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[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2021 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 <limits.h>
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "mach-o.h"
27 #include "aout/stab_gnu.h"
28 #include "mach-o/reloc.h"
29 #include "mach-o/external.h"
30 #include <ctype.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
35 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
36 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
37
38 #define FILE_ALIGN(off, algn) \
39 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn)))
40
41 static bool
42 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd);
43
44 unsigned int
45 bfd_mach_o_version (bfd *abfd)
46 {
47 bfd_mach_o_data_struct *mdata = NULL;
48
49 BFD_ASSERT (bfd_mach_o_valid (abfd));
50 mdata = bfd_mach_o_get_data (abfd);
51
52 return mdata->header.version;
53 }
54
55 bool
56 bfd_mach_o_valid (bfd *abfd)
57 {
58 if (abfd == NULL || abfd->xvec == NULL)
59 return false;
60
61 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
62 return false;
63
64 if (bfd_mach_o_get_data (abfd) == NULL)
65 return false;
66 return true;
67 }
68
69 static INLINE bool
70 mach_o_wide_p (bfd_mach_o_header *header)
71 {
72 switch (header->version)
73 {
74 case 1:
75 return false;
76 case 2:
77 return true;
78 default:
79 BFD_FAIL ();
80 return false;
81 }
82 }
83
84 static INLINE bool
85 bfd_mach_o_wide_p (bfd *abfd)
86 {
87 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
88 }
89
90 /* Tables to translate well known Mach-O segment/section names to bfd
91 names. Use of canonical names (such as .text or .debug_frame) is required
92 by gdb. */
93
94 /* __TEXT Segment. */
95 static const mach_o_section_name_xlat text_section_names_xlat[] =
96 {
97 { ".text", "__text",
98 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
99 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
100 { ".const", "__const",
101 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
102 BFD_MACH_O_S_ATTR_NONE, 0},
103 { ".static_const", "__static_const",
104 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
105 BFD_MACH_O_S_ATTR_NONE, 0},
106 { ".cstring", "__cstring",
107 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
108 BFD_MACH_O_S_CSTRING_LITERALS,
109 BFD_MACH_O_S_ATTR_NONE, 0},
110 { ".literal4", "__literal4",
111 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
112 BFD_MACH_O_S_ATTR_NONE, 2},
113 { ".literal8", "__literal8",
114 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
115 BFD_MACH_O_S_ATTR_NONE, 3},
116 { ".literal16", "__literal16",
117 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
118 BFD_MACH_O_S_ATTR_NONE, 4},
119 { ".constructor", "__constructor",
120 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
121 BFD_MACH_O_S_ATTR_NONE, 0},
122 { ".destructor", "__destructor",
123 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
124 BFD_MACH_O_S_ATTR_NONE, 0},
125 { ".eh_frame", "__eh_frame",
126 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
127 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
128 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
129 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
130 { NULL, NULL, 0, 0, 0, 0}
131 };
132
133 /* __DATA Segment. */
134 static const mach_o_section_name_xlat data_section_names_xlat[] =
135 {
136 { ".data", "__data",
137 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
138 BFD_MACH_O_S_ATTR_NONE, 0},
139 { ".bss", "__bss",
140 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
141 BFD_MACH_O_S_ATTR_NONE, 0},
142 { ".const_data", "__const",
143 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
144 BFD_MACH_O_S_ATTR_NONE, 0},
145 { ".static_data", "__static_data",
146 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
147 BFD_MACH_O_S_ATTR_NONE, 0},
148 { ".mod_init_func", "__mod_init_func",
149 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
150 BFD_MACH_O_S_ATTR_NONE, 2},
151 { ".mod_term_func", "__mod_term_func",
152 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
153 BFD_MACH_O_S_ATTR_NONE, 2},
154 { ".dyld", "__dyld",
155 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
156 BFD_MACH_O_S_ATTR_NONE, 0},
157 { ".cfstring", "__cfstring",
158 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
159 BFD_MACH_O_S_ATTR_NONE, 2},
160 { NULL, NULL, 0, 0, 0, 0}
161 };
162
163 /* __DWARF Segment. */
164 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
165 {
166 { ".debug_frame", "__debug_frame",
167 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
168 BFD_MACH_O_S_ATTR_DEBUG, 0},
169 { ".debug_info", "__debug_info",
170 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
171 BFD_MACH_O_S_ATTR_DEBUG, 0},
172 { ".debug_abbrev", "__debug_abbrev",
173 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
174 BFD_MACH_O_S_ATTR_DEBUG, 0},
175 { ".debug_aranges", "__debug_aranges",
176 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
177 BFD_MACH_O_S_ATTR_DEBUG, 0},
178 { ".debug_macinfo", "__debug_macinfo",
179 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
180 BFD_MACH_O_S_ATTR_DEBUG, 0},
181 { ".debug_line", "__debug_line",
182 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
183 BFD_MACH_O_S_ATTR_DEBUG, 0},
184 { ".debug_loc", "__debug_loc",
185 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
186 BFD_MACH_O_S_ATTR_DEBUG, 0},
187 { ".debug_pubnames", "__debug_pubnames",
188 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
189 BFD_MACH_O_S_ATTR_DEBUG, 0},
190 { ".debug_pubtypes", "__debug_pubtypes",
191 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
192 BFD_MACH_O_S_ATTR_DEBUG, 0},
193 { ".debug_str", "__debug_str",
194 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
195 BFD_MACH_O_S_ATTR_DEBUG, 0},
196 { ".debug_ranges", "__debug_ranges",
197 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
198 BFD_MACH_O_S_ATTR_DEBUG, 0},
199 { ".debug_macro", "__debug_macro",
200 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
201 BFD_MACH_O_S_ATTR_DEBUG, 0},
202 { ".debug_gdb_scripts", "__debug_gdb_scri",
203 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
204 BFD_MACH_O_S_ATTR_DEBUG, 0},
205 { NULL, NULL, 0, 0, 0, 0}
206 };
207
208 /* __OBJC Segment. */
209 static const mach_o_section_name_xlat objc_section_names_xlat[] =
210 {
211 { ".objc_class", "__class",
212 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
213 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
214 { ".objc_meta_class", "__meta_class",
215 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
216 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
217 { ".objc_cat_cls_meth", "__cat_cls_meth",
218 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
219 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
220 { ".objc_cat_inst_meth", "__cat_inst_meth",
221 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
222 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
223 { ".objc_protocol", "__protocol",
224 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
225 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
226 { ".objc_string_object", "__string_object",
227 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
228 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
229 { ".objc_cls_meth", "__cls_meth",
230 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
231 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
232 { ".objc_inst_meth", "__inst_meth",
233 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
234 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
235 { ".objc_cls_refs", "__cls_refs",
236 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
237 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
238 { ".objc_message_refs", "__message_refs",
239 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
240 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
241 { ".objc_symbols", "__symbols",
242 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
243 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
244 { ".objc_category", "__category",
245 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
246 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
247 { ".objc_class_vars", "__class_vars",
248 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
249 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
250 { ".objc_instance_vars", "__instance_vars",
251 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
252 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
253 { ".objc_module_info", "__module_info",
254 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
255 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
256 { ".objc_selector_strs", "__selector_strs",
257 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
258 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
259 { ".objc_image_info", "__image_info",
260 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
261 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
262 { ".objc_selector_fixup", "__sel_fixup",
263 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
264 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
265 /* Objc V1 */
266 { ".objc1_class_ext", "__class_ext",
267 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
268 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
269 { ".objc1_property_list", "__property",
270 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
271 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
272 { ".objc1_protocol_ext", "__protocol_ext",
273 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
274 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
275 { NULL, NULL, 0, 0, 0, 0}
276 };
277
278 static const mach_o_segment_name_xlat segsec_names_xlat[] =
279 {
280 { "__TEXT", text_section_names_xlat },
281 { "__DATA", data_section_names_xlat },
282 { "__DWARF", dwarf_section_names_xlat },
283 { "__OBJC", objc_section_names_xlat },
284 { NULL, NULL }
285 };
286
287 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
288
289 /* For both cases bfd-name => mach-o name and vice versa, the specific target
290 is checked before the generic. This allows a target (e.g. ppc for cstring)
291 to override the generic definition with a more specific one. */
292
293 /* Fetch the translation from a Mach-O section designation (segment, section)
294 as a bfd short name, if one exists. Otherwise return NULL.
295
296 Allow the segment and section names to be unterminated 16 byte arrays. */
297
298 const mach_o_section_name_xlat *
299 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
300 const char *sectname)
301 {
302 const struct mach_o_segment_name_xlat *seg;
303 const mach_o_section_name_xlat *sec;
304 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
305
306 /* First try any target-specific translations defined... */
307 if (bed->segsec_names_xlat)
308 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
309 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
310 for (sec = seg->sections; sec->mach_o_name; sec++)
311 if (strncmp (sec->mach_o_name, sectname,
312 BFD_MACH_O_SECTNAME_SIZE) == 0)
313 return sec;
314
315 /* ... and then the Mach-O generic ones. */
316 for (seg = segsec_names_xlat; seg->segname; seg++)
317 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
318 for (sec = seg->sections; sec->mach_o_name; sec++)
319 if (strncmp (sec->mach_o_name, sectname,
320 BFD_MACH_O_SECTNAME_SIZE) == 0)
321 return sec;
322
323 return NULL;
324 }
325
326 /* If the bfd_name for this section is a 'canonical' form for which we
327 know the Mach-O data, return the segment name and the data for the
328 Mach-O equivalent. Otherwise return NULL. */
329
330 const mach_o_section_name_xlat *
331 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
332 const char **segname)
333 {
334 const struct mach_o_segment_name_xlat *seg;
335 const mach_o_section_name_xlat *sec;
336 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
337 *segname = NULL;
338
339 if (bfd_name[0] != '.')
340 return NULL;
341
342 /* First try any target-specific translations defined... */
343 if (bed->segsec_names_xlat)
344 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
345 for (sec = seg->sections; sec->bfd_name; sec++)
346 if (strcmp (bfd_name, sec->bfd_name) == 0)
347 {
348 *segname = seg->segname;
349 return sec;
350 }
351
352 /* ... and then the Mach-O generic ones. */
353 for (seg = segsec_names_xlat; seg->segname; seg++)
354 for (sec = seg->sections; sec->bfd_name; sec++)
355 if (strcmp (bfd_name, sec->bfd_name) == 0)
356 {
357 *segname = seg->segname;
358 return sec;
359 }
360
361 return NULL;
362 }
363
364 /* Convert Mach-O section name to BFD.
365
366 Try to use standard/canonical names, for which we have tables including
367 default flag settings - which are returned. Otherwise forge a new name
368 in the form "<segmentname>.<sectionname>" this will be prefixed with
369 LC_SEGMENT. if the segment name does not begin with an underscore.
370
371 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
372 terminated if the name length is exactly 16 bytes - but must be if the name
373 length is less than 16 characters). */
374
375 void
376 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
377 const char *secname, const char **name,
378 flagword *flags)
379 {
380 const mach_o_section_name_xlat *xlat;
381 char *res;
382 unsigned int len;
383 const char *pfx = "";
384
385 *name = NULL;
386 *flags = SEC_NO_FLAGS;
387
388 /* First search for a canonical name...
389 xlat will be non-null if there is an entry for segname, secname. */
390 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
391 if (xlat)
392 {
393 len = strlen (xlat->bfd_name);
394 res = bfd_alloc (abfd, len + 1);
395 if (res == NULL)
396 return;
397 memcpy (res, xlat->bfd_name, len+1);
398 *name = res;
399 *flags = xlat->bfd_flags;
400 return;
401 }
402
403 /* ... else we make up a bfd name from the segment concatenated with the
404 section. */
405
406 len = 16 + 1 + 16 + 1;
407
408 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
409 with an underscore. */
410 if (segname[0] != '_')
411 {
412 static const char seg_pfx[] = "LC_SEGMENT.";
413
414 pfx = seg_pfx;
415 len += sizeof (seg_pfx) - 1;
416 }
417
418 res = bfd_alloc (abfd, len);
419 if (res == NULL)
420 return;
421 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
422 *name = res;
423 }
424
425 /* Convert a bfd section name to a Mach-O segment + section name.
426
427 If the name is a canonical one for which we have a Darwin match
428 return the translation table - which contains defaults for flags,
429 type, attribute and default alignment data.
430
431 Otherwise, expand the bfd_name (assumed to be in the form
432 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
433
434 static const mach_o_section_name_xlat *
435 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
436 asection *sect,
437 bfd_mach_o_section *section)
438 {
439 const mach_o_section_name_xlat *xlat;
440 const char *name = bfd_section_name (sect);
441 const char *segname;
442 const char *dot;
443 unsigned int len;
444 unsigned int seglen;
445 unsigned int seclen;
446
447 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
448 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
449
450 /* See if is a canonical name ... */
451 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
452 if (xlat)
453 {
454 strcpy (section->segname, segname);
455 strcpy (section->sectname, xlat->mach_o_name);
456 return xlat;
457 }
458
459 /* .. else we convert our constructed one back to Mach-O.
460 Strip LC_SEGMENT. prefix, if present. */
461 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
462 name += 11;
463
464 /* Find a dot. */
465 dot = strchr (name, '.');
466 len = strlen (name);
467
468 /* Try to split name into segment and section names. */
469 if (dot && dot != name)
470 {
471 seglen = dot - name;
472 seclen = len - (dot + 1 - name);
473
474 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
475 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
476 {
477 memcpy (section->segname, name, seglen);
478 section->segname[seglen] = 0;
479 memcpy (section->sectname, dot + 1, seclen);
480 section->sectname[seclen] = 0;
481 return NULL;
482 }
483 }
484
485 /* The segment and section names are both missing - don't make them
486 into dots. */
487 if (dot && dot == name)
488 return NULL;
489
490 /* Just duplicate the name into both segment and section. */
491 if (len > 16)
492 len = 16;
493 memcpy (section->segname, name, len);
494 section->segname[len] = 0;
495 memcpy (section->sectname, name, len);
496 section->sectname[len] = 0;
497 return NULL;
498 }
499
500 /* Return the size of an entry for section SEC.
501 Must be called only for symbol pointer section and symbol stubs
502 sections. */
503
504 unsigned int
505 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
506 {
507 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
508 {
509 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
510 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
511 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
512 case BFD_MACH_O_S_SYMBOL_STUBS:
513 return sec->reserved2;
514 default:
515 BFD_FAIL ();
516 return 0;
517 }
518 }
519
520 /* Return the number of indirect symbols for a section.
521 Must be called only for symbol pointer section and symbol stubs
522 sections. */
523
524 unsigned int
525 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
526 {
527 unsigned int elsz;
528
529 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
530 if (elsz == 0)
531 return 0;
532 else
533 return sec->size / elsz;
534 }
535
536 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */
537
538 static void
539 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd)
540 {
541 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
542
543 if (mdata->last_command != NULL)
544 mdata->last_command->next = cmd;
545 else
546 mdata->first_command = cmd;
547 mdata->last_command = cmd;
548 cmd->next = NULL;
549 }
550
551 /* Copy any private info we understand from the input symbol
552 to the output symbol. */
553
554 bool
555 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
556 asymbol *isymbol,
557 bfd *obfd ATTRIBUTE_UNUSED,
558 asymbol *osymbol)
559 {
560 bfd_mach_o_asymbol *os, *is;
561
562 os = (bfd_mach_o_asymbol *)osymbol;
563 is = (bfd_mach_o_asymbol *)isymbol;
564 os->n_type = is->n_type;
565 os->n_sect = is->n_sect;
566 os->n_desc = is->n_desc;
567 os->symbol.udata.i = is->symbol.udata.i;
568
569 return true;
570 }
571
572 /* Copy any private info we understand from the input section
573 to the output section. */
574
575 bool
576 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection,
577 bfd *obfd, asection *osection)
578 {
579 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection);
580 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection);
581
582 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour
583 || obfd->xvec->flavour != bfd_target_mach_o_flavour)
584 return true;
585
586 BFD_ASSERT (is != NULL && os != NULL);
587
588 os->flags = is->flags;
589 os->reserved1 = is->reserved1;
590 os->reserved2 = is->reserved2;
591 os->reserved3 = is->reserved3;
592
593 return true;
594 }
595
596 static const char *
597 cputype (unsigned long value)
598 {
599 switch (value)
600 {
601 case BFD_MACH_O_CPU_TYPE_VAX: return "VAX";
602 case BFD_MACH_O_CPU_TYPE_MC680x0: return "MC68k";
603 case BFD_MACH_O_CPU_TYPE_I386: return "I386";
604 case BFD_MACH_O_CPU_TYPE_MIPS: return "MIPS";
605 case BFD_MACH_O_CPU_TYPE_MC98000: return "MC98k";
606 case BFD_MACH_O_CPU_TYPE_HPPA: return "HPPA";
607 case BFD_MACH_O_CPU_TYPE_ARM: return "ARM";
608 case BFD_MACH_O_CPU_TYPE_MC88000: return "MC88K";
609 case BFD_MACH_O_CPU_TYPE_SPARC: return "SPARC";
610 case BFD_MACH_O_CPU_TYPE_I860: return "I860";
611 case BFD_MACH_O_CPU_TYPE_ALPHA: return "ALPHA";
612 case BFD_MACH_O_CPU_TYPE_POWERPC: return "PPC";
613 case BFD_MACH_O_CPU_TYPE_POWERPC_64: return "PPC64";
614 case BFD_MACH_O_CPU_TYPE_X86_64: return "X86_64";
615 case BFD_MACH_O_CPU_TYPE_ARM64: return "ARM64";
616 default: return _("<unknown>");
617 }
618 }
619
620 static const char *
621 cpusubtype (unsigned long cpu_type, unsigned long cpu_subtype, char *buffer)
622 {
623 buffer[0] = 0;
624 switch (cpu_subtype & BFD_MACH_O_CPU_SUBTYPE_MASK)
625 {
626 case 0:
627 break;
628 case BFD_MACH_O_CPU_SUBTYPE_LIB64:
629 sprintf (buffer, " (LIB64)"); break;
630 default:
631 sprintf (buffer, _("<unknown mask flags>")); break;
632 }
633
634 cpu_subtype &= ~ BFD_MACH_O_CPU_SUBTYPE_MASK;
635
636 switch (cpu_type)
637 {
638 case BFD_MACH_O_CPU_TYPE_X86_64:
639 case BFD_MACH_O_CPU_TYPE_I386:
640 switch (cpu_subtype)
641 {
642 case BFD_MACH_O_CPU_SUBTYPE_X86_ALL:
643 return strcat (buffer, " (X86_ALL)");
644 default:
645 break;
646 }
647 break;
648
649 case BFD_MACH_O_CPU_TYPE_ARM:
650 switch (cpu_subtype)
651 {
652 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
653 return strcat (buffer, " (ARM_ALL)");
654 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
655 return strcat (buffer, " (ARM_V4T)");
656 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
657 return strcat (buffer, " (ARM_V6)");
658 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
659 return strcat (buffer, " (ARM_V5TEJ)");
660 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
661 return strcat (buffer, " (ARM_XSCALE)");
662 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
663 return strcat (buffer, " (ARM_V7)");
664 default:
665 break;
666 }
667 break;
668
669 case BFD_MACH_O_CPU_TYPE_ARM64:
670 switch (cpu_subtype)
671 {
672 case BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL:
673 return strcat (buffer, " (ARM64_ALL)");
674 case BFD_MACH_O_CPU_SUBTYPE_ARM64_V8:
675 return strcat (buffer, " (ARM64_V8)");
676 default:
677 break;
678 }
679 break;
680
681 default:
682 break;
683 }
684
685 if (cpu_subtype != 0)
686 return strcat (buffer, _(" (<unknown>)"));
687
688 return buffer;
689 }
690
691 bool
692 bfd_mach_o_bfd_print_private_bfd_data (bfd *abfd, void *ptr)
693 {
694 FILE * file = (FILE *) ptr;
695 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
696 char buff[128];
697
698 fprintf (file, _(" MACH-O header:\n"));
699 fprintf (file, _(" magic: %#lx\n"), (long) mdata->header.magic);
700 fprintf (file, _(" cputype: %#lx (%s)\n"), (long) mdata->header.cputype,
701 cputype (mdata->header.cputype));
702 fprintf (file, _(" cpusubtype: %#lx%s\n"), (long) mdata->header.cpusubtype,
703 cpusubtype (mdata->header.cputype, mdata->header.cpusubtype, buff));
704 fprintf (file, _(" filetype: %#lx\n"), (long) mdata->header.filetype);
705 fprintf (file, _(" ncmds: %#lx\n"), (long) mdata->header.ncmds);
706 fprintf (file, _(" sizeocmds: %#lx\n"), (long) mdata->header.sizeofcmds);
707 fprintf (file, _(" flags: %#lx\n"), (long) mdata->header.flags);
708 fprintf (file, _(" version: %x\n"), mdata->header.version);
709
710 return true;
711 }
712
713 /* Copy any private info we understand from the input bfd
714 to the output bfd. */
715
716 bool
717 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
718 {
719 bfd_mach_o_data_struct *imdata;
720 bfd_mach_o_data_struct *omdata;
