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0e5d83e3 JJ |
1 | /* Frame unwinder for frames using the libunwind library. |
2 | ||
6aba47ca | 3 | Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc. |
0e5d83e3 JJ |
4 | |
5 | Written by Jeff Johnston, contributed by Red Hat Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
0e5d83e3 JJ |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
0e5d83e3 JJ |
21 | |
22 | #include "defs.h" | |
23 | ||
24 | #include "inferior.h" | |
25 | #include "frame.h" | |
26 | #include "frame-base.h" | |
27 | #include "frame-unwind.h" | |
28 | #include "gdbcore.h" | |
29 | #include "gdbtypes.h" | |
30 | #include "symtab.h" | |
31 | #include "objfiles.h" | |
32 | #include "regcache.h" | |
33 | ||
34 | #include <dlfcn.h> | |
35 | ||
36 | #include "gdb_assert.h" | |
37 | #include "gdb_string.h" | |
38 | ||
39 | #include "libunwind-frame.h" | |
40 | ||
41 | #include "complaints.h" | |
42 | ||
43 | static int libunwind_initialized; | |
44 | static struct gdbarch_data *libunwind_descr_handle; | |
45 | ||
0e5d83e3 JJ |
46 | /* Required function pointers from libunwind. */ |
47 | static int (*unw_get_reg_p) (unw_cursor_t *, unw_regnum_t, unw_word_t *); | |
48 | static int (*unw_get_fpreg_p) (unw_cursor_t *, unw_regnum_t, unw_fpreg_t *); | |
49 | static int (*unw_get_saveloc_p) (unw_cursor_t *, unw_regnum_t, unw_save_loc_t *); | |
c5a27d9c | 50 | static int (*unw_is_signal_frame_p) (unw_cursor_t *); |
0e5d83e3 JJ |
51 | static int (*unw_step_p) (unw_cursor_t *); |
52 | static int (*unw_init_remote_p) (unw_cursor_t *, unw_addr_space_t, void *); | |
53 | static unw_addr_space_t (*unw_create_addr_space_p) (unw_accessors_t *, int); | |
f43ae3f1 | 54 | static void (*unw_destroy_addr_space_p) (unw_addr_space_t); |
0e5d83e3 JJ |
55 | static int (*unw_search_unwind_table_p) (unw_addr_space_t, unw_word_t, unw_dyn_info_t *, |
56 | unw_proc_info_t *, int, void *); | |
503ff15d KB |
57 | static unw_word_t (*unw_find_dyn_list_p) (unw_addr_space_t, unw_dyn_info_t *, |
58 | void *); | |
0e5d83e3 JJ |
59 | |
60 | ||
61 | struct libunwind_frame_cache | |
62 | { | |
63 | CORE_ADDR base; | |
64 | CORE_ADDR func_addr; | |
65 | unw_cursor_t cursor; | |
272dfcfd | 66 | unw_addr_space_t as; |
0e5d83e3 JJ |
67 | }; |
68 | ||
69 | /* We need to qualify the function names with a platform-specific prefix to match | |
70 | the names used by the libunwind library. The UNW_OBJ macro is provided by the | |
71 | libunwind.h header file. */ | |
72 | #define STRINGIFY2(name) #name | |
73 | #define STRINGIFY(name) STRINGIFY2(name) | |
74 | ||
38e400fa | 75 | #ifndef LIBUNWIND_SO |
70f575cc JK |
76 | /* Use the stable ABI major version number. `libunwind-ia64.so' is a link time |
77 | only library, not a runtime one. */ | |
78 | #define LIBUNWIND_SO "libunwind-" STRINGIFY(UNW_TARGET) ".so.7" | |
38e400fa JJ |
79 | #endif |
80 | ||
0e5d83e3 JJ |
81 | static char *get_reg_name = STRINGIFY(UNW_OBJ(get_reg)); |
82 | static char *get_fpreg_name = STRINGIFY(UNW_OBJ(get_fpreg)); | |
83 | static char *get_saveloc_name = STRINGIFY(UNW_OBJ(get_save_loc)); | |
c5a27d9c | 84 | static char *is_signal_frame_name = STRINGIFY(UNW_OBJ(is_signal_frame)); |
0e5d83e3 JJ |
85 | static char *step_name = STRINGIFY(UNW_OBJ(step)); |
86 | static char *init_remote_name = STRINGIFY(UNW_OBJ(init_remote)); | |
87 | static char *create_addr_space_name = STRINGIFY(UNW_OBJ(create_addr_space)); | |
