Commit | Line | Data |
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70f80edf | 1 | /* OS ABI variant handling for GDB. |
533f1d8f | 2 | |
9b254dd1 DJ |
3 | Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008 |
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", | |
70f80edf | 70 | |
83461b86 | 71 | "QNX Neutrino", |
70f80edf | 72 | |
1762d96d | 73 | "Cygwin", |
1f82754b | 74 | "AIX", |
1762d96d | 75 | |
70f80edf JT |
76 | "<invalid>" |
77 | }; | |
78 | ||
79 | const char * | |
80 | gdbarch_osabi_name (enum gdb_osabi osabi) | |
81 | { | |
82 | if (osabi >= GDB_OSABI_UNKNOWN && osabi < GDB_OSABI_INVALID) | |
83 | return gdb_osabi_names[osabi]; | |
84 | ||
85 | return gdb_osabi_names[GDB_OSABI_INVALID]; | |
86 | } | |
87 | ||
88 | /* Handler for a given architecture/OS ABI pair. There should be only | |
89 | one handler for a given OS ABI each architecture family. */ | |
90 | struct gdb_osabi_handler | |
91 | { | |
92 | struct gdb_osabi_handler *next; | |
05816f70 | 93 | const struct bfd_arch_info *arch_info; |
70f80edf JT |
94 | enum gdb_osabi osabi; |
95 | void (*init_osabi)(struct gdbarch_info, struct gdbarch *); | |
96 | }; | |
97 | ||
98 | static struct gdb_osabi_handler *gdb_osabi_handler_list; | |
99 | ||
100 | void | |
05816f70 MK |
101 | gdbarch_register_osabi (enum bfd_architecture arch, unsigned long machine, |
102 | enum gdb_osabi osabi, | |
70f80edf JT |
103 | void (*init_osabi)(struct gdbarch_info, |
104 | struct gdbarch *)) | |
105 | { | |
106 | struct gdb_osabi_handler **handler_p; | |
05816f70 | 107 | const struct bfd_arch_info *arch_info = bfd_lookup_arch (arch, machine); |
b00a8037 | 108 | const char **name_ptr; |
70f80edf JT |
109 | |
110 | /* Registering an OS ABI handler for "unknown" is not allowed. */ | |
111 | if (osabi == GDB_OSABI_UNKNOWN) | |
112 | { | |
113 | internal_error | |
114 | (__FILE__, __LINE__, | |
e2e0b3e5 | 115 | _("gdbarch_register_osabi: An attempt to register a handler for " |
70f80edf | 116 | "OS ABI \"%s\" for architecture %s was made. The handler will " |
e2e0b3e5 | 117 | "not be registered"), |
70f80edf | 118 | gdbarch_osabi_name (osabi), |
05816f70 | 119 | bfd_printable_arch_mach (arch, machine)); |
70f80edf JT |
120 | return; |
121 | } | |
122 | ||
05816f70 MK |
123 | gdb_assert (arch_info); |
124 | ||
70f80edf JT |
125 | for (handler_p = &gdb_osabi_handler_list; *handler_p != NULL; |
126 | handler_p = &(*handler_p)->next) | |
127 | { | |
05816f70 | 128 | if ((*handler_p)->arch_info == arch_info |
70f80edf JT |
129 | && (*handler_p)->osabi == osabi) |
130 | { | |
131 | internal_error | |
132 | (__FILE__, __LINE__, | |
e2e0b3e5 AC |
133 | _("gdbarch_register_osabi: A handler for OS ABI \"%s\" " |
134 | "has already been registered for architecture %s"), | |
70f80edf | 135 | gdbarch_osabi_name (osabi), |
05816f70 | 136 | arch_info->printable_name); |
70f80edf JT |
137 | /* If user wants to continue, override previous definition. */ |
138 | (*handler_p)->init_osabi = init_osabi; | |
139 | return; | |
140 | } | |
141 | } | |
142 | ||
143 | (*handler_p) | |
144 | = (struct gdb_osabi_handler *) xmalloc (sizeof (struct gdb_osabi_handler)); | |
145 | (*handler_p)->next = NULL; | |
