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[deliverable/binutils-gdb.git] / bfd / mach-o.c
1 /* Mach-O support for BFD.
2 Copyright (C) 1999-2014 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "aout/stab_gnu.h"
27 #include "mach-o/reloc.h"
28 #include "mach-o/external.h"
29 #include <ctype.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p
34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p
35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject
36
37 #define FILE_ALIGN(off, algn) \
38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
39
40 unsigned int
41 bfd_mach_o_version (bfd *abfd)
42 {
43 bfd_mach_o_data_struct *mdata = NULL;
44
45 BFD_ASSERT (bfd_mach_o_valid (abfd));
46 mdata = bfd_mach_o_get_data (abfd);
47
48 return mdata->header.version;
49 }
50
51 bfd_boolean
52 bfd_mach_o_valid (bfd *abfd)
53 {
54 if (abfd == NULL || abfd->xvec == NULL)
55 return FALSE;
56
57 if (abfd->xvec->flavour != bfd_target_mach_o_flavour)
58 return FALSE;
59
60 if (bfd_mach_o_get_data (abfd) == NULL)
61 return FALSE;
62 return TRUE;
63 }
64
65 static INLINE bfd_boolean
66 mach_o_wide_p (bfd_mach_o_header *header)
67 {
68 switch (header->version)
69 {
70 case 1:
71 return FALSE;
72 case 2:
73 return TRUE;
74 default:
75 BFD_FAIL ();
76 return FALSE;
77 }
78 }
79
80 static INLINE bfd_boolean
81 bfd_mach_o_wide_p (bfd *abfd)
82 {
83 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header);
84 }
85
86 /* Tables to translate well known Mach-O segment/section names to bfd
87 names. Use of canonical names (such as .text or .debug_frame) is required
88 by gdb. */
89
90 /* __TEXT Segment. */
91 static const mach_o_section_name_xlat text_section_names_xlat[] =
92 {
93 { ".text", "__text",
94 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
95 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0},
96 { ".const", "__const",
97 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
98 BFD_MACH_O_S_ATTR_NONE, 0},
99 { ".static_const", "__static_const",
100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
101 BFD_MACH_O_S_ATTR_NONE, 0},
102 { ".cstring", "__cstring",
103 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS,
104 BFD_MACH_O_S_CSTRING_LITERALS,
105 BFD_MACH_O_S_ATTR_NONE, 0},
106 { ".literal4", "__literal4",
107 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS,
108 BFD_MACH_O_S_ATTR_NONE, 2},
109 { ".literal8", "__literal8",
110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS,
111 BFD_MACH_O_S_ATTR_NONE, 3},
112 { ".literal16", "__literal16",
113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS,
114 BFD_MACH_O_S_ATTR_NONE, 4},
115 { ".constructor", "__constructor",
116 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
117 BFD_MACH_O_S_ATTR_NONE, 0},
118 { ".destructor", "__destructor",
119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
120 BFD_MACH_O_S_ATTR_NONE, 0},
121 { ".eh_frame", "__eh_frame",
122 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
123 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
124 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
125 | BFD_MACH_O_S_ATTR_NO_TOC, 2},
126 { NULL, NULL, 0, 0, 0, 0}
127 };
128
129 /* __DATA Segment. */
130 static const mach_o_section_name_xlat data_section_names_xlat[] =
131 {
132 { ".data", "__data",
133 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
134 BFD_MACH_O_S_ATTR_NONE, 0},
135 { ".bss", "__bss",
136 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL,
137 BFD_MACH_O_S_ATTR_NONE, 0},
138 { ".const_data", "__const",
139 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
140 BFD_MACH_O_S_ATTR_NONE, 0},
141 { ".static_data", "__static_data",
142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
143 BFD_MACH_O_S_ATTR_NONE, 0},
144 { ".mod_init_func", "__mod_init_func",
145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS,
146 BFD_MACH_O_S_ATTR_NONE, 2},
147 { ".mod_term_func", "__mod_term_func",
148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS,
149 BFD_MACH_O_S_ATTR_NONE, 2},
150 { ".dyld", "__dyld",
151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
152 BFD_MACH_O_S_ATTR_NONE, 0},
153 { ".cfstring", "__cfstring",
154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
155 BFD_MACH_O_S_ATTR_NONE, 2},
156 { NULL, NULL, 0, 0, 0, 0}
157 };
158
159 /* __DWARF Segment. */
160 static const mach_o_section_name_xlat dwarf_section_names_xlat[] =
161 {
162 { ".debug_frame", "__debug_frame",
163 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
164 BFD_MACH_O_S_ATTR_DEBUG, 0},
165 { ".debug_info", "__debug_info",
166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
167 BFD_MACH_O_S_ATTR_DEBUG, 0},
168 { ".debug_abbrev", "__debug_abbrev",
169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
170 BFD_MACH_O_S_ATTR_DEBUG, 0},
171 { ".debug_aranges", "__debug_aranges",
172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
173 BFD_MACH_O_S_ATTR_DEBUG, 0},
174 { ".debug_macinfo", "__debug_macinfo",
175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
176 BFD_MACH_O_S_ATTR_DEBUG, 0},
177 { ".debug_line", "__debug_line",
178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
179 BFD_MACH_O_S_ATTR_DEBUG, 0},
180 { ".debug_loc", "__debug_loc",
181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
182 BFD_MACH_O_S_ATTR_DEBUG, 0},
183 { ".debug_pubnames", "__debug_pubnames",
184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
185 BFD_MACH_O_S_ATTR_DEBUG, 0},
186 { ".debug_pubtypes", "__debug_pubtypes",
187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
188 BFD_MACH_O_S_ATTR_DEBUG, 0},
189 { ".debug_str", "__debug_str",
190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
191 BFD_MACH_O_S_ATTR_DEBUG, 0},
192 { ".debug_ranges", "__debug_ranges",
193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
194 BFD_MACH_O_S_ATTR_DEBUG, 0},
195 { ".debug_macro", "__debug_macro",
196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
197 BFD_MACH_O_S_ATTR_DEBUG, 0},
198 { ".debug_gdb_scripts", "__debug_gdb_scri",
199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR,
200 BFD_MACH_O_S_ATTR_DEBUG, 0},
201 { NULL, NULL, 0, 0, 0, 0}
202 };
203
204 /* __OBJC Segment. */
205 static const mach_o_section_name_xlat objc_section_names_xlat[] =
206 {
207 { ".objc_class", "__class",
208 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
209 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
210 { ".objc_meta_class", "__meta_class",
211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
213 { ".objc_cat_cls_meth", "__cat_cls_meth",
214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
216 { ".objc_cat_inst_meth", "__cat_inst_meth",
217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
219 { ".objc_protocol", "__protocol",
220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
222 { ".objc_string_object", "__string_object",
223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
225 { ".objc_cls_meth", "__cls_meth",
226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
228 { ".objc_inst_meth", "__inst_meth",
229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
231 { ".objc_cls_refs", "__cls_refs",
232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
234 { ".objc_message_refs", "__message_refs",
235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS,
236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
237 { ".objc_symbols", "__symbols",
238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
240 { ".objc_category", "__category",
241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
243 { ".objc_class_vars", "__class_vars",
244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
246 { ".objc_instance_vars", "__instance_vars",
247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
249 { ".objc_module_info", "__module_info",
250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
252 { ".objc_selector_strs", "__selector_strs",
253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS,
254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
255 { ".objc_image_info", "__image_info",
256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
258 { ".objc_selector_fixup", "__sel_fixup",
259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
261 /* Objc V1 */
262 { ".objc1_class_ext", "__class_ext",
263 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
264 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
265 { ".objc1_property_list", "__property",
266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
268 { ".objc1_protocol_ext", "__protocol_ext",
269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR,
270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0},
271 { NULL, NULL, 0, 0, 0, 0}
272 };
273
274 static const mach_o_segment_name_xlat segsec_names_xlat[] =
275 {
276 { "__TEXT", text_section_names_xlat },
277 { "__DATA", data_section_names_xlat },
278 { "__DWARF", dwarf_section_names_xlat },
279 { "__OBJC", objc_section_names_xlat },
280 { NULL, NULL }
281 };
282
283 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
284
285 /* For both cases bfd-name => mach-o name and vice versa, the specific target
286 is checked before the generic. This allows a target (e.g. ppc for cstring)
287 to override the generic definition with a more specific one. */
288
289 /* Fetch the translation from a Mach-O section designation (segment, section)
290 as a bfd short name, if one exists. Otherwise return NULL.
291
292 Allow the segment and section names to be unterminated 16 byte arrays. */
293
294 const mach_o_section_name_xlat *
295 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname,
296 const char *sectname)
297 {
298 const struct mach_o_segment_name_xlat *seg;
299 const mach_o_section_name_xlat *sec;
300 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
301
302 /* First try any target-specific translations defined... */
303 if (bed->segsec_names_xlat)
304 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
305 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
306 for (sec = seg->sections; sec->mach_o_name; sec++)
307 if (strncmp (sec->mach_o_name, sectname,
308 BFD_MACH_O_SECTNAME_SIZE) == 0)
309 return sec;
310
311 /* ... and then the Mach-O generic ones. */
312 for (seg = segsec_names_xlat; seg->segname; seg++)
313 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
314 for (sec = seg->sections; sec->mach_o_name; sec++)
315 if (strncmp (sec->mach_o_name, sectname,
316 BFD_MACH_O_SECTNAME_SIZE) == 0)
317 return sec;
318
319 return NULL;
320 }
321
322 /* If the bfd_name for this section is a 'canonical' form for which we
323 know the Mach-O data, return the segment name and the data for the
324 Mach-O equivalent. Otherwise return NULL. */
325
326 const mach_o_section_name_xlat *
327 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name,
328 const char **segname)
329 {
330 const struct mach_o_segment_name_xlat *seg;
331 const mach_o_section_name_xlat *sec;
332 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
333 *segname = NULL;
334
335 if (bfd_name[0] != '.')
336 return NULL;
337
338 /* First try any target-specific translations defined... */
339 if (bed->segsec_names_xlat)
340 for (seg = bed->segsec_names_xlat; seg->segname; seg++)
341 for (sec = seg->sections; sec->bfd_name; sec++)
342 if (strcmp (bfd_name, sec->bfd_name) == 0)
343 {
344 *segname = seg->segname;
345 return sec;
346 }
347
348 /* ... and then the Mach-O generic ones. */
349 for (seg = segsec_names_xlat; seg->segname; seg++)
350 for (sec = seg->sections; sec->bfd_name; sec++)
351 if (strcmp (bfd_name, sec->bfd_name) == 0)
352 {
353 *segname = seg->segname;
354 return sec;
355 }
356
357 return NULL;
358 }
359
360 /* Convert Mach-O section name to BFD.
361
362 Try to use standard/canonical names, for which we have tables including
363 default flag settings - which are returned. Otherwise forge a new name
364 in the form "<segmentname>.<sectionname>" this will be prefixed with
365 LC_SEGMENT. if the segment name does not begin with an underscore.
366
367 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL-
368 terminated if the name length is exactly 16 bytes - but must be if the name
369 length is less than 16 characters). */
370
371 void
372 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname,
373 const char *secname, const char **name,
374 flagword *flags)
375 {
376 const mach_o_section_name_xlat *xlat;
377 char *res;
378 unsigned int len;
379 const char *pfx = "";
380
381 *name = NULL;
382 *flags = SEC_NO_FLAGS;
383
384 /* First search for a canonical name...
385 xlat will be non-null if there is an entry for segname, secname. */
386 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname);
387 if (xlat)
388 {
389 len = strlen (xlat->bfd_name);
390 res = bfd_alloc (abfd, len+1);
391 if (res == NULL)
392 return;
393 memcpy (res, xlat->bfd_name, len+1);
394 *name = res;
395 *flags = xlat->bfd_flags;
396 return;
397 }
398
399 /* ... else we make up a bfd name from the segment concatenated with the
400 section. */
401
402 len = 16 + 1 + 16 + 1;
403
404 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start
405 with an underscore. */
406 if (segname[0] != '_')
407 {
408 static const char seg_pfx[] = "LC_SEGMENT.";
409
410 pfx = seg_pfx;
411 len += sizeof (seg_pfx) - 1;
412 }
413
414 res = bfd_alloc (abfd, len);
415 if (res == NULL)
416 return;
417 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname);
418 *name = res;
419 }
420
421 /* Convert a bfd section name to a Mach-O segment + section name.
422
423 If the name is a canonical one for which we have a Darwin match
424 return the translation table - which contains defaults for flags,
425 type, attribute and default alignment data.
426
427 Otherwise, expand the bfd_name (assumed to be in the form
428 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */
429
430 static const mach_o_section_name_xlat *
431 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED,
432 asection *sect,
433 bfd_mach_o_section *section)
434 {
435 const mach_o_section_name_xlat *xlat;
436 const char *name = bfd_get_section_name (abfd, sect);
437 const char *segname;
438 const char *dot;
439 unsigned int len;
440 unsigned int seglen;
441 unsigned int seclen;
442
443 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1);
444 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1);
445
446 /* See if is a canonical name ... */
447 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname);
448 if (xlat)
449 {
450 strcpy (section->segname, segname);
451 strcpy (section->sectname, xlat->mach_o_name);
452 return xlat;
453 }
454
455 /* .. else we convert our constructed one back to Mach-O.
456 Strip LC_SEGMENT. prefix, if present. */
457 if (strncmp (name, "LC_SEGMENT.", 11) == 0)
458 name += 11;
459
460 /* Find a dot. */
461 dot = strchr (name, '.');
462 len = strlen (name);
463
464 /* Try to split name into segment and section names. */
465 if (dot && dot != name)
466 {
467 seglen = dot - name;
468 seclen = len - (dot + 1 - name);
469
470 if (seglen <= BFD_MACH_O_SEGNAME_SIZE
471 && seclen <= BFD_MACH_O_SECTNAME_SIZE)
472 {
473 memcpy (section->segname, name, seglen);
474 section->segname[seglen] = 0;
475 memcpy (section->sectname, dot + 1, seclen);
476 section->sectname[seclen] = 0;
477 return NULL;
478 }
479 }
480
481 /* The segment and section names are both missing - don't make them
482 into dots. */
483 if (dot && dot == name)
484 return NULL;
485
486 /* Just duplicate the name into both segment and section. */
487 if (len > 16)
488 len = 16;
489 memcpy (section->segname, name, len);
490 section->segname[len] = 0;
491 memcpy (section->sectname, name, len);
492 section->sectname[len] = 0;
493 return NULL;
494 }
495
496 /* Return the size of an entry for section SEC.
497 Must be called only for symbol pointer section and symbol stubs
498 sections. */
499
500 unsigned int
501 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec)
502 {
503 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
504 {
505 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
506 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
507 return bfd_mach_o_wide_p (abfd) ? 8 : 4;
508 case BFD_MACH_O_S_SYMBOL_STUBS:
509 return sec->reserved2;
510 default:
511 BFD_FAIL ();
512 return 0;
513 }
514 }
515
516 /* Return the number of indirect symbols for a section.
