Commit | Line | Data |
---|---|---|
4f460812 | 1 | /* Cache and manage frames for GDB, the GNU debugger. |
96cb11df AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, | |
51603483 | 4 | 2001, 2002, 2003 Free Software Foundation, Inc. |
d65fe839 AC |
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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
24 | #include "frame.h" | |
25 | #include "target.h" | |
26 | #include "value.h" | |
39f77062 | 27 | #include "inferior.h" /* for inferior_ptid */ |
4e052eda | 28 | #include "regcache.h" |
4f460812 | 29 | #include "gdb_assert.h" |
e36180d7 AC |
30 | #include "gdb_string.h" |
31 | #include "builtin-regs.h" | |
4c1e7e9d AC |
32 | #include "gdb_obstack.h" |
33 | #include "dummy-frame.h" | |
a94dd1fd | 34 | #include "sentinel-frame.h" |
4c1e7e9d AC |
35 | #include "gdbcore.h" |
36 | #include "annotate.h" | |
6e7f8b9c | 37 | #include "language.h" |
494cca16 | 38 | #include "frame-unwind.h" |
eb4f72c5 AC |
39 | #include "command.h" |
40 | #include "gdbcmd.h" | |
41 | ||
42 | /* Flag to indicate whether backtraces should stop at main. */ | |
43 | ||
44 | static int backtrace_below_main; | |
d65fe839 | 45 | |
7a424e99 | 46 | /* Return a frame uniq ID that can be used to, later, re-find the |
101dcfbe AC |
47 | frame. */ |
48 | ||
7a424e99 AC |
49 | struct frame_id |
50 | get_frame_id (struct frame_info *fi) | |
101dcfbe AC |
51 | { |
52 | if (fi == NULL) | |
53 | { | |
7a424e99 | 54 | return null_frame_id; |
101dcfbe AC |
55 | } |
56 | else | |
57 | { | |
7a424e99 AC |
58 | struct frame_id id; |
59 | id.base = fi->frame; | |
60 | id.pc = fi->pc; | |
61 | return id; | |
101dcfbe AC |
62 | } |
63 | } | |
64 | ||
7a424e99 AC |
65 | const struct frame_id null_frame_id; /* All zeros. */ |
66 | ||
67 | struct frame_id | |
68 | frame_id_build (CORE_ADDR base, CORE_ADDR func_or_pc) | |
69 | { | |
70 | struct frame_id id; | |
71 | id.base = base; | |
72 | id.pc = func_or_pc; | |
73 | return id; | |
74 | } | |
75 | ||
76 | int | |
77 | frame_id_p (struct frame_id l) | |
78 | { | |
79 | /* The .func can be NULL but the .base cannot. */ | |
80 | return (l.base != 0); | |
81 | } | |
82 | ||
83 | int | |
84 | frame_id_eq (struct frame_id l, struct frame_id r) | |
85 | { | |
86 | /* If .base is different, the frames are different. */ | |
87 | if (l.base != r.base) | |
88 | return 0; | |
89 | /* Add a test to check that the frame ID's are for the same function | |
90 | here. */ | |
91 | return 1; | |
92 | } | |
93 | ||
94 | int | |
95 | frame_id_inner (struct frame_id l, struct frame_id r) | |
96 | { | |
97 | /* Only return non-zero when strictly inner than. Note that, per | |
98 | comment in "frame.h", there is some fuzz here. Frameless | |
99 | functions are not strictly inner than (same .base but different | |
100 | .func). */ | |
101 | return INNER_THAN (l.base, r.base); | |
102 | } | |
103 | ||
101dcfbe AC |
104 | struct frame_info * |
105 | frame_find_by_id (struct frame_id id) | |
106 | { | |
107 | struct frame_info *frame; | |
108 | ||
109 | /* ZERO denotes the null frame, let the caller decide what to do | |
110 | about it. Should it instead return get_current_frame()? */ | |
7a424e99 | 111 | if (!frame_id_p (id)) |
101dcfbe AC |
112 | return NULL; |
113 | ||
114 | for (frame = get_current_frame (); | |
115 | frame != NULL; | |
116 | frame = get_prev_frame (frame)) | |
117 | { | |
7a424e99 AC |
118 | struct frame_id this = get_frame_id (frame); |
119 | if (frame_id_eq (id, this)) | |
120 | /* An exact match. */ | |
121 | return frame; | |
122 | if (frame_id_inner (id, this)) | |
123 | /* Gone to far. */ | |
101dcfbe | 124 | return NULL; |
7a424e99 AC |
125 | /* Either, we're not yet gone far enough out along the frame |
126 | chain (inner(this,id), or we're comparing frameless functions | |
127 | (same .base, different .func, no test available). Struggle | |
128 | on until we've definitly gone to far. */ | |
101dcfbe AC |
129 | } |
130 | return NULL; | |
131 | } | |
132 | ||
f18c5a73 AC |
133 | CORE_ADDR |
134 | frame_pc_unwind (struct frame_info *frame) | |
135 | { | |
136 | if (!frame->pc_unwind_cache_p) | |
137 | { | |
494cca16 | 138 | frame->pc_unwind_cache = frame->unwind->pc (frame, &frame->unwind_cache); |
f18c5a73 AC |
139 | frame->pc_unwind_cache_p = 1; |
140 | } | |
141 | return frame->pc_unwind_cache; | |
142 | } | |
143 | ||
c689142b AC |
144 | struct frame_id |
145 | frame_id_unwind (struct frame_info *frame) | |
146 | { | |
147 | if (!frame->id_unwind_cache_p) | |
148 | { | |
494cca16 | 149 | frame->unwind->id (frame, &frame->unwind_cache, &frame->id_unwind_cache); |
c689142b AC |
150 | frame->id_unwind_cache_p = 1; |
151 | } | |
152 | return frame->id_unwind_cache; | |
153 | } | |
154 | ||
dbe9fe58 AC |
155 | void |
156 | frame_pop (struct frame_info *frame) | |
157 | { | |
158 | /* FIXME: cagney/2003-01-18: There is probably a chicken-egg problem | |
159 | with passing in current_regcache. The pop function needs to be | |
160 | written carefully so as to not overwrite registers whose [old] | |
161 | values are needed to restore other registers. Instead, this code | |
162 | should pass in a scratch cache and, as a second step, restore the | |
163 | registers using that. */ | |
164 | frame->unwind->pop (frame, &frame->unwind_cache, current_regcache); | |
165 | flush_cached_frames (); | |
166 | } | |
c689142b | 167 | |
4f460812 AC |
168 | void |
169 | frame_register_unwind (struct frame_info *frame, int regnum, | |
170 | int *optimizedp, enum lval_type *lvalp, | |
171 | CORE_ADDR *addrp, int *realnump, void *bufferp) | |
172 | { | |
173 | struct frame_unwind_cache *cache; | |
174 | ||
175 | /* Require all but BUFFERP to be valid. A NULL BUFFERP indicates | |
176 | that the value proper does not need to be fetched. */ | |
177 | gdb_assert (optimizedp != NULL); | |
178 | gdb_assert (lvalp != NULL); | |
179 | gdb_assert (addrp != NULL); | |
180 | gdb_assert (realnump != NULL); | |
181 | /* gdb_assert (bufferp != NULL); */ | |
182 | ||
a94dd1fd AC |
183 | /* NOTE: cagney/2002-11-27: A program trying to unwind a NULL frame |
184 | is broken. There is always a frame. If there, for some reason, | |
185 | isn't, there is some pretty busted code as it should have | |
186 | detected the problem before calling here. */ | |
187 | gdb_assert (frame != NULL); | |
4f460812 AC |
188 | |
189 | /* Ask this frame to unwind its register. */ | |
494cca16 AC |
190 | frame->unwind->reg (frame, &frame->unwind_cache, regnum, |
191 | optimizedp, lvalp, addrp, realnump, bufferp); | |
4f460812 AC |
192 | } |
193 | ||
a216a322 AC |
194 | void |
195 | frame_register (struct frame_info *frame, int regnum, | |
196 | int *optimizedp, enum lval_type *lvalp, | |
197 | CORE_ADDR *addrp, int *realnump, void *bufferp) | |
198 | { | |
199 | /* Require all but BUFFERP to be valid. A NULL BUFFERP indicates | |
200 | that the value proper does not need to be fetched. */ | |
201 | gdb_assert (optimizedp != NULL); | |
202 | gdb_assert (lvalp != NULL); | |
203 | gdb_assert (addrp != NULL); | |
204 | gdb_assert (realnump != NULL); | |
205 | /* gdb_assert (bufferp != NULL); */ | |
