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[deliverable/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 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 /* PR 17512L: file: 730e492d. */
694 else
695 {
696 ody->rebase_size =
697 ody->bind_size =
698 ody->weak_bind_size =
699 ody->lazy_bind_size =
700 ody->export_size = 0;
701 ody->rebase_content =
702 ody->bind_content =
703 ody->weak_bind_content =
704 ody->lazy_bind_content =
705 ody->export_content = NULL;
706 }
707 }
708 break;
709
710 default:
711 /* That command should be handled. */
712 abort ();
713 }
714
715 /* Insert command. */
716 bfd_mach_o_append_command (obfd, ocmd);
717 }
718
719 return TRUE;
720 }
721
722 /* This allows us to set up to 32 bits of flags (unless we invent some
723 fiendish scheme to subdivide). For now, we'll just set the file flags
724 without error checking - just overwrite. */
725
726 bfd_boolean
727 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (!mdata)
732 return FALSE;
733
734 mdata->header.flags = flags;
735 return TRUE;
736 }
737
738 /* Count the total number of symbols. */
739
740 static long
741 bfd_mach_o_count_symbols (bfd *abfd)
742 {
743 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
744
745 if (mdata->symtab == NULL)
746 return 0;
747 return mdata->symtab->nsyms;
748 }
749
750 long
751 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
752 {
753 long nsyms = bfd_mach_o_count_symbols (abfd);
754
755 return ((nsyms + 1) * sizeof (asymbol *));
756 }
757
758 long
759 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
760 {
761 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
762 long nsyms = bfd_mach_o_count_symbols (abfd);
763 bfd_mach_o_symtab_command *sym = mdata->symtab;
764 unsigned long j;
765
766 if (nsyms < 0)
767 return nsyms;
768
769 if (nsyms == 0)
770 {
771 /* Do not try to read symbols if there are none. */
772 alocation[0] = NULL;
773 return 0;
774 }
775
776 if (!bfd_mach_o_read_symtab_symbols (abfd))
777 {
778 _bfd_error_handler
779 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
780 return 0;
781 }
782
783 BFD_ASSERT (sym->symbols != NULL);
784
785 for (j = 0; j < sym->nsyms; j++)
786 alocation[j] = &sym->symbols[j].symbol;
787
788 alocation[j] = NULL;
789
790 return nsyms;
791 }
792
793 /* Create synthetic symbols for indirect symbols. */
794
795 long
796 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
797 long symcount ATTRIBUTE_UNUSED,
798 asymbol **syms ATTRIBUTE_UNUSED,
799 long dynsymcount ATTRIBUTE_UNUSED,
800 asymbol **dynsyms ATTRIBUTE_UNUSED,
801 asymbol **ret)
802 {
803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
804 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
805 bfd_mach_o_symtab_command *symtab = mdata->symtab;
806 asymbol *s;
807 char * s_start;
808 char * s_end;
809 unsigned long count, i, j, n;
810 size_t size;
811 char *names;
812 char *nul_name;
813 const char stub [] = "$stub";
814
815 *ret = NULL;
816
817 /* Stop now if no symbols or no indirect symbols. */
818 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
819 || symtab == NULL || symtab->symbols == NULL)
820 return 0;
821
822 /* We need to allocate a bfd symbol for every indirect symbol and to
823 allocate the memory for its name. */
824 count = dysymtab->nindirectsyms;
825 size = count * sizeof (asymbol) + 1;
826
827 for (j = 0; j < count; j++)
828 {
829 const char * strng;
830 unsigned int isym = dysymtab->indirect_syms[j];
831
832 /* Some indirect symbols are anonymous. */
833 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
834 /* PR 17512: file: f5b8eeba. */
835 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
836 }
837
838 s_start = bfd_malloc (size);
839 s = *ret = (asymbol *) s_start;
840 if (s == NULL)
841 return -1;
842 names = (char *) (s + count);
843 nul_name = names;
844 *names++ = 0;
845 s_end = s_start + size;
846
847 n = 0;
848 for (i = 0; i < mdata->nsects; i++)
849 {
850 bfd_mach_o_section *sec = mdata->sections[i];
851 unsigned int first, last;
852 bfd_vma addr;
853 bfd_vma entry_size;
854
855 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
856 {
857 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
858 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
859 case BFD_MACH_O_S_SYMBOL_STUBS:
860 /* Only these sections have indirect symbols. */
861 first = sec->reserved1;
862 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
863 addr = sec->addr;
864 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
865
866 /* PR 17512: file: 08e15eec. */
867 if (first >= count || last >= count || first > last)
868 goto fail;
869
870 for (j = first; j < last; j++)
871 {
872 unsigned int isym = dysymtab->indirect_syms[j];
873
874 /* PR 17512: file: 04d64d9b. */
875 if (((char *) s) + sizeof (* s) > s_end)
876 goto fail;
877
878 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
879 s->section = sec->bfdsection;
880 s->value = addr - sec->addr;
881 s->udata.p = NULL;
882
883 if (isym < symtab->nsyms
884 && symtab->symbols[isym].symbol.name)
885 {
886 const char *sym = symtab->symbols[isym].symbol.name;
887 size_t len;
888
889 s->name = names;
890 len = strlen (sym);
891 /* PR 17512: file: 47dfd4d2. */
892 if (names + len >= s_end)
893 goto fail;
894 memcpy (names, sym, len);
895 names += len;
896 /* PR 17512: file: 18f340a4. */
897 if (names + sizeof (stub) >= s_end)
898 goto fail;
899 memcpy (names, stub, sizeof (stub));
900 names += sizeof (stub);
901 }
902 else
903 s->name = nul_name;
904
905 addr += entry_size;
906 s++;
907 n++;
908 }
909 break;
910 default:
911 break;
912 }
913 }
914
915 return n;
916
917 fail:
918 free (s_start);
919 * ret = NULL;
920 return -1;
921 }
922
923 void
924 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
925 asymbol *symbol,
926 symbol_info *ret)
927 {
928 bfd_symbol_info (symbol, ret);
929 }
930
931 void
932 bfd_mach_o_print_symbol (bfd *abfd,
933 void * afile,
934 asymbol *symbol,
935 bfd_print_symbol_type how)
936 {
937 FILE *file = (FILE *) afile;
938 const char *name;
939 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
940
941 switch (how)
942 {
943 case bfd_print_symbol_name:
944 fprintf (file, "%s", symbol->name);
945 break;
946 default:
947 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
948 if (asym->n_type & BFD_MACH_O_N_STAB)
949 name = bfd_get_stab_name (asym->n_type);
950 else
951 switch (asym->n_type & BFD_MACH_O_N_TYPE)
952 {
953 case BFD_MACH_O_N_UNDF:
954 if (symbol->value == 0)
955 name = "UND";
956 else
957 name = "COM";
958 break;
959 case BFD_MACH_O_N_ABS:
960 name = "ABS";
961 break;
962 case BFD_MACH_O_N_INDR:
963 name = "INDR";
964 break;
965 case BFD_MACH_O_N_PBUD:
966 name = "PBUD";
967 break;
968 case BFD_MACH_O_N_SECT:
969 name = "SECT";
970 break;
971 default:
972 name = "???";
973 break;
974 }
975 if (name == NULL)
976 name = "";
977 fprintf (file, " %02x %-6s %02x %04x",
978 asym->n_type, name, asym->n_sect, asym->n_desc);
979 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
980 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
981 fprintf (file, " [%s]", symbol->section->name);
982 fprintf (file, " %s", symbol->name);
983 }
984 }
985
986 static void
987 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
988 bfd_mach_o_cpu_subtype msubtype,
989 enum bfd_architecture *type,
990 unsigned long *subtype)
991 {
992 *subtype = bfd_arch_unknown;
993
994 switch (mtype)
995 {
996 case BFD_MACH_O_CPU_TYPE_VAX:
997 *type = bfd_arch_vax;
998 break;
999 case BFD_MACH_O_CPU_TYPE_MC680x0:
1000 *type = bfd_arch_m68k;
1001 break;
1002 case BFD_MACH_O_CPU_TYPE_I386:
1003 *type = bfd_arch_i386;
1004 *subtype = bfd_mach_i386_i386;
1005 break;
1006 case BFD_MACH_O_CPU_TYPE_X86_64:
1007 *type = bfd_arch_i386;
1008 *subtype = bfd_mach_x86_64;
1009 break;
1010 case BFD_MACH_O_CPU_TYPE_MIPS:
1011 *type = bfd_arch_mips;
1012 break;
1013 case BFD_MACH_O_CPU_TYPE_MC98000:
1014 *type = bfd_arch_m98k;
1015 break;
1016 case BFD_MACH_O_CPU_TYPE_HPPA:
1017 *type = bfd_arch_hppa;
1018 break;
1019 case BFD_MACH_O_CPU_TYPE_ARM:
1020 *type = bfd_arch_arm;
1021 switch (msubtype)
1022 {
1023 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1024 *subtype = bfd_mach_arm_4T;
1025 break;
1026 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1027 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1028 break;
1029 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1030 *subtype = bfd_mach_arm_5TE;
1031 break;
1032 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1033 *subtype = bfd_mach_arm_XScale;
1034 break;
1035 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1036 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1037 break;
1038 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1039 default:
1040 break;
1041 }
1042 break;
1043 case BFD_MACH_O_CPU_TYPE_MC88000:
1044 *type = bfd_arch_m88k;
1045 break;
1046 case BFD_MACH_O_CPU_TYPE_SPARC:
1047 *type = bfd_arch_sparc;
1048 *subtype = bfd_mach_sparc;
1049 break;
1050 case BFD_MACH_O_CPU_TYPE_I860:
1051 *type = bfd_arch_i860;
1052 break;
1053 case BFD_MACH_O_CPU_TYPE_ALPHA:
1054 *type = bfd_arch_alpha;
1055 break;
1056 case BFD_MACH_O_CPU_TYPE_POWERPC:
1057 *type = bfd_arch_powerpc;
1058 *subtype = bfd_mach_ppc;
1059 break;
1060 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1061 *type = bfd_arch_powerpc;
1062 *subtype = bfd_mach_ppc64;
1063 break;
1064 case BFD_MACH_O_CPU_TYPE_ARM64:
1065 *type = bfd_arch_aarch64;
1066 *subtype = bfd_mach_aarch64;
1067 break;
1068 default:
1069 *type = bfd_arch_unknown;
1070 break;
1071 }
1072 }
1073
1074 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1075 number of bytes written or -1 in case of error. */
1076
1077 static int
1078 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1079 {
1080 if (len % 4 != 0)
1081 {
1082 char pad[4] = {0,0,0,0};
1083 unsigned int padlen = 4 - (len % 4);
1084
1085 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1086 return -1;
1087
1088 return padlen;
1089 }
1090 else
1091 return 0;
1092 }
1093
1094 /* Likewise, but for a command. */
1095
1096 static int
1097 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1098 {
1099 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1100
1101 if (len % align != 0)
1102 {
1103 char pad[8] = {0};
1104 unsigned int padlen = align - (len % align);
1105
1106 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1107 return -1;
1108
1109 return padlen;
1110 }
1111 else
1112 return 0;
1113 }
1114
1115 static bfd_boolean
1116 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1117 {
1118 struct mach_o_header_external raw;
1119 unsigned int size;
1120
1121 size = mach_o_wide_p (header) ?
1122 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1123
1124 bfd_h_put_32 (abfd, header->magic, raw.magic);
1125 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1126 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1127 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1128 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1129 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1130 bfd_h_put_32 (abfd, header->flags, raw.flags);
1131
1132 if (mach_o_wide_p (header))
1133 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1134
1135 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1136 || bfd_bwrite (&raw, size, abfd) != size)
1137 return FALSE;
1138
1139 return TRUE;
1140 }
1141
1142 static bfd_boolean
1143 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1144 {
1145 bfd_mach_o_thread_command *cmd = &command->command.thread;
1146 unsigned int i;
1147 struct mach_o_thread_command_external raw;
1148 unsigned int offset;
1149
1150 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1151 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1152
1153 offset = BFD_MACH_O_LC_SIZE;
1154 for (i = 0; i < cmd->nflavours; i++)
1155 {
1156 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1157 BFD_ASSERT (cmd->flavours[i].offset ==
1158 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1159
1160 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1161 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1162
1163 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1164 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1165 return FALSE;
1166
1167 offset += cmd->flavours[i].size + sizeof (raw);
1168 }
1169
1170 return TRUE;
1171 }
1172
1173 static bfd_boolean
1174 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1175 {
1176 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1177 struct mach_o_str_command_external raw;
1178 unsigned int namelen;
1179
1180 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1181
1182 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1183 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1184 return FALSE;
1185
1186 namelen = strlen (cmd->name_str) + 1;
1187 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1188 return FALSE;
1189
1190 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1191 return FALSE;
1192
1193 return TRUE;
1194 }
1195
1196 static bfd_boolean
1197 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1198 {
1199 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1200 struct mach_o_dylib_command_external raw;
1201 unsigned int namelen;
1202
1203 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1204 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1205 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1206 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1207
1208 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1209 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1210 return FALSE;
1211
1212 namelen = strlen (cmd->name_str) + 1;
1213 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1214 return FALSE;
1215
1216 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1217 return FALSE;
1218
1219 return TRUE;
1220 }
1221
1222 static bfd_boolean
1223 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1224 {
1225 bfd_mach_o_main_command *cmd = &command->command.main;
1226 struct mach_o_entry_point_command_external raw;
1227
1228 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1229 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1230
1231 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1232 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1233 return FALSE;
1234
1235 return TRUE;
1236 }
1237
1238 static bfd_boolean
1239 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1240 {
1241 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1242 struct mach_o_dyld_info_command_external raw;
1243
1244 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1245 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1246 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1247 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1248 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1249 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1250 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1251 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1252 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1253 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1254
1255 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1256 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1257 return FALSE;
1258
1259 if (cmd->rebase_size != 0)
1260 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1261 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1262 cmd->rebase_size))
1263 return FALSE;
1264
1265 if (cmd->bind_size != 0)
1266 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1267 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1268 cmd->bind_size))
1269 return FALSE;
1270
1271 if (cmd->weak_bind_size != 0)
1272 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1273 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1274 cmd->weak_bind_size))
1275 return FALSE;
1276
1277 if (cmd->lazy_bind_size != 0)
1278 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1279 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1280 cmd->lazy_bind_size))
1281 return FALSE;
1282
1283 if (cmd->export_size != 0)
1284 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1285 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1286 cmd->export_size))
1287 return FALSE;
1288
1289 return TRUE;
1290 }
1291
1292 long
1293 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1294 asection *asect)
1295 {
1296 return (asect->reloc_count + 1) * sizeof (arelent *);
1297 }
1298
1299 /* In addition to the need to byte-swap the symbol number, the bit positions
1300 of the fields in the relocation information vary per target endian-ness. */
1301
1302 void
1303 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1304 unsigned char *fields)
1305 {
1306 unsigned char info = fields[3];
1307
1308 if (bfd_big_endian (abfd))
1309 {
1310 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1311 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1312 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1313 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1314 & BFD_MACH_O_LENGTH_MASK;
1315 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1316 }
1317 else
1318 {
1319 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1320 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1321 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1322 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1323 & BFD_MACH_O_LENGTH_MASK;
1324 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1325 }
1326 }
1327
1328 /* Set syms_ptr_ptr and addend of RES. */
1329
1330 bfd_boolean
1331 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1332 bfd_mach_o_reloc_info *reloc,
1333 arelent *res, asymbol **syms)
1334 {
1335 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1336 unsigned int num;
1337 asymbol **sym;
1338
1339 /* Non-scattered relocation. */
1340 reloc->r_scattered = 0;
1341 res->addend = 0;
1342
1343 num = reloc->r_value;
1344
1345 if (reloc->r_extern)
1346 {
1347 /* PR 17512: file: 8396-1185-0.004. */
1348 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1349 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1350 else if (syms == NULL)
1351 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1352 else
1353 /* An external symbol number. */
1354 sym = syms + num;
1355 }
1356 else if (num == 0x00ffffff || num == 0)
1357 {
1358 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1359 is generic code, we don't know wether this is really a PAIR.
1360 This value is almost certainly not a valid section number, hence
1361 this specific case to avoid an assertion failure.
1362 Target specific swap_reloc_in routine should adjust that. */
1363 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1364 }
1365 else
1366 {
1367 /* PR 17512: file: 006-2964-0.004. */
1368 if (num > mdata->nsects)
1369 return FALSE;
1370
1371 /* A section number. */
1372 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1373 /* For a symbol defined in section S, the addend (stored in the
1374 binary) contains the address of the section. To comply with
1375 bfd convention, subtract the section address.
1376 Use the address from the header, so that the user can modify
1377 the vma of the section. */
1378 res->addend = -mdata->sections[num - 1]->addr;
1379 }
1380
1381 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1382 in the lower 16bits of the address value. So we have to find the
1383 'symbol' from the preceding reloc. We do this even though the
1384 section symbol is probably not needed here, because NULL symbol
1385 values cause an assert in generic BFD code. This must be done in
1386 the PPC swap_reloc_in routine. */
1387 res->sym_ptr_ptr = sym;
1388
1389 return TRUE;
1390 }
1391
1392 /* Do most of the work for canonicalize_relocs on RAW: create internal
1393 representation RELOC and set most fields of RES using symbol table SYMS.
