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Fix compile time warning about using a possibly uninitialised variable.
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2017 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))
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) != TRUE)
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 0x%lx"),
2532 (unsigned long) 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 0x%lx"),
2637 (unsigned long) 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 (%lx) below start of segment (%lx)"),
2821 (unsigned long) s->addr, (unsigned long) vma);
2822 return FALSE;
2823 }
2824
2825 vma = s->addr + s->size;
2826 }
2827
2828 /* Set segment file offset: make it page aligned. */
2829 vma = seg->sect_head->addr;
2830 seg->vmaddr = vma & ~pagemask;
2831 if ((mdata->filelen & pagemask) > (vma & pagemask))
2832 mdata->filelen += pagemask + 1;
2833 seg->fileoff = mdata->filelen & ~pagemask;
2834 mdata->filelen = seg->fileoff + (vma & pagemask);
2835
2836 /* Set section file offset. */
2837 for (s = seg->sect_head; s != NULL; s = s->next)
2838 {
2839 asection *sec = s->bfdsection;
2840 flagword flags = bfd_get_section_flags (abfd, sec);
2841
2842 /* Adjust segment size. */
2843 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2844 seg->vmsize += s->size;
2845
2846 /* File offset and length. */
2847 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2848
2849 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2850 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2851 != BFD_MACH_O_S_GB_ZEROFILL))
2852 {
2853 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2854
2855 s->offset = mdata->filelen;
2856 s->bfdsection->filepos = s->offset;
2857
2858 seg->filesize += s->size;
2859 mdata->filelen += s->size;
2860 }
2861 else
2862 {
2863 s->offset = 0;
2864 s->bfdsection->filepos = 0;
2865 }
2866
2867 /* Set protection. */
2868 if (flags & SEC_LOAD)
2869 {
2870 if (flags & SEC_CODE)
2871 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2872 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2873 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2874 }
2875
2876 /* Relocs shouldn't appear in non-object files. */
2877 if (s->bfdsection->reloc_count != 0)
2878 return FALSE;
2879 }
2880
2881 /* Set maxprot. */
2882 if (seg->initprot != 0)
2883 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2884 | BFD_MACH_O_PROT_EXECUTE;
2885 else
2886 seg->maxprot = 0;
2887
2888 /* Round segment size (and file size). */
2889 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2890 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2891 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2892
2893 return TRUE;
2894 }
2895
2896 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2897 fields in header. */
2898
2899 static bfd_boolean
2900 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2901 {
2902 unsigned wide = mach_o_wide_p (&mdata->header);
2903 unsigned int hdrlen;
2904 ufile_ptr offset;
2905 bfd_mach_o_load_command *cmd;
2906 unsigned int align;
2907 bfd_boolean ret = TRUE;
2908
2909 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2910 align = wide ? 8 - 1 : 4 - 1;
2911 offset = hdrlen;
2912 mdata->header.ncmds = 0;
2913
2914 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2915 {
2916 mdata->header.ncmds++;
2917 cmd->offset = offset;
2918
2919 switch (cmd->type)
2920 {
2921 case BFD_MACH_O_LC_SEGMENT_64:
2922 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2923 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2924 break;
2925 case BFD_MACH_O_LC_SEGMENT:
2926 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2927 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2928 break;
2929 case BFD_MACH_O_LC_SYMTAB:
2930 cmd->len = sizeof (struct mach_o_symtab_command_external)
2931 + BFD_MACH_O_LC_SIZE;
2932 break;
2933 case BFD_MACH_O_LC_DYSYMTAB:
2934 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2935 + BFD_MACH_O_LC_SIZE;
2936 break;
2937 case BFD_MACH_O_LC_LOAD_DYLIB:
2938 cmd->len = sizeof (struct mach_o_dylib_command_external)
2939 + BFD_MACH_O_LC_SIZE;
2940 cmd->command.dylib.name_offset = cmd->len;
2941 cmd->len += strlen (cmd->command.dylib.name_str);
2942 cmd->len = (cmd->len + align) & ~align;
2943 break;
2944 case BFD_MACH_O_LC_LOAD_DYLINKER:
2945 cmd->len = sizeof (struct mach_o_str_command_external)
2946 + BFD_MACH_O_LC_SIZE;
2947 cmd->command.dylinker.name_offset = cmd->len;
2948 cmd->len += strlen (cmd->command.dylinker.name_str);
2949 cmd->len = (cmd->len + align) & ~align;
2950 break;
2951 case BFD_MACH_O_LC_MAIN:
2952 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2953 + BFD_MACH_O_LC_SIZE;
2954 break;
2955 case BFD_MACH_O_LC_DYLD_INFO:
2956 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2957 + BFD_MACH_O_LC_SIZE;
2958 break;
2959 default:
2960 _bfd_error_handler
2961 (_("unable to layout unknown load command 0x%lx"),
2962 (unsigned long) cmd->type);
2963 ret = FALSE;
2964 break;
2965 }
2966
2967 BFD_ASSERT (cmd->len % (align + 1) == 0);
2968 offset += cmd->len;
2969 }
2970 mdata->header.sizeofcmds = offset - hdrlen;
2971 mdata->filelen = offset;
2972
2973 return ret;
2974 }
2975
2976 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2977 segment. */
2978
2979 static void
2980 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2981 bfd_mach_o_load_command *cmd,
2982 const char *segname, unsigned int nbr_sect)
2983 {
2984 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2985 unsigned wide = mach_o_wide_p (&mdata->header);
2986
2987 /* Init segment command. */
2988 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2989 cmd->type_required = FALSE;
2990
2991 strcpy (seg->segname, segname);
2992 seg->nsects = nbr_sect;
2993
2994 seg->vmaddr = 0;
2995 seg->vmsize = 0;
2996
2997 seg->fileoff = 0;
2998 seg->filesize = 0;
2999 seg->maxprot = 0;
3000 seg->initprot = 0;
3001 seg->flags = 0;
3002 seg->sect_head = NULL;
3003 seg->sect_tail = NULL;
3004 }
3005
3006 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3007 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3008 and copy functionality. */
3009
3010 bfd_boolean
3011 bfd_mach_o_build_commands (bfd *abfd)
3012 {
3013 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3014 unsigned wide = mach_o_wide_p (&mdata->header);
3015 unsigned int nbr_segcmd = 0;
3016 bfd_mach_o_load_command *commands;
3017 unsigned int nbr_commands;
3018 int symtab_idx = -1;
3019 int dysymtab_idx = -1;
3020 int main_idx = -1;
3021 unsigned int i;
3022
3023 /* Return now if already built. */
3024 if (mdata->header.ncmds != 0)
3025 return TRUE;
3026
3027 /* Fill in the file type, if not already set. */
3028 if (mdata->header.filetype == 0)
3029 {
3030 if (abfd->flags & EXEC_P)
3031 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3032 else if (abfd->flags & DYNAMIC)
3033 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3034 else
3035 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3036 }
3037
3038 /* If hasn't already been done, flatten sections list, and sort
3039 if/when required. Must be done before the symbol table is adjusted,
3040 since that depends on properly numbered sections. */
3041 if (mdata->nsects == 0 || mdata->sections == NULL)
3042 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3043 return FALSE;
3044
3045 /* Order the symbol table, fill-in/check mach-o specific fields and
3046 partition out any indirect symbols. */
3047 if (!bfd_mach_o_mangle_symbols (abfd))
3048 return FALSE;
3049
3050 /* Segment commands. */
3051 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3052 {
3053 /* Only one segment for all the sections. But the segment is
3054 optional if there is no sections. */
3055 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3056 }
3057 else
3058 {
3059 bfd_mach_o_section *prev_sect = NULL;
3060
3061 /* One pagezero segment and one linkedit segment. */
3062 nbr_segcmd = 2;
3063
3064 /* Create one segment for associated segment name in sections.
3065 Assume that sections with the same segment name are consecutive. */
3066 for (i = 0; i < mdata->nsects; i++)
3067 {
3068 bfd_mach_o_section *this_sect = mdata->sections[i];
3069
3070 if (prev_sect == NULL
3071 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3072 {
3073 nbr_segcmd++;
3074 prev_sect = this_sect;
3075 }
3076 }
3077 }
3078
3079 nbr_commands = nbr_segcmd;
3080
3081 /* One command for the symbol table (only if there are symbols. */
3082 if (bfd_get_symcount (abfd) > 0)
3083 symtab_idx = nbr_commands++;
3084
3085 /* FIXME:
3086 This is a rather crude test for whether we should build a dysymtab. */
3087 if (bfd_mach_o_should_emit_dysymtab ()
3088 && bfd_get_symcount (abfd))
3089 {
3090 /* If there should be a case where a dysymtab could be emitted without
3091 a symtab (seems improbable), this would need amending. */
3092 dysymtab_idx = nbr_commands++;
3093 }
3094
3095 /* Add an entry point command. */
3096 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3097 && bfd_get_start_address (abfd) != 0)
3098 main_idx = nbr_commands++;
3099
3100 /* Well, we must have a header, at least. */
3101 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3102
3103 /* A bit unusual, but no content is valid;
3104 as -n empty.s -o empty.o */
3105 if (nbr_commands == 0)
3106 {
3107 /* Layout commands (well none...) and set headers command fields. */
3108 return bfd_mach_o_layout_commands (mdata);
3109 }
3110
3111 /* Create commands for segments (and symtabs), prepend them. */
3112 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3113 if (commands == NULL)
3114 return FALSE;
3115 for (i = 0; i < nbr_commands - 1; i++)
3116 commands[i].next = &commands[i + 1];
3117 commands[nbr_commands - 1].next = mdata->first_command;
3118 if (mdata->first_command == NULL)
3119 mdata->last_command = &commands[nbr_commands - 1];
3120 mdata->first_command = &commands[0];
3121
3122 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3123 {
3124 /* For object file, there is only one segment. */
3125 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3126 }
3127 else if (nbr_segcmd != 0)
3128 {
3129 bfd_mach_o_load_command *cmd;
3130
3131 BFD_ASSERT (nbr_segcmd >= 2);
3132
3133 /* The pagezero. */
3134 cmd = &commands[0];
3135 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3136
3137 /* Segments from sections. */
3138 cmd++;
3139 for (i = 0; i < mdata->nsects;)
3140 {
3141 const char *segname = mdata->sections[i]->segname;
3142 unsigned int nbr_sect = 1;
3143
3144 /* Count number of sections for this segment. */
3145 for (i++; i < mdata->nsects; i++)
3146 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3147 nbr_sect++;
3148 else
3149 break;
3150
3151 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3152 cmd++;
3153 }
3154
3155 /* The linkedit. */
3156 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3157 }
3158
3159 if (symtab_idx >= 0)
3160 {
3161 /* Init symtab command. */
3162 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3163
3164 cmd->type = BFD_MACH_O_LC_SYMTAB;
3165 cmd->type_required = FALSE;
3166 }
3167
3168 /* If required, setup symtab command, see comment above about the quality
3169 of this test. */
3170 if (dysymtab_idx >= 0)
3171 {
3172 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3173
3174 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3175 cmd->type_required = FALSE;
3176 }
3177
3178 /* Create the main command. */
3179 if (main_idx >= 0)
3180 {
3181 bfd_mach_o_load_command *cmd = &commands[main_idx];
3182
3183 cmd->type = BFD_MACH_O_LC_MAIN;
3184 cmd->type_required = TRUE;
3185
3186 cmd->command.main.entryoff = 0;
3187 cmd->command.main.stacksize = 0;
3188 }
3189
3190 /* Layout commands. */
3191 if (! bfd_mach_o_layout_commands (mdata))
3192 return FALSE;
3193
3194 /* So, now we have sized the commands and the filelen set to that.
