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Remove m88k support
[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn)))
39
40 static bfd_boolean
41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
42
43 unsigned int
44 bfd_mach_o_version (bfd *abfd)
45 {
46 bfd_mach_o_data_struct *mdata = NULL;
47
48 BFD_ASSERT (bfd_mach_o_valid (abfd));
49 mdata = bfd_mach_o_get_data (abfd);
50
51 return mdata->header.version;
52 }
53
54 bfd_boolean
55 bfd_mach_o_valid (bfd *abfd)
56 {
57 if (abfd == NULL || abfd->xvec == NULL)
58 return FALSE;
59
60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
61 return FALSE;
62
63 if (bfd_mach_o_get_data (abfd) == NULL)
64 return FALSE;
65 return TRUE;
66 }
67
68 static INLINE bfd_boolean
69 mach_o_wide_p (bfd_mach_o_header *header)
70 {
71 switch (header->version)
72 {
73 case 1:
74 return FALSE;
75 case 2:
76 return TRUE;
77 default:
78 BFD_FAIL ();
79 return FALSE;
80 }
81 }
82
83 static INLINE bfd_boolean
84 bfd_mach_o_wide_p (bfd *abfd)
85 {
86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
87 }
88
89 /* Tables to translate well known Mach-O segment/section names to bfd
90 names. Use of canonical names (such as .text or .debug_frame) is required
91 by gdb. */
92
93 /* __TEXT Segment. */
94 static const mach_o_section_name_xlat text_section_names_xlat[] =
95 {
96 { ".text", "__text",
97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
99 { ".const", "__const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".static_const", "__static_const",
103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
104 BFD_MACH_O_S_ATTR_NONE, 0},
105 { ".cstring", "__cstring",
106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
107 BFD_MACH_O_S_CSTRING_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 0},
109 { ".literal4", "__literal4",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 2},
112 { ".literal8", "__literal8",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 3},
115 { ".literal16", "__literal16",
116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
117 BFD_MACH_O_S_ATTR_NONE, 4},
118 { ".constructor", "__constructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".destructor", "__destructor",
122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
123 BFD_MACH_O_S_ATTR_NONE, 0},
124 { ".eh_frame", "__eh_frame",
125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
128 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
129 { NULL, NULL, 0, 0, 0, 0}
130 };
131
132 /* __DATA Segment. */
133 static const mach_o_section_name_xlat data_section_names_xlat[] =
134 {
135 { ".data", "__data",
136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".bss", "__bss",
139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".const_data", "__const",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".static_data", "__static_data",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
146 BFD_MACH_O_S_ATTR_NONE, 0},
147 { ".mod_init_func", "__mod_init_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".mod_term_func", "__mod_term_func",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
152 BFD_MACH_O_S_ATTR_NONE, 2},
153 { ".dyld", "__dyld",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 0},
156 { ".cfstring", "__cfstring",
157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
158 BFD_MACH_O_S_ATTR_NONE, 2},
159 { NULL, NULL, 0, 0, 0, 0}
160 };
161
162 /* __DWARF Segment. */
163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
164 {
165 { ".debug_frame", "__debug_frame",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_info", "__debug_info",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_abbrev", "__debug_abbrev",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_aranges", "__debug_aranges",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_macinfo", "__debug_macinfo",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_line", "__debug_line",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_loc", "__debug_loc",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubnames", "__debug_pubnames",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_pubtypes", "__debug_pubtypes",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_str", "__debug_str",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_ranges", "__debug_ranges",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_macro", "__debug_macro",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { ".debug_gdb_scripts", "__debug_gdb_scri",
202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
203 BFD_MACH_O_S_ATTR_DEBUG, 0},
204 { NULL, NULL, 0, 0, 0, 0}
205 };
206
207 /* __OBJC Segment. */
208 static const mach_o_section_name_xlat objc_section_names_xlat[] =
209 {
210 { ".objc_class", "__class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_meta_class", "__meta_class",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_cls_meth", "__cat_cls_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_cat_inst_meth", "__cat_inst_meth",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_protocol", "__protocol",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_string_object", "__string_object",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_cls_meth", "__cls_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_inst_meth", "__inst_meth",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_cls_refs", "__cls_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_message_refs", "__message_refs",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_symbols", "__symbols",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_category", "__category",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_class_vars", "__class_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_instance_vars", "__instance_vars",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_module_info", "__module_info",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_selector_strs", "__selector_strs",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_image_info", "__image_info",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 { ".objc_selector_fixup", "__sel_fixup",
262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
264 /* Objc V1 */
265 { ".objc1_class_ext", "__class_ext",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_property_list", "__property",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { ".objc1_protocol_ext", "__protocol_ext",
272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
274 { NULL, NULL, 0, 0, 0, 0}
275 };
276
277 static const mach_o_segment_name_xlat segsec_names_xlat[] =
278 {
279 { "__TEXT", text_section_names_xlat },
280 { "__DATA", data_section_names_xlat },
281 { "__DWARF", dwarf_section_names_xlat },
282 { "__OBJC", objc_section_names_xlat },
283 { NULL, NULL }
284 };
285
286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
287
288 /* For both cases bfd-name => mach-o name and vice versa, the specific target
289 is checked before the generic. This allows a target (e.g. ppc for cstring)
290 to override the generic definition with a more specific one. */
291
292 /* Fetch the translation from a Mach-O section designation (segment, section)
293 as a bfd short name, if one exists. Otherwise return NULL.
294
295 Allow the segment and section names to be unterminated 16 byte arrays. */
296
297 const mach_o_section_name_xlat *
298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
299 const char *sectname)
300 {
301 const struct mach_o_segment_name_xlat *seg;
302 const mach_o_section_name_xlat *sec;
303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
304
305 /* First try any target-specific translations defined... */
306 if (bed->segsec_names_xlat)
307 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
309 for (sec = seg->sections; sec->mach_o_name; sec++)
310 if (strncmp (sec->mach_o_name, sectname,
311 BFD_MACH_O_SECTNAME_SIZE) == 0)
312 return sec;
313
314 /* ... and then the Mach-O generic ones. */
315 for (seg = segsec_names_xlat; seg->segname; seg++)
316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
317 for (sec = seg->sections; sec->mach_o_name; sec++)
318 if (strncmp (sec->mach_o_name, sectname,
319 BFD_MACH_O_SECTNAME_SIZE) == 0)
320 return sec;
321
322 return NULL;
323 }
324
325 /* If the bfd_name for this section is a 'canonical' form for which we
326 know the Mach-O data, return the segment name and the data for the
327 Mach-O equivalent. Otherwise return NULL. */
328
329 const mach_o_section_name_xlat *
330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
331 const char **segname)
332 {
333 const struct mach_o_segment_name_xlat *seg;
334 const mach_o_section_name_xlat *sec;
335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
336 *segname = NULL;
337
338 if (bfd_name[0] != '.')
339 return NULL;
340
341 /* First try any target-specific translations defined... */
342 if (bed->segsec_names_xlat)
343 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
344 for (sec = seg->sections; sec->bfd_name; sec++)
345 if (strcmp (bfd_name, sec->bfd_name) == 0)
346 {
347 *segname = seg->segname;
348 return sec;
349 }
350
351 /* ... and then the Mach-O generic ones. */
352 for (seg = segsec_names_xlat; seg->segname; seg++)
353 for (sec = seg->sections; sec->bfd_name; sec++)
354 if (strcmp (bfd_name, sec->bfd_name) == 0)
355 {
356 *segname = seg->segname;
357 return sec;
358 }
359
360 return NULL;
361 }
362
363 /* Convert Mach-O section name to BFD.
364
365 Try to use standard/canonical names, for which we have tables including
366 default flag settings - which are returned. Otherwise forge a new name
367 in the form "<segmentname>.<sectionname>" this will be prefixed with
368 LC_SEGMENT. if the segment name does not begin with an underscore.
369
370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
371 terminated if the name length is exactly 16 bytes - but must be if the name
372 length is less than 16 characters). */
373
374 void
375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
376 const char *secname, const char **name,
377 flagword *flags)
378 {
379 const mach_o_section_name_xlat *xlat;
380 char *res;
381 unsigned int len;
382 const char *pfx = "";
383
384 *name = NULL;
385 *flags = SEC_NO_FLAGS;
386
387 /* First search for a canonical name...
388 xlat will be non-null if there is an entry for segname, secname. */
389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
390 if (xlat)
391 {
392 len = strlen (xlat->bfd_name);
393 res = bfd_alloc (abfd, len + 1);
394 if (res == NULL)
395 return;
396 memcpy (res, xlat->bfd_name, len+1);
397 *name = res;
398 *flags = xlat->bfd_flags;
399 return;
400 }
401
402 /* ... else we make up a bfd name from the segment concatenated with the
403 section. */
404
405 len = 16 + 1 + 16 + 1;
406
407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
408 with an underscore. */
409 if (segname[0] != '_')
410 {
411 static const char seg_pfx[] = "LC_SEGMENT.";
412
413 pfx = seg_pfx;
414 len += sizeof (seg_pfx) - 1;
415 }
416
417 res = bfd_alloc (abfd, len);
418 if (res == NULL)
419 return;
420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
421 *name = res;
422 }
423
424 /* Convert a bfd section name to a Mach-O segment + section name.
425
426 If the name is a canonical one for which we have a Darwin match
427 return the translation table - which contains defaults for flags,
428 type, attribute and default alignment data.
429
430 Otherwise, expand the bfd_name (assumed to be in the form
431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
432
433 static const mach_o_section_name_xlat *
434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
435 asection *sect,
436 bfd_mach_o_section *section)
437 {
438 const mach_o_section_name_xlat *xlat;
439 const char *name = bfd_get_section_name (abfd, sect);
440 const char *segname;
441 const char *dot;
442 unsigned int len;
443 unsigned int seglen;
444 unsigned int seclen;
445
446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
448
449 /* See if is a canonical name ... */
450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
451 if (xlat)
452 {
453 strcpy (section->segname, segname);
454 strcpy (section->sectname, xlat->mach_o_name);
455 return xlat;
456 }
457
458 /* .. else we convert our constructed one back to Mach-O.
459 Strip LC_SEGMENT. prefix, if present. */
460 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
461 name += 11;
462
463 /* Find a dot. */
464 dot = strchr (name, '.');
465 len = strlen (name);
466
467 /* Try to split name into segment and section names. */
468 if (dot && dot != name)
469 {
470 seglen = dot - name;
471 seclen = len - (dot + 1 - name);
472
473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
474 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
475 {
476 memcpy (section->segname, name, seglen);
477 section->segname[seglen] = 0;
478 memcpy (section->sectname, dot + 1, seclen);
479 section->sectname[seclen] = 0;
480 return NULL;
481 }
482 }
483
484 /* The segment and section names are both missing - don't make them
485 into dots. */
486 if (dot && dot == name)
487 return NULL;
488
489 /* Just duplicate the name into both segment and section. */
490 if (len > 16)
491 len = 16;
492 memcpy (section->segname, name, len);
493 section->segname[len] = 0;
494 memcpy (section->sectname, name, len);
495 section->sectname[len] = 0;
496 return NULL;
497 }
498
499 /* Return the size of an entry for section SEC.
500 Must be called only for symbol pointer section and symbol stubs
501 sections. */
502
503 unsigned int
504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
505 {
506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
507 {
508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
510 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
511 case BFD_MACH_O_S_SYMBOL_STUBS:
512 return sec->reserved2;
513 default:
514 BFD_FAIL ();
515 return 0;
516 }
517 }
518
519 /* Return the number of indirect symbols for a section.
520 Must be called only for symbol pointer section and symbol stubs
521 sections. */
522
523 unsigned int
524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
525 {
526 unsigned int elsz;
527
528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
529 if (elsz == 0)
530 return 0;
531 else
532 return sec->size / elsz;
533 }
534
535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
536
537 static void
538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
539 {
540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
541
542 if (mdata->last_command != NULL)
543 mdata->last_command->next = cmd;
544 else
545 mdata->first_command = cmd;
546 mdata->last_command = cmd;
547 cmd->next = NULL;
548 }
549
550 /* Copy any private info we understand from the input symbol
551 to the output symbol. */
552
553 bfd_boolean
554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
555 asymbol *isymbol,
556 bfd *obfd ATTRIBUTE_UNUSED,
557 asymbol *osymbol)
558 {
559 bfd_mach_o_asymbol *os, *is;
560
561 os = (bfd_mach_o_asymbol *)osymbol;
562 is = (bfd_mach_o_asymbol *)isymbol;
563 os->n_type = is->n_type;
564 os->n_sect = is->n_sect;
565 os->n_desc = is->n_desc;
566 os->symbol.udata.i = is->symbol.udata.i;
567
568 return TRUE;
569 }
570
571 /* Copy any private info we understand from the input section
572 to the output section. */
573
574 bfd_boolean
575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
576 bfd *obfd, asection *osection)
577 {
578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
580
581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
582 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
583 return TRUE;
584
585 BFD_ASSERT (is != NULL && os != NULL);
586
587 os->flags = is->flags;
588 os->reserved1 = is->reserved1;
589 os->reserved2 = is->reserved2;
590 os->reserved3 = is->reserved3;
591
592 return TRUE;
593 }
594
595 /* Copy any private info we understand from the input bfd
596 to the output bfd. */
597
598 bfd_boolean
599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
600 {
601 bfd_mach_o_data_struct *imdata;
602 bfd_mach_o_data_struct *omdata;
603 bfd_mach_o_load_command *icmd;
604
605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
607 return TRUE;
608
609 BFD_ASSERT (bfd_mach_o_valid (ibfd));
610 BFD_ASSERT (bfd_mach_o_valid (obfd));
611
612 imdata = bfd_mach_o_get_data (ibfd);
613 omdata = bfd_mach_o_get_data (obfd);
614
615 /* Copy header flags. */
616 omdata->header.flags = imdata->header.flags;
617
618 /* Copy commands. */
619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
620 {
621 bfd_mach_o_load_command *ocmd;
622
623 switch (icmd->type)
624 {
625 case BFD_MACH_O_LC_LOAD_DYLIB:
626 case BFD_MACH_O_LC_LOAD_DYLINKER:
627 case BFD_MACH_O_LC_DYLD_INFO:
628 /* Command is copied. */
629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
630 if (ocmd == NULL)
631 return FALSE;
632
633 /* Copy common fields. */
634 ocmd->type = icmd->type;
635 ocmd->type_required = icmd->type_required;
636 ocmd->offset = 0;
637 ocmd->len = icmd->len;
638 break;
639
640 default:
641 /* Command is not copied. */
642 continue;
643 break;
644 }
645
646 switch (icmd->type)
647 {
648 case BFD_MACH_O_LC_LOAD_DYLIB:
649 {
650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
652
653 ody->name_offset = idy->name_offset;
654 ody->timestamp = idy->timestamp;
655 ody->current_version = idy->current_version;
656 ody->compatibility_version = idy->compatibility_version;
657 ody->name_str = idy->name_str;
658 }
659 break;
660
661 case BFD_MACH_O_LC_LOAD_DYLINKER:
662 {
663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
665
666 ody->name_offset = idy->name_offset;
667 ody->name_str = idy->name_str;
668 }
669 break;
670
671 case BFD_MACH_O_LC_DYLD_INFO:
672 {
673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
675
676 if (bfd_mach_o_read_dyld_content (ibfd, idy))
677 {
678 ody->rebase_size = idy->rebase_size;
679 ody->rebase_content = idy->rebase_content;
680
681 ody->bind_size = idy->bind_size;
682 ody->bind_content = idy->bind_content;
683
684 ody->weak_bind_size = idy->weak_bind_size;
685 ody->weak_bind_content = idy->weak_bind_content;
686
687 ody->lazy_bind_size = idy->lazy_bind_size;
688 ody->lazy_bind_content = idy->lazy_bind_content;
689
690 ody->export_size = idy->export_size;
691 ody->export_content = idy->export_content;
692 }
693 /* PR 17512L: file: 730e492d. */
694 else
695 {
696 ody->rebase_size =
697 ody->bind_size =
698 ody->weak_bind_size =
699 ody->lazy_bind_size =
700 ody->export_size = 0;
701 ody->rebase_content =
702 ody->bind_content =
703 ody->weak_bind_content =
704 ody->lazy_bind_content =
705 ody->export_content = NULL;
706 }
707 }
708 break;
709
710 default:
711 /* That command should be handled. */
712 abort ();
713 }
714
715 /* Insert command. */
716 bfd_mach_o_append_command (obfd, ocmd);
717 }
718
719 return TRUE;
720 }
721
722 /* This allows us to set up to 32 bits of flags (unless we invent some
723 fiendish scheme to subdivide). For now, we'll just set the file flags
