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2012-07-24 Teresa Johnson <tejohnson@google.com>
[thirdparty/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 /* In addition to the need to byte-swap the symbol number, the bit positions
979 of the fields in the relocation information vary per target endian-ness. */
980
981 static void
982 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
983 unsigned char *fields)
984 {
985 unsigned char info = fields[3];
986
987 if (bfd_big_endian (abfd))
988 {
989 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
990 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
991 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
992 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
993 & BFD_MACH_O_LENGTH_MASK;
994 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
995 }
996 else
997 {
998 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
999 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1000 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1001 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1002 & BFD_MACH_O_LENGTH_MASK;
1003 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1004 }
1005 }
1006
1007 static int
1008 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1009 struct mach_o_reloc_info_external *raw,
1010 arelent *res, asymbol **syms)
1011 {
1012 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1013 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1014 bfd_mach_o_reloc_info reloc;
1015 bfd_vma addr;
1016 asymbol **sym;
1017
1018 addr = bfd_get_32 (abfd, raw->r_address);
1019 res->sym_ptr_ptr = NULL;
1020 res->addend = 0;
1021
1022 if (addr & BFD_MACH_O_SR_SCATTERED)
1023 {
1024 unsigned int j;
1025 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1026
1027 /* Scattered relocation, can't be extern. */
1028 reloc.r_scattered = 1;
1029 reloc.r_extern = 0;
1030
1031 /* Extract section and offset from r_value (symnum). */
1032 reloc.r_value = symnum;
1033 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1034 end of the data for the section (e.g. in a calculation of section
1035 data length). At present, the symbol will end up associated with
1036 the following section or, if it falls within alignment padding, as
1037 null - which will assert later. */
1038 for (j = 0; j < mdata->nsects; j++)
1039 {
1040 bfd_mach_o_section *sect = mdata->sections[j];
1041 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1042 {
1043 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1044 res->addend = symnum - sect->addr;
1045 break;
1046 }
1047 }
1048
1049 /* Extract the info and address fields from r_address. */
1050 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1051 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1052 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1053 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1054 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1055 }
1056 else
1057 {
1058 unsigned int num;
1059
1060 /* Non-scattered relocation. */
1061 reloc.r_scattered = 0;
1062
1063 /* The value and info fields have to be extracted dependent on target
1064 endian-ness. */
1065 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1066 num = reloc.r_value;
1067
1068 if (reloc.r_extern)
1069 sym = syms + num;
1070 else if (reloc.r_scattered
1071 || (reloc.r_type != BFD_MACH_O_GENERIC_RELOC_PAIR))
1072 {
1073 BFD_ASSERT (num != 0);
1074 BFD_ASSERT (num <= mdata->nsects);
1075 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1076 /* For a symbol defined in section S, the addend (stored in the
1077 binary) contains the address of the section. To comply with
1078 bfd convention, subtract the section address.
1079 Use the address from the header, so that the user can modify
1080 the vma of the section. */
1081 res->addend = -mdata->sections[num - 1]->addr;
1082 }
1083 else /* ... The 'symnum' in a non-scattered PAIR will be 0x00ffffff. */
1084 {
1085 /* Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1086 in the lower 16bits of the address value. So we have to find the
1087 'symbol' from the preceding reloc. We do this even thoough the
1088 section symbol is probably not needed here, because NULL symbol
1089 values cause an assert in generic BFD code. */
1090 sym = (res - 1)->sym_ptr_ptr;
1091 }
1092 res->sym_ptr_ptr = sym;
1093
1094 /* The 'address' is just r_address.
1095 ??? maybe this should be masked with 0xffffff for safety. */
1096 res->address = addr;
1097 reloc.r_address = addr;
1098 }
1099
1100 /* We have set up a reloc with all the information present, so the swapper can
1101 modify address, value and addend fields, if necessary, to convey information
1102 in the generic BFD reloc that is mach-o specific. */
1103
1104 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1105 return -1;
1106 return 0;
1107 }
1108
1109 static int
1110 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1111 unsigned long count,
1112 arelent *res, asymbol **syms)
1113 {
1114 unsigned long i;
1115 struct mach_o_reloc_info_external *native_relocs;
1116 bfd_size_type native_size;
1117
1118 /* Allocate and read relocs. */
1119 native_size = count * BFD_MACH_O_RELENT_SIZE;
1120 native_relocs =
1121 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1122 if (native_relocs == NULL)
1123 return -1;
1124
1125 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1126 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1127 goto err;
1128
1129 for (i = 0; i < count; i++)
1130 {
1131 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1132 &res[i], syms) < 0)
1133 goto err;
1134 }
1135 free (native_relocs);
1136 return i;
1137 err:
1138 free (native_relocs);
1139 return -1;
1140 }
1141
1142 long
1143 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1144 arelent **rels, asymbol **syms)
1145 {
1146 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1147 unsigned long i;
1148 arelent *res;
1149
1150 if (asect->reloc_count == 0)
1151 return 0;
1152
1153 /* No need to go further if we don't know how to read relocs. */
1154 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1155 return 0;
1156
1157 if (asect->relocation == NULL)
1158 {
1159 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1160 if (res == NULL)
1161 return -1;
1162
1163 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1164 asect->reloc_count, res, syms) < 0)
1165 {
1166 free (res);
1167 return -1;
1168 }
1169 asect->relocation = res;
1170 }
1171
1172 res = asect->relocation;
1173 for (i = 0; i < asect->reloc_count; i++)
1174 rels[i] = &res[i];
1175 rels[i] = NULL;
1176
1177 return i;
1178 }
1179
1180 long
1181 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1182 {
1183 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1184
1185 if (mdata->dysymtab == NULL)
1186 return 1;
1187 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1188 * sizeof (arelent *);
1189 }
1190
1191 long
1192 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1193 struct bfd_symbol **syms)
1194 {
1195 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1196 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1197 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1198 unsigned long i;
1199 arelent *res;
1200
1201 if (dysymtab == NULL)
1202 return 0;
1203 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1204 return 0;
1205
1206 /* No need to go further if we don't know how to read relocs. */
1207 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1208 return 0;
1209
1210 if (mdata->dyn_reloc_cache == NULL)
1211 {
1212 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1213 * sizeof (arelent));
1214 if (res == NULL)
1215 return -1;
1216
1217 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1218 dysymtab->nextrel, res, syms) < 0)
1219 {
1220 free (res);
1221 return -1;
1222 }
1223
1224 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1225 dysymtab->nlocrel,
1226 res + dysymtab->nextrel, syms) < 0)
1227 {
1228 free (res);
1229 return -1;
1230 }
1231
1232 mdata->dyn_reloc_cache = res;
1233 }
1234
1235 res = mdata->dyn_reloc_cache;
1236 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1237 rels[i] = &res[i];
1238 rels[i] = NULL;
1239 return i;
1240 }
1241
1242 /* In addition to the need to byte-swap the symbol number, the bit positions
1243 of the fields in the relocation information vary per target endian-ness. */
1244
1245 static void
1246 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1247 bfd_mach_o_reloc_info *rel)
1248 {
1249 unsigned char info = 0;
1250
1251 BFD_ASSERT (rel->r_type <= 15);
1252 BFD_ASSERT (rel->r_length <= 3);
1253
1254 if (bfd_big_endian (abfd))
1255 {
1256 fields[0] = (rel->r_value >> 16) & 0xff;
1257 fields[1] = (rel->r_value >> 8) & 0xff;
1258 fields[2] = rel->r_value & 0xff;
1259 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1260 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1261 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1262 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1263 }
1264 else
1265 {
1266 fields[2] = (rel->r_value >> 16) & 0xff;
1267 fields[1] = (rel->r_value >> 8) & 0xff;
1268 fields[0] = rel->r_value & 0xff;
1269 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1270 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1271 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1272 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1273 }
1274 fields[3] = info;
1275 }
1276
1277 static bfd_boolean
1278 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1279 {
1280 unsigned int i;
1281 arelent **entries;
1282 asection *sec;
1283 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1284
1285 sec = section->bfdsection;
1286 if (sec->reloc_count == 0)
1287 return TRUE;
1288
1289 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1290 return TRUE;
1291
1292 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1293 return FALSE;
1294
1295 /* Convert and write. */
1296 entries = section->bfdsection->orelocation;
1297 for (i = 0; i < section->nreloc; i++)
1298 {
1299 arelent *rel = entries[i];
1300 struct mach_o_reloc_info_external raw;
1301 bfd_mach_o_reloc_info info, *pinfo = &info;
1302
1303 /* Convert relocation to an intermediate representation. */
1304 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1305 return FALSE;
1306
1307 /* Lower the relocation info. */
1308 if (pinfo->r_scattered)
1309 {
1310 unsigned long v;
1311
1312 v = BFD_MACH_O_SR_SCATTERED
1313 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1314 | BFD_MACH_O_SET_SR_LENGTH(pinfo->r_length)
1315 | BFD_MACH_O_SET_SR_TYPE(pinfo->r_type)
1316 | BFD_MACH_O_SET_SR_ADDRESS(pinfo->r_address);
1317 /* Note: scattered relocs have field in reverse order... */
1318 bfd_put_32 (abfd, v, raw.r_address);
1319 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1320 }
1321 else
1322 {
1323 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1324 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1325 pinfo);
1326 }
1327
1328 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1329 != BFD_MACH_O_RELENT_SIZE)
1330 return FALSE;
1331 }
1332 return TRUE;
1333 }
1334
1335 static int
1336 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1337 {
1338 struct mach_o_section_32_external raw;
1339
1340 memcpy (raw.sectname, section->sectname, 16);
1341 memcpy (raw.segname, section->segname, 16);
1342 bfd_h_put_32 (abfd, section->addr, raw.addr);
1343 bfd_h_put_32 (abfd, section->size, raw.size);
1344 bfd_h_put_32 (abfd, section->offset, raw.offset);
1345 bfd_h_put_32 (abfd, section->align, raw.align);
1346 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1347 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1348 bfd_h_put_32 (abfd, section->flags, raw.flags);
1349 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1350 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1351
1352 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1353 != BFD_MACH_O_SECTION_SIZE)
1354 return -1;
1355
1356 return 0;
1357 }
1358
1359 static int
1360 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1361 {
1362 struct mach_o_section_64_external raw;
1363
1364 memcpy (raw.sectname, section->sectname, 16);
1365 memcpy (raw.segname, section->segname, 16);
1366 bfd_h_put_64 (abfd, section->addr, raw.addr);
1367 bfd_h_put_64 (abfd, section->size, raw.size);
1368 bfd_h_put_32 (abfd, section->offset, raw.offset);
1369 bfd_h_put_32 (abfd, section->align, raw.align);
1370 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1371 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1372 bfd_h_put_32 (abfd, section->flags, raw.flags);
1373 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1374 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1375 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1376
1377 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1378 != BFD_MACH_O_SECTION_64_SIZE)
1379 return -1;
1380
1381 return 0;
1382 }
1383
1384 static int
1385 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1386 {
1387 struct mach_o_segment_command_32_external raw;
1388 bfd_mach_o_segment_command *seg = &command->command.segment;
1389 bfd_mach_o_section *sec;
1390
1391 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1392
1393 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1394 if (!bfd_mach_o_write_relocs (abfd, sec))
1395 return -1;
1396
1397 memcpy (raw.segname, seg->segname, 16);
1398 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1399 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1400 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1401 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1402 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1403 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1404 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1405 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1406
1407 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1408 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1409 return -1;
1410
1411 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1412 if (bfd_mach_o_write_section_32 (abfd, sec))
1413 return -1;
1414
1415 return 0;
1416 }
1417
1418 static int
1419 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1420 {
1421 struct mach_o_segment_command_64_external raw;
1422 bfd_mach_o_segment_command *seg = &command->command.segment;
1423 bfd_mach_o_section *sec;
1424
1425 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1426
1427 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1428 if (!bfd_mach_o_write_relocs (abfd, sec))
1429 return -1;
1430
1431 memcpy (raw.segname, seg->segname, 16);
1432 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1433 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1434 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1435 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1436 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1437 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1438 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1439 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1440
1441 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1442 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1443 return -1;
1444
1445 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1446 if (bfd_mach_o_write_section_64 (abfd, sec))
1447 return -1;
1448
1449 return 0;
1450 }
1451
1452 static bfd_boolean
1453 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1454 {
1455 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1456 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1457 unsigned long i;
1458 unsigned int wide = bfd_mach_o_wide_p (abfd);
1459 unsigned int symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
1460 struct bfd_strtab_hash *strtab;
1461 asymbol **symbols = bfd_get_outsymbols (abfd);
1462
1463 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1464
1465 /* Write the symbols first. */
1466 mdata->filelen = FILE_ALIGN(mdata->filelen, wide ? 3 : 2);
1467 sym->symoff = mdata->filelen;
1468 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1469 return FALSE;
1470
1471 sym->nsyms = bfd_get_symcount (abfd);
1472 mdata->filelen += sym->nsyms * symlen;
1473
1474 strtab = _bfd_stringtab_init ();
1475 if (strtab == NULL)
1476 return FALSE;
1477
1478 if (sym->nsyms > 0)
1479 /* Although we don't strictly need to do this, for compatibility with
1480 Darwin system tools, actually output an empty string for the index
1481 0 entry. */
1482 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1483
1484 for (i = 0; i < sym->nsyms; i++)
1485 {
1486 bfd_size_type str_index;
1487 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1488
1489 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1490 /* An index of 0 always means the empty string. */
1491 str_index = 0;
1492 else
1493 {
1494 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1495
1496 if (str_index == (bfd_size_type) -1)
1497 goto err;
1498 }
1499
1500 if (wide)
1501 {
1502 struct mach_o_nlist_64_external raw;
1503
1504 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1505 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1506 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1507 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1508 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1509 raw.n_value);
1510
1511 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1512 goto err;
1513 }
1514 else
1515 {
1516 struct mach_o_nlist_external raw;
1517
1518 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1519 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1520 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1521 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1522 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1523 raw.n_value);
1524
1525 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1526 goto err;
1527 }
1528 }
1529 sym->strsize = _bfd_stringtab_size (strtab);
1530 sym->stroff = mdata->filelen;
1531 mdata->filelen += sym->strsize;
1532
1533 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1534 goto err;
1535 _bfd_stringtab_free (strtab);
1536
1537 /* The command. */
1538 {
1539 struct mach_o_symtab_command_external raw;
1540
1541 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1542 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1543 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1544 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1545
1546 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1547 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1548 return FALSE;
1549 }
1550
1551 return TRUE;
1552
1553 err:
1554 _bfd_stringtab_free (strtab);
1555 return FALSE;
1556 }
1557
1558 /* Write a dysymtab command.
