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Fixes for memory access violations exposed by fuzzinf various binaries.
[thirdparty/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2014 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
39
40 static bfd_boolean
41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
42
43 unsigned int
44 bfd_mach_o_version (bfd *abfd)
45 {
46 bfd_mach_o_data_struct *mdata = NULL;
47
48 BFD_ASSERT (bfd_mach_o_valid (abfd));
49 mdata = bfd_mach_o_get_data (abfd);
50
51 return mdata->header.version;
52 }
53
54 bfd_boolean
55 bfd_mach_o_valid (bfd *abfd)
56 {
57 if (abfd == NULL || abfd->xvec == NULL)
58 return FALSE;
59
60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
61 return FALSE;
62
63 if (bfd_mach_o_get_data (abfd) == NULL)
64 return FALSE;
65 return TRUE;
66 }
67
68 static INLINE bfd_boolean
69 mach_o_wide_p (bfd_mach_o_header *header)
70 {
71 switch (header->version)
72 {
73 case 1:
74 return FALSE;
75 case 2:
76 return TRUE;
77 default:
78 BFD_FAIL ();
79 return FALSE;
80 }
81 }
82
83 static INLINE bfd_boolean
84 bfd_mach_o_wide_p (bfd *abfd)
85 {
86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
87 }
88
89 /* Tables to translate well known Mach-O segment/section names to bfd
90 names. Use of canonical names (such as .text or .debug_frame) is required
91 by gdb. */
92
93 /* __TEXT Segment. */
94 static const mach_o_section_name_xlat text_section_names_xlat[] =
95 {
96 { ".text", "__text",
97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
99 { ".const", "__const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".static_const", "__static_const",
103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
104 BFD_MACH_O_S_ATTR_NONE, 0},
105 { ".cstring", "__cstring",
106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
107 BFD_MACH_O_S_CSTRING_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 0},
109 { ".literal4", "__literal4",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 2},
112 { ".literal8", "__literal8",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 3},
115 { ".literal16", "__literal16",
116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
117 BFD_MACH_O_S_ATTR_NONE, 4},
118 { ".constructor", "__constructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".destructor", "__destructor",
122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
123 BFD_MACH_O_S_ATTR_NONE, 0},
124 { ".eh_frame", "__eh_frame",
125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
128 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
129 { NULL, NULL, 0, 0, 0, 0}
130 };
131
132 /* __DATA Segment. */
133 static const mach_o_section_name_xlat data_section_names_xlat[] =
134 {
135 { ".data", "__data",
136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".bss", "__bss",
139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".const_data", "__const",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".static_data", "__static_data",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
146 BFD_MACH_O_S_ATTR_NONE, 0},
147 { ".mod_init_func", "__mod_init_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".mod_term_func", "__mod_term_func",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
152 BFD_MACH_O_S_ATTR_NONE, 2},
153 { ".dyld", "__dyld",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 0},
156 { ".cfstring", "__cfstring",
157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
158 BFD_MACH_O_S_ATTR_NONE, 2},
159 { NULL, NULL, 0, 0, 0, 0}
160 };
161
162 /* __DWARF Segment. */
163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
164 {
165 { ".debug_frame", "__debug_frame",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_info", "__debug_info",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_abbrev", "__debug_abbrev",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_aranges", "__debug_aranges",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_macinfo", "__debug_macinfo",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_line", "__debug_line",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_loc", "__debug_loc",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubnames", "__debug_pubnames",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_pubtypes", "__debug_pubtypes",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_str", "__debug_str",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_ranges", "__debug_ranges",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_macro", "__debug_macro",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { ".debug_gdb_scripts", "__debug_gdb_scri",
202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
203 BFD_MACH_O_S_ATTR_DEBUG, 0},
204 { NULL, NULL, 0, 0, 0, 0}
205 };
206
207 /* __OBJC Segment. */
208 static const mach_o_section_name_xlat objc_section_names_xlat[] =
209 {
210 { ".objc_class", "__class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_meta_class", "__meta_class",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_cls_meth", "__cat_cls_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_cat_inst_meth", "__cat_inst_meth",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_protocol", "__protocol",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_string_object", "__string_object",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_cls_meth", "__cls_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_inst_meth", "__inst_meth",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_cls_refs", "__cls_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_message_refs", "__message_refs",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_symbols", "__symbols",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_category", "__category",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_class_vars", "__class_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_instance_vars", "__instance_vars",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_module_info", "__module_info",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_selector_strs", "__selector_strs",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_image_info", "__image_info",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 { ".objc_selector_fixup", "__sel_fixup",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 /* Objc V1 */
265 { ".objc1_class_ext", "__class_ext",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_property_list", "__property",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { ".objc1_protocol_ext", "__protocol_ext",
272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
274 { NULL, NULL, 0, 0, 0, 0}
275 };
276
277 static const mach_o_segment_name_xlat segsec_names_xlat[] =
278 {
279 { "__TEXT", text_section_names_xlat },
280 { "__DATA", data_section_names_xlat },
281 { "__DWARF", dwarf_section_names_xlat },
282 { "__OBJC", objc_section_names_xlat },
283 { NULL, NULL }
284 };
285
286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
287
288 /* For both cases bfd-name => mach-o name and vice versa, the specific target
289 is checked before the generic. This allows a target (e.g. ppc for cstring)
290 to override the generic definition with a more specific one. */
291
292 /* Fetch the translation from a Mach-O section designation (segment, section)
293 as a bfd short name, if one exists. Otherwise return NULL.
294
295 Allow the segment and section names to be unterminated 16 byte arrays. */
296
297 const mach_o_section_name_xlat *
298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
299 const char *sectname)
300 {
301 const struct mach_o_segment_name_xlat *seg;
302 const mach_o_section_name_xlat *sec;
303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
304
305 /* First try any target-specific translations defined... */
306 if (bed->segsec_names_xlat)
307 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
309 for (sec = seg->sections; sec->mach_o_name; sec++)
310 if (strncmp (sec->mach_o_name, sectname,
311 BFD_MACH_O_SECTNAME_SIZE) == 0)
312 return sec;
313
314 /* ... and then the Mach-O generic ones. */
315 for (seg = segsec_names_xlat; seg->segname; seg++)
316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
317 for (sec = seg->sections; sec->mach_o_name; sec++)
318 if (strncmp (sec->mach_o_name, sectname,
319 BFD_MACH_O_SECTNAME_SIZE) == 0)
320 return sec;
321
322 return NULL;
323 }
324
325 /* If the bfd_name for this section is a 'canonical' form for which we
326 know the Mach-O data, return the segment name and the data for the
327 Mach-O equivalent. Otherwise return NULL. */
328
329 const mach_o_section_name_xlat *
330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
331 const char **segname)
332 {
333 const struct mach_o_segment_name_xlat *seg;
334 const mach_o_section_name_xlat *sec;
335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
336 *segname = NULL;
337
338 if (bfd_name[0] != '.')
339 return NULL;
340
341 /* First try any target-specific translations defined... */
342 if (bed->segsec_names_xlat)
343 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
344 for (sec = seg->sections; sec->bfd_name; sec++)
345 if (strcmp (bfd_name, sec->bfd_name) == 0)
346 {
347 *segname = seg->segname;
348 return sec;
349 }
350
351 /* ... and then the Mach-O generic ones. */
352 for (seg = segsec_names_xlat; seg->segname; seg++)
353 for (sec = seg->sections; sec->bfd_name; sec++)
354 if (strcmp (bfd_name, sec->bfd_name) == 0)
355 {
356 *segname = seg->segname;
357 return sec;
358 }
359
360 return NULL;
361 }
362
363 /* Convert Mach-O section name to BFD.
364
365 Try to use standard/canonical names, for which we have tables including
366 default flag settings - which are returned. Otherwise forge a new name
367 in the form "<segmentname>.<sectionname>" this will be prefixed with
368 LC_SEGMENT. if the segment name does not begin with an underscore.
369
370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
371 terminated if the name length is exactly 16 bytes - but must be if the name
372 length is less than 16 characters). */
373
374 void
375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
376 const char *secname, const char **name,
377 flagword *flags)
378 {
379 const mach_o_section_name_xlat *xlat;
380 char *res;
381 unsigned int len;
382 const char *pfx = "";
383
384 *name = NULL;
385 *flags = SEC_NO_FLAGS;
386
387 /* First search for a canonical name...
388 xlat will be non-null if there is an entry for segname, secname. */
389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
390 if (xlat)
391 {
392 len = strlen (xlat->bfd_name);
393 res = bfd_alloc (abfd, len+1);
394 if (res == NULL)
395 return;
396 memcpy (res, xlat->bfd_name, len+1);
397 *name = res;
398 *flags = xlat->bfd_flags;
399 return;
400 }
401
402 /* ... else we make up a bfd name from the segment concatenated with the
403 section. */
404
405 len = 16 + 1 + 16 + 1;
406
407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
408 with an underscore. */
409 if (segname[0] != '_')
410 {
411 static const char seg_pfx[] = "LC_SEGMENT.";
412
413 pfx = seg_pfx;
414 len += sizeof (seg_pfx) - 1;
415 }
416
417 res = bfd_alloc (abfd, len);
418 if (res == NULL)
419 return;
420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
421 *name = res;
422 }
423
424 /* Convert a bfd section name to a Mach-O segment + section name.
425
426 If the name is a canonical one for which we have a Darwin match
427 return the translation table - which contains defaults for flags,
428 type, attribute and default alignment data.
429
430 Otherwise, expand the bfd_name (assumed to be in the form
431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
432
433 static const mach_o_section_name_xlat *
434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
435 asection *sect,
436 bfd_mach_o_section *section)
437 {
438 const mach_o_section_name_xlat *xlat;
439 const char *name = bfd_get_section_name (abfd, sect);
440 const char *segname;
441 const char *dot;
442 unsigned int len;
443 unsigned int seglen;
444 unsigned int seclen;
445
446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
448
449 /* See if is a canonical name ... */
450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
451 if (xlat)
452 {
453 strcpy (section->segname, segname);
454 strcpy (section->sectname, xlat->mach_o_name);
455 return xlat;
456 }
457
458 /* .. else we convert our constructed one back to Mach-O.
459 Strip LC_SEGMENT. prefix, if present. */
460 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
461 name += 11;
462
463 /* Find a dot. */
464 dot = strchr (name, '.');
465 len = strlen (name);
466
467 /* Try to split name into segment and section names. */
468 if (dot && dot != name)
469 {
470 seglen = dot - name;
471 seclen = len - (dot + 1 - name);
472
473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
474 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
475 {
476 memcpy (section->segname, name, seglen);
477 section->segname[seglen] = 0;
478 memcpy (section->sectname, dot + 1, seclen);
479 section->sectname[seclen] = 0;
480 return NULL;
481 }
482 }
483
484 /* The segment and section names are both missing - don't make them
485 into dots. */
486 if (dot && dot == name)
487 return NULL;
488
489 /* Just duplicate the name into both segment and section. */
490 if (len > 16)
491 len = 16;
492 memcpy (section->segname, name, len);
493 section->segname[len] = 0;
494 memcpy (section->sectname, name, len);
495 section->sectname[len] = 0;
496 return NULL;
497 }
498
499 /* Return the size of an entry for section SEC.
500 Must be called only for symbol pointer section and symbol stubs
501 sections. */
502
503 unsigned int
504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
505 {
506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
507 {
508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
510 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
511 case BFD_MACH_O_S_SYMBOL_STUBS:
512 return sec->reserved2;
513 default:
514 BFD_FAIL ();
515 return 0;
516 }
517 }
518
519 /* Return the number of indirect symbols for a section.
520 Must be called only for symbol pointer section and symbol stubs
521 sections. */
522
523 unsigned int
524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
525 {
526 unsigned int elsz;
527
528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
529 if (elsz == 0)
530 return 0;
531 else
532 return sec->size / elsz;
533 }
534
535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
536
537 static void
538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
539 {
540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
541
542 if (mdata->last_command != NULL)
543 mdata->last_command->next = cmd;
544 else
545 mdata->first_command = cmd;
546 mdata->last_command = cmd;
547 cmd->next = NULL;
548 }
549
550 /* Copy any private info we understand from the input symbol
551 to the output symbol. */
552
553 bfd_boolean
554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asymbol *isymbol,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asymbol *osymbol)
558 {
559 bfd_mach_o_asymbol *os, *is;
560
561 os = (bfd_mach_o_asymbol *)osymbol;
562 is = (bfd_mach_o_asymbol *)isymbol;
563 os->n_type = is->n_type;
564 os->n_sect = is->n_sect;
565 os->n_desc = is->n_desc;
566 os->symbol.udata.i = is->symbol.udata.i;
567
568 return TRUE;
569 }
570
571 /* Copy any private info we understand from the input section
572 to the output section. */
573
574 bfd_boolean
575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
576 bfd *obfd, asection *osection)
577 {
578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
580
581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
582 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
583 return TRUE;
584
585 BFD_ASSERT (is != NULL && os != NULL);
586
587 os->flags = is->flags;
588 os->reserved1 = is->reserved1;
589 os->reserved2 = is->reserved2;
590 os->reserved3 = is->reserved3;
591
592 return TRUE;
593 }
594
595 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 }
694 break;
695
696 default:
697 /* That command should be handled. */
698 abort ();
699 }
700
701 /* Insert command. */
702 bfd_mach_o_append_command (obfd, ocmd);
703 }
704
705 return TRUE;
706 }
707
708 /* This allows us to set up to 32 bits of flags (unless we invent some
709 fiendish scheme to subdivide). For now, we'll just set the file flags
710 without error checking - just overwrite. */
711
712 bfd_boolean
713 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
714 {
715 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
716
717 if (!mdata)
718 return FALSE;
719
720 mdata->header.flags = flags;
721 return TRUE;
722 }
723
724 /* Count the total number of symbols. */
725
726 static long
727 bfd_mach_o_count_symbols (bfd *abfd)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (mdata->symtab == NULL)
732 return 0;
733 return mdata->symtab->nsyms;
734 }
735
736 long
737 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
738 {
739 long nsyms = bfd_mach_o_count_symbols (abfd);
740
741 return ((nsyms + 1) * sizeof (asymbol *));
742 }
743
744 long
745 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
746 {
747 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
748 long nsyms = bfd_mach_o_count_symbols (abfd);
749 bfd_mach_o_symtab_command *sym = mdata->symtab;
750 unsigned long j;
751
752 if (nsyms < 0)
753 return nsyms;
754
755 if (nsyms == 0)
756 {
757 /* Do not try to read symbols if there are none. */
758 alocation[0] = NULL;
759 return 0;
760 }
761
762 if (!bfd_mach_o_read_symtab_symbols (abfd))
763 {
764 (*_bfd_error_handler)
765 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
766 return 0;
767 }
768
769 BFD_ASSERT (sym->symbols != NULL);
770
771 for (j = 0; j < sym->nsyms; j++)
772 alocation[j] = &sym->symbols[j].symbol;
773
774 alocation[j] = NULL;
775
776 return nsyms;
777 }
778
779 /* Create synthetic symbols for indirect symbols. */
780
781 long
782 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
783 long symcount ATTRIBUTE_UNUSED,
784 asymbol **syms ATTRIBUTE_UNUSED,
785 long dynsymcount ATTRIBUTE_UNUSED,
786 asymbol **dynsyms ATTRIBUTE_UNUSED,
787 asymbol **ret)
788 {
789 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
790 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
791 bfd_mach_o_symtab_command *symtab = mdata->symtab;
792 asymbol *s;
793 unsigned long count, i, j, n;
794 size_t size;
795 char *names;
796 char *nul_name;
797
798 *ret = NULL;
799
800 /* Stop now if no symbols or no indirect symbols. */
801 if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
802 return 0;
803
804 if (dysymtab->nindirectsyms == 0)
805 return 0;
806
807 /* We need to allocate a bfd symbol for every indirect symbol and to
808 allocate the memory for its name. */
809 count = dysymtab->nindirectsyms;
810 size = count * sizeof (asymbol) + 1;
811
812 for (j = 0; j < count; j++)
813 {
814 unsigned int isym = dysymtab->indirect_syms[j];
815
816 /* Some indirect symbols are anonymous. */
817 if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
818 size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
819 }
820
821 s = *ret = (asymbol *) bfd_malloc (size);
822 if (s == NULL)
823 return -1;
824 names = (char *) (s + count);
825 nul_name = names;
826 *names++ = 0;
827
828 n = 0;
829 for (i = 0; i < mdata->nsects; i++)
830 {
831 bfd_mach_o_section *sec = mdata->sections[i];
832 unsigned int first, last;
833 bfd_vma addr;
834 bfd_vma entry_size;
835
836 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
837 {
838 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
839 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
840 case BFD_MACH_O_S_SYMBOL_STUBS:
841 /* Only these sections have indirect symbols. */
842 first = sec->reserved1;
843 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
844 addr = sec->addr;
845 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
846 for (j = first; j < last; j++)
847 {
848 unsigned int isym = dysymtab->indirect_syms[j];
849
850 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
851 s->section = sec->bfdsection;
852 s->value = addr - sec->addr;
853 s->udata.p = NULL;
854
855 if (isym < symtab->nsyms
856 && symtab->symbols[isym].symbol.name)
857 {
858 const char *sym = symtab->symbols[isym].symbol.name;
859 size_t len;
860
861 s->name = names;
862 len = strlen (sym);
863 memcpy (names, sym, len);
864 names += len;
865 memcpy (names, "$stub", sizeof ("$stub"));
866 names += sizeof ("$stub");
867 }
868 else
869 s->name = nul_name;
870
871 addr += entry_size;
872 s++;
873 n++;
874 }
875 break;
876 default:
877 break;
878 }
879 }
880
881 return n;
882 }
883
884 void
885 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
886 asymbol *symbol,
887 symbol_info *ret)
888 {
889 bfd_symbol_info (symbol, ret);
890 }
891
892 void
893 bfd_mach_o_print_symbol (bfd *abfd,
894 void * afile,
895 asymbol *symbol,
896 bfd_print_symbol_type how)
897 {
898 FILE *file = (FILE *) afile;
899 const char *name;
900 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
901
902 switch (how)
903 {
904 case bfd_print_symbol_name:
905 fprintf (file, "%s", symbol->name);
906 break;
907 default:
908 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
909 if (asym->n_type & BFD_MACH_O_N_STAB)
910 name = bfd_get_stab_name (asym->n_type);
911 else
912 switch (asym->n_type & BFD_MACH_O_N_TYPE)
913 {
914 case BFD_MACH_O_N_UNDF:
915 if (symbol->value == 0)
916 name = "UND";
917 else
918 name = "COM";
919 break;
920 case BFD_MACH_O_N_ABS:
921 name = "ABS";
922 break;
923 case BFD_MACH_O_N_INDR:
924 name = "INDR";
925 break;
926 case BFD_MACH_O_N_PBUD:
927 name = "PBUD";
928 break;
929 case BFD_MACH_O_N_SECT:
930 name = "SECT";
931 break;
932 default:
933 name = "???";
934 break;
935 }
936 if (name == NULL)
937 name = "";
938 fprintf (file, " %02x %-6s %02x %04x",
939 asym->n_type, name, asym->n_sect, asym->n_desc);
940 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
941 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
942 fprintf (file, " [%s]", symbol->section->name);
943 fprintf (file, " %s", symbol->name);
944 }
945 }
946
947 static void
948 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
949 bfd_mach_o_cpu_subtype msubtype,
950 enum bfd_architecture *type,
951 unsigned long *subtype)
952 {
953 *subtype = bfd_arch_unknown;
954
955 switch (mtype)
956 {
957 case BFD_MACH_O_CPU_TYPE_VAX:
958 *type = bfd_arch_vax;
959 break;
960 case BFD_MACH_O_CPU_TYPE_MC680x0:
961 *type = bfd_arch_m68k;
962 break;
963 case BFD_MACH_O_CPU_TYPE_I386:
964 *type = bfd_arch_i386;
965 *subtype = bfd_mach_i386_i386;
966 break;
967 case BFD_MACH_O_CPU_TYPE_X86_64:
968 *type = bfd_arch_i386;
969 *subtype = bfd_mach_x86_64;
970 break;
971 case BFD_MACH_O_CPU_TYPE_MIPS:
972 *type = bfd_arch_mips;
973 break;
974 case BFD_MACH_O_CPU_TYPE_MC98000:
975 *type = bfd_arch_m98k;
976 break;
977 case BFD_MACH_O_CPU_TYPE_HPPA:
978 *type = bfd_arch_hppa;
979 break;
980 case BFD_MACH_O_CPU_TYPE_ARM:
981 *type = bfd_arch_arm;
982 switch (msubtype)
983 {
984 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
985 *subtype = bfd_mach_arm_4T;
986 break;
987 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
988 *subtype = bfd_mach_arm_4T; /* Best fit ? */
989 break;
990 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
991 *subtype = bfd_mach_arm_5TE;
992 break;
993 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
994 *subtype = bfd_mach_arm_XScale;
995 break;
996 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
997 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
998 break;
999 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1000 default:
1001 break;
1002 }
1003 break;
1004 case BFD_MACH_O_CPU_TYPE_MC88000:
1005 *type = bfd_arch_m88k;
1006 break;
1007 case BFD_MACH_O_CPU_TYPE_SPARC:
1008 *type = bfd_arch_sparc;
1009 *subtype = bfd_mach_sparc;
1010 break;
1011 case BFD_MACH_O_CPU_TYPE_I860:
1012 *type = bfd_arch_i860;
1013 break;
1014 case BFD_MACH_O_CPU_TYPE_ALPHA:
1015 *type = bfd_arch_alpha;
1016 break;
1017 case BFD_MACH_O_CPU_TYPE_POWERPC:
1018 *type = bfd_arch_powerpc;
1019 *subtype = bfd_mach_ppc;
1020 break;
1021 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1022 *type = bfd_arch_powerpc;
1023 *subtype = bfd_mach_ppc64;
1024 break;
1025 case BFD_MACH_O_CPU_TYPE_ARM64:
1026 *type = bfd_arch_aarch64;
1027 *subtype = bfd_mach_aarch64;
1028 break;
1029 default:
1030 *type = bfd_arch_unknown;
1031 break;
1032 }
1033 }
1034
1035 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1036 number of bytes written or -1 in case of error. */
1037
1038 static int
1039 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1040 {
1041 if (len % 4 != 0)
1042 {
1043 char pad[4] = {0,0,0,0};
1044 unsigned int padlen = 4 - (len % 4);
1045
1046 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1047 return -1;
1048
1049 return padlen;
1050 }
1051 else
1052 return 0;
1053 }
1054
1055 /* Likewise, but for a command. */
1056
1057 static int
1058 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1059 {
1060 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1061
1062 if (len % align != 0)
1063 {
1064 char pad[8] = {0};
1065 unsigned int padlen = align - (len % align);
1066
1067 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1068 return -1;
1069
1070 return padlen;
1071 }
1072 else
1073 return 0;
1074 }
1075
1076 static bfd_boolean
1077 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1078 {
1079 struct mach_o_header_external raw;
1080 unsigned int size;
1081
1082 size = mach_o_wide_p (header) ?
