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[thirdparty/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2018 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) -1U << (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 static const char *
596 cputype (unsigned long value)
597 {
598 switch (value)
599 {
600 case BFD_MACH_O_CPU_TYPE_VAX: return "VAX";
601 case BFD_MACH_O_CPU_TYPE_MC680x0: return "MC68k";
602 case BFD_MACH_O_CPU_TYPE_I386: return "I386";
603 case BFD_MACH_O_CPU_TYPE_MIPS: return "MIPS";
604 case BFD_MACH_O_CPU_TYPE_MC98000: return "MC98k";
605 case BFD_MACH_O_CPU_TYPE_HPPA: return "HPPA";
606 case BFD_MACH_O_CPU_TYPE_ARM: return "ARM";
607 case BFD_MACH_O_CPU_TYPE_MC88000: return "MC88K";
608 case BFD_MACH_O_CPU_TYPE_SPARC: return "SPARC";
609 case BFD_MACH_O_CPU_TYPE_I860: return "I860";
610 case BFD_MACH_O_CPU_TYPE_ALPHA: return "ALPHA";
611 case BFD_MACH_O_CPU_TYPE_POWERPC: return "PPC";
612 case BFD_MACH_O_CPU_TYPE_POWERPC_64: return "PPC64";
613 case BFD_MACH_O_CPU_TYPE_X86_64: return "X86_64";
614 case BFD_MACH_O_CPU_TYPE_ARM64: return "ARM64";
615 default: return _("<unknown>");
616 }
617 }
618
619 static const char *
620 cpusubtype (unsigned long cputype, unsigned long cpusubtype)
621 {
622 static char buffer[128];
623
624 buffer[0] = 0;
625 switch (cpusubtype & BFD_MACH_O_CPU_SUBTYPE_MASK)
626 {
627 case 0:
628 break;
629 case BFD_MACH_O_CPU_SUBTYPE_LIB64:
630 sprintf (buffer, " (LIB64)"); break;
631 default:
632 sprintf (buffer, _("<unknown mask flags>")); break;
633 }
634
635 cpusubtype &= ~ BFD_MACH_O_CPU_SUBTYPE_MASK;
636
637 switch (cputype)
638 {
639 case BFD_MACH_O_CPU_TYPE_X86_64:
640 case BFD_MACH_O_CPU_TYPE_I386:
641 switch (cpusubtype)
642 {
643 case BFD_MACH_O_CPU_SUBTYPE_X86_ALL:
644 return strcat (buffer, " (X86_ALL)");
645 default:
646 break;
647 }
648 break;
649
650 case BFD_MACH_O_CPU_TYPE_ARM:
651 switch (cpusubtype)
652 {
653 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
654 return strcat (buffer, " (ARM_ALL)");
655 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
656 return strcat (buffer, " (ARM_V4T)");
657 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
658 return strcat (buffer, " (ARM_V6)");
659 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
660 return strcat (buffer, " (ARM_V5TEJ)");
661 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
662 return strcat (buffer, " (ARM_XSCALE)");
663 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
664 return strcat (buffer, " (ARM_V7)");
665 default:
666 break;
667 }
668 break;
669
670 case BFD_MACH_O_CPU_TYPE_ARM64:
671 switch (cpusubtype)
672 {
673 case BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL:
674 return strcat (buffer, " (ARM64_ALL)");
675 case BFD_MACH_O_CPU_SUBTYPE_ARM64_V8:
676 return strcat (buffer, " (ARM64_V8)");
677 default:
678 break;
679 }
680 break;
681
682 default:
683 break;
684 }
685
686 if (cpusubtype != 0)
687 return strcat (buffer, _(" (<unknown>)"));
688
689 return buffer;
690 }
691
692 bfd_boolean
693 bfd_mach_o_bfd_print_private_bfd_data (bfd *abfd, void *ptr)
694 {
695 FILE * file = (FILE *) ptr;
696 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
697
698 fprintf (file, _(" MACH-O header:\n"));
699 fprintf (file, _(" magic: %#lx\n"), (long) mdata->header.magic);
700 fprintf (file, _(" cputype: %#lx (%s)\n"), (long) mdata->header.cputype,
701 cputype (mdata->header.cputype));
702 fprintf (file, _(" cpusubtype: %#lx%s\n"), (long) mdata->header.cpusubtype,
703 cpusubtype (mdata->header.cputype, mdata->header.cpusubtype));
704 fprintf (file, _(" filetype: %#lx\n"), (long) mdata->header.filetype);
705 fprintf (file, _(" ncmds: %#lx\n"), (long) mdata->header.ncmds);
706 fprintf (file, _(" sizeocmds: %#lx\n"), (long) mdata->header.sizeofcmds);
707 fprintf (file, _(" flags: %#lx\n"), (long) mdata->header.flags);
708 fprintf (file, _(" version: %x\n"), mdata->header.version);
709
710 return TRUE;
711 }
712
713 /* Copy any private info we understand from the input bfd
714 to the output bfd. */
715
716 bfd_boolean
717 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
718 {
719 bfd_mach_o_data_struct *imdata;
720 bfd_mach_o_data_struct *omdata;
721 bfd_mach_o_load_command *icmd;
722
723 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
724 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
725 return TRUE;
726
727 BFD_ASSERT (bfd_mach_o_valid (ibfd));
728 BFD_ASSERT (bfd_mach_o_valid (obfd));
729
730 imdata = bfd_mach_o_get_data (ibfd);
731 omdata = bfd_mach_o_get_data (obfd);
732
733 /* Copy header flags. */
734 omdata->header.flags = imdata->header.flags;
735
736 /* PR 23299. Copy the cputype. */
737 if (imdata->header.cputype != omdata->header.cputype)
738 {
739 if (omdata->header.cputype == 0)
740 omdata->header.cputype = imdata->header.cputype;
741 else if (imdata->header.cputype != 0)
742 /* Urg - what has happened ? */
743 _bfd_error_handler (_("incompatible cputypes in mach-o files: %ld vs %ld"),
744 (long) imdata->header.cputype,
745 (long) omdata->header.cputype);
746 }
747
748 /* Copy the cpusubtype. */
749 omdata->header.cpusubtype = imdata->header.cpusubtype;
750
751 /* Copy commands. */
752 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
753 {
754 bfd_mach_o_load_command *ocmd;
755
756 switch (icmd->type)
757 {
758 case BFD_MACH_O_LC_LOAD_DYLIB:
759 case BFD_MACH_O_LC_LOAD_DYLINKER:
760 case BFD_MACH_O_LC_DYLD_INFO:
761 /* Command is copied. */
762 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
763 if (ocmd == NULL)
764 return FALSE;
765
766 /* Copy common fields. */
767 ocmd->type = icmd->type;
768 ocmd->type_required = icmd->type_required;
769 ocmd->offset = 0;
770 ocmd->len = icmd->len;
771 break;
772
773 default:
774 /* Command is not copied. */
775 continue;
776 break;
777 }
778
779 switch (icmd->type)
780 {
781 case BFD_MACH_O_LC_LOAD_DYLIB:
782 {
783 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
784 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
785
786 ody->name_offset = idy->name_offset;
787 ody->timestamp = idy->timestamp;
788 ody->current_version = idy->current_version;
789 ody->compatibility_version = idy->compatibility_version;
790 ody->name_str = idy->name_str;
791 }
792 break;
793
794 case BFD_MACH_O_LC_LOAD_DYLINKER:
795 {
796 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
797 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
798
799 ody->name_offset = idy->name_offset;
800 ody->name_str = idy->name_str;
801 }
802 break;
803
804 case BFD_MACH_O_LC_DYLD_INFO:
805 {
806 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
807 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
808
809 if (bfd_mach_o_read_dyld_content (ibfd, idy))
810 {
811 ody->rebase_size = idy->rebase_size;
812 ody->rebase_content = idy->rebase_content;
813
814 ody->bind_size = idy->bind_size;
815 ody->bind_content = idy->bind_content;
816
817 ody->weak_bind_size = idy->weak_bind_size;
818 ody->weak_bind_content = idy->weak_bind_content;
819
820 ody->lazy_bind_size = idy->lazy_bind_size;
821 ody->lazy_bind_content = idy->lazy_bind_content;
822
823 ody->export_size = idy->export_size;
824 ody->export_content = idy->export_content;
825 }
826 /* PR 17512L: file: 730e492d. */
827 else
828 {
829 ody->rebase_size =
830 ody->bind_size =
831 ody->weak_bind_size =
832 ody->lazy_bind_size =
833 ody->export_size = 0;
834 ody->rebase_content =
835 ody->bind_content =
836 ody->weak_bind_content =
837 ody->lazy_bind_content =
838 ody->export_content = NULL;
839 }
840 }
841 break;
842
843 default:
844 /* That command should be handled. */
845 abort ();
846 }
847
848 /* Insert command. */
849 bfd_mach_o_append_command (obfd, ocmd);
850 }
851
852 return TRUE;
853 }
854
855 /* This allows us to set up to 32 bits of flags (unless we invent some
856 fiendish scheme to subdivide). For now, we'll just set the file flags
857 without error checking - just overwrite. */
858
859 bfd_boolean
860 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
861 {
862 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
863
864 if (!mdata)
865 return FALSE;
866
867 mdata->header.flags = flags;
868 return TRUE;
869 }
870
871 /* Count the total number of symbols. */
872
873 static long
874 bfd_mach_o_count_symbols (bfd *abfd)
875 {
876 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
877
878 if (mdata->symtab == NULL)
879 return 0;
880 return mdata->symtab->nsyms;
881 }
882
883 long
884 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
885 {
886 long nsyms = bfd_mach_o_count_symbols (abfd);
887
888 return ((nsyms + 1) * sizeof (asymbol *));
889 }
890
891 long
892 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
893 {
894 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
895 long nsyms = bfd_mach_o_count_symbols (abfd);
896 bfd_mach_o_symtab_command *sym = mdata->symtab;
897 unsigned long j;
898
899 if (nsyms < 0)
900 return nsyms;
901
902 if (nsyms == 0)
903 {
904 /* Do not try to read symbols if there are none. */
905 alocation[0] = NULL;
906 return 0;
907 }
908
909 if (!bfd_mach_o_read_symtab_symbols (abfd))
910 {
911 _bfd_error_handler
912 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
913 return 0;
914 }
915
916 BFD_ASSERT (sym->symbols != NULL);
917
918 for (j = 0; j < sym->nsyms; j++)
919 alocation[j] = &sym->symbols[j].symbol;
920
921 alocation[j] = NULL;
922
923 return nsyms;
924 }
925
926 /* Create synthetic symbols for indirect symbols. */
927
928 long
929 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
930 long symcount ATTRIBUTE_UNUSED,
931 asymbol **syms ATTRIBUTE_UNUSED,
932 long dynsymcount ATTRIBUTE_UNUSED,
933 asymbol **dynsyms ATTRIBUTE_UNUSED,
934 asymbol **ret)
935 {
936 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
937 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
938 bfd_mach_o_symtab_command *symtab = mdata->symtab;
939 asymbol *s;
940 char * s_start;
941 char * s_end;
942 unsigned long count, i, j, n;
943 size_t size;
944 char *names;
945 char *nul_name;
946 const char stub [] = "$stub";
947
948 *ret = NULL;
949
950 /* Stop now if no symbols or no indirect symbols. */
951 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
952 || symtab == NULL || symtab->symbols == NULL)
953 return 0;
954
955 /* We need to allocate a bfd symbol for every indirect symbol and to
956 allocate the memory for its name. */
957 count = dysymtab->nindirectsyms;
958 size = count * sizeof (asymbol) + 1;
959
960 for (j = 0; j < count; j++)
961 {
962 const char * strng;
963 unsigned int isym = dysymtab->indirect_syms[j];
964
965 /* Some indirect symbols are anonymous. */
966 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
967 /* PR 17512: file: f5b8eeba. */
968 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
969 }
970
971 s_start = bfd_malloc (size);
972 s = *ret = (asymbol *) s_start;
973 if (s == NULL)
974 return -1;
975 names = (char *) (s + count);
976 nul_name = names;
977 *names++ = 0;
978 s_end = s_start + size;
979
980 n = 0;
981 for (i = 0; i < mdata->nsects; i++)
982 {
983 bfd_mach_o_section *sec = mdata->sections[i];
984 unsigned int first, last;
985 bfd_vma addr;
986 bfd_vma entry_size;
987
988 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
989 {
990 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
991 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
992 case BFD_MACH_O_S_SYMBOL_STUBS:
993 /* Only these sections have indirect symbols. */
994 first = sec->reserved1;
995 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
996 addr = sec->addr;
997 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
998
999 /* PR 17512: file: 08e15eec. */
1000 if (first >= count || last >= count || first > last)
1001 goto fail;
1002
1003 for (j = first; j < last; j++)
1004 {
1005 unsigned int isym = dysymtab->indirect_syms[j];
1006
1007 /* PR 17512: file: 04d64d9b. */
1008 if (((char *) s) + sizeof (* s) > s_end)
1009 goto fail;
1010
1011 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
1012 s->section = sec->bfdsection;
1013 s->value = addr - sec->addr;
1014 s->udata.p = NULL;
1015
1016 if (isym < symtab->nsyms
1017 && symtab->symbols[isym].symbol.name)
1018 {
1019 const char *sym = symtab->symbols[isym].symbol.name;
1020 size_t len;
1021
1022 s->name = names;
1023 len = strlen (sym);
1024 /* PR 17512: file: 47dfd4d2. */
1025 if (names + len >= s_end)
1026 goto fail;
1027 memcpy (names, sym, len);
1028 names += len;
1029 /* PR 17512: file: 18f340a4. */
1030 if (names + sizeof (stub) >= s_end)
1031 goto fail;
1032 memcpy (names, stub, sizeof (stub));
1033 names += sizeof (stub);
1034 }
1035 else
1036 s->name = nul_name;
1037
1038 addr += entry_size;
1039 s++;
1040 n++;
1041 }
1042 break;
1043 default:
1044 break;
1045 }
1046 }
1047
1048 return n;
1049
1050 fail:
1051 free (s_start);
1052 * ret = NULL;
1053 return -1;
1054 }
1055
1056 void
1057 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
1058 asymbol *symbol,
1059 symbol_info *ret)
1060 {
1061 bfd_symbol_info (symbol, ret);
1062 }
1063
1064 void
1065 bfd_mach_o_print_symbol (bfd *abfd,
1066 void * afile,
1067 asymbol *symbol,
1068 bfd_print_symbol_type how)
1069 {
1070 FILE *file = (FILE *) afile;
1071 const char *name;
1072 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
1073
1074 switch (how)
1075 {
1076 case bfd_print_symbol_name:
1077 fprintf (file, "%s", symbol->name);
1078 break;
1079 default:
1080 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
1081 if (asym->n_type & BFD_MACH_O_N_STAB)
1082 name = bfd_get_stab_name (asym->n_type);
1083 else
1084 switch (asym->n_type & BFD_MACH_O_N_TYPE)
1085 {
1086 case BFD_MACH_O_N_UNDF:
1087 if (symbol->value == 0)
1088 name = "UND";
1089 else
1090 name = "COM";
1091 break;
1092 case BFD_MACH_O_N_ABS:
1093 name = "ABS";
1094 break;
1095 case BFD_MACH_O_N_INDR:
1096 name = "INDR";
1097 break;
1098 case BFD_MACH_O_N_PBUD:
1099 name = "PBUD";
1100 break;
1101 case BFD_MACH_O_N_SECT:
1102 name = "SECT";
1103 break;
1104 default:
1105 name = "???";
1106 break;
1107 }
1108 if (name == NULL)
1109 name = "";
1110 fprintf (file, " %02x %-6s %02x %04x",
1111 asym->n_type, name, asym->n_sect, asym->n_desc);
1112 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
1113 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
1114 fprintf (file, " [%s]", symbol->section->name);
1115 fprintf (file, " %s", symbol->name);
1116 }
1117 }
1118
1119 static void
1120 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
1121 bfd_mach_o_cpu_subtype msubtype,
1122 enum bfd_architecture *type,
1123 unsigned long *subtype)
1124 {
1125 *subtype = bfd_arch_unknown;
1126
1127 switch (mtype)
1128 {
1129 case BFD_MACH_O_CPU_TYPE_VAX:
1130 *type = bfd_arch_vax;
1131 break;
1132 case BFD_MACH_O_CPU_TYPE_MC680x0:
1133 *type = bfd_arch_m68k;
1134 break;
1135 case BFD_MACH_O_CPU_TYPE_I386:
1136 *type = bfd_arch_i386;
1137 *subtype = bfd_mach_i386_i386;
1138 break;
1139 case BFD_MACH_O_CPU_TYPE_X86_64:
1140 *type = bfd_arch_i386;
1141 *subtype = bfd_mach_x86_64;
1142 break;
1143 case BFD_MACH_O_CPU_TYPE_MIPS:
1144 *type = bfd_arch_mips;
1145 break;
1146 case BFD_MACH_O_CPU_TYPE_MC98000:
1147 *type = bfd_arch_m98k;
1148 break;
1149 case BFD_MACH_O_CPU_TYPE_HPPA:
1150 *type = bfd_arch_hppa;
1151 break;
1152 case BFD_MACH_O_CPU_TYPE_ARM:
1153 *type = bfd_arch_arm;
1154 switch (msubtype)
1155 {
1156 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1157 *subtype = bfd_mach_arm_4T;
1158 break;
1159 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1160 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1161 break;
1162 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1163 *subtype = bfd_mach_arm_5TE;
1164 break;
1165 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1166 *subtype = bfd_mach_arm_XScale;
1167 break;
1168 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1169 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1170 break;
1171 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1172 default:
1173 break;
1174 }
1175 break;
1176 case BFD_MACH_O_CPU_TYPE_SPARC:
1177 *type = bfd_arch_sparc;
1178 *subtype = bfd_mach_sparc;
1179 break;
1180 case BFD_MACH_O_CPU_TYPE_ALPHA:
1181 *type = bfd_arch_alpha;
1182 break;
1183 case BFD_MACH_O_CPU_TYPE_POWERPC:
1184 *type = bfd_arch_powerpc;
1185 *subtype = bfd_mach_ppc;
1186 break;
1187 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1188 *type = bfd_arch_powerpc;
1189 *subtype = bfd_mach_ppc64;
1190 break;
1191 case BFD_MACH_O_CPU_TYPE_ARM64:
1192 *type = bfd_arch_aarch64;
1193 *subtype = bfd_mach_aarch64;
1194 break;
1195 default:
1196 *type = bfd_arch_unknown;
1197 break;
1198 }
1199 }
1200
1201 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1202 number of bytes written or -1 in case of error. */
1203
1204 static int
1205 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1206 {
1207 if (len % 4 != 0)
1208 {
1209 char pad[4] = {0,0,0,0};
1210 unsigned int padlen = 4 - (len % 4);
1211
1212 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1213 return -1;
1214
1215 return padlen;
1216 }
1217 else
1218 return 0;
1219 }
1220
1221 /* Likewise, but for a command. */
1222
1223 static int
1224 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1225 {
1226 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1227
1228 if (len % align != 0)
1229 {
1230 char pad[8] = {0};
1231 unsigned int padlen = align - (len % align);
1232
1233 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1234 return -1;
1235
1236 return padlen;
1237 }
1238 else
1239 return 0;
1240 }
1241
1242 static bfd_boolean
1243 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1244 {
1245 struct mach_o_header_external raw;
1246 unsigned int size;
1247
1248 size = mach_o_wide_p (header) ?