1394 Each target still has to set the howto of RES and possibly adjust other
1395 fields.
1396 Previously the Mach-O hook point was simply swap_in, but some targets
1397 (like arm64) don't follow the generic rules (symnum is a value for the
1398 non-scattered relocation ADDEND). */
1399
1400 bfd_boolean
1401 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1402 struct mach_o_reloc_info_external *raw,
1403 bfd_mach_o_reloc_info *reloc,
1404 arelent *res, asymbol **syms)
1405 {
1406 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1407 bfd_vma addr;
1408
1409 addr = bfd_get_32 (abfd, raw->r_address);
1410 res->sym_ptr_ptr = NULL;
1411 res->addend = 0;
1412
1413 if (addr & BFD_MACH_O_SR_SCATTERED)
1414 {
1415 unsigned int j;
1416 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1417
1418 /* Scattered relocation, can't be extern. */
1419 reloc->r_scattered = 1;
1420 reloc->r_extern = 0;
1421
1422 /* Extract section and offset from r_value (symnum). */
1423 reloc->r_value = symnum;
1424 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1425 end of the data for the section (e.g. in a calculation of section
1426 data length). At present, the symbol will end up associated with
1427 the following section or, if it falls within alignment padding, as
1428 null - which will assert later. */
1429 for (j = 0; j < mdata->nsects; j++)
1430 {
1431 bfd_mach_o_section *sect = mdata->sections[j];
1432 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1433 {
1434 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1435 res->addend = symnum - sect->addr;
1436 break;
1437 }
1438 }
1439
1440 /* Extract the info and address fields from r_address. */
1441 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1442 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1443 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1444 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1445 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1446 }
1447 else
1448 {
1449 /* Non-scattered relocation. */
1450 reloc->r_scattered = 0;
1451 reloc->r_address = addr;
1452 res->address = addr;
1453
1454 /* The value and info fields have to be extracted dependent on target
1455 endian-ness. */
1456 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1457
1458 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1459 res, syms))
1460 return FALSE;
1461 }
1462
1463 /* We have set up a reloc with all the information present, so the swapper
1464 can modify address, value and addend fields, if necessary, to convey
1465 information in the generic BFD reloc that is mach-o specific. */
1466
1467 return TRUE;
1468 }
1469
1470 static int
1471 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1472 unsigned long count,
1473 arelent *res, asymbol **syms)
1474 {
1475 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1476 unsigned long i;
1477 struct mach_o_reloc_info_external *native_relocs;
1478 bfd_size_type native_size;
1479
1480 /* Allocate and read relocs. */
1481 native_size = count * BFD_MACH_O_RELENT_SIZE;
1482
1483 /* PR 17512: file: 09477b57. */
1484 if (native_size < count)
1485 return -1;
1486
1487 native_relocs =
1488 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1489 if (native_relocs == NULL)
1490 return -1;
1491
1492 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1493 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1494 goto err;
1495
1496 for (i = 0; i < count; i++)
1497 {
1498 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1499 &res[i], syms, res))
1500 goto err;
1501 }
1502 free (native_relocs);
1503 return i;
1504 err:
1505 free (native_relocs);
1506 return -1;
1507 }
1508
1509 long
1510 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1511 arelent **rels, asymbol **syms)
1512 {
1513 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1514 unsigned long i;
1515 arelent *res;
1516
1517 if (asect->reloc_count == 0)
1518 return 0;
1519
1520 /* No need to go further if we don't know how to read relocs. */
1521 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1522 return 0;
1523
1524 if (asect->relocation == NULL)
1525 {
1526 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1527 return -1;
1528 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1529 if (res == NULL)
1530 return -1;
1531
1532 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1533 asect->reloc_count, res, syms) < 0)
1534 {
1535 free (res);
1536 return -1;
1537 }
1538 asect->relocation = res;
1539 }
1540
1541 res = asect->relocation;
1542 for (i = 0; i < asect->reloc_count; i++)
1543 rels[i] = &res[i];
1544 rels[i] = NULL;
1545
1546 return i;
1547 }
1548
1549 long
1550 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1551 {
1552 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1553
1554 if (mdata->dysymtab == NULL)
1555 return 1;
1556 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1557 * sizeof (arelent *);
1558 }
1559
1560 long
1561 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1562 struct bfd_symbol **syms)
1563 {
1564 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1565 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1566 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1567 unsigned long i;
1568 arelent *res;
1569
1570 if (dysymtab == NULL)
1571 return 0;
1572 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1573 return 0;
1574
1575 /* No need to go further if we don't know how to read relocs. */
1576 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1577 return 0;
1578
1579 if (mdata->dyn_reloc_cache == NULL)
1580 {
1581 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1582 < (dysymtab->nextrel + dysymtab->nlocrel))
1583 return -1;
1584
1585 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1586 * sizeof (arelent));
1587 if (res == NULL)
1588 return -1;
1589
1590 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1591 dysymtab->nextrel, res, syms) < 0)
1592 {
1593 free (res);
1594 return -1;
1595 }
1596
1597 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1598 dysymtab->nlocrel,
1599 res + dysymtab->nextrel, syms) < 0)
1600 {
1601 free (res);
1602 return -1;
1603 }
1604
1605 mdata->dyn_reloc_cache = res;
1606 }
1607
1608 res = mdata->dyn_reloc_cache;
1609 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1610 rels[i] = &res[i];
1611 rels[i] = NULL;
1612 return i;
1613 }
1614
1615 /* In addition to the need to byte-swap the symbol number, the bit positions
1616 of the fields in the relocation information vary per target endian-ness. */
1617
1618 static void
1619 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1620 bfd_mach_o_reloc_info *rel)
1621 {
1622 unsigned char info = 0;
1623
1624 BFD_ASSERT (rel->r_type <= 15);
1625 BFD_ASSERT (rel->r_length <= 3);
1626
1627 if (bfd_big_endian (abfd))
1628 {
1629 fields[0] = (rel->r_value >> 16) & 0xff;
1630 fields[1] = (rel->r_value >> 8) & 0xff;
1631 fields[2] = rel->r_value & 0xff;
1632 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1633 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1634 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1635 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1636 }
1637 else
1638 {
1639 fields[2] = (rel->r_value >> 16) & 0xff;
1640 fields[1] = (rel->r_value >> 8) & 0xff;
1641 fields[0] = rel->r_value & 0xff;
1642 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1643 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1644 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1645 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1646 }
1647 fields[3] = info;
1648 }
1649
1650 static bfd_boolean
1651 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1652 {
1653 unsigned int i;
1654 arelent **entries;
1655 asection *sec;
1656 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1657
1658 sec = section->bfdsection;
1659 if (sec->reloc_count == 0)
1660 return TRUE;
1661
1662 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1663 return TRUE;
1664
1665 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1666 return FALSE;
1667
1668 /* Convert and write. */
1669 entries = section->bfdsection->orelocation;
1670 for (i = 0; i < section->nreloc; i++)
1671 {
1672 arelent *rel = entries[i];
1673 struct mach_o_reloc_info_external raw;
1674 bfd_mach_o_reloc_info info, *pinfo = &info;
1675
1676 /* Convert relocation to an intermediate representation. */
1677 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1678 return FALSE;
1679
1680 /* Lower the relocation info. */
1681 if (pinfo->r_scattered)
1682 {
1683 unsigned long v;
1684
1685 v = BFD_MACH_O_SR_SCATTERED
1686 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1687 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1688 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1689 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1690 /* Note: scattered relocs have field in reverse order... */
1691 bfd_put_32 (abfd, v, raw.r_address);
1692 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1693 }
1694 else
1695 {
1696 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1697 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1698 pinfo);
1699 }
1700
1701 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1702 != BFD_MACH_O_RELENT_SIZE)
1703 return FALSE;
1704 }
1705 return TRUE;
1706 }
1707
1708 static bfd_boolean
1709 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1710 {
1711 struct mach_o_section_32_external raw;
1712
1713 memcpy (raw.sectname, section->sectname, 16);
1714 memcpy (raw.segname, section->segname, 16);
1715 bfd_h_put_32 (abfd, section->addr, raw.addr);
1716 bfd_h_put_32 (abfd, section->size, raw.size);
1717 bfd_h_put_32 (abfd, section->offset, raw.offset);
1718 bfd_h_put_32 (abfd, section->align, raw.align);
1719 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1720 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1721 bfd_h_put_32 (abfd, section->flags, raw.flags);
1722 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1723 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1724
1725 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1726 != BFD_MACH_O_SECTION_SIZE)
1727 return FALSE;
1728
1729 return TRUE;
1730 }
1731
1732 static bfd_boolean
1733 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1734 {
1735 struct mach_o_section_64_external raw;
1736
1737 memcpy (raw.sectname, section->sectname, 16);
1738 memcpy (raw.segname, section->segname, 16);
1739 bfd_h_put_64 (abfd, section->addr, raw.addr);
1740 bfd_h_put_64 (abfd, section->size, raw.size);
1741 bfd_h_put_32 (abfd, section->offset, raw.offset);
1742 bfd_h_put_32 (abfd, section->align, raw.align);
1743 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1744 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1745 bfd_h_put_32 (abfd, section->flags, raw.flags);
1746 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1747 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1748 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1749
1750 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1751 != BFD_MACH_O_SECTION_64_SIZE)
1752 return FALSE;
1753
1754 return TRUE;
1755 }
1756
1757 static bfd_boolean
1758 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1759 {
1760 struct mach_o_segment_command_32_external raw;
1761 bfd_mach_o_segment_command *seg = &command->command.segment;
1762 bfd_mach_o_section *sec;
1763
1764 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1765
1766 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1767 if (!bfd_mach_o_write_relocs (abfd, sec))
1768 return FALSE;
1769
1770 memcpy (raw.segname, seg->segname, 16);
1771 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1772 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1773 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1774 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1775 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1776 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1777 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1778 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1779
1780 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1781 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1782 return FALSE;
1783
1784 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1785 if (!bfd_mach_o_write_section_32 (abfd, sec))
1786 return FALSE;
1787
1788 return TRUE;
1789 }
1790
1791 static bfd_boolean
1792 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1793 {
1794 struct mach_o_segment_command_64_external raw;
1795 bfd_mach_o_segment_command *seg = &command->command.segment;
1796 bfd_mach_o_section *sec;
1797
1798 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1799
1800 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1801 if (!bfd_mach_o_write_relocs (abfd, sec))
1802 return FALSE;
1803
1804 memcpy (raw.segname, seg->segname, 16);
1805 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1806 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1807 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1808 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1809 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1810 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1811 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1812 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1813
1814 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1815 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1816 return FALSE;
1817
1818 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1819 if (!bfd_mach_o_write_section_64 (abfd, sec))
1820 return FALSE;
1821
1822 return TRUE;
1823 }
1824
1825 static bfd_boolean
1826 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1827 {
1828 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1829 unsigned long i;
1830 unsigned int wide = bfd_mach_o_wide_p (abfd);
1831 struct bfd_strtab_hash *strtab;
1832 asymbol **symbols = bfd_get_outsymbols (abfd);
1833 int padlen;
1834
1835 /* Write the symbols first. */
1836 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1837 return FALSE;
1838
1839 strtab = _bfd_stringtab_init ();
1840 if (strtab == NULL)
1841 return FALSE;
1842
1843 if (sym->nsyms > 0)
1844 /* Although we don't strictly need to do this, for compatibility with
1845 Darwin system tools, actually output an empty string for the index
1846 0 entry. */
1847 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1848
1849 for (i = 0; i < sym->nsyms; i++)
1850 {
1851 bfd_size_type str_index;
1852 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1853
1854 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1855 /* An index of 0 always means the empty string. */
1856 str_index = 0;
1857 else
1858 {
1859 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1860
1861 if (str_index == (bfd_size_type) -1)
1862 goto err;
1863 }
1864
1865 if (wide)
1866 {
1867 struct mach_o_nlist_64_external raw;
1868
1869 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1870 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1871 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1872 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1873 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1874 raw.n_value);
1875
1876 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1877 goto err;
1878 }
1879 else
1880 {
1881 struct mach_o_nlist_external raw;
1882
1883 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1884 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1885 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1886 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1887 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1888 raw.n_value);
1889
1890 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1891 goto err;
1892 }
1893 }
1894 sym->strsize = _bfd_stringtab_size (strtab);
1895 sym->stroff = mdata->filelen;
1896 mdata->filelen += sym->strsize;
1897
1898 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1899 goto err;
1900
1901 if (!_bfd_stringtab_emit (abfd, strtab))
1902 goto err;
1903
1904 /* Pad string table. */
1905 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1906 if (padlen < 0)
1907 return FALSE;
1908 mdata->filelen += padlen;
1909 sym->strsize += padlen;
1910
1911 return TRUE;
1912
1913 err:
1914 _bfd_stringtab_free (strtab);
1915 sym->strsize = 0;
1916 return FALSE;
1917 }
1918
1919 static bfd_boolean
1920 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1921 {
1922 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1923 struct mach_o_symtab_command_external raw;
1924
1925 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1926
1927 /* The command. */
1928 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1929 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1930 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1931 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1932
1933 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1934 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1935 return FALSE;
1936
1937 return TRUE;
1938 }
1939
1940 /* Count the number of indirect symbols in the image.
1941 Requires that the sections are in their final order. */
1942
1943 static unsigned int
1944 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1945 {
1946 unsigned int i;
1947 unsigned int nisyms = 0;
1948
1949 for (i = 0; i < mdata->nsects; ++i)
1950 {
1951 bfd_mach_o_section *sec = mdata->sections[i];
1952
1953 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1954 {
1955 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1956 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1957 case BFD_MACH_O_S_SYMBOL_STUBS:
1958 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1959 break;
1960 default:
1961 break;
1962 }
1963 }
1964 return nisyms;
1965 }
1966
1967 /* Create the dysymtab. */
1968
1969 static bfd_boolean
1970 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1971 {
1972 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1973
1974 /* TODO:
1975 We are not going to try and fill these in yet and, moreover, we are
1976 going to bail if they are already set. */
1977 if (cmd->nmodtab != 0
1978 || cmd->ntoc != 0
1979 || cmd->nextrefsyms != 0)
1980 {
1981 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
1982 " implemented for dysymtab commands."));
1983 return FALSE;
1984 }
1985
1986 cmd->ilocalsym = 0;
1987
1988 if (bfd_get_symcount (abfd) > 0)
1989 {
1990 asymbol **symbols = bfd_get_outsymbols (abfd);
1991 unsigned long i;
1992
1993 /* Count the number of each kind of symbol. */
1994 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1995 {
1996 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1997 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1998 break;
1999 }
2000 cmd->nlocalsym = i;
2001 cmd->iextdefsym = i;
2002 for (; i < bfd_get_symcount (abfd); ++i)
2003 {
2004 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2005 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2006 break;
2007 }
2008 cmd->nextdefsym = i - cmd->nlocalsym;
2009 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2010 cmd->nundefsym = bfd_get_symcount (abfd)
2011 - cmd->nlocalsym
2012 - cmd->nextdefsym;
2013 }
2014 else
2015 {
2016 cmd->nlocalsym = 0;
2017 cmd->iextdefsym = 0;
2018 cmd->nextdefsym = 0;
2019 cmd->iundefsym = 0;
2020 cmd->nundefsym = 0;
2021 }
2022
2023 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2024 if (cmd->nindirectsyms > 0)
2025 {
2026 unsigned i;
2027 unsigned n;
2028
2029 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2030 cmd->indirectsymoff = mdata->filelen;
2031 mdata->filelen += cmd->nindirectsyms * 4;
2032
2033 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2034 return FALSE;
2035 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2036 if (cmd->indirect_syms == NULL)
2037 return FALSE;
2038
2039 n = 0;
2040 for (i = 0; i < mdata->nsects; ++i)
2041 {
2042 bfd_mach_o_section *sec = mdata->sections[i];
2043
2044 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2045 {
2046 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2047 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2048 case BFD_MACH_O_S_SYMBOL_STUBS:
2049 {
2050 unsigned j, num;
2051 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2052
2053 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2054 if (isyms == NULL || num == 0)
2055 break;
2056 /* Record the starting index in the reserved1 field. */
2057 sec->reserved1 = n;
2058 for (j = 0; j < num; j++, n++)
2059 {
2060 if (isyms[j] == NULL)
2061 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2062 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2063 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2064 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2065 | BFD_MACH_O_INDIRECT_SYM_ABS;
2066 else
2067 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2068 }
2069 }
2070 break;
2071 default:
2072 break;
2073 }
2074 }
2075 }
2076
2077 return TRUE;
2078 }
2079
2080 /* Write a dysymtab command.
