Commit | Line | Data |
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70f80edf | 1 | /* OS ABI variant handling for GDB. |
533f1d8f | 2 | |
7b6bb8da | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 |
9b254dd1 | 4 | Free Software Foundation, Inc. |
70f80edf JT |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
70f80edf JT |
11 | (at your option) any later version. |
12 | ||
a9762ec7 | 13 | This program is distributed in the hope that it will be useful, |
70f80edf JT |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
a9762ec7 | 17 | |
70f80edf | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
70f80edf JT |
20 | |
21 | #include "defs.h" | |
05816f70 MK |
22 | |
23 | #include "gdb_assert.h" | |
309367d4 | 24 | #include "gdb_string.h" |
05816f70 | 25 | |
70f80edf | 26 | #include "osabi.h" |
b00a8037 DJ |
27 | #include "arch-utils.h" |
28 | #include "gdbcmd.h" | |
29 | #include "command.h" | |
70f80edf JT |
30 | |
31 | #include "elf-bfd.h" | |
32 | ||
b00a8037 DJ |
33 | #ifndef GDB_OSABI_DEFAULT |
34 | #define GDB_OSABI_DEFAULT GDB_OSABI_UNKNOWN | |
35 | #endif | |
36 | ||
37 | /* State for the "set osabi" command. */ | |
38 | static enum { osabi_auto, osabi_default, osabi_user } user_osabi_state; | |
39 | static enum gdb_osabi user_selected_osabi; | |
40 | static const char *gdb_osabi_available_names[GDB_OSABI_INVALID + 3] = { | |
41 | "auto", | |
42 | "default", | |
43 | "none", | |
44 | NULL | |
45 | }; | |
46 | static const char *set_osabi_string; | |
70f80edf JT |
47 | |
48 | /* This table matches the indices assigned to enum gdb_osabi. Keep | |
49 | them in sync. */ | |
50 | static const char * const gdb_osabi_names[] = | |
51 | { | |
b00a8037 | 52 | "none", |
70f80edf JT |
53 | |
54 | "SVR4", | |
55 | "GNU/Hurd", | |
56 | "Solaris", | |
57 | "OSF/1", | |
58 | "GNU/Linux", | |
59 | "FreeBSD a.out", | |
60 | "FreeBSD ELF", | |
61 | "NetBSD a.out", | |
62 | "NetBSD ELF", | |
d33b9831 | 63 | "OpenBSD ELF", |
70f80edf | 64 | "Windows CE", |
1029b7fa | 65 | "DJGPP", |
b96d0a4e | 66 | "Irix", |
e64f66d1 | 67 | "Interix", |
a09a320d JB |
68 | "HP/UX ELF", |
69 | "HP/UX SOM", | |
83461b86 | 70 | "QNX Neutrino", |
1762d96d | 71 | "Cygwin", |
1f82754b | 72 | "AIX", |
a15c5c83 | 73 | "DICOS", |
a80b95ba | 74 | "Darwin", |
78664fa3 | 75 | "Symbian", |
1762d96d | 76 | |
70f80edf JT |
77 | "<invalid>" |
78 | }; | |
79 | ||
80 | const char * | |
81 | gdbarch_osabi_name (enum gdb_osabi osabi) | |
82 | { | |
83 | if (osabi >= GDB_OSABI_UNKNOWN && osabi < GDB_OSABI_INVALID) | |
84 | return gdb_osabi_names[osabi]; | |
85 | ||
86 | return gdb_osabi_names[GDB_OSABI_INVALID]; | |
87 | } | |
88 | ||
08d16641 PA |
89 | /* Lookup the OS ABI corresponding to the specified target description |
90 | string. */ | |
91 | ||
92 | enum gdb_osabi | |
93 | osabi_from_tdesc_string (const char *name) | |
94 | { | |
95 | int i; | |
96 | ||
97 | for (i = 0; i < ARRAY_SIZE (gdb_osabi_names); i++) | |
98 | if (strcmp (name, gdb_osabi_names[i]) == 0) | |
99 | { | |
100 | /* See note above: the name table matches the indices assigned | |