05816f70 | 146 | (*handler_p)->arch_info = arch_info; |
70f80edf JT |
147 | (*handler_p)->osabi = osabi; |
148 | (*handler_p)->init_osabi = init_osabi; | |
b00a8037 DJ |
149 | |
150 | /* Add this OS ABI to the list of enum values for "set osabi", if it isn't | |
151 | already there. */ | |
152 | for (name_ptr = gdb_osabi_available_names; *name_ptr; name_ptr ++) | |
153 | { | |
154 | if (*name_ptr == gdbarch_osabi_name (osabi)) | |
155 | return; | |
156 | } | |
157 | *name_ptr++ = gdbarch_osabi_name (osabi); | |
158 | *name_ptr = NULL; | |
70f80edf JT |
159 | } |
160 | \f | |
161 | ||
162 | /* Sniffer to find the OS ABI for a given file's architecture and flavour. | |
163 | It is legal to have multiple sniffers for each arch/flavour pair, to | |
164 | disambiguate one OS's a.out from another, for example. The first sniffer | |
165 | to return something other than GDB_OSABI_UNKNOWN wins, so a sniffer should | |
166 | be careful to claim a file only if it knows for sure what it is. */ | |
167 | struct gdb_osabi_sniffer | |
168 | { | |
169 | struct gdb_osabi_sniffer *next; | |
170 | enum bfd_architecture arch; /* bfd_arch_unknown == wildcard */ | |
171 | enum bfd_flavour flavour; | |
172 | enum gdb_osabi (*sniffer)(bfd *); | |
173 | }; | |
174 | ||
175 | static struct gdb_osabi_sniffer *gdb_osabi_sniffer_list; | |
176 | ||
177 | void | |
178 | gdbarch_register_osabi_sniffer (enum bfd_architecture arch, | |
179 | enum bfd_flavour flavour, | |
180 | enum gdb_osabi (*sniffer_fn)(bfd *)) | |
181 | { | |
182 | struct gdb_osabi_sniffer *sniffer; | |
183 | ||
184 | sniffer = | |
185 | (struct gdb_osabi_sniffer *) xmalloc (sizeof (struct gdb_osabi_sniffer)); | |
186 | sniffer->arch = arch; | |
187 | sniffer->flavour = flavour; | |
188 | sniffer->sniffer = sniffer_fn; | |
189 | ||
190 | sniffer->next = gdb_osabi_sniffer_list; | |
191 | gdb_osabi_sniffer_list = sniffer; | |
192 | } | |
193 | \f | |
194 | ||
195 | enum gdb_osabi | |
196 | gdbarch_lookup_osabi (bfd *abfd) | |
197 | { | |
198 | struct gdb_osabi_sniffer *sniffer; | |
199 | enum gdb_osabi osabi, match; | |
200 | int match_specific; | |
201 | ||
b00a8037 DJ |
202 | /* If we aren't in "auto" mode, return the specified OS ABI. */ |
203 | if (user_osabi_state == osabi_user) | |
204 | return user_selected_osabi; | |
205 | ||
206 | /* If we don't have a binary, return the default OS ABI (if set) or | |
59a59f84 | 207 | unknown (otherwise). */ |
b00a8037 | 208 | if (abfd == NULL) |
59a59f84 | 209 | return GDB_OSABI_DEFAULT; |
4be87837 | 210 | |
70f80edf JT |
211 | match = GDB_OSABI_UNKNOWN; |
212 | match_specific = 0; | |
213 | ||
214 | for (sniffer = gdb_osabi_sniffer_list; sniffer != NULL; | |
215 | sniffer = sniffer->next) | |
216 | { | |
217 | if ((sniffer->arch == bfd_arch_unknown /* wildcard */ | |
218 | || sniffer->arch == bfd_get_arch (abfd)) | |
219 | && sniffer->flavour == bfd_get_flavour (abfd)) | |
220 | { | |
221 | osabi = (*sniffer->sniffer) (abfd); | |
222 | if (osabi < GDB_OSABI_UNKNOWN || osabi >= GDB_OSABI_INVALID) | |
223 | { | |
224 | internal_error | |
225 | (__FILE__, __LINE__, | |
e2e0b3e5 AC |
226 | _("gdbarch_lookup_osabi: invalid OS ABI (%d) from sniffer " |