1249 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1250
1251 bfd_h_put_32 (abfd, header->magic, raw.magic);
1252 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1253 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1254 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1255 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1256 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1257 bfd_h_put_32 (abfd, header->flags, raw.flags);
1258
1259 if (mach_o_wide_p (header))
1260 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1261
1262 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1263 || bfd_bwrite (&raw, size, abfd) != size)
1264 return FALSE;
1265
1266 return TRUE;
1267 }
1268
1269 static bfd_boolean
1270 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1271 {
1272 bfd_mach_o_thread_command *cmd = &command->command.thread;
1273 unsigned int i;
1274 struct mach_o_thread_command_external raw;
1275 unsigned int offset;
1276
1277 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1278 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1279
1280 offset = BFD_MACH_O_LC_SIZE;
1281 for (i = 0; i < cmd->nflavours; i++)
1282 {
1283 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1284 BFD_ASSERT (cmd->flavours[i].offset ==
1285 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1286
1287 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1288 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1289
1290 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1291 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1292 return FALSE;
1293
1294 offset += cmd->flavours[i].size + sizeof (raw);
1295 }
1296
1297 return TRUE;
1298 }
1299
1300 static bfd_boolean
1301 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1302 {
1303 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1304 struct mach_o_str_command_external raw;
1305 unsigned int namelen;
1306
1307 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1308
1309 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1310 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1311 return FALSE;
1312
1313 namelen = strlen (cmd->name_str) + 1;
1314 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1315 return FALSE;
1316
1317 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1318 return FALSE;
1319
1320 return TRUE;
1321 }
1322
1323 static bfd_boolean
1324 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1325 {
1326 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1327 struct mach_o_dylib_command_external raw;
1328 unsigned int namelen;
1329
1330 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1331 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1332 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1333 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1334
1335 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1336 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1337 return FALSE;
1338
1339 namelen = strlen (cmd->name_str) + 1;
1340 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1341 return FALSE;
1342
1343 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1344 return FALSE;
1345
1346 return TRUE;
1347 }
1348
1349 static bfd_boolean
1350 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1351 {
1352 bfd_mach_o_main_command *cmd = &command->command.main;
1353 struct mach_o_entry_point_command_external raw;
1354
1355 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1356 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1357
1358 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1359 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1360 return FALSE;
1361
1362 return TRUE;
1363 }
1364
1365 static bfd_boolean
1366 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1367 {
1368 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1369 struct mach_o_dyld_info_command_external raw;
1370
1371 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1372 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1373 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1374 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1375 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1376 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1377 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1378 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1379 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1380 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1381
1382 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1383 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1384 return FALSE;
1385
1386 if (cmd->rebase_size != 0)
1387 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1388 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1389 cmd->rebase_size))
1390 return FALSE;
1391
1392 if (cmd->bind_size != 0)
1393 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1394 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1395 cmd->bind_size))
1396 return FALSE;
1397
1398 if (cmd->weak_bind_size != 0)
1399 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1400 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1401 cmd->weak_bind_size))
1402 return FALSE;
1403
1404 if (cmd->lazy_bind_size != 0)
1405 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1406 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1407 cmd->lazy_bind_size))
1408 return FALSE;
1409
1410 if (cmd->export_size != 0)
1411 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1412 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1413 cmd->export_size))
1414 return FALSE;
1415
1416 return TRUE;
1417 }
1418
1419 long
1420 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1421 asection *asect)
1422 {
1423 return (asect->reloc_count + 1) * sizeof (arelent *);
1424 }
1425
1426 /* In addition to the need to byte-swap the symbol number, the bit positions
1427 of the fields in the relocation information vary per target endian-ness. */
1428
1429 void
1430 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1431 unsigned char *fields)
1432 {
1433 unsigned char info = fields[3];
1434
1435 if (bfd_big_endian (abfd))
1436 {
1437 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1438 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1439 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1440 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1441 & BFD_MACH_O_LENGTH_MASK;
1442 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1443 }
1444 else
1445 {
1446 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1447 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1448 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1449 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1450 & BFD_MACH_O_LENGTH_MASK;
1451 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1452 }
1453 }
1454
1455 /* Set syms_ptr_ptr and addend of RES. */
1456
1457 bfd_boolean
1458 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1459 bfd_mach_o_reloc_info *reloc,
1460 arelent *res, asymbol **syms)
1461 {
1462 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1463 unsigned int num;
1464 asymbol **sym;
1465
1466 /* Non-scattered relocation. */
1467 reloc->r_scattered = 0;
1468 res->addend = 0;
1469
1470 num = reloc->r_value;
1471
1472 if (reloc->r_extern)
1473 {
1474 /* PR 17512: file: 8396-1185-0.004. */
1475 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1476 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1477 else if (syms == NULL)
1478 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1479 else
1480 /* An external symbol number. */
1481 sym = syms + num;
1482 }
1483 else if (num == 0x00ffffff || num == 0)
1484 {
1485 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1486 is generic code, we don't know wether this is really a PAIR.
1487 This value is almost certainly not a valid section number, hence
1488 this specific case to avoid an assertion failure.
1489 Target specific swap_reloc_in routine should adjust that. */
1490 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1491 }
1492 else
1493 {
1494 /* PR 17512: file: 006-2964-0.004. */
1495 if (num > mdata->nsects)
1496 return FALSE;
1497
1498 /* A section number. */
1499 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1500 /* For a symbol defined in section S, the addend (stored in the
1501 binary) contains the address of the section. To comply with
1502 bfd convention, subtract the section address.
1503 Use the address from the header, so that the user can modify
1504 the vma of the section. */
1505 res->addend = -mdata->sections[num - 1]->addr;
1506 }
1507
1508 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1509 in the lower 16bits of the address value. So we have to find the
1510 'symbol' from the preceding reloc. We do this even though the
1511 section symbol is probably not needed here, because NULL symbol
1512 values cause an assert in generic BFD code. This must be done in
1513 the PPC swap_reloc_in routine. */
1514 res->sym_ptr_ptr = sym;
1515
1516 return TRUE;
1517 }
1518
1519 /* Do most of the work for canonicalize_relocs on RAW: create internal
1520 representation RELOC and set most fields of RES using symbol table SYMS.
1521 Each target still has to set the howto of RES and possibly adjust other
1522 fields.
1523 Previously the Mach-O hook point was simply swap_in, but some targets
1524 (like arm64) don't follow the generic rules (symnum is a value for the
1525 non-scattered relocation ADDEND). */
1526
1527 bfd_boolean
1528 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1529 struct mach_o_reloc_info_external *raw,
1530 bfd_mach_o_reloc_info *reloc,
1531 arelent *res, asymbol **syms)
1532 {
1533 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1534 bfd_vma addr;
1535
1536 addr = bfd_get_32 (abfd, raw->r_address);
1537 res->sym_ptr_ptr = NULL;
1538 res->addend = 0;
1539
1540 if (addr & BFD_MACH_O_SR_SCATTERED)
1541 {
1542 unsigned int j;
1543 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1544
1545 /* Scattered relocation, can't be extern. */
1546 reloc->r_scattered = 1;
1547 reloc->r_extern = 0;
1548
1549 /* Extract section and offset from r_value (symnum). */
1550 reloc->r_value = symnum;
1551 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1552 end of the data for the section (e.g. in a calculation of section
1553 data length). At present, the symbol will end up associated with
1554 the following section or, if it falls within alignment padding, as
1555 null - which will assert later. */
1556 for (j = 0; j < mdata->nsects; j++)
1557 {
1558 bfd_mach_o_section *sect = mdata->sections[j];
1559 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1560 {
1561 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1562 res->addend = symnum - sect->addr;
1563 break;
1564 }
1565 }
1566
1567 /* Extract the info and address fields from r_address. */
1568 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1569 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1570 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1571 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1572 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1573 }
1574 else
1575 {
1576 /* Non-scattered relocation. */
1577 reloc->r_scattered = 0;
1578 reloc->r_address = addr;
1579 res->address = addr;
1580
1581 /* The value and info fields have to be extracted dependent on target
1582 endian-ness. */
1583 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1584
1585 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1586 res, syms))
1587 return FALSE;
1588 }
1589
1590 /* We have set up a reloc with all the information present, so the swapper
1591 can modify address, value and addend fields, if necessary, to convey
1592 information in the generic BFD reloc that is mach-o specific. */
1593
1594 return TRUE;
1595 }
1596
1597 static int
1598 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1599 unsigned long count,
1600 arelent *res, asymbol **syms)
1601 {
1602 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1603 unsigned long i;
1604 struct mach_o_reloc_info_external *native_relocs;
1605 bfd_size_type native_size;
1606
1607 /* Allocate and read relocs. */
1608 native_size = count * BFD_MACH_O_RELENT_SIZE;
1609
1610 /* PR 17512: file: 09477b57. */
1611 if (native_size < count)
1612 return -1;
1613
1614 native_relocs =
1615 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1616 if (native_relocs == NULL)
1617 return -1;
1618
1619 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1620 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1621 goto err;
1622
1623 for (i = 0; i < count; i++)
1624 {
1625 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1626 &res[i], syms, res))
1627 goto err;
1628 }
1629 free (native_relocs);
1630 return i;
1631 err:
1632 free (native_relocs);
1633 return -1;
1634 }
1635
1636 long
1637 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1638 arelent **rels, asymbol **syms)
1639 {
1640 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1641 unsigned long i;
1642 arelent *res;
1643
1644 if (asect->reloc_count == 0)
1645 return 0;
1646
1647 /* No need to go further if we don't know how to read relocs. */
1648 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1649 return 0;
1650
1651 if (asect->relocation == NULL)
1652 {
1653 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1654 return -1;
1655 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1656 if (res == NULL)
1657 return -1;
1658
1659 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1660 asect->reloc_count, res, syms) < 0)
1661 {
1662 free (res);
1663 return -1;
1664 }
1665 asect->relocation = res;
1666 }
1667
1668 res = asect->relocation;
1669 for (i = 0; i < asect->reloc_count; i++)
1670 rels[i] = &res[i];
1671 rels[i] = NULL;
1672
1673 return i;
1674 }
1675
1676 long
1677 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1678 {
1679 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1680
1681 if (mdata->dysymtab == NULL)
1682 return 1;
1683 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1684 * sizeof (arelent *);
1685 }
1686
1687 long
1688 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1689 struct bfd_symbol **syms)
1690 {
1691 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1692 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1693 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1694 unsigned long i;
1695 arelent *res;
1696
1697 if (dysymtab == NULL)
1698 return 0;
1699 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1700 return 0;
1701
1702 /* No need to go further if we don't know how to read relocs. */
1703 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1704 return 0;
1705
1706 if (mdata->dyn_reloc_cache == NULL)
1707 {
1708 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1709 < (dysymtab->nextrel + dysymtab->nlocrel))
1710 return -1;
1711
1712 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1713 * sizeof (arelent));
1714 if (res == NULL)
1715 return -1;
1716
1717 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1718 dysymtab->nextrel, res, syms) < 0)
1719 {
1720 free (res);
1721 return -1;
1722 }
1723
1724 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1725 dysymtab->nlocrel,
1726 res + dysymtab->nextrel, syms) < 0)
1727 {
1728 free (res);
1729 return -1;
1730 }
1731
1732 mdata->dyn_reloc_cache = res;
1733 }
1734
1735 res = mdata->dyn_reloc_cache;
1736 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1737 rels[i] = &res[i];
1738 rels[i] = NULL;
1739 return i;
1740 }
1741
1742 /* In addition to the need to byte-swap the symbol number, the bit positions
1743 of the fields in the relocation information vary per target endian-ness. */
1744
1745 static void
1746 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1747 bfd_mach_o_reloc_info *rel)
1748 {
1749 unsigned char info = 0;
1750
1751 BFD_ASSERT (rel->r_type <= 15);
1752 BFD_ASSERT (rel->r_length <= 3);
1753
1754 if (bfd_big_endian (abfd))
1755 {
1756 fields[0] = (rel->r_value >> 16) & 0xff;
1757 fields[1] = (rel->r_value >> 8) & 0xff;
1758 fields[2] = rel->r_value & 0xff;
1759 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1760 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1761 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1762 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1763 }
1764 else
1765 {
1766 fields[2] = (rel->r_value >> 16) & 0xff;
1767 fields[1] = (rel->r_value >> 8) & 0xff;
1768 fields[0] = rel->r_value & 0xff;
1769 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1770 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1771 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1772 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1773 }
1774 fields[3] = info;
1775 }
1776
1777 static bfd_boolean
1778 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1779 {
1780 unsigned int i;
1781 arelent **entries;
1782 asection *sec;
1783 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1784
1785 sec = section->bfdsection;
1786 if (sec->reloc_count == 0)
1787 return TRUE;
1788
1789 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1790 return TRUE;
1791
1792 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1793 return FALSE;
1794
1795 /* Convert and write. */
1796 entries = section->bfdsection->orelocation;
1797 for (i = 0; i < section->nreloc; i++)
1798 {
1799 arelent *rel = entries[i];
1800 struct mach_o_reloc_info_external raw;
1801 bfd_mach_o_reloc_info info, *pinfo = &info;
1802
1803 /* Convert relocation to an intermediate representation. */
1804 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1805 return FALSE;
1806
1807 /* Lower the relocation info. */
1808 if (pinfo->r_scattered)
1809 {
1810 unsigned long v;
1811
1812 v = BFD_MACH_O_SR_SCATTERED
1813 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1814 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1815 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1816 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1817 /* Note: scattered relocs have field in reverse order... */
1818 bfd_put_32 (abfd, v, raw.r_address);
1819 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1820 }
1821 else
1822 {
1823 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1824 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1825 pinfo);
1826 }
1827
1828 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1829 != BFD_MACH_O_RELENT_SIZE)
1830 return FALSE;
1831 }
1832 return TRUE;
1833 }
1834
1835 static bfd_boolean
1836 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1837 {
1838 struct mach_o_section_32_external raw;
1839
1840 memcpy (raw.sectname, section->sectname, 16);
1841 memcpy (raw.segname, section->segname, 16);
1842 bfd_h_put_32 (abfd, section->addr, raw.addr);
1843 bfd_h_put_32 (abfd, section->size, raw.size);
1844 bfd_h_put_32 (abfd, section->offset, raw.offset);
1845 bfd_h_put_32 (abfd, section->align, raw.align);
1846 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1847 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1848 bfd_h_put_32 (abfd, section->flags, raw.flags);
1849 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1850 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1851
1852 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1853 != BFD_MACH_O_SECTION_SIZE)
1854 return FALSE;
1855
1856 return TRUE;
1857 }
1858
1859 static bfd_boolean
1860 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1861 {
1862 struct mach_o_section_64_external raw;
1863
1864 memcpy (raw.sectname, section->sectname, 16);
1865 memcpy (raw.segname, section->segname, 16);
1866 bfd_h_put_64 (abfd, section->addr, raw.addr);
1867 bfd_h_put_64 (abfd, section->size, raw.size);
1868 bfd_h_put_32 (abfd, section->offset, raw.offset);
1869 bfd_h_put_32 (abfd, section->align, raw.align);
1870 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1871 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1872 bfd_h_put_32 (abfd, section->flags, raw.flags);
1873 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1874 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1875 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1876
1877 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1878 != BFD_MACH_O_SECTION_64_SIZE)
1879 return FALSE;
1880
1881 return TRUE;
1882 }
1883
1884 static bfd_boolean
1885 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1886 {
1887 struct mach_o_segment_command_32_external raw;
1888 bfd_mach_o_segment_command *seg = &command->command.segment;
1889 bfd_mach_o_section *sec;
1890
1891 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1892
1893 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1894 if (!bfd_mach_o_write_relocs (abfd, sec))
1895 return FALSE;
1896
1897 memcpy (raw.segname, seg->segname, 16);
1898 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1899 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1900 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1901 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1902 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1903 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1904 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1905 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1906
1907 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1908 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1909 return FALSE;
1910
1911 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1912 if (!bfd_mach_o_write_section_32 (abfd, sec))
1913 return FALSE;
1914
1915 return TRUE;
1916 }
1917
1918 static bfd_boolean
1919 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1920 {
1921 struct mach_o_segment_command_64_external raw;
1922 bfd_mach_o_segment_command *seg = &command->command.segment;
1923 bfd_mach_o_section *sec;
1924
1925 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1926
1927 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1928 if (!bfd_mach_o_write_relocs (abfd, sec))
1929 return FALSE;
1930
1931 memcpy (raw.segname, seg->segname, 16);
1932 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1933 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1934 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1935 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1936 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1937 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1938 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1939 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1940
1941 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1942 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1943 return FALSE;
1944
1945 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1946 if (!bfd_mach_o_write_section_64 (abfd, sec))
1947 return FALSE;
1948
1949 return TRUE;
1950 }
1951
1952 static bfd_boolean
1953 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1954 {
1955 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1956 unsigned long i;
1957 unsigned int wide = bfd_mach_o_wide_p (abfd);
1958 struct bfd_strtab_hash *strtab;
1959 asymbol **symbols = bfd_get_outsymbols (abfd);
1960 int padlen;
1961
1962 /* Write the symbols first. */
1963 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1964 return FALSE;
1965
1966 strtab = _bfd_stringtab_init ();
1967 if (strtab == NULL)
1968 return FALSE;
1969
1970 if (sym->nsyms > 0)
1971 /* Although we don't strictly need to do this, for compatibility with
1972 Darwin system tools, actually output an empty string for the index
1973 0 entry. */
1974 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1975
1976 for (i = 0; i < sym->nsyms; i++)
1977 {
1978 bfd_size_type str_index;
1979 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1980
1981 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1982 /* An index of 0 always means the empty string. */
1983 str_index = 0;
1984 else
1985 {
1986 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1987
1988 if (str_index == (bfd_size_type) -1)
1989 goto err;
1990 }
1991
1992 if (wide)
1993 {
1994 struct mach_o_nlist_64_external raw;
1995
1996 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1997 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1998 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1999 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2000 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
2001 raw.n_value);
2002
2003 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2004 goto err;
2005 }
2006 else
2007 {
2008 struct mach_o_nlist_external raw;
2009
2010 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2011 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2012 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2013 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2014 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
2015 raw.n_value);
2016
2017 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2018 goto err;
2019 }
2020 }
2021 sym->strsize = _bfd_stringtab_size (strtab);
2022 sym->stroff = mdata->filelen;
2023 mdata->filelen += sym->strsize;
2024
2025 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
2026 goto err;
2027
2028 if (!_bfd_stringtab_emit (abfd, strtab))
2029 goto err;
2030
2031 /* Pad string table. */
2032 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
2033 if (padlen < 0)
2034 return FALSE;
2035 mdata->filelen += padlen;
2036 sym->strsize += padlen;
2037
2038 return TRUE;
2039
2040 err:
2041 _bfd_stringtab_free (strtab);
2042 sym->strsize = 0;
2043 return FALSE;
2044 }
2045
2046 static bfd_boolean
2047 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
2048 {
2049 bfd_mach_o_symtab_command *sym = &command->command.symtab;
2050 struct mach_o_symtab_command_external raw;
2051
2052 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
2053
2054 /* The command. */
2055 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
2056 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
2057 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
2058 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
2059
2060 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
2061 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2062 return FALSE;
2063
2064 return TRUE;
2065 }
2066
2067 /* Count the number of indirect symbols in the image.