101 | to enum gdb_osabi. */ | |
102 | enum gdb_osabi osabi = (enum gdb_osabi) i; | |
103 | ||
104 | if (osabi == GDB_OSABI_INVALID) | |
105 | return GDB_OSABI_UNKNOWN; | |
106 | else | |
107 | return osabi; | |
108 | } | |
109 | ||
110 | return GDB_OSABI_UNKNOWN; | |
111 | } | |
112 | ||
70f80edf JT |
113 | /* Handler for a given architecture/OS ABI pair. There should be only |
114 | one handler for a given OS ABI each architecture family. */ | |
115 | struct gdb_osabi_handler | |
116 | { | |
117 | struct gdb_osabi_handler *next; | |
05816f70 | 118 | const struct bfd_arch_info *arch_info; |
70f80edf JT |
119 | enum gdb_osabi osabi; |
120 | void (*init_osabi)(struct gdbarch_info, struct gdbarch *); | |
121 | }; | |
122 | ||
123 | static struct gdb_osabi_handler *gdb_osabi_handler_list; | |
124 | ||
125 | void | |
05816f70 MK |
126 | gdbarch_register_osabi (enum bfd_architecture arch, unsigned long machine, |
127 | enum gdb_osabi osabi, | |
70f80edf JT |
128 | void (*init_osabi)(struct gdbarch_info, |
129 | struct gdbarch *)) | |
130 | { | |
131 | struct gdb_osabi_handler **handler_p; | |
05816f70 | 132 | const struct bfd_arch_info *arch_info = bfd_lookup_arch (arch, machine); |
b00a8037 | 133 | const char **name_ptr; |
70f80edf JT |
134 | |
135 | /* Registering an OS ABI handler for "unknown" is not allowed. */ | |
136 | if (osabi == GDB_OSABI_UNKNOWN) | |
137 | { | |
138 | internal_error | |
139 | (__FILE__, __LINE__, | |
e2e0b3e5 | 140 | _("gdbarch_register_osabi: An attempt to register a handler for " |
70f80edf | 141 | "OS ABI \"%s\" for architecture %s was made. The handler will " |
e2e0b3e5 | 142 | "not be registered"), |
70f80edf | 143 | gdbarch_osabi_name (osabi), |
05816f70 | 144 | bfd_printable_arch_mach (arch, machine)); |
70f80edf JT |
145 | return; |
146 | } | |
147 | ||
05816f70 MK |
148 | gdb_assert (arch_info); |
149 | ||
70f80edf JT |
150 | for (handler_p = &gdb_osabi_handler_list; *handler_p != NULL; |
151 | handler_p = &(*handler_p)->next) | |
152 | { | |
05816f70 | 153 | if ((*handler_p)->arch_info == arch_info |
70f80edf JT |
154 | && (*handler_p)->osabi == osabi) |
155 | { | |
156 | internal_error | |
157 | (__FILE__, __LINE__, | |
e2e0b3e5 AC |
158 | _("gdbarch_register_osabi: A handler for OS ABI \"%s\" " |
159 | "has already been registered for architecture %s"), | |
70f80edf | 160 | gdbarch_osabi_name (osabi), |
05816f70 | 161 | arch_info->printable_name); |
70f80edf JT |
162 | /* If user wants to continue, override previous definition. */ |
163 | (*handler_p)->init_osabi = init_osabi; | |
164 | return; | |
165 | } | |
166 | } | |
167 | ||
168 | (*handler_p) | |
169 | = (struct gdb_osabi_handler *) xmalloc (sizeof (struct gdb_osabi_handler)); | |
170 | (*handler_p)->next = NULL; | |
05816f70 | 171 | (*handler_p)->arch_info = arch_info; |
70f80edf JT |
172 | (*handler_p)->osabi = osabi; |
173 | (*handler_p)->init_osabi = init_osabi; | |
b00a8037 DJ |
174 | |
175 | /* Add this OS ABI to the list of enum values for "set osabi", if it isn't | |
176 | already there. */ | |
177 | for (name_ptr = gdb_osabi_available_names; *name_ptr; name_ptr ++) | |