517 Must be called only for symbol pointer section and symbol stubs
518 sections. */
519
520 unsigned int
521 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec)
522 {
523 unsigned int elsz;
524
525 elsz = bfd_mach_o_section_get_entry_size (abfd, sec);
526 if (elsz == 0)
527 return 0;
528 else
529 return sec->size / elsz;
530 }
531
532
533 /* Copy any private info we understand from the input symbol
534 to the output symbol. */
535
536 bfd_boolean
537 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
538 asymbol *isymbol,
539 bfd *obfd ATTRIBUTE_UNUSED,
540 asymbol *osymbol)
541 {
542 bfd_mach_o_asymbol *os, *is;
543 os = (bfd_mach_o_asymbol *)osymbol;
544 is = (bfd_mach_o_asymbol *)isymbol;
545 os->n_type = is->n_type;
546 os->n_sect = is->n_sect;
547 os->n_desc = is->n_desc;
548 os->symbol.udata.i = is->symbol.udata.i;
549 return TRUE;
550 }
551
552 /* Copy any private info we understand from the input section
553 to the output section. */
554
555 bfd_boolean
556 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
557 asection *isection,
558 bfd *obfd ATTRIBUTE_UNUSED,
559 asection *osection)
560 {
561 if (osection->used_by_bfd == NULL)
562 osection->used_by_bfd = isection->used_by_bfd;
563 else
564 if (isection->used_by_bfd != NULL)
565 memcpy (osection->used_by_bfd, isection->used_by_bfd,
566 sizeof (bfd_mach_o_section));
567
568 if (osection->used_by_bfd != NULL)
569 ((bfd_mach_o_section *)osection->used_by_bfd)->bfdsection = osection;
570
571 return TRUE;
572 }
573
574 /* Copy any private info we understand from the input bfd
575 to the output bfd. */
576
577 bfd_boolean
578 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd)
579 {
580 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour
581 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour)
582 return TRUE;
583
584 BFD_ASSERT (bfd_mach_o_valid (ibfd));
585 BFD_ASSERT (bfd_mach_o_valid (obfd));
586
587 /* FIXME: copy commands. */
588
589 return TRUE;
590 }
591
592 /* This allows us to set up to 32 bits of flags (unless we invent some
593 fiendish scheme to subdivide). For now, we'll just set the file flags
594 without error checking - just overwrite. */
595
596 bfd_boolean
597 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags)
598 {
599 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
600
601 if (!mdata)
602 return FALSE;
603
604 mdata->header.flags = flags;
605 return TRUE;
606 }
607
608 /* Count the total number of symbols. */
609
610 static long
611 bfd_mach_o_count_symbols (bfd *abfd)
612 {
613 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
614
615 if (mdata->symtab == NULL)
616 return 0;
617 return mdata->symtab->nsyms;
618 }
619
620 long
621 bfd_mach_o_get_symtab_upper_bound (bfd *abfd)
622 {
623 long nsyms = bfd_mach_o_count_symbols (abfd);
624
625 return ((nsyms + 1) * sizeof (asymbol *));
626 }
627
628 long
629 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
630 {
631 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
632 long nsyms = bfd_mach_o_count_symbols (abfd);
633 bfd_mach_o_symtab_command *sym = mdata->symtab;
634 unsigned long j;
635
636 if (nsyms < 0)
637 return nsyms;
638
639 if (nsyms == 0)
640 {
641 /* Do not try to read symbols if there are none. */
642 alocation[0] = NULL;
643 return 0;
644 }
645
646 if (!bfd_mach_o_read_symtab_symbols (abfd))
647 {
648 (*_bfd_error_handler)
649 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols"));
650 return 0;
651 }
652
653 BFD_ASSERT (sym->symbols != NULL);
654
655 for (j = 0; j < sym->nsyms; j++)
656 alocation[j] = &sym->symbols[j].symbol;
657
658 alocation[j] = NULL;
659
660 return nsyms;
661 }
662
663 /* Create synthetic symbols for indirect symbols. */
664
665 long
666 bfd_mach_o_get_synthetic_symtab (bfd *abfd,
667 long symcount ATTRIBUTE_UNUSED,
668 asymbol **syms ATTRIBUTE_UNUSED,
669 long dynsymcount ATTRIBUTE_UNUSED,
670 asymbol **dynsyms ATTRIBUTE_UNUSED,
671 asymbol **ret)
672 {
673 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
674 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
675 bfd_mach_o_symtab_command *symtab = mdata->symtab;
676 asymbol *s;
677 unsigned long count, i, j, n;
678 size_t size;
679 char *names;
680 char *nul_name;
681
682 *ret = NULL;
683
684 /* Stop now if no symbols or no indirect symbols. */
685 if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
686 return 0;
687
688 if (dysymtab->nindirectsyms == 0)
689 return 0;
690
691 /* We need to allocate a bfd symbol for every indirect symbol and to
692 allocate the memory for its name. */
693 count = dysymtab->nindirectsyms;
694 size = count * sizeof (asymbol) + 1;
695
696 for (j = 0; j < count; j++)
697 {
698 unsigned int isym = dysymtab->indirect_syms[j];
699
700 /* Some indirect symbols are anonymous. */
701 if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
702 size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
703 }
704
705 s = *ret = (asymbol *) bfd_malloc (size);
706 if (s == NULL)
707 return -1;
708 names = (char *) (s + count);
709 nul_name = names;
710 *names++ = 0;
711
712 n = 0;
713 for (i = 0; i < mdata->nsects; i++)
714 {
715 bfd_mach_o_section *sec = mdata->sections[i];
716 unsigned int first, last;
717 bfd_vma addr;
718 bfd_vma entry_size;
719
720 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
721 {
722 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
723 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
724 case BFD_MACH_O_S_SYMBOL_STUBS:
725 /* Only these sections have indirect symbols. */
726 first = sec->reserved1;
727 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
728 addr = sec->addr;
729 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec);
730 for (j = first; j < last; j++)
731 {
732 unsigned int isym = dysymtab->indirect_syms[j];
733
734 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
735 s->section = sec->bfdsection;
736 s->value = addr - sec->addr;
737 s->udata.p = NULL;
738
739 if (isym < symtab->nsyms
740 && symtab->symbols[isym].symbol.name)
741 {
742 const char *sym = symtab->symbols[isym].symbol.name;
743 size_t len;
744
745 s->name = names;
746 len = strlen (sym);
747 memcpy (names, sym, len);
748 names += len;
749 memcpy (names, "$stub", sizeof ("$stub"));
750 names += sizeof ("$stub");
751 }
752 else
753 s->name = nul_name;
754
755 addr += entry_size;
756 s++;
757 n++;
758 }
759 break;
760 default:
761 break;
762 }
763 }
764
765 return n;
766 }
767
768 void
769 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
770 asymbol *symbol,
771 symbol_info *ret)
772 {
773 bfd_symbol_info (symbol, ret);
774 }
775
776 void
777 bfd_mach_o_print_symbol (bfd *abfd,
778 void * afile,
779 asymbol *symbol,
780 bfd_print_symbol_type how)
781 {
782 FILE *file = (FILE *) afile;
783 const char *name;
784 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
785
786 switch (how)
787 {
788 case bfd_print_symbol_name:
789 fprintf (file, "%s", symbol->name);
790 break;
791 default:
792 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
793 if (asym->n_type & BFD_MACH_O_N_STAB)
794 name = bfd_get_stab_name (asym->n_type);
795 else
796 switch (asym->n_type & BFD_MACH_O_N_TYPE)
797 {
798 case BFD_MACH_O_N_UNDF:
799 if (symbol->value == 0)
800 name = "UND";
801 else
802 name = "COM";
803 break;
804 case BFD_MACH_O_N_ABS:
805 name = "ABS";
806 break;
807 case BFD_MACH_O_N_INDR:
808 name = "INDR";
809 break;
810 case BFD_MACH_O_N_PBUD:
811 name = "PBUD";
812 break;
813 case BFD_MACH_O_N_SECT:
814 name = "SECT";
815 break;
816 default:
817 name = "???";
818 break;
819 }
820 if (name == NULL)
821 name = "";
822 fprintf (file, " %02x %-6s %02x %04x",
823 asym->n_type, name, asym->n_sect, asym->n_desc);
824 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
825 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
826 fprintf (file, " [%s]", symbol->section->name);
827 fprintf (file, " %s", symbol->name);
828 }
829 }
830
831 static void
832 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
833 bfd_mach_o_cpu_subtype msubtype,
834 enum bfd_architecture *type,
835 unsigned long *subtype)
836 {
837 *subtype = bfd_arch_unknown;
838
839 switch (mtype)
840 {
841 case BFD_MACH_O_CPU_TYPE_VAX:
842 *type = bfd_arch_vax;
843 break;
844 case BFD_MACH_O_CPU_TYPE_MC680x0:
845 *type = bfd_arch_m68k;
846 break;
847 case BFD_MACH_O_CPU_TYPE_I386:
848 *type = bfd_arch_i386;
849 *subtype = bfd_mach_i386_i386;
850 break;
851 case BFD_MACH_O_CPU_TYPE_X86_64:
852 *type = bfd_arch_i386;
853 *subtype = bfd_mach_x86_64;
854 break;
855 case BFD_MACH_O_CPU_TYPE_MIPS:
856 *type = bfd_arch_mips;
857 break;
858 case BFD_MACH_O_CPU_TYPE_MC98000:
859 *type = bfd_arch_m98k;
860 break;
861 case BFD_MACH_O_CPU_TYPE_HPPA:
862 *type = bfd_arch_hppa;
863 break;
864 case BFD_MACH_O_CPU_TYPE_ARM:
865 *type = bfd_arch_arm;
866 switch (msubtype)
867 {
868 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
869 *subtype = bfd_mach_arm_4T;
870 break;
871 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
872 *subtype = bfd_mach_arm_4T; /* Best fit ? */
873 break;
874 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
875 *subtype = bfd_mach_arm_5TE;
876 break;
877 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
878 *subtype = bfd_mach_arm_XScale;
879 break;
880 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
881 *subtype = bfd_mach_arm_5TE; /* Best fit ? */
882 break;
883 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
884 default:
885 break;
886 }
887 break;
888 case BFD_MACH_O_CPU_TYPE_MC88000:
889 *type = bfd_arch_m88k;
890 break;
891 case BFD_MACH_O_CPU_TYPE_SPARC:
892 *type = bfd_arch_sparc;
893 *subtype = bfd_mach_sparc;
894 break;
895 case BFD_MACH_O_CPU_TYPE_I860:
896 *type = bfd_arch_i860;
897 break;
898 case BFD_MACH_O_CPU_TYPE_ALPHA:
899 *type = bfd_arch_alpha;
900 break;
901 case BFD_MACH_O_CPU_TYPE_POWERPC:
902 *type = bfd_arch_powerpc;
903 *subtype = bfd_mach_ppc;
904 break;
905 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
906 *type = bfd_arch_powerpc;
907 *subtype = bfd_mach_ppc64;
908 break;
909 case BFD_MACH_O_CPU_TYPE_ARM64:
910 *type = bfd_arch_aarch64;
911 *subtype = bfd_mach_aarch64;
912 break;
913 default:
914 *type = bfd_arch_unknown;
915 break;
916 }
917 }
918
919 static bfd_boolean
920 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)
921 {
922 struct mach_o_header_external raw;
923 unsigned int size;
924
925 size = mach_o_wide_p (header) ?
926 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
927
928 bfd_h_put_32 (abfd, header->magic, raw.magic);
929 bfd_h_put_32 (abfd, header->cputype, raw.cputype);
930 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype);
931 bfd_h_put_32 (abfd, header->filetype, raw.filetype);
932 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds);
933 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds);
934 bfd_h_put_32 (abfd, header->flags, raw.flags);
935
936 if (mach_o_wide_p (header))
937 bfd_h_put_32 (abfd, header->reserved, raw.reserved);
938
939 if (bfd_seek (abfd, 0, SEEK_SET) != 0
940 || bfd_bwrite (&raw, size, abfd) != size)
941 return FALSE;
942
943 return TRUE;
944 }
945
946 static bfd_boolean
947 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
948 {
949 bfd_mach_o_thread_command *cmd = &command->command.thread;
950 unsigned int i;
951 struct mach_o_thread_command_external raw;
952 unsigned int offset;
953
954 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
955 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
956
957 offset = 8;
958 for (i = 0; i < cmd->nflavours; i++)
959 {
960 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
961 BFD_ASSERT (cmd->flavours[i].offset ==
962 (command->offset + offset + BFD_MACH_O_LC_SIZE));
963
964 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour);
965 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count);
966
967 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
968 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
969 return FALSE;
970
971 offset += cmd->flavours[i].size + sizeof (raw);
972 }
973
974 return TRUE;
975 }
976
977 long
978 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
979 asection *asect)
980 {
981 return (asect->reloc_count + 1) * sizeof (arelent *);
982 }
983
984 /* In addition to the need to byte-swap the symbol number, the bit positions
985 of the fields in the relocation information vary per target endian-ness. */
986
987 static void
988 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
989 unsigned char *fields)
990 {
991 unsigned char info = fields[3];
992
993 if (bfd_big_endian (abfd))
994 {
995 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
996 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
997 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
998 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
999 & BFD_MACH_O_LENGTH_MASK;
1000 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
1001 }
1002 else
1003 {
1004 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
1005 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
1006 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
1007 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
1008 & BFD_MACH_O_LENGTH_MASK;
1009 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
1010 }
1011 }
1012
1013 static int
1014 bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
1015 struct mach_o_reloc_info_external *raw,
1016 arelent *res, asymbol **syms)
1017 {
1018 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1019 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1020 bfd_mach_o_reloc_info reloc;
1021 bfd_vma addr;
1022 asymbol **sym;
1023
1024 addr = bfd_get_32 (abfd, raw->r_address);
1025 res->sym_ptr_ptr = NULL;
1026 res->addend = 0;
1027
1028 if (addr & BFD_MACH_O_SR_SCATTERED)
1029 {
1030 unsigned int j;
1031 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
1032
1033 /* Scattered relocation, can't be extern. */
1034 reloc.r_scattered = 1;
1035 reloc.r_extern = 0;
1036
1037 /* Extract section and offset from r_value (symnum). */
1038 reloc.r_value = symnum;
1039 /* FIXME: This breaks when a symbol in a reloc exactly follows the
1040 end of the data for the section (e.g. in a calculation of section
1041 data length). At present, the symbol will end up associated with
1042 the following section or, if it falls within alignment padding, as
1043 null - which will assert later. */
1044 for (j = 0; j < mdata->nsects; j++)
1045 {
1046 bfd_mach_o_section *sect = mdata->sections[j];
1047 if (symnum >= sect->addr && symnum < sect->addr + sect->size)
1048 {
1049 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
1050 res->addend = symnum - sect->addr;
1051 break;
1052 }
1053 }
1054
1055 /* Extract the info and address fields from r_address. */
1056 reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
1057 reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
1058 reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
1059 reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
1060 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
1061 }
1062 else
1063 {
1064 unsigned int num;
1065
1066 /* Non-scattered relocation. */
1067 reloc.r_scattered = 0;
1068
1069 /* The value and info fields have to be extracted dependent on target
1070 endian-ness. */
1071 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
1072 num = reloc.r_value;
1073
1074 if (reloc.r_extern)
1075 {
1076 /* An external symbol number. */
1077 sym = syms + num;
1078 }
1079 else if (num == 0x00ffffff || num == 0)
1080 {
1081 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
1082 is generic code, we don't know wether this is really a PAIR.
1083 This value is almost certainly not a valid section number, hence
1084 this specific case to avoid an assertion failure.
1085 Target specific swap_reloc_in routine should adjust that. */
1086 sym = bfd_abs_section_ptr->symbol_ptr_ptr;
1087 }
1088 else
1089 {
1090 /* A section number. */
1091 BFD_ASSERT (num <= mdata->nsects);
1092
1093 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
1094 /* For a symbol defined in section S, the addend (stored in the
1095 binary) contains the address of the section. To comply with
1096 bfd convention, subtract the section address.
1097 Use the address from the header, so that the user can modify
1098 the vma of the section. */
1099 res->addend = -mdata->sections[num - 1]->addr;
1100 }
1101 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
1102 in the lower 16bits of the address value. So we have to find the
1103 'symbol' from the preceding reloc. We do this even though the
1104 section symbol is probably not needed here, because NULL symbol
1105 values cause an assert in generic BFD code. This must be done in
1106 the PPC swap_reloc_in routine. */
1107 res->sym_ptr_ptr = sym;
1108
1109 /* The 'address' is just r_address.
1110 ??? maybe this should be masked with 0xffffff for safety. */
1111 res->address = addr;
1112 reloc.r_address = addr;
1113 }
1114
1115 /* We have set up a reloc with all the information present, so the swapper
1116 can modify address, value and addend fields, if necessary, to convey
1117 information in the generic BFD reloc that is mach-o specific. */
1118
1119 if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
1120 return -1;
1121 return 0;
1122 }
1123
1124 static int
1125 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos,
1126 unsigned long count,
1127 arelent *res, asymbol **syms)
1128 {
1129 unsigned long i;
1130 struct mach_o_reloc_info_external *native_relocs;
1131 bfd_size_type native_size;
1132
1133 /* Allocate and read relocs. */
1134 native_size = count * BFD_MACH_O_RELENT_SIZE;
1135 native_relocs =
1136 (struct mach_o_reloc_info_external *) bfd_malloc (native_size);
1137 if (native_relocs == NULL)
1138 return -1;
1139
1140 if (bfd_seek (abfd, filepos, SEEK_SET) != 0
1141 || bfd_bread (native_relocs, native_size, abfd) != native_size)
1142 goto err;
1143
1144 for (i = 0; i < count; i++)
1145 {
1146 if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i],
1147 &res[i], syms) < 0)
1148 goto err;
1149 }
1150 free (native_relocs);
1151 return i;
1152 err:
1153 free (native_relocs);
1154 return -1;
1155 }
1156
1157 long
1158 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
1159 arelent **rels, asymbol **syms)
1160 {
1161 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1162 unsigned long i;
1163 arelent *res;
1164
1165 if (asect->reloc_count == 0)
1166 return 0;
1167
1168 /* No need to go further if we don't know how to read relocs. */
1169 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1170 return 0;
1171
1172 if (asect->relocation == NULL)
1173 {
1174 res = bfd_malloc (asect->reloc_count * sizeof (arelent));
1175 if (res == NULL)
1176 return -1;
1177
1178 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos,
1179 asect->reloc_count, res, syms) < 0)
1180 {
1181 free (res);
1182 return -1;
1183 }
1184 asect->relocation = res;
1185 }
1186
1187 res = asect->relocation;
1188 for (i = 0; i < asect->reloc_count; i++)
1189 rels[i] = &res[i];
1190 rels[i] = NULL;
1191
1192 return i;
1193 }
1194
1195 long
1196 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd)
1197 {
1198 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1199
1200 if (mdata->dysymtab == NULL)
1201 return 1;
1202 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1)
1203 * sizeof (arelent *);
1204 }
1205
1206 long
1207 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels,
1208 struct bfd_symbol **syms)
1209 {
1210 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1211 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab;
1212 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1213 unsigned long i;
1214 arelent *res;
1215
1216 if (dysymtab == NULL)
1217 return 0;
1218 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0)
1219 return 0;
1220
1221 /* No need to go further if we don't know how to read relocs. */
1222 if (bed->_bfd_mach_o_swap_reloc_in == NULL)
1223 return 0;
1224
1225 if (mdata->dyn_reloc_cache == NULL)
1226 {
1227 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel)
1228 * sizeof (arelent));
1229 if (res == NULL)
1230 return -1;
1231
1232 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff,
1233 dysymtab->nextrel, res, syms) < 0)
1234 {
1235 free (res);
1236 return -1;
1237 }
1238
1239 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff,
1240 dysymtab->nlocrel,
1241 res + dysymtab->nextrel, syms) < 0)
1242 {
1243 free (res);
1244 return -1;
1245 }
1246
1247 mdata->dyn_reloc_cache = res;
1248 }
1249
1250 res = mdata->dyn_reloc_cache;
1251 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++)
1252 rels[i] = &res[i];
1253 rels[i] = NULL;
1254 return i;
1255 }
1256
1257 /* In addition to the need to byte-swap the symbol number, the bit positions
1258 of the fields in the relocation information vary per target endian-ness. */
1259
1260 static void
1261 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
1262 bfd_mach_o_reloc_info *rel)
1263 {
1264 unsigned char info = 0;
1265
1266 BFD_ASSERT (rel->r_type <= 15);
1267 BFD_ASSERT (rel->r_length <= 3);
1268
1269 if (bfd_big_endian (abfd))
1270 {
1271 fields[0] = (rel->r_value >> 16) & 0xff;
1272 fields[1] = (rel->r_value >> 8) & 0xff;
1273 fields[2] = rel->r_value & 0xff;
1274 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
1275 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
1276 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
1277 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
1278 }
1279 else
1280 {
1281 fields[2] = (rel->r_value >> 16) & 0xff;
1282 fields[1] = (rel->r_value >> 8) & 0xff;
1283 fields[0] = rel->r_value & 0xff;
1284 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
1285 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
1286 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
1287 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
1288 }
1289 fields[3] = info;
1290 }
1291
1292 static bfd_boolean
1293 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
1294 {
1295 unsigned int i;
1296 arelent **entries;
1297 asection *sec;
1298 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
1299
1300 sec = section->bfdsection;
1301 if (sec->reloc_count == 0)
1302 return TRUE;
1303
1304 if (bed->_bfd_mach_o_swap_reloc_out == NULL)
1305 return TRUE;
1306
1307 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
1308 return FALSE;
1309
1310 /* Convert and write. */
1311 entries = section->bfdsection->orelocation;
1312 for (i = 0; i < section->nreloc; i++)
1313 {
1314 arelent *rel = entries[i];
1315 struct mach_o_reloc_info_external raw;
1316 bfd_mach_o_reloc_info info, *pinfo = &info;
1317
1318 /* Convert relocation to an intermediate representation. */
1319 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
1320 return FALSE;
1321
1322 /* Lower the relocation info. */
1323 if (pinfo->r_scattered)
1324 {
1325 unsigned long v;
1326
1327 v = BFD_MACH_O_SR_SCATTERED
1328 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
1329 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length)
1330 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type)
1331 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address);
1332 /* Note: scattered relocs have field in reverse order... */
1333 bfd_put_32 (abfd, v, raw.r_address);
1334 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum);
1335 }
1336 else
1337 {