3195 Now we can build the segment command and set the section file offsets. */
3196 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3197 {
3198 for (i = 0; i < nbr_segcmd; i++)
3199 if (!bfd_mach_o_build_obj_seg_command
3200 (abfd, &commands[i].command.segment))
3201 return FALSE;
3202 }
3203 else
3204 {
3205 bfd_vma maxvma = 0;
3206
3207 /* Skip pagezero and linkedit segments. */
3208 for (i = 1; i < nbr_segcmd - 1; i++)
3209 {
3210 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3211
3212 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3213 return FALSE;
3214
3215 if (seg->vmaddr + seg->vmsize > maxvma)
3216 maxvma = seg->vmaddr + seg->vmsize;
3217 }
3218
3219 /* Set the size of __PAGEZERO. */
3220 commands[0].command.segment.vmsize =
3221 commands[1].command.segment.vmaddr;
3222
3223 /* Set the vma and fileoff of __LINKEDIT. */
3224 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3225 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3226
3227 /* Set entry point (once segments have been laid out). */
3228 if (main_idx >= 0)
3229 commands[main_idx].command.main.entryoff =
3230 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3231 }
3232
3233 return TRUE;
3234 }
3235
3236 /* Set the contents of a section. */
3237
3238 bfd_boolean
3239 bfd_mach_o_set_section_contents (bfd *abfd,
3240 asection *section,
3241 const void * location,
3242 file_ptr offset,
3243 bfd_size_type count)
3244 {
3245 file_ptr pos;
3246
3247 /* Trying to write the first section contents will trigger the creation of
3248 the load commands if they are not already present. */
3249 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3250 return FALSE;
3251
3252 if (count == 0)
3253 return TRUE;
3254
3255 pos = section->filepos + offset;
3256 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3257 || bfd_bwrite (location, count, abfd) != count)
3258 return FALSE;
3259
3260 return TRUE;
3261 }
3262
3263 int
3264 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3265 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3266 {
3267 return 0;
3268 }
3269
3270 /* Make an empty symbol. This is required only because
3271 bfd_make_section_anyway wants to create a symbol for the section. */
3272
3273 asymbol *
3274 bfd_mach_o_make_empty_symbol (bfd *abfd)
3275 {
3276 asymbol *new_symbol;
3277
3278 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3279 if (new_symbol == NULL)
3280 return new_symbol;
3281 new_symbol->the_bfd = abfd;
3282 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3283 return new_symbol;
3284 }
3285
3286 static bfd_boolean
3287 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3288 {
3289 struct mach_o_header_external raw;
3290 unsigned int size;
3291 bfd_vma (*get32) (const void *) = NULL;
3292
3293 /* Just read the magic number. */
3294 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3295 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3296 return FALSE;
3297
3298 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3299 {
3300 header->byteorder = BFD_ENDIAN_BIG;
3301 header->magic = BFD_MACH_O_MH_MAGIC;
3302 header->version = 1;
3303 get32 = bfd_getb32;
3304 }
3305 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3306 {
3307 header->byteorder = BFD_ENDIAN_LITTLE;
3308 header->magic = BFD_MACH_O_MH_MAGIC;
3309 header->version = 1;
3310 get32 = bfd_getl32;
3311 }
3312 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3313 {
3314 header->byteorder = BFD_ENDIAN_BIG;
3315 header->magic = BFD_MACH_O_MH_MAGIC_64;
3316 header->version = 2;
3317 get32 = bfd_getb32;
3318 }
3319 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3320 {
3321 header->byteorder = BFD_ENDIAN_LITTLE;
3322 header->magic = BFD_MACH_O_MH_MAGIC_64;
3323 header->version = 2;
3324 get32 = bfd_getl32;
3325 }
3326 else
3327 {
3328 header->byteorder = BFD_ENDIAN_UNKNOWN;
3329 return FALSE;
3330 }
3331
3332 /* Once the size of the header is known, read the full header. */
3333 size = mach_o_wide_p (header) ?
3334 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3335
3336 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3337 || bfd_bread (&raw, size, abfd) != size)
3338 return FALSE;
3339
3340 header->cputype = (*get32) (raw.cputype);
3341 header->cpusubtype = (*get32) (raw.cpusubtype);
3342 header->filetype = (*get32) (raw.filetype);
3343 header->ncmds = (*get32) (raw.ncmds);
3344 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3345 header->flags = (*get32) (raw.flags);
3346
3347 if (mach_o_wide_p (header))
3348 header->reserved = (*get32) (raw.reserved);
3349 else
3350 header->reserved = 0;
3351
3352 return TRUE;
3353 }
3354
3355 bfd_boolean
3356 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3357 {
3358 bfd_mach_o_section *s;
3359 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3360
3361 s = bfd_mach_o_get_mach_o_section (sec);
3362 if (s == NULL)
3363 {
3364 flagword bfd_flags;
3365 static const mach_o_section_name_xlat * xlat;
3366
3367 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3368 if (s == NULL)
3369 return FALSE;
3370 sec->used_by_bfd = s;
3371 s->bfdsection = sec;
3372
3373 /* Create the Darwin seg/sect name pair from the bfd name.
3374 If this is a canonical name for which a specific paiting exists
3375 there will also be defined flags, type, attribute and alignment
3376 values. */
3377 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3378 if (xlat != NULL)
3379 {
3380 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3381 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3382 : bfdalign;
3383 (void) bfd_set_section_alignment (abfd, sec, s->align);
3384 bfd_flags = bfd_get_section_flags (abfd, sec);
3385 if (bfd_flags == SEC_NO_FLAGS)
3386 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3387 }
3388 else
3389 /* Create default flags. */
3390 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3391 }
3392
3393 return _bfd_generic_new_section_hook (abfd, sec);
3394 }
3395
3396 static void
3397 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3398 unsigned long prot)
3399 {
3400 flagword flags;
3401 bfd_mach_o_section *section;
3402
3403 flags = bfd_get_section_flags (abfd, sec);
3404 section = bfd_mach_o_get_mach_o_section (sec);
3405
3406 /* TODO: see if we should use the xlat system for doing this by
3407 preference and fall back to this for unknown sections. */
3408
3409 if (flags == SEC_NO_FLAGS)
3410 {
3411 /* Try to guess flags. */
3412 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3413 flags = SEC_DEBUGGING;
3414 else
3415 {
3416 flags = SEC_ALLOC;
3417 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3418 != BFD_MACH_O_S_ZEROFILL)
3419 {
3420 flags |= SEC_LOAD;
3421 if (prot & BFD_MACH_O_PROT_EXECUTE)
3422 flags |= SEC_CODE;
3423 if (prot & BFD_MACH_O_PROT_WRITE)
3424 flags |= SEC_DATA;
3425 else if (prot & BFD_MACH_O_PROT_READ)
3426 flags |= SEC_READONLY;
3427 }
3428 }
3429 }
3430 else
3431 {
3432 if ((flags & SEC_DEBUGGING) == 0)
3433 flags |= SEC_ALLOC;
3434 }
3435
3436 if (section->offset != 0)
3437 flags |= SEC_HAS_CONTENTS;
3438 if (section->nreloc != 0)
3439 flags |= SEC_RELOC;
3440
3441 bfd_set_section_flags (abfd, sec, flags);
3442
3443 sec->vma = section->addr;
3444 sec->lma = section->addr;
3445 sec->size = section->size;
3446 sec->filepos = section->offset;
3447 sec->alignment_power = section->align;
3448 sec->segment_mark = 0;
3449 sec->reloc_count = section->nreloc;
3450 sec->rel_filepos = section->reloff;
3451 }
3452
3453 static asection *
3454 bfd_mach_o_make_bfd_section (bfd *abfd,
3455 const unsigned char *segname,
3456 const unsigned char *sectname)
3457 {
3458 const char *sname;
3459 flagword flags;
3460
3461 bfd_mach_o_convert_section_name_to_bfd
3462 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3463 if (sname == NULL)
3464 return NULL;
3465
3466 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3467 }
3468
3469 static asection *
3470 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3471 {
3472 struct mach_o_section_32_external raw;
3473 asection *sec;
3474 bfd_mach_o_section *section;
3475
3476 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3477 != BFD_MACH_O_SECTION_SIZE)
3478 return NULL;
3479
3480 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3481 if (sec == NULL)
3482 return NULL;
3483
3484 section = bfd_mach_o_get_mach_o_section (sec);
3485 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3486 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3487 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3488 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3489 section->addr = bfd_h_get_32 (abfd, raw.addr);
3490 section->size = bfd_h_get_32 (abfd, raw.size);
3491 section->offset = bfd_h_get_32 (abfd, raw.offset);
3492 section->align = bfd_h_get_32 (abfd, raw.align);
3493 /* PR 17512: file: 0017eb76. */
3494 if (section->align > 64)
3495 {
3496 _bfd_error_handler
3497 (_("bfd_mach_o_read_section_32: overlarge alignment value: 0x%x, "
3498 "using 32 instead"), section->align);
3499 section->align = 32;
3500 }
3501 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3502 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3503 section->flags = bfd_h_get_32 (abfd, raw.flags);
3504 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3505 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3506 section->reserved3 = 0;
3507
3508 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3509
3510 return sec;
3511 }
3512
3513 static asection *
3514 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3515 {
3516 struct mach_o_section_64_external raw;
3517 asection *sec;
3518 bfd_mach_o_section *section;
3519
3520 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3521 != BFD_MACH_O_SECTION_64_SIZE)
3522 return NULL;
3523
3524 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3525 if (sec == NULL)
3526 return NULL;
3527
3528 section = bfd_mach_o_get_mach_o_section (sec);
3529 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3530 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3531 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3532 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3533 section->addr = bfd_h_get_64 (abfd, raw.addr);
3534 section->size = bfd_h_get_64 (abfd, raw.size);
3535 section->offset = bfd_h_get_32 (abfd, raw.offset);
3536 section->align = bfd_h_get_32 (abfd, raw.align);
3537 if (section->align > 64)
3538 {
3539 _bfd_error_handler
3540 (_("bfd_mach_o_read_section_64: overlarge alignment value: 0x%x, "
3541 "using 32 instead"), section->align);
3542 section->align = 32;
3543 }
3544 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3545 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3546 section->flags = bfd_h_get_32 (abfd, raw.flags);
3547 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3548 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3549 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3550
3551 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3552
3553 return sec;
3554 }
3555
3556 static asection *
3557 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3558 {
3559 if (wide)
3560 return bfd_mach_o_read_section_64 (abfd, prot);
3561 else
3562 return bfd_mach_o_read_section_32 (abfd, prot);
3563 }
3564
3565 static bfd_boolean
3566 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3567 bfd_mach_o_symtab_command *sym,
3568 bfd_mach_o_asymbol *s,
3569 unsigned long i)
3570 {
3571 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3572 unsigned int wide = mach_o_wide_p (&mdata->header);
3573 unsigned int symwidth =
3574 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3575 unsigned int symoff = sym->symoff + (i * symwidth);
3576 struct mach_o_nlist_64_external raw;
3577 unsigned char type = -1;
3578 unsigned char section = -1;
3579 short desc = -1;
3580 symvalue value = -1;