178 | { | |
179 | if (*name_ptr == gdbarch_osabi_name (osabi)) | |
180 | return; | |
181 | } | |
182 | *name_ptr++ = gdbarch_osabi_name (osabi); | |
183 | *name_ptr = NULL; | |
70f80edf JT |
184 | } |
185 | \f | |
186 | ||
0df8b418 | 187 | /* Sniffer to find the OS ABI for a given file's architecture and flavour. |
70f80edf JT |
188 | It is legal to have multiple sniffers for each arch/flavour pair, to |
189 | disambiguate one OS's a.out from another, for example. The first sniffer | |
190 | to return something other than GDB_OSABI_UNKNOWN wins, so a sniffer should | |
191 | be careful to claim a file only if it knows for sure what it is. */ | |
192 | struct gdb_osabi_sniffer | |
193 | { | |
194 | struct gdb_osabi_sniffer *next; | |
195 | enum bfd_architecture arch; /* bfd_arch_unknown == wildcard */ | |
196 | enum bfd_flavour flavour; | |
197 | enum gdb_osabi (*sniffer)(bfd *); | |
198 | }; | |
199 | ||
200 | static struct gdb_osabi_sniffer *gdb_osabi_sniffer_list; | |
201 | ||
202 | void | |
203 | gdbarch_register_osabi_sniffer (enum bfd_architecture arch, | |
204 | enum bfd_flavour flavour, | |
205 | enum gdb_osabi (*sniffer_fn)(bfd *)) | |
206 | { | |
207 | struct gdb_osabi_sniffer *sniffer; | |
208 | ||
209 | sniffer = | |
210 | (struct gdb_osabi_sniffer *) xmalloc (sizeof (struct gdb_osabi_sniffer)); | |
211 | sniffer->arch = arch; | |
212 | sniffer->flavour = flavour; | |
213 | sniffer->sniffer = sniffer_fn; | |
214 | ||
215 | sniffer->next = gdb_osabi_sniffer_list; | |
216 | gdb_osabi_sniffer_list = sniffer; | |
217 | } | |
218 | \f | |
219 | ||
220 | enum gdb_osabi | |
221 | gdbarch_lookup_osabi (bfd *abfd) | |
222 | { | |
223 | struct gdb_osabi_sniffer *sniffer; | |
224 | enum gdb_osabi osabi, match; | |
225 | int match_specific; | |
226 | ||
b00a8037 DJ |
227 | /* If we aren't in "auto" mode, return the specified OS ABI. */ |
228 | if (user_osabi_state == osabi_user) | |
229 | return user_selected_osabi; | |
230 | ||
08d16641 PA |
231 | /* If we don't have a binary, just return unknown. The caller may |
232 | have other sources the OSABI can be extracted from, e.g., the | |
233 | target description. */ | |
b00a8037 | 234 | if (abfd == NULL) |
08d16641 | 235 | return GDB_OSABI_UNKNOWN; |
4be87837 | 236 | |
70f80edf JT |
237 | match = GDB_OSABI_UNKNOWN; |
238 | match_specific = 0; | |
239 | ||
240 | for (sniffer = gdb_osabi_sniffer_list; sniffer != NULL; | |
241 | sniffer = sniffer->next) | |
242 | { | |
243 | if ((sniffer->arch == bfd_arch_unknown /* wildcard */ | |
244 | || sniffer->arch == bfd_get_arch (abfd)) | |
245 | && sniffer->flavour == bfd_get_flavour (abfd)) | |
246 | { | |
247 | osabi = (*sniffer->sniffer) (abfd); | |
248 | if (osabi < GDB_OSABI_UNKNOWN || osabi >= GDB_OSABI_INVALID) | |
249 | { | |
250 | internal_error | |
251 | (__FILE__, __LINE__, | |
e2e0b3e5 AC |
252 | _("gdbarch_lookup_osabi: invalid OS ABI (%d) from sniffer " |
253 | "for architecture %s flavour %d"), | |
70f80edf JT |
254 | (int) osabi, |
255 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
256 | (int) bfd_get_flavour (abfd)); | |