1338 bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
1339 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
1340 pinfo);
1341 }
1342
1343 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
1344 != BFD_MACH_O_RELENT_SIZE)
1345 return FALSE;
1346 }
1347 return TRUE;
1348 }
1349
1350 static bfd_boolean
1351 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
1352 {
1353 struct mach_o_section_32_external raw;
1354
1355 memcpy (raw.sectname, section->sectname, 16);
1356 memcpy (raw.segname, section->segname, 16);
1357 bfd_h_put_32 (abfd, section->addr, raw.addr);
1358 bfd_h_put_32 (abfd, section->size, raw.size);
1359 bfd_h_put_32 (abfd, section->offset, raw.offset);
1360 bfd_h_put_32 (abfd, section->align, raw.align);
1361 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1362 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1363 bfd_h_put_32 (abfd, section->flags, raw.flags);
1364 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1365 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1366
1367 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
1368 != BFD_MACH_O_SECTION_SIZE)
1369 return FALSE;
1370
1371 return TRUE;
1372 }
1373
1374 static bfd_boolean
1375 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
1376 {
1377 struct mach_o_section_64_external raw;
1378
1379 memcpy (raw.sectname, section->sectname, 16);
1380 memcpy (raw.segname, section->segname, 16);
1381 bfd_h_put_64 (abfd, section->addr, raw.addr);
1382 bfd_h_put_64 (abfd, section->size, raw.size);
1383 bfd_h_put_32 (abfd, section->offset, raw.offset);
1384 bfd_h_put_32 (abfd, section->align, raw.align);
1385 bfd_h_put_32 (abfd, section->reloff, raw.reloff);
1386 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc);
1387 bfd_h_put_32 (abfd, section->flags, raw.flags);
1388 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1);
1389 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2);
1390 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3);
1391
1392 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
1393 != BFD_MACH_O_SECTION_64_SIZE)
1394 return FALSE;
1395
1396 return TRUE;
1397 }
1398
1399 static bfd_boolean
1400 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
1401 {
1402 struct mach_o_segment_command_32_external raw;
1403 bfd_mach_o_segment_command *seg = &command->command.segment;
1404 bfd_mach_o_section *sec;
1405
1406 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
1407
1408 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1409 if (!bfd_mach_o_write_relocs (abfd, sec))
1410 return FALSE;
1411
1412 memcpy (raw.segname, seg->segname, 16);
1413 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr);
1414 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize);
1415 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff);
1416 bfd_h_put_32 (abfd, seg->filesize, raw.filesize);
1417 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1418 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1419 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1420 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1421
1422 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1423 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1424 return FALSE;
1425
1426 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1427 if (!bfd_mach_o_write_section_32 (abfd, sec))
1428 return FALSE;
1429
1430 return TRUE;
1431 }
1432
1433 static bfd_boolean
1434 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
1435 {
1436 struct mach_o_segment_command_64_external raw;
1437 bfd_mach_o_segment_command *seg = &command->command.segment;
1438 bfd_mach_o_section *sec;
1439
1440 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
1441
1442 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1443 if (!bfd_mach_o_write_relocs (abfd, sec))
1444 return FALSE;
1445
1446 memcpy (raw.segname, seg->segname, 16);
1447 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr);
1448 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize);
1449 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff);
1450 bfd_h_put_64 (abfd, seg->filesize, raw.filesize);
1451 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot);
1452 bfd_h_put_32 (abfd, seg->initprot, raw.initprot);
1453 bfd_h_put_32 (abfd, seg->nsects, raw.nsects);
1454 bfd_h_put_32 (abfd, seg->flags, raw.flags);
1455
1456 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1457 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1458 return FALSE;
1459
1460 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
1461 if (!bfd_mach_o_write_section_64 (abfd, sec))
1462 return FALSE;
1463
1464 return TRUE;
1465 }
1466
1467 static bfd_boolean
1468 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
1469 {
1470 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1471 bfd_mach_o_symtab_command *sym = &command->command.symtab;
1472 unsigned long i;
1473 unsigned int wide = bfd_mach_o_wide_p (abfd);
1474 unsigned int symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
1475 struct bfd_strtab_hash *strtab;
1476 asymbol **symbols = bfd_get_outsymbols (abfd);
1477
1478 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
1479
1480 /* Write the symbols first. */
1481 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2);
1482 sym->symoff = mdata->filelen;
1483 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
1484 return FALSE;
1485
1486 sym->nsyms = bfd_get_symcount (abfd);
1487 mdata->filelen += sym->nsyms * symlen;
1488
1489 strtab = _bfd_stringtab_init ();
1490 if (strtab == NULL)
1491 return FALSE;
1492
1493 if (sym->nsyms > 0)
1494 /* Although we don't strictly need to do this, for compatibility with
1495 Darwin system tools, actually output an empty string for the index
1496 0 entry. */
1497 _bfd_stringtab_add (strtab, "", TRUE, FALSE);
1498
1499 for (i = 0; i < sym->nsyms; i++)
1500 {
1501 bfd_size_type str_index;
1502 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1503
1504 if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
1505 /* An index of 0 always means the empty string. */
1506 str_index = 0;
1507 else
1508 {
1509 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
1510
1511 if (str_index == (bfd_size_type) -1)
1512 goto err;
1513 }
1514
1515 if (wide)
1516 {
1517 struct mach_o_nlist_64_external raw;
1518
1519 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1520 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1521 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1522 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1523 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value,
1524 raw.n_value);
1525
1526 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1527 goto err;
1528 }
1529 else
1530 {
1531 struct mach_o_nlist_external raw;
1532
1533 bfd_h_put_32 (abfd, str_index, raw.n_strx);
1534 bfd_h_put_8 (abfd, s->n_type, raw.n_type);
1535 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect);
1536 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc);
1537 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value,
1538 raw.n_value);
1539
1540 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1541 goto err;
1542 }
1543 }
1544 sym->strsize = _bfd_stringtab_size (strtab);
1545 sym->stroff = mdata->filelen;
1546 mdata->filelen += sym->strsize;
1547
1548 if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
1549 goto err;
1550 _bfd_stringtab_free (strtab);
1551
1552 /* The command. */
1553 {
1554 struct mach_o_symtab_command_external raw;
1555
1556 bfd_h_put_32 (abfd, sym->symoff, raw.symoff);
1557 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms);
1558 bfd_h_put_32 (abfd, sym->stroff, raw.stroff);
1559 bfd_h_put_32 (abfd, sym->strsize, raw.strsize);
1560
1561 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
1562 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1563 return FALSE;
1564 }
1565
1566 return TRUE;
1567
1568 err:
1569 _bfd_stringtab_free (strtab);
1570 return FALSE;
1571 }
1572
1573 /* Write a dysymtab command.
1574 TODO: Possibly coalesce writes of smaller objects. */
1575
1576 static bfd_boolean
1577 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
1578 {
1579 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
1580
1581 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
1582
1583 if (cmd->nmodtab != 0)
1584 {
1585 unsigned int i;
1586
1587 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
1588 return FALSE;
1589
1590 for (i = 0; i < cmd->nmodtab; i++)
1591 {
1592 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
1593 unsigned int iinit;
1594 unsigned int ninit;
1595
1596 iinit = module->iinit & 0xffff;
1597 iinit |= ((module->iterm & 0xffff) << 16);
1598
1599 ninit = module->ninit & 0xffff;
1600 ninit |= ((module->nterm & 0xffff) << 16);
1601
1602 if (bfd_mach_o_wide_p (abfd))
1603 {
1604 struct mach_o_dylib_module_64_external w;
1605
1606 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
1607 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
1608 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
1609 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
1610 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
1611 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
1612 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
1613 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
1614 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
1615 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
1616 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
1617 bfd_h_put_64 (abfd, module->objc_module_info_addr,
1618 &w.objc_module_info_addr);
1619 bfd_h_put_32 (abfd, module->objc_module_info_size,
1620 &w.objc_module_info_size);
1621
1622 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
1623 return FALSE;
1624 }
1625 else
1626 {
1627 struct mach_o_dylib_module_external n;
1628
1629 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
1630 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
1631 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
1632 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
1633 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
1634 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
1635 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
1636 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
1637 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
1638 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
1639 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
1640 bfd_h_put_32 (abfd, module->objc_module_info_addr,
1641 &n.objc_module_info_addr);
1642 bfd_h_put_32 (abfd, module->objc_module_info_size,
1643 &n.objc_module_info_size);
1644
1645 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
1646 return FALSE;
1647 }
1648 }
1649 }
1650
1651 if (cmd->ntoc != 0)
1652 {
1653 unsigned int i;
1654
1655 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
1656 return FALSE;
1657
1658 for (i = 0; i < cmd->ntoc; i++)
1659 {
1660 struct mach_o_dylib_table_of_contents_external raw;
1661 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
1662
1663 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
1664 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
1665
1666 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1667 return FALSE;
1668 }
1669 }
1670
1671 if (cmd->nindirectsyms > 0)
1672 {
1673 unsigned int i;
1674
1675 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
1676 return FALSE;
1677
1678 for (i = 0; i < cmd->nindirectsyms; ++i)
1679 {
1680 unsigned char raw[4];
1681
1682 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
1683 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1684 return FALSE;
1685 }
1686 }
1687
1688 if (cmd->nextrefsyms != 0)
1689 {
1690 unsigned int i;
1691
1692 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
1693 return FALSE;
1694
1695 for (i = 0; i < cmd->nextrefsyms; i++)
1696 {
1697 unsigned long v;
1698 unsigned char raw[4];
1699 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
1700
1701 /* Fields isym and flags are written as bit-fields, thus we need
1702 a specific processing for endianness. */
1703
1704 if (bfd_big_endian (abfd))
1705 {
1706 v = ((ref->isym & 0xffffff) << 8);
1707 v |= ref->flags & 0xff;
1708 }
1709 else
1710 {
1711 v = ref->isym & 0xffffff;
1712 v |= ((ref->flags & 0xff) << 24);
1713 }
1714
1715 bfd_h_put_32 (abfd, v, raw);
1716 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
1717 return FALSE;
1718 }
1719 }
1720
1721 /* The command. */
1722 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
1723 return FALSE;
1724 else
1725 {
1726 struct mach_o_dysymtab_command_external raw;
1727
1728 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
1729 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
1730 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
1731 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
1732 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
1733 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
1734 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
1735 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
1736 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
1737 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
1738 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
1739 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
1740 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
1741 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
1742 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
1743 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
1744 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
1745 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
1746
1747 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
1748 return FALSE;
1749 }
1750
1751 return TRUE;
1752 }
1753
1754 static unsigned
1755 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
1756 {
1757 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
1758
1759 /* Just leave debug symbols where they are (pretend they are local, and
1760 then they will just be sorted on position). */
1761 if (s->n_type & BFD_MACH_O_N_STAB)
1762 return 0;
1763
1764 /* Local (we should never see an undefined local AFAICT). */
1765 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
1766 return 0;
1767
1768 /* Common symbols look like undefined externs. */
1769 if (mtyp == BFD_MACH_O_N_UNDF)
1770 return 2;
1771
1772 /* A defined non-local, non-debug symbol. */
1773 return 1;
1774 }
1775
1776 static int
1777 bfd_mach_o_cf_symbols (const void *a, const void *b)
1778 {
1779 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
1780 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
1781 unsigned int soa, sob;
1782
1783 soa = bfd_mach_o_primary_symbol_sort_key (sa);
1784 sob = bfd_mach_o_primary_symbol_sort_key (sb);
1785 if (soa < sob)
1786 return -1;
1787
1788 if (soa > sob)
1789 return 1;
1790
1791 /* If it's local or stab, just preserve the input order. */
1792 if (soa == 0)
1793 {
1794 if (sa->symbol.udata.i < sb->symbol.udata.i)
1795 return -1;
1796 if (sa->symbol.udata.i > sb->symbol.udata.i)
1797 return 1;
1798
1799 /* This is probably an error. */
1800 return 0;
1801 }
1802
1803 /* The second sort key is name. */
1804 return strcmp (sa->symbol.name, sb->symbol.name);
1805 }
1806
1807 /* Process the symbols.
1808
1809 This should be OK for single-module files - but it is not likely to work
1810 for multi-module shared libraries.
1811
1812 (a) If the application has not filled in the relevant mach-o fields, make
1813 an estimate.
1814
1815 (b) Order them, like this:
1816 ( i) local.
1817 (unsorted)
1818 ( ii) external defined
1819 (by name)
1820 (iii) external undefined/common
1821 (by name)
1822 ( iv) common
1823 (by name)
1824 */
1825
1826 static bfd_boolean
1827 bfd_mach_o_mangle_symbols (bfd *abfd)
1828 {
1829 unsigned long i;
1830 asymbol **symbols = bfd_get_outsymbols (abfd);
1831
1832 if (symbols == NULL || bfd_get_symcount (abfd) == 0)
1833 return TRUE;
1834
1835 for (i = 0; i < bfd_get_symcount (abfd); i++)
1836 {
1837 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1838
1839 /* We use this value, which is out-of-range as a symbol index, to signal
1840 that the mach-o-specific data are not filled in and need to be created
1841 from the bfd values. It is much preferable for the application to do
1842 this, since more meaningful diagnostics can be made that way. */
1843
1844 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
1845 {
1846 /* No symbol information has been set - therefore determine
1847 it from the bfd symbol flags/info. */
1848 if (s->symbol.section == bfd_abs_section_ptr)
1849 s->n_type = BFD_MACH_O_N_ABS;
1850 else if (s->symbol.section == bfd_und_section_ptr)
1851 {
1852 s->n_type = BFD_MACH_O_N_UNDF;
1853 if (s->symbol.flags & BSF_WEAK)
1854 s->n_desc |= BFD_MACH_O_N_WEAK_REF;
1855 /* mach-o automatically makes undefined symbols extern. */
1856 s->n_type |= BFD_MACH_O_N_EXT;
1857 s->symbol.flags |= BSF_GLOBAL;
1858 }
1859 else if (s->symbol.section == bfd_com_section_ptr)
1860 {
1861 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
1862 s->symbol.flags |= BSF_GLOBAL;
1863 }
1864 else
1865 s->n_type = BFD_MACH_O_N_SECT;
1866
1867 if (s->symbol.flags & BSF_GLOBAL)
1868 s->n_type |= BFD_MACH_O_N_EXT;
1869 }
1870
1871 /* Put the section index in, where required. */
1872 if ((s->symbol.section != bfd_abs_section_ptr
1873 && s->symbol.section != bfd_und_section_ptr
1874 && s->symbol.section != bfd_com_section_ptr)
1875 || ((s->n_type & BFD_MACH_O_N_STAB) != 0
1876 && s->symbol.name == NULL))
1877 s->n_sect = s->symbol.section->output_section->target_index;
1878
1879 /* Number to preserve order for local and debug syms. */
1880 s->symbol.udata.i = i;
1881 }
1882
1883 /* Sort the symbols. */
1884 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
1885 sizeof (asymbol *), bfd_mach_o_cf_symbols);
1886
1887 for (i = 0; i < bfd_get_symcount (abfd); ++i)
1888 {
1889 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
1890 s->symbol.udata.i = i; /* renumber. */
1891 }
1892
1893 return TRUE;
1894 }
1895
1896 /* We build a flat table of sections, which can be re-ordered if necessary.
1897 Fill in the section number and other mach-o-specific data. */
1898
1899 static bfd_boolean
1900 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
1901 {
1902 asection *sec;
1903 unsigned target_index;
1904 unsigned nsect;
1905
1906 nsect = bfd_count_sections (abfd);
1907
1908 /* Don't do it if it's already set - assume the application knows what it's
1909 doing. */
1910 if (mdata->nsects == nsect
1911 && (mdata->nsects == 0 || mdata->sections != NULL))
1912 return TRUE;
1913
1914 mdata->nsects = nsect;
1915 mdata->sections = bfd_alloc (abfd,
1916 mdata->nsects * sizeof (bfd_mach_o_section *));
1917 if (mdata->sections == NULL)
1918 return FALSE;
1919
1920 /* We need to check that this can be done... */
1921 if (nsect > 255)
1922 (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
1923 " maximum is 255,\n"), nsect);
1924
1925 /* Create Mach-O sections.
1926 Section type, attribute and align should have been set when the
1927 section was created - either read in or specified. */
1928 target_index = 0;
1929 for (sec = abfd->sections; sec; sec = sec->next)
1930 {
1931 unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
1932 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
1933
1934 mdata->sections[target_index] = msect;
1935
1936 msect->addr = bfd_get_section_vma (abfd, sec);
1937 msect->size = bfd_get_section_size (sec);
1938
1939 /* Use the largest alignment set, in case it was bumped after the
1940 section was created. */
1941 msect->align = msect->align > bfd_align ? msect->align : bfd_align;
1942
1943 msect->offset = 0;
1944 sec->target_index = ++target_index;
1945 }
1946
1947 return TRUE;
1948 }
1949
1950 bfd_boolean
1951 bfd_mach_o_write_contents (bfd *abfd)
1952 {
1953 unsigned int i;
1954 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
1955
1956 /* Make the commands, if not already present. */
1957 if (mdata->header.ncmds == 0)
1958 if (!bfd_mach_o_build_commands (abfd))
1959 return FALSE;
1960
1961 if (!bfd_mach_o_write_header (abfd, &mdata->header))
1962 return FALSE;
1963
1964 for (i = 0; i < mdata->header.ncmds; i++)
1965 {
1966 struct mach_o_load_command_external raw;
1967 bfd_mach_o_load_command *cur = &mdata->commands[i];
1968 unsigned long typeflag;
1969
1970 typeflag = cur->type | (cur->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0);
1971
1972 bfd_h_put_32 (abfd, typeflag, raw.cmd);
1973 bfd_h_put_32 (abfd, cur->len, raw.cmdsize);
1974
1975 if (bfd_seek (abfd, cur->offset, SEEK_SET) != 0
1976 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8)
1977 return FALSE;
1978
1979 switch (cur->type)
1980 {
1981 case BFD_MACH_O_LC_SEGMENT:
1982 if (!bfd_mach_o_write_segment_32 (abfd, cur))
1983 return FALSE;
1984 break;
1985 case BFD_MACH_O_LC_SEGMENT_64:
1986 if (!bfd_mach_o_write_segment_64 (abfd, cur))
1987 return FALSE;
1988 break;
1989 case BFD_MACH_O_LC_SYMTAB:
1990 if (!bfd_mach_o_write_symtab (abfd, cur))
1991 return FALSE;
1992 break;
1993 case BFD_MACH_O_LC_DYSYMTAB:
1994 if (!bfd_mach_o_write_dysymtab (abfd, cur))
1995 return FALSE;
1996 break;
1997 case BFD_MACH_O_LC_SYMSEG:
1998 break;
1999 case BFD_MACH_O_LC_THREAD:
2000 case BFD_MACH_O_LC_UNIXTHREAD:
2001 if (!bfd_mach_o_write_thread (abfd, cur))
2002 return FALSE;
2003 break;
2004 case BFD_MACH_O_LC_LOADFVMLIB:
2005 case BFD_MACH_O_LC_IDFVMLIB:
2006 case BFD_MACH_O_LC_IDENT:
2007 case BFD_MACH_O_LC_FVMFILE:
2008 case BFD_MACH_O_LC_PREPAGE:
2009 case BFD_MACH_O_LC_LOAD_DYLIB:
2010 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
2011 case BFD_MACH_O_LC_ID_DYLIB:
2012 case BFD_MACH_O_LC_REEXPORT_DYLIB:
2013 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
2014 case BFD_MACH_O_LC_LOAD_DYLINKER:
2015 case BFD_MACH_O_LC_ID_DYLINKER:
2016 case BFD_MACH_O_LC_PREBOUND_DYLIB:
2017 case BFD_MACH_O_LC_ROUTINES:
2018 case BFD_MACH_O_LC_SUB_FRAMEWORK:
2019 break;
2020 default:
2021 (*_bfd_error_handler)
2022 (_("unable to write unknown load command 0x%lx"),
2023 (unsigned long) cur->type);
2024 return FALSE;
2025 }
2026 }
2027
2028 return TRUE;
2029 }
2030
2031 static void
2032 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg,
2033 asection *sec)
2034 {
2035 bfd_mach_o_section *s = (bfd_mach_o_section *)sec->used_by_bfd;
2036 if (seg->sect_head == NULL)
2037 seg->sect_head = s;
2038 else
2039 seg->sect_tail->next = s;
2040 seg->sect_tail = s;
2041 }
2042
2043 /* Create section Mach-O flags from BFD flags. */
2044
2045 static void
2046 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED,
2047 asection *sec)
2048 {
2049 flagword bfd_flags;
2050 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec);
2051
2052 /* Create default flags. */
2053 bfd_flags = bfd_get_section_flags (abfd, sec);
2054 if ((bfd_flags & SEC_CODE) == SEC_CODE)
2055 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
2056 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
2057 | BFD_MACH_O_S_REGULAR;
2058 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC)
2059 s->flags = BFD_MACH_O_S_ZEROFILL;
2060 else if (bfd_flags & SEC_DEBUGGING)
2061 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG;
2062 else
2063 s->flags = BFD_MACH_O_S_REGULAR;
2064 }
2065
2066 /* Count the number of sections in the list for the segment named.