1083 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1084
1085 bfd_h_put_32 (abfd, header->magic, raw.magic);
1086 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1087 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1088 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1089 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1090 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1091 bfd_h_put_32 (abfd, header->flags, raw.flags);
1092
1093 if (mach_o_wide_p (header))
1094 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1095
1096 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1097 || bfd_bwrite (&raw, size, abfd) != size)
1098 return FALSE;
1099
1100 return TRUE;
1101 }
1102
1103 static bfd_boolean
1104 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1105 {
1106 bfd_mach_o_thread_command *cmd = &command->command.thread;
1107 unsigned int i;
1108 struct mach_o_thread_command_external raw;
1109 unsigned int offset;
1110
1111 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1112 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1113
1114 offset = BFD_MACH_O_LC_SIZE;
1115 for (i = 0; i < cmd->nflavours; i++)
1116 {
1117 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1118 BFD_ASSERT (cmd->flavours[i].offset ==
1119 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1120
1121 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1122 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1123
1124 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1125 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1126 return FALSE;
1127
1128 offset += cmd->flavours[i].size + sizeof (raw);
1129 }
1130
1131 return TRUE;
1132 }
1133
1134 static bfd_boolean
1135 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1136 {
1137 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1138 struct mach_o_str_command_external raw;
1139 unsigned int namelen;
1140
1141 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1142
1143 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1144 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1145 return FALSE;
1146
1147 namelen = strlen (cmd->name_str) + 1;
1148 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1149 return FALSE;
1150
1151 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1152 return FALSE;
1153
1154 return TRUE;
1155 }
1156
1157 static bfd_boolean
1158 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1159 {
1160 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1161 struct mach_o_dylib_command_external raw;
1162 unsigned int namelen;
1163
1164 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1165 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1166 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1167 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1168
1169 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1170 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1171 return FALSE;
1172
1173 namelen = strlen (cmd->name_str) + 1;
1174 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1175 return FALSE;
1176
1177 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1178 return FALSE;
1179
1180 return TRUE;
1181 }
1182
1183 static bfd_boolean
1184 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1185 {
1186 bfd_mach_o_main_command *cmd = &command->command.main;
1187 struct mach_o_entry_point_command_external raw;
1188
1189 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1190 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1191
1192 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1193 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1194 return FALSE;
1195
1196 return TRUE;
1197 }
1198
1199 static bfd_boolean
1200 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1201 {
1202 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1203 struct mach_o_dyld_info_command_external raw;
1204
1205 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1206 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1207 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1208 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1209 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1210 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1211 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1212 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1213 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1214 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1215
1216 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1217 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1218 return FALSE;
1219
1220 if (cmd->rebase_size != 0)
1221 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1222 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1223 cmd->rebase_size))
1224 return FALSE;
1225
1226 if (cmd->bind_size != 0)
1227 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1228 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1229 cmd->bind_size))
1230 return FALSE;
1231
1232 if (cmd->weak_bind_size != 0)
1233 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1234 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1235 cmd->weak_bind_size))
1236 return FALSE;
1237
1238 if (cmd->lazy_bind_size != 0)
1239 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1240 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1241 cmd->lazy_bind_size))
1242 return FALSE;
1243
1244 if (cmd->export_size != 0)
1245 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1246 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1247 cmd->export_size))
1248 return FALSE;
1249
1250 return TRUE;
1251 }
1252
1253 long
1254 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1255 asection *asect)
1256 {
1257 return (asect->reloc_count + 1) * sizeof (arelent *);
1258 }
1259
1260 /* In addition to the need to byte-swap the symbol number, the bit positions
1261 of the fields in the relocation information vary per target endian-ness. */
1262
1263 static void
1264 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1265 unsigned char *fields)
1266 {
1267 unsigned char info = fields[3];
1268
1269 if (bfd_big_endian (abfd))
1270 {
1271 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1272 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1273 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1274 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1275 & BFD_MACH_O_LENGTH_MASK;
1276 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1277 }
1278 else
1279 {
1280 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1281 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1282 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1283 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1284 & BFD_MACH_O_LENGTH_MASK;
1285 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1286 }
1287 }
1288
1289 static int
1290 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1291 struct mach_o_reloc_info_external *raw,
1292 arelent *res, asymbol **syms)
1293 {
1294 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1295 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1296 bfd_mach_o_reloc_info reloc;
1297 bfd_vma addr;
1298 asymbol **sym;
1299
1300 addr = bfd_get_32 (abfd, raw->r_address);
1301 res->sym_ptr_ptr = NULL;
1302 res->addend = 0;
1303
1304 if (addr & BFD_MACH_O_SR_SCATTERED)
1305 {
1306 unsigned int j;
1307 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1308
1309 /* Scattered relocation, can't be extern. */
1310 reloc.r_scattered = 1;
1311 reloc.r_extern = 0;
1312
1313 /* Extract section and offset from r_value (symnum). */
1314 reloc.r_value = symnum;
1315 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1316 end of the data for the section (e.g. in a calculation of section
1317 data length). At present, the symbol will end up associated with
1318 the following section or, if it falls within alignment padding, as
1319 null - which will assert later. */
1320 for (j = 0; j < mdata->nsects; j++)
1321 {
1322 bfd_mach_o_section *sect = mdata->sections[j];
1323 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1324 {
1325 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1326 res->addend = symnum - sect->addr;
1327 break;
1328 }
1329 }
1330
1331 /* Extract the info and address fields from r_address. */
1332 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1333 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1334 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1335 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1336 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1337 }
1338 else
1339 {
1340 unsigned int num;
1341
1342 /* Non-scattered relocation. */
1343 reloc.r_scattered = 0;
1344
1345 /* The value and info fields have to be extracted dependent on target
1346 endian-ness. */
1347 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1348 num = reloc.r_value;
1349
1350 if (reloc.r_extern)
1351 {
1352 /* An external symbol number. */
1353 sym = syms + num;
1354 }
1355 else if (num == 0x00ffffff || num == 0)
1356 {
1357 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1358 is generic code, we don't know wether this is really a PAIR.
1359 This value is almost certainly not a valid section number, hence
1360 this specific case to avoid an assertion failure.
1361 Target specific swap_reloc_in routine should adjust that. */
1362 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1363 }
1364 else
1365 {
1366 /* PR 17512: file: 006-2964-0.004. */
1367 if (num >= mdata->nsects)
1368 return -1;
1369
1370 /* A section number. */
1371 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1372 /* For a symbol defined in section S, the addend (stored in the
1373 binary) contains the address of the section. To comply with
1374 bfd convention, subtract the section address.
1375 Use the address from the header, so that the user can modify
1376 the vma of the section. */
1377 res->addend = -mdata->sections[num - 1]->addr;
1378 }
1379 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1380 in the lower 16bits of the address value. So we have to find the
1381 'symbol' from the preceding reloc. We do this even though the
1382 section symbol is probably not needed here, because NULL symbol
1383 values cause an assert in generic BFD code. This must be done in
1384 the PPC swap_reloc_in routine. */
1385 res->sym_ptr_ptr = sym;
1386
1387 /* The 'address' is just r_address.
1388 ??? maybe this should be masked with 0xffffff for safety. */
1389 res->address = addr;
1390 reloc.r_address = addr;
1391 }
1392
1393 /* We have set up a reloc with all the information present, so the swapper
1394 can modify address, value and addend fields, if necessary, to convey
1395 information in the generic BFD reloc that is mach-o specific. */
1396
1397 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1398 return -1;
1399 return 0;
1400 }
1401
1402 static int
1403 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1404 unsigned long count,
1405 arelent *res, asymbol **syms)
1406 {
1407 unsigned long i;
1408 struct mach_o_reloc_info_external *native_relocs;
1409 bfd_size_type native_size;
1410
1411 /* Allocate and read relocs. */
1412 native_size = count * BFD_MACH_O_RELENT_SIZE;
1413 native_relocs =
1414 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1415 if (native_relocs == NULL)
1416 return -1;
1417
1418 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1419 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1420 goto err;
1421
1422 for (i = 0; i < count; i++)
1423 {
1424 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1425 &res[i], syms) < 0)
1426 goto err;
1427 }
1428 free (native_relocs);
1429 return i;
1430 err:
1431 free (native_relocs);
1432 return -1;
1433 }
1434
1435 long
1436 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1437 arelent **rels, asymbol **syms)
1438 {
1439 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1440 unsigned long i;
1441 arelent *res;
1442
1443 if (asect->reloc_count == 0)
1444 return 0;
1445
1446 /* No need to go further if we don't know how to read relocs. */
1447 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1448 return 0;
1449
1450 if (asect->relocation == NULL)
1451 {
1452 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1453 if (res == NULL)
1454 return -1;
1455
1456 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1457 asect->reloc_count, res, syms) < 0)
1458 {
1459 free (res);
1460 return -1;
1461 }
1462 asect->relocation = res;
1463 }
1464
1465 res = asect->relocation;
1466 for (i = 0; i < asect->reloc_count; i++)
1467 rels[i] = &res[i];
1468 rels[i] = NULL;
1469
1470 return i;
1471 }
1472
1473 long
1474 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1475 {
1476 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1477
1478 if (mdata->dysymtab == NULL)
1479 return 1;
1480 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1481 * sizeof (arelent *);
1482 }
1483
1484 long
1485 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1486 struct bfd_symbol **syms)
1487 {
1488 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1489 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1490 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1491 unsigned long i;
1492 arelent *res;
1493
1494 if (dysymtab == NULL)
1495 return 0;
1496 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1497 return 0;
1498
1499 /* No need to go further if we don't know how to read relocs. */
1500 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1501 return 0;
1502
1503 if (mdata->dyn_reloc_cache == NULL)
1504 {
1505 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1506 * sizeof (arelent));
1507 if (res == NULL)
1508 return -1;
1509
1510 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1511 dysymtab->nextrel, res, syms) < 0)
1512 {
1513 free (res);
1514 return -1;
1515 }
1516
1517 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1518 dysymtab->nlocrel,
1519 res + dysymtab->nextrel, syms) < 0)
1520 {
1521 free (res);
1522 return -1;
1523 }
1524
1525 mdata->dyn_reloc_cache = res;
1526 }
1527
1528 res = mdata->dyn_reloc_cache;
1529 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1530 rels[i] = &res[i];
1531 rels[i] = NULL;
1532 return i;
1533 }
1534
1535 /* In addition to the need to byte-swap the symbol number, the bit positions
1536 of the fields in the relocation information vary per target endian-ness. */
1537
1538 static void
1539 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1540 bfd_mach_o_reloc_info *rel)
1541 {
1542 unsigned char info = 0;
1543
1544 BFD_ASSERT (rel->r_type <= 15);
1545 BFD_ASSERT (rel->r_length <= 3);
1546
1547 if (bfd_big_endian (abfd))
1548 {
1549 fields[0] = (rel->r_value >> 16) & 0xff;
1550 fields[1] = (rel->r_value >> 8) & 0xff;
1551 fields[2] = rel->r_value & 0xff;
1552 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1553 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1554 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1555 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1556 }
1557 else
1558 {
1559 fields[2] = (rel->r_value >> 16) & 0xff;
1560 fields[1] = (rel->r_value >> 8) & 0xff;
1561 fields[0] = rel->r_value & 0xff;
1562 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1563 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1564 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1565 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1566 }
1567 fields[3] = info;
1568 }
1569
1570 static bfd_boolean
1571 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1572 {
1573 unsigned int i;
1574 arelent **entries;
1575 asection *sec;
1576 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1577
1578 sec = section->bfdsection;
1579 if (sec->reloc_count == 0)
1580 return TRUE;
1581
1582 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1583 return TRUE;
1584
1585 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1586 return FALSE;
1587
1588 /* Convert and write. */
1589 entries = section->bfdsection->orelocation;
1590 for (i = 0; i < section->nreloc; i++)
1591 {
1592 arelent *rel = entries[i];
1593 struct mach_o_reloc_info_external raw;
1594 bfd_mach_o_reloc_info info, *pinfo = &info;
1595
1596 /* Convert relocation to an intermediate representation. */
1597 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1598 return FALSE;
1599
1600 /* Lower the relocation info. */
1601 if (pinfo->r_scattered)
1602 {
1603 unsigned long v;
1604
1605 v = BFD_MACH_O_SR_SCATTERED
1606 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1607 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1608 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1609 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1610 /* Note: scattered relocs have field in reverse order... */
1611 bfd_put_32 (abfd, v, raw.r_address);
1612 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1613 }
1614 else
1615 {
1616 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1617 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1618 pinfo);
1619 }
1620
1621 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1622 != BFD_MACH_O_RELENT_SIZE)
1623 return FALSE;
1624 }
1625 return TRUE;
1626 }
1627
1628 static bfd_boolean
1629 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1630 {
1631 struct mach_o_section_32_external raw;
1632
1633 memcpy (raw.sectname, section->sectname, 16);
1634 memcpy (raw.segname, section->segname, 16);
1635 bfd_h_put_32 (abfd, section->addr, raw.addr);
1636 bfd_h_put_32 (abfd, section->size, raw.size);
1637 bfd_h_put_32 (abfd, section->offset, raw.offset);
1638 bfd_h_put_32 (abfd, section->align, raw.align);
1639 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1640 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1641 bfd_h_put_32 (abfd, section->flags, raw.flags);
1642 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1643 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1644
1645 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1646 != BFD_MACH_O_SECTION_SIZE)
1647 return FALSE;
1648
1649 return TRUE;
1650 }
1651
1652 static bfd_boolean
1653 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1654 {
1655 struct mach_o_section_64_external raw;
1656
1657 memcpy (raw.sectname, section->sectname, 16);
1658 memcpy (raw.segname, section->segname, 16);
1659 bfd_h_put_64 (abfd, section->addr, raw.addr);
1660 bfd_h_put_64 (abfd, section->size, raw.size);
1661 bfd_h_put_32 (abfd, section->offset, raw.offset);
1662 bfd_h_put_32 (abfd, section->align, raw.align);
1663 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1664 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1665 bfd_h_put_32 (abfd, section->flags, raw.flags);
1666 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1667 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1668 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1669
1670 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1671 != BFD_MACH_O_SECTION_64_SIZE)
1672 return FALSE;
1673
1674 return TRUE;
1675 }
1676
1677 static bfd_boolean
1678 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1679 {
1680 struct mach_o_segment_command_32_external raw;
1681 bfd_mach_o_segment_command *seg = &command->command.segment;
1682 bfd_mach_o_section *sec;
1683
1684 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1685
1686 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1687 if (!bfd_mach_o_write_relocs (abfd, sec))
1688 return FALSE;
1689
1690 memcpy (raw.segname, seg->segname, 16);
1691 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1692 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1693 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1694 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1695 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1696 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1697 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1698 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1699
1700 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1701 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1702 return FALSE;
1703
1704 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1705 if (!bfd_mach_o_write_section_32 (abfd, sec))
1706 return FALSE;
1707
1708 return TRUE;
1709 }
1710
1711 static bfd_boolean
1712 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1713 {
1714 struct mach_o_segment_command_64_external raw;
1715 bfd_mach_o_segment_command *seg = &command->command.segment;
1716 bfd_mach_o_section *sec;
1717
1718 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1719
1720 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1721 if (!bfd_mach_o_write_relocs (abfd, sec))
1722 return FALSE;
1723
1724 memcpy (raw.segname, seg->segname, 16);
1725 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1726 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1727 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1728 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1729 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1730 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1731 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1732 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1733
1734 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1735 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1736 return FALSE;
1737
1738 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1739 if (!bfd_mach_o_write_section_64 (abfd, sec))
1740 return FALSE;
1741
1742 return TRUE;
1743 }
1744
1745 static bfd_boolean
1746 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1747 {
1748 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1749 unsigned long i;
1750 unsigned int wide = bfd_mach_o_wide_p (abfd);
1751 struct bfd_strtab_hash *strtab;
1752 asymbol **symbols = bfd_get_outsymbols (abfd);
1753 int padlen;
1754
1755 /* Write the symbols first. */
1756 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1757 return FALSE;
1758
1759 strtab = _bfd_stringtab_init ();
1760 if (strtab == NULL)
1761 return FALSE;
1762
1763 if (sym->nsyms > 0)
1764 /* Although we don't strictly need to do this, for compatibility with
1765 Darwin system tools, actually output an empty string for the index
1766 0 entry. */
1767 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1768
1769 for (i = 0; i < sym->nsyms; i++)
1770 {
1771 bfd_size_type str_index;
1772 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1773
1774 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1775 /* An index of 0 always means the empty string. */
1776 str_index = 0;
1777 else
1778 {
1779 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1780
1781 if (str_index == (bfd_size_type) -1)
1782 goto err;
1783 }
1784
1785 if (wide)
1786 {
1787 struct mach_o_nlist_64_external raw;
1788
1789 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1790 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1791 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1792 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1793 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1794 raw.n_value);
1795
1796 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1797 goto err;
1798 }
1799 else
1800 {
1801 struct mach_o_nlist_external raw;
1802
1803 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1804 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1805 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1806 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1807 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1808 raw.n_value);
1809
1810 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1811 goto err;
1812 }
1813 }
1814 sym->strsize = _bfd_stringtab_size (strtab);
1815 sym->stroff = mdata->filelen;
1816 mdata->filelen += sym->strsize;
1817
1818 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1819 return FALSE;
1820
1821 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1822 goto err;
1823 _bfd_stringtab_free (strtab);
1824
1825 /* Pad string table. */
1826 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1827 if (padlen < 0)
1828 return FALSE;
1829 mdata->filelen += padlen;
1830 sym->strsize += padlen;
1831
1832 return TRUE;
1833
1834 err:
1835 _bfd_stringtab_free (strtab);
1836 return FALSE;
1837 }
1838
1839 static bfd_boolean
1840 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1841 {
1842 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1843 struct mach_o_symtab_command_external raw;
1844
1845 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1846
1847 /* The command. */
1848 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1849 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1850 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1851 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1852
1853 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1854 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1855 return FALSE;
1856
1857 return TRUE;
1858 }
1859
1860 /* Count the number of indirect symbols in the image.
