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support 16 sect-diffs for mach-o
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "mach-o.h"
25 #include "bfd.h"
26 #include "libbfd.h"
27 #include "libiberty.h"
28 #include "aout/stab_gnu.h"
29 #include "mach-o/reloc.h"
30 #include "mach-o/external.h"
31 #include <ctype.h>
32 #include <stdlib.h>
33 #include <string.h>
34
35 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
36 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
37 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
38
39 #define FILE_ALIGN(off, algn) \
40 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
41
42 unsigned int
43 bfd_mach_o_version (bfd *abfd)
44 {
45 bfd_mach_o_data_struct *mdata = NULL;
46
47 BFD_ASSERT (bfd_mach_o_valid (abfd));
48 mdata = bfd_mach_o_get_data (abfd);
49
50 return mdata->header.version;
51 }
52
53 bfd_boolean
54 bfd_mach_o_valid (bfd *abfd)
55 {
56 if (abfd == NULL || abfd->xvec == NULL)
57 return FALSE;
58
59 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
60 return FALSE;
61
62 if (bfd_mach_o_get_data (abfd) == NULL)
63 return FALSE;
64 return TRUE;
65 }
66
67 static INLINE bfd_boolean
68 mach_o_wide_p (bfd_mach_o_header *header)
69 {
70 switch (header->version)
71 {
72 case 1:
73 return FALSE;
74 case 2:
75 return TRUE;
76 default:
77 BFD_FAIL ();
78 return FALSE;
79 }
80 }
81
82 static INLINE bfd_boolean
83 bfd_mach_o_wide_p (bfd *abfd)
84 {
85 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
86 }
87
88 /* Tables to translate well known Mach-O segment/section names to bfd
89 names. Use of canonical names (such as .text or .debug_frame) is required
90 by gdb. */
91
92 /* __TEXT Segment. */
93 static const mach_o_section_name_xlat text_section_names_xlat[] =
94 {
95 { ".text", "__text",
96 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
97 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
98 { ".const", "__const",
99 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
100 BFD_MACH_O_S_ATTR_NONE, 0},
101 { ".static_const", "__static_const",
102 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
103 BFD_MACH_O_S_ATTR_NONE, 0},
104 { ".cstring", "__cstring",
105 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
106 BFD_MACH_O_S_CSTRING_LITERALS,
107 BFD_MACH_O_S_ATTR_NONE, 0},
108 { ".literal4", "__literal4",
109 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
110 BFD_MACH_O_S_ATTR_NONE, 2},
111 { ".literal8", "__literal8",
112 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
113 BFD_MACH_O_S_ATTR_NONE, 3},
114 { ".literal16", "__literal16",
115 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
116 BFD_MACH_O_S_ATTR_NONE, 4},
117 { ".constructor", "__constructor",
118 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
119 BFD_MACH_O_S_ATTR_NONE, 0},
120 { ".destructor", "__destructor",
121 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
122 BFD_MACH_O_S_ATTR_NONE, 0},
123 { ".eh_frame", "__eh_frame",
124 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
125 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
126 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
127 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
128 { NULL, NULL, 0, 0, 0, 0}
129 };
130
131 /* __DATA Segment. */
132 static const mach_o_section_name_xlat data_section_names_xlat[] =
133 {
134 { ".data", "__data",
135 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
136 BFD_MACH_O_S_ATTR_NONE, 0},
137 { ".bss", "__bss",
138 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
139 BFD_MACH_O_S_ATTR_NONE, 0},
140 { ".const_data", "__const",
141 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
142 BFD_MACH_O_S_ATTR_NONE, 0},
143 { ".static_data", "__static_data",
144 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
145 BFD_MACH_O_S_ATTR_NONE, 0},
146 { ".mod_init_func", "__mod_init_func",
147 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
148 BFD_MACH_O_S_ATTR_NONE, 2},
149 { ".mod_term_func", "__mod_term_func",
150 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
151 BFD_MACH_O_S_ATTR_NONE, 2},
152 { ".dyld", "__dyld",
153 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
154 BFD_MACH_O_S_ATTR_NONE, 0},
155 { ".cfstring", "__cfstring",
156 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
157 BFD_MACH_O_S_ATTR_NONE, 2},
158 { NULL, NULL, 0, 0, 0, 0}
159 };
160
161 /* __DWARF Segment. */
162 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
163 {
164 { ".debug_frame", "__debug_frame",
165 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
166 BFD_MACH_O_S_ATTR_DEBUG, 0},
167 { ".debug_info", "__debug_info",
168 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
169 BFD_MACH_O_S_ATTR_DEBUG, 0},
170 { ".debug_abbrev", "__debug_abbrev",
171 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
172 BFD_MACH_O_S_ATTR_DEBUG, 0},
173 { ".debug_aranges", "__debug_aranges",
174 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
175 BFD_MACH_O_S_ATTR_DEBUG, 0},
176 { ".debug_macinfo", "__debug_macinfo",
177 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
178 BFD_MACH_O_S_ATTR_DEBUG, 0},
179 { ".debug_line", "__debug_line",
180 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
181 BFD_MACH_O_S_ATTR_DEBUG, 0},
182 { ".debug_loc", "__debug_loc",
183 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
184 BFD_MACH_O_S_ATTR_DEBUG, 0},
185 { ".debug_pubnames", "__debug_pubnames",
186 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
187 BFD_MACH_O_S_ATTR_DEBUG, 0},
188 { ".debug_pubtypes", "__debug_pubtypes",
189 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
190 BFD_MACH_O_S_ATTR_DEBUG, 0},
191 { ".debug_str", "__debug_str",
192 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
193 BFD_MACH_O_S_ATTR_DEBUG, 0},
194 { ".debug_ranges", "__debug_ranges",
195 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
196 BFD_MACH_O_S_ATTR_DEBUG, 0},
197 { ".debug_macro", "__debug_macro",
198 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
199 BFD_MACH_O_S_ATTR_DEBUG, 0},
200 { NULL, NULL, 0, 0, 0, 0}
201 };
202
203 /* __OBJC Segment. */
204 static const mach_o_section_name_xlat objc_section_names_xlat[] =
205 {
206 { ".objc_class", "__class",
207 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
208 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
209 { ".objc_meta_class", "__meta_class",
210 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
211 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
212 { ".objc_cat_cls_meth", "__cat_cls_meth",
213 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
214 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
215 { ".objc_cat_inst_meth", "__cat_inst_meth",
216 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
217 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
218 { ".objc_protocol", "__protocol",
219 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
220 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
221 { ".objc_string_object", "__string_object",
222 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
223 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
224 { ".objc_cls_meth", "__cls_meth",
225 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
226 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
227 { ".objc_inst_meth", "__inst_meth",
228 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
229 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
230 { ".objc_cls_refs", "__cls_refs",
231 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
232 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
233 { ".objc_message_refs", "__message_refs",
234 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
235 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
236 { ".objc_symbols", "__symbols",
237 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
238 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
239 { ".objc_category", "__category",
240 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
241 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
242 { ".objc_class_vars", "__class_vars",
243 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
244 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
245 { ".objc_instance_vars", "__instance_vars",
246 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
247 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
248 { ".objc_module_info", "__module_info",
249 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
250 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
251 { ".objc_selector_strs", "__selector_strs",
252 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
253 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
254 { ".objc_image_info", "__image_info",
255 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
256 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
257 { ".objc_selector_fixup", "__sel_fixup",
258 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
259 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
260 /* Objc V1 */
261 { ".objc1_class_ext", "__class_ext",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 { ".objc1_property_list", "__property",
265 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
266 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
267 { ".objc1_protocol_ext", "__protocol_ext",
268 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
269 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
270 { NULL, NULL, 0, 0, 0, 0}
271 };
272
273 static const mach_o_segment_name_xlat segsec_names_xlat[] =
274 {
275 { "__TEXT", text_section_names_xlat },
276 { "__DATA", data_section_names_xlat },
277 { "__DWARF", dwarf_section_names_xlat },
278 { "__OBJC", objc_section_names_xlat },
279 { NULL, NULL }
280 };
281
282 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
283
284 /* For both cases bfd-name => mach-o name and vice versa, the specific target
285 is checked before the generic. This allows a target (e.g. ppc for cstring)
286 to override the generic definition with a more specific one. */
287
288 /* Fetch the translation from a Mach-O section designation (segment, section)
289 as a bfd short name, if one exists. Otherwise return NULL.
290
291 Allow the segment and section names to be unterminated 16 byte arrays. */
292
293 const mach_o_section_name_xlat *
294 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
295 const char *sectname)
296 {
297 const struct mach_o_segment_name_xlat *seg;
298 const mach_o_section_name_xlat *sec;
299 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
300
301 /* First try any target-specific translations defined... */
302 if (bed->segsec_names_xlat)
303 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
304 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
305 for (sec = seg->sections; sec->mach_o_name; sec++)
306 if (strncmp (sec->mach_o_name, sectname,
307 BFD_MACH_O_SECTNAME_SIZE) == 0)
308 return sec;
309
310 /* ... and then the Mach-O generic ones. */
311 for (seg = segsec_names_xlat; seg->segname; seg++)
312 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
313 for (sec = seg->sections; sec->mach_o_name; sec++)
314 if (strncmp (sec->mach_o_name, sectname,
315 BFD_MACH_O_SECTNAME_SIZE) == 0)
316 return sec;
317
318 return NULL;
319 }
320
321 /* If the bfd_name for this section is a 'canonical' form for which we
322 know the Mach-O data, return the segment name and the data for the
323 Mach-O equivalent. Otherwise return NULL. */
324
325 const mach_o_section_name_xlat *
326 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
327 const char **segname)
328 {
329 const struct mach_o_segment_name_xlat *seg;
330 const mach_o_section_name_xlat *sec;
331 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
332 *segname = NULL;
333
334 if (bfd_name[0] != '.')
335 return NULL;
336
337 /* First try any target-specific translations defined... */
338 if (bed->segsec_names_xlat)
339 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
340 for (sec = seg->sections; sec->bfd_name; sec++)
341 if (strcmp (bfd_name, sec->bfd_name) == 0)
342 {
343 *segname = seg->segname;
344 return sec;
345 }
346
347 /* ... and then the Mach-O generic ones. */
348 for (seg = segsec_names_xlat; seg->segname; seg++)
349 for (sec = seg->sections; sec->bfd_name; sec++)
350 if (strcmp (bfd_name, sec->bfd_name) == 0)
351 {
352 *segname = seg->segname;
353 return sec;
354 }
355
356 return NULL;
357 }
358
359 /* Convert Mach-O section name to BFD.
360
361 Try to use standard/canonical names, for which we have tables including
362 default flag settings - which are returned. Otherwise forge a new name
363 in the form "<segmentname>.<sectionname>" this will be prefixed with
364 LC_SEGMENT. if the segment name does not begin with an underscore.
365
366 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
367 terminated if the name length is exactly 16 bytes - but must be if the name
368 length is less than 16 characters). */
369
370 void
371 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
372 const char *secname, const char **name,
373 flagword *flags)
374 {
375 const mach_o_section_name_xlat *xlat;
376 char *res;
377 unsigned int len;
378 const char *pfx = "";
379
380 *name = NULL;
381 *flags = SEC_NO_FLAGS;
382
383 /* First search for a canonical name...
384 xlat will be non-null if there is an entry for segname, secname. */
385 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
386 if (xlat)
387 {
388 len = strlen (xlat->bfd_name);
389 res = bfd_alloc (abfd, len+1);
390 if (res == NULL)
391 return;
392 memcpy (res, xlat->bfd_name, len+1);
393 *name = res;
394 *flags = xlat->bfd_flags;
395 return;
396 }
397
398 /* ... else we make up a bfd name from the segment concatenated with the
399 section. */
400
401 len = 16 + 1 + 16 + 1;
402
403 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
404 with an underscore. */
405 if (segname[0] != '_')
406 {
407 static const char seg_pfx[] = "LC_SEGMENT.";
408
409 pfx = seg_pfx;
410 len += sizeof (seg_pfx) - 1;
411 }
412
413 res = bfd_alloc (abfd, len);
414 if (res == NULL)
415 return;
416 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
417 *name = res;
418 }
419
420 /* Convert a bfd section name to a Mach-O segment + section name.
421
422 If the name is a canonical one for which we have a Darwin match
423 return the translation table - which contains defaults for flags,
424 type, attribute and default alignment data.
425
426 Otherwise, expand the bfd_name (assumed to be in the form
427 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
428
429 static const mach_o_section_name_xlat *
430 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
431 asection *sect,
432 bfd_mach_o_section *section)
433 {
434 const mach_o_section_name_xlat *xlat;
435 const char *name = bfd_get_section_name (abfd, sect);
436 const char *segname;
437 const char *dot;
438 unsigned int len;
439 unsigned int seglen;
440 unsigned int seclen;
441
442 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
443 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
444
445 /* See if is a canonical name ... */
446 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
447 if (xlat)
448 {
449 strcpy (section->segname, segname);
450 strcpy (section->sectname, xlat->mach_o_name);
451 return xlat;
452 }
453
454 /* .. else we convert our constructed one back to Mach-O.
455 Strip LC_SEGMENT. prefix, if present. */
456 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
457 name += 11;
458
459 /* Find a dot. */
460 dot = strchr (name, '.');
461 len = strlen (name);
462
463 /* Try to split name into segment and section names. */
464 if (dot && dot != name)
465 {
466 seglen = dot - name;
467 seclen = len - (dot + 1 - name);
468
469 if (seglen < 16 && seclen < 16)
470 {
471 memcpy (section->segname, name, seglen);
472 section->segname[seglen] = 0;
473 memcpy (section->sectname, dot + 1, seclen);
474 section->sectname[seclen] = 0;
475 return NULL;
476 }
477 }
478
479 /* The segment and section names are both missing - don't make them
480 into dots. */
481 if (dot && dot == name)
482 return NULL;
483
484 /* Just duplicate the name into both segment and section. */
485 if (len > 16)
486 len = 16;
487 memcpy (section->segname, name, len);
488 section->segname[len] = 0;
489 memcpy (section->sectname, name, len);
490 section->sectname[len] = 0;
491 return NULL;
492 }
493
494 /* Return the size of an entry for section SEC.
495 Must be called only for symbol pointer section and symbol stubs
496 sections. */
497
498 unsigned int
499 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
500 {
501 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
502 {
503 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
504 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
505 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
506 case BFD_MACH_O_S_SYMBOL_STUBS:
507 return sec->reserved2;
508 default:
509 BFD_FAIL ();
510 return 0;
511 }
512 }
513
514 /* Return the number of indirect symbols for a section.