724 without error checking - just overwrite. */
725
726 bfd_boolean
727 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
728 {
729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
730
731 if (!mdata)
732 return FALSE;
733
734 mdata->header.flags = flags;
735 return TRUE;
736 }
737
738 /* Count the total number of symbols. */
739
740 static long
741 bfd_mach_o_count_symbols (bfd *abfd)
742 {
743 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
744
745 if (mdata->symtab == NULL)
746 return 0;
747 return mdata->symtab->nsyms;
748 }
749
750 long
751 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
752 {
753 long nsyms = bfd_mach_o_count_symbols (abfd);
754
755 return ((nsyms + 1) * sizeof (asymbol *));
756 }
757
758 long
759 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
760 {
761 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
762 long nsyms = bfd_mach_o_count_symbols (abfd);
763 bfd_mach_o_symtab_command *sym = mdata->symtab;
764 unsigned long j;
765
766 if (nsyms < 0)
767 return nsyms;
768
769 if (nsyms == 0)
770 {
771 /* Do not try to read symbols if there are none. */
772 alocation[0] = NULL;
773 return 0;
774 }
775
776 if (!bfd_mach_o_read_symtab_symbols (abfd))
777 {
778 _bfd_error_handler
779 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
780 return 0;
781 }
782
783 BFD_ASSERT (sym->symbols != NULL);
784
785 for (j = 0; j < sym->nsyms; j++)
786 alocation[j] = &sym->symbols[j].symbol;
787
788 alocation[j] = NULL;
789
790 return nsyms;
791 }
792
793 /* Create synthetic symbols for indirect symbols. */
794
795 long
796 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
797 long symcount ATTRIBUTE_UNUSED,
798 asymbol **syms ATTRIBUTE_UNUSED,
799 long dynsymcount ATTRIBUTE_UNUSED,
800 asymbol **dynsyms ATTRIBUTE_UNUSED,
801 asymbol **ret)
802 {
803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
804 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
805 bfd_mach_o_symtab_command *symtab = mdata->symtab;
806 asymbol *s;
807 char * s_start;
808 char * s_end;
809 unsigned long count, i, j, n;
810 size_t size;
811 char *names;
812 char *nul_name;
813 const char stub [] = "$stub";
814
815 *ret = NULL;
816
817 /* Stop now if no symbols or no indirect symbols. */
818 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
819 || symtab == NULL || symtab->symbols == NULL)
820 return 0;
821
822 /* We need to allocate a bfd symbol for every indirect symbol and to
823 allocate the memory for its name. */
824 count = dysymtab->nindirectsyms;
825 size = count * sizeof (asymbol) + 1;
826
827 for (j = 0; j < count; j++)
828 {
829 const char * strng;
830 unsigned int isym = dysymtab->indirect_syms[j];
831
832 /* Some indirect symbols are anonymous. */
833 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
834 /* PR 17512: file: f5b8eeba. */
835 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
836 }
837
838 s_start = bfd_malloc (size);
839 s = *ret = (asymbol *) s_start;
840 if (s == NULL)
841 return -1;
842 names = (char *) (s + count);
843 nul_name = names;
844 *names++ = 0;
845 s_end = s_start + size;
846
847 n = 0;
848 for (i = 0; i < mdata->nsects; i++)
849 {
850 bfd_mach_o_section *sec = mdata->sections[i];
851 unsigned int first, last;
852 bfd_vma addr;
853 bfd_vma entry_size;
854
855 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
856 {
857 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
858 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
859 case BFD_MACH_O_S_SYMBOL_STUBS:
860 /* Only these sections have indirect symbols. */
861 first = sec->reserved1;
862 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
863 addr = sec->addr;
864 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
865
866 /* PR 17512: file: 08e15eec. */
867 if (first >= count || last >= count || first > last)
868 goto fail;
869
870 for (j = first; j < last; j++)
871 {
872 unsigned int isym = dysymtab->indirect_syms[j];
873
874 /* PR 17512: file: 04d64d9b. */
875 if (((char *) s) + sizeof (* s) > s_end)
876 goto fail;
877
878 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
879 s->section = sec->bfdsection;
880 s->value = addr - sec->addr;
881 s->udata.p = NULL;
882
883 if (isym < symtab->nsyms
884 && symtab->symbols[isym].symbol.name)
885 {
886 const char *sym = symtab->symbols[isym].symbol.name;
887 size_t len;
888
889 s->name = names;
890 len = strlen (sym);
891 /* PR 17512: file: 47dfd4d2. */
892 if (names + len >= s_end)
893 goto fail;
894 memcpy (names, sym, len);
895 names += len;
896 /* PR 17512: file: 18f340a4. */
897 if (names + sizeof (stub) >= s_end)
898 goto fail;
899 memcpy (names, stub, sizeof (stub));
900 names += sizeof (stub);
901 }
902 else
903 s->name = nul_name;
904
905 addr += entry_size;
906 s++;
907 n++;
908 }
909 break;
910 default:
911 break;
912 }
913 }
914
915 return n;
916
917 fail:
918 free (s_start);
919 * ret = NULL;
920 return -1;
921 }
922
923 void
924 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
925 asymbol *symbol,
926 symbol_info *ret)
927 {
928 bfd_symbol_info (symbol, ret);
929 }
930
931 void
932 bfd_mach_o_print_symbol (bfd *abfd,
933 void * afile,
934 asymbol *symbol,
935 bfd_print_symbol_type how)
936 {
937 FILE *file = (FILE *) afile;
938 const char *name;
939 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
940
941 switch (how)
942 {
943 case bfd_print_symbol_name:
944 fprintf (file, "%s", symbol->name);
945 break;
946 default:
947 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
948 if (asym->n_type & BFD_MACH_O_N_STAB)
949 name = bfd_get_stab_name (asym->n_type);
950 else
951 switch (asym->n_type & BFD_MACH_O_N_TYPE)
952 {
953 case BFD_MACH_O_N_UNDF:
954 if (symbol->value == 0)
955 name = "UND";
956 else
957 name = "COM";
958 break;
959 case BFD_MACH_O_N_ABS:
960 name = "ABS";
961 break;
962 case BFD_MACH_O_N_INDR:
963 name = "INDR";
964 break;
965 case BFD_MACH_O_N_PBUD:
966 name = "PBUD";
967 break;
968 case BFD_MACH_O_N_SECT:
969 name = "SECT";
970 break;
971 default:
972 name = "???";
973 break;
974 }
975 if (name == NULL)
976 name = "";
977 fprintf (file, " %02x %-6s %02x %04x",
978 asym->n_type, name, asym->n_sect, asym->n_desc);
979 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
980 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
981 fprintf (file, " [%s]", symbol->section->name);
982 fprintf (file, " %s", symbol->name);
983 }
984 }
985
986 static void
987 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
988 bfd_mach_o_cpu_subtype msubtype,
989 enum bfd_architecture *type,
990 unsigned long *subtype)
991 {
992 *subtype = bfd_arch_unknown;
993
994 switch (mtype)
995 {
996 case BFD_MACH_O_CPU_TYPE_VAX:
997 *type = bfd_arch_vax;
998 break;
999 case BFD_MACH_O_CPU_TYPE_MC680x0:
1000 *type = bfd_arch_m68k;
1001 break;
1002 case BFD_MACH_O_CPU_TYPE_I386:
1003 *type = bfd_arch_i386;
1004 *subtype = bfd_mach_i386_i386;
1005 break;
1006 case BFD_MACH_O_CPU_TYPE_X86_64:
1007 *type = bfd_arch_i386;
1008 *subtype = bfd_mach_x86_64;
1009 break;
1010 case BFD_MACH_O_CPU_TYPE_MIPS:
1011 *type = bfd_arch_mips;
1012 break;
1013 case BFD_MACH_O_CPU_TYPE_MC98000:
1014 *type = bfd_arch_m98k;
1015 break;
1016 case BFD_MACH_O_CPU_TYPE_HPPA:
1017 *type = bfd_arch_hppa;
1018 break;
1019 case BFD_MACH_O_CPU_TYPE_ARM:
1020 *type = bfd_arch_arm;
1021 switch (msubtype)
1022 {
1023 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1024 *subtype = bfd_mach_arm_4T;
1025 break;
1026 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1027 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1028 break;
1029 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1030 *subtype = bfd_mach_arm_5TE;
1031 break;
1032 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1033 *subtype = bfd_mach_arm_XScale;
1034 break;
1035 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1036 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1037 break;
1038 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1039 default:
1040 break;
1041 }
1042 break;
1043 case BFD_MACH_O_CPU_TYPE_SPARC:
1044 *type = bfd_arch_sparc;
1045 *subtype = bfd_mach_sparc;
1046 break;
1047 case BFD_MACH_O_CPU_TYPE_ALPHA:
1048 *type = bfd_arch_alpha;
1049 break;
1050 case BFD_MACH_O_CPU_TYPE_POWERPC:
1051 *type = bfd_arch_powerpc;
1052 *subtype = bfd_mach_ppc;
1053 break;
1054 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1055 *type = bfd_arch_powerpc;
1056 *subtype = bfd_mach_ppc64;
1057 break;
1058 case BFD_MACH_O_CPU_TYPE_ARM64:
1059 *type = bfd_arch_aarch64;
1060 *subtype = bfd_mach_aarch64;
1061 break;
1062 default:
1063 *type = bfd_arch_unknown;
1064 break;
1065 }
1066 }
1067
1068 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1069 number of bytes written or -1 in case of error. */
1070
1071 static int
1072 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1073 {
1074 if (len % 4 != 0)
1075 {
1076 char pad[4] = {0,0,0,0};
1077 unsigned int padlen = 4 - (len % 4);
1078
1079 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1080 return -1;
1081
1082 return padlen;
1083 }
1084 else
1085 return 0;
1086 }
1087
1088 /* Likewise, but for a command. */
1089
1090 static int
1091 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1092 {
1093 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1094
1095 if (len % align != 0)
1096 {
1097 char pad[8] = {0};
1098 unsigned int padlen = align - (len % align);
1099
1100 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1101 return -1;
1102
1103 return padlen;
1104 }
1105 else
1106 return 0;
1107 }
1108
1109 static bfd_boolean
1110 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1111 {
1112 struct mach_o_header_external raw;
1113 unsigned int size;
1114
1115 size = mach_o_wide_p (header) ?
1116 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1117
1118 bfd_h_put_32 (abfd, header->magic, raw.magic);
1119 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1120 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1121 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1122 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1123 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1124 bfd_h_put_32 (abfd, header->flags, raw.flags);
1125
1126 if (mach_o_wide_p (header))
1127 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1128
1129 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1130 || bfd_bwrite (&raw, size, abfd) != size)
1131 return FALSE;
1132
1133 return TRUE;
1134 }
1135
1136 static bfd_boolean
1137 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1138 {
1139 bfd_mach_o_thread_command *cmd = &command->command.thread;
1140 unsigned int i;
1141 struct mach_o_thread_command_external raw;
1142 unsigned int offset;
1143
1144 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1145 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1146
1147 offset = BFD_MACH_O_LC_SIZE;
1148 for (i = 0; i < cmd->nflavours; i++)
1149 {
1150 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1151 BFD_ASSERT (cmd->flavours[i].offset ==
1152 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1153
1154 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1155 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1156
1157 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1158 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1159 return FALSE;
1160
1161 offset += cmd->flavours[i].size + sizeof (raw);
1162 }
1163
1164 return TRUE;
1165 }
1166
1167 static bfd_boolean
1168 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1169 {
1170 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1171 struct mach_o_str_command_external raw;
1172 unsigned int namelen;
1173
1174 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1175
1176 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1177 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1178 return FALSE;
1179
1180 namelen = strlen (cmd->name_str) + 1;
1181 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1182 return FALSE;
1183
1184 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1185 return FALSE;
1186
1187 return TRUE;
1188 }
1189
1190 static bfd_boolean
1191 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1192 {
1193 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1194 struct mach_o_dylib_command_external raw;
1195 unsigned int namelen;
1196
1197 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1198 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1199 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1200 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1201
1202 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1203 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1204 return FALSE;
1205
1206 namelen = strlen (cmd->name_str) + 1;
1207 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1208 return FALSE;
1209
1210 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1211 return FALSE;
1212
1213 return TRUE;
1214 }
1215
1216 static bfd_boolean
1217 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1218 {
1219 bfd_mach_o_main_command *cmd = &command->command.main;
1220 struct mach_o_entry_point_command_external raw;
1221
1222 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1223 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1224
1225 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1226 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1227 return FALSE;
1228
1229 return TRUE;
1230 }
1231
1232 static bfd_boolean
1233 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1234 {
1235 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1236 struct mach_o_dyld_info_command_external raw;
1237
1238 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1239 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1240 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1241 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1242 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1243 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1244 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1245 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1246 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1247 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1248
1249 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1250 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1251 return FALSE;
1252
1253 if (cmd->rebase_size != 0)
1254 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1255 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1256 cmd->rebase_size))
1257 return FALSE;
1258
1259 if (cmd->bind_size != 0)
1260 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1261 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1262 cmd->bind_size))
1263 return FALSE;
1264
1265 if (cmd->weak_bind_size != 0)
1266 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1267 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1268 cmd->weak_bind_size))
1269 return FALSE;
1270
1271 if (cmd->lazy_bind_size != 0)
1272 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1273 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1274 cmd->lazy_bind_size))
1275 return FALSE;
1276
1277 if (cmd->export_size != 0)
1278 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1279 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1280 cmd->export_size))
1281 return FALSE;
1282
1283 return TRUE;
1284 }
1285
1286 long
1287 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1288 asection *asect)
1289 {
1290 return (asect->reloc_count + 1) * sizeof (arelent *);
1291 }
1292
1293 /* In addition to the need to byte-swap the symbol number, the bit positions
1294 of the fields in the relocation information vary per target endian-ness. */
1295
1296 void
1297 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1298 unsigned char *fields)
1299 {
1300 unsigned char info = fields[3];
1301
1302 if (bfd_big_endian (abfd))
1303 {
1304 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1305 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1306 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1307 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1308 & BFD_MACH_O_LENGTH_MASK;
1309 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1310 }
1311 else
1312 {
1313 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1314 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1315 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1316 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1317 & BFD_MACH_O_LENGTH_MASK;
1318 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1319 }
1320 }
1321
1322 /* Set syms_ptr_ptr and addend of RES. */
1323
1324 bfd_boolean
1325 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1326 bfd_mach_o_reloc_info *reloc,
1327 arelent *res, asymbol **syms)
1328 {
1329 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1330 unsigned int num;
1331 asymbol **sym;
1332
1333 /* Non-scattered relocation. */
1334 reloc->r_scattered = 0;
1335 res->addend = 0;
1336
1337 num = reloc->r_value;
1338
1339 if (reloc->r_extern)
1340 {
1341 /* PR 17512: file: 8396-1185-0.004. */
1342 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1343 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1344 else if (syms == NULL)
1345 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1346 else
1347 /* An external symbol number. */
1348 sym = syms + num;
1349 }
1350 else if (num == 0x00ffffff || num == 0)
1351 {
1352 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1353 is generic code, we don't know wether this is really a PAIR.
1354 This value is almost certainly not a valid section number, hence
1355 this specific case to avoid an assertion failure.
1356 Target specific swap_reloc_in routine should adjust that. */
1357 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1358 }
1359 else
1360 {
1361 /* PR 17512: file: 006-2964-0.004. */
1362 if (num > mdata->nsects)
1363 return FALSE;
1364
1365 /* A section number. */
1366 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1367 /* For a symbol defined in section S, the addend (stored in the
1368 binary) contains the address of the section. To comply with
1369 bfd convention, subtract the section address.
1370 Use the address from the header, so that the user can modify
1371 the vma of the section. */
1372 res->addend = -mdata->sections[num - 1]->addr;
1373 }
1374
1375 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1376 in the lower 16bits of the address value. So we have to find the
1377 'symbol' from the preceding reloc. We do this even though the
1378 section symbol is probably not needed here, because NULL symbol
1379 values cause an assert in generic BFD code. This must be done in
1380 the PPC swap_reloc_in routine. */
1381 res->sym_ptr_ptr = sym;
1382
1383 return TRUE;
1384 }
1385
1386 /* Do most of the work for canonicalize_relocs on RAW: create internal
1387 representation RELOC and set most fields of RES using symbol table SYMS.
1388 Each target still has to set the howto of RES and possibly adjust other
1389 fields.