1861 Requires that the sections are in their final order. */
1862
1863 static unsigned int
1864 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1865 {
1866 unsigned int i;
1867 unsigned int nisyms = 0;
1868
1869 for (i = 0; i < mdata->nsects; ++i)
1870 {
1871 bfd_mach_o_section *sec = mdata->sections[i];
1872
1873 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1874 {
1875 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1876 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1877 case BFD_MACH_O_S_SYMBOL_STUBS:
1878 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1879 break;
1880 default:
1881 break;
1882 }
1883 }
1884 return nisyms;
1885 }
1886
1887 /* Create the dysymtab. */
1888
1889 static bfd_boolean
1890 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1891 {
1892 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1893
1894 /* TODO:
1895 We are not going to try and fill these in yet and, moreover, we are
1896 going to bail if they are already set. */
1897 if (cmd->nmodtab != 0
1898 || cmd->ntoc != 0
1899 || cmd->nextrefsyms != 0)
1900 {
1901 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
1902 " implemented for dysymtab commands."));
1903 return FALSE;
1904 }
1905
1906 cmd->ilocalsym = 0;
1907
1908 if (bfd_get_symcount (abfd) > 0)
1909 {
1910 asymbol **symbols = bfd_get_outsymbols (abfd);
1911 unsigned long i;
1912
1913 /* Count the number of each kind of symbol. */
1914 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1915 {
1916 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1917 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1918 break;
1919 }
1920 cmd->nlocalsym = i;
1921 cmd->iextdefsym = i;
1922 for (; i < bfd_get_symcount (abfd); ++i)
1923 {
1924 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1925 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
1926 break;
1927 }
1928 cmd->nextdefsym = i - cmd->nlocalsym;
1929 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
1930 cmd->nundefsym = bfd_get_symcount (abfd)
1931 - cmd->nlocalsym
1932 - cmd->nextdefsym;
1933 }
1934 else
1935 {
1936 cmd->nlocalsym = 0;
1937 cmd->iextdefsym = 0;
1938 cmd->nextdefsym = 0;
1939 cmd->iundefsym = 0;
1940 cmd->nundefsym = 0;
1941 }
1942
1943 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
1944 if (cmd->nindirectsyms > 0)
1945 {
1946 unsigned i;
1947 unsigned n;
1948
1949 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
1950 cmd->indirectsymoff = mdata->filelen;
1951 mdata->filelen += cmd->nindirectsyms * 4;
1952
1953 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
1954 if (cmd->indirect_syms == NULL)
1955 return FALSE;
1956
1957 n = 0;
1958 for (i = 0; i < mdata->nsects; ++i)
1959 {
1960 bfd_mach_o_section *sec = mdata->sections[i];
1961
1962 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1963 {
1964 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1965 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1966 case BFD_MACH_O_S_SYMBOL_STUBS:
1967 {
1968 unsigned j, num;
1969 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
1970
1971 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1972 if (isyms == NULL || num == 0)
1973 break;
1974 /* Record the starting index in the reserved1 field. */
1975 sec->reserved1 = n;
1976 for (j = 0; j < num; j++, n++)
1977 {
1978 if (isyms[j] == NULL)
1979 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
1980 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
1981 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
1982 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
1983 | BFD_MACH_O_INDIRECT_SYM_ABS;
1984 else
1985 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
1986 }
1987 }
1988 break;
1989 default:
1990 break;
1991 }
1992 }
1993 }
1994
1995 return TRUE;
1996 }
1997
1998 /* Write a dysymtab command.
1999 TODO: Possibly coalesce writes of smaller objects. */
2000
2001 static bfd_boolean
2002 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2003 {
2004 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2005
2006 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2007
2008 if (cmd->nmodtab != 0)
2009 {
2010 unsigned int i;
2011
2012 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2013 return FALSE;
2014
2015 for (i = 0; i < cmd->nmodtab; i++)
2016 {
2017 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2018 unsigned int iinit;
2019 unsigned int ninit;
2020
2021 iinit = module->iinit & 0xffff;
2022 iinit |= ((module->iterm & 0xffff) << 16);
2023
2024 ninit = module->ninit & 0xffff;
2025 ninit |= ((module->nterm & 0xffff) << 16);
2026
2027 if (bfd_mach_o_wide_p (abfd))
2028 {
2029 struct mach_o_dylib_module_64_external w;
2030
2031 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2032 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2033 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2034 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2035 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2036 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2037 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2038 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2039 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2040 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2041 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2042 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2043 &w.objc_module_info_addr);
2044 bfd_h_put_32 (abfd, module->objc_module_info_size,
2045 &w.objc_module_info_size);
2046
2047 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2048 return FALSE;
2049 }
2050 else
2051 {
2052 struct mach_o_dylib_module_external n;
2053
2054 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2055 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2056 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2057 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2058 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2059 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2060 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2061 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2062 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2063 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2064 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2065 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2066 &n.objc_module_info_addr);
2067 bfd_h_put_32 (abfd, module->objc_module_info_size,
2068 &n.objc_module_info_size);
2069
2070 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2071 return FALSE;
2072 }
2073 }
2074 }
2075
2076 if (cmd->ntoc != 0)
2077 {
2078 unsigned int i;
2079
2080 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2081 return FALSE;
2082
2083 for (i = 0; i < cmd->ntoc; i++)
2084 {
2085 struct mach_o_dylib_table_of_contents_external raw;
2086 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2087
2088 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2089 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2090
2091 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2092 return FALSE;
2093 }
2094 }
2095
2096 if (cmd->nindirectsyms > 0)
2097 {
2098 unsigned int i;
2099
2100 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2101 return FALSE;
2102
2103 for (i = 0; i < cmd->nindirectsyms; ++i)
2104 {
2105 unsigned char raw[4];
2106
2107 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2108 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2109 return FALSE;
2110 }
2111 }
2112
2113 if (cmd->nextrefsyms != 0)
2114 {
2115 unsigned int i;
2116
2117 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2118 return FALSE;
2119
2120 for (i = 0; i < cmd->nextrefsyms; i++)
2121 {
2122 unsigned long v;
2123 unsigned char raw[4];
2124 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2125
2126 /* Fields isym and flags are written as bit-fields, thus we need
2127 a specific processing for endianness. */
2128
2129 if (bfd_big_endian (abfd))
2130 {
2131 v = ((ref->isym & 0xffffff) << 8);
2132 v |= ref->flags & 0xff;
2133 }
2134 else
2135 {
2136 v = ref->isym & 0xffffff;
2137 v |= ((ref->flags & 0xff) << 24);
2138 }
2139
2140 bfd_h_put_32 (abfd, v, raw);
2141 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2142 return FALSE;
2143 }
2144 }
2145
2146 /* The command. */
2147 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2148 return FALSE;
2149 else
2150 {
2151 struct mach_o_dysymtab_command_external raw;
2152
2153 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2154 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2155 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2156 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2157 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2158 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2159 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2160 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2161 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2162 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2163 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2164 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2165 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2166 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2167 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2168 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2169 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2170 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2171
2172 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2173 return FALSE;
2174 }
2175
2176 return TRUE;
2177 }
2178
2179 static unsigned
2180 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2181 {
2182 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2183
2184 /* Just leave debug symbols where they are (pretend they are local, and
2185 then they will just be sorted on position). */
2186 if (s->n_type & BFD_MACH_O_N_STAB)
2187 return 0;
2188
2189 /* Local (we should never see an undefined local AFAICT). */
2190 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2191 return 0;
2192
2193 /* Common symbols look like undefined externs. */
2194 if (mtyp == BFD_MACH_O_N_UNDF)
2195 return 2;
2196
2197 /* A defined non-local, non-debug symbol. */
2198 return 1;
2199 }
2200
2201 static int
2202 bfd_mach_o_cf_symbols (const void *a, const void *b)
2203 {
2204 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2205 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2206 unsigned int soa, sob;
2207
2208 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2209 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2210 if (soa < sob)
2211 return -1;
2212
2213 if (soa > sob)
2214 return 1;
2215
2216 /* If it's local or stab, just preserve the input order. */
2217 if (soa == 0)
2218 {
2219 if (sa->symbol.udata.i < sb->symbol.udata.i)
2220 return -1;
2221 if (sa->symbol.udata.i > sb->symbol.udata.i)
2222 return 1;
2223
2224 /* This is probably an error. */
2225 return 0;
2226 }
2227
2228 /* The second sort key is name. */
2229 return strcmp (sa->symbol.name, sb->symbol.name);
2230 }
2231
2232 /* Process the symbols.
2233
2234 This should be OK for single-module files - but it is not likely to work
2235 for multi-module shared libraries.
2236
2237 (a) If the application has not filled in the relevant mach-o fields, make
2238 an estimate.
2239
2240 (b) Order them, like this:
2241 ( i) local.
2242 (unsorted)
2243 ( ii) external defined
2244 (by name)
2245 (iii) external undefined/common
2246 (by name)
2247 ( iv) common
2248 (by name)
2249 */
2250
2251 static bfd_boolean
2252 bfd_mach_o_mangle_symbols (bfd *abfd)
2253 {
2254 unsigned long i;
2255 asymbol **symbols = bfd_get_outsymbols (abfd);
2256
2257 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2258 return TRUE;
2259
2260 for (i = 0; i < bfd_get_symcount (abfd); i++)
2261 {
2262 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2263
2264 /* We use this value, which is out-of-range as a symbol index, to signal
2265 that the mach-o-specific data are not filled in and need to be created
2266 from the bfd values. It is much preferable for the application to do
2267 this, since more meaningful diagnostics can be made that way. */
2268
2269 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2270 {
2271 /* No symbol information has been set - therefore determine
2272 it from the bfd symbol flags/info. */
2273 if (s->symbol.section == bfd_abs_section_ptr)
2274 s->n_type = BFD_MACH_O_N_ABS;
2275 else if (s->symbol.section == bfd_und_section_ptr)
2276 {
2277 s->n_type = BFD_MACH_O_N_UNDF;
2278 if (s->symbol.flags & BSF_WEAK)
2279 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2280 /* mach-o automatically makes undefined symbols extern. */
2281 s->n_type |= BFD_MACH_O_N_EXT;
2282 s->symbol.flags |= BSF_GLOBAL;
2283 }
2284 else if (s->symbol.section == bfd_com_section_ptr)
2285 {
2286 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2287 s->symbol.flags |= BSF_GLOBAL;
2288 }
2289 else
2290 s->n_type = BFD_MACH_O_N_SECT;
2291
2292 if (s->symbol.flags & BSF_GLOBAL)
2293 s->n_type |= BFD_MACH_O_N_EXT;
2294 }
2295
2296 /* Put the section index in, where required. */
2297 if ((s->symbol.section != bfd_abs_section_ptr
2298 && s->symbol.section != bfd_und_section_ptr
2299 && s->symbol.section != bfd_com_section_ptr)
2300 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2301 && s->symbol.name == NULL))
2302 s->n_sect = s->symbol.section->output_section->target_index;
2303
2304 /* Number to preserve order for local and debug syms. */
2305 s->symbol.udata.i = i;
2306 }
2307
2308 /* Sort the symbols. */
2309 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2310 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2311
2312 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2313 {
2314 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2315 s->symbol.udata.i = i; /* renumber. */
2316 }
2317
2318 return TRUE;
2319 }
2320
2321 /* We build a flat table of sections, which can be re-ordered if necessary.
2322 Fill in the section number and other mach-o-specific data. */
2323
2324 static bfd_boolean
2325 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2326 {
2327 asection *sec;
2328 unsigned target_index;
2329 unsigned nsect;
2330
2331 nsect = bfd_count_sections (abfd);
2332
2333 /* Don't do it if it's already set - assume the application knows what it's
2334 doing. */
2335 if (mdata->nsects == nsect
2336 && (mdata->nsects == 0 || mdata->sections != NULL))
2337 return TRUE;
2338
2339 mdata->nsects = nsect;
2340 mdata->sections = bfd_alloc (abfd,
2341 mdata->nsects * sizeof (bfd_mach_o_section *));
2342 if (mdata->sections == NULL)
2343 return FALSE;
2344
2345 /* We need to check that this can be done... */
2346 if (nsect > 255)
2347 (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
2348 " maximum is 255,\n"), nsect);
2349
2350 /* Create Mach-O sections.