515 Must be called only for symbol pointer section and symbol stubs
516 sections. */
517
518 unsigned int
519 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
520 {
521 unsigned int elsz;
522
523 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
524 if (elsz == 0)
525 return 0;
526 else
527 return sec->size / elsz;
528 }
529
530
531 /* Copy any private info we understand from the input symbol
532 to the output symbol. */
533
534 bfd_boolean
535 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
536 asymbol *isymbol,
537 bfd *obfd ATTRIBUTE_UNUSED,
538 asymbol *osymbol)
539 {
540 bfd_mach_o_asymbol *os, *is;
541 os = (bfd_mach_o_asymbol *)osymbol;
542 is = (bfd_mach_o_asymbol *)isymbol;
543 os->n_type = is->n_type;
544 os->n_sect = is->n_sect;
545 os->n_desc = is->n_desc;
546 os->symbol.udata.i = is->symbol.udata.i;
547 return TRUE;
548 }
549
550 /* Copy any private info we understand from the input section
551 to the output section. */
552
553 bfd_boolean
554 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asection *isection,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asection *osection)
558 {
559 if (osection->used_by_bfd == NULL)
560 osection->used_by_bfd = isection->used_by_bfd;
561 else
562 if (isection->used_by_bfd != NULL)
563 memcpy (osection->used_by_bfd, isection->used_by_bfd,
564 sizeof (bfd_mach_o_section));
565
566 if (osection->used_by_bfd != NULL)
567 ((bfd_mach_o_section *)osection->used_by_bfd)->bfdsection = osection;
568
569 return TRUE;
570 }
571
572 /* Copy any private info we understand from the input bfd
573 to the output bfd. */
574
575 bfd_boolean
576 bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
577 {
578 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
579 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
580 return TRUE;
581
582 BFD_ASSERT (bfd_mach_o_valid (ibfd));
583 BFD_ASSERT (bfd_mach_o_valid (obfd));
584
585 /* FIXME: copy commands. */
586
587 return TRUE;
588 }
589
590 /* This allows us to set up to 32 bits of flags (unless we invent some
591 fiendish scheme to subdivide). For now, we'll just set the file flags
592 without error checking - just overwrite. */
593
594 bfd_boolean
595 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
596 {
597 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
598
599 if (!mdata)
600 return FALSE;
601
602 mdata->header.flags = flags;
603 return TRUE;
604 }
605
606 /* Count the total number of symbols. */
607
608 static long
609 bfd_mach_o_count_symbols (bfd *abfd)
610 {
611 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
612
613 if (mdata->symtab == NULL)
614 return 0;
615 return mdata->symtab->nsyms;
616 }
617
618 long
619 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
620 {
621 long nsyms = bfd_mach_o_count_symbols (abfd);
622
623 return ((nsyms + 1) * sizeof (asymbol *));
624 }
625
626 long
627 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
628 {
629 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
630 long nsyms = bfd_mach_o_count_symbols (abfd);
631 bfd_mach_o_symtab_command *sym = mdata->symtab;
632 unsigned long j;
633
634 if (nsyms < 0)
635 return nsyms;
636
637 if (nsyms == 0)
638 {
639 /* Do not try to read symbols if there are none. */
640 alocation[0] = NULL;
641 return 0;
642 }
643
644 if (!bfd_mach_o_read_symtab_symbols (abfd))
645 {
646 (*_bfd_error_handler)
647 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
648 return 0;
649 }
650
651 BFD_ASSERT (sym->symbols != NULL);
652
653 for (j = 0; j < sym->nsyms; j++)
654 alocation[j] = &sym->symbols[j].symbol;
655
656 alocation[j] = NULL;
657
658 return nsyms;
659 }
660
661 /* Create synthetic symbols for indirect symbols. */
662
663 long
664 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
665 long symcount ATTRIBUTE_UNUSED,
666 asymbol **syms ATTRIBUTE_UNUSED,
667 long dynsymcount ATTRIBUTE_UNUSED,
668 asymbol **dynsyms ATTRIBUTE_UNUSED,
669 asymbol **ret)
670 {
671 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
672 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
673 bfd_mach_o_symtab_command *symtab = mdata->symtab;
674 asymbol *s;
675 unsigned long count, i, j, n;
676 size_t size;
677 char *names;
678 char *nul_name;
679
680 *ret = NULL;
681
682 /* Stop now if no symbols or no indirect symbols. */
683 if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
684 return 0;
685
686 if (dysymtab->nindirectsyms == 0)
687 return 0;
688
689 /* We need to allocate a bfd symbol for every indirect symbol and to
690 allocate the memory for its name. */
691 count = dysymtab->nindirectsyms;
692 size = count * sizeof (asymbol) + 1;
693
694 for (j = 0; j < count; j++)
695 {
696 unsigned int isym = dysymtab->indirect_syms[j];
697
698 /* Some indirect symbols are anonymous. */
699 if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
700 size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
701 }
702
703 s = *ret = (asymbol *) bfd_malloc (size);
704 if (s == NULL)
705 return -1;
706 names = (char *) (s + count);
707 nul_name = names;
708 *names++ = 0;
709
710 n = 0;
711 for (i = 0; i < mdata->nsects; i++)
712 {
713 bfd_mach_o_section *sec = mdata->sections[i];
714 unsigned int first, last;
715 bfd_vma addr;
716 bfd_vma entry_size;
717
718 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
719 {
720 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
721 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
722 case BFD_MACH_O_S_SYMBOL_STUBS:
723 /* Only these sections have indirect symbols. */
724 first = sec->reserved1;
725 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
726 addr = sec->addr;
727 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
728 for (j = first; j < last; j++)
729 {
730 unsigned int isym = dysymtab->indirect_syms[j];
731
732 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
733 s->section = sec->bfdsection;
734 s->value = addr - sec->addr;
735 s->udata.p = NULL;
736
737 if (isym < symtab->nsyms
738 && symtab->symbols[isym].symbol.name)
739 {
740 const char *sym = symtab->symbols[isym].symbol.name;
741 size_t len;
742
743 s->name = names;
744 len = strlen (sym);
745 memcpy (names, sym, len);
746 names += len;
747 memcpy (names, "$stub", sizeof ("$stub"));
748 names += sizeof ("$stub");
749 }
750 else
751 s->name = nul_name;
752
753 addr += entry_size;
754 s++;
755 n++;
756 }
757 break;
758 default:
759 break;
760 }
761 }
762
763 return n;
764 }
765
766 void
767 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
768 asymbol *symbol,
769 symbol_info *ret)
770 {
771 bfd_symbol_info (symbol, ret);
772 }
773
774 void
775 bfd_mach_o_print_symbol (bfd *abfd,
776 void * afile,
777 asymbol *symbol,
778 bfd_print_symbol_type how)
779 {
780 FILE *file = (FILE *) afile;
781 const char *name;
782 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
783
784 switch (how)
785 {
786 case bfd_print_symbol_name:
787 fprintf (file, "%s", symbol->name);
788 break;
789 default:
790 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
791 if (asym->n_type & BFD_MACH_O_N_STAB)
792 name = bfd_get_stab_name (asym->n_type);
793 else
794 switch (asym->n_type & BFD_MACH_O_N_TYPE)
795 {
796 case BFD_MACH_O_N_UNDF:
797 if (symbol->value == 0)
798 name = "UND";
799 else
800 name = "COM";
801 break;
802 case BFD_MACH_O_N_ABS:
803 name = "ABS";
804 break;
805 case BFD_MACH_O_N_INDR:
806 name = "INDR";
807 break;
808 case BFD_MACH_O_N_PBUD:
809 name = "PBUD";
810 break;
811 case BFD_MACH_O_N_SECT:
812 name = "SECT";
813 break;
814 default:
815 name = "???";
816 break;
817 }
818 if (name == NULL)
819 name = "";
820 fprintf (file, " %02x %-6s %02x %04x",
821 asym->n_type, name, asym->n_sect, asym->n_desc);
822 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
823 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
824 fprintf (file, " [%s]", symbol->section->name);
825 fprintf (file, " %s", symbol->name);
826 }
827 }
828
829 static void
830 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
831 bfd_mach_o_cpu_subtype msubtype,
832 enum bfd_architecture *type,
833 unsigned long *subtype)
834 {
835 *subtype = bfd_arch_unknown;
836
837 switch (mtype)
838 {
839 case BFD_MACH_O_CPU_TYPE_VAX:
840 *type = bfd_arch_vax;
841 break;
842 case BFD_MACH_O_CPU_TYPE_MC680x0:
843 *type = bfd_arch_m68k;
844 break;
845 case BFD_MACH_O_CPU_TYPE_I386:
846 *type = bfd_arch_i386;
847 *subtype = bfd_mach_i386_i386;
848 break;
849 case BFD_MACH_O_CPU_TYPE_X86_64:
850 *type = bfd_arch_i386;
851 *subtype = bfd_mach_x86_64;
852 break;
853 case BFD_MACH_O_CPU_TYPE_MIPS:
854 *type = bfd_arch_mips;
855 break;
856 case BFD_MACH_O_CPU_TYPE_MC98000:
857 *type = bfd_arch_m98k;
858 break;
859 case BFD_MACH_O_CPU_TYPE_HPPA:
860 *type = bfd_arch_hppa;
861 break;
862 case BFD_MACH_O_CPU_TYPE_ARM:
863 *type = bfd_arch_arm;
864 switch (msubtype)
865 {
866 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
867 *subtype = bfd_mach_arm_4T;
868 break;
869 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
870 *subtype = bfd_mach_arm_4T; /* Best fit ? */
871 break;
872 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
873 *subtype = bfd_mach_arm_5TE;
874 break;
875 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
876 *subtype = bfd_mach_arm_XScale;
877 break;
878 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
879 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
880 break;
881 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
882 default:
883 break;
884 }
885 break;
886 case BFD_MACH_O_CPU_TYPE_MC88000:
887 *type = bfd_arch_m88k;
888 break;
889 case BFD_MACH_O_CPU_TYPE_SPARC:
890 *type = bfd_arch_sparc;
891 *subtype = bfd_mach_sparc;
892 break;
893 case BFD_MACH_O_CPU_TYPE_I860:
894 *type = bfd_arch_i860;
895 break;
896 case BFD_MACH_O_CPU_TYPE_ALPHA:
897 *type = bfd_arch_alpha;
898 break;
899 case BFD_MACH_O_CPU_TYPE_POWERPC:
900 *type = bfd_arch_powerpc;
901 *subtype = bfd_mach_ppc;
902 break;
903 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
904 *type = bfd_arch_powerpc;
905 *subtype = bfd_mach_ppc64;
906 break;
907 default:
908 *type = bfd_arch_unknown;
909 break;
910 }
911 }
912
913 static bfd_boolean
914 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
915 {
916 struct mach_o_header_external raw;
917 unsigned int size;
918
919 size = mach_o_wide_p (header) ?
920 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
921
922 bfd_h_put_32 (abfd, header->magic, raw.magic);
923 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
924 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
925 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
926 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
927 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
928 bfd_h_put_32 (abfd, header->flags, raw.flags);
929
930 if (mach_o_wide_p (header))
931 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
932
933 if (bfd_seek (abfd, 0, SEEK_SET) != 0
934 || bfd_bwrite (&raw, size, abfd) != size)
935 return FALSE;
936
937 return TRUE;
938 }
939
940 static int
941 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
942 {
943 bfd_mach_o_thread_command *cmd = &command->command.thread;
944 unsigned int i;
945 struct mach_o_thread_command_external raw;
946 unsigned int offset;
947
948 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
949 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
950
951 offset = 8;
952 for (i = 0; i < cmd->nflavours; i++)
953 {
954 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
955 BFD_ASSERT (cmd->flavours[i].offset ==
956 (command->offset + offset + BFD_MACH_O_LC_SIZE));
957
958 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
959 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
960
961 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
962 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
963 return -1;
964
965 offset += cmd->flavours[i].size + sizeof (raw);
966 }
967
968 return 0;
969 }
970
971 long
972 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
973 asection *asect)
974 {
975 return (asect->reloc_count + 1) * sizeof (arelent *);
976 }
977
978 static int
979 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
980 struct mach_o_reloc_info_external *raw,
981 arelent *res, asymbol **syms)
982 {
983 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
984 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
985 bfd_mach_o_reloc_info reloc;
986 bfd_vma addr;
987 bfd_vma symnum;
988 asymbol **sym;
989
990 addr = bfd_get_32 (abfd, raw->r_address);
991 symnum = bfd_get_32 (abfd, raw->r_symbolnum);
992
993 if (addr & BFD_MACH_O_SR_SCATTERED)
994 {
995 unsigned int j;
996
997 /* Scattered relocation.
998 Extract section and offset from r_value. */
999 res->sym_ptr_ptr = NULL;
1000 res->addend = 0;
1001 for (j = 0; j < mdata->nsects; j++)
1002 {
1003 bfd_mach_o_section *sect = mdata->sections[j];
1004 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1005 {
1006 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1007 res->addend = symnum - sect->addr;
1008 break;
1009 }
1010 }
1011 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1012 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1013 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1014 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1015 reloc.r_scattered = 1;
1016 }
1017 else
1018 {
1019 unsigned int num = BFD_MACH_O_GET_R_SYMBOLNUM (symnum);
1020 res->addend = 0;
1021 res->address = addr;
1022 if (symnum & BFD_MACH_O_R_EXTERN)
1023 {
1024 sym = syms + num;
1025 reloc.r_extern = 1;
1026 }
1027 else
1028 {
1029 BFD_ASSERT (num != 0);
1030 BFD_ASSERT (num <= mdata->nsects);
1031 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1032 /* For a symbol defined in section S, the addend (stored in the
1033 binary) contains the address of the section. To comply with
1034 bfd conventio, substract the section address.
1035 Use the address from the header, so that the user can modify
1036 the vma of the section. */
1037 res->addend = -mdata->sections[num - 1]->addr;
1038 reloc.r_extern = 0;
1039 }
1040 res->sym_ptr_ptr = sym;
1041 reloc.r_type = BFD_MACH_O_GET_R_TYPE (symnum);
1042 reloc.r_length = BFD_MACH_O_GET_R_LENGTH (symnum);
1043 reloc.r_pcrel = (symnum & BFD_MACH_O_R_PCREL) ? 1 : 0;
1044 reloc.r_scattered = 0;
1045 }
1046
1047 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1048 return -1;
1049 return 0;
1050 }
1051
1052 static int
1053 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1054 unsigned long count,
1055 arelent *res, asymbol **syms)
1056 {
1057 unsigned long i;
1058 struct mach_o_reloc_info_external *native_relocs;
1059 bfd_size_type native_size;
1060
1061 /* Allocate and read relocs. */
1062 native_size = count * BFD_MACH_O_RELENT_SIZE;
1063 native_relocs =
1064 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1065 if (native_relocs == NULL)
1066 return -1;
1067
1068 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1069 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1070 goto err;
1071
1072 for (i = 0; i < count; i++)
1073 {
1074 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1075 &res[i], syms) < 0)
1076 goto err;
1077 }
1078 free (native_relocs);
1079 return i;
1080 err:
1081 free (native_relocs);
1082 return -1;
1083 }
1084
1085 long
1086 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1087 arelent **rels, asymbol **syms)
1088 {
1089 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1090 unsigned long i;
1091 arelent *res;
1092
1093 if (asect->reloc_count == 0)
1094 return 0;
1095
1096 /* No need to go further if we don't know how to read relocs. */
1097 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1098 return 0;
1099
1100 if (asect->relocation == NULL)
1101 {
1102 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1103 if (res == NULL)
1104 return -1;
1105
1106 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1107 asect->reloc_count, res, syms) < 0)
1108 {
1109 free (res);
1110 return -1;
1111 }
1112 asect->relocation = res;
1113 }
1114
1115 res = asect->relocation;
1116 for (i = 0; i < asect->reloc_count; i++)
1117 rels[i] = &res[i];
1118 rels[i] = NULL;
1119
1120 return i;
1121 }
1122
1123 long
1124 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1125 {
1126 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1127
1128 if (mdata->dysymtab == NULL)
1129 return 1;
1130 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1131 * sizeof (arelent *);
1132 }
1133
1134 long
1135 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1136 struct bfd_symbol **syms)
1137 {
1138 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1139 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1140 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1141 unsigned long i;
1142 arelent *res;
1143
1144 if (dysymtab == NULL)
1145 return 0;
1146 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1147 return 0;
1148
1149 /* No need to go further if we don't know how to read relocs. */
1150 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1151 return 0;
1152
1153 if (mdata->dyn_reloc_cache == NULL)
1154 {
1155 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1156 * sizeof (arelent));
1157 if (res == NULL)
1158 return -1;
1159
1160 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1161 dysymtab->nextrel, res, syms) < 0)
1162 {
1163 free (res);
1164 return -1;
1165 }
1166
1167 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1168 dysymtab->nlocrel,
1169 res + dysymtab->nextrel, syms) < 0)
1170 {
1171 free (res);
1172 return -1;
1173 }
1174
1175 mdata->dyn_reloc_cache = res;
1176 }
1177
1178 res = mdata->dyn_reloc_cache;
1179 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1180 rels[i] = &res[i];
1181 rels[i] = NULL;
1182 return i;
1183 }
1184
1185 static bfd_boolean
1186 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1187 {
1188 unsigned int i;
1189 arelent **entries;
1190 asection *sec;
1191 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1192
1193 sec = section->bfdsection;
1194 if (sec->reloc_count == 0)
1195 return TRUE;
1196
1197 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1198 return TRUE;
1199
1200 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1201 return FALSE;
1202
1203 /* Convert and write. */
1204 entries = section->bfdsection->orelocation;
1205 for (i = 0; i < section->nreloc; i++)
1206 {
1207 arelent *rel = entries[i];
1208 struct mach_o_reloc_info_external raw;
1209 bfd_mach_o_reloc_info info, *pinfo = &info;
1210
1211 /* Convert relocation to an intermediate representation. */
1212 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1213 return FALSE;
1214
1215 /* Lower the relocation info. */
1216 if (pinfo->r_scattered)
1217 {
1218 unsigned long v;
1219
1220 v = BFD_MACH_O_SR_SCATTERED
1221 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1222 | BFD_MACH_O_SET_SR_LENGTH(pinfo->r_length)
1223 | BFD_MACH_O_SET_SR_TYPE(pinfo->r_type)
1224 | BFD_MACH_O_SET_SR_ADDRESS(pinfo->r_address);
1225 /* Note: scattered relocs have field in reverse order... */
1226 bfd_put_32 (abfd, v, raw.r_address);
1227 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1228 }
1229 else
1230 {
1231 unsigned long v;
1232
1233 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1234 v = BFD_MACH_O_SET_R_SYMBOLNUM (pinfo->r_value)
1235 | (pinfo->r_pcrel ? BFD_MACH_O_R_PCREL : 0)
1236 | BFD_MACH_O_SET_R_LENGTH (pinfo->r_length)
1237 | (pinfo->r_extern ? BFD_MACH_O_R_EXTERN : 0)
1238 | BFD_MACH_O_SET_R_TYPE (pinfo->r_type);
1239 bfd_put_32 (abfd, v, raw.r_symbolnum);
1240 }
1241
1242 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1243 != BFD_MACH_O_RELENT_SIZE)
1244 return FALSE;
1245 }
1246 return TRUE;
1247 }
1248
1249 static int
1250 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1251 {
1252 struct mach_o_section_32_external raw;
1253
1254 memcpy (raw.sectname, section->sectname, 16);
1255 memcpy (raw.segname, section->segname, 16);
1256 bfd_h_put_32 (abfd, section->addr, raw.addr);
1257 bfd_h_put_32 (abfd, section->size, raw.size);
1258 bfd_h_put_32 (abfd, section->offset, raw.offset);
1259 bfd_h_put_32 (abfd, section->align, raw.align);
1260 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1261 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1262 bfd_h_put_32 (abfd, section->flags, raw.flags);
1263 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1264 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1265
1266 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1267 != BFD_MACH_O_SECTION_SIZE)
1268 return -1;
1269
1270 return 0;
1271 }
1272
1273 static int
1274 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1275 {
1276 struct mach_o_section_64_external raw;
1277
1278 memcpy (raw.sectname, section->sectname, 16);
1279 memcpy (raw.segname, section->segname, 16);
1280 bfd_h_put_64 (abfd, section->addr, raw.addr);
1281 bfd_h_put_64 (abfd, section->size, raw.size);
1282 bfd_h_put_32 (abfd, section->offset, raw.offset);
1283 bfd_h_put_32 (abfd, section->align, raw.align);
1284 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1285 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1286 bfd_h_put_32 (abfd, section->flags, raw.flags);
1287 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1288 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1289 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1290