2068 Requires that the sections are in their final order. */
2069
2070 static unsigned int
2071 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2072 {
2073 unsigned int i;
2074 unsigned int nisyms = 0;
2075
2076 for (i = 0; i < mdata->nsects; ++i)
2077 {
2078 bfd_mach_o_section *sec = mdata->sections[i];
2079
2080 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2081 {
2082 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2083 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2084 case BFD_MACH_O_S_SYMBOL_STUBS:
2085 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2086 break;
2087 default:
2088 break;
2089 }
2090 }
2091 return nisyms;
2092 }
2093
2094 /* Create the dysymtab. */
2095
2096 static bfd_boolean
2097 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
2098 {
2099 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2100
2101 /* TODO:
2102 We are not going to try and fill these in yet and, moreover, we are
2103 going to bail if they are already set. */
2104 if (cmd->nmodtab != 0
2105 || cmd->ntoc != 0
2106 || cmd->nextrefsyms != 0)
2107 {
2108 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
2109 " implemented for dysymtab commands."));
2110 return FALSE;
2111 }
2112
2113 cmd->ilocalsym = 0;
2114
2115 if (bfd_get_symcount (abfd) > 0)
2116 {
2117 asymbol **symbols = bfd_get_outsymbols (abfd);
2118 unsigned long i;
2119
2120 /* Count the number of each kind of symbol. */
2121 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2122 {
2123 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2124 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2125 break;
2126 }
2127 cmd->nlocalsym = i;
2128 cmd->iextdefsym = i;
2129 for (; i < bfd_get_symcount (abfd); ++i)
2130 {
2131 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2132 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2133 break;
2134 }
2135 cmd->nextdefsym = i - cmd->nlocalsym;
2136 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2137 cmd->nundefsym = bfd_get_symcount (abfd)
2138 - cmd->nlocalsym
2139 - cmd->nextdefsym;
2140 }
2141 else
2142 {
2143 cmd->nlocalsym = 0;
2144 cmd->iextdefsym = 0;
2145 cmd->nextdefsym = 0;
2146 cmd->iundefsym = 0;
2147 cmd->nundefsym = 0;
2148 }
2149
2150 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2151 if (cmd->nindirectsyms > 0)
2152 {
2153 unsigned i;
2154 unsigned n;
2155
2156 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2157 cmd->indirectsymoff = mdata->filelen;
2158 mdata->filelen += cmd->nindirectsyms * 4;
2159
2160 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2161 return FALSE;
2162 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2163 if (cmd->indirect_syms == NULL)
2164 return FALSE;
2165
2166 n = 0;
2167 for (i = 0; i < mdata->nsects; ++i)
2168 {
2169 bfd_mach_o_section *sec = mdata->sections[i];
2170
2171 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2172 {
2173 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2174 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2175 case BFD_MACH_O_S_SYMBOL_STUBS:
2176 {
2177 unsigned j, num;
2178 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2179
2180 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2181 if (isyms == NULL || num == 0)
2182 break;
2183 /* Record the starting index in the reserved1 field. */
2184 sec->reserved1 = n;
2185 for (j = 0; j < num; j++, n++)
2186 {
2187 if (isyms[j] == NULL)
2188 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2189 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2190 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2191 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2192 | BFD_MACH_O_INDIRECT_SYM_ABS;
2193 else
2194 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2195 }
2196 }
2197 break;
2198 default:
2199 break;
2200 }
2201 }
2202 }
2203
2204 return TRUE;
2205 }
2206
2207 /* Write a dysymtab command.
2208 TODO: Possibly coalesce writes of smaller objects. */
2209
2210 static bfd_boolean
2211 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2212 {
2213 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2214
2215 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2216
2217 if (cmd->nmodtab != 0)
2218 {
2219 unsigned int i;
2220
2221 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2222 return FALSE;
2223
2224 for (i = 0; i < cmd->nmodtab; i++)
2225 {
2226 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2227 unsigned int iinit;
2228 unsigned int ninit;
2229
2230 iinit = module->iinit & 0xffff;
2231 iinit |= ((module->iterm & 0xffff) << 16);
2232
2233 ninit = module->ninit & 0xffff;
2234 ninit |= ((module->nterm & 0xffff) << 16);
2235
2236 if (bfd_mach_o_wide_p (abfd))
2237 {
2238 struct mach_o_dylib_module_64_external w;
2239
2240 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2241 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2242 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2243 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2244 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2245 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2246 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2247 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2248 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2249 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2250 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2251 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2252 &w.objc_module_info_addr);
2253 bfd_h_put_32 (abfd, module->objc_module_info_size,
2254 &w.objc_module_info_size);
2255
2256 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2257 return FALSE;
2258 }
2259 else
2260 {
2261 struct mach_o_dylib_module_external n;
2262
2263 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2264 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2265 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2266 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2267 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2268 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2269 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2270 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2271 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2272 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2273 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2274 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2275 &n.objc_module_info_addr);
2276 bfd_h_put_32 (abfd, module->objc_module_info_size,
2277 &n.objc_module_info_size);
2278
2279 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2280 return FALSE;
2281 }
2282 }
2283 }
2284
2285 if (cmd->ntoc != 0)
2286 {
2287 unsigned int i;
2288
2289 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2290 return FALSE;
2291
2292 for (i = 0; i < cmd->ntoc; i++)
2293 {
2294 struct mach_o_dylib_table_of_contents_external raw;
2295 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2296
2297 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2298 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2299
2300 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2301 return FALSE;
2302 }
2303 }
2304
2305 if (cmd->nindirectsyms > 0)
2306 {
2307 unsigned int i;
2308
2309 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2310 return FALSE;
2311
2312 for (i = 0; i < cmd->nindirectsyms; ++i)
2313 {
2314 unsigned char raw[4];
2315
2316 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2317 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2318 return FALSE;
2319 }
2320 }
2321
2322 if (cmd->nextrefsyms != 0)
2323 {
2324 unsigned int i;
2325
2326 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2327 return FALSE;
2328
2329 for (i = 0; i < cmd->nextrefsyms; i++)
2330 {
2331 unsigned long v;
2332 unsigned char raw[4];
2333 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2334
2335 /* Fields isym and flags are written as bit-fields, thus we need
2336 a specific processing for endianness. */
2337
2338 if (bfd_big_endian (abfd))
2339 {
2340 v = ((ref->isym & 0xffffff) << 8);
2341 v |= ref->flags & 0xff;
2342 }
2343 else
2344 {
2345 v = ref->isym & 0xffffff;
2346 v |= ((ref->flags & 0xff) << 24);
2347 }
2348
2349 bfd_h_put_32 (abfd, v, raw);
2350 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2351 return FALSE;
2352 }
2353 }
2354
2355 /* The command. */
2356 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2357 return FALSE;
2358 else
2359 {
2360 struct mach_o_dysymtab_command_external raw;
2361
2362 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2363 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2364 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2365 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2366 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2367 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2368 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2369 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2370 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2371 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2372 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2373 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2374 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2375 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2376 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2377 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2378 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2379 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2380
2381 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2382 return FALSE;
2383 }
2384
2385 return TRUE;
2386 }
2387
2388 static unsigned
2389 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2390 {
2391 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2392
2393 /* Just leave debug symbols where they are (pretend they are local, and
2394 then they will just be sorted on position). */
2395 if (s->n_type & BFD_MACH_O_N_STAB)
2396 return 0;
2397
2398 /* Local (we should never see an undefined local AFAICT). */
2399 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2400 return 0;
2401
2402 /* Common symbols look like undefined externs. */
2403 if (mtyp == BFD_MACH_O_N_UNDF)
2404 return 2;
2405
2406 /* A defined non-local, non-debug symbol. */
2407 return 1;
2408 }
2409
2410 static int
2411 bfd_mach_o_cf_symbols (const void *a, const void *b)
2412 {
2413 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2414 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2415 unsigned int soa, sob;
2416
2417 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2418 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2419 if (soa < sob)
2420 return -1;
2421
2422 if (soa > sob)
2423 return 1;
2424
2425 /* If it's local or stab, just preserve the input order. */
2426 if (soa == 0)
2427 {
2428 if (sa->symbol.udata.i < sb->symbol.udata.i)
2429 return -1;
2430 if (sa->symbol.udata.i > sb->symbol.udata.i)
2431 return 1;
2432
2433 /* This is probably an error. */
2434 return 0;
2435 }
2436
2437 /* The second sort key is name. */
2438 return strcmp (sa->symbol.name, sb->symbol.name);
2439 }
2440
2441 /* Process the symbols.
2442
2443 This should be OK for single-module files - but it is not likely to work
2444 for multi-module shared libraries.
2445
2446 (a) If the application has not filled in the relevant mach-o fields, make
2447 an estimate.
2448
2449 (b) Order them, like this:
2450 ( i) local.
2451 (unsorted)
2452 ( ii) external defined
2453 (by name)
2454 (iii) external undefined/common
2455 (by name)
2456 ( iv) common
2457 (by name)
2458 */
2459
2460 static bfd_boolean
2461 bfd_mach_o_mangle_symbols (bfd *abfd)
2462 {
2463 unsigned long i;
2464 asymbol **symbols = bfd_get_outsymbols (abfd);
2465
2466 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2467 return TRUE;
2468
2469 for (i = 0; i < bfd_get_symcount (abfd); i++)
2470 {
2471 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2472
2473 /* We use this value, which is out-of-range as a symbol index, to signal
2474 that the mach-o-specific data are not filled in and need to be created
2475 from the bfd values. It is much preferable for the application to do
2476 this, since more meaningful diagnostics can be made that way. */
2477
2478 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2479 {
2480 /* No symbol information has been set - therefore determine
2481 it from the bfd symbol flags/info. */
2482 if (s->symbol.section == bfd_abs_section_ptr)
2483 s->n_type = BFD_MACH_O_N_ABS;
2484 else if (s->symbol.section == bfd_und_section_ptr)
2485 {
2486 s->n_type = BFD_MACH_O_N_UNDF;
2487 if (s->symbol.flags & BSF_WEAK)
2488 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2489 /* mach-o automatically makes undefined symbols extern. */
2490 s->n_type |= BFD_MACH_O_N_EXT;
2491 s->symbol.flags |= BSF_GLOBAL;
2492 }
2493 else if (s->symbol.section == bfd_com_section_ptr)
2494 {
2495 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2496 s->symbol.flags |= BSF_GLOBAL;
2497 }
2498 else
2499 s->n_type = BFD_MACH_O_N_SECT;
2500
2501 if (s->symbol.flags & BSF_GLOBAL)
2502 s->n_type |= BFD_MACH_O_N_EXT;
2503 }
2504
2505 /* Put the section index in, where required. */
2506 if ((s->symbol.section != bfd_abs_section_ptr
2507 && s->symbol.section != bfd_und_section_ptr
2508 && s->symbol.section != bfd_com_section_ptr)
2509 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2510 && s->symbol.name == NULL))
2511 s->n_sect = s->symbol.section->output_section->target_index;
2512
2513 /* Number to preserve order for local and debug syms. */
2514 s->symbol.udata.i = i;
2515 }
2516
2517 /* Sort the symbols. */
2518 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2519 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2520
2521 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2522 {
2523 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2524 s->symbol.udata.i = i; /* renumber. */
2525 }
2526
2527 return TRUE;
2528 }
2529
2530 /* We build a flat table of sections, which can be re-ordered if necessary.
2531 Fill in the section number and other mach-o-specific data. */
2532
2533 static bfd_boolean
2534 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2535 {
2536 asection *sec;
2537 unsigned target_index;
2538 unsigned nsect;
2539
2540 nsect = bfd_count_sections (abfd);
2541
2542 /* Don't do it if it's already set - assume the application knows what it's
2543 doing. */
2544 if (mdata->nsects == nsect
2545 && (mdata->nsects == 0 || mdata->sections != NULL))
2546 return TRUE;
2547
2548 /* We need to check that this can be done... */
2549 if (nsect > 255)
2550 {
2551 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2552 " maximum is 255,\n"), nsect);
2553 return FALSE;
2554 }
2555
2556 mdata->nsects = nsect;
2557 mdata->sections = bfd_alloc2 (abfd,
2558 mdata->nsects, sizeof (bfd_mach_o_section *));
2559 if (mdata->sections == NULL)
2560 return FALSE;
2561
2562 /* Create Mach-O sections.
2563 Section type, attribute and align should have been set when the
2564 section was created - either read in or specified. */
2565 target_index = 0;
2566 for (sec = abfd->sections; sec; sec = sec->next)
2567 {
2568 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2569 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2570
2571 mdata->sections[target_index] = msect;
2572
2573 msect->addr = bfd_get_section_vma (abfd, sec);
2574 msect->size = bfd_get_section_size (sec);
2575
2576 /* Use the largest alignment set, in case it was bumped after the
2577 section was created. */
2578 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2579
2580 msect->offset = 0;
2581 sec->target_index = ++target_index;
2582 }
2583
2584 return TRUE;
2585 }
2586
2587 bfd_boolean
2588 bfd_mach_o_write_contents (bfd *abfd)
2589 {
2590 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2591 bfd_mach_o_load_command *cmd;
2592 bfd_mach_o_symtab_command *symtab = NULL;
2593 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2594 bfd_mach_o_segment_command *linkedit = NULL;
2595
2596 /* Make the commands, if not already present. */
2597 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2598 return FALSE;
2599 abfd->output_has_begun = TRUE;
2600
2601 /* Write the header. */
2602 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2603 return FALSE;
2604
2605 /* First pass: allocate the linkedit segment. */
2606 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2607 switch (cmd->type)
2608 {
2609 case BFD_MACH_O_LC_SEGMENT_64:
2610 case BFD_MACH_O_LC_SEGMENT:
2611 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2612 linkedit = &cmd->command.segment;
2613 break;
2614 case BFD_MACH_O_LC_SYMTAB:
2615 symtab = &cmd->command.symtab;
2616 break;
2617 case BFD_MACH_O_LC_DYSYMTAB:
2618 dysymtab = &cmd->command.dysymtab;
2619 break;
2620 case BFD_MACH_O_LC_DYLD_INFO:
2621 {
2622 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2623
2624 if (di->rebase_size != 0)
2625 {
2626 di->rebase_off = mdata->filelen;
2627 mdata->filelen += di->rebase_size;
2628 }
2629 if (di->bind_size != 0)
2630 {
2631 di->bind_off = mdata->filelen;
2632 mdata->filelen += di->bind_size;
2633 }
2634 if (di->weak_bind_size != 0)
2635 {
2636 di->weak_bind_off = mdata->filelen;
2637 mdata->filelen += di->weak_bind_size;
2638 }
2639 if (di->lazy_bind_size != 0)
2640 {
2641 di->lazy_bind_off = mdata->filelen;
2642 mdata->filelen += di->lazy_bind_size;
2643 }
2644 if (di->export_size != 0)
2645 {
2646 di->export_off = mdata->filelen;
2647 mdata->filelen += di->export_size;
2648 }
2649 }
2650 break;
2651 case BFD_MACH_O_LC_LOAD_DYLIB:
2652 case BFD_MACH_O_LC_LOAD_DYLINKER:
2653 case BFD_MACH_O_LC_MAIN:
2654 /* Nothing to do. */
2655 break;
2656 default:
2657 _bfd_error_handler
2658 (_("unable to allocate data for load command %#x"),
2659 cmd->type);
2660 break;
2661 }
2662
2663 /* Specially handle symtab and dysymtab. */
2664
2665 /* Pre-allocate the symbol table (but not the string table). The reason
2666 is that the dysymtab is after the symbol table but before the string
2667 table (required by the native strip tool). */
2668 if (symtab != NULL)
2669 {
2670 unsigned int symlen;
2671 unsigned int wide = bfd_mach_o_wide_p (abfd);
2672
2673 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2674
2675 /* Align for symbols. */
2676 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2677 symtab->symoff = mdata->filelen;
2678
2679 symtab->nsyms = bfd_get_symcount (abfd);
2680 mdata->filelen += symtab->nsyms * symlen;
2681 }
2682
2683 /* Build the dysymtab. */
2684 if (dysymtab != NULL)
2685 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2686 return FALSE;
2687
2688 /* Write symtab and strtab. */
2689 if (symtab != NULL)
2690 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2691 return FALSE;
2692
2693 /* Adjust linkedit size. */
2694 if (linkedit != NULL)
2695 {
2696 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2697
2698 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2699 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2700 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2701
2702 linkedit->initprot = BFD_MACH_O_PROT_READ;
2703 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2704 | BFD_MACH_O_PROT_EXECUTE;
2705 }
2706
2707 /* Second pass: write commands. */
2708 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2709 {
2710 struct mach_o_load_command_external raw;
2711 unsigned long typeflag;
2712
2713 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2714
2715 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2716 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2717
2718 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2719 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2720 return FALSE;
2721
2722 switch (cmd->type)
2723 {
2724 case BFD_MACH_O_LC_SEGMENT:
2725 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2726 return FALSE;
2727 break;
2728 case BFD_MACH_O_LC_SEGMENT_64:
2729 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2730 return FALSE;
2731 break;
2732 case BFD_MACH_O_LC_SYMTAB:
2733 if (!bfd_mach_o_write_symtab (abfd, cmd))
2734 return FALSE;
2735 break;
2736 case BFD_MACH_O_LC_DYSYMTAB:
2737 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2738 return FALSE;
2739 break;
2740 case BFD_MACH_O_LC_THREAD:
2741 case BFD_MACH_O_LC_UNIXTHREAD:
2742 if (!bfd_mach_o_write_thread (abfd, cmd))
2743 return FALSE;
2744 break;
2745 case BFD_MACH_O_LC_LOAD_DYLIB:
2746 if (!bfd_mach_o_write_dylib (abfd, cmd))
2747 return FALSE;
2748 break;
2749 case BFD_MACH_O_LC_LOAD_DYLINKER:
2750 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2751 return FALSE;
2752 break;
2753 case BFD_MACH_O_LC_MAIN:
2754 if (!bfd_mach_o_write_main (abfd, cmd))
2755 return FALSE;
2756 break;
2757 case BFD_MACH_O_LC_DYLD_INFO:
2758 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2759 return FALSE;
2760 break;
2761 default:
2762 _bfd_error_handler
2763 (_("unable to write unknown load command %#x"),
2764 cmd->type);
2765 return FALSE;
2766 }
2767 }
2768
2769 return TRUE;
2770 }
2771
2772 static void
2773 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2774 bfd_mach_o_section *s)
2775 {
2776 if (seg->sect_head == NULL)
2777 seg->sect_head = s;
2778 else
2779 seg->sect_tail->next = s;
2780 seg->sect_tail = s;
2781 }
2782
2783 /* Create section Mach-O flags from BFD flags. */
2784
2785 static void
2786 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2787 asection *sec)
2788 {
2789 flagword bfd_flags;
2790 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2791
2792 /* Create default flags. */
2793 bfd_flags = bfd_get_section_flags (abfd, sec);
2794 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2795 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2796 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2797 | BFD_MACH_O_S_REGULAR;
2798 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2799 s->flags = BFD_MACH_O_S_ZEROFILL;
2800 else if (bfd_flags & SEC_DEBUGGING)
2801 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2802 else
2803 s->flags = BFD_MACH_O_S_REGULAR;
2804 }
2805
2806 static bfd_boolean
2807 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2808 {
2809 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2810 unsigned int i, j;
2811
2812 seg->vmaddr = 0;
2813 seg->fileoff = mdata->filelen;
2814 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2815 | BFD_MACH_O_PROT_EXECUTE;
2816 seg->maxprot = seg->initprot;
2817
2818 /* Append sections to the segment.