206 | ||
207 | /* Ulgh! Old code that, for lval_register, sets ADDRP to the offset | |
208 | of the register in the register cache. It should instead return | |
209 | the REGNUM corresponding to that register. Translate the . */ | |
210 | if (GET_SAVED_REGISTER_P ()) | |
211 | { | |
212 | GET_SAVED_REGISTER (bufferp, optimizedp, addrp, frame, regnum, lvalp); | |
213 | /* Compute the REALNUM if the caller wants it. */ | |
214 | if (*lvalp == lval_register) | |
215 | { | |
216 | int regnum; | |
217 | for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) | |
218 | { | |
219 | if (*addrp == register_offset_hack (current_gdbarch, regnum)) | |
220 | { | |
221 | *realnump = regnum; | |
222 | return; | |
223 | } | |
224 | } | |
225 | internal_error (__FILE__, __LINE__, | |
226 | "Failed to compute the register number corresponding" | |
227 | " to 0x%s", paddr_d (*addrp)); | |
228 | } | |
229 | *realnump = -1; | |
230 | return; | |
231 | } | |
232 | ||
a94dd1fd AC |
233 | /* Obtain the register value by unwinding the register from the next |
234 | (more inner frame). */ | |
235 | gdb_assert (frame != NULL && frame->next != NULL); | |
236 | frame_register_unwind (frame->next, regnum, optimizedp, lvalp, addrp, | |
237 | realnump, bufferp); | |
a216a322 AC |
238 | } |
239 | ||
135c175f AC |
240 | void |
241 | frame_unwind_signed_register (struct frame_info *frame, int regnum, | |
242 | LONGEST *val) | |
243 | { | |
244 | int optimized; | |
245 | CORE_ADDR addr; | |
246 | int realnum; | |
247 | enum lval_type lval; | |
248 | void *buf = alloca (MAX_REGISTER_RAW_SIZE); | |
249 | frame_register_unwind (frame, regnum, &optimized, &lval, &addr, | |
250 | &realnum, buf); | |
251 | (*val) = extract_signed_integer (buf, REGISTER_VIRTUAL_SIZE (regnum)); | |
252 | } | |
253 | ||
254 | void | |
255 | frame_unwind_unsigned_register (struct frame_info *frame, int regnum, | |
256 | ULONGEST *val) | |
257 | { | |
258 | int optimized; | |
259 | CORE_ADDR addr; | |
260 | int realnum; | |
261 | enum lval_type lval; | |
262 | void *buf = alloca (MAX_REGISTER_RAW_SIZE); | |
263 | frame_register_unwind (frame, regnum, &optimized, &lval, &addr, | |
264 | &realnum, buf); | |
265 | (*val) = extract_unsigned_integer (buf, REGISTER_VIRTUAL_SIZE (regnum)); | |
266 | } | |
4f460812 | 267 | |
f908a0eb AC |
268 | void |
269 | frame_read_unsigned_register (struct frame_info *frame, int regnum, | |
270 | ULONGEST *val) | |
271 | { | |
272 | /* NOTE: cagney/2002-10-31: There is a bit of dogma here - there is | |
273 | always a frame. Both this, and the equivalent | |
274 | frame_read_signed_register() function, can only be called with a | |
275 | valid frame. If, for some reason, this function is called | |
276 | without a frame then the problem isn't here, but rather in the | |
277 | caller. It should of first created a frame and then passed that | |
278 | in. */ | |
279 | /* NOTE: cagney/2002-10-31: As a side bar, keep in mind that the | |
280 | ``current_frame'' should not be treated as a special case. While | |
281 | ``get_next_frame (current_frame) == NULL'' currently holds, it | |
282 | should, as far as possible, not be relied upon. In the future, | |
283 | ``get_next_frame (current_frame)'' may instead simply return a | |
284 | normal frame object that simply always gets register values from | |
285 | the register cache. Consequently, frame code should try to avoid | |
286 | tests like ``if get_next_frame() == NULL'' and instead just rely | |
287 | on recursive frame calls (like the below code) when manipulating | |
288 | a frame chain. */ | |
a94dd1fd AC |
289 | gdb_assert (frame != NULL && frame->next != NULL); |
290 | frame_unwind_unsigned_register (frame->next, regnum, val); | |
f908a0eb AC |
291 | } |
292 | ||
293 | void | |
294 | frame_read_signed_register (struct frame_info *frame, int regnum, | |
295 | LONGEST *val) | |
296 | { | |
a94dd1fd AC |
297 | /* See note above in frame_read_unsigned_register(). */ |
298 | gdb_assert (frame != NULL && frame->next != NULL); | |
299 | frame_unwind_signed_register (frame->next, regnum, val); | |
f908a0eb AC |
300 | } |
301 | ||
18cde8d5 | 302 | static void |
4f460812 AC |
303 | generic_unwind_get_saved_register (char *raw_buffer, |
304 | int *optimizedp, | |
305 | CORE_ADDR *addrp, | |
306 | struct frame_info *frame, | |
307 | int regnum, | |
308 | enum lval_type *lvalp) | |
309 | { | |
310 | int optimizedx; | |
311 | CORE_ADDR addrx; | |
312 | int realnumx; | |
313 | enum lval_type lvalx; | |
314 | ||
315 | if (!target_has_registers) | |
316 | error ("No registers."); | |
317 | ||
318 | /* Keep things simple, ensure that all the pointers (except valuep) | |
319 | are non NULL. */ | |
320 | if (optimizedp == NULL) | |
321 | optimizedp = &optimizedx; | |
322 | if (lvalp == NULL) | |
323 | lvalp = &lvalx; | |
324 | if (addrp == NULL) | |
325 | addrp = &addrx; | |
326 | ||
a94dd1fd AC |
327 | gdb_assert (frame != NULL && frame->next != NULL); |
328 | frame_register_unwind (frame->next, regnum, optimizedp, lvalp, addrp, | |
329 | &realnumx, raw_buffer); | |
4f460812 AC |
330 | } |
331 | ||
d65fe839 AC |
332 | void |
333 | get_saved_register (char *raw_buffer, | |
334 | int *optimized, | |
335 | CORE_ADDR *addrp, | |
336 | struct frame_info *frame, | |
337 | int regnum, | |
338 | enum lval_type *lval) | |
339 | { | |
a216a322 AC |
340 | if (GET_SAVED_REGISTER_P ()) |
341 | { | |
342 | GET_SAVED_REGISTER (raw_buffer, optimized, addrp, frame, regnum, lval); | |
343 | return; | |
344 | } | |
345 | generic_unwind_get_saved_register (raw_buffer, optimized, addrp, frame, | |
346 | regnum, lval); | |
d65fe839 AC |
347 | } |
348 | ||
cda5a58a | 349 | /* frame_register_read () |
d65fe839 | 350 | |
cda5a58a | 351 | Find and return the value of REGNUM for the specified stack frame. |
d65fe839 AC |
352 | The number of bytes copied is REGISTER_RAW_SIZE (REGNUM). |
353 | ||
cda5a58a | 354 | Returns 0 if the register value could not be found. */ |
d65fe839 | 355 | |
cda5a58a AC |
356 | int |
357 | frame_register_read (struct frame_info *frame, int regnum, void *myaddr) | |
d65fe839 | 358 | { |
a216a322 AC |
359 | int optimized; |
360 | enum lval_type lval; | |
361 | CORE_ADDR addr; | |
362 | int realnum; | |
363 | frame_register (frame, regnum, &optimized, &lval, &addr, &realnum, myaddr); | |
d65fe839 | 364 | |
c97dcfc7 AC |
365 | /* FIXME: cagney/2002-05-15: This test, is just bogus. |
366 | ||
367 | It indicates that the target failed to supply a value for a | |
368 | register because it was "not available" at this time. Problem | |
369 | is, the target still has the register and so get saved_register() | |
370 | may be returning a value saved on the stack. */ | |
371 | ||
d65fe839 | 372 | if (register_cached (regnum) < 0) |
cda5a58a | 373 | return 0; /* register value not available */ |
d65fe839 | 374 | |
a216a322 | 375 | return !optimized; |
d65fe839 | 376 | } |
e36180d7 AC |
377 | |
378 | ||
379 | /* Map between a frame register number and its name. A frame register | |
380 | space is a superset of the cooked register space --- it also | |
381 | includes builtin registers. */ | |
382 | ||