1291 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1292 != BFD_MACH_O_SECTION_64_SIZE)
1293 return -1;
1294
1295 return 0;
1296 }
1297
1298 static int
1299 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1300 {
1301 struct mach_o_segment_command_32_external raw;
1302 bfd_mach_o_segment_command *seg = &command->command.segment;
1303 bfd_mach_o_section *sec;
1304
1305 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1306
1307 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1308 if (!bfd_mach_o_write_relocs (abfd, sec))
1309 return -1;
1310
1311 memcpy (raw.segname, seg->segname, 16);
1312 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1313 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1314 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1315 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1316 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1317 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1318 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1319 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1320
1321 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1322 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1323 return -1;
1324
1325 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1326 if (bfd_mach_o_write_section_32 (abfd, sec))
1327 return -1;
1328
1329 return 0;
1330 }
1331
1332 static int
1333 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1334 {
1335 struct mach_o_segment_command_64_external raw;
1336 bfd_mach_o_segment_command *seg = &command->command.segment;
1337 bfd_mach_o_section *sec;
1338
1339 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1340
1341 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1342 if (!bfd_mach_o_write_relocs (abfd, sec))
1343 return -1;
1344
1345 memcpy (raw.segname, seg->segname, 16);
1346 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1347 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1348 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1349 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1350 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1351 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1352 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1353 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1354
1355 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1356 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1357 return -1;
1358
1359 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1360 if (bfd_mach_o_write_section_64 (abfd, sec))
1361 return -1;
1362
1363 return 0;
1364 }
1365
1366 static bfd_boolean
1367 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1368 {
1369 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1370 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1371 unsigned long i;
1372 unsigned int wide = bfd_mach_o_wide_p (abfd);
1373 unsigned int symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
1374 struct bfd_strtab_hash *strtab;
1375 asymbol **symbols = bfd_get_outsymbols (abfd);
1376
1377 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1378
1379 /* Write the symbols first. */
1380 mdata->filelen = FILE_ALIGN(mdata->filelen, wide ? 3 : 2);
1381 sym->symoff = mdata->filelen;
1382 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1383 return FALSE;
1384
1385 sym->nsyms = bfd_get_symcount (abfd);
1386 mdata->filelen += sym->nsyms * symlen;
1387
1388 strtab = _bfd_stringtab_init ();
1389 if (strtab == NULL)
1390 return FALSE;
1391
1392 if (sym->nsyms > 0)
1393 /* Although we don't strictly need to do this, for compatibility with
1394 Darwin system tools, actually output an empty string for the index
1395 0 entry. */
1396 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1397
1398 for (i = 0; i < sym->nsyms; i++)
1399 {
1400 bfd_size_type str_index;
1401 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1402
1403 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1404 /* An index of 0 always means the empty string. */
1405 str_index = 0;
1406 else
1407 {
1408 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1409
1410 if (str_index == (bfd_size_type) -1)
1411 goto err;
1412 }
1413
1414 if (wide)
1415 {
1416 struct mach_o_nlist_64_external raw;
1417
1418 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1419 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1420 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1421 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1422 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1423 raw.n_value);
1424
1425 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1426 goto err;
1427 }
1428 else
1429 {
1430 struct mach_o_nlist_external raw;
1431
1432 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1433 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1434 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1435 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1436 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1437 raw.n_value);
1438
1439 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1440 goto err;
1441 }
1442 }
1443 sym->strsize = _bfd_stringtab_size (strtab);
1444 sym->stroff = mdata->filelen;
1445 mdata->filelen += sym->strsize;
1446
1447 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1448 goto err;
1449 _bfd_stringtab_free (strtab);
1450
1451 /* The command. */
1452 {
1453 struct mach_o_symtab_command_external raw;
1454
1455 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1456 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1457 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1458 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1459
1460 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1461 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1462 return FALSE;
1463 }
1464
1465 return TRUE;
1466
1467 err:
1468 _bfd_stringtab_free (strtab);
1469 return FALSE;
1470 }
1471
1472 /* Write a dysymtab command.
1473 TODO: Possibly coalesce writes of smaller objects. */
1474
1475 static bfd_boolean
1476 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
1477 {
1478 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
1479
1480 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
1481
1482 if (cmd->nmodtab != 0)
1483 {
1484 unsigned int i;
1485
1486 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
1487 return FALSE;
1488
1489 for (i = 0; i < cmd->nmodtab; i++)
1490 {
1491 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
1492 unsigned int iinit;
1493 unsigned int ninit;
1494
1495 iinit = module->iinit & 0xffff;
1496 iinit |= ((module->iterm & 0xffff) << 16);
1497
1498 ninit = module->ninit & 0xffff;
1499 ninit |= ((module->nterm & 0xffff) << 16);
1500
1501 if (bfd_mach_o_wide_p (abfd))
1502 {
1503 struct mach_o_dylib_module_64_external w;
1504
1505 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
1506 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
1507 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
1508 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
1509 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
1510 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
1511 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
1512 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
1513 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
1514 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
1515 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
1516 bfd_h_put_64 (abfd, module->objc_module_info_addr,
1517 &w.objc_module_info_addr);
1518 bfd_h_put_32 (abfd, module->objc_module_info_size,
1519 &w.objc_module_info_size);
1520
1521 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
1522 return FALSE;
1523 }
1524 else
1525 {
1526 struct mach_o_dylib_module_external n;
1527
1528 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
1529 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
1530 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
1531 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
1532 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
1533 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
1534 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
1535 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
1536 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
1537 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
1538 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
1539 bfd_h_put_32 (abfd, module->objc_module_info_addr,
1540 &n.objc_module_info_addr);
1541 bfd_h_put_32 (abfd, module->objc_module_info_size,
1542 &n.objc_module_info_size);
1543
1544 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
1545 return FALSE;
1546 }
1547 }
1548 }
1549
1550 if (cmd->ntoc != 0)
1551 {
1552 unsigned int i;
1553
1554 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
1555 return FALSE;
1556
1557 for (i = 0; i < cmd->ntoc; i++)
1558 {
1559 struct mach_o_dylib_table_of_contents_external raw;
1560 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
1561
1562 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
1563 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
1564
1565 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1566 return FALSE;
1567 }
1568 }
1569
1570 if (cmd->nindirectsyms > 0)
1571 {
1572 unsigned int i;
1573
1574 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
1575 return FALSE;
1576
1577 for (i = 0; i < cmd->nindirectsyms; ++i)
1578 {
1579 unsigned char raw[4];
1580
1581 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
1582 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1583 return FALSE;
1584 }
1585 }
1586
1587 if (cmd->nextrefsyms != 0)
1588 {
1589 unsigned int i;
1590
1591 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
1592 return FALSE;
1593
1594 for (i = 0; i < cmd->nextrefsyms; i++)
1595 {
1596 unsigned long v;
1597 unsigned char raw[4];
1598 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
1599
1600 /* Fields isym and flags are written as bit-fields, thus we need
1601 a specific processing for endianness. */
1602
1603 if (bfd_big_endian (abfd))
1604 {
1605 v = ((ref->isym & 0xffffff) << 8);
1606 v |= ref->flags & 0xff;
1607 }
1608 else
1609 {
1610 v = ref->isym & 0xffffff;
1611 v |= ((ref->flags & 0xff) << 24);
1612 }
1613
1614 bfd_h_put_32 (abfd, v, raw);
1615 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1616 return FALSE;
1617 }
1618 }
1619
1620 /* The command. */
1621 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
1622 return FALSE;
1623 else
1624 {
1625 struct mach_o_dysymtab_command_external raw;
1626
1627 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
1628 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
1629 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
1630 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
1631 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
1632 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
1633 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
1634 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
1635 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
1636 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
1637 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
1638 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
1639 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
1640 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
1641 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
1642 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
1643 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
1644 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
1645
1646 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1647 return FALSE;
1648 }
1649
1650 return TRUE;
1651 }
1652
1653 static unsigned
1654 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
1655 {
1656 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
1657
1658 /* Just leave debug symbols where they are (pretend they are local, and
1659 then they will just be sorted on position). */
1660 if (s->n_type & BFD_MACH_O_N_STAB)
1661 return 0;
1662
1663 /* Local (we should never see an undefined local AFAICT). */
1664 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
1665 return 0;
1666
1667 /* Common symbols look like undefined externs. */
1668 if (mtyp == BFD_MACH_O_N_UNDF)
1669 return 2;
1670
1671 /* A defined non-local, non-debug symbol. */
1672 return 1;
1673 }
1674
1675 static int
1676 bfd_mach_o_cf_symbols (const void *a, const void *b)
1677 {
1678 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
1679 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
1680 unsigned int soa, sob;
1681
1682 soa = bfd_mach_o_primary_symbol_sort_key (sa);
1683 sob = bfd_mach_o_primary_symbol_sort_key (sb);
1684 if (soa < sob)
1685 return -1;
1686
1687 if (soa > sob)
1688 return 1;
1689
1690 /* If it's local or stab, just preserve the input order. */
1691 if (soa == 0)
1692 {
1693 if (sa->symbol.udata.i < sb->symbol.udata.i)
1694 return -1;
1695 if (sa->symbol.udata.i > sb->symbol.udata.i)
1696 return 1;
1697
1698 /* This is probably an error. */
1699 return 0;
1700 }
1701
1702 /* The second sort key is name. */
1703 return strcmp (sa->symbol.name, sb->symbol.name);
1704 }
1705
1706 /* Process the symbols.
1707
1708 This should be OK for single-module files - but it is not likely to work
1709 for multi-module shared libraries.
1710
1711 (a) If the application has not filled in the relevant mach-o fields, make
1712 an estimate.
1713
1714 (b) Order them, like this:
1715 ( i) local.
1716 (unsorted)
1717 ( ii) external defined
1718 (by name)
1719 (iii) external undefined/common
1720 (by name)
1721 ( iv) common
1722 (by name)
1723 */
1724
1725 static bfd_boolean
1726 bfd_mach_o_mangle_symbols (bfd *abfd)
1727 {
1728 unsigned long i;
1729 asymbol **symbols = bfd_get_outsymbols (abfd);
1730
1731 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
1732 return TRUE;
1733
1734 for (i = 0; i < bfd_get_symcount (abfd); i++)
1735 {
1736 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1737
1738 /* We use this value, which is out-of-range as a symbol index, to signal
1739 that the mach-o-specific data are not filled in and need to be created
1740 from the bfd values. It is much preferable for the application to do
1741 this, since more meaningful diagnostics can be made that way. */
1742
1743 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
1744 {
1745 /* No symbol information has been set - therefore determine
1746 it from the bfd symbol flags/info. */
1747 if (s->symbol.section == bfd_abs_section_ptr)
1748 s->n_type = BFD_MACH_O_N_ABS;
1749 else if (s->symbol.section == bfd_und_section_ptr)
1750 {
1751 s->n_type = BFD_MACH_O_N_UNDF;
1752 if (s->symbol.flags & BSF_WEAK)
1753 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
1754 /* mach-o automatically makes undefined symbols extern. */
1755 s->n_type |= BFD_MACH_O_N_EXT;
1756 s->symbol.flags |= BSF_GLOBAL;
1757 }
1758 else if (s->symbol.section == bfd_com_section_ptr)
1759 {
1760 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
1761 s->symbol.flags |= BSF_GLOBAL;
1762 }
1763 else
1764 s->n_type = BFD_MACH_O_N_SECT;
1765
1766 if (s->symbol.flags & BSF_GLOBAL)
1767 s->n_type |= BFD_MACH_O_N_EXT;
1768 }
1769
1770 /* Put the section index in, where required. */
1771 if ((s->symbol.section != bfd_abs_section_ptr
1772 && s->symbol.section != bfd_und_section_ptr
1773 && s->symbol.section != bfd_com_section_ptr)
1774 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
1775 && s->symbol.name == NULL))
1776 s->n_sect = s->symbol.section->target_index;
1777
1778 /* Number to preserve order for local and debug syms. */
1779 s->symbol.udata.i = i;
1780 }
1781
1782 /* Sort the symbols. */
1783 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
1784 sizeof (asymbol *), bfd_mach_o_cf_symbols);
1785
1786 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1787 {
1788 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1789 s->symbol.udata.i = i; /* renumber. */
1790 }
1791
1792 return TRUE;
1793 }
1794
1795 /* We build a flat table of sections, which can be re-ordered if necessary.
1796 Fill in the section number and other mach-o-specific data. */
1797
1798 static bfd_boolean
1799 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
1800 {
1801 asection *sec;
1802 unsigned target_index;
1803 unsigned nsect;
1804
1805 nsect = bfd_count_sections (abfd);
1806
1807 /* Don't do it if it's already set - assume the application knows what it's
1808 doing. */
1809 if (mdata->nsects == nsect
1810 && (mdata->nsects == 0 || mdata->sections != NULL))
1811 return TRUE;
1812
1813 mdata->nsects = nsect;
1814 mdata->sections = bfd_alloc (abfd,
1815 mdata->nsects * sizeof (bfd_mach_o_section *));
1816 if (mdata->sections == NULL)
1817 return FALSE;
1818
1819 /* We need to check that this can be done... */
1820 if (nsect > 255)
1821 (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
1822 " maximum is 255,\n"), nsect);
1823
1824 /* Create Mach-O sections.
1825 Section type, attribute and align should have been set when the
1826 section was created - either read in or specified. */
1827 target_index = 0;
1828 for (sec = abfd->sections; sec; sec = sec->next)
1829 {
1830 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
1831 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
1832
1833 mdata->sections[target_index] = msect;
1834
1835 msect->addr = bfd_get_section_vma (abfd, sec);
1836 msect->size = bfd_get_section_size (sec);
1837
1838 /* Use the largest alignment set, in case it was bumped after the
1839 section was created. */
1840 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
1841
1842 msect->offset = 0;
1843 sec->target_index = ++target_index;
1844 }
1845
1846 return TRUE;
1847 }
1848
1849 bfd_boolean
1850 bfd_mach_o_write_contents (bfd *abfd)
1851 {
1852 unsigned int i;
1853 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1854
1855 /* Make the commands, if not already present. */
1856 if (mdata->header.ncmds == 0)
1857 if (!bfd_mach_o_build_commands (abfd))
1858 return FALSE;
1859
1860 if (!bfd_mach_o_write_header (abfd, &mdata->header))
1861 return FALSE;
1862
1863 for (i = 0; i < mdata->header.ncmds; i++)
1864 {
1865 struct mach_o_load_command_external raw;
1866 bfd_mach_o_load_command *cur = &mdata->commands[i];
1867 unsigned long typeflag;
1868
1869 typeflag = cur->type | (cur->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
1870
1871 bfd_h_put_32 (abfd, typeflag, raw.cmd);
1872 bfd_h_put_32 (abfd, cur->len, raw.cmdsize);
1873
1874 if (bfd_seek (abfd, cur->offset, SEEK_SET) != 0
1875 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
1876 return FALSE;
1877
1878 switch (cur->type)
1879 {
1880 case BFD_MACH_O_LC_SEGMENT:
1881 if (bfd_mach_o_write_segment_32 (abfd, cur) != 0)
1882 return FALSE;
1883 break;
1884 case BFD_MACH_O_LC_SEGMENT_64:
1885 if (bfd_mach_o_write_segment_64 (abfd, cur) != 0)
1886 return FALSE;
1887 break;
1888 case BFD_MACH_O_LC_SYMTAB:
1889 if (!bfd_mach_o_write_symtab (abfd, cur))
1890 return FALSE;
1891 break;
1892 case BFD_MACH_O_LC_DYSYMTAB:
1893 if (!bfd_mach_o_write_dysymtab (abfd, cur))
1894 return FALSE;
1895 break;
1896 case BFD_MACH_O_LC_SYMSEG:
1897 break;
1898 case BFD_MACH_O_LC_THREAD:
1899 case BFD_MACH_O_LC_UNIXTHREAD:
1900 if (bfd_mach_o_write_thread (abfd, cur) != 0)
1901 return FALSE;
1902 break;
1903 case BFD_MACH_O_LC_LOADFVMLIB:
1904 case BFD_MACH_O_LC_IDFVMLIB:
1905 case BFD_MACH_O_LC_IDENT:
1906 case BFD_MACH_O_LC_FVMFILE:
1907 case BFD_MACH_O_LC_PREPAGE:
1908 case BFD_MACH_O_LC_LOAD_DYLIB:
1909 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
1910 case BFD_MACH_O_LC_ID_DYLIB:
1911 case BFD_MACH_O_LC_REEXPORT_DYLIB:
1912 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
1913 case BFD_MACH_O_LC_LOAD_DYLINKER:
1914 case BFD_MACH_O_LC_ID_DYLINKER:
1915 case BFD_MACH_O_LC_PREBOUND_DYLIB:
1916 case BFD_MACH_O_LC_ROUTINES:
1917 case BFD_MACH_O_LC_SUB_FRAMEWORK:
1918 break;
1919 default:
1920 (*_bfd_error_handler) (_("unable to write unknown load command 0x%lx"),
1921 (unsigned long) cur->type);
1922 return FALSE;
1923 }
1924 }
1925
1926 return TRUE;
1927 }
1928
1929 static void
1930 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
1931 asection *sec)
1932 {
1933 bfd_mach_o_section *s = (bfd_mach_o_section *)sec->used_by_bfd;
1934 if (seg->sect_head == NULL)
1935 seg->sect_head = s;
1936 else
1937 seg->sect_tail->next = s;
1938 seg->sect_tail = s;
1939 }
1940
1941 /* Create section Mach-O flags from BFD flags. */
1942
1943 static void
1944 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1945 {
1946 flagword bfd_flags;
1947 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
1948
1949 /* Create default flags. */
1950 bfd_flags = bfd_get_section_flags (abfd, sec);
1951 if ((bfd_flags & SEC_CODE) == SEC_CODE)
1952 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
1953 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
1954 | BFD_MACH_O_S_REGULAR;
1955 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
1956 s->flags = BFD_MACH_O_S_ZEROFILL;
1957 else if (bfd_flags & SEC_DEBUGGING)
1958 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
1959 else
1960 s->flags = BFD_MACH_O_S_REGULAR;
1961 }
1962
1963 /* Count the number of sections in the list for the segment named.