2067
2068 The special case of NULL or "" for the segment name is valid for
2069 an MH_OBJECT file and means 'all sections available'.
2070
2071 Requires that the sections table in mdata be filled in.
2072
2073 Returns the number of sections (0 is valid).
2074 Any number > 255 signals an invalid section count, although we will,
2075 perhaps, allow the file to be written (in line with Darwin tools up
2076 to XCode 4).
2077
2078 A section count of (unsigned long) -1 signals a definite error. */
2079
2080 static unsigned long
2081 bfd_mach_o_count_sections_for_seg (const char *segment,
2082 bfd_mach_o_data_struct *mdata)
2083 {
2084 unsigned i,j;
2085 if (mdata == NULL || mdata->sections == NULL)
2086 return (unsigned long) -1;
2087
2088 /* The MH_OBJECT case, all sections are considered; Although nsects is
2089 is an unsigned long, the maximum valid section count is 255 and this
2090 will have been checked already by mangle_sections. */
2091 if (segment == NULL || segment[0] == '\0')
2092 return mdata->nsects;
2093
2094 /* Count the number of sections we see in this segment. */
2095 j = 0;
2096 for (i = 0; i < mdata->nsects; ++i)
2097 {
2098 bfd_mach_o_section *s = mdata->sections[i];
2099 if (strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
2100 j++;
2101 }
2102 return j;
2103 }
2104
2105 static bfd_boolean
2106 bfd_mach_o_build_seg_command (const char *segment,
2107 bfd_mach_o_data_struct *mdata,
2108 bfd_mach_o_segment_command *seg)
2109 {
2110 unsigned i;
2111 int is_mho = (segment == NULL || segment[0] == '\0');
2112
2113 /* Fill segment command. */
2114 if (is_mho)
2115 memset (seg->segname, 0, sizeof (seg->segname));
2116 else
2117 strncpy (seg->segname, segment, sizeof (seg->segname));
2118
2119 /* TODO: fix this up for non-MH_OBJECT cases. */
2120 seg->vmaddr = 0;
2121 seg->vmsize = 0;
2122
2123 seg->fileoff = mdata->filelen;
2124 seg->filesize = 0;
2125 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
2126 | BFD_MACH_O_PROT_EXECUTE;
2127 seg->initprot = seg->maxprot;
2128 seg->flags = 0;
2129 seg->sect_head = NULL;
2130 seg->sect_tail = NULL;
2131
2132 /* Append sections to the segment.
2133
2134 This is a little tedious, we have to honor the need to account zerofill
2135 sections after all the rest. This forces us to do the calculation of
2136 total vmsize in three passes so that any alignment increments are
2137 properly accounted. */
2138
2139 for (i = 0; i < mdata->nsects; ++i)
2140 {
2141 bfd_mach_o_section *s = mdata->sections[i];
2142 asection *sec = s->bfdsection;
2143
2144 /* If we're not making an MH_OBJECT, check whether this section is from
2145 our segment, and skip if not. Otherwise, just add all sections. */
2146 if (! is_mho
2147 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2148 continue;
2149
2150 /* Although we account for zerofill section sizes in vm order, they are
2151 placed in the file in source sequence. */
2152 bfd_mach_o_append_section_to_segment (seg, sec);
2153 s->offset = 0;
2154
2155 /* Zerofill sections have zero file size & offset,
2156 and are not written. */
2157 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
2158 || (s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2159 == BFD_MACH_O_S_GB_ZEROFILL)
2160 continue;
2161
2162 if (s->size > 0)
2163 {
2164 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2165 seg->vmsize += s->size;
2166
2167 seg->filesize = FILE_ALIGN (seg->filesize, s->align);
2168 seg->filesize += s->size;
2169
2170 /* Note: follow alignment even for object file. */
2171 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
2172 s->offset = mdata->filelen;
2173 }
2174
2175 sec->filepos = s->offset;
2176 mdata->filelen += s->size;
2177 }
2178
2179 /* Be sure the file offset of the segment is the file offset of its first
2180 section (may have changed due to alignment). */
2181 if (seg->sect_head != NULL)
2182 seg->fileoff = seg->sect_head->offset;
2183
2184 /* Now pass through again, for zerofill, only now we just update the
2185 vmsize. */
2186 for (i = 0; i < mdata->nsects; ++i)
2187 {
2188 bfd_mach_o_section *s = mdata->sections[i];
2189
2190 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL)
2191 continue;
2192
2193 if (! is_mho
2194 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2195 continue;
2196
2197 if (s->size > 0)
2198 {
2199 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2200 seg->vmsize += s->size;
2201 }
2202 }
2203
2204 /* Now pass through again, for zerofill_GB. */
2205 for (i = 0; i < mdata->nsects; ++i)
2206 {
2207 bfd_mach_o_section *s = mdata->sections[i];
2208
2209 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_GB_ZEROFILL)
2210 continue;
2211
2212 if (! is_mho
2213 && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
2214 continue;
2215
2216 if (s->size > 0)
2217 {
2218 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
2219 seg->vmsize += s->size;
2220 }
2221 }
2222
2223 /* Allocate space for the relocations. */
2224 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2225
2226 for (i = 0; i < mdata->nsects; ++i)
2227 {
2228 bfd_mach_o_section *ms = mdata->sections[i];
2229 asection *sec = ms->bfdsection;
2230
2231 if ((ms->nreloc = sec->reloc_count) == 0)
2232 {
2233 ms->reloff = 0;
2234 continue;
2235 }
2236 sec->rel_filepos = mdata->filelen;
2237 ms->reloff = sec->rel_filepos;
2238 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
2239 }
2240
2241 return TRUE;
2242 }
2243
2244 /* Count the number of indirect symbols in the image.
2245 Requires that the sections are in their final order. */
2246
2247 static unsigned int
2248 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
2249 {
2250 unsigned int i;
2251 unsigned int nisyms = 0;
2252
2253 for (i = 0; i < mdata->nsects; ++i)
2254 {
2255 bfd_mach_o_section *sec = mdata->sections[i];
2256
2257 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2258 {
2259 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2260 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2261 case BFD_MACH_O_S_SYMBOL_STUBS:
2262 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2263 break;
2264 default:
2265 break;
2266 }
2267 }
2268 return nisyms;
2269 }
2270
2271 static bfd_boolean
2272 bfd_mach_o_build_dysymtab_command (bfd *abfd,
2273 bfd_mach_o_data_struct *mdata,
2274 bfd_mach_o_load_command *cmd)
2275 {
2276 bfd_mach_o_dysymtab_command *dsym = &cmd->command.dysymtab;
2277
2278 /* TODO:
2279 We are not going to try and fill these in yet and, moreover, we are
2280 going to bail if they are already set. */
2281 if (dsym->nmodtab != 0
2282 || dsym->ntoc != 0
2283 || dsym->nextrefsyms != 0)
2284 {
2285 (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
2286 " implemented for dysymtab commands."));
2287 return FALSE;
2288 }
2289
2290 dsym->ilocalsym = 0;
2291
2292 if (bfd_get_symcount (abfd) > 0)
2293 {
2294 asymbol **symbols = bfd_get_outsymbols (abfd);
2295 unsigned long i;
2296
2297 /* Count the number of each kind of symbol. */
2298 for (i = 0; i < bfd_get_symcount (abfd); ++i)
2299 {
2300 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2301 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))
2302 break;
2303 }
2304 dsym->nlocalsym = i;
2305 dsym->iextdefsym = i;
2306 for (; i < bfd_get_symcount (abfd); ++i)
2307 {
2308 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
2309 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF)
2310 break;
2311 }
2312 dsym->nextdefsym = i - dsym->nlocalsym;
2313 dsym->iundefsym = dsym->nextdefsym + dsym->iextdefsym;
2314 dsym->nundefsym = bfd_get_symcount (abfd)
2315 - dsym->nlocalsym
2316 - dsym->nextdefsym;
2317 }
2318 else
2319 {
2320 dsym->nlocalsym = 0;
2321 dsym->iextdefsym = 0;
2322 dsym->nextdefsym = 0;
2323 dsym->iundefsym = 0;
2324 dsym->nundefsym = 0;
2325 }
2326
2327 dsym->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
2328 if (dsym->nindirectsyms > 0)
2329 {
2330 unsigned i;
2331 unsigned n;
2332
2333 mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
2334 dsym->indirectsymoff = mdata->filelen;
2335 mdata->filelen += dsym->nindirectsyms * 4;
2336
2337 dsym->indirect_syms = bfd_zalloc (abfd, dsym->nindirectsyms * 4);
2338 if (dsym->indirect_syms == NULL)
2339 return FALSE;
2340
2341 n = 0;
2342 for (i = 0; i < mdata->nsects; ++i)
2343 {
2344 bfd_mach_o_section *sec = mdata->sections[i];
2345
2346 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2347 {
2348 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
2349 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
2350 case BFD_MACH_O_S_SYMBOL_STUBS:
2351 {
2352 unsigned j, num;
2353 bfd_mach_o_asymbol **isyms = sec->indirect_syms;
2354
2355 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
2356 if (isyms == NULL || num == 0)
2357 break;
2358 /* Record the starting index in the reserved1 field. */
2359 sec->reserved1 = n;
2360 for (j = 0; j < num; j++, n++)
2361 {
2362 if (isyms[j] == NULL)
2363 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
2364 else if (isyms[j]->symbol.section == bfd_abs_section_ptr
2365 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
2366 dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
2367 | BFD_MACH_O_INDIRECT_SYM_ABS;
2368 else
2369 dsym->indirect_syms[n] = isyms[j]->symbol.udata.i;
2370 }
2371 }
2372 break;
2373 default:
2374 break;
2375 }
2376 }
2377 }
2378
2379 return TRUE;
2380 }
2381
2382 /* Build Mach-O load commands (currently assuming an MH_OBJECT file).
2383 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
2384 and copy functionality. */
2385
2386 bfd_boolean
2387 bfd_mach_o_build_commands (bfd *abfd)
2388 {
2389 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2390 unsigned wide = mach_o_wide_p (&mdata->header);
2391 int segcmd_idx = -1;
2392 int symtab_idx = -1;
2393 int dysymtab_idx = -1;
2394 unsigned long base_offset = 0;
2395
2396 /* Return now if commands are already present. */
2397 if (mdata->header.ncmds)
2398 return FALSE;
2399
2400 /* Fill in the file type, if not already set. */
2401
2402 if (mdata->header.filetype == 0)
2403 {
2404 if (abfd->flags & EXEC_P)
2405 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
2406 else if (abfd->flags & DYNAMIC)
2407 mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
2408 else
2409 mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
2410 }
2411
2412 /* If hasn't already been done, flatten sections list, and sort
2413 if/when required. Must be done before the symbol table is adjusted,
2414 since that depends on properly numbered sections. */
2415 if (mdata->nsects == 0 || mdata->sections == NULL)
2416 if (! bfd_mach_o_mangle_sections (abfd, mdata))
2417 return FALSE;
2418
2419 /* Order the symbol table, fill-in/check mach-o specific fields and
2420 partition out any indirect symbols. */
2421 if (!bfd_mach_o_mangle_symbols (abfd))
2422 return FALSE;
2423
2424 /* Very simple command set (only really applicable to MH_OBJECTs):
2425 All the commands are optional - present only when there is suitable data.
2426 (i.e. it is valid to have an empty file)
2427
2428 a command (segment) to contain all the sections,
2429 command for the symbol table,
2430 a command for the dysymtab.
2431
2432 ??? maybe we should assert that this is an MH_OBJECT? */
2433
2434 if (mdata->nsects > 0)
2435 {
2436 segcmd_idx = 0;
2437 mdata->header.ncmds = 1;
2438 }
2439
2440 if (bfd_get_symcount (abfd) > 0)
2441 {
2442 mdata->header.ncmds++;
2443 symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */
2444 }
2445
2446 /* FIXME:
2447 This is a rather crude test for whether we should build a dysymtab. */
2448 if (bfd_mach_o_should_emit_dysymtab ()
2449 && bfd_get_symcount (abfd))
2450 {
2451 mdata->header.ncmds++;
2452 /* If there should be a case where a dysymtab could be emitted without
2453 a symtab (seems improbable), this would need amending. */
2454 dysymtab_idx = symtab_idx + 1;
2455 }
2456
2457 if (wide)
2458 base_offset = BFD_MACH_O_HEADER_64_SIZE;
2459 else
2460 base_offset = BFD_MACH_O_HEADER_SIZE;
2461
2462 /* Well, we must have a header, at least. */
2463 mdata->filelen = base_offset;
2464
2465 /* A bit unusual, but no content is valid;
2466 as -n empty.s -o empty.o */
2467 if (mdata->header.ncmds == 0)
2468 return TRUE;
2469
2470 mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds
2471 * sizeof (bfd_mach_o_load_command));
2472 if (mdata->commands == NULL)
2473 return FALSE;
2474
2475 if (segcmd_idx >= 0)
2476 {
2477 bfd_mach_o_load_command *cmd = &mdata->commands[segcmd_idx];
2478 bfd_mach_o_segment_command *seg = &cmd->command.segment;
2479
2480 /* Count the segctions in the special blank segment used
2481 for MH_OBJECT. */
2482 seg->nsects = bfd_mach_o_count_sections_for_seg (NULL, mdata);
2483 if (seg->nsects == (unsigned long) -1)
2484 return FALSE;
2485
2486 /* Init segment command. */
2487 cmd->offset = base_offset;
2488 if (wide)
2489 {
2490 cmd->type = BFD_MACH_O_LC_SEGMENT_64;
2491 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
2492 + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
2493 }
2494 else
2495 {
2496 cmd->type = BFD_MACH_O_LC_SEGMENT;
2497 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
2498 + BFD_MACH_O_SECTION_SIZE * seg->nsects;
2499 }
2500
2501 cmd->type_required = FALSE;
2502 mdata->header.sizeofcmds = cmd->len;
2503 mdata->filelen += cmd->len;
2504 }
2505
2506 if (symtab_idx >= 0)
2507 {
2508 /* Init symtab command. */
2509 bfd_mach_o_load_command *cmd = &mdata->commands[symtab_idx];
2510
2511 cmd->type = BFD_MACH_O_LC_SYMTAB;
2512 cmd->offset = base_offset;
2513 if (segcmd_idx >= 0)
2514 cmd->offset += mdata->commands[segcmd_idx].len;
2515
2516 cmd->len = sizeof (struct mach_o_symtab_command_external)
2517 + BFD_MACH_O_LC_SIZE;
2518 cmd->type_required = FALSE;
2519 mdata->header.sizeofcmds += cmd->len;
2520 mdata->filelen += cmd->len;
2521 }
2522
2523 /* If required, setup symtab command, see comment above about the quality
2524 of this test. */
2525 if (dysymtab_idx >= 0)
2526 {
2527 bfd_mach_o_load_command *cmd = &mdata->commands[dysymtab_idx];
2528
2529 cmd->type = BFD_MACH_O_LC_DYSYMTAB;
2530 if (symtab_idx >= 0)
2531 cmd->offset = mdata->commands[symtab_idx].offset
2532 + mdata->commands[symtab_idx].len;
2533 else if (segcmd_idx >= 0)
2534 cmd->offset = mdata->commands[segcmd_idx].offset
2535 + mdata->commands[segcmd_idx].len;
2536 else
2537 cmd->offset = base_offset;
2538
2539 cmd->type_required = FALSE;
2540 cmd->len = sizeof (struct mach_o_dysymtab_command_external)
2541 + BFD_MACH_O_LC_SIZE;
2542
2543 mdata->header.sizeofcmds += cmd->len;
2544 mdata->filelen += cmd->len;
2545 }
2546
2547 /* So, now we have sized the commands and the filelen set to that.
2548 Now we can build the segment command and set the section file offsets. */
2549 if (segcmd_idx >= 0
2550 && ! bfd_mach_o_build_seg_command
2551 (NULL, mdata, &mdata->commands[segcmd_idx].command.segment))
2552 return FALSE;
2553
2554 /* If we're doing a dysymtab, cmd points to its load command. */
2555 if (dysymtab_idx >= 0
2556 && ! bfd_mach_o_build_dysymtab_command (abfd, mdata,
2557 &mdata->commands[dysymtab_idx]))
2558 return FALSE;
2559
2560 /* The symtab command is filled in when the symtab is written. */
2561 return TRUE;
2562 }
2563
2564 /* Set the contents of a section. */
2565
2566 bfd_boolean
2567 bfd_mach_o_set_section_contents (bfd *abfd,
2568 asection *section,
2569 const void * location,
2570 file_ptr offset,
2571 bfd_size_type count)
2572 {
2573 file_ptr pos;
2574
2575 /* Trying to write the first section contents will trigger the creation of
2576 the load commands if they are not already present. */
2577 if (! abfd->output_has_begun && ! bfd_mach_o_build_commands (abfd))
2578 return FALSE;
2579
2580 if (count == 0)
2581 return TRUE;
2582
2583 pos = section->filepos + offset;
2584 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2585 || bfd_bwrite (location, count, abfd) != count)
2586 return FALSE;
2587
2588 return TRUE;
2589 }
2590
2591 int
2592 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
2593 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2594 {
2595 return 0;
2596 }
2597
2598 /* Make an empty symbol. This is required only because
2599 bfd_make_section_anyway wants to create a symbol for the section. */
2600
2601 asymbol *
2602 bfd_mach_o_make_empty_symbol (bfd *abfd)
2603 {
2604 asymbol *new_symbol;
2605
2606 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
2607 if (new_symbol == NULL)
2608 return new_symbol;
2609 new_symbol->the_bfd = abfd;
2610 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
2611 return new_symbol;
2612 }
2613
2614 static bfd_boolean
2615 bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)
2616 {
2617 struct mach_o_header_external raw;
2618 unsigned int size;
2619 bfd_vma (*get32) (const void *) = NULL;
2620
2621 /* Just read the magic number. */
2622 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2623 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4)
2624 return FALSE;
2625
2626 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2627 {
2628 header->byteorder = BFD_ENDIAN_BIG;
2629 header->magic = BFD_MACH_O_MH_MAGIC;
2630 header->version = 1;
2631 get32 = bfd_getb32;
2632 }
2633 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC)
2634 {
2635 header->byteorder = BFD_ENDIAN_LITTLE;
2636 header->magic = BFD_MACH_O_MH_MAGIC;
2637 header->version = 1;
2638 get32 = bfd_getl32;
2639 }
2640 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2641 {
2642 header->byteorder = BFD_ENDIAN_BIG;
2643 header->magic = BFD_MACH_O_MH_MAGIC_64;
2644 header->version = 2;
2645 get32 = bfd_getb32;
2646 }
2647 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64)
2648 {
2649 header->byteorder = BFD_ENDIAN_LITTLE;
2650 header->magic = BFD_MACH_O_MH_MAGIC_64;
2651 header->version = 2;
2652 get32 = bfd_getl32;
2653 }
2654 else
2655 {
2656 header->byteorder = BFD_ENDIAN_UNKNOWN;
2657 return FALSE;
2658 }
2659
2660 /* Once the size of the header is known, read the full header. */
2661 size = mach_o_wide_p (header) ?
