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70f80edf | 1 | /* OS ABI variant handling for GDB. |
4be87837 | 2 | Copyright 2001, 2002, 2003 Free Software Foundation, Inc. |
70f80edf JT |
3 | |
4 | This file is part of GDB. | |
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 2 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., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
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", | |
63 | "Windows CE", | |
1029b7fa MK |
64 | "DJGPP", |
65 | "NetWare", | |
b96d0a4e | 66 | "Irix", |
daa66587 | 67 | "LynxOS", |
e64f66d1 | 68 | "Interix", |
a09a320d JB |
69 | "HP/UX ELF", |
70 | "HP/UX SOM", | |
70f80edf JT |
71 | |
72 | "ARM EABI v1", | |
73 | "ARM EABI v2", | |
74 | "ARM APCS", | |
83461b86 | 75 | "QNX Neutrino", |
70f80edf | 76 | |
1762d96d CV |
77 | "Cygwin", |
78 | ||
70f80edf JT |
79 | "<invalid>" |
80 | }; | |
81 | ||
82 | const char * | |
83 | gdbarch_osabi_name (enum gdb_osabi osabi) | |
84 | { | |
85 | if (osabi >= GDB_OSABI_UNKNOWN && osabi < GDB_OSABI_INVALID) | |
86 | return gdb_osabi_names[osabi]; | |
87 | ||
88 | return gdb_osabi_names[GDB_OSABI_INVALID]; | |
89 | } | |
90 | ||
91 | /* Handler for a given architecture/OS ABI pair. There should be only | |
92 | one handler for a given OS ABI each architecture family. */ | |
93 | struct gdb_osabi_handler | |
94 | { | |
95 | struct gdb_osabi_handler *next; | |
05816f70 | 96 | const struct bfd_arch_info *arch_info; |
70f80edf JT |
97 | enum gdb_osabi osabi; |
98 | void (*init_osabi)(struct gdbarch_info, struct gdbarch *); | |
99 | }; | |
100 | ||
101 | static struct gdb_osabi_handler *gdb_osabi_handler_list; | |
102 | ||
103 | void | |
05816f70 MK |
104 | gdbarch_register_osabi (enum bfd_architecture arch, unsigned long machine, |
105 | enum gdb_osabi osabi, | |
70f80edf JT |
106 | void (*init_osabi)(struct gdbarch_info, |
107 | struct gdbarch *)) | |
108 | { | |
109 | struct gdb_osabi_handler **handler_p; | |
05816f70 | 110 | const struct bfd_arch_info *arch_info = bfd_lookup_arch (arch, machine); |
b00a8037 | 111 | const char **name_ptr; |
70f80edf JT |
112 | |
113 | /* Registering an OS ABI handler for "unknown" is not allowed. */ | |
114 | if (osabi == GDB_OSABI_UNKNOWN) | |
115 | { | |
116 | internal_error | |
117 | (__FILE__, __LINE__, | |
118 | "gdbarch_register_osabi: An attempt to register a handler for " | |
119 | "OS ABI \"%s\" for architecture %s was made. The handler will " | |
120 | "not be registered", | |
121 | gdbarch_osabi_name (osabi), | |
05816f70 | 122 | bfd_printable_arch_mach (arch, machine)); |
70f80edf JT |
123 | return; |
124 | } | |
125 | ||
05816f70 MK |
126 | gdb_assert (arch_info); |
127 | ||
70f80edf JT |
128 | for (handler_p = &gdb_osabi_handler_list; *handler_p != NULL; |
129 | handler_p = &(*handler_p)->next) | |
130 | { | |
05816f70 | 131 | if ((*handler_p)->arch_info == arch_info |
70f80edf JT |
132 | && (*handler_p)->osabi == osabi) |
133 | { | |
134 | internal_error | |
135 | (__FILE__, __LINE__, | |
136 | "gdbarch_register_osabi: A handler for OS ABI \"%s\" " | |
137 | "has already been registered for architecture %s", | |
138 | gdbarch_osabi_name (osabi), | |
05816f70 | 139 | arch_info->printable_name); |
70f80edf JT |
140 | /* If user wants to continue, override previous definition. */ |
141 | (*handler_p)->init_osabi = init_osabi; | |
142 | return; | |
143 | } | |
144 | } | |
145 | ||
146 | (*handler_p) | |