1390 Previously the Mach-O hook point was simply swap_in, but some targets
1391 (like arm64) don't follow the generic rules (symnum is a value for the
1392 non-scattered relocation ADDEND). */
1393
1394 bfd_boolean
1395 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1396 struct mach_o_reloc_info_external *raw,
1397 bfd_mach_o_reloc_info *reloc,
1398 arelent *res, asymbol **syms)
1399 {
1400 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1401 bfd_vma addr;
1402
1403 addr = bfd_get_32 (abfd, raw->r_address);
1404 res->sym_ptr_ptr = NULL;
1405 res->addend = 0;
1406
1407 if (addr & BFD_MACH_O_SR_SCATTERED)
1408 {
1409 unsigned int j;
1410 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1411
1412 /* Scattered relocation, can't be extern. */
1413 reloc->r_scattered = 1;
1414 reloc->r_extern = 0;
1415
1416 /* Extract section and offset from r_value (symnum). */
1417 reloc->r_value = symnum;
1418 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1419 end of the data for the section (e.g. in a calculation of section
1420 data length). At present, the symbol will end up associated with
1421 the following section or, if it falls within alignment padding, as
1422 null - which will assert later. */
1423 for (j = 0; j < mdata->nsects; j++)
1424 {
1425 bfd_mach_o_section *sect = mdata->sections[j];
1426 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1427 {
1428 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1429 res->addend = symnum - sect->addr;
1430 break;
1431 }
1432 }
1433
1434 /* Extract the info and address fields from r_address. */
1435 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1436 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1437 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1438 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1439 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1440 }
1441 else
1442 {
1443 /* Non-scattered relocation. */
1444 reloc->r_scattered = 0;
1445 reloc->r_address = addr;
1446 res->address = addr;
1447
1448 /* The value and info fields have to be extracted dependent on target
1449 endian-ness. */
1450 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1451
1452 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1453 res, syms))
1454 return FALSE;
1455 }
1456
1457 /* We have set up a reloc with all the information present, so the swapper
1458 can modify address, value and addend fields, if necessary, to convey
1459 information in the generic BFD reloc that is mach-o specific. */
1460
1461 return TRUE;
1462 }
1463
1464 static int
1465 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1466 unsigned long count,
1467 arelent *res, asymbol **syms)
1468 {
1469 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1470 unsigned long i;
1471 struct mach_o_reloc_info_external *native_relocs;
1472 bfd_size_type native_size;
1473
1474 /* Allocate and read relocs. */
1475 native_size = count * BFD_MACH_O_RELENT_SIZE;
1476
1477 /* PR 17512: file: 09477b57. */
1478 if (native_size < count)
1479 return -1;
1480
1481 native_relocs =
1482 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1483 if (native_relocs == NULL)
1484 return -1;
1485
1486 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1487 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1488 goto err;
1489
1490 for (i = 0; i < count; i++)
1491 {
1492 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1493 &res[i], syms, res))
1494 goto err;
1495 }
1496 free (native_relocs);
1497 return i;
1498 err:
1499 free (native_relocs);
1500 return -1;
1501 }
1502
1503 long
1504 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1505 arelent **rels, asymbol **syms)
1506 {
1507 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1508 unsigned long i;
1509 arelent *res;
1510
1511 if (asect->reloc_count == 0)
1512 return 0;
1513
1514 /* No need to go further if we don't know how to read relocs. */
1515 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1516 return 0;
1517
1518 if (asect->relocation == NULL)
1519 {
1520 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count)
1521 return -1;
1522 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1523 if (res == NULL)
1524 return -1;
1525
1526 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1527 asect->reloc_count, res, syms) < 0)
1528 {
1529 free (res);
1530 return -1;
1531 }
1532 asect->relocation = res;
1533 }
1534
1535 res = asect->relocation;
1536 for (i = 0; i < asect->reloc_count; i++)
1537 rels[i] = &res[i];
1538 rels[i] = NULL;
1539
1540 return i;
1541 }
1542
1543 long
1544 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1545 {
1546 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1547
1548 if (mdata->dysymtab == NULL)
1549 return 1;
1550 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1551 * sizeof (arelent *);
1552 }
1553
1554 long
1555 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1556 struct bfd_symbol **syms)
1557 {
1558 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1559 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1560 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1561 unsigned long i;
1562 arelent *res;
1563
1564 if (dysymtab == NULL)
1565 return 0;
1566 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1567 return 0;
1568
1569 /* No need to go further if we don't know how to read relocs. */
1570 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1571 return 0;
1572
1573 if (mdata->dyn_reloc_cache == NULL)
1574 {
1575 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent)
1576 < (dysymtab->nextrel + dysymtab->nlocrel))
1577 return -1;
1578
1579 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1580 * sizeof (arelent));
1581 if (res == NULL)
1582 return -1;
1583
1584 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1585 dysymtab->nextrel, res, syms) < 0)
1586 {
1587 free (res);
1588 return -1;
1589 }
1590
1591 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1592 dysymtab->nlocrel,
1593 res + dysymtab->nextrel, syms) < 0)
1594 {
1595 free (res);
1596 return -1;
1597 }
1598
1599 mdata->dyn_reloc_cache = res;
1600 }
1601
1602 res = mdata->dyn_reloc_cache;
1603 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1604 rels[i] = &res[i];
1605 rels[i] = NULL;
1606 return i;
1607 }
1608
1609 /* In addition to the need to byte-swap the symbol number, the bit positions
1610 of the fields in the relocation information vary per target endian-ness. */
1611
1612 static void
1613 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1614 bfd_mach_o_reloc_info *rel)
1615 {
1616 unsigned char info = 0;
1617
1618 BFD_ASSERT (rel->r_type <= 15);
1619 BFD_ASSERT (rel->r_length <= 3);
1620
1621 if (bfd_big_endian (abfd))
1622 {
1623 fields[0] = (rel->r_value >> 16) & 0xff;
1624 fields[1] = (rel->r_value >> 8) & 0xff;
1625 fields[2] = rel->r_value & 0xff;
1626 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1627 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1628 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1629 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1630 }
1631 else
1632 {
1633 fields[2] = (rel->r_value >> 16) & 0xff;
1634 fields[1] = (rel->r_value >> 8) & 0xff;
1635 fields[0] = rel->r_value & 0xff;
1636 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1637 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1638 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1639 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1640 }
1641 fields[3] = info;
1642 }
1643
1644 static bfd_boolean
1645 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1646 {
1647 unsigned int i;
1648 arelent **entries;
1649 asection *sec;
1650 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1651
1652 sec = section->bfdsection;
1653 if (sec->reloc_count == 0)
1654 return TRUE;
1655
1656 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1657 return TRUE;
1658
1659 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1660 return FALSE;
1661
1662 /* Convert and write. */
1663 entries = section->bfdsection->orelocation;
1664 for (i = 0; i < section->nreloc; i++)
1665 {
1666 arelent *rel = entries[i];
1667 struct mach_o_reloc_info_external raw;
1668 bfd_mach_o_reloc_info info, *pinfo = &info;
1669
1670 /* Convert relocation to an intermediate representation. */
1671 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1672 return FALSE;
1673
1674 /* Lower the relocation info. */
1675 if (pinfo->r_scattered)
1676 {
1677 unsigned long v;
1678
1679 v = BFD_MACH_O_SR_SCATTERED
1680 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1681 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1682 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1683 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1684 /* Note: scattered relocs have field in reverse order... */
1685 bfd_put_32 (abfd, v, raw.r_address);
1686 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1687 }
1688 else
1689 {
1690 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1691 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1692 pinfo);
1693 }
1694
1695 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1696 != BFD_MACH_O_RELENT_SIZE)
1697 return FALSE;
1698 }
1699 return TRUE;
1700 }
1701
1702 static bfd_boolean
1703 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1704 {
1705 struct mach_o_section_32_external raw;
1706
1707 memcpy (raw.sectname, section->sectname, 16);
1708 memcpy (raw.segname, section->segname, 16);
1709 bfd_h_put_32 (abfd, section->addr, raw.addr);
1710 bfd_h_put_32 (abfd, section->size, raw.size);
1711 bfd_h_put_32 (abfd, section->offset, raw.offset);
1712 bfd_h_put_32 (abfd, section->align, raw.align);
1713 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1714 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1715 bfd_h_put_32 (abfd, section->flags, raw.flags);
1716 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1717 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1718
1719 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1720 != BFD_MACH_O_SECTION_SIZE)
1721 return FALSE;
1722
1723 return TRUE;
1724 }
1725
1726 static bfd_boolean
1727 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1728 {
1729 struct mach_o_section_64_external raw;
1730
1731 memcpy (raw.sectname, section->sectname, 16);
1732 memcpy (raw.segname, section->segname, 16);
1733 bfd_h_put_64 (abfd, section->addr, raw.addr);
1734 bfd_h_put_64 (abfd, section->size, raw.size);
1735 bfd_h_put_32 (abfd, section->offset, raw.offset);
1736 bfd_h_put_32 (abfd, section->align, raw.align);
1737 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1738 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1739 bfd_h_put_32 (abfd, section->flags, raw.flags);
1740 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1741 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1742 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1743
1744 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1745 != BFD_MACH_O_SECTION_64_SIZE)
1746 return FALSE;
1747
1748 return TRUE;
1749 }
1750
1751 static bfd_boolean
1752 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1753 {
1754 struct mach_o_segment_command_32_external raw;
1755 bfd_mach_o_segment_command *seg = &command->command.segment;
1756 bfd_mach_o_section *sec;
1757
1758 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1759
1760 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1761 if (!bfd_mach_o_write_relocs (abfd, sec))
1762 return FALSE;
1763
1764 memcpy (raw.segname, seg->segname, 16);
1765 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1766 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1767 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1768 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1769 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1770 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1771 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1772 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1773
1774 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1775 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1776 return FALSE;
1777
1778 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1779 if (!bfd_mach_o_write_section_32 (abfd, sec))
1780 return FALSE;
1781
1782 return TRUE;
1783 }
1784
1785 static bfd_boolean
1786 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1787 {
1788 struct mach_o_segment_command_64_external raw;
1789 bfd_mach_o_segment_command *seg = &command->command.segment;
1790 bfd_mach_o_section *sec;
1791
1792 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1793
1794 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1795 if (!bfd_mach_o_write_relocs (abfd, sec))
1796 return FALSE;
1797
1798 memcpy (raw.segname, seg->segname, 16);
1799 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1800 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1801 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1802 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1803 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1804 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1805 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1806 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1807
1808 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1809 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1810 return FALSE;
1811
1812 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1813 if (!bfd_mach_o_write_section_64 (abfd, sec))
1814 return FALSE;
1815
1816 return TRUE;
1817 }
1818
1819 static bfd_boolean
1820 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1821 {
1822 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1823 unsigned long i;
1824 unsigned int wide = bfd_mach_o_wide_p (abfd);
1825 struct bfd_strtab_hash *strtab;
1826 asymbol **symbols = bfd_get_outsymbols (abfd);
1827 int padlen;
1828
1829 /* Write the symbols first. */
1830 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1831 return FALSE;
1832
1833 strtab = _bfd_stringtab_init ();
1834 if (strtab == NULL)
1835 return FALSE;
1836
1837 if (sym->nsyms > 0)
1838 /* Although we don't strictly need to do this, for compatibility with
1839 Darwin system tools, actually output an empty string for the index
1840 0 entry. */
1841 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1842
1843 for (i = 0; i < sym->nsyms; i++)
1844 {
1845 bfd_size_type str_index;
1846 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1847
1848 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1849 /* An index of 0 always means the empty string. */
1850 str_index = 0;
1851 else
1852 {
1853 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1854
1855 if (str_index == (bfd_size_type) -1)
1856 goto err;
1857 }
1858
1859 if (wide)
1860 {
1861 struct mach_o_nlist_64_external raw;
1862
1863 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1864 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1865 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1866 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1867 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1868 raw.n_value);
1869
1870 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1871 goto err;
1872 }
1873 else
1874 {
1875 struct mach_o_nlist_external raw;
1876
1877 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1878 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1879 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1880 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1881 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1882 raw.n_value);
1883
1884 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1885 goto err;
1886 }
1887 }
1888 sym->strsize = _bfd_stringtab_size (strtab);
1889 sym->stroff = mdata->filelen;
1890 mdata->filelen += sym->strsize;
1891
1892 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
1893 goto err;
1894
1895 if (!_bfd_stringtab_emit (abfd, strtab))
1896 goto err;
1897
1898 /* Pad string table. */
1899 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
1900 if (padlen < 0)
1901 return FALSE;
1902 mdata->filelen += padlen;
1903 sym->strsize += padlen;
1904
1905 return TRUE;
1906
1907 err:
1908 _bfd_stringtab_free (strtab);
1909 sym->strsize = 0;
1910 return FALSE;
1911 }
1912
1913 static bfd_boolean
1914 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1915 {
1916 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1917 struct mach_o_symtab_command_external raw;
1918
1919 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1920
1921 /* The command. */
1922 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1923 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1924 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1925 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1926
1927 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1928 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1929 return FALSE;
1930
1931 return TRUE;
1932 }
1933
1934 /* Count the number of indirect symbols in the image.
1935 Requires that the sections are in their final order. */
1936
1937 static unsigned int
1938 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
1939 {
1940 unsigned int i;
1941 unsigned int nisyms = 0;
1942
1943 for (i = 0; i < mdata->nsects; ++i)
1944 {
1945 bfd_mach_o_section *sec = mdata->sections[i];
1946
1947 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
1948 {
1949 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
1950 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
1951 case BFD_MACH_O_S_SYMBOL_STUBS:
1952 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
1953 break;
1954 default:
1955 break;
1956 }
1957 }
1958 return nisyms;
1959 }
1960
1961 /* Create the dysymtab. */
1962
1963 static bfd_boolean
1964 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
1965 {
1966 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1967
1968 /* TODO:
1969 We are not going to try and fill these in yet and, moreover, we are
1970 going to bail if they are already set. */
1971 if (cmd->nmodtab != 0
1972 || cmd->ntoc != 0
1973 || cmd->nextrefsyms != 0)
1974 {
1975 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
1976 " implemented for dysymtab commands."));
1977 return FALSE;
1978 }
1979
1980 cmd->ilocalsym = 0;
1981
1982 if (bfd_get_symcount (abfd) > 0)
1983 {
1984 asymbol **symbols = bfd_get_outsymbols (abfd);
1985 unsigned long i;
1986
1987 /* Count the number of each kind of symbol. */
1988 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1989 {
1990 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1991 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
1992 break;
1993 }
1994 cmd->nlocalsym = i;
1995 cmd->iextdefsym = i;
1996 for (; i < bfd_get_symcount (abfd); ++i)
1997 {
1998 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1999 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2000 break;
2001 }
2002 cmd->nextdefsym = i - cmd->nlocalsym;
2003 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2004 cmd->nundefsym = bfd_get_symcount (abfd)
2005 - cmd->nlocalsym
2006 - cmd->nextdefsym;
2007 }
2008 else
2009 {
2010 cmd->nlocalsym = 0;
2011 cmd->iextdefsym = 0;
2012 cmd->nextdefsym = 0;
2013 cmd->iundefsym = 0;
2014 cmd->nundefsym = 0;
2015 }
2016
2017 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2018 if (cmd->nindirectsyms > 0)
2019 {
2020 unsigned i;
2021 unsigned n;
2022
2023 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2024 cmd->indirectsymoff = mdata->filelen;
2025 mdata->filelen += cmd->nindirectsyms * 4;
2026
2027 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms)
2028 return FALSE;
2029 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4);
2030 if (cmd->indirect_syms == NULL)
2031 return FALSE;
2032
2033 n = 0;
2034 for (i = 0; i < mdata->nsects; ++i)
2035 {
2036 bfd_mach_o_section *sec = mdata->sections[i];
2037
2038 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2039 {
2040 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2041 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2042 case BFD_MACH_O_S_SYMBOL_STUBS:
2043 {
2044 unsigned j, num;
2045 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2046
2047 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2048 if (isyms == NULL || num == 0)
2049 break;
2050 /* Record the starting index in the reserved1 field. */
2051 sec->reserved1 = n;
2052 for (j = 0; j < num; j++, n++)
2053 {
2054 if (isyms[j] == NULL)
2055 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2056 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2057 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2058 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2059 | BFD_MACH_O_INDIRECT_SYM_ABS;
2060 else
2061 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2062 }
2063 }
2064 break;
2065 default:
2066 break;
2067 }
2068 }
2069 }
2070
2071 return TRUE;
2072 }
2073
2074 /* Write a dysymtab command.
2075 TODO: Possibly coalesce writes of smaller objects. */
2076
2077 static bfd_boolean
2078 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2079 {
2080 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2081
2082 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2083
2084 if (cmd->nmodtab != 0)
2085 {
2086 unsigned int i;
2087
2088 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2089 return FALSE;
2090
2091 for (i = 0; i < cmd->nmodtab; i++)
2092 {
2093 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2094 unsigned int iinit;
2095 unsigned int ninit;
2096
2097 iinit = module->iinit & 0xffff;
2098 iinit |= ((module->iterm & 0xffff) << 16);
2099
2100 ninit = module->ninit & 0xffff;
2101 ninit |= ((module->nterm & 0xffff) << 16);
2102
2103 if (bfd_mach_o_wide_p (abfd))
2104 {
2105 struct mach_o_dylib_module_64_external w;
2106
2107 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2108 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2109 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2110 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2111 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2112 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2113 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2114 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2115 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2116 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2117 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2118 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2119 &w.objc_module_info_addr);
2120 bfd_h_put_32 (abfd, module->objc_module_info_size,
2121 &w.objc_module_info_size);
2122
2123 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2124 return FALSE;
2125 }
2126 else
2127 {
2128 struct mach_o_dylib_module_external n;
2129
2130 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2131 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2132 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2133 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2134 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2135 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2136 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2137 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2138 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2139 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2140 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2141 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2142 &n.objc_module_info_addr);
2143 bfd_h_put_32 (abfd, module->objc_module_info_size,
2144 &n.objc_module_info_size);
2145
2146 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2147 return FALSE;
2148 }
2149 }
2150 }
2151
2152 if (cmd->ntoc != 0)
2153 {
2154 unsigned int i;
2155
2156 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2157 return FALSE;
2158
2159 for (i = 0; i < cmd->ntoc; i++)
2160 {
2161 struct mach_o_dylib_table_of_contents_external raw;
2162 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2163
2164 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2165 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2166
2167 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2168 return FALSE;
2169 }
2170 }
2171
2172 if (cmd->nindirectsyms > 0)
2173 {
2174 unsigned int i;
2175
2176 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2177 return FALSE;
2178
2179 for (i = 0; i < cmd->nindirectsyms; ++i)
2180 {
2181 unsigned char raw[4];
2182
2183 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2184 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2185 return FALSE;
2186 }
2187 }
2188
2189 if (cmd->nextrefsyms != 0)
2190 {
2191 unsigned int i;
2192
2193 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2194 return FALSE;
2195
2196 for (i = 0; i < cmd->nextrefsyms; i++)
2197 {
2198 unsigned long v;
2199 unsigned char raw[4];
2200 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2201
2202 /* Fields isym and flags are written as bit-fields, thus we need
2203 a specific processing for endianness. */
2204
2205 if (bfd_big_endian (abfd))
2206 {
2207 v = ((ref->isym & 0xffffff) << 8);
2208 v |= ref->flags & 0xff;
2209 }
2210 else
2211 {
2212 v = ref->isym & 0xffffff;
2213 v |= ((ref->flags & 0xff) << 24);
2214 }
2215
2216 bfd_h_put_32 (abfd, v, raw);
2217 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2218 return FALSE;
2219 }
2220 }
2221
2222 /* The command. */
2223 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2224 return FALSE;
2225 else
2226 {
2227 struct mach_o_dysymtab_command_external raw;
2228
2229 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2230 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2231 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2232 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2233 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2234 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2235 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2236 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2237 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2238 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2239 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2240 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2241 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2242 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2243 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2244 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2245 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2246 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2247
2248 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2249 return FALSE;
2250 }
2251
2252 return TRUE;
2253 }
2254
2255 static unsigned
2256 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2257 {
2258 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2259
2260 /* Just leave debug symbols where they are (pretend they are local, and
2261 then they will just be sorted on position). */
2262 if (s->n_type & BFD_MACH_O_N_STAB)
2263 return 0;
2264
2265 /* Local (we should never see an undefined local AFAICT). */
2266 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2267 return 0;
2268
2269 /* Common symbols look like undefined externs. */
2270 if (mtyp == BFD_MACH_O_N_UNDF)
2271 return 2;
2272
2273 /* A defined non-local, non-debug symbol. */
2274 return 1;
2275 }
2276
2277 static int
2278 bfd_mach_o_cf_symbols (const void *a, const void *b)
2279 {
2280 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2281 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2282 unsigned int soa, sob;
2283
2284 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2285 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2286 if (soa < sob)
2287 return -1;
2288
2289 if (soa > sob)
2290 return 1;
2291
2292 /* If it's local or stab, just preserve the input order. */
2293 if (soa == 0)
2294 {
2295 if (sa->symbol.udata.i < sb->symbol.udata.i)
2296 return -1;
2297 if (sa->symbol.udata.i > sb->symbol.udata.i)
2298 return 1;
2299
2300 /* This is probably an error. */
2301 return 0;
2302 }
2303
2304 /* The second sort key is name. */
2305 return strcmp (sa->symbol.name, sb->symbol.name);
2306 }
2307
2308 /* Process the symbols.
2309
2310 This should be OK for single-module files - but it is not likely to work
2311 for multi-module shared libraries.
2312
2313 (a) If the application has not filled in the relevant mach-o fields, make
2314 an estimate.
2315
2316 (b) Order them, like this:
2317 ( i) local.
2318 (unsorted)
2319 ( ii) external defined
2320 (by name)
2321 (iii) external undefined/common
2322 (by name)
2323 ( iv) common
2324 (by name)
2325 */
2326
2327 static bfd_boolean
2328 bfd_mach_o_mangle_symbols (bfd *abfd)
2329 {
2330 unsigned long i;
2331 asymbol **symbols = bfd_get_outsymbols (abfd);
2332
2333 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2334 return TRUE;
2335
2336 for (i = 0; i < bfd_get_symcount (abfd); i++)
2337 {
2338 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2339
2340 /* We use this value, which is out-of-range as a symbol index, to signal
2341 that the mach-o-specific data are not filled in and need to be created
2342 from the bfd values. It is much preferable for the application to do
2343 this, since more meaningful diagnostics can be made that way. */
2344
2345 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2346 {
2347 /* No symbol information has been set - therefore determine
2348 it from the bfd symbol flags/info. */
2349 if (s->symbol.section == bfd_abs_section_ptr)
2350 s->n_type = BFD_MACH_O_N_ABS;
2351 else if (s->symbol.section == bfd_und_section_ptr)
2352 {
2353 s->n_type = BFD_MACH_O_N_UNDF;
2354 if (s->symbol.flags & BSF_WEAK)
2355 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2356 /* mach-o automatically makes undefined symbols extern. */
2357 s->n_type |= BFD_MACH_O_N_EXT;
2358 s->symbol.flags |= BSF_GLOBAL;
2359 }
2360 else if (s->symbol.section == bfd_com_section_ptr)
2361 {
2362 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2363 s->symbol.flags |= BSF_GLOBAL;
2364 }
2365 else
2366 s->n_type = BFD_MACH_O_N_SECT;
2367
2368 if (s->symbol.flags & BSF_GLOBAL)
2369 s->n_type |= BFD_MACH_O_N_EXT;
2370 }
2371
2372 /* Put the section index in, where required. */
2373 if ((s->symbol.section != bfd_abs_section_ptr
2374 && s->symbol.section != bfd_und_section_ptr
2375 && s->symbol.section != bfd_com_section_ptr)
2376 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2377 && s->symbol.name == NULL))
2378 s->n_sect = s->symbol.section->output_section->target_index;
2379
2380 /* Number to preserve order for local and debug syms. */
2381 s->symbol.udata.i = i;
2382 }
2383
2384 /* Sort the symbols. */
2385 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2386 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2387
2388 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2389 {
2390 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2391 s->symbol.udata.i = i; /* renumber. */
2392 }
2393
2394 return TRUE;
2395 }
2396
2397 /* We build a flat table of sections, which can be re-ordered if necessary.
2398 Fill in the section number and other mach-o-specific data. */
2399
2400 static bfd_boolean
2401 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2402 {
2403 asection *sec;
2404 unsigned target_index;
2405 unsigned nsect;
2406
2407 nsect = bfd_count_sections (abfd);
2408
2409 /* Don't do it if it's already set - assume the application knows what it's
2410 doing. */
2411 if (mdata->nsects == nsect
2412 && (mdata->nsects == 0 || mdata->sections != NULL))
2413 return TRUE;
2414
2415 /* We need to check that this can be done... */
2416 if (nsect > 255)
2417 {
2418 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2419 " maximum is 255,\n"), nsect);
2420 return FALSE;
2421 }
2422
2423 mdata->nsects = nsect;
2424 mdata->sections = bfd_alloc2 (abfd,
2425 mdata->nsects, sizeof (bfd_mach_o_section *));
2426 if (mdata->sections == NULL)
2427 return FALSE;
2428
2429 /* Create Mach-O sections.