257 | } | |
258 | else if (osabi != GDB_OSABI_UNKNOWN) | |
259 | { | |
260 | /* A specific sniffer always overrides a generic sniffer. | |
261 | Croak on multiple match if the two matches are of the | |
262 | same class. If the user wishes to continue, we'll use | |
263 | the first match. */ | |
264 | if (match != GDB_OSABI_UNKNOWN) | |
265 | { | |
266 | if ((match_specific && sniffer->arch != bfd_arch_unknown) | |
267 | || (!match_specific && sniffer->arch == bfd_arch_unknown)) | |
268 | { | |
269 | internal_error | |
270 | (__FILE__, __LINE__, | |
e2e0b3e5 | 271 | _("gdbarch_lookup_osabi: multiple %sspecific OS ABI " |
70f80edf | 272 | "match for architecture %s flavour %d: first " |
e2e0b3e5 | 273 | "match \"%s\", second match \"%s\""), |
70f80edf JT |
274 | match_specific ? "" : "non-", |
275 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
276 | (int) bfd_get_flavour (abfd), | |
277 | gdbarch_osabi_name (match), | |
278 | gdbarch_osabi_name (osabi)); | |
279 | } | |
280 | else if (sniffer->arch != bfd_arch_unknown) | |
281 | { | |
282 | match = osabi; | |
283 | match_specific = 1; | |
284 | } | |
285 | } | |
286 | else | |
287 | { | |
288 | match = osabi; | |
289 | if (sniffer->arch != bfd_arch_unknown) | |
290 | match_specific = 1; | |
291 | } | |
292 | } | |
293 | } | |
294 | } | |
295 | ||
08d16641 | 296 | return match; |
70f80edf JT |
297 | } |
298 | ||
6cfae0bc JB |
299 | |
300 | /* Return non-zero if architecture A can run code written for | |
301 | architecture B. */ | |
302 | static int | |
303 | can_run_code_for (const struct bfd_arch_info *a, const struct bfd_arch_info *b) | |
304 | { | |
305 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
306 | incompatible. But if they are compatible, it returns the 'more | |
307 | featureful' of the two arches. That is, if A can run code | |
308 | written for B, but B can't run code written for A, then it'll | |
309 | return A. | |
310 | ||
5f724446 AC |
311 | struct bfd_arch_info objects are singletons: that is, there's |
312 | supposed to be exactly one instance for a given machine. So you | |
313 | can tell whether two are equivalent by comparing pointers. */ | |
6cfae0bc JB |
314 | return (a == b || a->compatible (a, b) == a); |
315 | } | |
316 | ||
317 | ||
70f80edf | 318 | void |
4be87837 | 319 | gdbarch_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) |
70f80edf | 320 | { |
05816f70 | 321 | struct gdb_osabi_handler *handler; |
70f80edf | 322 | |
4be87837 | 323 | if (info.osabi == GDB_OSABI_UNKNOWN) |
70f80edf | 324 | { |
01fc4e33 AC |
325 | /* Don't complain about an unknown OSABI. Assume the user knows |
326 | what they are doing. */ | |
70f80edf JT |
327 | return; |
328 | } | |
329 | ||
330 | for (handler = gdb_osabi_handler_list; handler != NULL; | |
331 | handler = handler->next) | |
332 | { | |
4be87837 | 333 | if (handler->osabi != info.osabi) |
05816f70 MK |
334 | continue; |
335 | ||
6cfae0bc JB |
336 | /* If the architecture described by ARCH_INFO can run code for |
337 | the architcture we registered the handler for, then the | |