2351 Section type, attribute and align should have been set when the
2352 section was created - either read in or specified. */
2353 target_index = 0;
2354 for (sec = abfd->sections; sec; sec = sec->next)
2355 {
2356 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2357 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2358
2359 mdata->sections[target_index] = msect;
2360
2361 msect->addr = bfd_get_section_vma (abfd, sec);
2362 msect->size = bfd_get_section_size (sec);
2363
2364 /* Use the largest alignment set, in case it was bumped after the
2365 section was created. */
2366 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2367
2368 msect->offset = 0;
2369 sec->target_index = ++target_index;
2370 }
2371
2372 return TRUE;
2373 }
2374
2375 bfd_boolean
2376 bfd_mach_o_write_contents (bfd *abfd)
2377 {
2378 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2379 bfd_mach_o_load_command *cmd;
2380 bfd_mach_o_symtab_command *symtab = NULL;
2381 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2382 bfd_mach_o_segment_command *linkedit = NULL;
2383
2384 /* Make the commands, if not already present. */
2385 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2386 return FALSE;
2387 abfd->output_has_begun = TRUE;
2388
2389 /* Write the header. */
2390 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2391 return FALSE;
2392
2393 /* First pass: allocate the linkedit segment. */
2394 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2395 switch (cmd->type)
2396 {
2397 case BFD_MACH_O_LC_SEGMENT_64:
2398 case BFD_MACH_O_LC_SEGMENT:
2399 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2400 linkedit = &cmd->command.segment;
2401 break;
2402 case BFD_MACH_O_LC_SYMTAB:
2403 symtab = &cmd->command.symtab;
2404 break;
2405 case BFD_MACH_O_LC_DYSYMTAB:
2406 dysymtab = &cmd->command.dysymtab;
2407 break;
2408 case BFD_MACH_O_LC_DYLD_INFO:
2409 {
2410 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2411
2412 if (di->rebase_size != 0)
2413 {
2414 di->rebase_off = mdata->filelen;
2415 mdata->filelen += di->rebase_size;
2416 }
2417 if (di->bind_size != 0)
2418 {
2419 di->bind_off = mdata->filelen;
2420 mdata->filelen += di->bind_size;
2421 }
2422 if (di->weak_bind_size != 0)
2423 {
2424 di->weak_bind_off = mdata->filelen;
2425 mdata->filelen += di->weak_bind_size;
2426 }
2427 if (di->lazy_bind_size != 0)
2428 {
2429 di->lazy_bind_off = mdata->filelen;
2430 mdata->filelen += di->lazy_bind_size;
2431 }
2432 if (di->export_size != 0)
2433 {
2434 di->export_off = mdata->filelen;
2435 mdata->filelen += di->export_size;
2436 }
2437 }
2438 break;
2439 case BFD_MACH_O_LC_LOAD_DYLIB:
2440 case BFD_MACH_O_LC_LOAD_DYLINKER:
2441 case BFD_MACH_O_LC_MAIN:
2442 /* Nothing to do. */
2443 break;
2444 default:
2445 (*_bfd_error_handler)
2446 (_("unable to allocate data for load command 0x%lx"),
2447 (unsigned long) cmd->type);
2448 break;
2449 }
2450
2451 /* Specially handle symtab and dysymtab. */
2452
2453 /* Pre-allocate the symbol table (but not the string table). The reason
2454 is that the dysymtab is after the symbol table but before the string
2455 table (required by the native strip tool). */
2456 if (symtab != NULL)
2457 {
2458 unsigned int symlen;
2459 unsigned int wide = bfd_mach_o_wide_p (abfd);
2460
2461 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2462
2463 /* Align for symbols. */
2464 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2465 symtab->symoff = mdata->filelen;
2466
2467 symtab->nsyms = bfd_get_symcount (abfd);
2468 mdata->filelen += symtab->nsyms * symlen;
2469 }
2470
2471 /* Build the dysymtab. */
2472 if (dysymtab != NULL)
2473 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2474 return FALSE;
2475
2476 /* Write symtab and strtab. */
2477 if (symtab != NULL)
2478 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2479 return FALSE;
2480
2481 /* Adjust linkedit size. */
2482 if (linkedit != NULL)
2483 {
2484 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2485
2486 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2487 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2488 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2489
2490 linkedit->initprot = BFD_MACH_O_PROT_READ;
2491 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2492 | BFD_MACH_O_PROT_EXECUTE;
2493 }
2494
2495 /* Second pass: write commands. */
2496 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2497 {
2498 struct mach_o_load_command_external raw;
2499 unsigned long typeflag;
2500
2501 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2502
2503 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2504 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2505
2506 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2507 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2508 return FALSE;
2509
2510 switch (cmd->type)
2511 {
2512 case BFD_MACH_O_LC_SEGMENT:
2513 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2514 return FALSE;
2515 break;
2516 case BFD_MACH_O_LC_SEGMENT_64:
2517 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2518 return FALSE;
2519 break;
2520 case BFD_MACH_O_LC_SYMTAB:
2521 if (!bfd_mach_o_write_symtab (abfd, cmd))
2522 return FALSE;
2523 break;
2524 case BFD_MACH_O_LC_DYSYMTAB:
2525 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2526 return FALSE;
2527 break;
2528 case BFD_MACH_O_LC_THREAD:
2529 case BFD_MACH_O_LC_UNIXTHREAD:
2530 if (!bfd_mach_o_write_thread (abfd, cmd))
2531 return FALSE;
2532 break;
2533 case BFD_MACH_O_LC_LOAD_DYLIB:
2534 if (!bfd_mach_o_write_dylib (abfd, cmd))
2535 return FALSE;
2536 break;
2537 case BFD_MACH_O_LC_LOAD_DYLINKER:
2538 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2539 return FALSE;
2540 break;
2541 case BFD_MACH_O_LC_MAIN:
2542 if (!bfd_mach_o_write_main (abfd, cmd))
2543 return FALSE;
2544 break;
2545 case BFD_MACH_O_LC_DYLD_INFO:
2546 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2547 return FALSE;
2548 break;
2549 default:
2550 (*_bfd_error_handler)
2551 (_("unable to write unknown load command 0x%lx"),
2552 (unsigned long) cmd->type);
2553 return FALSE;
2554 }
2555 }
2556
2557 return TRUE;
2558 }
2559
2560 static void
2561 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2562 bfd_mach_o_section *s)
2563 {
2564 if (seg->sect_head == NULL)
2565 seg->sect_head = s;
2566 else
2567 seg->sect_tail->next = s;
2568 seg->sect_tail = s;
2569 }
2570
2571 /* Create section Mach-O flags from BFD flags. */
2572
2573 static void
2574 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2575 asection *sec)
2576 {
2577 flagword bfd_flags;
2578 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2579
2580 /* Create default flags. */
2581 bfd_flags = bfd_get_section_flags (abfd, sec);
2582 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2583 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2584 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2585 | BFD_MACH_O_S_REGULAR;
2586 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2587 s->flags = BFD_MACH_O_S_ZEROFILL;
2588 else if (bfd_flags & SEC_DEBUGGING)
2589 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2590 else
2591 s->flags = BFD_MACH_O_S_REGULAR;
2592 }
2593
2594 static bfd_boolean
2595 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2596 {
2597 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2598 unsigned int i, j;
2599
2600 seg->vmaddr = 0;
2601 seg->fileoff = mdata->filelen;
2602 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2603 | BFD_MACH_O_PROT_EXECUTE;
2604 seg->maxprot = seg->initprot;
2605
2606 /* Append sections to the segment.
2607
2608 This is a little tedious, we have to honor the need to account zerofill
2609 sections after all the rest. This forces us to do the calculation of
2610 total vmsize in three passes so that any alignment increments are
2611 properly accounted. */
2612 for (i = 0; i < mdata->nsects; ++i)
2613 {
2614 bfd_mach_o_section *s = mdata->sections[i];
2615 asection *sec = s->bfdsection;
2616
2617 /* Although we account for zerofill section sizes in vm order, they are
2618 placed in the file in source sequence. */
2619 bfd_mach_o_append_section_to_segment (seg, s);
2620 s->offset = 0;
2621
2622 /* Zerofill sections have zero file size & offset, the only content
2623 written to the file is the symbols. */
2624 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2625 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2626 == BFD_MACH_O_S_GB_ZEROFILL))
2627 continue;
2628
2629 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2630 sections, even those with zero size. */
2631 if (s->size > 0)
2632 {
2633 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2634 seg->vmsize += s->size;
2635
2636 /* MH_OBJECT files have unaligned content. */
2637 if (1)
2638 {
2639 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2640 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2641 }
2642 seg->filesize += s->size;
2643
2644 /* The system tools write even zero-sized sections with an offset
2645 field set to the current file position. */
2646 s->offset = mdata->filelen;
2647 }
2648
2649 sec->filepos = s->offset;
2650 mdata->filelen += s->size;
2651 }
2652
2653 /* Now pass through again, for zerofill, only now we just update the
2654 vmsize, and then for zerofill_GB. */
2655 for (j = 0; j < 2; j++)
2656 {
2657 unsigned int stype;
2658
2659 if (j == 0)
2660 stype = BFD_MACH_O_S_ZEROFILL;
2661 else
2662 stype = BFD_MACH_O_S_GB_ZEROFILL;
2663
2664 for (i = 0; i < mdata->nsects; ++i)
2665 {
2666 bfd_mach_o_section *s = mdata->sections[i];
2667
2668 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2669 continue;
2670
2671 if (s->size > 0)
2672 {
2673 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2674 seg->vmsize += s->size;
2675 }
2676 }
2677 }
2678
2679 /* Allocate space for the relocations. */
2680 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2681
2682 for (i = 0; i < mdata->nsects; ++i)
2683 {
2684 bfd_mach_o_section *ms = mdata->sections[i];
2685 asection *sec = ms->bfdsection;
2686
2687 ms->nreloc = sec->reloc_count;
2688 if (ms->nreloc == 0)
2689 {
2690 /* Clear nreloc and reloff if there is no relocs. */
2691 ms->reloff = 0;
2692 continue;
2693 }
2694 sec->rel_filepos = mdata->filelen;
2695 ms->reloff = sec->rel_filepos;
2696 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2697 }
2698
2699 return TRUE;
2700 }
2701
2702 static bfd_boolean
2703 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2704 {
2705 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2706 unsigned int i;
2707 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2708 bfd_vma vma;
2709 bfd_mach_o_section *s;
2710
2711 seg->vmsize = 0;
2712
2713 seg->fileoff = mdata->filelen;
2714 seg->maxprot = 0;
2715 seg->initprot = 0;
2716 seg->flags = 0;
2717
2718 /* Append sections to the segment. We assume they are properly ordered
2719 by vma (but we check that). */
2720 vma = 0;
2721 for (i = 0; i < mdata->nsects; ++i)
2722 {
2723 s = mdata->sections[i];
2724
2725 /* Consider only sections for this segment. */
2726 if (strcmp (seg->segname, s->segname) != 0)
2727 continue;
2728
2729 bfd_mach_o_append_section_to_segment (seg, s);
2730
2731 BFD_ASSERT (s->addr >= vma);
2732 vma = s->addr + s->size;
2733 }
2734
2735 /* Set segment file offset: make it page aligned. */
2736 vma = seg->sect_head->addr;
2737 seg->vmaddr = vma & ~pagemask;
2738 if ((mdata->filelen & pagemask) > (vma & pagemask))
2739 mdata->filelen += pagemask + 1;
2740 seg->fileoff = mdata->filelen & ~pagemask;
2741 mdata->filelen = seg->fileoff + (vma & pagemask);
2742
2743 /* Set section file offset. */
2744 for (s = seg->sect_head; s != NULL; s = s->next)
2745 {
2746 asection *sec = s->bfdsection;
2747 flagword flags = bfd_get_section_flags (abfd, sec);
2748
2749 /* Adjust segment size. */
2750 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2751 seg->vmsize += s->size;
2752
2753 /* File offset and length. */
2754 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2755
2756 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2757 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2758 != BFD_MACH_O_S_GB_ZEROFILL))
2759 {
2760 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2761
2762 s->offset = mdata->filelen;
2763 s->bfdsection->filepos = s->offset;
2764
2765 seg->filesize += s->size;
2766 mdata->filelen += s->size;
2767 }
2768 else
2769 {
2770 s->offset = 0;
2771 s->bfdsection->filepos = 0;
2772 }
2773
2774 /* Set protection. */
2775 if (flags & SEC_LOAD)
2776 {
2777 if (flags & SEC_CODE)
2778 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2779 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2780 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2781 }
2782
2783 /* Relocs shouldn't appear in non-object files. */
2784 if (s->bfdsection->reloc_count != 0)
2785 return FALSE;
2786 }
2787
2788 /* Set maxprot. */
2789 if (seg->initprot != 0)
2790 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2791 | BFD_MACH_O_PROT_EXECUTE;
2792 else
2793 seg->maxprot = 0;
2794
2795 /* Round segment size (and file size). */
2796 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2797 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2798 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2799
2800 return TRUE;
2801 }
2802
2803 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2804 fields in header. */
2805
2806 static void
2807 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2808 {
2809 unsigned wide = mach_o_wide_p (&mdata->header);
2810 unsigned int hdrlen;
2811 ufile_ptr offset;
2812 bfd_mach_o_load_command *cmd;
2813 unsigned int align;
2814
2815 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2816 align = wide ? 8 - 1 : 4 - 1;
2817 offset = hdrlen;
2818 mdata->header.ncmds = 0;
2819
2820 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2821 {
2822 mdata->header.ncmds++;
2823 cmd->offset = offset;
2824
2825 switch (cmd->type)
2826 {
2827 case BFD_MACH_O_LC_SEGMENT_64:
2828 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2829 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2830 break;
2831 case BFD_MACH_O_LC_SEGMENT:
2832 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2833 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2834 break;
2835 case BFD_MACH_O_LC_SYMTAB:
2836 cmd->len = sizeof (struct mach_o_symtab_command_external)
2837 + BFD_MACH_O_LC_SIZE;
2838 break;
2839 case BFD_MACH_O_LC_DYSYMTAB:
2840 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2841 + BFD_MACH_O_LC_SIZE;
2842 break;
2843 case BFD_MACH_O_LC_LOAD_DYLIB:
2844 cmd->len = sizeof (struct mach_o_dylib_command_external)
2845 + BFD_MACH_O_LC_SIZE;
2846 cmd->command.dylib.name_offset = cmd->len;
2847 cmd->len += strlen (cmd->command.dylib.name_str);
2848 cmd->len = (cmd->len + align) & ~align;
2849 break;
2850 case BFD_MACH_O_LC_LOAD_DYLINKER:
2851 cmd->len = sizeof (struct mach_o_str_command_external)
2852 + BFD_MACH_O_LC_SIZE;
2853 cmd->command.dylinker.name_offset = cmd->len;
2854 cmd->len += strlen (cmd->command.dylinker.name_str);
2855 cmd->len = (cmd->len + align) & ~align;
2856 break;
2857 case BFD_MACH_O_LC_MAIN:
2858 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2859 + BFD_MACH_O_LC_SIZE;
2860 break;
2861 case BFD_MACH_O_LC_DYLD_INFO:
2862 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2863 + BFD_MACH_O_LC_SIZE;
2864 break;
2865 default:
2866 (*_bfd_error_handler)
2867 (_("unable to layout unknown load command 0x%lx"),
2868 (unsigned long) cmd->type);
2869 break;
2870 }
2871
2872 BFD_ASSERT (cmd->len % (align + 1) == 0);
2873 offset += cmd->len;
2874 }
2875 mdata->header.sizeofcmds = offset - hdrlen;
2876 mdata->filelen = offset;
2877 }
2878
2879 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2880 segment. */
2881
2882 static void
2883 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2884 bfd_mach_o_load_command *cmd,
2885 const char *segname, unsigned int nbr_sect)
2886 {
2887 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2888 unsigned wide = mach_o_wide_p (&mdata->header);
2889
2890 /* Init segment command. */
2891 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2892 cmd->type_required = FALSE;
2893
2894 strcpy (seg->segname, segname);
2895 seg->nsects = nbr_sect;
2896
2897 seg->vmaddr = 0;
2898 seg->vmsize = 0;
2899
2900 seg->fileoff = 0;
2901 seg->filesize = 0;
2902 seg->maxprot = 0;
2903 seg->initprot = 0;
2904 seg->flags = 0;
2905 seg->sect_head = NULL;
2906 seg->sect_tail = NULL;
2907 }
2908
2909 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2910 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2911 and copy functionality. */
2912
2913 bfd_boolean
2914 bfd_mach_o_build_commands (bfd *abfd)
2915 {
2916 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2917 unsigned wide = mach_o_wide_p (&mdata->header);
2918 unsigned int nbr_segcmd = 0;
2919 bfd_mach_o_load_command *commands;
2920 unsigned int nbr_commands;
2921 int symtab_idx = -1;
2922 int dysymtab_idx = -1;
2923 int main_idx = -1;
2924 unsigned int i;
2925
2926 /* Return now if already built. */
2927 if (mdata->header.ncmds != 0)
2928 return TRUE;
2929
2930 /* Fill in the file type, if not already set. */
2931 if (mdata->header.filetype == 0)
2932 {
2933 if (abfd->flags & EXEC_P)
2934 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2935 else if (abfd->flags & DYNAMIC)
2936 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2937 else
2938 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2939 }
2940
2941 /* If hasn't already been done, flatten sections list, and sort
2942 if/when required. Must be done before the symbol table is adjusted,
2943 since that depends on properly numbered sections. */
2944 if (mdata->nsects == 0 || mdata->sections == NULL)
2945 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2946 return FALSE;
2947
2948 /* Order the symbol table, fill-in/check mach-o specific fields and
2949 partition out any indirect symbols. */
2950 if (!bfd_mach_o_mangle_symbols (abfd))
2951 return FALSE;
2952
2953 /* Segment commands. */
2954 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
2955 {
2956 /* Only one segment for all the sections. But the segment is
2957 optional if there is no sections. */
2958 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
2959 }
2960 else
2961 {
2962 bfd_mach_o_section *prev_sect = NULL;
2963
2964 /* One pagezero segment and one linkedit segment. */
2965 nbr_segcmd = 2;
2966
2967 /* Create one segment for associated segment name in sections.
2968 Assume that sections with the same segment name are consecutive. */
2969 for (i = 0; i < mdata->nsects; i++)
2970 {
2971 bfd_mach_o_section *this_sect = mdata->sections[i];
2972
2973 if (prev_sect == NULL
2974 || strcmp (prev_sect->segname, this_sect->segname) != 0)
2975 {
2976 nbr_segcmd++;
2977 prev_sect = this_sect;
2978 }
2979 }
2980 }
2981
2982 nbr_commands = nbr_segcmd;
2983
2984 /* One command for the symbol table (only if there are symbols. */
2985 if (bfd_get_symcount (abfd) > 0)
2986 symtab_idx = nbr_commands++;
2987
2988 /* FIXME:
2989 This is a rather crude test for whether we should build a dysymtab. */
2990 if (bfd_mach_o_should_emit_dysymtab ()
2991 && bfd_get_symcount (abfd))
2992 {
2993 /* If there should be a case where a dysymtab could be emitted without
2994 a symtab (seems improbable), this would need amending. */
2995 dysymtab_idx = nbr_commands++;
2996 }
2997
2998 /* Add an entry point command. */
2999 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3000 && bfd_get_start_address (abfd) != 0)
3001 main_idx = nbr_commands++;
3002
3003 /* Well, we must have a header, at least. */
3004 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3005
3006 /* A bit unusual, but no content is valid;
3007 as -n empty.s -o empty.o */
3008 if (nbr_commands == 0)
3009 {
3010 /* Layout commands (well none...) and set headers command fields. */
3011 bfd_mach_o_layout_commands (mdata);
3012 return TRUE;
3013 }
3014
3015 /* Create commands for segments (and symtabs), prepend them. */
3016 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3017 if (commands == NULL)
3018 return FALSE;
3019 for (i = 0; i < nbr_commands - 1; i++)
3020 commands[i].next = &commands[i + 1];
3021 commands[nbr_commands - 1].next = mdata->first_command;
3022 if (mdata->first_command == NULL)
3023 mdata->last_command = &commands[nbr_commands - 1];
3024 mdata->first_command = &commands[0];
3025
3026 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3027 {
3028 /* For object file, there is only one segment. */
3029 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3030 }
3031 else if (nbr_segcmd != 0)
3032 {
3033 bfd_mach_o_load_command *cmd;
3034
3035 BFD_ASSERT (nbr_segcmd >= 2);
3036
3037 /* The pagezero. */
3038 cmd = &commands[0];
3039 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3040
3041 /* Segments from sections. */
3042 cmd++;
3043 for (i = 0; i < mdata->nsects;)
3044 {
3045 const char *segname = mdata->sections[i]->segname;
3046 unsigned int nbr_sect = 1;
3047
3048 /* Count number of sections for this segment. */
3049 for (i++; i < mdata->nsects; i++)
3050 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3051 nbr_sect++;
3052 else
3053 break;
3054
3055 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3056 cmd++;
3057 }
3058
3059 /* The linkedit. */
3060 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3061 }
3062
3063 if (symtab_idx >= 0)
3064 {
3065 /* Init symtab command. */
3066 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3067
3068 cmd->type = BFD_MACH_O_LC_SYMTAB;
3069 cmd->type_required = FALSE;
3070 }
3071
3072 /* If required, setup symtab command, see comment above about the quality
3073 of this test. */
3074 if (dysymtab_idx >= 0)
3075 {
3076 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3077
3078 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3079 cmd->type_required = FALSE;
3080 }
3081
3082 /* Create the main command. */
3083 if (main_idx >= 0)
3084 {
3085 bfd_mach_o_load_command *cmd = &commands[main_idx];
3086
3087 cmd->type = BFD_MACH_O_LC_MAIN;
3088 cmd->type_required = TRUE;
3089
3090 cmd->command.main.entryoff = 0;
3091 cmd->command.main.stacksize = 0;
3092 }
3093
3094 /* Layout commands. */
3095 bfd_mach_o_layout_commands (mdata);
3096
3097 /* So, now we have sized the commands and the filelen set to that.