2430 Section type, attribute and align should have been set when the
2431 section was created - either read in or specified. */
2432 target_index = 0;
2433 for (sec = abfd->sections; sec; sec = sec->next)
2434 {
2435 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
2436 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2437
2438 mdata->sections[target_index] = msect;
2439
2440 msect->addr = bfd_get_section_vma (abfd, sec);
2441 msect->size = bfd_get_section_size (sec);
2442
2443 /* Use the largest alignment set, in case it was bumped after the
2444 section was created. */
2445 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2446
2447 msect->offset = 0;
2448 sec->target_index = ++target_index;
2449 }
2450
2451 return TRUE;
2452 }
2453
2454 bfd_boolean
2455 bfd_mach_o_write_contents (bfd *abfd)
2456 {
2457 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2458 bfd_mach_o_load_command *cmd;
2459 bfd_mach_o_symtab_command *symtab = NULL;
2460 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2461 bfd_mach_o_segment_command *linkedit = NULL;
2462
2463 /* Make the commands, if not already present. */
2464 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2465 return FALSE;
2466 abfd->output_has_begun = TRUE;
2467
2468 /* Write the header. */
2469 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2470 return FALSE;
2471
2472 /* First pass: allocate the linkedit segment. */
2473 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2474 switch (cmd->type)
2475 {
2476 case BFD_MACH_O_LC_SEGMENT_64:
2477 case BFD_MACH_O_LC_SEGMENT:
2478 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2479 linkedit = &cmd->command.segment;
2480 break;
2481 case BFD_MACH_O_LC_SYMTAB:
2482 symtab = &cmd->command.symtab;
2483 break;
2484 case BFD_MACH_O_LC_DYSYMTAB:
2485 dysymtab = &cmd->command.dysymtab;
2486 break;
2487 case BFD_MACH_O_LC_DYLD_INFO:
2488 {
2489 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2490
2491 if (di->rebase_size != 0)
2492 {
2493 di->rebase_off = mdata->filelen;
2494 mdata->filelen += di->rebase_size;
2495 }
2496 if (di->bind_size != 0)
2497 {
2498 di->bind_off = mdata->filelen;
2499 mdata->filelen += di->bind_size;
2500 }
2501 if (di->weak_bind_size != 0)
2502 {
2503 di->weak_bind_off = mdata->filelen;
2504 mdata->filelen += di->weak_bind_size;
2505 }
2506 if (di->lazy_bind_size != 0)
2507 {
2508 di->lazy_bind_off = mdata->filelen;
2509 mdata->filelen += di->lazy_bind_size;
2510 }
2511 if (di->export_size != 0)
2512 {
2513 di->export_off = mdata->filelen;
2514 mdata->filelen += di->export_size;
2515 }
2516 }
2517 break;
2518 case BFD_MACH_O_LC_LOAD_DYLIB:
2519 case BFD_MACH_O_LC_LOAD_DYLINKER:
2520 case BFD_MACH_O_LC_MAIN:
2521 /* Nothing to do. */
2522 break;
2523 default:
2524 _bfd_error_handler
2525 (_("unable to allocate data for load command %#x"),
2526 cmd->type);
2527 break;
2528 }
2529
2530 /* Specially handle symtab and dysymtab. */
2531
2532 /* Pre-allocate the symbol table (but not the string table). The reason
2533 is that the dysymtab is after the symbol table but before the string
2534 table (required by the native strip tool). */
2535 if (symtab != NULL)
2536 {
2537 unsigned int symlen;
2538 unsigned int wide = bfd_mach_o_wide_p (abfd);
2539
2540 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2541
2542 /* Align for symbols. */
2543 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2544 symtab->symoff = mdata->filelen;
2545
2546 symtab->nsyms = bfd_get_symcount (abfd);
2547 mdata->filelen += symtab->nsyms * symlen;
2548 }
2549
2550 /* Build the dysymtab. */
2551 if (dysymtab != NULL)
2552 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2553 return FALSE;
2554
2555 /* Write symtab and strtab. */
2556 if (symtab != NULL)
2557 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2558 return FALSE;
2559
2560 /* Adjust linkedit size. */
2561 if (linkedit != NULL)
2562 {
2563 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2564
2565 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2566 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2567 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2568
2569 linkedit->initprot = BFD_MACH_O_PROT_READ;
2570 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2571 | BFD_MACH_O_PROT_EXECUTE;
2572 }
2573
2574 /* Second pass: write commands. */
2575 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2576 {
2577 struct mach_o_load_command_external raw;
2578 unsigned long typeflag;
2579
2580 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2581
2582 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2583 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2584
2585 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2586 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2587 return FALSE;
2588
2589 switch (cmd->type)
2590 {
2591 case BFD_MACH_O_LC_SEGMENT:
2592 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2593 return FALSE;
2594 break;
2595 case BFD_MACH_O_LC_SEGMENT_64:
2596 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2597 return FALSE;
2598 break;
2599 case BFD_MACH_O_LC_SYMTAB:
2600 if (!bfd_mach_o_write_symtab (abfd, cmd))
2601 return FALSE;
2602 break;
2603 case BFD_MACH_O_LC_DYSYMTAB:
2604 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2605 return FALSE;
2606 break;
2607 case BFD_MACH_O_LC_THREAD:
2608 case BFD_MACH_O_LC_UNIXTHREAD:
2609 if (!bfd_mach_o_write_thread (abfd, cmd))
2610 return FALSE;
2611 break;
2612 case BFD_MACH_O_LC_LOAD_DYLIB:
2613 if (!bfd_mach_o_write_dylib (abfd, cmd))
2614 return FALSE;
2615 break;
2616 case BFD_MACH_O_LC_LOAD_DYLINKER:
2617 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2618 return FALSE;
2619 break;
2620 case BFD_MACH_O_LC_MAIN:
2621 if (!bfd_mach_o_write_main (abfd, cmd))
2622 return FALSE;
2623 break;
2624 case BFD_MACH_O_LC_DYLD_INFO:
2625 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2626 return FALSE;
2627 break;
2628 default:
2629 _bfd_error_handler
2630 (_("unable to write unknown load command %#x"),
2631 cmd->type);
2632 return FALSE;
2633 }
2634 }
2635
2636 return TRUE;
2637 }
2638
2639 static void
2640 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2641 bfd_mach_o_section *s)
2642 {
2643 if (seg->sect_head == NULL)
2644 seg->sect_head = s;
2645 else
2646 seg->sect_tail->next = s;
2647 seg->sect_tail = s;
2648 }
2649
2650 /* Create section Mach-O flags from BFD flags. */
2651
2652 static void
2653 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2654 asection *sec)
2655 {
2656 flagword bfd_flags;
2657 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2658
2659 /* Create default flags. */
2660 bfd_flags = bfd_get_section_flags (abfd, sec);
2661 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2662 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2663 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2664 | BFD_MACH_O_S_REGULAR;
2665 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2666 s->flags = BFD_MACH_O_S_ZEROFILL;
2667 else if (bfd_flags & SEC_DEBUGGING)
2668 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2669 else
2670 s->flags = BFD_MACH_O_S_REGULAR;
2671 }
2672
2673 static bfd_boolean
2674 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2675 {
2676 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2677 unsigned int i, j;
2678
2679 seg->vmaddr = 0;
2680 seg->fileoff = mdata->filelen;
2681 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2682 | BFD_MACH_O_PROT_EXECUTE;
2683 seg->maxprot = seg->initprot;
2684
2685 /* Append sections to the segment.
2686
2687 This is a little tedious, we have to honor the need to account zerofill
2688 sections after all the rest. This forces us to do the calculation of
2689 total vmsize in three passes so that any alignment increments are
2690 properly accounted. */
2691 for (i = 0; i < mdata->nsects; ++i)
2692 {
2693 bfd_mach_o_section *s = mdata->sections[i];
2694 asection *sec = s->bfdsection;
2695
2696 /* Although we account for zerofill section sizes in vm order, they are
2697 placed in the file in source sequence. */
2698 bfd_mach_o_append_section_to_segment (seg, s);
2699 s->offset = 0;
2700
2701 /* Zerofill sections have zero file size & offset, the only content
2702 written to the file is the symbols. */
2703 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2704 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2705 == BFD_MACH_O_S_GB_ZEROFILL))
2706 continue;
2707
2708 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2709 sections, even those with zero size. */
2710 if (s->size > 0)
2711 {
2712 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2713 seg->vmsize += s->size;
2714
2715 /* MH_OBJECT files have unaligned content. */
2716 if (1)
2717 {
2718 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2719 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2720 }
2721 seg->filesize += s->size;
2722
2723 /* The system tools write even zero-sized sections with an offset
2724 field set to the current file position. */
2725 s->offset = mdata->filelen;
2726 }
2727
2728 sec->filepos = s->offset;
2729 mdata->filelen += s->size;
2730 }
2731
2732 /* Now pass through again, for zerofill, only now we just update the
2733 vmsize, and then for zerofill_GB. */
2734 for (j = 0; j < 2; j++)
2735 {
2736 unsigned int stype;
2737
2738 if (j == 0)
2739 stype = BFD_MACH_O_S_ZEROFILL;
2740 else
2741 stype = BFD_MACH_O_S_GB_ZEROFILL;
2742
2743 for (i = 0; i < mdata->nsects; ++i)
2744 {
2745 bfd_mach_o_section *s = mdata->sections[i];
2746
2747 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2748 continue;
2749
2750 if (s->size > 0)
2751 {
2752 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2753 seg->vmsize += s->size;
2754 }
2755 }
2756 }
2757
2758 /* Allocate space for the relocations. */
2759 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2760
2761 for (i = 0; i < mdata->nsects; ++i)
2762 {
2763 bfd_mach_o_section *ms = mdata->sections[i];
2764 asection *sec = ms->bfdsection;
2765
2766 ms->nreloc = sec->reloc_count;
2767 if (ms->nreloc == 0)
2768 {
2769 /* Clear nreloc and reloff if there is no relocs. */
2770 ms->reloff = 0;
2771 continue;
2772 }
2773 sec->rel_filepos = mdata->filelen;
2774 ms->reloff = sec->rel_filepos;
2775 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2776 }
2777
2778 return TRUE;
2779 }
2780
2781 static bfd_boolean
2782 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2783 {
2784 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2785 unsigned int i;
2786 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2787 bfd_vma vma;
2788 bfd_mach_o_section *s;
2789
2790 seg->vmsize = 0;
2791
2792 seg->fileoff = mdata->filelen;
2793 seg->maxprot = 0;
2794 seg->initprot = 0;
2795 seg->flags = 0;
2796
2797 /* Append sections to the segment. We assume they are properly ordered
2798 by vma (but we check that). */
2799 vma = 0;
2800 for (i = 0; i < mdata->nsects; ++i)
2801 {
2802 s = mdata->sections[i];
2803
2804 /* Consider only sections for this segment. */
2805 if (strcmp (seg->segname, s->segname) != 0)
2806 continue;
2807
2808 bfd_mach_o_append_section_to_segment (seg, s);
2809
2810 if (s->addr < vma)
2811 {
2812 _bfd_error_handler
2813 /* xgettext:c-format */
2814 (_("section address (%#" PRIx64 ") "
2815 "below start of segment (%#" PRIx64 ")"),
2816 (uint64_t) s->addr, (uint64_t) vma);
2817 return FALSE;
2818 }
2819
2820 vma = s->addr + s->size;
2821 }
2822
2823 /* Set segment file offset: make it page aligned. */
2824 vma = seg->sect_head->addr;
2825 seg->vmaddr = vma & ~pagemask;
2826 if ((mdata->filelen & pagemask) > (vma & pagemask))
2827 mdata->filelen += pagemask + 1;
2828 seg->fileoff = mdata->filelen & ~pagemask;
2829 mdata->filelen = seg->fileoff + (vma & pagemask);
2830
2831 /* Set section file offset. */
2832 for (s = seg->sect_head; s != NULL; s = s->next)
2833 {
2834 asection *sec = s->bfdsection;
2835 flagword flags = bfd_get_section_flags (abfd, sec);
2836
2837 /* Adjust segment size. */
2838 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2839 seg->vmsize += s->size;
2840
2841 /* File offset and length. */
2842 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2843
2844 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
2845 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2846 != BFD_MACH_O_S_GB_ZEROFILL))
2847 {
2848 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2849
2850 s->offset = mdata->filelen;
2851 s->bfdsection->filepos = s->offset;
2852
2853 seg->filesize += s->size;
2854 mdata->filelen += s->size;
2855 }
2856 else
2857 {
2858 s->offset = 0;
2859 s->bfdsection->filepos = 0;
2860 }
2861
2862 /* Set protection. */
2863 if (flags & SEC_LOAD)
2864 {
2865 if (flags & SEC_CODE)
2866 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
2867 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
2868 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
2869 }
2870
2871 /* Relocs shouldn't appear in non-object files. */
2872 if (s->bfdsection->reloc_count != 0)
2873 return FALSE;
2874 }
2875
2876 /* Set maxprot. */
2877 if (seg->initprot != 0)
2878 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2879 | BFD_MACH_O_PROT_EXECUTE;
2880 else
2881 seg->maxprot = 0;
2882
2883 /* Round segment size (and file size). */
2884 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
2885 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
2886 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
2887
2888 return TRUE;
2889 }
2890
2891 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
2892 fields in header. */
2893
2894 static bfd_boolean
2895 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
2896 {
2897 unsigned wide = mach_o_wide_p (&mdata->header);
2898 unsigned int hdrlen;
2899 ufile_ptr offset;
2900 bfd_mach_o_load_command *cmd;
2901 unsigned int align;
2902 bfd_boolean ret = TRUE;
2903
2904 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2905 align = wide ? 8 - 1 : 4 - 1;
2906 offset = hdrlen;
2907 mdata->header.ncmds = 0;
2908
2909 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
2910 {
2911 mdata->header.ncmds++;
2912 cmd->offset = offset;
2913
2914 switch (cmd->type)
2915 {
2916 case BFD_MACH_O_LC_SEGMENT_64:
2917 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2918 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
2919 break;
2920 case BFD_MACH_O_LC_SEGMENT:
2921 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2922 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
2923 break;
2924 case BFD_MACH_O_LC_SYMTAB:
2925 cmd->len = sizeof (struct mach_o_symtab_command_external)
2926 + BFD_MACH_O_LC_SIZE;
2927 break;
2928 case BFD_MACH_O_LC_DYSYMTAB:
2929 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2930 + BFD_MACH_O_LC_SIZE;
2931 break;
2932 case BFD_MACH_O_LC_LOAD_DYLIB:
2933 cmd->len = sizeof (struct mach_o_dylib_command_external)
2934 + BFD_MACH_O_LC_SIZE;
2935 cmd->command.dylib.name_offset = cmd->len;
2936 cmd->len += strlen (cmd->command.dylib.name_str);
2937 cmd->len = (cmd->len + align) & ~align;
2938 break;
2939 case BFD_MACH_O_LC_LOAD_DYLINKER:
2940 cmd->len = sizeof (struct mach_o_str_command_external)
2941 + BFD_MACH_O_LC_SIZE;
2942 cmd->command.dylinker.name_offset = cmd->len;
2943 cmd->len += strlen (cmd->command.dylinker.name_str);
2944 cmd->len = (cmd->len + align) & ~align;
2945 break;
2946 case BFD_MACH_O_LC_MAIN:
2947 cmd->len = sizeof (struct mach_o_entry_point_command_external)
2948 + BFD_MACH_O_LC_SIZE;
2949 break;
2950 case BFD_MACH_O_LC_DYLD_INFO:
2951 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
2952 + BFD_MACH_O_LC_SIZE;
2953 break;
2954 default:
2955 _bfd_error_handler
2956 (_("unable to layout unknown load command %#x"),
2957 cmd->type);
2958 ret = FALSE;
2959 break;
2960 }
2961
2962 BFD_ASSERT (cmd->len % (align + 1) == 0);
2963 offset += cmd->len;
2964 }
2965 mdata->header.sizeofcmds = offset - hdrlen;
2966 mdata->filelen = offset;
2967
2968 return ret;
2969 }
2970
2971 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
2972 segment. */
2973
2974 static void
2975 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
2976 bfd_mach_o_load_command *cmd,
2977 const char *segname, unsigned int nbr_sect)
2978 {
2979 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2980 unsigned wide = mach_o_wide_p (&mdata->header);
2981
2982 /* Init segment command. */
2983 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
2984 cmd->type_required = FALSE;
2985
2986 strcpy (seg->segname, segname);
2987 seg->nsects = nbr_sect;
2988
2989 seg->vmaddr = 0;
2990 seg->vmsize = 0;
2991
2992 seg->fileoff = 0;
2993 seg->filesize = 0;
2994 seg->maxprot = 0;
2995 seg->initprot = 0;
2996 seg->flags = 0;
2997 seg->sect_head = NULL;
2998 seg->sect_tail = NULL;
2999 }
3000
3001 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3002 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3003 and copy functionality. */
3004
3005 bfd_boolean
3006 bfd_mach_o_build_commands (bfd *abfd)
3007 {
3008 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3009 unsigned wide = mach_o_wide_p (&mdata->header);
3010 unsigned int nbr_segcmd = 0;
3011 bfd_mach_o_load_command *commands;
3012 unsigned int nbr_commands;
3013 int symtab_idx = -1;
3014 int dysymtab_idx = -1;
3015 int main_idx = -1;
3016 unsigned int i;
3017
3018 /* Return now if already built. */
3019 if (mdata->header.ncmds != 0)
3020 return TRUE;
3021
3022 /* Fill in the file type, if not already set. */
3023 if (mdata->header.filetype == 0)
3024 {
3025 if (abfd->flags & EXEC_P)
3026 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3027 else if (abfd->flags & DYNAMIC)
3028 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3029 else
3030 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3031 }
3032
3033 /* If hasn't already been done, flatten sections list, and sort
3034 if/when required. Must be done before the symbol table is adjusted,
3035 since that depends on properly numbered sections. */
3036 if (mdata->nsects == 0 || mdata->sections == NULL)
3037 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3038 return FALSE;
3039
3040 /* Order the symbol table, fill-in/check mach-o specific fields and
3041 partition out any indirect symbols. */
3042 if (!bfd_mach_o_mangle_symbols (abfd))
3043 return FALSE;
3044
3045 /* Segment commands. */
3046 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3047 {
3048 /* Only one segment for all the sections. But the segment is
3049 optional if there is no sections. */
3050 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3051 }
3052 else
3053 {
3054 bfd_mach_o_section *prev_sect = NULL;
3055
3056 /* One pagezero segment and one linkedit segment. */
3057 nbr_segcmd = 2;
3058
3059 /* Create one segment for associated segment name in sections.