1559 TODO: Possibly coalesce writes of smaller objects. */
1560
1561 static bfd_boolean
1562 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
1563 {
1564 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
1565
1566 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
1567
1568 if (cmd->nmodtab != 0)
1569 {
1570 unsigned int i;
1571
1572 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
1573 return FALSE;
1574
1575 for (i = 0; i < cmd->nmodtab; i++)
1576 {
1577 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
1578 unsigned int iinit;
1579 unsigned int ninit;
1580
1581 iinit = module->iinit & 0xffff;
1582 iinit |= ((module->iterm & 0xffff) << 16);
1583
1584 ninit = module->ninit & 0xffff;
1585 ninit |= ((module->nterm & 0xffff) << 16);
1586
1587 if (bfd_mach_o_wide_p (abfd))
1588 {
1589 struct mach_o_dylib_module_64_external w;
1590
1591 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
1592 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
1593 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
1594 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
1595 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
1596 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
1597 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
1598 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
1599 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
1600 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
1601 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
1602 bfd_h_put_64 (abfd, module->objc_module_info_addr,
1603 &w.objc_module_info_addr);
1604 bfd_h_put_32 (abfd, module->objc_module_info_size,
1605 &w.objc_module_info_size);
1606
1607 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
1608 return FALSE;
1609 }
1610 else
1611 {
1612 struct mach_o_dylib_module_external n;
1613
1614 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
1615 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
1616 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
1617 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
1618 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
1619 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
1620 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
1621 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
1622 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
1623 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
1624 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
1625 bfd_h_put_32 (abfd, module->objc_module_info_addr,
1626 &n.objc_module_info_addr);
1627 bfd_h_put_32 (abfd, module->objc_module_info_size,
1628 &n.objc_module_info_size);
1629
1630 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
1631 return FALSE;
1632 }
1633 }
1634 }
1635
1636 if (cmd->ntoc != 0)
1637 {
1638 unsigned int i;
1639
1640 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
1641 return FALSE;
1642
1643 for (i = 0; i < cmd->ntoc; i++)
1644 {
1645 struct mach_o_dylib_table_of_contents_external raw;
1646 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
1647
1648 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
1649 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
1650
1651 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1652 return FALSE;
1653 }
1654 }
1655
1656 if (cmd->nindirectsyms > 0)
1657 {
1658 unsigned int i;
1659
1660 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
1661 return FALSE;
1662
1663 for (i = 0; i < cmd->nindirectsyms; ++i)
1664 {
1665 unsigned char raw[4];
1666
1667 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
1668 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1669 return FALSE;
1670 }
1671 }
1672
1673 if (cmd->nextrefsyms != 0)
1674 {
1675 unsigned int i;
1676
1677 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
1678 return FALSE;
1679
1680 for (i = 0; i < cmd->nextrefsyms; i++)
1681 {
1682 unsigned long v;
1683 unsigned char raw[4];
1684 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
1685
1686 /* Fields isym and flags are written as bit-fields, thus we need
1687 a specific processing for endianness. */
1688
1689 if (bfd_big_endian (abfd))
1690 {
1691 v = ((ref->isym & 0xffffff) << 8);
1692 v |= ref->flags & 0xff;
1693 }
1694 else
1695 {
1696 v = ref->isym & 0xffffff;
1697 v |= ((ref->flags & 0xff) << 24);
1698 }
1699
1700 bfd_h_put_32 (abfd, v, raw);
1701 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1702 return FALSE;
1703 }
1704 }
1705
1706 /* The command. */
1707 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
1708 return FALSE;
1709 else
1710 {
1711 struct mach_o_dysymtab_command_external raw;
1712
1713 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
1714 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
1715 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
1716 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
1717 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
1718 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
1719 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
1720 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
1721 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
1722 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
1723 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
1724 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
1725 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
1726 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
1727 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
1728 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
1729 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
1730 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
1731
1732 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1733 return FALSE;
1734 }
1735
1736 return TRUE;
1737 }
1738
1739 static unsigned
1740 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
1741 {
1742 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
1743
1744 /* Just leave debug symbols where they are (pretend they are local, and
1745 then they will just be sorted on position). */
1746 if (s->n_type & BFD_MACH_O_N_STAB)
1747 return 0;
1748
1749 /* Local (we should never see an undefined local AFAICT). */
1750 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
1751 return 0;
1752
1753 /* Common symbols look like undefined externs. */
1754 if (mtyp == BFD_MACH_O_N_UNDF)
1755 return 2;
1756
1757 /* A defined non-local, non-debug symbol. */
1758 return 1;
1759 }
1760
1761 static int
1762 bfd_mach_o_cf_symbols (const void *a, const void *b)
1763 {
1764 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
1765 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
1766 unsigned int soa, sob;
1767
1768 soa = bfd_mach_o_primary_symbol_sort_key (sa);
1769 sob = bfd_mach_o_primary_symbol_sort_key (sb);
1770 if (soa < sob)
1771 return -1;
1772
1773 if (soa > sob)
1774 return 1;
1775
1776 /* If it's local or stab, just preserve the input order. */
1777 if (soa == 0)
1778 {
1779 if (sa->symbol.udata.i < sb->symbol.udata.i)
1780 return -1;
1781 if (sa->symbol.udata.i > sb->symbol.udata.i)
1782 return 1;
1783
1784 /* This is probably an error. */
1785 return 0;
1786 }
1787
1788 /* The second sort key is name. */
1789 return strcmp (sa->symbol.name, sb->symbol.name);
1790 }
1791
1792 /* Process the symbols.
1793
1794 This should be OK for single-module files - but it is not likely to work
1795 for multi-module shared libraries.
1796
1797 (a) If the application has not filled in the relevant mach-o fields, make
1798 an estimate.
1799
1800 (b) Order them, like this:
1801 ( i) local.
1802 (unsorted)
1803 ( ii) external defined
1804 (by name)
1805 (iii) external undefined/common
1806 (by name)
1807 ( iv) common
1808 (by name)
1809 */
1810
1811 static bfd_boolean
1812 bfd_mach_o_mangle_symbols (bfd *abfd)
1813 {
1814 unsigned long i;
1815 asymbol **symbols = bfd_get_outsymbols (abfd);
1816
1817 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
1818 return TRUE;
1819
1820 for (i = 0; i < bfd_get_symcount (abfd); i++)
1821 {
1822 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1823
1824 /* We use this value, which is out-of-range as a symbol index, to signal
1825 that the mach-o-specific data are not filled in and need to be created
1826 from the bfd values. It is much preferable for the application to do
1827 this, since more meaningful diagnostics can be made that way. */
1828
1829 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
1830 {
1831 /* No symbol information has been set - therefore determine
1832 it from the bfd symbol flags/info. */
1833 if (s->symbol.section == bfd_abs_section_ptr)
1834 s->n_type = BFD_MACH_O_N_ABS;
1835 else if (s->symbol.section == bfd_und_section_ptr)
1836 {
1837 s->n_type = BFD_MACH_O_N_UNDF;
1838 if (s->symbol.flags & BSF_WEAK)
1839 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
1840 /* mach-o automatically makes undefined symbols extern. */
1841 s->n_type |= BFD_MACH_O_N_EXT;
1842 s->symbol.flags |= BSF_GLOBAL;
1843 }
1844 else if (s->symbol.section == bfd_com_section_ptr)
1845 {
1846 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
1847 s->symbol.flags |= BSF_GLOBAL;
1848 }
1849 else
1850 s->n_type = BFD_MACH_O_N_SECT;
1851
1852 if (s->symbol.flags & BSF_GLOBAL)
1853 s->n_type |= BFD_MACH_O_N_EXT;
1854 }
1855
1856 /* Put the section index in, where required. */
1857 if ((s->symbol.section != bfd_abs_section_ptr
1858 && s->symbol.section != bfd_und_section_ptr
1859 && s->symbol.section != bfd_com_section_ptr)
1860 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
1861 && s->symbol.name == NULL))
1862 s->n_sect = s->symbol.section->target_index;
1863
1864 /* Number to preserve order for local and debug syms. */
1865 s->symbol.udata.i = i;
1866 }
1867
1868 /* Sort the symbols. */
1869 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
1870 sizeof (asymbol *), bfd_mach_o_cf_symbols);
1871
1872 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1873 {
1874 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1875 s->symbol.udata.i = i; /* renumber. */
1876 }
1877
1878 return TRUE;
1879 }
1880
1881 /* We build a flat table of sections, which can be re-ordered if necessary.
1882 Fill in the section number and other mach-o-specific data. */
1883
1884 static bfd_boolean
1885 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
1886 {
1887 asection *sec;
1888 unsigned target_index;
1889 unsigned nsect;
1890
1891 nsect = bfd_count_sections (abfd);
1892
1893 /* Don't do it if it's already set - assume the application knows what it's
1894 doing. */
1895 if (mdata->nsects == nsect
1896 && (mdata->nsects == 0 || mdata->sections != NULL))
1897 return TRUE;
1898
1899 mdata->nsects = nsect;
1900 mdata->sections = bfd_alloc (abfd,
1901 mdata->nsects * sizeof (bfd_mach_o_section *));
1902 if (mdata->sections == NULL)
1903 return FALSE;
1904
1905 /* We need to check that this can be done... */
1906 if (nsect > 255)
1907 (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
1908 " maximum is 255,\n"), nsect);
1909
1910 /* Create Mach-O sections.
1911 Section type, attribute and align should have been set when the
1912 section was created - either read in or specified. */
1913 target_index = 0;
1914 for (sec = abfd->sections; sec; sec = sec->next)
1915 {
1916 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
1917 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
1918
1919 mdata->sections[target_index] = msect;
1920
1921 msect->addr = bfd_get_section_vma (abfd, sec);
1922 msect->size = bfd_get_section_size (sec);
1923
1924 /* Use the largest alignment set, in case it was bumped after the
1925 section was created. */
1926 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
1927
1928 msect->offset = 0;
1929 sec->target_index = ++target_index;
1930 }
1931
1932 return TRUE;
1933 }
1934
1935 bfd_boolean
1936 bfd_mach_o_write_contents (bfd *abfd)
1937 {
1938 unsigned int i;
1939 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1940
1941 /* Make the commands, if not already present. */
1942 if (mdata->header.ncmds == 0)
1943 if (!bfd_mach_o_build_commands (abfd))
1944 return FALSE;
1945
1946 if (!bfd_mach_o_write_header (abfd, &mdata->header))
1947 return FALSE;
1948
1949 for (i = 0; i < mdata->header.ncmds; i++)
1950 {
1951 struct mach_o_load_command_external raw;
1952 bfd_mach_o_load_command *cur = &mdata->commands[i];
1953 unsigned long typeflag;
1954
1955 typeflag = cur->type | (cur->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
1956
1957 bfd_h_put_32 (abfd, typeflag, raw.cmd);
1958 bfd_h_put_32 (abfd, cur->len, raw.cmdsize);
1959
1960 if (bfd_seek (abfd, cur->offset, SEEK_SET) != 0
1961 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
1962 return FALSE;
1963
1964 switch (cur->type)
1965 {
1966 case BFD_MACH_O_LC_SEGMENT:
1967 if (bfd_mach_o_write_segment_32 (abfd, cur) != 0)
1968 return FALSE;
1969 break;
1970 case BFD_MACH_O_LC_SEGMENT_64:
1971 if (bfd_mach_o_write_segment_64 (abfd, cur) != 0)
1972 return FALSE;
1973 break;
1974 case BFD_MACH_O_LC_SYMTAB:
1975 if (!bfd_mach_o_write_symtab (abfd, cur))
1976 return FALSE;
1977 break;
1978 case BFD_MACH_O_LC_DYSYMTAB:
1979 if (!bfd_mach_o_write_dysymtab (abfd, cur))
1980 return FALSE;
1981 break;
1982 case BFD_MACH_O_LC_SYMSEG:
1983 break;
1984 case BFD_MACH_O_LC_THREAD:
1985 case BFD_MACH_O_LC_UNIXTHREAD:
1986 if (bfd_mach_o_write_thread (abfd, cur) != 0)
1987 return FALSE;
1988 break;
1989 case BFD_MACH_O_LC_LOADFVMLIB:
1990 case BFD_MACH_O_LC_IDFVMLIB:
1991 case BFD_MACH_O_LC_IDENT:
1992 case BFD_MACH_O_LC_FVMFILE:
1993 case BFD_MACH_O_LC_PREPAGE:
1994 case BFD_MACH_O_LC_LOAD_DYLIB:
1995 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
1996 case BFD_MACH_O_LC_ID_DYLIB:
1997 case BFD_MACH_O_LC_REEXPORT_DYLIB:
1998 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
1999 case BFD_MACH_O_LC_LOAD_DYLINKER:
2000 case BFD_MACH_O_LC_ID_DYLINKER:
2001 case BFD_MACH_O_LC_PREBOUND_DYLIB:
2002 case BFD_MACH_O_LC_ROUTINES:
2003 case BFD_MACH_O_LC_SUB_FRAMEWORK:
2004 break;
2005 default:
2006 (*_bfd_error_handler) (_("unable to write unknown load command 0x%lx"),
2007 (unsigned long) cur->type);
2008 return FALSE;
2009 }
2010 }
2011
2012 return TRUE;
2013 }
2014
2015 static void
2016 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2017 asection *sec)
2018 {
2019 bfd_mach_o_section *s = (bfd_mach_o_section *)sec->used_by_bfd;
2020 if (seg->sect_head == NULL)
2021 seg->sect_head = s;
2022 else
2023 seg->sect_tail->next = s;
2024 seg->sect_tail = s;
2025 }
2026
2027 /* Create section Mach-O flags from BFD flags. */
2028
2029 static void
2030 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2031 {
2032 flagword bfd_flags;
2033 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2034
2035 /* Create default flags. */
2036 bfd_flags = bfd_get_section_flags (abfd, sec);
2037 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2038 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2039 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2040 | BFD_MACH_O_S_REGULAR;
2041 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2042 s->flags = BFD_MACH_O_S_ZEROFILL;
2043 else if (bfd_flags & SEC_DEBUGGING)
2044 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2045 else
2046 s->flags = BFD_MACH_O_S_REGULAR;
2047 }
2048
2049 /* Count the number of sections in the list for the segment named.