3098 Now we can build the segment command and set the section file offsets. */
3099 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3100 {
3101 for (i = 0; i < nbr_segcmd; i++)
3102 if (!bfd_mach_o_build_obj_seg_command
3103 (abfd, &commands[i].command.segment))
3104 return FALSE;
3105 }
3106 else
3107 {
3108 bfd_vma maxvma = 0;
3109
3110 /* Skip pagezero and linkedit segments. */
3111 for (i = 1; i < nbr_segcmd - 1; i++)
3112 {
3113 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3114
3115 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3116 return FALSE;
3117
3118 if (seg->vmaddr + seg->vmsize > maxvma)
3119 maxvma = seg->vmaddr + seg->vmsize;
3120 }
3121
3122 /* Set the size of __PAGEZERO. */
3123 commands[0].command.segment.vmsize =
3124 commands[1].command.segment.vmaddr;
3125
3126 /* Set the vma and fileoff of __LINKEDIT. */
3127 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3128 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3129
3130 /* Set entry point (once segments have been laid out). */
3131 if (main_idx >= 0)
3132 commands[main_idx].command.main.entryoff =
3133 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3134 }
3135
3136 return TRUE;
3137 }
3138
3139 /* Set the contents of a section. */
3140
3141 bfd_boolean
3142 bfd_mach_o_set_section_contents (bfd *abfd,
3143 asection *section,
3144 const void * location,
3145 file_ptr offset,
3146 bfd_size_type count)
3147 {
3148 file_ptr pos;
3149
3150 /* Trying to write the first section contents will trigger the creation of
3151 the load commands if they are not already present. */
3152 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3153 return FALSE;
3154
3155 if (count == 0)
3156 return TRUE;
3157
3158 pos = section->filepos + offset;
3159 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3160 || bfd_bwrite (location, count, abfd) != count)
3161 return FALSE;
3162
3163 return TRUE;
3164 }
3165
3166 int
3167 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3168 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3169 {
3170 return 0;
3171 }
3172
3173 /* Make an empty symbol. This is required only because
3174 bfd_make_section_anyway wants to create a symbol for the section. */
3175
3176 asymbol *
3177 bfd_mach_o_make_empty_symbol (bfd *abfd)
3178 {
3179 asymbol *new_symbol;
3180
3181 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3182 if (new_symbol == NULL)
3183 return new_symbol;
3184 new_symbol->the_bfd = abfd;
3185 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3186 return new_symbol;
3187 }
3188
3189 static bfd_boolean
3190 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
3191 {
3192 struct mach_o_header_external raw;
3193 unsigned int size;
3194 bfd_vma (*get32) (const void *) = NULL;
3195
3196 /* Just read the magic number. */
3197 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3198 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3199 return FALSE;
3200
3201 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3202 {
3203 header->byteorder = BFD_ENDIAN_BIG;
3204 header->magic = BFD_MACH_O_MH_MAGIC;
3205 header->version = 1;
3206 get32 = bfd_getb32;
3207 }
3208 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3209 {
3210 header->byteorder = BFD_ENDIAN_LITTLE;
3211 header->magic = BFD_MACH_O_MH_MAGIC;
3212 header->version = 1;
3213 get32 = bfd_getl32;
3214 }
3215 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3216 {
3217 header->byteorder = BFD_ENDIAN_BIG;
3218 header->magic = BFD_MACH_O_MH_MAGIC_64;
3219 header->version = 2;
3220 get32 = bfd_getb32;
3221 }
3222 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3223 {
3224 header->byteorder = BFD_ENDIAN_LITTLE;
3225 header->magic = BFD_MACH_O_MH_MAGIC_64;
3226 header->version = 2;
3227 get32 = bfd_getl32;
3228 }
3229 else
3230 {
3231 header->byteorder = BFD_ENDIAN_UNKNOWN;
3232 return FALSE;
3233 }
3234
3235 /* Once the size of the header is known, read the full header. */
3236 size = mach_o_wide_p (header) ?
3237 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3238
3239 if (bfd_seek (abfd, 0, SEEK_SET) != 0
3240 || bfd_bread (&raw, size, abfd) != size)
3241 return FALSE;
3242
3243 header->cputype = (*get32) (raw.cputype);
3244 header->cpusubtype = (*get32) (raw.cpusubtype);
3245 header->filetype = (*get32) (raw.filetype);
3246 header->ncmds = (*get32) (raw.ncmds);
3247 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3248 header->flags = (*get32) (raw.flags);
3249
3250 if (mach_o_wide_p (header))
3251 header->reserved = (*get32) (raw.reserved);
3252 else
3253 header->reserved = 0;
3254
3255 return TRUE;
3256 }
3257
3258 bfd_boolean
3259 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3260 {
3261 bfd_mach_o_section *s;
3262 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3263
3264 s = bfd_mach_o_get_mach_o_section (sec);
3265 if (s == NULL)
3266 {
3267 flagword bfd_flags;
3268 static const mach_o_section_name_xlat * xlat;
3269
3270 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3271 if (s == NULL)
3272 return FALSE;
3273 sec->used_by_bfd = s;
3274 s->bfdsection = sec;
3275
3276 /* Create the Darwin seg/sect name pair from the bfd name.
3277 If this is a canonical name for which a specific paiting exists
3278 there will also be defined flags, type, attribute and alignment
3279 values. */
3280 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3281 if (xlat != NULL)
3282 {
3283 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3284 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3285 : bfdalign;
3286 (void) bfd_set_section_alignment (abfd, sec, s->align);
3287 bfd_flags = bfd_get_section_flags (abfd, sec);
3288 if (bfd_flags == SEC_NO_FLAGS)
3289 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3290 }
3291 else
3292 /* Create default flags. */
3293 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3294 }
3295
3296 return _bfd_generic_new_section_hook (abfd, sec);
3297 }
3298
3299 static void
3300 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3301 unsigned long prot)
3302 {
3303 flagword flags;
3304 bfd_mach_o_section *section;
3305
3306 flags = bfd_get_section_flags (abfd, sec);
3307 section = bfd_mach_o_get_mach_o_section (sec);
3308
3309 /* TODO: see if we should use the xlat system for doing this by
3310 preference and fall back to this for unknown sections. */
3311
3312 if (flags == SEC_NO_FLAGS)
3313 {
3314 /* Try to guess flags. */
3315 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3316 flags = SEC_DEBUGGING;
3317 else
3318 {
3319 flags = SEC_ALLOC;
3320 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3321 != BFD_MACH_O_S_ZEROFILL)
3322 {
3323 flags |= SEC_LOAD;
3324 if (prot & BFD_MACH_O_PROT_EXECUTE)
3325 flags |= SEC_CODE;
3326 if (prot & BFD_MACH_O_PROT_WRITE)
3327 flags |= SEC_DATA;
3328 else if (prot & BFD_MACH_O_PROT_READ)
3329 flags |= SEC_READONLY;
3330 }
3331 }
3332 }
3333 else
3334 {
3335 if ((flags & SEC_DEBUGGING) == 0)
3336 flags |= SEC_ALLOC;
3337 }
3338
3339 if (section->offset != 0)
3340 flags |= SEC_HAS_CONTENTS;
3341 if (section->nreloc != 0)
3342 flags |= SEC_RELOC;
3343
3344 bfd_set_section_flags (abfd, sec, flags);
3345
3346 sec->vma = section->addr;
3347 sec->lma = section->addr;
3348 sec->size = section->size;
3349 sec->filepos = section->offset;
3350 sec->alignment_power = section->align;
3351 sec->segment_mark = 0;
3352 sec->reloc_count = section->nreloc;
3353 sec->rel_filepos = section->reloff;
3354 }
3355
3356 static asection *
3357 bfd_mach_o_make_bfd_section (bfd *abfd,
3358 const unsigned char *segname,
3359 const unsigned char *sectname)
3360 {
3361 const char *sname;
3362 flagword flags;
3363
3364 bfd_mach_o_convert_section_name_to_bfd
3365 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3366 if (sname == NULL)
3367 return NULL;
3368
3369 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3370 }
3371
3372 static asection *
3373 bfd_mach_o_read_section_32 (bfd *abfd,
3374 unsigned int offset,
3375 unsigned long prot)
3376 {
3377 struct mach_o_section_32_external raw;
3378 asection *sec;
3379 bfd_mach_o_section *section;
3380
3381 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3382 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3383 != BFD_MACH_O_SECTION_SIZE))
3384 return NULL;
3385
3386 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3387 if (sec == NULL)
3388 return NULL;
3389
3390 section = bfd_mach_o_get_mach_o_section (sec);
3391 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3392 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3393 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3394 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3395 section->addr = bfd_h_get_32 (abfd, raw.addr);
3396 section->size = bfd_h_get_32 (abfd, raw.size);
3397 section->offset = bfd_h_get_32 (abfd, raw.offset);
3398 section->align = bfd_h_get_32 (abfd, raw.align);
3399 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3400 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3401 section->flags = bfd_h_get_32 (abfd, raw.flags);
3402 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3403 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3404 section->reserved3 = 0;
3405
3406 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3407
3408 return sec;
3409 }
3410
3411 static asection *
3412 bfd_mach_o_read_section_64 (bfd *abfd,
3413 unsigned int offset,
3414 unsigned long prot)
3415 {
3416 struct mach_o_section_64_external raw;
3417 asection *sec;
3418 bfd_mach_o_section *section;
3419
3420 if (bfd_seek (abfd, offset, SEEK_SET) != 0
3421 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3422 != BFD_MACH_O_SECTION_64_SIZE))
3423 return NULL;
3424
3425 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3426 if (sec == NULL)
3427 return NULL;
3428
3429 section = bfd_mach_o_get_mach_o_section (sec);
3430 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3431 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3432 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3433 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3434 section->addr = bfd_h_get_64 (abfd, raw.addr);
3435 section->size = bfd_h_get_64 (abfd, raw.size);
3436 section->offset = bfd_h_get_32 (abfd, raw.offset);
3437 section->align = bfd_h_get_32 (abfd, raw.align);
3438 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3439 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3440 section->flags = bfd_h_get_32 (abfd, raw.flags);
3441 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3442 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3443 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3444
3445 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3446
3447 return sec;
3448 }
3449
3450 static asection *
3451 bfd_mach_o_read_section (bfd *abfd,
3452 unsigned int offset,
3453 unsigned long prot,
3454 unsigned int wide)
3455 {
3456 if (wide)
3457 return bfd_mach_o_read_section_64 (abfd, offset, prot);
3458 else
3459 return bfd_mach_o_read_section_32 (abfd, offset, prot);
3460 }
3461
3462 static bfd_boolean
3463 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3464 bfd_mach_o_symtab_command *sym,
3465 bfd_mach_o_asymbol *s,
3466 unsigned long i)
3467 {
3468 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3469 unsigned int wide = mach_o_wide_p (&mdata->header);
3470 unsigned int symwidth =
3471 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3472 unsigned int symoff = sym->symoff + (i * symwidth);
3473 struct mach_o_nlist_64_external raw;
3474 unsigned char type = -1;
3475 unsigned char section = -1;
3476 short desc = -1;
3477 symvalue value = -1;
3478 unsigned long stroff = -1;
3479 unsigned int symtype = -1;
3480
3481 BFD_ASSERT (sym->strtab != NULL);
3482
3483 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3484 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3485 {
3486 (*_bfd_error_handler)
3487 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3488 symwidth, (unsigned long) symoff);
3489 return FALSE;
3490 }
3491
3492 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3493 type = bfd_h_get_8 (abfd, raw.n_type);
3494 symtype = type & BFD_MACH_O_N_TYPE;
3495 section = bfd_h_get_8 (abfd, raw.n_sect);
3496 desc = bfd_h_get_16 (abfd, raw.n_desc);
3497 if (wide)
3498 value = bfd_h_get_64 (abfd, raw.n_value);
3499 else
3500 value = bfd_h_get_32 (abfd, raw.n_value);
3501
3502 if (stroff >= sym->strsize)
3503 {
3504 (*_bfd_error_handler)
3505 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3506 (unsigned long) stroff,
3507 (unsigned long) sym->strsize);
3508 return FALSE;
3509 }
3510
3511 s->symbol.the_bfd = abfd;
3512 s->symbol.name = sym->strtab + stroff;
3513 s->symbol.value = value;
3514 s->symbol.flags = 0x0;
3515 s->symbol.udata.i = i;
3516 s->n_type = type;
3517 s->n_sect = section;
3518 s->n_desc = desc;
3519
3520 if (type & BFD_MACH_O_N_STAB)
3521 {
3522 s->symbol.flags |= BSF_DEBUGGING;
3523 s->symbol.section = bfd_und_section_ptr;
3524 switch (type)
3525 {
3526 case N_FUN:
3527 case N_STSYM:
3528 case N_LCSYM:
3529 case N_BNSYM:
3530 case N_SLINE:
3531 case N_ENSYM:
3532 case N_ECOMM:
3533 case N_ECOML:
3534 case N_GSYM:
3535 if ((section > 0) && (section <= mdata->nsects))
3536 {
3537 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3538 s->symbol.value =
3539 s->symbol.value - mdata->sections[section - 1]->addr;
3540 }
3541 break;
3542 }
3543 }
3544 else
3545 {
3546 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3547 s->symbol.flags |= BSF_GLOBAL;
3548 else
3549 s->symbol.flags |= BSF_LOCAL;
3550
3551 switch (symtype)
3552 {
3553 case BFD_MACH_O_N_UNDF:
3554 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3555 && s->symbol.value != 0)
3556 {
3557 /* A common symbol. */
3558 s->symbol.section = bfd_com_section_ptr;
3559 s->symbol.flags = BSF_NO_FLAGS;
3560 }
3561 else
3562 {
3563 s->symbol.section = bfd_und_section_ptr;
3564 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3565 s->symbol.flags |= BSF_WEAK;
3566 }
3567 break;
3568 case BFD_MACH_O_N_PBUD:
3569 s->symbol.section = bfd_und_section_ptr;
3570 break;
3571 case BFD_MACH_O_N_ABS:
3572 s->symbol.section = bfd_abs_section_ptr;
3573 break;
3574 case BFD_MACH_O_N_SECT:
3575 if ((section > 0) && (section <= mdata->nsects))
3576 {
3577 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3578 s->symbol.value =
3579 s->symbol.value - mdata->sections[section - 1]->addr;
3580 }
3581 else
3582 {
3583 /* Mach-O uses 0 to mean "no section"; not an error. */
3584 if (section != 0)
3585 {
3586 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3587 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3588 s->symbol.name, section, mdata->nsects);
3589 }
3590 s->symbol.section = bfd_und_section_ptr;
3591 }
3592 break;
3593 case BFD_MACH_O_N_INDR:
3594 /* FIXME: we don't follow the BFD convention as this indirect symbol
3595 won't be followed by the referenced one. This looks harmless
3596 unless we start using the linker. */
3597 s->symbol.flags |= BSF_INDIRECT;
3598 s->symbol.section = bfd_ind_section_ptr;
3599 s->symbol.value = 0;
3600 break;
3601 default:
3602 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3603 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3604 s->symbol.name, symtype);
3605 s->symbol.section = bfd_und_section_ptr;
3606 break;
3607 }
3608 }
3609
3610 return TRUE;
3611 }
3612
3613 bfd_boolean
3614 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3615 {
3616 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3617 bfd_mach_o_symtab_command *sym = mdata->symtab;
3618
3619 /* Fail if there is no symtab. */
3620 if (sym == NULL)
3621 return FALSE;
3622
3623 /* Success if already loaded. */
3624 if (sym->strtab)
3625 return TRUE;
3626
3627 if (abfd->flags & BFD_IN_MEMORY)
3628 {
3629 struct bfd_in_memory *b;
3630
3631 b = (struct bfd_in_memory *) abfd->iostream;
3632
3633 if ((sym->stroff + sym->strsize) > b->size)
3634 {
3635 bfd_set_error (bfd_error_file_truncated);
3636 return FALSE;
3637 }
3638 sym->strtab = (char *) b->buffer + sym->stroff;
3639 }
3640 else
3641 {
3642 sym->strtab = bfd_alloc (abfd, sym->strsize);
3643 if (sym->strtab == NULL)
3644 return FALSE;
3645
3646 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3647 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3648 {
3649 bfd_set_error (bfd_error_file_truncated);
3650 return FALSE;
3651 }
3652 }
3653
3654 return TRUE;
3655 }
3656
3657 bfd_boolean
3658 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3659 {
3660 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3661 bfd_mach_o_symtab_command *sym = mdata->symtab;
3662 unsigned long i;
3663
3664 if (sym == NULL || sym->symbols)
3665 /* Return now if there are no symbols or if already loaded. */
3666 return TRUE;
3667
3668 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3669
3670 if (sym->symbols == NULL)
3671 {
3672 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3673 return FALSE;
3674 }
3675
3676 if (!bfd_mach_o_read_symtab_strtab (abfd))
3677 {
3678 sym->symbols = NULL;
3679 return FALSE;
3680 }
3681
3682 for (i = 0; i < sym->nsyms; i++)
3683 {
3684 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3685 {
3686 sym->symbols = NULL;
3687 return FALSE;
3688 }
3689 }
3690
3691 return TRUE;
3692 }
3693
3694 static const char *
3695 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3696 {
3697 switch ((int) flavour)
3698 {
3699 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3700 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3701 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3702 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3703 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3704 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3705 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3706 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3707 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3708 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3709 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3710 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3711 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3712 default: return "UNKNOWN";
3713 }
3714 }
3715
3716 static const char *
3717 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3718 {
3719 switch ((int) flavour)
3720 {
3721 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3722 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3723 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3724 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3725 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3726 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3727 default: return "UNKNOWN";
3728 }
3729 }
3730
3731 static bfd_boolean
3732 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3733 {
3734 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3735 struct mach_o_str_command_external raw;
3736 unsigned int nameoff;
3737 unsigned int namelen;
3738
3739 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3740 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3741 return FALSE;
3742
3743 nameoff = bfd_h_get_32 (abfd, raw.str);
3744
3745 cmd->name_offset = nameoff;
3746 namelen = command->len - nameoff;
3747 nameoff += command->offset;
3748 cmd->name_str = bfd_alloc (abfd, namelen);
3749 if (cmd->name_str == NULL)
3750 return FALSE;
3751 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3752 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3753 return FALSE;
3754 return TRUE;
3755 }
3756
3757 static bfd_boolean
3758 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3759 {