2081 TODO: Possibly coalesce writes of smaller objects. */
2082
2083 static bfd_boolean
2084 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2085 {
2086 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2087
2088 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2089
2090 if (cmd->nmodtab != 0)
2091 {
2092 unsigned int i;
2093
2094 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2095 return FALSE;
2096
2097 for (i = 0; i < cmd->nmodtab; i++)
2098 {
2099 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2100 unsigned int iinit;
2101 unsigned int ninit;
2102
2103 iinit = module->iinit & 0xffff;
2104 iinit |= ((module->iterm & 0xffff) << 16);
2105
2106 ninit = module->ninit & 0xffff;
2107 ninit |= ((module->nterm & 0xffff) << 16);
2108
2109 if (bfd_mach_o_wide_p (abfd))
2110 {
2111 struct mach_o_dylib_module_64_external w;
2112
2113 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2114 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2115 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2116 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2117 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2118 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2119 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2120 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2121 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2122 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2123 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2124 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2125 &w.objc_module_info_addr);
2126 bfd_h_put_32 (abfd, module->objc_module_info_size,
2127 &w.objc_module_info_size);
2128
2129 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2130 return FALSE;
2131 }
2132 else
2133 {
2134 struct mach_o_dylib_module_external n;
2135
2136 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2137 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2138 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2139 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2140 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2141 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2142 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2143 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2144 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2145 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2146 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2147 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2148 &n.objc_module_info_addr);
2149 bfd_h_put_32 (abfd, module->objc_module_info_size,
2150 &n.objc_module_info_size);
2151
2152 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2153 return FALSE;
2154 }
2155 }
2156 }
2157
2158 if (cmd->ntoc != 0)
2159 {
2160 unsigned int i;
2161
2162 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2163 return FALSE;
2164
2165 for (i = 0; i < cmd->ntoc; i++)
2166 {
2167 struct mach_o_dylib_table_of_contents_external raw;
2168 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2169
2170 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2171 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2172
2173 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2174 return FALSE;
2175 }
2176 }
2177
2178 if (cmd->nindirectsyms > 0)
2179 {
2180 unsigned int i;
2181
2182 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2183 return FALSE;
2184
2185 for (i = 0; i < cmd->nindirectsyms; ++i)
2186 {
2187 unsigned char raw[4];
2188
2189 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2190 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2191 return FALSE;
2192 }
2193 }
2194
2195 if (cmd->nextrefsyms != 0)
2196 {
2197 unsigned int i;
2198
2199 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2200 return FALSE;
2201
2202 for (i = 0; i < cmd->nextrefsyms; i++)
2203 {
2204 unsigned long v;
2205 unsigned char raw[4];
2206 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2207
2208 /* Fields isym and flags are written as bit-fields, thus we need
2209 a specific processing for endianness. */
2210
2211 if (bfd_big_endian (abfd))
2212 {
2213 v = ((ref->isym & 0xffffff) << 8);
2214 v |= ref->flags & 0xff;
2215 }
2216 else
2217 {
2218 v = ref->isym & 0xffffff;
2219 v |= ((ref->flags & 0xff) << 24);
2220 }
2221
2222 bfd_h_put_32 (abfd, v, raw);
2223 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2224 return FALSE;
2225 }
2226 }
2227
2228 /* The command. */
2229 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2230 return FALSE;
2231 else
2232 {
2233 struct mach_o_dysymtab_command_external raw;
2234
2235 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2236 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2237 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2238 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2239 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2240 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2241 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2242 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2243 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2244 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2245 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2246 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2247 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2248 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2249 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2250 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2251 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2252 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2253
2254 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2255 return FALSE;
2256 }
2257
2258 return TRUE;
2259 }
2260
2261 static unsigned
2262 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2263 {
2264 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2265
2266 /* Just leave debug symbols where they are (pretend they are local, and
2267 then they will just be sorted on position). */
2268 if (s->n_type & BFD_MACH_O_N_STAB)
2269 return 0;
2270
2271 /* Local (we should never see an undefined local AFAICT). */
2272 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2273 return 0;
2274
2275 /* Common symbols look like undefined externs. */
2276 if (mtyp == BFD_MACH_O_N_UNDF)
2277 return 2;
2278
2279 /* A defined non-local, non-debug symbol. */
2280 return 1;
2281 }
2282
2283 static int
2284 bfd_mach_o_cf_symbols (const void *a, const void *b)
2285 {
2286 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2287 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2288 unsigned int soa, sob;
2289
2290 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2291 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2292 if (soa < sob)
2293 return -1;
2294
2295 if (soa > sob)
2296 return 1;
2297
2298 /* If it's local or stab, just preserve the input order. */
2299 if (soa == 0)
2300 {
2301 if (sa->symbol.udata.i < sb->symbol.udata.i)
2302 return -1;
2303 if (sa->symbol.udata.i > sb->symbol.udata.i)
2304 return 1;
2305
2306 /* This is probably an error. */
2307 return 0;
2308 }
2309
2310 /* The second sort key is name. */
2311 return strcmp (sa->symbol.name, sb->symbol.name);
2312 }
2313
2314 /* Process the symbols.
2315
2316 This should be OK for single-module files - but it is not likely to work
2317 for multi-module shared libraries.
2318
2319 (a) If the application has not filled in the relevant mach-o fields, make
2320 an estimate.
2321
2322 (b) Order them, like this:
2323 ( i) local.
2324 (unsorted)
2325 ( ii) external defined
2326 (by name)
2327 (iii) external undefined/common
2328 (by name)
2329 ( iv) common
2330 (by name)
2331 */
2332
2333 static bfd_boolean
2334 bfd_mach_o_mangle_symbols (bfd *abfd)
2335 {
2336 unsigned long i;
2337 asymbol **symbols = bfd_get_outsymbols (abfd);
2338
2339 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2340 return TRUE;
2341
2342 for (i = 0; i < bfd_get_symcount (abfd); i++)
2343 {
2344 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2345
2346 /* We use this value, which is out-of-range as a symbol index, to signal
2347 that the mach-o-specific data are not filled in and need to be created
2348 from the bfd values. It is much preferable for the application to do
2349 this, since more meaningful diagnostics can be made that way. */
2350
2351 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2352 {
2353 /* No symbol information has been set - therefore determine
2354 it from the bfd symbol flags/info. */
2355 if (s->symbol.section == bfd_abs_section_ptr)
2356 s->n_type = BFD_MACH_O_N_ABS;
2357 else if (s->symbol.section == bfd_und_section_ptr)
2358 {
2359 s->n_type = BFD_MACH_O_N_UNDF;
2360 if (s->symbol.flags & BSF_WEAK)
2361 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2362 /* mach-o automatically makes undefined symbols extern. */
2363 s->n_type |= BFD_MACH_O_N_EXT;
2364 s->symbol.flags |= BSF_GLOBAL;
2365 }
2366 else if (s->symbol.section == bfd_com_section_ptr)
2367 {
2368 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2369 s->symbol.flags |= BSF_GLOBAL;
2370 }
2371 else
2372 s->n_type = BFD_MACH_O_N_SECT;
2373
2374 if (s->symbol.flags & BSF_GLOBAL)
2375 s->n_type |= BFD_MACH_O_N_EXT;
2376 }
2377
2378 /* Put the section index in, where required. */
2379 if ((s->symbol.section != bfd_abs_section_ptr
2380 && s->symbol.section != bfd_und_section_ptr
2381 && s->symbol.section != bfd_com_section_ptr)
2382 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2383 && s->symbol.name == NULL))
2384 s->n_sect = s->symbol.section->output_section->target_index;
2385
2386 /* Number to preserve order for local and debug syms. */
2387 s->symbol.udata.i = i;
2388 }
2389
2390 /* Sort the symbols. */
2391 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2392 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2393
2394 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2395 {
2396 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2397 s->symbol.udata.i = i; /* renumber. */
2398 }
2399
2400 return TRUE;
2401 }
2402
2403 /* We build a flat table of sections, which can be re-ordered if necessary.
2404 Fill in the section number and other mach-o-specific data. */
2405
2406 static bfd_boolean
2407 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2408 {
2409 asection *sec;
2410 unsigned target_index;
2411 unsigned nsect;
2412
2413 nsect = bfd_count_sections (abfd);
2414
2415 /* Don't do it if it's already set - assume the application knows what it's
2416 doing. */
2417 if (mdata->nsects == nsect
2418 && (mdata->nsects == 0 || mdata->sections != NULL))
2419 return TRUE;
2420
2421 /* We need to check that this can be done... */
2422 if (nsect > 255)
2423 {
2424 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2425 " maximum is 255,\n"), nsect);
2426 return FALSE;
2427 }
2428
2429 mdata->nsects = nsect;
2430 mdata->sections = bfd_alloc2 (abfd,
2431 mdata->nsects, sizeof (bfd_mach_o_section *));
2432 if (mdata->sections == NULL)
2433 return FALSE;
2434
2435 /* Create Mach-O sections.
2436 Section type, attribute and align should have been set when the
2437 section was created - either read in or specified. */
2438 target_index = 0;
2439 for (sec = abfd->sections; sec; sec = sec->next)
2440 {
2441 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2442 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2443
2444 mdata->sections[target_index] = msect;
2445
2446 msect->addr = bfd_get_section_vma (abfd, sec);
2447 msect->size = bfd_get_section_size (sec);
2448
2449 /* Use the largest alignment set, in case it was bumped after the
2450 section was created. */
2451 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2452
2453 msect->offset = 0;
2454 sec->target_index = ++target_index;
2455 }
2456
2457 return TRUE;
2458 }
2459
2460 bfd_boolean
2461 bfd_mach_o_write_contents (bfd *abfd)
2462 {
2463 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2464 bfd_mach_o_load_command *cmd;
2465 bfd_mach_o_symtab_command *symtab = NULL;
2466 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2467 bfd_mach_o_segment_command *linkedit = NULL;
2468
2469 /* Make the commands, if not already present. */
2470 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2471 return FALSE;
2472 abfd->output_has_begun = TRUE;
2473
2474 /* Write the header. */
2475 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2476 return FALSE;
2477
2478 /* First pass: allocate the linkedit segment. */
2479 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2480 switch (cmd->type)
2481 {
2482 case BFD_MACH_O_LC_SEGMENT_64:
2483 case BFD_MACH_O_LC_SEGMENT:
2484 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2485 linkedit = &cmd->command.segment;
2486 break;
2487 case BFD_MACH_O_LC_SYMTAB:
2488 symtab = &cmd->command.symtab;
2489 break;
2490 case BFD_MACH_O_LC_DYSYMTAB:
2491 dysymtab = &cmd->command.dysymtab;
2492 break;
2493 case BFD_MACH_O_LC_DYLD_INFO:
2494 {
2495 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2496
2497 if (di->rebase_size != 0)
2498 {
2499 di->rebase_off = mdata->filelen;
2500 mdata->filelen += di->rebase_size;
2501 }
2502 if (di->bind_size != 0)
2503 {
2504 di->bind_off = mdata->filelen;
2505 mdata->filelen += di->bind_size;
2506 }
2507 if (di->weak_bind_size != 0)
2508 {
2509 di->weak_bind_off = mdata->filelen;
2510 mdata->filelen += di->weak_bind_size;
2511 }
2512 if (di->lazy_bind_size != 0)
2513 {
2514 di->lazy_bind_off = mdata->filelen;
2515 mdata->filelen += di->lazy_bind_size;
2516 }
2517 if (di->export_size != 0)
2518 {
2519 di->export_off = mdata->filelen;
2520 mdata->filelen += di->export_size;
2521 }
2522 }
2523 break;
2524 case BFD_MACH_O_LC_LOAD_DYLIB:
2525 case BFD_MACH_O_LC_LOAD_DYLINKER:
2526 case BFD_MACH_O_LC_MAIN:
2527 /* Nothing to do. */
2528 break;
2529 default:
2530 _bfd_error_handler
2531 (_("unable to allocate data for load command %#x"),
2532 cmd->type);
2533 break;
2534 }
2535
2536 /* Specially handle symtab and dysymtab. */
2537
2538 /* Pre-allocate the symbol table (but not the string table). The reason
2539 is that the dysymtab is after the symbol table but before the string
2540 table (required by the native strip tool). */
2541 if (symtab != NULL)
2542 {
2543 unsigned int symlen;
2544 unsigned int wide = bfd_mach_o_wide_p (abfd);
2545
2546 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2547
2548 /* Align for symbols. */
2549 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2550 symtab->symoff = mdata->filelen;
2551
2552 symtab->nsyms = bfd_get_symcount (abfd);
2553 mdata->filelen += symtab->nsyms * symlen;
2554 }
2555
2556 /* Build the dysymtab. */
2557 if (dysymtab != NULL)
2558 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2559 return FALSE;
2560
2561 /* Write symtab and strtab. */
2562 if (symtab != NULL)
2563 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2564 return FALSE;
2565
2566 /* Adjust linkedit size. */
2567 if (linkedit != NULL)
2568 {
2569 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2570
2571 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2572 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2573 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2574
2575 linkedit->initprot = BFD_MACH_O_PROT_READ;
2576 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2577 | BFD_MACH_O_PROT_EXECUTE;
2578 }
2579
2580 /* Second pass: write commands. */
2581 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2582 {
2583 struct mach_o_load_command_external raw;
2584 unsigned long typeflag;
2585
2586 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2587
2588 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2589 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2590
2591 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2592 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2593 return FALSE;
2594
2595 switch (cmd->type)
2596 {
2597 case BFD_MACH_O_LC_SEGMENT:
2598 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2599 return FALSE;
2600 break;
2601 case BFD_MACH_O_LC_SEGMENT_64:
2602 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2603 return FALSE;
2604 break;
2605 case BFD_MACH_O_LC_SYMTAB:
2606 if (!bfd_mach_o_write_symtab (abfd, cmd))
2607 return FALSE;
2608 break;
2609 case BFD_MACH_O_LC_DYSYMTAB:
2610 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2611 return FALSE;
2612 break;
2613 case BFD_MACH_O_LC_THREAD:
2614 case BFD_MACH_O_LC_UNIXTHREAD:
2615 if (!bfd_mach_o_write_thread (abfd, cmd))
2616 return FALSE;
2617 break;
2618 case BFD_MACH_O_LC_LOAD_DYLIB:
2619 if (!bfd_mach_o_write_dylib (abfd, cmd))
2620 return FALSE;
2621 break;
2622 case BFD_MACH_O_LC_LOAD_DYLINKER:
2623 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2624 return FALSE;
2625 break;
2626 case BFD_MACH_O_LC_MAIN:
2627 if (!bfd_mach_o_write_main (abfd, cmd))
2628 return FALSE;
2629 break;
2630 case BFD_MACH_O_LC_DYLD_INFO:
2631 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2632 return FALSE;
2633 break;
2634 default:
2635 _bfd_error_handler
2636 (_("unable to write unknown load command %#x"),
2637 cmd->type);
2638 return FALSE;
2639 }
2640 }
2641
2642 return TRUE;
2643 }
2644
2645 static void
2646 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2647 bfd_mach_o_section *s)
2648 {
2649 if (seg->sect_head == NULL)
2650 seg->sect_head = s;
2651 else
2652 seg->sect_tail->next = s;
2653 seg->sect_tail = s;
2654 }
2655
2656 /* Create section Mach-O flags from BFD flags. */
2657
2658 static void
2659 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2660 asection *sec)
2661 {
2662 flagword bfd_flags;
2663 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2664
2665 /* Create default flags. */
2666 bfd_flags = bfd_get_section_flags (abfd, sec);
2667 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2668 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2669 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2670 | BFD_MACH_O_S_REGULAR;
2671 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2672 s->flags = BFD_MACH_O_S_ZEROFILL;
2673 else if (bfd_flags & SEC_DEBUGGING)
2674 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2675 else
2676 s->flags = BFD_MACH_O_S_REGULAR;
2677 }
2678
2679 static bfd_boolean
2680 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2681 {
2682 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2683 unsigned int i, j;
2684
2685 seg->vmaddr = 0;
2686 seg->fileoff = mdata->filelen;
2687 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2688 | BFD_MACH_O_PROT_EXECUTE;
2689 seg->maxprot = seg->initprot;
2690
2691 /* Append sections to the segment.