f43ae3f1 | 88 | static char *destroy_addr_space_name = STRINGIFY(UNW_OBJ(destroy_addr_space)); |
0e5d83e3 JJ |
89 | static char *search_unwind_table_name = STRINGIFY(UNW_OBJ(search_unwind_table)); |
90 | static char *find_dyn_list_name = STRINGIFY(UNW_OBJ(find_dyn_list)); | |
91 | ||
92 | static struct libunwind_descr * | |
93 | libunwind_descr (struct gdbarch *gdbarch) | |
94 | { | |
95 | return gdbarch_data (gdbarch, libunwind_descr_handle); | |
96 | } | |
97 | ||
98 | static void * | |
99 | libunwind_descr_init (struct gdbarch *gdbarch) | |
100 | { | |
101 | struct libunwind_descr *descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, | |
102 | struct libunwind_descr); | |
103 | return descr; | |
104 | } | |
105 | ||
106 | void | |
107 | libunwind_frame_set_descr (struct gdbarch *gdbarch, struct libunwind_descr *descr) | |
108 | { | |
109 | struct libunwind_descr *arch_descr; | |
110 | ||
111 | gdb_assert (gdbarch != NULL); | |
112 | ||
113 | arch_descr = gdbarch_data (gdbarch, libunwind_descr_handle); | |
114 | ||
115 | if (arch_descr == NULL) | |
116 | { | |
117 | /* First time here. Must initialize data area. */ | |
118 | arch_descr = libunwind_descr_init (gdbarch); | |
030f20e1 | 119 | deprecated_set_gdbarch_data (gdbarch, libunwind_descr_handle, arch_descr); |
0e5d83e3 JJ |
120 | } |
121 | ||
122 | /* Copy new descriptor info into arch descriptor. */ | |
123 | arch_descr->gdb2uw = descr->gdb2uw; | |
124 | arch_descr->uw2gdb = descr->uw2gdb; | |
125 | arch_descr->is_fpreg = descr->is_fpreg; | |
126 | arch_descr->accessors = descr->accessors; | |
c5a27d9c | 127 | arch_descr->special_accessors = descr->special_accessors; |
0e5d83e3 JJ |
128 | } |
129 | ||
130 | static struct libunwind_frame_cache * | |
131 | libunwind_frame_cache (struct frame_info *next_frame, void **this_cache) | |
132 | { | |
133 | unw_accessors_t *acc; | |
134 | unw_addr_space_t as; | |
135 | unw_word_t fp; | |
136 | unw_regnum_t uw_sp_regnum; | |
137 | struct libunwind_frame_cache *cache; | |
138 | struct libunwind_descr *descr; | |
8cff2ae6 | 139 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
0e5d83e3 JJ |
140 | int i, ret; |
141 | ||
142 | if (*this_cache) | |
143 | return *this_cache; | |
144 | ||
145 | /* Allocate a new cache. */ | |
146 | cache = FRAME_OBSTACK_ZALLOC (struct libunwind_frame_cache); | |
147 | ||
93d42b30 DJ |
148 | /* We can assume we are unwinding a normal frame. Even if this is |
149 | for a signal trampoline, ia64 signal "trampolines" use a normal | |
150 | subroutine call to start the signal handler. */ | |
151 | cache->func_addr = frame_func_unwind (next_frame, NORMAL_FRAME); | |
c5a27d9c JJ |
152 | if (cache->func_addr == 0 |
153 | && frame_relative_level (next_frame) > 0 | |
154 | && get_frame_type (next_frame) != SIGTRAMP_FRAME) | |
155 | return NULL; | |
0e5d83e3 JJ |
156 | |
157 | /* Get a libunwind cursor to the previous frame. We do this by initializing | |
158 | a cursor. Libunwind treats a new cursor as the top of stack and will get | |
159 | the current register set via the libunwind register accessor. Now, we | |
160 | provide the platform-specific accessors and we set up the register accessor to use | |
161 | the frame register unwinding interfaces so that we properly get the registers for | |
162 | the current frame rather than the top. We then use the unw_step function to | |
163 | move the libunwind cursor back one frame. We can later use this cursor to find previous | |