227 | "for architecture %s flavour %d"), | |
70f80edf JT |
228 | (int) osabi, |
229 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
230 | (int) bfd_get_flavour (abfd)); | |
231 | } | |
232 | else if (osabi != GDB_OSABI_UNKNOWN) | |
233 | { | |
234 | /* A specific sniffer always overrides a generic sniffer. | |
235 | Croak on multiple match if the two matches are of the | |
236 | same class. If the user wishes to continue, we'll use | |
237 | the first match. */ | |
238 | if (match != GDB_OSABI_UNKNOWN) | |
239 | { | |
240 | if ((match_specific && sniffer->arch != bfd_arch_unknown) | |
241 | || (!match_specific && sniffer->arch == bfd_arch_unknown)) | |
242 | { | |
243 | internal_error | |
244 | (__FILE__, __LINE__, | |
e2e0b3e5 | 245 | _("gdbarch_lookup_osabi: multiple %sspecific OS ABI " |
70f80edf | 246 | "match for architecture %s flavour %d: first " |
e2e0b3e5 | 247 | "match \"%s\", second match \"%s\""), |
70f80edf JT |
248 | match_specific ? "" : "non-", |
249 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
250 | (int) bfd_get_flavour (abfd), | |
251 | gdbarch_osabi_name (match), | |
252 | gdbarch_osabi_name (osabi)); | |
253 | } | |
254 | else if (sniffer->arch != bfd_arch_unknown) | |
255 | { | |
256 | match = osabi; | |
257 | match_specific = 1; | |
258 | } | |
259 | } | |
260 | else | |
261 | { | |
262 | match = osabi; | |
263 | if (sniffer->arch != bfd_arch_unknown) | |
264 | match_specific = 1; | |
265 | } | |
266 | } | |
267 | } | |
268 | } | |
269 | ||
b00a8037 DJ |
270 | /* If we didn't find a match, but a default was specified at configure |
271 | time, return the default. */ | |
272 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN && match == GDB_OSABI_UNKNOWN) | |
273 | return GDB_OSABI_DEFAULT; | |
274 | else | |
275 | return match; | |
70f80edf JT |
276 | } |
277 | ||
6cfae0bc JB |
278 | |
279 | /* Return non-zero if architecture A can run code written for | |
280 | architecture B. */ | |
281 | static int | |
282 | can_run_code_for (const struct bfd_arch_info *a, const struct bfd_arch_info *b) | |
283 | { | |
284 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
285 | incompatible. But if they are compatible, it returns the 'more | |
286 | featureful' of the two arches. That is, if A can run code | |
287 | written for B, but B can't run code written for A, then it'll | |
288 | return A. | |
289 | ||
5f724446 AC |
290 | struct bfd_arch_info objects are singletons: that is, there's |
291 | supposed to be exactly one instance for a given machine. So you | |
292 | can tell whether two are equivalent by comparing pointers. */ | |
6cfae0bc JB |
293 | return (a == b || a->compatible (a, b) == a); |
294 | } | |
295 | ||
296 | ||
70f80edf | 297 | void |
4be87837 | 298 | gdbarch_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) |
70f80edf | 299 | { |
05816f70 | 300 | struct gdb_osabi_handler *handler; |
70f80edf | 301 | |
4be87837 | 302 | if (info.osabi == GDB_OSABI_UNKNOWN) |
70f80edf | 303 | { |
01fc4e33 AC |
304 | /* Don't complain about an unknown OSABI. Assume the user knows |
305 | what they are doing. */ | |
70f80edf JT |
306 | return; |
307 | } | |
308 | ||