3581 unsigned long stroff = -1;
3582 unsigned int symtype = -1;
3583
3584 BFD_ASSERT (sym->strtab != NULL);
3585
3586 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3587 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3588 {
3589 _bfd_error_handler
3590 /* xgettext:c-format */
3591 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
3592 symwidth, (unsigned long) symoff);
3593 return FALSE;
3594 }
3595
3596 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3597 type = bfd_h_get_8 (abfd, raw.n_type);
3598 symtype = type & BFD_MACH_O_N_TYPE;
3599 section = bfd_h_get_8 (abfd, raw.n_sect);
3600 desc = bfd_h_get_16 (abfd, raw.n_desc);
3601 if (wide)
3602 value = bfd_h_get_64 (abfd, raw.n_value);
3603 else
3604 value = bfd_h_get_32 (abfd, raw.n_value);
3605
3606 if (stroff >= sym->strsize)
3607 {
3608 _bfd_error_handler
3609 /* xgettext:c-format */
3610 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
3611 (unsigned long) stroff,
3612 (unsigned long) sym->strsize);
3613 return FALSE;
3614 }
3615
3616 s->symbol.the_bfd = abfd;
3617 s->symbol.name = sym->strtab + stroff;
3618 s->symbol.value = value;
3619 s->symbol.flags = 0x0;
3620 s->symbol.udata.i = i;
3621 s->n_type = type;
3622 s->n_sect = section;
3623 s->n_desc = desc;
3624
3625 if (type & BFD_MACH_O_N_STAB)
3626 {
3627 s->symbol.flags |= BSF_DEBUGGING;
3628 s->symbol.section = bfd_und_section_ptr;
3629 switch (type)
3630 {
3631 case N_FUN:
3632 case N_STSYM:
3633 case N_LCSYM:
3634 case N_BNSYM:
3635 case N_SLINE:
3636 case N_ENSYM:
3637 case N_ECOMM:
3638 case N_ECOML:
3639 case N_GSYM:
3640 if ((section > 0) && (section <= mdata->nsects))
3641 {
3642 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3643 s->symbol.value =
3644 s->symbol.value - mdata->sections[section - 1]->addr;
3645 }
3646 break;
3647 }
3648 }
3649 else
3650 {
3651 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3652 s->symbol.flags |= BSF_GLOBAL;
3653 else
3654 s->symbol.flags |= BSF_LOCAL;
3655
3656 switch (symtype)
3657 {
3658 case BFD_MACH_O_N_UNDF:
3659 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3660 && s->symbol.value != 0)
3661 {
3662 /* A common symbol. */
3663 s->symbol.section = bfd_com_section_ptr;
3664 s->symbol.flags = BSF_NO_FLAGS;
3665 }
3666 else
3667 {
3668 s->symbol.section = bfd_und_section_ptr;
3669 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3670 s->symbol.flags |= BSF_WEAK;
3671 }
3672 break;
3673 case BFD_MACH_O_N_PBUD:
3674 s->symbol.section = bfd_und_section_ptr;
3675 break;
3676 case BFD_MACH_O_N_ABS:
3677 s->symbol.section = bfd_abs_section_ptr;
3678 break;
3679 case BFD_MACH_O_N_SECT:
3680 if ((section > 0) && (section <= mdata->nsects))
3681 {
3682 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3683 s->symbol.value =
3684 s->symbol.value - mdata->sections[section - 1]->addr;
3685 }
3686 else
3687 {
3688 /* Mach-O uses 0 to mean "no section"; not an error. */
3689 if (section != 0)
3690 {
3691 _bfd_error_handler
3692 /* xgettext:c-format */
3693 (_("bfd_mach_o_read_symtab_symbol: "
3694 "symbol \"%s\" specified invalid section %d (max %lu): "
3695 "setting to undefined"),
3696 s->symbol.name, section, mdata->nsects);
3697 }
3698 s->symbol.section = bfd_und_section_ptr;
3699 }
3700 break;
3701 case BFD_MACH_O_N_INDR:
3702 /* FIXME: we don't follow the BFD convention as this indirect symbol
3703 won't be followed by the referenced one. This looks harmless
3704 unless we start using the linker. */
3705 s->symbol.flags |= BSF_INDIRECT;
3706 s->symbol.section = bfd_ind_section_ptr;
3707 s->symbol.value = 0;
3708 break;
3709 default:
3710 _bfd_error_handler
3711 /* xgettext:c-format */
3712 (_("bfd_mach_o_read_symtab_symbol: "
3713 "symbol \"%s\" specified invalid type field 0x%x: "
3714 "setting to undefined"), s->symbol.name, symtype);
3715 s->symbol.section = bfd_und_section_ptr;
3716 break;
3717 }
3718 }
3719
3720 return TRUE;
3721 }
3722
3723 bfd_boolean
3724 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3725 {
3726 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3727 bfd_mach_o_symtab_command *sym = mdata->symtab;
3728
3729 /* Fail if there is no symtab. */
3730 if (sym == NULL)
3731 return FALSE;
3732
3733 /* Success if already loaded. */
3734 if (sym->strtab)
3735 return TRUE;
3736
3737 if (abfd->flags & BFD_IN_MEMORY)
3738 {
3739 struct bfd_in_memory *b;
3740
3741 b = (struct bfd_in_memory *) abfd->iostream;
3742
3743 if ((sym->stroff + sym->strsize) > b->size)
3744 {
3745 bfd_set_error (bfd_error_file_truncated);
3746 return FALSE;
3747 }
3748 sym->strtab = (char *) b->buffer + sym->stroff;
3749 }
3750 else
3751 {
3752 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3753 if (sym->strtab == NULL)
3754 return FALSE;
3755
3756 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3757 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3758 {
3759 /* PR 17512: file: 10888-1609-0.004. */
3760 bfd_release (abfd, sym->strtab);
3761 sym->strtab = NULL;
3762 bfd_set_error (bfd_error_file_truncated);
3763 return FALSE;
3764 }
3765 /* Zero terminate the string table. */
3766 sym->strtab[sym->strsize] = 0;
3767 }
3768
3769 return TRUE;
3770 }
3771
3772 bfd_boolean
3773 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3774 {
3775 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3776 bfd_mach_o_symtab_command *sym = mdata->symtab;
3777 unsigned long i;
3778
3779 if (sym == NULL || sym->symbols)
3780 /* Return now if there are no symbols or if already loaded. */
3781 return TRUE;
3782
3783 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3784 if (sym->symbols == NULL)
3785 {
3786 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3787 "unable to allocate memory for symbols"));
3788 sym->nsyms = 0;
3789 return FALSE;
3790 }
3791
3792 if (!bfd_mach_o_read_symtab_strtab (abfd))
3793 goto fail;
3794
3795 for (i = 0; i < sym->nsyms; i++)
3796 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3797 goto fail;
3798
3799 return TRUE;
3800
3801 fail:
3802 bfd_release (abfd, sym->symbols);
3803 sym->symbols = NULL;
3804 sym->nsyms = 0;
3805 return FALSE;
3806 }
3807
3808 static const char *
3809 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3810 {
3811 switch ((int) flavour)
3812 {
3813 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3814 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3815 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3816 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3817 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3818 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3819 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3820 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3821 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3822 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3823 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3824 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3825 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3826 default: return "UNKNOWN";
3827 }
3828 }
3829
3830 static const char *
3831 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3832 {
3833 switch ((int) flavour)
3834 {
3835 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3836 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3837 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3838 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3839 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3840 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3841 default: return "UNKNOWN";
3842 }
3843 }
3844
3845 static bfd_boolean
3846 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3847 {
3848 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3849 struct mach_o_str_command_external raw;
3850 unsigned int nameoff;
3851 unsigned int namelen;
3852
3853 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3854 return FALSE;
3855
3856 nameoff = bfd_h_get_32 (abfd, raw.str);
3857
3858 cmd->name_offset = nameoff;
3859 namelen = command->len - nameoff;
3860 nameoff += command->offset;
3861 cmd->name_str = bfd_alloc (abfd, namelen);
3862 if (cmd->name_str == NULL)
3863 return FALSE;
3864 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3865 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3866 return FALSE;
3867 return TRUE;
3868 }
3869
3870 static bfd_boolean
3871 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3872 {
3873 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3874 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3875 struct mach_o_dylib_command_external raw;
3876 unsigned int nameoff;
3877 unsigned int namelen;
3878
3879 switch (command->type)
3880 {
3881 case BFD_MACH_O_LC_LOAD_DYLIB:
3882 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3883 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3884 case BFD_MACH_O_LC_ID_DYLIB:
3885 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3886 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3887 break;
3888 default:
3889 BFD_FAIL ();
3890 return FALSE;
3891 }
3892
3893 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3894 return FALSE;
3895
3896 nameoff = bfd_h_get_32 (abfd, raw.name);
3897 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3898 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3899 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3900
3901 cmd->name_offset = command->offset + nameoff;
3902 namelen = command->len - nameoff;
3903 cmd->name_str = bfd_alloc (abfd, namelen);
3904 if (cmd->name_str == NULL)
3905 return FALSE;
3906 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
3907 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3908 return FALSE;
3909 return TRUE;
3910 }
3911
3912 static bfd_boolean
3913 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3914 bfd_mach_o_load_command *command)
3915 {
3916 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3917 struct mach_o_prebound_dylib_command_external raw;
3918 unsigned int nameoff;
3919 unsigned int modoff;
3920 unsigned int str_len;
3921 unsigned char *str;
3922
3923 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3924 return FALSE;
3925
3926 nameoff = bfd_h_get_32 (abfd, raw.name);
3927 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3928 if (nameoff > command->len || modoff > command->len)
3929 return FALSE;
3930
3931 str_len = command->len - sizeof (raw);
3932 str = bfd_alloc (abfd, str_len);
3933 if (str == NULL)
3934 return FALSE;
3935 if (bfd_bread (str, str_len, abfd) != str_len)
3936 return FALSE;
3937
3938 cmd->name_offset = command->offset + nameoff;
3939 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3940 cmd->linked_modules_offset = command->offset + modoff;
3941
3942 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3943 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3944 return TRUE;
3945 }
3946
3947 static bfd_boolean
3948 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3949 bfd_mach_o_load_command *command)
3950 {
3951 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3952 struct mach_o_prebind_cksum_command_external raw;
3953
3954 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3955 return FALSE;
3956
3957 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3958 return TRUE;
3959 }
3960
3961 static bfd_boolean
3962 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3963 bfd_mach_o_load_command *command)
3964 {
3965 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3966 struct mach_o_twolevel_hints_command_external raw;
3967
3968 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3969 return FALSE;
3970
3971 cmd->offset = bfd_get_32 (abfd, raw.offset);
3972 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3973 return TRUE;
3974 }
3975
3976 static bfd_boolean
3977 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3978 {