2819
2820 This is a little tedious, we have to honor the need to account zerofill
2821 sections after all the rest. This forces us to do the calculation of
2822 total vmsize in three passes so that any alignment increments are
2823 properly accounted. */
2824 for (i = 0; i < mdata->nsects; ++i)
2825 {
2826 bfd_mach_o_section *s = mdata->sections[i];
2827 asection *sec = s->bfdsection;
2828
2829 /* Although we account for zerofill section sizes in vm order, they are
2830 placed in the file in source sequence. */
2831 bfd_mach_o_append_section_to_segment (seg, s);
2832 s->offset = 0;
2833
2834 /* Zerofill sections have zero file size & offset, the only content
2835 written to the file is the symbols. */
2836 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2837 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2838 == BFD_MACH_O_S_GB_ZEROFILL))
2839 continue;
2840
2841 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2842 sections, even those with zero size. */
2843 if (s->size > 0)
2844 {
2845 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2846 seg->vmsize += s->size;
2847
2848 /* MH_OBJECT files have unaligned content. */
2849 if (1)
2850 {
2851 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2852 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2853 }
2854 seg->filesize += s->size;
2855
2856 /* The system tools write even zero-sized sections with an offset
2857 field set to the current file position. */
2858 s->offset = mdata->filelen;
2859 }
2860
2861 sec->filepos = s->offset;
2862 mdata->filelen += s->size;
2863 }
2864
2865 /* Now pass through again, for zerofill, only now we just update the
2866 vmsize, and then for zerofill_GB. */
2867 for (j = 0; j < 2; j++)
2868 {
2869 unsigned int stype;
2870
2871 if (j == 0)
2872 stype = BFD_MACH_O_S_ZEROFILL;
2873 else
2874 stype = BFD_MACH_O_S_GB_ZEROFILL;
2875
2876 for (i = 0; i < mdata->nsects; ++i)
2877 {
2878 bfd_mach_o_section *s = mdata->sections[i];
2879
2880 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2881 continue;
2882
2883 if (s->size > 0)
2884 {
2885 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2886 seg->vmsize += s->size;
2887 }
2888 }
2889 }
2890
2891 /* Allocate space for the relocations. */
2892 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2893
2894 for (i = 0; i < mdata->nsects; ++i)
2895 {
2896 bfd_mach_o_section *ms = mdata->sections[i];
2897 asection *sec = ms->bfdsection;
2898
2899 ms->nreloc = sec->reloc_count;
2900 if (ms->nreloc == 0)
2901 {
2902 /* Clear nreloc and reloff if there is no relocs. */
2903 ms->reloff = 0;
2904 continue;
2905 }
2906 sec->rel_filepos = mdata->filelen;
2907 ms->reloff = sec->rel_filepos;
2908 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2909 }
2910
2911 return TRUE;
2912 }
2913
2914 static bfd_boolean
2915 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2916 {
2917 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2918 unsigned int i;
2919 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2920 bfd_vma vma;
2921 bfd_mach_o_section *s;
2922
2923 seg->vmsize = 0;
2924
2925 seg->fileoff = mdata->filelen;
2926 seg->maxprot = 0;
2927 seg->initprot = 0;
2928 seg->flags = 0;
2929
2930 /* Append sections to the segment. We assume they are properly ordered
2931 by vma (but we check that). */
2932 vma = 0;
2933 for (i = 0; i < mdata->nsects; ++i)
2934 {
2935 s = mdata->sections[i];
2936
2937 /* Consider only sections for this segment. */
2938 if (strcmp (seg->segname, s->segname) != 0)
2939 continue;
2940
2941 bfd_mach_o_append_section_to_segment (seg, s);
2942
2943 if (s->addr < vma)
2944 {
2945 _bfd_error_handler
2946 /* xgettext:c-format */
2947 (_("section address (%#" PRIx64 ") "
2948 "below start of segment (%#" PRIx64 ")"),
2949 (uint64_t) s->addr, (uint64_t) vma);
2950 return FALSE;
2951 }
2952
2953 vma = s->addr + s->size;
2954 }
2955
2956 /* Set segment file offset: make it page aligned. */
2957 vma = seg->sect_head->addr;
2958 seg->vmaddr = vma & ~pagemask;
2959 if ((mdata->filelen & pagemask) > (vma & pagemask))
2960 mdata->filelen += pagemask + 1;
2961 seg->fileoff = mdata->filelen & ~pagemask;
2962 mdata->filelen = seg->fileoff + (vma & pagemask);
2963
2964 /* Set section file offset. */
2965 for (s = seg->sect_head; s != NULL; s = s->next)
2966 {
2967 asection *sec = s->bfdsection;
2968 flagword flags = bfd_get_section_flags (abfd, sec);
2969
2970 /* Adjust segment size. */
2971 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2972 seg->vmsize += s->size;
2973
2974 /* File offset and length. */
2975 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2976
2977 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2978 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2979 != BFD_MACH_O_S_GB_ZEROFILL))
2980 {
2981 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2982
2983 s->offset = mdata->filelen;
2984 s->bfdsection->filepos = s->offset;
2985
2986 seg->filesize += s->size;
2987 mdata->filelen += s->size;
2988 }
2989 else
2990 {
2991 s->offset = 0;
2992 s->bfdsection->filepos = 0;
2993 }
2994
2995 /* Set protection. */
2996 if (flags & SEC_LOAD)
2997 {
2998 if (flags & SEC_CODE)
2999 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
3000 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
3001 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
3002 }
3003
3004 /* Relocs shouldn't appear in non-object files. */
3005 if (s->bfdsection->reloc_count != 0)
3006 return FALSE;
3007 }
3008
3009 /* Set maxprot. */
3010 if (seg->initprot != 0)
3011 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
3012 | BFD_MACH_O_PROT_EXECUTE;
3013 else
3014 seg->maxprot = 0;
3015
3016 /* Round segment size (and file size). */
3017 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
3018 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
3019 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
3020
3021 return TRUE;
3022 }
3023
3024 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
3025 fields in header. */
3026
3027 static bfd_boolean
3028 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
3029 {
3030 unsigned wide = mach_o_wide_p (&mdata->header);
3031 unsigned int hdrlen;
3032 ufile_ptr offset;
3033 bfd_mach_o_load_command *cmd;
3034 unsigned int align;
3035 bfd_boolean ret = TRUE;
3036
3037 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3038 align = wide ? 8 - 1 : 4 - 1;
3039 offset = hdrlen;
3040 mdata->header.ncmds = 0;
3041
3042 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
3043 {
3044 mdata->header.ncmds++;
3045 cmd->offset = offset;
3046
3047 switch (cmd->type)
3048 {
3049 case BFD_MACH_O_LC_SEGMENT_64:
3050 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
3051 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
3052 break;
3053 case BFD_MACH_O_LC_SEGMENT:
3054 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
3055 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
3056 break;
3057 case BFD_MACH_O_LC_SYMTAB:
3058 cmd->len = sizeof (struct mach_o_symtab_command_external)
3059 + BFD_MACH_O_LC_SIZE;
3060 break;
3061 case BFD_MACH_O_LC_DYSYMTAB:
3062 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
3063 + BFD_MACH_O_LC_SIZE;
3064 break;
3065 case BFD_MACH_O_LC_LOAD_DYLIB:
3066 cmd->len = sizeof (struct mach_o_dylib_command_external)
3067 + BFD_MACH_O_LC_SIZE;
3068 cmd->command.dylib.name_offset = cmd->len;
3069 cmd->len += strlen (cmd->command.dylib.name_str);
3070 cmd->len = (cmd->len + align) & ~align;
3071 break;
3072 case BFD_MACH_O_LC_LOAD_DYLINKER:
3073 cmd->len = sizeof (struct mach_o_str_command_external)
3074 + BFD_MACH_O_LC_SIZE;
3075 cmd->command.dylinker.name_offset = cmd->len;
3076 cmd->len += strlen (cmd->command.dylinker.name_str);
3077 cmd->len = (cmd->len + align) & ~align;
3078 break;
3079 case BFD_MACH_O_LC_MAIN:
3080 cmd->len = sizeof (struct mach_o_entry_point_command_external)
3081 + BFD_MACH_O_LC_SIZE;
3082 break;
3083 case BFD_MACH_O_LC_DYLD_INFO:
3084 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
3085 + BFD_MACH_O_LC_SIZE;
3086 break;
3087 default:
3088 _bfd_error_handler
3089 (_("unable to layout unknown load command %#x"),
3090 cmd->type);
3091 ret = FALSE;
3092 break;
3093 }
3094
3095 BFD_ASSERT (cmd->len % (align + 1) == 0);
3096 offset += cmd->len;
3097 }
3098 mdata->header.sizeofcmds = offset - hdrlen;
3099 mdata->filelen = offset;
3100
3101 return ret;
3102 }
3103
3104 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
3105 segment. */
3106
3107 static void
3108 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
3109 bfd_mach_o_load_command *cmd,
3110 const char *segname, unsigned int nbr_sect)
3111 {
3112 bfd_mach_o_segment_command *seg = &cmd->command.segment;
3113 unsigned wide = mach_o_wide_p (&mdata->header);
3114
3115 /* Init segment command. */
3116 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
3117 cmd->type_required = FALSE;
3118
3119 strcpy (seg->segname, segname);
3120 seg->nsects = nbr_sect;
3121
3122 seg->vmaddr = 0;
3123 seg->vmsize = 0;
3124
3125 seg->fileoff = 0;
3126 seg->filesize = 0;
3127 seg->maxprot = 0;
3128 seg->initprot = 0;
3129 seg->flags = 0;
3130 seg->sect_head = NULL;
3131 seg->sect_tail = NULL;
3132 }
3133
3134 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3135 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3136 and copy functionality. */
3137
3138 bfd_boolean
3139 bfd_mach_o_build_commands (bfd *abfd)
3140 {
3141 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3142 unsigned wide = mach_o_wide_p (&mdata->header);
3143 unsigned int nbr_segcmd = 0;
3144 bfd_mach_o_load_command *commands;
3145 unsigned int nbr_commands;
3146 int symtab_idx = -1;
3147 int dysymtab_idx = -1;
3148 int main_idx = -1;
3149 unsigned int i;
3150
3151 /* Return now if already built. */
3152 if (mdata->header.ncmds != 0)
3153 return TRUE;
3154
3155 /* Fill in the file type, if not already set. */
3156 if (mdata->header.filetype == 0)
3157 {
3158 if (abfd->flags & EXEC_P)
3159 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3160 else if (abfd->flags & DYNAMIC)
3161 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3162 else
3163 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3164 }
3165
3166 /* If hasn't already been done, flatten sections list, and sort
3167 if/when required. Must be done before the symbol table is adjusted,
3168 since that depends on properly numbered sections. */
3169 if (mdata->nsects == 0 || mdata->sections == NULL)
3170 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3171 return FALSE;
3172
3173 /* Order the symbol table, fill-in/check mach-o specific fields and
3174 partition out any indirect symbols. */
3175 if (!bfd_mach_o_mangle_symbols (abfd))
3176 return FALSE;
3177
3178 /* Segment commands. */
3179 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3180 {
3181 /* Only one segment for all the sections. But the segment is
3182 optional if there is no sections. */
3183 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3184 }
3185 else
3186 {
3187 bfd_mach_o_section *prev_sect = NULL;
3188
3189 /* One pagezero segment and one linkedit segment. */
3190 nbr_segcmd = 2;
3191
3192 /* Create one segment for associated segment name in sections.
3193 Assume that sections with the same segment name are consecutive. */
3194 for (i = 0; i < mdata->nsects; i++)
3195 {
3196 bfd_mach_o_section *this_sect = mdata->sections[i];
3197
3198 if (prev_sect == NULL
3199 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3200 {
3201 nbr_segcmd++;
3202 prev_sect = this_sect;
3203 }
3204 }
3205 }
3206
3207 nbr_commands = nbr_segcmd;
3208
3209 /* One command for the symbol table (only if there are symbols. */
3210 if (bfd_get_symcount (abfd) > 0)
3211 symtab_idx = nbr_commands++;
3212
3213 /* FIXME:
3214 This is a rather crude test for whether we should build a dysymtab. */
3215 if (bfd_mach_o_should_emit_dysymtab ()
3216 && bfd_get_symcount (abfd))
3217 {
3218 /* If there should be a case where a dysymtab could be emitted without
3219 a symtab (seems improbable), this would need amending. */
3220 dysymtab_idx = nbr_commands++;
3221 }
3222
3223 /* Add an entry point command. */
3224 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3225 && bfd_get_start_address (abfd) != 0)
3226 main_idx = nbr_commands++;
3227
3228 /* Well, we must have a header, at least. */
3229 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3230
3231 /* A bit unusual, but no content is valid;
3232 as -n empty.s -o empty.o */
3233 if (nbr_commands == 0)
3234 {
3235 /* Layout commands (well none...) and set headers command fields. */
3236 return bfd_mach_o_layout_commands (mdata);
3237 }
3238
3239 /* Create commands for segments (and symtabs), prepend them. */
3240 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3241 if (commands == NULL)
3242 return FALSE;
3243 for (i = 0; i < nbr_commands - 1; i++)
3244 commands[i].next = &commands[i + 1];
3245 commands[nbr_commands - 1].next = mdata->first_command;
3246 if (mdata->first_command == NULL)
3247 mdata->last_command = &commands[nbr_commands - 1];
3248 mdata->first_command = &commands[0];
3249
3250 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3251 {
3252 /* For object file, there is only one segment. */
3253 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3254 }
3255 else if (nbr_segcmd != 0)
3256 {
3257 bfd_mach_o_load_command *cmd;
3258
3259 BFD_ASSERT (nbr_segcmd >= 2);
3260
3261 /* The pagezero. */
3262 cmd = &commands[0];
3263 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3264
3265 /* Segments from sections. */
3266 cmd++;
3267 for (i = 0; i < mdata->nsects;)
3268 {
3269 const char *segname = mdata->sections[i]->segname;
3270 unsigned int nbr_sect = 1;
3271
3272 /* Count number of sections for this segment. */
3273 for (i++; i < mdata->nsects; i++)
3274 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3275 nbr_sect++;
3276 else
3277 break;
3278
3279 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3280 cmd++;
3281 }
3282
3283 /* The linkedit. */
3284 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3285 }
3286
3287 if (symtab_idx >= 0)
3288 {
3289 /* Init symtab command. */
3290 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3291
3292 cmd->type = BFD_MACH_O_LC_SYMTAB;
3293 cmd->type_required = FALSE;
3294 }
3295
3296 /* If required, setup symtab command, see comment above about the quality
3297 of this test. */
3298 if (dysymtab_idx >= 0)
3299 {
3300 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3301
3302 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3303 cmd->type_required = FALSE;
3304 }
3305
3306 /* Create the main command. */
3307 if (main_idx >= 0)
3308 {
3309 bfd_mach_o_load_command *cmd = &commands[main_idx];
3310
3311 cmd->type = BFD_MACH_O_LC_MAIN;
3312 cmd->type_required = TRUE;
3313
3314 cmd->command.main.entryoff = 0;
3315 cmd->command.main.stacksize = 0;
3316 }
3317
3318 /* Layout commands. */
3319 if (! bfd_mach_o_layout_commands (mdata))
3320 return FALSE;
3321
3322 /* So, now we have sized the commands and the filelen set to that.