3060 Assume that sections with the same segment name are consecutive. */
3061 for (i = 0; i < mdata->nsects; i++)
3062 {
3063 bfd_mach_o_section *this_sect = mdata->sections[i];
3064
3065 if (prev_sect == NULL
3066 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3067 {
3068 nbr_segcmd++;
3069 prev_sect = this_sect;
3070 }
3071 }
3072 }
3073
3074 nbr_commands = nbr_segcmd;
3075
3076 /* One command for the symbol table (only if there are symbols. */
3077 if (bfd_get_symcount (abfd) > 0)
3078 symtab_idx = nbr_commands++;
3079
3080 /* FIXME:
3081 This is a rather crude test for whether we should build a dysymtab. */
3082 if (bfd_mach_o_should_emit_dysymtab ()
3083 && bfd_get_symcount (abfd))
3084 {
3085 /* If there should be a case where a dysymtab could be emitted without
3086 a symtab (seems improbable), this would need amending. */
3087 dysymtab_idx = nbr_commands++;
3088 }
3089
3090 /* Add an entry point command. */
3091 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3092 && bfd_get_start_address (abfd) != 0)
3093 main_idx = nbr_commands++;
3094
3095 /* Well, we must have a header, at least. */
3096 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3097
3098 /* A bit unusual, but no content is valid;
3099 as -n empty.s -o empty.o */
3100 if (nbr_commands == 0)
3101 {
3102 /* Layout commands (well none...) and set headers command fields. */
3103 return bfd_mach_o_layout_commands (mdata);
3104 }
3105
3106 /* Create commands for segments (and symtabs), prepend them. */
3107 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3108 if (commands == NULL)
3109 return FALSE;
3110 for (i = 0; i < nbr_commands - 1; i++)
3111 commands[i].next = &commands[i + 1];
3112 commands[nbr_commands - 1].next = mdata->first_command;
3113 if (mdata->first_command == NULL)
3114 mdata->last_command = &commands[nbr_commands - 1];
3115 mdata->first_command = &commands[0];
3116
3117 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3118 {
3119 /* For object file, there is only one segment. */
3120 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3121 }
3122 else if (nbr_segcmd != 0)
3123 {
3124 bfd_mach_o_load_command *cmd;
3125
3126 BFD_ASSERT (nbr_segcmd >= 2);
3127
3128 /* The pagezero. */
3129 cmd = &commands[0];
3130 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3131
3132 /* Segments from sections. */
3133 cmd++;
3134 for (i = 0; i < mdata->nsects;)
3135 {
3136 const char *segname = mdata->sections[i]->segname;
3137 unsigned int nbr_sect = 1;
3138
3139 /* Count number of sections for this segment. */
3140 for (i++; i < mdata->nsects; i++)
3141 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3142 nbr_sect++;
3143 else
3144 break;
3145
3146 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3147 cmd++;
3148 }
3149
3150 /* The linkedit. */
3151 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3152 }
3153
3154 if (symtab_idx >= 0)
3155 {
3156 /* Init symtab command. */
3157 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3158
3159 cmd->type = BFD_MACH_O_LC_SYMTAB;
3160 cmd->type_required = FALSE;
3161 }
3162
3163 /* If required, setup symtab command, see comment above about the quality
3164 of this test. */
3165 if (dysymtab_idx >= 0)
3166 {
3167 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3168
3169 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3170 cmd->type_required = FALSE;
3171 }
3172
3173 /* Create the main command. */
3174 if (main_idx >= 0)
3175 {
3176 bfd_mach_o_load_command *cmd = &commands[main_idx];
3177
3178 cmd->type = BFD_MACH_O_LC_MAIN;
3179 cmd->type_required = TRUE;
3180
3181 cmd->command.main.entryoff = 0;
3182 cmd->command.main.stacksize = 0;
3183 }
3184
3185 /* Layout commands. */
3186 if (! bfd_mach_o_layout_commands (mdata))
3187 return FALSE;
3188
3189 /* So, now we have sized the commands and the filelen set to that.
3190 Now we can build the segment command and set the section file offsets. */
3191 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3192 {
3193 for (i = 0; i < nbr_segcmd; i++)
3194 if (!bfd_mach_o_build_obj_seg_command
3195 (abfd, &commands[i].command.segment))
3196 return FALSE;
3197 }
3198 else
3199 {
3200 bfd_vma maxvma = 0;
3201
3202 /* Skip pagezero and linkedit segments. */
3203 for (i = 1; i < nbr_segcmd - 1; i++)
3204 {
3205 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3206
3207 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3208 return FALSE;
3209
3210 if (seg->vmaddr + seg->vmsize > maxvma)
3211 maxvma = seg->vmaddr + seg->vmsize;
3212 }
3213
3214 /* Set the size of __PAGEZERO. */
3215 commands[0].command.segment.vmsize =
3216 commands[1].command.segment.vmaddr;
3217
3218 /* Set the vma and fileoff of __LINKEDIT. */
3219 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3220 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3221
3222 /* Set entry point (once segments have been laid out). */
3223 if (main_idx >= 0)
3224 commands[main_idx].command.main.entryoff =
3225 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3226 }
3227
3228 return TRUE;
3229 }
3230
3231 /* Set the contents of a section. */
3232
3233 bfd_boolean
3234 bfd_mach_o_set_section_contents (bfd *abfd,
3235 asection *section,
3236 const void * location,
3237 file_ptr offset,
3238 bfd_size_type count)
3239 {
3240 file_ptr pos;
3241
3242 /* Trying to write the first section contents will trigger the creation of
3243 the load commands if they are not already present. */
3244 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3245 return FALSE;
3246
3247 if (count == 0)
3248 return TRUE;
3249
3250 pos = section->filepos + offset;
3251 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3252 || bfd_bwrite (location, count, abfd) != count)
3253 return FALSE;
3254
3255 return TRUE;
3256 }
3257
3258 int
3259 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3260 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3261 {
3262 return 0;
3263 }
3264
3265 /* Make an empty symbol. This is required only because
3266 bfd_make_section_anyway wants to create a symbol for the section. */
3267
3268 asymbol *
3269 bfd_mach_o_make_empty_symbol (bfd *abfd)
3270 {
3271 asymbol *new_symbol;
3272
3273 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3274 if (new_symbol == NULL)
3275 return new_symbol;
3276 new_symbol->the_bfd = abfd;
3277 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3278 return new_symbol;
3279 }
3280
3281 static bfd_boolean
3282 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3283 {
3284 struct mach_o_header_external raw;
3285 unsigned int size;
3286 bfd_vma (*get32) (const void *) = NULL;
3287
3288 /* Just read the magic number. */
3289 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3290 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3291 return FALSE;
3292
3293 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3294 {
3295 header->byteorder = BFD_ENDIAN_BIG;
3296 header->magic = BFD_MACH_O_MH_MAGIC;
3297 header->version = 1;
3298 get32 = bfd_getb32;
3299 }
3300 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3301 {
3302 header->byteorder = BFD_ENDIAN_LITTLE;
3303 header->magic = BFD_MACH_O_MH_MAGIC;
3304 header->version = 1;
3305 get32 = bfd_getl32;
3306 }
3307 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3308 {
3309 header->byteorder = BFD_ENDIAN_BIG;
3310 header->magic = BFD_MACH_O_MH_MAGIC_64;
3311 header->version = 2;
3312 get32 = bfd_getb32;
3313 }
3314 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3315 {
3316 header->byteorder = BFD_ENDIAN_LITTLE;
3317 header->magic = BFD_MACH_O_MH_MAGIC_64;
3318 header->version = 2;
3319 get32 = bfd_getl32;
3320 }
3321 else
3322 {
3323 header->byteorder = BFD_ENDIAN_UNKNOWN;
3324 return FALSE;
3325 }
3326
3327 /* Once the size of the header is known, read the full header. */
3328 size = mach_o_wide_p (header) ?
3329 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3330
3331 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3332 || bfd_bread (&raw, size, abfd) != size)
3333 return FALSE;
3334
3335 header->cputype = (*get32) (raw.cputype);
3336 header->cpusubtype = (*get32) (raw.cpusubtype);
3337 header->filetype = (*get32) (raw.filetype);
3338 header->ncmds = (*get32) (raw.ncmds);
3339 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3340 header->flags = (*get32) (raw.flags);
3341
3342 if (mach_o_wide_p (header))
3343 header->reserved = (*get32) (raw.reserved);
3344 else
3345 header->reserved = 0;
3346
3347 return TRUE;
3348 }
3349
3350 bfd_boolean
3351 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3352 {
3353 bfd_mach_o_section *s;
3354 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
3355
3356 s = bfd_mach_o_get_mach_o_section (sec);
3357 if (s == NULL)
3358 {
3359 flagword bfd_flags;
3360 static const mach_o_section_name_xlat * xlat;
3361
3362 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3363 if (s == NULL)
3364 return FALSE;
3365 sec->used_by_bfd = s;
3366 s->bfdsection = sec;
3367
3368 /* Create the Darwin seg/sect name pair from the bfd name.
3369 If this is a canonical name for which a specific paiting exists
3370 there will also be defined flags, type, attribute and alignment
3371 values. */
3372 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3373 if (xlat != NULL)
3374 {
3375 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3376 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3377 : bfdalign;
3378 (void) bfd_set_section_alignment (abfd, sec, s->align);
3379 bfd_flags = bfd_get_section_flags (abfd, sec);
3380 if (bfd_flags == SEC_NO_FLAGS)
3381 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
3382 }
3383 else
3384 /* Create default flags. */
3385 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3386 }
3387
3388 return _bfd_generic_new_section_hook (abfd, sec);
3389 }
3390
3391 static void
3392 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
3393 unsigned long prot)
3394 {
3395 flagword flags;
3396 bfd_mach_o_section *section;
3397
3398 flags = bfd_get_section_flags (abfd, sec);
3399 section = bfd_mach_o_get_mach_o_section (sec);
3400
3401 /* TODO: see if we should use the xlat system for doing this by
3402 preference and fall back to this for unknown sections. */
3403
3404 if (flags == SEC_NO_FLAGS)
3405 {
3406 /* Try to guess flags. */
3407 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3408 flags = SEC_DEBUGGING;
3409 else
3410 {
3411 flags = SEC_ALLOC;
3412 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3413 != BFD_MACH_O_S_ZEROFILL)
3414 {
3415 flags |= SEC_LOAD;
3416 if (prot & BFD_MACH_O_PROT_EXECUTE)
3417 flags |= SEC_CODE;
3418 if (prot & BFD_MACH_O_PROT_WRITE)
3419 flags |= SEC_DATA;
3420 else if (prot & BFD_MACH_O_PROT_READ)
3421 flags |= SEC_READONLY;
3422 }
3423 }
3424 }
3425 else
3426 {
3427 if ((flags & SEC_DEBUGGING) == 0)
3428 flags |= SEC_ALLOC;
3429 }
3430
3431 if (section->offset != 0)
3432 flags |= SEC_HAS_CONTENTS;
3433 if (section->nreloc != 0)
3434 flags |= SEC_RELOC;
3435
3436 bfd_set_section_flags (abfd, sec, flags);
3437
3438 sec->vma = section->addr;
3439 sec->lma = section->addr;
3440 sec->size = section->size;
3441 sec->filepos = section->offset;
3442 sec->alignment_power = section->align;
3443 sec->segment_mark = 0;
3444 sec->reloc_count = section->nreloc;
3445 sec->rel_filepos = section->reloff;
3446 }
3447
3448 static asection *
3449 bfd_mach_o_make_bfd_section (bfd *abfd,
3450 const unsigned char *segname,
3451 const unsigned char *sectname)
3452 {
3453 const char *sname;
3454 flagword flags;
3455
3456 bfd_mach_o_convert_section_name_to_bfd
3457 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3458 if (sname == NULL)
3459 return NULL;
3460
3461 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3462 }
3463
3464 static asection *
3465 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3466 {
3467 struct mach_o_section_32_external raw;
3468 asection *sec;
3469 bfd_mach_o_section *section;
3470
3471 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3472 != BFD_MACH_O_SECTION_SIZE)
3473 return NULL;
3474
3475 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3476 if (sec == NULL)
3477 return NULL;
3478
3479 section = bfd_mach_o_get_mach_o_section (sec);
3480 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3481 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3482 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3483 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3484 section->addr = bfd_h_get_32 (abfd, raw.addr);
3485 section->size = bfd_h_get_32 (abfd, raw.size);
3486 section->offset = bfd_h_get_32 (abfd, raw.offset);
3487 section->align = bfd_h_get_32 (abfd, raw.align);
3488 /* PR 17512: file: 0017eb76. */
3489 if (section->align > 64)
3490 {
3491 _bfd_error_handler
3492 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3493 "using 32 instead"), section->align);
3494 section->align = 32;
3495 }
3496 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3497 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3498 section->flags = bfd_h_get_32 (abfd, raw.flags);
3499 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3500 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3501 section->reserved3 = 0;
3502
3503 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3504
3505 return sec;
3506 }
3507
3508 static asection *
3509 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3510 {
3511 struct mach_o_section_64_external raw;
3512 asection *sec;
3513 bfd_mach_o_section *section;
3514
3515 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3516 != BFD_MACH_O_SECTION_64_SIZE)
3517 return NULL;
3518
3519 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3520 if (sec == NULL)
3521 return NULL;
3522
3523 section = bfd_mach_o_get_mach_o_section (sec);
3524 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3525 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3526 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3527 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3528 section->addr = bfd_h_get_64 (abfd, raw.addr);
3529 section->size = bfd_h_get_64 (abfd, raw.size);
3530 section->offset = bfd_h_get_32 (abfd, raw.offset);
3531 section->align = bfd_h_get_32 (abfd, raw.align);
3532 if (section->align > 64)
3533 {
3534 _bfd_error_handler
3535 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3536 "using 32 instead"), section->align);
3537 section->align = 32;
3538 }
3539 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3540 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3541 section->flags = bfd_h_get_32 (abfd, raw.flags);
3542 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3543 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3544 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3545
3546 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
3547
3548 return sec;
3549 }
3550
3551 static asection *
3552 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3553 {
3554 if (wide)
3555 return bfd_mach_o_read_section_64 (abfd, prot);
3556 else
3557 return bfd_mach_o_read_section_32 (abfd, prot);
3558 }
3559
3560 static bfd_boolean
3561 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3562 bfd_mach_o_symtab_command *sym,
3563 bfd_mach_o_asymbol *s,
3564 unsigned long i)
3565 {
3566 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3567 unsigned int wide = mach_o_wide_p (&mdata->header);
3568 unsigned int symwidth =
3569 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3570 unsigned int symoff = sym->symoff + (i * symwidth);
3571 struct mach_o_nlist_64_external raw;
3572 unsigned char type = -1;
3573 unsigned char section = -1;
3574 short desc = -1;
3575 symvalue value = -1;
3576 unsigned long stroff = -1;
3577 unsigned int symtype = -1;
3578
3579 BFD_ASSERT (sym->strtab != NULL);
3580
3581 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3582 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3583 {
3584 _bfd_error_handler
3585 /* xgettext:c-format */
3586 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3587 symwidth, symoff);
3588 return FALSE;
3589 }
3590
3591 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3592 type = bfd_h_get_8 (abfd, raw.n_type);
3593 symtype = type & BFD_MACH_O_N_TYPE;
3594 section = bfd_h_get_8 (abfd, raw.n_sect);
3595 desc = bfd_h_get_16 (abfd, raw.n_desc);
3596 if (wide)
3597 value = bfd_h_get_64 (abfd, raw.n_value);
3598 else
3599 value = bfd_h_get_32 (abfd, raw.n_value);
3600
3601 if (stroff >= sym->strsize)
3602 {
3603 _bfd_error_handler
3604 /* xgettext:c-format */
3605 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3606 stroff,
3607 sym->strsize);
3608 return FALSE;
3609 }
3610
3611 s->symbol.the_bfd = abfd;
3612 s->symbol.name = sym->strtab + stroff;
3613 s->symbol.value = value;
3614 s->symbol.flags = 0x0;
3615 s->symbol.udata.i = i;
3616 s->n_type = type;
3617 s->n_sect = section;
3618 s->n_desc = desc;
3619
3620 if (type & BFD_MACH_O_N_STAB)
3621 {
3622 s->symbol.flags |= BSF_DEBUGGING;
3623 s->symbol.section = bfd_und_section_ptr;
3624 switch (type)
3625 {
3626 case N_FUN:
3627 case N_STSYM:
3628 case N_LCSYM:
3629 case N_BNSYM:
3630 case N_SLINE:
3631 case N_ENSYM:
3632 case N_ECOMM:
3633 case N_ECOML:
3634 case N_GSYM:
3635 if ((section > 0) && (section <= mdata->nsects))
3636 {
3637 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3638 s->symbol.value =
3639 s->symbol.value - mdata->sections[section - 1]->addr;
3640 }
3641 break;
3642 }
3643 }
3644 else
3645 {
3646 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3647 s->symbol.flags |= BSF_GLOBAL;
3648 else
3649 s->symbol.flags |= BSF_LOCAL;
3650
3651 switch (symtype)
3652 {
3653 case BFD_MACH_O_N_UNDF:
3654 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3655 && s->symbol.value != 0)
3656 {
3657 /* A common symbol. */
3658 s->symbol.section = bfd_com_section_ptr;
3659 s->symbol.flags = BSF_NO_FLAGS;
3660 }
3661 else
3662 {
3663 s->symbol.section = bfd_und_section_ptr;
3664 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3665 s->symbol.flags |= BSF_WEAK;
3666 }
3667 break;
3668 case BFD_MACH_O_N_PBUD:
3669 s->symbol.section = bfd_und_section_ptr;
3670 break;
3671 case BFD_MACH_O_N_ABS:
3672 s->symbol.section = bfd_abs_section_ptr;
3673 break;
3674 case BFD_MACH_O_N_SECT:
3675 if ((section > 0) && (section <= mdata->nsects))
3676 {
3677 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3678 s->symbol.value =
3679 s->symbol.value - mdata->sections[section - 1]->addr;
3680 }
3681 else
3682 {
3683 /* Mach-O uses 0 to mean "no section"; not an error. */
3684 if (section != 0)
3685 {
3686 _bfd_error_handler
3687 /* xgettext:c-format */
3688 (_("bfd_mach_o_read_symtab_symbol: "
3689 "symbol \"%s\" specified invalid section %d (max %lu): "
3690 "setting to undefined"),
3691 s->symbol.name, section, mdata->nsects);
3692 }
3693 s->symbol.section = bfd_und_section_ptr;
3694 }
3695 break;
3696 case BFD_MACH_O_N_INDR:
3697 /* FIXME: we don't follow the BFD convention as this indirect symbol
3698 won't be followed by the referenced one. This looks harmless
3699 unless we start using the linker. */
3700 s->symbol.flags |= BSF_INDIRECT;
3701 s->symbol.section = bfd_ind_section_ptr;
3702 s->symbol.value = 0;
3703 break;
3704 default:
3705 _bfd_error_handler
3706 /* xgettext:c-format */
3707 (_("bfd_mach_o_read_symtab_symbol: "
3708 "symbol \"%s\" specified invalid type field 0x%x: "
3709 "setting to undefined"), s->symbol.name, symtype);
3710 s->symbol.section = bfd_und_section_ptr;
3711 break;
3712 }
3713 }
3714
3715 return TRUE;
3716 }
3717
3718 bfd_boolean
3719 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3720 {
3721 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3722 bfd_mach_o_symtab_command *sym = mdata->symtab;
3723
3724 /* Fail if there is no symtab. */
3725 if (sym == NULL)
3726 return FALSE;
3727
3728 /* Success if already loaded. */
3729 if (sym->strtab)
3730 return TRUE;
3731
3732 if (abfd->flags & BFD_IN_MEMORY)
3733 {
3734 struct bfd_in_memory *b;
3735
3736 b = (struct bfd_in_memory *) abfd->iostream;
3737
3738 if ((sym->stroff + sym->strsize) > b->size)
3739 {
3740 bfd_set_error (bfd_error_file_truncated);
3741 return FALSE;
3742 }
3743 sym->strtab = (char *) b->buffer + sym->stroff;
3744 }
3745 else
3746 {
3747 /* See PR 21840 for a reproducer. */
3748 if ((sym->strsize + 1) == 0)
3749 return FALSE;
3750 sym->strtab = bfd_alloc (abfd, sym->strsize + 1);
3751 if (sym->strtab == NULL)
3752 return FALSE;
3753
3754 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3755 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3756 {
3757 /* PR 17512: file: 10888-1609-0.004. */
3758 bfd_release (abfd, sym->strtab);
3759 sym->strtab = NULL;
3760 bfd_set_error (bfd_error_file_truncated);
3761 return FALSE;
3762 }
3763 /* Zero terminate the string table. */
3764 sym->strtab[sym->strsize] = 0;
3765 }
3766
3767 return TRUE;
3768 }
3769
3770 bfd_boolean
3771 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3772 {
3773 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3774 bfd_mach_o_symtab_command *sym = mdata->symtab;