2692
2693 This is a little tedious, we have to honor the need to account zerofill
2694 sections after all the rest. This forces us to do the calculation of
2695 total vmsize in three passes so that any alignment increments are
2696 properly accounted. */
2697 for (i = 0; i < mdata->nsects; ++i)
2698 {
2699 bfd_mach_o_section *s = mdata->sections[i];
2700 asection *sec = s->bfdsection;
2701
2702 /* Although we account for zerofill section sizes in vm order, they are
2703 placed in the file in source sequence. */
2704 bfd_mach_o_append_section_to_segment (seg, s);
2705 s->offset = 0;
2706
2707 /* Zerofill sections have zero file size & offset, the only content
2708 written to the file is the symbols. */
2709 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2710 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2711 == BFD_MACH_O_S_GB_ZEROFILL))
2712 continue;
2713
2714 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2715 sections, even those with zero size. */
2716 if (s->size > 0)
2717 {
2718 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2719 seg->vmsize += s->size;
2720
2721 /* MH_OBJECT files have unaligned content. */
2722 if (1)
2723 {
2724 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2725 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2726 }
2727 seg->filesize += s->size;
2728
2729 /* The system tools write even zero-sized sections with an offset
2730 field set to the current file position. */
2731 s->offset = mdata->filelen;
2732 }
2733
2734 sec->filepos = s->offset;
2735 mdata->filelen += s->size;
2736 }
2737
2738 /* Now pass through again, for zerofill, only now we just update the
2739 vmsize, and then for zerofill_GB. */
2740 for (j = 0; j < 2; j++)
2741 {
2742 unsigned int stype;
2743
2744 if (j == 0)
2745 stype = BFD_MACH_O_S_ZEROFILL;
2746 else
2747 stype = BFD_MACH_O_S_GB_ZEROFILL;
2748
2749 for (i = 0; i < mdata->nsects; ++i)
2750 {
2751 bfd_mach_o_section *s = mdata->sections[i];
2752
2753 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2754 continue;
2755
2756 if (s->size > 0)
2757 {
2758 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2759 seg->vmsize += s->size;
2760 }
2761 }
2762 }
2763
2764 /* Allocate space for the relocations. */
2765 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2766
2767 for (i = 0; i < mdata->nsects; ++i)
2768 {
2769 bfd_mach_o_section *ms = mdata->sections[i];
2770 asection *sec = ms->bfdsection;
2771
2772 ms->nreloc = sec->reloc_count;
2773 if (ms->nreloc == 0)
2774 {
2775 /* Clear nreloc and reloff if there is no relocs. */
2776 ms->reloff = 0;
2777 continue;
2778 }
2779 sec->rel_filepos = mdata->filelen;
2780 ms->reloff = sec->rel_filepos;
2781 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2782 }
2783
2784 return TRUE;
2785 }
2786
2787 static bfd_boolean
2788 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2789 {
2790 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2791 unsigned int i;
2792 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2793 bfd_vma vma;
2794 bfd_mach_o_section *s;
2795
2796 seg->vmsize = 0;
2797
2798 seg->fileoff = mdata->filelen;
2799 seg->maxprot = 0;
2800 seg->initprot = 0;
2801 seg->flags = 0;
2802
2803 /* Append sections to the segment. We assume they are properly ordered
2804 by vma (but we check that). */
2805 vma = 0;
2806 for (i = 0; i < mdata->nsects; ++i)
2807 {
2808 s = mdata->sections[i];
2809
2810 /* Consider only sections for this segment. */
2811 if (strcmp (seg->segname, s->segname) != 0)
2812 continue;
2813
2814 bfd_mach_o_append_section_to_segment (seg, s);
2815
2816 if (s->addr < vma)
2817 {
2818 _bfd_error_handler
2819 /* xgettext:c-format */
2820 (_("section address (%#" PRIx64 ") "
2821 "below start of segment (%#" PRIx64 ")"),
2822 (uint64_t) s->addr, (uint64_t) vma);
2823 return FALSE;
2824 }
2825
2826 vma = s->addr + s->size;
2827 }
2828
2829 /* Set segment file offset: make it page aligned. */
2830 vma = seg->sect_head->addr;
2831 seg->vmaddr = vma & ~pagemask;
2832 if ((mdata->filelen & pagemask) > (vma & pagemask))
2833 mdata->filelen += pagemask + 1;
2834 seg->fileoff = mdata->filelen & ~pagemask;
2835 mdata->filelen = seg->fileoff + (vma & pagemask);
2836
2837 /* Set section file offset. */
2838 for (s = seg->sect_head; s != NULL; s = s->next)
2839 {
2840 asection *sec = s->bfdsection;
2841 flagword flags = bfd_get_section_flags (abfd, sec);
2842
2843 /* Adjust segment size. */
2844 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2845 seg->vmsize += s->size;
2846
2847 /* File offset and length. */
2848 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2849
2850 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2851 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2852 != BFD_MACH_O_S_GB_ZEROFILL))
2853 {
2854 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2855
2856 s->offset = mdata->filelen;
2857 s->bfdsection->filepos = s->offset;
2858
2859 seg->filesize += s->size;
2860 mdata->filelen += s->size;
2861 }
2862 else
2863 {
2864 s->offset = 0;
2865 s->bfdsection->filepos = 0;
2866 }
2867
2868 /* Set protection. */
2869 if (flags & SEC_LOAD)
2870 {
2871 if (flags & SEC_CODE)
2872 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2873 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2874 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2875 }
2876
2877 /* Relocs shouldn't appear in non-object files. */
2878 if (s->bfdsection->reloc_count != 0)
2879 return FALSE;
2880 }
2881
2882 /* Set maxprot. */
2883 if (seg->initprot != 0)
2884 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2885 | BFD_MACH_O_PROT_EXECUTE;
2886 else
2887 seg->maxprot = 0;
2888
2889 /* Round segment size (and file size). */
2890 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2891 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2892 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2893
2894 return TRUE;
2895 }
2896
2897 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2898 fields in header. */
2899
2900 static bfd_boolean
2901 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2902 {
2903 unsigned wide = mach_o_wide_p (&mdata->header);
2904 unsigned int hdrlen;
2905 ufile_ptr offset;
2906 bfd_mach_o_load_command *cmd;
2907 unsigned int align;
2908 bfd_boolean ret = TRUE;
2909
2910 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2911 align = wide ? 8 - 1 : 4 - 1;
2912 offset = hdrlen;
2913 mdata->header.ncmds = 0;
2914
2915 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2916 {
2917 mdata->header.ncmds++;
2918 cmd->offset = offset;
2919
2920 switch (cmd->type)
2921 {
2922 case BFD_MACH_O_LC_SEGMENT_64:
2923 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2924 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2925 break;
2926 case BFD_MACH_O_LC_SEGMENT:
2927 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2928 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2929 break;
2930 case BFD_MACH_O_LC_SYMTAB:
2931 cmd->len = sizeof (struct mach_o_symtab_command_external)
2932 + BFD_MACH_O_LC_SIZE;
2933 break;
2934 case BFD_MACH_O_LC_DYSYMTAB:
2935 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2936 + BFD_MACH_O_LC_SIZE;
2937 break;
2938 case BFD_MACH_O_LC_LOAD_DYLIB:
2939 cmd->len = sizeof (struct mach_o_dylib_command_external)
2940 + BFD_MACH_O_LC_SIZE;
2941 cmd->command.dylib.name_offset = cmd->len;
2942 cmd->len += strlen (cmd->command.dylib.name_str);
2943 cmd->len = (cmd->len + align) & ~align;
2944 break;
2945 case BFD_MACH_O_LC_LOAD_DYLINKER:
2946 cmd->len = sizeof (struct mach_o_str_command_external)
2947 + BFD_MACH_O_LC_SIZE;
2948 cmd->command.dylinker.name_offset = cmd->len;
2949 cmd->len += strlen (cmd->command.dylinker.name_str);
2950 cmd->len = (cmd->len + align) & ~align;
2951 break;
2952 case BFD_MACH_O_LC_MAIN:
2953 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2954 + BFD_MACH_O_LC_SIZE;
2955 break;
2956 case BFD_MACH_O_LC_DYLD_INFO:
2957 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2958 + BFD_MACH_O_LC_SIZE;
2959 break;
2960 default:
2961 _bfd_error_handler
2962 (_("unable to layout unknown load command %#x"),
2963 cmd->type);
2964 ret = FALSE;
2965 break;
2966 }
2967
2968 BFD_ASSERT (cmd->len % (align + 1) == 0);
2969 offset += cmd->len;
2970 }
2971 mdata->header.sizeofcmds = offset - hdrlen;
2972 mdata->filelen = offset;
2973
2974 return ret;
2975 }
2976
2977 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2978 segment. */
2979
2980 static void
2981 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2982 bfd_mach_o_load_command *cmd,
2983 const char *segname, unsigned int nbr_sect)
2984 {
2985 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2986 unsigned wide = mach_o_wide_p (&mdata->header);
2987
2988 /* Init segment command. */
2989 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2990 cmd->type_required = FALSE;
2991
2992 strcpy (seg->segname, segname);
2993 seg->nsects = nbr_sect;
2994
2995 seg->vmaddr = 0;
2996 seg->vmsize = 0;
2997
2998 seg->fileoff = 0;
2999 seg->filesize = 0;
3000 seg->maxprot = 0;
3001 seg->initprot = 0;
3002 seg->flags = 0;
3003 seg->sect_head = NULL;
3004 seg->sect_tail = NULL;
3005 }
3006
3007 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3008 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3009 and copy functionality. */
3010
3011 bfd_boolean
3012 bfd_mach_o_build_commands (bfd *abfd)
3013 {
3014 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3015 unsigned wide = mach_o_wide_p (&mdata->header);
3016 unsigned int nbr_segcmd = 0;
3017 bfd_mach_o_load_command *commands;
3018 unsigned int nbr_commands;
3019 int symtab_idx = -1;
3020 int dysymtab_idx = -1;
3021 int main_idx = -1;
3022 unsigned int i;
3023
3024 /* Return now if already built. */
3025 if (mdata->header.ncmds != 0)
3026 return TRUE;
3027
3028 /* Fill in the file type, if not already set. */
3029 if (mdata->header.filetype == 0)
3030 {
3031 if (abfd->flags & EXEC_P)
3032 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3033 else if (abfd->flags & DYNAMIC)
3034 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3035 else
3036 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3037 }
3038
3039 /* If hasn't already been done, flatten sections list, and sort
3040 if/when required. Must be done before the symbol table is adjusted,
3041 since that depends on properly numbered sections. */
3042 if (mdata->nsects == 0 || mdata->sections == NULL)
3043 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3044 return FALSE;
3045
3046 /* Order the symbol table, fill-in/check mach-o specific fields and
3047 partition out any indirect symbols. */
3048 if (!bfd_mach_o_mangle_symbols (abfd))
3049 return FALSE;
3050
3051 /* Segment commands. */
3052 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3053 {
3054 /* Only one segment for all the sections. But the segment is
3055 optional if there is no sections. */
3056 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3057 }
3058 else
3059 {
3060 bfd_mach_o_section *prev_sect = NULL;
3061
3062 /* One pagezero segment and one linkedit segment. */
3063 nbr_segcmd = 2;
3064
3065 /* Create one segment for associated segment name in sections.
3066 Assume that sections with the same segment name are consecutive. */
3067 for (i = 0; i < mdata->nsects; i++)
3068 {
3069 bfd_mach_o_section *this_sect = mdata->sections[i];
3070
3071 if (prev_sect == NULL
3072 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3073 {
3074 nbr_segcmd++;
3075 prev_sect = this_sect;
3076 }
3077 }
3078 }
3079
3080 nbr_commands = nbr_segcmd;
3081
3082 /* One command for the symbol table (only if there are symbols. */
3083 if (bfd_get_symcount (abfd) > 0)
3084 symtab_idx = nbr_commands++;
3085
3086 /* FIXME:
3087 This is a rather crude test for whether we should build a dysymtab. */
3088 if (bfd_mach_o_should_emit_dysymtab ()
3089 && bfd_get_symcount (abfd))
3090 {
3091 /* If there should be a case where a dysymtab could be emitted without
3092 a symtab (seems improbable), this would need amending. */
3093 dysymtab_idx = nbr_commands++;
3094 }
3095
3096 /* Add an entry point command. */
3097 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3098 && bfd_get_start_address (abfd) != 0)
3099 main_idx = nbr_commands++;
3100
3101 /* Well, we must have a header, at least. */
3102 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3103
3104 /* A bit unusual, but no content is valid;
3105 as -n empty.s -o empty.o */
3106 if (nbr_commands == 0)
3107 {
3108 /* Layout commands (well none...) and set headers command fields. */
3109 return bfd_mach_o_layout_commands (mdata);
3110 }
3111
3112 /* Create commands for segments (and symtabs), prepend them. */
3113 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3114 if (commands == NULL)
3115 return FALSE;
3116 for (i = 0; i < nbr_commands - 1; i++)
3117 commands[i].next = &commands[i + 1];
3118 commands[nbr_commands - 1].next = mdata->first_command;
3119 if (mdata->first_command == NULL)
3120 mdata->last_command = &commands[nbr_commands - 1];
3121 mdata->first_command = &commands[0];
3122
3123 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3124 {
3125 /* For object file, there is only one segment. */
3126 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3127 }
3128 else if (nbr_segcmd != 0)
3129 {
3130 bfd_mach_o_load_command *cmd;
3131
3132 BFD_ASSERT (nbr_segcmd >= 2);
3133
3134 /* The pagezero. */
3135 cmd = &commands[0];
3136 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3137
3138 /* Segments from sections. */
3139 cmd++;
3140 for (i = 0; i < mdata->nsects;)
3141 {
3142 const char *segname = mdata->sections[i]->segname;
3143 unsigned int nbr_sect = 1;
3144
3145 /* Count number of sections for this segment. */
3146 for (i++; i < mdata->nsects; i++)
3147 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3148 nbr_sect++;
3149 else
3150 break;
3151
3152 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3153 cmd++;
3154 }
3155
3156 /* The linkedit. */
3157 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3158 }
3159
3160 if (symtab_idx >= 0)
3161 {
3162 /* Init symtab command. */
3163 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3164
3165 cmd->type = BFD_MACH_O_LC_SYMTAB;
3166 cmd->type_required = FALSE;
3167 }
3168
3169 /* If required, setup symtab command, see comment above about the quality
3170 of this test. */
3171 if (dysymtab_idx >= 0)
3172 {
3173 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3174
3175 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3176 cmd->type_required = FALSE;
3177 }
3178
3179 /* Create the main command. */
3180 if (main_idx >= 0)
3181 {
3182 bfd_mach_o_load_command *cmd = &commands[main_idx];
3183
3184 cmd->type = BFD_MACH_O_LC_MAIN;
3185 cmd->type_required = TRUE;
3186
3187 cmd->command.main.entryoff = 0;
3188 cmd->command.main.stacksize = 0;
3189 }
3190
3191 /* Layout commands. */
3192 if (! bfd_mach_o_layout_commands (mdata))
3193 return FALSE;
3194
3195 /* So, now we have sized the commands and the filelen set to that.
3196 Now we can build the segment command and set the section file offsets. */
3197 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3198 {
3199 for (i = 0; i < nbr_segcmd; i++)
3200 if (!bfd_mach_o_build_obj_seg_command
3201 (abfd, &commands[i].command.segment))
3202 return FALSE;
3203 }
3204 else
3205 {
3206 bfd_vma maxvma = 0;
3207
3208 /* Skip pagezero and linkedit segments. */
3209 for (i = 1; i < nbr_segcmd - 1; i++)
3210 {
3211 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3212
3213 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3214 return FALSE;
3215
3216 if (seg->vmaddr + seg->vmsize > maxvma)
3217 maxvma = seg->vmaddr + seg->vmsize;
3218 }
3219
3220 /* Set the size of __PAGEZERO. */
3221 commands[0].command.segment.vmsize =
3222 commands[1].command.segment.vmaddr;
3223
3224 /* Set the vma and fileoff of __LINKEDIT. */
3225 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3226 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3227
3228 /* Set entry point (once segments have been laid out). */
3229 if (main_idx >= 0)
3230 commands[main_idx].command.main.entryoff =
3231 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3232 }
3233
3234 return TRUE;
3235 }
3236
3237 /* Set the contents of a section. */
3238
3239 bfd_boolean
3240 bfd_mach_o_set_section_contents (bfd *abfd,
3241 asection *section,
3242 const void * location,
3243 file_ptr offset,
3244 bfd_size_type count)
3245 {
3246 file_ptr pos;
3247
3248 /* Trying to write the first section contents will trigger the creation of
3249 the load commands if they are not already present. */
3250 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3251 return FALSE;
3252
3253 if (count == 0)
3254 return TRUE;
3255
3256 pos = section->filepos + offset;
3257 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3258 || bfd_bwrite (location, count, abfd) != count)
3259 return FALSE;
3260
3261 return TRUE;
3262 }
3263
3264 int
3265 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3266 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3267 {
3268 return 0;
3269 }
3270
3271 /* Make an empty symbol. This is required only because
3272 bfd_make_section_anyway wants to create a symbol for the section. */
3273
3274 asymbol *
3275 bfd_mach_o_make_empty_symbol (bfd *abfd)
3276 {
3277 asymbol *new_symbol;
3278
3279 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3280 if (new_symbol == NULL)
3281 return new_symbol;
3282 new_symbol->the_bfd = abfd;
3283 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3284 return new_symbol;
3285 }
3286
3287 static bfd_boolean
3288 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3289 {
3290 struct mach_o_header_external raw;
3291 unsigned int size;
3292 bfd_vma (*get32) (const void *) = NULL;
3293
3294 /* Just read the magic number. */
3295 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3296 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3297 return FALSE;
3298
3299 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3300 {
3301 header->byteorder = BFD_ENDIAN_BIG;
3302 header->magic = BFD_MACH_O_MH_MAGIC;
3303 header->version = 1;
3304 get32 = bfd_getb32;
3305 }
3306 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3307 {
3308 header->byteorder = BFD_ENDIAN_LITTLE;
3309 header->magic = BFD_MACH_O_MH_MAGIC;
3310 header->version = 1;
3311 get32 = bfd_getl32;
3312 }
3313 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3314 {
3315 header->byteorder = BFD_ENDIAN_BIG;
3316 header->magic = BFD_MACH_O_MH_MAGIC_64;
3317 header->version = 2;
3318 get32 = bfd_getb32;
3319 }
3320 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3321 {
3322 header->byteorder = BFD_ENDIAN_LITTLE;
3323 header->magic = BFD_MACH_O_MH_MAGIC_64;
3324 header->version = 2;
3325 get32 = bfd_getl32;
3326 }
3327 else
3328 {
3329 header->byteorder = BFD_ENDIAN_UNKNOWN;
3330 return FALSE;
3331 }
3332
3333 /* Once the size of the header is known, read the full header. */
3334 size = mach_o_wide_p (header) ?