3323 Now we can build the segment command and set the section file offsets. */
3324 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3325 {
3326 for (i = 0; i < nbr_segcmd; i++)
3327 if (!bfd_mach_o_build_obj_seg_command
3328 (abfd, &commands[i].command.segment))
3329 return FALSE;
3330 }
3331 else
3332 {
3333 bfd_vma maxvma = 0;
3334
3335 /* Skip pagezero and linkedit segments. */
3336 for (i = 1; i < nbr_segcmd - 1; i++)
3337 {
3338 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3339
3340 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3341 return FALSE;
3342
3343 if (seg->vmaddr + seg->vmsize > maxvma)
3344 maxvma = seg->vmaddr + seg->vmsize;
3345 }
3346
3347 /* Set the size of __PAGEZERO. */
3348 commands[0].command.segment.vmsize =
3349 commands[1].command.segment.vmaddr;
3350
3351 /* Set the vma and fileoff of __LINKEDIT. */
3352 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3353 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3354
3355 /* Set entry point (once segments have been laid out). */
3356 if (main_idx >= 0)
3357 commands[main_idx].command.main.entryoff =
3358 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3359 }
3360
3361 return TRUE;
3362 }
3363
3364 /* Set the contents of a section. */
3365
3366 bfd_boolean
3367 bfd_mach_o_set_section_contents (bfd *abfd,
3368 asection *section,
3369 const void * location,
3370 file_ptr offset,
3371 bfd_size_type count)
3372 {
3373 file_ptr pos;
3374
3375 /* Trying to write the first section contents will trigger the creation of
3376 the load commands if they are not already present. */
3377 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3378 return FALSE;
3379
3380 if (count == 0)
3381 return TRUE;
3382
3383 pos = section->filepos + offset;
3384 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3385 || bfd_bwrite (location, count, abfd) != count)
3386 return FALSE;
3387
3388 return TRUE;
3389 }
3390
3391 int
3392 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3393 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3394 {
3395 return 0;
3396 }
3397
3398 /* Make an empty symbol. This is required only because
3399 bfd_make_section_anyway wants to create a symbol for the section. */
3400
3401 asymbol *
3402 bfd_mach_o_make_empty_symbol (bfd *abfd)
3403 {
3404 asymbol *new_symbol;
3405
3406 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3407 if (new_symbol == NULL)
3408 return new_symbol;
3409 new_symbol->the_bfd = abfd;
3410 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3411 return new_symbol;
3412 }
3413
3414 static bfd_boolean
3415 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3416 {
3417 struct mach_o_header_external raw;
3418 unsigned int size;
3419 bfd_vma (*get32) (const void *) = NULL;
3420
3421 /* Just read the magic number. */
3422 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3423 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3424 return FALSE;
3425
3426 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3427 {
3428 header->byteorder = BFD_ENDIAN_BIG;
3429 header->magic = BFD_MACH_O_MH_MAGIC;
3430 header->version = 1;
3431 get32 = bfd_getb32;
3432 }
3433 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3434 {
3435 header->byteorder = BFD_ENDIAN_LITTLE;
3436 header->magic = BFD_MACH_O_MH_MAGIC;
3437 header->version = 1;
3438 get32 = bfd_getl32;
3439 }
3440 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3441 {
3442 header->byteorder = BFD_ENDIAN_BIG;
3443 header->magic = BFD_MACH_O_MH_MAGIC_64;
3444 header->version = 2;
3445 get32 = bfd_getb32;
3446 }
3447 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3448 {
3449 header->byteorder = BFD_ENDIAN_LITTLE;
3450 header->magic = BFD_MACH_O_MH_MAGIC_64;
3451 header->version = 2;
3452 get32 = bfd_getl32;
3453 }
3454 else
3455 {
3456 header->byteorder = BFD_ENDIAN_UNKNOWN;
3457 return FALSE;
3458 }
3459
3460 /* Once the size of the header is known, read the full header. */
3461 size = mach_o_wide_p (header) ?
3462 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3463
3464 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3465 || bfd_bread (&raw, size, abfd) != size)
3466 return FALSE;
3467
3468 header->cputype = (*get32) (raw.cputype);
3469 header->cpusubtype = (*get32) (raw.cpusubtype);
3470 header->filetype = (*get32) (raw.filetype);
3471 header->ncmds = (*get32) (raw.ncmds);
3472 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3473 header->flags = (*get32) (raw.flags);
3474
3475 if (mach_o_wide_p (header))
3476 header->reserved = (*get32) (raw.reserved);
3477 else
3478 header->reserved = 0;
3479
3480 return TRUE;
3481 }
3482
3483 bfd_boolean
3484 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3485 {
3486 bfd_mach_o_section *s;
3487 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3488
3489 s = bfd_mach_o_get_mach_o_section (sec);
3490 if (s == NULL)
3491 {
3492 flagword bfd_flags;
3493 static const mach_o_section_name_xlat * xlat;
3494
3495 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3496 if (s == NULL)
3497 return FALSE;
3498 sec->used_by_bfd = s;
3499 s->bfdsection = sec;
3500
3501 /* Create the Darwin seg/sect name pair from the bfd name.
3502 If this is a canonical name for which a specific paiting exists
3503 there will also be defined flags, type, attribute and alignment
3504 values. */
3505 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3506 if (xlat != NULL)
3507 {
3508 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3509 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3510 : bfdalign;
3511 (void) bfd_set_section_alignment (abfd, sec, s->align);
3512 bfd_flags = bfd_get_section_flags (abfd, sec);
3513 if (bfd_flags == SEC_NO_FLAGS)
3514 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3515 }
3516 else
3517 /* Create default flags. */
3518 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3519 }
3520
3521 return _bfd_generic_new_section_hook (abfd, sec);
3522 }
3523
3524 static void
3525 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3526 unsigned long prot)
3527 {
3528 flagword flags;
3529 bfd_mach_o_section *section;
3530
3531 flags = bfd_get_section_flags (abfd, sec);
3532 section = bfd_mach_o_get_mach_o_section (sec);
3533
3534 /* TODO: see if we should use the xlat system for doing this by
3535 preference and fall back to this for unknown sections. */
3536
3537 if (flags == SEC_NO_FLAGS)
3538 {
3539 /* Try to guess flags. */
3540 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3541 flags = SEC_DEBUGGING;
3542 else
3543 {
3544 flags = SEC_ALLOC;
3545 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3546 != BFD_MACH_O_S_ZEROFILL)
3547 {
3548 flags |= SEC_LOAD;
3549 if (prot & BFD_MACH_O_PROT_EXECUTE)
3550 flags |= SEC_CODE;
3551 if (prot & BFD_MACH_O_PROT_WRITE)
3552 flags |= SEC_DATA;
3553 else if (prot & BFD_MACH_O_PROT_READ)
3554 flags |= SEC_READONLY;
3555 }
3556 }
3557 }
3558 else
3559 {
3560 if ((flags & SEC_DEBUGGING) == 0)
3561 flags |= SEC_ALLOC;
3562 }
3563
3564 if (section->offset != 0)
3565 flags |= SEC_HAS_CONTENTS;
3566 if (section->nreloc != 0)
3567 flags |= SEC_RELOC;
3568
3569 bfd_set_section_flags (abfd, sec, flags);
3570
3571 sec->vma = section->addr;
3572 sec->lma = section->addr;
3573 sec->size = section->size;
3574 sec->filepos = section->offset;
3575 sec->alignment_power = section->align;
3576 sec->segment_mark = 0;
3577 sec->reloc_count = section->nreloc;
3578 sec->rel_filepos = section->reloff;
3579 }
3580
3581 static asection *
3582 bfd_mach_o_make_bfd_section (bfd *abfd,
3583 const unsigned char *segname,
3584 const unsigned char *sectname)
3585 {
3586 const char *sname;
3587 flagword flags;
3588
3589 bfd_mach_o_convert_section_name_to_bfd
3590 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3591 if (sname == NULL)
3592 return NULL;
3593
3594 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3595 }
3596
3597 static asection *
3598 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3599 {
3600 struct mach_o_section_32_external raw;
3601 asection *sec;
3602 bfd_mach_o_section *section;
3603
3604 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3605 != BFD_MACH_O_SECTION_SIZE)
3606 return NULL;
3607
3608 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3609 if (sec == NULL)
3610 return NULL;
3611
3612 section = bfd_mach_o_get_mach_o_section (sec);
3613 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3614 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3615 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3616 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3617 section->addr = bfd_h_get_32 (abfd, raw.addr);
3618 section->size = bfd_h_get_32 (abfd, raw.size);
3619 section->offset = bfd_h_get_32 (abfd, raw.offset);
3620 section->align = bfd_h_get_32 (abfd, raw.align);
3621 /* PR 17512: file: 0017eb76. */
3622 if (section->align > 64)
3623 {
3624 _bfd_error_handler
3625 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3626 "using 32 instead"), section->align);
3627 section->align = 32;
3628 }
3629 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3630 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3631 section->flags = bfd_h_get_32 (abfd, raw.flags);
3632 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3633 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3634 section->reserved3 = 0;
3635
3636 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3637
3638 return sec;
3639 }
3640
3641 static asection *
3642 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3643 {
3644 struct mach_o_section_64_external raw;
3645 asection *sec;
3646 bfd_mach_o_section *section;
3647
3648 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3649 != BFD_MACH_O_SECTION_64_SIZE)
3650 return NULL;
3651
3652 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3653 if (sec == NULL)
3654 return NULL;
3655
3656 section = bfd_mach_o_get_mach_o_section (sec);
3657 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3658 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3659 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3660 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3661 section->addr = bfd_h_get_64 (abfd, raw.addr);
3662 section->size = bfd_h_get_64 (abfd, raw.size);
3663 section->offset = bfd_h_get_32 (abfd, raw.offset);
3664 section->align = bfd_h_get_32 (abfd, raw.align);
3665 if (section->align > 64)
3666 {
3667 _bfd_error_handler
3668 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3669 "using 32 instead"), section->align);
3670 section->align = 32;
3671 }
3672 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3673 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3674 section->flags = bfd_h_get_32 (abfd, raw.flags);
3675 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3676 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3677 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3678
3679 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3680
3681 return sec;
3682 }
3683
3684 static asection *
3685 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3686 {
3687 if (wide)
3688 return bfd_mach_o_read_section_64 (abfd, prot);
3689 else
3690 return bfd_mach_o_read_section_32 (abfd, prot);
3691 }
3692
3693 static bfd_boolean
3694 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3695 bfd_mach_o_symtab_command *sym,
3696 bfd_mach_o_asymbol *s,
3697 unsigned long i)
3698 {
3699 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3700 unsigned int wide = mach_o_wide_p (&mdata->header);
3701 unsigned int symwidth =
3702 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3703 unsigned int symoff = sym->symoff + (i * symwidth);
3704 struct mach_o_nlist_64_external raw;
3705 unsigned char type = -1;
3706 unsigned char section = -1;
3707 short desc = -1;
3708 symvalue value = -1;
3709 unsigned long stroff = -1;
3710 unsigned int symtype = -1;
3711
3712 BFD_ASSERT (sym->strtab != NULL);
3713
3714 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3715 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3716 {
3717 _bfd_error_handler
3718 /* xgettext:c-format */
3719 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3720 symwidth, symoff);
3721 return FALSE;
3722 }
3723
3724 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3725 type = bfd_h_get_8 (abfd, raw.n_type);
3726 symtype = type & BFD_MACH_O_N_TYPE;
3727 section = bfd_h_get_8 (abfd, raw.n_sect);
3728 desc = bfd_h_get_16 (abfd, raw.n_desc);
3729 if (wide)
3730 value = bfd_h_get_64 (abfd, raw.n_value);
3731 else
3732 value = bfd_h_get_32 (abfd, raw.n_value);
3733
3734 if (stroff >= sym->strsize)
3735 {
3736 _bfd_error_handler
3737 /* xgettext:c-format */
3738 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3739 stroff,
3740 sym->strsize);
3741 return FALSE;
3742 }
3743
3744 s->symbol.the_bfd = abfd;
3745 s->symbol.name = sym->strtab + stroff;
3746 s->symbol.value = value;
3747 s->symbol.flags = 0x0;
3748 s->symbol.udata.i = i;
3749 s->n_type = type;
3750 s->n_sect = section;
3751 s->n_desc = desc;
3752
3753 if (type & BFD_MACH_O_N_STAB)
3754 {
3755 s->symbol.flags |= BSF_DEBUGGING;
3756 s->symbol.section = bfd_und_section_ptr;
3757 switch (type)
3758 {
3759 case N_FUN:
3760 case N_STSYM:
3761 case N_LCSYM:
3762 case N_BNSYM:
3763 case N_SLINE:
3764 case N_ENSYM:
3765 case N_ECOMM:
3766 case N_ECOML:
3767 case N_GSYM:
3768 if ((section > 0) && (section <= mdata->nsects))
3769 {
3770 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3771 s->symbol.value =
3772 s->symbol.value - mdata->sections[section - 1]->addr;
3773 }
3774 break;
3775 }
3776 }
3777 else
3778 {
3779 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3780 s->symbol.flags |= BSF_GLOBAL;
3781 else
3782 s->symbol.flags |= BSF_LOCAL;
3783
3784 switch (symtype)
3785 {
3786 case BFD_MACH_O_N_UNDF:
3787 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3788 && s->symbol.value != 0)
3789 {
3790 /* A common symbol. */
3791 s->symbol.section = bfd_com_section_ptr;
3792 s->symbol.flags = BSF_NO_FLAGS;
3793 }
3794 else
3795 {
3796 s->symbol.section = bfd_und_section_ptr;
3797 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3798 s->symbol.flags |= BSF_WEAK;
3799 }
3800 break;
3801 case BFD_MACH_O_N_PBUD:
3802 s->symbol.section = bfd_und_section_ptr;
3803 break;
3804 case BFD_MACH_O_N_ABS:
3805 s->symbol.section = bfd_abs_section_ptr;
3806 break;
3807 case BFD_MACH_O_N_SECT:
3808 if ((section > 0) && (section <= mdata->nsects))
3809 {
3810 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3811 s->symbol.value =
3812 s->symbol.value - mdata->sections[section - 1]->addr;
3813 }
3814 else
3815 {
3816 /* Mach-O uses 0 to mean "no section"; not an error. */
3817 if (section != 0)
3818 {
3819 _bfd_error_handler
3820 /* xgettext:c-format */
3821 (_("bfd_mach_o_read_symtab_symbol: "
3822 "symbol \"%s\" specified invalid section %d (max %lu): "
3823 "setting to undefined"),
3824 s->symbol.name, section, mdata->nsects);
3825 }
3826 s->symbol.section = bfd_und_section_ptr;
3827 }
3828 break;
3829 case BFD_MACH_O_N_INDR:
3830 /* FIXME: we don't follow the BFD convention as this indirect symbol
3831 won't be followed by the referenced one. This looks harmless
3832 unless we start using the linker. */
3833 s->symbol.flags |= BSF_INDIRECT;
3834 s->symbol.section = bfd_ind_section_ptr;
3835 s->symbol.value = 0;
3836 break;
3837 default:
3838 _bfd_error_handler
3839 /* xgettext:c-format */
3840 (_("bfd_mach_o_read_symtab_symbol: "
3841 "symbol \"%s\" specified invalid type field 0x%x: "
3842 "setting to undefined"), s->symbol.name, symtype);
3843 s->symbol.section = bfd_und_section_ptr;
3844 break;
3845 }
3846 }
3847
3848 return TRUE;
3849 }
3850
3851 bfd_boolean
3852 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3853 {
3854 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3855 bfd_mach_o_symtab_command *sym = mdata->symtab;
3856
3857 /* Fail if there is no symtab. */
3858 if (sym == NULL)
3859 return FALSE;
3860
3861 /* Success if already loaded. */
3862 if (sym->strtab)
3863 return TRUE;
3864
3865 if (abfd->flags & BFD_IN_MEMORY)
3866 {
3867 struct bfd_in_memory *b;
3868
3869 b = (struct bfd_in_memory *) abfd->iostream;
3870
3871 if ((sym->stroff + sym->strsize) > b->size)
3872 {
3873 bfd_set_error (bfd_error_file_truncated);
3874 return FALSE;
3875 }
3876 sym->strtab = (char *) b->buffer + sym->stroff;
3877 }
3878 else
3879 {
3880 /* See PR 21840 for a reproducer. */
3881 if ((sym->strsize + 1) == 0)
3882 return FALSE;
3883 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3884 if (sym->strtab == NULL)
3885 return FALSE;
3886
3887 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3888 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3889 {
3890 /* PR 17512: file: 10888-1609-0.004. */
3891 bfd_release (abfd, sym->strtab);
3892 sym->strtab = NULL;
3893 bfd_set_error (bfd_error_file_truncated);
3894 return FALSE;
3895 }
3896 /* Zero terminate the string table. */
3897 sym->strtab[sym->strsize] = 0;
3898 }
3899
3900 return TRUE;
3901 }
3902
3903 bfd_boolean
3904 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3905 {
3906 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3907 bfd_mach_o_symtab_command *sym = mdata->symtab;
3908 unsigned long i;
3909
3910 if (sym == NULL || sym->symbols)
3911 /* Return now if there are no symbols or if already loaded. */
3912 return TRUE;
3913
3914 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3915 if (sym->symbols == NULL)
3916 {
3917 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3918 "unable to allocate memory for symbols"));
3919 sym->nsyms = 0;
3920 return FALSE;
3921 }
3922
3923 if (!bfd_mach_o_read_symtab_strtab (abfd))
3924 goto fail;
3925
3926 for (i = 0; i < sym->nsyms; i++)
3927 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3928 goto fail;
3929
3930 return TRUE;
3931
3932 fail:
3933 bfd_release (abfd, sym->symbols);
3934 sym->symbols = NULL;
3935 sym->nsyms = 0;
3936 return FALSE;
3937 }
3938
3939 static const char *
3940 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3941 {
3942 switch ((int) flavour)
3943 {
3944 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3945 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3946 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3947 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3948 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3949 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3950 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3951 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3952 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3953 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3954 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3955 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3956 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3957 default: return "UNKNOWN";
3958 }
3959 }
3960
3961 static const char *
3962 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3963 {
3964 switch ((int) flavour)
3965 {
3966 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3967 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3968 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3969 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3970 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3971 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3972 default: return "UNKNOWN";
3973 }
3974 }
3975
3976 static bfd_boolean
3977 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3978 {
3979 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3980 struct mach_o_str_command_external raw;
3981 unsigned int nameoff;
3982 unsigned int namelen;
3983
3984 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3985 return FALSE;
3986
3987 nameoff = bfd_h_get_32 (abfd, raw.str);
3988
3989 cmd->name_offset = nameoff;
3990 namelen = command->len - nameoff;
3991 nameoff += command->offset;
3992 cmd->name_str = bfd_alloc (abfd, namelen);
3993 if (cmd->name_str == NULL)
3994 return FALSE;
3995 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3996 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3997 return FALSE;
3998 return TRUE;
3999 }
4000
4001 static bfd_boolean
4002 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
4003 {
4004 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4005 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
4006 struct mach_o_dylib_command_external raw;
4007 unsigned int nameoff;
4008 unsigned int namelen;
4009
4010 switch (command->type)
4011 {
4012 case BFD_MACH_O_LC_LOAD_DYLIB:
4013 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4014 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4015 case BFD_MACH_O_LC_ID_DYLIB:
4016 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4017 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4018 break;
4019 default:
4020 BFD_FAIL ();
4021 return FALSE;
4022 }
4023
4024 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4025 return FALSE;
4026
4027 nameoff = bfd_h_get_32 (abfd, raw.name);
4028 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