2662 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
2663
2664 if (bfd_seek (abfd, 0, SEEK_SET) != 0
2665 || bfd_bread (&raw, size, abfd) != size)
2666 return FALSE;
2667
2668 header->cputype = (*get32) (raw.cputype);
2669 header->cpusubtype = (*get32) (raw.cpusubtype);
2670 header->filetype = (*get32) (raw.filetype);
2671 header->ncmds = (*get32) (raw.ncmds);
2672 header->sizeofcmds = (*get32) (raw.sizeofcmds);
2673 header->flags = (*get32) (raw.flags);
2674
2675 if (mach_o_wide_p (header))
2676 header->reserved = (*get32) (raw.reserved);
2677 else
2678 header->reserved = 0;
2679
2680 return TRUE;
2681 }
2682
2683 bfd_boolean
2684 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec)
2685 {
2686 bfd_mach_o_section *s;
2687 unsigned bfdalign = bfd_get_section_alignment (abfd, sec);
2688
2689 s = bfd_mach_o_get_mach_o_section (sec);
2690 if (s == NULL)
2691 {
2692 flagword bfd_flags;
2693 static const mach_o_section_name_xlat * xlat;
2694
2695 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s));
2696 if (s == NULL)
2697 return FALSE;
2698 sec->used_by_bfd = s;
2699 s->bfdsection = sec;
2700
2701 /* Create the Darwin seg/sect name pair from the bfd name.
2702 If this is a canonical name for which a specific paiting exists
2703 there will also be defined flags, type, attribute and alignment
2704 values. */
2705 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s);
2706 if (xlat != NULL)
2707 {
2708 s->flags = xlat->macho_sectype | xlat->macho_secattr;
2709 s->align = xlat->sectalign > bfdalign ? xlat->sectalign
2710 : bfdalign;
2711 (void) bfd_set_section_alignment (abfd, sec, s->align);
2712 bfd_flags = bfd_get_section_flags (abfd, sec);
2713 if (bfd_flags == SEC_NO_FLAGS)
2714 bfd_set_section_flags (abfd, sec, xlat->bfd_flags);
2715 }
2716 else
2717 /* Create default flags. */
2718 bfd_mach_o_set_section_flags_from_bfd (abfd, sec);
2719 }
2720
2721 return _bfd_generic_new_section_hook (abfd, sec);
2722 }
2723
2724 static void
2725 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec,
2726 unsigned long prot)
2727 {
2728 flagword flags;
2729 bfd_mach_o_section *section;
2730
2731 flags = bfd_get_section_flags (abfd, sec);
2732 section = bfd_mach_o_get_mach_o_section (sec);
2733
2734 /* TODO: see if we should use the xlat system for doing this by
2735 preference and fall back to this for unknown sections. */
2736
2737 if (flags == SEC_NO_FLAGS)
2738 {
2739 /* Try to guess flags. */
2740 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG)
2741 flags = SEC_DEBUGGING;
2742 else
2743 {
2744 flags = SEC_ALLOC;
2745 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK)
2746 != BFD_MACH_O_S_ZEROFILL)
2747 {
2748 flags |= SEC_LOAD;
2749 if (prot & BFD_MACH_O_PROT_EXECUTE)
2750 flags |= SEC_CODE;
2751 if (prot & BFD_MACH_O_PROT_WRITE)
2752 flags |= SEC_DATA;
2753 else if (prot & BFD_MACH_O_PROT_READ)
2754 flags |= SEC_READONLY;
2755 }
2756 }
2757 }
2758 else
2759 {
2760 if ((flags & SEC_DEBUGGING) == 0)
2761 flags |= SEC_ALLOC;
2762 }
2763
2764 if (section->offset != 0)
2765 flags |= SEC_HAS_CONTENTS;
2766 if (section->nreloc != 0)
2767 flags |= SEC_RELOC;
2768
2769 bfd_set_section_flags (abfd, sec, flags);
2770
2771 sec->vma = section->addr;
2772 sec->lma = section->addr;
2773 sec->size = section->size;
2774 sec->filepos = section->offset;
2775 sec->alignment_power = section->align;
2776 sec->segment_mark = 0;
2777 sec->reloc_count = section->nreloc;
2778 sec->rel_filepos = section->reloff;
2779 }
2780
2781 static asection *
2782 bfd_mach_o_make_bfd_section (bfd *abfd,
2783 const unsigned char *segname,
2784 const unsigned char *sectname)
2785 {
2786 const char *sname;
2787 flagword flags;
2788
2789 bfd_mach_o_convert_section_name_to_bfd
2790 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags);
2791 if (sname == NULL)
2792 return NULL;
2793
2794 return bfd_make_section_anyway_with_flags (abfd, sname, flags);
2795 }
2796
2797 static asection *
2798 bfd_mach_o_read_section_32 (bfd *abfd,
2799 unsigned int offset,
2800 unsigned long prot)
2801 {
2802 struct mach_o_section_32_external raw;
2803 asection *sec;
2804 bfd_mach_o_section *section;
2805
2806 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2807 || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd)
2808 != BFD_MACH_O_SECTION_SIZE))
2809 return NULL;
2810
2811 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2812 if (sec == NULL)
2813 return NULL;
2814
2815 section = bfd_mach_o_get_mach_o_section (sec);
2816 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2817 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2818 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2819 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2820 section->addr = bfd_h_get_32 (abfd, raw.addr);
2821 section->size = bfd_h_get_32 (abfd, raw.size);
2822 section->offset = bfd_h_get_32 (abfd, raw.offset);
2823 section->align = bfd_h_get_32 (abfd, raw.align);
2824 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2825 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2826 section->flags = bfd_h_get_32 (abfd, raw.flags);
2827 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2828 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2829 section->reserved3 = 0;
2830
2831 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2832
2833 return sec;
2834 }
2835
2836 static asection *
2837 bfd_mach_o_read_section_64 (bfd *abfd,
2838 unsigned int offset,
2839 unsigned long prot)
2840 {
2841 struct mach_o_section_64_external raw;
2842 asection *sec;
2843 bfd_mach_o_section *section;
2844
2845 if (bfd_seek (abfd, offset, SEEK_SET) != 0
2846 || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd)
2847 != BFD_MACH_O_SECTION_64_SIZE))
2848 return NULL;
2849
2850 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname);
2851 if (sec == NULL)
2852 return NULL;
2853
2854 section = bfd_mach_o_get_mach_o_section (sec);
2855 memcpy (section->segname, raw.segname, sizeof (raw.segname));
2856 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0;
2857 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname));
2858 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0;
2859 section->addr = bfd_h_get_64 (abfd, raw.addr);
2860 section->size = bfd_h_get_64 (abfd, raw.size);
2861 section->offset = bfd_h_get_32 (abfd, raw.offset);
2862 section->align = bfd_h_get_32 (abfd, raw.align);
2863 section->reloff = bfd_h_get_32 (abfd, raw.reloff);
2864 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc);
2865 section->flags = bfd_h_get_32 (abfd, raw.flags);
2866 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1);
2867 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2);
2868 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3);
2869
2870 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot);
2871
2872 return sec;
2873 }
2874
2875 static asection *
2876 bfd_mach_o_read_section (bfd *abfd,
2877 unsigned int offset,
2878 unsigned long prot,
2879 unsigned int wide)
2880 {
2881 if (wide)
2882 return bfd_mach_o_read_section_64 (abfd, offset, prot);
2883 else
2884 return bfd_mach_o_read_section_32 (abfd, offset, prot);
2885 }
2886
2887 static bfd_boolean
2888 bfd_mach_o_read_symtab_symbol (bfd *abfd,
2889 bfd_mach_o_symtab_command *sym,
2890 bfd_mach_o_asymbol *s,
2891 unsigned long i)
2892 {
2893 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
2894 unsigned int wide = mach_o_wide_p (&mdata->header);
2895 unsigned int symwidth =
2896 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE;
2897 unsigned int symoff = sym->symoff + (i * symwidth);
2898 struct mach_o_nlist_64_external raw;
2899 unsigned char type = -1;
2900 unsigned char section = -1;
2901 short desc = -1;
2902 symvalue value = -1;
2903 unsigned long stroff = -1;
2904 unsigned int symtype = -1;
2905
2906 BFD_ASSERT (sym->strtab != NULL);
2907
2908 if (bfd_seek (abfd, symoff, SEEK_SET) != 0
2909 || bfd_bread (&raw, symwidth, abfd) != symwidth)
2910 {
2911 (*_bfd_error_handler)
2912 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"),
2913 symwidth, (unsigned long) symoff);
2914 return FALSE;
2915 }
2916
2917 stroff = bfd_h_get_32 (abfd, raw.n_strx);
2918 type = bfd_h_get_8 (abfd, raw.n_type);
2919 symtype = type & BFD_MACH_O_N_TYPE;
2920 section = bfd_h_get_8 (abfd, raw.n_sect);
2921 desc = bfd_h_get_16 (abfd, raw.n_desc);
2922 if (wide)
2923 value = bfd_h_get_64 (abfd, raw.n_value);
2924 else
2925 value = bfd_h_get_32 (abfd, raw.n_value);
2926
2927 if (stroff >= sym->strsize)
2928 {
2929 (*_bfd_error_handler)
2930 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"),
2931 (unsigned long) stroff,
2932 (unsigned long) sym->strsize);
2933 return FALSE;
2934 }
2935
2936 s->symbol.the_bfd = abfd;
2937 s->symbol.name = sym->strtab + stroff;
2938 s->symbol.value = value;
2939 s->symbol.flags = 0x0;
2940 s->symbol.udata.i = i;
2941 s->n_type = type;
2942 s->n_sect = section;
2943 s->n_desc = desc;
2944
2945 if (type & BFD_MACH_O_N_STAB)
2946 {
2947 s->symbol.flags |= BSF_DEBUGGING;
2948 s->symbol.section = bfd_und_section_ptr;
2949 switch (type)
2950 {
2951 case N_FUN:
2952 case N_STSYM:
2953 case N_LCSYM:
2954 case N_BNSYM:
2955 case N_SLINE:
2956 case N_ENSYM:
2957 case N_ECOMM:
2958 case N_ECOML:
2959 case N_GSYM:
2960 if ((section > 0) && (section <= mdata->nsects))
2961 {
2962 s->symbol.section = mdata->sections[section - 1]->bfdsection;
2963 s->symbol.value =
2964 s->symbol.value - mdata->sections[section - 1]->addr;
2965 }
2966 break;
2967 }
2968 }
2969 else
2970 {
2971 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
2972 s->symbol.flags |= BSF_GLOBAL;
2973 else
2974 s->symbol.flags |= BSF_LOCAL;
2975
2976 switch (symtype)
2977 {
2978 case BFD_MACH_O_N_UNDF:
2979 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
2980 && s->symbol.value != 0)
2981 {
2982 /* A common symbol. */
2983 s->symbol.section = bfd_com_section_ptr;
2984 s->symbol.flags = BSF_NO_FLAGS;
2985 }
2986 else
2987 {
2988 s->symbol.section = bfd_und_section_ptr;
2989 if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
2990 s->symbol.flags |= BSF_WEAK;
2991 }
2992 break;
2993 case BFD_MACH_O_N_PBUD:
2994 s->symbol.section = bfd_und_section_ptr;
2995 break;
2996 case BFD_MACH_O_N_ABS:
2997 s->symbol.section = bfd_abs_section_ptr;
2998 break;
2999 case BFD_MACH_O_N_SECT:
3000 if ((section > 0) && (section <= mdata->nsects))
3001 {
3002 s->symbol.section = mdata->sections[section - 1]->bfdsection;
3003 s->symbol.value =
3004 s->symbol.value - mdata->sections[section - 1]->addr;
3005 }
3006 else
3007 {
3008 /* Mach-O uses 0 to mean "no section"; not an error. */
3009 if (section != 0)
3010 {
3011 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3012 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"),
3013 s->symbol.name, section, mdata->nsects);
3014 }
3015 s->symbol.section = bfd_und_section_ptr;
3016 }
3017 break;
3018 case BFD_MACH_O_N_INDR:
3019 /* FIXME: we don't follow the BFD convention as this indirect symbol
3020 won't be followed by the referenced one. This looks harmless
3021 unless we start using the linker. */
3022 s->symbol.flags |= BSF_INDIRECT;
3023 s->symbol.section = bfd_ind_section_ptr;
3024 s->symbol.value = 0;
3025 break;
3026 default:
3027 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: "
3028 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"),
3029 s->symbol.name, symtype);
3030 s->symbol.section = bfd_und_section_ptr;
3031 break;
3032 }
3033 }
3034
3035 return TRUE;
3036 }
3037
3038 bfd_boolean
3039 bfd_mach_o_read_symtab_strtab (bfd *abfd)
3040 {
3041 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3042 bfd_mach_o_symtab_command *sym = mdata->symtab;
3043
3044 /* Fail if there is no symtab. */
3045 if (sym == NULL)
3046 return FALSE;
3047
3048 /* Success if already loaded. */
3049 if (sym->strtab)
3050 return TRUE;
3051
3052 if (abfd->flags & BFD_IN_MEMORY)
3053 {
3054 struct bfd_in_memory *b;
3055
3056 b = (struct bfd_in_memory *) abfd->iostream;
3057
3058 if ((sym->stroff + sym->strsize) > b->size)
3059 {
3060 bfd_set_error (bfd_error_file_truncated);
3061 return FALSE;
3062 }
3063 sym->strtab = (char *) b->buffer + sym->stroff;
3064 }
3065 else
3066 {
3067 sym->strtab = bfd_alloc (abfd, sym->strsize);
3068 if (sym->strtab == NULL)
3069 return FALSE;
3070
3071 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
3072 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize)
3073 {
3074 bfd_set_error (bfd_error_file_truncated);
3075 return FALSE;
3076 }
3077 }
3078
3079 return TRUE;
3080 }
3081
3082 bfd_boolean
3083 bfd_mach_o_read_symtab_symbols (bfd *abfd)
3084 {
3085 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3086 bfd_mach_o_symtab_command *sym = mdata->symtab;
3087 unsigned long i;
3088
3089 if (sym == NULL || sym->symbols)
3090 {
3091 /* Return now if there are no symbols or if already loaded. */
3092 return TRUE;
3093 }
3094
3095 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
3096
3097 if (sym->symbols == NULL)
3098 {
3099 (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols"));
3100 return FALSE;
3101 }
3102
3103 if (!bfd_mach_o_read_symtab_strtab (abfd))
3104 return FALSE;
3105
3106 for (i = 0; i < sym->nsyms; i++)
3107 {
3108 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i))
3109 return FALSE;
3110 }
3111
3112 return TRUE;
3113 }
3114
3115 static const char *
3116 bfd_mach_o_i386_flavour_string (unsigned int flavour)
3117 {
3118 switch ((int) flavour)
3119 {
3120 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32";
3121 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32";
3122 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32";
3123 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64";
3124 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64";
3125 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64";
3126 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE";
3127 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE";
3128 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE";
3129 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32";
3130 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64";
3131 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE";
3132 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE";
3133 default: return "UNKNOWN";
3134 }
3135 }
3136
3137 static const char *
3138 bfd_mach_o_ppc_flavour_string (unsigned int flavour)
3139 {
3140 switch ((int) flavour)
3141 {
3142 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
3143 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
3144 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
3145 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
3146 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64";
3147 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64";
3148 default: return "UNKNOWN";
3149 }
3150 }
3151
3152 static bfd_boolean
3153 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command)
3154 {
3155 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
3156 struct mach_o_str_command_external raw;
3157 unsigned int nameoff;
3158 unsigned int namelen;
3159
3160 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3161 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3162 return FALSE;
3163
3164 nameoff = bfd_h_get_32 (abfd, raw.str);
3165
3166 cmd->name_offset = nameoff;
3167 namelen = command->len - nameoff;
3168 nameoff += command->offset;
3169 cmd->name_str = bfd_alloc (abfd, namelen);
3170 if (cmd->name_str == NULL)
3171 return FALSE;
3172 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0
3173 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3174 return FALSE;
3175 return TRUE;
3176 }
3177
3178 static bfd_boolean
3179 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command)
3180 {
3181 bfd_mach_o_dylib_command *cmd = &command->command.dylib;
3182 struct mach_o_dylib_command_external raw;
3183 unsigned int nameoff;
3184 unsigned int namelen;
3185
3186 switch (command->type)
3187 {
3188 case BFD_MACH_O_LC_LOAD_DYLIB:
3189 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3190 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3191 case BFD_MACH_O_LC_ID_DYLIB:
3192 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3193 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3194 break;
3195 default:
3196 BFD_FAIL ();
3197 return FALSE;
3198 }
3199
3200 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3201 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3202 return FALSE;
3203
3204 nameoff = bfd_h_get_32 (abfd, raw.name);
3205 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp);
3206 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version);
3207 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version);
3208
3209 cmd->name_offset = command->offset + nameoff;
3210 namelen = command->len - nameoff;
3211 cmd->name_str = bfd_alloc (abfd, namelen);
3212 if (cmd->name_str == NULL)
3213 return FALSE;
3214 if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0
3215 || bfd_bread (cmd->name_str, namelen, abfd) != namelen)
3216 return FALSE;
3217 return TRUE;
3218 }
3219
3220 static bfd_boolean
3221 bfd_mach_o_read_prebound_dylib (bfd *abfd,
3222 bfd_mach_o_load_command *command)
3223 {
3224 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib;
3225 struct mach_o_prebound_dylib_command_external raw;
3226 unsigned int nameoff;
3227 unsigned int modoff;
3228 unsigned int str_len;
3229 unsigned char *str;
3230
3231 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3232 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3233 return FALSE;
3234
3235 nameoff = bfd_h_get_32 (abfd, raw.name);
3236 modoff = bfd_h_get_32 (abfd, raw.linked_modules);
3237 if (nameoff > command->len || modoff > command->len)
3238 return FALSE;
3239
3240 str_len = command->len - sizeof (raw);
3241 str = bfd_alloc (abfd, str_len);
3242 if (str == NULL)
3243 return FALSE;
3244 if (bfd_bread (str, str_len, abfd) != str_len)
3245 return FALSE;
3246
3247 cmd->name_offset = command->offset + nameoff;
3248 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules);
3249 cmd->linked_modules_offset = command->offset + modoff;
3250
3251 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3252 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE);
3253 return TRUE;
3254 }
3255
3256 static bfd_boolean
3257 bfd_mach_o_read_prebind_cksum (bfd *abfd,
3258 bfd_mach_o_load_command *command)
3259 {
3260 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum;
3261 struct mach_o_prebind_cksum_command_external raw;
3262
3263 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3264 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3265 return FALSE;
3266
3267 cmd->cksum = bfd_get_32 (abfd, raw.cksum);
3268 return TRUE;
3269 }
3270
3271 static bfd_boolean
3272 bfd_mach_o_read_twolevel_hints (bfd *abfd,
3273 bfd_mach_o_load_command *command)
3274 {
3275 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints;
3276 struct mach_o_twolevel_hints_command_external raw;
3277
3278 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3279 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3280 return FALSE;