3760 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3761 struct mach_o_dylib_command_external raw;
3762 unsigned int nameoff;
3763 unsigned int namelen;
3764
3765 switch (command->type)
3766 {
3767 case BFD_MACH_O_LC_LOAD_DYLIB:
3768 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3769 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3770 case BFD_MACH_O_LC_ID_DYLIB:
3771 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3772 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3773 break;
3774 default:
3775 BFD_FAIL ();
3776 return FALSE;
3777 }
3778
3779 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3780 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3781 return FALSE;
3782
3783 nameoff = bfd_h_get_32 (abfd, raw.name);
3784 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3785 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3786 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3787
3788 cmd->name_offset = command->offset + nameoff;
3789 namelen = command->len - nameoff;
3790 cmd->name_str = bfd_alloc (abfd, namelen);
3791 if (cmd->name_str == NULL)
3792 return FALSE;
3793 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3794 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3795 return FALSE;
3796 return TRUE;
3797 }
3798
3799 static bfd_boolean
3800 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3801 bfd_mach_o_load_command *command)
3802 {
3803 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3804 struct mach_o_prebound_dylib_command_external raw;
3805 unsigned int nameoff;
3806 unsigned int modoff;
3807 unsigned int str_len;
3808 unsigned char *str;
3809
3810 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3811 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3812 return FALSE;
3813
3814 nameoff = bfd_h_get_32 (abfd, raw.name);
3815 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3816 if (nameoff > command->len || modoff > command->len)
3817 return FALSE;
3818
3819 str_len = command->len - sizeof (raw);
3820 str = bfd_alloc (abfd, str_len);
3821 if (str == NULL)
3822 return FALSE;
3823 if (bfd_bread (str, str_len, abfd) != str_len)
3824 return FALSE;
3825
3826 cmd->name_offset = command->offset + nameoff;
3827 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3828 cmd->linked_modules_offset = command->offset + modoff;
3829
3830 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3831 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3832 return TRUE;
3833 }
3834
3835 static bfd_boolean
3836 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3837 bfd_mach_o_load_command *command)
3838 {
3839 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3840 struct mach_o_prebind_cksum_command_external raw;
3841
3842 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3843 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3844 return FALSE;
3845
3846 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3847 return TRUE;
3848 }
3849
3850 static bfd_boolean
3851 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3852 bfd_mach_o_load_command *command)
3853 {
3854 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3855 struct mach_o_twolevel_hints_command_external raw;
3856
3857 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3858 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3859 return FALSE;
3860
3861 cmd->offset = bfd_get_32 (abfd, raw.offset);
3862 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3863 return TRUE;
3864 }
3865
3866 static bfd_boolean
3867 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3868 {
3869 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3870 struct mach_o_fvmlib_command_external raw;
3871 unsigned int nameoff;
3872 unsigned int namelen;
3873
3874 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3875 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3876 return FALSE;
3877
3878 nameoff = bfd_h_get_32 (abfd, raw.name);
3879 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3880 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3881
3882 fvm->name_offset = command->offset + nameoff;
3883 namelen = command->len - nameoff;
3884 fvm->name_str = bfd_alloc (abfd, namelen);
3885 if (fvm->name_str == NULL)
3886 return FALSE;
3887 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3888 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3889 return FALSE;
3890 return TRUE;
3891 }
3892
3893 static bfd_boolean
3894 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3895 {
3896 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3897 bfd_mach_o_thread_command *cmd = &command->command.thread;
3898 unsigned int offset;
3899 unsigned int nflavours;
3900 unsigned int i;
3901
3902 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3903 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3904
3905 /* Count the number of threads. */
3906 offset = 8;
3907 nflavours = 0;
3908 while (offset != command->len)
3909 {
3910 struct mach_o_thread_command_external raw;
3911
3912 if (offset >= command->len)
3913 return FALSE;
3914
3915 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3916 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3917 return FALSE;
3918
3919 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3920 nflavours++;
3921 }
3922
3923 /* Allocate threads. */
3924 cmd->flavours = bfd_alloc
3925 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3926 if (cmd->flavours == NULL)
3927 return FALSE;
3928 cmd->nflavours = nflavours;
3929
3930 offset = 8;
3931 nflavours = 0;
3932 while (offset != command->len)
3933 {
3934 struct mach_o_thread_command_external raw;
3935
3936 if (offset >= command->len)
3937 return FALSE;
3938
3939 if (nflavours >= cmd->nflavours)
3940 return FALSE;
3941
3942 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3943 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3944 return FALSE;
3945
3946 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3947 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3948 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3949 offset += cmd->flavours[nflavours].size + sizeof (raw);
3950 nflavours++;
3951 }
3952
3953 for (i = 0; i < nflavours; i++)
3954 {
3955 asection *bfdsec;
3956 unsigned int snamelen;
3957 char *sname;
3958 const char *flavourstr;
3959 const char *prefix = "LC_THREAD";
3960 unsigned int j = 0;
3961
3962 switch (mdata->header.cputype)
3963 {
3964 case BFD_MACH_O_CPU_TYPE_POWERPC:
3965 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3966 flavourstr =
3967 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3968 break;
3969 case BFD_MACH_O_CPU_TYPE_I386:
3970 case BFD_MACH_O_CPU_TYPE_X86_64:
3971 flavourstr =
3972 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3973 break;
3974 default:
3975 flavourstr = "UNKNOWN_ARCHITECTURE";
3976 break;
3977 }
3978
3979 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3980 sname = bfd_alloc (abfd, snamelen);
3981 if (sname == NULL)
3982 return FALSE;
3983
3984 for (;;)
3985 {
3986 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3987 if (bfd_get_section_by_name (abfd, sname) == NULL)
3988 break;
3989 j++;
3990 }
3991
3992 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
3993
3994 bfdsec->vma = 0;
3995 bfdsec->lma = 0;
3996 bfdsec->size = cmd->flavours[i].size;
3997 bfdsec->filepos = cmd->flavours[i].offset;
3998 bfdsec->alignment_power = 0x0;
3999
4000 cmd->section = bfdsec;
4001 }
4002
4003 return TRUE;
4004 }
4005
4006 static bfd_boolean
4007 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4008 {
4009 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4010 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4011
4012 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4013
4014 {
4015 struct mach_o_dysymtab_command_external raw;
4016
4017 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4018 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4019 return FALSE;
4020
4021 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4022 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4023 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4024 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4025 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4026 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4027 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4028 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4029 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4030 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4031 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4032 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4033 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4034 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4035 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4036 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4037 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4038 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4039 }
4040
4041 if (cmd->nmodtab != 0)
4042 {
4043 unsigned int i;
4044 int wide = bfd_mach_o_wide_p (abfd);
4045 unsigned int module_len = wide ? 56 : 52;
4046
4047 cmd->dylib_module =
4048 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
4049 if (cmd->dylib_module == NULL)
4050 return FALSE;
4051
4052 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4053 return FALSE;
4054
4055 for (i = 0; i < cmd->nmodtab; i++)
4056 {
4057 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4058 unsigned long v;
4059 unsigned char buf[56];
4060
4061 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4062 return FALSE;
4063
4064 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4065 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4066 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4067 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4068 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4069 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4070 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4071 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4072 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4073 v = bfd_h_get_32 (abfd, buf +36);
4074 module->iinit = v & 0xffff;
4075 module->iterm = (v >> 16) & 0xffff;
4076 v = bfd_h_get_32 (abfd, buf + 40);
4077 module->ninit = v & 0xffff;
4078 module->nterm = (v >> 16) & 0xffff;
4079 if (wide)
4080 {
4081 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4082 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4083 }
4084 else
4085 {
4086 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4087 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4088 }
4089 }
4090 }
4091
4092 if (cmd->ntoc != 0)
4093 {
4094 unsigned int i;
4095
4096 cmd->dylib_toc = bfd_alloc
4097 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
4098 if (cmd->dylib_toc == NULL)
4099 return FALSE;
4100
4101 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4102 return FALSE;
4103
4104 for (i = 0; i < cmd->ntoc; i++)
4105 {
4106 struct mach_o_dylib_table_of_contents_external raw;
4107 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4108
4109 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4110 return FALSE;
4111
4112 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4113 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4114 }
4115 }
4116
4117 if (cmd->nindirectsyms != 0)
4118 {
4119 unsigned int i;
4120
4121 cmd->indirect_syms = bfd_alloc
4122 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
4123 if (cmd->indirect_syms == NULL)
4124 return FALSE;
4125
4126 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4127 return FALSE;
4128
4129 for (i = 0; i < cmd->nindirectsyms; i++)
4130 {
4131 unsigned char raw[4];
4132 unsigned int *is = &cmd->indirect_syms[i];
4133
4134 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4135 return FALSE;
4136
4137 *is = bfd_h_get_32 (abfd, raw);
4138 }
4139 }
4140
4141 if (cmd->nextrefsyms != 0)
4142 {
4143 unsigned long v;
4144 unsigned int i;
4145
4146 cmd->ext_refs = bfd_alloc
4147 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
4148 if (cmd->ext_refs == NULL)
4149 return FALSE;
4150
4151 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4152 return FALSE;
4153
4154 for (i = 0; i < cmd->nextrefsyms; i++)
4155 {
4156 unsigned char raw[4];
4157 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4158
4159 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4160 return FALSE;
4161
4162 /* Fields isym and flags are written as bit-fields, thus we need
4163 a specific processing for endianness. */
4164 v = bfd_h_get_32 (abfd, raw);
4165 if (bfd_big_endian (abfd))
4166 {
4167 ref->isym = (v >> 8) & 0xffffff;
4168 ref->flags = v & 0xff;
4169 }
4170 else
4171 {
4172 ref->isym = v & 0xffffff;
4173 ref->flags = (v >> 24) & 0xff;
4174 }
4175 }
4176 }
4177
4178 if (mdata->dysymtab)
4179 return FALSE;
4180 mdata->dysymtab = cmd;
4181
4182 return TRUE;
4183 }
4184
4185 static bfd_boolean
4186 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4187 {
4188 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4189 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4190 struct mach_o_symtab_command_external raw;
4191
4192 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4193
4194 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4195 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4196 return FALSE;
4197
4198 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4199 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4200 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4201 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4202 symtab->symbols = NULL;
4203 symtab->strtab = NULL;
4204
4205 if (symtab->nsyms != 0)
4206 abfd->flags |= HAS_SYMS;
4207
4208 if (mdata->symtab)
4209 return FALSE;
4210 mdata->symtab = symtab;
4211 return TRUE;
4212 }
4213
4214 static bfd_boolean
4215 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4216 {
4217 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4218
4219 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4220
4221 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4222 || bfd_bread (cmd->uuid, 16, abfd) != 16)
4223 return FALSE;
4224
4225 return TRUE;
4226 }
4227
4228 static bfd_boolean
4229 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4230 {
4231 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4232 struct mach_o_linkedit_data_command_external raw;
4233
4234 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4235 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4236 return FALSE;
4237
4238 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4239 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4240 return TRUE;
4241 }
4242
4243 static bfd_boolean
4244 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4245 {
4246 bfd_mach_o_str_command *cmd = &command->command.str;
4247 struct mach_o_str_command_external raw;
4248 unsigned long off;
4249
4250 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4251 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4252 return FALSE;
4253
4254 off = bfd_get_32 (abfd, raw.str);
4255 cmd->stroff = command->offset + off;
4256 cmd->str_len = command->len - off;
4257 cmd->str = bfd_alloc (abfd, cmd->str_len);
4258 if (cmd->str == NULL)
4259 return FALSE;
4260 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4261 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4262 return FALSE;
4263 return TRUE;
4264 }
4265
4266 static unsigned char *
4267 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4268 {
4269 unsigned char *buf;
4270
4271 buf = bfd_alloc (abfd, size);
4272 if (buf == NULL)
4273 return NULL;
4274 if (bfd_seek (abfd, off, SEEK_SET) != 0
4275 || bfd_bread (buf, size, abfd) != size)
4276 return NULL;
4277 return buf;
4278 }
4279
4280 static bfd_boolean
4281 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4282 {
4283 /* Read rebase content. */
4284 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4285 {
4286 cmd->rebase_content =
4287 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4288 if (cmd->rebase_content == NULL)
4289 return FALSE;
4290 }
4291
4292 /* Read bind content. */
4293 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4294 {
4295 cmd->bind_content =
4296 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4297 if (cmd->bind_content == NULL)
4298 return FALSE;
4299 }
4300
4301 /* Read weak bind content. */
4302 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4303 {
4304 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4305 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4306 if (cmd->weak_bind_content == NULL)
4307 return FALSE;
4308 }
4309
4310 /* Read lazy bind content. */
4311 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4312 {
4313 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4314 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4315 if (cmd->lazy_bind_content == NULL)
4316 return FALSE;
4317 }
4318
4319 /* Read export content. */
4320 if (cmd->export_content == NULL && cmd->export_size != 0)
4321 {
4322 cmd->export_content = bfd_mach_o_alloc_and_read
4323 (abfd, cmd->export_off, cmd->export_size);
4324 if (cmd->export_content == NULL)
4325 return FALSE;
4326 }
4327
4328 return TRUE;
4329 }
4330
4331 static bfd_boolean
4332 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4333 {
4334 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4335 struct mach_o_dyld_info_command_external raw;
4336
4337 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4338 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4339 return FALSE;
4340
4341 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4342 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4343 cmd->rebase_content = NULL;
4344 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4345 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4346 cmd->bind_content = NULL;
4347 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4348 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4349 cmd->weak_bind_content = NULL;
4350 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4351 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4352 cmd->lazy_bind_content = NULL;
4353 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4354 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4355 cmd->export_content = NULL;
4356 return TRUE;
4357 }
4358
4359 static bfd_boolean
4360 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4361 {
4362 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4363 struct mach_o_version_min_command_external raw;
4364 unsigned int ver;
4365
4366 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4367 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4368 return FALSE;
4369
4370 ver = bfd_get_32 (abfd, raw.version);
4371 cmd->rel = ver >> 16;
4372 cmd->maj = ver >> 8;
4373 cmd->min = ver;
4374 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4375 return TRUE;
4376 }
4377
4378 static bfd_boolean
4379 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4380 {
4381 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4382 struct mach_o_encryption_info_command_external raw;
4383
4384 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4385 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4386 return FALSE;
4387
4388 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4389 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4390 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4391 return TRUE;
4392 }
4393
4394 static bfd_boolean
4395 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4396 {