3979 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3980 struct mach_o_fvmlib_command_external raw;
3981 unsigned int nameoff;
3982 unsigned int namelen;
3983
3984 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3985 return FALSE;
3986
3987 nameoff = bfd_h_get_32 (abfd, raw.name);
3988 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3989 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3990
3991 fvm->name_offset = command->offset + nameoff;
3992 namelen = command->len - nameoff;
3993 fvm->name_str = bfd_alloc (abfd, namelen);
3994 if (fvm->name_str == NULL)
3995 return FALSE;
3996 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3997 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3998 return FALSE;
3999 return TRUE;
4000 }
4001
4002 static bfd_boolean
4003 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4004 {
4005 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4006 bfd_mach_o_thread_command *cmd = &command->command.thread;
4007 unsigned int offset;
4008 unsigned int nflavours;
4009 unsigned int i;
4010
4011 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4012 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4013
4014 /* Count the number of threads. */
4015 offset = 8;
4016 nflavours = 0;
4017 while (offset != command->len)
4018 {
4019 struct mach_o_thread_command_external raw;
4020
4021 if (offset >= command->len)
4022 return FALSE;
4023
4024 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4025 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4026 return FALSE;
4027
4028 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
4029 nflavours++;
4030 }
4031
4032 /* Allocate threads. */
4033 cmd->flavours = bfd_alloc2
4034 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4035 if (cmd->flavours == NULL)
4036 return FALSE;
4037 cmd->nflavours = nflavours;
4038
4039 offset = 8;
4040 nflavours = 0;
4041 while (offset != command->len)
4042 {
4043 struct mach_o_thread_command_external raw;
4044
4045 if (offset >= command->len)
4046 return FALSE;
4047
4048 if (nflavours >= cmd->nflavours)
4049 return FALSE;
4050
4051 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4052 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4053 return FALSE;
4054
4055 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4056 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4057 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4058 offset += cmd->flavours[nflavours].size + sizeof (raw);
4059 nflavours++;
4060 }
4061
4062 for (i = 0; i < nflavours; i++)
4063 {
4064 asection *bfdsec;
4065 unsigned int snamelen;
4066 char *sname;
4067 const char *flavourstr;
4068 const char *prefix = "LC_THREAD";
4069 unsigned int j = 0;
4070
4071 switch (mdata->header.cputype)
4072 {
4073 case BFD_MACH_O_CPU_TYPE_POWERPC:
4074 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4075 flavourstr =
4076 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4077 break;
4078 case BFD_MACH_O_CPU_TYPE_I386:
4079 case BFD_MACH_O_CPU_TYPE_X86_64:
4080 flavourstr =
4081 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4082 break;
4083 default:
4084 flavourstr = "UNKNOWN_ARCHITECTURE";
4085 break;
4086 }
4087
4088 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4089 sname = bfd_alloc (abfd, snamelen);
4090 if (sname == NULL)
4091 return FALSE;
4092
4093 for (;;)
4094 {
4095 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4096 if (bfd_get_section_by_name (abfd, sname) == NULL)
4097 break;
4098 j++;
4099 }
4100
4101 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4102
4103 bfdsec->vma = 0;
4104 bfdsec->lma = 0;
4105 bfdsec->size = cmd->flavours[i].size;
4106 bfdsec->filepos = cmd->flavours[i].offset;
4107 bfdsec->alignment_power = 0x0;
4108
4109 cmd->section = bfdsec;
4110 }
4111
4112 return TRUE;
4113 }
4114
4115 static bfd_boolean
4116 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4117 {
4118 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4119 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4120
4121 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4122
4123 {
4124 struct mach_o_dysymtab_command_external raw;
4125
4126 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4127 return FALSE;
4128
4129 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4130 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4131 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4132 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4133 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4134 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4135 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4136 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4137 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4138 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4139 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4140 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4141 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4142 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4143 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4144 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4145 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4146 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4147 }
4148
4149 if (cmd->nmodtab != 0)
4150 {
4151 unsigned int i;
4152 int wide = bfd_mach_o_wide_p (abfd);
4153 unsigned int module_len = wide ? 56 : 52;
4154
4155 cmd->dylib_module =
4156 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4157 if (cmd->dylib_module == NULL)
4158 return FALSE;
4159
4160 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4161 return FALSE;
4162
4163 for (i = 0; i < cmd->nmodtab; i++)
4164 {
4165 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4166 unsigned long v;
4167 unsigned char buf[56];
4168
4169 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4170 return FALSE;
4171
4172 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4173 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4174 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4175 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4176 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4177 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4178 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4179 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4180 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4181 v = bfd_h_get_32 (abfd, buf +36);
4182 module->iinit = v & 0xffff;
4183 module->iterm = (v >> 16) & 0xffff;
4184 v = bfd_h_get_32 (abfd, buf + 40);
4185 module->ninit = v & 0xffff;
4186 module->nterm = (v >> 16) & 0xffff;
4187 if (wide)
4188 {
4189 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4190 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4191 }
4192 else
4193 {
4194 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4195 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4196 }
4197 }
4198 }
4199
4200 if (cmd->ntoc != 0)
4201 {
4202 unsigned long i;
4203
4204 cmd->dylib_toc = bfd_alloc2
4205 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4206 if (cmd->dylib_toc == NULL)
4207 return FALSE;
4208
4209 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4210 return FALSE;
4211
4212 for (i = 0; i < cmd->ntoc; i++)
4213 {
4214 struct mach_o_dylib_table_of_contents_external raw;
4215 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4216
4217 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4218 return FALSE;
4219
4220 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4221 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4222 }
4223 }
4224
4225 if (cmd->nindirectsyms != 0)
4226 {
4227 unsigned int i;
4228
4229 cmd->indirect_syms = bfd_alloc2
4230 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4231 if (cmd->indirect_syms == NULL)
4232 return FALSE;
4233
4234 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4235 return FALSE;
4236
4237 for (i = 0; i < cmd->nindirectsyms; i++)
4238 {
4239 unsigned char raw[4];
4240 unsigned int *is = &cmd->indirect_syms[i];
4241
4242 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4243 return FALSE;
4244
4245 *is = bfd_h_get_32 (abfd, raw);
4246 }
4247 }
4248
4249 if (cmd->nextrefsyms != 0)
4250 {
4251 unsigned long v;
4252 unsigned int i;
4253
4254 cmd->ext_refs = bfd_alloc2
4255 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4256 if (cmd->ext_refs == NULL)
4257 return FALSE;
4258
4259 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4260 return FALSE;
4261
4262 for (i = 0; i < cmd->nextrefsyms; i++)
4263 {
4264 unsigned char raw[4];
4265 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4266
4267 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4268 return FALSE;
4269
4270 /* Fields isym and flags are written as bit-fields, thus we need
4271 a specific processing for endianness. */
4272 v = bfd_h_get_32 (abfd, raw);
4273 if (bfd_big_endian (abfd))
4274 {
4275 ref->isym = (v >> 8) & 0xffffff;
4276 ref->flags = v & 0xff;
4277 }
4278 else
4279 {
4280 ref->isym = v & 0xffffff;
4281 ref->flags = (v >> 24) & 0xff;
4282 }
4283 }
4284 }
4285
4286 if (mdata->dysymtab)
4287 return FALSE;
4288 mdata->dysymtab = cmd;
4289
4290 return TRUE;
4291 }
4292
4293 static bfd_boolean
4294 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4295 {
4296 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4297 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4298 struct mach_o_symtab_command_external raw;
4299
4300 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4301
4302 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4303 return FALSE;
4304
4305 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4306 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4307 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4308 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4309 symtab->symbols = NULL;
4310 symtab->strtab = NULL;
4311
4312 if (symtab->nsyms != 0)
4313 abfd->flags |= HAS_SYMS;
4314
4315 if (mdata->symtab)
4316 return FALSE;
4317 mdata->symtab = symtab;
4318 return TRUE;
4319 }
4320
4321 static bfd_boolean
4322 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4323 {
4324 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4325
4326 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4327
4328 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4329 return FALSE;
4330
4331 return TRUE;
4332 }
4333
4334 static bfd_boolean
4335 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4336 {
4337 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4338 struct mach_o_linkedit_data_command_external raw;
4339
4340 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4341 return FALSE;
4342
4343 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4344 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4345 return TRUE;
4346 }
4347
4348 static bfd_boolean
4349 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4350 {
4351 bfd_mach_o_str_command *cmd = &command->command.str;
4352 struct mach_o_str_command_external raw;
4353 unsigned long off;
4354
4355 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4356 return FALSE;
4357
4358 off = bfd_get_32 (abfd, raw.str);
4359 cmd->stroff = command->offset + off;
4360 cmd->str_len = command->len - off;
4361 cmd->str = bfd_alloc (abfd, cmd->str_len);
4362 if (cmd->str == NULL)
4363 return FALSE;
4364 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4365 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4366 return FALSE;
4367 return TRUE;
4368 }
4369
4370 static unsigned char *
4371 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4372 {
4373 unsigned char *buf;
4374
4375 buf = bfd_alloc (abfd, size);
4376 if (buf == NULL)
4377 return NULL;
4378 if (bfd_seek (abfd, off, SEEK_SET) != 0
4379 || bfd_bread (buf, size, abfd) != size)
4380 return NULL;
4381 return buf;
4382 }
4383