1964
1965 The special case of NULL or "" for the segment name is valid for
1966 an MH_OBJECT file and means 'all sections available'.
1967
1968 Requires that the sections table in mdata be filled in.
1969
1970 Returns the number of sections (0 is valid).
1971 Any number > 255 signals an invalid section count, although we will,
1972 perhaps, allow the file to be written (in line with Darwin tools up
1973 to XCode 4).
1974
1975 A section count of (unsigned long) -1 signals a definite error. */
1976
1977 static unsigned long
1978 bfd_mach_o_count_sections_for_seg (const char *segment,
1979 bfd_mach_o_data_struct *mdata)
1980 {
1981 unsigned i,j;
1982 if (mdata == NULL || mdata->sections == NULL)
1983 return (unsigned long) -1;
1984
1985 /* The MH_OBJECT case, all sections are considered; Although nsects is
1986 is an unsigned long, the maximum valid section count is 255 and this
1987 will have been checked already by mangle_sections. */
1988 if (segment == NULL || segment[0] == '\0')
1989 return mdata->nsects;
1990
1991 /* Count the number of sections we see in this segment. */
1992 j = 0;
1993 for (i = 0; i < mdata->nsects; ++i)
1994 {
1995 bfd_mach_o_section *s = mdata->sections[i];
1996 if (strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
1997 j++;
1998 }
1999 return j;
2000 }
2001
2002 static bfd_boolean
2003 bfd_mach_o_build_seg_command (const char *segment,
2004 bfd_mach_o_data_struct *mdata,
2005 bfd_mach_o_segment_command *seg)
2006 {
2007 unsigned i;
2008 int is_mho = (segment == NULL || segment[0] == '\0');
2009
2010 /* Fill segment command. */
2011 if (is_mho)
2012 memset (seg->segname, 0, sizeof (seg->segname));
2013 else
2014 strncpy (seg->segname, segment, sizeof (seg->segname));
2015
2016 /* TODO: fix this up for non-MH_OBJECT cases. */
2017 seg->vmaddr = 0;
2018 seg->vmsize = 0;
2019
2020 seg->fileoff = mdata->filelen;
2021 seg->filesize = 0;
2022 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2023 | BFD_MACH_O_PROT_EXECUTE;
2024 seg->initprot = seg->maxprot;
2025 seg->flags = 0;
2026 seg->sect_head = NULL;
2027 seg->sect_tail = NULL;
2028
2029 /* Append sections to the segment.
2030
2031 This is a little tedious, we have to honor the need to account zerofill
2032 sections after all the rest. This forces us to do the calculation of
2033 total vmsize in three passes so that any alignment increments are
2034 properly accounted. */
2035
2036 for (i = 0; i < mdata->nsects; ++i)
2037 {
2038 bfd_mach_o_section *s = mdata->sections[i];
2039 asection *sec = s->bfdsection;
2040
2041 /* If we're not making an MH_OBJECT, check whether this section is from
2042 our segment, and skip if not. Otherwise, just add all sections. */
2043 if (! is_mho
2044 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2045 continue;
2046
2047 /* Although we account for zerofill section sizes in vm order, they are
2048 placed in the file in source sequence. */
2049 bfd_mach_o_append_section_to_segment (seg, sec);
2050 s->offset = 0;
2051
2052 /* Zerofill sections have zero file size & offset,
2053 and are not written. */
2054 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2055 || (s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2056 == BFD_MACH_O_S_GB_ZEROFILL)
2057 continue;
2058
2059 if (s->size > 0)
2060 {
2061 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2062 seg->vmsize += s->size;
2063
2064 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2065 seg->filesize += s->size;
2066
2067 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2068 s->offset = mdata->filelen;
2069 }
2070
2071 sec->filepos = s->offset;
2072 mdata->filelen += s->size;
2073 }
2074
2075 /* Now pass through again, for zerofill, only now we just update the vmsize. */
2076 for (i = 0; i < mdata->nsects; ++i)
2077 {
2078 bfd_mach_o_section *s = mdata->sections[i];
2079
2080 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL)
2081 continue;
2082
2083 if (! is_mho
2084 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2085 continue;
2086
2087 if (s->size > 0)
2088 {
2089 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2090 seg->vmsize += s->size;
2091 }
2092 }
2093
2094 /* Now pass through again, for zerofill_GB. */
2095 for (i = 0; i < mdata->nsects; ++i)
2096 {
2097 bfd_mach_o_section *s = mdata->sections[i];
2098
2099 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_GB_ZEROFILL)
2100 continue;
2101
2102 if (! is_mho
2103 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2104 continue;
2105
2106 if (s->size > 0)
2107 {
2108 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2109 seg->vmsize += s->size;
2110 }
2111 }
2112
2113 /* Allocate space for the relocations. */
2114 mdata->filelen = FILE_ALIGN(mdata->filelen, 2);
2115
2116 for (i = 0; i < mdata->nsects; ++i)
2117 {
2118 bfd_mach_o_section *ms = mdata->sections[i];
2119 asection *sec = ms->bfdsection;
2120
2121 if ((ms->nreloc = sec->reloc_count) == 0)
2122 {
2123 ms->reloff = 0;
2124 continue;
2125 }
2126 sec->rel_filepos = mdata->filelen;
2127 ms->reloff = sec->rel_filepos;
2128 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2129 }
2130
2131 return TRUE;
2132 }
2133
2134 /* Count the number of indirect symbols in the image.
2135 Requires that the sections are in their final order. */
2136
2137 static unsigned int
2138 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2139 {
2140 unsigned int i;
2141 unsigned int nisyms = 0;
2142
2143 for (i = 0; i < mdata->nsects; ++i)
2144 {
2145 bfd_mach_o_section *sec = mdata->sections[i];
2146
2147 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2148 {
2149 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2150 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2151 case BFD_MACH_O_S_SYMBOL_STUBS:
2152 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2153 break;
2154 default:
2155 break;
2156 }
2157 }
2158 return nisyms;
2159 }
2160
2161 static bfd_boolean
2162 bfd_mach_o_build_dysymtab_command (bfd *abfd,
2163 bfd_mach_o_data_struct *mdata,
2164 bfd_mach_o_load_command *cmd)
2165 {
2166 bfd_mach_o_dysymtab_command *dsym = &cmd->command.dysymtab;
2167
2168 /* TODO:
2169 We are not going to try and fill these in yet and, moreover, we are
2170 going to bail if they are already set. */
2171 if (dsym->nmodtab != 0
2172 || dsym->ntoc != 0
2173 || dsym->nextrefsyms != 0)
2174 {
2175 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
2176 " implemented for dysymtab commands."));
2177 return FALSE;
2178 }
2179
2180 dsym->ilocalsym = 0;
2181
2182 if (bfd_get_symcount (abfd) > 0)
2183 {
2184 asymbol **symbols = bfd_get_outsymbols (abfd);
2185 unsigned long i;
2186
2187 /* Count the number of each kind of symbol. */
2188 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2189 {
2190 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2191 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2192 break;
2193 }
2194 dsym->nlocalsym = i;
2195 dsym->iextdefsym = i;
2196 for (; i < bfd_get_symcount (abfd); ++i)
2197 {
2198 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2199 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2200 break;
2201 }
2202 dsym->nextdefsym = i - dsym->nlocalsym;
2203 dsym->iundefsym = dsym->nextdefsym + dsym->iextdefsym;
2204 dsym->nundefsym = bfd_get_symcount (abfd)
2205 - dsym->nlocalsym
2206 - dsym->nextdefsym;
2207 }
2208 else
2209 {
2210 dsym->nlocalsym = 0;
2211 dsym->iextdefsym = 0;
2212 dsym->nextdefsym = 0;
2213 dsym->iundefsym = 0;
2214 dsym->nundefsym = 0;
2215 }
2216
2217 dsym->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2218 if (dsym->nindirectsyms > 0)
2219 {
2220 unsigned i;
2221 unsigned n;
2222
2223 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2224 dsym->indirectsymoff = mdata->filelen;
2225 mdata->filelen += dsym->nindirectsyms * 4;
2226
2227 dsym->indirect_syms = bfd_zalloc (abfd, dsym->nindirectsyms * 4);
2228 if (dsym->indirect_syms == NULL)
2229 return FALSE;
2230
2231 n = 0;
2232 for (i = 0; i < mdata->nsects; ++i)
2233 {
2234 bfd_mach_o_section *sec = mdata->sections[i];
2235
2236 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2237 {
2238 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2239 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2240 case BFD_MACH_O_S_SYMBOL_STUBS:
2241 {
2242 unsigned j, num;
2243 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2244
2245 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2246 if (isyms == NULL || num == 0)
2247 break;
2248 /* Record the starting index in the reserved1 field. */
2249 sec->reserved1 = n;
2250 for (j = 0; j < num; j++, n++)
2251 {
2252 if (isyms[j] == NULL)
2253 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2254 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2255 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2256 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2257 | BFD_MACH_O_INDIRECT_SYM_ABS;
2258 else
2259 dsym->indirect_syms[n] = isyms[j]->symbol.udata.i;
2260 }
2261 }
2262 break;
2263 default:
2264 break;
2265 }
2266 }
2267 }
2268
2269 return TRUE;
2270 }
2271
2272 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2273 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2274 and copy functionality. */
2275
2276 bfd_boolean
2277 bfd_mach_o_build_commands (bfd *abfd)
2278 {
2279 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2280 unsigned wide = mach_o_wide_p (&mdata->header);
2281 int segcmd_idx = -1;
2282 int symtab_idx = -1;
2283 int dysymtab_idx = -1;
2284 unsigned long base_offset = 0;
2285
2286 /* Return now if commands are already present. */
2287 if (mdata->header.ncmds)
2288 return FALSE;
2289
2290 /* Fill in the file type, if not already set. */
2291
2292 if (mdata->header.filetype == 0)
2293 {
2294 if (abfd->flags & EXEC_P)
2295 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2296 else if (abfd->flags & DYNAMIC)
2297 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2298 else
2299 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2300 }
2301
2302 /* If hasn't already been done, flatten sections list, and sort
2303 if/when required. Must be done before the symbol table is adjusted,
2304 since that depends on properly numbered sections. */
2305 if (mdata->nsects == 0 || mdata->sections == NULL)
2306 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2307 return FALSE;
2308
2309 /* Order the symbol table, fill-in/check mach-o specific fields and
2310 partition out any indirect symbols. */
2311 if (!bfd_mach_o_mangle_symbols (abfd))
2312 return FALSE;
2313
2314 /* Very simple command set (only really applicable to MH_OBJECTs):
2315 All the commands are optional - present only when there is suitable data.
2316 (i.e. it is valid to have an empty file)
2317
2318 a command (segment) to contain all the sections,
2319 command for the symbol table,
2320 a command for the dysymtab.
2321
2322 ??? maybe we should assert that this is an MH_OBJECT? */
2323
2324 if (mdata->nsects > 0)
2325 {
2326 segcmd_idx = 0;
2327 mdata->header.ncmds = 1;
2328 }
2329
2330 if (bfd_get_symcount (abfd) > 0)
2331 {
2332 mdata->header.ncmds++;
2333 symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */
2334 }
2335
2336 /* FIXME:
2337 This is a rather crude test for whether we should build a dysymtab. */
2338 if (bfd_mach_o_should_emit_dysymtab ()
2339 && bfd_get_symcount (abfd))
2340 {
2341 mdata->header.ncmds++;
2342 /* If there should be a case where a dysymtab could be emitted without
2343 a symtab (seems improbable), this would need amending. */
2344 dysymtab_idx = symtab_idx + 1;
2345 }
2346
2347 if (wide)
2348 base_offset = BFD_MACH_O_HEADER_64_SIZE;
2349 else
2350 base_offset = BFD_MACH_O_HEADER_SIZE;
2351
2352 /* Well, we must have a header, at least. */
2353 mdata->filelen = base_offset;
2354
2355 /* A bit unusual, but no content is valid;
2356 as -n empty.s -o empty.o */
2357 if (mdata->header.ncmds == 0)
2358 return TRUE;
2359
2360 mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds
2361 * sizeof (bfd_mach_o_load_command));
2362 if (mdata->commands == NULL)
2363 return FALSE;
2364
2365 if (segcmd_idx >= 0)
2366 {
2367 bfd_mach_o_load_command *cmd = &mdata->commands[segcmd_idx];
2368 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2369
2370 /* Count the segctions in the special blank segment used for MH_OBJECT. */
2371 seg->nsects = bfd_mach_o_count_sections_for_seg (NULL, mdata);
2372 if (seg->nsects == (unsigned long) -1)
2373 return FALSE;
2374
2375 /* Init segment command. */
2376 cmd->offset = base_offset;
2377 if (wide)
2378 {
2379 cmd->type = BFD_MACH_O_LC_SEGMENT_64;
2380 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2381 + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
2382 }
2383 else
2384 {
2385 cmd->type = BFD_MACH_O_LC_SEGMENT;
2386 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2387 + BFD_MACH_O_SECTION_SIZE * seg->nsects;
2388 }
2389
2390 cmd->type_required = FALSE;
2391 mdata->header.sizeofcmds = cmd->len;
2392 mdata->filelen += cmd->len;
2393 }
2394
2395 if (symtab_idx >= 0)
2396 {
2397 /* Init symtab command. */
2398 bfd_mach_o_load_command *cmd = &mdata->commands[symtab_idx];
2399
2400 cmd->type = BFD_MACH_O_LC_SYMTAB;
2401 cmd->offset = base_offset;
2402 if (segcmd_idx >= 0)
2403 cmd->offset += mdata->commands[segcmd_idx].len;
2404
2405 cmd->len = sizeof (struct mach_o_symtab_command_external)
2406 + BFD_MACH_O_LC_SIZE;
2407 cmd->type_required = FALSE;
2408 mdata->header.sizeofcmds += cmd->len;
2409 mdata->filelen += cmd->len;
2410 }
2411
2412 /* If required, setup symtab command, see comment above about the quality
2413 of this test. */
2414 if (dysymtab_idx >= 0)
2415 {
2416 bfd_mach_o_load_command *cmd = &mdata->commands[dysymtab_idx];
2417
2418 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
2419 if (symtab_idx >= 0)
2420 cmd->offset = mdata->commands[symtab_idx].offset
2421 + mdata->commands[symtab_idx].len;
2422 else if (segcmd_idx >= 0)
2423 cmd->offset = mdata->commands[segcmd_idx].offset
2424 + mdata->commands[segcmd_idx].len;
2425 else
2426 cmd->offset = base_offset;
2427
2428 cmd->type_required = FALSE;
2429 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2430 + BFD_MACH_O_LC_SIZE;
2431
2432 mdata->header.sizeofcmds += cmd->len;
2433 mdata->filelen += cmd->len;
2434 }
2435
2436 /* So, now we have sized the commands and the filelen set to that.