147 | = (struct gdb_osabi_handler *) xmalloc (sizeof (struct gdb_osabi_handler)); | |
148 | (*handler_p)->next = NULL; | |
05816f70 | 149 | (*handler_p)->arch_info = arch_info; |
70f80edf JT |
150 | (*handler_p)->osabi = osabi; |
151 | (*handler_p)->init_osabi = init_osabi; | |
b00a8037 DJ |
152 | |
153 | /* Add this OS ABI to the list of enum values for "set osabi", if it isn't | |
154 | already there. */ | |
155 | for (name_ptr = gdb_osabi_available_names; *name_ptr; name_ptr ++) | |
156 | { | |
157 | if (*name_ptr == gdbarch_osabi_name (osabi)) | |
158 | return; | |
159 | } | |
160 | *name_ptr++ = gdbarch_osabi_name (osabi); | |
161 | *name_ptr = NULL; | |
70f80edf JT |
162 | } |
163 | \f | |
164 | ||
165 | /* Sniffer to find the OS ABI for a given file's architecture and flavour. | |
166 | It is legal to have multiple sniffers for each arch/flavour pair, to | |
167 | disambiguate one OS's a.out from another, for example. The first sniffer | |
168 | to return something other than GDB_OSABI_UNKNOWN wins, so a sniffer should | |
169 | be careful to claim a file only if it knows for sure what it is. */ | |
170 | struct gdb_osabi_sniffer | |
171 | { | |
172 | struct gdb_osabi_sniffer *next; | |
173 | enum bfd_architecture arch; /* bfd_arch_unknown == wildcard */ | |
174 | enum bfd_flavour flavour; | |
175 | enum gdb_osabi (*sniffer)(bfd *); | |
176 | }; | |
177 | ||
178 | static struct gdb_osabi_sniffer *gdb_osabi_sniffer_list; | |
179 | ||
180 | void | |
181 | gdbarch_register_osabi_sniffer (enum bfd_architecture arch, | |
182 | enum bfd_flavour flavour, | |
183 | enum gdb_osabi (*sniffer_fn)(bfd *)) | |
184 | { | |
185 | struct gdb_osabi_sniffer *sniffer; | |
186 | ||
187 | sniffer = | |
188 | (struct gdb_osabi_sniffer *) xmalloc (sizeof (struct gdb_osabi_sniffer)); | |
189 | sniffer->arch = arch; | |
190 | sniffer->flavour = flavour; | |
191 | sniffer->sniffer = sniffer_fn; | |
192 | ||
193 | sniffer->next = gdb_osabi_sniffer_list; | |
194 | gdb_osabi_sniffer_list = sniffer; | |
195 | } | |
196 | \f | |
197 | ||
198 | enum gdb_osabi | |
199 | gdbarch_lookup_osabi (bfd *abfd) | |
200 | { | |
201 | struct gdb_osabi_sniffer *sniffer; | |
202 | enum gdb_osabi osabi, match; | |
203 | int match_specific; | |
204 | ||
b00a8037 DJ |
205 | /* If we aren't in "auto" mode, return the specified OS ABI. */ |
206 | if (user_osabi_state == osabi_user) | |
207 | return user_selected_osabi; | |
208 | ||
209 | /* If we don't have a binary, return the default OS ABI (if set) or | |
210 | an inconclusive result (otherwise). */ | |
211 | if (abfd == NULL) | |
212 | { | |
213 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN) | |
214 | return GDB_OSABI_DEFAULT; | |
215 | else | |
216 | return GDB_OSABI_UNINITIALIZED; | |
217 | } | |
4be87837 | 218 | |
70f80edf JT |
219 | match = GDB_OSABI_UNKNOWN; |
220 | match_specific = 0; | |
221 | ||
222 | for (sniffer = gdb_osabi_sniffer_list; sniffer != NULL; | |
223 | sniffer = sniffer->next) | |
224 | { | |
225 | if ((sniffer->arch == bfd_arch_unknown /* wildcard */ | |
226 | || sniffer->arch == bfd_get_arch (abfd)) | |
227 | && sniffer->flavour == bfd_get_flavour (abfd)) | |
228 | { | |
229 | osabi = (*sniffer->sniffer) (abfd); | |
230 | if (osabi < GDB_OSABI_UNKNOWN || osabi >= GDB_OSABI_INVALID) | |
231 | { | |
232 | internal_error | |
233 | (__FILE__, __LINE__, | |
234 | "gdbarch_lookup_osabi: invalid OS ABI (%d) from sniffer " | |
235 | "for architecture %s flavour %d", | |