338 | handler is applicable. Note, though, that if the handler is | |
339 | for an architecture that is a superset of ARCH_INFO, we can't | |
340 | use that --- it would be perfectly correct for it to install | |
341 | gdbarch methods that refer to registers / instructions / | |
342 | other facilities ARCH_INFO doesn't have. | |
05816f70 | 343 | |
6cfae0bc | 344 | NOTE: kettenis/20021027: There may be more than one machine |
05816f70 MK |
345 | type that is compatible with the desired machine type. Right |
346 | now we simply return the first match, which is fine for now. | |
347 | However, we might want to do something smarter in the future. */ | |
5f724446 AC |
348 | /* NOTE: cagney/2003-10-23: The code for "a can_run_code_for b" |
349 | is implemented using BFD's compatible method (a->compatible | |
350 | (b) == a -- the lowest common denominator between a and b is | |
351 | a). That method's definition of compatible may not be as you | |
ce2826aa | 352 | expect. For instance the test "amd64 can run code for i386" |
5f724446 | 353 | (or more generally "64-bit ISA can run code for the 32-bit |
ce2826aa AC |
354 | ISA"). BFD doesn't normally consider 32-bit and 64-bit |
355 | "compatible" so it doesn't succeed. */ | |
931758af | 356 | if (can_run_code_for (info.bfd_arch_info, handler->arch_info)) |
70f80edf JT |
357 | { |
358 | (*handler->init_osabi) (info, gdbarch); | |
359 | return; | |
360 | } | |
361 | } | |
362 | ||
e481341f JB |
363 | warning |
364 | ("A handler for the OS ABI \"%s\" is not built into this configuration\n" | |
365 | "of GDB. Attempting to continue with the default %s settings.\n", | |
366 | gdbarch_osabi_name (info.osabi), | |
367 | info.bfd_arch_info->printable_name); | |
70f80edf JT |
368 | } |
369 | \f | |
a49d618c MK |
370 | /* Limit on the amount of data to be read. */ |
371 | #define MAX_NOTESZ 128 | |
372 | ||
373 | /* Return non-zero if NOTE matches NAME, DESCSZ and TYPE. */ | |
374 | ||
375 | static int | |
376 | check_note (bfd *abfd, asection *sect, const char *note, | |
377 | const char *name, unsigned long descsz, unsigned long type) | |
378 | { | |
379 | unsigned long notesz; | |
380 | ||
381 | /* Calculate the size of this note. */ | |
382 | notesz = strlen (name) + 1; | |
383 | notesz = ((notesz + 3) & ~3); | |
384 | notesz += descsz; | |
385 | notesz = ((notesz + 3) & ~3); | |
386 | ||
387 | /* If this assertion triggers, increase MAX_NOTESZ. */ | |
388 | gdb_assert (notesz <= MAX_NOTESZ); | |
389 | ||
390 | /* Check whether SECT is big enough to comtain the complete note. */ | |
391 | if (notesz > bfd_section_size (abfd, sect)) | |
392 | return 0; | |
393 | ||
394 | /* Check the note name. */ | |
395 | if (bfd_h_get_32 (abfd, note) != (strlen (name) + 1) | |
396 | || strcmp (note + 12, name) != 0) | |
397 | return 0; | |
398 | ||
399 | /* Check the descriptor size. */ | |
400 | if (bfd_h_get_32 (abfd, note + 4) != descsz) | |
401 | return 0; | |
402 | ||
403 | /* Check the note type. */ | |
404 | if (bfd_h_get_32 (abfd, note + 8) != type) | |
405 | return 0; | |
406 | ||
407 | return 1; | |
408 | } | |