2437 Now we can build the segment command and set the section file offsets. */
2438 if (segcmd_idx >= 0
2439 && ! bfd_mach_o_build_seg_command
2440 (NULL, mdata, &mdata->commands[segcmd_idx].command.segment))
2441 return FALSE;
2442
2443 /* If we're doing a dysymtab, cmd points to its load command. */
2444 if (dysymtab_idx >= 0
2445 && ! bfd_mach_o_build_dysymtab_command (abfd, mdata,
2446 &mdata->commands[dysymtab_idx]))
2447 return FALSE;
2448
2449 /* The symtab command is filled in when the symtab is written. */
2450 return TRUE;
2451 }
2452
2453 /* Set the contents of a section. */
2454
2455 bfd_boolean
2456 bfd_mach_o_set_section_contents (bfd *abfd,
2457 asection *section,
2458 const void * location,
2459 file_ptr offset,
2460 bfd_size_type count)
2461 {
2462 file_ptr pos;
2463
2464 /* Trying to write the first section contents will trigger the creation of
2465 the load commands if they are not already present. */
2466 if (! abfd->output_has_begun && ! bfd_mach_o_build_commands (abfd))
2467 return FALSE;
2468
2469 if (count == 0)
2470 return TRUE;
2471
2472 pos = section->filepos + offset;
2473 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2474 || bfd_bwrite (location, count, abfd) != count)
2475 return FALSE;
2476
2477 return TRUE;
2478 }
2479
2480 int
2481 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
2482 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2483 {
2484 return 0;
2485 }
2486
2487 /* Make an empty symbol. This is required only because
2488 bfd_make_section_anyway wants to create a symbol for the section. */
2489
2490 asymbol *
2491 bfd_mach_o_make_empty_symbol (bfd *abfd)
2492 {
2493 asymbol *new_symbol;
2494
2495 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
2496 if (new_symbol == NULL)
2497 return new_symbol;
2498 new_symbol->the_bfd = abfd;
2499 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
2500 return new_symbol;
2501 }
2502
2503 static bfd_boolean
2504 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
2505 {
2506 struct mach_o_header_external raw;
2507 unsigned int size;
2508 bfd_vma (*get32) (const void *) = NULL;
2509
2510 /* Just read the magic number. */
2511 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2512 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
2513 return FALSE;
2514
2515 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2516 {
2517 header->byteorder = BFD_ENDIAN_BIG;
2518 header->magic = BFD_MACH_O_MH_MAGIC;
2519 header->version = 1;
2520 get32 = bfd_getb32;
2521 }
2522 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2523 {
2524 header->byteorder = BFD_ENDIAN_LITTLE;
2525 header->magic = BFD_MACH_O_MH_MAGIC;
2526 header->version = 1;
2527 get32 = bfd_getl32;
2528 }
2529 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2530 {
2531 header->byteorder = BFD_ENDIAN_BIG;
2532 header->magic = BFD_MACH_O_MH_MAGIC_64;
2533 header->version = 2;
2534 get32 = bfd_getb32;
2535 }
2536 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2537 {
2538 header->byteorder = BFD_ENDIAN_LITTLE;
2539 header->magic = BFD_MACH_O_MH_MAGIC_64;
2540 header->version = 2;
2541 get32 = bfd_getl32;
2542 }
2543 else
2544 {
2545 header->byteorder = BFD_ENDIAN_UNKNOWN;
2546 return FALSE;
2547 }
2548
2549 /* Once the size of the header is known, read the full header. */
2550 size = mach_o_wide_p (header) ?
2551 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2552
2553 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2554 || bfd_bread (&raw, size, abfd) != size)
2555 return FALSE;
2556
2557 header->cputype = (*get32) (raw.cputype);
2558 header->cpusubtype = (*get32) (raw.cpusubtype);
2559 header->filetype = (*get32) (raw.filetype);
2560 header->ncmds = (*get32) (raw.ncmds);
2561 header->sizeofcmds = (*get32) (raw.sizeofcmds);
2562 header->flags = (*get32) (raw.flags);
2563
2564 if (mach_o_wide_p (header))
2565 header->reserved = (*get32) (raw.reserved);
2566 else
2567 header->reserved = 0;
2568
2569 return TRUE;
2570 }
2571
2572 bfd_boolean
2573 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
2574 {
2575 bfd_mach_o_section *s;
2576 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
2577
2578 s = bfd_mach_o_get_mach_o_section (sec);
2579 if (s == NULL)
2580 {
2581 flagword bfd_flags;
2582 static const mach_o_section_name_xlat * xlat;
2583
2584 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
2585 if (s == NULL)
2586 return FALSE;
2587 sec->used_by_bfd = s;
2588 s->bfdsection = sec;
2589
2590 /* Create the Darwin seg/sect name pair from the bfd name.
2591 If this is a canonical name for which a specific paiting exists
2592 there will also be defined flags, type, attribute and alignment
2593 values. */
2594 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
2595 if (xlat != NULL)
2596 {
2597 s->flags = xlat->macho_sectype | xlat->macho_secattr;
2598 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
2599 : bfdalign;
2600 bfd_set_section_alignment (abfd, sec, s->align);
2601 bfd_flags = bfd_get_section_flags (abfd, sec);
2602 if (bfd_flags == SEC_NO_FLAGS)
2603 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
2604 }
2605 else
2606 /* Create default flags. */
2607 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
2608 }
2609
2610 return _bfd_generic_new_section_hook (abfd, sec);
2611 }
2612
2613 static void
2614 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
2615 unsigned long prot)
2616 {
2617 flagword flags;
2618 bfd_mach_o_section *section;
2619
2620 flags = bfd_get_section_flags (abfd, sec);
2621 section = bfd_mach_o_get_mach_o_section (sec);
2622
2623 /* TODO: see if we should use the xlat system for doing this by
2624 preference and fall back to this for unknown sections. */
2625
2626 if (flags == SEC_NO_FLAGS)
2627 {
2628 /* Try to guess flags. */
2629 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
2630 flags = SEC_DEBUGGING;
2631 else
2632 {
2633 flags = SEC_ALLOC;
2634 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2635 != BFD_MACH_O_S_ZEROFILL)
2636 {
2637 flags |= SEC_LOAD;
2638 if (prot & BFD_MACH_O_PROT_EXECUTE)
2639 flags |= SEC_CODE;
2640 if (prot & BFD_MACH_O_PROT_WRITE)
2641 flags |= SEC_DATA;
2642 else if (prot & BFD_MACH_O_PROT_READ)
2643 flags |= SEC_READONLY;
2644 }
2645 }
2646 }
2647 else
2648 {
2649 if ((flags & SEC_DEBUGGING) == 0)
2650 flags |= SEC_ALLOC;
2651 }
2652
2653 if (section->offset != 0)
2654 flags |= SEC_HAS_CONTENTS;
2655 if (section->nreloc != 0)
2656 flags |= SEC_RELOC;
2657
2658 bfd_set_section_flags (abfd, sec, flags);
2659
2660 sec->vma = section->addr;
2661 sec->lma = section->addr;
2662 sec->size = section->size;
2663 sec->filepos = section->offset;
2664 sec->alignment_power = section->align;
2665 sec->segment_mark = 0;
2666 sec->reloc_count = section->nreloc;
2667 sec->rel_filepos = section->reloff;
2668 }
2669
2670 static asection *
2671 bfd_mach_o_make_bfd_section (bfd *abfd,
2672 const unsigned char *segname,
2673 const unsigned char *sectname)
2674 {
2675 const char *sname;
2676 flagword flags;
2677
2678 bfd_mach_o_convert_section_name_to_bfd
2679 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
2680 if (sname == NULL)
2681 return NULL;
2682
2683 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
2684 }
2685
2686 static asection *
2687 bfd_mach_o_read_section_32 (bfd *abfd,
2688 unsigned int offset,
2689 unsigned long prot)
2690 {
2691 struct mach_o_section_32_external raw;
2692 asection *sec;
2693 bfd_mach_o_section *section;
2694
2695 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2696 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
2697 != BFD_MACH_O_SECTION_SIZE))
2698 return NULL;
2699
2700 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2701 if (sec == NULL)
2702 return NULL;
2703
2704 section = bfd_mach_o_get_mach_o_section (sec);
2705 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2706 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2707 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2708 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2709 section->addr = bfd_h_get_32 (abfd, raw.addr);
2710 section->size = bfd_h_get_32 (abfd, raw.size);
2711 section->offset = bfd_h_get_32 (abfd, raw.offset);
2712 section->align = bfd_h_get_32 (abfd, raw.align);
2713 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2714 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2715 section->flags = bfd_h_get_32 (abfd, raw.flags);
2716 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2717 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2718 section->reserved3 = 0;
2719
2720 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2721
2722 return sec;
2723 }
2724
2725 static asection *
2726 bfd_mach_o_read_section_64 (bfd *abfd,
2727 unsigned int offset,
2728 unsigned long prot)
2729 {
2730 struct mach_o_section_64_external raw;
2731 asection *sec;
2732 bfd_mach_o_section *section;
2733
2734 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2735 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
2736 != BFD_MACH_O_SECTION_64_SIZE))
2737 return NULL;
2738
2739 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2740 if (sec == NULL)
2741 return NULL;
2742
2743 section = bfd_mach_o_get_mach_o_section (sec);
2744 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2745 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2746 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2747 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2748 section->addr = bfd_h_get_64 (abfd, raw.addr);
2749 section->size = bfd_h_get_64 (abfd, raw.size);
2750 section->offset = bfd_h_get_32 (abfd, raw.offset);
2751 section->align = bfd_h_get_32 (abfd, raw.align);
2752 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2753 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2754 section->flags = bfd_h_get_32 (abfd, raw.flags);
2755 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2756 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2757 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
2758
2759 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2760
2761 return sec;
2762 }
2763
2764 static asection *
2765 bfd_mach_o_read_section (bfd *abfd,
2766 unsigned int offset,
2767 unsigned long prot,
2768 unsigned int wide)
2769 {
2770 if (wide)
2771 return bfd_mach_o_read_section_64 (abfd, offset, prot);
2772 else
2773 return bfd_mach_o_read_section_32 (abfd, offset, prot);
2774 }
2775
2776 static bfd_boolean
2777 bfd_mach_o_read_symtab_symbol (bfd *abfd,
2778 bfd_mach_o_symtab_command *sym,
2779 bfd_mach_o_asymbol *s,
2780 unsigned long i)
2781 {
2782 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2783 unsigned int wide = mach_o_wide_p (&mdata->header);
2784 unsigned int symwidth =
2785 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2786 unsigned int symoff = sym->symoff + (i * symwidth);
2787 struct mach_o_nlist_64_external raw;
2788 unsigned char type = -1;
2789 unsigned char section = -1;
2790 short desc = -1;
2791 symvalue value = -1;
2792 unsigned long stroff = -1;
2793 unsigned int symtype = -1;
2794
2795 BFD_ASSERT (sym->strtab != NULL);
2796
2797 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
2798 || bfd_bread (&raw, symwidth, abfd) != symwidth)
2799 {
2800 (*_bfd_error_handler)
2801 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
2802 symwidth, (unsigned long) symoff);
2803 return FALSE;
2804 }
2805
2806 stroff = bfd_h_get_32 (abfd, raw.n_strx);
2807 type = bfd_h_get_8 (abfd, raw.n_type);
2808 symtype = type & BFD_MACH_O_N_TYPE;
2809 section = bfd_h_get_8 (abfd, raw.n_sect);
2810 desc = bfd_h_get_16 (abfd, raw.n_desc);
2811 if (wide)
2812 value = bfd_h_get_64 (abfd, raw.n_value);
2813 else
2814 value = bfd_h_get_32 (abfd, raw.n_value);
2815
2816 if (stroff >= sym->strsize)
2817 {
2818 (*_bfd_error_handler)
2819 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
2820 (unsigned long) stroff,
2821 (unsigned long) sym->strsize);
2822 return FALSE;
2823 }
2824
2825 s->symbol.the_bfd = abfd;
2826 s->symbol.name = sym->strtab + stroff;
2827 s->symbol.value = value;
2828 s->symbol.flags = 0x0;
2829 s->symbol.udata.i = i;
2830 s->n_type = type;
2831 s->n_sect = section;
2832 s->n_desc = desc;
2833
2834 if (type & BFD_MACH_O_N_STAB)
2835 {
2836 s->symbol.flags |= BSF_DEBUGGING;
2837 s->symbol.section = bfd_und_section_ptr;
2838 switch (type)
2839 {
2840 case N_FUN:
2841 case N_STSYM:
2842 case N_LCSYM:
2843 case N_BNSYM:
2844 case N_SLINE:
2845 case N_ENSYM:
2846 case N_ECOMM:
2847 case N_ECOML:
2848 case N_GSYM:
2849 if ((section > 0) && (section <= mdata->nsects))
2850 {
2851 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2852 s->symbol.value =
2853 s->symbol.value - mdata->sections[section - 1]->addr;
2854 }
2855 break;
2856 }
2857 }
2858 else
2859 {
2860 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
2861 s->symbol.flags |= BSF_GLOBAL;
2862 else
2863 s->symbol.flags |= BSF_LOCAL;
2864
2865 switch (symtype)
2866 {
2867 case BFD_MACH_O_N_UNDF:
2868 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
2869 && s->symbol.value != 0)
2870 {
2871 /* A common symbol. */
2872 s->symbol.section = bfd_com_section_ptr;
2873 s->symbol.flags = BSF_NO_FLAGS;
2874 }
2875 else
2876 {
2877 s->symbol.section = bfd_und_section_ptr;
2878 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
2879 s->symbol.flags |= BSF_WEAK;
2880 }
2881 break;
2882 case BFD_MACH_O_N_PBUD:
2883 s->symbol.section = bfd_und_section_ptr;
2884 break;
2885 case BFD_MACH_O_N_ABS:
2886 s->symbol.section = bfd_abs_section_ptr;
2887 break;
2888 case BFD_MACH_O_N_SECT:
2889 if ((section > 0) && (section <= mdata->nsects))
2890 {
2891 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2892 s->symbol.value =
2893 s->symbol.value - mdata->sections[section - 1]->addr;
2894 }
2895 else
2896 {
2897 /* Mach-O uses 0 to mean "no section"; not an error. */
2898 if (section != 0)
2899 {
2900 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
2901 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
2902 s->symbol.name, section, mdata->nsects);
2903 }
2904 s->symbol.section = bfd_und_section_ptr;
2905 }
2906 break;
2907 case BFD_MACH_O_N_INDR:
2908 /* FIXME: we don't follow the BFD convention as this indirect symbol
2909 won't be followed by the referenced one. This looks harmless
2910 unless we start using the linker. */
2911 s->symbol.flags |= BSF_INDIRECT;
2912 s->symbol.section = bfd_ind_section_ptr;
2913 s->symbol.value = 0;
2914 break;
2915 default:
2916 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
2917 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
2918 s->symbol.name, symtype);
2919 s->symbol.section = bfd_und_section_ptr;
2920 break;
2921 }
2922 }
2923
2924 return TRUE;
2925 }
2926
2927 bfd_boolean
2928 bfd_mach_o_read_symtab_strtab (bfd *abfd)
2929 {
2930 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2931 bfd_mach_o_symtab_command *sym = mdata->symtab;
2932
2933 /* Fail if there is no symtab. */
2934 if (sym == NULL)
2935 return FALSE;
2936
2937 /* Success if already loaded. */
2938 if (sym->strtab)
2939 return TRUE;
2940
2941 if (abfd->flags & BFD_IN_MEMORY)
2942 {
2943 struct bfd_in_memory *b;
2944
2945 b = (struct bfd_in_memory *) abfd->iostream;
2946
2947 if ((sym->stroff + sym->strsize) > b->size)
2948 {
2949 bfd_set_error (bfd_error_file_truncated);
2950 return FALSE;
2951 }
2952 sym->strtab = (char *) b->buffer + sym->stroff;
2953 }
2954 else
2955 {
2956 sym->strtab = bfd_alloc (abfd, sym->strsize);
2957 if (sym->strtab == NULL)
2958 return FALSE;
2959
2960 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
2961 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
2962 {
2963 bfd_set_error (bfd_error_file_truncated);
2964 return FALSE;
2965 }
2966 }
2967
2968 return TRUE;
2969 }
2970
2971 bfd_boolean
2972 bfd_mach_o_read_symtab_symbols (bfd *abfd)
2973 {
2974 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2975 bfd_mach_o_symtab_command *sym = mdata->symtab;
2976 unsigned long i;
2977
2978 if (sym == NULL || sym->symbols)
2979 {
2980 /* Return now if there are no symbols or if already loaded. */
2981 return TRUE;
2982 }
2983
2984 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
2985
2986 if (sym->symbols == NULL)
2987 {
2988 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
2989 return FALSE;
2990 }
2991
2992 if (!bfd_mach_o_read_symtab_strtab (abfd))
2993 return FALSE;
2994
2995 for (i = 0; i < sym->nsyms; i++)
2996 {
2997 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
2998 return FALSE;
2999 }
3000
3001 return TRUE;
3002 }
3003
3004 static const char *
3005 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3006 {
3007 switch ((int) flavour)
3008 {
3009 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3010 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3011 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3012 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3013 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3014 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3015 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3016 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3017 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3018 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3019 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3020 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3021 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3022 default: return "UNKNOWN";
3023 }
3024 }
3025
3026 static const char *
3027 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3028 {
3029 switch ((int) flavour)
3030 {
3031 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3032 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3033 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3034 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3035 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3036 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3037 default: return "UNKNOWN";
3038 }
3039 }
3040
3041 static int
3042 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3043 {
3044 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3045 struct mach_o_str_command_external raw;
3046 unsigned int nameoff;
3047
3048 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER)