4029 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
4030 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
4031
4032 cmd->name_offset = command->offset + nameoff;
4033 namelen = command->len - nameoff;
4034 cmd->name_str = bfd_alloc (abfd, namelen);
4035 if (cmd->name_str == NULL)
4036 return FALSE;
4037 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
4038 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
4039 return FALSE;
4040 return TRUE;
4041 }
4042
4043 static bfd_boolean
4044 bfd_mach_o_read_prebound_dylib (bfd *abfd,
4045 bfd_mach_o_load_command *command)
4046 {
4047 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
4048 struct mach_o_prebound_dylib_command_external raw;
4049 unsigned int nameoff;
4050 unsigned int modoff;
4051 unsigned int str_len;
4052 unsigned char *str;
4053
4054 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4055 return FALSE;
4056
4057 nameoff = bfd_h_get_32 (abfd, raw.name);
4058 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
4059 if (nameoff > command->len || modoff > command->len)
4060 return FALSE;
4061
4062 str_len = command->len - sizeof (raw);
4063 str = bfd_alloc (abfd, str_len);
4064 if (str == NULL)
4065 return FALSE;
4066 if (bfd_bread (str, str_len, abfd) != str_len)
4067 return FALSE;
4068
4069 cmd->name_offset = command->offset + nameoff;
4070 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
4071 cmd->linked_modules_offset = command->offset + modoff;
4072
4073 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4074 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4075 return TRUE;
4076 }
4077
4078 static bfd_boolean
4079 bfd_mach_o_read_prebind_cksum (bfd *abfd,
4080 bfd_mach_o_load_command *command)
4081 {
4082 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
4083 struct mach_o_prebind_cksum_command_external raw;
4084
4085 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4086 return FALSE;
4087
4088 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
4089 return TRUE;
4090 }
4091
4092 static bfd_boolean
4093 bfd_mach_o_read_twolevel_hints (bfd *abfd,
4094 bfd_mach_o_load_command *command)
4095 {
4096 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
4097 struct mach_o_twolevel_hints_command_external raw;
4098
4099 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4100 return FALSE;
4101
4102 cmd->offset = bfd_get_32 (abfd, raw.offset);
4103 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
4104 return TRUE;
4105 }
4106
4107 static bfd_boolean
4108 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
4109 {
4110 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
4111 struct mach_o_fvmlib_command_external raw;
4112 unsigned int nameoff;
4113 unsigned int namelen;
4114
4115 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4116 return FALSE;
4117
4118 nameoff = bfd_h_get_32 (abfd, raw.name);
4119 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
4120 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
4121
4122 fvm->name_offset = command->offset + nameoff;
4123 namelen = command->len - nameoff;
4124 fvm->name_str = bfd_alloc (abfd, namelen);
4125 if (fvm->name_str == NULL)
4126 return FALSE;
4127 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
4128 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
4129 return FALSE;
4130 return TRUE;
4131 }
4132
4133 static bfd_boolean
4134 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4135 {
4136 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4137 bfd_mach_o_thread_command *cmd = &command->command.thread;
4138 unsigned int offset;
4139 unsigned int nflavours;
4140 unsigned int i;
4141
4142 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4143 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4144
4145 /* Count the number of threads. */
4146 offset = 8;
4147 nflavours = 0;
4148 while (offset != command->len)
4149 {
4150 struct mach_o_thread_command_external raw;
4151
4152 if (offset >= command->len)
4153 return FALSE;
4154
4155 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4156 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4157 return FALSE;
4158
4159 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
4160 nflavours++;
4161 }
4162
4163 /* Allocate threads. */
4164 cmd->flavours = bfd_alloc2
4165 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4166 if (cmd->flavours == NULL)
4167 return FALSE;
4168 cmd->nflavours = nflavours;
4169
4170 offset = 8;
4171 nflavours = 0;
4172 while (offset != command->len)
4173 {
4174 struct mach_o_thread_command_external raw;
4175
4176 if (offset >= command->len)
4177 return FALSE;
4178
4179 if (nflavours >= cmd->nflavours)
4180 return FALSE;
4181
4182 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4183 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4184 return FALSE;
4185
4186 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4187 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4188 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4189 offset += cmd->flavours[nflavours].size + sizeof (raw);
4190 nflavours++;
4191 }
4192
4193 for (i = 0; i < nflavours; i++)
4194 {
4195 asection *bfdsec;
4196 unsigned int snamelen;
4197 char *sname;
4198 const char *flavourstr;
4199 const char *prefix = "LC_THREAD";
4200 unsigned int j = 0;
4201
4202 switch (mdata->header.cputype)
4203 {
4204 case BFD_MACH_O_CPU_TYPE_POWERPC:
4205 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4206 flavourstr =
4207 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4208 break;
4209 case BFD_MACH_O_CPU_TYPE_I386:
4210 case BFD_MACH_O_CPU_TYPE_X86_64:
4211 flavourstr =
4212 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4213 break;
4214 default:
4215 flavourstr = "UNKNOWN_ARCHITECTURE";
4216 break;
4217 }
4218
4219 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4220 sname = bfd_alloc (abfd, snamelen);
4221 if (sname == NULL)
4222 return FALSE;
4223
4224 for (;;)
4225 {
4226 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4227 if (bfd_get_section_by_name (abfd, sname) == NULL)
4228 break;
4229 j++;
4230 }
4231
4232 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4233
4234 bfdsec->vma = 0;
4235 bfdsec->lma = 0;
4236 bfdsec->size = cmd->flavours[i].size;
4237 bfdsec->filepos = cmd->flavours[i].offset;
4238 bfdsec->alignment_power = 0x0;
4239
4240 cmd->section = bfdsec;
4241 }
4242
4243 return TRUE;
4244 }
4245
4246 static bfd_boolean
4247 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4248 {
4249 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4250 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4251
4252 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4253
4254 {
4255 struct mach_o_dysymtab_command_external raw;
4256
4257 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4258 return FALSE;
4259
4260 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4261 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4262 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4263 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4264 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4265 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4266 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4267 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4268 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4269 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4270 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4271 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4272 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4273 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4274 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4275 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4276 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4277 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4278 }
4279
4280 if (cmd->nmodtab != 0)
4281 {
4282 unsigned int i;
4283 int wide = bfd_mach_o_wide_p (abfd);
4284 unsigned int module_len = wide ? 56 : 52;
4285
4286 cmd->dylib_module =
4287 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4288 if (cmd->dylib_module == NULL)
4289 return FALSE;
4290
4291 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4292 return FALSE;
4293
4294 for (i = 0; i < cmd->nmodtab; i++)
4295 {
4296 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4297 unsigned long v;
4298 unsigned char buf[56];
4299
4300 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4301 return FALSE;
4302
4303 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4304 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4305 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4306 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4307 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4308 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4309 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4310 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4311 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4312 v = bfd_h_get_32 (abfd, buf +36);
4313 module->iinit = v & 0xffff;
4314 module->iterm = (v >> 16) & 0xffff;
4315 v = bfd_h_get_32 (abfd, buf + 40);
4316 module->ninit = v & 0xffff;
4317 module->nterm = (v >> 16) & 0xffff;
4318 if (wide)
4319 {
4320 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4321 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4322 }
4323 else
4324 {
4325 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4326 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4327 }
4328 }
4329 }
4330
4331 if (cmd->ntoc != 0)
4332 {
4333 unsigned long i;
4334
4335 cmd->dylib_toc = bfd_alloc2
4336 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4337 if (cmd->dylib_toc == NULL)
4338 return FALSE;
4339
4340 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4341 return FALSE;
4342
4343 for (i = 0; i < cmd->ntoc; i++)
4344 {
4345 struct mach_o_dylib_table_of_contents_external raw;
4346 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4347
4348 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4349 return FALSE;
4350
4351 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4352 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4353 }
4354 }
4355
4356 if (cmd->nindirectsyms != 0)
4357 {
4358 unsigned int i;
4359
4360 cmd->indirect_syms = bfd_alloc2
4361 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4362 if (cmd->indirect_syms == NULL)
4363 return FALSE;
4364
4365 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4366 return FALSE;
4367
4368 for (i = 0; i < cmd->nindirectsyms; i++)
4369 {
4370 unsigned char raw[4];
4371 unsigned int *is = &cmd->indirect_syms[i];
4372
4373 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4374 return FALSE;
4375
4376 *is = bfd_h_get_32 (abfd, raw);
4377 }
4378 }
4379
4380 if (cmd->nextrefsyms != 0)
4381 {
4382 unsigned long v;
4383 unsigned int i;
4384
4385 cmd->ext_refs = bfd_alloc2
4386 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4387 if (cmd->ext_refs == NULL)
4388 return FALSE;
4389
4390 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4391 return FALSE;
4392
4393 for (i = 0; i < cmd->nextrefsyms; i++)
4394 {
4395 unsigned char raw[4];
4396 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4397
4398 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4399 return FALSE;
4400
4401 /* Fields isym and flags are written as bit-fields, thus we need
4402 a specific processing for endianness. */
4403 v = bfd_h_get_32 (abfd, raw);
4404 if (bfd_big_endian (abfd))
4405 {
4406 ref->isym = (v >> 8) & 0xffffff;
4407 ref->flags = v & 0xff;
4408 }
4409 else
4410 {
4411 ref->isym = v & 0xffffff;
4412 ref->flags = (v >> 24) & 0xff;
4413 }
4414 }
4415 }
4416
4417 if (mdata->dysymtab)
4418 return FALSE;
4419 mdata->dysymtab = cmd;
4420
4421 return TRUE;
4422 }
4423
4424 static bfd_boolean
4425 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4426 {
4427 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4428 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4429 struct mach_o_symtab_command_external raw;
4430
4431 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4432
4433 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4434 return FALSE;
4435
4436 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4437 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4438 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4439 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4440 symtab->symbols = NULL;
4441 symtab->strtab = NULL;
4442
4443 if (symtab->nsyms != 0)
4444 abfd->flags |= HAS_SYMS;
4445
4446 if (mdata->symtab)
4447 return FALSE;
4448 mdata->symtab = symtab;
4449 return TRUE;
4450 }
4451
4452 static bfd_boolean
4453 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4454 {
4455 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4456
4457 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4458
4459 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4460 return FALSE;
4461
4462 return TRUE;
4463 }
4464
4465 static bfd_boolean
4466 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4467 {
4468 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4469 struct mach_o_linkedit_data_command_external raw;
4470
4471 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4472 return FALSE;
4473
4474 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4475 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4476 return TRUE;
4477 }
4478
4479 static bfd_boolean
4480 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4481 {
4482 bfd_mach_o_str_command *cmd = &command->command.str;
4483 struct mach_o_str_command_external raw;
4484 unsigned long off;
4485
4486 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4487 return FALSE;
4488
4489 off = bfd_get_32 (abfd, raw.str);
4490 cmd->stroff = command->offset + off;
4491 cmd->str_len = command->len - off;
4492 cmd->str = bfd_alloc (abfd, cmd->str_len);
4493 if (cmd->str == NULL)
4494 return FALSE;
4495 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4496 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4497 return FALSE;
4498 return TRUE;
4499 }
4500
4501 static unsigned char *
4502 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4503 {
4504 unsigned char *buf;
4505
4506 buf = bfd_alloc (abfd, size);
4507 if (buf == NULL)
4508 return NULL;
4509 if (bfd_seek (abfd, off, SEEK_SET) != 0
4510 || bfd_bread (buf, size, abfd) != size)
4511 return NULL;
4512 return buf;
4513 }
4514
4515 static bfd_boolean
4516 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4517 {
4518 /* Read rebase content. */
4519 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4520 {
4521 cmd->rebase_content =
4522 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4523 if (cmd->rebase_content == NULL)
4524 return FALSE;
4525 }
4526
4527 /* Read bind content. */
4528 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4529 {
4530 cmd->bind_content =
4531 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4532 if (cmd->bind_content == NULL)
4533 return FALSE;
4534 }
4535
4536 /* Read weak bind content. */
4537 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4538 {
4539 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4540 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4541 if (cmd->weak_bind_content == NULL)
4542 return FALSE;
4543 }
4544
4545 /* Read lazy bind content. */
4546 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4547 {
4548 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4549 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4550 if (cmd->lazy_bind_content == NULL)
4551 return FALSE;
4552 }
4553
4554 /* Read export content. */
4555 if (cmd->export_content == NULL && cmd->export_size != 0)
4556 {
4557 cmd->export_content = bfd_mach_o_alloc_and_read
4558 (abfd, cmd->export_off, cmd->export_size);
4559 if (cmd->export_content == NULL)
4560 return FALSE;
4561 }
4562
4563 return TRUE;
4564 }
4565
4566 static bfd_boolean
4567 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4568 {
4569 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4570 struct mach_o_dyld_info_command_external raw;
4571
4572 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4573 return FALSE;
4574
4575 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4576 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4577 cmd->rebase_content = NULL;
4578 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4579 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4580 cmd->bind_content = NULL;
4581 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4582 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4583 cmd->weak_bind_content = NULL;
4584 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4585 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4586 cmd->lazy_bind_content = NULL;
4587 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4588 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4589 cmd->export_content = NULL;
4590 return TRUE;
4591 }
4592
4593 static bfd_boolean
4594 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4595 {
4596 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4597 struct mach_o_version_min_command_external raw;
4598 unsigned int ver;
4599
4600 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4601 return FALSE;
4602
4603 ver = bfd_get_32 (abfd, raw.version);
4604 cmd->rel = ver >> 16;
4605 cmd->maj = ver >> 8;
4606 cmd->min = ver;
4607 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4608 return TRUE;
4609 }
4610
4611 static bfd_boolean
4612 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4613 {
4614 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4615 struct mach_o_encryption_info_command_external raw;
4616
4617 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4618 return FALSE;
4619
4620 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4621 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4622 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4623 return TRUE;
4624 }
4625
4626 static bfd_boolean
4627 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4628 {
4629 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4630 struct mach_o_encryption_info_64_command_external raw;
4631
4632 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4633 return FALSE;
4634
4635 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4636 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4637 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4638 return TRUE;
4639 }
4640
4641 static bfd_boolean
4642 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4643 {
4644 bfd_mach_o_main_command *cmd = &command->command.main;
4645 struct mach_o_entry_point_command_external raw;
4646
4647 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4648 return FALSE;
4649
4650 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4651 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4652 return TRUE;
4653 }
4654
4655 static bfd_boolean
4656 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4657 {
4658 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4659 struct mach_o_source_version_command_external raw;
4660 bfd_uint64_t ver;
4661
4662 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4663 return FALSE;
4664
4665 ver = bfd_get_64 (abfd, raw.version);
4666 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4667 generates warnings) in case of the host doesn't support 64 bit
4668 integers. */
4669 cmd->e = ver & 0x3ff;
4670 ver >>= 10;
4671 cmd->d = ver & 0x3ff;
4672 ver >>= 10;
4673 cmd->c = ver & 0x3ff;
4674 ver >>= 10;
4675 cmd->b = ver & 0x3ff;
4676 ver >>= 10;
4677 cmd->a = ver & 0xffffff;
4678 return TRUE;
4679 }
4680
4681 static bfd_boolean
4682 bfd_mach_o_read_segment (bfd *abfd,
4683 bfd_mach_o_load_command *command,
4684 unsigned int wide)
4685 {
4686 bfd_mach_o_segment_command *seg = &command->command.segment;
4687 unsigned long i;
4688
4689 if (wide)
4690 {
4691 struct mach_o_segment_command_64_external raw;
4692
4693 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4694
4695 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4696 return FALSE;
4697
4698 memcpy (seg->segname, raw.segname, 16);
4699 seg->segname[16] = '\0';
4700
4701 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4702 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4703 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4704 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4705 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4706 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4707 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4708 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4709 }
4710 else
4711 {
4712 struct mach_o_segment_command_32_external raw;
4713
4714 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4715
4716 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4717 return FALSE;
4718
4719 memcpy (seg->segname, raw.segname, 16);
4720 seg->segname[16] = '\0';
4721