2050
2051 The special case of NULL or "" for the segment name is valid for
2052 an MH_OBJECT file and means 'all sections available'.
2053
2054 Requires that the sections table in mdata be filled in.
2055
2056 Returns the number of sections (0 is valid).
2057 Any number > 255 signals an invalid section count, although we will,
2058 perhaps, allow the file to be written (in line with Darwin tools up
2059 to XCode 4).
2060
2061 A section count of (unsigned long) -1 signals a definite error. */
2062
2063 static unsigned long
2064 bfd_mach_o_count_sections_for_seg (const char *segment,
2065 bfd_mach_o_data_struct *mdata)
2066 {
2067 unsigned i,j;
2068 if (mdata == NULL || mdata->sections == NULL)
2069 return (unsigned long) -1;
2070
2071 /* The MH_OBJECT case, all sections are considered; Although nsects is
2072 is an unsigned long, the maximum valid section count is 255 and this
2073 will have been checked already by mangle_sections. */
2074 if (segment == NULL || segment[0] == '\0')
2075 return mdata->nsects;
2076
2077 /* Count the number of sections we see in this segment. */
2078 j = 0;
2079 for (i = 0; i < mdata->nsects; ++i)
2080 {
2081 bfd_mach_o_section *s = mdata->sections[i];
2082 if (strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
2083 j++;
2084 }
2085 return j;
2086 }
2087
2088 static bfd_boolean
2089 bfd_mach_o_build_seg_command (const char *segment,
2090 bfd_mach_o_data_struct *mdata,
2091 bfd_mach_o_segment_command *seg)
2092 {
2093 unsigned i;
2094 int is_mho = (segment == NULL || segment[0] == '\0');
2095
2096 /* Fill segment command. */
2097 if (is_mho)
2098 memset (seg->segname, 0, sizeof (seg->segname));
2099 else
2100 strncpy (seg->segname, segment, sizeof (seg->segname));
2101
2102 /* TODO: fix this up for non-MH_OBJECT cases. */
2103 seg->vmaddr = 0;
2104 seg->vmsize = 0;
2105
2106 seg->fileoff = mdata->filelen;
2107 seg->filesize = 0;
2108 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2109 | BFD_MACH_O_PROT_EXECUTE;
2110 seg->initprot = seg->maxprot;
2111 seg->flags = 0;
2112 seg->sect_head = NULL;
2113 seg->sect_tail = NULL;
2114
2115 /* Append sections to the segment.
2116
2117 This is a little tedious, we have to honor the need to account zerofill
2118 sections after all the rest. This forces us to do the calculation of
2119 total vmsize in three passes so that any alignment increments are
2120 properly accounted. */
2121
2122 for (i = 0; i < mdata->nsects; ++i)
2123 {
2124 bfd_mach_o_section *s = mdata->sections[i];
2125 asection *sec = s->bfdsection;
2126
2127 /* If we're not making an MH_OBJECT, check whether this section is from
2128 our segment, and skip if not. Otherwise, just add all sections. */
2129 if (! is_mho
2130 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2131 continue;
2132
2133 /* Although we account for zerofill section sizes in vm order, they are
2134 placed in the file in source sequence. */
2135 bfd_mach_o_append_section_to_segment (seg, sec);
2136 s->offset = 0;
2137
2138 /* Zerofill sections have zero file size & offset,
2139 and are not written. */
2140 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2141 || (s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2142 == BFD_MACH_O_S_GB_ZEROFILL)
2143 continue;
2144
2145 if (s->size > 0)
2146 {
2147 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2148 seg->vmsize += s->size;
2149
2150 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2151 seg->filesize += s->size;
2152
2153 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2154 s->offset = mdata->filelen;
2155 }
2156
2157 sec->filepos = s->offset;
2158 mdata->filelen += s->size;
2159 }
2160
2161 /* Now pass through again, for zerofill, only now we just update the vmsize. */
2162 for (i = 0; i < mdata->nsects; ++i)
2163 {
2164 bfd_mach_o_section *s = mdata->sections[i];
2165
2166 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL)
2167 continue;
2168
2169 if (! is_mho
2170 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2171 continue;
2172
2173 if (s->size > 0)
2174 {
2175 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2176 seg->vmsize += s->size;
2177 }
2178 }
2179
2180 /* Now pass through again, for zerofill_GB. */
2181 for (i = 0; i < mdata->nsects; ++i)
2182 {
2183 bfd_mach_o_section *s = mdata->sections[i];
2184
2185 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_GB_ZEROFILL)
2186 continue;
2187
2188 if (! is_mho
2189 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2190 continue;
2191
2192 if (s->size > 0)
2193 {
2194 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2195 seg->vmsize += s->size;
2196 }
2197 }
2198
2199 /* Allocate space for the relocations. */
2200 mdata->filelen = FILE_ALIGN(mdata->filelen, 2);
2201
2202 for (i = 0; i < mdata->nsects; ++i)
2203 {
2204 bfd_mach_o_section *ms = mdata->sections[i];
2205 asection *sec = ms->bfdsection;
2206
2207 if ((ms->nreloc = sec->reloc_count) == 0)
2208 {
2209 ms->reloff = 0;
2210 continue;
2211 }
2212 sec->rel_filepos = mdata->filelen;
2213 ms->reloff = sec->rel_filepos;
2214 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2215 }
2216
2217 return TRUE;
2218 }
2219
2220 /* Count the number of indirect symbols in the image.
2221 Requires that the sections are in their final order. */
2222
2223 static unsigned int
2224 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2225 {
2226 unsigned int i;
2227 unsigned int nisyms = 0;
2228
2229 for (i = 0; i < mdata->nsects; ++i)
2230 {
2231 bfd_mach_o_section *sec = mdata->sections[i];
2232
2233 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2234 {
2235 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2236 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2237 case BFD_MACH_O_S_SYMBOL_STUBS:
2238 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2239 break;
2240 default:
2241 break;
2242 }
2243 }
2244 return nisyms;
2245 }
2246
2247 static bfd_boolean
2248 bfd_mach_o_build_dysymtab_command (bfd *abfd,
2249 bfd_mach_o_data_struct *mdata,
2250 bfd_mach_o_load_command *cmd)
2251 {
2252 bfd_mach_o_dysymtab_command *dsym = &cmd->command.dysymtab;
2253
2254 /* TODO:
2255 We are not going to try and fill these in yet and, moreover, we are
2256 going to bail if they are already set. */
2257 if (dsym->nmodtab != 0
2258 || dsym->ntoc != 0
2259 || dsym->nextrefsyms != 0)
2260 {
2261 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
2262 " implemented for dysymtab commands."));
2263 return FALSE;
2264 }
2265
2266 dsym->ilocalsym = 0;
2267
2268 if (bfd_get_symcount (abfd) > 0)
2269 {
2270 asymbol **symbols = bfd_get_outsymbols (abfd);
2271 unsigned long i;
2272
2273 /* Count the number of each kind of symbol. */
2274 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2275 {
2276 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2277 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2278 break;
2279 }
2280 dsym->nlocalsym = i;
2281 dsym->iextdefsym = i;
2282 for (; i < bfd_get_symcount (abfd); ++i)
2283 {
2284 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2285 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2286 break;
2287 }
2288 dsym->nextdefsym = i - dsym->nlocalsym;
2289 dsym->iundefsym = dsym->nextdefsym + dsym->iextdefsym;
2290 dsym->nundefsym = bfd_get_symcount (abfd)
2291 - dsym->nlocalsym
2292 - dsym->nextdefsym;
2293 }
2294 else
2295 {
2296 dsym->nlocalsym = 0;
2297 dsym->iextdefsym = 0;
2298 dsym->nextdefsym = 0;
2299 dsym->iundefsym = 0;
2300 dsym->nundefsym = 0;
2301 }
2302
2303 dsym->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2304 if (dsym->nindirectsyms > 0)
2305 {
2306 unsigned i;
2307 unsigned n;
2308
2309 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2310 dsym->indirectsymoff = mdata->filelen;
2311 mdata->filelen += dsym->nindirectsyms * 4;
2312
2313 dsym->indirect_syms = bfd_zalloc (abfd, dsym->nindirectsyms * 4);
2314 if (dsym->indirect_syms == NULL)
2315 return FALSE;
2316
2317 n = 0;
2318 for (i = 0; i < mdata->nsects; ++i)
2319 {
2320 bfd_mach_o_section *sec = mdata->sections[i];
2321
2322 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2323 {
2324 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2325 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2326 case BFD_MACH_O_S_SYMBOL_STUBS:
2327 {
2328 unsigned j, num;
2329 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2330
2331 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2332 if (isyms == NULL || num == 0)
2333 break;
2334 /* Record the starting index in the reserved1 field. */
2335 sec->reserved1 = n;
2336 for (j = 0; j < num; j++, n++)
2337 {
2338 if (isyms[j] == NULL)
2339 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2340 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2341 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2342 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2343 | BFD_MACH_O_INDIRECT_SYM_ABS;
2344 else
2345 dsym->indirect_syms[n] = isyms[j]->symbol.udata.i;
2346 }
2347 }
2348 break;
2349 default:
2350 break;
2351 }
2352 }
2353 }
2354
2355 return TRUE;
2356 }
2357
2358 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2359 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2360 and copy functionality. */
2361
2362 bfd_boolean
2363 bfd_mach_o_build_commands (bfd *abfd)
2364 {
2365 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2366 unsigned wide = mach_o_wide_p (&mdata->header);
2367 int segcmd_idx = -1;
2368 int symtab_idx = -1;
2369 int dysymtab_idx = -1;
2370 unsigned long base_offset = 0;
2371
2372 /* Return now if commands are already present. */
2373 if (mdata->header.ncmds)
2374 return FALSE;
2375
2376 /* Fill in the file type, if not already set. */
2377
2378 if (mdata->header.filetype == 0)
2379 {
2380 if (abfd->flags & EXEC_P)
2381 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2382 else if (abfd->flags & DYNAMIC)
2383 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2384 else
2385 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2386 }
2387
2388 /* If hasn't already been done, flatten sections list, and sort
2389 if/when required. Must be done before the symbol table is adjusted,
2390 since that depends on properly numbered sections. */
2391 if (mdata->nsects == 0 || mdata->sections == NULL)
2392 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2393 return FALSE;
2394
2395 /* Order the symbol table, fill-in/check mach-o specific fields and
2396 partition out any indirect symbols. */
2397 if (!bfd_mach_o_mangle_symbols (abfd))
2398 return FALSE;
2399
2400 /* Very simple command set (only really applicable to MH_OBJECTs):
2401 All the commands are optional - present only when there is suitable data.
2402 (i.e. it is valid to have an empty file)
2403
2404 a command (segment) to contain all the sections,
2405 command for the symbol table,
2406 a command for the dysymtab.
2407
2408 ??? maybe we should assert that this is an MH_OBJECT? */
2409
2410 if (mdata->nsects > 0)
2411 {
2412 segcmd_idx = 0;
2413 mdata->header.ncmds = 1;
2414 }
2415
2416 if (bfd_get_symcount (abfd) > 0)
2417 {
2418 mdata->header.ncmds++;
2419 symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */
2420 }
2421
2422 /* FIXME:
2423 This is a rather crude test for whether we should build a dysymtab. */
2424 if (bfd_mach_o_should_emit_dysymtab ()
2425 && bfd_get_symcount (abfd))
2426 {
2427 mdata->header.ncmds++;
2428 /* If there should be a case where a dysymtab could be emitted without
2429 a symtab (seems improbable), this would need amending. */
2430 dysymtab_idx = symtab_idx + 1;
2431 }
2432
2433 if (wide)
2434 base_offset = BFD_MACH_O_HEADER_64_SIZE;
2435 else
2436 base_offset = BFD_MACH_O_HEADER_SIZE;
2437
2438 /* Well, we must have a header, at least. */
2439 mdata->filelen = base_offset;
2440
2441 /* A bit unusual, but no content is valid;
2442 as -n empty.s -o empty.o */
2443 if (mdata->header.ncmds == 0)
2444 return TRUE;
2445
2446 mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds
2447 * sizeof (bfd_mach_o_load_command));
2448 if (mdata->commands == NULL)
2449 return FALSE;
2450
2451 if (segcmd_idx >= 0)
2452 {
2453 bfd_mach_o_load_command *cmd = &mdata->commands[segcmd_idx];
2454 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2455
2456 /* Count the segctions in the special blank segment used for MH_OBJECT. */
2457 seg->nsects = bfd_mach_o_count_sections_for_seg (NULL, mdata);
2458 if (seg->nsects == (unsigned long) -1)
2459 return FALSE;
2460
2461 /* Init segment command. */
2462 cmd->offset = base_offset;
2463 if (wide)
2464 {
2465 cmd->type = BFD_MACH_O_LC_SEGMENT_64;
2466 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2467 + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
2468 }
2469 else
2470 {
2471 cmd->type = BFD_MACH_O_LC_SEGMENT;
2472 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2473 + BFD_MACH_O_SECTION_SIZE * seg->nsects;
2474 }
2475
2476 cmd->type_required = FALSE;
2477 mdata->header.sizeofcmds = cmd->len;
2478 mdata->filelen += cmd->len;
2479 }
2480
2481 if (symtab_idx >= 0)
2482 {
2483 /* Init symtab command. */
2484 bfd_mach_o_load_command *cmd = &mdata->commands[symtab_idx];
2485
2486 cmd->type = BFD_MACH_O_LC_SYMTAB;
2487 cmd->offset = base_offset;
2488 if (segcmd_idx >= 0)
2489 cmd->offset += mdata->commands[segcmd_idx].len;
2490
2491 cmd->len = sizeof (struct mach_o_symtab_command_external)
2492 + BFD_MACH_O_LC_SIZE;
2493 cmd->type_required = FALSE;
2494 mdata->header.sizeofcmds += cmd->len;
2495 mdata->filelen += cmd->len;
2496 }
2497
2498 /* If required, setup symtab command, see comment above about the quality
2499 of this test. */
2500 if (dysymtab_idx >= 0)
2501 {
2502 bfd_mach_o_load_command *cmd = &mdata->commands[dysymtab_idx];
2503
2504 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
2505 if (symtab_idx >= 0)
2506 cmd->offset = mdata->commands[symtab_idx].offset
2507 + mdata->commands[symtab_idx].len;
2508 else if (segcmd_idx >= 0)
2509 cmd->offset = mdata->commands[segcmd_idx].offset
2510 + mdata->commands[segcmd_idx].len;
2511 else
2512 cmd->offset = base_offset;
2513
2514 cmd->type_required = FALSE;
2515 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2516 + BFD_MACH_O_LC_SIZE;
2517
2518 mdata->header.sizeofcmds += cmd->len;
2519 mdata->filelen += cmd->len;
2520 }
2521
2522 /* So, now we have sized the commands and the filelen set to that.