3049 || (command->type == BFD_MACH_O_LC_LOAD_DYLINKER));
3050
3051 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3052 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3053 return -1;
3054
3055 nameoff = bfd_h_get_32 (abfd, raw.str);
3056
3057 cmd->name_offset = command->offset + nameoff;
3058 cmd->name_len = command->len - nameoff;
3059 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3060 if (cmd->name_str == NULL)
3061 return -1;
3062 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3063 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3064 return -1;
3065 return 0;
3066 }
3067
3068 static int
3069 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3070 {
3071 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3072 struct mach_o_dylib_command_external raw;
3073 unsigned int nameoff;
3074
3075 switch (command->type)
3076 {
3077 case BFD_MACH_O_LC_LOAD_DYLIB:
3078 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3079 case BFD_MACH_O_LC_ID_DYLIB:
3080 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3081 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3082 break;
3083 default:
3084 BFD_FAIL ();
3085 return -1;
3086 }
3087
3088 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3089 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3090 return -1;
3091
3092 nameoff = bfd_h_get_32 (abfd, raw.name);
3093 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3094 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3095 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3096
3097 cmd->name_offset = command->offset + nameoff;
3098 cmd->name_len = command->len - nameoff;
3099 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3100 if (cmd->name_str == NULL)
3101 return -1;
3102 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3103 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3104 return -1;
3105 return 0;
3106 }
3107
3108 static int
3109 bfd_mach_o_read_prebound_dylib (bfd *abfd ATTRIBUTE_UNUSED,
3110 bfd_mach_o_load_command *command ATTRIBUTE_UNUSED)
3111 {
3112 /* bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; */
3113
3114 BFD_ASSERT (command->type == BFD_MACH_O_LC_PREBOUND_DYLIB);
3115 return 0;
3116 }
3117
3118 static int
3119 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3120 {
3121 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3122 struct mach_o_fvmlib_command_external raw;
3123 unsigned int nameoff;
3124
3125 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3126 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3127 return -1;
3128
3129 nameoff = bfd_h_get_32 (abfd, raw.name);
3130 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3131 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3132
3133 fvm->name_offset = command->offset + nameoff;
3134 fvm->name_len = command->len - nameoff;
3135 fvm->name_str = bfd_alloc (abfd, fvm->name_len);
3136 if (fvm->name_str == NULL)
3137 return -1;
3138 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3139 || bfd_bread (fvm->name_str, fvm->name_len, abfd) != fvm->name_len)
3140 return -1;
3141 return 0;
3142 }
3143
3144 static int
3145 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3146 {
3147 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3148 bfd_mach_o_thread_command *cmd = &command->command.thread;
3149 unsigned int offset;
3150 unsigned int nflavours;
3151 unsigned int i;
3152
3153 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3154 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3155
3156 /* Count the number of threads. */
3157 offset = 8;
3158 nflavours = 0;
3159 while (offset != command->len)
3160 {
3161 struct mach_o_thread_command_external raw;
3162
3163 if (offset >= command->len)
3164 return -1;
3165
3166 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3167 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3168 return -1;
3169
3170 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3171 nflavours++;
3172 }
3173
3174 /* Allocate threads. */
3175 cmd->flavours = bfd_alloc
3176 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3177 if (cmd->flavours == NULL)
3178 return -1;
3179 cmd->nflavours = nflavours;
3180
3181 offset = 8;
3182 nflavours = 0;
3183 while (offset != command->len)
3184 {
3185 struct mach_o_thread_command_external raw;
3186
3187 if (offset >= command->len)
3188 return -1;
3189
3190 if (nflavours >= cmd->nflavours)
3191 return -1;
3192
3193 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3194 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3195 return -1;
3196
3197 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3198 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3199 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3200 offset += cmd->flavours[nflavours].size + sizeof (raw);
3201 nflavours++;
3202 }
3203
3204 for (i = 0; i < nflavours; i++)
3205 {
3206 asection *bfdsec;
3207 unsigned int snamelen;
3208 char *sname;
3209 const char *flavourstr;
3210 const char *prefix = "LC_THREAD";
3211 unsigned int j = 0;
3212
3213 switch (mdata->header.cputype)
3214 {
3215 case BFD_MACH_O_CPU_TYPE_POWERPC:
3216 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3217 flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3218 break;
3219 case BFD_MACH_O_CPU_TYPE_I386:
3220 case BFD_MACH_O_CPU_TYPE_X86_64:
3221 flavourstr = bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3222 break;
3223 default:
3224 flavourstr = "UNKNOWN_ARCHITECTURE";
3225 break;
3226 }
3227
3228 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3229 sname = bfd_alloc (abfd, snamelen);
3230 if (sname == NULL)
3231 return -1;
3232
3233 for (;;)
3234 {
3235 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3236 if (bfd_get_section_by_name (abfd, sname) == NULL)
3237 break;
3238 j++;
3239 }
3240
3241 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
3242
3243 bfdsec->vma = 0;
3244 bfdsec->lma = 0;
3245 bfdsec->size = cmd->flavours[i].size;
3246 bfdsec->filepos = cmd->flavours[i].offset;
3247 bfdsec->alignment_power = 0x0;
3248
3249 cmd->section = bfdsec;
3250 }
3251
3252 return 0;
3253 }
3254
3255 static int
3256 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
3257 {
3258 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
3259 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3260
3261 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
3262
3263 {
3264 struct mach_o_dysymtab_command_external raw;
3265
3266 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3267 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3268 return -1;
3269
3270 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
3271 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
3272 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
3273 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
3274 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
3275 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
3276 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
3277 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
3278 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
3279 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
3280 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
3281 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
3282 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
3283 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
3284 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
3285 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
3286 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
3287 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
3288 }
3289
3290 if (cmd->nmodtab != 0)
3291 {
3292 unsigned int i;
3293 int wide = bfd_mach_o_wide_p (abfd);
3294 unsigned int module_len = wide ? 56 : 52;
3295
3296 cmd->dylib_module =
3297 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
3298 if (cmd->dylib_module == NULL)
3299 return -1;
3300
3301 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
3302 return -1;
3303
3304 for (i = 0; i < cmd->nmodtab; i++)
3305 {
3306 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
3307 unsigned long v;
3308 unsigned char buf[56];
3309
3310 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
3311 return -1;
3312
3313 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
3314 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
3315 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
3316 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
3317 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
3318 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
3319 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
3320 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
3321 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
3322 v = bfd_h_get_32 (abfd, buf +36);
3323 module->iinit = v & 0xffff;
3324 module->iterm = (v >> 16) & 0xffff;
3325 v = bfd_h_get_32 (abfd, buf + 40);
3326 module->ninit = v & 0xffff;
3327 module->nterm = (v >> 16) & 0xffff;
3328 if (wide)
3329 {
3330 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
3331 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
3332 }
3333 else
3334 {
3335 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
3336 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
3337 }
3338 }
3339 }
3340
3341 if (cmd->ntoc != 0)
3342 {
3343 unsigned int i;
3344
3345 cmd->dylib_toc = bfd_alloc
3346 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
3347 if (cmd->dylib_toc == NULL)
3348 return -1;
3349
3350 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
3351 return -1;
3352
3353 for (i = 0; i < cmd->ntoc; i++)
3354 {
3355 struct mach_o_dylib_table_of_contents_external raw;
3356 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
3357
3358 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3359 return -1;
3360
3361 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
3362 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
3363 }
3364 }
3365
3366 if (cmd->nindirectsyms != 0)
3367 {
3368 unsigned int i;
3369
3370 cmd->indirect_syms = bfd_alloc
3371 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
3372 if (cmd->indirect_syms == NULL)
3373 return -1;
3374
3375 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
3376 return -1;
3377
3378 for (i = 0; i < cmd->nindirectsyms; i++)
3379 {
3380 unsigned char raw[4];
3381 unsigned int *is = &cmd->indirect_syms[i];
3382
3383 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3384 return -1;
3385
3386 *is = bfd_h_get_32 (abfd, raw);
3387 }
3388 }
3389
3390 if (cmd->nextrefsyms != 0)
3391 {
3392 unsigned long v;
3393 unsigned int i;
3394
3395 cmd->ext_refs = bfd_alloc
3396 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
3397 if (cmd->ext_refs == NULL)
3398 return -1;
3399
3400 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
3401 return -1;
3402
3403 for (i = 0; i < cmd->nextrefsyms; i++)
3404 {
3405 unsigned char raw[4];
3406 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
3407
3408 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3409 return -1;
3410
3411 /* Fields isym and flags are written as bit-fields, thus we need
3412 a specific processing for endianness. */
3413 v = bfd_h_get_32 (abfd, raw);
3414 if (bfd_big_endian (abfd))
3415 {
3416 ref->isym = (v >> 8) & 0xffffff;
3417 ref->flags = v & 0xff;
3418 }
3419 else
3420 {
3421 ref->isym = v & 0xffffff;
3422 ref->flags = (v >> 24) & 0xff;
3423 }
3424 }
3425 }
3426
3427 if (mdata->dysymtab)
3428 return -1;
3429 mdata->dysymtab = cmd;
3430
3431 return 0;
3432 }
3433
3434 static int
3435 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
3436 {
3437 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
3438 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3439 struct mach_o_symtab_command_external raw;
3440
3441 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
3442
3443 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3444 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3445 return -1;
3446
3447 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
3448 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
3449 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
3450 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
3451 symtab->symbols = NULL;
3452 symtab->strtab = NULL;
3453
3454 if (symtab->nsyms != 0)
3455 abfd->flags |= HAS_SYMS;
3456
3457 if (mdata->symtab)
3458 return -1;
3459 mdata->symtab = symtab;
3460 return 0;
3461 }
3462
3463 static int
3464 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
3465 {
3466 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
3467
3468 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
3469
3470 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3471 || bfd_bread (cmd->uuid, 16, abfd) != 16)
3472 return -1;
3473
3474 return 0;
3475 }
3476
3477 static int
3478 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
3479 {
3480 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
3481 struct mach_o_linkedit_data_command_external raw;
3482
3483 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3484 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3485 return -1;
3486
3487 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
3488 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
3489 return 0;
3490 }
3491
3492 static int
3493 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
3494 {
3495 bfd_mach_o_str_command *cmd = &command->command.str;
3496 struct mach_o_str_command_external raw;
3497 unsigned long off;
3498
3499 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3500 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3501 return -1;
3502
3503 off = bfd_get_32 (abfd, raw.str);
3504 cmd->stroff = command->offset + off;
3505 cmd->str_len = command->len - off;
3506 cmd->str = bfd_alloc (abfd, cmd->str_len);
3507 if (cmd->str == NULL)
3508 return -1;
3509 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
3510 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
3511 return -1;
3512 return 0;
3513 }
3514
3515 static int
3516 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
3517 {
3518 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
3519 struct mach_o_dyld_info_command_external raw;
3520
3521 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3522 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3523 return -1;
3524
3525 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
3526 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
3527 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
3528 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
3529 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
3530 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
3531 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
3532 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
3533 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
3534 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
3535 return 0;
3536 }
3537
3538 static bfd_boolean
3539 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
3540 {
3541 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
3542 struct mach_o_version_min_command_external raw;
3543 unsigned int ver;
3544
3545 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3546 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3547 return FALSE;
3548
3549 ver = bfd_get_32 (abfd, raw.version);
3550 cmd->rel = ver >> 16;
3551 cmd->maj = ver >> 8;
3552 cmd->min = ver;
3553 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
3554 return TRUE;
3555 }
3556
3557 static bfd_boolean
3558 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
3559 {
3560 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
3561 struct mach_o_encryption_info_command_external raw;
3562
3563 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3564 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3565 return FALSE;
3566
3567 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
3568 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
3569 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
3570 return TRUE;
3571 }
3572
3573 static int
3574 bfd_mach_o_read_segment (bfd *abfd,
3575 bfd_mach_o_load_command *command,
3576 unsigned int wide)
3577 {
3578 bfd_mach_o_segment_command *seg = &command->command.segment;
3579 unsigned long i;
3580
3581 if (wide)
3582 {
3583 struct mach_o_segment_command_64_external raw;
3584
3585 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
3586
3587 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3588 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3589 return -1;
3590
3591 memcpy (seg->segname, raw.segname, 16);
3592 seg->segname[16] = '\0';
3593
3594 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
3595 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
3596 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
3597 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
3598 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3599 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3600 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3601 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3602 }
3603 else
3604 {
3605 struct mach_o_segment_command_32_external raw;
3606
3607 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
3608
3609 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3610 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3611 return -1;
3612
3613 memcpy (seg->segname, raw.segname, 16);
3614 seg->segname[16] = '\0';
3615
3616 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
3617 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
3618 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
3619 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
3620 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3621 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3622 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3623 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3624 }
3625 seg->sect_head = NULL;
3626 seg->sect_tail = NULL;
3627
3628 for (i = 0; i < seg->nsects; i++)
3629 {
3630 bfd_vma segoff;
3631 asection *sec;
3632
3633 if (wide)