721 bfd_mach_o_load_command *icmd;
722
723 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
724 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
725 return true;
726
727 BFD_ASSERT (bfd_mach_o_valid (ibfd));
728 BFD_ASSERT (bfd_mach_o_valid (obfd));
729
730 imdata = bfd_mach_o_get_data (ibfd);
731 omdata = bfd_mach_o_get_data (obfd);
732
733 /* Copy header flags. */
734 omdata->header.flags = imdata->header.flags;
735
736 /* PR 23299. Copy the cputype. */
737 if (imdata->header.cputype != omdata->header.cputype)
738 {
739 if (omdata->header.cputype == 0)
740 omdata->header.cputype = imdata->header.cputype;
741 else if (imdata->header.cputype != 0)
742 /* Urg - what has happened ? */
743 _bfd_error_handler (_("incompatible cputypes in mach-o files: %ld vs %ld"),
744 (long) imdata->header.cputype,
745 (long) omdata->header.cputype);
746 }
747
748 /* Copy the cpusubtype. */
749 omdata->header.cpusubtype = imdata->header.cpusubtype;
750
751 /* Copy commands. */
752 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next)
753 {
754 bfd_mach_o_load_command *ocmd;
755
756 switch (icmd->type)
757 {
758 case BFD_MACH_O_LC_LOAD_DYLIB:
759 case BFD_MACH_O_LC_LOAD_DYLINKER:
760 case BFD_MACH_O_LC_DYLD_INFO:
761 /* Command is copied. */
762 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command));
763 if (ocmd == NULL)
764 return false;
765
766 /* Copy common fields. */
767 ocmd->type = icmd->type;
768 ocmd->type_required = icmd->type_required;
769 ocmd->offset = 0;
770 ocmd->len = icmd->len;
771 break;
772
773 default:
774 /* Command is not copied. */
775 continue;
776 break;
777 }
778
779 switch (icmd->type)
780 {
781 case BFD_MACH_O_LC_LOAD_DYLIB:
782 {
783 bfd_mach_o_dylib_command *idy = &icmd->command.dylib;
784 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib;
785
786 ody->name_offset = idy->name_offset;
787 ody->timestamp = idy->timestamp;
788 ody->current_version = idy->current_version;
789 ody->compatibility_version = idy->compatibility_version;
790 ody->name_str = idy->name_str;
791 }
792 break;
793
794 case BFD_MACH_O_LC_LOAD_DYLINKER:
795 {
796 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker;
797 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker;
798
799 ody->name_offset = idy->name_offset;
800 ody->name_str = idy->name_str;
801 }
802 break;
803
804 case BFD_MACH_O_LC_DYLD_INFO:
805 {
806 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info;
807 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info;
808
809 if (bfd_mach_o_read_dyld_content (ibfd, idy))
810 {
811 ody->rebase_size = idy->rebase_size;
812 ody->rebase_content = idy->rebase_content;
813
814 ody->bind_size = idy->bind_size;
815 ody->bind_content = idy->bind_content;
816
817 ody->weak_bind_size = idy->weak_bind_size;
818 ody->weak_bind_content = idy->weak_bind_content;
819
820 ody->lazy_bind_size = idy->lazy_bind_size;
821 ody->lazy_bind_content = idy->lazy_bind_content;
822
823 ody->export_size = idy->export_size;
824 ody->export_content = idy->export_content;
825 }
826 /* PR 17512L: file: 730e492d. */
827 else
828 {
829 ody->rebase_size =
830 ody->bind_size =
831 ody->weak_bind_size =
832 ody->lazy_bind_size =
833 ody->export_size = 0;
834 ody->rebase_content =
835 ody->bind_content =
836 ody->weak_bind_content =
837 ody->lazy_bind_content =
838 ody->export_content = NULL;
839 }
840 }
841 break;
842
843 default:
844 /* That command should be handled. */
845 abort ();
846 }
847
848 /* Insert command. */
849 bfd_mach_o_append_command (obfd, ocmd);
850 }
851
852 return true;
853 }
854
855 /* This allows us to set up to 32 bits of flags (unless we invent some
856 fiendish scheme to subdivide). For now, we'll just set the file flags
857 without error checking - just overwrite. */
858
859 bool
860 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
861 {
862 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
863
864 if (!mdata)
865 return false;
866
867 mdata->header.flags = flags;
868 return true;
869 }
870
871 /* Count the total number of symbols. */
872
873 static long
874 bfd_mach_o_count_symbols (bfd *abfd)
875 {
876 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
877
878 if (mdata->symtab == NULL)
879 return 0;
880 return mdata->symtab->nsyms;
881 }
882
883 long
884 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
885 {
886 long nsyms = bfd_mach_o_count_symbols (abfd);
887
888 return ((nsyms + 1) * sizeof (asymbol *));
889 }
890
891 long
892 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
893 {
894 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
895 long nsyms = bfd_mach_o_count_symbols (abfd);
896 bfd_mach_o_symtab_command *sym = mdata->symtab;
897 unsigned long j;
898
899 if (nsyms < 0)
900 return nsyms;
901
902 if (nsyms == 0)
903 {
904 /* Do not try to read symbols if there are none. */
905 alocation[0] = NULL;
906 return 0;
907 }
908
909 if (!bfd_mach_o_read_symtab_symbols (abfd))
910 {
911 _bfd_error_handler
912 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
913 return 0;
914 }
915
916 BFD_ASSERT (sym->symbols != NULL);
917
918 for (j = 0; j < sym->nsyms; j++)
919 alocation[j] = &sym->symbols[j].symbol;
920
921 alocation[j] = NULL;
922
923 return nsyms;
924 }
925
926 /* Create synthetic symbols for indirect symbols. */
927
928 long
929 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
930 long symcount ATTRIBUTE_UNUSED,
931 asymbol **syms ATTRIBUTE_UNUSED,
932 long dynsymcount ATTRIBUTE_UNUSED,
933 asymbol **dynsyms ATTRIBUTE_UNUSED,
934 asymbol **ret)
935 {
936 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
937 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
938 bfd_mach_o_symtab_command *symtab = mdata->symtab;
939 asymbol *s;
940 char * s_start;
941 char * s_end;
942 unsigned long count, i, j, n;
943 size_t size;
944 char *names;
945 char *nul_name;
946 const char stub [] = "$stub";
947
948 *ret = NULL;
949
950 /* Stop now if no symbols or no indirect symbols. */
951 if (dysymtab == NULL || dysymtab->nindirectsyms == 0
952 || symtab == NULL || symtab->symbols == NULL)
953 return 0;
954
955 /* We need to allocate a bfd symbol for every indirect symbol and to
956 allocate the memory for its name. */
957 count = dysymtab->nindirectsyms;
958 size = count * sizeof (asymbol) + 1;
959
960 for (j = 0; j < count; j++)
961 {
962 const char * strng;
963 unsigned int isym = dysymtab->indirect_syms[j];
964
965 /* Some indirect symbols are anonymous. */
966 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name))
967 /* PR 17512: file: f5b8eeba. */
968 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub);
969 }
970
971 s_start = bfd_malloc (size);
972 s = *ret = (asymbol *) s_start;
973 if (s == NULL)
974 return -1;
975 names = (char *) (s + count);
976 nul_name = names;
977 *names++ = 0;
978 s_end = s_start + size;
979
980 n = 0;
981 for (i = 0; i < mdata->nsects; i++)
982 {
983 bfd_mach_o_section *sec = mdata->sections[i];
984 unsigned int first, last;
985 bfd_vma addr;
986 bfd_vma entry_size;
987
988 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
989 {
990 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
991 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
992 case BFD_MACH_O_S_SYMBOL_STUBS:
993 /* Only these sections have indirect symbols. */
994 first = sec->reserved1;
995 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
996 addr = sec->addr;
997 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
998
999 /* PR 17512: file: 08e15eec. */
1000 if (first >= count || last >= count || first > last)
1001 goto fail;
1002
1003 for (j = first; j < last; j++)
1004 {
1005 unsigned int isym = dysymtab->indirect_syms[j];
1006
1007 /* PR 17512: file: 04d64d9b. */
1008 if (((char *) s) + sizeof (* s) > s_end)
1009 goto fail;
1010
1011 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
1012 s->section = sec->bfdsection;
1013 s->value = addr - sec->addr;
1014 s->udata.p = NULL;
1015
1016 if (isym < symtab->nsyms
1017 && symtab->symbols[isym].symbol.name)
1018 {
1019 const char *sym = symtab->symbols[isym].symbol.name;
1020 size_t len;
1021
1022 s->name = names;
1023 len = strlen (sym);
1024 /* PR 17512: file: 47dfd4d2. */
1025 if (names + len >= s_end)
1026 goto fail;
1027 memcpy (names, sym, len);
1028 names += len;
1029 /* PR 17512: file: 18f340a4. */
1030 if (names + sizeof (stub) >= s_end)
1031 goto fail;
1032 memcpy (names, stub, sizeof (stub));
1033 names += sizeof (stub);
1034 }
1035 else
1036 s->name = nul_name;
1037
1038 addr += entry_size;
1039 s++;
1040 n++;
1041 }
1042 break;
1043 default:
1044 break;
1045 }
1046 }
1047
1048 return n;
1049
1050 fail:
1051 free (s_start);
1052 * ret = NULL;
1053 return -1;
1054 }
1055
1056 void
1057 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
1058 asymbol *symbol,
1059 symbol_info *ret)
1060 {
1061 bfd_symbol_info (symbol, ret);
1062 }
1063
1064 void
1065 bfd_mach_o_print_symbol (bfd *abfd,
1066 void * afile,
1067 asymbol *symbol,
1068 bfd_print_symbol_type how)
1069 {
1070 FILE *file = (FILE *) afile;
1071 const char *name;
1072 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
1073
1074 switch (how)
1075 {
1076 case bfd_print_symbol_name:
1077 fprintf (file, "%s", symbol->name);
1078 break;
1079 default:
1080 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
1081 if (asym->n_type & BFD_MACH_O_N_STAB)
1082 name = bfd_get_stab_name (asym->n_type);
1083 else
1084 switch (asym->n_type & BFD_MACH_O_N_TYPE)
1085 {
1086 case BFD_MACH_O_N_UNDF:
1087 if (symbol->value == 0)
1088 name = "UND";
1089 else
1090 name = "COM";
1091 break;
1092 case BFD_MACH_O_N_ABS:
1093 name = "ABS";
1094 break;
1095 case BFD_MACH_O_N_INDR:
1096 name = "INDR";
1097 break;
1098 case BFD_MACH_O_N_PBUD:
1099 name = "PBUD";
1100 break;
1101 case BFD_MACH_O_N_SECT:
1102 name = "SECT";
1103 break;
1104 default:
1105 name = "???";
1106 break;
1107 }
1108 if (name == NULL)
1109 name = "";
1110 fprintf (file, " %02x %-6s %02x %04x",
1111 asym->n_type, name, asym->n_sect, asym->n_desc);
1112 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
1113 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
1114 fprintf (file, " [%s]", symbol->section->name);
1115 fprintf (file, " %s", symbol->name);
1116 }
1117 }
1118
1119 static void
1120 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
1121 bfd_mach_o_cpu_subtype msubtype,
1122 enum bfd_architecture *type,
1123 unsigned long *subtype)
1124 {
1125 *subtype = bfd_arch_unknown;
1126
1127 switch (mtype)
1128 {
1129 case BFD_MACH_O_CPU_TYPE_VAX:
1130 *type = bfd_arch_vax;
1131 break;
1132 case BFD_MACH_O_CPU_TYPE_MC680x0:
1133 *type = bfd_arch_m68k;
1134 break;
1135 case BFD_MACH_O_CPU_TYPE_I386:
1136 *type = bfd_arch_i386;
1137 *subtype = bfd_mach_i386_i386;
1138 break;
1139 case BFD_MACH_O_CPU_TYPE_X86_64:
1140 *type = bfd_arch_i386;
1141 *subtype = bfd_mach_x86_64;
1142 break;
1143 case BFD_MACH_O_CPU_TYPE_MIPS:
1144 *type = bfd_arch_mips;
1145 break;
1146 case BFD_MACH_O_CPU_TYPE_MC98000:
1147 *type = bfd_arch_m98k;
1148 break;
1149 case BFD_MACH_O_CPU_TYPE_HPPA:
1150 *type = bfd_arch_hppa;
1151 break;
1152 case BFD_MACH_O_CPU_TYPE_ARM:
1153 *type = bfd_arch_arm;
1154 switch (msubtype)
1155 {
1156 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
1157 *subtype = bfd_mach_arm_4T;
1158 break;
1159 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
1160 *subtype = bfd_mach_arm_4T; /* Best fit ? */
1161 break;
1162 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
1163 *subtype = bfd_mach_arm_5TE;
1164 break;
1165 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
1166 *subtype = bfd_mach_arm_XScale;
1167 break;
1168 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
1169 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
1170 break;
1171 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
1172 default:
1173 break;
1174 }
1175 break;
1176 case BFD_MACH_O_CPU_TYPE_SPARC:
1177 *type = bfd_arch_sparc;
1178 *subtype = bfd_mach_sparc;
1179 break;
1180 case BFD_MACH_O_CPU_TYPE_ALPHA:
1181 *type = bfd_arch_alpha;
1182 break;
1183 case BFD_MACH_O_CPU_TYPE_POWERPC:
1184 *type = bfd_arch_powerpc;
1185 *subtype = bfd_mach_ppc;
1186 break;
1187 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
1188 *type = bfd_arch_powerpc;
1189 *subtype = bfd_mach_ppc64;
1190 break;
1191 case BFD_MACH_O_CPU_TYPE_ARM64:
1192 *type = bfd_arch_aarch64;
1193 *subtype = bfd_mach_aarch64;
1194 break;
1195 default:
1196 *type = bfd_arch_unknown;
1197 break;
1198 }
1199 }
1200
1201 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the
1202 number of bytes written or -1 in case of error. */
1203
1204 static int
1205 bfd_mach_o_pad4 (bfd *abfd, unsigned int len)
1206 {
1207 if (len % 4 != 0)
1208 {
1209 char pad[4] = {0,0,0,0};
1210 unsigned int padlen = 4 - (len % 4);
1211
1212 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1213 return -1;
1214
1215 return padlen;
1216 }
1217 else
1218 return 0;
1219 }
1220
1221 /* Likewise, but for a command. */
1222
1223 static int
1224 bfd_mach_o_pad_command (bfd *abfd, unsigned int len)
1225 {
1226 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4;
1227
1228 if (len % align != 0)
1229 {
1230 char pad[8] = {0};
1231 unsigned int padlen = align - (len % align);
1232
1233 if (bfd_bwrite (pad, padlen, abfd) != padlen)
1234 return -1;
1235
1236 return padlen;
1237 }
1238 else
1239 return 0;
1240 }
1241
1242 static bool
1243 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
1244 {
1245 struct mach_o_header_external raw;
1246 unsigned int size;
1247
1248 size = mach_o_wide_p (header) ?
1249 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
1250
1251 bfd_h_put_32 (abfd, header->magic, raw.magic);
1252 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
1253 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
1254 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
1255 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
1256 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
1257 bfd_h_put_32 (abfd, header->flags, raw.flags);
1258
1259 if (mach_o_wide_p (header))
1260 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
1261
1262 if (bfd_seek (abfd, 0, SEEK_SET) != 0
1263 || bfd_bwrite (&raw, size, abfd) != size)
1264 return false;
1265
1266 return true;
1267 }
1268
1269 static bool
1270 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
1271 {
1272 bfd_mach_o_thread_command *cmd = &command->command.thread;
1273 unsigned int i;
1274 struct mach_o_thread_command_external raw;
1275 unsigned int offset;
1276
1277 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
1278 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
1279
1280 offset = BFD_MACH_O_LC_SIZE;
1281 for (i = 0; i < cmd->nflavours; i++)
1282 {
1283 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
1284 BFD_ASSERT (cmd->flavours[i].offset ==
1285 (command->offset + offset + BFD_MACH_O_LC_SIZE));
1286
1287 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
1288 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
1289
1290 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
1291 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1292 return false;
1293
1294 offset += cmd->flavours[i].size + sizeof (raw);
1295 }
1296
1297 return true;
1298 }
1299
1300 static bool
1301 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
1302 {
1303 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
1304 struct mach_o_str_command_external raw;
1305 unsigned int namelen;
1306
1307 bfd_h_put_32 (abfd, cmd->name_offset, raw.str);
1308
1309 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1310 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1311 return false;
1312
1313 namelen = strlen (cmd->name_str) + 1;
1314 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1315 return false;
1316
1317 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1318 return false;
1319
1320 return true;
1321 }
1322
1323 static bool
1324 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command)
1325 {
1326 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
1327 struct mach_o_dylib_command_external raw;
1328 unsigned int namelen;
1329
1330 bfd_h_put_32 (abfd, cmd->name_offset, raw.name);
1331 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp);
1332 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version);
1333 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version);
1334
1335 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1336 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1337 return false;
1338
1339 namelen = strlen (cmd->name_str) + 1;
1340 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen)
1341 return false;
1342
1343 if (bfd_mach_o_pad_command (abfd, namelen) < 0)
1344 return false;
1345
1346 return true;
1347 }
1348
1349 static bool
1350 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command)
1351 {
1352 bfd_mach_o_main_command *cmd = &command->command.main;
1353 struct mach_o_entry_point_command_external raw;
1354
1355 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff);
1356 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize);
1357
1358 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1359 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1360 return false;
1361
1362 return true;
1363 }
1364
1365 static bool
1366 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
1367 {
1368 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
1369 struct mach_o_dyld_info_command_external raw;
1370
1371 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off);
1372 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size);
1373 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off);
1374 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size);
1375 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off);
1376 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size);
1377 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off);
1378 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size);
1379 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off);
1380 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size);
1381
1382 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1383 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1384 return false;
1385
1386 if (cmd->rebase_size != 0)
1387 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0
1388 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) !=
1389 cmd->rebase_size))
1390 return false;
1391
1392 if (cmd->bind_size != 0)
1393 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0
1394 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) !=
1395 cmd->bind_size))
1396 return false;
1397
1398 if (cmd->weak_bind_size != 0)
1399 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0
1400 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) !=
1401 cmd->weak_bind_size))
1402 return false;
1403
1404 if (cmd->lazy_bind_size != 0)
1405 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0
1406 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) !=
1407 cmd->lazy_bind_size))
1408 return false;
1409
1410 if (cmd->export_size != 0)
1411 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0
1412 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) !=
1413 cmd->export_size))
1414 return false;
1415
1416 return true;
1417 }
1418
1419 long
1420 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
1421 asection *asect)
1422 {
1423 #if SIZEOF_LONG == SIZEOF_INT
1424 if (asect->reloc_count >= LONG_MAX / sizeof (arelent *))
1425 {
1426 bfd_set_error (bfd_error_file_too_big);
1427 return -1;
1428 }
1429 #endif
1430 return (asect->reloc_count + 1) * sizeof (arelent *);
1431 }
1432
1433 /* In addition to the need to byte-swap the symbol number, the bit positions
1434 of the fields in the relocation information vary per target endian-ness. */
1435
1436 void
1437 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
1438 unsigned char *fields)
1439 {
1440 unsigned char info = fields[3];
1441
1442 if (bfd_big_endian (abfd))
1443 {
1444 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
1445 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1446 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
1447 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
1448 & BFD_MACH_O_LENGTH_MASK;
1449 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1450 }
1451 else
1452 {
1453 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1454 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1455 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1456 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1457 & BFD_MACH_O_LENGTH_MASK;
1458 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1459 }
1460 }
1461
1462 /* Set syms_ptr_ptr and addend of RES. */
1463
1464 bool
1465 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd,
1466 bfd_mach_o_reloc_info *reloc,
1467 arelent *res, asymbol **syms)
1468 {
1469 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1470 unsigned int num;
1471 asymbol **sym;
1472
1473 /* Non-scattered relocation. */
1474 reloc->r_scattered = 0;
1475 res->addend = 0;
1476
1477 num = reloc->r_value;
1478
1479 if (reloc->r_extern)
1480 {
1481 /* PR 17512: file: 8396-1185-0.004. */
1482 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd))
1483 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1484 else if (syms == NULL)
1485 sym = bfd_und_section_ptr->symbol_ptr_ptr;
1486 else
1487 /* An external symbol number. */
1488 sym = syms + num;
1489 }
1490 else if (num == 0x00ffffff || num == 0)
1491 {
1492 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1493 is generic code, we don't know wether this is really a PAIR.
1494 This value is almost certainly not a valid section number, hence
1495 this specific case to avoid an assertion failure.
1496 Target specific swap_reloc_in routine should adjust that. */
1497 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1498 }
1499 else
1500 {
1501 /* PR 17512: file: 006-2964-0.004. */
1502 if (num > mdata->nsects)
1503 {
1504 _bfd_error_handler (_("\
1505 malformed mach-o reloc: section index is greater than the number of sections"));
1506 return false;
1507 }
1508
1509 /* A section number. */
1510 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1511 /* For a symbol defined in section S, the addend (stored in the
1512 binary) contains the address of the section. To comply with
1513 bfd convention, subtract the section address.
1514 Use the address from the header, so that the user can modify
1515 the vma of the section. */
1516 res->addend = -mdata->sections[num - 1]->addr;
1517 }
1518
1519 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1520 in the lower 16bits of the address value. So we have to find the
1521 'symbol' from the preceding reloc. We do this even though the
1522 section symbol is probably not needed here, because NULL symbol
1523 values cause an assert in generic BFD code. This must be done in
1524 the PPC swap_reloc_in routine. */
1525 res->sym_ptr_ptr = sym;
1526
1527 return true;
1528 }
1529
1530 /* Do most of the work for canonicalize_relocs on RAW: create internal
1531 representation RELOC and set most fields of RES using symbol table SYMS.
1532 Each target still has to set the howto of RES and possibly adjust other
1533 fields.