383 | int | |
384 | frame_map_name_to_regnum (const char *name, int len) | |
385 | { | |
386 | int i; | |
387 | ||
388 | /* Search register name space. */ | |
389 | for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) | |
390 | if (REGISTER_NAME (i) && len == strlen (REGISTER_NAME (i)) | |
391 | && strncmp (name, REGISTER_NAME (i), len) == 0) | |
392 | { | |
393 | return i; | |
394 | } | |
395 | ||
396 | /* Try builtin registers. */ | |
397 | i = builtin_reg_map_name_to_regnum (name, len); | |
398 | if (i >= 0) | |
399 | { | |
400 | /* A builtin register doesn't fall into the architecture's | |
401 | register range. */ | |
402 | gdb_assert (i >= NUM_REGS + NUM_PSEUDO_REGS); | |
403 | return i; | |
404 | } | |
405 | ||
406 | return -1; | |
407 | } | |
408 | ||
409 | const char * | |
410 | frame_map_regnum_to_name (int regnum) | |
411 | { | |
412 | if (regnum < 0) | |
413 | return NULL; | |
414 | if (regnum < NUM_REGS + NUM_PSEUDO_REGS) | |
415 | return REGISTER_NAME (regnum); | |
416 | return builtin_reg_map_regnum_to_name (regnum); | |
417 | } | |
4c1e7e9d | 418 | |
a94dd1fd AC |
419 | /* Create a sentinel frame. */ |
420 | ||
421 | struct frame_info * | |
422 | create_sentinel_frame (struct regcache *regcache) | |
423 | { | |
424 | struct frame_info *frame = FRAME_OBSTACK_ZALLOC (struct frame_info); | |
425 | frame->type = NORMAL_FRAME; | |
426 | frame->level = -1; | |
427 | /* Explicitly initialize the sentinel frame's cache. Provide it | |
428 | with the underlying regcache. In the future additional | |
429 | information, such as the frame's thread will be added. */ | |
430 | frame->unwind_cache = sentinel_frame_cache (regcache); | |
431 | /* For the moment there is only one sentinel frame implementation. */ | |
432 | frame->unwind = sentinel_frame_unwind; | |
433 | /* Link this frame back to itself. The frame is self referential | |
434 | (the unwound PC is the same as the pc), so make it so. */ | |
435 | frame->next = frame; | |
436 | /* Always unwind the PC as part of creating this frame. This | |
437 | ensures that the frame's PC points at something valid. */ | |
438 | /* FIXME: cagney/2003-01-10: Problem here. Unwinding a sentinel | |
439 | frame's PC may require information such as the frame's thread's | |
440 | stop reason. Is it possible to get to that? */ | |
441 | frame->pc = frame_pc_unwind (frame); | |
442 | return frame; | |
443 | } | |
444 | ||
4c1e7e9d AC |
445 | /* Info about the innermost stack frame (contents of FP register) */ |
446 | ||
447 | static struct frame_info *current_frame; | |
448 | ||
449 | /* Cache for frame addresses already read by gdb. Valid only while | |
450 | inferior is stopped. Control variables for the frame cache should | |
451 | be local to this module. */ | |
452 | ||
453 | static struct obstack frame_cache_obstack; | |
454 | ||
455 | void * | |
479ab5a0 | 456 | frame_obstack_zalloc (unsigned long size) |
4c1e7e9d | 457 | { |
479ab5a0 AC |
458 | void *data = obstack_alloc (&frame_cache_obstack, size); |
459 | memset (data, 0, size); | |
460 | return data; | |
4c1e7e9d AC |
461 | } |
462 | ||
6baff1d2 | 463 | CORE_ADDR * |
4c1e7e9d AC |
464 | frame_saved_regs_zalloc (struct frame_info *fi) |
465 | { | |
466 | fi->saved_regs = (CORE_ADDR *) | |
479ab5a0 | 467 | frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS); |
6baff1d2 | 468 | return fi->saved_regs; |
4c1e7e9d AC |
469 | } |
470 | ||
6baff1d2 AC |
471 | CORE_ADDR * |
472 | get_frame_saved_regs (struct frame_info *fi) | |
473 | { | |
474 | return fi->saved_regs; | |
475 | } | |
4c1e7e9d | 476 | |
a94dd1fd AC |
477 | /* Return the innermost (currently executing) stack frame. This is |
478 | split into two functions. The function unwind_to_current_frame() | |
479 | is wrapped in catch exceptions so that, even when the unwind of the | |
480 | sentinel frame fails, the function still returns a stack frame. */ | |
481 | ||
482 | static int | |
483 | unwind_to_current_frame (struct ui_out *ui_out, void *args) | |
484 | { | |
485 | struct frame_info *frame = get_prev_frame (args); | |
486 | /* A sentinel frame can fail to unwind, eg, because it's PC value | |
487 | lands in somewhere like start. */ | |
488 | if (frame == NULL) | |
489 | return 1; | |
490 | current_frame = frame; | |
491 | return 0; | |
492 | } | |
4c1e7e9d AC |
493 | |
494 | struct frame_info * | |
495 | get_current_frame (void) | |
496 | { | |
a94dd1fd AC |
497 | if (!target_has_stack) |
498 | error ("No stack."); | |
499 | if (!target_has_registers) | |
500 | error ("No registers."); | |
501 | if (!target_has_memory) | |
502 | error ("No memory."); | |
4c1e7e9d AC |
503 | if (current_frame == NULL) |
504 | { | |
a94dd1fd AC |
505 | struct frame_info *sentinel_frame = |
506 | create_sentinel_frame (current_regcache); | |
507 | if (catch_exceptions (uiout, unwind_to_current_frame, sentinel_frame, | |
508 | NULL, RETURN_MASK_ERROR) != 0) | |
509 | { | |
510 | /* Oops! Fake a current frame? Is this useful? It has a PC | |
511 | of zero, for instance. */ | |
512 | current_frame = sentinel_frame; | |
513 | } | |
4c1e7e9d AC |
514 | } |
515 | return current_frame; | |
516 | } | |
517 | ||
6e7f8b9c AC |
518 | /* The "selected" stack frame is used by default for local and arg |
519 | access. May be zero, for no selected frame. */ | |
520 | ||
521 | struct frame_info *deprecated_selected_frame; | |
522 | ||
523 | /* Return the selected frame. Always non-null (unless there isn't an | |
524 | inferior sufficient for creating a frame) in which case an error is | |
525 | thrown. */ | |
526 | ||
527 | struct frame_info * | |
528 | get_selected_frame (void) | |
529 | { | |
530 | if (deprecated_selected_frame == NULL) | |
531 | /* Hey! Don't trust this. It should really be re-finding the | |
532 | last selected frame of the currently selected thread. This, | |
533 | though, is better than nothing. */ | |
534 | select_frame (get_current_frame ()); | |
535 | /* There is always a frame. */ | |
536 | gdb_assert (deprecated_selected_frame != NULL); | |
537 | return deprecated_selected_frame; | |
538 | } | |
539 | ||
540 | /* Select frame FI (or NULL - to invalidate the current frame). */ | |
541 | ||
542 | void | |
543 | select_frame (struct frame_info *fi) | |
544 | { | |
545 | register struct symtab *s; | |
546 | ||
547 | deprecated_selected_frame = fi; | |
548 | /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the | |
549 | frame is being invalidated. */ | |
550 | if (selected_frame_level_changed_hook) | |
551 | selected_frame_level_changed_hook (frame_relative_level (fi)); | |
552 | ||
553 | /* FIXME: kseitz/2002-08-28: It would be nice to call | |
554 | selected_frame_level_changed_event right here, but due to limitations | |
555 | in the current interfaces, we would end up flooding UIs with events | |
556 | because select_frame is used extensively internally. | |
557 | ||
558 | Once we have frame-parameterized frame (and frame-related) commands, | |
559 | the event notification can be moved here, since this function will only | |
560 | be called when the users selected frame is being changed. */ | |
561 | ||