3634 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
3635 + (i * BFD_MACH_O_SECTION_64_SIZE);
3636 else
3637 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
3638 + (i * BFD_MACH_O_SECTION_SIZE);
3639
3640 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
3641 if (sec == NULL)
3642 return -1;
3643
3644 bfd_mach_o_append_section_to_segment (seg, sec);
3645 }
3646
3647 return 0;
3648 }
3649
3650 static int
3651 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
3652 {
3653 return bfd_mach_o_read_segment (abfd, command, 0);
3654 }
3655
3656 static int
3657 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
3658 {
3659 return bfd_mach_o_read_segment (abfd, command, 1);
3660 }
3661
3662 static int
3663 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
3664 {
3665 struct mach_o_load_command_external raw;
3666 unsigned int cmd;
3667
3668 /* Read command type and length. */
3669 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
3670 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
3671 return -1;
3672
3673 cmd = bfd_h_get_32 (abfd, raw.cmd);
3674 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
3675 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
3676 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
3677
3678 switch (command->type)
3679 {
3680 case BFD_MACH_O_LC_SEGMENT:
3681 if (bfd_mach_o_read_segment_32 (abfd, command) != 0)
3682 return -1;
3683 break;
3684 case BFD_MACH_O_LC_SEGMENT_64:
3685 if (bfd_mach_o_read_segment_64 (abfd, command) != 0)
3686 return -1;
3687 break;
3688 case BFD_MACH_O_LC_SYMTAB:
3689 if (bfd_mach_o_read_symtab (abfd, command) != 0)
3690 return -1;
3691 break;
3692 case BFD_MACH_O_LC_SYMSEG:
3693 break;
3694 case BFD_MACH_O_LC_THREAD:
3695 case BFD_MACH_O_LC_UNIXTHREAD:
3696 if (bfd_mach_o_read_thread (abfd, command) != 0)
3697 return -1;
3698 break;
3699 case BFD_MACH_O_LC_LOAD_DYLINKER:
3700 case BFD_MACH_O_LC_ID_DYLINKER:
3701 if (bfd_mach_o_read_dylinker (abfd, command) != 0)
3702 return -1;
3703 break;
3704 case BFD_MACH_O_LC_LOAD_DYLIB:
3705 case BFD_MACH_O_LC_ID_DYLIB:
3706 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3707 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3708 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3709 if (bfd_mach_o_read_dylib (abfd, command) != 0)
3710 return -1;
3711 break;
3712 case BFD_MACH_O_LC_PREBOUND_DYLIB:
3713 if (bfd_mach_o_read_prebound_dylib (abfd, command) != 0)
3714 return -1;
3715 break;
3716 case BFD_MACH_O_LC_LOADFVMLIB:
3717 case BFD_MACH_O_LC_IDFVMLIB:
3718 if (bfd_mach_o_read_fvmlib (abfd, command) != 0)
3719 return -1;
3720 break;
3721 case BFD_MACH_O_LC_IDENT:
3722 case BFD_MACH_O_LC_FVMFILE:
3723 case BFD_MACH_O_LC_PREPAGE:
3724 case BFD_MACH_O_LC_ROUTINES:
3725 case BFD_MACH_O_LC_ROUTINES_64:
3726 break;
3727 case BFD_MACH_O_LC_SUB_FRAMEWORK:
3728 case BFD_MACH_O_LC_SUB_UMBRELLA:
3729 case BFD_MACH_O_LC_SUB_LIBRARY:
3730 case BFD_MACH_O_LC_SUB_CLIENT:
3731 case BFD_MACH_O_LC_RPATH:
3732 if (bfd_mach_o_read_str (abfd, command) != 0)
3733 return -1;
3734 break;
3735 case BFD_MACH_O_LC_DYSYMTAB:
3736 if (bfd_mach_o_read_dysymtab (abfd, command) != 0)
3737 return -1;
3738 break;
3739 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
3740 case BFD_MACH_O_LC_PREBIND_CKSUM:
3741 break;
3742 case BFD_MACH_O_LC_UUID:
3743 if (bfd_mach_o_read_uuid (abfd, command) != 0)
3744 return -1;
3745 break;
3746 case BFD_MACH_O_LC_CODE_SIGNATURE:
3747 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
3748 case BFD_MACH_O_LC_FUNCTION_STARTS:
3749 if (bfd_mach_o_read_linkedit (abfd, command) != 0)
3750 return -1;
3751 break;
3752 case BFD_MACH_O_LC_ENCRYPTION_INFO:
3753 if (!bfd_mach_o_read_encryption_info (abfd, command))
3754 return -1;
3755 break;
3756 case BFD_MACH_O_LC_DYLD_INFO:
3757 if (bfd_mach_o_read_dyld_info (abfd, command) != 0)
3758 return -1;
3759 break;
3760 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
3761 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
3762 if (!bfd_mach_o_read_version_min (abfd, command))
3763 return -1;
3764 break;
3765 default:
3766 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
3767 abfd, (unsigned long) command->type);
3768 break;
3769 }
3770
3771 return 0;
3772 }
3773
3774 static void
3775 bfd_mach_o_flatten_sections (bfd *abfd)
3776 {
3777 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3778 long csect = 0;
3779 unsigned long i;
3780
3781 /* Count total number of sections. */
3782 mdata->nsects = 0;
3783
3784 for (i = 0; i < mdata->header.ncmds; i++)
3785 {
3786 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
3787 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
3788 {
3789 bfd_mach_o_segment_command *seg;
3790
3791 seg = &mdata->commands[i].command.segment;
3792 mdata->nsects += seg->nsects;
3793 }
3794 }
3795
3796 /* Allocate sections array. */
3797 mdata->sections = bfd_alloc (abfd,
3798 mdata->nsects * sizeof (bfd_mach_o_section *));
3799
3800 /* Fill the array. */
3801 csect = 0;
3802
3803 for (i = 0; i < mdata->header.ncmds; i++)
3804 {
3805 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
3806 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
3807 {
3808 bfd_mach_o_segment_command *seg;
3809 bfd_mach_o_section *sec;
3810
3811 seg = &mdata->commands[i].command.segment;
3812 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
3813
3814 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
3815 mdata->sections[csect++] = sec;
3816 }
3817 }
3818 }
3819
3820 static bfd_boolean
3821 bfd_mach_o_scan_start_address (bfd *abfd)
3822 {
3823 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3824 bfd_mach_o_thread_command *cmd = NULL;
3825 unsigned long i;
3826
3827 for (i = 0; i < mdata->header.ncmds; i++)
3828 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
3829 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
3830 {
3831 cmd = &mdata->commands[i].command.thread;
3832 break;
3833 }
3834
3835 if (cmd == NULL)
3836 return FALSE;
3837
3838 /* FIXME: create a subtarget hook ? */
3839 for (i = 0; i < cmd->nflavours; i++)
3840 {
3841 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
3842 && (cmd->flavours[i].flavour
3843 == (unsigned long) BFD_MACH_O_x86_THREAD_STATE32))
3844 {
3845 unsigned char buf[4];
3846
3847 if (bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET) != 0
3848 || bfd_bread (buf, 4, abfd) != 4)
3849 return FALSE;
3850
3851 abfd->start_address = bfd_h_get_32 (abfd, buf);
3852 }
3853 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
3854 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
3855 {
3856 unsigned char buf[4];
3857
3858 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
3859 || bfd_bread (buf, 4, abfd) != 4)
3860 return FALSE;
3861
3862 abfd->start_address = bfd_h_get_32 (abfd, buf);
3863 }
3864 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
3865 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
3866 {
3867 unsigned char buf[8];
3868
3869 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
3870 || bfd_bread (buf, 8, abfd) != 8)
3871 return FALSE;
3872
3873 abfd->start_address = bfd_h_get_64 (abfd, buf);
3874 }
3875 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
3876 && (cmd->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
3877 {
3878 unsigned char buf[8];
3879
3880 if (bfd_seek (abfd, cmd->flavours[i].offset + (16 * 8), SEEK_SET) != 0
3881 || bfd_bread (buf, 8, abfd) != 8)
3882 return FALSE;
3883
3884 abfd->start_address = bfd_h_get_64 (abfd, buf);
3885 }
3886 }
3887
3888 return TRUE;
3889 }
3890
3891 bfd_boolean
3892 bfd_mach_o_set_arch_mach (bfd *abfd,
3893 enum bfd_architecture arch,
3894 unsigned long machine)
3895 {
3896 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
3897
3898 /* If this isn't the right architecture for this backend, and this
3899 isn't the generic backend, fail. */
3900 if (arch != bed->arch
3901 && arch != bfd_arch_unknown
3902 && bed->arch != bfd_arch_unknown)
3903 return FALSE;
3904
3905 return bfd_default_set_arch_mach (abfd, arch, machine);
3906 }
3907
3908 static bfd_boolean
3909 bfd_mach_o_scan (bfd *abfd,
3910 bfd_mach_o_header *header,
3911 bfd_mach_o_data_struct *mdata)
3912 {
3913 unsigned int i;
3914 enum bfd_architecture cputype;
3915 unsigned long cpusubtype;
3916 unsigned int hdrsize;
3917
3918 hdrsize = mach_o_wide_p (header) ?
3919 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3920
3921 mdata->header = *header;
3922
3923 abfd->flags = abfd->flags & BFD_IN_MEMORY;
3924 switch (header->filetype)
3925 {
3926 case BFD_MACH_O_MH_OBJECT:
3927 abfd->flags |= HAS_RELOC;
3928 break;
3929 case BFD_MACH_O_MH_EXECUTE:
3930 abfd->flags |= EXEC_P;
3931 break;
3932 case BFD_MACH_O_MH_DYLIB:
3933 case BFD_MACH_O_MH_BUNDLE:
3934 abfd->flags |= DYNAMIC;
3935 break;
3936 }
3937
3938 abfd->tdata.mach_o_data = mdata;
3939
3940 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
3941 &cputype, &cpusubtype);
3942 if (cputype == bfd_arch_unknown)
3943 {
3944 (*_bfd_error_handler)
3945 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
3946 header->cputype, header->cpusubtype);
3947 return FALSE;
3948 }
3949
3950 bfd_set_arch_mach (abfd, cputype, cpusubtype);
3951
3952 if (header->ncmds != 0)
3953 {
3954 mdata->commands = bfd_alloc
3955 (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
3956 if (mdata->commands == NULL)
3957 return FALSE;
3958
3959 for (i = 0; i < header->ncmds; i++)
3960 {
3961 bfd_mach_o_load_command *cur = &mdata->commands[i];
3962
3963 if (i == 0)
3964 cur->offset = hdrsize;
3965 else
3966 {
3967 bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
3968 cur->offset = prev->offset + prev->len;
3969 }
3970
3971 if (bfd_mach_o_read_command (abfd, cur) < 0)
3972 return FALSE;
3973 }
3974 }
3975
3976 if (bfd_mach_o_scan_start_address (abfd) < 0)
3977 return FALSE;
3978
3979 bfd_mach_o_flatten_sections (abfd);
3980 return TRUE;
3981 }
3982
3983 bfd_boolean
3984 bfd_mach_o_mkobject_init (bfd *abfd)
3985 {
3986 bfd_mach_o_data_struct *mdata = NULL;
3987
3988 mdata = bfd_alloc (abfd, sizeof (bfd_mach_o_data_struct));
3989 if (mdata == NULL)
3990 return FALSE;
3991 abfd->tdata.mach_o_data = mdata;
3992
3993 mdata->header.magic = 0;
3994 mdata->header.cputype = 0;
3995 mdata->header.cpusubtype = 0;
3996 mdata->header.filetype = 0;
3997 mdata->header.ncmds = 0;
3998 mdata->header.sizeofcmds = 0;
3999 mdata->header.flags = 0;
4000 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4001 mdata->commands = NULL;
4002 mdata->nsects = 0;
4003 mdata->sections = NULL;
4004 mdata->dyn_reloc_cache = NULL;
4005
4006 return TRUE;
4007 }
4008
4009 static bfd_boolean
4010 bfd_mach_o_gen_mkobject (bfd *abfd)
4011 {
4012 bfd_mach_o_data_struct *mdata;
4013
4014 if (!bfd_mach_o_mkobject_init (abfd))
4015 return FALSE;
4016
4017 mdata = bfd_mach_o_get_data (abfd);
4018 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4019 mdata->header.cputype = 0;
4020 mdata->header.cpusubtype = 0;
4021 mdata->header.byteorder = abfd->xvec->byteorder;
4022 mdata->header.version = 1;
4023
4024 return TRUE;
4025 }
4026
4027 const bfd_target *
4028 bfd_mach_o_header_p (bfd *abfd,
4029 bfd_mach_o_filetype filetype,
4030 bfd_mach_o_cpu_type cputype)
4031 {
4032 struct bfd_preserve preserve;
4033 bfd_mach_o_header header;
4034
4035 preserve.marker = NULL;
4036 if (!bfd_mach_o_read_header (abfd, &header))
4037 goto wrong;
4038
4039 if (! (header.byteorder == BFD_ENDIAN_BIG
4040 || header.byteorder == BFD_ENDIAN_LITTLE))
4041 {
4042 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4043 (unsigned long) header.byteorder);
4044 goto wrong;
4045 }
4046
4047 if (! ((header.byteorder == BFD_ENDIAN_BIG
4048 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4049 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4050 || (header.byteorder == BFD_ENDIAN_LITTLE
4051 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4052 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4053 goto wrong;
4054
4055 /* Check cputype and filetype.
4056 In case of wildcard, do not accept magics that are handled by existing
4057 targets. */
4058 if (cputype)
4059 {
4060 if (header.cputype != cputype)
4061 goto wrong;
4062 }
4063
4064 if (filetype)
4065 {
4066 if (header.filetype != filetype)
4067 goto wrong;
4068 }
4069 else
4070 {
4071 switch (header.filetype)
4072 {
4073 case BFD_MACH_O_MH_CORE:
4074 /* Handled by core_p */
4075 goto wrong;
4076 default:
4077 break;
4078 }
4079 }
4080
4081 preserve.marker = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4082 if (preserve.marker == NULL
4083 || !bfd_preserve_save (abfd, &preserve))
4084 goto fail;
4085
4086 if (!bfd_mach_o_scan (abfd, &header,
4087 (bfd_mach_o_data_struct *) preserve.marker))
4088 goto wrong;
4089
4090 bfd_preserve_finish (abfd, &preserve);
4091 return abfd->xvec;
4092
4093 wrong:
4094 bfd_set_error (bfd_error_wrong_format);
4095
4096 fail:
4097 if (preserve.marker != NULL)
4098 bfd_preserve_restore (abfd, &preserve);
4099 return NULL;
4100 }
4101
4102 static const bfd_target *
4103 bfd_mach_o_gen_object_p (bfd *abfd)
4104 {
4105 return bfd_mach_o_header_p (abfd, 0, 0);
4106 }
4107
4108 static const bfd_target *
4109 bfd_mach_o_gen_core_p (bfd *abfd)
4110 {
4111 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
4112 }
4113
4114 typedef struct mach_o_fat_archentry
4115 {
4116 unsigned long cputype;
4117 unsigned long cpusubtype;
4118 unsigned long offset;
4119 unsigned long size;
4120 unsigned long align;
4121 } mach_o_fat_archentry;
4122
4123 typedef struct mach_o_fat_data_struct
4124 {
4125 unsigned long magic;
4126 unsigned long nfat_arch;
4127 mach_o_fat_archentry *archentries;
4128 } mach_o_fat_data_struct;
4129
4130 const bfd_target *
4131 bfd_mach_o_archive_p (bfd *abfd)
4132 {
4133 mach_o_fat_data_struct *adata = NULL;
4134 struct mach_o_fat_header_external hdr;
4135 unsigned long i;
4136
4137 if (bfd_seek (abfd, 0, SEEK_SET) != 0
4138 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
4139 goto error;
4140
4141 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
4142 if (adata == NULL)
4143 goto error;
4144
4145 adata->magic = bfd_getb32 (hdr.magic);
4146 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
4147 if (adata->magic != 0xcafebabe)
4148 goto error;
4149 /* Avoid matching Java bytecode files, which have the same magic number.
4150 In the Java bytecode file format this field contains the JVM version,
4151 which starts at 43.0. */
4152 if (adata->nfat_arch > 30)
4153 goto error;
4154
4155 adata->archentries =
4156 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
4157 if (adata->archentries == NULL)
4158 goto error;
4159
4160 for (i = 0; i < adata->nfat_arch; i++)
4161 {
4162 struct mach_o_fat_arch_external arch;
4163 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
4164 goto error;
4165 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
4166 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
4167 adata->archentries[i].offset = bfd_getb32 (arch.offset);
4168 adata->archentries[i].size = bfd_getb32 (arch.size);
4169 adata->archentries[i].align = bfd_getb32 (arch.align);
4170 }
4171
4172 abfd->tdata.mach_o_fat_data = adata;
4173 return abfd->xvec;
4174
4175 error:
4176 if (adata != NULL)
4177 bfd_release (abfd, adata);
4178 bfd_set_error (bfd_error_wrong_format);
4179 return NULL;
4180 }
4181
4182 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
4183 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
4184 Set arelt_data and origin fields too. */
4185
4186 static void
4187 bfd_mach_o_fat_member_init (bfd *abfd,
4188 enum bfd_architecture arch_type,
4189 unsigned long arch_subtype,
4190 mach_o_fat_archentry *entry)
4191 {
4192 struct areltdata *areltdata;
4193 /* Create the member filename. Use ARCH_NAME. */
4194 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
4195
4196 if (ap)
4197 {
4198 /* Use the architecture name if known. */
4199 abfd->filename = ap->printable_name;
4200 }
4201 else
4202 {
4203 /* Forge a uniq id. */
4204 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
4205 char *name = bfd_alloc (abfd, namelen);
4206 snprintf (name, namelen, "0x%lx-0x%lx",
4207 entry->cputype, entry->cpusubtype);
4208 abfd->filename = name;
4209 }
4210
4211 areltdata = bfd_zalloc (abfd, sizeof (struct areltdata));
4212 areltdata->parsed_size = entry->size;
4213 abfd->arelt_data = areltdata;
4214 abfd->iostream = NULL;
4215 abfd->origin = entry->offset;
4216 }
4217
4218 bfd *
4219 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
4220 {
4221 mach_o_fat_data_struct *adata;
4222 mach_o_fat_archentry *entry = NULL;
4223 unsigned long i;
4224 bfd *nbfd;
4225 enum bfd_architecture arch_type;
4226 unsigned long arch_subtype;
4227
4228 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
4229 BFD_ASSERT (adata != NULL);
4230
4231 /* Find index of previous entry. */
4232 if (prev == NULL)
4233 {
4234 /* Start at first one. */
4235 i = 0;
4236 }
4237 else
4238 {
4239 /* Find index of PREV. */
4240 for (i = 0; i < adata->nfat_arch; i++)
4241 {
4242 if (adata->archentries[i].offset == prev->origin)
4243 break;
4244 }
4245
4246 if (i == adata->nfat_arch)
4247 {
4248 /* Not found. */
4249 bfd_set_error (bfd_error_bad_value);
4250 return NULL;
4251 }
4252
4253 /* Get next entry. */
4254 i++;
4255 }
4256
4257 if (i >= adata->nfat_arch)
4258 {
4259 bfd_set_error (bfd_error_no_more_archived_files);
4260 return NULL;
4261 }
4262
4263 entry = &adata->archentries[i];
4264 nbfd = _bfd_new_bfd_contained_in (archive);
4265 if (nbfd == NULL)
4266 return NULL;
4267
4268 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
4269 &arch_type, &arch_subtype);
4270
4271 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
4272
4273 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
4274
4275 return nbfd;
4276 }
4277
4278 /* Analogous to stat call. */
4279
4280 static int
4281 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
4282 {
4283 if (abfd->arelt_data == NULL)
4284 {
4285 bfd_set_error (bfd_error_invalid_operation);
4286 return -1;
4287 }
4288
4289 buf->st_mtime = 0;
4290 buf->st_uid = 0;
4291 buf->st_gid = 0;
4292 buf->st_mode = 0644;
4293 buf->st_size = arelt_size (abfd);
4294
4295 return 0;
4296 }
4297
4298 /* If ABFD format is FORMAT and architecture is ARCH, return it.