236 | (int) osabi, | |
237 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
238 | (int) bfd_get_flavour (abfd)); | |
239 | } | |
240 | else if (osabi != GDB_OSABI_UNKNOWN) | |
241 | { | |
242 | /* A specific sniffer always overrides a generic sniffer. | |
243 | Croak on multiple match if the two matches are of the | |
244 | same class. If the user wishes to continue, we'll use | |
245 | the first match. */ | |
246 | if (match != GDB_OSABI_UNKNOWN) | |
247 | { | |
248 | if ((match_specific && sniffer->arch != bfd_arch_unknown) | |
249 | || (!match_specific && sniffer->arch == bfd_arch_unknown)) | |
250 | { | |
251 | internal_error | |
252 | (__FILE__, __LINE__, | |
253 | "gdbarch_lookup_osabi: multiple %sspecific OS ABI " | |
254 | "match for architecture %s flavour %d: first " | |
255 | "match \"%s\", second match \"%s\"", | |
256 | match_specific ? "" : "non-", | |
257 | bfd_printable_arch_mach (bfd_get_arch (abfd), 0), | |
258 | (int) bfd_get_flavour (abfd), | |
259 | gdbarch_osabi_name (match), | |
260 | gdbarch_osabi_name (osabi)); | |
261 | } | |
262 | else if (sniffer->arch != bfd_arch_unknown) | |
263 | { | |
264 | match = osabi; | |
265 | match_specific = 1; | |
266 | } | |
267 | } | |
268 | else | |
269 | { | |
270 | match = osabi; | |
271 | if (sniffer->arch != bfd_arch_unknown) | |
272 | match_specific = 1; | |
273 | } | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
b00a8037 DJ |
278 | /* If we didn't find a match, but a default was specified at configure |
279 | time, return the default. */ | |
280 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN && match == GDB_OSABI_UNKNOWN) | |
281 | return GDB_OSABI_DEFAULT; | |
282 | else | |
283 | return match; | |
70f80edf JT |
284 | } |
285 | ||
6cfae0bc JB |
286 | |
287 | /* Return non-zero if architecture A can run code written for | |
288 | architecture B. */ | |
289 | static int | |
290 | can_run_code_for (const struct bfd_arch_info *a, const struct bfd_arch_info *b) | |
291 | { | |
292 | /* BFD's 'A->compatible (A, B)' functions return zero if A and B are | |
293 | incompatible. But if they are compatible, it returns the 'more | |
294 | featureful' of the two arches. That is, if A can run code | |
295 | written for B, but B can't run code written for A, then it'll | |
296 | return A. | |
297 | ||
5f724446 AC |
298 | struct bfd_arch_info objects are singletons: that is, there's |
299 | supposed to be exactly one instance for a given machine. So you | |
300 | can tell whether two are equivalent by comparing pointers. */ | |
6cfae0bc JB |
301 | return (a == b || a->compatible (a, b) == a); |
302 | } | |
303 | ||
304 | ||
70f80edf | 305 | void |
4be87837 | 306 | gdbarch_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) |
70f80edf | 307 | { |
05816f70 | 308 | struct gdb_osabi_handler *handler; |
70f80edf | 309 | |
4be87837 | 310 | if (info.osabi == GDB_OSABI_UNKNOWN) |
70f80edf | 311 | { |
01fc4e33 AC |
312 | /* Don't complain about an unknown OSABI. Assume the user knows |
313 | what they are doing. */ | |
70f80edf JT |
314 | return; |
315 | } | |
316 | ||
317 | for (handler = gdb_osabi_handler_list; handler != NULL; | |
318 | handler = handler->next) | |
319 | { | |
4be87837 | 320 | if (handler->osabi != info.osabi) |
05816f70 MK |
321 | continue; |
322 | ||
6cfae0bc JB |
323 | /* If the architecture described by ARCH_INFO can run code for |
324 | the architcture we registered the handler for, then the | |