4722 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4723 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4724 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4725 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4726 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4727 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4728 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4729 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4730 }
4731 seg->sect_head = NULL;
4732 seg->sect_tail = NULL;
4733
4734 for (i = 0; i < seg->nsects; i++)
4735 {
4736 asection *sec;
4737
4738 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4739 if (sec == NULL)
4740 return FALSE;
4741
4742 bfd_mach_o_append_section_to_segment
4743 (seg, bfd_mach_o_get_mach_o_section (sec));
4744 }
4745
4746 return TRUE;
4747 }
4748
4749 static bfd_boolean
4750 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4751 {
4752 return bfd_mach_o_read_segment (abfd, command, 0);
4753 }
4754
4755 static bfd_boolean
4756 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4757 {
4758 return bfd_mach_o_read_segment (abfd, command, 1);
4759 }
4760
4761 static bfd_boolean
4762 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4763 {
4764 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4765 struct mach_o_load_command_external raw;
4766 unsigned int cmd;
4767
4768 /* Read command type and length. */
4769 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4770 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4771 return FALSE;
4772
4773 cmd = bfd_h_get_32 (abfd, raw.cmd);
4774 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4775 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4776 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4777
4778 switch (command->type)
4779 {
4780 case BFD_MACH_O_LC_SEGMENT:
4781 if (!bfd_mach_o_read_segment_32 (abfd, command))
4782 return FALSE;
4783 break;
4784 case BFD_MACH_O_LC_SEGMENT_64:
4785 if (!bfd_mach_o_read_segment_64 (abfd, command))
4786 return FALSE;
4787 break;
4788 case BFD_MACH_O_LC_SYMTAB:
4789 if (!bfd_mach_o_read_symtab (abfd, command))
4790 return FALSE;
4791 break;
4792 case BFD_MACH_O_LC_SYMSEG:
4793 break;
4794 case BFD_MACH_O_LC_THREAD:
4795 case BFD_MACH_O_LC_UNIXTHREAD:
4796 if (!bfd_mach_o_read_thread (abfd, command))
4797 return FALSE;
4798 break;
4799 case BFD_MACH_O_LC_LOAD_DYLINKER:
4800 case BFD_MACH_O_LC_ID_DYLINKER:
4801 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4802 if (!bfd_mach_o_read_dylinker (abfd, command))
4803 return FALSE;
4804 break;
4805 case BFD_MACH_O_LC_LOAD_DYLIB:
4806 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4807 case BFD_MACH_O_LC_ID_DYLIB:
4808 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4809 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4810 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4811 if (!bfd_mach_o_read_dylib (abfd, command))
4812 return FALSE;
4813 break;
4814 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4815 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4816 return FALSE;
4817 break;
4818 case BFD_MACH_O_LC_LOADFVMLIB:
4819 case BFD_MACH_O_LC_IDFVMLIB:
4820 if (!bfd_mach_o_read_fvmlib (abfd, command))
4821 return FALSE;
4822 break;
4823 case BFD_MACH_O_LC_IDENT:
4824 case BFD_MACH_O_LC_FVMFILE:
4825 case BFD_MACH_O_LC_PREPAGE:
4826 case BFD_MACH_O_LC_ROUTINES:
4827 case BFD_MACH_O_LC_ROUTINES_64:
4828 break;
4829 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4830 case BFD_MACH_O_LC_SUB_UMBRELLA:
4831 case BFD_MACH_O_LC_SUB_LIBRARY:
4832 case BFD_MACH_O_LC_SUB_CLIENT:
4833 case BFD_MACH_O_LC_RPATH:
4834 if (!bfd_mach_o_read_str (abfd, command))
4835 return FALSE;
4836 break;
4837 case BFD_MACH_O_LC_DYSYMTAB:
4838 if (!bfd_mach_o_read_dysymtab (abfd, command))
4839 return FALSE;
4840 break;
4841 case BFD_MACH_O_LC_PREBIND_CKSUM:
4842 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4843 return FALSE;
4844 break;
4845 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4846 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4847 return FALSE;
4848 break;
4849 case BFD_MACH_O_LC_UUID:
4850 if (!bfd_mach_o_read_uuid (abfd, command))
4851 return FALSE;
4852 break;
4853 case BFD_MACH_O_LC_CODE_SIGNATURE:
4854 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4855 case BFD_MACH_O_LC_FUNCTION_STARTS:
4856 case BFD_MACH_O_LC_DATA_IN_CODE:
4857 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4858 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4859 if (!bfd_mach_o_read_linkedit (abfd, command))
4860 return FALSE;
4861 break;
4862 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4863 if (!bfd_mach_o_read_encryption_info (abfd, command))
4864 return FALSE;
4865 break;
4866 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4867 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4868 return FALSE;
4869 break;
4870 case BFD_MACH_O_LC_DYLD_INFO:
4871 if (!bfd_mach_o_read_dyld_info (abfd, command))
4872 return FALSE;
4873 break;
4874 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4875 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4876 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4877 if (!bfd_mach_o_read_version_min (abfd, command))
4878 return FALSE;
4879 break;
4880 case BFD_MACH_O_LC_MAIN:
4881 if (!bfd_mach_o_read_main (abfd, command))
4882 return FALSE;
4883 break;
4884 case BFD_MACH_O_LC_SOURCE_VERSION:
4885 if (!bfd_mach_o_read_source_version (abfd, command))
4886 return FALSE;
4887 break;
4888 default:
4889 command->len = 0;
4890 _bfd_error_handler (_("%pB: unknown load command %#x"),
4891 abfd, command->type);
4892 return FALSE;
4893 }
4894
4895 return TRUE;
4896 }
4897
4898 static void
4899 bfd_mach_o_flatten_sections (bfd *abfd)
4900 {
4901 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4902 bfd_mach_o_load_command *cmd;
4903 long csect = 0;
4904
4905 /* Count total number of sections. */
4906 mdata->nsects = 0;
4907
4908 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4909 {
4910 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4911 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4912 {
4913 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4914
4915 mdata->nsects += seg->nsects;
4916 }
4917 }
4918
4919 /* Allocate sections array. */
4920 mdata->sections = bfd_alloc2 (abfd,
4921 mdata->nsects, sizeof (bfd_mach_o_section *));
4922
4923 /* Fill the array. */
4924 csect = 0;
4925
4926 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4927 {
4928 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4929 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4930 {
4931 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4932 bfd_mach_o_section *sec;
4933
4934 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4935
4936 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4937 mdata->sections[csect++] = sec;
4938 }
4939 }
4940 }
4941
4942 static bfd_boolean
4943 bfd_mach_o_scan_start_address (bfd *abfd)
4944 {
4945 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4946 bfd_mach_o_thread_command *thr = NULL;
4947 bfd_mach_o_load_command *cmd;
4948 unsigned long i;
4949
4950 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4951 if (cmd->type == BFD_MACH_O_LC_THREAD
4952 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4953 {
4954 thr = &cmd->command.thread;
4955 break;
4956 }
4957 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4958 {
4959 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4960 bfd_mach_o_section *text_sect = mdata->sections[0];
4961
4962 if (text_sect)
4963 {
4964 abfd->start_address = main_cmd->entryoff
4965 + (text_sect->addr - text_sect->offset);
4966 return TRUE;
4967 }
4968 }
4969
4970 /* An object file has no start address, so do not fail if not found. */
4971 if (thr == NULL)
4972 return TRUE;
4973
4974 /* FIXME: create a subtarget hook ? */
4975 for (i = 0; i < thr->nflavours; i++)
4976 {
4977 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4978 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4979 {
4980 unsigned char buf[4];
4981
4982 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4983 || bfd_bread (buf, 4, abfd) != 4)
4984 return FALSE;
4985
4986 abfd->start_address = bfd_h_get_32 (abfd, buf);
4987 }
4988 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4989 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4990 {
4991 unsigned char buf[4];
4992
4993 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4994 || bfd_bread (buf, 4, abfd) != 4)
4995 return FALSE;
4996
4997 abfd->start_address = bfd_h_get_32 (abfd, buf);
4998 }
4999 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
5000 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
5001 {
5002 unsigned char buf[8];
5003
5004 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5005 || bfd_bread (buf, 8, abfd) != 8)
5006 return FALSE;
5007
5008 abfd->start_address = bfd_h_get_64 (abfd, buf);
5009 }
5010 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
5011 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
5012 {
5013 unsigned char buf[8];
5014
5015 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
5016 || bfd_bread (buf, 8, abfd) != 8)
5017 return FALSE;
5018
5019 abfd->start_address = bfd_h_get_64 (abfd, buf);
5020 }
5021 }
5022
5023 return TRUE;
5024 }
5025
5026 bfd_boolean
5027 bfd_mach_o_set_arch_mach (bfd *abfd,
5028 enum bfd_architecture arch,
5029 unsigned long machine)
5030 {
5031 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5032
5033 /* If this isn't the right architecture for this backend, and this
5034 isn't the generic backend, fail. */
5035 if (arch != bed->arch
5036 && arch != bfd_arch_unknown
5037 && bed->arch != bfd_arch_unknown)
5038 return FALSE;
5039
5040 return bfd_default_set_arch_mach (abfd, arch, machine);
5041 }
5042
5043 static bfd_boolean
5044 bfd_mach_o_scan (bfd *abfd,
5045 bfd_mach_o_header *header,
5046 bfd_mach_o_data_struct *mdata)
5047 {
5048 unsigned int i;
5049 enum bfd_architecture cputype;
5050 unsigned long cpusubtype;
5051 unsigned int hdrsize;
5052
5053 hdrsize = mach_o_wide_p (header) ?
5054 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
5055
5056 mdata->header = *header;
5057
5058 abfd->flags = abfd->flags & BFD_IN_MEMORY;
5059 switch (header->filetype)
5060 {
5061 case BFD_MACH_O_MH_OBJECT:
5062 abfd->flags |= HAS_RELOC;
5063 break;
5064 case BFD_MACH_O_MH_EXECUTE:
5065 abfd->flags |= EXEC_P;
5066 break;
5067 case BFD_MACH_O_MH_DYLIB:
5068 case BFD_MACH_O_MH_BUNDLE:
5069 abfd->flags |= DYNAMIC;
5070 break;
5071 }
5072
5073 abfd->tdata.mach_o_data = mdata;
5074
5075 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
5076 &cputype, &cpusubtype);
5077 if (cputype == bfd_arch_unknown)
5078 {
5079 _bfd_error_handler
5080 /* xgettext:c-format */
5081 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
5082 header->cputype, header->cpusubtype);
5083 return FALSE;
5084 }
5085
5086 bfd_set_arch_mach (abfd, cputype, cpusubtype);
5087
5088 if (header->ncmds != 0)
5089 {
5090 bfd_mach_o_load_command *cmd;
5091
5092 mdata->first_command = NULL;
5093 mdata->last_command = NULL;
5094
5095 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
5096 if (cmd == NULL)
5097 return FALSE;
5098
5099 for (i = 0; i < header->ncmds; i++)
5100 {
5101 bfd_mach_o_load_command *cur = &cmd[i];
5102
5103 bfd_mach_o_append_command (abfd, cur);
5104
5105 if (i == 0)
5106 cur->offset = hdrsize;
5107 else
5108 {
5109 bfd_mach_o_load_command *prev = &cmd[i - 1];
5110 cur->offset = prev->offset + prev->len;
5111 }
5112
5113 if (!bfd_mach_o_read_command (abfd, cur))
5114 return FALSE;
5115 }
5116 }
5117
5118 /* Sections should be flatten before scanning start address. */
5119 bfd_mach_o_flatten_sections (abfd);
5120 if (!bfd_mach_o_scan_start_address (abfd))
5121 return FALSE;
5122
5123 return TRUE;
5124 }
5125
5126 bfd_boolean
5127 bfd_mach_o_mkobject_init (bfd *abfd)
5128 {
5129 bfd_mach_o_data_struct *mdata = NULL;
5130
5131 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5132 if (mdata == NULL)
5133 return FALSE;
5134 abfd->tdata.mach_o_data = mdata;
5135
5136 mdata->header.magic = 0;
5137 mdata->header.cputype = 0;
5138 mdata->header.cpusubtype = 0;
5139 mdata->header.filetype = 0;
5140 mdata->header.ncmds = 0;
5141 mdata->header.sizeofcmds = 0;
5142 mdata->header.flags = 0;
5143 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5144 mdata->first_command = NULL;
5145 mdata->last_command = NULL;
5146 mdata->nsects = 0;
5147 mdata->sections = NULL;
5148 mdata->dyn_reloc_cache = NULL;
5149
5150 return TRUE;
5151 }
5152
5153 static bfd_boolean
5154 bfd_mach_o_gen_mkobject (bfd *abfd)
5155 {
5156 bfd_mach_o_data_struct *mdata;
5157
5158 if (!bfd_mach_o_mkobject_init (abfd))
5159 return FALSE;
5160
5161 mdata = bfd_mach_o_get_data (abfd);
5162 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5163 mdata->header.cputype = 0;
5164 mdata->header.cpusubtype = 0;
5165 mdata->header.byteorder = abfd->xvec->byteorder;
5166 mdata->header.version = 1;
5167
5168 return TRUE;
5169 }
5170
5171 const bfd_target *
5172 bfd_mach_o_header_p (bfd *abfd,
5173 file_ptr hdr_off,
5174 bfd_mach_o_filetype filetype,
5175 bfd_mach_o_cpu_type cputype)
5176 {
5177 bfd_mach_o_header header;
5178 bfd_mach_o_data_struct *mdata;
5179
5180 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5181 goto wrong;
5182
5183 if (! (header.byteorder == BFD_ENDIAN_BIG
5184 || header.byteorder == BFD_ENDIAN_LITTLE))
5185 {
5186 _bfd_error_handler (_("unknown header byte-order value %#x"),
5187 header.byteorder);
5188 goto wrong;
5189 }
5190
5191 if (! ((header.byteorder == BFD_ENDIAN_BIG
5192 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5193 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5194 || (header.byteorder == BFD_ENDIAN_LITTLE
5195 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5196 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5197 goto wrong;
5198
5199 /* Check cputype and filetype.
5200 In case of wildcard, do not accept magics that are handled by existing
5201 targets. */
5202 if (cputype)
5203 {
5204 if (header.cputype != cputype)
5205 goto wrong;
5206 }
5207 else
5208 {
5209 #ifndef BFD64
5210 /* Do not recognize 64 architectures if not configured for 64bit targets.
5211 This could happen only for generic targets. */
5212 if (mach_o_wide_p (&header))
5213 goto wrong;
5214 #endif
5215 }
5216
5217 if (filetype)
5218 {
5219 if (header.filetype != filetype)
5220 goto wrong;
5221 }
5222 else
5223 {
5224 switch (header.filetype)
5225 {
5226 case BFD_MACH_O_MH_CORE:
5227 /* Handled by core_p */
5228 goto wrong;
5229 default:
5230 break;
5231 }
5232 }
5233
5234 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5235 if (mdata == NULL)
5236 goto fail;
5237 mdata->hdr_offset = hdr_off;
5238
5239 if (!bfd_mach_o_scan (abfd, &header, mdata))
5240 goto wrong;
5241
5242 return abfd->xvec;
5243
5244 wrong:
5245 bfd_set_error (bfd_error_wrong_format);
5246
5247 fail:
5248 return NULL;
5249 }
5250
5251 static const bfd_target *
5252 bfd_mach_o_gen_object_p (bfd *abfd)
5253 {
5254 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5255 }
5256
5257 static const bfd_target *
5258 bfd_mach_o_gen_core_p (bfd *abfd)
5259 {
5260 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5261 }
5262
5263 /* Return the base address of ABFD, ie the address at which the image is
5264 mapped. The possible initial pagezero is ignored. */
5265
5266 bfd_vma
5267 bfd_mach_o_get_base_address (bfd *abfd)
5268 {
5269 bfd_mach_o_data_struct *mdata;
5270 bfd_mach_o_load_command *cmd;
5271
5272 /* Check for Mach-O. */
5273 if (!bfd_mach_o_valid (abfd))
5274 return 0;
5275 mdata = bfd_mach_o_get_data (abfd);
5276
5277 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5278 {
5279 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5280 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5281 {
5282 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5283
5284 if (segcmd->initprot != 0)
5285 return segcmd->vmaddr;
5286 }
5287 }
5288 return 0;
5289 }
5290
5291 typedef struct mach_o_fat_archentry
5292 {
5293 unsigned long cputype;
5294 unsigned long cpusubtype;
5295 unsigned long offset;
5296 unsigned long size;
5297 unsigned long align;
5298 } mach_o_fat_archentry;
5299
5300 typedef struct mach_o_fat_data_struct
5301 {
5302 unsigned long magic;
5303 unsigned long nfat_arch;
5304 mach_o_fat_archentry *archentries;
5305 } mach_o_fat_data_struct;
5306
5307 const bfd_target *
5308 bfd_mach_o_fat_archive_p (bfd *abfd)
5309 {
5310 mach_o_fat_data_struct *adata = NULL;
5311 struct mach_o_fat_header_external hdr;
5312 unsigned long i;
5313
5314 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5315 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5316 goto error;
5317
5318 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5319 if (adata == NULL)
5320 goto error;
5321
5322 adata->magic = bfd_getb32 (hdr.magic);
5323 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5324 if (adata->magic != 0xcafebabe)
5325 goto error;
5326 /* Avoid matching Java bytecode files, which have the same magic number.
5327 In the Java bytecode file format this field contains the JVM version,
5328 which starts at 43.0. */
5329 if (adata->nfat_arch > 30)
5330 goto error;
5331
5332 adata->archentries =
5333 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5334 if (adata->archentries == NULL)
5335 goto error;
5336
5337 for (i = 0; i < adata->nfat_arch; i++)
5338 {
5339 struct mach_o_fat_arch_external arch;
5340 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5341 goto error;
5342 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5343 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5344 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5345 adata->archentries[i].size = bfd_getb32 (arch.size);
5346 adata->archentries[i].align = bfd_getb32 (arch.align);
5347 }
5348
5349 abfd->tdata.mach_o_fat_data = adata;
5350
5351 return abfd->xvec;
5352
5353 error:
5354 if (adata != NULL)
5355 bfd_release (abfd, adata);
5356 bfd_set_error (bfd_error_wrong_format);
5357 return NULL;
5358 }
5359
5360 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5361 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5362 Set arelt_data and origin fields too. */
5363
5364 static void
5365 bfd_mach_o_fat_member_init (bfd *abfd,
5366 enum bfd_architecture arch_type,
5367 unsigned long arch_subtype,
5368 mach_o_fat_archentry *entry)
5369 {
5370 struct areltdata *areltdata;
5371 /* Create the member filename. Use ARCH_NAME. */
5372 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5373
5374 if (ap)
5375 {
5376 /* Use the architecture name if known. */
5377 abfd->filename = xstrdup (ap->printable_name);
5378 }
5379 else
5380 {
5381 /* Forge a uniq id. */
5382 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5383 char *name = xmalloc (namelen);
5384 snprintf (name, namelen, "0x%lx-0x%lx",
5385 entry->cputype, entry->cpusubtype);
5386 abfd->filename = name;
5387 }
5388
5389 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5390 areltdata->parsed_size = entry->size;
5391 abfd->arelt_data = areltdata;
5392 abfd->iostream = NULL;
5393 abfd->origin = entry->offset;
5394 }
5395
5396 bfd *
5397 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5398 {
5399 mach_o_fat_data_struct *adata;
5400 mach_o_fat_archentry *entry = NULL;
5401 unsigned long i;
5402 bfd *nbfd;
5403 enum bfd_architecture arch_type;
5404 unsigned long arch_subtype;
5405
5406 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5407 BFD_ASSERT (adata != NULL);
5408
5409 /* Find index of previous entry. */
5410 if (prev == NULL)
5411 {
5412 /* Start at first one. */
5413 i = 0;
5414 }
5415 else
5416 {
5417 /* Find index of PREV. */
5418 for (i = 0; i < adata->nfat_arch; i++)
5419 {
5420 if (adata->archentries[i].offset == prev->origin)
5421 break;
5422 }
5423
5424 if (i == adata->nfat_arch)
5425 {
5426 /* Not found. */
5427 bfd_set_error (bfd_error_bad_value);
5428 return NULL;
5429 }
5430
5431 /* Get next entry. */
5432 i++;
5433 }
5434
5435 if (i >= adata->nfat_arch)
5436 {
5437 bfd_set_error (bfd_error_no_more_archived_files);
5438 return NULL;
5439 }
5440
5441 entry = &adata->archentries[i];
5442 nbfd = _bfd_new_bfd_contained_in (archive);
5443 if (nbfd == NULL)
5444 return NULL;
5445
5446 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5447 &arch_type, &arch_subtype);
5448
5449 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5450
5451 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5452
5453 return nbfd;
5454 }
5455
5456 /* Analogous to stat call. */
5457
5458 static int
5459 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5460 {
5461 if (abfd->arelt_data == NULL)
5462 {
5463 bfd_set_error (bfd_error_invalid_operation);
5464 return -1;
5465 }
5466
5467 buf->st_mtime = 0;
5468 buf->st_uid = 0;
5469 buf->st_gid = 0;
5470 buf->st_mode = 0644;
5471 buf->st_size = arelt_size (abfd);
5472
5473 return 0;
5474 }
5475
5476 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5477 If ABFD is a fat image containing a member that corresponds to FORMAT
5478 and ARCH, returns it.