164 | registers via the unw_get_reg interface which will invoke libunwind's special logic. */ | |
8cff2ae6 | 165 | descr = libunwind_descr (gdbarch); |
0e5d83e3 JJ |
166 | acc = descr->accessors; |
167 | as = unw_create_addr_space_p (acc, | |
8cff2ae6 | 168 | gdbarch_byte_order (gdbarch) |
4c6b5505 | 169 | == BFD_ENDIAN_BIG |
0e5d83e3 JJ |
170 | ? __BIG_ENDIAN |
171 | : __LITTLE_ENDIAN); | |
172 | ||
173 | unw_init_remote_p (&cache->cursor, as, next_frame); | |
c5a27d9c | 174 | if (unw_step_p (&cache->cursor) < 0) |
f43ae3f1 AS |
175 | { |
176 | unw_destroy_addr_space_p (as); | |
177 | return NULL; | |
178 | } | |
0e5d83e3 JJ |
179 | |
180 | /* To get base address, get sp from previous frame. */ | |
8cff2ae6 | 181 | uw_sp_regnum = descr->gdb2uw (gdbarch_sp_regnum (gdbarch)); |
0e5d83e3 JJ |
182 | ret = unw_get_reg_p (&cache->cursor, uw_sp_regnum, &fp); |
183 | if (ret < 0) | |
f43ae3f1 AS |
184 | { |
185 | unw_destroy_addr_space_p (as); | |
186 | error (_("Can't get libunwind sp register.")); | |
187 | } | |
0e5d83e3 JJ |
188 | |
189 | cache->base = (CORE_ADDR)fp; | |
272dfcfd | 190 | cache->as = as; |
0e5d83e3 JJ |
191 | |
192 | *this_cache = cache; | |
193 | return cache; | |
194 | } | |
195 | ||
272dfcfd AS |
196 | void |
197 | libunwind_frame_dealloc_cache (struct frame_info *self, void *this_cache) | |
198 | { | |
199 | struct libunwind_frame_cache *cache = this_cache; | |
200 | if (cache->as) | |
201 | unw_destroy_addr_space_p (cache->as); | |
202 | } | |
203 | ||
503ff15d KB |
204 | unw_word_t |
205 | libunwind_find_dyn_list (unw_addr_space_t as, unw_dyn_info_t *di, void *arg) | |
0e5d83e3 | 206 | { |
503ff15d | 207 | return unw_find_dyn_list_p (as, di, arg); |
0e5d83e3 JJ |
208 | } |
209 | ||
210 | static const struct frame_unwind libunwind_frame_unwind = | |
211 | { | |
212 | NORMAL_FRAME, | |
213 | libunwind_frame_this_id, | |
272dfcfd AS |
214 | libunwind_frame_prev_register, |
215 | NULL, | |
216 | NULL, | |
217 | NULL, | |
218 | libunwind_frame_dealloc_cache | |
0e5d83e3 JJ |
219 | }; |
220 | ||
221 | /* Verify if there is sufficient libunwind information for the frame to use | |
222 | libunwind frame unwinding. */ | |
223 | const struct frame_unwind * | |
224 | libunwind_frame_sniffer (struct frame_info *next_frame) | |
225 | { | |
226 | unw_cursor_t cursor; | |
227 | unw_accessors_t *acc; | |
228 | unw_addr_space_t as; | |
229 | struct libunwind_descr *descr; | |
8cff2ae6 | 230 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
0e5d83e3 JJ |
231 | int i, ret; |
232 | ||
233 | /* To test for libunwind unwind support, initialize a cursor to the current frame and try to back | |
234 | up. We use this same method when setting up the frame cache (see libunwind_frame_cache()). | |
235 | If libunwind returns success for this operation, it means that it has found sufficient | |
236 | libunwind unwinding information to do so. */ | |
237 | ||
8cff2ae6 | 238 | descr = libunwind_descr (gdbarch); |
0e5d83e3 JJ |
239 | acc = descr->accessors; |
240 | as = unw_create_addr_space_p (acc, | |
8cff2ae6 | 241 | gdbarch_byte_order (gdbarch) |
4c6b5505 | 242 | == BFD_ENDIAN_BIG |
0e5d83e3 JJ |
243 | ? __BIG_ENDIAN |
244 | : __LITTLE_ENDIAN); | |
245 | ||
246 | ret = unw_init_remote_p (&cursor, as, next_frame); | |
247 | ||
c5a27d9c | 248 | if (ret < 0) |
f43ae3f1 AS |
249 | { |
250 | unw_destroy_addr_space_p (as); | |
251 | return NULL; | |