3281
3282 cmd->offset = bfd_get_32 (abfd, raw.offset);
3283 cmd->nhints = bfd_get_32 (abfd, raw.nhints);
3284 return TRUE;
3285 }
3286
3287 static bfd_boolean
3288 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
3289 {
3290 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
3291 struct mach_o_fvmlib_command_external raw;
3292 unsigned int nameoff;
3293 unsigned int namelen;
3294
3295 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3296 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3297 return FALSE;
3298
3299 nameoff = bfd_h_get_32 (abfd, raw.name);
3300 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
3301 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
3302
3303 fvm->name_offset = command->offset + nameoff;
3304 namelen = command->len - nameoff;
3305 fvm->name_str = bfd_alloc (abfd, namelen);
3306 if (fvm->name_str == NULL)
3307 return FALSE;
3308 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
3309 || bfd_bread (fvm->name_str, namelen, abfd) != namelen)
3310 return FALSE;
3311 return TRUE;
3312 }
3313
3314 static bfd_boolean
3315 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
3316 {
3317 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3318 bfd_mach_o_thread_command *cmd = &command->command.thread;
3319 unsigned int offset;
3320 unsigned int nflavours;
3321 unsigned int i;
3322
3323 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
3324 || (command->type == BFD_MACH_O_LC_UNIXTHREAD));
3325
3326 /* Count the number of threads. */
3327 offset = 8;
3328 nflavours = 0;
3329 while (offset != command->len)
3330 {
3331 struct mach_o_thread_command_external raw;
3332
3333 if (offset >= command->len)
3334 return FALSE;
3335
3336 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3337 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3338 return FALSE;
3339
3340 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4;
3341 nflavours++;
3342 }
3343
3344 /* Allocate threads. */
3345 cmd->flavours = bfd_alloc
3346 (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour));
3347 if (cmd->flavours == NULL)
3348 return FALSE;
3349 cmd->nflavours = nflavours;
3350
3351 offset = 8;
3352 nflavours = 0;
3353 while (offset != command->len)
3354 {
3355 struct mach_o_thread_command_external raw;
3356
3357 if (offset >= command->len)
3358 return FALSE;
3359
3360 if (nflavours >= cmd->nflavours)
3361 return FALSE;
3362
3363 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0
3364 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3365 return FALSE;
3366
3367 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour);
3368 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw);
3369 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4;
3370 offset += cmd->flavours[nflavours].size + sizeof (raw);
3371 nflavours++;
3372 }
3373
3374 for (i = 0; i < nflavours; i++)
3375 {
3376 asection *bfdsec;
3377 unsigned int snamelen;
3378 char *sname;
3379 const char *flavourstr;
3380 const char *prefix = "LC_THREAD";
3381 unsigned int j = 0;
3382
3383 switch (mdata->header.cputype)
3384 {
3385 case BFD_MACH_O_CPU_TYPE_POWERPC:
3386 case BFD_MACH_O_CPU_TYPE_POWERPC_64:
3387 flavourstr =
3388 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
3389 break;
3390 case BFD_MACH_O_CPU_TYPE_I386:
3391 case BFD_MACH_O_CPU_TYPE_X86_64:
3392 flavourstr =
3393 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
3394 break;
3395 default:
3396 flavourstr = "UNKNOWN_ARCHITECTURE";
3397 break;
3398 }
3399
3400 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
3401 sname = bfd_alloc (abfd, snamelen);
3402 if (sname == NULL)
3403 return FALSE;
3404
3405 for (;;)
3406 {
3407 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j);
3408 if (bfd_get_section_by_name (abfd, sname) == NULL)
3409 break;
3410 j++;
3411 }
3412
3413 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS);
3414
3415 bfdsec->vma = 0;
3416 bfdsec->lma = 0;
3417 bfdsec->size = cmd->flavours[i].size;
3418 bfdsec->filepos = cmd->flavours[i].offset;
3419 bfdsec->alignment_power = 0x0;
3420
3421 cmd->section = bfdsec;
3422 }
3423
3424 return TRUE;
3425 }
3426
3427 static bfd_boolean
3428 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
3429 {
3430 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
3431 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3432
3433 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
3434
3435 {
3436 struct mach_o_dysymtab_command_external raw;
3437
3438 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3439 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3440 return FALSE;
3441
3442 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym);
3443 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym);
3444 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym);
3445 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym);
3446 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym);
3447 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym);
3448 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff);
3449 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc);
3450 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff);
3451 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab);
3452 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff);
3453 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms);
3454 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff);
3455 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms);
3456 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff);
3457 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel);
3458 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff);
3459 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel);
3460 }
3461
3462 if (cmd->nmodtab != 0)
3463 {
3464 unsigned int i;
3465 int wide = bfd_mach_o_wide_p (abfd);
3466 unsigned int module_len = wide ? 56 : 52;
3467
3468 cmd->dylib_module =
3469 bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module));
3470 if (cmd->dylib_module == NULL)
3471 return FALSE;
3472
3473 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
3474 return FALSE;
3475
3476 for (i = 0; i < cmd->nmodtab; i++)
3477 {
3478 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
3479 unsigned long v;
3480 unsigned char buf[56];
3481
3482 if (bfd_bread ((void *) buf, module_len, abfd) != module_len)
3483 return FALSE;
3484
3485 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0);
3486 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4);
3487 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8);
3488 module->irefsym = bfd_h_get_32 (abfd, buf + 12);
3489 module->nrefsym = bfd_h_get_32 (abfd, buf + 16);
3490 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20);
3491 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24);
3492 module->iextrel = bfd_h_get_32 (abfd, buf + 28);
3493 module->nextrel = bfd_h_get_32 (abfd, buf + 32);
3494 v = bfd_h_get_32 (abfd, buf +36);
3495 module->iinit = v & 0xffff;
3496 module->iterm = (v >> 16) & 0xffff;
3497 v = bfd_h_get_32 (abfd, buf + 40);
3498 module->ninit = v & 0xffff;
3499 module->nterm = (v >> 16) & 0xffff;
3500 if (wide)
3501 {
3502 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44);
3503 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48);
3504 }
3505 else
3506 {
3507 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44);
3508 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48);
3509 }
3510 }
3511 }
3512
3513 if (cmd->ntoc != 0)
3514 {
3515 unsigned int i;
3516
3517 cmd->dylib_toc = bfd_alloc
3518 (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content));
3519 if (cmd->dylib_toc == NULL)
3520 return FALSE;
3521
3522 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
3523 return FALSE;
3524
3525 for (i = 0; i < cmd->ntoc; i++)
3526 {
3527 struct mach_o_dylib_table_of_contents_external raw;
3528 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
3529
3530 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3531 return FALSE;
3532
3533 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index);
3534 toc->module_index = bfd_h_get_32 (abfd, raw.module_index);
3535 }
3536 }
3537
3538 if (cmd->nindirectsyms != 0)
3539 {
3540 unsigned int i;
3541
3542 cmd->indirect_syms = bfd_alloc
3543 (abfd, cmd->nindirectsyms * sizeof (unsigned int));
3544 if (cmd->indirect_syms == NULL)
3545 return FALSE;
3546
3547 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
3548 return FALSE;
3549
3550 for (i = 0; i < cmd->nindirectsyms; i++)
3551 {
3552 unsigned char raw[4];
3553 unsigned int *is = &cmd->indirect_syms[i];
3554
3555 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3556 return FALSE;
3557
3558 *is = bfd_h_get_32 (abfd, raw);
3559 }
3560 }
3561
3562 if (cmd->nextrefsyms != 0)
3563 {
3564 unsigned long v;
3565 unsigned int i;
3566
3567 cmd->ext_refs = bfd_alloc
3568 (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference));
3569 if (cmd->ext_refs == NULL)
3570 return FALSE;
3571
3572 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
3573 return FALSE;
3574
3575 for (i = 0; i < cmd->nextrefsyms; i++)
3576 {
3577 unsigned char raw[4];
3578 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
3579
3580 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw))
3581 return FALSE;
3582
3583 /* Fields isym and flags are written as bit-fields, thus we need
3584 a specific processing for endianness. */
3585 v = bfd_h_get_32 (abfd, raw);
3586 if (bfd_big_endian (abfd))
3587 {
3588 ref->isym = (v >> 8) & 0xffffff;
3589 ref->flags = v & 0xff;
3590 }
3591 else
3592 {
3593 ref->isym = v & 0xffffff;
3594 ref->flags = (v >> 24) & 0xff;
3595 }
3596 }
3597 }
3598
3599 if (mdata->dysymtab)
3600 return FALSE;
3601 mdata->dysymtab = cmd;
3602
3603 return TRUE;
3604 }
3605
3606 static bfd_boolean
3607 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command)
3608 {
3609 bfd_mach_o_symtab_command *symtab = &command->command.symtab;
3610 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
3611 struct mach_o_symtab_command_external raw;
3612
3613 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
3614
3615 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3616 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3617 return FALSE;
3618
3619 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff);
3620 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms);
3621 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff);
3622 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize);
3623 symtab->symbols = NULL;
3624 symtab->strtab = NULL;
3625
3626 if (symtab->nsyms != 0)
3627 abfd->flags |= HAS_SYMS;
3628
3629 if (mdata->symtab)
3630 return FALSE;
3631 mdata->symtab = symtab;
3632 return TRUE;
3633 }
3634
3635 static bfd_boolean
3636 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command)
3637 {
3638 bfd_mach_o_uuid_command *cmd = &command->command.uuid;
3639
3640 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID);
3641
3642 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3643 || bfd_bread (cmd->uuid, 16, abfd) != 16)
3644 return FALSE;
3645
3646 return TRUE;
3647 }
3648
3649 static bfd_boolean
3650 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command)
3651 {
3652 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit;
3653 struct mach_o_linkedit_data_command_external raw;
3654
3655 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3656 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3657 return FALSE;
3658
3659 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff);
3660 cmd->datasize = bfd_get_32 (abfd, raw.datasize);
3661 return TRUE;
3662 }
3663
3664 static bfd_boolean
3665 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command)
3666 {
3667 bfd_mach_o_str_command *cmd = &command->command.str;
3668 struct mach_o_str_command_external raw;
3669 unsigned long off;
3670
3671 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3672 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3673 return FALSE;
3674
3675 off = bfd_get_32 (abfd, raw.str);
3676 cmd->stroff = command->offset + off;
3677 cmd->str_len = command->len - off;
3678 cmd->str = bfd_alloc (abfd, cmd->str_len);
3679 if (cmd->str == NULL)
3680 return FALSE;
3681 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0
3682 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len)
3683 return FALSE;
3684 return TRUE;
3685 }
3686
3687 static bfd_boolean
3688 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command)
3689 {
3690 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info;
3691 struct mach_o_dyld_info_command_external raw;
3692
3693 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3694 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3695 return FALSE;
3696
3697 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off);
3698 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size);
3699 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off);
3700 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size);
3701 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off);
3702 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size);
3703 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off);
3704 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size);
3705 cmd->export_off = bfd_get_32 (abfd, raw.export_off);
3706 cmd->export_size = bfd_get_32 (abfd, raw.export_size);
3707 return TRUE;
3708 }
3709
3710 static bfd_boolean
3711 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command)
3712 {
3713 bfd_mach_o_version_min_command *cmd = &command->command.version_min;
3714 struct mach_o_version_min_command_external raw;
3715 unsigned int ver;
3716
3717 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3718 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3719 return FALSE;
3720
3721 ver = bfd_get_32 (abfd, raw.version);
3722 cmd->rel = ver >> 16;
3723 cmd->maj = ver >> 8;
3724 cmd->min = ver;
3725 cmd->reserved = bfd_get_32 (abfd, raw.reserved);
3726 return TRUE;
3727 }
3728
3729 static bfd_boolean
3730 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
3731 {
3732 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
3733 struct mach_o_encryption_info_command_external raw;
3734
3735 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3736 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3737 return FALSE;
3738
3739 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
3740 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
3741 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
3742 return TRUE;
3743 }
3744
3745 static bfd_boolean
3746 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
3747 {
3748 bfd_mach_o_main_command *cmd = &command->command.main;
3749 struct mach_o_entry_point_command_external raw;
3750
3751 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3752 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3753 return FALSE;
3754
3755 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
3756 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
3757 return TRUE;
3758 }
3759
3760 static bfd_boolean
3761 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
3762 {
3763 bfd_mach_o_source_version_command *cmd = &command->command.source_version;
3764 struct mach_o_source_version_command_external raw;
3765 bfd_uint64_t ver;
3766
3767 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3768 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3769 return FALSE;
3770
3771 ver = bfd_get_64 (abfd, raw.version);
3772 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
3773 generates warnings) in case of the host doesn't support 64 bit
3774 integers. */
3775 cmd->e = ver & 0x3ff;
3776 ver >>= 10;
3777 cmd->d = ver & 0x3ff;
3778 ver >>= 10;
3779 cmd->c = ver & 0x3ff;
3780 ver >>= 10;
3781 cmd->b = ver & 0x3ff;
3782 ver >>= 10;
3783 cmd->a = ver & 0xffffff;
3784 return TRUE;
3785 }
3786
3787 static bfd_boolean
3788 bfd_mach_o_read_segment (bfd *abfd,
3789 bfd_mach_o_load_command *command,
3790 unsigned int wide)
3791 {
3792 bfd_mach_o_segment_command *seg = &command->command.segment;
3793 unsigned long i;
3794
3795 if (wide)
3796 {
3797 struct mach_o_segment_command_64_external raw;
3798
3799 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
3800
3801 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3802 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3803 return FALSE;
3804
3805 memcpy (seg->segname, raw.segname, 16);
3806 seg->segname[16] = '\0';
3807
3808 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr);
3809 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize);
3810 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff);
3811 seg->filesize = bfd_h_get_64 (abfd, raw.filesize);
3812 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3813 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3814 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3815 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3816 }
3817 else
3818 {
3819 struct mach_o_segment_command_32_external raw;
3820
3821 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
3822
3823 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
3824 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
3825 return FALSE;
3826
3827 memcpy (seg->segname, raw.segname, 16);
3828 seg->segname[16] = '\0';
3829
3830 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr);
3831 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize);
3832 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff);
3833 seg->filesize = bfd_h_get_32 (abfd, raw.filesize);
3834 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot);
3835 seg->initprot = bfd_h_get_32 (abfd, raw.initprot);
3836 seg->nsects = bfd_h_get_32 (abfd, raw.nsects);
3837 seg->flags = bfd_h_get_32 (abfd, raw.flags);
3838 }
3839 seg->sect_head = NULL;
3840 seg->sect_tail = NULL;
3841
3842 for (i = 0; i < seg->nsects; i++)
3843 {
3844 bfd_vma segoff;
3845 asection *sec;
3846
3847 if (wide)
3848 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
3849 + (i * BFD_MACH_O_SECTION_64_SIZE);
3850 else
3851 segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
3852 + (i * BFD_MACH_O_SECTION_SIZE);
3853
3854 sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide);
3855 if (sec == NULL)
3856 return FALSE;
3857
3858 bfd_mach_o_append_section_to_segment (seg, sec);
3859 }
3860
3861 return TRUE;
3862 }
3863
3864 static bfd_boolean
3865 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
3866 {
3867 return bfd_mach_o_read_segment (abfd, command, 0);
3868 }
3869
3870 static bfd_boolean
3871 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
3872 {
3873 return bfd_mach_o_read_segment (abfd, command, 1);
3874 }
3875
3876 static bfd_boolean
3877 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command)
3878 {
3879 struct mach_o_load_command_external raw;
3880 unsigned int cmd;
3881
3882 /* Read command type and length. */
3883 if (bfd_seek (abfd, command->offset, SEEK_SET) != 0
3884 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE)
3885 return FALSE;
3886
