd->filename
4931 : mdata->dsym_bfd->filename);
4932 bfd_close (mdata->dsym_bfd);
4933 mdata->dsym_bfd = NULL;
4934 if (fat_bfd)
4935 bfd_close (fat_bfd);
4936 free (dsym_filename);
4937 }
4938 }
4939
4940 if (bfd_get_format (abfd) == bfd_archive
4941 && abfd->xvec == &mach_o_fat_vec)
4942 return TRUE;
4943 return _bfd_generic_close_and_cleanup (abfd);
4944 }
4945
4946 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
4947 {
4948 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4949 asection *asect;
4950 free (mdata->dyn_reloc_cache);
4951 mdata->dyn_reloc_cache = NULL;
4952 for (asect = abfd->sections; asect != NULL; asect = asect->next)
4953 {
4954 free (asect->relocation);
4955 asect->relocation = NULL;
4956 }
4957
4958 return TRUE;
4959 }
4960
4961 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
4962 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
4963
4964 #define bfd_mach_o_swap_reloc_in NULL
4965 #define bfd_mach_o_swap_reloc_out NULL
4966 #define bfd_mach_o_print_thread NULL
4967 #define bfd_mach_o_tgt_seg_table NULL
4968 #define bfd_mach_o_section_type_valid_for_tgt NULL
4969
4970 #define TARGET_NAME mach_o_be_vec
4971 #define TARGET_STRING "mach-o-be"
4972 #define TARGET_ARCHITECTURE bfd_arch_unknown
4973 #define TARGET_BIG_ENDIAN 1
4974 #define TARGET_ARCHIVE 0
4975 #define TARGET_PRIORITY 1
4976 #include "mach-o-target.c"
4977
4978 #undef TARGET_NAME
4979 #undef TARGET_STRING
4980 #undef TARGET_ARCHITECTURE
4981 #undef TARGET_BIG_ENDIAN
4982 #undef TARGET_ARCHIVE
4983 #undef TARGET_PRIORITY
4984
4985 #define TARGET_NAME mach_o_le_vec
4986 #define TARGET_STRING "mach-o-le"
4987 #define TARGET_ARCHITECTURE bfd_arch_unknown
4988 #define TARGET_BIG_ENDIAN 0
4989 #define TARGET_ARCHIVE 0
4990 #define TARGET_PRIORITY 1
4991
4992 #include "mach-o-target.c"
4993
4994 #undef TARGET_NAME
4995 #undef TARGET_STRING
4996 #undef TARGET_ARCHITECTURE
4997 #undef TARGET_BIG_ENDIAN
4998 #undef TARGET_ARCHIVE
4999 #undef TARGET_PRIORITY
5000
5001 /* Not yet handled: creating an archive. */
5002 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5003
5004 /* Not used. */
5005 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5006 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5007 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5008 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5009 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5010 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5011 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5012 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5013 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5014 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5015
5016 #define TARGET_NAME mach_o_fat_vec
5017 #define TARGET_STRING "mach-o-fat"
5018 #define TARGET_ARCHITECTURE bfd_arch_unknown
5019 #define TARGET_BIG_ENDIAN 1
5020 #define TARGET_ARCHIVE 1
5021 #define TARGET_PRIORITY 0
5022
5023 #include "mach-o-target.c"
5024
5025 #undef TARGET_NAME
5026 #undef TARGET_STRING
5027 #undef TARGET_ARCHITECTURE
5028 #undef TARGET_BIG_ENDIAN
5029 #undef TARGET_ARCHIVE
5030 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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