1534 Previously the Mach-O hook point was simply swap_in, but some targets
1535 (like arm64) don't follow the generic rules (symnum is a value for the
1536 non-scattered relocation ADDEND). */
1537
1538 bool
1539 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd,
1540 struct mach_o_reloc_info_external *raw,
1541 bfd_mach_o_reloc_info *reloc,
1542 arelent *res, asymbol **syms)
1543 {
1544 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1545 bfd_vma addr;
1546
1547 addr = bfd_get_32 (abfd, raw->r_address);
1548 res->sym_ptr_ptr = NULL;
1549 res->addend = 0;
1550
1551 if (addr & BFD_MACH_O_SR_SCATTERED)
1552 {
1553 unsigned int j;
1554 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1555
1556 /* Scattered relocation, can't be extern. */
1557 reloc->r_scattered = 1;
1558 reloc->r_extern = 0;
1559
1560 /* Extract section and offset from r_value (symnum). */
1561 reloc->r_value = symnum;
1562 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1563 end of the data for the section (e.g. in a calculation of section
1564 data length). At present, the symbol will end up associated with
1565 the following section or, if it falls within alignment padding, as
1566 null - which will assert later. */
1567 for (j = 0; j < mdata->nsects; j++)
1568 {
1569 bfd_mach_o_section *sect = mdata->sections[j];
1570 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1571 {
1572 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1573 res->addend = symnum - sect->addr;
1574 break;
1575 }
1576 }
1577
1578 /* Extract the info and address fields from r_address. */
1579 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1580 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1581 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1582 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1583 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1584 }
1585 else
1586 {
1587 /* Non-scattered relocation. */
1588 reloc->r_scattered = 0;
1589 reloc->r_address = addr;
1590 res->address = addr;
1591
1592 /* The value and info fields have to be extracted dependent on target
1593 endian-ness. */
1594 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum);
1595
1596 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc,
1597 res, syms))
1598 return false;
1599 }
1600
1601 /* We have set up a reloc with all the information present, so the swapper
1602 can modify address, value and addend fields, if necessary, to convey
1603 information in the generic BFD reloc that is mach-o specific. */
1604
1605 return true;
1606 }
1607
1608 static int
1609 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1610 unsigned long count,
1611 arelent *res, asymbol **syms)
1612 {
1613 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1614 unsigned long i;
1615 struct mach_o_reloc_info_external *native_relocs = NULL;
1616 size_t native_size;
1617
1618 /* Allocate and read relocs. */
1619 if (_bfd_mul_overflow (count, BFD_MACH_O_RELENT_SIZE, &native_size))
1620 /* PR 17512: file: 09477b57. */
1621 goto err;
1622
1623 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
1624 return -1;
1625 native_relocs = (struct mach_o_reloc_info_external *)
1626 _bfd_malloc_and_read (abfd, native_size, native_size);
1627 if (native_relocs == NULL)
1628 return -1;
1629
1630 for (i = 0; i < count; i++)
1631 {
1632 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i],
1633 &res[i], syms, res))
1634 goto err;
1635 }
1636 free (native_relocs);
1637 return i;
1638
1639 err:
1640 free (native_relocs);
1641 if (bfd_get_error () == bfd_error_no_error)
1642 bfd_set_error (bfd_error_invalid_operation);
1643 return -1;
1644 }
1645
1646 long
1647 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1648 arelent **rels, asymbol **syms)
1649 {
1650 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1651 unsigned long i;
1652 arelent *res;
1653
1654 if (asect->reloc_count == 0)
1655 return 0;
1656
1657 /* No need to go further if we don't know how to read relocs. */
1658 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1659 return 0;
1660
1661 if (asect->relocation == NULL)
1662 {
1663 size_t amt;
1664
1665 if (_bfd_mul_overflow (asect->reloc_count, sizeof (arelent), &amt))
1666 return -1;
1667 res = bfd_malloc (amt);
1668 if (res == NULL)
1669 return -1;
1670
1671 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1672 asect->reloc_count, res, syms) < 0)
1673 {
1674 free (res);
1675 return -1;
1676 }
1677 asect->relocation = res;
1678 }
1679
1680 res = asect->relocation;
1681 for (i = 0; i < asect->reloc_count; i++)
1682 rels[i] = &res[i];
1683 rels[i] = NULL;
1684
1685 return i;
1686 }
1687
1688 long
1689 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1690 {
1691 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1692
1693 if (mdata->dysymtab == NULL)
1694 return 1;
1695 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1696 * sizeof (arelent *);
1697 }
1698
1699 long
1700 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1701 struct bfd_symbol **syms)
1702 {
1703 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1704 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1705 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1706 unsigned long i;
1707 arelent *res;
1708
1709 if (dysymtab == NULL)
1710 return 0;
1711 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1712 return 0;
1713
1714 /* No need to go further if we don't know how to read relocs. */
1715 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL)
1716 return 0;
1717
1718 if (mdata->dyn_reloc_cache == NULL)
1719 {
1720 ufile_ptr filesize = bfd_get_file_size (abfd);
1721 size_t amt;
1722
1723 if (filesize != 0)
1724 {
1725 if (dysymtab->extreloff > filesize
1726 || dysymtab->nextrel > ((filesize - dysymtab->extreloff)
1727 / BFD_MACH_O_RELENT_SIZE)
1728 || dysymtab->locreloff > filesize
1729 || dysymtab->nlocrel > ((filesize - dysymtab->locreloff)
1730 / BFD_MACH_O_RELENT_SIZE))
1731 {
1732 bfd_set_error (bfd_error_file_truncated);
1733 return -1;
1734 }
1735 }
1736 if (_bfd_mul_overflow (dysymtab->nextrel + dysymtab->nlocrel,
1737 sizeof (arelent), &amt))
1738 {
1739 bfd_set_error (bfd_error_file_too_big);
1740 return -1;
1741 }
1742
1743 res = bfd_malloc (amt);
1744 if (res == NULL)
1745 return -1;
1746
1747 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1748 dysymtab->nextrel, res, syms) < 0)
1749 {
1750 free (res);
1751 return -1;
1752 }
1753
1754 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1755 dysymtab->nlocrel,
1756 res + dysymtab->nextrel, syms) < 0)
1757 {
1758 free (res);
1759 return -1;
1760 }
1761
1762 mdata->dyn_reloc_cache = res;
1763 }
1764
1765 res = mdata->dyn_reloc_cache;
1766 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1767 rels[i] = &res[i];
1768 rels[i] = NULL;
1769 return i;
1770 }
1771
1772 /* In addition to the need to byte-swap the symbol number, the bit positions
1773 of the fields in the relocation information vary per target endian-ness. */
1774
1775 static void
1776 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1777 bfd_mach_o_reloc_info *rel)
1778 {
1779 unsigned char info = 0;
1780
1781 BFD_ASSERT (rel->r_type <= 15);
1782 BFD_ASSERT (rel->r_length <= 3);
1783
1784 if (bfd_big_endian (abfd))
1785 {
1786 fields[0] = (rel->r_value >> 16) & 0xff;
1787 fields[1] = (rel->r_value >> 8) & 0xff;
1788 fields[2] = rel->r_value & 0xff;
1789 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1790 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1791 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1792 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1793 }
1794 else
1795 {
1796 fields[2] = (rel->r_value >> 16) & 0xff;
1797 fields[1] = (rel->r_value >> 8) & 0xff;
1798 fields[0] = rel->r_value & 0xff;
1799 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1800 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1801 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1802 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1803 }
1804 fields[3] = info;
1805 }
1806
1807 static bool
1808 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1809 {
1810 unsigned int i;
1811 arelent **entries;
1812 asection *sec;
1813 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1814
1815 sec = section->bfdsection;
1816 if (sec->reloc_count == 0)
1817 return true;
1818
1819 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1820 return true;
1821
1822 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1823 return false;
1824
1825 /* Convert and write. */
1826 entries = section->bfdsection->orelocation;
1827 for (i = 0; i < section->nreloc; i++)
1828 {
1829 arelent *rel = entries[i];
1830 struct mach_o_reloc_info_external raw;
1831 bfd_mach_o_reloc_info info, *pinfo = &info;
1832
1833 /* Convert relocation to an intermediate representation. */
1834 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1835 return false;
1836
1837 /* Lower the relocation info. */
1838 if (pinfo->r_scattered)
1839 {
1840 unsigned long v;
1841
1842 v = BFD_MACH_O_SR_SCATTERED
1843 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1844 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1845 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1846 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1847 /* Note: scattered relocs have field in reverse order... */
1848 bfd_put_32 (abfd, v, raw.r_address);
1849 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1850 }
1851 else
1852 {
1853 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1854 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1855 pinfo);
1856 }
1857
1858 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1859 != BFD_MACH_O_RELENT_SIZE)
1860 return false;
1861 }
1862 return true;
1863 }
1864
1865 static bool
1866 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1867 {
1868 struct mach_o_section_32_external raw;
1869
1870 memcpy (raw.sectname, section->sectname, 16);
1871 memcpy (raw.segname, section->segname, 16);
1872 bfd_h_put_32 (abfd, section->addr, raw.addr);
1873 bfd_h_put_32 (abfd, section->size, raw.size);
1874 bfd_h_put_32 (abfd, section->offset, raw.offset);
1875 bfd_h_put_32 (abfd, section->align, raw.align);
1876 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1877 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1878 bfd_h_put_32 (abfd, section->flags, raw.flags);
1879 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1880 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1881
1882 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1883 != BFD_MACH_O_SECTION_SIZE)
1884 return false;
1885
1886 return true;
1887 }
1888
1889 static bool
1890 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1891 {
1892 struct mach_o_section_64_external raw;
1893
1894 memcpy (raw.sectname, section->sectname, 16);
1895 memcpy (raw.segname, section->segname, 16);
1896 bfd_h_put_64 (abfd, section->addr, raw.addr);
1897 bfd_h_put_64 (abfd, section->size, raw.size);
1898 bfd_h_put_32 (abfd, section->offset, raw.offset);
1899 bfd_h_put_32 (abfd, section->align, raw.align);
1900 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1901 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1902 bfd_h_put_32 (abfd, section->flags, raw.flags);
1903 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1904 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1905 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1906
1907 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1908 != BFD_MACH_O_SECTION_64_SIZE)
1909 return false;
1910
1911 return true;
1912 }
1913
1914 static bool
1915 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1916 {
1917 struct mach_o_segment_command_32_external raw;
1918 bfd_mach_o_segment_command *seg = &command->command.segment;
1919 bfd_mach_o_section *sec;
1920
1921 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1922
1923 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1924 if (!bfd_mach_o_write_relocs (abfd, sec))
1925 return false;
1926
1927 memcpy (raw.segname, seg->segname, 16);
1928 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1929 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1930 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1931 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1932 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1933 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1934 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1935 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1936
1937 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1938 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1939 return false;
1940
1941 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1942 if (!bfd_mach_o_write_section_32 (abfd, sec))
1943 return false;
1944
1945 return true;
1946 }
1947
1948 static bool
1949 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1950 {
1951 struct mach_o_segment_command_64_external raw;
1952 bfd_mach_o_segment_command *seg = &command->command.segment;
1953 bfd_mach_o_section *sec;
1954
1955 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1956
1957 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1958 if (!bfd_mach_o_write_relocs (abfd, sec))
1959 return false;
1960
1961 memcpy (raw.segname, seg->segname, 16);
1962 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1963 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1964 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1965 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1966 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1967 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1968 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1969 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1970
1971 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1972 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1973 return false;
1974
1975 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1976 if (!bfd_mach_o_write_section_64 (abfd, sec))
1977 return false;
1978
1979 return true;
1980 }
1981
1982 static bool
1983 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym)
1984 {
1985 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1986 unsigned long i;
1987 unsigned int wide = bfd_mach_o_wide_p (abfd);
1988 struct bfd_strtab_hash *strtab;
1989 asymbol **symbols = bfd_get_outsymbols (abfd);
1990 int padlen;
1991
1992 /* Write the symbols first. */
1993 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1994 return false;
1995
1996 strtab = _bfd_stringtab_init ();
1997 if (strtab == NULL)
1998 return false;
1999
2000 if (sym->nsyms > 0)
2001 /* Although we don't strictly need to do this, for compatibility with
2002 Darwin system tools, actually output an empty string for the index
2003 0 entry. */
2004 _bfd_stringtab_add (strtab, "", true, false);
2005
2006 for (i = 0; i < sym->nsyms; i++)
2007 {
2008 bfd_size_type str_index;
2009 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2010
2011 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
2012 /* An index of 0 always means the empty string. */
2013 str_index = 0;
2014 else
2015 {
2016 str_index = _bfd_stringtab_add (strtab, s->symbol.name, true, false);
2017
2018 if (str_index == (bfd_size_type) -1)
2019 goto err;
2020 }
2021
2022 if (wide)
2023 {
2024 struct mach_o_nlist_64_external raw;
2025
2026 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2027 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2028 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2029 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2030 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
2031 raw.n_value);
2032
2033 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2034 goto err;
2035 }
2036 else
2037 {
2038 struct mach_o_nlist_external raw;
2039
2040 bfd_h_put_32 (abfd, str_index, raw.n_strx);
2041 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
2042 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
2043 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
2044 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
2045 raw.n_value);
2046
2047 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2048 goto err;
2049 }
2050 }
2051 sym->strsize = _bfd_stringtab_size (strtab);
2052 sym->stroff = mdata->filelen;
2053 mdata->filelen += sym->strsize;
2054
2055 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
2056 goto err;
2057
2058 if (!_bfd_stringtab_emit (abfd, strtab))
2059 goto err;
2060
2061 /* Pad string table. */
2062 padlen = bfd_mach_o_pad4 (abfd, sym->strsize);
2063 if (padlen < 0)
2064 return false;
2065 mdata->filelen += padlen;
2066 sym->strsize += padlen;
2067
2068 return true;
2069
2070 err:
2071 _bfd_stringtab_free (strtab);
2072 sym->strsize = 0;
2073 return false;
2074 }
2075
2076 static bool
2077 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
2078 {
2079 bfd_mach_o_symtab_command *sym = &command->command.symtab;
2080 struct mach_o_symtab_command_external raw;
2081
2082 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
2083
2084 /* The command. */
2085 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
2086 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
2087 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
2088 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
2089
2090 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
2091 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2092 return false;
2093
2094 return true;
2095 }
2096
2097 /* Count the number of indirect symbols in the image.
2098 Requires that the sections are in their final order. */
2099
2100 static unsigned int
2101 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2102 {
2103 unsigned int i;
2104 unsigned int nisyms = 0;
2105
2106 for (i = 0; i < mdata->nsects; ++i)
2107 {
2108 bfd_mach_o_section *sec = mdata->sections[i];
2109
2110 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2111 {
2112 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2113 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2114 case BFD_MACH_O_S_SYMBOL_STUBS:
2115 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2116 break;
2117 default:
2118 break;
2119 }
2120 }
2121 return nisyms;
2122 }
2123
2124 /* Create the dysymtab. */
2125
2126 static bool
2127 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd)
2128 {
2129 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2130
2131 /* TODO:
2132 We are not going to try and fill these in yet and, moreover, we are
2133 going to bail if they are already set. */
2134 if (cmd->nmodtab != 0
2135 || cmd->ntoc != 0
2136 || cmd->nextrefsyms != 0)
2137 {
2138 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet"
2139 " implemented for dysymtab commands."));
2140 return false;
2141 }
2142
2143 cmd->ilocalsym = 0;
2144
2145 if (bfd_get_symcount (abfd) > 0)
2146 {
2147 asymbol **symbols = bfd_get_outsymbols (abfd);
2148 unsigned long i;
2149
2150 /* Count the number of each kind of symbol. */
2151 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2152 {
2153 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2154 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2155 break;
2156 }
2157 cmd->nlocalsym = i;
2158 cmd->iextdefsym = i;
2159 for (; i < bfd_get_symcount (abfd); ++i)
2160 {
2161 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2162 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2163 break;
2164 }
2165 cmd->nextdefsym = i - cmd->nlocalsym;
2166 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym;
2167 cmd->nundefsym = bfd_get_symcount (abfd)
2168 - cmd->nlocalsym
2169 - cmd->nextdefsym;
2170 }
2171 else
2172 {
2173 cmd->nlocalsym = 0;
2174 cmd->iextdefsym = 0;
2175 cmd->nextdefsym = 0;
2176 cmd->iundefsym = 0;
2177 cmd->nundefsym = 0;
2178 }
2179
2180 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2181 if (cmd->nindirectsyms > 0)
2182 {
2183 unsigned i;
2184 unsigned n;
2185 size_t amt;
2186
2187 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2188 cmd->indirectsymoff = mdata->filelen;
2189 if (_bfd_mul_overflow (cmd->nindirectsyms, 4, &amt))
2190 return false;
2191 mdata->filelen += amt;
2192
2193 cmd->indirect_syms = bfd_zalloc (abfd, amt);
2194 if (cmd->indirect_syms == NULL)
2195 return false;
2196
2197 n = 0;
2198 for (i = 0; i < mdata->nsects; ++i)
2199 {
2200 bfd_mach_o_section *sec = mdata->sections[i];
2201
2202 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2203 {
2204 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2205 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2206 case BFD_MACH_O_S_SYMBOL_STUBS:
2207 {
2208 unsigned j, num;
2209 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2210
2211 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2212 if (isyms == NULL || num == 0)
2213 break;
2214 /* Record the starting index in the reserved1 field. */
2215 sec->reserved1 = n;
2216 for (j = 0; j < num; j++, n++)
2217 {
2218 if (isyms[j] == NULL)
2219 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2220 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2221 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2222 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2223 | BFD_MACH_O_INDIRECT_SYM_ABS;
2224 else
2225 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i;
2226 }
2227 }
2228 break;
2229 default:
2230 break;
2231 }
2232 }
2233 }
2234
2235 return true;
2236 }
2237
2238 /* Write a dysymtab command.
2239 TODO: Possibly coalesce writes of smaller objects. */
2240
2241 static bool
2242 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
2243 {
2244 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
2245
2246 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
2247
2248 if (cmd->nmodtab != 0)
2249 {
2250 unsigned int i;
2251
2252 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
2253 return false;
2254
2255 for (i = 0; i < cmd->nmodtab; i++)
2256 {
2257 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
2258 unsigned int iinit;
2259 unsigned int ninit;
2260
2261 iinit = module->iinit & 0xffff;
2262 iinit |= ((module->iterm & 0xffff) << 16);
2263
2264 ninit = module->ninit & 0xffff;
2265 ninit |= ((module->nterm & 0xffff) << 16);
2266
2267 if (bfd_mach_o_wide_p (abfd))
2268 {
2269 struct mach_o_dylib_module_64_external w;
2270
2271 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
2272 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
2273 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
2274 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
2275 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
2276 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
2277 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
2278 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
2279 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
2280 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
2281 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
2282 bfd_h_put_64 (abfd, module->objc_module_info_addr,
2283 &w.objc_module_info_addr);
2284 bfd_h_put_32 (abfd, module->objc_module_info_size,
2285 &w.objc_module_info_size);
2286
2287 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
2288 return false;
2289 }
2290 else
2291 {
2292 struct mach_o_dylib_module_external n;
2293
2294 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
2295 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
2296 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
2297 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
2298 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
2299 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
2300 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
2301 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
2302 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
2303 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
2304 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
2305 bfd_h_put_32 (abfd, module->objc_module_info_addr,
2306 &n.objc_module_info_addr);
2307 bfd_h_put_32 (abfd, module->objc_module_info_size,
2308 &n.objc_module_info_size);
2309
2310 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
2311 return false;
2312 }
2313 }
2314 }
2315
2316 if (cmd->ntoc != 0)
2317 {
2318 unsigned int i;
2319
2320 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
2321 return false;
2322
2323 for (i = 0; i < cmd->ntoc; i++)
2324 {
2325 struct mach_o_dylib_table_of_contents_external raw;
2326 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
2327
2328 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
2329 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
2330
2331 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2332 return false;
2333 }
2334 }
2335
2336 if (cmd->nindirectsyms > 0)
2337 {
2338 unsigned int i;
2339
2340 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
2341 return false;
2342
2343 for (i = 0; i < cmd->nindirectsyms; ++i)
2344 {
2345 unsigned char raw[4];
2346
2347 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
2348 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2349 return false;
2350 }
2351 }
2352
2353 if (cmd->nextrefsyms != 0)
2354 {
2355 unsigned int i;
2356
2357 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
2358 return false;
2359
2360 for (i = 0; i < cmd->nextrefsyms; i++)
2361 {
2362 unsigned long v;
2363 unsigned char raw[4];
2364 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
2365
2366 /* Fields isym and flags are written as bit-fields, thus we need
2367 a specific processing for endianness. */
2368
2369 if (bfd_big_endian (abfd))
2370 {
2371 v = ((ref->isym & 0xffffff) << 8);
2372 v |= ref->flags & 0xff;
2373 }
2374 else
2375 {
2376 v = ref->isym & 0xffffff;
2377 v |= ((ref->flags & 0xff) << 24);
2378 }
2379
2380 bfd_h_put_32 (abfd, v, raw);
2381 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
2382 return false;
2383 }
2384 }
2385
2386 /* The command. */
2387 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
2388 return false;
2389 else
2390 {
2391 struct mach_o_dysymtab_command_external raw;
2392
2393 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
2394 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
2395 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
2396 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
2397 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
2398 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
2399 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
2400 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
2401 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
2402 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
2403 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
2404 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
2405 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
2406 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
2407 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
2408 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
2409 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
2410 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
2411
2412 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
2413 return false;
2414 }
2415
2416 return true;
2417 }
2418
2419 static unsigned
2420 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
2421 {
2422 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
2423
2424 /* Just leave debug symbols where they are (pretend they are local, and
2425 then they will just be sorted on position). */
2426 if (s->n_type & BFD_MACH_O_N_STAB)
2427 return 0;
2428
2429 /* Local (we should never see an undefined local AFAICT). */
2430 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
2431 return 0;
2432
2433 /* Common symbols look like undefined externs. */
2434 if (mtyp == BFD_MACH_O_N_UNDF)
2435 return 2;
2436
2437 /* A defined non-local, non-debug symbol. */
2438 return 1;
2439 }
2440
2441 static int
2442 bfd_mach_o_cf_symbols (const void *a, const void *b)
2443 {
2444 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
2445 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
2446 unsigned int soa, sob;
2447
2448 soa = bfd_mach_o_primary_symbol_sort_key (sa);
2449 sob = bfd_mach_o_primary_symbol_sort_key (sb);
2450 if (soa < sob)
2451 return -1;
2452
2453 if (soa > sob)
2454 return 1;
2455
2456 /* If it's local or stab, just preserve the input order. */
2457 if (soa == 0)
2458 {
2459 if (sa->symbol.udata.i < sb->symbol.udata.i)
2460 return -1;
2461 if (sa->symbol.udata.i > sb->symbol.udata.i)
2462 return 1;
2463
2464 /* This is probably an error. */
2465 return 0;
2466 }
2467
2468 /* The second sort key is name. */
2469 return strcmp (sa->symbol.name, sb->symbol.name);
2470 }
2471
2472 /* Process the symbols.
2473
2474 This should be OK for single-module files - but it is not likely to work
2475 for multi-module shared libraries.
2476
2477 (a) If the application has not filled in the relevant mach-o fields, make
2478 an estimate.
2479
2480 (b) Order them, like this:
2481 ( i) local.