562 | /* Ensure that symbols for this frame are read in. Also, determine the | |
563 | source language of this frame, and switch to it if desired. */ | |
564 | if (fi) | |
565 | { | |
566 | s = find_pc_symtab (fi->pc); | |
567 | if (s | |
568 | && s->language != current_language->la_language | |
569 | && s->language != language_unknown | |
570 | && language_mode == language_mode_auto) | |
571 | { | |
572 | set_language (s->language); | |
573 | } | |
574 | } | |
575 | } | |
576 | ||
4c1e7e9d AC |
577 | /* Return the register saved in the simplistic ``saved_regs'' cache. |
578 | If the value isn't here AND a value is needed, try the next inner | |
579 | most frame. */ | |
580 | ||
581 | static void | |
582 | frame_saved_regs_register_unwind (struct frame_info *frame, void **cache, | |
583 | int regnum, int *optimizedp, | |
584 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
585 | int *realnump, void *bufferp) | |
586 | { | |
587 | /* There is always a frame at this point. And THIS is the frame | |
588 | we're interested in. */ | |
589 | gdb_assert (frame != NULL); | |
590 | /* If we're using generic dummy frames, we'd better not be in a call | |
591 | dummy. (generic_call_dummy_register_unwind ought to have been called | |
592 | instead.) */ | |
07555a72 | 593 | gdb_assert (!(DEPRECATED_USE_GENERIC_DUMMY_FRAMES |
5e0f933e | 594 | && (get_frame_type (frame) == DUMMY_FRAME))); |
4c1e7e9d | 595 | |
8f871025 AC |
596 | /* Only (older) architectures that implement the |
597 | FRAME_INIT_SAVED_REGS method should be using this function. */ | |
598 | gdb_assert (FRAME_INIT_SAVED_REGS_P ()); | |
599 | ||
4c1e7e9d | 600 | /* Load the saved_regs register cache. */ |
a94dd1fd | 601 | if (get_frame_saved_regs (frame) == NULL) |
4c1e7e9d AC |
602 | FRAME_INIT_SAVED_REGS (frame); |
603 | ||
a94dd1fd AC |
604 | if (get_frame_saved_regs (frame) != NULL |
605 | && get_frame_saved_regs (frame)[regnum] != 0) | |
4c1e7e9d AC |
606 | { |
607 | if (regnum == SP_REGNUM) | |
608 | { | |
609 | /* SP register treated specially. */ | |
610 | *optimizedp = 0; | |
611 | *lvalp = not_lval; | |
612 | *addrp = 0; | |
613 | *realnump = -1; | |
614 | if (bufferp != NULL) | |
615 | store_address (bufferp, REGISTER_RAW_SIZE (regnum), | |
a94dd1fd | 616 | get_frame_saved_regs (frame)[regnum]); |
4c1e7e9d AC |
617 | } |
618 | else | |
619 | { | |
620 | /* Any other register is saved in memory, fetch it but cache | |
621 | a local copy of its value. */ | |
622 | *optimizedp = 0; | |
623 | *lvalp = lval_memory; | |
a94dd1fd | 624 | *addrp = get_frame_saved_regs (frame)[regnum]; |
4c1e7e9d AC |
625 | *realnump = -1; |
626 | if (bufferp != NULL) | |
627 | { | |
628 | #if 1 | |
629 | /* Save each register value, as it is read in, in a | |
630 | frame based cache. */ | |
631 | void **regs = (*cache); | |
632 | if (regs == NULL) | |
633 | { | |
634 | int sizeof_cache = ((NUM_REGS + NUM_PSEUDO_REGS) | |
635 | * sizeof (void *)); | |
479ab5a0 | 636 | regs = frame_obstack_zalloc (sizeof_cache); |
4c1e7e9d AC |
637 | (*cache) = regs; |
638 | } | |
639 | if (regs[regnum] == NULL) | |
640 | { | |
641 | regs[regnum] | |
479ab5a0 | 642 | = frame_obstack_zalloc (REGISTER_RAW_SIZE (regnum)); |
a94dd1fd | 643 | read_memory (get_frame_saved_regs (frame)[regnum], regs[regnum], |
4c1e7e9d AC |
644 | REGISTER_RAW_SIZE (regnum)); |
645 | } | |
646 | memcpy (bufferp, regs[regnum], REGISTER_RAW_SIZE (regnum)); | |
647 | #else | |
648 | /* Read the value in from memory. */ | |
a94dd1fd | 649 | read_memory (get_frame_saved_regs (frame)[regnum], bufferp, |
4c1e7e9d AC |
650 | REGISTER_RAW_SIZE (regnum)); |
651 | #endif | |
652 | } | |
653 | } | |
654 | return; | |
655 | } | |
656 | ||
657 | /* No luck, assume this and the next frame have the same register | |
a94dd1fd AC |
658 | value. Pass the request down the frame chain to the next frame. |
659 | Hopefully that will find the register's location, either in a | |
660 | register or in memory. */ | |
661 | frame_register (frame, regnum, optimizedp, lvalp, addrp, realnump, | |
662 | bufferp); | |
4c1e7e9d AC |
663 | } |
664 | ||
f18c5a73 AC |
665 | static CORE_ADDR |
666 | frame_saved_regs_pc_unwind (struct frame_info *frame, void **cache) | |
667 | { | |
d62d1979 | 668 | gdb_assert (FRAME_SAVED_PC_P ()); |
f18c5a73 AC |
669 | return FRAME_SAVED_PC (frame); |
670 | } | |
671 | ||
c170fb60 AC |
672 | static void |
673 | frame_saved_regs_id_unwind (struct frame_info *next_frame, void **cache, | |
674 | struct frame_id *id) | |
c689142b AC |
675 | { |
676 | int fromleaf; | |
c170fb60 AC |
677 | CORE_ADDR base; |
678 | CORE_ADDR pc; | |
679 | ||
680 | /* Start out by assuming it's NULL. */ | |
681 | (*id) = null_frame_id; | |
c689142b | 682 | |
a94dd1fd | 683 | if (frame_relative_level (next_frame) <= 0) |
c689142b AC |
684 | /* FIXME: 2002-11-09: Frameless functions can occure anywhere in |
685 | the frame chain, not just the inner most frame! The generic, | |
686 | per-architecture, frame code should handle this and the below | |
687 | should simply be removed. */ | |
688 | fromleaf = FRAMELESS_FUNCTION_INVOCATION (next_frame); | |
689 | else | |
690 | fromleaf = 0; | |
691 | ||
692 | if (fromleaf) | |
693 | /* A frameless inner-most frame. The `FP' (which isn't an | |
694 | architecture frame-pointer register!) of the caller is the same | |
695 | as the callee. */ | |
696 | /* FIXME: 2002-11-09: There isn't any reason to special case this | |
697 | edge condition. Instead the per-architecture code should hande | |
698 | it locally. */ | |
c170fb60 | 699 | base = get_frame_base (next_frame); |
c689142b AC |
700 | else |
701 | { | |
702 | /* Two macros defined in tm.h specify the machine-dependent | |
703 | actions to be performed here. | |
704 | ||
705 | First, get the frame's chain-pointer. | |
706 | ||
707 | If that is zero, the frame is the outermost frame or a leaf | |
708 | called by the outermost frame. This means that if start | |
709 | calls main without a frame, we'll return 0 (which is fine | |
710 | anyway). | |
711 | ||
712 | Nope; there's a problem. This also returns when the current | |
713 | routine is a leaf of main. This is unacceptable. We move | |
714 | this to after the ffi test; I'd rather have backtraces from | |
715 | start go curfluy than have an abort called from main not show | |
716 | main. */ | |
d62d1979 | 717 | gdb_assert (FRAME_CHAIN_P ()); |
c170fb60 | 718 | base = FRAME_CHAIN (next_frame); |
c689142b | 719 | |
c170fb60 AC |
720 | if (!frame_chain_valid (base, next_frame)) |
721 | return; | |
c689142b | 722 | } |
c170fb60 AC |
723 | if (base == 0) |
724 | return; | |
c689142b AC |
725 | |
726 | /* FIXME: cagney/2002-06-08: This should probably return the frame's | |
727 | function and not the PC (a.k.a. resume address). */ | |
c170fb60 AC |
728 | pc = frame_pc_unwind (next_frame); |
729 | id->pc = pc; | |
730 | id->base = base; | |
c689142b AC |
731 | } |
732 | ||
dbe9fe58 AC |
733 | static void |
734 | frame_saved_regs_pop (struct frame_info *fi, void **cache, | |
735 | struct regcache *regcache) | |
736 | { | |
dedc2a2b | 737 | gdb_assert (POP_FRAME_P ()); |
dbe9fe58 AC |
738 | POP_FRAME; |
739 | } | |