325 | handler is applicable. Note, though, that if the handler is | |
326 | for an architecture that is a superset of ARCH_INFO, we can't | |
327 | use that --- it would be perfectly correct for it to install | |
328 | gdbarch methods that refer to registers / instructions / | |
329 | other facilities ARCH_INFO doesn't have. | |
05816f70 | 330 | |
6cfae0bc | 331 | NOTE: kettenis/20021027: There may be more than one machine |
05816f70 MK |
332 | type that is compatible with the desired machine type. Right |
333 | now we simply return the first match, which is fine for now. | |
334 | However, we might want to do something smarter in the future. */ | |
5f724446 AC |
335 | /* NOTE: cagney/2003-10-23: The code for "a can_run_code_for b" |
336 | is implemented using BFD's compatible method (a->compatible | |
337 | (b) == a -- the lowest common denominator between a and b is | |
338 | a). That method's definition of compatible may not be as you | |
ce2826aa | 339 | expect. For instance the test "amd64 can run code for i386" |
5f724446 | 340 | (or more generally "64-bit ISA can run code for the 32-bit |
ce2826aa AC |
341 | ISA"). BFD doesn't normally consider 32-bit and 64-bit |
342 | "compatible" so it doesn't succeed. */ | |
931758af | 343 | if (can_run_code_for (info.bfd_arch_info, handler->arch_info)) |
70f80edf JT |
344 | { |
345 | (*handler->init_osabi) (info, gdbarch); | |
346 | return; | |
347 | } | |
348 | } | |
349 | ||
931758af AC |
350 | warning ("A handler for the OS ABI \"%s\" is not built into this " |
351 | "configuration of GDB. " | |
352 | "Attempting to continue with the default %s settings", | |
353 | gdbarch_osabi_name (info.osabi), | |
354 | info.bfd_arch_info->printable_name); | |
70f80edf JT |
355 | } |
356 | \f | |
357 | ||
358 | /* Generic sniffer for ELF flavoured files. */ | |
359 | ||
360 | void | |
361 | generic_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, void *obj) | |
362 | { | |
363 | enum gdb_osabi *os_ident_ptr = obj; | |
364 | const char *name; | |
365 | unsigned int sectsize; | |
366 | ||
367 | name = bfd_get_section_name (abfd, sect); | |
368 | sectsize = bfd_section_size (abfd, sect); | |
369 | ||
370 | /* .note.ABI-tag notes, used by GNU/Linux and FreeBSD. */ | |
371 | if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) | |
372 | { | |
373 | unsigned int name_length, data_length, note_type; | |
374 | char *note; | |
375 | ||
376 | /* If the section is larger than this, it's probably not what we are | |
377 | looking for. */ | |
378 | if (sectsize > 128) | |
379 | sectsize = 128; | |
380 | ||
381 | note = alloca (sectsize); | |
382 | ||
383 | bfd_get_section_contents (abfd, sect, note, | |
384 | (file_ptr) 0, (bfd_size_type) sectsize); | |
385 | ||
386 | name_length = bfd_h_get_32 (abfd, note); | |
387 | data_length = bfd_h_get_32 (abfd, note + 4); | |
388 | note_type = bfd_h_get_32 (abfd, note + 8); | |
389 | ||
390 | if (name_length == 4 && data_length == 16 && note_type == NT_GNU_ABI_TAG | |
391 | && strcmp (note + 12, "GNU") == 0) | |
392 | { | |
393 | int os_number = bfd_h_get_32 (abfd, note + 16); | |
394 | ||
395 | switch (os_number) | |
396 | { | |
397 | case GNU_ABI_TAG_LINUX: | |
398 | *os_ident_ptr = GDB_OSABI_LINUX; | |
399 | break; | |
400 | ||
401 | case GNU_ABI_TAG_HURD: | |
402 | *os_ident_ptr = GDB_OSABI_HURD; | |
403 | break; | |
404 | ||
405 | case GNU_ABI_TAG_SOLARIS: | |
406 | *os_ident_ptr = GDB_OSABI_SOLARIS; | |
407 | break; | |