70f80edf JT |
409 | |
410 | /* Generic sniffer for ELF flavoured files. */ | |
411 | ||
412 | void | |
413 | generic_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, void *obj) | |
414 | { | |
a49d618c | 415 | enum gdb_osabi *osabi = obj; |
70f80edf JT |
416 | const char *name; |
417 | unsigned int sectsize; | |
a49d618c | 418 | char *note; |
70f80edf JT |
419 | |
420 | name = bfd_get_section_name (abfd, sect); | |
421 | sectsize = bfd_section_size (abfd, sect); | |
422 | ||
a49d618c MK |
423 | /* Limit the amount of data to read. */ |
424 | if (sectsize > MAX_NOTESZ) | |
425 | sectsize = MAX_NOTESZ; | |
70f80edf | 426 | |
a49d618c MK |
427 | note = alloca (sectsize); |
428 | bfd_get_section_contents (abfd, sect, note, 0, sectsize); | |
70f80edf | 429 | |
a49d618c MK |
430 | /* .note.ABI-tag notes, used by GNU/Linux and FreeBSD. */ |
431 | if (strcmp (name, ".note.ABI-tag") == 0) | |
432 | { | |
433 | /* GNU. */ | |
434 | if (check_note (abfd, sect, note, "GNU", 16, NT_GNU_ABI_TAG)) | |
70f80edf | 435 | { |
a49d618c | 436 | unsigned int abi_tag = bfd_h_get_32 (abfd, note + 16); |
70f80edf | 437 | |
a49d618c | 438 | switch (abi_tag) |
70f80edf JT |
439 | { |
440 | case GNU_ABI_TAG_LINUX: | |
a49d618c | 441 | *osabi = GDB_OSABI_LINUX; |
70f80edf JT |
442 | break; |
443 | ||
444 | case GNU_ABI_TAG_HURD: | |
a49d618c | 445 | *osabi = GDB_OSABI_HURD; |
70f80edf JT |
446 | break; |
447 | ||
448 | case GNU_ABI_TAG_SOLARIS: | |
a49d618c | 449 | *osabi = GDB_OSABI_SOLARIS; |
70f80edf JT |
450 | break; |
451 | ||
261de166 | 452 | case GNU_ABI_TAG_FREEBSD: |
a49d618c | 453 | *osabi = GDB_OSABI_FREEBSD_ELF; |
261de166 | 454 | break; |
a49d618c | 455 | |
261de166 | 456 | case GNU_ABI_TAG_NETBSD: |
a49d618c | 457 | *osabi = GDB_OSABI_NETBSD_ELF; |
261de166 | 458 | break; |
a49d618c | 459 | |
70f80edf | 460 | default: |
3e43a32a MS |
461 | internal_error (__FILE__, __LINE__, |
462 | _("generic_elf_osabi_sniff_abi_tag_sections: " | |
463 | "unknown OS number %d"), | |
a49d618c | 464 | abi_tag); |
70f80edf JT |
465 | } |
466 | return; | |
467 | } | |
a49d618c MK |
468 | |
469 | /* FreeBSD. */ | |
470 | if (check_note (abfd, sect, note, "FreeBSD", 4, NT_FREEBSD_ABI_TAG)) | |
70f80edf | 471 | { |
a49d618c MK |
472 | /* There is no need to check the version yet. */ |
473 | *osabi = GDB_OSABI_FREEBSD_ELF; | |
474 | return; | |
70f80edf | 475 | } |
a49d618c | 476 | |
70f80edf JT |
477 | return; |
478 | } | |
a49d618c | 479 | |
70f80edf | 480 | /* .note.netbsd.ident notes, used by NetBSD. */ |
a49d618c MK |
481 | if (strcmp (name, ".note.netbsd.ident") == 0 |
482 | && check_note (abfd, sect, note, "NetBSD", 4, NT_NETBSD_IDENT)) | |
70f80edf | 483 | { |
a49d618c MK |
484 | /* There is no need to check the version yet. */ |
485 | *osabi = GDB_OSABI_NETBSD_ELF; | |
70f80edf JT |
486 | return; |
487 | } | |
597684c5 | 488 | |
642d8300 MK |
489 | /* .note.openbsd.ident notes, used by OpenBSD. */ |
490 | if (strcmp (name, ".note.openbsd.ident") == 0 | |
491 | && check_note (abfd, sect, note, "OpenBSD", 4, NT_OPENBSD_IDENT)) | |
492 | { | |