740 | ||
494cca16 | 741 | const struct frame_unwind trad_frame_unwinder = { |
dbe9fe58 | 742 | frame_saved_regs_pop, |
494cca16 AC |
743 | frame_saved_regs_pc_unwind, |
744 | frame_saved_regs_id_unwind, | |
745 | frame_saved_regs_register_unwind | |
746 | }; | |
747 | const struct frame_unwind *trad_frame_unwind = &trad_frame_unwinder; | |
748 | ||
749 | ||
4c1e7e9d AC |
750 | /* Function: get_saved_register |
751 | Find register number REGNUM relative to FRAME and put its (raw, | |
752 | target format) contents in *RAW_BUFFER. | |
753 | ||
754 | Set *OPTIMIZED if the variable was optimized out (and thus can't be | |
755 | fetched). Note that this is never set to anything other than zero | |
756 | in this implementation. | |
757 | ||
758 | Set *LVAL to lval_memory, lval_register, or not_lval, depending on | |
759 | whether the value was fetched from memory, from a register, or in a | |
760 | strange and non-modifiable way (e.g. a frame pointer which was | |
761 | calculated rather than fetched). We will use not_lval for values | |
762 | fetched from generic dummy frames. | |
763 | ||
764 | Set *ADDRP to the address, either in memory or as a REGISTER_BYTE | |
765 | offset into the registers array. If the value is stored in a dummy | |
766 | frame, set *ADDRP to zero. | |
767 | ||
768 | To use this implementation, define a function called | |
769 | "get_saved_register" in your target code, which simply passes all | |
770 | of its arguments to this function. | |
771 | ||
772 | The argument RAW_BUFFER must point to aligned memory. */ | |
773 | ||
774 | void | |
775 | deprecated_generic_get_saved_register (char *raw_buffer, int *optimized, | |
776 | CORE_ADDR *addrp, | |
777 | struct frame_info *frame, int regnum, | |
778 | enum lval_type *lval) | |
779 | { | |
780 | if (!target_has_registers) | |
781 | error ("No registers."); | |
782 | ||
8f871025 AC |
783 | gdb_assert (FRAME_INIT_SAVED_REGS_P ()); |
784 | ||
4c1e7e9d AC |
785 | /* Normal systems don't optimize out things with register numbers. */ |
786 | if (optimized != NULL) | |
787 | *optimized = 0; | |
788 | ||
789 | if (addrp) /* default assumption: not found in memory */ | |
790 | *addrp = 0; | |
791 | ||
792 | /* Note: since the current frame's registers could only have been | |
793 | saved by frames INTERIOR TO the current frame, we skip examining | |
794 | the current frame itself: otherwise, we would be getting the | |
795 | previous frame's registers which were saved by the current frame. */ | |
796 | ||
a94dd1fd | 797 | if (frame != NULL) |
4c1e7e9d | 798 | { |
a94dd1fd AC |
799 | for (frame = get_next_frame (frame); |
800 | frame_relative_level (frame) >= 0; | |
801 | frame = get_next_frame (frame)) | |
4c1e7e9d | 802 | { |
a94dd1fd | 803 | if (get_frame_type (frame) == DUMMY_FRAME) |
4c1e7e9d | 804 | { |
a94dd1fd AC |
805 | if (lval) /* found it in a CALL_DUMMY frame */ |
806 | *lval = not_lval; | |
807 | if (raw_buffer) | |
808 | /* FIXME: cagney/2002-06-26: This should be via the | |
809 | gdbarch_register_read() method so that it, on the | |
810 | fly, constructs either a raw or pseudo register | |
811 | from the raw register cache. */ | |
812 | regcache_raw_read | |
813 | (generic_find_dummy_frame (get_frame_pc (frame), | |
814 | get_frame_base (frame)), | |
815 | regnum, raw_buffer); | |
816 | return; | |
4c1e7e9d | 817 | } |
a94dd1fd AC |
818 | |
819 | FRAME_INIT_SAVED_REGS (frame); | |
820 | if (get_frame_saved_regs (frame) != NULL | |
821 | && get_frame_saved_regs (frame)[regnum] != 0) | |
4c1e7e9d | 822 | { |
a94dd1fd AC |
823 | if (lval) /* found it saved on the stack */ |
824 | *lval = lval_memory; | |
825 | if (regnum == SP_REGNUM) | |
826 | { | |
827 | if (raw_buffer) /* SP register treated specially */ | |
828 | store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), | |
829 | get_frame_saved_regs (frame)[regnum]); | |
830 | } | |
831 | else | |
832 | { | |
833 | if (addrp) /* any other register */ | |
834 | *addrp = get_frame_saved_regs (frame)[regnum]; | |
835 | if (raw_buffer) | |
836 | read_memory (get_frame_saved_regs (frame)[regnum], raw_buffer, | |
837 | REGISTER_RAW_SIZE (regnum)); | |
838 | } | |
839 | return; | |
4c1e7e9d | 840 | } |
4c1e7e9d AC |
841 | } |
842 | } | |
843 | ||
844 | /* If we get thru the loop to this point, it means the register was | |
845 | not saved in any frame. Return the actual live-register value. */ | |
846 | ||
847 | if (lval) /* found it in a live register */ | |
848 | *lval = lval_register; | |
849 | if (addrp) | |
850 | *addrp = REGISTER_BYTE (regnum); | |
851 | if (raw_buffer) | |
852 | deprecated_read_register_gen (regnum, raw_buffer); | |
853 | } | |
854 | ||
eb4f72c5 AC |
855 | /* Determine the frame's type based on its PC. */ |
856 | ||
857 | static enum frame_type | |
858 | frame_type_from_pc (CORE_ADDR pc) | |
859 | { | |
860 | /* FIXME: cagney/2002-11-24: Can't yet directly call | |
861 | pc_in_dummy_frame() as some architectures don't set | |
862 | PC_IN_CALL_DUMMY() to generic_pc_in_call_dummy() (remember the | |
863 | latter is implemented by simply calling pc_in_dummy_frame). */ | |
864 | if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES | |
865 | && DEPRECATED_PC_IN_CALL_DUMMY (pc, 0, 0)) | |
866 | return DUMMY_FRAME; | |
867 | else | |
868 | { | |
869 | char *name; | |
870 | find_pc_partial_function (pc, &name, NULL, NULL); | |
871 | if (PC_IN_SIGTRAMP (pc, name)) | |
872 | return SIGTRAMP_FRAME; | |
873 | else | |
874 | return NORMAL_FRAME; | |
875 | } | |
876 | } | |
877 | ||
4c1e7e9d AC |
878 | /* Create an arbitrary (i.e. address specified by user) or innermost frame. |
879 | Always returns a non-NULL value. */ | |
880 | ||
881 | struct frame_info * | |
882 | create_new_frame (CORE_ADDR addr, CORE_ADDR pc) | |
883 | { | |
884 | struct frame_info *fi; | |
4c1e7e9d | 885 | |
479ab5a0 | 886 | fi = frame_obstack_zalloc (sizeof (struct frame_info)); |
4c1e7e9d AC |
887 | |
888 | fi->frame = addr; | |
889 | fi->pc = pc; | |
a94dd1fd | 890 | fi->next = create_sentinel_frame (current_regcache); |
eb4f72c5 | 891 | fi->type = frame_type_from_pc (pc); |
4c1e7e9d AC |
892 | |
893 | if (INIT_EXTRA_FRAME_INFO_P ()) | |
894 | INIT_EXTRA_FRAME_INFO (0, fi); | |
895 | ||
896 | /* Select/initialize an unwind function. */ | |
494cca16 | 897 | fi->unwind = frame_unwind_find_by_pc (current_gdbarch, fi->pc); |
4c1e7e9d AC |
898 | |
899 | return fi; | |
900 | } | |
901 | ||
902 | /* Return the frame that FRAME calls (NULL if FRAME is the innermost | |
a94dd1fd AC |
903 | frame). Be careful to not fall off the bottom of the frame chain |
904 | and onto the sentinel frame. */ | |
4c1e7e9d AC |
905 | |
906 | struct frame_info * | |
907 | get_next_frame (struct frame_info *frame) | |
908 | { | |
a94dd1fd AC |
909 | if (frame->level > 0) |
910 | return frame->next; | |
911 | else | |
912 | return NULL; | |
4c1e7e9d AC |
913 | } |
914 | ||
915 | /* Flush the entire frame cache. */ | |
916 | ||
917 | void | |
918 | flush_cached_frames (void) | |
919 | { | |
920 | /* Since we can't really be sure what the first object allocated was */ | |
921 | obstack_free (&frame_cache_obstack, 0); | |