2482 (unsorted)
2483 ( ii) external defined
2484 (by name)
2485 (iii) external undefined/common
2486 (by name)
2487 ( iv) common
2488 (by name)
2489 */
2490
2491 static bool
2492 bfd_mach_o_mangle_symbols (bfd *abfd)
2493 {
2494 unsigned long i;
2495 asymbol **symbols = bfd_get_outsymbols (abfd);
2496
2497 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
2498 return true;
2499
2500 for (i = 0; i < bfd_get_symcount (abfd); i++)
2501 {
2502 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2503
2504 /* We use this value, which is out-of-range as a symbol index, to signal
2505 that the mach-o-specific data are not filled in and need to be created
2506 from the bfd values. It is much preferable for the application to do
2507 this, since more meaningful diagnostics can be made that way. */
2508
2509 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
2510 {
2511 /* No symbol information has been set - therefore determine
2512 it from the bfd symbol flags/info. */
2513 if (s->symbol.section == bfd_abs_section_ptr)
2514 s->n_type = BFD_MACH_O_N_ABS;
2515 else if (s->symbol.section == bfd_und_section_ptr)
2516 {
2517 s->n_type = BFD_MACH_O_N_UNDF;
2518 if (s->symbol.flags & BSF_WEAK)
2519 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
2520 /* mach-o automatically makes undefined symbols extern. */
2521 s->n_type |= BFD_MACH_O_N_EXT;
2522 s->symbol.flags |= BSF_GLOBAL;
2523 }
2524 else if (s->symbol.section == bfd_com_section_ptr)
2525 {
2526 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
2527 s->symbol.flags |= BSF_GLOBAL;
2528 }
2529 else
2530 s->n_type = BFD_MACH_O_N_SECT;
2531 }
2532
2533 /* Update external symbol bit in case objcopy changed it. */
2534 if (s->symbol.flags & BSF_GLOBAL)
2535 s->n_type |= BFD_MACH_O_N_EXT;
2536 else
2537 s->n_type &= ~BFD_MACH_O_N_EXT;
2538
2539 /* Put the section index in, where required. */
2540 if ((s->symbol.section != bfd_abs_section_ptr
2541 && s->symbol.section != bfd_und_section_ptr
2542 && s->symbol.section != bfd_com_section_ptr)
2543 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
2544 && s->symbol.name == NULL))
2545 s->n_sect = s->symbol.section->output_section->target_index;
2546
2547 /* Number to preserve order for local and debug syms. */
2548 s->symbol.udata.i = i;
2549 }
2550
2551 /* Sort the symbols. */
2552 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
2553 sizeof (asymbol *), bfd_mach_o_cf_symbols);
2554
2555 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2556 {
2557 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2558 s->symbol.udata.i = i; /* renumber. */
2559 }
2560
2561 return true;
2562 }
2563
2564 /* We build a flat table of sections, which can be re-ordered if necessary.
2565 Fill in the section number and other mach-o-specific data. */
2566
2567 static bool
2568 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
2569 {
2570 asection *sec;
2571 unsigned target_index;
2572 unsigned nsect;
2573 size_t amt;
2574
2575 nsect = bfd_count_sections (abfd);
2576
2577 /* Don't do it if it's already set - assume the application knows what it's
2578 doing. */
2579 if (mdata->nsects == nsect
2580 && (mdata->nsects == 0 || mdata->sections != NULL))
2581 return true;
2582
2583 /* We need to check that this can be done... */
2584 if (nsect > 255)
2585 {
2586 _bfd_error_handler (_("mach-o: there are too many sections (%u)"
2587 " maximum is 255,\n"), nsect);
2588 return false;
2589 }
2590
2591 mdata->nsects = nsect;
2592 amt = mdata->nsects * sizeof (bfd_mach_o_section *);
2593 mdata->sections = bfd_alloc (abfd, amt);
2594 if (mdata->sections == NULL)
2595 return false;
2596
2597 /* Create Mach-O sections.
2598 Section type, attribute and align should have been set when the
2599 section was created - either read in or specified. */
2600 target_index = 0;
2601 for (sec = abfd->sections; sec; sec = sec->next)
2602 {
2603 unsigned bfd_align = bfd_section_alignment (sec);
2604 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
2605
2606 mdata->sections[target_index] = msect;
2607
2608 msect->addr = bfd_section_vma (sec);
2609 msect->size = bfd_section_size (sec);
2610
2611 /* Use the largest alignment set, in case it was bumped after the
2612 section was created. */
2613 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
2614
2615 msect->offset = 0;
2616 sec->target_index = ++target_index;
2617 }
2618
2619 return true;
2620 }
2621
2622 bool
2623 bfd_mach_o_write_contents (bfd *abfd)
2624 {
2625 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2626 bfd_mach_o_load_command *cmd;
2627 bfd_mach_o_symtab_command *symtab = NULL;
2628 bfd_mach_o_dysymtab_command *dysymtab = NULL;
2629 bfd_mach_o_segment_command *linkedit = NULL;
2630
2631 /* Make the commands, if not already present. */
2632 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
2633 return false;
2634 abfd->output_has_begun = true;
2635
2636 /* Write the header. */
2637 if (!bfd_mach_o_write_header (abfd, &mdata->header))
2638 return false;
2639
2640 /* First pass: allocate the linkedit segment. */
2641 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2642 switch (cmd->type)
2643 {
2644 case BFD_MACH_O_LC_SEGMENT_64:
2645 case BFD_MACH_O_LC_SEGMENT:
2646 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0)
2647 linkedit = &cmd->command.segment;
2648 break;
2649 case BFD_MACH_O_LC_SYMTAB:
2650 symtab = &cmd->command.symtab;
2651 break;
2652 case BFD_MACH_O_LC_DYSYMTAB:
2653 dysymtab = &cmd->command.dysymtab;
2654 break;
2655 case BFD_MACH_O_LC_DYLD_INFO:
2656 {
2657 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info;
2658
2659 if (di->rebase_size != 0)
2660 {
2661 di->rebase_off = mdata->filelen;
2662 mdata->filelen += di->rebase_size;
2663 }
2664 if (di->bind_size != 0)
2665 {
2666 di->bind_off = mdata->filelen;
2667 mdata->filelen += di->bind_size;
2668 }
2669 if (di->weak_bind_size != 0)
2670 {
2671 di->weak_bind_off = mdata->filelen;
2672 mdata->filelen += di->weak_bind_size;
2673 }
2674 if (di->lazy_bind_size != 0)
2675 {
2676 di->lazy_bind_off = mdata->filelen;
2677 mdata->filelen += di->lazy_bind_size;
2678 }
2679 if (di->export_size != 0)
2680 {
2681 di->export_off = mdata->filelen;
2682 mdata->filelen += di->export_size;
2683 }
2684 }
2685 break;
2686 case BFD_MACH_O_LC_LOAD_DYLIB:
2687 case BFD_MACH_O_LC_LOAD_DYLINKER:
2688 case BFD_MACH_O_LC_MAIN:
2689 /* Nothing to do. */
2690 break;
2691 default:
2692 _bfd_error_handler
2693 (_("unable to allocate data for load command %#x"),
2694 cmd->type);
2695 break;
2696 }
2697
2698 /* Specially handle symtab and dysymtab. */
2699
2700 /* Pre-allocate the symbol table (but not the string table). The reason
2701 is that the dysymtab is after the symbol table but before the string
2702 table (required by the native strip tool). */
2703 if (symtab != NULL)
2704 {
2705 unsigned int symlen;
2706 unsigned int wide = bfd_mach_o_wide_p (abfd);
2707
2708 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2709
2710 /* Align for symbols. */
2711 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
2712 symtab->symoff = mdata->filelen;
2713
2714 symtab->nsyms = bfd_get_symcount (abfd);
2715 mdata->filelen += symtab->nsyms * symlen;
2716 }
2717
2718 /* Build the dysymtab. */
2719 if (dysymtab != NULL)
2720 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab))
2721 return false;
2722
2723 /* Write symtab and strtab. */
2724 if (symtab != NULL)
2725 if (!bfd_mach_o_write_symtab_content (abfd, symtab))
2726 return false;
2727
2728 /* Adjust linkedit size. */
2729 if (linkedit != NULL)
2730 {
2731 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */
2732
2733 linkedit->vmsize = mdata->filelen - linkedit->fileoff;
2734 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */
2735 linkedit->filesize = mdata->filelen - linkedit->fileoff;
2736
2737 linkedit->initprot = BFD_MACH_O_PROT_READ;
2738 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2739 | BFD_MACH_O_PROT_EXECUTE;
2740 }
2741
2742 /* Second pass: write commands. */
2743 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
2744 {
2745 struct mach_o_load_command_external raw;
2746 unsigned long typeflag;
2747
2748 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
2749
2750 bfd_h_put_32 (abfd, typeflag, raw.cmd);
2751 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize);
2752
2753 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0
2754 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
2755 return false;
2756
2757 switch (cmd->type)
2758 {
2759 case BFD_MACH_O_LC_SEGMENT:
2760 if (!bfd_mach_o_write_segment_32 (abfd, cmd))
2761 return false;
2762 break;
2763 case BFD_MACH_O_LC_SEGMENT_64:
2764 if (!bfd_mach_o_write_segment_64 (abfd, cmd))
2765 return false;
2766 break;
2767 case BFD_MACH_O_LC_SYMTAB:
2768 if (!bfd_mach_o_write_symtab (abfd, cmd))
2769 return false;
2770 break;
2771 case BFD_MACH_O_LC_DYSYMTAB:
2772 if (!bfd_mach_o_write_dysymtab (abfd, cmd))
2773 return false;
2774 break;
2775 case BFD_MACH_O_LC_THREAD:
2776 case BFD_MACH_O_LC_UNIXTHREAD:
2777 if (!bfd_mach_o_write_thread (abfd, cmd))
2778 return false;
2779 break;
2780 case BFD_MACH_O_LC_LOAD_DYLIB:
2781 if (!bfd_mach_o_write_dylib (abfd, cmd))
2782 return false;
2783 break;
2784 case BFD_MACH_O_LC_LOAD_DYLINKER:
2785 if (!bfd_mach_o_write_dylinker (abfd, cmd))
2786 return false;
2787 break;
2788 case BFD_MACH_O_LC_MAIN:
2789 if (!bfd_mach_o_write_main (abfd, cmd))
2790 return false;
2791 break;
2792 case BFD_MACH_O_LC_DYLD_INFO:
2793 if (!bfd_mach_o_write_dyld_info (abfd, cmd))
2794 return false;
2795 break;
2796 default:
2797 _bfd_error_handler
2798 (_("unable to write unknown load command %#x"),
2799 cmd->type);
2800 return false;
2801 }
2802 }
2803
2804 return true;
2805 }
2806
2807 static void
2808 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2809 bfd_mach_o_section *s)
2810 {
2811 if (seg->sect_head == NULL)
2812 seg->sect_head = s;
2813 else
2814 seg->sect_tail->next = s;
2815 seg->sect_tail = s;
2816 }
2817
2818 /* Create section Mach-O flags from BFD flags. */
2819
2820 static void
2821 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2822 asection *sec)
2823 {
2824 flagword bfd_flags;
2825 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2826
2827 /* Create default flags. */
2828 bfd_flags = bfd_section_flags (sec);
2829 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2830 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2831 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2832 | BFD_MACH_O_S_REGULAR;
2833 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2834 s->flags = BFD_MACH_O_S_ZEROFILL;
2835 else if (bfd_flags & SEC_DEBUGGING)
2836 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2837 else
2838 s->flags = BFD_MACH_O_S_REGULAR;
2839 }
2840
2841 static bool
2842 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2843 {
2844 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2845 unsigned int i, j;
2846
2847 seg->vmaddr = 0;
2848 seg->fileoff = mdata->filelen;
2849 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2850 | BFD_MACH_O_PROT_EXECUTE;
2851 seg->maxprot = seg->initprot;
2852
2853 /* Append sections to the segment.
2854
2855 This is a little tedious, we have to honor the need to account zerofill
2856 sections after all the rest. This forces us to do the calculation of
2857 total vmsize in three passes so that any alignment increments are
2858 properly accounted. */
2859 for (i = 0; i < mdata->nsects; ++i)
2860 {
2861 bfd_mach_o_section *s = mdata->sections[i];
2862 asection *sec = s->bfdsection;
2863
2864 /* Although we account for zerofill section sizes in vm order, they are
2865 placed in the file in source sequence. */
2866 bfd_mach_o_append_section_to_segment (seg, s);
2867 s->offset = 0;
2868
2869 /* Zerofill sections have zero file size & offset, the only content
2870 written to the file is the symbols. */
2871 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2872 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2873 == BFD_MACH_O_S_GB_ZEROFILL))
2874 continue;
2875
2876 /* The Darwin system tools (in MH_OBJECT files, at least) always account
2877 sections, even those with zero size. */
2878 if (s->size > 0)
2879 {
2880 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2881 seg->vmsize += s->size;
2882
2883 /* MH_OBJECT files have unaligned content. */
2884 if (1)
2885 {
2886 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2887 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2888 }
2889 seg->filesize += s->size;
2890
2891 /* The system tools write even zero-sized sections with an offset
2892 field set to the current file position. */
2893 s->offset = mdata->filelen;
2894 }
2895
2896 sec->filepos = s->offset;
2897 mdata->filelen += s->size;
2898 }
2899
2900 /* Now pass through again, for zerofill, only now we just update the
2901 vmsize, and then for zerofill_GB. */
2902 for (j = 0; j < 2; j++)
2903 {
2904 unsigned int stype;
2905
2906 if (j == 0)
2907 stype = BFD_MACH_O_S_ZEROFILL;
2908 else
2909 stype = BFD_MACH_O_S_GB_ZEROFILL;
2910
2911 for (i = 0; i < mdata->nsects; ++i)
2912 {
2913 bfd_mach_o_section *s = mdata->sections[i];
2914
2915 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype)
2916 continue;
2917
2918 if (s->size > 0)
2919 {
2920 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2921 seg->vmsize += s->size;
2922 }
2923 }
2924 }
2925
2926 /* Allocate space for the relocations. */
2927 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2928
2929 for (i = 0; i < mdata->nsects; ++i)
2930 {
2931 bfd_mach_o_section *ms = mdata->sections[i];
2932 asection *sec = ms->bfdsection;
2933
2934 ms->nreloc = sec->reloc_count;
2935 if (ms->nreloc == 0)
2936 {
2937 /* Clear nreloc and reloff if there is no relocs. */
2938 ms->reloff = 0;
2939 continue;
2940 }
2941 sec->rel_filepos = mdata->filelen;
2942 ms->reloff = sec->rel_filepos;
2943 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2944 }
2945
2946 return true;
2947 }
2948
2949 static bool
2950 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg)
2951 {
2952 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2953 unsigned int i;
2954 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1;
2955 bfd_vma vma;
2956 bfd_mach_o_section *s;
2957
2958 seg->vmsize = 0;
2959
2960 seg->fileoff = mdata->filelen;
2961 seg->maxprot = 0;
2962 seg->initprot = 0;
2963 seg->flags = 0;
2964
2965 /* Append sections to the segment. We assume they are properly ordered
2966 by vma (but we check that). */
2967 vma = 0;
2968 for (i = 0; i < mdata->nsects; ++i)
2969 {
2970 s = mdata->sections[i];
2971
2972 /* Consider only sections for this segment. */
2973 if (strcmp (seg->segname, s->segname) != 0)
2974 continue;
2975
2976 bfd_mach_o_append_section_to_segment (seg, s);
2977
2978 if (s->addr < vma)
2979 {
2980 _bfd_error_handler
2981 /* xgettext:c-format */
2982 (_("section address (%#" PRIx64 ") "
2983 "below start of segment (%#" PRIx64 ")"),
2984 (uint64_t) s->addr, (uint64_t) vma);
2985 return false;
2986 }
2987
2988 vma = s->addr + s->size;
2989 }
2990
2991 /* Set segment file offset: make it page aligned. */
2992 vma = seg->sect_head->addr;
2993 seg->vmaddr = vma & ~pagemask;
2994 if ((mdata->filelen & pagemask) > (vma & pagemask))
2995 mdata->filelen += pagemask + 1;
2996 seg->fileoff = mdata->filelen & ~pagemask;
2997 mdata->filelen = seg->fileoff + (vma & pagemask);
2998
2999 /* Set section file offset. */
3000 for (s = seg->sect_head; s != NULL; s = s->next)
3001 {
3002 asection *sec = s->bfdsection;
3003 flagword flags = bfd_section_flags (sec);
3004
3005 /* Adjust segment size. */
3006 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
3007 seg->vmsize += s->size;
3008
3009 /* File offset and length. */
3010 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
3011
3012 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL
3013 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3014 != BFD_MACH_O_S_GB_ZEROFILL))
3015 {
3016 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
3017
3018 s->offset = mdata->filelen;
3019 s->bfdsection->filepos = s->offset;
3020
3021 seg->filesize += s->size;
3022 mdata->filelen += s->size;
3023 }
3024 else
3025 {
3026 s->offset = 0;
3027 s->bfdsection->filepos = 0;
3028 }
3029
3030 /* Set protection. */
3031 if (flags & SEC_LOAD)
3032 {
3033 if (flags & SEC_CODE)
3034 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE;
3035 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA)
3036 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ;
3037 }
3038
3039 /* Relocs shouldn't appear in non-object files. */
3040 if (s->bfdsection->reloc_count != 0)
3041 return false;
3042 }
3043
3044 /* Set maxprot. */
3045 if (seg->initprot != 0)
3046 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
3047 | BFD_MACH_O_PROT_EXECUTE;
3048 else
3049 seg->maxprot = 0;
3050
3051 /* Round segment size (and file size). */
3052 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask;
3053 seg->filesize = (seg->filesize + pagemask) & ~pagemask;
3054 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask;
3055
3056 return true;
3057 }
3058
3059 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds
3060 fields in header. */
3061
3062 static bool
3063 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata)
3064 {
3065 unsigned wide = mach_o_wide_p (&mdata->header);
3066 unsigned int hdrlen;
3067 ufile_ptr offset;
3068 bfd_mach_o_load_command *cmd;
3069 unsigned int align;
3070 bool ret = true;
3071
3072 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3073 align = wide ? 8 - 1 : 4 - 1;
3074 offset = hdrlen;
3075 mdata->header.ncmds = 0;
3076
3077 for (cmd = mdata->first_command; cmd; cmd = cmd->next)
3078 {
3079 mdata->header.ncmds++;
3080 cmd->offset = offset;
3081
3082 switch (cmd->type)
3083 {
3084 case BFD_MACH_O_LC_SEGMENT_64:
3085 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
3086 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects;
3087 break;
3088 case BFD_MACH_O_LC_SEGMENT:
3089 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
3090 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects;
3091 break;
3092 case BFD_MACH_O_LC_SYMTAB:
3093 cmd->len = sizeof (struct mach_o_symtab_command_external)
3094 + BFD_MACH_O_LC_SIZE;
3095 break;
3096 case BFD_MACH_O_LC_DYSYMTAB:
3097 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
3098 + BFD_MACH_O_LC_SIZE;
3099 break;
3100 case BFD_MACH_O_LC_LOAD_DYLIB:
3101 cmd->len = sizeof (struct mach_o_dylib_command_external)
3102 + BFD_MACH_O_LC_SIZE;
3103 cmd->command.dylib.name_offset = cmd->len;
3104 cmd->len += strlen (cmd->command.dylib.name_str);
3105 cmd->len = (cmd->len + align) & ~align;
3106 break;
3107 case BFD_MACH_O_LC_LOAD_DYLINKER:
3108 cmd->len = sizeof (struct mach_o_str_command_external)
3109 + BFD_MACH_O_LC_SIZE;
3110 cmd->command.dylinker.name_offset = cmd->len;
3111 cmd->len += strlen (cmd->command.dylinker.name_str);
3112 cmd->len = (cmd->len + align) & ~align;
3113 break;
3114 case BFD_MACH_O_LC_MAIN:
3115 cmd->len = sizeof (struct mach_o_entry_point_command_external)
3116 + BFD_MACH_O_LC_SIZE;
3117 break;
3118 case BFD_MACH_O_LC_DYLD_INFO:
3119 cmd->len = sizeof (struct mach_o_dyld_info_command_external)
3120 + BFD_MACH_O_LC_SIZE;
3121 break;
3122 default:
3123 _bfd_error_handler
3124 (_("unable to layout unknown load command %#x"),
3125 cmd->type);
3126 ret = false;
3127 break;
3128 }
3129
3130 BFD_ASSERT (cmd->len % (align + 1) == 0);
3131 offset += cmd->len;
3132 }
3133 mdata->header.sizeofcmds = offset - hdrlen;
3134 mdata->filelen = offset;
3135
3136 return ret;
3137 }
3138
3139 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a
3140 segment. */
3141
3142 static void
3143 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata,
3144 bfd_mach_o_load_command *cmd,
3145 const char *segname, unsigned int nbr_sect)
3146 {
3147 bfd_mach_o_segment_command *seg = &cmd->command.segment;
3148 unsigned wide = mach_o_wide_p (&mdata->header);
3149
3150 /* Init segment command. */
3151 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT;
3152 cmd->type_required = false;
3153
3154 strcpy (seg->segname, segname);
3155 seg->nsects = nbr_sect;
3156
3157 seg->vmaddr = 0;
3158 seg->vmsize = 0;
3159
3160 seg->fileoff = 0;
3161 seg->filesize = 0;
3162 seg->maxprot = 0;
3163 seg->initprot = 0;
3164 seg->flags = 0;
3165 seg->sect_head = NULL;
3166 seg->sect_tail = NULL;
3167 }
3168
3169 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
3170 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
3171 and copy functionality. */
3172
3173 bool
3174 bfd_mach_o_build_commands (bfd *abfd)
3175 {
3176 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3177 unsigned wide = mach_o_wide_p (&mdata->header);
3178 unsigned int nbr_segcmd = 0;
3179 bfd_mach_o_load_command *commands;
3180 unsigned int nbr_commands;
3181 int symtab_idx = -1;
3182 int dysymtab_idx = -1;
3183 int main_idx = -1;
3184 unsigned int i;
3185
3186 /* Return now if already built. */
3187 if (mdata->header.ncmds != 0)
3188 return true;
3189
3190 /* Fill in the file type, if not already set. */
3191 if (mdata->header.filetype == 0)
3192 {
3193 if (abfd->flags & EXEC_P)
3194 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
3195 else if (abfd->flags & DYNAMIC)
3196 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
3197 else
3198 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
3199 }
3200
3201 /* If hasn't already been done, flatten sections list, and sort
3202 if/when required. Must be done before the symbol table is adjusted,
3203 since that depends on properly numbered sections. */
3204 if (mdata->nsects == 0 || mdata->sections == NULL)
3205 if (! bfd_mach_o_mangle_sections (abfd, mdata))
3206 return false;
3207
3208 /* Order the symbol table, fill-in/check mach-o specific fields and
3209 partition out any indirect symbols. */
3210 if (!bfd_mach_o_mangle_symbols (abfd))
3211 return false;
3212
3213 /* Segment commands. */
3214 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3215 {
3216 /* Only one segment for all the sections. But the segment is
3217 optional if there is no sections. */
3218 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0;
3219 }
3220 else
3221 {
3222 bfd_mach_o_section *prev_sect = NULL;
3223
3224 /* One pagezero segment and one linkedit segment. */
3225 nbr_segcmd = 2;
3226
3227 /* Create one segment for associated segment name in sections.