3335 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3336
3337 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3338 || bfd_bread (&raw, size, abfd) != size)
3339 return FALSE;
3340
3341 header->cputype = (*get32) (raw.cputype);
3342 header->cpusubtype = (*get32) (raw.cpusubtype);
3343 header->filetype = (*get32) (raw.filetype);
3344 header->ncmds = (*get32) (raw.ncmds);
3345 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3346 header->flags = (*get32) (raw.flags);
3347
3348 if (mach_o_wide_p (header))
3349 header->reserved = (*get32) (raw.reserved);
3350 else
3351 header->reserved = 0;
3352
3353 return TRUE;
3354 }
3355
3356 bfd_boolean
3357 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3358 {
3359 bfd_mach_o_section *s;
3360 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3361
3362 s = bfd_mach_o_get_mach_o_section (sec);
3363 if (s == NULL)
3364 {
3365 flagword bfd_flags;
3366 static const mach_o_section_name_xlat * xlat;
3367
3368 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3369 if (s == NULL)
3370 return FALSE;
3371 sec->used_by_bfd = s;
3372 s->bfdsection = sec;
3373
3374 /* Create the Darwin seg/sect name pair from the bfd name.
3375 If this is a canonical name for which a specific paiting exists
3376 there will also be defined flags, type, attribute and alignment
3377 values. */
3378 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3379 if (xlat != NULL)
3380 {
3381 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3382 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3383 : bfdalign;
3384 (void) bfd_set_section_alignment (abfd, sec, s->align);
3385 bfd_flags = bfd_get_section_flags (abfd, sec);
3386 if (bfd_flags == SEC_NO_FLAGS)
3387 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3388 }
3389 else
3390 /* Create default flags. */
3391 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3392 }
3393
3394 return _bfd_generic_new_section_hook (abfd, sec);
3395 }
3396
3397 static void
3398 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3399 unsigned long prot)
3400 {
3401 flagword flags;
3402 bfd_mach_o_section *section;
3403
3404 flags = bfd_get_section_flags (abfd, sec);
3405 section = bfd_mach_o_get_mach_o_section (sec);
3406
3407 /* TODO: see if we should use the xlat system for doing this by
3408 preference and fall back to this for unknown sections. */
3409
3410 if (flags == SEC_NO_FLAGS)
3411 {
3412 /* Try to guess flags. */
3413 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3414 flags = SEC_DEBUGGING;
3415 else
3416 {
3417 flags = SEC_ALLOC;
3418 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3419 != BFD_MACH_O_S_ZEROFILL)
3420 {
3421 flags |= SEC_LOAD;
3422 if (prot & BFD_MACH_O_PROT_EXECUTE)
3423 flags |= SEC_CODE;
3424 if (prot & BFD_MACH_O_PROT_WRITE)
3425 flags |= SEC_DATA;
3426 else if (prot & BFD_MACH_O_PROT_READ)
3427 flags |= SEC_READONLY;
3428 }
3429 }
3430 }
3431 else
3432 {
3433 if ((flags & SEC_DEBUGGING) == 0)
3434 flags |= SEC_ALLOC;
3435 }
3436
3437 if (section->offset != 0)
3438 flags |= SEC_HAS_CONTENTS;
3439 if (section->nreloc != 0)
3440 flags |= SEC_RELOC;
3441
3442 bfd_set_section_flags (abfd, sec, flags);
3443
3444 sec->vma = section->addr;
3445 sec->lma = section->addr;
3446 sec->size = section->size;
3447 sec->filepos = section->offset;
3448 sec->alignment_power = section->align;
3449 sec->segment_mark = 0;
3450 sec->reloc_count = section->nreloc;
3451 sec->rel_filepos = section->reloff;
3452 }
3453
3454 static asection *
3455 bfd_mach_o_make_bfd_section (bfd *abfd,
3456 const unsigned char *segname,
3457 const unsigned char *sectname)
3458 {
3459 const char *sname;
3460 flagword flags;
3461
3462 bfd_mach_o_convert_section_name_to_bfd
3463 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3464 if (sname == NULL)
3465 return NULL;
3466
3467 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3468 }
3469
3470 static asection *
3471 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3472 {
3473 struct mach_o_section_32_external raw;
3474 asection *sec;
3475 bfd_mach_o_section *section;
3476
3477 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3478 != BFD_MACH_O_SECTION_SIZE)
3479 return NULL;
3480
3481 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3482 if (sec == NULL)
3483 return NULL;
3484
3485 section = bfd_mach_o_get_mach_o_section (sec);
3486 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3487 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3488 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3489 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3490 section->addr = bfd_h_get_32 (abfd, raw.addr);
3491 section->size = bfd_h_get_32 (abfd, raw.size);
3492 section->offset = bfd_h_get_32 (abfd, raw.offset);
3493 section->align = bfd_h_get_32 (abfd, raw.align);
3494 /* PR 17512: file: 0017eb76. */
3495 if (section->align > 64)
3496 {
3497 _bfd_error_handler
3498 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3499 "using 32 instead"), section->align);
3500 section->align = 32;
3501 }
3502 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3503 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3504 section->flags = bfd_h_get_32 (abfd, raw.flags);
3505 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3506 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3507 section->reserved3 = 0;
3508
3509 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3510
3511 return sec;
3512 }
3513
3514 static asection *
3515 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3516 {
3517 struct mach_o_section_64_external raw;
3518 asection *sec;
3519 bfd_mach_o_section *section;
3520
3521 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3522 != BFD_MACH_O_SECTION_64_SIZE)
3523 return NULL;
3524
3525 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3526 if (sec == NULL)
3527 return NULL;
3528
3529 section = bfd_mach_o_get_mach_o_section (sec);
3530 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3531 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3532 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3533 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3534 section->addr = bfd_h_get_64 (abfd, raw.addr);
3535 section->size = bfd_h_get_64 (abfd, raw.size);
3536 section->offset = bfd_h_get_32 (abfd, raw.offset);
3537 section->align = bfd_h_get_32 (abfd, raw.align);
3538 if (section->align > 64)
3539 {
3540 _bfd_error_handler
3541 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3542 "using 32 instead"), section->align);
3543 section->align = 32;
3544 }
3545 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3546 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3547 section->flags = bfd_h_get_32 (abfd, raw.flags);
3548 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3549 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3550 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3551
3552 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3553
3554 return sec;
3555 }
3556
3557 static asection *
3558 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3559 {
3560 if (wide)
3561 return bfd_mach_o_read_section_64 (abfd, prot);
3562 else
3563 return bfd_mach_o_read_section_32 (abfd, prot);
3564 }
3565
3566 static bfd_boolean
3567 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3568 bfd_mach_o_symtab_command *sym,
3569 bfd_mach_o_asymbol *s,
3570 unsigned long i)
3571 {
3572 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3573 unsigned int wide = mach_o_wide_p (&mdata->header);
3574 unsigned int symwidth =
3575 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3576 unsigned int symoff = sym->symoff + (i * symwidth);
3577 struct mach_o_nlist_64_external raw;
3578 unsigned char type = -1;
3579 unsigned char section = -1;
3580 short desc = -1;
3581 symvalue value = -1;
3582 unsigned long stroff = -1;
3583 unsigned int symtype = -1;
3584
3585 BFD_ASSERT (sym->strtab != NULL);
3586
3587 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3588 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3589 {
3590 _bfd_error_handler
3591 /* xgettext:c-format */
3592 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3593 symwidth, symoff);
3594 return FALSE;
3595 }
3596
3597 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3598 type = bfd_h_get_8 (abfd, raw.n_type);
3599 symtype = type & BFD_MACH_O_N_TYPE;
3600 section = bfd_h_get_8 (abfd, raw.n_sect);
3601 desc = bfd_h_get_16 (abfd, raw.n_desc);
3602 if (wide)
3603 value = bfd_h_get_64 (abfd, raw.n_value);
3604 else
3605 value = bfd_h_get_32 (abfd, raw.n_value);
3606
3607 if (stroff >= sym->strsize)
3608 {
3609 _bfd_error_handler
3610 /* xgettext:c-format */
3611 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3612 stroff,
3613 sym->strsize);
3614 return FALSE;
3615 }
3616
3617 s->symbol.the_bfd = abfd;
3618 s->symbol.name = sym->strtab + stroff;
3619 s->symbol.value = value;
3620 s->symbol.flags = 0x0;
3621 s->symbol.udata.i = i;
3622 s->n_type = type;
3623 s->n_sect = section;
3624 s->n_desc = desc;
3625
3626 if (type & BFD_MACH_O_N_STAB)
3627 {
3628 s->symbol.flags |= BSF_DEBUGGING;
3629 s->symbol.section = bfd_und_section_ptr;
3630 switch (type)
3631 {
3632 case N_FUN:
3633 case N_STSYM:
3634 case N_LCSYM:
3635 case N_BNSYM:
3636 case N_SLINE:
3637 case N_ENSYM:
3638 case N_ECOMM:
3639 case N_ECOML:
3640 case N_GSYM:
3641 if ((section > 0) && (section <= mdata->nsects))
3642 {
3643 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3644 s->symbol.value =
3645 s->symbol.value - mdata->sections[section - 1]->addr;
3646 }
3647 break;
3648 }
3649 }
3650 else
3651 {
3652 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3653 s->symbol.flags |= BSF_GLOBAL;
3654 else
3655 s->symbol.flags |= BSF_LOCAL;
3656
3657 switch (symtype)
3658 {
3659 case BFD_MACH_O_N_UNDF:
3660 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3661 && s->symbol.value != 0)
3662 {
3663 /* A common symbol. */
3664 s->symbol.section = bfd_com_section_ptr;
3665 s->symbol.flags = BSF_NO_FLAGS;
3666 }
3667 else
3668 {
3669 s->symbol.section = bfd_und_section_ptr;
3670 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3671 s->symbol.flags |= BSF_WEAK;
3672 }
3673 break;
3674 case BFD_MACH_O_N_PBUD:
3675 s->symbol.section = bfd_und_section_ptr;
3676 break;
3677 case BFD_MACH_O_N_ABS:
3678 s->symbol.section = bfd_abs_section_ptr;
3679 break;
3680 case BFD_MACH_O_N_SECT:
3681 if ((section > 0) && (section <= mdata->nsects))
3682 {
3683 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3684 s->symbol.value =
3685 s->symbol.value - mdata->sections[section - 1]->addr;
3686 }
3687 else
3688 {
3689 /* Mach-O uses 0 to mean "no section"; not an error. */
3690 if (section != 0)
3691 {
3692 _bfd_error_handler
3693 /* xgettext:c-format */
3694 (_("bfd_mach_o_read_symtab_symbol: "
3695 "symbol \"%s\" specified invalid section %d (max %lu): "
3696 "setting to undefined"),
3697 s->symbol.name, section, mdata->nsects);
3698 }
3699 s->symbol.section = bfd_und_section_ptr;
3700 }
3701 break;
3702 case BFD_MACH_O_N_INDR:
3703 /* FIXME: we don't follow the BFD convention as this indirect symbol
3704 won't be followed by the referenced one. This looks harmless
3705 unless we start using the linker. */
3706 s->symbol.flags |= BSF_INDIRECT;
3707 s->symbol.section = bfd_ind_section_ptr;
3708 s->symbol.value = 0;
3709 break;
3710 default:
3711 _bfd_error_handler
3712 /* xgettext:c-format */
3713 (_("bfd_mach_o_read_symtab_symbol: "
3714 "symbol \"%s\" specified invalid type field 0x%x: "
3715 "setting to undefined"), s->symbol.name, symtype);
3716 s->symbol.section = bfd_und_section_ptr;
3717 break;
3718 }
3719 }
3720
3721 return TRUE;
3722 }
3723
3724 bfd_boolean
3725 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3726 {
3727 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3728 bfd_mach_o_symtab_command *sym = mdata->symtab;
3729
3730 /* Fail if there is no symtab. */
3731 if (sym == NULL)
3732 return FALSE;
3733
3734 /* Success if already loaded. */
3735 if (sym->strtab)
3736 return TRUE;
3737
3738 if (abfd->flags & BFD_IN_MEMORY)
3739 {
3740 struct bfd_in_memory *b;
3741
3742 b = (struct bfd_in_memory *) abfd->iostream;
3743
3744 if ((sym->stroff + sym->strsize) > b->size)
3745 {
3746 bfd_set_error (bfd_error_file_truncated);
3747 return FALSE;
3748 }
3749 sym->strtab = (char *) b->buffer + sym->stroff;
3750 }
3751 else
3752 {
3753 /* See PR 21840 for a reproducer. */
3754 if ((sym->strsize + 1) == 0)
3755 return FALSE;
3756 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3757 if (sym->strtab == NULL)
3758 return FALSE;
3759
3760 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3761 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3762 {
3763 /* PR 17512: file: 10888-1609-0.004. */
3764 bfd_release (abfd, sym->strtab);
3765 sym->strtab = NULL;
3766 bfd_set_error (bfd_error_file_truncated);
3767 return FALSE;
3768 }
3769 /* Zero terminate the string table. */
3770 sym->strtab[sym->strsize] = 0;
3771 }
3772
3773 return TRUE;
3774 }
3775
3776 bfd_boolean
3777 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3778 {
3779 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3780 bfd_mach_o_symtab_command *sym = mdata->symtab;
3781 unsigned long i;
3782
3783 if (sym == NULL || sym->symbols)
3784 /* Return now if there are no symbols or if already loaded. */
3785 return TRUE;
3786
3787 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3788 if (sym->symbols == NULL)
3789 {
3790 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3791 "unable to allocate memory for symbols"));
3792 sym->nsyms = 0;
3793 return FALSE;
3794 }
3795
3796 if (!bfd_mach_o_read_symtab_strtab (abfd))
3797 goto fail;
3798
3799 for (i = 0; i < sym->nsyms; i++)
3800 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3801 goto fail;
3802
3803 return TRUE;
3804
3805 fail:
3806 bfd_release (abfd, sym->symbols);
3807 sym->symbols = NULL;
3808 sym->nsyms = 0;
3809 return FALSE;
3810 }
3811
3812 static const char *
3813 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3814 {
3815 switch ((int) flavour)
3816 {
3817 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3818 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3819 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3820 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3821 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3822 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3823 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3824 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3825 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3826 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3827 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3828 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3829 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3830 default: return "UNKNOWN";
3831 }
3832 }
3833
3834 static const char *
3835 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3836 {
3837 switch ((int) flavour)
3838 {
3839 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3840 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3841 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3842 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3843 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3844 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3845 default: return "UNKNOWN";
3846 }
3847 }
3848
3849 static bfd_boolean
3850 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3851 {
3852 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3853 struct mach_o_str_command_external raw;
3854 unsigned int nameoff;
3855 unsigned int namelen;
3856
3857 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3858 return FALSE;
3859
3860 nameoff = bfd_h_get_32 (abfd, raw.str);
3861
3862 cmd->name_offset = nameoff;
3863 namelen = command->len - nameoff;
3864 nameoff += command->offset;
3865 cmd->name_str = bfd_alloc (abfd, namelen);
3866 if (cmd->name_str == NULL)
3867 return FALSE;
3868 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3869 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3870 return FALSE;
3871 return TRUE;
3872 }
3873
3874 static bfd_boolean
3875 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3876 {
3877 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3878 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3879 struct mach_o_dylib_command_external raw;
3880 unsigned int nameoff;
3881 unsigned int namelen;
3882
3883 switch (command->type)
3884 {
3885 case BFD_MACH_O_LC_LOAD_DYLIB:
3886 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3887 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3888 case BFD_MACH_O_LC_ID_DYLIB:
3889 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3890 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3891 break;
3892 default:
3893 BFD_FAIL ();
3894 return FALSE;
3895 }
3896
3897 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3898 return FALSE;
3899
3900 nameoff = bfd_h_get_32 (abfd, raw.name);
3901 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3902 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3903 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3904
3905 cmd->name_offset = command->offset + nameoff;
3906 namelen = command->len - nameoff;
3907 cmd->name_str = bfd_alloc (abfd, namelen);
3908 if (cmd->name_str == NULL)
3909 return FALSE;
3910 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
3911 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3912 return FALSE;
3913 return TRUE;
3914 }
3915
3916 static bfd_boolean
3917 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3918 bfd_mach_o_load_command *command)
3919 {
3920 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3921 struct mach_o_prebound_dylib_command_external raw;
3922 unsigned int nameoff;
3923 unsigned int modoff;
3924 unsigned int str_len;
3925 unsigned char *str;
3926
3927 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3928 return FALSE;
3929
3930 nameoff = bfd_h_get_32 (abfd, raw.name);
3931 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3932 if (nameoff > command->len || modoff > command->len)
3933 return FALSE;
3934
3935 str_len = command->len - sizeof (raw);
3936 str = bfd_alloc (abfd, str_len);
3937 if (str == NULL)
3938 return FALSE;
3939 if (bfd_bread (str, str_len, abfd) != str_len)
3940 return FALSE;
3941
3942 cmd->name_offset = command->offset + nameoff;
3943 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3944 cmd->linked_modules_offset = command->offset + modoff;
3945
3946 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3947 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3948 return TRUE;
3949 }
3950
3951 static bfd_boolean
3952 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3953 bfd_mach_o_load_command *command)
3954 {
3955 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3956 struct mach_o_prebind_cksum_command_external raw;
3957
3958 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3959 return FALSE;
3960
3961 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3962 return TRUE;
3963 }
3964
3965 static bfd_boolean
3966 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3967 bfd_mach_o_load_command *command)
3968 {
3969 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3970 struct mach_o_twolevel_hints_command_external raw;
3971
3972 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3973 return FALSE;
3974
3975 cmd->offset = bfd_get_32 (abfd, raw.offset);
3976 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3977 return TRUE;
3978 }
3979
3980 static bfd_boolean
3981 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3982 {
3983 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3984 struct mach_o_fvmlib_command_external raw;