922 | obstack_init (&frame_cache_obstack); | |
923 | ||
924 | current_frame = NULL; /* Invalidate cache */ | |
925 | select_frame (NULL); | |
926 | annotate_frames_invalid (); | |
927 | } | |
928 | ||
929 | /* Flush the frame cache, and start a new one if necessary. */ | |
930 | ||
931 | void | |
932 | reinit_frame_cache (void) | |
933 | { | |
934 | flush_cached_frames (); | |
935 | ||
936 | /* FIXME: The inferior_ptid test is wrong if there is a corefile. */ | |
937 | if (PIDGET (inferior_ptid) != 0) | |
938 | { | |
939 | select_frame (get_current_frame ()); | |
940 | } | |
941 | } | |
942 | ||
eb4f72c5 AC |
943 | /* Create the previous frame using the deprecated methods |
944 | INIT_EXTRA_INFO, INIT_FRAME_PC and INIT_FRAME_PC_FIRST. */ | |
4c1e7e9d | 945 | |
eb4f72c5 AC |
946 | static struct frame_info * |
947 | legacy_get_prev_frame (struct frame_info *next_frame) | |
4c1e7e9d AC |
948 | { |
949 | CORE_ADDR address = 0; | |
950 | struct frame_info *prev; | |
95adb866 | 951 | int fromleaf; |
4c1e7e9d | 952 | |
eb4f72c5 AC |
953 | /* This code only works on normal frames. A sentinel frame, where |
954 | the level is -1, should never reach this code. */ | |
955 | gdb_assert (next_frame->level >= 0); | |
4c1e7e9d AC |
956 | |
957 | /* On some machines it is possible to call a function without | |
958 | setting up a stack frame for it. On these machines, we | |
959 | define this macro to take two args; a frameinfo pointer | |
960 | identifying a frame and a variable to set or clear if it is | |
961 | or isn't leafless. */ | |
962 | ||
963 | /* Still don't want to worry about this except on the innermost | |
95adb866 AC |
964 | frame. This macro will set FROMLEAF if NEXT_FRAME is a frameless |
965 | function invocation. */ | |
eb4f72c5 | 966 | if (next_frame->level == 0) |
95adb866 AC |
967 | /* FIXME: 2002-11-09: Frameless functions can occure anywhere in |
968 | the frame chain, not just the inner most frame! The generic, | |
969 | per-architecture, frame code should handle this and the below | |
970 | should simply be removed. */ | |
971 | fromleaf = FRAMELESS_FUNCTION_INVOCATION (next_frame); | |
972 | else | |
973 | fromleaf = 0; | |
974 | ||
975 | if (fromleaf) | |
976 | /* A frameless inner-most frame. The `FP' (which isn't an | |
977 | architecture frame-pointer register!) of the caller is the same | |
978 | as the callee. */ | |
979 | /* FIXME: 2002-11-09: There isn't any reason to special case this | |
980 | edge condition. Instead the per-architecture code should hande | |
981 | it locally. */ | |
c193f6ac | 982 | address = get_frame_base (next_frame); |
95adb866 | 983 | else |
4c1e7e9d AC |
984 | { |
985 | /* Two macros defined in tm.h specify the machine-dependent | |
986 | actions to be performed here. | |
95adb866 | 987 | |
4c1e7e9d | 988 | First, get the frame's chain-pointer. |
95adb866 | 989 | |
4c1e7e9d AC |
990 | If that is zero, the frame is the outermost frame or a leaf |
991 | called by the outermost frame. This means that if start | |
992 | calls main without a frame, we'll return 0 (which is fine | |
993 | anyway). | |
994 | ||
995 | Nope; there's a problem. This also returns when the current | |
996 | routine is a leaf of main. This is unacceptable. We move | |
997 | this to after the ffi test; I'd rather have backtraces from | |
998 | start go curfluy than have an abort called from main not show | |
999 | main. */ | |
d62d1979 | 1000 | gdb_assert (FRAME_CHAIN_P ()); |
4c1e7e9d AC |
1001 | address = FRAME_CHAIN (next_frame); |
1002 | ||
51603483 | 1003 | if (!frame_chain_valid (address, next_frame)) |
4c1e7e9d AC |
1004 | return 0; |
1005 | } | |
1006 | if (address == 0) | |
1007 | return 0; | |
1008 | ||
95adb866 | 1009 | /* Create an initially zero previous frame. */ |
479ab5a0 | 1010 | prev = frame_obstack_zalloc (sizeof (struct frame_info)); |
4c1e7e9d | 1011 | |
95adb866 AC |
1012 | /* Link it in. */ |
1013 | next_frame->prev = prev; | |
4c1e7e9d AC |
1014 | prev->next = next_frame; |
1015 | prev->frame = address; | |
1016 | prev->level = next_frame->level + 1; | |
5a203e44 AC |
1017 | /* FIXME: cagney/2002-11-18: Should be setting the frame's type |
1018 | here, before anything else, and not last. Various INIT functions | |
1019 | are full of work-arounds for the frames type not being set | |
1020 | correctly from the word go. Ulgh! */ | |
1021 | prev->type = NORMAL_FRAME; | |
4c1e7e9d | 1022 | |
95adb866 | 1023 | /* This change should not be needed, FIXME! We should determine |
a5afb99f AC |
1024 | whether any targets *need* DEPRECATED_INIT_FRAME_PC to happen |
1025 | after INIT_EXTRA_FRAME_INFO and come up with a simple way to | |
1026 | express what goes on here. | |
95adb866 AC |
1027 | |
1028 | INIT_EXTRA_FRAME_INFO is called from two places: create_new_frame | |
1029 | (where the PC is already set up) and here (where it isn't). | |
a5afb99f | 1030 | DEPRECATED_INIT_FRAME_PC is only called from here, always after |
95adb866 AC |
1031 | INIT_EXTRA_FRAME_INFO. |
1032 | ||
1033 | The catch is the MIPS, where INIT_EXTRA_FRAME_INFO requires the | |
1034 | PC value (which hasn't been set yet). Some other machines appear | |
1035 | to require INIT_EXTRA_FRAME_INFO before they can do | |
a5afb99f | 1036 | DEPRECATED_INIT_FRAME_PC. Phoo. |
95adb866 | 1037 | |
2ca6c561 AC |
1038 | We shouldn't need DEPRECATED_INIT_FRAME_PC_FIRST to add more |
1039 | complication to an already overcomplicated part of GDB. | |
1040 | gnu@cygnus.com, 15Sep92. | |
95adb866 | 1041 | |
a5afb99f | 1042 | Assuming that some machines need DEPRECATED_INIT_FRAME_PC after |
95adb866 AC |
1043 | INIT_EXTRA_FRAME_INFO, one possible scheme: |
1044 | ||
1045 | SETUP_INNERMOST_FRAME(): Default version is just create_new_frame | |
1046 | (read_fp ()), read_pc ()). Machines with extra frame info would | |
1047 | do that (or the local equivalent) and then set the extra fields. | |
1048 | ||
1049 | SETUP_ARBITRARY_FRAME(argc, argv): Only change here is that | |
1050 | create_new_frame would no longer init extra frame info; | |
1051 | SETUP_ARBITRARY_FRAME would have to do that. | |
1052 | ||
1053 | INIT_PREV_FRAME(fromleaf, prev) Replace INIT_EXTRA_FRAME_INFO and | |
a5afb99f AC |
1054 | DEPRECATED_INIT_FRAME_PC. This should also return a flag saying |
1055 | whether to keep the new frame, or whether to discard it, because | |
1056 | on some machines (e.g. mips) it is really awkward to have | |
95adb866 AC |
1057 | FRAME_CHAIN_VALID called *before* INIT_EXTRA_FRAME_INFO (there is |
1058 | no good way to get information deduced in FRAME_CHAIN_VALID into | |
1059 | the extra fields of the new frame). std_frame_pc(fromleaf, prev) | |
1060 | ||
1061 | This is the default setting for INIT_PREV_FRAME. It just does | |
a5afb99f AC |
1062 | what the default DEPRECATED_INIT_FRAME_PC does. Some machines |
1063 | will call it from INIT_PREV_FRAME (either at the beginning, the | |
1064 | end, or in the middle). Some machines won't use it. | |
95adb866 AC |
1065 | |
1066 | kingdon@cygnus.com, 13Apr93, 31Jan94, 14Dec94. */ | |
1067 | ||
1068 | /* NOTE: cagney/2002-11-09: Just ignore the above! There is no | |