3775 unsigned long i;
3776
3777 if (sym == NULL || sym->symbols)
3778 /* Return now if there are no symbols or if already loaded. */
3779 return TRUE;
3780
3781 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol));
3782 if (sym->symbols == NULL)
3783 {
3784 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: "
3785 "unable to allocate memory for symbols"));
3786 sym->nsyms = 0;
3787 return FALSE;
3788 }
3789
3790 if (!bfd_mach_o_read_symtab_strtab (abfd))
3791 goto fail;
3792
3793 for (i = 0; i < sym->nsyms; i++)
3794 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3795 goto fail;
3796
3797 return TRUE;
3798
3799 fail:
3800 bfd_release (abfd, sym->symbols);
3801 sym->symbols = NULL;
3802 sym->nsyms = 0;
3803 return FALSE;
3804 }
3805
3806 static const char *
3807 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3808 {
3809 switch ((int) flavour)
3810 {
3811 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3812 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3813 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3814 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3815 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3816 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3817 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3818 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3819 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3820 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3821 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3822 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3823 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3824 default: return "UNKNOWN";
3825 }
3826 }
3827
3828 static const char *
3829 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3830 {
3831 switch ((int) flavour)
3832 {
3833 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3834 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3835 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3836 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3837 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3838 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3839 default: return "UNKNOWN";
3840 }
3841 }
3842
3843 static bfd_boolean
3844 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3845 {
3846 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3847 struct mach_o_str_command_external raw;
3848 unsigned int nameoff;
3849 unsigned int namelen;
3850
3851 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3852 return FALSE;
3853
3854 nameoff = bfd_h_get_32 (abfd, raw.str);
3855
3856 cmd->name_offset = nameoff;
3857 namelen = command->len - nameoff;
3858 nameoff += command->offset;
3859 cmd->name_str = bfd_alloc (abfd, namelen);
3860 if (cmd->name_str == NULL)
3861 return FALSE;
3862 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3863 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3864 return FALSE;
3865 return TRUE;
3866 }
3867
3868 static bfd_boolean
3869 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3870 {
3871 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3872 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3873 struct mach_o_dylib_command_external raw;
3874 unsigned int nameoff;
3875 unsigned int namelen;
3876
3877 switch (command->type)
3878 {
3879 case BFD_MACH_O_LC_LOAD_DYLIB:
3880 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3881 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3882 case BFD_MACH_O_LC_ID_DYLIB:
3883 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3884 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3885 break;
3886 default:
3887 BFD_FAIL ();
3888 return FALSE;
3889 }
3890
3891 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3892 return FALSE;
3893
3894 nameoff = bfd_h_get_32 (abfd, raw.name);
3895 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3896 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3897 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3898
3899 cmd->name_offset = command->offset + nameoff;
3900 namelen = command->len - nameoff;
3901 cmd->name_str = bfd_alloc (abfd, namelen);
3902 if (cmd->name_str == NULL)
3903 return FALSE;
3904 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0
3905 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3906 return FALSE;
3907 return TRUE;
3908 }
3909
3910 static bfd_boolean
3911 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3912 bfd_mach_o_load_command *command)
3913 {
3914 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3915 struct mach_o_prebound_dylib_command_external raw;
3916 unsigned int nameoff;
3917 unsigned int modoff;
3918 unsigned int str_len;
3919 unsigned char *str;
3920
3921 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3922 return FALSE;
3923
3924 nameoff = bfd_h_get_32 (abfd, raw.name);
3925 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3926 if (nameoff > command->len || modoff > command->len)
3927 return FALSE;
3928
3929 str_len = command->len - sizeof (raw);
3930 str = bfd_alloc (abfd, str_len);
3931 if (str == NULL)
3932 return FALSE;
3933 if (bfd_bread (str, str_len, abfd) != str_len)
3934 return FALSE;
3935
3936 cmd->name_offset = command->offset + nameoff;
3937 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3938 cmd->linked_modules_offset = command->offset + modoff;
3939
3940 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3941 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3942 return TRUE;
3943 }
3944
3945 static bfd_boolean
3946 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3947 bfd_mach_o_load_command *command)
3948 {
3949 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3950 struct mach_o_prebind_cksum_command_external raw;
3951
3952 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3953 return FALSE;
3954
3955 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3956 return TRUE;
3957 }
3958
3959 static bfd_boolean
3960 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3961 bfd_mach_o_load_command *command)
3962 {
3963 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3964 struct mach_o_twolevel_hints_command_external raw;
3965
3966 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3967 return FALSE;
3968
3969 cmd->offset = bfd_get_32 (abfd, raw.offset);
3970 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3971 return TRUE;
3972 }
3973
3974 static bfd_boolean
3975 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3976 {
3977 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3978 struct mach_o_fvmlib_command_external raw;
3979 unsigned int nameoff;
3980 unsigned int namelen;
3981
3982 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3983 return FALSE;
3984
3985 nameoff = bfd_h_get_32 (abfd, raw.name);
3986 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3987 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3988
3989 fvm->name_offset = command->offset + nameoff;
3990 namelen = command->len - nameoff;
3991 fvm->name_str = bfd_alloc (abfd, namelen);
3992 if (fvm->name_str == NULL)
3993 return FALSE;
3994 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3995 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3996 return FALSE;
3997 return TRUE;
3998 }
3999
4000 static bfd_boolean
4001 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4002 {
4003 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4004 bfd_mach_o_thread_command *cmd = &command->command.thread;
4005 unsigned int offset;
4006 unsigned int nflavours;
4007 unsigned int i;
4008
4009 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4010 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4011
4012 /* Count the number of threads. */
4013 offset = 8;
4014 nflavours = 0;
4015 while (offset != command->len)
4016 {
4017 struct mach_o_thread_command_external raw;
4018
4019 if (offset >= command->len)
4020 return FALSE;
4021
4022 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4023 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4024 return FALSE;
4025
4026 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
4027 nflavours++;
4028 }
4029
4030 /* Allocate threads. */
4031 cmd->flavours = bfd_alloc2
4032 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour));
4033 if (cmd->flavours == NULL)
4034 return FALSE;
4035 cmd->nflavours = nflavours;
4036
4037 offset = 8;
4038 nflavours = 0;
4039 while (offset != command->len)
4040 {
4041 struct mach_o_thread_command_external raw;
4042
4043 if (offset >= command->len)
4044 return FALSE;
4045
4046 if (nflavours >= cmd->nflavours)
4047 return FALSE;
4048
4049 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4050 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4051 return FALSE;
4052
4053 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4054 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4055 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4056 offset += cmd->flavours[nflavours].size + sizeof (raw);
4057 nflavours++;
4058 }
4059
4060 for (i = 0; i < nflavours; i++)
4061 {
4062 asection *bfdsec;
4063 unsigned int snamelen;
4064 char *sname;
4065 const char *flavourstr;
4066 const char *prefix = "LC_THREAD";
4067 unsigned int j = 0;
4068
4069 switch (mdata->header.cputype)
4070 {
4071 case BFD_MACH_O_CPU_TYPE_POWERPC:
4072 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4073 flavourstr =
4074 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4075 break;
4076 case BFD_MACH_O_CPU_TYPE_I386:
4077 case BFD_MACH_O_CPU_TYPE_X86_64:
4078 flavourstr =
4079 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4080 break;
4081 default:
4082 flavourstr = "UNKNOWN_ARCHITECTURE";
4083 break;
4084 }
4085
4086 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4087 sname = bfd_alloc (abfd, snamelen);
4088 if (sname == NULL)
4089 return FALSE;
4090
4091 for (;;)
4092 {
4093 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4094 if (bfd_get_section_by_name (abfd, sname) == NULL)
4095 break;
4096 j++;
4097 }
4098
4099 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4100
4101 bfdsec->vma = 0;
4102 bfdsec->lma = 0;
4103 bfdsec->size = cmd->flavours[i].size;
4104 bfdsec->filepos = cmd->flavours[i].offset;
4105 bfdsec->alignment_power = 0x0;
4106
4107 cmd->section = bfdsec;
4108 }
4109
4110 return TRUE;
4111 }
4112
4113 static bfd_boolean
4114 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
4115 {
4116 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4117 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4118
4119 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4120
4121 {
4122 struct mach_o_dysymtab_command_external raw;
4123
4124 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4125 return FALSE;
4126
4127 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4128 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4129 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4130 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4131 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4132 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4133 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4134 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4135 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4136 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4137 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4138 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4139 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4140 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4141 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4142 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4143 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4144 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4145 }
4146
4147 if (cmd->nmodtab != 0)
4148 {
4149 unsigned int i;
4150 int wide = bfd_mach_o_wide_p (abfd);
4151 unsigned int module_len = wide ? 56 : 52;
4152
4153 cmd->dylib_module =
4154 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module));
4155 if (cmd->dylib_module == NULL)
4156 return FALSE;
4157
4158 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4159 return FALSE;
4160
4161 for (i = 0; i < cmd->nmodtab; i++)
4162 {
4163 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4164 unsigned long v;
4165 unsigned char buf[56];
4166
4167 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4168 return FALSE;
4169
4170 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4171 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4172 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4173 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4174 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4175 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4176 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4177 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4178 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4179 v = bfd_h_get_32 (abfd, buf +36);
4180 module->iinit = v & 0xffff;
4181 module->iterm = (v >> 16) & 0xffff;
4182 v = bfd_h_get_32 (abfd, buf + 40);
4183 module->ninit = v & 0xffff;
4184 module->nterm = (v >> 16) & 0xffff;
4185 if (wide)
4186 {
4187 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4188 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4189 }
4190 else
4191 {
4192 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4193 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4194 }
4195 }
4196 }
4197
4198 if (cmd->ntoc != 0)
4199 {
4200 unsigned long i;
4201
4202 cmd->dylib_toc = bfd_alloc2
4203 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content));
4204 if (cmd->dylib_toc == NULL)
4205 return FALSE;
4206
4207 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4208 return FALSE;
4209
4210 for (i = 0; i < cmd->ntoc; i++)
4211 {
4212 struct mach_o_dylib_table_of_contents_external raw;
4213 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4214
4215 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4216 return FALSE;
4217
4218 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4219 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4220 }
4221 }
4222
4223 if (cmd->nindirectsyms != 0)
4224 {
4225 unsigned int i;
4226
4227 cmd->indirect_syms = bfd_alloc2
4228 (abfd, cmd->nindirectsyms, sizeof (unsigned int));
4229 if (cmd->indirect_syms == NULL)
4230 return FALSE;
4231
4232 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4233 return FALSE;
4234
4235 for (i = 0; i < cmd->nindirectsyms; i++)
4236 {
4237 unsigned char raw[4];
4238 unsigned int *is = &cmd->indirect_syms[i];
4239
4240 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4241 return FALSE;
4242
4243 *is = bfd_h_get_32 (abfd, raw);
4244 }
4245 }
4246
4247 if (cmd->nextrefsyms != 0)
4248 {
4249 unsigned long v;
4250 unsigned int i;
4251
4252 cmd->ext_refs = bfd_alloc2
4253 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference));
4254 if (cmd->ext_refs == NULL)
4255 return FALSE;
4256
4257 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4258 return FALSE;
4259
4260 for (i = 0; i < cmd->nextrefsyms; i++)
4261 {
4262 unsigned char raw[4];
4263 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4264
4265 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4266 return FALSE;
4267
4268 /* Fields isym and flags are written as bit-fields, thus we need
4269 a specific processing for endianness. */
4270 v = bfd_h_get_32 (abfd, raw);
4271 if (bfd_big_endian (abfd))
4272 {
4273 ref->isym = (v >> 8) & 0xffffff;
4274 ref->flags = v & 0xff;
4275 }
4276 else
4277 {
4278 ref->isym = v & 0xffffff;
4279 ref->flags = (v >> 24) & 0xff;
4280 }
4281 }
4282 }
4283
4284 if (mdata->dysymtab)
4285 return FALSE;
4286 mdata->dysymtab = cmd;
4287
4288 return TRUE;
4289 }
4290
4291 static bfd_boolean
4292 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
4293 {
4294 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4295 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4296 struct mach_o_symtab_command_external raw;
4297
4298 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4299
4300 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4301 return FALSE;
4302
4303 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4304 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4305 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4306 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4307 symtab->symbols = NULL;
4308 symtab->strtab = NULL;
4309
4310 if (symtab->nsyms != 0)
4311 abfd->flags |= HAS_SYMS;
4312
4313 if (mdata->symtab)
4314 return FALSE;
4315 mdata->symtab = symtab;
4316 return TRUE;
4317 }
4318
4319 static bfd_boolean
4320 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4321 {
4322 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4323
4324 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4325
4326 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4327 return FALSE;
4328
4329 return TRUE;
4330 }
4331
4332 static bfd_boolean
4333 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4334 {
4335 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4336 struct mach_o_linkedit_data_command_external raw;
4337
4338 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4339 return FALSE;
4340
4341 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4342 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4343 return TRUE;
4344 }
4345
4346 static bfd_boolean
4347 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4348 {
4349 bfd_mach_o_str_command *cmd = &command->command.str;
4350 struct mach_o_str_command_external raw;
4351 unsigned long off;
4352
4353 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4354 return FALSE;
4355
4356 off = bfd_get_32 (abfd, raw.str);
4357 cmd->stroff = command->offset + off;
4358 cmd->str_len = command->len - off;
4359 cmd->str = bfd_alloc (abfd, cmd->str_len);
4360 if (cmd->str == NULL)
4361 return FALSE;
4362 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
4363 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
4364 return FALSE;
4365 return TRUE;
4366 }
4367
4368 static unsigned char *
4369 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size)
4370 {
4371 unsigned char *buf;
4372
4373 buf = bfd_alloc (abfd, size);
4374 if (buf == NULL)
4375 return NULL;
4376 if (bfd_seek (abfd, off, SEEK_SET) != 0
4377 || bfd_bread (buf, size, abfd) != size)
4378 return NULL;
4379 return buf;
4380 }
4381
4382 static bfd_boolean
4383 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4384 {
4385 /* Read rebase content. */
4386 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4387 {
4388 cmd->rebase_content =
4389 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4390 if (cmd->rebase_content == NULL)
4391 return FALSE;
4392 }
4393
4394 /* Read bind content. */
4395 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4396 {
4397 cmd->bind_content =
4398 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4399 if (cmd->bind_content == NULL)
4400 return FALSE;
4401 }
4402
4403 /* Read weak bind content. */
4404 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4405 {
4406 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4407 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4408 if (cmd->weak_bind_content == NULL)
4409 return FALSE;
4410 }
4411
4412 /* Read lazy bind content. */
4413 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4414 {
4415 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4416 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4417 if (cmd->lazy_bind_content == NULL)
4418 return FALSE;
4419 }
4420
4421 /* Read export content. */
4422 if (cmd->export_content == NULL && cmd->export_size != 0)
4423 {
4424 cmd->export_content = bfd_mach_o_alloc_and_read
4425 (abfd, cmd->export_off, cmd->export_size);
4426 if (cmd->export_content == NULL)
4427 return FALSE;
4428 }
4429
4430 return TRUE;
4431 }
4432
4433 static bfd_boolean
4434 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4435 {
4436 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4437 struct mach_o_dyld_info_command_external raw;
4438
4439 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4440 return FALSE;
4441
4442 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4443 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4444 cmd->rebase_content = NULL;
4445 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4446 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4447 cmd->bind_content = NULL;
4448 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4449 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4450 cmd->weak_bind_content = NULL;
4451 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4452 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4453 cmd->lazy_bind_content = NULL;
4454 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4455 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4456 cmd->export_content = NULL;
4457 return TRUE;
4458 }
4459
4460 static bfd_boolean
4461 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4462 {