252 | } | |
c5a27d9c JJ |
253 | |
254 | ||
255 | /* Check to see if we have libunwind info by checking if we are in a | |
256 | signal frame. If it doesn't return an error, we have libunwind info | |
257 | and can use libunwind. */ | |
258 | ret = unw_is_signal_frame_p (&cursor); | |
f43ae3f1 | 259 | unw_destroy_addr_space_p (as); |
0e5d83e3 JJ |
260 | |
261 | if (ret < 0) | |
262 | return NULL; | |
263 | ||
264 | return &libunwind_frame_unwind; | |
265 | } | |
266 | ||
267 | void | |
268 | libunwind_frame_this_id (struct frame_info *next_frame, void **this_cache, | |
269 | struct frame_id *this_id) | |
270 | { | |
271 | struct libunwind_frame_cache *cache = | |
272 | libunwind_frame_cache (next_frame, this_cache); | |
273 | ||
c5a27d9c JJ |
274 | if (cache != NULL) |
275 | (*this_id) = frame_id_build (cache->base, cache->func_addr); | |
276 | else | |
277 | (*this_id) = null_frame_id; | |
0e5d83e3 JJ |
278 | } |
279 | ||
280 | void | |
281 | libunwind_frame_prev_register (struct frame_info *next_frame, void **this_cache, | |
282 | int regnum, int *optimizedp, | |
283 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
f1b4b38e | 284 | int *realnump, gdb_byte *valuep) |
0e5d83e3 JJ |
285 | { |
286 | struct libunwind_frame_cache *cache = | |
287 | libunwind_frame_cache (next_frame, this_cache); | |
8cff2ae6 | 288 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
0e5d83e3 JJ |
289 | |
290 | void *ptr; | |
291 | unw_cursor_t *c; | |
292 | unw_save_loc_t sl; | |
293 | int i, ret; | |
294 | unw_word_t intval; | |
295 | unw_fpreg_t fpval; | |
296 | unw_regnum_t uw_regnum; | |
297 | struct libunwind_descr *descr; | |
298 | ||
c5a27d9c JJ |
299 | if (cache == NULL) |
300 | return; | |
301 | ||
0e5d83e3 JJ |
302 | /* Convert from gdb register number to libunwind register number. */ |
303 | descr = libunwind_descr (get_frame_arch (next_frame)); | |
304 | uw_regnum = descr->gdb2uw (regnum); | |
305 | ||
306 | gdb_assert (regnum >= 0); | |
307 | ||
308 | if (!target_has_registers) | |
8a3fe4f8 | 309 | error (_("No registers.")); |
0e5d83e3 JJ |
310 | |
311 | *optimizedp = 0; | |
312 | *addrp = 0; | |
313 | *lvalp = not_lval; | |
314 | *realnump = -1; | |
315 | ||
6672f2ae | 316 | if (valuep) |
8cff2ae6 | 317 | memset (valuep, 0, register_size (gdbarch, regnum)); |
0e5d83e3 JJ |
318 | |
319 | if (uw_regnum < 0) | |
320 | return; | |
321 | ||
322 | /* To get the previous register, we use the libunwind register APIs with | |
323 | the cursor we have already pushed back to the previous frame. */ | |
324 | ||
325 | if (descr->is_fpreg (uw_regnum)) | |
326 | { | |
327 | ret = unw_get_fpreg_p (&cache->cursor, uw_regnum, &fpval); | |
328 | ptr = &fpval; | |
329 | } | |
330 | else | |
331 | { | |
332 | ret = unw_get_reg_p (&cache->cursor, uw_regnum, &intval); | |
333 | ptr = &intval; | |
334 | } | |
335 | ||
336 | if (ret < 0) | |
337 | return; | |
338 | ||
6672f2ae | 339 | if (valuep) |
8cff2ae6 | 340 | memcpy (valuep, ptr, register_size (gdbarch, regnum)); |
0e5d83e3 JJ |
341 | |
342 | if (unw_get_saveloc_p (&cache->cursor, uw_regnum, &sl) < 0) | |
343 | return; | |
344 | ||
345 | switch (sl.type) | |
346 | { | |
347 | case UNW_SLT_NONE: | |
348 | *optimizedp = 1; | |
349 | break; | |
350 | ||
351 | case UNW_SLT_MEMORY: | |
352 | *lvalp = lval_memory; | |
353 | *addrp = sl.u.addr; | |
354 | break; | |
355 | ||
356 | case UNW_SLT_REG: | |
357 | *lvalp = lval_register; | |