309 | for (handler = gdb_osabi_handler_list; handler != NULL; | |
310 | handler = handler->next) | |
311 | { | |
4be87837 | 312 | if (handler->osabi != info.osabi) |
05816f70 MK |
313 | continue; |
314 | ||
6cfae0bc JB |
315 | /* If the architecture described by ARCH_INFO can run code for |
316 | the architcture we registered the handler for, then the | |
317 | handler is applicable. Note, though, that if the handler is | |
318 | for an architecture that is a superset of ARCH_INFO, we can't | |
319 | use that --- it would be perfectly correct for it to install | |
320 | gdbarch methods that refer to registers / instructions / | |
321 | other facilities ARCH_INFO doesn't have. | |
05816f70 | 322 | |
6cfae0bc | 323 | NOTE: kettenis/20021027: There may be more than one machine |
05816f70 MK |
324 | type that is compatible with the desired machine type. Right |
325 | now we simply return the first match, which is fine for now. | |
326 | However, we might want to do something smarter in the future. */ | |
5f724446 AC |
327 | /* NOTE: cagney/2003-10-23: The code for "a can_run_code_for b" |
328 | is implemented using BFD's compatible method (a->compatible | |
329 | (b) == a -- the lowest common denominator between a and b is | |
330 | a). That method's definition of compatible may not be as you | |
ce2826aa | 331 | expect. For instance the test "amd64 can run code for i386" |
5f724446 | 332 | (or more generally "64-bit ISA can run code for the 32-bit |
ce2826aa AC |
333 | ISA"). BFD doesn't normally consider 32-bit and 64-bit |
334 | "compatible" so it doesn't succeed. */ | |
931758af | 335 | if (can_run_code_for (info.bfd_arch_info, handler->arch_info)) |
70f80edf JT |
336 | { |
337 | (*handler->init_osabi) (info, gdbarch); | |
338 | return; | |
339 | } | |
340 | } | |
341 | ||
e481341f JB |
342 | warning |
343 | ("A handler for the OS ABI \"%s\" is not built into this configuration\n" | |
344 | "of GDB. Attempting to continue with the default %s settings.\n", | |
345 | gdbarch_osabi_name (info.osabi), | |
346 | info.bfd_arch_info->printable_name); | |
70f80edf JT |
347 | } |
348 | \f | |
a49d618c MK |
349 | /* Limit on the amount of data to be read. */ |
350 | #define MAX_NOTESZ 128 | |
351 | ||
352 | /* Return non-zero if NOTE matches NAME, DESCSZ and TYPE. */ | |
353 | ||
354 | static int | |
355 | check_note (bfd *abfd, asection *sect, const char *note, | |
356 | const char *name, unsigned long descsz, unsigned long type) | |
357 | { | |
358 | unsigned long notesz; | |
359 | ||
360 | /* Calculate the size of this note. */ | |
361 | notesz = strlen (name) + 1; | |
362 | notesz = ((notesz + 3) & ~3); | |
363 | notesz += descsz; | |
364 | notesz = ((notesz + 3) & ~3); | |
365 | ||
366 | /* If this assertion triggers, increase MAX_NOTESZ. */ | |
367 | gdb_assert (notesz <= MAX_NOTESZ); | |
368 | ||
369 | /* Check whether SECT is big enough to comtain the complete note. */ | |
370 | if (notesz > bfd_section_size (abfd, sect)) | |
371 | return 0; | |
372 | ||
373 | /* Check the note name. */ | |
374 | if (bfd_h_get_32 (abfd, note) != (strlen (name) + 1) | |
375 | || strcmp (note + 12, name) != 0) | |
376 | return 0; | |
377 | ||