4463 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4464 struct mach_o_version_min_command_external raw;
4465 unsigned int ver;
4466
4467 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4468 return FALSE;
4469
4470 ver = bfd_get_32 (abfd, raw.version);
4471 cmd->rel = ver >> 16;
4472 cmd->maj = ver >> 8;
4473 cmd->min = ver;
4474 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
4475 return TRUE;
4476 }
4477
4478 static bfd_boolean
4479 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4480 {
4481 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4482 struct mach_o_encryption_info_command_external raw;
4483
4484 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4485 return FALSE;
4486
4487 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4488 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4489 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4490 return TRUE;
4491 }
4492
4493 static bfd_boolean
4494 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4495 {
4496 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4497 struct mach_o_encryption_info_64_command_external raw;
4498
4499 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4500 return FALSE;
4501
4502 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4503 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4504 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4505 return TRUE;
4506 }
4507
4508 static bfd_boolean
4509 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4510 {
4511 bfd_mach_o_main_command *cmd = &command->command.main;
4512 struct mach_o_entry_point_command_external raw;
4513
4514 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4515 return FALSE;
4516
4517 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4518 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4519 return TRUE;
4520 }
4521
4522 static bfd_boolean
4523 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4524 {
4525 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4526 struct mach_o_source_version_command_external raw;
4527 bfd_uint64_t ver;
4528
4529 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4530 return FALSE;
4531
4532 ver = bfd_get_64 (abfd, raw.version);
4533 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4534 generates warnings) in case of the host doesn't support 64 bit
4535 integers. */
4536 cmd->e = ver & 0x3ff;
4537 ver >>= 10;
4538 cmd->d = ver & 0x3ff;
4539 ver >>= 10;
4540 cmd->c = ver & 0x3ff;
4541 ver >>= 10;
4542 cmd->b = ver & 0x3ff;
4543 ver >>= 10;
4544 cmd->a = ver & 0xffffff;
4545 return TRUE;
4546 }
4547
4548 static bfd_boolean
4549 bfd_mach_o_read_segment (bfd *abfd,
4550 bfd_mach_o_load_command *command,
4551 unsigned int wide)
4552 {
4553 bfd_mach_o_segment_command *seg = &command->command.segment;
4554 unsigned long i;
4555
4556 if (wide)
4557 {
4558 struct mach_o_segment_command_64_external raw;
4559
4560 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4561
4562 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4563 return FALSE;
4564
4565 memcpy (seg->segname, raw.segname, 16);
4566 seg->segname[16] = '\0';
4567
4568 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4569 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4570 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4571 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4572 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4573 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4574 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4575 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4576 }
4577 else
4578 {
4579 struct mach_o_segment_command_32_external raw;
4580
4581 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4582
4583 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4584 return FALSE;
4585
4586 memcpy (seg->segname, raw.segname, 16);
4587 seg->segname[16] = '\0';
4588
4589 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4590 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4591 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4592 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4593 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4594 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4595 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4596 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4597 }
4598 seg->sect_head = NULL;
4599 seg->sect_tail = NULL;
4600
4601 for (i = 0; i < seg->nsects; i++)
4602 {
4603 asection *sec;
4604
4605 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4606 if (sec == NULL)
4607 return FALSE;
4608
4609 bfd_mach_o_append_section_to_segment
4610 (seg, bfd_mach_o_get_mach_o_section (sec));
4611 }
4612
4613 return TRUE;
4614 }
4615
4616 static bfd_boolean
4617 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4618 {
4619 return bfd_mach_o_read_segment (abfd, command, 0);
4620 }
4621
4622 static bfd_boolean
4623 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4624 {
4625 return bfd_mach_o_read_segment (abfd, command, 1);
4626 }
4627
4628 static bfd_boolean
4629 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
4630 {
4631 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4632 struct mach_o_load_command_external raw;
4633 unsigned int cmd;
4634
4635 /* Read command type and length. */
4636 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4637 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4638 return FALSE;
4639
4640 cmd = bfd_h_get_32 (abfd, raw.cmd);
4641 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4642 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
4643 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4644
4645 switch (command->type)
4646 {
4647 case BFD_MACH_O_LC_SEGMENT:
4648 if (!bfd_mach_o_read_segment_32 (abfd, command))
4649 return FALSE;
4650 break;
4651 case BFD_MACH_O_LC_SEGMENT_64:
4652 if (!bfd_mach_o_read_segment_64 (abfd, command))
4653 return FALSE;
4654 break;
4655 case BFD_MACH_O_LC_SYMTAB:
4656 if (!bfd_mach_o_read_symtab (abfd, command))
4657 return FALSE;
4658 break;
4659 case BFD_MACH_O_LC_SYMSEG:
4660 break;
4661 case BFD_MACH_O_LC_THREAD:
4662 case BFD_MACH_O_LC_UNIXTHREAD:
4663 if (!bfd_mach_o_read_thread (abfd, command))
4664 return FALSE;
4665 break;
4666 case BFD_MACH_O_LC_LOAD_DYLINKER:
4667 case BFD_MACH_O_LC_ID_DYLINKER:
4668 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4669 if (!bfd_mach_o_read_dylinker (abfd, command))
4670 return FALSE;
4671 break;
4672 case BFD_MACH_O_LC_LOAD_DYLIB:
4673 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4674 case BFD_MACH_O_LC_ID_DYLIB:
4675 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4676 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4677 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4678 if (!bfd_mach_o_read_dylib (abfd, command))
4679 return FALSE;
4680 break;
4681 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4682 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4683 return FALSE;
4684 break;
4685 case BFD_MACH_O_LC_LOADFVMLIB:
4686 case BFD_MACH_O_LC_IDFVMLIB:
4687 if (!bfd_mach_o_read_fvmlib (abfd, command))
4688 return FALSE;
4689 break;
4690 case BFD_MACH_O_LC_IDENT:
4691 case BFD_MACH_O_LC_FVMFILE:
4692 case BFD_MACH_O_LC_PREPAGE:
4693 case BFD_MACH_O_LC_ROUTINES:
4694 case BFD_MACH_O_LC_ROUTINES_64:
4695 break;
4696 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4697 case BFD_MACH_O_LC_SUB_UMBRELLA:
4698 case BFD_MACH_O_LC_SUB_LIBRARY:
4699 case BFD_MACH_O_LC_SUB_CLIENT:
4700 case BFD_MACH_O_LC_RPATH:
4701 if (!bfd_mach_o_read_str (abfd, command))
4702 return FALSE;
4703 break;
4704 case BFD_MACH_O_LC_DYSYMTAB:
4705 if (!bfd_mach_o_read_dysymtab (abfd, command))
4706 return FALSE;
4707 break;
4708 case BFD_MACH_O_LC_PREBIND_CKSUM:
4709 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
4710 return FALSE;
4711 break;
4712 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
4713 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
4714 return FALSE;
4715 break;
4716 case BFD_MACH_O_LC_UUID:
4717 if (!bfd_mach_o_read_uuid (abfd, command))
4718 return FALSE;
4719 break;
4720 case BFD_MACH_O_LC_CODE_SIGNATURE:
4721 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
4722 case BFD_MACH_O_LC_FUNCTION_STARTS:
4723 case BFD_MACH_O_LC_DATA_IN_CODE:
4724 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
4725 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
4726 if (!bfd_mach_o_read_linkedit (abfd, command))
4727 return FALSE;
4728 break;
4729 case BFD_MACH_O_LC_ENCRYPTION_INFO:
4730 if (!bfd_mach_o_read_encryption_info (abfd, command))
4731 return FALSE;
4732 break;
4733 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
4734 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
4735 return FALSE;
4736 break;
4737 case BFD_MACH_O_LC_DYLD_INFO:
4738 if (!bfd_mach_o_read_dyld_info (abfd, command))
4739 return FALSE;
4740 break;
4741 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
4742 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
4743 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
4744 if (!bfd_mach_o_read_version_min (abfd, command))
4745 return FALSE;
4746 break;
4747 case BFD_MACH_O_LC_MAIN:
4748 if (!bfd_mach_o_read_main (abfd, command))
4749 return FALSE;
4750 break;
4751 case BFD_MACH_O_LC_SOURCE_VERSION:
4752 if (!bfd_mach_o_read_source_version (abfd, command))
4753 return FALSE;
4754 break;
4755 default:
4756 command->len = 0;
4757 _bfd_error_handler (_("%pB: unknown load command %#x"),
4758 abfd, command->type);
4759 return FALSE;
4760 }
4761
4762 return TRUE;
4763 }
4764
4765 static void
4766 bfd_mach_o_flatten_sections (bfd *abfd)
4767 {
4768 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4769 bfd_mach_o_load_command *cmd;
4770 long csect = 0;
4771
4772 /* Count total number of sections. */
4773 mdata->nsects = 0;
4774
4775 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4776 {
4777 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4778 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4779 {
4780 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4781
4782 mdata->nsects += seg->nsects;
4783 }
4784 }
4785
4786 /* Allocate sections array. */
4787 mdata->sections = bfd_alloc2 (abfd,
4788 mdata->nsects, sizeof (bfd_mach_o_section *));
4789
4790 /* Fill the array. */
4791 csect = 0;
4792
4793 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4794 {
4795 if (cmd->type == BFD_MACH_O_LC_SEGMENT
4796 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
4797 {
4798 bfd_mach_o_segment_command *seg = &cmd->command.segment;
4799 bfd_mach_o_section *sec;
4800
4801 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4802
4803 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4804 mdata->sections[csect++] = sec;
4805 }
4806 }
4807 }
4808
4809 static bfd_boolean
4810 bfd_mach_o_scan_start_address (bfd *abfd)
4811 {
4812 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4813 bfd_mach_o_thread_command *thr = NULL;
4814 bfd_mach_o_load_command *cmd;
4815 unsigned long i;
4816
4817 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
4818 if (cmd->type == BFD_MACH_O_LC_THREAD
4819 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
4820 {
4821 thr = &cmd->command.thread;
4822 break;
4823 }
4824 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
4825 {
4826 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
4827 bfd_mach_o_section *text_sect = mdata->sections[0];
4828
4829 if (text_sect)
4830 {
4831 abfd->start_address = main_cmd->entryoff
4832 + (text_sect->addr - text_sect->offset);
4833 return TRUE;
4834 }
4835 }
4836
4837 /* An object file has no start address, so do not fail if not found. */
4838 if (thr == NULL)
4839 return TRUE;
4840
4841 /* FIXME: create a subtarget hook ? */
4842 for (i = 0; i < thr->nflavours; i++)
4843 {
4844 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4845 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
4846 {
4847 unsigned char buf[4];
4848
4849 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
4850 || bfd_bread (buf, 4, abfd) != 4)
4851 return FALSE;
4852
4853 abfd->start_address = bfd_h_get_32 (abfd, buf);
4854 }
4855 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4856 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4857 {
4858 unsigned char buf[4];
4859
4860 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4861 || bfd_bread (buf, 4, abfd) != 4)
4862 return FALSE;
4863
4864 abfd->start_address = bfd_h_get_32 (abfd, buf);
4865 }
4866 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4867 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4868 {
4869 unsigned char buf[8];
4870
4871 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
4872 || bfd_bread (buf, 8, abfd) != 8)
4873 return FALSE;
4874
4875 abfd->start_address = bfd_h_get_64 (abfd, buf);
4876 }
4877 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4878 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4879 {
4880 unsigned char buf[8];
4881
4882 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4883 || bfd_bread (buf, 8, abfd) != 8)
4884 return FALSE;
4885
4886 abfd->start_address = bfd_h_get_64 (abfd, buf);
4887 }
4888 }
4889
4890 return TRUE;
4891 }
4892
4893 bfd_boolean
4894 bfd_mach_o_set_arch_mach (bfd *abfd,
4895 enum bfd_architecture arch,
4896 unsigned long machine)
4897 {
4898 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4899
4900 /* If this isn't the right architecture for this backend, and this
4901 isn't the generic backend, fail. */
4902 if (arch != bed->arch
4903 && arch != bfd_arch_unknown
4904 && bed->arch != bfd_arch_unknown)
4905 return FALSE;
4906
4907 return bfd_default_set_arch_mach (abfd, arch, machine);
4908 }
4909
4910 static bfd_boolean
4911 bfd_mach_o_scan (bfd *abfd,
4912 bfd_mach_o_header *header,
4913 bfd_mach_o_data_struct *mdata)
4914 {
4915 unsigned int i;
4916 enum bfd_architecture cputype;
4917 unsigned long cpusubtype;
4918 unsigned int hdrsize;
4919
4920 hdrsize = mach_o_wide_p (header) ?
4921 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4922
4923 mdata->header = *header;
4924
4925 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4926 switch (header->filetype)
4927 {
4928 case BFD_MACH_O_MH_OBJECT:
4929 abfd->flags |= HAS_RELOC;
4930 break;
4931 case BFD_MACH_O_MH_EXECUTE:
4932 abfd->flags |= EXEC_P;
4933 break;
4934 case BFD_MACH_O_MH_DYLIB:
4935 case BFD_MACH_O_MH_BUNDLE:
4936 abfd->flags |= DYNAMIC;
4937 break;
4938 }
4939
4940 abfd->tdata.mach_o_data = mdata;
4941
4942 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4943 &cputype, &cpusubtype);
4944 if (cputype == bfd_arch_unknown)
4945 {
4946 _bfd_error_handler
4947 /* xgettext:c-format */
4948 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4949 header->cputype, header->cpusubtype);
4950 return FALSE;
4951 }
4952
4953 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4954
4955 if (header->ncmds != 0)
4956 {
4957 bfd_mach_o_load_command *cmd;
4958
4959 mdata->first_command = NULL;
4960 mdata->last_command = NULL;
4961
4962 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command));
4963 if (cmd == NULL)
4964 return FALSE;
4965
4966 for (i = 0; i < header->ncmds; i++)
4967 {
4968 bfd_mach_o_load_command *cur = &cmd[i];
4969
4970 bfd_mach_o_append_command (abfd, cur);
4971
4972 if (i == 0)
4973 cur->offset = hdrsize;
4974 else
4975 {
4976 bfd_mach_o_load_command *prev = &cmd[i - 1];
4977 cur->offset = prev->offset + prev->len;
4978 }
4979
4980 if (!bfd_mach_o_read_command (abfd, cur))
4981 return FALSE;
4982 }
4983 }
4984
4985 /* Sections should be flatten before scanning start address. */
4986 bfd_mach_o_flatten_sections (abfd);
4987 if (!bfd_mach_o_scan_start_address (abfd))
4988 return FALSE;
4989
4990 return TRUE;
4991 }
4992
4993 bfd_boolean
4994 bfd_mach_o_mkobject_init (bfd *abfd)
4995 {
4996 bfd_mach_o_data_struct *mdata = NULL;
4997
4998 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4999 if (mdata == NULL)
5000 return FALSE;
5001 abfd->tdata.mach_o_data = mdata;
5002
5003 mdata->header.magic = 0;
5004 mdata->header.cputype = 0;
5005 mdata->header.cpusubtype = 0;
5006 mdata->header.filetype = 0;
5007 mdata->header.ncmds = 0;
5008 mdata->header.sizeofcmds = 0;
5009 mdata->header.flags = 0;
5010 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5011 mdata->first_command = NULL;
5012 mdata->last_command = NULL;
5013 mdata->nsects = 0;
5014 mdata->sections = NULL;
5015 mdata->dyn_reloc_cache = NULL;
5016
5017 return TRUE;
5018 }
5019
5020 static bfd_boolean
5021 bfd_mach_o_gen_mkobject (bfd *abfd)
5022 {
5023 bfd_mach_o_data_struct *mdata;
5024
5025 if (!bfd_mach_o_mkobject_init (abfd))
5026 return FALSE;
5027
5028 mdata = bfd_mach_o_get_data (abfd);
5029 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5030 mdata->header.cputype = 0;
5031 mdata->header.cpusubtype = 0;
5032 mdata->header.byteorder = abfd->xvec->byteorder;
5033 mdata->header.version = 1;
5034
5035 return TRUE;
5036 }
5037
5038 const bfd_target *
5039 bfd_mach_o_header_p (bfd *abfd,
5040 file_ptr hdr_off,
5041 bfd_mach_o_filetype filetype,
5042 bfd_mach_o_cpu_type cputype)
5043 {
5044 bfd_mach_o_header header;
5045 bfd_mach_o_data_struct *mdata;
5046
5047 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5048 goto wrong;
5049
5050 if (! (header.byteorder == BFD_ENDIAN_BIG
5051 || header.byteorder == BFD_ENDIAN_LITTLE))
5052 {
5053 _bfd_error_handler (_("unknown header byte-order value %#x"),
5054 header.byteorder);
5055 goto wrong;
5056 }
5057
5058 if (! ((header.byteorder == BFD_ENDIAN_BIG
5059 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5060 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5061 || (header.byteorder == BFD_ENDIAN_LITTLE
5062 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5063 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5064 goto wrong;
5065
5066 /* Check cputype and filetype.
5067 In case of wildcard, do not accept magics that are handled by existing
5068 targets. */
5069 if (cputype)
5070 {
5071 if (header.cputype != cputype)
5072 goto wrong;
5073 }
5074 else
5075 {
5076 #ifndef BFD64
5077 /* Do not recognize 64 architectures if not configured for 64bit targets.
5078 This could happen only for generic targets. */
5079 if (mach_o_wide_p (&header))
5080 goto wrong;
5081 #endif
5082 }
5083
5084 if (filetype)
5085 {
5086 if (header.filetype != filetype)
5087 goto wrong;
5088 }
5089 else
5090 {
5091 switch (header.filetype)
5092 {
5093 case BFD_MACH_O_MH_CORE:
5094 /* Handled by core_p */
5095 goto wrong;
5096 default:
5097 break;
5098 }
5099 }
5100
5101 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5102 if (mdata == NULL)
5103 goto fail;
5104 mdata->hdr_offset = hdr_off;
5105
5106 if (!bfd_mach_o_scan (abfd, &header, mdata))
5107 goto wrong;
5108
5109 return abfd->xvec;
5110
5111 wrong:
5112 bfd_set_error (bfd_error_wrong_format);
5113
5114 fail:
5115 return NULL;
5116 }
5117
5118 static const bfd_target *
5119 bfd_mach_o_gen_object_p (bfd *abfd)
5120 {
5121 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5122 }
5123
5124 static const bfd_target *
5125 bfd_mach_o_gen_core_p (bfd *abfd)
5126 {
5127 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5128 }
5129
5130 /* Return the base address of ABFD, ie the address at which the image is
5131 mapped. The possible initial pagezero is ignored. */
5132
5133 bfd_vma
5134 bfd_mach_o_get_base_address (bfd *abfd)
5135 {
5136 bfd_mach_o_data_struct *mdata;
5137 bfd_mach_o_load_command *cmd;
5138
5139 /* Check for Mach-O. */
5140 if (!bfd_mach_o_valid (abfd))
5141 return 0;
5142 mdata = bfd_mach_o_get_data (abfd);
5143
5144 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5145 {
5146 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5147 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5148 {
5149 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5150
5151 if (segcmd->initprot != 0)
5152 return segcmd->vmaddr;
5153 }
5154 }
5155 return 0;
5156 }
5157
5158 typedef struct mach_o_fat_archentry
5159 {
5160 unsigned long cputype;
5161 unsigned long cpusubtype;
5162 unsigned long offset;
5163 unsigned long size;
5164 unsigned long align;
5165 } mach_o_fat_archentry;
5166
5167 typedef struct mach_o_fat_data_struct
5168 {
5169 unsigned long magic;
5170 unsigned long nfat_arch;
5171 mach_o_fat_archentry *archentries;
5172 } mach_o_fat_data_struct;
5173
5174 const bfd_target *
5175 bfd_mach_o_fat_archive_p (bfd *abfd)
5176 {
5177 mach_o_fat_data_struct *adata = NULL;
5178 struct mach_o_fat_header_external hdr;
5179 unsigned long i;
5180
5181 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5182 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5183 goto error;
5184
5185 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5186 if (adata == NULL)
5187 goto error;
5188
5189 adata->magic = bfd_getb32 (hdr.magic);
5190 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5191 if (adata->magic != 0xcafebabe)
5192 goto error;
5193 /* Avoid matching Java bytecode files, which have the same magic number.