4397 bfd_mach_o_main_command *cmd = &command->command.main;
4398 struct mach_o_entry_point_command_external raw;
4399
4400 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4401 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4402 return FALSE;
4403
4404 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4405 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4406 return TRUE;
4407 }
4408
4409 static bfd_boolean
4410 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4411 {
4412 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4413 struct mach_o_source_version_command_external raw;
4414 bfd_uint64_t ver;
4415
4416 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4417 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4418 return FALSE;
4419
4420 ver = bfd_get_64 (abfd, raw.version);
4421 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4422 generates warnings) in case of the host doesn't support 64 bit
4423 integers. */
4424 cmd->e = ver & 0x3ff;
4425 ver >>= 10;
4426 cmd->d = ver & 0x3ff;
4427 ver >>= 10;
4428 cmd->c = ver & 0x3ff;
4429 ver >>= 10;
4430 cmd->b = ver & 0x3ff;
4431 ver >>= 10;
4432 cmd->a = ver & 0xffffff;
4433 return TRUE;
4434 }
4435
4436 static bfd_boolean
4437 bfd_mach_o_read_segment (bfd *abfd,
4438 bfd_mach_o_load_command *command,
4439 unsigned int wide)
4440 {
4441 bfd_mach_o_segment_command *seg = &command->command.segment;
4442 unsigned long i;
4443
4444 if (wide)
4445 {
4446 struct mach_o_segment_command_64_external raw;
4447
4448 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4449
4450 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4451 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4452 return FALSE;
4453
4454 memcpy (seg->segname, raw.segname, 16);
4455 seg->segname[16] = '\0';
4456
4457 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4458 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4459 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4460 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4461 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4462 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4463 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4464 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4465 }
4466 else
4467 {
4468 struct mach_o_segment_command_32_external raw;
4469
4470 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4471
4472 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
4473 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4474 return FALSE;
4475
4476 memcpy (seg->segname, raw.segname, 16);
4477 seg->segname[16] = '\0';
4478
4479 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4480 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4481 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4482 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4483 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4484 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4485 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4486 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4487 }
4488 seg->sect_head = NULL;
4489 seg->sect_tail = NULL;
4490
4491 for (i = 0; i < seg->nsects; i++)
4492 {
4493 bfd_vma segoff;
4494 asection *sec;
4495
4496 if (wide)
4497 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
4498 + (i * BFD_MACH_O_SECTION_64_SIZE);
4499 else
4500 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
4501 + (i * BFD_MACH_O_SECTION_SIZE);
4502
4503 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
4504 if (sec == NULL)
4505 return FALSE;
4506
4507 bfd_mach_o_append_section_to_segment
4508 (seg, bfd_mach_o_get_mach_o_section (sec));
4509 }
4510
4511 return TRUE;
4512 }
4513
4514 static bfd_boolean
4515 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4516 {
4517 return bfd_mach_o_read_segment (abfd, command, 0);
4518 }
4519
4520 static bfd_boolean
4521 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4522 {
4523 return bfd_mach_o_read_segment (abfd, command, 1);
4524 }
4525
4526 static bfd_boolean
4527 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4528 {
4529 struct mach_o_load_command_external raw;
4530 unsigned int cmd;
4531
4532 /* Read command type and length. */
4533 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
4534 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4535 return FALSE;
4536
4537 cmd = bfd_h_get_32 (abfd, raw.cmd);
4538 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4539 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4540 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4541
4542 switch (command->type)
4543 {
4544 case BFD_MACH_O_LC_SEGMENT:
4545 if (!bfd_mach_o_read_segment_32 (abfd, command))
4546 return FALSE;
4547 break;
4548 case BFD_MACH_O_LC_SEGMENT_64:
4549 if (!bfd_mach_o_read_segment_64 (abfd, command))
4550 return FALSE;
4551 break;
4552 case BFD_MACH_O_LC_SYMTAB:
4553 if (!bfd_mach_o_read_symtab (abfd, command))
4554 return FALSE;
4555 break;
4556 case BFD_MACH_O_LC_SYMSEG:
4557 break;
4558 case BFD_MACH_O_LC_THREAD:
4559 case BFD_MACH_O_LC_UNIXTHREAD:
4560 if (!bfd_mach_o_read_thread (abfd, command))
4561 return FALSE;
4562 break;
4563 case BFD_MACH_O_LC_LOAD_DYLINKER:
4564 case BFD_MACH_O_LC_ID_DYLINKER:
4565 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4566 if (!bfd_mach_o_read_dylinker (abfd, command))
4567 return FALSE;
4568 break;
4569 case BFD_MACH_O_LC_LOAD_DYLIB:
4570 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4571 case BFD_MACH_O_LC_ID_DYLIB:
4572 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4573 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4574 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4575 if (!bfd_mach_o_read_dylib (abfd, command))
4576 return FALSE;
4577 break;
4578 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4579 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4580 return FALSE;
4581 break;
4582 case BFD_MACH_O_LC_LOADFVMLIB:
4583 case BFD_MACH_O_LC_IDFVMLIB:
4584 if (!bfd_mach_o_read_fvmlib (abfd, command))
4585 return FALSE;
4586 break;
4587 case BFD_MACH_O_LC_IDENT:
4588 case BFD_MACH_O_LC_FVMFILE:
4589 case BFD_MACH_O_LC_PREPAGE:
4590 case BFD_MACH_O_LC_ROUTINES:
4591 case BFD_MACH_O_LC_ROUTINES_64:
4592 break;
4593 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4594 case BFD_MACH_O_LC_SUB_UMBRELLA:
4595 case BFD_MACH_O_LC_SUB_LIBRARY:
4596 case BFD_MACH_O_LC_SUB_CLIENT:
4597 case BFD_MACH_O_LC_RPATH:
4598 if (!bfd_mach_o_read_str (abfd, command))
4599 return FALSE;
4600 break;
4601 case BFD_MACH_O_LC_DYSYMTAB:
4602 if (!bfd_mach_o_read_dysymtab (abfd, command))
4603 return FALSE;
4604 break;
4605 case BFD_MACH_O_LC_PREBIND_CKSUM:
4606 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4607 return FALSE;
4608 break;
4609 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4610 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4611 return FALSE;
4612 break;
4613 case BFD_MACH_O_LC_UUID:
4614 if (!bfd_mach_o_read_uuid (abfd, command))
4615 return FALSE;
4616 break;
4617 case BFD_MACH_O_LC_CODE_SIGNATURE:
4618 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4619 case BFD_MACH_O_LC_FUNCTION_STARTS:
4620 case BFD_MACH_O_LC_DATA_IN_CODE:
4621 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4622 if (!bfd_mach_o_read_linkedit (abfd, command))
4623 return FALSE;
4624 break;
4625 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4626 if (!bfd_mach_o_read_encryption_info (abfd, command))
4627 return FALSE;
4628 break;
4629 case BFD_MACH_O_LC_DYLD_INFO:
4630 if (!bfd_mach_o_read_dyld_info (abfd, command))
4631 return FALSE;
4632 break;
4633 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4634 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4635 if (!bfd_mach_o_read_version_min (abfd, command))
4636 return FALSE;
4637 break;
4638 case BFD_MACH_O_LC_MAIN:
4639 if (!bfd_mach_o_read_main (abfd, command))
4640 return FALSE;
4641 break;
4642 case BFD_MACH_O_LC_SOURCE_VERSION:
4643 if (!bfd_mach_o_read_source_version (abfd, command))
4644 return FALSE;
4645 break;
4646 default:
4647 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
4648 abfd, (unsigned long) command->type);
4649 break;
4650 }
4651
4652 return TRUE;
4653 }
4654
4655 static void
4656 bfd_mach_o_flatten_sections (bfd *abfd)
4657 {
4658 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4659 bfd_mach_o_load_command *cmd;
4660 long csect = 0;
4661
4662 /* Count total number of sections. */
4663 mdata->nsects = 0;
4664
4665 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4666 {
4667 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4668 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4669 {
4670 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4671
4672 mdata->nsects += seg->nsects;
4673 }
4674 }
4675
4676 /* Allocate sections array. */
4677 mdata->sections = bfd_alloc (abfd,
4678 mdata->nsects * sizeof (bfd_mach_o_section *));
4679
4680 /* Fill the array. */
4681 csect = 0;
4682
4683 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4684 {
4685 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4686 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4687 {
4688 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4689 bfd_mach_o_section *sec;
4690
4691 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4692
4693 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4694 mdata->sections[csect++] = sec;
4695 }
4696 }
4697 }
4698
4699 static bfd_boolean
4700 bfd_mach_o_scan_start_address (bfd *abfd)
4701 {
4702 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4703 bfd_mach_o_thread_command *thr = NULL;
4704 bfd_mach_o_load_command *cmd;
4705 unsigned long i;
4706
4707 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4708 if (cmd->type == BFD_MACH_O_LC_THREAD
4709 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4710 {
4711 thr = &cmd->command.thread;
4712 break;
4713 }
4714 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4715 {
4716 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4717 bfd_mach_o_section *text_sect = mdata->sections[0];
4718
4719 if (text_sect)
4720 {
4721 abfd->start_address = main_cmd->entryoff
4722 + (text_sect->addr - text_sect->offset);
4723 return TRUE;
4724 }
4725 }
4726
4727 /* An object file has no start address, so do not fail if not found. */
4728 if (thr == NULL)
4729 return TRUE;
4730
4731 /* FIXME: create a subtarget hook ? */
4732 for (i = 0; i < thr->nflavours; i++)
4733 {
4734 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4735 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4736 {
4737 unsigned char buf[4];
4738
4739 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4740 || bfd_bread (buf, 4, abfd) != 4)
4741 return FALSE;
4742
4743 abfd->start_address = bfd_h_get_32 (abfd, buf);
4744 }
4745 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4746 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4747 {
4748 unsigned char buf[4];
4749
4750 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4751 || bfd_bread (buf, 4, abfd) != 4)
4752 return FALSE;
4753
4754 abfd->start_address = bfd_h_get_32 (abfd, buf);
4755 }
4756 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4757 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4758 {
4759 unsigned char buf[8];
4760
4761 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4762 || bfd_bread (buf, 8, abfd) != 8)
4763 return FALSE;
4764
4765 abfd->start_address = bfd_h_get_64 (abfd, buf);
4766 }
4767 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4768 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4769 {
4770 unsigned char buf[8];
4771
4772 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4773 || bfd_bread (buf, 8, abfd) != 8)
4774 return FALSE;
4775
4776 abfd->start_address = bfd_h_get_64 (abfd, buf);
4777 }
4778 }
4779
4780 return TRUE;
4781 }
4782
4783 bfd_boolean
4784 bfd_mach_o_set_arch_mach (bfd *abfd,
4785 enum bfd_architecture arch,
4786 unsigned long machine)
4787 {
4788 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4789
4790 /* If this isn't the right architecture for this backend, and this
4791 isn't the generic backend, fail. */
4792 if (arch != bed->arch
4793 && arch != bfd_arch_unknown
4794 && bed->arch != bfd_arch_unknown)
4795 return FALSE;
4796
4797 return bfd_default_set_arch_mach (abfd, arch, machine);
4798 }
4799
4800 static bfd_boolean
4801 bfd_mach_o_scan (bfd *abfd,
4802 bfd_mach_o_header *header,
4803 bfd_mach_o_data_struct *mdata)
4804 {
4805 unsigned int i;
4806 enum bfd_architecture cputype;
4807 unsigned long cpusubtype;
4808 unsigned int hdrsize;
4809
4810 hdrsize = mach_o_wide_p (header) ?
4811 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4812
4813 mdata->header = *header;
4814
4815 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4816 switch (header->filetype)
4817 {
4818 case BFD_MACH_O_MH_OBJECT:
4819 abfd->flags |= HAS_RELOC;
4820 break;
4821 case BFD_MACH_O_MH_EXECUTE:
4822 abfd->flags |= EXEC_P;
4823 break;
4824 case BFD_MACH_O_MH_DYLIB:
4825 case BFD_MACH_O_MH_BUNDLE:
4826 abfd->flags |= DYNAMIC;
4827 break;
4828 }
4829
4830 abfd->tdata.mach_o_data = mdata;
4831
4832 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4833 &cputype, &cpusubtype);
4834 if (cputype == bfd_arch_unknown)
4835 {
4836 (*_bfd_error_handler)
4837 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4838 header->cputype, header->cpusubtype);
4839 return FALSE;
4840 }
4841
4842 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4843
4844 if (header->ncmds != 0)
4845 {
4846 bfd_mach_o_load_command *cmd;
4847
4848 mdata->first_command = NULL;
4849 mdata->last_command = NULL;
4850 cmd = bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4851 if (cmd == NULL)
4852 return FALSE;
4853
4854 for (i = 0; i < header->ncmds; i++)
4855 {
4856 bfd_mach_o_load_command *cur = &cmd[i];
4857
4858 bfd_mach_o_append_command (abfd, cur);
4859
4860 if (i == 0)
4861 cur->offset = hdrsize;
4862 else
4863 {
4864 bfd_mach_o_load_command *prev = &cmd[i - 1];
4865 cur->offset = prev->offset + prev->len;
4866 }
4867
4868 if (!bfd_mach_o_read_command (abfd, cur))
4869 return FALSE;
4870 }
4871 }
4872
4873 /* Sections should be flatten before scanning start address. */
4874 bfd_mach_o_flatten_sections (abfd);
4875 if (!bfd_mach_o_scan_start_address (abfd))
4876 return FALSE;
4877
4878 return TRUE;
4879 }
4880
4881 bfd_boolean
4882 bfd_mach_o_mkobject_init (bfd *abfd)
4883 {
4884 bfd_mach_o_data_struct *mdata = NULL;
4885
4886 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4887 if (mdata == NULL)
4888 return FALSE;
4889 abfd->tdata.mach_o_data = mdata;
4890
4891 mdata->header.magic = 0;
4892 mdata->header.cputype = 0;
4893 mdata->header.cpusubtype = 0;
4894 mdata->header.filetype = 0;
4895 mdata->header.ncmds = 0;
4896 mdata->header.sizeofcmds = 0;
4897 mdata->header.flags = 0;
4898 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4899 mdata->first_command = NULL;
4900 mdata->last_command = NULL;
4901 mdata->nsects = 0;
4902 mdata->sections = NULL;
4903 mdata->dyn_reloc_cache = NULL;
4904
4905 return TRUE;
4906 }
4907
4908 static bfd_boolean
4909 bfd_mach_o_gen_mkobject (bfd *abfd)
4910 {
4911 bfd_mach_o_data_struct *mdata;
4912
4913 if (!bfd_mach_o_mkobject_init (abfd))
4914 return FALSE;
4915
4916 mdata = bfd_mach_o_get_data (abfd);
4917 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4918 mdata->header.cputype = 0;
4919 mdata->header.cpusubtype = 0;
4920 mdata->header.byteorder = abfd->xvec->byteorder;
4921 mdata->header.version = 1;
4922
4923 return TRUE;
4924 }
4925
4926 const bfd_target *
4927 bfd_mach_o_header_p (bfd *abfd,
4928 bfd_mach_o_filetype filetype,
4929 bfd_mach_o_cpu_type cputype)
4930 {
4931 bfd_mach_o_header header;
4932 bfd_mach_o_data_struct *mdata;
4933
4934 if (!bfd_mach_o_read_header (abfd, &header))
4935 goto wrong;
4936
4937 if (! (header.byteorder == BFD_ENDIAN_BIG
4938 || header.byteorder == BFD_ENDIAN_LITTLE))
4939 {
4940 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4941 (unsigned long) header.byteorder);
4942 goto wrong;
4943 }
4944
4945 if (! ((header.byteorder == BFD_ENDIAN_BIG
4946 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4947 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4948 || (header.byteorder == BFD_ENDIAN_LITTLE
4949 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4950 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4951 goto wrong;
4952
4953 /* Check cputype and filetype.
4954 In case of wildcard, do not accept magics that are handled by existing
4955 targets. */
4956 if (cputype)
4957 {
4958 if (header.cputype != cputype)
4959 goto wrong;
4960 }
4961 else
4962 {
4963 #ifndef BFD64
4964 /* Do not recognize 64 architectures if not configured for 64bit targets.
4965 This could happen only for generic targets. */
4966 if (mach_o_wide_p (&header))
4967 goto wrong;
4968 #endif
4969 }
4970
4971 if (filetype)
4972 {
4973 if (header.filetype != filetype)
4974 goto wrong;
4975 }
4976 else
4977 {
4978 switch (header.filetype)
4979 {
4980 case BFD_MACH_O_MH_CORE:
4981 /* Handled by core_p */
4982 goto wrong;
4983 default:
4984 break;
4985 }
4986 }
4987
4988 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
4989 if (mdata == NULL)
4990 goto fail;
4991
4992 if (!bfd_mach_o_scan (abfd, &header, mdata))
4993 goto wrong;
4994
4995 return abfd->xvec;
4996
4997 wrong:
4998 bfd_set_error (bfd_error_wrong_format);
4999
5000 fail:
5001 return NULL;
5002 }
5003
5004 static const bfd_target *
5005 bfd_mach_o_gen_object_p (bfd *abfd)
5006 {
5007 return bfd_mach_o_header_p (abfd, 0, 0);
5008 }
5009
5010 static const bfd_target *
5011 bfd_mach_o_gen_core_p (bfd *abfd)
5012 {
5013 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
5014 }
5015
5016 /* Return the base address of ABFD, ie the address at which the image is
5017 mapped. The possible initial pagezero is ignored. */
5018
5019 bfd_vma
5020 bfd_mach_o_get_base_address (bfd *abfd)
5021 {
5022 bfd_mach_o_data_struct *mdata;
5023 bfd_mach_o_load_command *cmd;
5024
5025 /* Check for Mach-O. */
5026 if (!bfd_mach_o_valid (abfd))
5027 return 0;
5028 mdata = bfd_mach_o_get_data (abfd);
5029
5030 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5031 {
5032 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5033 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5034 {
5035 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5036
5037 if (segcmd->initprot != 0)
5038 return segcmd->vmaddr;
5039 }
5040 }
5041 return 0;
5042 }
5043
5044 typedef struct mach_o_fat_archentry
5045 {
5046 unsigned long cputype;
5047 unsigned long cpusubtype;
5048 unsigned long offset;
5049 unsigned long size;
5050 unsigned long align;
5051 } mach_o_fat_archentry;
5052
5053 typedef struct mach_o_fat_data_struct
5054 {
5055 unsigned long magic;
5056 unsigned long nfat_arch;
5057 mach_o_fat_archentry *archentries;
5058 } mach_o_fat_data_struct;
5059
5060 const bfd_target *
5061 bfd_mach_o_archive_p (bfd *abfd)
5062 {
5063 mach_o_fat_data_struct *adata = NULL;
5064 struct mach_o_fat_header_external hdr;
5065 unsigned long i;
5066
5067 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5068 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5069 goto error;
5070
5071 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5072 if (adata == NULL)
5073 goto error;
5074
5075 adata->magic = bfd_getb32 (hdr.magic);
5076 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5077 if (adata->magic != 0xcafebabe)
5078 goto error;
5079 /* Avoid matching Java bytecode files, which have the same magic number.