3985 unsigned int nameoff;
3986 unsigned int namelen;
3987
3988 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3989 return FALSE;
3990
3991 nameoff = bfd_h_get_32 (abfd, raw.name);
3992 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3993 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3994
3995 fvm->name_offset = command->offset + nameoff;
3996 namelen = command->len - nameoff;
3997 fvm->name_str = bfd_alloc (abfd, namelen);
3998 if (fvm->name_str == NULL)
3999 return FALSE;
4000 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
4001 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
4002 return FALSE;
4003 return TRUE;
4004 }
4005
4006 static bfd_boolean
4007 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4008 {
4009 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4010 bfd_mach_o_thread_command *cmd = &command->command.thread;
4011 unsigned int offset;
4012 unsigned int nflavours;
4013 unsigned int i;
4014
4015 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4016 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4017
4018 /* Count the number of threads. */
4019 offset = 8;
4020 nflavours = 0;
4021 while (offset != command->len)
4022 {
4023 struct mach_o_thread_command_external raw;
4024
4025 if (offset >= command->len)
4026 return FALSE;
4027
4028 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4029 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4030 return FALSE;
4031
4032 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
4033 nflavours++;
4034 }
4035
4036 /* Allocate threads. */
4037 cmd->flavours = bfd_alloc2
4038 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4039 if (cmd->flavours == NULL)
4040 return FALSE;
4041 cmd->nflavours = nflavours;
4042
4043 offset = 8;
4044 nflavours = 0;
4045 while (offset != command->len)
4046 {
4047 struct mach_o_thread_command_external raw;
4048
4049 if (offset >= command->len)
4050 return FALSE;
4051
4052 if (nflavours >= cmd->nflavours)
4053 return FALSE;
4054
4055 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4056 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4057 return FALSE;
4058
4059 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4060 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4061 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4062 offset += cmd->flavours[nflavours].size + sizeof (raw);
4063 nflavours++;
4064 }
4065
4066 for (i = 0; i < nflavours; i++)
4067 {
4068 asection *bfdsec;
4069 unsigned int snamelen;
4070 char *sname;
4071 const char *flavourstr;
4072 const char *prefix = "LC_THREAD";
4073 unsigned int j = 0;
4074
4075 switch (mdata->header.cputype)
4076 {
4077 case BFD_MACH_O_CPU_TYPE_POWERPC:
4078 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4079 flavourstr =
4080 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4081 break;
4082 case BFD_MACH_O_CPU_TYPE_I386:
4083 case BFD_MACH_O_CPU_TYPE_X86_64:
4084 flavourstr =
4085 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4086 break;
4087 default:
4088 flavourstr = "UNKNOWN_ARCHITECTURE";
4089 break;
4090 }
4091
4092 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4093 sname = bfd_alloc (abfd, snamelen);
4094 if (sname == NULL)
4095 return FALSE;
4096
4097 for (;;)
4098 {
4099 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4100 if (bfd_get_section_by_name (abfd, sname) == NULL)
4101 break;
4102 j++;
4103 }
4104
4105 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4106
4107 bfdsec->vma = 0;
4108 bfdsec->lma = 0;
4109 bfdsec->size = cmd->flavours[i].size;
4110 bfdsec->filepos = cmd->flavours[i].offset;
4111 bfdsec->alignment_power = 0x0;
4112
4113 cmd->section = bfdsec;
4114 }
4115
4116 return TRUE;
4117 }
4118
4119 static bfd_boolean
4120 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4121 {
4122 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4123 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4124
4125 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4126
4127 {
4128 struct mach_o_dysymtab_command_external raw;
4129
4130 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4131 return FALSE;
4132
4133 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4134 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4135 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4136 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4137 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4138 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4139 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4140 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4141 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4142 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4143 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4144 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4145 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4146 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4147 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4148 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4149 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4150 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4151 }
4152
4153 if (cmd->nmodtab != 0)
4154 {
4155 unsigned int i;
4156 int wide = bfd_mach_o_wide_p (abfd);
4157 unsigned int module_len = wide ? 56 : 52;
4158
4159 cmd->dylib_module =
4160 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4161 if (cmd->dylib_module == NULL)
4162 return FALSE;
4163
4164 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4165 return FALSE;
4166
4167 for (i = 0; i < cmd->nmodtab; i++)
4168 {
4169 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4170 unsigned long v;
4171 unsigned char buf[56];
4172
4173 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4174 return FALSE;
4175
4176 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4177 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4178 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4179 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4180 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4181 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4182 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4183 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4184 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4185 v = bfd_h_get_32 (abfd, buf +36);
4186 module->iinit = v & 0xffff;
4187 module->iterm = (v >> 16) & 0xffff;
4188 v = bfd_h_get_32 (abfd, buf + 40);
4189 module->ninit = v & 0xffff;
4190 module->nterm = (v >> 16) & 0xffff;
4191 if (wide)
4192 {
4193 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4194 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4195 }
4196 else
4197 {
4198 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4199 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4200 }
4201 }
4202 }
4203
4204 if (cmd->ntoc != 0)
4205 {
4206 unsigned long i;
4207
4208 cmd->dylib_toc = bfd_alloc2
4209 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4210 if (cmd->dylib_toc == NULL)
4211 return FALSE;
4212
4213 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4214 return FALSE;
4215
4216 for (i = 0; i < cmd->ntoc; i++)
4217 {
4218 struct mach_o_dylib_table_of_contents_external raw;
4219 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4220
4221 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4222 return FALSE;
4223
4224 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4225 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4226 }
4227 }
4228
4229 if (cmd->nindirectsyms != 0)
4230 {
4231 unsigned int i;
4232
4233 cmd->indirect_syms = bfd_alloc2
4234 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4235 if (cmd->indirect_syms == NULL)
4236 return FALSE;
4237
4238 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4239 return FALSE;
4240
4241 for (i = 0; i < cmd->nindirectsyms; i++)
4242 {
4243 unsigned char raw[4];
4244 unsigned int *is = &cmd->indirect_syms[i];
4245
4246 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4247 return FALSE;
4248
4249 *is = bfd_h_get_32 (abfd, raw);
4250 }
4251 }
4252
4253 if (cmd->nextrefsyms != 0)
4254 {
4255 unsigned long v;
4256 unsigned int i;
4257
4258 cmd->ext_refs = bfd_alloc2
4259 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4260 if (cmd->ext_refs == NULL)
4261 return FALSE;
4262
4263 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4264 return FALSE;
4265
4266 for (i = 0; i < cmd->nextrefsyms; i++)
4267 {
4268 unsigned char raw[4];
4269 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4270
4271 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4272 return FALSE;
4273
4274 /* Fields isym and flags are written as bit-fields, thus we need
4275 a specific processing for endianness. */
4276 v = bfd_h_get_32 (abfd, raw);
4277 if (bfd_big_endian (abfd))
4278 {
4279 ref->isym = (v >> 8) & 0xffffff;
4280 ref->flags = v & 0xff;
4281 }
4282 else
4283 {
4284 ref->isym = v & 0xffffff;
4285 ref->flags = (v >> 24) & 0xff;
4286 }
4287 }
4288 }
4289
4290 if (mdata->dysymtab)
4291 return FALSE;
4292 mdata->dysymtab = cmd;
4293
4294 return TRUE;
4295 }
4296
4297 static bfd_boolean
4298 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4299 {
4300 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4301 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4302 struct mach_o_symtab_command_external raw;
4303
4304 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4305
4306 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4307 return FALSE;
4308
4309 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4310 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4311 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4312 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4313 symtab->symbols = NULL;
4314 symtab->strtab = NULL;
4315
4316 if (symtab->nsyms != 0)
4317 abfd->flags |= HAS_SYMS;
4318
4319 if (mdata->symtab)
4320 return FALSE;
4321 mdata->symtab = symtab;
4322 return TRUE;
4323 }
4324
4325 static bfd_boolean
4326 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4327 {
4328 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4329
4330 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4331
4332 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4333 return FALSE;
4334
4335 return TRUE;
4336 }
4337
4338 static bfd_boolean
4339 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4340 {
4341 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4342 struct mach_o_linkedit_data_command_external raw;
4343
4344 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4345 return FALSE;
4346
4347 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4348 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4349 return TRUE;
4350 }
4351
4352 static bfd_boolean
4353 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4354 {
4355 bfd_mach_o_str_command *cmd = &command->command.str;
4356 struct mach_o_str_command_external raw;
4357 unsigned long off;
4358
4359 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4360 return FALSE;
4361
4362 off = bfd_get_32 (abfd, raw.str);
4363 cmd->stroff = command->offset + off;
4364 cmd->str_len = command->len - off;
4365 cmd->str = bfd_alloc (abfd, cmd->str_len);
4366 if (cmd->str == NULL)
4367 return FALSE;
4368 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4369 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4370 return FALSE;
4371 return TRUE;
4372 }
4373
4374 static unsigned char *
4375 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4376 {
4377 unsigned char *buf;
4378
4379 buf = bfd_alloc (abfd, size);
4380 if (buf == NULL)
4381 return NULL;
4382 if (bfd_seek (abfd, off, SEEK_SET) != 0
4383 || bfd_bread (buf, size, abfd) != size)
4384 return NULL;
4385 return buf;
4386 }
4387
4388 static bfd_boolean
4389 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4390 {
4391 /* Read rebase content. */
4392 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4393 {
4394 cmd->rebase_content =
4395 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4396 if (cmd->rebase_content == NULL)
4397 return FALSE;
4398 }
4399
4400 /* Read bind content. */
4401 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4402 {
4403 cmd->bind_content =
4404 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4405 if (cmd->bind_content == NULL)
4406 return FALSE;
4407 }
4408
4409 /* Read weak bind content. */
4410 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4411 {
4412 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4413 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4414 if (cmd->weak_bind_content == NULL)
4415 return FALSE;
4416 }
4417
4418 /* Read lazy bind content. */
4419 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4420 {
4421 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4422 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4423 if (cmd->lazy_bind_content == NULL)
4424 return FALSE;
4425 }
4426
4427 /* Read export content. */
4428 if (cmd->export_content == NULL && cmd->export_size != 0)
4429 {
4430 cmd->export_content = bfd_mach_o_alloc_and_read
4431 (abfd, cmd->export_off, cmd->export_size);
4432 if (cmd->export_content == NULL)
4433 return FALSE;
4434 }
4435
4436 return TRUE;
4437 }
4438
4439 static bfd_boolean
4440 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4441 {
4442 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4443 struct mach_o_dyld_info_command_external raw;
4444
4445 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4446 return FALSE;
4447
4448 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4449 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4450 cmd->rebase_content = NULL;
4451 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4452 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4453 cmd->bind_content = NULL;
4454 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4455 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4456 cmd->weak_bind_content = NULL;
4457 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4458 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4459 cmd->lazy_bind_content = NULL;
4460 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4461 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4462 cmd->export_content = NULL;
4463 return TRUE;
4464 }
4465
4466 static bfd_boolean
4467 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4468 {
4469 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4470 struct mach_o_version_min_command_external raw;
4471 unsigned int ver;
4472
4473 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4474 return FALSE;
4475
4476 ver = bfd_get_32 (abfd, raw.version);
4477 cmd->rel = ver >> 16;
4478 cmd->maj = ver >> 8;
4479 cmd->min = ver;
4480 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4481 return TRUE;
4482 }
4483
4484 static bfd_boolean
4485 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4486 {
4487 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4488 struct mach_o_encryption_info_command_external raw;
4489
4490 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4491 return FALSE;
4492
4493 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4494 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4495 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4496 return TRUE;
4497 }
4498
4499 static bfd_boolean
4500 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4501 {
4502 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4503 struct mach_o_encryption_info_64_command_external raw;
4504
4505 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4506 return FALSE;
4507
4508 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4509 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4510 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4511 return TRUE;
4512 }
4513
4514 static bfd_boolean
4515 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4516 {
4517 bfd_mach_o_main_command *cmd = &command->command.main;
4518 struct mach_o_entry_point_command_external raw;
4519
4520 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4521 return FALSE;
4522
4523 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4524 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4525 return TRUE;
4526 }
4527
4528 static bfd_boolean
4529 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4530 {
4531 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4532 struct mach_o_source_version_command_external raw;
4533 bfd_uint64_t ver;
4534
4535 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4536 return FALSE;
4537
4538 ver = bfd_get_64 (abfd, raw.version);
4539 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4540 generates warnings) in case of the host doesn't support 64 bit
4541 integers. */
4542 cmd->e = ver & 0x3ff;
4543 ver >>= 10;
4544 cmd->d = ver & 0x3ff;
4545 ver >>= 10;
4546 cmd->c = ver & 0x3ff;
4547 ver >>= 10;
4548 cmd->b = ver & 0x3ff;
4549 ver >>= 10;
4550 cmd->a = ver & 0xffffff;
4551 return TRUE;
4552 }
4553
4554 static bfd_boolean
4555 bfd_mach_o_read_segment (bfd *abfd,
4556 bfd_mach_o_load_command *command,
4557 unsigned int wide)
4558 {
4559 bfd_mach_o_segment_command *seg = &command->command.segment;
4560 unsigned long i;
4561
4562 if (wide)
4563 {
4564 struct mach_o_segment_command_64_external raw;
4565
4566 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4567
4568 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4569 return FALSE;
4570
4571 memcpy (seg->segname, raw.segname, 16);
4572 seg->segname[16] = '\0';
4573
4574 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4575 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4576 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4577 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4578 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4579 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4580 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4581 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4582 }
4583 else
4584 {
4585 struct mach_o_segment_command_32_external raw;
4586
4587 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4588
4589 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4590 return FALSE;
4591
4592 memcpy (seg->segname, raw.segname, 16);
4593 seg->segname[16] = '\0';
4594
4595 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4596 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4597 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4598 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4599 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4600 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4601 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4602 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4603 }
4604 seg->sect_head = NULL;
4605 seg->sect_tail = NULL;
4606
4607 for (i = 0; i < seg->nsects; i++)
4608 {
4609 asection *sec;
4610
4611 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4612 if (sec == NULL)
4613 return FALSE;
4614
4615 bfd_mach_o_append_section_to_segment
4616 (seg, bfd_mach_o_get_mach_o_section (sec));
4617 }
4618
4619 return TRUE;
4620 }
4621
4622 static bfd_boolean
4623 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4624 {
4625 return bfd_mach_o_read_segment (abfd, command, 0);
4626 }
4627
4628 static bfd_boolean
4629 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4630 {
4631 return bfd_mach_o_read_segment (abfd, command, 1);
4632 }
4633
4634 static bfd_boolean
4635 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4636 {
4637 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4638 struct mach_o_load_command_external raw;
4639 unsigned int cmd;
4640
4641 /* Read command type and length. */