3228 Assume that sections with the same segment name are consecutive. */
3229 for (i = 0; i < mdata->nsects; i++)
3230 {
3231 bfd_mach_o_section *this_sect = mdata->sections[i];
3232
3233 if (prev_sect == NULL
3234 || strcmp (prev_sect->segname, this_sect->segname) != 0)
3235 {
3236 nbr_segcmd++;
3237 prev_sect = this_sect;
3238 }
3239 }
3240 }
3241
3242 nbr_commands = nbr_segcmd;
3243
3244 /* One command for the symbol table (only if there are symbols. */
3245 if (bfd_get_symcount (abfd) > 0)
3246 symtab_idx = nbr_commands++;
3247
3248 /* FIXME:
3249 This is a rather crude test for whether we should build a dysymtab. */
3250 if (bfd_mach_o_should_emit_dysymtab ()
3251 && bfd_get_symcount (abfd))
3252 {
3253 /* If there should be a case where a dysymtab could be emitted without
3254 a symtab (seems improbable), this would need amending. */
3255 dysymtab_idx = nbr_commands++;
3256 }
3257
3258 /* Add an entry point command. */
3259 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE
3260 && bfd_get_start_address (abfd) != 0)
3261 main_idx = nbr_commands++;
3262
3263 /* Well, we must have a header, at least. */
3264 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3265
3266 /* A bit unusual, but no content is valid;
3267 as -n empty.s -o empty.o */
3268 if (nbr_commands == 0)
3269 {
3270 /* Layout commands (well none...) and set headers command fields. */
3271 return bfd_mach_o_layout_commands (mdata);
3272 }
3273
3274 /* Create commands for segments (and symtabs), prepend them. */
3275 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command));
3276 if (commands == NULL)
3277 return false;
3278 for (i = 0; i < nbr_commands - 1; i++)
3279 commands[i].next = &commands[i + 1];
3280 commands[nbr_commands - 1].next = mdata->first_command;
3281 if (mdata->first_command == NULL)
3282 mdata->last_command = &commands[nbr_commands - 1];
3283 mdata->first_command = &commands[0];
3284
3285 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0)
3286 {
3287 /* For object file, there is only one segment. */
3288 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects);
3289 }
3290 else if (nbr_segcmd != 0)
3291 {
3292 bfd_mach_o_load_command *cmd;
3293
3294 BFD_ASSERT (nbr_segcmd >= 2);
3295
3296 /* The pagezero. */
3297 cmd = &commands[0];
3298 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0);
3299
3300 /* Segments from sections. */
3301 cmd++;
3302 for (i = 0; i < mdata->nsects;)
3303 {
3304 const char *segname = mdata->sections[i]->segname;
3305 unsigned int nbr_sect = 1;
3306
3307 /* Count number of sections for this segment. */
3308 for (i++; i < mdata->nsects; i++)
3309 if (strcmp (mdata->sections[i]->segname, segname) == 0)
3310 nbr_sect++;
3311 else
3312 break;
3313
3314 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect);
3315 cmd++;
3316 }
3317
3318 /* The linkedit. */
3319 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0);
3320 }
3321
3322 if (symtab_idx >= 0)
3323 {
3324 /* Init symtab command. */
3325 bfd_mach_o_load_command *cmd = &commands[symtab_idx];
3326
3327 cmd->type = BFD_MACH_O_LC_SYMTAB;
3328 cmd->type_required = false;
3329 }
3330
3331 /* If required, setup symtab command, see comment above about the quality
3332 of this test. */
3333 if (dysymtab_idx >= 0)
3334 {
3335 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx];
3336
3337 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
3338 cmd->type_required = false;
3339 }
3340
3341 /* Create the main command. */
3342 if (main_idx >= 0)
3343 {
3344 bfd_mach_o_load_command *cmd = &commands[main_idx];
3345
3346 cmd->type = BFD_MACH_O_LC_MAIN;
3347 cmd->type_required = true;
3348
3349 cmd->command.main.entryoff = 0;
3350 cmd->command.main.stacksize = 0;
3351 }
3352
3353 /* Layout commands. */
3354 if (! bfd_mach_o_layout_commands (mdata))
3355 return false;
3356
3357 /* So, now we have sized the commands and the filelen set to that.
3358 Now we can build the segment command and set the section file offsets. */
3359 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT)
3360 {
3361 for (i = 0; i < nbr_segcmd; i++)
3362 if (!bfd_mach_o_build_obj_seg_command
3363 (abfd, &commands[i].command.segment))
3364 return false;
3365 }
3366 else
3367 {
3368 bfd_vma maxvma = 0;
3369
3370 /* Skip pagezero and linkedit segments. */
3371 for (i = 1; i < nbr_segcmd - 1; i++)
3372 {
3373 bfd_mach_o_segment_command *seg = &commands[i].command.segment;
3374
3375 if (!bfd_mach_o_build_exec_seg_command (abfd, seg))
3376 return false;
3377
3378 if (seg->vmaddr + seg->vmsize > maxvma)
3379 maxvma = seg->vmaddr + seg->vmsize;
3380 }
3381
3382 /* Set the size of __PAGEZERO. */
3383 commands[0].command.segment.vmsize =
3384 commands[1].command.segment.vmaddr;
3385
3386 /* Set the vma and fileoff of __LINKEDIT. */
3387 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma;
3388 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen;
3389
3390 /* Set entry point (once segments have been laid out). */
3391 if (main_idx >= 0)
3392 commands[main_idx].command.main.entryoff =
3393 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr;
3394 }
3395
3396 return true;
3397 }
3398
3399 /* Set the contents of a section. */
3400
3401 bool
3402 bfd_mach_o_set_section_contents (bfd *abfd,
3403 asection *section,
3404 const void * location,
3405 file_ptr offset,
3406 bfd_size_type count)
3407 {
3408 file_ptr pos;
3409
3410 /* Trying to write the first section contents will trigger the creation of
3411 the load commands if they are not already present. */
3412 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd))
3413 return false;
3414
3415 if (count == 0)
3416 return true;
3417
3418 pos = section->filepos + offset;
3419 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3420 || bfd_bwrite (location, count, abfd) != count)
3421 return false;
3422
3423 return true;
3424 }
3425
3426 int
3427 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
3428 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3429 {
3430 return 0;
3431 }
3432
3433 /* Make an empty symbol. This is required only because
3434 bfd_make_section_anyway wants to create a symbol for the section. */
3435
3436 asymbol *
3437 bfd_mach_o_make_empty_symbol (bfd *abfd)
3438 {
3439 asymbol *new_symbol;
3440
3441 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
3442 if (new_symbol == NULL)
3443 return new_symbol;
3444 new_symbol->the_bfd = abfd;
3445 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
3446 return new_symbol;
3447 }
3448
3449 static bool
3450 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header)
3451 {
3452 struct mach_o_header_external raw;
3453 unsigned int size;
3454 bfd_vma (*get32) (const void *) = NULL;
3455
3456 /* Just read the magic number. */
3457 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3458 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
3459 return false;
3460
3461 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3462 {
3463 header->byteorder = BFD_ENDIAN_BIG;
3464 header->magic = BFD_MACH_O_MH_MAGIC;
3465 header->version = 1;
3466 get32 = bfd_getb32;
3467 }
3468 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
3469 {
3470 header->byteorder = BFD_ENDIAN_LITTLE;
3471 header->magic = BFD_MACH_O_MH_MAGIC;
3472 header->version = 1;
3473 get32 = bfd_getl32;
3474 }
3475 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3476 {
3477 header->byteorder = BFD_ENDIAN_BIG;
3478 header->magic = BFD_MACH_O_MH_MAGIC_64;
3479 header->version = 2;
3480 get32 = bfd_getb32;
3481 }
3482 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
3483 {
3484 header->byteorder = BFD_ENDIAN_LITTLE;
3485 header->magic = BFD_MACH_O_MH_MAGIC_64;
3486 header->version = 2;
3487 get32 = bfd_getl32;
3488 }
3489 else
3490 {
3491 header->byteorder = BFD_ENDIAN_UNKNOWN;
3492 return false;
3493 }
3494
3495 /* Once the size of the header is known, read the full header. */
3496 size = mach_o_wide_p (header) ?
3497 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
3498
3499 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0
3500 || bfd_bread (&raw, size, abfd) != size)
3501 return false;
3502
3503 header->cputype = (*get32) (raw.cputype);
3504 header->cpusubtype = (*get32) (raw.cpusubtype);
3505 header->filetype = (*get32) (raw.filetype);
3506 header->ncmds = (*get32) (raw.ncmds);
3507 header->sizeofcmds = (*get32) (raw.sizeofcmds);
3508 header->flags = (*get32) (raw.flags);
3509
3510 if (mach_o_wide_p (header))
3511 header->reserved = (*get32) (raw.reserved);
3512 else
3513 header->reserved = 0;
3514
3515 return true;
3516 }
3517
3518 bool
3519 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
3520 {
3521 bfd_mach_o_section *s;
3522 unsigned bfdalign = bfd_section_alignment (sec);
3523
3524 s = bfd_mach_o_get_mach_o_section (sec);
3525 if (s == NULL)
3526 {
3527 flagword bfd_flags;
3528 static const mach_o_section_name_xlat * xlat;
3529
3530 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
3531 if (s == NULL)
3532 return false;
3533 sec->used_by_bfd = s;
3534 s->bfdsection = sec;
3535
3536 /* Create the Darwin seg/sect name pair from the bfd name.
3537 If this is a canonical name for which a specific paiting exists
3538 there will also be defined flags, type, attribute and alignment
3539 values. */
3540 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
3541 if (xlat != NULL)
3542 {
3543 s->flags = xlat->macho_sectype | xlat->macho_secattr;
3544 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
3545 : bfdalign;
3546 bfd_set_section_alignment (sec, s->align);
3547 bfd_flags = bfd_section_flags (sec);
3548 if (bfd_flags == SEC_NO_FLAGS)
3549 bfd_set_section_flags (sec, xlat->bfd_flags);
3550 }
3551 else
3552 /* Create default flags. */
3553 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
3554 }
3555
3556 return _bfd_generic_new_section_hook (abfd, sec);
3557 }
3558
3559 static void
3560 bfd_mach_o_init_section_from_mach_o (asection *sec, unsigned long prot)
3561 {
3562 flagword flags;
3563 bfd_mach_o_section *section;
3564
3565 flags = bfd_section_flags (sec);
3566 section = bfd_mach_o_get_mach_o_section (sec);
3567
3568 /* TODO: see if we should use the xlat system for doing this by
3569 preference and fall back to this for unknown sections. */
3570
3571 if (flags == SEC_NO_FLAGS)
3572 {
3573 /* Try to guess flags. */
3574 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
3575 flags = SEC_DEBUGGING;
3576 else
3577 {
3578 flags = SEC_ALLOC;
3579 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
3580 != BFD_MACH_O_S_ZEROFILL)
3581 {
3582 flags |= SEC_LOAD;
3583 if (prot & BFD_MACH_O_PROT_EXECUTE)
3584 flags |= SEC_CODE;
3585 if (prot & BFD_MACH_O_PROT_WRITE)
3586 flags |= SEC_DATA;
3587 else if (prot & BFD_MACH_O_PROT_READ)
3588 flags |= SEC_READONLY;
3589 }
3590 }
3591 }
3592 else
3593 {
3594 if ((flags & SEC_DEBUGGING) == 0)
3595 flags |= SEC_ALLOC;
3596 }
3597
3598 if (section->offset != 0)
3599 flags |= SEC_HAS_CONTENTS;
3600 if (section->nreloc != 0)
3601 flags |= SEC_RELOC;
3602
3603 bfd_set_section_flags (sec, flags);
3604
3605 sec->vma = section->addr;
3606 sec->lma = section->addr;
3607 sec->size = section->size;
3608 sec->filepos = section->offset;
3609 sec->alignment_power = section->align;
3610 sec->segment_mark = 0;
3611 sec->reloc_count = section->nreloc;
3612 sec->rel_filepos = section->reloff;
3613 }
3614
3615 static asection *
3616 bfd_mach_o_make_bfd_section (bfd *abfd,
3617 const unsigned char *segname,
3618 const unsigned char *sectname)
3619 {
3620 const char *sname;
3621 flagword flags;
3622
3623 bfd_mach_o_convert_section_name_to_bfd
3624 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
3625 if (sname == NULL)
3626 return NULL;
3627
3628 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
3629 }
3630
3631 static asection *
3632 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot)
3633 {
3634 struct mach_o_section_32_external raw;
3635 asection *sec;
3636 bfd_mach_o_section *section;
3637
3638 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
3639 != BFD_MACH_O_SECTION_SIZE)
3640 return NULL;
3641
3642 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3643 if (sec == NULL)
3644 return NULL;
3645
3646 section = bfd_mach_o_get_mach_o_section (sec);
3647 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3648 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3649 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3650 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3651 section->addr = bfd_h_get_32 (abfd, raw.addr);
3652 section->size = bfd_h_get_32 (abfd, raw.size);
3653 section->offset = bfd_h_get_32 (abfd, raw.offset);
3654 section->align = bfd_h_get_32 (abfd, raw.align);
3655 /* PR 17512: file: 0017eb76. */
3656 if (section->align > 64)
3657 {
3658 _bfd_error_handler
3659 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, "
3660 "using 32 instead"), section->align);
3661 section->align = 32;
3662 }
3663 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3664 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3665 section->flags = bfd_h_get_32 (abfd, raw.flags);
3666 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3667 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3668 section->reserved3 = 0;
3669
3670 bfd_mach_o_init_section_from_mach_o (sec, prot);
3671
3672 return sec;
3673 }
3674
3675 static asection *
3676 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot)
3677 {
3678 struct mach_o_section_64_external raw;
3679 asection *sec;
3680 bfd_mach_o_section *section;
3681
3682 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
3683 != BFD_MACH_O_SECTION_64_SIZE)
3684 return NULL;
3685
3686 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
3687 if (sec == NULL)
3688 return NULL;
3689
3690 section = bfd_mach_o_get_mach_o_section (sec);
3691 memcpy (section->segname, raw.segname, sizeof (raw.segname));
3692 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
3693 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
3694 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
3695 section->addr = bfd_h_get_64 (abfd, raw.addr);
3696 section->size = bfd_h_get_64 (abfd, raw.size);
3697 section->offset = bfd_h_get_32 (abfd, raw.offset);
3698 section->align = bfd_h_get_32 (abfd, raw.align);
3699 if (section->align > 64)
3700 {
3701 _bfd_error_handler
3702 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, "
3703 "using 32 instead"), section->align);
3704 section->align = 32;
3705 }
3706 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
3707 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
3708 section->flags = bfd_h_get_32 (abfd, raw.flags);
3709 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
3710 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
3711 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
3712
3713 bfd_mach_o_init_section_from_mach_o (sec, prot);
3714
3715 return sec;
3716 }
3717
3718 static asection *
3719 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide)
3720 {
3721 if (wide)
3722 return bfd_mach_o_read_section_64 (abfd, prot);
3723 else
3724 return bfd_mach_o_read_section_32 (abfd, prot);
3725 }
3726
3727 static bool
3728 bfd_mach_o_read_symtab_symbol (bfd *abfd,
3729 bfd_mach_o_symtab_command *sym,
3730 bfd_mach_o_asymbol *s,
3731 unsigned long i)
3732 {
3733 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3734 unsigned int wide = mach_o_wide_p (&mdata->header);
3735 unsigned int symwidth =
3736 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3737 unsigned int symoff = sym->symoff + (i * symwidth);
3738 struct mach_o_nlist_64_external raw;
3739 unsigned char type = -1;
3740 unsigned char section = -1;
3741 short desc = -1;
3742 symvalue value = -1;
3743 unsigned long stroff = -1;
3744 unsigned int symtype = -1;
3745
3746 BFD_ASSERT (sym->strtab != NULL);
3747
3748 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
3749 || bfd_bread (&raw, symwidth, abfd) != symwidth)
3750 {
3751 _bfd_error_handler
3752 /* xgettext:c-format */
3753 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"),
3754 symwidth, symoff);
3755 return false;
3756 }
3757
3758 stroff = bfd_h_get_32 (abfd, raw.n_strx);
3759 type = bfd_h_get_8 (abfd, raw.n_type);
3760 symtype = type & BFD_MACH_O_N_TYPE;
3761 section = bfd_h_get_8 (abfd, raw.n_sect);
3762 desc = bfd_h_get_16 (abfd, raw.n_desc);
3763 if (wide)
3764 value = bfd_h_get_64 (abfd, raw.n_value);
3765 else
3766 value = bfd_h_get_32 (abfd, raw.n_value);
3767
3768 if (stroff >= sym->strsize)
3769 {
3770 _bfd_error_handler
3771 /* xgettext:c-format */
3772 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"),
3773 stroff,
3774 sym->strsize);
3775 return false;
3776 }
3777
3778 s->symbol.the_bfd = abfd;
3779 s->symbol.name = sym->strtab + stroff;
3780 s->symbol.value = value;
3781 s->symbol.flags = 0x0;
3782 s->symbol.udata.i = i;
3783 s->n_type = type;
3784 s->n_sect = section;
3785 s->n_desc = desc;
3786
3787 if (type & BFD_MACH_O_N_STAB)
3788 {
3789 s->symbol.flags |= BSF_DEBUGGING;
3790 s->symbol.section = bfd_und_section_ptr;
3791 switch (type)
3792 {
3793 case N_FUN:
3794 case N_STSYM:
3795 case N_LCSYM:
3796 case N_BNSYM:
3797 case N_SLINE:
3798 case N_ENSYM:
3799 case N_ECOMM:
3800 case N_ECOML:
3801 case N_GSYM:
3802 if ((section > 0) && (section <= mdata->nsects))
3803 {
3804 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3805 s->symbol.value =
3806 s->symbol.value - mdata->sections[section - 1]->addr;
3807 }
3808 break;
3809 }
3810 }
3811 else
3812 {
3813 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
3814 s->symbol.flags |= BSF_GLOBAL;
3815 else
3816 s->symbol.flags |= BSF_LOCAL;
3817
3818 switch (symtype)
3819 {
3820 case BFD_MACH_O_N_UNDF:
3821 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
3822 && s->symbol.value != 0)
3823 {
3824 /* A common symbol. */
3825 s->symbol.section = bfd_com_section_ptr;
3826 s->symbol.flags = BSF_NO_FLAGS;
3827 }
3828 else
3829 {
3830 s->symbol.section = bfd_und_section_ptr;
3831 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
3832 s->symbol.flags |= BSF_WEAK;
3833 }
3834 break;
3835 case BFD_MACH_O_N_PBUD:
3836 s->symbol.section = bfd_und_section_ptr;
3837 break;
3838 case BFD_MACH_O_N_ABS:
3839 s->symbol.section = bfd_abs_section_ptr;
3840 break;
3841 case BFD_MACH_O_N_SECT:
3842 if ((section > 0) && (section <= mdata->nsects))
3843 {
3844 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3845 s->symbol.value =
3846 s->symbol.value - mdata->sections[section - 1]->addr;
3847 }
3848 else
3849 {
3850 /* Mach-O uses 0 to mean "no section"; not an error. */
3851 if (section != 0)
3852 {
3853 _bfd_error_handler
3854 /* xgettext:c-format */
3855 (_("bfd_mach_o_read_symtab_symbol: "
3856 "symbol \"%s\" specified invalid section %d (max %lu): "
3857 "setting to undefined"),
3858 s->symbol.name, section, mdata->nsects);
3859 }
3860 s->symbol.section = bfd_und_section_ptr;
3861 }
3862 break;
3863 case BFD_MACH_O_N_INDR:
3864 /* FIXME: we don't follow the BFD convention as this indirect symbol
3865 won't be followed by the referenced one. This looks harmless
3866 unless we start using the linker. */
3867 s->symbol.flags |= BSF_INDIRECT;
3868 s->symbol.section = bfd_ind_section_ptr;
3869 s->symbol.value = 0;
3870 break;
3871 default:
3872 _bfd_error_handler
3873 /* xgettext:c-format */
3874 (_("bfd_mach_o_read_symtab_symbol: "
3875 "symbol \"%s\" specified invalid type field 0x%x: "
3876 "setting to undefined"), s->symbol.name, symtype);
3877 s->symbol.section = bfd_und_section_ptr;
3878 break;
3879 }
3880 }
3881
3882 return true;
3883 }
3884
3885 bool
3886 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3887 {
3888 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3889 bfd_mach_o_symtab_command *sym = mdata->symtab;
3890
3891 /* Fail if there is no symtab. */
3892 if (sym == NULL)
3893 return false;
3894
3895 /* Success if already loaded. */
3896 if (sym->strtab)
3897 return true;
3898
3899 if (abfd->flags & BFD_IN_MEMORY)
3900 {
3901 struct bfd_in_memory *b;
3902
3903 b = (struct bfd_in_memory *) abfd->iostream;
3904
3905 if ((sym->stroff + sym->strsize) > b->size)
3906 {
3907 bfd_set_error (bfd_error_file_truncated);
3908 return false;
3909 }
3910 sym->strtab = (char *) b->buffer + sym->stroff;
3911 }
3912 else
3913 {
3914 /* See PR 21840 for a reproducer. */
3915 if ((sym->strsize + 1) == 0)
3916 return false;
3917 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0)
3918 return false;
3919 sym->strtab = (char *) _bfd_alloc_and_read (abfd, sym->strsize + 1,
3920 sym->strsize);
3921 if (sym->strtab == NULL)
3922 return false;
3923
3924 /* Zero terminate the string table. */
3925 sym->strtab[sym->strsize] = 0;
3926 }
3927
3928 return true;
3929 }
3930
3931 bool
3932 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3933 {
3934 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3935 bfd_mach_o_symtab_command *sym = mdata->symtab;
3936 unsigned long i;
3937 size_t amt;
3938 ufile_ptr filesize;
3939
3940 if (sym == NULL || sym->nsyms == 0 || sym->symbols)
3941 /* Return now if there are no symbols or if already loaded. */
3942 return true;
3943
3944 filesize = bfd_get_file_size (abfd);
3945 if (filesize != 0)
3946 {
3947 unsigned int wide = mach_o_wide_p (&mdata->header);
3948 unsigned int symwidth
3949 = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
3950
3951 if (sym->symoff > filesize
3952 || sym->nsyms > (filesize - sym->symoff) / symwidth)
3953 {
3954 bfd_set_error (bfd_error_file_truncated);
3955 sym->nsyms = 0;
3956 return false;
3957 }
3958 }
3959 if (_bfd_mul_overflow (sym->nsyms, sizeof (bfd_mach_o_asymbol), &amt)
3960 || (sym->symbols = bfd_alloc (abfd, amt)) == NULL)
3961 {
3962 bfd_set_error (bfd_error_no_memory);
3963 sym->nsyms = 0;
3964 return false;
3965 }
3966
3967 if (!bfd_mach_o_read_symtab_strtab (abfd))
3968 goto fail;
3969
3970 for (i = 0; i < sym->nsyms; i++)
3971 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3972 goto fail;
3973
3974 return true;
3975
3976 fail:
3977 bfd_release (abfd, sym->symbols);
3978 sym->symbols = NULL;
3979 sym->nsyms = 0;
3980 return false;
3981 }
3982
3983 static const char *
3984 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3985 {
3986 switch ((int) flavour)
3987 {
3988 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3989 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3990 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3991 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3992 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3993 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3994 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3995 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3996 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3997 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3998 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3999 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