3887 cmd = bfd_h_get_32 (abfd, raw.cmd);
3888 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD;
3889 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE;
3890 command->len = bfd_h_get_32 (abfd, raw.cmdsize);
3891
3892 switch (command->type)
3893 {
3894 case BFD_MACH_O_LC_SEGMENT:
3895 if (!bfd_mach_o_read_segment_32 (abfd, command))
3896 return FALSE;
3897 break;
3898 case BFD_MACH_O_LC_SEGMENT_64:
3899 if (!bfd_mach_o_read_segment_64 (abfd, command))
3900 return FALSE;
3901 break;
3902 case BFD_MACH_O_LC_SYMTAB:
3903 if (!bfd_mach_o_read_symtab (abfd, command))
3904 return FALSE;
3905 break;
3906 case BFD_MACH_O_LC_SYMSEG:
3907 break;
3908 case BFD_MACH_O_LC_THREAD:
3909 case BFD_MACH_O_LC_UNIXTHREAD:
3910 if (!bfd_mach_o_read_thread (abfd, command))
3911 return FALSE;
3912 break;
3913 case BFD_MACH_O_LC_LOAD_DYLINKER:
3914 case BFD_MACH_O_LC_ID_DYLINKER:
3915 case BFD_MACH_O_LC_DYLD_ENVIRONMENT:
3916 if (!bfd_mach_o_read_dylinker (abfd, command))
3917 return FALSE;
3918 break;
3919 case BFD_MACH_O_LC_LOAD_DYLIB:
3920 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB:
3921 case BFD_MACH_O_LC_ID_DYLIB:
3922 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
3923 case BFD_MACH_O_LC_REEXPORT_DYLIB:
3924 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB:
3925 if (!bfd_mach_o_read_dylib (abfd, command))
3926 return FALSE;
3927 break;
3928 case BFD_MACH_O_LC_PREBOUND_DYLIB:
3929 if (!bfd_mach_o_read_prebound_dylib (abfd, command))
3930 return FALSE;
3931 break;
3932 case BFD_MACH_O_LC_LOADFVMLIB:
3933 case BFD_MACH_O_LC_IDFVMLIB:
3934 if (!bfd_mach_o_read_fvmlib (abfd, command))
3935 return FALSE;
3936 break;
3937 case BFD_MACH_O_LC_IDENT:
3938 case BFD_MACH_O_LC_FVMFILE:
3939 case BFD_MACH_O_LC_PREPAGE:
3940 case BFD_MACH_O_LC_ROUTINES:
3941 case BFD_MACH_O_LC_ROUTINES_64:
3942 break;
3943 case BFD_MACH_O_LC_SUB_FRAMEWORK:
3944 case BFD_MACH_O_LC_SUB_UMBRELLA:
3945 case BFD_MACH_O_LC_SUB_LIBRARY:
3946 case BFD_MACH_O_LC_SUB_CLIENT:
3947 case BFD_MACH_O_LC_RPATH:
3948 if (!bfd_mach_o_read_str (abfd, command))
3949 return FALSE;
3950 break;
3951 case BFD_MACH_O_LC_DYSYMTAB:
3952 if (!bfd_mach_o_read_dysymtab (abfd, command))
3953 return FALSE;
3954 break;
3955 case BFD_MACH_O_LC_PREBIND_CKSUM:
3956 if (!bfd_mach_o_read_prebind_cksum (abfd, command))
3957 return FALSE;
3958 break;
3959 case BFD_MACH_O_LC_TWOLEVEL_HINTS:
3960 if (!bfd_mach_o_read_twolevel_hints (abfd, command))
3961 return FALSE;
3962 break;
3963 case BFD_MACH_O_LC_UUID:
3964 if (!bfd_mach_o_read_uuid (abfd, command))
3965 return FALSE;
3966 break;
3967 case BFD_MACH_O_LC_CODE_SIGNATURE:
3968 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
3969 case BFD_MACH_O_LC_FUNCTION_STARTS:
3970 case BFD_MACH_O_LC_DATA_IN_CODE:
3971 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
3972 if (!bfd_mach_o_read_linkedit (abfd, command))
3973 return FALSE;
3974 break;
3975 case BFD_MACH_O_LC_ENCRYPTION_INFO:
3976 if (!bfd_mach_o_read_encryption_info (abfd, command))
3977 return FALSE;
3978 break;
3979 case BFD_MACH_O_LC_DYLD_INFO:
3980 if (!bfd_mach_o_read_dyld_info (abfd, command))
3981 return FALSE;
3982 break;
3983 case BFD_MACH_O_LC_VERSION_MIN_MACOSX:
3984 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS:
3985 if (!bfd_mach_o_read_version_min (abfd, command))
3986 return FALSE;
3987 break;
3988 case BFD_MACH_O_LC_MAIN:
3989 if (!bfd_mach_o_read_main (abfd, command))
3990 return FALSE;
3991 break;
3992 case BFD_MACH_O_LC_SOURCE_VERSION:
3993 if (!bfd_mach_o_read_source_version (abfd, command))
3994 return FALSE;
3995 break;
3996 default:
3997 (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
3998 abfd, (unsigned long) command->type);
3999 break;
4000 }
4001
4002 return TRUE;
4003 }
4004
4005 static void
4006 bfd_mach_o_flatten_sections (bfd *abfd)
4007 {
4008 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4009 long csect = 0;
4010 unsigned long i;
4011
4012 /* Count total number of sections. */
4013 mdata->nsects = 0;
4014
4015 for (i = 0; i < mdata->header.ncmds; i++)
4016 {
4017 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
4018 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
4019 {
4020 bfd_mach_o_segment_command *seg;
4021
4022 seg = &mdata->commands[i].command.segment;
4023 mdata->nsects += seg->nsects;
4024 }
4025 }
4026
4027 /* Allocate sections array. */
4028 mdata->sections = bfd_alloc (abfd,
4029 mdata->nsects * sizeof (bfd_mach_o_section *));
4030
4031 /* Fill the array. */
4032 csect = 0;
4033
4034 for (i = 0; i < mdata->header.ncmds; i++)
4035 {
4036 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT
4037 || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64)
4038 {
4039 bfd_mach_o_segment_command *seg;
4040 bfd_mach_o_section *sec;
4041
4042 seg = &mdata->commands[i].command.segment;
4043 BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
4044
4045 for (sec = seg->sect_head; sec != NULL; sec = sec->next)
4046 mdata->sections[csect++] = sec;
4047 }
4048 }
4049 }
4050
4051 static bfd_boolean
4052 bfd_mach_o_scan_start_address (bfd *abfd)
4053 {
4054 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4055 bfd_mach_o_thread_command *cmd = NULL;
4056 unsigned long i;
4057
4058 for (i = 0; i < mdata->header.ncmds; i++)
4059 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
4060 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
4061 {
4062 cmd = &mdata->commands[i].command.thread;
4063 break;
4064 }
4065 else if (mdata->commands[i].type == BFD_MACH_O_LC_MAIN
4066 && mdata->nsects > 1)
4067 {
4068 bfd_mach_o_main_command *main_cmd = &mdata->commands[i].command.main;
4069 bfd_mach_o_section *text_sect = mdata->sections[0];
4070 if (text_sect)
4071 {
4072 abfd->start_address = main_cmd->entryoff
4073 + (text_sect->addr - text_sect->offset);
4074 return TRUE;
4075 }
4076 }
4077
4078 /* An object file has no start address, so do not fail if not found. */
4079 if (cmd == NULL)
4080 return TRUE;
4081
4082 /* FIXME: create a subtarget hook ? */
4083 for (i = 0; i < cmd->nflavours; i++)
4084 {
4085 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
4086 && (cmd->flavours[i].flavour
4087 == (unsigned long) BFD_MACH_O_x86_THREAD_STATE32))
4088 {
4089 unsigned char buf[4];
4090
4091 if (bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET) != 0
4092 || bfd_bread (buf, 4, abfd) != 4)
4093 return FALSE;
4094
4095 abfd->start_address = bfd_h_get_32 (abfd, buf);
4096 }
4097 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
4098 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
4099 {
4100 unsigned char buf[4];
4101
4102 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
4103 || bfd_bread (buf, 4, abfd) != 4)
4104 return FALSE;
4105
4106 abfd->start_address = bfd_h_get_32 (abfd, buf);
4107 }
4108 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64)
4109 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64))
4110 {
4111 unsigned char buf[8];
4112
4113 if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0
4114 || bfd_bread (buf, 8, abfd) != 8)
4115 return FALSE;
4116
4117 abfd->start_address = bfd_h_get_64 (abfd, buf);
4118 }
4119 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64)
4120 && (cmd->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64))
4121 {
4122 unsigned char buf[8];
4123
4124 if (bfd_seek (abfd, cmd->flavours[i].offset + (16 * 8), SEEK_SET) != 0
4125 || bfd_bread (buf, 8, abfd) != 8)
4126 return FALSE;
4127
4128 abfd->start_address = bfd_h_get_64 (abfd, buf);
4129 }
4130 }
4131
4132 return TRUE;
4133 }
4134
4135 bfd_boolean
4136 bfd_mach_o_set_arch_mach (bfd *abfd,
4137 enum bfd_architecture arch,
4138 unsigned long machine)
4139 {
4140 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4141
4142 /* If this isn't the right architecture for this backend, and this
4143 isn't the generic backend, fail. */
4144 if (arch != bed->arch
4145 && arch != bfd_arch_unknown
4146 && bed->arch != bfd_arch_unknown)
4147 return FALSE;
4148
4149 return bfd_default_set_arch_mach (abfd, arch, machine);
4150 }
4151
4152 static bfd_boolean
4153 bfd_mach_o_scan (bfd *abfd,
4154 bfd_mach_o_header *header,
4155 bfd_mach_o_data_struct *mdata)
4156 {
4157 unsigned int i;
4158 enum bfd_architecture cputype;
4159 unsigned long cpusubtype;
4160 unsigned int hdrsize;
4161
4162 hdrsize = mach_o_wide_p (header) ?
4163 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
4164
4165 mdata->header = *header;
4166
4167 abfd->flags = abfd->flags & BFD_IN_MEMORY;
4168 switch (header->filetype)
4169 {
4170 case BFD_MACH_O_MH_OBJECT:
4171 abfd->flags |= HAS_RELOC;
4172 break;
4173 case BFD_MACH_O_MH_EXECUTE:
4174 abfd->flags |= EXEC_P;
4175 break;
4176 case BFD_MACH_O_MH_DYLIB:
4177 case BFD_MACH_O_MH_BUNDLE:
4178 abfd->flags |= DYNAMIC;
4179 break;
4180 }
4181
4182 abfd->tdata.mach_o_data = mdata;
4183
4184 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype,
4185 &cputype, &cpusubtype);
4186 if (cputype == bfd_arch_unknown)
4187 {
4188 (*_bfd_error_handler)
4189 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"),
4190 header->cputype, header->cpusubtype);
4191 return FALSE;
4192 }
4193
4194 bfd_set_arch_mach (abfd, cputype, cpusubtype);
4195
4196 if (header->ncmds != 0)
4197 {
4198 mdata->commands = bfd_alloc
4199 (abfd, header->ncmds * sizeof (bfd_mach_o_load_command));
4200 if (mdata->commands == NULL)
4201 return FALSE;
4202
4203 for (i = 0; i < header->ncmds; i++)
4204 {
4205 bfd_mach_o_load_command *cur = &mdata->commands[i];
4206
4207 if (i == 0)
4208 cur->offset = hdrsize;
4209 else
4210 {
4211 bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
4212 cur->offset = prev->offset + prev->len;
4213 }
4214
4215 if (!bfd_mach_o_read_command (abfd, cur))
4216 return FALSE;
4217 }
4218 }
4219
4220 /* Sections should be flatten before scanning start address. */
4221 bfd_mach_o_flatten_sections (abfd);
4222 if (!bfd_mach_o_scan_start_address (abfd))
4223 return FALSE;
4224
4225 return TRUE;
4226 }
4227
4228 bfd_boolean
4229 bfd_mach_o_mkobject_init (bfd *abfd)
4230 {
4231 bfd_mach_o_data_struct *mdata = NULL;
4232
4233 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct));
4234 if (mdata == NULL)
4235 return FALSE;
4236 abfd->tdata.mach_o_data = mdata;
4237
4238 mdata->header.magic = 0;
4239 mdata->header.cputype = 0;
4240 mdata->header.cpusubtype = 0;
4241 mdata->header.filetype = 0;
4242 mdata->header.ncmds = 0;
4243 mdata->header.sizeofcmds = 0;
4244 mdata->header.flags = 0;
4245 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
4246 mdata->commands = NULL;
4247 mdata->nsects = 0;
4248 mdata->sections = NULL;
4249 mdata->dyn_reloc_cache = NULL;
4250
4251 return TRUE;
4252 }
4253
4254 static bfd_boolean
4255 bfd_mach_o_gen_mkobject (bfd *abfd)
4256 {
4257 bfd_mach_o_data_struct *mdata;
4258
4259 if (!bfd_mach_o_mkobject_init (abfd))
4260 return FALSE;
4261
4262 mdata = bfd_mach_o_get_data (abfd);
4263 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
4264 mdata->header.cputype = 0;
4265 mdata->header.cpusubtype = 0;
4266 mdata->header.byteorder = abfd->xvec->byteorder;
4267 mdata->header.version = 1;
4268
4269 return TRUE;
4270 }
4271
4272 const bfd_target *
4273 bfd_mach_o_header_p (bfd *abfd,
4274 bfd_mach_o_filetype filetype,
4275 bfd_mach_o_cpu_type cputype)
4276 {
4277 bfd_mach_o_header header;
4278 bfd_mach_o_data_struct *mdata;
4279
4280 if (!bfd_mach_o_read_header (abfd, &header))
4281 goto wrong;
4282
4283 if (! (header.byteorder == BFD_ENDIAN_BIG
4284 || header.byteorder == BFD_ENDIAN_LITTLE))
4285 {
4286 (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"),
4287 (unsigned long) header.byteorder);
4288 goto wrong;
4289 }
4290
4291 if (! ((header.byteorder == BFD_ENDIAN_BIG
4292 && abfd->xvec->byteorder == BFD_ENDIAN_BIG
4293 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG)
4294 || (header.byteorder == BFD_ENDIAN_LITTLE
4295 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE
4296 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE)))
4297 goto wrong;
4298
4299 /* Check cputype and filetype.
4300 In case of wildcard, do not accept magics that are handled by existing
4301 targets. */
4302 if (cputype)
4303 {
4304 if (header.cputype != cputype)
4305 goto wrong;
4306 }
4307 else
4308 {
4309 #ifndef BFD64
4310 /* Do not recognize 64 architectures if not configured for 64bit targets.
4311 This could happen only for generic targets. */
4312 if (mach_o_wide_p (&header))
4313 goto wrong;
4314 #endif
4315 }
4316
4317 if (filetype)
4318 {
4319 if (header.filetype != filetype)
4320 goto wrong;
4321 }
4322 else
4323 {
4324 switch (header.filetype)
4325 {
4326 case BFD_MACH_O_MH_CORE:
4327 /* Handled by core_p */
4328 goto wrong;
4329 default:
4330 break;
4331 }
4332 }
4333
4334 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
4335 if (mdata == NULL)
4336 goto fail;
4337
4338 if (!bfd_mach_o_scan (abfd, &header, mdata))
4339 goto wrong;
4340
4341 return abfd->xvec;
4342
4343 wrong:
4344 bfd_set_error (bfd_error_wrong_format);
4345
4346 fail:
4347 return NULL;
4348 }
4349
4350 static const bfd_target *
4351 bfd_mach_o_gen_object_p (bfd *abfd)
4352 {
4353 return bfd_mach_o_header_p (abfd, 0, 0);
4354 }
4355
4356 static const bfd_target *
4357 bfd_mach_o_gen_core_p (bfd *abfd)
4358 {
4359 return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0);
4360 }
4361
4362 /* Return the base address of ABFD, ie the address at which the image is
4363 mapped. The possible initial pagezero is ignored. */
4364
4365 bfd_vma
4366 bfd_mach_o_get_base_address (bfd *abfd)
4367 {
4368 bfd_mach_o_data_struct *mdata;
4369 unsigned int i;
4370
4371 /* Check for Mach-O. */
4372 if (!bfd_mach_o_valid (abfd))
4373 return 0;
4374 mdata = bfd_mach_o_get_data (abfd);
4375
4376 for (i = 0; i < mdata->header.ncmds; i++)
4377 {
4378 bfd_mach_o_load_command *cmd = &mdata->commands[i];
4379 if ((cmd->type == BFD_MACH_O_LC_SEGMENT
4380 || cmd->type == BFD_MACH_O_LC_SEGMENT_64))
4381 {
4382 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment;
4383
4384 if (segcmd->initprot != 0)
4385 return segcmd->vmaddr;
4386 }
4387 }
4388 return 0;
4389 }
4390
4391 typedef struct mach_o_fat_archentry
4392 {
4393 unsigned long cputype;
4394 unsigned long cpusubtype;
4395 unsigned long offset;
4396 unsigned long size;
4397 unsigned long align;
4398 } mach_o_fat_archentry;
4399
4400 typedef struct mach_o_fat_data_struct
4401 {
4402 unsigned long magic;
4403 unsigned long nfat_arch;
4404 mach_o_fat_archentry *archentries;
4405 } mach_o_fat_data_struct;
4406
4407 const bfd_target *
4408 bfd_mach_o_archive_p (bfd *abfd)
4409 {
4410 mach_o_fat_data_struct *adata = NULL;
4411 struct mach_o_fat_header_external hdr;
4412 unsigned long i;
4413
4414 if (bfd_seek (abfd, 0, SEEK_SET) != 0
4415 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
4416 goto error;
4417
4418 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
4419 if (adata == NULL)
4420 goto error;
4421
4422 adata->magic = bfd_getb32 (hdr.magic);
4423 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch);
4424 if (adata->magic != 0xcafebabe)
4425 goto error;
4426 /* Avoid matching Java bytecode files, which have the same magic number.
4427 In the Java bytecode file format this field contains the JVM version,
4428 which starts at 43.0. */
4429 if (adata->nfat_arch > 30)
4430 goto error;
4431
4432 adata->archentries =
4433 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
4434 if (adata->archentries == NULL)
4435 goto error;
4436
4437 for (i = 0; i < adata->nfat_arch; i++)
4438 {
4439 struct mach_o_fat_arch_external arch;
4440 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch))
4441 goto error;
4442 adata->archentries[i].cputype = bfd_getb32 (arch.cputype);
4443 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype);
4444 adata->archentries[i].offset = bfd_getb32 (arch.offset);
4445 adata->archentries[i].size = bfd_getb32 (arch.size);
4446 adata->archentries[i].align = bfd_getb32 (arch.align);
4447 }
4448
4449 abfd->tdata.mach_o_fat_data = adata;
4450 return abfd->xvec;
4451
4452 error:
4453 if (adata != NULL)
4454 bfd_release (abfd, adata);
4455 bfd_set_error (bfd_error_wrong_format);
4456 return NULL;
4457 }
4458
4459 /* Set the filename for a fat binary member ABFD, whose bfd architecture is
4460 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
4461 Set arelt_data and origin fields too. */
4462
4463 static void
4464 bfd_mach_o_fat_member_init (bfd *abfd,
4465 enum bfd_architecture arch_type,
4466 unsigned long arch_subtype,
4467 mach_o_fat_archentry *entry)
4468 {
4469 struct areltdata *areltdata;
4470 /* Create the member filename. Use ARCH_NAME. */
4471 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
4472
4473 if (ap)
4474 {
4475 /* Use the architecture name if known. */
4476 abfd->filename = xstrdup (ap->printable_name);
4477 }
4478 else
4479 {
4480 /* Forge a uniq id. */
4481 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
4482 char *name = xmalloc (namelen);
4483 snprintf (name, namelen, "0x%lx-0x%lx",
4484 entry->cputype, entry->cpusubtype);
4485 abfd->filename = name;
4486 }
4487
4488 areltdata = bfd_zmalloc (sizeof (struct areltdata));
4489 areltdata->parsed_size = entry->size;
4490 abfd->arelt_data = areltdata;
4491 abfd->iostream = NULL;
4492 abfd->origin = entry->offset;
4493 }
4494
4495 bfd *
4496 bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
4497 {
4498 mach_o_fat_data_struct *adata;
4499 mach_o_fat_archentry *entry = NULL;
4500 unsigned long i;
4501 bfd *nbfd;
4502 enum bfd_architecture arch_type;
4503 unsigned long arch_subtype;
4504
4505 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
4506 BFD_ASSERT (adata != NULL);
4507
4508 /* Find index of previous entry. */
4509 if (prev == NULL)
4510 {
4511 /* Start at first one. */
4512 i = 0;
4513 }
4514 else
4515 {
4516 /* Find index of PREV. */
4517 for (i = 0; i < adata->nfat_arch; i++)
4518 {
4519 if (adata->archentries[i].offset == prev->origin)
4520 break;
4521 }
4522
4523 if (i == adata->nfat_arch)
4524 {
4525 /* Not found. */
4526 bfd_set_error (bfd_error_bad_value);
4527 return NULL;
4528 }
4529
4530 /* Get next entry. */
4531 i++;
4532 }
4533
4534 if (i >= adata->nfat_arch)
4535 {
4536 bfd_set_error (bfd_error_no_more_archived_files);
4537 return NULL;
4538 }
4539
4540 entry = &adata->archentries[i];
4541 nbfd = _bfd_new_bfd_contained_in (archive);
4542 if (nbfd == NULL)
4543 return NULL;
4544
4545 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
4546 &arch_type, &arch_subtype);
4547
4548 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
4549
4550 bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
4551
4552 return nbfd;
4553 }
4554
4555 /* Analogous to stat call. */
4556
4557 static int
4558 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
4559 {
4560 if (abfd->arelt_data == NULL)
4561 {
4562 bfd_set_error (bfd_error_invalid_operation);
4563 return -1;
4564 }
4565
4566 buf->st_mtime = 0;
4567 buf->st_uid = 0;
4568 buf->st_gid = 0;
4569 buf->st_mode = 0644;
4570 buf->st_size = arelt_size (abfd);
4571
4572 return 0;
4573 }
4574
4575 /* If ABFD format is FORMAT and architecture is ARCH, return it.