4384 static bfd_boolean
4385 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4386 {
4387 /* Read rebase content. */
4388 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4389 {
4390 cmd->rebase_content =
4391 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4392 if (cmd->rebase_content == NULL)
4393 return FALSE;
4394 }
4395
4396 /* Read bind content. */
4397 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4398 {
4399 cmd->bind_content =
4400 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4401 if (cmd->bind_content == NULL)
4402 return FALSE;
4403 }
4404
4405 /* Read weak bind content. */
4406 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4407 {
4408 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4409 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4410 if (cmd->weak_bind_content == NULL)
4411 return FALSE;
4412 }
4413
4414 /* Read lazy bind content. */
4415 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4416 {
4417 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4418 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4419 if (cmd->lazy_bind_content == NULL)
4420 return FALSE;
4421 }
4422
4423 /* Read export content. */
4424 if (cmd->export_content == NULL && cmd->export_size != 0)
4425 {
4426 cmd->export_content = bfd_mach_o_alloc_and_read
4427 (abfd, cmd->export_off, cmd->export_size);
4428 if (cmd->export_content == NULL)
4429 return FALSE;
4430 }
4431
4432 return TRUE;
4433 }
4434
4435 static bfd_boolean
4436 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4437 {
4438 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4439 struct mach_o_dyld_info_command_external raw;
4440
4441 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4442 return FALSE;
4443
4444 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4445 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4446 cmd->rebase_content = NULL;
4447 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4448 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4449 cmd->bind_content = NULL;
4450 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4451 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4452 cmd->weak_bind_content = NULL;
4453 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4454 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4455 cmd->lazy_bind_content = NULL;
4456 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4457 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4458 cmd->export_content = NULL;
4459 return TRUE;
4460 }
4461
4462 static bfd_boolean
4463 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4464 {
4465 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4466 struct mach_o_version_min_command_external raw;
4467 unsigned int ver;
4468
4469 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4470 return FALSE;
4471
4472 ver = bfd_get_32 (abfd, raw.version);
4473 cmd->rel = ver >> 16;
4474 cmd->maj = ver >> 8;
4475 cmd->min = ver;
4476 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4477 return TRUE;
4478 }
4479
4480 static bfd_boolean
4481 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4482 {
4483 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4484 struct mach_o_encryption_info_command_external raw;
4485
4486 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4487 return FALSE;
4488
4489 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4490 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4491 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4492 return TRUE;
4493 }
4494
4495 static bfd_boolean
4496 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4497 {
4498 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4499 struct mach_o_encryption_info_64_command_external raw;
4500
4501 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4502 return FALSE;
4503
4504 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4505 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4506 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4507 return TRUE;
4508 }
4509
4510 static bfd_boolean
4511 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4512 {
4513 bfd_mach_o_main_command *cmd = &command->command.main;
4514 struct mach_o_entry_point_command_external raw;
4515
4516 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4517 return FALSE;
4518
4519 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4520 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4521 return TRUE;
4522 }
4523
4524 static bfd_boolean
4525 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4526 {
4527 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4528 struct mach_o_source_version_command_external raw;
4529 bfd_uint64_t ver;
4530
4531 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4532 return FALSE;
4533
4534 ver = bfd_get_64 (abfd, raw.version);
4535 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4536 generates warnings) in case of the host doesn't support 64 bit
4537 integers. */
4538 cmd->e = ver & 0x3ff;
4539 ver >>= 10;
4540 cmd->d = ver & 0x3ff;
4541 ver >>= 10;
4542 cmd->c = ver & 0x3ff;
4543 ver >>= 10;
4544 cmd->b = ver & 0x3ff;
4545 ver >>= 10;
4546 cmd->a = ver & 0xffffff;
4547 return TRUE;
4548 }
4549
4550 static bfd_boolean
4551 bfd_mach_o_read_segment (bfd *abfd,
4552 bfd_mach_o_load_command *command,
4553 unsigned int wide)
4554 {
4555 bfd_mach_o_segment_command *seg = &command->command.segment;
4556 unsigned long i;
4557
4558 if (wide)
4559 {
4560 struct mach_o_segment_command_64_external raw;
4561
4562 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4563
4564 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4565 return FALSE;
4566
4567 memcpy (seg->segname, raw.segname, 16);
4568 seg->segname[16] = '\0';
4569
4570 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4571 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4572 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4573 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4574 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4575 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4576 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4577 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4578 }
4579 else
4580 {
4581 struct mach_o_segment_command_32_external raw;
4582
4583 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4584
4585 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4586 return FALSE;
4587
4588 memcpy (seg->segname, raw.segname, 16);
4589 seg->segname[16] = '\0';
4590
4591 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4592 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4593 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4594 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4595 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4596 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4597 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4598 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4599 }
4600 seg->sect_head = NULL;
4601 seg->sect_tail = NULL;
4602
4603 for (i = 0; i < seg->nsects; i++)
4604 {
4605 asection *sec;
4606
4607 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4608 if (sec == NULL)
4609 return FALSE;
4610
4611 bfd_mach_o_append_section_to_segment
4612 (seg, bfd_mach_o_get_mach_o_section (sec));
4613 }
4614
4615 return TRUE;
4616 }
4617
4618 static bfd_boolean
4619 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4620 {
4621 return bfd_mach_o_read_segment (abfd, command, 0);
4622 }
4623
4624 static bfd_boolean
4625 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4626 {
4627 return bfd_mach_o_read_segment (abfd, command, 1);
4628 }
4629
4630 static bfd_boolean
4631 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4632 {
4633 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4634 struct mach_o_load_command_external raw;
4635 unsigned int cmd;
4636
4637 /* Read command type and length. */
4638 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4639 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4640 return FALSE;
4641
4642 cmd = bfd_h_get_32 (abfd, raw.cmd);
4643 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4644 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4645 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4646
4647 switch (command->type)
4648 {
4649 case BFD_MACH_O_LC_SEGMENT:
4650 if (!bfd_mach_o_read_segment_32 (abfd, command))
4651 return FALSE;
4652 break;
4653 case BFD_MACH_O_LC_SEGMENT_64:
4654 if (!bfd_mach_o_read_segment_64 (abfd, command))
4655 return FALSE;
4656 break;
4657 case BFD_MACH_O_LC_SYMTAB:
4658 if (!bfd_mach_o_read_symtab (abfd, command))
4659 return FALSE;
4660 break;
4661 case BFD_MACH_O_LC_SYMSEG:
4662 break;
4663 case BFD_MACH_O_LC_THREAD:
4664 case BFD_MACH_O_LC_UNIXTHREAD:
4665 if (!bfd_mach_o_read_thread (abfd, command))
4666 return FALSE;
4667 break;
4668 case BFD_MACH_O_LC_LOAD_DYLINKER:
4669 case BFD_MACH_O_LC_ID_DYLINKER:
4670 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4671 if (!bfd_mach_o_read_dylinker (abfd, command))
4672 return FALSE;
4673 break;
4674 case BFD_MACH_O_LC_LOAD_DYLIB:
4675 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4676 case BFD_MACH_O_LC_ID_DYLIB:
4677 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4678 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4679 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4680 if (!bfd_mach_o_read_dylib (abfd, command))
4681 return FALSE;
4682 break;
4683 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4684 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4685 return FALSE;
4686 break;
4687 case BFD_MACH_O_LC_LOADFVMLIB:
4688 case BFD_MACH_O_LC_IDFVMLIB:
4689 if (!bfd_mach_o_read_fvmlib (abfd, command))
4690 return FALSE;
4691 break;
4692 case BFD_MACH_O_LC_IDENT:
4693 case BFD_MACH_O_LC_FVMFILE:
4694 case BFD_MACH_O_LC_PREPAGE:
4695 case BFD_MACH_O_LC_ROUTINES:
4696 case BFD_MACH_O_LC_ROUTINES_64:
4697 break;
4698 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4699 case BFD_MACH_O_LC_SUB_UMBRELLA:
4700 case BFD_MACH_O_LC_SUB_LIBRARY:
4701 case BFD_MACH_O_LC_SUB_CLIENT:
4702 case BFD_MACH_O_LC_RPATH:
4703 if (!bfd_mach_o_read_str (abfd, command))
4704 return FALSE;
4705 break;
4706 case BFD_MACH_O_LC_DYSYMTAB:
4707 if (!bfd_mach_o_read_dysymtab (abfd, command))
4708 return FALSE;
4709 break;
4710 case BFD_MACH_O_LC_PREBIND_CKSUM:
4711 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4712 return FALSE;
4713 break;
4714 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4715 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4716 return FALSE;
4717 break;
4718 case BFD_MACH_O_LC_UUID:
4719 if (!bfd_mach_o_read_uuid (abfd, command))
4720 return FALSE;
4721 break;
4722 case BFD_MACH_O_LC_CODE_SIGNATURE:
4723 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4724 case BFD_MACH_O_LC_FUNCTION_STARTS:
4725 case BFD_MACH_O_LC_DATA_IN_CODE:
4726 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4727 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4728 if (!bfd_mach_o_read_linkedit (abfd, command))
4729 return FALSE;
4730 break;
4731 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4732 if (!bfd_mach_o_read_encryption_info (abfd, command))
4733 return FALSE;
4734 break;
4735 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4736 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4737 return FALSE;
4738 break;
4739 case BFD_MACH_O_LC_DYLD_INFO:
4740 if (!bfd_mach_o_read_dyld_info (abfd, command))
4741 return FALSE;
4742 break;
4743 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4744 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4745 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4746 if (!bfd_mach_o_read_version_min (abfd, command))
4747 return FALSE;
4748 break;
4749 case BFD_MACH_O_LC_MAIN:
4750 if (!bfd_mach_o_read_main (abfd, command))
4751 return FALSE;
4752 break;
4753 case BFD_MACH_O_LC_SOURCE_VERSION:
4754 if (!bfd_mach_o_read_source_version (abfd, command))
4755 return FALSE;
4756 break;
4757 default:
4758 command->len = 0;
4759 _bfd_error_handler (_("%B: unknown load command 0x%lx"),
4760 abfd, (unsigned long) command->type);
4761 return FALSE;
4762 }
4763
4764 return TRUE;
4765 }
4766
4767 static void
4768 bfd_mach_o_flatten_sections (bfd *abfd)
4769 {
4770 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4771 bfd_mach_o_load_command *cmd;
4772 long csect = 0;
4773
4774 /* Count total number of sections. */
4775 mdata->nsects = 0;
4776
4777 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4778 {
4779 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4780 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4781 {
4782 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4783
4784 mdata->nsects += seg->nsects;
4785 }
4786 }
4787
4788 /* Allocate sections array. */
4789 mdata->sections = bfd_alloc2 (abfd,
4790 mdata->nsects, sizeof (bfd_mach_o_section *));
4791
4792 /* Fill the array. */
4793 csect = 0;
4794
4795 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4796 {
4797 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4798 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4799 {
4800 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4801 bfd_mach_o_section *sec;
4802
4803 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4804
4805 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4806 mdata->sections[csect++] = sec;
4807 }
4808 }
4809 }
4810
4811 static bfd_boolean
4812 bfd_mach_o_scan_start_address (bfd *abfd)
4813 {
4814 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4815 bfd_mach_o_thread_command *thr = NULL;
4816 bfd_mach_o_load_command *cmd;
4817 unsigned long i;
4818
4819 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4820 if (cmd->type == BFD_MACH_O_LC_THREAD
4821 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4822 {
4823 thr = &cmd->command.thread;
4824 break;
4825 }
4826 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4827 {
4828 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4829 bfd_mach_o_section *text_sect = mdata->sections[0];
4830
4831 if (text_sect)
4832 {
4833 abfd->start_address = main_cmd->entryoff
4834 + (text_sect->addr - text_sect->offset);
4835 return TRUE;
4836 }
4837 }
4838
4839 /* An object file has no start address, so do not fail if not found. */
4840 if (thr == NULL)
4841 return TRUE;
4842
4843 /* FIXME: create a subtarget hook ? */
4844 for (i = 0; i < thr->nflavours; i++)
4845 {
4846 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4847 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4848 {
4849 unsigned char buf[4];
4850
4851 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4852 || bfd_bread (buf, 4, abfd) != 4)
4853 return FALSE;
4854
4855 abfd->start_address = bfd_h_get_32 (abfd, buf);
4856 }
4857 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4858 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4859 {
4860 unsigned char buf[4];
4861
4862 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4863 || bfd_bread (buf, 4, abfd) != 4)
4864 return FALSE;
4865
4866 abfd->start_address = bfd_h_get_32 (abfd, buf);
4867 }
4868 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4869 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4870 {
4871 unsigned char buf[8];
4872
4873 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4874 || bfd_bread (buf, 8, abfd) != 8)
4875 return FALSE;
4876
4877 abfd->start_address = bfd_h_get_64 (abfd, buf);
4878 }
4879 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4880 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4881 {
4882 unsigned char buf[8];
4883
4884 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4885 || bfd_bread (buf, 8, abfd) != 8)
4886 return FALSE;
4887
4888 abfd->start_address = bfd_h_get_64 (abfd, buf);
4889 }
4890 }
4891
4892 return TRUE;
4893 }
4894
4895 bfd_boolean
4896 bfd_mach_o_set_arch_mach (bfd *abfd,
4897 enum bfd_architecture arch,
4898 unsigned long machine)
4899 {
4900 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4901
4902 /* If this isn't the right architecture for this backend, and this
4903 isn't the generic backend, fail. */
4904 if (arch != bed->arch
4905 && arch != bfd_arch_unknown
4906 && bed->arch != bfd_arch_unknown)
4907 return FALSE;
4908
4909 return bfd_default_set_arch_mach (abfd, arch, machine);
4910 }
4911
4912 static bfd_boolean
4913 bfd_mach_o_scan (bfd *abfd,
4914 bfd_mach_o_header *header,
4915 bfd_mach_o_data_struct *mdata)
4916 {
4917 unsigned int i;
4918 enum bfd_architecture cputype;
4919 unsigned long cpusubtype;
4920 unsigned int hdrsize;
4921
4922 hdrsize = mach_o_wide_p (header) ?
4923 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4924
4925 mdata->header = *header;
4926
4927 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4928 switch (header->filetype)
4929 {
4930 case BFD_MACH_O_MH_OBJECT:
4931 abfd->flags |= HAS_RELOC;
4932 break;
4933 case BFD_MACH_O_MH_EXECUTE:
4934 abfd->flags |= EXEC_P;
4935 break;
4936 case BFD_MACH_O_MH_DYLIB:
4937 case BFD_MACH_O_MH_BUNDLE:
4938 abfd->flags |= DYNAMIC;
4939 break;
4940 }
4941
4942 abfd->tdata.mach_o_data = mdata;
4943
4944 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4945 &cputype, &cpusubtype);
4946 if (cputype == bfd_arch_unknown)
4947 {
4948 _bfd_error_handler
4949 /* xgettext:c-format */
4950 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4951 header->cputype, header->cpusubtype);
4952 return FALSE;
4953 }
4954
4955 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4956
4957 if (header->ncmds != 0)
4958 {
4959 bfd_mach_o_load_command *cmd;
4960
4961 mdata->first_command = NULL;
4962 mdata->last_command = NULL;
4963
4964 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
4965 if (cmd == NULL)
4966 return FALSE;
4967
4968 for (i = 0; i < header->ncmds; i++)
4969 {
4970 bfd_mach_o_load_command *cur = &cmd[i];
4971
4972 bfd_mach_o_append_command (abfd, cur);
4973
4974 if (i == 0)
4975 cur->offset = hdrsize;
4976 else
4977 {
4978 bfd_mach_o_load_command *prev = &cmd[i - 1];
4979 cur->offset = prev->offset + prev->len;
4980 }
4981
4982 if (!bfd_mach_o_read_command (abfd, cur))
4983 return FALSE;
4984 }
4985 }
4986
4987 /* Sections should be flatten before scanning start address. */
4988 bfd_mach_o_flatten_sections (abfd);
4989 if (!bfd_mach_o_scan_start_address (abfd))
4990 return FALSE;
4991
4992 return TRUE;
4993 }
4994
4995 bfd_boolean
4996 bfd_mach_o_mkobject_init (bfd *abfd)
4997 {
4998 bfd_mach_o_data_struct *mdata = NULL;
4999
5000 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5001 if (mdata == NULL)
5002 return FALSE;
5003 abfd->tdata.mach_o_data = mdata;
5004
5005 mdata->header.magic = 0;
5006 mdata->header.cputype = 0;
5007 mdata->header.cpusubtype = 0;
5008 mdata->header.filetype = 0;
5009 mdata->header.ncmds = 0;
5010 mdata->header.sizeofcmds = 0;
5011 mdata->header.flags = 0;
5012 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5013 mdata->first_command = NULL;
5014 mdata->last_command = NULL;
5015 mdata->nsects = 0;
5016 mdata->sections = NULL;
5017 mdata->dyn_reloc_cache = NULL;
5018
5019 return TRUE;
5020 }
5021
5022 static bfd_boolean
5023 bfd_mach_o_gen_mkobject (bfd *abfd)
5024 {
5025 bfd_mach_o_data_struct *mdata;
5026
5027 if (!bfd_mach_o_mkobject_init (abfd))
5028 return FALSE;
5029
5030 mdata = bfd_mach_o_get_data (abfd);
5031 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5032 mdata->header.cputype = 0;
5033 mdata->header.cpusubtype = 0;
5034 mdata->header.byteorder = abfd->xvec->byteorder;
5035 mdata->header.version = 1;
5036
5037 return TRUE;
5038 }
5039
5040 const bfd_target *
5041 bfd_mach_o_header_p (bfd *abfd,
5042 file_ptr hdr_off,
5043 bfd_mach_o_filetype filetype,
5044 bfd_mach_o_cpu_type cputype)
5045 {
5046 bfd_mach_o_header header;
5047 bfd_mach_o_data_struct *mdata;
5048
5049 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5050 goto wrong;
5051
5052 if (! (header.byteorder == BFD_ENDIAN_BIG
5053 || header.byteorder == BFD_ENDIAN_LITTLE))
5054 {
5055 _bfd_error_handler (_("unknown header byte-order value 0x%lx"),
5056 (unsigned long) header.byteorder);
5057 goto wrong;
5058 }
5059
5060 if (! ((header.byteorder == BFD_ENDIAN_BIG
5061 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5062 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5063 || (header.byteorder == BFD_ENDIAN_LITTLE
5064 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5065 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5066 goto wrong;
5067
5068 /* Check cputype and filetype.
5069 In case of wildcard, do not accept magics that are handled by existing
5070 targets. */
5071 if (cputype)
5072 {
5073 if (header.cputype != cputype)
5074 goto wrong;
5075 }
5076 else
5077 {
5078 #ifndef BFD64
5079 /* Do not recognize 64 architectures if not configured for 64bit targets.
5080 This could happen only for generic targets. */
5081 if (mach_o_wide_p (&header))
5082 goto wrong;
5083 #endif
5084 }
5085
5086 if (filetype)
5087 {
5088 if (header.filetype != filetype)
5089 goto wrong;
5090 }
5091 else
5092 {
5093 switch (header.filetype)
5094 {
5095 case BFD_MACH_O_MH_CORE:
5096 /* Handled by core_p */
5097 goto wrong;
5098 default:
5099 break;
5100 }
5101 }
5102
5103 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5104 if (mdata == NULL)
5105 goto fail;
5106 mdata->hdr_offset = hdr_off;
5107
5108 if (!bfd_mach_o_scan (abfd, &header, mdata))
5109 goto wrong;
5110
5111 return abfd->xvec;
5112
5113 wrong:
5114 bfd_set_error (bfd_error_wrong_format);
5115
5116 fail:
5117 return NULL;
5118 }
5119
5120 static const bfd_target *
5121 bfd_mach_o_gen_object_p (bfd *abfd)
5122 {
5123 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5124 }
5125
5126 static const bfd_target *
5127 bfd_mach_o_gen_core_p (bfd *abfd)
5128 {
5129 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5130 }
5131
5132 /* Return the base address of ABFD, ie the address at which the image is
5133 mapped. The possible initial pagezero is ignored. */
5134
5135 bfd_vma
5136 bfd_mach_o_get_base_address (bfd *abfd)
5137 {
5138 bfd_mach_o_data_struct *mdata;
5139 bfd_mach_o_load_command *cmd;
5140
5141 /* Check for Mach-O. */
5142 if (!bfd_mach_o_valid (abfd))
5143 return 0;
5144 mdata = bfd_mach_o_get_data (abfd);
5145
5146 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5147 {
5148 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5149 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5150 {
5151 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5152
5153 if (segcmd->initprot != 0)
5154 return segcmd->vmaddr;
5155 }
5156 }
5157 return 0;
5158 }
5159
5160 typedef struct mach_o_fat_archentry
5161 {
5162 unsigned long cputype;
5163 unsigned long cpusubtype;
5164 unsigned long offset;
5165 unsigned long size;
5166 unsigned long align;
5167 } mach_o_fat_archentry;
5168
5169 typedef struct mach_o_fat_data_struct
5170 {
5171 unsigned long magic;
5172 unsigned long nfat_arch;
5173 mach_o_fat_archentry *archentries;
5174 } mach_o_fat_data_struct;
5175
5176 const bfd_target *
5177 bfd_mach_o_fat_archive_p (bfd *abfd)
5178 {
5179 mach_o_fat_data_struct *adata = NULL;
5180 struct mach_o_fat_header_external hdr;
5181 unsigned long i;
5182
5183 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5184 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5185 goto error;
5186
5187 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5188 if (adata == NULL)
5189 goto error;
5190
5191 adata->magic = bfd_getb32 (hdr.magic);
5192 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5193 if (adata->magic != 0xcafebabe)
5194 goto error;
5195 /* Avoid matching Java bytecode files, which have the same magic number.