4000 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
4001 default: return "UNKNOWN";
4002 }
4003 }
4004
4005 static const char *
4006 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
4007 {
4008 switch ((int) flavour)
4009 {
4010 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
4011 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
4012 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
4013 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
4014 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
4015 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
4016 default: return "UNKNOWN";
4017 }
4018 }
4019
4020 static unsigned char *
4021 bfd_mach_o_alloc_and_read (bfd *abfd, file_ptr filepos, size_t size)
4022 {
4023 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
4024 return NULL;
4025 return _bfd_alloc_and_read (abfd, size, size);
4026 }
4027
4028 static bool
4029 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
4030 {
4031 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
4032 struct mach_o_str_command_external raw;
4033 unsigned int nameoff;
4034 unsigned int namelen;
4035
4036 if (command->len < sizeof (raw) + 8)
4037 return false;
4038 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4039 return false;
4040
4041 nameoff = bfd_h_get_32 (abfd, raw.str);
4042 if (nameoff > command->len)
4043 return false;
4044
4045 cmd->name_offset = nameoff;
4046 namelen = command->len - nameoff;
4047 nameoff += command->offset;
4048 cmd->name_str = (char *) bfd_mach_o_alloc_and_read (abfd, nameoff, namelen);
4049 return cmd->name_str != NULL;
4050 }
4051
4052 static bool
4053 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
4054 {
4055 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4056 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
4057 struct mach_o_dylib_command_external raw;
4058 unsigned int nameoff;
4059 unsigned int namelen;
4060 file_ptr pos;
4061
4062 if (command->len < sizeof (raw) + 8)
4063 return false;
4064 switch (command->type)
4065 {
4066 case BFD_MACH_O_LC_LOAD_DYLIB:
4067 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4068 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4069 case BFD_MACH_O_LC_ID_DYLIB:
4070 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4071 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4072 break;
4073 default:
4074 BFD_FAIL ();
4075 return false;
4076 }
4077
4078 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4079 return false;
4080
4081 nameoff = bfd_h_get_32 (abfd, raw.name);
4082 if (nameoff > command->len)
4083 return false;
4084 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
4085 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
4086 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
4087
4088 cmd->name_offset = command->offset + nameoff;
4089 namelen = command->len - nameoff;
4090 pos = mdata->hdr_offset + cmd->name_offset;
4091 cmd->name_str = (char *) bfd_mach_o_alloc_and_read (abfd, pos, namelen);
4092 return cmd->name_str != NULL;
4093 }
4094
4095 static bool
4096 bfd_mach_o_read_prebound_dylib (bfd *abfd,
4097 bfd_mach_o_load_command *command)
4098 {
4099 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
4100 struct mach_o_prebound_dylib_command_external raw;
4101 unsigned int nameoff;
4102 unsigned int modoff;
4103 unsigned int str_len;
4104 unsigned char *str;
4105
4106 if (command->len < sizeof (raw) + 8)
4107 return false;
4108 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4109 return false;
4110
4111 nameoff = bfd_h_get_32 (abfd, raw.name);
4112 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
4113 if (nameoff > command->len || modoff > command->len)
4114 return false;
4115
4116 str_len = command->len - sizeof (raw);
4117 str = _bfd_alloc_and_read (abfd, str_len, str_len);
4118 if (str == NULL)
4119 return false;
4120
4121 cmd->name_offset = command->offset + nameoff;
4122 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
4123 cmd->linked_modules_offset = command->offset + modoff;
4124
4125 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4126 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
4127 return true;
4128 }
4129
4130 static bool
4131 bfd_mach_o_read_prebind_cksum (bfd *abfd,
4132 bfd_mach_o_load_command *command)
4133 {
4134 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
4135 struct mach_o_prebind_cksum_command_external raw;
4136
4137 if (command->len < sizeof (raw) + 8)
4138 return false;
4139 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4140 return false;
4141
4142 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
4143 return true;
4144 }
4145
4146 static bool
4147 bfd_mach_o_read_twolevel_hints (bfd *abfd,
4148 bfd_mach_o_load_command *command)
4149 {
4150 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
4151 struct mach_o_twolevel_hints_command_external raw;
4152
4153 if (command->len < sizeof (raw) + 8)
4154 return false;
4155 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4156 return false;
4157
4158 cmd->offset = bfd_get_32 (abfd, raw.offset);
4159 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
4160 return true;
4161 }
4162
4163 static bool
4164 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
4165 {
4166 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
4167 struct mach_o_fvmlib_command_external raw;
4168 unsigned int nameoff;
4169 unsigned int namelen;
4170
4171 if (command->len < sizeof (raw) + 8)
4172 return false;
4173 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4174 return false;
4175
4176 nameoff = bfd_h_get_32 (abfd, raw.name);
4177 if (nameoff > command->len)
4178 return false;
4179 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
4180 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
4181
4182 fvm->name_offset = command->offset + nameoff;
4183 namelen = command->len - nameoff;
4184 fvm->name_str = (char *) bfd_mach_o_alloc_and_read (abfd, fvm->name_offset,
4185 namelen);
4186 return fvm->name_str != NULL;
4187 }
4188
4189 static bool
4190 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
4191 {
4192 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4193 bfd_mach_o_thread_command *cmd = &command->command.thread;
4194 unsigned int offset;
4195 unsigned int nflavours;
4196 unsigned int i;
4197 struct mach_o_thread_command_external raw;
4198 size_t amt;
4199
4200 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
4201 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
4202
4203 /* Count the number of threads. */
4204 offset = 8;
4205 nflavours = 0;
4206 while (offset + sizeof (raw) <= command->len)
4207 {
4208 unsigned int count;
4209
4210 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4211 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4212 return false;
4213
4214 count = bfd_h_get_32 (abfd, raw.count);
4215 if (count > (unsigned) -1 / 4
4216 || command->len - (offset + sizeof (raw)) < count * 4)
4217 return false;
4218 offset += sizeof (raw) + count * 4;
4219 nflavours++;
4220 }
4221 if (nflavours == 0 || offset != command->len)
4222 return false;
4223
4224 /* Allocate threads. */
4225 if (_bfd_mul_overflow (nflavours, sizeof (bfd_mach_o_thread_flavour), &amt))
4226 {
4227 bfd_set_error (bfd_error_file_too_big);
4228 return false;
4229 }
4230 cmd->flavours = bfd_alloc (abfd, amt);
4231 if (cmd->flavours == NULL)
4232 return false;
4233 cmd->nflavours = nflavours;
4234
4235 offset = 8;
4236 nflavours = 0;
4237 while (offset != command->len)
4238 {
4239 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
4240 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4241 return false;
4242
4243 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
4244 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
4245 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
4246 offset += cmd->flavours[nflavours].size + sizeof (raw);
4247 nflavours++;
4248 }
4249
4250 for (i = 0; i < nflavours; i++)
4251 {
4252 asection *bfdsec;
4253 unsigned int snamelen;
4254 char *sname;
4255 const char *flavourstr;
4256 const char *prefix = "LC_THREAD";
4257 unsigned int j = 0;
4258
4259 switch (mdata->header.cputype)
4260 {
4261 case BFD_MACH_O_CPU_TYPE_POWERPC:
4262 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
4263 flavourstr =
4264 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
4265 break;
4266 case BFD_MACH_O_CPU_TYPE_I386:
4267 case BFD_MACH_O_CPU_TYPE_X86_64:
4268 flavourstr =
4269 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
4270 break;
4271 default:
4272 flavourstr = "UNKNOWN_ARCHITECTURE";
4273 break;
4274 }
4275
4276 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
4277 sname = bfd_alloc (abfd, snamelen);
4278 if (sname == NULL)
4279 return false;
4280
4281 for (;;)
4282 {
4283 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
4284 if (bfd_get_section_by_name (abfd, sname) == NULL)
4285 break;
4286 j++;
4287 }
4288
4289 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
4290
4291 bfdsec->vma = 0;
4292 bfdsec->lma = 0;
4293 bfdsec->size = cmd->flavours[i].size;
4294 bfdsec->filepos = cmd->flavours[i].offset;
4295 bfdsec->alignment_power = 0x0;
4296
4297 cmd->section = bfdsec;
4298 }
4299
4300 return true;
4301 }
4302
4303 static bool
4304 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command,
4305 ufile_ptr filesize)
4306 {
4307 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
4308 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4309
4310 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
4311
4312 {
4313 struct mach_o_dysymtab_command_external raw;
4314
4315 if (command->len < sizeof (raw) + 8)
4316 return false;
4317 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4318 return false;
4319
4320 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
4321 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
4322 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
4323 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
4324 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
4325 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
4326 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
4327 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
4328 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
4329 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
4330 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
4331 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
4332 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
4333 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
4334 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
4335 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
4336 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
4337 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
4338 }
4339
4340 if (cmd->nmodtab != 0)
4341 {
4342 unsigned int i;
4343 int wide = bfd_mach_o_wide_p (abfd);
4344 unsigned int module_len = wide ? 56 : 52;
4345 size_t amt;
4346
4347 if (cmd->modtaboff > filesize
4348 || cmd->nmodtab > (filesize - cmd->modtaboff) / module_len)
4349 {
4350 bfd_set_error (bfd_error_file_truncated);
4351 return false;
4352 }
4353 if (_bfd_mul_overflow (cmd->nmodtab,
4354 sizeof (bfd_mach_o_dylib_module), &amt))
4355 {
4356 bfd_set_error (bfd_error_file_too_big);
4357 return false;
4358 }
4359 cmd->dylib_module = bfd_alloc (abfd, amt);
4360 if (cmd->dylib_module == NULL)
4361 return false;
4362
4363 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
4364 return false;
4365
4366 for (i = 0; i < cmd->nmodtab; i++)
4367 {
4368 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
4369 unsigned long v;
4370 unsigned char buf[56];
4371
4372 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
4373 return false;
4374
4375 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
4376 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
4377 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
4378 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
4379 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
4380 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
4381 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
4382 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
4383 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
4384 v = bfd_h_get_32 (abfd, buf +36);
4385 module->iinit = v & 0xffff;
4386 module->iterm = (v >> 16) & 0xffff;
4387 v = bfd_h_get_32 (abfd, buf + 40);
4388 module->ninit = v & 0xffff;
4389 module->nterm = (v >> 16) & 0xffff;
4390 if (wide)
4391 {
4392 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
4393 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
4394 }
4395 else
4396 {
4397 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
4398 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
4399 }
4400 }
4401 }
4402
4403 if (cmd->ntoc != 0)
4404 {
4405 unsigned long i;
4406 size_t amt;
4407 struct mach_o_dylib_table_of_contents_external raw;
4408
4409 if (cmd->tocoff > filesize
4410 || cmd->ntoc > (filesize - cmd->tocoff) / sizeof (raw))
4411 {
4412 bfd_set_error (bfd_error_file_truncated);
4413 return false;
4414 }
4415 if (_bfd_mul_overflow (cmd->ntoc,
4416 sizeof (bfd_mach_o_dylib_table_of_content), &amt))
4417 {
4418 bfd_set_error (bfd_error_file_too_big);
4419 return false;
4420 }
4421 cmd->dylib_toc = bfd_alloc (abfd, amt);
4422 if (cmd->dylib_toc == NULL)
4423 return false;
4424
4425 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
4426 return false;
4427
4428 for (i = 0; i < cmd->ntoc; i++)
4429 {
4430 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
4431
4432 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4433 return false;
4434
4435 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
4436 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
4437 }
4438 }
4439
4440 if (cmd->nindirectsyms != 0)
4441 {
4442 unsigned int i;
4443 size_t amt;
4444
4445 if (cmd->indirectsymoff > filesize
4446 || cmd->nindirectsyms > (filesize - cmd->indirectsymoff) / 4)
4447 {
4448 bfd_set_error (bfd_error_file_truncated);
4449 return false;
4450 }
4451 if (_bfd_mul_overflow (cmd->nindirectsyms, sizeof (unsigned int), &amt))
4452 {
4453 bfd_set_error (bfd_error_file_too_big);
4454 return false;
4455 }
4456 cmd->indirect_syms = bfd_alloc (abfd, amt);
4457 if (cmd->indirect_syms == NULL)
4458 return false;
4459
4460 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
4461 return false;
4462
4463 for (i = 0; i < cmd->nindirectsyms; i++)
4464 {
4465 unsigned char raw[4];
4466 unsigned int *is = &cmd->indirect_syms[i];
4467
4468 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4469 return false;
4470
4471 *is = bfd_h_get_32 (abfd, raw);
4472 }
4473 }
4474
4475 if (cmd->nextrefsyms != 0)
4476 {
4477 unsigned long v;
4478 unsigned int i;
4479 size_t amt;
4480
4481 if (cmd->extrefsymoff > filesize
4482 || cmd->nextrefsyms > (filesize - cmd->extrefsymoff) / 4)
4483 {
4484 bfd_set_error (bfd_error_file_truncated);
4485 return false;
4486 }
4487 if (_bfd_mul_overflow (cmd->nextrefsyms,
4488 sizeof (bfd_mach_o_dylib_reference), &amt))
4489 {
4490 bfd_set_error (bfd_error_file_too_big);
4491 return false;
4492 }
4493 cmd->ext_refs = bfd_alloc (abfd, amt);
4494 if (cmd->ext_refs == NULL)
4495 return false;
4496
4497 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
4498 return false;
4499
4500 for (i = 0; i < cmd->nextrefsyms; i++)
4501 {
4502 unsigned char raw[4];
4503 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
4504
4505 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
4506 return false;
4507
4508 /* Fields isym and flags are written as bit-fields, thus we need
4509 a specific processing for endianness. */
4510 v = bfd_h_get_32 (abfd, raw);
4511 if (bfd_big_endian (abfd))
4512 {
4513 ref->isym = (v >> 8) & 0xffffff;
4514 ref->flags = v & 0xff;
4515 }
4516 else
4517 {
4518 ref->isym = v & 0xffffff;
4519 ref->flags = (v >> 24) & 0xff;
4520 }
4521 }
4522 }
4523
4524 if (mdata->dysymtab)
4525 return false;
4526 mdata->dysymtab = cmd;
4527
4528 return true;
4529 }
4530
4531 static bool
4532 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command,
4533 ufile_ptr filesize)
4534 {
4535 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
4536 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4537 struct mach_o_symtab_command_external raw;
4538
4539 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
4540
4541 if (command->len < sizeof (raw) + 8)
4542 return false;
4543 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4544 return false;
4545
4546 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
4547 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
4548 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
4549 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
4550 symtab->symbols = NULL;
4551 symtab->strtab = NULL;
4552
4553 if (symtab->symoff > filesize
4554 || symtab->nsyms > (filesize - symtab->symoff) / BFD_MACH_O_NLIST_SIZE
4555 || symtab->stroff > filesize
4556 || symtab->strsize > filesize - symtab->stroff)
4557 {
4558 bfd_set_error (bfd_error_file_truncated);
4559 return false;
4560 }
4561
4562 if (symtab->nsyms != 0)
4563 abfd->flags |= HAS_SYMS;
4564
4565 if (mdata->symtab)
4566 return false;
4567 mdata->symtab = symtab;
4568 return true;
4569 }
4570
4571 static bool
4572 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
4573 {
4574 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
4575
4576 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
4577
4578 if (command->len < 16 + 8)
4579 return false;
4580 if (bfd_bread (cmd->uuid, 16, abfd) != 16)
4581 return false;
4582
4583 return true;
4584 }
4585
4586 static bool
4587 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
4588 {
4589 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
4590 struct mach_o_linkedit_data_command_external raw;
4591
4592 if (command->len < sizeof (raw) + 8)
4593 return false;
4594 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4595 return false;
4596
4597 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
4598 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
4599 return true;
4600 }
4601
4602 static bool
4603 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
4604 {
4605 bfd_mach_o_str_command *cmd = &command->command.str;
4606 struct mach_o_str_command_external raw;
4607 unsigned long off;
4608
4609 if (command->len < sizeof (raw) + 8)
4610 return false;
4611 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4612 return false;
4613
4614 off = bfd_get_32 (abfd, raw.str);
4615 if (off > command->len)
4616 return false;
4617
4618 cmd->stroff = command->offset + off;
4619 cmd->str_len = command->len - off;
4620 cmd->str = (char *) bfd_mach_o_alloc_and_read (abfd, cmd->stroff,
4621 cmd->str_len);
4622 return cmd->str != NULL;
4623 }
4624
4625 static bool
4626 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd)
4627 {
4628 /* Read rebase content. */
4629 if (cmd->rebase_content == NULL && cmd->rebase_size != 0)
4630 {
4631 cmd->rebase_content
4632 = bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size);
4633 if (cmd->rebase_content == NULL)
4634 return false;
4635 }
4636
4637 /* Read bind content. */
4638 if (cmd->bind_content == NULL && cmd->bind_size != 0)
4639 {
4640 cmd->bind_content
4641 = bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size);
4642 if (cmd->bind_content == NULL)
4643 return false;
4644 }
4645
4646 /* Read weak bind content. */
4647 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0)
4648 {
4649 cmd->weak_bind_content = bfd_mach_o_alloc_and_read
4650 (abfd, cmd->weak_bind_off, cmd->weak_bind_size);
4651 if (cmd->weak_bind_content == NULL)
4652 return false;
4653 }
4654
4655 /* Read lazy bind content. */
4656 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0)
4657 {
4658 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read
4659 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size);
4660 if (cmd->lazy_bind_content == NULL)
4661 return false;
4662 }
4663
4664 /* Read export content. */
4665 if (cmd->export_content == NULL && cmd->export_size != 0)
4666 {
4667 cmd->export_content = bfd_mach_o_alloc_and_read
4668 (abfd, cmd->export_off, cmd->export_size);
4669 if (cmd->export_content == NULL)
4670 return false;
4671 }
4672
4673 return true;
4674 }
4675
4676 static bool
4677 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
4678 {
4679 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
4680 struct mach_o_dyld_info_command_external raw;
4681
4682 if (command->len < sizeof (raw) + 8)
4683 return false;
4684 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4685 return false;
4686
4687 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
4688 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
4689 cmd->rebase_content = NULL;
4690 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
4691 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
4692 cmd->bind_content = NULL;
4693 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
4694 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
4695 cmd->weak_bind_content = NULL;
4696 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
4697 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
4698 cmd->lazy_bind_content = NULL;
4699 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
4700 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
4701 cmd->export_content = NULL;
4702 return true;
4703 }
4704
4705 static bool
4706 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
4707 {
4708 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
4709 struct mach_o_version_min_command_external raw;
4710
4711 if (command->len < sizeof (raw) + 8)
4712 return false;
4713 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4714 return false;
4715
4716 cmd->version = bfd_get_32 (abfd, raw.version);
4717 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4718 return true;
4719 }
4720
4721 static bool
4722 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
4723 {
4724 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4725 struct mach_o_encryption_info_command_external raw;
4726
4727 if (command->len < sizeof (raw) + 8)
4728 return false;
4729 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4730 return false;
4731
4732 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4733 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4734 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4735 return true;