4642 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4643 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4644 return FALSE;
4645
4646 cmd = bfd_h_get_32 (abfd, raw.cmd);
4647 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4648 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4649 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4650
4651 switch (command->type)
4652 {
4653 case BFD_MACH_O_LC_SEGMENT:
4654 if (!bfd_mach_o_read_segment_32 (abfd, command))
4655 return FALSE;
4656 break;
4657 case BFD_MACH_O_LC_SEGMENT_64:
4658 if (!bfd_mach_o_read_segment_64 (abfd, command))
4659 return FALSE;
4660 break;
4661 case BFD_MACH_O_LC_SYMTAB:
4662 if (!bfd_mach_o_read_symtab (abfd, command))
4663 return FALSE;
4664 break;
4665 case BFD_MACH_O_LC_SYMSEG:
4666 break;
4667 case BFD_MACH_O_LC_THREAD:
4668 case BFD_MACH_O_LC_UNIXTHREAD:
4669 if (!bfd_mach_o_read_thread (abfd, command))
4670 return FALSE;
4671 break;
4672 case BFD_MACH_O_LC_LOAD_DYLINKER:
4673 case BFD_MACH_O_LC_ID_DYLINKER:
4674 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4675 if (!bfd_mach_o_read_dylinker (abfd, command))
4676 return FALSE;
4677 break;
4678 case BFD_MACH_O_LC_LOAD_DYLIB:
4679 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4680 case BFD_MACH_O_LC_ID_DYLIB:
4681 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4682 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4683 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4684 if (!bfd_mach_o_read_dylib (abfd, command))
4685 return FALSE;
4686 break;
4687 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4688 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4689 return FALSE;
4690 break;
4691 case BFD_MACH_O_LC_LOADFVMLIB:
4692 case BFD_MACH_O_LC_IDFVMLIB:
4693 if (!bfd_mach_o_read_fvmlib (abfd, command))
4694 return FALSE;
4695 break;
4696 case BFD_MACH_O_LC_IDENT:
4697 case BFD_MACH_O_LC_FVMFILE:
4698 case BFD_MACH_O_LC_PREPAGE:
4699 case BFD_MACH_O_LC_ROUTINES:
4700 case BFD_MACH_O_LC_ROUTINES_64:
4701 break;
4702 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4703 case BFD_MACH_O_LC_SUB_UMBRELLA:
4704 case BFD_MACH_O_LC_SUB_LIBRARY:
4705 case BFD_MACH_O_LC_SUB_CLIENT:
4706 case BFD_MACH_O_LC_RPATH:
4707 if (!bfd_mach_o_read_str (abfd, command))
4708 return FALSE;
4709 break;
4710 case BFD_MACH_O_LC_DYSYMTAB:
4711 if (!bfd_mach_o_read_dysymtab (abfd, command))
4712 return FALSE;
4713 break;
4714 case BFD_MACH_O_LC_PREBIND_CKSUM:
4715 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4716 return FALSE;
4717 break;
4718 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4719 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4720 return FALSE;
4721 break;
4722 case BFD_MACH_O_LC_UUID:
4723 if (!bfd_mach_o_read_uuid (abfd, command))
4724 return FALSE;
4725 break;
4726 case BFD_MACH_O_LC_CODE_SIGNATURE:
4727 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4728 case BFD_MACH_O_LC_FUNCTION_STARTS:
4729 case BFD_MACH_O_LC_DATA_IN_CODE:
4730 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4731 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4732 if (!bfd_mach_o_read_linkedit (abfd, command))
4733 return FALSE;
4734 break;
4735 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4736 if (!bfd_mach_o_read_encryption_info (abfd, command))
4737 return FALSE;
4738 break;
4739 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4740 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4741 return FALSE;
4742 break;
4743 case BFD_MACH_O_LC_DYLD_INFO:
4744 if (!bfd_mach_o_read_dyld_info (abfd, command))
4745 return FALSE;
4746 break;
4747 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4748 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4749 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4750 if (!bfd_mach_o_read_version_min (abfd, command))
4751 return FALSE;
4752 break;
4753 case BFD_MACH_O_LC_MAIN:
4754 if (!bfd_mach_o_read_main (abfd, command))
4755 return FALSE;
4756 break;
4757 case BFD_MACH_O_LC_SOURCE_VERSION:
4758 if (!bfd_mach_o_read_source_version (abfd, command))
4759 return FALSE;
4760 break;
4761 default:
4762 command->len = 0;
4763 _bfd_error_handler (_("%pB: unknown load command %#x"),
4764 abfd, command->type);
4765 return FALSE;
4766 }
4767
4768 return TRUE;
4769 }
4770
4771 static void
4772 bfd_mach_o_flatten_sections (bfd *abfd)
4773 {
4774 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4775 bfd_mach_o_load_command *cmd;
4776 long csect = 0;
4777
4778 /* Count total number of sections. */
4779 mdata->nsects = 0;
4780
4781 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4782 {
4783 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4784 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4785 {
4786 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4787
4788 mdata->nsects += seg->nsects;
4789 }
4790 }
4791
4792 /* Allocate sections array. */
4793 mdata->sections = bfd_alloc2 (abfd,
4794 mdata->nsects, sizeof (bfd_mach_o_section *));
4795
4796 /* Fill the array. */
4797 csect = 0;
4798
4799 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4800 {
4801 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4802 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4803 {
4804 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4805 bfd_mach_o_section *sec;
4806
4807 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4808
4809 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4810 mdata->sections[csect++] = sec;
4811 }
4812 }
4813 }
4814
4815 static bfd_boolean
4816 bfd_mach_o_scan_start_address (bfd *abfd)
4817 {
4818 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4819 bfd_mach_o_thread_command *thr = NULL;
4820 bfd_mach_o_load_command *cmd;
4821 unsigned long i;
4822
4823 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4824 if (cmd->type == BFD_MACH_O_LC_THREAD
4825 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4826 {
4827 thr = &cmd->command.thread;
4828 break;
4829 }
4830 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4831 {
4832 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4833 bfd_mach_o_section *text_sect = mdata->sections[0];
4834
4835 if (text_sect)
4836 {
4837 abfd->start_address = main_cmd->entryoff
4838 + (text_sect->addr - text_sect->offset);
4839 return TRUE;
4840 }
4841 }
4842
4843 /* An object file has no start address, so do not fail if not found. */
4844 if (thr == NULL)
4845 return TRUE;
4846
4847 /* FIXME: create a subtarget hook ? */
4848 for (i = 0; i < thr->nflavours; i++)
4849 {
4850 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4851 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4852 {
4853 unsigned char buf[4];
4854
4855 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4856 || bfd_bread (buf, 4, abfd) != 4)
4857 return FALSE;
4858
4859 abfd->start_address = bfd_h_get_32 (abfd, buf);
4860 }
4861 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4862 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4863 {
4864 unsigned char buf[4];
4865
4866 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4867 || bfd_bread (buf, 4, abfd) != 4)
4868 return FALSE;
4869
4870 abfd->start_address = bfd_h_get_32 (abfd, buf);
4871 }
4872 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4873 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4874 {
4875 unsigned char buf[8];
4876
4877 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4878 || bfd_bread (buf, 8, abfd) != 8)
4879 return FALSE;
4880
4881 abfd->start_address = bfd_h_get_64 (abfd, buf);
4882 }
4883 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4884 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4885 {
4886 unsigned char buf[8];
4887
4888 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4889 || bfd_bread (buf, 8, abfd) != 8)
4890 return FALSE;
4891
4892 abfd->start_address = bfd_h_get_64 (abfd, buf);
4893 }
4894 }
4895
4896 return TRUE;
4897 }
4898
4899 bfd_boolean
4900 bfd_mach_o_set_arch_mach (bfd *abfd,
4901 enum bfd_architecture arch,
4902 unsigned long machine)
4903 {
4904 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4905
4906 /* If this isn't the right architecture for this backend, and this
4907 isn't the generic backend, fail. */
4908 if (arch != bed->arch
4909 && arch != bfd_arch_unknown
4910 && bed->arch != bfd_arch_unknown)
4911 return FALSE;
4912
4913 return bfd_default_set_arch_mach (abfd, arch, machine);
4914 }
4915
4916 static bfd_boolean
4917 bfd_mach_o_scan (bfd *abfd,
4918 bfd_mach_o_header *header,
4919 bfd_mach_o_data_struct *mdata)
4920 {
4921 unsigned int i;
4922 enum bfd_architecture cputype;
4923 unsigned long cpusubtype;
4924 unsigned int hdrsize;
4925
4926 hdrsize = mach_o_wide_p (header) ?
4927 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4928
4929 mdata->header = *header;
4930
4931 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4932 switch (header->filetype)
4933 {
4934 case BFD_MACH_O_MH_OBJECT:
4935 abfd->flags |= HAS_RELOC;
4936 break;
4937 case BFD_MACH_O_MH_EXECUTE:
4938 abfd->flags |= EXEC_P;
4939 break;
4940 case BFD_MACH_O_MH_DYLIB:
4941 case BFD_MACH_O_MH_BUNDLE:
4942 abfd->flags |= DYNAMIC;
4943 break;
4944 }
4945
4946 abfd->tdata.mach_o_data = mdata;
4947
4948 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4949 &cputype, &cpusubtype);
4950 if (cputype == bfd_arch_unknown)
4951 {
4952 _bfd_error_handler
4953 /* xgettext:c-format */
4954 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4955 header->cputype, header->cpusubtype);
4956 return FALSE;
4957 }
4958
4959 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4960
4961 if (header->ncmds != 0)
4962 {
4963 bfd_mach_o_load_command *cmd;
4964
4965 mdata->first_command = NULL;
4966 mdata->last_command = NULL;
4967
4968 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
4969 if (cmd == NULL)
4970 return FALSE;
4971
4972 for (i = 0; i < header->ncmds; i++)
4973 {
4974 bfd_mach_o_load_command *cur = &cmd[i];
4975
4976 bfd_mach_o_append_command (abfd, cur);
4977
4978 if (i == 0)
4979 cur->offset = hdrsize;
4980 else
4981 {
4982 bfd_mach_o_load_command *prev = &cmd[i - 1];
4983 cur->offset = prev->offset + prev->len;
4984 }
4985
4986 if (!bfd_mach_o_read_command (abfd, cur))
4987 return FALSE;
4988 }
4989 }
4990
4991 /* Sections should be flatten before scanning start address. */
4992 bfd_mach_o_flatten_sections (abfd);
4993 if (!bfd_mach_o_scan_start_address (abfd))
4994 return FALSE;
4995
4996 return TRUE;
4997 }
4998
4999 bfd_boolean
5000 bfd_mach_o_mkobject_init (bfd *abfd)
5001 {
5002 bfd_mach_o_data_struct *mdata = NULL;
5003
5004 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5005 if (mdata == NULL)
5006 return FALSE;
5007 abfd->tdata.mach_o_data = mdata;
5008
5009 mdata->header.magic = 0;
5010 mdata->header.cputype = 0;
5011 mdata->header.cpusubtype = 0;
5012 mdata->header.filetype = 0;
5013 mdata->header.ncmds = 0;
5014 mdata->header.sizeofcmds = 0;
5015 mdata->header.flags = 0;
5016 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5017 mdata->first_command = NULL;
5018 mdata->last_command = NULL;
5019 mdata->nsects = 0;
5020 mdata->sections = NULL;
5021 mdata->dyn_reloc_cache = NULL;
5022
5023 return TRUE;
5024 }
5025
5026 static bfd_boolean
5027 bfd_mach_o_gen_mkobject (bfd *abfd)
5028 {
5029 bfd_mach_o_data_struct *mdata;
5030
5031 if (!bfd_mach_o_mkobject_init (abfd))
5032 return FALSE;
5033
5034 mdata = bfd_mach_o_get_data (abfd);
5035 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5036 mdata->header.cputype = 0;
5037 mdata->header.cpusubtype = 0;
5038 mdata->header.byteorder = abfd->xvec->byteorder;
5039 mdata->header.version = 1;
5040
5041 return TRUE;
5042 }
5043
5044 const bfd_target *
5045 bfd_mach_o_header_p (bfd *abfd,
5046 file_ptr hdr_off,
5047 bfd_mach_o_filetype filetype,
5048 bfd_mach_o_cpu_type cputype)
5049 {
5050 bfd_mach_o_header header;
5051 bfd_mach_o_data_struct *mdata;
5052
5053 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5054 goto wrong;
5055
5056 if (! (header.byteorder == BFD_ENDIAN_BIG
5057 || header.byteorder == BFD_ENDIAN_LITTLE))
5058 {
5059 _bfd_error_handler (_("unknown header byte-order value %#x"),
5060 header.byteorder);
5061 goto wrong;
5062 }
5063
5064 if (! ((header.byteorder == BFD_ENDIAN_BIG
5065 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5066 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5067 || (header.byteorder == BFD_ENDIAN_LITTLE
5068 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5069 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5070 goto wrong;
5071
5072 /* Check cputype and filetype.
5073 In case of wildcard, do not accept magics that are handled by existing
5074 targets. */
5075 if (cputype)
5076 {
5077 if (header.cputype != cputype)
5078 goto wrong;
5079 }
5080 else
5081 {
5082 #ifndef BFD64
5083 /* Do not recognize 64 architectures if not configured for 64bit targets.
5084 This could happen only for generic targets. */
5085 if (mach_o_wide_p (&header))
5086 goto wrong;
5087 #endif
5088 }
5089
5090 if (filetype)
5091 {
5092 if (header.filetype != filetype)
5093 goto wrong;
5094 }
5095 else
5096 {
5097 switch (header.filetype)
5098 {
5099 case BFD_MACH_O_MH_CORE:
5100 /* Handled by core_p */
5101 goto wrong;
5102 default:
5103 break;
5104 }
5105 }
5106
5107 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5108 if (mdata == NULL)
5109 goto fail;
5110 mdata->hdr_offset = hdr_off;
5111
5112 if (!bfd_mach_o_scan (abfd, &header, mdata))
5113 goto wrong;
5114
5115 return abfd->xvec;
5116
5117 wrong:
5118 bfd_set_error (bfd_error_wrong_format);
5119
5120 fail:
5121 return NULL;
5122 }
5123
5124 static const bfd_target *
5125 bfd_mach_o_gen_object_p (bfd *abfd)
5126 {
5127 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5128 }
5129
5130 static const bfd_target *
5131 bfd_mach_o_gen_core_p (bfd *abfd)
5132 {
5133 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5134 }
5135
5136 /* Return the base address of ABFD, ie the address at which the image is
5137 mapped. The possible initial pagezero is ignored. */
5138
5139 bfd_vma
5140 bfd_mach_o_get_base_address (bfd *abfd)
5141 {
5142 bfd_mach_o_data_struct *mdata;
5143 bfd_mach_o_load_command *cmd;
5144
5145 /* Check for Mach-O. */
5146 if (!bfd_mach_o_valid (abfd))
5147 return 0;
5148 mdata = bfd_mach_o_get_data (abfd);
5149
5150 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5151 {
5152 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5153 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5154 {
5155 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5156
5157 if (segcmd->initprot != 0)
5158 return segcmd->vmaddr;
5159 }
5160 }
5161 return 0;
5162 }
5163
5164 typedef struct mach_o_fat_archentry
5165 {
5166 unsigned long cputype;
5167 unsigned long cpusubtype;
5168 unsigned long offset;
5169 unsigned long size;
5170 unsigned long align;
5171 } mach_o_fat_archentry;
5172
5173 typedef struct mach_o_fat_data_struct
5174 {
5175 unsigned long magic;
5176 unsigned long nfat_arch;
5177 mach_o_fat_archentry *archentries;
5178 } mach_o_fat_data_struct;
5179
5180 const bfd_target *
5181 bfd_mach_o_fat_archive_p (bfd *abfd)
5182 {
5183 mach_o_fat_data_struct *adata = NULL;
5184 struct mach_o_fat_header_external hdr;
5185 unsigned long i;
5186
5187 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5188 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5189 goto error;
5190
5191 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5192 if (adata == NULL)
5193 goto error;
5194
5195 adata->magic = bfd_getb32 (hdr.magic);
5196 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5197 if (adata->magic != 0xcafebabe)
5198 goto error;
5199 /* Avoid matching Java bytecode files, which have the same magic number.
5200 In the Java bytecode file format this field contains the JVM version,
5201 which starts at 43.0. */
5202 if (adata->nfat_arch > 30)
5203 goto error;
5204
5205 adata->archentries =
5206 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5207 if (adata->archentries == NULL)
5208 goto error;
5209
5210 for (i = 0; i < adata->nfat_arch; i++)
5211 {
5212 struct mach_o_fat_arch_external arch;
5213 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5214 goto error;
5215 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5216 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5217 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5218 adata->archentries[i].size = bfd_getb32 (arch.size);
5219 adata->archentries[i].align = bfd_getb32 (arch.align);
5220 }
5221
5222 abfd->tdata.mach_o_fat_data = adata;
5223
5224 return abfd->xvec;
5225
5226 error:
5227 if (adata != NULL)
5228 bfd_release (abfd, adata);
5229 bfd_set_error (bfd_error_wrong_format);
5230 return NULL;
5231 }
5232
5233 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5234 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5235 Set arelt_data and origin fields too. */
5236
5237 static void
5238 bfd_mach_o_fat_member_init (bfd *abfd,
5239 enum bfd_architecture arch_type,
5240 unsigned long arch_subtype,
5241 mach_o_fat_archentry *entry)
5242 {
5243 struct areltdata *areltdata;
5244 /* Create the member filename. Use ARCH_NAME. */
5245 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5246
5247 if (ap)
5248 {
5249 /* Use the architecture name if known. */
5250 abfd->filename = xstrdup (ap->printable_name);
5251 }
5252 else
5253 {
5254 /* Forge a uniq id. */
5255 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5256 char *name = xmalloc (namelen);
5257 snprintf (name, namelen, "0x%lx-0x%lx",
5258 entry->cputype, entry->cpusubtype);
5259 abfd->filename = name;
5260 }
5261
5262 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5263 areltdata->parsed_size = entry->size;
5264 abfd->arelt_data = areltdata;
5265 abfd->iostream = NULL;
5266 abfd->origin = entry->offset;
5267 }
5268
5269 bfd *
5270 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5271 {
5272 mach_o_fat_data_struct *adata;
5273 mach_o_fat_archentry *entry = NULL;
5274 unsigned long i;
5275 bfd *nbfd;
5276 enum bfd_architecture arch_type;
5277 unsigned long arch_subtype;
5278
5279 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5280 BFD_ASSERT (adata != NULL);
5281
5282 /* Find index of previous entry. */
5283 if (prev == NULL)
5284 {
5285 /* Start at first one. */
5286 i = 0;
5287 }
5288 else
5289 {
5290 /* Find index of PREV. */
5291 for (i = 0; i < adata->nfat_arch; i++)
5292 {
5293 if (adata->archentries[i].offset == prev->origin)
5294 break;
5295 }
5296
5297 if (i == adata->nfat_arch)
5298 {
5299 /* Not found. */
5300 bfd_set_error (bfd_error_bad_value);
5301 return NULL;
5302 }
5303
5304 /* Get next entry. */
5305 i++;
5306 }
5307
5308 if (i >= adata->nfat_arch)
5309 {
5310 bfd_set_error (bfd_error_no_more_archived_files);
5311 return NULL;
5312 }
5313
5314 entry = &adata->archentries[i];
5315 nbfd = _bfd_new_bfd_contained_in (archive);
5316 if (nbfd == NULL)
5317 return NULL;
5318
5319 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5320 &arch_type, &arch_subtype);
5321
5322 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5323
5324 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5325
5326 return nbfd;
5327 }
5328
5329 /* Analogous to stat call. */
5330
5331 static int
5332 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5333 {
5334 if (abfd->arelt_data == NULL)
5335 {
5336 bfd_set_error (bfd_error_invalid_operation);
5337 return -1;
5338 }
5339
5340 buf->st_mtime = 0;
5341 buf->st_uid = 0;
5342 buf->st_gid = 0;
5343 buf->st_mode = 0644;
5344 buf->st_size = arelt_size (abfd);
5345
5346 return 0;
5347 }
5348
5349 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5350 If ABFD is a fat image containing a member that corresponds to FORMAT
5351 and ARCH, returns it.