378 | /* Check the descriptor size. */ | |
379 | if (bfd_h_get_32 (abfd, note + 4) != descsz) | |
380 | return 0; | |
381 | ||
382 | /* Check the note type. */ | |
383 | if (bfd_h_get_32 (abfd, note + 8) != type) | |
384 | return 0; | |
385 | ||
386 | return 1; | |
387 | } | |
70f80edf JT |
388 | |
389 | /* Generic sniffer for ELF flavoured files. */ | |
390 | ||
391 | void | |
392 | generic_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, void *obj) | |
393 | { | |
a49d618c | 394 | enum gdb_osabi *osabi = obj; |
70f80edf JT |
395 | const char *name; |
396 | unsigned int sectsize; | |
a49d618c | 397 | char *note; |
70f80edf JT |
398 | |
399 | name = bfd_get_section_name (abfd, sect); | |
400 | sectsize = bfd_section_size (abfd, sect); | |
401 | ||
a49d618c MK |
402 | /* Limit the amount of data to read. */ |
403 | if (sectsize > MAX_NOTESZ) | |
404 | sectsize = MAX_NOTESZ; | |
70f80edf | 405 | |
a49d618c MK |
406 | note = alloca (sectsize); |
407 | bfd_get_section_contents (abfd, sect, note, 0, sectsize); | |
70f80edf | 408 | |
a49d618c MK |
409 | /* .note.ABI-tag notes, used by GNU/Linux and FreeBSD. */ |
410 | if (strcmp (name, ".note.ABI-tag") == 0) | |
411 | { | |
412 | /* GNU. */ | |
413 | if (check_note (abfd, sect, note, "GNU", 16, NT_GNU_ABI_TAG)) | |
70f80edf | 414 | { |
a49d618c | 415 | unsigned int abi_tag = bfd_h_get_32 (abfd, note + 16); |
70f80edf | 416 | |
a49d618c | 417 | switch (abi_tag) |
70f80edf JT |
418 | { |
419 | case GNU_ABI_TAG_LINUX: | |
a49d618c | 420 | *osabi = GDB_OSABI_LINUX; |
70f80edf JT |
421 | break; |
422 | ||
423 | case GNU_ABI_TAG_HURD: | |
a49d618c | 424 | *osabi = GDB_OSABI_HURD; |
70f80edf JT |
425 | break; |
426 | ||
427 | case GNU_ABI_TAG_SOLARIS: | |
a49d618c | 428 | *osabi = GDB_OSABI_SOLARIS; |
70f80edf JT |
429 | break; |
430 | ||
261de166 | 431 | case GNU_ABI_TAG_FREEBSD: |
a49d618c | 432 | *osabi = GDB_OSABI_FREEBSD_ELF; |
261de166 | 433 | break; |
a49d618c | 434 | |
261de166 | 435 | case GNU_ABI_TAG_NETBSD: |
a49d618c | 436 | *osabi = GDB_OSABI_NETBSD_ELF; |
261de166 | 437 | break; |
a49d618c | 438 | |
70f80edf | 439 | default: |
e2e0b3e5 AC |
440 | internal_error (__FILE__, __LINE__, _("\ |
441 | generic_elf_osabi_sniff_abi_tag_sections: unknown OS number %d"), | |
a49d618c | 442 | abi_tag); |
70f80edf JT |
443 | } |
444 | return; | |
445 | } | |
a49d618c MK |
446 | |
447 | /* FreeBSD. */ | |
448 | if (check_note (abfd, sect, note, "FreeBSD", 4, NT_FREEBSD_ABI_TAG)) | |
70f80edf | 449 | { |
a49d618c MK |
450 | /* There is no need to check the version yet. */ |
451 | *osabi = GDB_OSABI_FREEBSD_ELF; | |
452 | return; | |
70f80edf | 453 | } |
a49d618c | 454 | |
70f80edf JT |
455 | return; |
456 | } | |
a49d618c | 457 | |
70f80edf | 458 | /* .note.netbsd.ident notes, used by NetBSD. */ |
a49d618c MK |
459 | if (strcmp (name, ".note.netbsd.ident") == 0 |
460 | && check_note (abfd, sect, note, "NetBSD", 4, NT_NETBSD_IDENT)) | |
70f80edf | 461 | { |
a49d618c MK |
462 | /* There is no need to check the version yet. */ |
463 | *osabi = GDB_OSABI_NETBSD_ELF; | |
70f80edf JT |
464 | return; |
465 | } | |
597684c5 | 466 | |
642d8300 MK |
467 | /* .note.openbsd.ident notes, used by OpenBSD. */ |