408 | ||
261de166 AC |
409 | case GNU_ABI_TAG_FREEBSD: |
410 | *os_ident_ptr = GDB_OSABI_FREEBSD_ELF; | |
411 | break; | |
412 | ||
413 | case GNU_ABI_TAG_NETBSD: | |
414 | *os_ident_ptr = GDB_OSABI_NETBSD_ELF; | |
415 | break; | |
416 | ||
70f80edf JT |
417 | default: |
418 | internal_error | |
419 | (__FILE__, __LINE__, | |
420 | "generic_elf_osabi_sniff_abi_tag_sections: unknown OS number %d", | |
421 | os_number); | |
422 | } | |
423 | return; | |
424 | } | |
425 | else if (name_length == 8 && data_length == 4 | |
426 | && note_type == NT_FREEBSD_ABI_TAG | |
427 | && strcmp (note + 12, "FreeBSD") == 0) | |
428 | { | |
429 | /* XXX Should we check the version here? Probably not | |
430 | necessary yet. */ | |
431 | *os_ident_ptr = GDB_OSABI_FREEBSD_ELF; | |
432 | } | |
433 | return; | |
434 | } | |
435 | ||
436 | /* .note.netbsd.ident notes, used by NetBSD. */ | |
437 | if (strcmp (name, ".note.netbsd.ident") == 0 && sectsize > 0) | |
438 | { | |
439 | unsigned int name_length, data_length, note_type; | |
440 | char *note; | |
441 | ||
442 | /* If the section is larger than this, it's probably not what we are | |
443 | looking for. */ | |
444 | if (sectsize > 128) | |
445 | sectsize = 128; | |
446 | ||
447 | note = alloca (sectsize); | |
448 | ||
449 | bfd_get_section_contents (abfd, sect, note, | |
450 | (file_ptr) 0, (bfd_size_type) sectsize); | |
451 | ||
452 | name_length = bfd_h_get_32 (abfd, note); | |
453 | data_length = bfd_h_get_32 (abfd, note + 4); | |
454 | note_type = bfd_h_get_32 (abfd, note + 8); | |
455 | ||
456 | if (name_length == 7 && data_length == 4 && note_type == NT_NETBSD_IDENT | |
457 | && strcmp (note + 12, "NetBSD") == 0) | |
458 | { | |
459 | /* XXX Should we check the version here? Probably not | |
460 | necessary yet. */ | |
461 | *os_ident_ptr = GDB_OSABI_NETBSD_ELF; | |
462 | } | |
463 | return; | |
464 | } | |
465 | } | |
466 | ||
467 | static enum gdb_osabi | |
468 | generic_elf_osabi_sniffer (bfd *abfd) | |
469 | { | |
470 | unsigned int elfosabi; | |
471 | enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; | |
472 | ||
473 | elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; | |
474 | ||
475 | switch (elfosabi) | |
476 | { | |
477 | case ELFOSABI_NONE: | |
478 | /* When elfosabi is ELFOSABI_NONE (0), then the ELF structures in the | |
479 | file are conforming to the base specification for that machine | |
480 | (there are no OS-specific extensions). In order to determine the | |
481 | real OS in use we must look for OS notes that have been added. */ | |
482 | bfd_map_over_sections (abfd, | |
483 | generic_elf_osabi_sniff_abi_tag_sections, | |
484 | &osabi); | |
485 | break; | |
486 | ||
487 | case ELFOSABI_FREEBSD: | |
488 | osabi = GDB_OSABI_FREEBSD_ELF; | |
489 | break; | |
490 | ||
491 | case ELFOSABI_NETBSD: | |
492 | osabi = GDB_OSABI_NETBSD_ELF; | |
493 | break; | |
494 | ||
495 | case ELFOSABI_LINUX: | |
496 | osabi = GDB_OSABI_LINUX; | |
497 | break; | |
498 | ||
499 | case ELFOSABI_HURD: | |
500 | osabi = GDB_OSABI_HURD; | |
501 | break; | |
502 | ||
503 | case ELFOSABI_SOLARIS: | |
504 | osabi = GDB_OSABI_SOLARIS; | |
505 | break; | |
a09a320d JB |
506 | |
507 | case ELFOSABI_HPUX: | |
508 | osabi = GDB_OSABI_HPUX_ELF; | |
509 | break; | |
70f80edf JT |
510 | } |
511 | ||
bb21884d MK |
512 | if (osabi == GDB_OSABI_UNKNOWN) |
513 | { | |
514 | /* The FreeBSD folks have been naughty; they stored the string | |