5194 In the Java bytecode file format this field contains the JVM version,
5195 which starts at 43.0. */
5196 if (adata->nfat_arch > 30)
5197 goto error;
5198
5199 adata->archentries =
5200 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry));
5201 if (adata->archentries == NULL)
5202 goto error;
5203
5204 for (i = 0; i < adata->nfat_arch; i++)
5205 {
5206 struct mach_o_fat_arch_external arch;
5207 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5208 goto error;
5209 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5210 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5211 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5212 adata->archentries[i].size = bfd_getb32 (arch.size);
5213 adata->archentries[i].align = bfd_getb32 (arch.align);
5214 }
5215
5216 abfd->tdata.mach_o_fat_data = adata;
5217
5218 return abfd->xvec;
5219
5220 error:
5221 if (adata != NULL)
5222 bfd_release (abfd, adata);
5223 bfd_set_error (bfd_error_wrong_format);
5224 return NULL;
5225 }
5226
5227 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5228 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5229 Set arelt_data and origin fields too. */
5230
5231 static void
5232 bfd_mach_o_fat_member_init (bfd *abfd,
5233 enum bfd_architecture arch_type,
5234 unsigned long arch_subtype,
5235 mach_o_fat_archentry *entry)
5236 {
5237 struct areltdata *areltdata;
5238 /* Create the member filename. Use ARCH_NAME. */
5239 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5240
5241 if (ap)
5242 {
5243 /* Use the architecture name if known. */
5244 abfd->filename = xstrdup (ap->printable_name);
5245 }
5246 else
5247 {
5248 /* Forge a uniq id. */
5249 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
5250 char *name = xmalloc (namelen);
5251 snprintf (name, namelen, "0x%lx-0x%lx",
5252 entry->cputype, entry->cpusubtype);
5253 abfd->filename = name;
5254 }
5255
5256 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5257 areltdata->parsed_size = entry->size;
5258 abfd->arelt_data = areltdata;
5259 abfd->iostream = NULL;
5260 abfd->origin = entry->offset;
5261 }
5262
5263 bfd *
5264 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5265 {
5266 mach_o_fat_data_struct *adata;
5267 mach_o_fat_archentry *entry = NULL;
5268 unsigned long i;
5269 bfd *nbfd;
5270 enum bfd_architecture arch_type;
5271 unsigned long arch_subtype;
5272
5273 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5274 BFD_ASSERT (adata != NULL);
5275
5276 /* Find index of previous entry. */
5277 if (prev == NULL)
5278 {
5279 /* Start at first one. */
5280 i = 0;
5281 }
5282 else
5283 {
5284 /* Find index of PREV. */
5285 for (i = 0; i < adata->nfat_arch; i++)
5286 {
5287 if (adata->archentries[i].offset == prev->origin)
5288 break;
5289 }
5290
5291 if (i == adata->nfat_arch)
5292 {
5293 /* Not found. */
5294 bfd_set_error (bfd_error_bad_value);
5295 return NULL;
5296 }
5297
5298 /* Get next entry. */
5299 i++;
5300 }
5301
5302 if (i >= adata->nfat_arch)
5303 {
5304 bfd_set_error (bfd_error_no_more_archived_files);
5305 return NULL;
5306 }
5307
5308 entry = &adata->archentries[i];
5309 nbfd = _bfd_new_bfd_contained_in (archive);
5310 if (nbfd == NULL)
5311 return NULL;
5312
5313 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5314 &arch_type, &arch_subtype);
5315
5316 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
5317
5318 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5319
5320 return nbfd;
5321 }
5322
5323 /* Analogous to stat call. */
5324
5325 static int
5326 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5327 {
5328 if (abfd->arelt_data == NULL)
5329 {
5330 bfd_set_error (bfd_error_invalid_operation);
5331 return -1;
5332 }
5333
5334 buf->st_mtime = 0;
5335 buf->st_uid = 0;
5336 buf->st_gid = 0;
5337 buf->st_mode = 0644;
5338 buf->st_size = arelt_size (abfd);
5339
5340 return 0;
5341 }
5342
5343 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5344 If ABFD is a fat image containing a member that corresponds to FORMAT
5345 and ARCH, returns it.
5346 In other case, returns NULL.
5347 This function allows transparent uses of fat images. */
5348
5349 bfd *
5350 bfd_mach_o_fat_extract (bfd *abfd,
5351 bfd_format format,
5352 const bfd_arch_info_type *arch)
5353 {
5354 bfd *res;
5355 mach_o_fat_data_struct *adata;
5356 unsigned int i;
5357
5358 if (bfd_check_format (abfd, format))
5359 {
5360 if (bfd_get_arch_info (abfd) == arch)
5361 return abfd;
5362 return NULL;
5363 }
5364 if (!bfd_check_format (abfd, bfd_archive)
5365 || abfd->xvec != &mach_o_fat_vec)
5366 return NULL;
5367
5368 /* This is a Mach-O fat image. */
5369 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5370 BFD_ASSERT (adata != NULL);
5371
5372 for (i = 0; i < adata->nfat_arch; i++)
5373 {
5374 struct mach_o_fat_archentry *e = &adata->archentries[i];
5375 enum bfd_architecture cpu_type;
5376 unsigned long cpu_subtype;
5377
5378 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5379 &cpu_type, &cpu_subtype);
5380 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5381 continue;
5382
5383 /* The architecture is found. */
5384 res = _bfd_new_bfd_contained_in (abfd);
5385 if (res == NULL)
5386 return NULL;
5387
5388 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
5389
5390 if (bfd_check_format (res, format))
5391 {
5392 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5393 return res;
5394 }
5395 bfd_close (res);
5396 return NULL;
5397 }
5398
5399 return NULL;
5400 }
5401
5402 int
5403 bfd_mach_o_lookup_command (bfd *abfd,
5404 bfd_mach_o_load_command_type type,
5405 bfd_mach_o_load_command **mcommand)
5406 {
5407 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5408 struct bfd_mach_o_load_command *cmd;
5409 unsigned int num;
5410
5411 BFD_ASSERT (mdata != NULL);
5412 BFD_ASSERT (mcommand != NULL);
5413
5414 num = 0;
5415 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5416 {
5417 if (cmd->type != type)
5418 continue;
5419
5420 if (num == 0)
5421 *mcommand = cmd;
5422 num++;
5423 }
5424
5425 return num;
5426 }
5427
5428 unsigned long
5429 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5430 {
5431 switch (type)
5432 {
5433 case BFD_MACH_O_CPU_TYPE_MC680x0:
5434 return 0x04000000;
5435 case BFD_MACH_O_CPU_TYPE_POWERPC:
5436 return 0xc0000000;
5437 case BFD_MACH_O_CPU_TYPE_I386:
5438 return 0xc0000000;
5439 case BFD_MACH_O_CPU_TYPE_SPARC:
5440 return 0xf0000000;
5441 case BFD_MACH_O_CPU_TYPE_HPPA:
5442 return 0xc0000000 - 0x04000000;
5443 default:
5444 return 0;
5445 }
5446 }
5447
5448 /* The following two tables should be kept, as far as possible, in order of
5449 most frequently used entries to optimize their use from gas. */
5450
5451 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5452 {
5453 { "regular", BFD_MACH_O_S_REGULAR},
5454 { "coalesced", BFD_MACH_O_S_COALESCED},
5455 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5456 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5457 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5458 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5459 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5460 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5461 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5462 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5463 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5464 { "interposing", BFD_MACH_O_S_INTERPOSING},
5465 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5466 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5467 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5468 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5469 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5470 { NULL, 0}
5471 };
5472
5473 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5474 {
5475 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5476 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5477 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5478 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5479 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5480 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5481 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5482 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5483 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5484 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5485 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5486 { NULL, 0}
5487 };
5488
5489 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5490
5491 unsigned int
5492 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5493 {
5494 const bfd_mach_o_xlat_name *x;
5495 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5496
5497 for (x = bfd_mach_o_section_type_name; x->name; x++)
5498 if (strcmp (x->name, name) == 0)
5499 {
5500 /* We found it... does the target support it? */
5501 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5502 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5503 return x->val; /* OK. */
5504 else
5505 break; /* Not supported. */
5506 }
5507 /* Maximum section ID = 0xff. */
5508 return 256;
5509 }
5510
5511 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5512
5513 unsigned int
5514 bfd_mach_o_get_section_attribute_from_name (const char *name)
5515 {
5516 const bfd_mach_o_xlat_name *x;
5517
5518 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5519 if (strcmp (x->name, name) == 0)
5520 return x->val;
5521 return (unsigned int)-1;
5522 }
5523
5524 int
5525 bfd_mach_o_core_fetch_environment (bfd *abfd,
5526 unsigned char **rbuf,
5527 unsigned int *rlen)
5528 {
5529 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5530 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5531 bfd_mach_o_load_command *cmd;
5532
5533 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5534 {
5535 bfd_mach_o_segment_command *seg;
5536
5537 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5538 continue;
5539
5540 seg = &cmd->command.segment;
5541
5542 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5543 {
5544 unsigned long start = seg->fileoff;
5545 unsigned long end = seg->fileoff + seg->filesize;
5546 unsigned char *buf = bfd_malloc (1024);
5547 unsigned long size = 1024;
5548
5549 for (;;)
5550 {
5551 bfd_size_type nread = 0;
5552 unsigned long offset;
5553 int found_nonnull = 0;
5554
5555 if (size > (end - start))
5556 size = (end - start);
5557
5558 buf = bfd_realloc_or_free (buf, size);
5559 if (buf == NULL)
5560 return -1;
5561
5562 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5563 {
5564 free (buf);
5565 return -1;
5566 }
5567
5568 nread = bfd_bread (buf, size, abfd);
5569
5570 if (nread != size)
5571 {
5572 free (buf);
5573 return -1;
5574 }
5575
5576 for (offset = 4; offset <= size; offset += 4)
5577 {
5578 unsigned long val;
5579
5580 val = *((unsigned long *) (buf + size - offset));
5581 if (! found_nonnull)
5582 {
5583 if (val != 0)
5584 found_nonnull = 1;
5585 }
5586 else if (val == 0x0)
5587 {
5588 unsigned long bottom;
5589 unsigned long top;
5590
5591 bottom = seg->fileoff + seg->filesize - offset;
5592 top = seg->fileoff + seg->filesize - 4;
5593 *rbuf = bfd_malloc (top - bottom);
5594 *rlen = top - bottom;
5595
5596 memcpy (*rbuf, buf + size - *rlen, *rlen);
5597 free (buf);
5598 return 0;
5599 }
5600 }
5601
5602 if (size == (end - start))
5603 break;
5604
5605 size *= 2;
5606 }
5607
5608 free (buf);
5609 }
5610 }
5611
5612 return -1;
5613 }
5614
5615 char *
5616 bfd_mach_o_core_file_failing_command (bfd *abfd)
5617 {
5618 unsigned char *buf = NULL;
5619 unsigned int len = 0;
5620 int ret;
5621
5622 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5623 if (ret < 0)
5624 return NULL;
5625
5626 return (char *) buf;
5627 }
5628
5629 int
5630 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5631 {
5632 return 0;
5633 }
5634
5635 static bfd_mach_o_uuid_command *
5636 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5637 {
5638 bfd_mach_o_load_command *uuid_cmd = NULL;
5639 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5640 if (ncmd != 1 || uuid_cmd == NULL)
5641 return FALSE;
5642 return &uuid_cmd->command.uuid;
5643 }
5644
5645 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
5646
5647 static bfd_boolean
5648 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
5649 {
5650 bfd_mach_o_uuid_command *dsym_uuid_cmd;
5651
5652 BFD_ASSERT (abfd);
5653 BFD_ASSERT (uuid_cmd);
5654
5655 if (!bfd_check_format (abfd, bfd_object))
5656 return FALSE;
5657
5658 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
5659 || bfd_mach_o_get_data (abfd) == NULL
5660 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
5661 return FALSE;
5662
5663 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5664 if (dsym_uuid_cmd == NULL)
5665 return FALSE;
5666
5667 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
5668 sizeof (uuid_cmd->uuid)) != 0)
5669 return FALSE;
5670
5671 return TRUE;
5672 }
5673
5674 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
5675 The caller is responsible for closing the returned BFD object and
5676 its my_archive if the returned BFD is in a fat dSYM. */
5677
5678 static bfd *
5679 bfd_mach_o_find_dsym (const char *dsym_filename,
5680 const bfd_mach_o_uuid_command *uuid_cmd,
5681 const bfd_arch_info_type *arch)
5682 {
5683 bfd *base_dsym_bfd, *dsym_bfd;
5684
5685 BFD_ASSERT (uuid_cmd);
5686
5687 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
5688 if (base_dsym_bfd == NULL)
5689 return NULL;
5690
5691 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
5692 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
5693 return dsym_bfd;
5694
5695 bfd_close (dsym_bfd);
5696 if (base_dsym_bfd != dsym_bfd)
5697 bfd_close (base_dsym_bfd);
5698
5699 return NULL;
5700 }
5701
5702 /* Return a BFD created from a dSYM file for ABFD.
5703 The caller is responsible for closing the returned BFD object, its
5704 filename, and its my_archive if the returned BFD is in a fat dSYM. */
5705
5706 static bfd *
5707 bfd_mach_o_follow_dsym (bfd *abfd)
5708 {
5709 char *dsym_filename;
5710 bfd_mach_o_uuid_command *uuid_cmd;
5711 bfd *dsym_bfd, *base_bfd = abfd;
5712 const char *base_basename;
5713
5714 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
5715 return NULL;
5716
5717 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
5718 base_bfd = abfd->my_archive;
5719 /* BFD may have been opened from a stream. */
5720 if (base_bfd->filename == NULL)
5721 {
5722 bfd_set_error (bfd_error_invalid_operation);
5723 return NULL;
5724 }
5725 base_basename = lbasename (base_bfd->filename);
5726
5727 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
5728 if (uuid_cmd == NULL)
5729 return NULL;
5730
5731 /* TODO: We assume the DWARF file has the same as the binary's.
5732 It seems apple's GDB checks all files in the dSYM bundle directory.
5733 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
5734 */
5735 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
5736 + strlen (dsym_subdir) + 1
5737 + strlen (base_basename) + 1);
5738 sprintf (dsym_filename, "%s%s/%s",
5739 base_bfd->filename, dsym_subdir, base_basename);
5740
5741 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
5742 bfd_get_arch_info (abfd));
5743 if (dsym_bfd == NULL)
5744 free (dsym_filename);
5745
5746 return dsym_bfd;
5747 }
5748
5749 bfd_boolean
5750 bfd_mach_o_find_nearest_line (bfd *abfd,
5751 asymbol **symbols,
5752 asection *section,
5753 bfd_vma offset,
5754 const char **filename_ptr,
5755 const char **functionname_ptr,
5756 unsigned int *line_ptr,
5757 unsigned int *discriminator_ptr)
5758 {
5759 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5760 if (mdata == NULL)
5761 return FALSE;
5762 switch (mdata->header.filetype)
5763 {
5764 case BFD_MACH_O_MH_OBJECT:
5765 break;
5766 case BFD_MACH_O_MH_EXECUTE:
5767 case BFD_MACH_O_MH_DYLIB:
5768 case BFD_MACH_O_MH_BUNDLE:
5769 case BFD_MACH_O_MH_KEXT_BUNDLE:
5770 if (mdata->dwarf2_find_line_info == NULL)
5771 {
5772 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5773 /* When we couldn't find dSYM for this binary, we look for
5774 the debug information in the binary itself. In this way,
5775 we won't try finding separated dSYM again because
5776 mdata->dwarf2_find_line_info will be filled. */
5777 if (! mdata->dsym_bfd)
5778 break;
5779 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5780 dwarf_debug_sections, symbols,
5781 &mdata->dwarf2_find_line_info,
5782 FALSE))
5783 return FALSE;
5784 }
5785 break;
5786 default:
5787 return FALSE;
5788 }
5789 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
5790 filename_ptr, functionname_ptr,
5791 line_ptr, discriminator_ptr,
5792 dwarf_debug_sections, 0,
5793 &mdata->dwarf2_find_line_info);
5794 }
5795
5796 bfd_boolean
5797 bfd_mach_o_close_and_cleanup (bfd *abfd)
5798 {
5799 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5800 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5801 {
5802 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5803 bfd_mach_o_free_cached_info (abfd);
5804 if (mdata->dsym_bfd != NULL)
5805 {
5806 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5807 #if 0
5808 /* FIXME: PR 19435: This calculation to find the memory allocated by
5809 bfd_mach_o_follow_dsym for the filename does not always end up
5810 selecting the correct pointer. Unfortunately this problem is
5811 very hard to reproduce on a non Mach-O native system, so until it
5812 can be traced and fixed on such a system, this code will remain
5813 commented out. This does mean that there will be a memory leak,
5814 but it is small, and happens when we are closing down, so it
5815 should not matter too much. */
5816 char *dsym_filename = (char *)(fat_bfd
5817 ? fat_bfd->filename
5818 : mdata->dsym_bfd->filename);
5819 #endif
5820 bfd_close (mdata->dsym_bfd);
5821 mdata->dsym_bfd = NULL;
5822 if (fat_bfd)
5823 bfd_close (fat_bfd);
5824 #if 0
5825 free (dsym_filename);
5826 #endif
5827 }
5828 }
5829
5830 return _bfd_generic_close_and_cleanup (abfd);
5831 }
5832
5833 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5834 {
5835 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5836 asection *asect;
5837 free (mdata->dyn_reloc_cache);
5838 mdata->dyn_reloc_cache = NULL;
5839 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5840 {
5841 free (asect->relocation);
5842 asect->relocation = NULL;
5843 }
5844
5845 return TRUE;
5846 }
5847
5848 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5849 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5850
5851 #define bfd_mach_o_canonicalize_one_reloc NULL
5852 #define bfd_mach_o_swap_reloc_out NULL
5853 #define bfd_mach_o_print_thread NULL
5854 #define bfd_mach_o_tgt_seg_table NULL
5855 #define bfd_mach_o_section_type_valid_for_tgt NULL
5856
5857 #define TARGET_NAME mach_o_be_vec
5858 #define TARGET_STRING "mach-o-be"
5859 #define TARGET_ARCHITECTURE bfd_arch_unknown
5860 #define TARGET_PAGESIZE 1
5861 #define TARGET_BIG_ENDIAN 1
5862 #define TARGET_ARCHIVE 0
5863 #define TARGET_PRIORITY 1
5864 #include "mach-o-target.c"
5865
5866 #undef TARGET_NAME
5867 #undef TARGET_STRING
5868 #undef TARGET_ARCHITECTURE
5869 #undef TARGET_PAGESIZE
5870 #undef TARGET_BIG_ENDIAN
5871 #undef TARGET_ARCHIVE
5872 #undef TARGET_PRIORITY
5873
5874 #define TARGET_NAME mach_o_le_vec
5875 #define TARGET_STRING "mach-o-le"
5876 #define TARGET_ARCHITECTURE bfd_arch_unknown
5877 #define TARGET_PAGESIZE 1
5878 #define TARGET_BIG_ENDIAN 0
5879 #define TARGET_ARCHIVE 0
5880 #define TARGET_PRIORITY 1
5881
5882 #include "mach-o-target.c"
5883
5884 #undef TARGET_NAME
5885 #undef TARGET_STRING
5886 #undef TARGET_ARCHITECTURE
5887 #undef TARGET_PAGESIZE
5888 #undef TARGET_BIG_ENDIAN
5889 #undef TARGET_ARCHIVE
5890 #undef TARGET_PRIORITY
5891
5892 /* Not yet handled: creating an archive. */
5893 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5894
5895 #define bfd_mach_o_close_and_cleanup _bfd_bool_bfd_true
5896
5897 /* Not used. */
5898 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5899 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
5900 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
5901
5902 #define TARGET_NAME mach_o_fat_vec
5903 #define TARGET_STRING "mach-o-fat"
5904 #define TARGET_ARCHITECTURE bfd_arch_unknown
5905 #define TARGET_PAGESIZE 1
5906 #define TARGET_BIG_ENDIAN 1
5907 #define TARGET_ARCHIVE 1
5908 #define TARGET_PRIORITY 0
5909
5910 #include "mach-o-target.c"
5911
5912 #undef TARGET_NAME
5913 #undef TARGET_STRING
5914 #undef TARGET_ARCHITECTURE
5915 #undef TARGET_PAGESIZE
5916 #undef TARGET_BIG_ENDIAN
5917 #undef TARGET_ARCHIVE
5918 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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