5196 In the Java bytecode file format this field contains the JVM version,
5197 which starts at 43.0. */
5198 if (adata->nfat_arch > 30)
5199 goto error;
5200
5201 adata->archentries =
5202 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5203 if (adata->archentries == NULL)
5204 goto error;
5205
5206 for (i = 0; i < adata->nfat_arch; i++)
5207 {
5208 struct mach_o_fat_arch_external arch;
5209 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5210 goto error;
5211 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5212 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5213 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5214 adata->archentries[i].size = bfd_getb32 (arch.size);
5215 adata->archentries[i].align = bfd_getb32 (arch.align);
5216 }
5217
5218 abfd->tdata.mach_o_fat_data = adata;
5219
5220 return abfd->xvec;
5221
5222 error:
5223 if (adata != NULL)
5224 bfd_release (abfd, adata);
5225 bfd_set_error (bfd_error_wrong_format);
5226 return NULL;
5227 }
5228
5229 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5230 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5231 Set arelt_data and origin fields too. */
5232
5233 static void
5234 bfd_mach_o_fat_member_init (bfd *abfd,
5235 enum bfd_architecture arch_type,
5236 unsigned long arch_subtype,
5237 mach_o_fat_archentry *entry)
5238 {
5239 struct areltdata *areltdata;
5240 /* Create the member filename. Use ARCH_NAME. */
5241 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5242
5243 if (ap)
5244 {
5245 /* Use the architecture name if known. */
5246 abfd->filename = xstrdup (ap->printable_name);
5247 }
5248 else
5249 {
5250 /* Forge a uniq id. */
5251 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5252 char *name = xmalloc (namelen);
5253 snprintf (name, namelen, "0x%lx-0x%lx",
5254 entry->cputype, entry->cpusubtype);
5255 abfd->filename = name;
5256 }
5257
5258 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5259 areltdata->parsed_size = entry->size;
5260 abfd->arelt_data = areltdata;
5261 abfd->iostream = NULL;
5262 abfd->origin = entry->offset;
5263 }
5264
5265 bfd *
5266 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5267 {
5268 mach_o_fat_data_struct *adata;
5269 mach_o_fat_archentry *entry = NULL;
5270 unsigned long i;
5271 bfd *nbfd;
5272 enum bfd_architecture arch_type;
5273 unsigned long arch_subtype;
5274
5275 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5276 BFD_ASSERT (adata != NULL);
5277
5278 /* Find index of previous entry. */
5279 if (prev == NULL)
5280 {
5281 /* Start at first one. */
5282 i = 0;
5283 }
5284 else
5285 {
5286 /* Find index of PREV. */
5287 for (i = 0; i < adata->nfat_arch; i++)
5288 {
5289 if (adata->archentries[i].offset == prev->origin)
5290 break;
5291 }
5292
5293 if (i == adata->nfat_arch)
5294 {
5295 /* Not found. */
5296 bfd_set_error (bfd_error_bad_value);
5297 return NULL;
5298 }
5299
5300 /* Get next entry. */
5301 i++;
5302 }
5303
5304 if (i >= adata->nfat_arch)
5305 {
5306 bfd_set_error (bfd_error_no_more_archived_files);
5307 return NULL;
5308 }
5309
5310 entry = &adata->archentries[i];
5311 nbfd = _bfd_new_bfd_contained_in (archive);
5312 if (nbfd == NULL)
5313 return NULL;
5314
5315 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5316 &arch_type, &arch_subtype);
5317
5318 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5319
5320 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5321
5322 return nbfd;
5323 }
5324
5325 /* Analogous to stat call. */
5326
5327 static int
5328 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5329 {
5330 if (abfd->arelt_data == NULL)
5331 {
5332 bfd_set_error (bfd_error_invalid_operation);
5333 return -1;
5334 }
5335
5336 buf->st_mtime = 0;
5337 buf->st_uid = 0;
5338 buf->st_gid = 0;
5339 buf->st_mode = 0644;
5340 buf->st_size = arelt_size (abfd);
5341
5342 return 0;
5343 }
5344
5345 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5346 If ABFD is a fat image containing a member that corresponds to FORMAT
5347 and ARCH, returns it.
5348 In other case, returns NULL.
5349 This function allows transparent uses of fat images. */
5350
5351 bfd *
5352 bfd_mach_o_fat_extract (bfd *abfd,
5353 bfd_format format,
5354 const bfd_arch_info_type *arch)
5355 {
5356 bfd *res;
5357 mach_o_fat_data_struct *adata;
5358 unsigned int i;
5359
5360 if (bfd_check_format (abfd, format))
5361 {
5362 if (bfd_get_arch_info (abfd) == arch)
5363 return abfd;
5364 return NULL;
5365 }
5366 if (!bfd_check_format (abfd, bfd_archive)
5367 || abfd->xvec != &mach_o_fat_vec)
5368 return NULL;
5369
5370 /* This is a Mach-O fat image. */
5371 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5372 BFD_ASSERT (adata != NULL);
5373
5374 for (i = 0; i < adata->nfat_arch; i++)
5375 {
5376 struct mach_o_fat_archentry *e = &adata->archentries[i];
5377 enum bfd_architecture cpu_type;
5378 unsigned long cpu_subtype;
5379
5380 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5381 &cpu_type, &cpu_subtype);
5382 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5383 continue;
5384
5385 /* The architecture is found. */
5386 res = _bfd_new_bfd_contained_in (abfd);
5387 if (res == NULL)
5388 return NULL;
5389
5390 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5391
5392 if (bfd_check_format (res, format))
5393 {
5394 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5395 return res;
5396 }
5397 bfd_close (res);
5398 return NULL;
5399 }
5400
5401 return NULL;
5402 }
5403
5404 int
5405 bfd_mach_o_lookup_command (bfd *abfd,
5406 bfd_mach_o_load_command_type type,
5407 bfd_mach_o_load_command **mcommand)
5408 {
5409 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5410 struct bfd_mach_o_load_command *cmd;
5411 unsigned int num;
5412
5413 BFD_ASSERT (mdata != NULL);
5414 BFD_ASSERT (mcommand != NULL);
5415
5416 num = 0;
5417 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5418 {
5419 if (cmd->type != type)
5420 continue;
5421
5422 if (num == 0)
5423 *mcommand = cmd;
5424 num++;
5425 }
5426
5427 return num;
5428 }
5429
5430 unsigned long
5431 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5432 {
5433 switch (type)
5434 {
5435 case BFD_MACH_O_CPU_TYPE_MC680x0:
5436 return 0x04000000;
5437 case BFD_MACH_O_CPU_TYPE_MC88000:
5438 return 0xffffe000;
5439 case BFD_MACH_O_CPU_TYPE_POWERPC:
5440 return 0xc0000000;
5441 case BFD_MACH_O_CPU_TYPE_I386:
5442 return 0xc0000000;
5443 case BFD_MACH_O_CPU_TYPE_SPARC:
5444 return 0xf0000000;
5445 case BFD_MACH_O_CPU_TYPE_I860:
5446 return 0;
5447 case BFD_MACH_O_CPU_TYPE_HPPA:
5448 return 0xc0000000 - 0x04000000;
5449 default:
5450 return 0;
5451 }
5452 }
5453
5454 /* The following two tables should be kept, as far as possible, in order of
5455 most frequently used entries to optimize their use from gas. */
5456
5457 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5458 {
5459 { "regular", BFD_MACH_O_S_REGULAR},
5460 { "coalesced", BFD_MACH_O_S_COALESCED},
5461 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5462 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5463 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5464 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5465 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5466 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5467 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5468 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5469 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5470 { "interposing", BFD_MACH_O_S_INTERPOSING},
5471 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5472 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5473 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5474 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5475 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5476 { NULL, 0}
5477 };
5478
5479 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5480 {
5481 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5482 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5483 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5484 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5485 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5486 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5487 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5488 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5489 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5490 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5491 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5492 { NULL, 0}
5493 };
5494
5495 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5496
5497 unsigned int
5498 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5499 {
5500 const bfd_mach_o_xlat_name *x;
5501 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5502
5503 for (x = bfd_mach_o_section_type_name; x->name; x++)
5504 if (strcmp (x->name, name) == 0)
5505 {
5506 /* We found it... does the target support it? */
5507 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5508 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5509 return x->val; /* OK. */
5510 else
5511 break; /* Not supported. */
5512 }
5513 /* Maximum section ID = 0xff. */
5514 return 256;
5515 }
5516
5517 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5518
5519 unsigned int
5520 bfd_mach_o_get_section_attribute_from_name (const char *name)
5521 {
5522 const bfd_mach_o_xlat_name *x;
5523
5524 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5525 if (strcmp (x->name, name) == 0)
5526 return x->val;
5527 return (unsigned int)-1;
5528 }
5529
5530 int
5531 bfd_mach_o_core_fetch_environment (bfd *abfd,
5532 unsigned char **rbuf,
5533 unsigned int *rlen)
5534 {
5535 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5536 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5537 bfd_mach_o_load_command *cmd;
5538
5539 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5540 {
5541 bfd_mach_o_segment_command *seg;
5542
5543 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5544 continue;
5545
5546 seg = &cmd->command.segment;
5547
5548 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5549 {
5550 unsigned long start = seg->fileoff;
5551 unsigned long end = seg->fileoff + seg->filesize;
5552 unsigned char *buf = bfd_malloc (1024);
5553 unsigned long size = 1024;
5554
5555 for (;;)
5556 {
5557 bfd_size_type nread = 0;
5558 unsigned long offset;