1069 | reason for things to be this complicated. | |
1070 | ||
1071 | The trick is to assume that there is always a frame. Instead of | |
1072 | special casing the inner-most frame, create fake frame | |
1073 | (containing the hardware registers) that is inner to the | |
1074 | user-visible inner-most frame (...) and then unwind from that. | |
1075 | That way architecture code can use use the standard | |
1076 | frame_XX_unwind() functions and not differentiate between the | |
1077 | inner most and any other case. | |
1078 | ||
1079 | Since there is always a frame to unwind from, there is always | |
1080 | somewhere (NEXT_FRAME) to store all the info needed to construct | |
1081 | a new (previous) frame without having to first create it. This | |
1082 | means that the convolution below - needing to carefully order a | |
1083 | frame's initialization - isn't needed. | |
1084 | ||
1085 | The irony here though, is that FRAME_CHAIN(), at least for a more | |
1086 | up-to-date architecture, always calls FRAME_SAVED_PC(), and | |
1087 | FRAME_SAVED_PC() computes the PC but without first needing the | |
1088 | frame! Instead of the convolution below, we could have simply | |
1089 | called FRAME_SAVED_PC() and been done with it! Note that | |
1090 | FRAME_SAVED_PC() is being superseed by frame_pc_unwind() and that | |
1091 | function does have somewhere to cache that PC value. */ | |
4c1e7e9d | 1092 | |
2ca6c561 | 1093 | if (DEPRECATED_INIT_FRAME_PC_FIRST_P ()) |
97f46953 | 1094 | prev->pc = (DEPRECATED_INIT_FRAME_PC_FIRST (fromleaf, prev)); |
4c1e7e9d AC |
1095 | |
1096 | if (INIT_EXTRA_FRAME_INFO_P ()) | |
1097 | INIT_EXTRA_FRAME_INFO (fromleaf, prev); | |
1098 | ||
1099 | /* This entry is in the frame queue now, which is good since | |
95adb866 AC |
1100 | FRAME_SAVED_PC may use that queue to figure out its value (see |
1101 | tm-sparc.h). We want the pc saved in the inferior frame. */ | |
a5afb99f AC |
1102 | if (DEPRECATED_INIT_FRAME_PC_P ()) |
1103 | prev->pc = DEPRECATED_INIT_FRAME_PC (fromleaf, prev); | |
4c1e7e9d | 1104 | |
95adb866 AC |
1105 | /* If ->frame and ->pc are unchanged, we are in the process of |
1106 | getting ourselves into an infinite backtrace. Some architectures | |
1107 | check this in FRAME_CHAIN or thereabouts, but it seems like there | |
1108 | is no reason this can't be an architecture-independent check. */ | |
1109 | if (prev->frame == next_frame->frame | |
1110 | && prev->pc == next_frame->pc) | |
4c1e7e9d | 1111 | { |
95adb866 AC |
1112 | next_frame->prev = NULL; |
1113 | obstack_free (&frame_cache_obstack, prev); | |
1114 | return NULL; | |
4c1e7e9d AC |
1115 | } |
1116 | ||
1117 | /* Initialize the code used to unwind the frame PREV based on the PC | |
1118 | (and probably other architectural information). The PC lets you | |
1119 | check things like the debug info at that point (dwarf2cfi?) and | |
1120 | use that to decide how the frame should be unwound. */ | |
494cca16 | 1121 | prev->unwind = frame_unwind_find_by_pc (current_gdbarch, prev->pc); |
4c1e7e9d | 1122 | |
5a203e44 AC |
1123 | /* NOTE: cagney/2002-11-18: The code segments, found in |
1124 | create_new_frame and get_prev_frame(), that initializes the | |
1125 | frames type is subtly different. The latter only updates ->type | |
1126 | when it encounters a SIGTRAMP_FRAME or DUMMY_FRAME. This stops | |
1127 | get_prev_frame() overriding the frame's type when the INIT code | |
1128 | has previously set it. This is really somewhat bogus. The | |
1129 | initialization, as seen in create_new_frame(), should occur | |
1130 | before the INIT function has been called. */ | |
07555a72 | 1131 | if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES |
ae45cd16 AC |
1132 | && (DEPRECATED_PC_IN_CALL_DUMMY_P () |
1133 | ? DEPRECATED_PC_IN_CALL_DUMMY (prev->pc, 0, 0) | |
1134 | : pc_in_dummy_frame (prev->pc))) | |
5a203e44 AC |
1135 | prev->type = DUMMY_FRAME; |
1136 | else | |
1137 | { | |
1138 | /* FIXME: cagney/2002-11-10: This should be moved to before the | |
1139 | INIT code above so that the INIT code knows what the frame's | |
1140 | type is (in fact, for a [generic] dummy-frame, the type can | |
1141 | be set and then the entire initialization can be skipped. | |
1142 | Unforunatly, its the INIT code that sets the PC (Hmm, catch | |
1143 | 22). */ | |
1144 | char *name; | |
1145 | find_pc_partial_function (prev->pc, &name, NULL, NULL); | |
1146 | if (PC_IN_SIGTRAMP (prev->pc, name)) | |
1147 | prev->type = SIGTRAMP_FRAME; | |
1148 | /* FIXME: cagney/2002-11-11: Leave prev->type alone. Some | |
1149 | architectures are forcing the frame's type in INIT so we | |
1150 | don't want to override it here. Remember, NORMAL_FRAME == 0, | |
1151 | so it all works (just :-/). Once this initialization is | |
1152 | moved to the start of this function, all this nastness will | |
1153 | go away. */ | |
1154 | } | |
4c1e7e9d AC |
1155 | |
1156 | return prev; | |
1157 | } | |
1158 | ||
eb4f72c5 AC |
1159 | /* Return a structure containing various interesting information |
1160 | about the frame that called NEXT_FRAME. Returns NULL | |
1161 | if there is no such frame. */ | |
1162 | ||
1163 | struct frame_info * | |
1164 | get_prev_frame (struct frame_info *next_frame) | |
1165 | { | |
1166 | struct frame_info *prev_frame; | |
1167 | ||
1168 | /* Return the inner-most frame, when the caller passes in NULL. */ | |
1169 | /* NOTE: cagney/2002-11-09: Not sure how this would happen. The | |
1170 | caller should have previously obtained a valid frame using | |
1171 | get_selected_frame() and then called this code - only possibility | |
1172 | I can think of is code behaving badly. | |
1173 | ||
1174 | NOTE: cagney/2003-01-10: Talk about code behaving badly. Check | |
1175 | block_innermost_frame(). It does the sequence: frame = NULL; | |
1176 | while (1) { frame = get_prev_frame (frame); .... }. Ulgh! Why | |
1177 | it couldn't be written better, I don't know. | |
1178 | ||
1179 | NOTE: cagney/2003-01-11: I suspect what is happening is | |
1180 | block_innermost_frame() is, when the target has no state | |
1181 | (registers, memory, ...), still calling this function. The | |
1182 | assumption being that this function will return NULL indicating | |
1183 | that a frame isn't possible, rather than checking that the target | |
1184 | has state and then calling get_current_frame() and | |
1185 | get_prev_frame(). This is a guess mind. */ | |
1186 | if (next_frame == NULL) | |
1187 | { | |
1188 | /* NOTE: cagney/2002-11-09: There was a code segment here that | |
1189 | would error out when CURRENT_FRAME was NULL. The comment | |
1190 | that went with it made the claim ... | |
1191 | ||
1192 | ``This screws value_of_variable, which just wants a nice | |
1193 | clean NULL return from block_innermost_frame if there are no | |
1194 | frames. I don't think I've ever seen this message happen | |
1195 | otherwise. And returning NULL here is a perfectly legitimate | |
1196 | thing to do.'' | |
1197 | ||
1198 | Per the above, this code shouldn't even be called with a NULL | |
1199 | NEXT_FRAME. */ | |
1200 | return current_frame; | |