2523 Now we can build the segment command and set the section file offsets. */
2524 if (segcmd_idx >= 0
2525 && ! bfd_mach_o_build_seg_command
2526 (NULL, mdata, &mdata->commands[segcmd_idx].command.segment))
2527 return FALSE;
2528
2529 /* If we're doing a dysymtab, cmd points to its load command. */
2530 if (dysymtab_idx >= 0
2531 && ! bfd_mach_o_build_dysymtab_command (abfd, mdata,
2532 &mdata->commands[dysymtab_idx]))
2533 return FALSE;
2534
2535 /* The symtab command is filled in when the symtab is written. */
2536 return TRUE;
2537 }
2538
2539 /* Set the contents of a section. */
2540
2541 bfd_boolean
2542 bfd_mach_o_set_section_contents (bfd *abfd,
2543 asection *section,
2544 const void * location,
2545 file_ptr offset,
2546 bfd_size_type count)
2547 {
2548 file_ptr pos;
2549
2550 /* Trying to write the first section contents will trigger the creation of
2551 the load commands if they are not already present. */
2552 if (! abfd->output_has_begun && ! bfd_mach_o_build_commands (abfd))
2553 return FALSE;
2554
2555 if (count == 0)
2556 return TRUE;
2557
2558 pos = section->filepos + offset;
2559 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2560 || bfd_bwrite (location, count, abfd) != count)
2561 return FALSE;
2562
2563 return TRUE;
2564 }
2565
2566 int
2567 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
2568 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2569 {
2570 return 0;
2571 }
2572
2573 /* Make an empty symbol. This is required only because
2574 bfd_make_section_anyway wants to create a symbol for the section. */
2575
2576 asymbol *
2577 bfd_mach_o_make_empty_symbol (bfd *abfd)
2578 {
2579 asymbol *new_symbol;
2580
2581 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
2582 if (new_symbol == NULL)
2583 return new_symbol;
2584 new_symbol->the_bfd = abfd;
2585 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
2586 return new_symbol;
2587 }
2588
2589 static bfd_boolean
2590 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
2591 {
2592 struct mach_o_header_external raw;
2593 unsigned int size;
2594 bfd_vma (*get32) (const void *) = NULL;
2595
2596 /* Just read the magic number. */
2597 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2598 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
2599 return FALSE;
2600
2601 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2602 {
2603 header->byteorder = BFD_ENDIAN_BIG;
2604 header->magic = BFD_MACH_O_MH_MAGIC;
2605 header->version = 1;
2606 get32 = bfd_getb32;
2607 }
2608 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2609 {
2610 header->byteorder = BFD_ENDIAN_LITTLE;
2611 header->magic = BFD_MACH_O_MH_MAGIC;
2612 header->version = 1;
2613 get32 = bfd_getl32;
2614 }
2615 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2616 {
2617 header->byteorder = BFD_ENDIAN_BIG;
2618 header->magic = BFD_MACH_O_MH_MAGIC_64;
2619 header->version = 2;
2620 get32 = bfd_getb32;
2621 }
2622 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2623 {
2624 header->byteorder = BFD_ENDIAN_LITTLE;
2625 header->magic = BFD_MACH_O_MH_MAGIC_64;
2626 header->version = 2;
2627 get32 = bfd_getl32;
2628 }
2629 else
2630 {
2631 header->byteorder = BFD_ENDIAN_UNKNOWN;
2632 return FALSE;
2633 }
2634
2635 /* Once the size of the header is known, read the full header. */
2636 size = mach_o_wide_p (header) ?
2637 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2638
2639 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2640 || bfd_bread (&raw, size, abfd) != size)
2641 return FALSE;
2642
2643 header->cputype = (*get32) (raw.cputype);
2644 header->cpusubtype = (*get32) (raw.cpusubtype);
2645 header->filetype = (*get32) (raw.filetype);
2646 header->ncmds = (*get32) (raw.ncmds);
2647 header->sizeofcmds = (*get32) (raw.sizeofcmds);
2648 header->flags = (*get32) (raw.flags);
2649
2650 if (mach_o_wide_p (header))
2651 header->reserved = (*get32) (raw.reserved);
2652 else
2653 header->reserved = 0;
2654
2655 return TRUE;
2656 }
2657
2658 bfd_boolean
2659 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
2660 {
2661 bfd_mach_o_section *s;
2662 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
2663
2664 s = bfd_mach_o_get_mach_o_section (sec);
2665 if (s == NULL)
2666 {
2667 flagword bfd_flags;
2668 static const mach_o_section_name_xlat * xlat;
2669
2670 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
2671 if (s == NULL)
2672 return FALSE;
2673 sec->used_by_bfd = s;
2674 s->bfdsection = sec;
2675
2676 /* Create the Darwin seg/sect name pair from the bfd name.
2677 If this is a canonical name for which a specific paiting exists
2678 there will also be defined flags, type, attribute and alignment
2679 values. */
2680 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
2681 if (xlat != NULL)
2682 {
2683 s->flags = xlat->macho_sectype | xlat->macho_secattr;
2684 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
2685 : bfdalign;
2686 bfd_set_section_alignment (abfd, sec, s->align);
2687 bfd_flags = bfd_get_section_flags (abfd, sec);
2688 if (bfd_flags == SEC_NO_FLAGS)
2689 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
2690 }
2691 else
2692 /* Create default flags. */
2693 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
2694 }
2695
2696 return _bfd_generic_new_section_hook (abfd, sec);
2697 }
2698
2699 static void
2700 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
2701 unsigned long prot)
2702 {
2703 flagword flags;
2704 bfd_mach_o_section *section;
2705
2706 flags = bfd_get_section_flags (abfd, sec);
2707 section = bfd_mach_o_get_mach_o_section (sec);
2708
2709 /* TODO: see if we should use the xlat system for doing this by
2710 preference and fall back to this for unknown sections. */
2711
2712 if (flags == SEC_NO_FLAGS)
2713 {
2714 /* Try to guess flags. */
2715 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
2716 flags = SEC_DEBUGGING;
2717 else
2718 {
2719 flags = SEC_ALLOC;
2720 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2721 != BFD_MACH_O_S_ZEROFILL)
2722 {
2723 flags |= SEC_LOAD;
2724 if (prot & BFD_MACH_O_PROT_EXECUTE)
2725 flags |= SEC_CODE;
2726 if (prot & BFD_MACH_O_PROT_WRITE)
2727 flags |= SEC_DATA;
2728 else if (prot & BFD_MACH_O_PROT_READ)
2729 flags |= SEC_READONLY;
2730 }
2731 }
2732 }
2733 else
2734 {
2735 if ((flags & SEC_DEBUGGING) == 0)
2736 flags |= SEC_ALLOC;
2737 }
2738
2739 if (section->offset != 0)
2740 flags |= SEC_HAS_CONTENTS;
2741 if (section->nreloc != 0)
2742 flags |= SEC_RELOC;
2743
2744 bfd_set_section_flags (abfd, sec, flags);
2745
2746 sec->vma = section->addr;
2747 sec->lma = section->addr;
2748 sec->size = section->size;
2749 sec->filepos = section->offset;
2750 sec->alignment_power = section->align;
2751 sec->segment_mark = 0;
2752 sec->reloc_count = section->nreloc;
2753 sec->rel_filepos = section->reloff;
2754 }
2755
2756 static asection *
2757 bfd_mach_o_make_bfd_section (bfd *abfd,
2758 const unsigned char *segname,
2759 const unsigned char *sectname)
2760 {
2761 const char *sname;
2762 flagword flags;
2763
2764 bfd_mach_o_convert_section_name_to_bfd
2765 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
2766 if (sname == NULL)
2767 return NULL;
2768
2769 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
2770 }
2771
2772 static asection *
2773 bfd_mach_o_read_section_32 (bfd *abfd,
2774 unsigned int offset,
2775 unsigned long prot)
2776 {
2777 struct mach_o_section_32_external raw;
2778 asection *sec;
2779 bfd_mach_o_section *section;
2780
2781 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2782 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
2783 != BFD_MACH_O_SECTION_SIZE))
2784 return NULL;
2785
2786 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2787 if (sec == NULL)
2788 return NULL;
2789
2790 section = bfd_mach_o_get_mach_o_section (sec);
2791 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2792 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2793 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2794 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2795 section->addr = bfd_h_get_32 (abfd, raw.addr);
2796 section->size = bfd_h_get_32 (abfd, raw.size);
2797 section->offset = bfd_h_get_32 (abfd, raw.offset);
2798 section->align = bfd_h_get_32 (abfd, raw.align);
2799 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2800 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2801 section->flags = bfd_h_get_32 (abfd, raw.flags);
2802 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2803 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2804 section->reserved3 = 0;
2805
2806 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2807
2808 return sec;
2809 }
2810
2811 static asection *
2812 bfd_mach_o_read_section_64 (bfd *abfd,
2813 unsigned int offset,
2814 unsigned long prot)
2815 {
2816 struct mach_o_section_64_external raw;
2817 asection *sec;
2818 bfd_mach_o_section *section;
2819
2820 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2821 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
2822 != BFD_MACH_O_SECTION_64_SIZE))
2823 return NULL;
2824
2825 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2826 if (sec == NULL)
2827 return NULL;
2828
2829 section = bfd_mach_o_get_mach_o_section (sec);
2830 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2831 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2832 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2833 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2834 section->addr = bfd_h_get_64 (abfd, raw.addr);
2835 section->size = bfd_h_get_64 (abfd, raw.size);
2836 section->offset = bfd_h_get_32 (abfd, raw.offset);
2837 section->align = bfd_h_get_32 (abfd, raw.align);
2838 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2839 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2840 section->flags = bfd_h_get_32 (abfd, raw.flags);
2841 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2842 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2843 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
2844
2845 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2846
2847 return sec;
2848 }
2849
2850 static asection *
2851 bfd_mach_o_read_section (bfd *abfd,
2852 unsigned int offset,
2853 unsigned long prot,
2854 unsigned int wide)
2855 {
2856 if (wide)
2857 return bfd_mach_o_read_section_64 (abfd, offset, prot);
2858 else
2859 return bfd_mach_o_read_section_32 (abfd, offset, prot);
2860 }
2861
2862 static bfd_boolean
2863 bfd_mach_o_read_symtab_symbol (bfd *abfd,
2864 bfd_mach_o_symtab_command *sym,
2865 bfd_mach_o_asymbol *s,
2866 unsigned long i)
2867 {
2868 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2869 unsigned int wide = mach_o_wide_p (&mdata->header);
2870 unsigned int symwidth =
2871 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2872 unsigned int symoff = sym->symoff + (i * symwidth);
2873 struct mach_o_nlist_64_external raw;
2874 unsigned char type = -1;
2875 unsigned char section = -1;
2876 short desc = -1;
2877 symvalue value = -1;
2878 unsigned long stroff = -1;
2879 unsigned int symtype = -1;
2880
2881 BFD_ASSERT (sym->strtab != NULL);
2882
2883 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
2884 || bfd_bread (&raw, symwidth, abfd) != symwidth)
2885 {
2886 (*_bfd_error_handler)
2887 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
2888 symwidth, (unsigned long) symoff);
2889 return FALSE;
2890 }
2891
2892 stroff = bfd_h_get_32 (abfd, raw.n_strx);
2893 type = bfd_h_get_8 (abfd, raw.n_type);
2894 symtype = type & BFD_MACH_O_N_TYPE;
2895 section = bfd_h_get_8 (abfd, raw.n_sect);
2896 desc = bfd_h_get_16 (abfd, raw.n_desc);
2897 if (wide)
2898 value = bfd_h_get_64 (abfd, raw.n_value);
2899 else
2900 value = bfd_h_get_32 (abfd, raw.n_value);
2901
2902 if (stroff >= sym->strsize)
2903 {
2904 (*_bfd_error_handler)
2905 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
2906 (unsigned long) stroff,
2907 (unsigned long) sym->strsize);
2908 return FALSE;
2909 }
2910
2911 s->symbol.the_bfd = abfd;
2912 s->symbol.name = sym->strtab + stroff;
2913 s->symbol.value = value;
2914 s->symbol.flags = 0x0;
2915 s->symbol.udata.i = i;
2916 s->n_type = type;
2917 s->n_sect = section;
2918 s->n_desc = desc;
2919
2920 if (type & BFD_MACH_O_N_STAB)
2921 {
2922 s->symbol.flags |= BSF_DEBUGGING;
2923 s->symbol.section = bfd_und_section_ptr;
2924 switch (type)
2925 {
2926 case N_FUN:
2927 case N_STSYM:
2928 case N_LCSYM:
2929 case N_BNSYM:
2930 case N_SLINE:
2931 case N_ENSYM:
2932 case N_ECOMM:
2933 case N_ECOML:
2934 case N_GSYM:
2935 if ((section > 0) && (section <= mdata->nsects))
2936 {
2937 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2938 s->symbol.value =
2939 s->symbol.value - mdata->sections[section - 1]->addr;
2940 }
2941 break;
2942 }
2943 }
2944 else
2945 {
2946 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
2947 s->symbol.flags |= BSF_GLOBAL;
2948 else
2949 s->symbol.flags |= BSF_LOCAL;
2950
2951 switch (symtype)
2952 {
2953 case BFD_MACH_O_N_UNDF:
2954 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
2955 && s->symbol.value != 0)
2956 {
2957 /* A common symbol. */
2958 s->symbol.section = bfd_com_section_ptr;
2959 s->symbol.flags = BSF_NO_FLAGS;
2960 }
2961 else
2962 {
2963 s->symbol.section = bfd_und_section_ptr;
2964 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
2965 s->symbol.flags |= BSF_WEAK;
2966 }
2967 break;
2968 case BFD_MACH_O_N_PBUD:
2969 s->symbol.section = bfd_und_section_ptr;
2970 break;
2971 case BFD_MACH_O_N_ABS:
2972 s->symbol.section = bfd_abs_section_ptr;
2973 break;
2974 case BFD_MACH_O_N_SECT:
2975 if ((section > 0) && (section <= mdata->nsects))
2976 {
2977 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2978 s->symbol.value =
2979 s->symbol.value - mdata->sections[section - 1]->addr;
2980 }
2981 else
2982 {
2983 /* Mach-O uses 0 to mean "no section"; not an error. */
2984 if (section != 0)
2985 {
2986 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
2987 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
2988 s->symbol.name, section, mdata->nsects);
2989 }
2990 s->symbol.section = bfd_und_section_ptr;
2991 }
2992 break;
2993 case BFD_MACH_O_N_INDR:
2994 /* FIXME: we don't follow the BFD convention as this indirect symbol
2995 won't be followed by the referenced one. This looks harmless
2996 unless we start using the linker. */
2997 s->symbol.flags |= BSF_INDIRECT;
2998 s->symbol.section = bfd_ind_section_ptr;
2999 s->symbol.value = 0;
3000 break;
3001 default:
3002 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3003 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3004 s->symbol.name, symtype);
3005 s->symbol.section = bfd_und_section_ptr;
3006 break;
3007 }
3008 }
3009
3010 return TRUE;
3011 }
3012
3013 bfd_boolean
3014 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3015 {
3016 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3017 bfd_mach_o_symtab_command *sym = mdata->symtab;
3018
3019 /* Fail if there is no symtab. */