468 | if (strcmp (name, ".note.openbsd.ident") == 0 | |
469 | && check_note (abfd, sect, note, "OpenBSD", 4, NT_OPENBSD_IDENT)) | |
470 | { | |
471 | /* There is no need to check the version yet. */ | |
472 | *osabi = GDB_OSABI_OPENBSD_ELF; | |
473 | return; | |
474 | } | |
475 | ||
597684c5 | 476 | /* .note.netbsdcore.procinfo notes, used by NetBSD. */ |
a49d618c | 477 | if (strcmp (name, ".note.netbsdcore.procinfo") == 0) |
597684c5 | 478 | { |
a49d618c | 479 | *osabi = GDB_OSABI_NETBSD_ELF; |
597684c5 MK |
480 | return; |
481 | } | |
70f80edf JT |
482 | } |
483 | ||
484 | static enum gdb_osabi | |
485 | generic_elf_osabi_sniffer (bfd *abfd) | |
486 | { | |
487 | unsigned int elfosabi; | |
488 | enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; | |
489 | ||
490 | elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; | |
491 | ||
492 | switch (elfosabi) | |
493 | { | |
494 | case ELFOSABI_NONE: | |
533f1d8f MK |
495 | /* When the EI_OSABI field in the ELF header is ELFOSABI_NONE |
496 | (0), then the ELF structures in the file are conforming to | |
497 | the base specification for that machine (there are no | |
498 | OS-specific extensions). In order to determine the real OS | |
499 | in use we must look for OS-specific notes. */ | |
70f80edf JT |
500 | bfd_map_over_sections (abfd, |
501 | generic_elf_osabi_sniff_abi_tag_sections, | |
502 | &osabi); | |
503 | break; | |
504 | ||
505 | case ELFOSABI_FREEBSD: | |
506 | osabi = GDB_OSABI_FREEBSD_ELF; | |
507 | break; | |
508 | ||
509 | case ELFOSABI_NETBSD: | |
510 | osabi = GDB_OSABI_NETBSD_ELF; | |
511 | break; | |
512 | ||
513 | case ELFOSABI_LINUX: | |
514 | osabi = GDB_OSABI_LINUX; | |
515 | break; | |
516 | ||
517 | case ELFOSABI_HURD: | |
518 | osabi = GDB_OSABI_HURD; | |
519 | break; | |
520 | ||
521 | case ELFOSABI_SOLARIS: | |
522 | osabi = GDB_OSABI_SOLARIS; | |
523 | break; | |
a09a320d JB |
524 | |
525 | case ELFOSABI_HPUX: | |
533f1d8f MK |
526 | /* For some reason the default value for the EI_OSABI field is |
527 | ELFOSABI_HPUX for all PA-RISC targets (with the exception of | |
528 | GNU/Linux). We use HP-UX ELF as the default, but let any | |
529 | OS-specific notes override this. */ | |
a09a320d | 530 | osabi = GDB_OSABI_HPUX_ELF; |
533f1d8f MK |
531 | bfd_map_over_sections (abfd, |
532 | generic_elf_osabi_sniff_abi_tag_sections, | |
533 | &osabi); | |
a09a320d | 534 | break; |
70f80edf JT |
535 | } |
536 | ||
bb21884d MK |
537 | if (osabi == GDB_OSABI_UNKNOWN) |
538 | { | |
539 | /* The FreeBSD folks have been naughty; they stored the string | |
540 | "FreeBSD" in the padding of the e_ident field of the ELF | |
541 | header to "brand" their ELF binaries in FreeBSD 3.x. */ | |
1731e543 | 542 | if (memcmp (&elf_elfheader (abfd)->e_ident[8], |
6062517a | 543 | "FreeBSD", sizeof ("FreeBSD")) == 0) |
bb21884d MK |
544 | osabi = GDB_OSABI_FREEBSD_ELF; |
545 | } | |
546 | ||
70f80edf JT |
547 | return osabi; |
548 | } | |
549 | \f | |
b00a8037 DJ |
550 | static void |
551 | set_osabi (char *args, int from_tty, struct cmd_list_element *c) | |
552 | { | |
553 | struct gdbarch_info info; | |
70f80edf | 554 | |
b00a8037 DJ |
555 | if (strcmp (set_osabi_string, "auto") == 0) |