493 | /* There is no need to check the version yet. */ | |
494 | *osabi = GDB_OSABI_OPENBSD_ELF; | |
495 | return; | |
496 | } | |
497 | ||
597684c5 | 498 | /* .note.netbsdcore.procinfo notes, used by NetBSD. */ |
a49d618c | 499 | if (strcmp (name, ".note.netbsdcore.procinfo") == 0) |
597684c5 | 500 | { |
a49d618c | 501 | *osabi = GDB_OSABI_NETBSD_ELF; |
597684c5 MK |
502 | return; |
503 | } | |
70f80edf JT |
504 | } |
505 | ||
506 | static enum gdb_osabi | |
507 | generic_elf_osabi_sniffer (bfd *abfd) | |
508 | { | |
509 | unsigned int elfosabi; | |
510 | enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; | |
511 | ||
512 | elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; | |
513 | ||
514 | switch (elfosabi) | |
515 | { | |
516 | case ELFOSABI_NONE: | |
533f1d8f MK |
517 | /* When the EI_OSABI field in the ELF header is ELFOSABI_NONE |
518 | (0), then the ELF structures in the file are conforming to | |
519 | the base specification for that machine (there are no | |
520 | OS-specific extensions). In order to determine the real OS | |
521 | in use we must look for OS-specific notes. */ | |
70f80edf JT |
522 | bfd_map_over_sections (abfd, |
523 | generic_elf_osabi_sniff_abi_tag_sections, | |
524 | &osabi); | |
525 | break; | |
526 | ||
527 | case ELFOSABI_FREEBSD: | |
528 | osabi = GDB_OSABI_FREEBSD_ELF; | |
529 | break; | |
530 | ||
531 | case ELFOSABI_NETBSD: | |
532 | osabi = GDB_OSABI_NETBSD_ELF; | |
533 | break; | |
534 | ||
535 | case ELFOSABI_LINUX: | |
536 | osabi = GDB_OSABI_LINUX; | |
537 | break; | |
538 | ||
539 | case ELFOSABI_HURD: | |
540 | osabi = GDB_OSABI_HURD; | |
541 | break; | |
542 | ||
543 | case ELFOSABI_SOLARIS: | |
544 | osabi = GDB_OSABI_SOLARIS; | |
545 | break; | |
a09a320d JB |
546 | |
547 | case ELFOSABI_HPUX: | |
533f1d8f MK |
548 | /* For some reason the default value for the EI_OSABI field is |
549 | ELFOSABI_HPUX for all PA-RISC targets (with the exception of | |
550 | GNU/Linux). We use HP-UX ELF as the default, but let any | |
551 | OS-specific notes override this. */ | |
a09a320d | 552 | osabi = GDB_OSABI_HPUX_ELF; |
533f1d8f MK |
553 | bfd_map_over_sections (abfd, |
554 | generic_elf_osabi_sniff_abi_tag_sections, | |
555 | &osabi); | |
a09a320d | 556 | break; |
70f80edf JT |
557 | } |
558 | ||
bb21884d MK |
559 | if (osabi == GDB_OSABI_UNKNOWN) |
560 | { | |
561 | /* The FreeBSD folks have been naughty; they stored the string | |
562 | "FreeBSD" in the padding of the e_ident field of the ELF | |
563 | header to "brand" their ELF binaries in FreeBSD 3.x. */ | |
1731e543 | 564 | if (memcmp (&elf_elfheader (abfd)->e_ident[8], |
6062517a | 565 | "FreeBSD", sizeof ("FreeBSD")) == 0) |
bb21884d MK |
566 | osabi = GDB_OSABI_FREEBSD_ELF; |
567 | } | |
568 | ||
70f80edf JT |
569 | return osabi; |
570 | } | |
571 | \f | |
b00a8037 DJ |
572 | static void |
573 | set_osabi (char *args, int from_tty, struct cmd_list_element *c) | |
574 | { | |
575 | struct gdbarch_info info; | |
70f80edf | 576 | |
b00a8037 DJ |
577 | if (strcmp (set_osabi_string, "auto") == 0) |
578 | user_osabi_state = osabi_auto; | |