3020 if (sym == NULL)
3021 return FALSE;
3022
3023 /* Success if already loaded. */
3024 if (sym->strtab)
3025 return TRUE;
3026
3027 if (abfd->flags & BFD_IN_MEMORY)
3028 {
3029 struct bfd_in_memory *b;
3030
3031 b = (struct bfd_in_memory *) abfd->iostream;
3032
3033 if ((sym->stroff + sym->strsize) > b->size)
3034 {
3035 bfd_set_error (bfd_error_file_truncated);
3036 return FALSE;
3037 }
3038 sym->strtab = (char *) b->buffer + sym->stroff;
3039 }
3040 else
3041 {
3042 sym->strtab = bfd_alloc (abfd, sym->strsize);
3043 if (sym->strtab == NULL)
3044 return FALSE;
3045
3046 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3047 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3048 {
3049 bfd_set_error (bfd_error_file_truncated);
3050 return FALSE;
3051 }
3052 }
3053
3054 return TRUE;
3055 }
3056
3057 bfd_boolean
3058 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3059 {
3060 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3061 bfd_mach_o_symtab_command *sym = mdata->symtab;
3062 unsigned long i;
3063
3064 if (sym == NULL || sym->symbols)
3065 {
3066 /* Return now if there are no symbols or if already loaded. */
3067 return TRUE;
3068 }
3069
3070 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3071
3072 if (sym->symbols == NULL)
3073 {
3074 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3075 return FALSE;
3076 }
3077
3078 if (!bfd_mach_o_read_symtab_strtab (abfd))
3079 return FALSE;
3080
3081 for (i = 0; i < sym->nsyms; i++)
3082 {
3083 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3084 return FALSE;
3085 }
3086
3087 return TRUE;
3088 }
3089
3090 static const char *
3091 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3092 {
3093 switch ((int) flavour)
3094 {
3095 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3096 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3097 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3098 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3099 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3100 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3101 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3102 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3103 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3104 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3105 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3106 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3107 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3108 default: return "UNKNOWN";
3109 }
3110 }
3111
3112 static const char *
3113 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3114 {
3115 switch ((int) flavour)
3116 {
3117 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3118 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3119 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3120 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3121 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3122 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3123 default: return "UNKNOWN";
3124 }
3125 }
3126
3127 static int
3128 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3129 {
3130 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3131 struct mach_o_str_command_external raw;
3132 unsigned int nameoff;
3133
3134 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER)
3135 || (command->type == BFD_MACH_O_LC_LOAD_DYLINKER));
3136
3137 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3138 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3139 return -1;
3140
3141 nameoff = bfd_h_get_32 (abfd, raw.str);
3142
3143 cmd->name_offset = command->offset + nameoff;
3144 cmd->name_len = command->len - nameoff;
3145 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3146 if (cmd->name_str == NULL)
3147 return -1;
3148 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3149 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3150 return -1;
3151 return 0;
3152 }
3153
3154 static int
3155 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3156 {
3157 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3158 struct mach_o_dylib_command_external raw;
3159 unsigned int nameoff;
3160
3161 switch (command->type)
3162 {
3163 case BFD_MACH_O_LC_LOAD_DYLIB:
3164 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3165 case BFD_MACH_O_LC_ID_DYLIB:
3166 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3167 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3168 break;
3169 default:
3170 BFD_FAIL ();
3171 return -1;
3172 }
3173
3174 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3175 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3176 return -1;
3177
3178 nameoff = bfd_h_get_32 (abfd, raw.name);
3179 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3180 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3181 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3182
3183 cmd->name_offset = command->offset + nameoff;
3184 cmd->name_len = command->len - nameoff;
3185 cmd->name_str = bfd_alloc (abfd, cmd->name_len);
3186 if (cmd->name_str == NULL)
3187 return -1;
3188 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3189 || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len)
3190 return -1;
3191 return 0;
3192 }
3193
3194 static int
3195 bfd_mach_o_read_prebound_dylib (bfd *abfd ATTRIBUTE_UNUSED,
3196 bfd_mach_o_load_command *command ATTRIBUTE_UNUSED)
3197 {
3198 /* bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; */
3199
3200 BFD_ASSERT (command->type == BFD_MACH_O_LC_PREBOUND_DYLIB);
3201 return 0;
3202 }
3203
3204 static int
3205 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3206 {
3207 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3208 struct mach_o_fvmlib_command_external raw;
3209 unsigned int nameoff;
3210
3211 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3212 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3213 return -1;
3214
3215 nameoff = bfd_h_get_32 (abfd, raw.name);
3216 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3217 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3218
3219 fvm->name_offset = command->offset + nameoff;
3220 fvm->name_len = command->len - nameoff;
3221 fvm->name_str = bfd_alloc (abfd, fvm->name_len);
3222 if (fvm->name_str == NULL)
3223 return -1;
3224 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3225 || bfd_bread (fvm->name_str, fvm->name_len, abfd) != fvm->name_len)
3226 return -1;
3227 return 0;
3228 }
3229
3230 static int
3231 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3232 {
3233 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3234 bfd_mach_o_thread_command *cmd = &command->command.thread;
3235 unsigned int offset;
3236 unsigned int nflavours;
3237 unsigned int i;
3238
3239 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3240 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3241
3242 /* Count the number of threads. */
3243 offset = 8;
3244 nflavours = 0;
3245 while (offset != command->len)
3246 {
3247 struct mach_o_thread_command_external raw;
3248
3249 if (offset >= command->len)
3250 return -1;
3251
3252 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3253 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3254 return -1;
3255
3256 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3257 nflavours++;
3258 }
3259
3260 /* Allocate threads. */
3261 cmd->flavours = bfd_alloc
3262 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3263 if (cmd->flavours == NULL)
3264 return -1;
3265 cmd->nflavours = nflavours;
3266
3267 offset = 8;
3268 nflavours = 0;
3269 while (offset != command->len)
3270 {
3271 struct mach_o_thread_command_external raw;
3272
3273 if (offset >= command->len)
3274 return -1;
3275
3276 if (nflavours >= cmd->nflavours)
3277 return -1;
3278
3279 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3280 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3281 return -1;
3282
3283 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3284 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3285 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3286 offset += cmd->flavours[nflavours].size + sizeof (raw);
3287 nflavours++;
3288 }
3289
3290 for (i = 0; i < nflavours; i++)
3291 {
3292 asection *bfdsec;
3293 unsigned int snamelen;
3294 char *sname;
3295 const char *flavourstr;
3296 const char *prefix = "LC_THREAD";
3297 unsigned int j = 0;
3298
3299 switch (mdata->header.cputype)
3300 {
3301 case BFD_MACH_O_CPU_TYPE_POWERPC:
3302 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3303 flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3304 break;
3305 case BFD_MACH_O_CPU_TYPE_I386:
3306 case BFD_MACH_O_CPU_TYPE_X86_64:
3307 flavourstr = bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3308 break;
3309 default:
3310 flavourstr = "UNKNOWN_ARCHITECTURE";
3311 break;
3312 }
3313
3314 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3315 sname = bfd_alloc (abfd, snamelen);
3316 if (sname == NULL)
3317 return -1;
3318
3319 for (;;)
3320 {
3321 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3322 if (bfd_get_section_by_name (abfd, sname) == NULL)
3323 break;
3324 j++;
3325 }
3326
3327 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
3328
3329 bfdsec->vma = 0;
3330 bfdsec->lma = 0;
3331 bfdsec->size = cmd->flavours[i].size;
3332 bfdsec->filepos = cmd->flavours[i].offset;
3333 bfdsec->alignment_power = 0x0;
3334
3335 cmd->section = bfdsec;
3336 }
3337
3338 return 0;
3339 }
3340
3341 static int
3342 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
3343 {
3344 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
3345 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3346
3347 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
3348
3349 {
3350 struct mach_o_dysymtab_command_external raw;
3351
3352 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3353 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3354 return -1;
3355
3356 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
3357 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
3358 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
3359 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
3360 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
3361 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
3362 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
3363 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
3364 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
3365 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
3366 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
3367 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
3368 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
3369 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
3370 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
3371 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
3372 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
3373 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
3374 }
3375
3376 if (cmd->nmodtab != 0)
3377 {
3378 unsigned int i;
3379 int wide = bfd_mach_o_wide_p (abfd);
3380 unsigned int module_len = wide ? 56 : 52;
3381
3382 cmd->dylib_module =
3383 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
3384 if (cmd->dylib_module == NULL)
3385 return -1;
3386
3387 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
3388 return -1;
3389
3390 for (i = 0; i < cmd->nmodtab; i++)
3391 {
3392 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
3393 unsigned long v;
3394 unsigned char buf[56];
3395
3396 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
3397 return -1;
3398
3399 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
3400 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
3401 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
3402 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
3403 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
3404 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
3405 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
3406 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
3407 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
3408 v = bfd_h_get_32 (abfd, buf +36);
3409 module->iinit = v & 0xffff;
3410 module->iterm = (v >> 16) & 0xffff;
3411 v = bfd_h_get_32 (abfd, buf + 40);
3412 module->ninit = v & 0xffff;
3413 module->nterm = (v >> 16) & 0xffff;
3414 if (wide)
3415 {
3416 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
3417 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
3418 }
3419 else
3420 {
3421 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
3422 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
3423 }
3424 }
3425 }
3426
3427 if (cmd->ntoc != 0)
3428 {
3429 unsigned int i;
3430
3431 cmd->dylib_toc = bfd_alloc
3432 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
3433 if (cmd->dylib_toc == NULL)
3434 return -1;
3435
3436 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
3437 return -1;
3438
3439 for (i = 0; i < cmd->ntoc; i++)
3440 {
3441 struct mach_o_dylib_table_of_contents_external raw;
3442 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
3443
3444 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3445 return -1;
3446
3447 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
3448 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
3449 }
3450 }
3451
3452 if (cmd->nindirectsyms != 0)
3453 {
3454 unsigned int i;
3455
3456 cmd->indirect_syms = bfd_alloc
3457 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
3458 if (cmd->indirect_syms == NULL)
3459 return -1;
3460
3461 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
3462 return -1;
3463
3464 for (i = 0; i < cmd->nindirectsyms; i++)
3465 {
3466 unsigned char raw[4];
3467 unsigned int *is = &cmd->indirect_syms[i];
3468
3469 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3470 return -1;
3471
3472 *is = bfd_h_get_32 (abfd, raw);
3473 }
3474 }
3475
3476 if (cmd->nextrefsyms != 0)
3477 {
3478 unsigned long v;
3479 unsigned int i;
3480
3481 cmd->ext_refs = bfd_alloc
3482 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
3483 if (cmd->ext_refs == NULL)
3484 return -1;
3485
3486 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
3487 return -1;
3488
3489 for (i = 0; i < cmd->nextrefsyms; i++)
3490 {
3491 unsigned char raw[4];
3492 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
3493
3494 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3495 return -1;
3496
3497 /* Fields isym and flags are written as bit-fields, thus we need
3498 a specific processing for endianness. */
3499 v = bfd_h_get_32 (abfd, raw);
3500 if (bfd_big_endian (abfd))
3501 {
3502 ref->isym = (v >> 8) & 0xffffff;
3503 ref->flags = v & 0xff;
3504 }
3505 else
3506 {
3507 ref->isym = v & 0xffffff;
3508 ref->flags = (v >> 24) & 0xff;
3509 }
3510 }
3511 }
3512
3513 if (mdata->dysymtab)
3514 return -1;
3515 mdata->dysymtab = cmd;
3516
3517 return 0;
3518 }
3519
3520 static int