4299 If ABFD is a fat image containing a member that corresponds to FORMAT
4300 and ARCH, returns it.
4301 In other case, returns NULL.
4302 This function allows transparent uses of fat images. */
4303
4304 bfd *
4305 bfd_mach_o_fat_extract (bfd *abfd,
4306 bfd_format format,
4307 const bfd_arch_info_type *arch)
4308 {
4309 bfd *res;
4310 mach_o_fat_data_struct *adata;
4311 unsigned int i;
4312
4313 if (bfd_check_format (abfd, format))
4314 {
4315 if (bfd_get_arch_info (abfd) == arch)
4316 return abfd;
4317 return NULL;
4318 }
4319 if (!bfd_check_format (abfd, bfd_archive)
4320 || abfd->xvec != &mach_o_fat_vec)
4321 return NULL;
4322
4323 /* This is a Mach-O fat image. */
4324 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
4325 BFD_ASSERT (adata != NULL);
4326
4327 for (i = 0; i < adata->nfat_arch; i++)
4328 {
4329 struct mach_o_fat_archentry *e = &adata->archentries[i];
4330 enum bfd_architecture cpu_type;
4331 unsigned long cpu_subtype;
4332
4333 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
4334 &cpu_type, &cpu_subtype);
4335 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
4336 continue;
4337
4338 /* The architecture is found. */
4339 res = _bfd_new_bfd_contained_in (abfd);
4340 if (res == NULL)
4341 return NULL;
4342
4343 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
4344
4345 if (bfd_check_format (res, format))
4346 {
4347 BFD_ASSERT (bfd_get_arch_info (res) == arch);
4348 return res;
4349 }
4350 bfd_close (res);
4351 return NULL;
4352 }
4353
4354 return NULL;
4355 }
4356
4357 int
4358 bfd_mach_o_lookup_command (bfd *abfd,
4359 bfd_mach_o_load_command_type type,
4360 bfd_mach_o_load_command **mcommand)
4361 {
4362 struct mach_o_data_struct *md = bfd_mach_o_get_data (abfd);
4363 bfd_mach_o_load_command *ncmd = NULL;
4364 unsigned int i, num;
4365
4366 BFD_ASSERT (md != NULL);
4367 BFD_ASSERT (mcommand != NULL);
4368
4369 num = 0;
4370 for (i = 0; i < md->header.ncmds; i++)
4371 {
4372 struct bfd_mach_o_load_command *cmd = &md->commands[i];
4373
4374 if (cmd->type != type)
4375 continue;
4376
4377 if (num == 0)
4378 ncmd = cmd;
4379 num++;
4380 }
4381
4382 *mcommand = ncmd;
4383 return num;
4384 }
4385
4386 unsigned long
4387 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
4388 {
4389 switch (type)
4390 {
4391 case BFD_MACH_O_CPU_TYPE_MC680x0:
4392 return 0x04000000;
4393 case BFD_MACH_O_CPU_TYPE_MC88000:
4394 return 0xffffe000;
4395 case BFD_MACH_O_CPU_TYPE_POWERPC:
4396 return 0xc0000000;
4397 case BFD_MACH_O_CPU_TYPE_I386:
4398 return 0xc0000000;
4399 case BFD_MACH_O_CPU_TYPE_SPARC:
4400 return 0xf0000000;
4401 case BFD_MACH_O_CPU_TYPE_I860:
4402 return 0;
4403 case BFD_MACH_O_CPU_TYPE_HPPA:
4404 return 0xc0000000 - 0x04000000;
4405 default:
4406 return 0;
4407 }
4408 }
4409
4410 /* The following two tables should be kept, as far as possible, in order of
4411 most frequently used entries to optimize their use from gas. */
4412
4413 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
4414 {
4415 { "regular", BFD_MACH_O_S_REGULAR},
4416 { "coalesced", BFD_MACH_O_S_COALESCED},
4417 { "zerofill", BFD_MACH_O_S_ZEROFILL},
4418 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
4419 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
4420 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
4421 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
4422 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
4423 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
4424 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
4425 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
4426 { "interposing", BFD_MACH_O_S_INTERPOSING},
4427 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
4428 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
4429 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
4430 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
4431 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
4432 { NULL, 0}
4433 };
4434
4435 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
4436 {
4437 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
4438 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
4439 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
4440 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
4441 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
4442 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
4443 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
4444 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
4445 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
4446 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4447 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4448 { NULL, 0}
4449 };
4450
4451 /* Get the section type from NAME. Return 256 if NAME is unknown. */
4452
4453 unsigned int
4454 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
4455 {
4456 const bfd_mach_o_xlat_name *x;
4457 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4458
4459 for (x = bfd_mach_o_section_type_name; x->name; x++)
4460 if (strcmp (x->name, name) == 0)
4461 {
4462 /* We found it... does the target support it? */
4463 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
4464 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
4465 return x->val; /* OK. */
4466 else
4467 break; /* Not supported. */
4468 }
4469 /* Maximum section ID = 0xff. */
4470 return 256;
4471 }
4472
4473 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
4474
4475 unsigned int
4476 bfd_mach_o_get_section_attribute_from_name (const char *name)
4477 {
4478 const bfd_mach_o_xlat_name *x;
4479
4480 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
4481 if (strcmp (x->name, name) == 0)
4482 return x->val;
4483 return (unsigned int)-1;
4484 }
4485
4486 int
4487 bfd_mach_o_core_fetch_environment (bfd *abfd,
4488 unsigned char **rbuf,
4489 unsigned int *rlen)
4490 {
4491 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4492 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
4493 unsigned int i = 0;
4494
4495 for (i = 0; i < mdata->header.ncmds; i++)
4496 {
4497 bfd_mach_o_load_command *cur = &mdata->commands[i];
4498 bfd_mach_o_segment_command *seg = NULL;
4499
4500 if (cur->type != BFD_MACH_O_LC_SEGMENT)
4501 continue;
4502
4503 seg = &cur->command.segment;
4504
4505 if ((seg->vmaddr + seg->vmsize) == stackaddr)
4506 {
4507 unsigned long start = seg->fileoff;
4508 unsigned long end = seg->fileoff + seg->filesize;
4509 unsigned char *buf = bfd_malloc (1024);
4510 unsigned long size = 1024;
4511
4512 for (;;)
4513 {
4514 bfd_size_type nread = 0;
4515 unsigned long offset;
4516 int found_nonnull = 0;
4517
4518 if (size > (end - start))
4519 size = (end - start);
4520
4521 buf = bfd_realloc_or_free (buf, size);
4522 if (buf == NULL)
4523 return -1;
4524
4525 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
4526 {
4527 free (buf);
4528 return -1;
4529 }
4530
4531 nread = bfd_bread (buf, size, abfd);
4532
4533 if (nread != size)
4534 {
4535 free (buf);
4536 return -1;
4537 }
4538
4539 for (offset = 4; offset <= size; offset += 4)
4540 {
4541 unsigned long val;
4542
4543 val = *((unsigned long *) (buf + size - offset));
4544 if (! found_nonnull)
4545 {
4546 if (val != 0)
4547 found_nonnull = 1;
4548 }
4549 else if (val == 0x0)
4550 {
4551 unsigned long bottom;
4552 unsigned long top;
4553
4554 bottom = seg->fileoff + seg->filesize - offset;
4555 top = seg->fileoff + seg->filesize - 4;
4556 *rbuf = bfd_malloc (top - bottom);
4557 *rlen = top - bottom;
4558
4559 memcpy (*rbuf, buf + size - *rlen, *rlen);
4560 free (buf);
4561 return 0;
4562 }
4563 }
4564
4565 if (size == (end - start))
4566 break;
4567
4568 size *= 2;
4569 }
4570
4571 free (buf);
4572 }
4573 }
4574
4575 return -1;
4576 }
4577
4578 char *
4579 bfd_mach_o_core_file_failing_command (bfd *abfd)
4580 {
4581 unsigned char *buf = NULL;
4582 unsigned int len = 0;
4583 int ret = -1;
4584
4585 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
4586 if (ret < 0)
4587 return NULL;
4588
4589 return (char *) buf;
4590 }
4591
4592 int
4593 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
4594 {
4595 return 0;
4596 }
4597
4598 static bfd_mach_o_uuid_command *
4599 bfd_mach_o_lookup_uuid_command (bfd *abfd)
4600 {
4601 bfd_mach_o_load_command *uuid_cmd;
4602 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
4603 if (ncmd != 1)
4604 return FALSE;
4605 return &uuid_cmd->command.uuid;
4606 }
4607
4608 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
4609
4610 static bfd_boolean
4611 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
4612 {
4613 bfd_mach_o_uuid_command *dsym_uuid_cmd;
4614
4615 BFD_ASSERT (abfd);
4616 BFD_ASSERT (uuid_cmd);
4617
4618 if (!bfd_check_format (abfd, bfd_object))
4619 return FALSE;
4620
4621 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
4622 || bfd_mach_o_get_data (abfd) == NULL
4623 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
4624 return FALSE;
4625
4626 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4627 if (dsym_uuid_cmd == NULL)
4628 return FALSE;
4629
4630 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
4631 sizeof (uuid_cmd->uuid)) != 0)
4632 return FALSE;
4633
4634 return TRUE;
4635 }
4636
4637 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
4638 The caller is responsible for closing the returned BFD object and
4639 its my_archive if the returned BFD is in a fat dSYM. */
4640
4641 static bfd *
4642 bfd_mach_o_find_dsym (const char *dsym_filename,
4643 const bfd_mach_o_uuid_command *uuid_cmd,
4644 const bfd_arch_info_type *arch)
4645 {
4646 bfd *base_dsym_bfd, *dsym_bfd;
4647
4648 BFD_ASSERT (uuid_cmd);
4649
4650 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
4651 if (base_dsym_bfd == NULL)
4652 return NULL;
4653
4654 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
4655 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
4656 return dsym_bfd;
4657
4658 bfd_close (dsym_bfd);
4659 if (base_dsym_bfd != dsym_bfd)
4660 bfd_close (base_dsym_bfd);
4661
4662 return NULL;
4663 }
4664
4665 /* Return a BFD created from a dSYM file for ABFD.
4666 The caller is responsible for closing the returned BFD object, its
4667 filename, and its my_archive if the returned BFD is in a fat dSYM. */
4668
4669 static bfd *
4670 bfd_mach_o_follow_dsym (bfd *abfd)
4671 {
4672 char *dsym_filename;
4673 bfd_mach_o_uuid_command *uuid_cmd;
4674 bfd *dsym_bfd, *base_bfd = abfd;
4675 const char *base_basename;
4676
4677 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
4678 return NULL;
4679
4680 if (abfd->my_archive)
4681 base_bfd = abfd->my_archive;
4682 /* BFD may have been opened from a stream. */
4683 if (base_bfd->filename == NULL)
4684 {
4685 bfd_set_error (bfd_error_invalid_operation);
4686 return NULL;
4687 }
4688 base_basename = lbasename (base_bfd->filename);
4689
4690 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4691 if (uuid_cmd == NULL)
4692 return NULL;
4693
4694 /* TODO: We assume the DWARF file has the same as the binary's.
4695 It seems apple's GDB checks all files in the dSYM bundle directory.
4696 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
4697 */
4698 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
4699 + strlen (dsym_subdir) + 1
4700 + strlen (base_basename) + 1);
4701 sprintf (dsym_filename, "%s%s/%s",
4702 base_bfd->filename, dsym_subdir, base_basename);
4703
4704 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
4705 bfd_get_arch_info (abfd));
4706 if (dsym_bfd == NULL)
4707 free (dsym_filename);
4708
4709 return dsym_bfd;
4710 }
4711
4712 bfd_boolean
4713 bfd_mach_o_find_nearest_line (bfd *abfd,
4714 asection *section,
4715 asymbol **symbols,
4716 bfd_vma offset,
4717 const char **filename_ptr,
4718 const char **functionname_ptr,
4719 unsigned int *line_ptr)
4720 {
4721 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4722 if (mdata == NULL)
4723 return FALSE;
4724 switch (mdata->header.filetype)
4725 {
4726 case BFD_MACH_O_MH_OBJECT:
4727 break;
4728 case BFD_MACH_O_MH_EXECUTE:
4729 case BFD_MACH_O_MH_DYLIB:
4730 case BFD_MACH_O_MH_BUNDLE:
4731 case BFD_MACH_O_MH_KEXT_BUNDLE:
4732 if (mdata->dwarf2_find_line_info == NULL)
4733 {
4734 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
4735 /* When we couldn't find dSYM for this binary, we look for
4736 the debug information in the binary itself. In this way,
4737 we won't try finding separated dSYM again because
4738 mdata->dwarf2_find_line_info will be filled. */
4739 if (! mdata->dsym_bfd)
4740 break;
4741 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
4742 dwarf_debug_sections, symbols,
4743 &mdata->dwarf2_find_line_info))
4744 return FALSE;
4745 }
4746 break;
4747 default:
4748 return FALSE;
4749 }
4750 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
4751 section, symbols, offset,
4752 filename_ptr, functionname_ptr,
4753 line_ptr, 0,
4754 &mdata->dwarf2_find_line_info))
4755 return TRUE;
4756 return FALSE;
4757 }
4758
4759 bfd_boolean
4760 bfd_mach_o_close_and_cleanup (bfd *abfd)
4761 {
4762 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4763 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
4764 {
4765 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
4766 bfd_mach_o_free_cached_info (abfd);
4767 if (mdata->dsym_bfd != NULL)
4768 {
4769 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
4770 char *dsym_filename = (char *)(fat_bfd
4771 ? fat_bfd->filename
4772 : mdata->dsym_bfd->filename);
4773 bfd_close (mdata->dsym_bfd);
4774 mdata->dsym_bfd = NULL;
4775 if (fat_bfd)
4776 bfd_close (fat_bfd);
4777 free (dsym_filename);
4778 }
4779 }
4780
4781 return _bfd_generic_close_and_cleanup (abfd);
4782 }
4783
4784 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
4785 {
4786 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4787 asection *asect;
4788 free (mdata->dyn_reloc_cache);
4789 mdata->dyn_reloc_cache = NULL;
4790 for (asect = abfd->sections; asect != NULL; asect = asect->next)
4791 {
4792 free (asect->relocation);
4793 asect->relocation = NULL;
4794 }
4795
4796 return TRUE;
4797 }
4798
4799 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
4800 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
4801
4802 #define bfd_mach_o_swap_reloc_in NULL
4803 #define bfd_mach_o_swap_reloc_out NULL
4804 #define bfd_mach_o_print_thread NULL
4805 #define bfd_mach_o_tgt_seg_table NULL
4806 #define bfd_mach_o_section_type_valid_for_tgt NULL
4807
4808 #define TARGET_NAME mach_o_be_vec
4809 #define TARGET_STRING "mach-o-be"
4810 #define TARGET_ARCHITECTURE bfd_arch_unknown
4811 #define TARGET_BIG_ENDIAN 1
4812 #define TARGET_ARCHIVE 0
4813 #define TARGET_PRIORITY 1
4814 #include "mach-o-target.c"
4815
4816 #undef TARGET_NAME
4817 #undef TARGET_STRING
4818 #undef TARGET_ARCHITECTURE
4819 #undef TARGET_BIG_ENDIAN
4820 #undef TARGET_ARCHIVE
4821 #undef TARGET_PRIORITY
4822
4823 #define TARGET_NAME mach_o_le_vec
4824 #define TARGET_STRING "mach-o-le"
4825 #define TARGET_ARCHITECTURE bfd_arch_unknown
4826 #define TARGET_BIG_ENDIAN 0
4827 #define TARGET_ARCHIVE 0
4828 #define TARGET_PRIORITY 1
4829
4830 #include "mach-o-target.c"
4831
4832 #undef TARGET_NAME
4833 #undef TARGET_STRING
4834 #undef TARGET_ARCHITECTURE
4835 #undef TARGET_BIG_ENDIAN
4836 #undef TARGET_ARCHIVE
4837 #undef TARGET_PRIORITY
4838
4839 /* Not yet handled: creating an archive. */
4840 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
4841
4842 /* Not used. */
4843 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
4844 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
4845 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
4846 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
4847 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
4848 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
4849 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
4850 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
4851 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
4852 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
4853
4854 #define TARGET_NAME mach_o_fat_vec
4855 #define TARGET_STRING "mach-o-fat"
4856 #define TARGET_ARCHITECTURE bfd_arch_unknown
4857 #define TARGET_BIG_ENDIAN 1
4858 #define TARGET_ARCHIVE 1
4859 #define TARGET_PRIORITY 0
4860
4861 #include "mach-o-target.c"
4862
4863 #undef TARGET_NAME
4864 #undef TARGET_STRING
4865 #undef TARGET_ARCHITECTURE
4866 #undef TARGET_BIG_ENDIAN
4867 #undef TARGET_ARCHIVE
4868 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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