5559 int found_nonnull = 0;
5560
5561 if (size > (end - start))
5562 size = (end - start);
5563
5564 buf = bfd_realloc_or_free (buf, size);
5565 if (buf == NULL)
5566 return -1;
5567
5568 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5569 {
5570 free (buf);
5571 return -1;
5572 }
5573
5574 nread = bfd_bread (buf, size, abfd);
5575
5576 if (nread != size)
5577 {
5578 free (buf);
5579 return -1;
5580 }
5581
5582 for (offset = 4; offset <= size; offset += 4)
5583 {
5584 unsigned long val;
5585
5586 val = *((unsigned long *) (buf + size - offset));
5587 if (! found_nonnull)
5588 {
5589 if (val != 0)
5590 found_nonnull = 1;
5591 }
5592 else if (val == 0x0)
5593 {
5594 unsigned long bottom;
5595 unsigned long top;
5596
5597 bottom = seg->fileoff + seg->filesize - offset;
5598 top = seg->fileoff + seg->filesize - 4;
5599 *rbuf = bfd_malloc (top - bottom);
5600 *rlen = top - bottom;
5601
5602 memcpy (*rbuf, buf + size - *rlen, *rlen);
5603 free (buf);
5604 return 0;
5605 }
5606 }
5607
5608 if (size == (end - start))
5609 break;
5610
5611 size *= 2;
5612 }
5613
5614 free (buf);
5615 }
5616 }
5617
5618 return -1;
5619 }
5620
5621 char *
5622 bfd_mach_o_core_file_failing_command (bfd *abfd)
5623 {
5624 unsigned char *buf = NULL;
5625 unsigned int len = 0;
5626 int ret;
5627
5628 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5629 if (ret < 0)
5630 return NULL;
5631
5632 return (char *) buf;
5633 }
5634
5635 int
5636 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5637 {
5638 return 0;
5639 }
5640
5641 static bfd_mach_o_uuid_command *
5642 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5643 {
5644 bfd_mach_o_load_command *uuid_cmd = NULL;
5645 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5646 if (ncmd != 1 || uuid_cmd == NULL)
5647 return FALSE;
5648 return &uuid_cmd->command.uuid;
5649 }
5650
5651 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5652
5653 static bfd_boolean
5654 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5655 {
5656 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5657
5658 BFD_ASSERT (abfd);
5659 BFD_ASSERT (uuid_cmd);
5660
5661 if (!bfd_check_format (abfd, bfd_object))
5662 return FALSE;
5663
5664 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5665 || bfd_mach_o_get_data (abfd) == NULL
5666 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5667 return FALSE;
5668
5669 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5670 if (dsym_uuid_cmd == NULL)
5671 return FALSE;
5672
5673 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5674 sizeof (uuid_cmd->uuid)) != 0)
5675 return FALSE;
5676
5677 return TRUE;
5678 }
5679
5680 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5681 The caller is responsible for closing the returned BFD object and
5682 its my_archive if the returned BFD is in a fat dSYM. */
5683
5684 static bfd *
5685 bfd_mach_o_find_dsym (const char *dsym_filename,
5686 const bfd_mach_o_uuid_command *uuid_cmd,
5687 const bfd_arch_info_type *arch)
5688 {
5689 bfd *base_dsym_bfd, *dsym_bfd;
5690
5691 BFD_ASSERT (uuid_cmd);
5692
5693 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5694 if (base_dsym_bfd == NULL)
5695 return NULL;
5696
5697 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5698 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5699 return dsym_bfd;
5700
5701 bfd_close (dsym_bfd);
5702 if (base_dsym_bfd != dsym_bfd)
5703 bfd_close (base_dsym_bfd);
5704
5705 return NULL;
5706 }
5707
5708 /* Return a BFD created from a dSYM file for ABFD.
5709 The caller is responsible for closing the returned BFD object, its
5710 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5711
5712 static bfd *
5713 bfd_mach_o_follow_dsym (bfd *abfd)
5714 {
5715 char *dsym_filename;
5716 bfd_mach_o_uuid_command *uuid_cmd;
5717 bfd *dsym_bfd, *base_bfd = abfd;
5718 const char *base_basename;
5719
5720 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5721 return NULL;
5722
5723 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5724 base_bfd = abfd->my_archive;
5725 /* BFD may have been opened from a stream. */
5726 if (base_bfd->filename == NULL)
5727 {
5728 bfd_set_error (bfd_error_invalid_operation);
5729 return NULL;
5730 }
5731 base_basename = lbasename (base_bfd->filename);
5732
5733 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5734 if (uuid_cmd == NULL)
5735 return NULL;
5736
5737 /* TODO: We assume the DWARF file has the same as the binary's.
5738 It seems apple's GDB checks all files in the dSYM bundle directory.
5739 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5740 */
5741 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5742 + strlen (dsym_subdir) + 1
5743 + strlen (base_basename) + 1);
5744 sprintf (dsym_filename, "%s%s/%s",
5745 base_bfd->filename, dsym_subdir, base_basename);
5746
5747 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5748 bfd_get_arch_info (abfd));
5749 if (dsym_bfd == NULL)
5750 free (dsym_filename);
5751
5752 return dsym_bfd;
5753 }
5754
5755 bfd_boolean
5756 bfd_mach_o_find_nearest_line (bfd *abfd,
5757 asymbol **symbols,
5758 asection *section,
5759 bfd_vma offset,
5760 const char **filename_ptr,
5761 const char **functionname_ptr,
5762 unsigned int *line_ptr,
5763 unsigned int *discriminator_ptr)
5764 {
5765 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5766 if (mdata == NULL)
5767 return FALSE;
5768 switch (mdata->header.filetype)
5769 {
5770 case BFD_MACH_O_MH_OBJECT:
5771 break;
5772 case BFD_MACH_O_MH_EXECUTE:
5773 case BFD_MACH_O_MH_DYLIB:
5774 case BFD_MACH_O_MH_BUNDLE:
5775 case BFD_MACH_O_MH_KEXT_BUNDLE:
5776 if (mdata->dwarf2_find_line_info == NULL)
5777 {
5778 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5779 /* When we couldn't find dSYM for this binary, we look for
5780 the debug information in the binary itself. In this way,
5781 we won't try finding separated dSYM again because
5782 mdata->dwarf2_find_line_info will be filled. */
5783 if (! mdata->dsym_bfd)
5784 break;
5785 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5786 dwarf_debug_sections, symbols,
5787 &mdata->dwarf2_find_line_info,
5788 FALSE))
5789 return FALSE;
5790 }
5791 break;
5792 default:
5793 return FALSE;
5794 }
5795 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5796 filename_ptr, functionname_ptr,
5797 line_ptr, discriminator_ptr,
5798 dwarf_debug_sections, 0,
5799 &mdata->dwarf2_find_line_info);
5800 }
5801
5802 bfd_boolean
5803 bfd_mach_o_close_and_cleanup (bfd *abfd)
5804 {
5805 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5806 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5807 {
5808 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5809 bfd_mach_o_free_cached_info (abfd);
5810 if (mdata->dsym_bfd != NULL)
5811 {
5812 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5813 #if 0
5814 /* FIXME: PR 19435: This calculation to find the memory allocated by
5815 bfd_mach_o_follow_dsym for the filename does not always end up
5816 selecting the correct pointer. Unfortunately this problem is
5817 very hard to reproduce on a non Mach-O native system, so until it
5818 can be traced and fixed on such a system, this code will remain
5819 commented out. This does mean that there will be a memory leak,
5820 but it is small, and happens when we are closing down, so it
5821 should not matter too much. */
5822 char *dsym_filename = (char *)(fat_bfd
5823 ? fat_bfd->filename
5824 : mdata->dsym_bfd->filename);
5825 #endif
5826 bfd_close (mdata->dsym_bfd);
5827 mdata->dsym_bfd = NULL;
5828 if (fat_bfd)
5829 bfd_close (fat_bfd);
5830 #if 0
5831 free (dsym_filename);
5832 #endif
5833 }
5834 }
5835
5836 return _bfd_generic_close_and_cleanup (abfd);
5837 }
5838
5839 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5840 {
5841 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5842 asection *asect;
5843 free (mdata->dyn_reloc_cache);
5844 mdata->dyn_reloc_cache = NULL;
5845 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5846 {
5847 free (asect->relocation);
5848 asect->relocation = NULL;
5849 }
5850
5851 return TRUE;
5852 }
5853
5854 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5855 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5856
5857 #define bfd_mach_o_canonicalize_one_reloc NULL
5858 #define bfd_mach_o_swap_reloc_out NULL
5859 #define bfd_mach_o_print_thread NULL
5860 #define bfd_mach_o_tgt_seg_table NULL
5861 #define bfd_mach_o_section_type_valid_for_tgt NULL
5862
5863 #define TARGET_NAME mach_o_be_vec
5864 #define TARGET_STRING "mach-o-be"
5865 #define TARGET_ARCHITECTURE bfd_arch_unknown
5866 #define TARGET_PAGESIZE 1
5867 #define TARGET_BIG_ENDIAN 1
5868 #define TARGET_ARCHIVE 0
5869 #define TARGET_PRIORITY 1
5870 #include "mach-o-target.c"
5871
5872 #undef TARGET_NAME
5873 #undef TARGET_STRING
5874 #undef TARGET_ARCHITECTURE
5875 #undef TARGET_PAGESIZE
5876 #undef TARGET_BIG_ENDIAN
5877 #undef TARGET_ARCHIVE
5878 #undef TARGET_PRIORITY
5879
5880 #define TARGET_NAME mach_o_le_vec
5881 #define TARGET_STRING "mach-o-le"
5882 #define TARGET_ARCHITECTURE bfd_arch_unknown
5883 #define TARGET_PAGESIZE 1
5884 #define TARGET_BIG_ENDIAN 0
5885 #define TARGET_ARCHIVE 0
5886 #define TARGET_PRIORITY 1
5887
5888 #include "mach-o-target.c"
5889
5890 #undef TARGET_NAME
5891 #undef TARGET_STRING
5892 #undef TARGET_ARCHITECTURE
5893 #undef TARGET_PAGESIZE
5894 #undef TARGET_BIG_ENDIAN
5895 #undef TARGET_ARCHIVE
5896 #undef TARGET_PRIORITY
5897
5898 /* Not yet handled: creating an archive. */
5899 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5900
5901 #define bfd_mach_o_close_and_cleanup bfd_true
5902
5903 /* Not used. */
5904 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5905 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
5906 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
5907
5908 #define TARGET_NAME mach_o_fat_vec
5909 #define TARGET_STRING "mach-o-fat"
5910 #define TARGET_ARCHITECTURE bfd_arch_unknown
5911 #define TARGET_PAGESIZE 1
5912 #define TARGET_BIG_ENDIAN 1
5913 #define TARGET_ARCHIVE 1
5914 #define TARGET_PRIORITY 0
5915
5916 #include "mach-o-target.c"
5917
5918 #undef TARGET_NAME
5919 #undef TARGET_STRING
5920 #undef TARGET_ARCHITECTURE
5921 #undef TARGET_PAGESIZE
5922 #undef TARGET_BIG_ENDIAN
5923 #undef TARGET_ARCHIVE
5924 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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