3521 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
3522 {
3523 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
3524 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3525 struct mach_o_symtab_command_external raw;
3526
3527 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
3528
3529 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3530 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3531 return -1;
3532
3533 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
3534 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
3535 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
3536 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
3537 symtab->symbols = NULL;
3538 symtab->strtab = NULL;
3539
3540 if (symtab->nsyms != 0)
3541 abfd->flags |= HAS_SYMS;
3542
3543 if (mdata->symtab)
3544 return -1;
3545 mdata->symtab = symtab;
3546 return 0;
3547 }
3548
3549 static int
3550 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
3551 {
3552 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
3553
3554 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
3555
3556 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3557 || bfd_bread (cmd->uuid, 16, abfd) != 16)
3558 return -1;
3559
3560 return 0;
3561 }
3562
3563 static int
3564 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
3565 {
3566 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
3567 struct mach_o_linkedit_data_command_external raw;
3568
3569 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3570 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3571 return -1;
3572
3573 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
3574 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
3575 return 0;
3576 }
3577
3578 static int
3579 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
3580 {
3581 bfd_mach_o_str_command *cmd = &command->command.str;
3582 struct mach_o_str_command_external raw;
3583 unsigned long off;
3584
3585 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3586 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3587 return -1;
3588
3589 off = bfd_get_32 (abfd, raw.str);
3590 cmd->stroff = command->offset + off;
3591 cmd->str_len = command->len - off;
3592 cmd->str = bfd_alloc (abfd, cmd->str_len);
3593 if (cmd->str == NULL)
3594 return -1;
3595 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
3596 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
3597 return -1;
3598 return 0;
3599 }
3600
3601 static int
3602 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
3603 {
3604 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
3605 struct mach_o_dyld_info_command_external raw;
3606
3607 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3608 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3609 return -1;
3610
3611 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
3612 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
3613 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
3614 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
3615 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
3616 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
3617 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
3618 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
3619 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
3620 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
3621 return 0;
3622 }
3623
3624 static bfd_boolean
3625 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
3626 {
3627 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
3628 struct mach_o_version_min_command_external raw;
3629 unsigned int ver;
3630
3631 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3632 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3633 return FALSE;
3634
3635 ver = bfd_get_32 (abfd, raw.version);
3636 cmd->rel = ver >> 16;
3637 cmd->maj = ver >> 8;
3638 cmd->min = ver;
3639 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
3640 return TRUE;
3641 }
3642
3643 static bfd_boolean
3644 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
3645 {
3646 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
3647 struct mach_o_encryption_info_command_external raw;
3648
3649 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3650 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3651 return FALSE;
3652
3653 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
3654 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
3655 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
3656 return TRUE;
3657 }
3658
3659 static int
3660 bfd_mach_o_read_segment (bfd *abfd,
3661 bfd_mach_o_load_command *command,
3662 unsigned int wide)
3663 {
3664 bfd_mach_o_segment_command *seg = &command->command.segment;
3665 unsigned long i;
3666
3667 if (wide)
3668 {
3669 struct mach_o_segment_command_64_external raw;
3670
3671 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
3672
3673 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3674 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3675 return -1;
3676
3677 memcpy (seg->segname, raw.segname, 16);
3678 seg->segname[16] = '\0';
3679
3680 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
3681 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
3682 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
3683 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
3684 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3685 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3686 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3687 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3688 }
3689 else
3690 {
3691 struct mach_o_segment_command_32_external raw;
3692
3693 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
3694
3695 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3696 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3697 return -1;
3698
3699 memcpy (seg->segname, raw.segname, 16);
3700 seg->segname[16] = '\0';
3701
3702 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
3703 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
3704 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
3705 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
3706 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3707 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3708 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3709 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3710 }
3711 seg->sect_head = NULL;
3712 seg->sect_tail = NULL;
3713
3714 for (i = 0; i < seg->nsects; i++)
3715 {
3716 bfd_vma segoff;
3717 asection *sec;
3718
3719 if (wide)
3720 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
3721 + (i * BFD_MACH_O_SECTION_64_SIZE);
3722 else
3723 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
3724 + (i * BFD_MACH_O_SECTION_SIZE);
3725
3726 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
3727 if (sec == NULL)
3728 return -1;
3729
3730 bfd_mach_o_append_section_to_segment (seg, sec);
3731 }
3732
3733 return 0;
3734 }
3735
3736 static int
3737 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
3738 {
3739 return bfd_mach_o_read_segment (abfd, command, 0);
3740 }
3741
3742 static int
3743 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
3744 {
3745 return bfd_mach_o_read_segment (abfd, command, 1);
3746 }
3747
3748 static int
3749 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
3750 {
3751 struct mach_o_load_command_external raw;
3752 unsigned int cmd;
3753
3754 /* Read command type and length. */
3755 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
3756 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
3757 return -1;
3758
3759 cmd = bfd_h_get_32 (abfd, raw.cmd);
3760 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
3761 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
3762 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
3763
3764 switch (command->type)
3765 {
3766 case BFD_MACH_O_LC_SEGMENT:
3767 if (bfd_mach_o_read_segment_32 (abfd, command) != 0)
3768 return -1;
3769 break;
3770 case BFD_MACH_O_LC_SEGMENT_64:
3771 if (bfd_mach_o_read_segment_64 (abfd, command) != 0)
3772 return -1;
3773 break;
3774 case BFD_MACH_O_LC_SYMTAB:
3775 if (bfd_mach_o_read_symtab (abfd, command) != 0)
3776 return -1;
3777 break;
3778 case BFD_MACH_O_LC_SYMSEG:
3779 break;
3780 case BFD_MACH_O_LC_THREAD:
3781 case BFD_MACH_O_LC_UNIXTHREAD:
3782 if (bfd_mach_o_read_thread (abfd, command) != 0)
3783 return -1;
3784 break;
3785 case BFD_MACH_O_LC_LOAD_DYLINKER:
3786 case BFD_MACH_O_LC_ID_DYLINKER:
3787 if (bfd_mach_o_read_dylinker (abfd, command) != 0)
3788 return -1;
3789 break;
3790 case BFD_MACH_O_LC_LOAD_DYLIB:
3791 case BFD_MACH_O_LC_ID_DYLIB:
3792 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3793 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3794 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3795 if (bfd_mach_o_read_dylib (abfd, command) != 0)
3796 return -1;
3797 break;
3798 case BFD_MACH_O_LC_PREBOUND_DYLIB:
3799 if (bfd_mach_o_read_prebound_dylib (abfd, command) != 0)
3800 return -1;
3801 break;
3802 case BFD_MACH_O_LC_LOADFVMLIB:
3803 case BFD_MACH_O_LC_IDFVMLIB:
3804 if (bfd_mach_o_read_fvmlib (abfd, command) != 0)
3805 return -1;
3806 break;
3807 case BFD_MACH_O_LC_IDENT:
3808 case BFD_MACH_O_LC_FVMFILE:
3809 case BFD_MACH_O_LC_PREPAGE:
3810 case BFD_MACH_O_LC_ROUTINES:
3811 case BFD_MACH_O_LC_ROUTINES_64:
3812 break;
3813 case BFD_MACH_O_LC_SUB_FRAMEWORK:
3814 case BFD_MACH_O_LC_SUB_UMBRELLA:
3815 case BFD_MACH_O_LC_SUB_LIBRARY:
3816 case BFD_MACH_O_LC_SUB_CLIENT:
3817 case BFD_MACH_O_LC_RPATH:
3818 if (bfd_mach_o_read_str (abfd, command) != 0)
3819 return -1;
3820 break;
3821 case BFD_MACH_O_LC_DYSYMTAB:
3822 if (bfd_mach_o_read_dysymtab (abfd, command) != 0)
3823 return -1;
3824 break;
3825 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
3826 case BFD_MACH_O_LC_PREBIND_CKSUM:
3827 break;
3828 case BFD_MACH_O_LC_UUID:
3829 if (bfd_mach_o_read_uuid (abfd, command) != 0)
3830 return -1;
3831 break;
3832 case BFD_MACH_O_LC_CODE_SIGNATURE:
3833 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
3834 case BFD_MACH_O_LC_FUNCTION_STARTS:
3835 if (bfd_mach_o_read_linkedit (abfd, command) != 0)
3836 return -1;
3837 break;
3838 case BFD_MACH_O_LC_ENCRYPTION_INFO:
3839 if (!bfd_mach_o_read_encryption_info (abfd, command))
3840 return -1;
3841 break;
3842 case BFD_MACH_O_LC_DYLD_INFO:
3843 if (bfd_mach_o_read_dyld_info (abfd, command) != 0)
3844 return -1;
3845 break;
3846 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
3847 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
3848 if (!bfd_mach_o_read_version_min (abfd, command))
3849 return -1;
3850 break;
3851 default:
3852 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
3853 abfd, (unsigned long) command->type);
3854 break;
3855 }
3856
3857 return 0;
3858 }
3859
3860 static void
3861 bfd_mach_o_flatten_sections (bfd *abfd)
3862 {
3863 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3864 long csect = 0;
3865 unsigned long i;
3866
3867 /* Count total number of sections. */
3868 mdata->nsects = 0;
3869
3870 for (i = 0; i < mdata->header.ncmds; i++)
3871 {
3872 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
3873 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
3874 {
3875 bfd_mach_o_segment_command *seg;
3876
3877 seg = &mdata->commands[i].command.segment;
3878 mdata->nsects += seg->nsects;
3879 }
3880 }
3881
3882 /* Allocate sections array. */
3883 mdata->sections = bfd_alloc (abfd,
3884 mdata->nsects * sizeof (bfd_mach_o_section *));
3885
3886 /* Fill the array. */
3887 csect = 0;
3888
3889 for (i = 0; i < mdata->header.ncmds; i++)
3890 {
3891 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
3892 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
3893 {
3894 bfd_mach_o_segment_command *seg;
3895 bfd_mach_o_section *sec;
3896
3897 seg = &mdata->commands[i].command.segment;
3898 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
3899
3900 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
3901 mdata->sections[csect++] = sec;
3902 }
3903 }
3904 }
3905
3906 static bfd_boolean
3907 bfd_mach_o_scan_start_address (bfd *abfd)
3908 {
3909 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3910 bfd_mach_o_thread_command *cmd = NULL;
3911 unsigned long i;
3912
3913 for (i = 0; i < mdata->header.ncmds; i++)
3914 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
3915 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
3916 {
3917 cmd = &mdata->commands[i].command.thread;
3918 break;
3919 }
3920
3921 if (cmd == NULL)
3922 return FALSE;
3923
3924 /* FIXME: create a subtarget hook ? */
3925 for (i = 0; i < cmd->nflavours; i++)
3926 {
3927 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
3928 && (cmd->flavours[i].flavour
3929 == (unsigned long) BFD_MACH_O_x86_THREAD_STATE32))
3930 {
3931 unsigned char buf[4];
3932
3933 if (bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET) != 0
3934 || bfd_bread (buf, 4, abfd) != 4)
3935 return FALSE;
3936
3937 abfd->start_address = bfd_h_get_32 (abfd, buf);
3938 }
3939 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
3940 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
3941 {
3942 unsigned char buf[4];
3943
3944 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
3945 || bfd_bread (buf, 4, abfd) != 4)
3946 return FALSE;
3947
3948 abfd->start_address = bfd_h_get_32 (abfd, buf);
3949 }
3950 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
3951 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
3952 {
3953 unsigned char buf[8];
3954
3955 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
3956 || bfd_bread (buf, 8, abfd) != 8)
3957 return FALSE;
3958
3959 abfd->start_address = bfd_h_get_64 (abfd, buf);
3960 }
3961 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
3962 && (cmd->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
3963 {
3964 unsigned char buf[8];
3965
3966 if (bfd_seek (abfd, cmd->flavours[i].offset + (16 * 8), SEEK_SET) != 0
3967 || bfd_bread (buf, 8, abfd) != 8)
3968 return FALSE;
3969
3970 abfd->start_address = bfd_h_get_64 (abfd, buf);
3971 }
3972 }
3973
3974 return TRUE;
3975 }
3976
3977 bfd_boolean
3978 bfd_mach_o_set_arch_mach (bfd *abfd,
3979 enum bfd_architecture arch,
3980 unsigned long machine)
3981 {
3982 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
3983
3984 /* If this isn't the right architecture for this backend, and this
3985 isn't the generic backend, fail. */
3986 if (arch != bed->arch
3987 && arch != bfd_arch_unknown
3988 && bed->arch != bfd_arch_unknown)
3989 return FALSE;
3990
3991 return bfd_default_set_arch_mach (abfd, arch, machine);
3992 }
3993
3994 static bfd_boolean
3995 bfd_mach_o_scan (bfd *abfd,
3996 bfd_mach_o_header *header,
3997 bfd_mach_o_data_struct *mdata)
3998 {
3999 unsigned int i;
4000 enum bfd_architecture cputype;
4001 unsigned long cpusubtype;
4002 unsigned int hdrsize;
4003
4004 hdrsize = mach_o_wide_p (header) ?