5080 In the Java bytecode file format this field contains the JVM version,
5081 which starts at 43.0. */
5082 if (adata->nfat_arch > 30)
5083 goto error;
5084
5085 adata->archentries =
5086 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
5087 if (adata->archentries == NULL)
5088 goto error;
5089
5090 for (i = 0; i < adata->nfat_arch; i++)
5091 {
5092 struct mach_o_fat_arch_external arch;
5093 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5094 goto error;
5095 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5096 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5097 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5098 adata->archentries[i].size = bfd_getb32 (arch.size);
5099 adata->archentries[i].align = bfd_getb32 (arch.align);
5100 }
5101
5102 abfd->tdata.mach_o_fat_data = adata;
5103 return abfd->xvec;
5104
5105 error:
5106 if (adata != NULL)
5107 bfd_release (abfd, adata);
5108 bfd_set_error (bfd_error_wrong_format);
5109 return NULL;
5110 }
5111
5112 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5113 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5114 Set arelt_data and origin fields too. */
5115
5116 static void
5117 bfd_mach_o_fat_member_init (bfd *abfd,
5118 enum bfd_architecture arch_type,
5119 unsigned long arch_subtype,
5120 mach_o_fat_archentry *entry)
5121 {
5122 struct areltdata *areltdata;
5123 /* Create the member filename. Use ARCH_NAME. */
5124 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5125
5126 if (ap)
5127 {
5128 /* Use the architecture name if known. */
5129 abfd->filename = xstrdup (ap->printable_name);
5130 }
5131 else
5132 {
5133 /* Forge a uniq id. */
5134 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5135 char *name = xmalloc (namelen);
5136 snprintf (name, namelen, "0x%lx-0x%lx",
5137 entry->cputype, entry->cpusubtype);
5138 abfd->filename = name;
5139 }
5140
5141 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5142 areltdata->parsed_size = entry->size;
5143 abfd->arelt_data = areltdata;
5144 abfd->iostream = NULL;
5145 abfd->origin = entry->offset;
5146 }
5147
5148 bfd *
5149 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
5150 {
5151 mach_o_fat_data_struct *adata;
5152 mach_o_fat_archentry *entry = NULL;
5153 unsigned long i;
5154 bfd *nbfd;
5155 enum bfd_architecture arch_type;
5156 unsigned long arch_subtype;
5157
5158 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5159 BFD_ASSERT (adata != NULL);
5160
5161 /* Find index of previous entry. */
5162 if (prev == NULL)
5163 {
5164 /* Start at first one. */
5165 i = 0;
5166 }
5167 else
5168 {
5169 /* Find index of PREV. */
5170 for (i = 0; i < adata->nfat_arch; i++)
5171 {
5172 if (adata->archentries[i].offset == prev->origin)
5173 break;
5174 }
5175
5176 if (i == adata->nfat_arch)
5177 {
5178 /* Not found. */
5179 bfd_set_error (bfd_error_bad_value);
5180 return NULL;
5181 }
5182
5183 /* Get next entry. */
5184 i++;
5185 }
5186
5187 if (i >= adata->nfat_arch)
5188 {
5189 bfd_set_error (bfd_error_no_more_archived_files);
5190 return NULL;
5191 }
5192
5193 entry = &adata->archentries[i];
5194 nbfd = _bfd_new_bfd_contained_in (archive);
5195 if (nbfd == NULL)
5196 return NULL;
5197
5198 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5199 &arch_type, &arch_subtype);
5200
5201 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5202
5203 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5204
5205 return nbfd;
5206 }
5207
5208 /* Analogous to stat call. */
5209
5210 static int
5211 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5212 {
5213 if (abfd->arelt_data == NULL)
5214 {
5215 bfd_set_error (bfd_error_invalid_operation);
5216 return -1;
5217 }
5218
5219 buf->st_mtime = 0;
5220 buf->st_uid = 0;
5221 buf->st_gid = 0;
5222 buf->st_mode = 0644;
5223 buf->st_size = arelt_size (abfd);
5224
5225 return 0;
5226 }
5227
5228 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5229 If ABFD is a fat image containing a member that corresponds to FORMAT
5230 and ARCH, returns it.
5231 In other case, returns NULL.
5232 This function allows transparent uses of fat images. */
5233
5234 bfd *
5235 bfd_mach_o_fat_extract (bfd *abfd,
5236 bfd_format format,
5237 const bfd_arch_info_type *arch)
5238 {
5239 bfd *res;
5240 mach_o_fat_data_struct *adata;
5241 unsigned int i;
5242
5243 if (bfd_check_format (abfd, format))
5244 {
5245 if (bfd_get_arch_info (abfd) == arch)
5246 return abfd;
5247 return NULL;
5248 }
5249 if (!bfd_check_format (abfd, bfd_archive)
5250 || abfd->xvec != &mach_o_fat_vec)
5251 return NULL;
5252
5253 /* This is a Mach-O fat image. */
5254 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5255 BFD_ASSERT (adata != NULL);
5256
5257 for (i = 0; i < adata->nfat_arch; i++)
5258 {
5259 struct mach_o_fat_archentry *e = &adata->archentries[i];
5260 enum bfd_architecture cpu_type;
5261 unsigned long cpu_subtype;
5262
5263 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5264 &cpu_type, &cpu_subtype);
5265 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5266 continue;
5267
5268 /* The architecture is found. */
5269 res = _bfd_new_bfd_contained_in (abfd);
5270 if (res == NULL)
5271 return NULL;
5272
5273 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5274
5275 if (bfd_check_format (res, format))
5276 {
5277 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5278 return res;
5279 }
5280 bfd_close (res);
5281 return NULL;
5282 }
5283
5284 return NULL;
5285 }
5286
5287 int
5288 bfd_mach_o_lookup_command (bfd *abfd,
5289 bfd_mach_o_load_command_type type,
5290 bfd_mach_o_load_command **mcommand)
5291 {
5292 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5293 struct bfd_mach_o_load_command *cmd;
5294 unsigned int num;
5295
5296 BFD_ASSERT (mdata != NULL);
5297 BFD_ASSERT (mcommand != NULL);
5298
5299 num = 0;
5300 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5301 {
5302 if (cmd->type != type)
5303 continue;
5304
5305 if (num == 0)
5306 *mcommand = cmd;
5307 num++;
5308 }
5309
5310 return num;
5311 }
5312
5313 unsigned long
5314 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5315 {
5316 switch (type)
5317 {
5318 case BFD_MACH_O_CPU_TYPE_MC680x0:
5319 return 0x04000000;
5320 case BFD_MACH_O_CPU_TYPE_MC88000:
5321 return 0xffffe000;
5322 case BFD_MACH_O_CPU_TYPE_POWERPC:
5323 return 0xc0000000;
5324 case BFD_MACH_O_CPU_TYPE_I386:
5325 return 0xc0000000;
5326 case BFD_MACH_O_CPU_TYPE_SPARC:
5327 return 0xf0000000;
5328 case BFD_MACH_O_CPU_TYPE_I860:
5329 return 0;
5330 case BFD_MACH_O_CPU_TYPE_HPPA:
5331 return 0xc0000000 - 0x04000000;
5332 default:
5333 return 0;
5334 }
5335 }
5336
5337 /* The following two tables should be kept, as far as possible, in order of
5338 most frequently used entries to optimize their use from gas. */
5339
5340 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5341 {
5342 { "regular", BFD_MACH_O_S_REGULAR},
5343 { "coalesced", BFD_MACH_O_S_COALESCED},
5344 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5345 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5346 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5347 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5348 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5349 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5350 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5351 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5352 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5353 { "interposing", BFD_MACH_O_S_INTERPOSING},
5354 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5355 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5356 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5357 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5358 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5359 { NULL, 0}
5360 };
5361
5362 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5363 {
5364 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5365 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5366 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5367 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5368 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5369 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5370 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5371 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5372 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5373 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5374 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5375 { NULL, 0}
5376 };
5377
5378 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5379
5380 unsigned int
5381 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5382 {
5383 const bfd_mach_o_xlat_name *x;
5384 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5385
5386 for (x = bfd_mach_o_section_type_name; x->name; x++)
5387 if (strcmp (x->name, name) == 0)
5388 {
5389 /* We found it... does the target support it? */
5390 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5391 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5392 return x->val; /* OK. */
5393 else
5394 break; /* Not supported. */
5395 }
5396 /* Maximum section ID = 0xff. */
5397 return 256;
5398 }
5399
5400 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5401
5402 unsigned int
5403 bfd_mach_o_get_section_attribute_from_name (const char *name)
5404 {
5405 const bfd_mach_o_xlat_name *x;
5406
5407 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5408 if (strcmp (x->name, name) == 0)
5409 return x->val;
5410 return (unsigned int)-1;
5411 }
5412
5413 int
5414 bfd_mach_o_core_fetch_environment (bfd *abfd,
5415 unsigned char **rbuf,
5416 unsigned int *rlen)
5417 {
5418 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5419 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5420 bfd_mach_o_load_command *cmd;
5421
5422 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5423 {
5424 bfd_mach_o_segment_command *seg;
5425
5426 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5427 continue;
5428
5429 seg = &cmd->command.segment;
5430
5431 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5432 {
5433 unsigned long start = seg->fileoff;
5434 unsigned long end = seg->fileoff + seg->filesize;
5435 unsigned char *buf = bfd_malloc (1024);
5436 unsigned long size = 1024;
5437
5438 for (;;)
5439 {
5440 bfd_size_type nread = 0;
5441 unsigned long offset;
5442 int found_nonnull = 0;
5443
5444 if (size > (end - start))
5445 size = (end - start);
5446
5447 buf = bfd_realloc_or_free (buf, size);
5448 if (buf == NULL)
5449 return -1;
5450
5451 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5452 {
5453 free (buf);
5454 return -1;
5455 }
5456
5457 nread = bfd_bread (buf, size, abfd);
5458
5459 if (nread != size)
5460 {
5461 free (buf);
5462 return -1;
5463 }
5464
5465 for (offset = 4; offset <= size; offset += 4)
5466 {
5467 unsigned long val;
5468
5469 val = *((unsigned long *) (buf + size - offset));
5470 if (! found_nonnull)
5471 {
5472 if (val != 0)
5473 found_nonnull = 1;
5474 }
5475 else if (val == 0x0)
5476 {
5477 unsigned long bottom;
5478 unsigned long top;
5479
5480 bottom = seg->fileoff + seg->filesize - offset;
5481 top = seg->fileoff + seg->filesize - 4;
5482 *rbuf = bfd_malloc (top - bottom);
5483 *rlen = top - bottom;
5484
5485 memcpy (*rbuf, buf + size - *rlen, *rlen);
5486 free (buf);
5487 return 0;
5488 }
5489 }
5490
5491 if (size == (end - start))
5492 break;
5493
5494 size *= 2;
5495 }
5496
5497 free (buf);
5498 }
5499 }
5500
5501 return -1;
5502 }
5503
5504 char *
5505 bfd_mach_o_core_file_failing_command (bfd *abfd)
5506 {
5507 unsigned char *buf = NULL;
5508 unsigned int len = 0;
5509 int ret;
5510
5511 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5512 if (ret < 0)
5513 return NULL;
5514
5515 return (char *) buf;
5516 }
5517
5518 int
5519 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5520 {
5521 return 0;
5522 }
5523
5524 static bfd_mach_o_uuid_command *
5525 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5526 {
5527 bfd_mach_o_load_command *uuid_cmd;
5528 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5529 if (ncmd != 1)
5530 return FALSE;
5531 return &uuid_cmd->command.uuid;
5532 }
5533
5534 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5535
5536 static bfd_boolean
5537 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5538 {
5539 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5540
5541 BFD_ASSERT (abfd);
5542 BFD_ASSERT (uuid_cmd);
5543
5544 if (!bfd_check_format (abfd, bfd_object))
5545 return FALSE;
5546
5547 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5548 || bfd_mach_o_get_data (abfd) == NULL
5549 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5550 return FALSE;
5551
5552 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5553 if (dsym_uuid_cmd == NULL)
5554 return FALSE;
5555
5556 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5557 sizeof (uuid_cmd->uuid)) != 0)
5558 return FALSE;
5559
5560 return TRUE;
5561 }
5562
5563 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5564 The caller is responsible for closing the returned BFD object and
5565 its my_archive if the returned BFD is in a fat dSYM. */
5566
5567 static bfd *
5568 bfd_mach_o_find_dsym (const char *dsym_filename,
5569 const bfd_mach_o_uuid_command *uuid_cmd,
5570 const bfd_arch_info_type *arch)
5571 {
5572 bfd *base_dsym_bfd, *dsym_bfd;
5573
5574 BFD_ASSERT (uuid_cmd);
5575
5576 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5577 if (base_dsym_bfd == NULL)
5578 return NULL;
5579
5580 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5581 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5582 return dsym_bfd;
5583
5584 bfd_close (dsym_bfd);
5585 if (base_dsym_bfd != dsym_bfd)
5586 bfd_close (base_dsym_bfd);
5587
5588 return NULL;
5589 }
5590
5591 /* Return a BFD created from a dSYM file for ABFD.
5592 The caller is responsible for closing the returned BFD object, its
5593 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5594
5595 static bfd *
5596 bfd_mach_o_follow_dsym (bfd *abfd)
5597 {
5598 char *dsym_filename;
5599 bfd_mach_o_uuid_command *uuid_cmd;
5600 bfd *dsym_bfd, *base_bfd = abfd;
5601 const char *base_basename;
5602
5603 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5604 return NULL;
5605
5606 if (abfd->my_archive)
5607 base_bfd = abfd->my_archive;
5608 /* BFD may have been opened from a stream. */
5609 if (base_bfd->filename == NULL)
5610 {
5611 bfd_set_error (bfd_error_invalid_operation);
5612 return NULL;
5613 }
5614 base_basename = lbasename (base_bfd->filename);
5615
5616 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5617 if (uuid_cmd == NULL)
5618 return NULL;
5619
5620 /* TODO: We assume the DWARF file has the same as the binary's.
5621 It seems apple's GDB checks all files in the dSYM bundle directory.
5622 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5623 */
5624 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5625 + strlen (dsym_subdir) + 1
5626 + strlen (base_basename) + 1);
5627 sprintf (dsym_filename, "%s%s/%s",
5628 base_bfd->filename, dsym_subdir, base_basename);
5629
5630 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5631 bfd_get_arch_info (abfd));
5632 if (dsym_bfd == NULL)
5633 free (dsym_filename);
5634
5635 return dsym_bfd;
5636 }
5637
5638 bfd_boolean
5639 bfd_mach_o_find_nearest_line (bfd *abfd,
5640 asymbol **symbols,
5641 asection *section,
5642 bfd_vma offset,
5643 const char **filename_ptr,
5644 const char **functionname_ptr,
5645 unsigned int *line_ptr,
5646 unsigned int *discriminator_ptr)
5647 {
5648 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5649 if (mdata == NULL)
5650 return FALSE;
5651 switch (mdata->header.filetype)
5652 {
5653 case BFD_MACH_O_MH_OBJECT:
5654 break;
5655 case BFD_MACH_O_MH_EXECUTE:
5656 case BFD_MACH_O_MH_DYLIB:
5657 case BFD_MACH_O_MH_BUNDLE:
5658 case BFD_MACH_O_MH_KEXT_BUNDLE:
5659 if (mdata->dwarf2_find_line_info == NULL)
5660 {
5661 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5662 /* When we couldn't find dSYM for this binary, we look for
5663 the debug information in the binary itself. In this way,
5664 we won't try finding separated dSYM again because
5665 mdata->dwarf2_find_line_info will be filled. */
5666 if (! mdata->dsym_bfd)
5667 break;
5668 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5669 dwarf_debug_sections, symbols,
5670 &mdata->dwarf2_find_line_info,
5671 FALSE))
5672 return FALSE;
5673 }
5674 break;
5675 default:
5676 return FALSE;
5677 }
5678 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5679 filename_ptr, functionname_ptr,
5680 line_ptr, discriminator_ptr,
5681 dwarf_debug_sections, 0,
5682 &mdata->dwarf2_find_line_info);
5683 }
5684
5685 bfd_boolean
5686 bfd_mach_o_close_and_cleanup (bfd *abfd)
5687 {
5688 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5689 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5690 {
5691 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5692 bfd_mach_o_free_cached_info (abfd);
5693 if (mdata->dsym_bfd != NULL)
5694 {
5695 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5696 char *dsym_filename = (char *)(fat_bfd
5697 ? fat_bfd->filename
5698 : mdata->dsym_bfd->filename);
5699 bfd_close (mdata->dsym_bfd);
5700 mdata->dsym_bfd = NULL;
5701 if (fat_bfd)
5702 bfd_close (fat_bfd);
5703 free (dsym_filename);
5704 }
5705 }
5706
5707 if (bfd_get_format (abfd) == bfd_archive
5708 && abfd->xvec == &mach_o_fat_vec)
5709 return TRUE;
5710 return _bfd_generic_close_and_cleanup (abfd);
5711 }
5712
5713 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5714 {
5715 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5716 asection *asect;
5717 free (mdata->dyn_reloc_cache);
5718 mdata->dyn_reloc_cache = NULL;
5719 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5720 {
5721 free (asect->relocation);
5722 asect->relocation = NULL;
5723 }
5724
5725 return TRUE;
5726 }
5727
5728 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5729 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5730
5731 #define bfd_mach_o_swap_reloc_in NULL
5732 #define bfd_mach_o_swap_reloc_out NULL
5733 #define bfd_mach_o_print_thread NULL
5734 #define bfd_mach_o_tgt_seg_table NULL
5735 #define bfd_mach_o_section_type_valid_for_tgt NULL
5736
5737 #define TARGET_NAME mach_o_be_vec
5738 #define TARGET_STRING "mach-o-be"
5739 #define TARGET_ARCHITECTURE bfd_arch_unknown
5740 #define TARGET_PAGESIZE 1
5741 #define TARGET_BIG_ENDIAN 1
5742 #define TARGET_ARCHIVE 0
5743 #define TARGET_PRIORITY 1
5744 #include "mach-o-target.c"
5745
5746 #undef TARGET_NAME
5747 #undef TARGET_STRING
5748 #undef TARGET_ARCHITECTURE
5749 #undef TARGET_PAGESIZE
5750 #undef TARGET_BIG_ENDIAN
5751 #undef TARGET_ARCHIVE
5752 #undef TARGET_PRIORITY
5753
5754 #define TARGET_NAME mach_o_le_vec
5755 #define TARGET_STRING "mach-o-le"
5756 #define TARGET_ARCHITECTURE bfd_arch_unknown
5757 #define TARGET_PAGESIZE 1
5758 #define TARGET_BIG_ENDIAN 0
5759 #define TARGET_ARCHIVE 0
5760 #define TARGET_PRIORITY 1
5761
5762 #include "mach-o-target.c"
5763
5764 #undef TARGET_NAME
5765 #undef TARGET_STRING
5766 #undef TARGET_ARCHITECTURE
5767 #undef TARGET_PAGESIZE
5768 #undef TARGET_BIG_ENDIAN
5769 #undef TARGET_ARCHIVE
5770 #undef TARGET_PRIORITY
5771
5772 /* Not yet handled: creating an archive. */
5773 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5774
5775 /* Not used. */
5776 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5777 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5778 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5779 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5780 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5781 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5782 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5783 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5784 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5785 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5786
5787 #define TARGET_NAME mach_o_fat_vec
5788 #define TARGET_STRING "mach-o-fat"
5789 #define TARGET_ARCHITECTURE bfd_arch_unknown
5790 #define TARGET_PAGESIZE 1
5791 #define TARGET_BIG_ENDIAN 1
5792 #define TARGET_ARCHIVE 1
5793 #define TARGET_PRIORITY 0
5794
5795 #include "mach-o-target.c"
5796
5797 #undef TARGET_NAME
5798 #undef TARGET_STRING
5799 #undef TARGET_ARCHITECTURE
5800 #undef TARGET_PAGESIZE
5801 #undef TARGET_BIG_ENDIAN
5802 #undef TARGET_ARCHIVE
5803 #undef TARGET_PRIORITY
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