4576 If ABFD is a fat image containing a member that corresponds to FORMAT
4577 and ARCH, returns it.
4578 In other case, returns NULL.
4579 This function allows transparent uses of fat images. */
4580
4581 bfd *
4582 bfd_mach_o_fat_extract (bfd *abfd,
4583 bfd_format format,
4584 const bfd_arch_info_type *arch)
4585 {
4586 bfd *res;
4587 mach_o_fat_data_struct *adata;
4588 unsigned int i;
4589
4590 if (bfd_check_format (abfd, format))
4591 {
4592 if (bfd_get_arch_info (abfd) == arch)
4593 return abfd;
4594 return NULL;
4595 }
4596 if (!bfd_check_format (abfd, bfd_archive)
4597 || abfd->xvec != &mach_o_fat_vec)
4598 return NULL;
4599
4600 /* This is a Mach-O fat image. */
4601 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data;
4602 BFD_ASSERT (adata != NULL);
4603
4604 for (i = 0; i < adata->nfat_arch; i++)
4605 {
4606 struct mach_o_fat_archentry *e = &adata->archentries[i];
4607 enum bfd_architecture cpu_type;
4608 unsigned long cpu_subtype;
4609
4610 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype,
4611 &cpu_type, &cpu_subtype);
4612 if (cpu_type != arch->arch || cpu_subtype != arch->mach)
4613 continue;
4614
4615 /* The architecture is found. */
4616 res = _bfd_new_bfd_contained_in (abfd);
4617 if (res == NULL)
4618 return NULL;
4619
4620 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
4621
4622 if (bfd_check_format (res, format))
4623 {
4624 BFD_ASSERT (bfd_get_arch_info (res) == arch);
4625 return res;
4626 }
4627 bfd_close (res);
4628 return NULL;
4629 }
4630
4631 return NULL;
4632 }
4633
4634 int
4635 bfd_mach_o_lookup_command (bfd *abfd,
4636 bfd_mach_o_load_command_type type,
4637 bfd_mach_o_load_command **mcommand)
4638 {
4639 struct mach_o_data_struct *md = bfd_mach_o_get_data (abfd);
4640 bfd_mach_o_load_command *ncmd = NULL;
4641 unsigned int i, num;
4642
4643 BFD_ASSERT (md != NULL);
4644 BFD_ASSERT (mcommand != NULL);
4645
4646 num = 0;
4647 for (i = 0; i < md->header.ncmds; i++)
4648 {
4649 struct bfd_mach_o_load_command *cmd = &md->commands[i];
4650
4651 if (cmd->type != type)
4652 continue;
4653
4654 if (num == 0)
4655 ncmd = cmd;
4656 num++;
4657 }
4658
4659 *mcommand = ncmd;
4660 return num;
4661 }
4662
4663 unsigned long
4664 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type)
4665 {
4666 switch (type)
4667 {
4668 case BFD_MACH_O_CPU_TYPE_MC680x0:
4669 return 0x04000000;
4670 case BFD_MACH_O_CPU_TYPE_MC88000:
4671 return 0xffffe000;
4672 case BFD_MACH_O_CPU_TYPE_POWERPC:
4673 return 0xc0000000;
4674 case BFD_MACH_O_CPU_TYPE_I386:
4675 return 0xc0000000;
4676 case BFD_MACH_O_CPU_TYPE_SPARC:
4677 return 0xf0000000;
4678 case BFD_MACH_O_CPU_TYPE_I860:
4679 return 0;
4680 case BFD_MACH_O_CPU_TYPE_HPPA:
4681 return 0xc0000000 - 0x04000000;
4682 default:
4683 return 0;
4684 }
4685 }
4686
4687 /* The following two tables should be kept, as far as possible, in order of
4688 most frequently used entries to optimize their use from gas. */
4689
4690 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
4691 {
4692 { "regular", BFD_MACH_O_S_REGULAR},
4693 { "coalesced", BFD_MACH_O_S_COALESCED},
4694 { "zerofill", BFD_MACH_O_S_ZEROFILL},
4695 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
4696 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
4697 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
4698 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
4699 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
4700 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
4701 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
4702 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
4703 { "interposing", BFD_MACH_O_S_INTERPOSING},
4704 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
4705 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
4706 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
4707 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
4708 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
4709 { NULL, 0}
4710 };
4711
4712 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
4713 {
4714 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
4715 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
4716 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
4717 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
4718 { "debug", BFD_MACH_O_S_ATTR_DEBUG },
4719 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
4720 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
4721 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
4722 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
4723 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4724 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
4725 { NULL, 0}
4726 };
4727
4728 /* Get the section type from NAME. Return 256 if NAME is unknown. */
4729
4730 unsigned int
4731 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
4732 {
4733 const bfd_mach_o_xlat_name *x;
4734 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
4735
4736 for (x = bfd_mach_o_section_type_name; x->name; x++)
4737 if (strcmp (x->name, name) == 0)
4738 {
4739 /* We found it... does the target support it? */
4740 if (bed->bfd_mach_o_section_type_valid_for_target == NULL
4741 || bed->bfd_mach_o_section_type_valid_for_target (x->val))
4742 return x->val; /* OK. */
4743 else
4744 break; /* Not supported. */
4745 }
4746 /* Maximum section ID = 0xff. */
4747 return 256;
4748 }
4749
4750 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */
4751
4752 unsigned int
4753 bfd_mach_o_get_section_attribute_from_name (const char *name)
4754 {
4755 const bfd_mach_o_xlat_name *x;
4756
4757 for (x = bfd_mach_o_section_attribute_name; x->name; x++)
4758 if (strcmp (x->name, name) == 0)
4759 return x->val;
4760 return (unsigned int)-1;
4761 }
4762
4763 int
4764 bfd_mach_o_core_fetch_environment (bfd *abfd,
4765 unsigned char **rbuf,
4766 unsigned int *rlen)
4767 {
4768 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4769 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
4770 unsigned int i = 0;
4771
4772 for (i = 0; i < mdata->header.ncmds; i++)
4773 {
4774 bfd_mach_o_load_command *cur = &mdata->commands[i];
4775 bfd_mach_o_segment_command *seg = NULL;
4776
4777 if (cur->type != BFD_MACH_O_LC_SEGMENT)
4778 continue;
4779
4780 seg = &cur->command.segment;
4781
4782 if ((seg->vmaddr + seg->vmsize) == stackaddr)
4783 {
4784 unsigned long start = seg->fileoff;
4785 unsigned long end = seg->fileoff + seg->filesize;
4786 unsigned char *buf = bfd_malloc (1024);
4787 unsigned long size = 1024;
4788
4789 for (;;)
4790 {
4791 bfd_size_type nread = 0;
4792 unsigned long offset;
4793 int found_nonnull = 0;
4794
4795 if (size > (end - start))
4796 size = (end - start);
4797
4798 buf = bfd_realloc_or_free (buf, size);
4799 if (buf == NULL)
4800 return -1;
4801
4802 if (bfd_seek (abfd, end - size, SEEK_SET) != 0)
4803 {
4804 free (buf);
4805 return -1;
4806 }
4807
4808 nread = bfd_bread (buf, size, abfd);
4809
4810 if (nread != size)
4811 {
4812 free (buf);
4813 return -1;
4814 }
4815
4816 for (offset = 4; offset <= size; offset += 4)
4817 {
4818 unsigned long val;
4819
4820 val = *((unsigned long *) (buf + size - offset));
4821 if (! found_nonnull)
4822 {
4823 if (val != 0)
4824 found_nonnull = 1;
4825 }
4826 else if (val == 0x0)
4827 {
4828 unsigned long bottom;
4829 unsigned long top;
4830
4831 bottom = seg->fileoff + seg->filesize - offset;
4832 top = seg->fileoff + seg->filesize - 4;
4833 *rbuf = bfd_malloc (top - bottom);
4834 *rlen = top - bottom;
4835
4836 memcpy (*rbuf, buf + size - *rlen, *rlen);
4837 free (buf);
4838 return 0;
4839 }
4840 }
4841
4842 if (size == (end - start))
4843 break;
4844
4845 size *= 2;
4846 }
4847
4848 free (buf);
4849 }
4850 }
4851
4852 return -1;
4853 }
4854
4855 char *
4856 bfd_mach_o_core_file_failing_command (bfd *abfd)
4857 {
4858 unsigned char *buf = NULL;
4859 unsigned int len = 0;
4860 int ret;
4861
4862 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
4863 if (ret < 0)
4864 return NULL;
4865
4866 return (char *) buf;
4867 }
4868
4869 int
4870 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
4871 {
4872 return 0;
4873 }
4874
4875 static bfd_mach_o_uuid_command *
4876 bfd_mach_o_lookup_uuid_command (bfd *abfd)
4877 {
4878 bfd_mach_o_load_command *uuid_cmd;
4879 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
4880 if (ncmd != 1)
4881 return FALSE;
4882 return &uuid_cmd->command.uuid;
4883 }
4884
4885 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
4886
4887 static bfd_boolean
4888 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
4889 {
4890 bfd_mach_o_uuid_command *dsym_uuid_cmd;
4891
4892 BFD_ASSERT (abfd);
4893 BFD_ASSERT (uuid_cmd);
4894
4895 if (!bfd_check_format (abfd, bfd_object))
4896 return FALSE;
4897
4898 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
4899 || bfd_mach_o_get_data (abfd) == NULL
4900 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
4901 return FALSE;
4902
4903 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4904 if (dsym_uuid_cmd == NULL)
4905 return FALSE;
4906
4907 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
4908 sizeof (uuid_cmd->uuid)) != 0)
4909 return FALSE;
4910
4911 return TRUE;
4912 }
4913
4914 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
4915 The caller is responsible for closing the returned BFD object and
4916 its my_archive if the returned BFD is in a fat dSYM. */
4917
4918 static bfd *
4919 bfd_mach_o_find_dsym (const char *dsym_filename,
4920 const bfd_mach_o_uuid_command *uuid_cmd,
4921 const bfd_arch_info_type *arch)
4922 {
4923 bfd *base_dsym_bfd, *dsym_bfd;
4924
4925 BFD_ASSERT (uuid_cmd);
4926
4927 base_dsym_bfd = bfd_openr (dsym_filename, NULL);
4928 if (base_dsym_bfd == NULL)
4929 return NULL;
4930
4931 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
4932 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
4933 return dsym_bfd;
4934
4935 bfd_close (dsym_bfd);
4936 if (base_dsym_bfd != dsym_bfd)
4937 bfd_close (base_dsym_bfd);
4938
4939 return NULL;
4940 }
4941
4942 /* Return a BFD created from a dSYM file for ABFD.
4943 The caller is responsible for closing the returned BFD object, its
4944 filename, and its my_archive if the returned BFD is in a fat dSYM. */
4945
4946 static bfd *
4947 bfd_mach_o_follow_dsym (bfd *abfd)
4948 {
4949 char *dsym_filename;
4950 bfd_mach_o_uuid_command *uuid_cmd;
4951 bfd *dsym_bfd, *base_bfd = abfd;
4952 const char *base_basename;
4953
4954 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
4955 return NULL;
4956
4957 if (abfd->my_archive)
4958 base_bfd = abfd->my_archive;
4959 /* BFD may have been opened from a stream. */
4960 if (base_bfd->filename == NULL)
4961 {
4962 bfd_set_error (bfd_error_invalid_operation);
4963 return NULL;
4964 }
4965 base_basename = lbasename (base_bfd->filename);
4966
4967 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
4968 if (uuid_cmd == NULL)
4969 return NULL;
4970
4971 /* TODO: We assume the DWARF file has the same as the binary's.
4972 It seems apple's GDB checks all files in the dSYM bundle directory.
4973 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
4974 */
4975 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
4976 + strlen (dsym_subdir) + 1
4977 + strlen (base_basename) + 1);
4978 sprintf (dsym_filename, "%s%s/%s",
4979 base_bfd->filename, dsym_subdir, base_basename);
4980
4981 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
4982 bfd_get_arch_info (abfd));
4983 if (dsym_bfd == NULL)
4984 free (dsym_filename);
4985
4986 return dsym_bfd;
4987 }
4988
4989 bfd_boolean
4990 bfd_mach_o_find_nearest_line (bfd *abfd,
4991 asection *section,
4992 asymbol **symbols,
4993 bfd_vma offset,
4994 const char **filename_ptr,
4995 const char **functionname_ptr,
4996 unsigned int *line_ptr)
4997 {
4998 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
4999 if (mdata == NULL)
5000 return FALSE;
5001 switch (mdata->header.filetype)
5002 {
5003 case BFD_MACH_O_MH_OBJECT:
5004 break;
5005 case BFD_MACH_O_MH_EXECUTE:
5006 case BFD_MACH_O_MH_DYLIB:
5007 case BFD_MACH_O_MH_BUNDLE:
5008 case BFD_MACH_O_MH_KEXT_BUNDLE:
5009 if (mdata->dwarf2_find_line_info == NULL)
5010 {
5011 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
5012 /* When we couldn't find dSYM for this binary, we look for
5013 the debug information in the binary itself. In this way,
5014 we won't try finding separated dSYM again because
5015 mdata->dwarf2_find_line_info will be filled. */
5016 if (! mdata->dsym_bfd)
5017 break;
5018 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
5019 dwarf_debug_sections, symbols,
5020 &mdata->dwarf2_find_line_info))
5021 return FALSE;
5022 }
5023 break;
5024 default:
5025 return FALSE;
5026 }
5027 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
5028 section, symbols, offset,
5029 filename_ptr, functionname_ptr,
5030 line_ptr, NULL, 0,
5031 &mdata->dwarf2_find_line_info))
5032 return TRUE;
5033 return FALSE;
5034 }
5035
5036 bfd_boolean
5037 bfd_mach_o_close_and_cleanup (bfd *abfd)
5038 {
5039 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5040 if (bfd_get_format (abfd) == bfd_object && mdata != NULL)
5041 {
5042 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
5043 bfd_mach_o_free_cached_info (abfd);
5044 if (mdata->dsym_bfd != NULL)
5045 {
5046 bfd *fat_bfd = mdata->dsym_bfd->my_archive;
5047 char *dsym_filename = (char *)(fat_bfd
5048 ? fat_bfd->filename
5049 : mdata->dsym_bfd->filename);
5050 bfd_close (mdata->dsym_bfd);
5051 mdata->dsym_bfd = NULL;
5052 if (fat_bfd)
5053 bfd_close (fat_bfd);
5054 free (dsym_filename);
5055 }
5056 }
5057
5058 if (bfd_get_format (abfd) == bfd_archive
5059 && abfd->xvec == &mach_o_fat_vec)
5060 return TRUE;
5061 return _bfd_generic_close_and_cleanup (abfd);
5062 }
5063
5064 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd)
5065 {
5066 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
5067 asection *asect;
5068 free (mdata->dyn_reloc_cache);
5069 mdata->dyn_reloc_cache = NULL;
5070 for (asect = abfd->sections; asect != NULL; asect = asect->next)
5071 {
5072 free (asect->relocation);
5073 asect->relocation = NULL;
5074 }
5075
5076 return TRUE;
5077 }
5078
5079 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
5080 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
5081
5082 #define bfd_mach_o_swap_reloc_in NULL
5083 #define bfd_mach_o_swap_reloc_out NULL
5084 #define bfd_mach_o_print_thread NULL
5085 #define bfd_mach_o_tgt_seg_table NULL
5086 #define bfd_mach_o_section_type_valid_for_tgt NULL
5087
5088 #define TARGET_NAME mach_o_be_vec
5089 #define TARGET_STRING "mach-o-be"
5090 #define TARGET_ARCHITECTURE bfd_arch_unknown
5091 #define TARGET_PAGESIZE 1
5092 #define TARGET_BIG_ENDIAN 1
5093 #define TARGET_ARCHIVE 0
5094 #define TARGET_PRIORITY 1
5095 #include "mach-o-target.c"
5096
5097 #undef TARGET_NAME
5098 #undef TARGET_STRING
5099 #undef TARGET_ARCHITECTURE
5100 #undef TARGET_PAGESIZE
5101 #undef TARGET_BIG_ENDIAN
5102 #undef TARGET_ARCHIVE
5103 #undef TARGET_PRIORITY
5104
5105 #define TARGET_NAME mach_o_le_vec
5106 #define TARGET_STRING "mach-o-le"
5107 #define TARGET_ARCHITECTURE bfd_arch_unknown
5108 #define TARGET_PAGESIZE 1
5109 #define TARGET_BIG_ENDIAN 0
5110 #define TARGET_ARCHIVE 0
5111 #define TARGET_PRIORITY 1
5112
5113 #include "mach-o-target.c"
5114
5115 #undef TARGET_NAME
5116 #undef TARGET_STRING
5117 #undef TARGET_ARCHITECTURE
5118 #undef TARGET_PAGESIZE
5119 #undef TARGET_BIG_ENDIAN
5120 #undef TARGET_ARCHIVE
5121 #undef TARGET_PRIORITY
5122
5123 /* Not yet handled: creating an archive. */
5124 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
5125
5126 /* Not used. */
5127 #define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
5128 #define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_ar_hdr
5129 #define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
5130 #define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
5131 #define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
5132 #define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
5133 #define bfd_mach_o_write_armap _bfd_noarchive_write_armap
5134 #define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
5135 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
5136 #define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
5137
5138 #define TARGET_NAME mach_o_fat_vec
5139 #define TARGET_STRING "mach-o-fat"
5140 #define TARGET_ARCHITECTURE bfd_arch_unknown
5141 #define TARGET_PAGESIZE 1
5142 #define TARGET_BIG_ENDIAN 1
5143 #define TARGET_ARCHIVE 1
5144 #define TARGET_PRIORITY 0
5145
5146 #include "mach-o-target.c"
5147
5148 #undef TARGET_NAME
5149 #undef TARGET_STRING
5150 #undef TARGET_ARCHITECTURE
5151 #undef TARGET_PAGESIZE
5152 #undef TARGET_BIG_ENDIAN
5153 #undef TARGET_ARCHIVE
5154 #undef TARGET_PRIORITY
GDB Binutils - Deliverables
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