4005 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4006
4007 mdata->header = *header;
4008
4009 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4010 switch (header->filetype)
4011 {
4012 case BFD_MACH_O_MH_OBJECT:
4013 abfd->flags |= HAS_RELOC;
4014 break;
4015 case BFD_MACH_O_MH_EXECUTE:
4016 abfd->flags |= EXEC_P;
4017 break;
4018 case BFD_MACH_O_MH_DYLIB:
4019 case BFD_MACH_O_MH_BUNDLE:
4020 abfd->flags |= DYNAMIC;
4021 break;
4022 }
4023
4024 abfd->tdata.mach_o_data = mdata;
4025
4026 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4027 &cputype, &cpusubtype);
4028 if (cputype == bfd_arch_unknown)
4029 {
4030 (*_bfd_error_handler)
4031 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4032 header->cputype, header->cpusubtype);
4033 return FALSE;
4034 }
4035
4036 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4037
4038 if (header->ncmds != 0)
4039 {
4040 mdata->commands = bfd_alloc
4041 (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4042 if (mdata->commands == NULL)
4043 return FALSE;
4044
4045 for (i = 0; i < header->ncmds; i++)
4046 {
4047 bfd_mach_o_load_command *cur = &mdata->commands[i];
4048
4049 if (i == 0)
4050 cur->offset = hdrsize;
4051 else
4052 {
4053 bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
4054 cur->offset = prev->offset + prev->len;
4055 }
4056
4057 if (bfd_mach_o_read_command (abfd, cur) < 0)
4058 return FALSE;
4059 }
4060 }
4061
4062 if (bfd_mach_o_scan_start_address (abfd) < 0)
4063 return FALSE;
4064
4065 bfd_mach_o_flatten_sections (abfd);
4066 return TRUE;
4067 }
4068
4069 bfd_boolean
4070 bfd_mach_o_mkobject_init (bfd *abfd)
4071 {
4072 bfd_mach_o_data_struct *mdata = NULL;
4073
4074 mdata = bfd_alloc (abfd, sizeof (bfd_mach_o_data_struct));
4075 if (mdata == NULL)
4076 return FALSE;
4077 abfd->tdata.mach_o_data = mdata;
4078
4079 mdata->header.magic = 0;
4080 mdata->header.cputype = 0;
4081 mdata->header.cpusubtype = 0;
4082 mdata->header.filetype = 0;
4083 mdata->header.ncmds = 0;
4084 mdata->header.sizeofcmds = 0;
4085 mdata->header.flags = 0;
4086 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4087 mdata->commands = NULL;
4088 mdata->nsects = 0;
4089 mdata->sections = NULL;
4090 mdata->dyn_reloc_cache = NULL;
4091
4092 return TRUE;
4093 }
4094
4095 static bfd_boolean
4096 bfd_mach_o_gen_mkobject (bfd *abfd)
4097 {
4098 bfd_mach_o_data_struct *mdata;
4099
4100 if (!bfd_mach_o_mkobject_init (abfd))
4101 return FALSE;
4102
4103 mdata = bfd_mach_o_get_data (abfd);
4104 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4105 mdata->header.cputype = 0;
4106 mdata->header.cpusubtype = 0;
4107 mdata->header.byteorder = abfd->xvec->byteorder;
4108 mdata->header.version = 1;
4109
4110 return TRUE;
4111 }
4112
4113 const bfd_target *
4114 bfd_mach_o_header_p (bfd *abfd,
4115 bfd_mach_o_filetype filetype,
4116 bfd_mach_o_cpu_type cputype)
4117 {
4118 struct bfd_preserve preserve;
4119 bfd_mach_o_header header;
4120
4121 preserve.marker = NULL;
4122 if (!bfd_mach_o_read_header (abfd, &header))
4123 goto wrong;
4124
4125 if (! (header.byteorder == BFD_ENDIAN_BIG
4126 || header.byteorder == BFD_ENDIAN_LITTLE))
4127 {
4128 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4129 (unsigned long) header.byteorder);
4130 goto wrong;
4131 }
4132
4133 if (! ((header.byteorder == BFD_ENDIAN_BIG
4134 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4135 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4136 || (header.byteorder == BFD_ENDIAN_LITTLE
4137 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4138 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4139 goto wrong;
4140
4141 /* Check cputype and filetype.
4142 In case of wildcard, do not accept magics that are handled by existing
4143 targets. */
4144 if (cputype)
4145 {
4146 if (header.cputype != cputype)
4147 goto wrong;
4148 }
4149
4150 if (filetype)
4151 {
4152 if (header.filetype != filetype)
4153 goto wrong;
4154 }
4155 else
4156 {
4157 switch (header.filetype)
4158 {
4159 case BFD_MACH_O_MH_CORE:
4160 /* Handled by core_p */
4161 goto wrong;
4162 default:
4163 break;
4164 }
4165 }
4166
4167 preserve.marker = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4168 if (preserve.marker == NULL
4169 || !bfd_preserve_save (abfd, &preserve))
4170 goto fail;
4171
4172 if (!bfd_mach_o_scan (abfd, &header,
4173 (bfd_mach_o_data_struct *) preserve.marker))
4174 goto wrong;
4175
4176 bfd_preserve_finish (abfd, &preserve);
4177 return abfd->xvec;
4178
4179 wrong:
4180 bfd_set_error (bfd_error_wrong_format);
4181
4182 fail:
4183 if (preserve.marker != NULL)
4184 bfd_preserve_restore (abfd, &preserve);
4185 return NULL;
4186 }
4187
4188 static const bfd_target *
4189 bfd_mach_o_gen_object_p (bfd *abfd)
4190 {
4191 return bfd_mach_o_header_p (abfd, 0, 0);
4192 }
4193
4194 static const bfd_target *
4195 bfd_mach_o_gen_core_p (bfd *abfd)
4196 {
4197 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
4198 }
4199
4200 typedef struct mach_o_fat_archentry
4201 {
4202 unsigned long cputype;
4203 unsigned long cpusubtype;
4204 unsigned long offset;
4205 unsigned long size;
4206 unsigned long align;
4207 } mach_o_fat_archentry;
4208
4209 typedef struct mach_o_fat_data_struct
4210 {
4211 unsigned long magic;
4212 unsigned long nfat_arch;
4213 mach_o_fat_archentry *archentries;
4214 } mach_o_fat_data_struct;
4215
4216 const bfd_target *
4217 bfd_mach_o_archive_p (bfd *abfd)
4218 {
4219 mach_o_fat_data_struct *adata = NULL;
4220 struct mach_o_fat_header_external hdr;
4221 unsigned long i;
4222
4223 if (bfd_seek (abfd, 0, SEEK_SET) != 0
4224 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
4225 goto error;
4226
4227 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
4228 if (adata == NULL)
4229 goto error;
4230
4231 adata->magic = bfd_getb32 (hdr.magic);
4232 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
4233 if (adata->magic != 0xcafebabe)
4234 goto error;
4235 /* Avoid matching Java bytecode files, which have the same magic number.
4236 In the Java bytecode file format this field contains the JVM version,
4237 which starts at 43.0. */
4238 if (adata->nfat_arch > 30)
4239 goto error;
4240
4241 adata->archentries =
4242 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
4243 if (adata->archentries == NULL)
4244 goto error;
4245
4246 for (i = 0; i < adata->nfat_arch; i++)
4247 {
4248 struct mach_o_fat_arch_external arch;
4249 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
4250 goto error;
4251 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
4252 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
4253 adata->archentries[i].offset = bfd_getb32 (arch.offset);
4254 adata->archentries[i].size = bfd_getb32 (arch.size);
4255 adata->archentries[i].align = bfd_getb32 (arch.align);
4256 }
4257
4258 abfd->tdata.mach_o_fat_data = adata;
4259 return abfd->xvec;
4260
4261 error:
4262 if (adata != NULL)
4263 bfd_release (abfd, adata);
4264 bfd_set_error (bfd_error_wrong_format);
4265 return NULL;
4266 }
4267
4268 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
4269 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
4270 Set arelt_data and origin fields too. */
4271
4272 static void
4273 bfd_mach_o_fat_member_init (bfd *abfd,
4274 enum bfd_architecture arch_type,
4275 unsigned long arch_subtype,
4276 mach_o_fat_archentry *entry)
4277 {
4278 struct areltdata *areltdata;
4279 /* Create the member filename. Use ARCH_NAME. */
4280 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
4281
4282 if (ap)
4283 {
4284 /* Use the architecture name if known. */
4285 abfd->filename = ap->printable_name;
4286 }
4287 else
4288 {
4289 /* Forge a uniq id. */
4290 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
4291 char *name = bfd_alloc (abfd, namelen);
4292 snprintf (name, namelen, "0x%lx-0x%lx",
4293 entry->cputype, entry->cpusubtype);
4294 abfd->filename = name;
4295 }
4296
4297 areltdata = bfd_zalloc (abfd, sizeof (struct areltdata));
4298 areltdata->parsed_size = entry->size;
4299 abfd->arelt_data = areltdata;
4300 abfd->iostream = NULL;
4301 abfd->origin = entry->offset;
4302 }
4303
4304 bfd *
4305 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
4306 {
4307 mach_o_fat_data_struct *adata;
4308 mach_o_fat_archentry *entry = NULL;
4309 unsigned long i;
4310 bfd *nbfd;
4311 enum bfd_architecture arch_type;
4312 unsigned long arch_subtype;
4313
4314 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
4315 BFD_ASSERT (adata != NULL);
4316
4317 /* Find index of previous entry. */
4318 if (prev == NULL)
4319 {
4320 /* Start at first one. */
4321 i = 0;
4322 }
4323 else
4324 {
4325 /* Find index of PREV. */
4326 for (i = 0; i < adata->nfat_arch; i++)
4327 {
4328 if (adata->archentries[i].offset == prev->origin)
4329 break;
4330 }
4331
4332 if (i == adata->nfat_arch)
4333 {
4334 /* Not found. */
4335 bfd_set_error (bfd_error_bad_value);
4336 return NULL;
4337 }
4338
4339 /* Get next entry. */
4340 i++;
4341 }
4342
4343 if (i >= adata->nfat_arch)
4344 {
4345 bfd_set_error (bfd_error_no_more_archived_files);
4346 return NULL;
4347 }
4348
4349 entry = &adata->archentries[i];
4350 nbfd = _bfd_new_bfd_contained_in (archive);
4351 if (nbfd == NULL)
4352 return NULL;
4353
4354 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
4355 &arch_type, &arch_subtype);
4356
4357 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
4358
4359 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
4360
4361 return nbfd;
4362 }
4363
4364 /* Analogous to stat call. */
4365
4366 static int
4367 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
4368 {
4369 if (abfd->arelt_data == NULL)
4370 {
4371 bfd_set_error (bfd_error_invalid_operation);
4372 return -1;
4373 }
4374
4375 buf->st_mtime = 0;
4376 buf->st_uid = 0;
4377 buf->st_gid = 0;
4378 buf->st_mode = 0644;
4379 buf->st_size = arelt_size (abfd);
4380
4381 return 0;
4382 }
4383
4384 /* If ABFD format is FORMAT and architecture is ARCH, return it.
4385 If ABFD is a fat image containing a member that corresponds to FORMAT
4386 and ARCH, returns it.