358 | *realnump = regnum; | |
359 | break; | |
360 | } | |
361 | } | |
362 | ||
363 | CORE_ADDR | |
364 | libunwind_frame_base_address (struct frame_info *next_frame, void **this_cache) | |
365 | { | |
366 | struct libunwind_frame_cache *cache = | |
367 | libunwind_frame_cache (next_frame, this_cache); | |
368 | ||
c5a27d9c JJ |
369 | if (cache == NULL) |
370 | return (CORE_ADDR)NULL; | |
0e5d83e3 JJ |
371 | return cache->base; |
372 | } | |
373 | ||
374 | /* The following is a glue routine to call the libunwind unwind table | |
375 | search function to get unwind information for a specified ip address. */ | |
376 | int | |
377 | libunwind_search_unwind_table (void *as, long ip, void *di, | |
378 | void *pi, int need_unwind_info, void *args) | |
379 | { | |
380 | return unw_search_unwind_table_p (*(unw_addr_space_t *)as, (unw_word_t )ip, | |
381 | di, pi, need_unwind_info, args); | |
382 | } | |
383 | ||
c5a27d9c JJ |
384 | /* Verify if we are in a sigtramp frame and we can use libunwind to unwind. */ |
385 | const struct frame_unwind * | |
386 | libunwind_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
387 | { | |
388 | unw_cursor_t cursor; | |
389 | unw_accessors_t *acc; | |
390 | unw_addr_space_t as; | |
391 | struct libunwind_descr *descr; | |
8cff2ae6 | 392 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
c5a27d9c JJ |
393 | int i, ret; |
394 | ||
395 | /* To test for libunwind unwind support, initialize a cursor to the | |
396 | current frame and try to back up. We use this same method when | |
397 | setting up the frame cache (see libunwind_frame_cache()). If | |
398 | libunwind returns success for this operation, it means that it | |
399 | has found sufficient libunwind unwinding information to do | |
400 | so. */ | |
401 | ||
8cff2ae6 | 402 | descr = libunwind_descr (gdbarch); |
c5a27d9c JJ |
403 | acc = descr->accessors; |
404 | as = unw_create_addr_space_p (acc, | |
8cff2ae6 | 405 | gdbarch_byte_order (gdbarch) |
4c6b5505 | 406 | == BFD_ENDIAN_BIG |
c5a27d9c JJ |
407 | ? __BIG_ENDIAN |
408 | : __LITTLE_ENDIAN); | |
409 | ||
410 | ret = unw_init_remote_p (&cursor, as, next_frame); | |
411 | ||
412 | if (ret < 0) | |
f43ae3f1 AS |
413 | { |
414 | unw_destroy_addr_space_p (as); | |
415 | return NULL; | |
416 | } | |
c5a27d9c JJ |
417 | |
418 | /* Check to see if we are in a signal frame. */ | |
419 | ret = unw_is_signal_frame_p (&cursor); | |
f43ae3f1 | 420 | unw_destroy_addr_space_p (as); |
c5a27d9c JJ |
421 | if (ret > 0) |
422 | return &libunwind_frame_unwind; | |
423 | ||
424 | return NULL; | |
425 | } | |
426 | ||
427 | /* The following routine is for accessing special registers of the top frame. | |
428 | A special set of accessors must be given that work without frame info. | |
429 | This is used by ia64 to access the rse registers r32-r127. While they | |
430 | are usually located at BOF, this is not always true and only the libunwind | |
431 | info can decipher where they actually are. */ | |
432 | int | |
45ecac4b UW |
433 | libunwind_get_reg_special (struct gdbarch *gdbarch, struct regcache *regcache, |
434 | int regnum, void *buf) | |
c5a27d9c JJ |
435 | { |
436 | unw_cursor_t cursor; | |
437 | unw_accessors_t *acc; | |
438 | unw_addr_space_t as; | |
439 | struct libunwind_descr *descr; | |
440 | int ret; | |
441 | unw_regnum_t uw_regnum; | |
442 | unw_word_t intval; | |
443 | unw_fpreg_t fpval; | |
444 | void *ptr; | |
445 | ||