5352 In other case, returns NULL.
5353 This function allows transparent uses of fat images. */
5354
5355 bfd *
5356 bfd_mach_o_fat_extract (bfd *abfd,
5357 bfd_format format,
5358 const bfd_arch_info_type *arch)
5359 {
5360 bfd *res;
5361 mach_o_fat_data_struct *adata;
5362 unsigned int i;
5363
5364 if (bfd_check_format (abfd, format))
5365 {
5366 if (bfd_get_arch_info (abfd) == arch)
5367 return abfd;
5368 return NULL;
5369 }
5370 if (!bfd_check_format (abfd, bfd_archive)
5371 || abfd->xvec != &mach_o_fat_vec)
5372 return NULL;
5373
5374 /* This is a Mach-O fat image. */
5375 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5376 BFD_ASSERT (adata != NULL);
5377
5378 for (i = 0; i < adata->nfat_arch; i++)
5379 {
5380 struct mach_o_fat_archentry *e = &adata->archentries[i];
5381 enum bfd_architecture cpu_type;
5382 unsigned long cpu_subtype;
5383
5384 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5385 &cpu_type, &cpu_subtype);
5386 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5387 continue;
5388
5389 /* The architecture is found. */
5390 res = _bfd_new_bfd_contained_in (abfd);
5391 if (res == NULL)
5392 return NULL;
5393
5394 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5395
5396 if (bfd_check_format (res, format))
5397 {
5398 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5399 return res;
5400 }
5401 bfd_close (res);
5402 return NULL;
5403 }
5404
5405 return NULL;
5406 }
5407
5408 int
5409 bfd_mach_o_lookup_command (bfd *abfd,
5410 bfd_mach_o_load_command_type type,
5411 bfd_mach_o_load_command **mcommand)
5412 {
5413 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5414 struct bfd_mach_o_load_command *cmd;
5415 unsigned int num;
5416
5417 BFD_ASSERT (mdata != NULL);
5418 BFD_ASSERT (mcommand != NULL);
5419
5420 num = 0;
5421 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5422 {
5423 if (cmd->type != type)
5424 continue;
5425
5426 if (num == 0)
5427 *mcommand = cmd;
5428 num++;
5429 }
5430
5431 return num;
5432 }
5433
5434 unsigned long
5435 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5436 {
5437 switch (type)
5438 {
5439 case BFD_MACH_O_CPU_TYPE_MC680x0:
5440 return 0x04000000;
5441 case BFD_MACH_O_CPU_TYPE_MC88000:
5442 return 0xffffe000;
5443 case BFD_MACH_O_CPU_TYPE_POWERPC:
5444 return 0xc0000000;
5445 case BFD_MACH_O_CPU_TYPE_I386:
5446 return 0xc0000000;
5447 case BFD_MACH_O_CPU_TYPE_SPARC:
5448 return 0xf0000000;
5449 case BFD_MACH_O_CPU_TYPE_I860:
5450 return 0;
5451 case BFD_MACH_O_CPU_TYPE_HPPA:
5452 return 0xc0000000 - 0x04000000;
5453 default:
5454 return 0;
5455 }
5456 }
5457
5458 /* The following two tables should be kept, as far as possible, in order of
5459 most frequently used entries to optimize their use from gas. */
5460
5461 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5462 {
5463 { "regular", BFD_MACH_O_S_REGULAR},
5464 { "coalesced", BFD_MACH_O_S_COALESCED},
5465 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5466 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5467 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5468 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5469 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5470 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5471 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5472 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5473 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5474 { "interposing", BFD_MACH_O_S_INTERPOSING},
5475 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5476 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5477 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5478 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5479 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5480 { NULL, 0}
5481 };
5482
5483 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5484 {
5485 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5486 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5487 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5488 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5489 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5490 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5491 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5492 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5493 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5494 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5495 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5496 { NULL, 0}
5497 };
5498
5499 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5500
5501 unsigned int
5502 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5503 {
5504 const bfd_mach_o_xlat_name *x;
5505 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5506
5507 for (x = bfd_mach_o_section_type_name; x->name; x++)
5508 if (strcmp (x->name, name) == 0)
5509 {
5510 /* We found it... does the target support it? */
5511 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5512 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5513 return x->val; /* OK. */
5514 else
5515 break; /* Not supported. */
5516 }
5517 /* Maximum section ID = 0xff. */
5518 return 256;
5519 }
5520
5521 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5522
5523 unsigned int
5524 bfd_mach_o_get_section_attribute_from_name (const char *name)
5525 {
5526 const bfd_mach_o_xlat_name *x;
5527
5528 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5529 if (strcmp (x->name, name) == 0)
5530 return x->val;
5531 return (unsigned int)-1;
5532 }
5533
5534 int
5535 bfd_mach_o_core_fetch_environment (bfd *abfd,
5536 unsigned char **rbuf,
5537 unsigned int *rlen)
5538 {
5539 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5540 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5541 bfd_mach_o_load_command *cmd;
5542
5543 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5544 {
5545 bfd_mach_o_segment_command *seg;
5546
5547 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5548 continue;
5549
5550 seg = &cmd->command.segment;
5551
5552 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5553 {
5554 unsigned long start = seg->fileoff;
5555 unsigned long end = seg->fileoff + seg->filesize;
5556 unsigned char *buf = bfd_malloc (1024);
5557 unsigned long size = 1024;
5558
5559 for (;;)
5560 {
5561 bfd_size_type nread = 0;
5562 unsigned long offset;
5563 int found_nonnull = 0;
5564
5565 if (size > (end - start))
5566 size = (end - start);
5567
5568 buf = bfd_realloc_or_free (buf, size);
5569 if (buf == NULL)
5570 return -1;
5571
5572 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5573 {
5574 free (buf);
5575 return -1;
5576 }
5577
5578 nread = bfd_bread (buf, size, abfd);
5579
5580 if (nread != size)
5581 {
5582 free (buf);
5583 return -1;
5584 }
5585
5586 for (offset = 4; offset <= size; offset += 4)
5587 {
5588 unsigned long val;
5589
5590 val = *((unsigned long *) (buf + size - offset));
5591 if (! found_nonnull)
5592 {
5593 if (val != 0)
5594 found_nonnull = 1;
5595 }
5596 else if (val == 0x0)
5597 {
5598 unsigned long bottom;
5599 unsigned long top;
5600
5601 bottom = seg->fileoff + seg->filesize - offset;
5602 top = seg->fileoff + seg->filesize - 4;
5603 *rbuf = bfd_malloc (top - bottom);
5604 *rlen = top - bottom;
5605
5606 memcpy (*rbuf, buf + size - *rlen, *rlen);
5607 free (buf);
5608 return 0;
5609 }
5610 }
5611
5612 if (size == (end - start))
5613 break;
5614
5615 size *= 2;
5616 }
5617
5618 free (buf);
5619 }
5620 }
5621
5622 return -1;
5623 }
5624
5625 char *
5626 bfd_mach_o_core_file_failing_command (bfd *abfd)
5627 {
5628 unsigned char *buf = NULL;
5629 unsigned int len = 0;
5630 int ret;
5631
5632 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5633 if (ret < 0)
5634 return NULL;
5635
5636 return (char *) buf;
5637 }
5638
5639 int
5640 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5641 {
5642 return 0;
5643 }
5644
5645 static bfd_mach_o_uuid_command *
5646 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5647 {
5648 bfd_mach_o_load_command *uuid_cmd = NULL;
5649 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5650 if (ncmd != 1 || uuid_cmd == NULL)
5651 return FALSE;
5652 return &uuid_cmd->command.uuid;
5653 }
5654
5655 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5656
5657 static bfd_boolean
5658 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5659 {
5660 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5661
5662 BFD_ASSERT (abfd);
5663 BFD_ASSERT (uuid_cmd);
5664
5665 if (!bfd_check_format (abfd, bfd_object))
5666 return FALSE;
5667
5668 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5669 || bfd_mach_o_get_data (abfd) == NULL
5670 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5671 return FALSE;
5672
5673 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5674 if (dsym_uuid_cmd == NULL)
5675 return FALSE;
5676
5677 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5678 sizeof (uuid_cmd->uuid)) != 0)
5679 return FALSE;
5680
5681 return TRUE;
5682 }
5683
5684 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5685 The caller is responsible for closing the returned BFD object and
5686 its my_archive if the returned BFD is in a fat dSYM. */
5687
5688 static bfd *
5689 bfd_mach_o_find_dsym (const char *dsym_filename,
5690 const bfd_mach_o_uuid_command *uuid_cmd,
5691 const bfd_arch_info_type *arch)
5692 {
5693 bfd *base_dsym_bfd, *dsym_bfd;
5694
5695 BFD_ASSERT (uuid_cmd);
5696
5697 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5698 if (base_dsym_bfd == NULL)
5699 return NULL;
5700
5701 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5702 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5703 return dsym_bfd;
5704
5705 bfd_close (dsym_bfd);
5706 if (base_dsym_bfd != dsym_bfd)
5707 bfd_close (base_dsym_bfd);
5708
5709 return NULL;
5710 }
5711
5712 /* Return a BFD created from a dSYM file for ABFD.
5713 The caller is responsible for closing the returned BFD object, its
5714 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5715
5716 static bfd *
5717 bfd_mach_o_follow_dsym (bfd *abfd)
5718 {
5719 char *dsym_filename;
5720 bfd_mach_o_uuid_command *uuid_cmd;
5721 bfd *dsym_bfd, *base_bfd = abfd;
5722 const char *base_basename;
5723
5724 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5725 return NULL;
5726
5727 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5728 base_bfd = abfd->my_archive;
5729 /* BFD may have been opened from a stream. */
5730 if (base_bfd->filename == NULL)
5731 {
5732 bfd_set_error (bfd_error_invalid_operation);
5733 return NULL;
5734 }
5735 base_basename = lbasename (base_bfd->filename);
5736
5737 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5738 if (uuid_cmd == NULL)
5739 return NULL;
5740
5741 /* TODO: We assume the DWARF file has the same as the binary's.
5742 It seems apple's GDB checks all files in the dSYM bundle directory.
5743 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5744 */
5745 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5746 + strlen (dsym_subdir) + 1
5747 + strlen (base_basename) + 1);
5748 sprintf (dsym_filename, "%s%s/%s",
5749 base_bfd->filename, dsym_subdir, base_basename);
5750
5751 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5752 bfd_get_arch_info (abfd));
5753 if (dsym_bfd == NULL)
5754 free (dsym_filename);
5755
5756 return dsym_bfd;
5757 }
5758
5759 bfd_boolean
5760 bfd_mach_o_find_nearest_line (bfd *abfd,
5761 asymbol **symbols,
5762 asection *section,
5763 bfd_vma offset,
5764 const char **filename_ptr,
5765 const char **functionname_ptr,
5766 unsigned int *line_ptr,
5767 unsigned int *discriminator_ptr)
5768 {
5769 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5770 if (mdata == NULL)
5771 return FALSE;
5772 switch (mdata->header.filetype)
5773 {
5774 case BFD_MACH_O_MH_OBJECT:
5775 break;
5776 case BFD_MACH_O_MH_EXECUTE:
5777 case BFD_MACH_O_MH_DYLIB:
5778 case BFD_MACH_O_MH_BUNDLE:
5779 case BFD_MACH_O_MH_KEXT_BUNDLE:
5780 if (mdata->dwarf2_find_line_info == NULL)
5781 {
5782 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5783 /* When we couldn't find dSYM for this binary, we look for
5784 the debug information in the binary itself. In this way,
5785 we won't try finding separated dSYM again because
5786 mdata->dwarf2_find_line_info will be filled. */
5787 if (! mdata->dsym_bfd)
5788 break;
5789 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5790 dwarf_debug_sections, symbols,
5791 &mdata->dwarf2_find_line_info,
5792 FALSE))
5793 return FALSE;
5794 }
5795 break;
5796 default:
5797 return FALSE;
5798 }
5799 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5800 filename_ptr, functionname_ptr,
5801 line_ptr, discriminator_ptr,
5802 dwarf_debug_sections, 0,
5803 &mdata->dwarf2_find_line_info);
5804 }
5805
5806 bfd_boolean
5807 bfd_mach_o_close_and_cleanup (bfd *abfd)
5808 {
5809 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5810 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5811 {
5812 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5813 bfd_mach_o_free_cached_info (abfd);
5814 if (mdata->dsym_bfd != NULL)
5815 {
5816 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5817 #if 0
5818 /* FIXME: PR 19435: This calculation to find the memory allocated by
5819 bfd_mach_o_follow_dsym for the filename does not always end up
5820 selecting the correct pointer. Unfortunately this problem is
5821 very hard to reproduce on a non Mach-O native system, so until it
5822 can be traced and fixed on such a system, this code will remain
5823 commented out. This does mean that there will be a memory leak,
5824 but it is small, and happens when we are closing down, so it
5825 should not matter too much. */
5826 char *dsym_filename = (char *)(fat_bfd
5827 ? fat_bfd->filename
5828 : mdata->dsym_bfd->filename);
5829 #endif
5830 bfd_close (mdata->dsym_bfd);
5831 mdata->dsym_bfd = NULL;
5832 if (fat_bfd)
5833 bfd_close (fat_bfd);
5834 #if 0
5835 free (dsym_filename);
5836 #endif
5837 }
5838 }
5839
5840 return _bfd_generic_close_and_cleanup (abfd);
5841 }
5842
5843 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5844 {
5845 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5846 asection *asect;
5847 free (mdata->dyn_reloc_cache);
5848 mdata->dyn_reloc_cache = NULL;
5849 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5850 {
5851 free (asect->relocation);
5852 asect->relocation = NULL;
5853 }
5854
5855 return TRUE;
5856 }
5857
5858 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5859 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5860
5861 #define bfd_mach_o_canonicalize_one_reloc NULL
5862 #define bfd_mach_o_swap_reloc_out NULL
5863 #define bfd_mach_o_print_thread NULL
5864 #define bfd_mach_o_tgt_seg_table NULL
5865 #define bfd_mach_o_section_type_valid_for_tgt NULL
5866
5867 #define TARGET_NAME mach_o_be_vec
5868 #define TARGET_STRING "mach-o-be"
5869 #define TARGET_ARCHITECTURE bfd_arch_unknown
5870 #define TARGET_PAGESIZE 1
5871 #define TARGET_BIG_ENDIAN 1
5872 #define TARGET_ARCHIVE 0
5873 #define TARGET_PRIORITY 1
5874 #include "mach-o-target.c"
5875
5876 #undef TARGET_NAME
5877 #undef TARGET_STRING
5878 #undef TARGET_ARCHITECTURE
5879 #undef TARGET_PAGESIZE
5880 #undef TARGET_BIG_ENDIAN
5881 #undef TARGET_ARCHIVE
5882 #undef TARGET_PRIORITY
5883
5884 #define TARGET_NAME mach_o_le_vec
5885 #define TARGET_STRING "mach-o-le"
5886 #define TARGET_ARCHITECTURE bfd_arch_unknown
5887 #define TARGET_PAGESIZE 1
5888 #define TARGET_BIG_ENDIAN 0
5889 #define TARGET_ARCHIVE 0
5890 #define TARGET_PRIORITY 1
5891
5892 #include "mach-o-target.c"
5893
5894 #undef TARGET_NAME
5895 #undef TARGET_STRING
5896 #undef TARGET_ARCHITECTURE
5897 #undef TARGET_PAGESIZE
5898 #undef TARGET_BIG_ENDIAN
5899 #undef TARGET_ARCHIVE
5900 #undef TARGET_PRIORITY
5901
5902 /* Not yet handled: creating an archive. */
5903 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5904
5905 #define bfd_mach_o_close_and_cleanup _bfd_bool_bfd_true
5906
5907 /* Not used. */
5908 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5909 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
5910 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
5911
5912 #define TARGET_NAME mach_o_fat_vec
5913 #define TARGET_STRING "mach-o-fat"
5914 #define TARGET_ARCHITECTURE bfd_arch_unknown
5915 #define TARGET_PAGESIZE 1
5916 #define TARGET_BIG_ENDIAN 1
5917 #define TARGET_ARCHIVE 1
5918 #define TARGET_PRIORITY 0
5919
5920 #include "mach-o-target.c"
5921
5922 #undef TARGET_NAME
5923 #undef TARGET_STRING
5924 #undef TARGET_ARCHITECTURE
5925 #undef TARGET_PAGESIZE
5926 #undef TARGET_BIG_ENDIAN
5927 #undef TARGET_ARCHIVE
5928 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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