515 | "FreeBSD" in the padding of the e_ident field of the ELF | |
516 | header to "brand" their ELF binaries in FreeBSD 3.x. */ | |
517 | if (strcmp (&elf_elfheader (abfd)->e_ident[8], "FreeBSD") == 0) | |
518 | osabi = GDB_OSABI_FREEBSD_ELF; | |
519 | } | |
520 | ||
70f80edf JT |
521 | return osabi; |
522 | } | |
523 | \f | |
b00a8037 DJ |
524 | static void |
525 | set_osabi (char *args, int from_tty, struct cmd_list_element *c) | |
526 | { | |
527 | struct gdbarch_info info; | |
70f80edf | 528 | |
b00a8037 DJ |
529 | if (strcmp (set_osabi_string, "auto") == 0) |
530 | user_osabi_state = osabi_auto; | |
531 | else if (strcmp (set_osabi_string, "default") == 0) | |
532 | { | |
533 | user_selected_osabi = GDB_OSABI_DEFAULT; | |
534 | user_osabi_state = osabi_user; | |
535 | } | |
536 | else if (strcmp (set_osabi_string, "none") == 0) | |
537 | { | |
538 | user_selected_osabi = GDB_OSABI_UNKNOWN; | |
539 | user_osabi_state = osabi_user; | |
540 | } | |
541 | else | |
542 | { | |
543 | int i; | |
544 | for (i = 1; i < GDB_OSABI_INVALID; i++) | |
545 | if (strcmp (set_osabi_string, gdbarch_osabi_name (i)) == 0) | |
546 | { | |
547 | user_selected_osabi = i; | |
548 | user_osabi_state = osabi_user; | |
549 | break; | |
550 | } | |
551 | if (i == GDB_OSABI_INVALID) | |
552 | internal_error (__FILE__, __LINE__, | |
553 | "Invalid OS ABI \"%s\" passed to command handler.", | |
554 | set_osabi_string); | |
555 | } | |
556 | ||
557 | /* NOTE: At some point (true multiple architectures) we'll need to be more | |
558 | graceful here. */ | |
559 | gdbarch_info_init (&info); | |
560 | if (! gdbarch_update_p (info)) | |
561 | internal_error (__FILE__, __LINE__, "Updating OS ABI failed."); | |
562 | } | |
563 | ||
b9362cc7 | 564 | static void |
b00a8037 DJ |
565 | show_osabi (char *args, int from_tty) |
566 | { | |
567 | if (user_osabi_state == osabi_auto) | |
568 | printf_filtered ("The current OS ABI is \"auto\" (currently \"%s\").\n", | |
569 | gdbarch_osabi_name (gdbarch_osabi (current_gdbarch))); | |
570 | else | |
571 | printf_filtered ("The current OS ABI is \"%s\".\n", | |
572 | gdbarch_osabi_name (user_selected_osabi)); | |
573 | ||
574 | if (GDB_OSABI_DEFAULT != GDB_OSABI_UNKNOWN) | |
575 | printf_filtered ("The default OS ABI is \"%s\".\n", | |
576 | gdbarch_osabi_name (GDB_OSABI_DEFAULT)); | |
577 | } | |
578 | \f | |
b9362cc7 AC |
579 | extern initialize_file_ftype _initialize_gdb_osabi; /* -Wmissing-prototype */ |
580 | ||
70f80edf JT |
581 | void |
582 | _initialize_gdb_osabi (void) | |
583 | { | |
b00a8037 DJ |
584 | struct cmd_list_element *c; |
585 | ||
70f80edf JT |
586 | if (strcmp (gdb_osabi_names[GDB_OSABI_INVALID], "<invalid>") != 0) |
587 | internal_error | |
588 | (__FILE__, __LINE__, | |
589 | "_initialize_gdb_osabi: gdb_osabi_names[] is inconsistent"); | |
590 | ||
591 | /* Register a generic sniffer for ELF flavoured files. */ | |
592 | gdbarch_register_osabi_sniffer (bfd_arch_unknown, | |
593 | bfd_target_elf_flavour, | |
594 | generic_elf_osabi_sniffer); | |
b00a8037 | 595 | |
b00a8037 DJ |
596 | /* Register the "set osabi" command. */ |
597 | c = add_set_enum_cmd ("osabi", class_support, gdb_osabi_available_names, | |
598 | &set_osabi_string, "Set OS ABI of target.", &setlist); | |
599 | ||
600 | set_cmd_sfunc (c, set_osabi); | |
601 | add_cmd ("osabi", class_support, show_osabi, "Show OS/ABI of target.", | |
602 | &showlist); | |
603 | user_osabi_state = osabi_auto; | |
70f80edf | 604 | } |