446 | ||
447 | descr = libunwind_descr (gdbarch); | |
448 | acc = descr->special_accessors; | |
449 | as = unw_create_addr_space_p (acc, | |
8cff2ae6 | 450 | gdbarch_byte_order (gdbarch) |
4c6b5505 | 451 | == BFD_ENDIAN_BIG |
c5a27d9c JJ |
452 | ? __BIG_ENDIAN |
453 | : __LITTLE_ENDIAN); | |
454 | ||
45ecac4b | 455 | ret = unw_init_remote_p (&cursor, as, regcache); |
c5a27d9c | 456 | if (ret < 0) |
f43ae3f1 AS |
457 | { |
458 | unw_destroy_addr_space_p (as); | |
459 | return -1; | |
460 | } | |
c5a27d9c JJ |
461 | |
462 | uw_regnum = descr->gdb2uw (regnum); | |
463 | ||
464 | if (descr->is_fpreg (uw_regnum)) | |
465 | { | |
466 | ret = unw_get_fpreg_p (&cursor, uw_regnum, &fpval); | |
467 | ptr = &fpval; | |
468 | } | |
469 | else | |
470 | { | |
471 | ret = unw_get_reg_p (&cursor, uw_regnum, &intval); | |
472 | ptr = &intval; | |
473 | } | |
474 | ||
f43ae3f1 AS |
475 | unw_destroy_addr_space_p (as); |
476 | ||
c5a27d9c JJ |
477 | if (ret < 0) |
478 | return -1; | |
479 | ||
480 | if (buf) | |
8cff2ae6 | 481 | memcpy (buf, ptr, register_size (gdbarch, regnum)); |
c5a27d9c JJ |
482 | |
483 | return 0; | |
484 | } | |
485 | ||
0e5d83e3 JJ |
486 | static int |
487 | libunwind_load (void) | |
488 | { | |
489 | void *handle; | |
490 | ||
491 | handle = dlopen (LIBUNWIND_SO, RTLD_NOW); | |
492 | if (handle == NULL) | |
493 | return 0; | |
494 | ||
495 | /* Initialize pointers to the dynamic library functions we will use. */ | |
496 | ||
497 | unw_get_reg_p = dlsym (handle, get_reg_name); | |
498 | if (unw_get_reg_p == NULL) | |
499 | return 0; | |
500 | ||
501 | unw_get_fpreg_p = dlsym (handle, get_fpreg_name); | |
502 | if (unw_get_fpreg_p == NULL) | |
503 | return 0; | |
504 | ||
505 | unw_get_saveloc_p = dlsym (handle, get_saveloc_name); | |
506 | if (unw_get_saveloc_p == NULL) | |
507 | return 0; | |
508 | ||
c5a27d9c JJ |
509 | unw_is_signal_frame_p = dlsym (handle, is_signal_frame_name); |
510 | if (unw_is_signal_frame_p == NULL) | |
511 | return 0; | |
512 | ||
0e5d83e3 JJ |
513 | unw_step_p = dlsym (handle, step_name); |
514 | if (unw_step_p == NULL) | |
515 | return 0; | |
516 | ||
517 | unw_init_remote_p = dlsym (handle, init_remote_name); | |
518 | if (unw_init_remote_p == NULL) | |
519 | return 0; | |
520 | ||
521 | unw_create_addr_space_p = dlsym (handle, create_addr_space_name); | |
522 | if (unw_create_addr_space_p == NULL) | |
523 | return 0; | |
524 | ||
f43ae3f1 AS |
525 | unw_destroy_addr_space_p = dlsym (handle, destroy_addr_space_name); |
526 | if (unw_destroy_addr_space_p == NULL) | |
527 | return 0; | |
528 | ||
0e5d83e3 JJ |
529 | unw_search_unwind_table_p = dlsym (handle, search_unwind_table_name); |
530 | if (unw_search_unwind_table_p == NULL) | |
531 | return 0; | |
532 | ||
533 | unw_find_dyn_list_p = dlsym (handle, find_dyn_list_name); | |
534 | if (unw_find_dyn_list_p == NULL) | |
535 | return 0; | |
536 | ||
537 | return 1; | |
538 | } | |
539 | ||
540 | int | |
541 | libunwind_is_initialized (void) | |
542 | { | |
543 | return libunwind_initialized; | |
544 | } | |
545 | ||
546 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
547 | void _initialize_libunwind_frame (void); | |
548 | ||
549 | void | |
550 | _initialize_libunwind_frame (void) | |
551 | { | |
030f20e1 | 552 | libunwind_descr_handle = gdbarch_data_register_post_init (libunwind_descr_init); |
0e5d83e3 JJ |
553 | |
554 | libunwind_initialized = libunwind_load (); | |
555 | } |