5479 In other case, returns NULL.
5480 This function allows transparent uses of fat images. */
5481
5482 bfd *
5483 bfd_mach_o_fat_extract (bfd *abfd,
5484 bfd_format format,
5485 const bfd_arch_info_type *arch)
5486 {
5487 bfd *res;
5488 mach_o_fat_data_struct *adata;
5489 unsigned int i;
5490
5491 if (bfd_check_format (abfd, format))
5492 {
5493 if (bfd_get_arch_info (abfd) == arch)
5494 return abfd;
5495 return NULL;
5496 }
5497 if (!bfd_check_format (abfd, bfd_archive)
5498 || abfd->xvec != &mach_o_fat_vec)
5499 return NULL;
5500
5501 /* This is a Mach-O fat image. */
5502 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5503 BFD_ASSERT (adata != NULL);
5504
5505 for (i = 0; i < adata->nfat_arch; i++)
5506 {
5507 struct mach_o_fat_archentry *e = &adata->archentries[i];
5508 enum bfd_architecture cpu_type;
5509 unsigned long cpu_subtype;
5510
5511 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5512 &cpu_type, &cpu_subtype);
5513 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5514 continue;
5515
5516 /* The architecture is found. */
5517 res = _bfd_new_bfd_contained_in (abfd);
5518 if (res == NULL)
5519 return NULL;
5520
5521 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5522
5523 if (bfd_check_format (res, format))
5524 {
5525 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5526 return res;
5527 }
5528 bfd_close (res);
5529 return NULL;
5530 }
5531
5532 return NULL;
5533 }
5534
5535 static bfd_boolean
5536 bfd_mach_o_fat_close_and_cleanup (bfd *abfd)
5537 {
5538 _bfd_unlink_from_archive_parent (abfd);
5539 return TRUE;
5540 }
5541
5542 int
5543 bfd_mach_o_lookup_command (bfd *abfd,
5544 bfd_mach_o_load_command_type type,
5545 bfd_mach_o_load_command **mcommand)
5546 {
5547 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5548 struct bfd_mach_o_load_command *cmd;
5549 unsigned int num;
5550
5551 BFD_ASSERT (mdata != NULL);
5552 BFD_ASSERT (mcommand != NULL);
5553
5554 num = 0;
5555 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5556 {
5557 if (cmd->type != type)
5558 continue;
5559
5560 if (num == 0)
5561 *mcommand = cmd;
5562 num++;
5563 }
5564
5565 return num;
5566 }
5567
5568 unsigned long
5569 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5570 {
5571 switch (type)
5572 {
5573 case BFD_MACH_O_CPU_TYPE_MC680x0:
5574 return 0x04000000;
5575 case BFD_MACH_O_CPU_TYPE_POWERPC:
5576 return 0xc0000000;
5577 case BFD_MACH_O_CPU_TYPE_I386:
5578 return 0xc0000000;
5579 case BFD_MACH_O_CPU_TYPE_SPARC:
5580 return 0xf0000000;
5581 case BFD_MACH_O_CPU_TYPE_HPPA:
5582 return 0xc0000000 - 0x04000000;
5583 default:
5584 return 0;
5585 }
5586 }
5587
5588 /* The following two tables should be kept, as far as possible, in order of
5589 most frequently used entries to optimize their use from gas. */
5590
5591 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5592 {
5593 { "regular", BFD_MACH_O_S_REGULAR},
5594 { "coalesced", BFD_MACH_O_S_COALESCED},
5595 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5596 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5597 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5598 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5599 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5600 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5601 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5602 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5603 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5604 { "interposing", BFD_MACH_O_S_INTERPOSING},
5605 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5606 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5607 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5608 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5609 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5610 { NULL, 0}
5611 };
5612
5613 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5614 {
5615 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5616 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5617 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5618 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5619 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5620 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5621 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5622 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5623 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5624 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5625 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5626 { NULL, 0}
5627 };
5628
5629 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5630
5631 unsigned int
5632 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5633 {
5634 const bfd_mach_o_xlat_name *x;
5635 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5636
5637 for (x = bfd_mach_o_section_type_name; x->name; x++)
5638 if (strcmp (x->name, name) == 0)
5639 {
5640 /* We found it... does the target support it? */
5641 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5642 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5643 return x->val; /* OK. */
5644 else
5645 break; /* Not supported. */
5646 }
5647 /* Maximum section ID = 0xff. */
5648 return 256;
5649 }
5650
5651 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5652
5653 unsigned int
5654 bfd_mach_o_get_section_attribute_from_name (const char *name)
5655 {
5656 const bfd_mach_o_xlat_name *x;
5657
5658 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5659 if (strcmp (x->name, name) == 0)
5660 return x->val;
5661 return (unsigned int)-1;
5662 }
5663
5664 int
5665 bfd_mach_o_core_fetch_environment (bfd *abfd,
5666 unsigned char **rbuf,
5667 unsigned int *rlen)
5668 {
5669 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5670 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5671 bfd_mach_o_load_command *cmd;
5672
5673 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5674 {
5675 bfd_mach_o_segment_command *seg;
5676
5677 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5678 continue;
5679
5680 seg = &cmd->command.segment;
5681
5682 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5683 {
5684 unsigned long start = seg->fileoff;
5685 unsigned long end = seg->fileoff + seg->filesize;
5686 unsigned char *buf = bfd_malloc (1024);
5687 unsigned long size = 1024;
5688
5689 for (;;)
5690 {
5691 bfd_size_type nread = 0;
5692 unsigned long offset;
5693 int found_nonnull = 0;
5694
5695 if (size > (end - start))
5696 size = (end - start);
5697
5698 buf = bfd_realloc_or_free (buf, size);
5699 if (buf == NULL)
5700 return -1;
5701
5702 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5703 {
5704 free (buf);
5705 return -1;
5706 }
5707
5708 nread = bfd_bread (buf, size, abfd);
5709
5710 if (nread != size)
5711 {
5712 free (buf);
5713 return -1;
5714 }
5715
5716 for (offset = 4; offset <= size; offset += 4)
5717 {
5718 unsigned long val;
5719
5720 val = *((unsigned long *) (buf + size - offset));
5721 if (! found_nonnull)
5722 {
5723 if (val != 0)
5724 found_nonnull = 1;
5725 }
5726 else if (val == 0x0)
5727 {
5728 unsigned long bottom;
5729 unsigned long top;
5730
5731 bottom = seg->fileoff + seg->filesize - offset;
5732 top = seg->fileoff + seg->filesize - 4;
5733 *rbuf = bfd_malloc (top - bottom);
5734 *rlen = top - bottom;
5735
5736 memcpy (*rbuf, buf + size - *rlen, *rlen);
5737 free (buf);
5738 return 0;
5739 }
5740 }
5741
5742 if (size == (end - start))
5743 break;
5744
5745 size *= 2;
5746 }
5747
5748 free (buf);
5749 }
5750 }
5751
5752 return -1;
5753 }
5754
5755 char *
5756 bfd_mach_o_core_file_failing_command (bfd *abfd)
5757 {
5758 unsigned char *buf = NULL;
5759 unsigned int len = 0;
5760 int ret;
5761
5762 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5763 if (ret < 0)
5764 return NULL;
5765
5766 return (char *) buf;
5767 }
5768
5769 int
5770 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5771 {
5772 return 0;
5773 }
5774
5775 static bfd_mach_o_uuid_command *
5776 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5777 {
5778 bfd_mach_o_load_command *uuid_cmd = NULL;
5779 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5780 if (ncmd != 1 || uuid_cmd == NULL)
5781 return FALSE;
5782 return &uuid_cmd->command.uuid;
5783 }
5784
5785 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5786
5787 static bfd_boolean
5788 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5789 {
5790 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5791
5792 BFD_ASSERT (abfd);
5793 BFD_ASSERT (uuid_cmd);
5794
5795 if (!bfd_check_format (abfd, bfd_object))
5796 return FALSE;
5797
5798 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5799 || bfd_mach_o_get_data (abfd) == NULL
5800 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5801 return FALSE;
5802
5803 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5804 if (dsym_uuid_cmd == NULL)
5805 return FALSE;
5806
5807 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5808 sizeof (uuid_cmd->uuid)) != 0)
5809 return FALSE;
5810
5811 return TRUE;
5812 }
5813
5814 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5815 The caller is responsible for closing the returned BFD object and
5816 its my_archive if the returned BFD is in a fat dSYM. */
5817
5818 static bfd *
5819 bfd_mach_o_find_dsym (const char *dsym_filename,
5820 const bfd_mach_o_uuid_command *uuid_cmd,
5821 const bfd_arch_info_type *arch)
5822 {
5823 bfd *base_dsym_bfd, *dsym_bfd;
5824
5825 BFD_ASSERT (uuid_cmd);
5826
5827 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5828 if (base_dsym_bfd == NULL)
5829 return NULL;
5830
5831 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5832 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5833 return dsym_bfd;
5834
5835 bfd_close (dsym_bfd);
5836 if (base_dsym_bfd != dsym_bfd)
5837 bfd_close (base_dsym_bfd);
5838
5839 return NULL;
5840 }
5841
5842 /* Return a BFD created from a dSYM file for ABFD.
5843 The caller is responsible for closing the returned BFD object, its
5844 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5845
5846 static bfd *
5847 bfd_mach_o_follow_dsym (bfd *abfd)
5848 {
5849 char *dsym_filename;
5850 bfd_mach_o_uuid_command *uuid_cmd;
5851 bfd *dsym_bfd, *base_bfd = abfd;
5852 const char *base_basename;
5853
5854 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5855 return NULL;
5856
5857 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5858 base_bfd = abfd->my_archive;
5859 /* BFD may have been opened from a stream. */
5860 if (base_bfd->filename == NULL)
5861 {
5862 bfd_set_error (bfd_error_invalid_operation);
5863 return NULL;
5864 }
5865 base_basename = lbasename (base_bfd->filename);
5866
5867 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5868 if (uuid_cmd == NULL)
5869 return NULL;
5870
5871 /* TODO: We assume the DWARF file has the same as the binary's.
5872 It seems apple's GDB checks all files in the dSYM bundle directory.
5873 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5874 */
5875 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5876 + strlen (dsym_subdir) + 1
5877 + strlen (base_basename) + 1);
5878 sprintf (dsym_filename, "%s%s/%s",
5879 base_bfd->filename, dsym_subdir, base_basename);
5880
5881 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5882 bfd_get_arch_info (abfd));
5883 if (dsym_bfd == NULL)
5884 free (dsym_filename);
5885
5886 return dsym_bfd;
5887 }
5888
5889 bfd_boolean
5890 bfd_mach_o_find_nearest_line (bfd *abfd,
5891 asymbol **symbols,
5892 asection *section,
5893 bfd_vma offset,
5894 const char **filename_ptr,
5895 const char **functionname_ptr,
5896 unsigned int *line_ptr,
5897 unsigned int *discriminator_ptr)
5898 {
5899 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5900 if (mdata == NULL)
5901 return FALSE;
5902 switch (mdata->header.filetype)
5903 {
5904 case BFD_MACH_O_MH_OBJECT:
5905 break;
5906 case BFD_MACH_O_MH_EXECUTE:
5907 case BFD_MACH_O_MH_DYLIB:
5908 case BFD_MACH_O_MH_BUNDLE:
5909 case BFD_MACH_O_MH_KEXT_BUNDLE:
5910 if (mdata->dwarf2_find_line_info == NULL)
5911 {
5912 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5913 /* When we couldn't find dSYM for this binary, we look for
5914 the debug information in the binary itself. In this way,
5915 we won't try finding separated dSYM again because
5916 mdata->dwarf2_find_line_info will be filled. */
5917 if (! mdata->dsym_bfd)
5918 break;
5919 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5920 dwarf_debug_sections, symbols,
5921 &mdata->dwarf2_find_line_info,
5922 FALSE))
5923 return FALSE;
5924 }
5925 break;
5926 default:
5927 return FALSE;
5928 }
5929 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5930 filename_ptr, functionname_ptr,
5931 line_ptr, discriminator_ptr,
5932 dwarf_debug_sections, 0,
5933 &mdata->dwarf2_find_line_info);
5934 }
5935
5936 bfd_boolean
5937 bfd_mach_o_close_and_cleanup (bfd *abfd)
5938 {
5939 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5940 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5941 {
5942 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5943 bfd_mach_o_free_cached_info (abfd);
5944 if (mdata->dsym_bfd != NULL)
5945 {
5946 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5947 #if 0
5948 /* FIXME: PR 19435: This calculation to find the memory allocated by
5949 bfd_mach_o_follow_dsym for the filename does not always end up
5950 selecting the correct pointer. Unfortunately this problem is
5951 very hard to reproduce on a non Mach-O native system, so until it
5952 can be traced and fixed on such a system, this code will remain
5953 commented out. This does mean that there will be a memory leak,
5954 but it is small, and happens when we are closing down, so it
5955 should not matter too much. */
5956 char *dsym_filename = (char *)(fat_bfd
5957 ? fat_bfd->filename
5958 : mdata->dsym_bfd->filename);
5959 #endif
5960 bfd_close (mdata->dsym_bfd);
5961 mdata->dsym_bfd = NULL;
5962 if (fat_bfd)
5963 bfd_close (fat_bfd);
5964 #if 0
5965 free (dsym_filename);
5966 #endif
5967 }
5968 }
5969
5970 return _bfd_generic_close_and_cleanup (abfd);
5971 }
5972
5973 bfd_boolean
5974 bfd_mach_o_free_cached_info (bfd *abfd)
5975 {
5976 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5977 asection *asect;
5978 free (mdata->dyn_reloc_cache);
5979 mdata->dyn_reloc_cache = NULL;
5980 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5981 {
5982 free (asect->relocation);
5983 asect->relocation = NULL;
5984 }
5985
5986 return TRUE;
5987 }
5988
5989 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5990 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5991
5992 #define bfd_mach_o_canonicalize_one_reloc NULL
5993 #define bfd_mach_o_swap_reloc_out NULL
5994 #define bfd_mach_o_print_thread NULL
5995 #define bfd_mach_o_tgt_seg_table NULL
5996 #define bfd_mach_o_section_type_valid_for_tgt NULL
5997
5998 #define TARGET_NAME mach_o_be_vec
5999 #define TARGET_STRING "mach-o-be"
6000 #define TARGET_ARCHITECTURE bfd_arch_unknown
6001 #define TARGET_PAGESIZE 1
6002 #define TARGET_BIG_ENDIAN 1
6003 #define TARGET_ARCHIVE 0
6004 #define TARGET_PRIORITY 1
6005 #include "mach-o-target.c"
6006
6007 #undef TARGET_NAME
6008 #undef TARGET_STRING
6009 #undef TARGET_ARCHITECTURE
6010 #undef TARGET_PAGESIZE
6011 #undef TARGET_BIG_ENDIAN
6012 #undef TARGET_ARCHIVE
6013 #undef TARGET_PRIORITY
6014
6015 #define TARGET_NAME mach_o_le_vec
6016 #define TARGET_STRING "mach-o-le"
6017 #define TARGET_ARCHITECTURE bfd_arch_unknown
6018 #define TARGET_PAGESIZE 1
6019 #define TARGET_BIG_ENDIAN 0
6020 #define TARGET_ARCHIVE 0
6021 #define TARGET_PRIORITY 1
6022
6023 #include "mach-o-target.c"
6024
6025 #undef TARGET_NAME
6026 #undef TARGET_STRING
6027 #undef TARGET_ARCHITECTURE
6028 #undef TARGET_PAGESIZE
6029 #undef TARGET_BIG_ENDIAN
6030 #undef TARGET_ARCHIVE
6031 #undef TARGET_PRIORITY
6032
6033 /* Not yet handled: creating an archive. */
6034 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
6035
6036 #define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup
6037
6038 /* Not used. */
6039 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
6040 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
6041 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
6042
6043 #define TARGET_NAME mach_o_fat_vec
6044 #define TARGET_STRING "mach-o-fat"
6045 #define TARGET_ARCHITECTURE bfd_arch_unknown
6046 #define TARGET_PAGESIZE 1
6047 #define TARGET_BIG_ENDIAN 1
6048 #define TARGET_ARCHIVE 1
6049 #define TARGET_PRIORITY 0
6050
6051 #include "mach-o-target.c"
6052
6053 #undef TARGET_NAME
6054 #undef TARGET_STRING
6055 #undef TARGET_ARCHITECTURE
6056 #undef TARGET_PAGESIZE
6057 #undef TARGET_BIG_ENDIAN
6058 #undef TARGET_ARCHIVE
6059 #undef TARGET_PRIORITY
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