4736 }
4737
4738 static bool
4739 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command)
4740 {
4741 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
4742 struct mach_o_encryption_info_64_command_external raw;
4743
4744 if (command->len < sizeof (raw) + 8)
4745 return false;
4746 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4747 return false;
4748
4749 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
4750 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
4751 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
4752 return true;
4753 }
4754
4755 static bool
4756 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
4757 {
4758 bfd_mach_o_main_command *cmd = &command->command.main;
4759 struct mach_o_entry_point_command_external raw;
4760
4761 if (command->len < sizeof (raw) + 8)
4762 return false;
4763 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4764 return false;
4765
4766 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
4767 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
4768 return true;
4769 }
4770
4771 static bool
4772 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
4773 {
4774 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
4775 struct mach_o_source_version_command_external raw;
4776 bfd_uint64_t ver;
4777
4778 if (command->len < sizeof (raw) + 8)
4779 return false;
4780 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4781 return false;
4782
4783 ver = bfd_get_64 (abfd, raw.version);
4784 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
4785 generates warnings) in case of the host doesn't support 64 bit
4786 integers. */
4787 cmd->e = ver & 0x3ff;
4788 ver >>= 10;
4789 cmd->d = ver & 0x3ff;
4790 ver >>= 10;
4791 cmd->c = ver & 0x3ff;
4792 ver >>= 10;
4793 cmd->b = ver & 0x3ff;
4794 ver >>= 10;
4795 cmd->a = ver & 0xffffff;
4796 return true;
4797 }
4798
4799 static bool
4800 bfd_mach_o_read_note (bfd *abfd, bfd_mach_o_load_command *command)
4801 {
4802 bfd_mach_o_note_command *cmd = &command->command.note;
4803 struct mach_o_note_command_external raw;
4804
4805 if (command->len < sizeof (raw) + 8)
4806 return false;
4807 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4808 return false;
4809
4810 memcpy (cmd->data_owner, raw.data_owner, 16);
4811 cmd->offset = bfd_get_64 (abfd, raw.offset);
4812 cmd->size = bfd_get_64 (abfd, raw.size);
4813 return true;
4814 }
4815
4816 static bool
4817 bfd_mach_o_read_build_version (bfd *abfd, bfd_mach_o_load_command *command)
4818 {
4819 bfd_mach_o_build_version_command *cmd = &command->command.build_version;
4820 struct mach_o_build_version_command_external raw;
4821
4822 if (command->len < sizeof (raw) + 8)
4823 return false;
4824 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4825 return false;
4826
4827 cmd->platform = bfd_get_32 (abfd, raw.platform);
4828 cmd->minos = bfd_get_32 (abfd, raw.minos);
4829 cmd->sdk = bfd_get_32 (abfd, raw.sdk);
4830 cmd->ntools = bfd_get_32 (abfd, raw.ntools);
4831 return true;
4832 }
4833
4834 static bool
4835 bfd_mach_o_read_segment (bfd *abfd,
4836 bfd_mach_o_load_command *command,
4837 unsigned int wide)
4838 {
4839 bfd_mach_o_segment_command *seg = &command->command.segment;
4840 unsigned long i;
4841
4842 if (wide)
4843 {
4844 struct mach_o_segment_command_64_external raw;
4845
4846 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
4847
4848 if (command->len < sizeof (raw) + 8)
4849 return false;
4850 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4851 return false;
4852
4853 memcpy (seg->segname, raw.segname, 16);
4854 seg->segname[16] = '\0';
4855
4856 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
4857 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
4858 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
4859 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
4860 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4861 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4862 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4863 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4864 }
4865 else
4866 {
4867 struct mach_o_segment_command_32_external raw;
4868
4869 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
4870
4871 if (command->len < sizeof (raw) + 8)
4872 return false;
4873 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
4874 return false;
4875
4876 memcpy (seg->segname, raw.segname, 16);
4877 seg->segname[16] = '\0';
4878
4879 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
4880 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
4881 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
4882 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
4883 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
4884 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
4885 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
4886 seg->flags = bfd_h_get_32 (abfd, raw.flags);
4887 }
4888 seg->sect_head = NULL;
4889 seg->sect_tail = NULL;
4890
4891 for (i = 0; i < seg->nsects; i++)
4892 {
4893 asection *sec;
4894
4895 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide);
4896 if (sec == NULL)
4897 return false;
4898
4899 bfd_mach_o_append_section_to_segment
4900 (seg, bfd_mach_o_get_mach_o_section (sec));
4901 }
4902
4903 return true;
4904 }
4905
4906 static bool
4907 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
4908 {
4909 return bfd_mach_o_read_segment (abfd, command, 0);
4910 }
4911
4912 static bool
4913 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
4914 {
4915 return bfd_mach_o_read_segment (abfd, command, 1);
4916 }
4917
4918 static bool
4919 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command,
4920 ufile_ptr filesize)
4921 {
4922 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4923 struct mach_o_load_command_external raw;
4924 unsigned int cmd;
4925
4926 /* Read command type and length. */
4927 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0
4928 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
4929 return false;
4930
4931 cmd = bfd_h_get_32 (abfd, raw.cmd);
4932 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
4933 command->type_required = (cmd & BFD_MACH_O_LC_REQ_DYLD) != 0;
4934 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
4935 if (command->len < 8 || command->len % 4 != 0)
4936 return false;
4937
4938 switch (command->type)
4939 {
4940 case BFD_MACH_O_LC_SEGMENT:
4941 if (!bfd_mach_o_read_segment_32 (abfd, command))
4942 return false;
4943 break;
4944 case BFD_MACH_O_LC_SEGMENT_64:
4945 if (!bfd_mach_o_read_segment_64 (abfd, command))
4946 return false;
4947 break;
4948 case BFD_MACH_O_LC_SYMTAB:
4949 if (!bfd_mach_o_read_symtab (abfd, command, filesize))
4950 return false;
4951 break;
4952 case BFD_MACH_O_LC_SYMSEG:
4953 break;
4954 case BFD_MACH_O_LC_THREAD:
4955 case BFD_MACH_O_LC_UNIXTHREAD:
4956 if (!bfd_mach_o_read_thread (abfd, command))
4957 return false;
4958 break;
4959 case BFD_MACH_O_LC_LOAD_DYLINKER:
4960 case BFD_MACH_O_LC_ID_DYLINKER:
4961 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
4962 if (!bfd_mach_o_read_dylinker (abfd, command))
4963 return false;
4964 break;
4965 case BFD_MACH_O_LC_LOAD_DYLIB:
4966 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
4967 case BFD_MACH_O_LC_ID_DYLIB:
4968 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
4969 case BFD_MACH_O_LC_REEXPORT_DYLIB:
4970 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
4971 if (!bfd_mach_o_read_dylib (abfd, command))
4972 return false;
4973 break;
4974 case BFD_MACH_O_LC_PREBOUND_DYLIB:
4975 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
4976 return false;
4977 break;
4978 case BFD_MACH_O_LC_LOADFVMLIB:
4979 case BFD_MACH_O_LC_IDFVMLIB:
4980 if (!bfd_mach_o_read_fvmlib (abfd, command))
4981 return false;
4982 break;
4983 case BFD_MACH_O_LC_IDENT:
4984 case BFD_MACH_O_LC_FVMFILE:
4985 case BFD_MACH_O_LC_PREPAGE:
4986 case BFD_MACH_O_LC_ROUTINES:
4987 case BFD_MACH_O_LC_ROUTINES_64:
4988 break;
4989 case BFD_MACH_O_LC_SUB_FRAMEWORK:
4990 case BFD_MACH_O_LC_SUB_UMBRELLA:
4991 case BFD_MACH_O_LC_SUB_LIBRARY:
4992 case BFD_MACH_O_LC_SUB_CLIENT:
4993 case BFD_MACH_O_LC_RPATH:
4994 if (!bfd_mach_o_read_str (abfd, command))
4995 return false;
4996 break;
4997 case BFD_MACH_O_LC_DYSYMTAB:
4998 if (!bfd_mach_o_read_dysymtab (abfd, command, filesize))
4999 return false;
5000 break;
5001 case BFD_MACH_O_LC_PREBIND_CKSUM:
5002 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
5003 return false;
5004 break;
5005 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
5006 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
5007 return false;
5008 break;
5009 case BFD_MACH_O_LC_UUID:
5010 if (!bfd_mach_o_read_uuid (abfd, command))
5011 return false;
5012 break;
5013 case BFD_MACH_O_LC_CODE_SIGNATURE:
5014 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
5015 case BFD_MACH_O_LC_FUNCTION_STARTS:
5016 case BFD_MACH_O_LC_DATA_IN_CODE:
5017 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
5018 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT:
5019 case BFD_MACH_O_LC_DYLD_EXPORTS_TRIE:
5020 case BFD_MACH_O_LC_DYLD_CHAINED_FIXUPS:
5021 if (!bfd_mach_o_read_linkedit (abfd, command))
5022 return false;
5023 break;
5024 case BFD_MACH_O_LC_ENCRYPTION_INFO:
5025 if (!bfd_mach_o_read_encryption_info (abfd, command))
5026 return false;
5027 break;
5028 case BFD_MACH_O_LC_ENCRYPTION_INFO_64:
5029 if (!bfd_mach_o_read_encryption_info_64 (abfd, command))
5030 return false;
5031 break;
5032 case BFD_MACH_O_LC_DYLD_INFO:
5033 if (!bfd_mach_o_read_dyld_info (abfd, command))
5034 return false;
5035 break;
5036 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
5037 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
5038 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS:
5039 case BFD_MACH_O_LC_VERSION_MIN_TVOS:
5040 if (!bfd_mach_o_read_version_min (abfd, command))
5041 return false;
5042 break;
5043 case BFD_MACH_O_LC_MAIN:
5044 if (!bfd_mach_o_read_main (abfd, command))
5045 return false;
5046 break;
5047 case BFD_MACH_O_LC_SOURCE_VERSION:
5048 if (!bfd_mach_o_read_source_version (abfd, command))
5049 return false;
5050 break;
5051 case BFD_MACH_O_LC_LINKER_OPTIONS:
5052 break;
5053 case BFD_MACH_O_LC_NOTE:
5054 if (!bfd_mach_o_read_note (abfd, command))
5055 return false;
5056 break;
5057 case BFD_MACH_O_LC_BUILD_VERSION:
5058 if (!bfd_mach_o_read_build_version (abfd, command))
5059 return false;
5060 break;
5061 default:
5062 command->len = 0;
5063 _bfd_error_handler (_("%pB: unknown load command %#x"),
5064 abfd, command->type);
5065 return false;
5066 }
5067
5068 return true;
5069 }
5070
5071 static bool
5072 bfd_mach_o_flatten_sections (bfd *abfd)
5073 {
5074 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5075 bfd_mach_o_load_command *cmd;
5076 long csect = 0;
5077 size_t amt;
5078
5079 /* Count total number of sections. */
5080 mdata->nsects = 0;
5081
5082 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5083 {
5084 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5085 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5086 {
5087 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5088
5089 mdata->nsects += seg->nsects;
5090 }
5091 }
5092
5093 /* Allocate sections array. */
5094 if (_bfd_mul_overflow (mdata->nsects, sizeof (bfd_mach_o_section *), &amt))
5095 {
5096 bfd_set_error (bfd_error_file_too_big);
5097 return false;
5098 }
5099 mdata->sections = bfd_alloc (abfd, amt);
5100 if (mdata->sections == NULL && mdata->nsects != 0)
5101 return false;
5102
5103 /* Fill the array. */
5104 csect = 0;
5105
5106 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5107 {
5108 if (cmd->type == BFD_MACH_O_LC_SEGMENT
5109 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)
5110 {
5111 bfd_mach_o_segment_command *seg = &cmd->command.segment;
5112 bfd_mach_o_section *sec;
5113
5114 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
5115
5116 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
5117 mdata->sections[csect++] = sec;
5118 }
5119 }
5120 return true;
5121 }
5122
5123 static bool
5124 bfd_mach_o_scan_start_address (bfd *abfd)
5125 {
5126 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5127 bfd_mach_o_thread_command *thr = NULL;
5128 bfd_mach_o_load_command *cmd;
5129 unsigned long i;
5130
5131 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5132 if (cmd->type == BFD_MACH_O_LC_THREAD
5133 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD)
5134 {
5135 thr = &cmd->command.thread;
5136 break;
5137 }
5138 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1)
5139 {
5140 bfd_mach_o_main_command *main_cmd = &cmd->command.main;
5141 bfd_mach_o_section *text_sect = mdata->sections[0];
5142
5143 if (text_sect)
5144 {
5145 abfd->start_address = main_cmd->entryoff
5146 + (text_sect->addr - text_sect->offset);
5147 return true;
5148 }
5149 }
5150
5151 /* An object file has no start address, so do not fail if not found. */
5152 if (thr == NULL)
5153 return true;
5154
5155 /* FIXME: create a subtarget hook ? */
5156 for (i = 0; i < thr->nflavours; i++)
5157 {
5158 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
5159 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32))
5160 {
5161 unsigned char buf[4];
5162
5163 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0
5164 || bfd_bread (buf, 4, abfd) != 4)
5165 return false;
5166
5167 abfd->start_address = bfd_h_get_32 (abfd, buf);
5168 }
5169 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
5170 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
5171 {
5172 unsigned char buf[4];
5173
5174 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5175 || bfd_bread (buf, 4, abfd) != 4)
5176 return false;
5177
5178 abfd->start_address = bfd_h_get_32 (abfd, buf);
5179 }
5180 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
5181 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
5182 {
5183 unsigned char buf[8];
5184
5185 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0
5186 || bfd_bread (buf, 8, abfd) != 8)
5187 return false;
5188
5189 abfd->start_address = bfd_h_get_64 (abfd, buf);
5190 }
5191 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
5192 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
5193 {
5194 unsigned char buf[8];
5195
5196 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0
5197 || bfd_bread (buf, 8, abfd) != 8)
5198 return false;
5199
5200 abfd->start_address = bfd_h_get_64 (abfd, buf);
5201 }
5202 }
5203
5204 return true;
5205 }
5206
5207 bool
5208 bfd_mach_o_set_arch_mach (bfd *abfd,
5209 enum bfd_architecture arch,
5210 unsigned long machine)
5211 {
5212 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5213
5214 /* If this isn't the right architecture for this backend, and this
5215 isn't the generic backend, fail. */
5216 if (arch != bed->arch
5217 && arch != bfd_arch_unknown
5218 && bed->arch != bfd_arch_unknown)
5219 return false;
5220
5221 return bfd_default_set_arch_mach (abfd, arch, machine);
5222 }
5223
5224 static bool
5225 bfd_mach_o_scan (bfd *abfd,
5226 bfd_mach_o_header *header,
5227 bfd_mach_o_data_struct *mdata)
5228 {
5229 unsigned int i;
5230 enum bfd_architecture cpu_type;
5231 unsigned long cpu_subtype;
5232 unsigned int hdrsize;
5233
5234 hdrsize = mach_o_wide_p (header) ?
5235 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
5236
5237 mdata->header = *header;
5238
5239 abfd->flags = abfd->flags & BFD_IN_MEMORY;
5240 switch (header->filetype)
5241 {
5242 case BFD_MACH_O_MH_OBJECT:
5243 abfd->flags |= HAS_RELOC;
5244 break;
5245 case BFD_MACH_O_MH_EXECUTE:
5246 abfd->flags |= EXEC_P;
5247 break;
5248 case BFD_MACH_O_MH_DYLIB:
5249 case BFD_MACH_O_MH_BUNDLE:
5250 abfd->flags |= DYNAMIC;
5251 break;
5252 }
5253
5254 abfd->tdata.mach_o_data = mdata;
5255
5256 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
5257 &cpu_type, &cpu_subtype);
5258 if (cpu_type == bfd_arch_unknown)
5259 {
5260 _bfd_error_handler
5261 /* xgettext:c-format */
5262 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
5263 header->cputype, header->cpusubtype);
5264 return false;
5265 }
5266
5267 bfd_set_arch_mach (abfd, cpu_type, cpu_subtype);
5268
5269 if (header->ncmds != 0)
5270 {
5271 bfd_mach_o_load_command *cmd;
5272 size_t amt;
5273 ufile_ptr filesize = bfd_get_file_size (abfd);
5274
5275 if (filesize == 0)
5276 filesize = (ufile_ptr) -1;
5277
5278 mdata->first_command = NULL;
5279 mdata->last_command = NULL;
5280
5281 if (header->ncmds > (filesize - hdrsize) / BFD_MACH_O_LC_SIZE)
5282 {
5283 bfd_set_error (bfd_error_file_truncated);
5284 return false;
5285 }
5286 if (_bfd_mul_overflow (header->ncmds,
5287 sizeof (bfd_mach_o_load_command), &amt))
5288 {
5289 bfd_set_error (bfd_error_file_too_big);
5290 return false;
5291 }
5292 cmd = bfd_alloc (abfd, amt);
5293 if (cmd == NULL)
5294 return false;
5295
5296 for (i = 0; i < header->ncmds; i++)
5297 {
5298 bfd_mach_o_load_command *cur = &cmd[i];
5299
5300 bfd_mach_o_append_command (abfd, cur);
5301
5302 if (i == 0)
5303 cur->offset = hdrsize;
5304 else
5305 {
5306 bfd_mach_o_load_command *prev = &cmd[i - 1];
5307 cur->offset = prev->offset + prev->len;
5308 }
5309
5310 if (!bfd_mach_o_read_command (abfd, cur, filesize))
5311 return false;
5312 }
5313 }
5314
5315 /* Sections should be flatten before scanning start address. */
5316 if (!bfd_mach_o_flatten_sections (abfd))
5317 return false;
5318 if (!bfd_mach_o_scan_start_address (abfd))
5319 return false;
5320
5321 return true;
5322 }
5323
5324 bool
5325 bfd_mach_o_mkobject_init (bfd *abfd)
5326 {
5327 bfd_mach_o_data_struct *mdata = NULL;
5328
5329 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
5330 if (mdata == NULL)
5331 return false;
5332 abfd->tdata.mach_o_data = mdata;
5333
5334 mdata->header.magic = 0;
5335 mdata->header.cputype = 0;
5336 mdata->header.cpusubtype = 0;
5337 mdata->header.filetype = 0;
5338 mdata->header.ncmds = 0;
5339 mdata->header.sizeofcmds = 0;
5340 mdata->header.flags = 0;
5341 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
5342 mdata->first_command = NULL;
5343 mdata->last_command = NULL;
5344 mdata->nsects = 0;
5345 mdata->sections = NULL;
5346 mdata->dyn_reloc_cache = NULL;
5347
5348 return true;
5349 }
5350
5351 static bool
5352 bfd_mach_o_gen_mkobject (bfd *abfd)
5353 {
5354 bfd_mach_o_data_struct *mdata;
5355
5356 if (!bfd_mach_o_mkobject_init (abfd))
5357 return false;
5358
5359 mdata = bfd_mach_o_get_data (abfd);
5360 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
5361 mdata->header.cputype = 0;
5362 mdata->header.cpusubtype = 0;
5363 mdata->header.byteorder = abfd->xvec->byteorder;
5364 mdata->header.version = 1;
5365
5366 return true;
5367 }
5368
5369 bfd_cleanup
5370 bfd_mach_o_header_p (bfd *abfd,
5371 file_ptr hdr_off,
5372 bfd_mach_o_filetype file_type,
5373 bfd_mach_o_cpu_type cpu_type)
5374 {
5375 bfd_mach_o_header header;
5376 bfd_mach_o_data_struct *mdata;
5377
5378 if (!bfd_mach_o_read_header (abfd, hdr_off, &header))
5379 goto wrong;
5380
5381 if (! (header.byteorder == BFD_ENDIAN_BIG
5382 || header.byteorder == BFD_ENDIAN_LITTLE))
5383 {
5384 _bfd_error_handler (_("unknown header byte-order value %#x"),
5385 header.byteorder);
5386 goto wrong;
5387 }
5388
5389 if (! ((header.byteorder == BFD_ENDIAN_BIG
5390 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
5391 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
5392 || (header.byteorder == BFD_ENDIAN_LITTLE
5393 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
5394 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
5395 goto wrong;
5396
5397 /* Check cputype and filetype.
5398 In case of wildcard, do not accept magics that are handled by existing
5399 targets. */
5400 if (cpu_type)
5401 {
5402 if (header.cputype != cpu_type)
5403 goto wrong;
5404 }
5405 else
5406 {
5407 #ifndef BFD64
5408 /* Do not recognize 64 architectures if not configured for 64bit targets.
5409 This could happen only for generic targets. */
5410 if (mach_o_wide_p (&header))
5411 goto wrong;
5412 #endif
5413 }
5414
5415 if (file_type)
5416 {
5417 if (header.filetype != file_type)
5418 goto wrong;
5419 }
5420 else
5421 {
5422 switch (header.filetype)
5423 {
5424 case BFD_MACH_O_MH_CORE:
5425 /* Handled by core_p */
5426 goto wrong;
5427 default:
5428 break;
5429 }
5430 }
5431
5432 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
5433 if (mdata == NULL)
5434 goto fail;
5435 mdata->hdr_offset = hdr_off;
5436
5437 if (!bfd_mach_o_scan (abfd, &header, mdata))
5438 goto wrong;
5439
5440 return _bfd_no_cleanup;
5441
5442 wrong:
5443 bfd_set_error (bfd_error_wrong_format);
5444
5445 fail:
5446 return NULL;
5447 }
5448
5449 static bfd_cleanup
5450 bfd_mach_o_gen_object_p (bfd *abfd)
5451 {
5452 return bfd_mach_o_header_p (abfd, 0, 0, 0);
5453 }
5454
5455 static bfd_cleanup
5456 bfd_mach_o_gen_core_p (bfd *abfd)
5457 {
5458 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0);
5459 }
5460
5461 /* Return the base address of ABFD, ie the address at which the image is
5462 mapped. The possible initial pagezero is ignored. */
5463
5464 bfd_vma
5465 bfd_mach_o_get_base_address (bfd *abfd)
5466 {
5467 bfd_mach_o_data_struct *mdata;
5468 bfd_mach_o_load_command *cmd;
5469
5470 /* Check for Mach-O. */
5471 if (!bfd_mach_o_valid (abfd))
5472 return 0;
5473 mdata = bfd_mach_o_get_data (abfd);
5474
5475 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5476 {
5477 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
5478 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
5479 {
5480 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
5481
5482 if (segcmd->initprot != 0)
5483 return segcmd->vmaddr;
5484 }
5485 }
5486 return 0;
5487 }
5488
5489 typedef struct mach_o_fat_archentry
5490 {
5491 unsigned long cputype;
5492 unsigned long cpusubtype;
5493 unsigned long offset;
5494 unsigned long size;
5495 unsigned long align;
5496 } mach_o_fat_archentry;
5497
5498 typedef struct mach_o_fat_data_struct
5499 {
5500 unsigned long magic;
5501 unsigned long nfat_arch;
5502 mach_o_fat_archentry *archentries;
5503 } mach_o_fat_data_struct;
5504
5505 bfd_cleanup
5506 bfd_mach_o_fat_archive_p (bfd *abfd)
5507 {
5508 mach_o_fat_data_struct *adata = NULL;
5509 struct mach_o_fat_header_external hdr;
5510 unsigned long i;
5511 size_t amt;
5512
5513 if (bfd_seek (abfd, 0, SEEK_SET) != 0
5514 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
5515 goto error;
5516
5517 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
5518 if (adata == NULL)
5519 goto error;
5520
5521 adata->magic = bfd_getb32 (hdr.magic);
5522 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
5523 if (adata->magic != 0xcafebabe)
5524 goto error;
5525 /* Avoid matching Java bytecode files, which have the same magic number.