4387 In other case, returns NULL.
4388 This function allows transparent uses of fat images. */
4389
4390 bfd *
4391 bfd_mach_o_fat_extract (bfd *abfd,
4392 bfd_format format,
4393 const bfd_arch_info_type *arch)
4394 {
4395 bfd *res;
4396 mach_o_fat_data_struct *adata;
4397 unsigned int i;
4398
4399 if (bfd_check_format (abfd, format))
4400 {
4401 if (bfd_get_arch_info (abfd) == arch)
4402 return abfd;
4403 return NULL;
4404 }
4405 if (!bfd_check_format (abfd, bfd_archive)
4406 || abfd->xvec != &mach_o_fat_vec)
4407 return NULL;
4408
4409 /* This is a Mach-O fat image. */
4410 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
4411 BFD_ASSERT (adata != NULL);
4412
4413 for (i = 0; i < adata->nfat_arch; i++)
4414 {
4415 struct mach_o_fat_archentry *e = &adata->archentries[i];
4416 enum bfd_architecture cpu_type;
4417 unsigned long cpu_subtype;
4418
4419 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
4420 &cpu_type, &cpu_subtype);
4421 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
4422 continue;
4423
4424 /* The architecture is found. */
4425 res = _bfd_new_bfd_contained_in (abfd);
4426 if (res == NULL)
4427 return NULL;
4428
4429 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
4430
4431 if (bfd_check_format (res, format))
4432 {
4433 BFD_ASSERT (bfd_get_arch_info (res) == arch);
4434 return res;
4435 }
4436 bfd_close (res);
4437 return NULL;
4438 }
4439
4440 return NULL;
4441 }
4442
4443 int
4444 bfd_mach_o_lookup_command (bfd *abfd,
4445 bfd_mach_o_load_command_type type,
4446 bfd_mach_o_load_command **mcommand)
4447 {
4448 struct mach_o_data_struct *md = bfd_mach_o_get_data (abfd);
4449 bfd_mach_o_load_command *ncmd = NULL;
4450 unsigned int i, num;
4451
4452 BFD_ASSERT (md != NULL);
4453 BFD_ASSERT (mcommand != NULL);
4454
4455 num = 0;
4456 for (i = 0; i < md->header.ncmds; i++)
4457 {
4458 struct bfd_mach_o_load_command *cmd = &md->commands[i];
4459
4460 if (cmd->type != type)
4461 continue;
4462
4463 if (num == 0)
4464 ncmd = cmd;
4465 num++;
4466 }
4467
4468 *mcommand = ncmd;
4469 return num;
4470 }
4471
4472 unsigned long
4473 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
4474 {
4475 switch (type)
4476 {
4477 case BFD_MACH_O_CPU_TYPE_MC680x0:
4478 return 0x04000000;
4479 case BFD_MACH_O_CPU_TYPE_MC88000:
4480 return 0xffffe000;
4481 case BFD_MACH_O_CPU_TYPE_POWERPC:
4482 return 0xc0000000;
4483 case BFD_MACH_O_CPU_TYPE_I386:
4484 return 0xc0000000;
4485 case BFD_MACH_O_CPU_TYPE_SPARC:
4486 return 0xf0000000;
4487 case BFD_MACH_O_CPU_TYPE_I860:
4488 return 0;
4489 case BFD_MACH_O_CPU_TYPE_HPPA:
4490 return 0xc0000000 - 0x04000000;
4491 default:
4492 return 0;
4493 }
4494 }
4495
4496 /* The following two tables should be kept, as far as possible, in order of
4497 most frequently used entries to optimize their use from gas. */
4498
4499 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
4500 {
4501 { "regular", BFD_MACH_O_S_REGULAR},
4502 { "coalesced", BFD_MACH_O_S_COALESCED},
4503 { "zerofill", BFD_MACH_O_S_ZEROFILL},
4504 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
4505 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
4506 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
4507 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
4508 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
4509 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
4510 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
4511 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
4512 { "interposing", BFD_MACH_O_S_INTERPOSING},
4513 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
4514 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
4515 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
4516 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
4517 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
4518 { NULL, 0}
4519 };
4520
4521 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
4522 {
4523 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
4524 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
4525 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
4526 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
4527 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
4528 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
4529 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
4530 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
4531 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
4532 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4533 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4534 { NULL, 0}
4535 };
4536
4537 /* Get the section type from NAME. Return 256 if NAME is unknown. */
4538
4539 unsigned int
4540 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
4541 {
4542 const bfd_mach_o_xlat_name *x;
4543 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4544
4545 for (x = bfd_mach_o_section_type_name; x->name; x++)
4546 if (strcmp (x->name, name) == 0)
4547 {
4548 /* We found it... does the target support it? */
4549 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
4550 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
4551 return x->val; /* OK. */
4552 else
4553 break; /* Not supported. */
4554 }
4555 /* Maximum section ID = 0xff. */
4556 return 256;
4557 }
4558
4559 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
4560
4561 unsigned int
4562 bfd_mach_o_get_section_attribute_from_name (const char *name)
4563 {
4564 const bfd_mach_o_xlat_name *x;
4565
4566 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
4567 if (strcmp (x->name, name) == 0)
4568 return x->val;
4569 return (unsigned int)-1;
4570 }
4571
4572 int
4573 bfd_mach_o_core_fetch_environment (bfd *abfd,
4574 unsigned char **rbuf,
4575 unsigned int *rlen)
4576 {
4577 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4578 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
4579 unsigned int i = 0;
4580
4581 for (i = 0; i < mdata->header.ncmds; i++)
4582 {
4583 bfd_mach_o_load_command *cur = &mdata->commands[i];
4584 bfd_mach_o_segment_command *seg = NULL;
4585
4586 if (cur->type != BFD_MACH_O_LC_SEGMENT)
4587 continue;
4588
4589 seg = &cur->command.segment;
4590
4591 if ((seg->vmaddr + seg->vmsize) == stackaddr)
4592 {
4593 unsigned long start = seg->fileoff;
4594 unsigned long end = seg->fileoff + seg->filesize;
4595 unsigned char *buf = bfd_malloc (1024);
4596 unsigned long size = 1024;
4597
4598 for (;;)
4599 {
4600 bfd_size_type nread = 0;
4601 unsigned long offset;
4602 int found_nonnull = 0;
4603
4604 if (size > (end - start))
4605 size = (end - start);
4606
4607 buf = bfd_realloc_or_free (buf, size);
4608 if (buf == NULL)
4609 return -1;
4610
4611 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
4612 {
4613 free (buf);
4614 return -1;
4615 }
4616
4617 nread = bfd_bread (buf, size, abfd);
4618
4619 if (nread != size)
4620 {
4621 free (buf);
4622 return -1;
4623 }
4624
4625 for (offset = 4; offset <= size; offset += 4)
4626 {
4627 unsigned long val;
4628
4629 val = *((unsigned long *) (buf + size - offset));
4630 if (! found_nonnull)
4631 {
4632 if (val != 0)
4633 found_nonnull = 1;
4634 }
4635 else if (val == 0x0)
4636 {
4637 unsigned long bottom;
4638 unsigned long top;
4639
4640 bottom = seg->fileoff + seg->filesize - offset;
4641 top = seg->fileoff + seg->filesize - 4;
4642 *rbuf = bfd_malloc (top - bottom);
4643 *rlen = top - bottom;
4644
4645 memcpy (*rbuf, buf + size - *rlen, *rlen);
4646 free (buf);
4647 return 0;
4648 }
4649 }
4650
4651 if (size == (end - start))
4652 break;
4653
4654 size *= 2;
4655 }
4656
4657 free (buf);
4658 }
4659 }
4660
4661 return -1;
4662 }
4663
4664 char *
4665 bfd_mach_o_core_file_failing_command (bfd *abfd)
4666 {
4667 unsigned char *buf = NULL;
4668 unsigned int len = 0;
4669 int ret = -1;
4670
4671 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
4672 if (ret < 0)
4673 return NULL;
4674
4675 return (char *) buf;
4676 }
4677
4678 int
4679 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
4680 {
4681 return 0;
4682 }
4683
4684 static bfd_mach_o_uuid_command *
4685 bfd_mach_o_lookup_uuid_command (bfd *abfd)
4686 {
4687 bfd_mach_o_load_command *uuid_cmd;
4688 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
4689 if (ncmd != 1)
4690 return FALSE;
4691 return &uuid_cmd->command.uuid;
4692 }
4693
4694 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
4695
4696 static bfd_boolean
4697 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
4698 {
4699 bfd_mach_o_uuid_command *dsym_uuid_cmd;
4700
4701 BFD_ASSERT (abfd);
4702 BFD_ASSERT (uuid_cmd);
4703
4704 if (!bfd_check_format (abfd, bfd_object))
4705 return FALSE;
4706
4707 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
4708 || bfd_mach_o_get_data (abfd) == NULL
4709 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
4710 return FALSE;
4711
4712 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4713 if (dsym_uuid_cmd == NULL)
4714 return FALSE;
4715
4716 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
4717 sizeof (uuid_cmd->uuid)) != 0)
4718 return FALSE;
4719
4720 return TRUE;
4721 }
4722
4723 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
4724 The caller is responsible for closing the returned BFD object and
4725 its my_archive if the returned BFD is in a fat dSYM. */
4726
4727 static bfd *
4728 bfd_mach_o_find_dsym (const char *dsym_filename,
4729 const bfd_mach_o_uuid_command *uuid_cmd,
4730 const bfd_arch_info_type *arch)
4731 {
4732 bfd *base_dsym_bfd, *dsym_bfd;
4733
4734 BFD_ASSERT (uuid_cmd);
4735
4736 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
4737 if (base_dsym_bfd == NULL)
4738 return NULL;
4739
4740 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
4741 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
4742 return dsym_bfd;
4743
4744 bfd_close (dsym_bfd);
4745 if (base_dsym_bfd != dsym_bfd)
4746 bfd_close (base_dsym_bfd);
4747
4748 return NULL;
4749 }
4750
4751 /* Return a BFD created from a dSYM file for ABFD.
4752 The caller is responsible for closing the returned BFD object, its
4753 filename, and its my_archive if the returned BFD is in a fat dSYM. */
4754
4755 static bfd *
4756 bfd_mach_o_follow_dsym (bfd *abfd)
4757 {
4758 char *dsym_filename;
4759 bfd_mach_o_uuid_command *uuid_cmd;
4760 bfd *dsym_bfd, *base_bfd = abfd;
4761 const char *base_basename;
4762
4763 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
4764 return NULL;
4765
4766 if (abfd->my_archive)
4767 base_bfd = abfd->my_archive;
4768 /* BFD may have been opened from a stream. */
4769 if (base_bfd->filename == NULL)
4770 {
4771 bfd_set_error (bfd_error_invalid_operation);
4772 return NULL;
4773 }
4774 base_basename = lbasename (base_bfd->filename);
4775
4776 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4777 if (uuid_cmd == NULL)
4778 return NULL;
4779
4780 /* TODO: We assume the DWARF file has the same as the binary's.
4781 It seems apple's GDB checks all files in the dSYM bundle directory.
4782 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
4783 */
4784 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
4785 + strlen (dsym_subdir) + 1
4786 + strlen (base_basename) + 1);
4787 sprintf (dsym_filename, "%s%s/%s",
4788 base_bfd->filename, dsym_subdir, base_basename);
4789
4790 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
4791 bfd_get_arch_info (abfd));
4792 if (dsym_bfd == NULL)
4793 free (dsym_filename);
4794
4795 return dsym_bfd;
4796 }
4797
4798 bfd_boolean
4799 bfd_mach_o_find_nearest_line (bfd *abfd,
4800 asection *section,
4801 asymbol **symbols,
4802 bfd_vma offset,
4803 const char **filename_ptr,
4804 const char **functionname_ptr,
4805 unsigned int *line_ptr)
4806 {
4807 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4808 if (mdata == NULL)
4809 return FALSE;
4810 switch (mdata->header.filetype)
4811 {
4812 case BFD_MACH_O_MH_OBJECT:
4813 break;
4814 case BFD_MACH_O_MH_EXECUTE:
4815 case BFD_MACH_O_MH_DYLIB:
4816 case BFD_MACH_O_MH_BUNDLE:
4817 case BFD_MACH_O_MH_KEXT_BUNDLE:
4818 if (mdata->dwarf2_find_line_info == NULL)
4819 {
4820 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
4821 /* When we couldn't find dSYM for this binary, we look for
4822 the debug information in the binary itself. In this way,
4823 we won't try finding separated dSYM again because
4824 mdata->dwarf2_find_line_info will be filled. */
4825 if (! mdata->dsym_bfd)
4826 break;
4827 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
4828 dwarf_debug_sections, symbols,
4829 &mdata->dwarf2_find_line_info))
4830 return FALSE;
4831 }
4832 break;
4833 default:
4834 return FALSE;
4835 }
4836 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
4837 section, symbols, offset,
4838 filename_ptr, functionname_ptr,
4839 line_ptr, NULL, 0,
4840 &mdata->dwarf2_find_line_info))
4841 return TRUE;
4842 return FALSE;
4843 }
4844
4845 bfd_boolean
4846 bfd_mach_o_close_and_cleanup (bfd *abfd)
4847 {
4848 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4849 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
4850 {
4851 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
4852 bfd_mach_o_free_cached_info (abfd);
4853 if (mdata->dsym_bfd != NULL)
4854 {
4855 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
4856 char *dsym_filename = (char *)(fat_bfd
4857 ? fat_bfd->filename
4858 : mdata->dsym_bfd->filename);
4859 bfd_close (mdata->dsym_bfd);
4860 mdata->dsym_bfd = NULL;
4861 if (fat_bfd)
4862 bfd_close (fat_bfd);
4863 free (dsym_filename);
4864 }
4865 }
4866
4867 return _bfd_generic_close_and_cleanup (abfd);
4868 }
4869
4870 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
4871 {
4872 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4873 asection *asect;
4874 free (mdata->dyn_reloc_cache);
4875 mdata->dyn_reloc_cache = NULL;
4876 for (asect = abfd->sections; asect != NULL; asect = asect->next)
4877 {
4878 free (asect->relocation);
4879 asect->relocation = NULL;
4880 }
4881
4882 return TRUE;
4883 }
4884
4885 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
4886 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
4887
4888 #define bfd_mach_o_swap_reloc_in NULL
4889 #define bfd_mach_o_swap_reloc_out NULL
4890 #define bfd_mach_o_print_thread NULL
4891 #define bfd_mach_o_tgt_seg_table NULL
4892 #define bfd_mach_o_section_type_valid_for_tgt NULL
4893
4894 #define TARGET_NAME mach_o_be_vec
4895 #define TARGET_STRING "mach-o-be"
4896 #define TARGET_ARCHITECTURE bfd_arch_unknown
4897 #define TARGET_BIG_ENDIAN 1
4898 #define TARGET_ARCHIVE 0
4899 #define TARGET_PRIORITY 1
4900 #include "mach-o-target.c"
4901
4902 #undef TARGET_NAME
4903 #undef TARGET_STRING
4904 #undef TARGET_ARCHITECTURE
4905 #undef TARGET_BIG_ENDIAN
4906 #undef TARGET_ARCHIVE
4907 #undef TARGET_PRIORITY
4908
4909 #define TARGET_NAME mach_o_le_vec
4910 #define TARGET_STRING "mach-o-le"
4911 #define TARGET_ARCHITECTURE bfd_arch_unknown
4912 #define TARGET_BIG_ENDIAN 0
4913 #define TARGET_ARCHIVE 0
4914 #define TARGET_PRIORITY 1
4915
4916 #include "mach-o-target.c"
4917
4918 #undef TARGET_NAME
4919 #undef TARGET_STRING
4920 #undef TARGET_ARCHITECTURE
4921 #undef TARGET_BIG_ENDIAN
4922 #undef TARGET_ARCHIVE
4923 #undef TARGET_PRIORITY
4924
4925 /* Not yet handled: creating an archive. */
4926 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
4927
4928 /* Not used. */
4929 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
4930 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
4931 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
4932 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
4933 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
4934 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
4935 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
4936 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
4937 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
4938 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
4939
4940 #define TARGET_NAME mach_o_fat_vec
4941 #define TARGET_STRING "mach-o-fat"
4942 #define TARGET_ARCHITECTURE bfd_arch_unknown
4943 #define TARGET_BIG_ENDIAN 1
4944 #define TARGET_ARCHIVE 1
4945 #define TARGET_PRIORITY 0
4946
4947 #include "mach-o-target.c"
4948
4949 #undef TARGET_NAME
4950 #undef TARGET_STRING
4951 #undef TARGET_ARCHITECTURE
4952 #undef TARGET_BIG_ENDIAN
4953 #undef TARGET_ARCHIVE
4954 #undef TARGET_PRIORITY
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