556 | user_osabi_state = osabi_auto; | |
557 | else if (strcmp (set_osabi_string, "default") == 0) | |
558 | { | |
559 | user_selected_osabi = GDB_OSABI_DEFAULT; | |
560 | user_osabi_state = osabi_user; | |
561 | } | |
562 | else if (strcmp (set_osabi_string, "none") == 0) | |
563 | { | |
564 | user_selected_osabi = GDB_OSABI_UNKNOWN; | |
565 | user_osabi_state = osabi_user; | |
566 | } | |
567 | else | |
568 | { | |
569 | int i; | |
570 | for (i = 1; i < GDB_OSABI_INVALID; i++) | |
571 | if (strcmp (set_osabi_string, gdbarch_osabi_name (i)) == 0) | |
572 | { | |
573 | user_selected_osabi = i; | |
574 | user_osabi_state = osabi_user; | |
575 | break; | |
576 | } | |
577 | if (i == GDB_OSABI_INVALID) | |
578 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 579 | _("Invalid OS ABI \"%s\" passed to command handler."), |
b00a8037 DJ |
580 | set_osabi_string); |
581 | } | |
582 | ||
583 | /* NOTE: At some point (true multiple architectures) we'll need to be more | |
584 | graceful here. */ | |
585 | gdbarch_info_init (&info); | |
586 | if (! gdbarch_update_p (info)) | |
e2e0b3e5 | 587 | internal_error (__FILE__, __LINE__, _("Updating OS ABI failed.")); |
b00a8037 DJ |
588 | } |
589 | ||
b9362cc7 | 590 | static void |
7ab04401 AC |
591 | show_osabi (struct ui_file *file, int from_tty, struct cmd_list_element *c, |
592 | const char *value) | |
b00a8037 DJ |
593 | { |
594 | if (user_osabi_state == osabi_auto) | |
7ab04401 AC |
595 | fprintf_filtered (file, |
596 | _("The current OS ABI is \"auto\" (currently \"%s\").\n"), | |
597 | gdbarch_osabi_name (gdbarch_osabi (current_gdbarch))); | |
b00a8037 | 598 | else |
7ab04401 AC |
599 | fprintf_filtered (file, _("The current OS ABI is \"%s\".\n"), |
600 | gdbarch_osabi_name (user_selected_osabi)); | |
b00a8037 DJ |
601 | |
602 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN) | |
7ab04401 AC |
603 | fprintf_filtered (file, _("The default OS ABI is \"%s\".\n"), |
604 | gdbarch_osabi_name (GDB_OSABI_DEFAULT)); | |
b00a8037 DJ |
605 | } |
606 | \f | |
b9362cc7 AC |
607 | extern initialize_file_ftype _initialize_gdb_osabi; /* -Wmissing-prototype */ |
608 | ||
70f80edf JT |
609 | void |
610 | _initialize_gdb_osabi (void) | |
611 | { | |
b00a8037 DJ |
612 | struct cmd_list_element *c; |
613 | ||
70f80edf JT |
614 | if (strcmp (gdb_osabi_names[GDB_OSABI_INVALID], "<invalid>") != 0) |
615 | internal_error | |
616 | (__FILE__, __LINE__, | |
e2e0b3e5 | 617 | _("_initialize_gdb_osabi: gdb_osabi_names[] is inconsistent")); |
70f80edf JT |
618 | |
619 | /* Register a generic sniffer for ELF flavoured files. */ | |
620 | gdbarch_register_osabi_sniffer (bfd_arch_unknown, | |
621 | bfd_target_elf_flavour, | |
622 | generic_elf_osabi_sniffer); | |
b00a8037 | 623 | |
b00a8037 | 624 | /* Register the "set osabi" command. */ |
7ab04401 AC |
625 | add_setshow_enum_cmd ("osabi", class_support, gdb_osabi_available_names, |
626 | &set_osabi_string, _("\ | |
627 | Set OS ABI of target."), _("\ | |
628 | Show OS ABI of target."), NULL, | |
629 | set_osabi, | |
630 | show_osabi, | |
631 | &setlist, &showlist); | |
b00a8037 | 632 | user_osabi_state = osabi_auto; |
70f80edf | 633 | } |