579 | else if (strcmp (set_osabi_string, "default") == 0) | |
580 | { | |
581 | user_selected_osabi = GDB_OSABI_DEFAULT; | |
582 | user_osabi_state = osabi_user; | |
583 | } | |
584 | else if (strcmp (set_osabi_string, "none") == 0) | |
585 | { | |
586 | user_selected_osabi = GDB_OSABI_UNKNOWN; | |
587 | user_osabi_state = osabi_user; | |
588 | } | |
589 | else | |
590 | { | |
591 | int i; | |
5cc80db3 | 592 | |
b00a8037 DJ |
593 | for (i = 1; i < GDB_OSABI_INVALID; i++) |
594 | if (strcmp (set_osabi_string, gdbarch_osabi_name (i)) == 0) | |
595 | { | |
596 | user_selected_osabi = i; | |
597 | user_osabi_state = osabi_user; | |
598 | break; | |
599 | } | |
600 | if (i == GDB_OSABI_INVALID) | |
601 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 602 | _("Invalid OS ABI \"%s\" passed to command handler."), |
b00a8037 DJ |
603 | set_osabi_string); |
604 | } | |
605 | ||
606 | /* NOTE: At some point (true multiple architectures) we'll need to be more | |
607 | graceful here. */ | |
608 | gdbarch_info_init (&info); | |
609 | if (! gdbarch_update_p (info)) | |
e2e0b3e5 | 610 | internal_error (__FILE__, __LINE__, _("Updating OS ABI failed.")); |
b00a8037 DJ |
611 | } |
612 | ||
b9362cc7 | 613 | static void |
7ab04401 AC |
614 | show_osabi (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
615 | const char *value) | |
b00a8037 DJ |
616 | { |
617 | if (user_osabi_state == osabi_auto) | |
7ab04401 | 618 | fprintf_filtered (file, |
3e43a32a MS |
619 | _("The current OS ABI is \"auto\" " |
620 | "(currently \"%s\").\n"), | |
e17c207e | 621 | gdbarch_osabi_name (gdbarch_osabi (get_current_arch ()))); |
b00a8037 | 622 | else |
7ab04401 AC |
623 | fprintf_filtered (file, _("The current OS ABI is \"%s\".\n"), |
624 | gdbarch_osabi_name (user_selected_osabi)); | |
b00a8037 DJ |
625 | |
626 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN) | |
7ab04401 AC |
627 | fprintf_filtered (file, _("The default OS ABI is \"%s\".\n"), |
628 | gdbarch_osabi_name (GDB_OSABI_DEFAULT)); | |
b00a8037 DJ |
629 | } |
630 | \f | |
b9362cc7 AC |
631 | extern initialize_file_ftype _initialize_gdb_osabi; /* -Wmissing-prototype */ |
632 | ||
70f80edf JT |
633 | void |
634 | _initialize_gdb_osabi (void) | |
635 | { | |
636 | if (strcmp (gdb_osabi_names[GDB_OSABI_INVALID], "<invalid>") != 0) | |
637 | internal_error | |
638 | (__FILE__, __LINE__, | |
e2e0b3e5 | 639 | _("_initialize_gdb_osabi: gdb_osabi_names[] is inconsistent")); |
70f80edf JT |
640 | |
641 | /* Register a generic sniffer for ELF flavoured files. */ | |
642 | gdbarch_register_osabi_sniffer (bfd_arch_unknown, | |
643 | bfd_target_elf_flavour, | |
644 | generic_elf_osabi_sniffer); | |
b00a8037 | 645 | |
b00a8037 | 646 | /* Register the "set osabi" command. */ |
7ab04401 | 647 | add_setshow_enum_cmd ("osabi", class_support, gdb_osabi_available_names, |
3e43a32a MS |
648 | &set_osabi_string, |
649 | _("Set OS ABI of target."), | |
650 | _("Show OS ABI of target."), | |
651 | NULL, set_osabi, show_osabi, | |
7ab04401 | 652 | &setlist, &showlist); |
b00a8037 | 653 | user_osabi_state = osabi_auto; |
70f80edf | 654 | } |