5526 In the Java bytecode file format this field contains the JVM version,
5527 which starts at 43.0. */
5528 if (adata->nfat_arch > 30)
5529 goto error;
5530
5531 if (_bfd_mul_overflow (adata->nfat_arch,
5532 sizeof (mach_o_fat_archentry), &amt))
5533 {
5534 bfd_set_error (bfd_error_file_too_big);
5535 goto error;
5536 }
5537 adata->archentries = bfd_alloc (abfd, amt);
5538 if (adata->archentries == NULL)
5539 goto error;
5540
5541 for (i = 0; i < adata->nfat_arch; i++)
5542 {
5543 struct mach_o_fat_arch_external arch;
5544 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
5545 goto error;
5546 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
5547 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
5548 adata->archentries[i].offset = bfd_getb32 (arch.offset);
5549 adata->archentries[i].size = bfd_getb32 (arch.size);
5550 adata->archentries[i].align = bfd_getb32 (arch.align);
5551 }
5552
5553 abfd->tdata.mach_o_fat_data = adata;
5554
5555 return _bfd_no_cleanup;
5556
5557 error:
5558 if (adata != NULL)
5559 bfd_release (abfd, adata);
5560 bfd_set_error (bfd_error_wrong_format);
5561 return NULL;
5562 }
5563
5564 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
5565 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
5566 Set arelt_data and origin fields too. */
5567
5568 static bool
5569 bfd_mach_o_fat_member_init (bfd *abfd,
5570 enum bfd_architecture arch_type,
5571 unsigned long arch_subtype,
5572 mach_o_fat_archentry *entry)
5573 {
5574 struct areltdata *areltdata;
5575 /* Create the member filename. Use ARCH_NAME. */
5576 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
5577 const char *filename;
5578
5579 if (ap)
5580 {
5581 /* Use the architecture name if known. */
5582 filename = bfd_set_filename (abfd, ap->printable_name);
5583 }
5584 else
5585 {
5586 /* Forge a uniq id. */
5587 char buf[2 + 8 + 1 + 2 + 8 + 1];
5588 snprintf (buf, sizeof (buf), "0x%lx-0x%lx",
5589 entry->cputype, entry->cpusubtype);
5590 filename = bfd_set_filename (abfd, buf);
5591 }
5592 if (!filename)
5593 return false;
5594
5595 areltdata = bfd_zmalloc (sizeof (struct areltdata));
5596 if (areltdata == NULL)
5597 return false;
5598 areltdata->parsed_size = entry->size;
5599 abfd->arelt_data = areltdata;
5600 abfd->iostream = NULL;
5601 abfd->origin = entry->offset;
5602 return true;
5603 }
5604
5605 bfd *
5606 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev)
5607 {
5608 mach_o_fat_data_struct *adata;
5609 mach_o_fat_archentry *entry = NULL;
5610 unsigned long i;
5611 bfd *nbfd;
5612 enum bfd_architecture arch_type;
5613 unsigned long arch_subtype;
5614
5615 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
5616 BFD_ASSERT (adata != NULL);
5617
5618 /* Find index of previous entry. */
5619 if (prev == NULL)
5620 {
5621 /* Start at first one. */
5622 i = 0;
5623 }
5624 else
5625 {
5626 /* Find index of PREV. */
5627 for (i = 0; i < adata->nfat_arch; i++)
5628 {
5629 if (adata->archentries[i].offset == prev->origin)
5630 break;
5631 }
5632
5633 if (i == adata->nfat_arch)
5634 {
5635 /* Not found. */
5636 bfd_set_error (bfd_error_bad_value);
5637 return NULL;
5638 }
5639
5640 /* Get next entry. */
5641 i++;
5642 }
5643
5644 if (i >= adata->nfat_arch)
5645 {
5646 bfd_set_error (bfd_error_no_more_archived_files);
5647 return NULL;
5648 }
5649
5650 entry = &adata->archentries[i];
5651 nbfd = _bfd_new_bfd_contained_in (archive);
5652 if (nbfd == NULL)
5653 return NULL;
5654
5655 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
5656 &arch_type, &arch_subtype);
5657
5658 if (!bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry))
5659 {
5660 bfd_close (nbfd);
5661 return NULL;
5662 }
5663
5664 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
5665
5666 return nbfd;
5667 }
5668
5669 /* Analogous to stat call. */
5670
5671 static int
5672 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
5673 {
5674 if (abfd->arelt_data == NULL)
5675 {
5676 bfd_set_error (bfd_error_invalid_operation);
5677 return -1;
5678 }
5679
5680 buf->st_mtime = 0;
5681 buf->st_uid = 0;
5682 buf->st_gid = 0;
5683 buf->st_mode = 0644;
5684 buf->st_size = arelt_size (abfd);
5685
5686 return 0;
5687 }
5688
5689 /* If ABFD format is FORMAT and architecture is ARCH, return it.
5690 If ABFD is a fat image containing a member that corresponds to FORMAT
5691 and ARCH, returns it.
5692 In other case, returns NULL.
5693 This function allows transparent uses of fat images. */
5694
5695 bfd *
5696 bfd_mach_o_fat_extract (bfd *abfd,
5697 bfd_format format,
5698 const bfd_arch_info_type *arch)
5699 {
5700 bfd *res;
5701 mach_o_fat_data_struct *adata;
5702 unsigned int i;
5703
5704 if (bfd_check_format (abfd, format))
5705 {
5706 if (bfd_get_arch_info (abfd) == arch)
5707 return abfd;
5708 return NULL;
5709 }
5710 if (!bfd_check_format (abfd, bfd_archive)
5711 || abfd->xvec != &mach_o_fat_vec)
5712 return NULL;
5713
5714 /* This is a Mach-O fat image. */
5715 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
5716 BFD_ASSERT (adata != NULL);
5717
5718 for (i = 0; i < adata->nfat_arch; i++)
5719 {
5720 struct mach_o_fat_archentry *e = &adata->archentries[i];
5721 enum bfd_architecture cpu_type;
5722 unsigned long cpu_subtype;
5723
5724 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
5725 &cpu_type, &cpu_subtype);
5726 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
5727 continue;
5728
5729 /* The architecture is found. */
5730 res = _bfd_new_bfd_contained_in (abfd);
5731 if (res == NULL)
5732 return NULL;
5733
5734 if (bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e)
5735 && bfd_check_format (res, format))
5736 {
5737 BFD_ASSERT (bfd_get_arch_info (res) == arch);
5738 return res;
5739 }
5740 bfd_close (res);
5741 return NULL;
5742 }
5743
5744 return NULL;
5745 }
5746
5747 static bool
5748 bfd_mach_o_fat_close_and_cleanup (bfd *abfd)
5749 {
5750 _bfd_unlink_from_archive_parent (abfd);
5751 return true;
5752 }
5753
5754 int
5755 bfd_mach_o_lookup_command (bfd *abfd,
5756 bfd_mach_o_load_command_type type,
5757 bfd_mach_o_load_command **mcommand)
5758 {
5759 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5760 struct bfd_mach_o_load_command *cmd;
5761 unsigned int num;
5762
5763 BFD_ASSERT (mdata != NULL);
5764 BFD_ASSERT (mcommand != NULL);
5765
5766 num = 0;
5767 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5768 {
5769 if (cmd->type != type)
5770 continue;
5771
5772 if (num == 0)
5773 *mcommand = cmd;
5774 num++;
5775 }
5776
5777 return num;
5778 }
5779
5780 unsigned long
5781 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
5782 {
5783 switch (type)
5784 {
5785 case BFD_MACH_O_CPU_TYPE_MC680x0:
5786 return 0x04000000;
5787 case BFD_MACH_O_CPU_TYPE_POWERPC:
5788 return 0xc0000000;
5789 case BFD_MACH_O_CPU_TYPE_I386:
5790 return 0xc0000000;
5791 case BFD_MACH_O_CPU_TYPE_SPARC:
5792 return 0xf0000000;
5793 case BFD_MACH_O_CPU_TYPE_HPPA:
5794 return 0xc0000000 - 0x04000000;
5795 default:
5796 return 0;
5797 }
5798 }
5799
5800 /* The following two tables should be kept, as far as possible, in order of
5801 most frequently used entries to optimize their use from gas. */
5802
5803 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
5804 {
5805 { "regular", BFD_MACH_O_S_REGULAR},
5806 { "coalesced", BFD_MACH_O_S_COALESCED},
5807 { "zerofill", BFD_MACH_O_S_ZEROFILL},
5808 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
5809 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
5810 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
5811 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
5812 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
5813 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
5814 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
5815 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
5816 { "interposing", BFD_MACH_O_S_INTERPOSING},
5817 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
5818 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
5819 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
5820 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
5821 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
5822 { NULL, 0}
5823 };
5824
5825 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
5826 {
5827 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
5828 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
5829 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
5830 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
5831 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
5832 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
5833 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
5834 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
5835 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
5836 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5837 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
5838 { NULL, 0}
5839 };
5840
5841 /* Get the section type from NAME. Return 256 if NAME is unknown. */
5842
5843 unsigned int
5844 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
5845 {
5846 const bfd_mach_o_xlat_name *x;
5847 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
5848
5849 for (x = bfd_mach_o_section_type_name; x->name; x++)
5850 if (strcmp (x->name, name) == 0)
5851 {
5852 /* We found it... does the target support it? */
5853 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
5854 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
5855 return x->val; /* OK. */
5856 else
5857 break; /* Not supported. */
5858 }
5859 /* Maximum section ID = 0xff. */
5860 return 256;
5861 }
5862
5863 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
5864
5865 unsigned int
5866 bfd_mach_o_get_section_attribute_from_name (const char *name)
5867 {
5868 const bfd_mach_o_xlat_name *x;
5869
5870 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
5871 if (strcmp (x->name, name) == 0)
5872 return x->val;
5873 return (unsigned int)-1;
5874 }
5875
5876 int
5877 bfd_mach_o_core_fetch_environment (bfd *abfd,
5878 unsigned char **rbuf,
5879 unsigned int *rlen)
5880 {
5881 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5882 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
5883 bfd_mach_o_load_command *cmd;
5884
5885 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next)
5886 {
5887 bfd_mach_o_segment_command *seg;
5888
5889 if (cmd->type != BFD_MACH_O_LC_SEGMENT)
5890 continue;
5891
5892 seg = &cmd->command.segment;
5893
5894 if ((seg->vmaddr + seg->vmsize) == stackaddr)
5895 {
5896 unsigned long start = seg->fileoff;
5897 unsigned long end = seg->fileoff + seg->filesize;
5898 unsigned char *buf = bfd_malloc (1024);
5899 unsigned long size = 1024;
5900
5901 if (buf == NULL)
5902 return -1;
5903 for (;;)
5904 {
5905 bfd_size_type nread = 0;
5906 unsigned long offset;
5907 int found_nonnull = 0;
5908
5909 if (size > (end - start))
5910 size = (end - start);
5911
5912 buf = bfd_realloc_or_free (buf, size);
5913 if (buf == NULL)
5914 return -1;
5915
5916 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
5917 {
5918 free (buf);
5919 return -1;
5920 }
5921
5922 nread = bfd_bread (buf, size, abfd);
5923
5924 if (nread != size)
5925 {
5926 free (buf);
5927 return -1;
5928 }
5929
5930 for (offset = 4; offset <= size; offset += 4)
5931 {
5932 unsigned long val;
5933
5934 val = bfd_get_32(abfd, buf + size - offset);
5935
5936 if (! found_nonnull)
5937 {
5938 if (val != 0)
5939 found_nonnull = 1;
5940 }
5941 else if (val == 0x0)
5942 {
5943 unsigned long bottom;
5944 unsigned long top;
5945
5946 bottom = seg->fileoff + seg->filesize - offset;
5947 top = seg->fileoff + seg->filesize - 4;
5948 *rbuf = bfd_malloc (top - bottom);
5949 if (*rbuf == NULL)
5950 return -1;
5951 *rlen = top - bottom;
5952
5953 memcpy (*rbuf, buf + size - *rlen, *rlen);
5954 free (buf);
5955 return 0;
5956 }
5957 }
5958
5959 if (size == (end - start))
5960 break;
5961
5962 size *= 2;
5963 }
5964
5965 free (buf);
5966 }
5967 }
5968
5969 return -1;
5970 }
5971
5972 char *
5973 bfd_mach_o_core_file_failing_command (bfd *abfd)
5974 {
5975 unsigned char *buf = NULL;
5976 unsigned int len = 0;
5977 int ret;
5978
5979 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
5980 if (ret < 0)
5981 return NULL;
5982
5983 return (char *) buf;
5984 }
5985
5986 int
5987 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
5988 {
5989 return 0;
5990 }
5991
5992 static bfd_mach_o_uuid_command *
5993 bfd_mach_o_lookup_uuid_command (bfd *abfd)
5994 {
5995 bfd_mach_o_load_command *uuid_cmd = NULL;
5996 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
5997 if (ncmd != 1 || uuid_cmd == NULL)
5998 return false;
5999 return &uuid_cmd->command.uuid;
6000 }
6001
6002 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
6003
6004 static bool
6005 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
6006 {
6007 bfd_mach_o_uuid_command *dsym_uuid_cmd;
6008
6009 BFD_ASSERT (abfd);
6010 BFD_ASSERT (uuid_cmd);
6011
6012 if (!bfd_check_format (abfd, bfd_object))
6013 return false;
6014
6015 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
6016 || bfd_mach_o_get_data (abfd) == NULL
6017 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
6018 return false;
6019
6020 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
6021 if (dsym_uuid_cmd == NULL)
6022 return false;
6023
6024 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
6025 sizeof (uuid_cmd->uuid)) != 0)
6026 return false;
6027
6028 return true;
6029 }
6030
6031 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
6032 The caller is responsible for closing the returned BFD object and
6033 its my_archive if the returned BFD is in a fat dSYM. */
6034
6035 static bfd *
6036 bfd_mach_o_find_dsym (const char *dsym_filename,
6037 const bfd_mach_o_uuid_command *uuid_cmd,
6038 const bfd_arch_info_type *arch)
6039 {
6040 bfd *base_dsym_bfd, *dsym_bfd;
6041
6042 BFD_ASSERT (uuid_cmd);
6043
6044 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
6045 if (base_dsym_bfd == NULL)
6046 return NULL;
6047
6048 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
6049 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
6050 return dsym_bfd;
6051
6052 bfd_close (dsym_bfd);
6053 if (base_dsym_bfd != dsym_bfd)
6054 bfd_close (base_dsym_bfd);
6055
6056 return NULL;
6057 }
6058
6059 /* Return a BFD created from a dSYM file for ABFD.
6060 The caller is responsible for closing the returned BFD object, its
6061 filename, and its my_archive if the returned BFD is in a fat dSYM. */
6062
6063 static bfd *
6064 bfd_mach_o_follow_dsym (bfd *abfd)
6065 {
6066 char *dsym_filename;
6067 bfd_mach_o_uuid_command *uuid_cmd;
6068 bfd *dsym_bfd, *base_bfd = abfd;
6069 const char *base_basename;
6070
6071 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
6072 return NULL;
6073
6074 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
6075 base_bfd = abfd->my_archive;
6076 /* BFD may have been opened from a stream. */
6077 if (bfd_get_filename (base_bfd) == NULL)
6078 {
6079 bfd_set_error (bfd_error_invalid_operation);
6080 return NULL;
6081 }
6082 base_basename = lbasename (bfd_get_filename (base_bfd));
6083
6084 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
6085 if (uuid_cmd == NULL)
6086 return NULL;
6087
6088 /* TODO: We assume the DWARF file has the same as the binary's.
6089 It seems apple's GDB checks all files in the dSYM bundle directory.
6090 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
6091 */
6092 dsym_filename = (char *)bfd_malloc (strlen (bfd_get_filename (base_bfd))
6093 + strlen (dsym_subdir) + 1
6094 + strlen (base_basename) + 1);
6095 if (dsym_filename == NULL)
6096 return NULL;
6097
6098 sprintf (dsym_filename, "%s%s/%s",
6099 bfd_get_filename (base_bfd), dsym_subdir, base_basename);
6100
6101 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
6102 bfd_get_arch_info (abfd));
6103 if (dsym_bfd == NULL)
6104 free (dsym_filename);
6105
6106 return dsym_bfd;
6107 }
6108
6109 bool
6110 bfd_mach_o_find_nearest_line (bfd *abfd,
6111 asymbol **symbols,
6112 asection *section,
6113 bfd_vma offset,
6114 const char **filename_ptr,
6115 const char **functionname_ptr,
6116 unsigned int *line_ptr,
6117 unsigned int *discriminator_ptr)
6118 {
6119 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6120 if (mdata == NULL)
6121 return false;
6122 switch (mdata->header.filetype)
6123 {
6124 case BFD_MACH_O_MH_OBJECT:
6125 break;
6126 case BFD_MACH_O_MH_EXECUTE:
6127 case BFD_MACH_O_MH_DYLIB:
6128 case BFD_MACH_O_MH_BUNDLE:
6129 case BFD_MACH_O_MH_KEXT_BUNDLE:
6130 if (mdata->dwarf2_find_line_info == NULL)
6131 {
6132 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
6133 /* When we couldn't find dSYM for this binary, we look for
6134 the debug information in the binary itself. In this way,
6135 we won't try finding separated dSYM again because
6136 mdata->dwarf2_find_line_info will be filled. */
6137 if (! mdata->dsym_bfd)
6138 break;
6139 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
6140 dwarf_debug_sections, symbols,
6141 &mdata->dwarf2_find_line_info,
6142 false))
6143 return false;
6144 }
6145 break;
6146 default:
6147 return false;
6148 }
6149 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6150 filename_ptr, functionname_ptr,
6151 line_ptr, discriminator_ptr,
6152 dwarf_debug_sections,
6153 &mdata->dwarf2_find_line_info);
6154 }
6155
6156 bool
6157 bfd_mach_o_close_and_cleanup (bfd *abfd)
6158 {
6159 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6160 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
6161 {
6162 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
6163 bfd_mach_o_free_cached_info (abfd);
6164 if (mdata->dsym_bfd != NULL)
6165 {
6166 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
6167 #if 0
6168 /* FIXME: PR 19435: This calculation to find the memory allocated by
6169 bfd_mach_o_follow_dsym for the filename does not always end up
6170 selecting the correct pointer. Unfortunately this problem is
6171 very hard to reproduce on a non Mach-O native system, so until it
6172 can be traced and fixed on such a system, this code will remain
6173 commented out. This does mean that there will be a memory leak,
6174 but it is small, and happens when we are closing down, so it
6175 should not matter too much. */
6176 char *dsym_filename = (char *)(fat_bfd
6177 ? bfd_get_filename (fat_bfd)
6178 : bfd_get_filename (mdata->dsym_bfd));
6179 #endif
6180 bfd_close (mdata->dsym_bfd);
6181 mdata->dsym_bfd = NULL;
6182 if (fat_bfd)
6183 bfd_close (fat_bfd);
6184 #if 0
6185 free (dsym_filename);
6186 #endif
6187 }
6188 }
6189
6190 return _bfd_generic_close_and_cleanup (abfd);
6191 }
6192
6193 bool
6194 bfd_mach_o_free_cached_info (bfd *abfd)
6195 {
6196 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
6197 asection *asect;
6198 free (mdata->dyn_reloc_cache);
6199 mdata->dyn_reloc_cache = NULL;
6200 for (asect = abfd->sections; asect != NULL; asect = asect->next)
6201 {
6202 free (asect->relocation);
6203 asect->relocation = NULL;
6204 }
6205
6206 return true;
6207 }
6208
6209 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
6210 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
6211
6212 #define bfd_mach_o_canonicalize_one_reloc NULL
6213 #define bfd_mach_o_swap_reloc_out NULL
6214 #define bfd_mach_o_print_thread NULL
6215 #define bfd_mach_o_tgt_seg_table NULL
6216 #define bfd_mach_o_section_type_valid_for_tgt NULL
6217
6218 #define TARGET_NAME mach_o_be_vec
6219 #define TARGET_STRING "mach-o-be"
6220 #define TARGET_ARCHITECTURE bfd_arch_unknown
6221 #define TARGET_PAGESIZE 1
6222 #define TARGET_BIG_ENDIAN 1
6223 #define TARGET_ARCHIVE 0
6224 #define TARGET_PRIORITY 1
6225 #include "mach-o-target.c"
6226
6227 #undef TARGET_NAME
6228 #undef TARGET_STRING
6229 #undef TARGET_ARCHITECTURE
6230 #undef TARGET_PAGESIZE
6231 #undef TARGET_BIG_ENDIAN
6232 #undef TARGET_ARCHIVE
6233 #undef TARGET_PRIORITY
6234
6235 #define TARGET_NAME mach_o_le_vec
6236 #define TARGET_STRING "mach-o-le"
6237 #define TARGET_ARCHITECTURE bfd_arch_unknown
6238 #define TARGET_PAGESIZE 1
6239 #define TARGET_BIG_ENDIAN 0
6240 #define TARGET_ARCHIVE 0
6241 #define TARGET_PRIORITY 1
6242
6243 #include "mach-o-target.c"
6244
6245 #undef TARGET_NAME
6246 #undef TARGET_STRING
6247 #undef TARGET_ARCHITECTURE
6248 #undef TARGET_PAGESIZE
6249 #undef TARGET_BIG_ENDIAN
6250 #undef TARGET_ARCHIVE
6251 #undef TARGET_PRIORITY
6252
6253 /* Not yet handled: creating an archive. */
6254 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
6255
6256 #define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup
6257
6258 /* Not used. */
6259 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
6260 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file
6261 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p
6262
6263 #define TARGET_NAME mach_o_fat_vec
6264 #define TARGET_STRING "mach-o-fat"
6265 #define TARGET_ARCHITECTURE bfd_arch_unknown
6266 #define TARGET_PAGESIZE 1
6267 #define TARGET_BIG_ENDIAN 1
6268 #define TARGET_ARCHIVE 1
6269 #define TARGET_PRIORITY 0
6270
6271 #include "mach-o-target.c"
6272
6273 #undef TARGET_NAME
6274 #undef TARGET_STRING
6275 #undef TARGET_ARCHITECTURE
6276 #undef TARGET_PAGESIZE
6277 #undef TARGET_BIG_ENDIAN
6278 #undef TARGET_ARCHIVE
6279 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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