1201 | } | |
1202 | ||
1203 | /* There is always a frame. If this assertion fails, suspect that | |
1204 | something should be calling get_selected_frame() or | |
1205 | get_current_frame(). */ | |
1206 | gdb_assert (next_frame != NULL); | |
1207 | ||
1208 | if (next_frame->level >= 0 | |
1209 | && !backtrace_below_main | |
1210 | && inside_main_func (get_frame_pc (next_frame))) | |
1211 | /* Don't unwind past main(), bug always unwind the sentinel frame. | |
1212 | Note, this is done _before_ the frame has been marked as | |
1213 | previously unwound. That way if the user later decides to | |
1214 | allow unwinds past main(), that just happens. */ | |
1215 | return NULL; | |
1216 | ||
1217 | /* Only try to do the unwind once. */ | |
1218 | if (next_frame->prev_p) | |
1219 | return next_frame->prev; | |
1220 | next_frame->prev_p = 1; | |
1221 | ||
1222 | /* If we're inside the entry file, it isn't valid. */ | |
1223 | /* NOTE: drow/2002-12-25: should there be a way to disable this | |
1224 | check? It assumes a single small entry file, and the way some | |
1225 | debug readers (e.g. dbxread) figure out which object is the | |
1226 | entry file is somewhat hokey. */ | |
1227 | /* NOTE: cagney/2003-01-10: If there is a way of disabling this test | |
1228 | then it should probably be moved to before the ->prev_p test, | |
1229 | above. */ | |
1230 | if (inside_entry_file (get_frame_pc (next_frame))) | |
1231 | return NULL; | |
1232 | ||
1233 | /* If any of the old frame initialization methods are around, use | |
1234 | the legacy get_prev_frame method. Just don't try to unwind a | |
1235 | sentinel frame using that method - it doesn't work. All sentinal | |
1236 | frames use the new unwind code. */ | |
1237 | if ((DEPRECATED_INIT_FRAME_PC_P () | |
1238 | || DEPRECATED_INIT_FRAME_PC_FIRST_P () | |
d62d1979 AC |
1239 | || INIT_EXTRA_FRAME_INFO_P () |
1240 | || FRAME_CHAIN_P ()) | |
eb4f72c5 AC |
1241 | && next_frame->level >= 0) |
1242 | return legacy_get_prev_frame (next_frame); | |
1243 | ||
1244 | /* Allocate the new frame but do not wire it in to the frame chain. | |
1245 | Some (bad) code in INIT_FRAME_EXTRA_INFO tries to look along | |
1246 | frame->next to pull some fancy tricks (of course such code is, by | |
1247 | definition, recursive). Try to prevent it. | |
1248 | ||
1249 | There is no reason to worry about memory leaks, should the | |
1250 | remainder of the function fail. The allocated memory will be | |
1251 | quickly reclaimed when the frame cache is flushed, and the `we've | |
1252 | been here before' check above will stop repeated memory | |
1253 | allocation calls. */ | |
1254 | prev_frame = FRAME_OBSTACK_ZALLOC (struct frame_info); | |
1255 | prev_frame->level = next_frame->level + 1; | |
1256 | ||
1257 | /* Try to unwind the PC. If that doesn't work, assume we've reached | |
1258 | the oldest frame and simply return. Is there a better sentinal | |
1259 | value? The unwound PC value is then used to initialize the new | |
1260 | previous frame's type. | |
1261 | ||
1262 | Note that the pc-unwind is intentionally performed before the | |
1263 | frame chain. This is ok since, for old targets, both | |
1264 | frame_pc_unwind (nee, FRAME_SAVED_PC) and FRAME_CHAIN()) assume | |
1265 | NEXT_FRAME's data structures have already been initialized (using | |
1266 | INIT_EXTRA_FRAME_INFO) and hence the call order doesn't matter. | |
1267 | ||
1268 | By unwinding the PC first, it becomes possible to, in the case of | |
1269 | a dummy frame, avoid also unwinding the frame ID. This is | |
1270 | because (well ignoring the PPC) a dummy frame can be located | |
1271 | using NEXT_FRAME's frame ID. */ | |
1272 | ||
1273 | prev_frame->pc = frame_pc_unwind (next_frame); | |
1274 | if (prev_frame->pc == 0) | |
1275 | /* The allocated PREV_FRAME will be reclaimed when the frame | |
1276 | obstack is next purged. */ | |
1277 | return NULL; | |
1278 | prev_frame->type = frame_type_from_pc (prev_frame->pc); | |
1279 | ||
1280 | /* Set the unwind functions based on that identified PC. */ | |
1281 | prev_frame->unwind = frame_unwind_find_by_pc (current_gdbarch, | |
1282 | prev_frame->pc); | |
1283 | ||
1284 | /* FIXME: cagney/2003-01-13: A dummy frame doesn't need to unwind | |
1285 | the frame ID because the frame ID comes from the previous frame. | |
1286 | The other frames do though. True? */ | |
1287 | { | |
1288 | /* FIXME: cagney/2002-12-18: Instead of this hack, should just | |
1289 | save the frame ID directly. */ | |
1290 | struct frame_id id = frame_id_unwind (next_frame); | |
1291 | if (!frame_id_p (id)) | |
1292 | return NULL; | |
1293 | prev_frame->frame = id.base; | |
1294 | } | |
1295 | ||
1296 | /* Link it in. */ | |
1297 | next_frame->prev = prev_frame; | |
1298 | prev_frame->next = next_frame; | |
1299 | ||
1300 | /* FIXME: cagney/2002-01-19: This call will go away. Instead of | |
1301 | initializing extra info, all frames will use the frame_cache | |
1302 | (passed to the unwind functions) to store additional frame info. | |
1303 | Unfortunatly legacy targets can't use legacy_get_prev_frame() to | |
1304 | unwind the sentinel frame and, consequently, are forced to take | |
1305 | this code path and rely on the below call to INIT_EXTR_FRAME_INFO | |
1306 | to initialize the inner-most frame. */ | |
1307 | if (INIT_EXTRA_FRAME_INFO_P ()) | |
1308 | { | |
1309 | gdb_assert (prev_frame->level == 0); | |
1310 | INIT_EXTRA_FRAME_INFO (0, prev_frame); | |
1311 | } | |
1312 | ||
1313 | return prev_frame; | |
1314 | } | |
1315 | ||
4c1e7e9d AC |
1316 | CORE_ADDR |
1317 | get_frame_pc (struct frame_info *frame) | |
1318 | { | |
1319 | return frame->pc; | |
1320 | } | |
1321 | ||
1058bca7 AC |
1322 | static int |
1323 | pc_notcurrent (struct frame_info *frame) | |
1324 | { | |
1325 | /* If FRAME is not the innermost frame, that normally means that | |
1326 | FRAME->pc points at the return instruction (which is *after* the | |
1327 | call instruction), and we want to get the line containing the | |
1328 | call (because the call is where the user thinks the program is). | |
1329 | However, if the next frame is either a SIGTRAMP_FRAME or a | |
1330 | DUMMY_FRAME, then the next frame will contain a saved interrupt | |
1331 | PC and such a PC indicates the current (rather than next) | |
1332 | instruction/line, consequently, for such cases, want to get the | |
1333 | line containing fi->pc. */ | |
1334 | struct frame_info *next = get_next_frame (frame); | |
1335 | int notcurrent = (next != NULL && get_frame_type (next) == NORMAL_FRAME); | |
1336 | return notcurrent; | |
1337 | } | |
1338 | ||
1339 | void | |
1340 | find_frame_sal (struct frame_info *frame, struct symtab_and_line *sal) | |
1341 | { | |
1342 | (*sal) = find_pc_line (frame->pc, pc_notcurrent (frame)); | |
1343 | } | |
1344 | ||
c193f6ac AC |
1345 | /* Per "frame.h", return the ``address'' of the frame. Code should |
1346 | really be using get_frame_id(). */ | |
1347 | CORE_ADDR | |
1348 | get_frame_base (struct frame_info *fi) | |
1349 | { | |
1350 | return fi->frame; | |
1351 | } | |
1352 | ||
85cf597a AC |
1353 | /* Level of the selected frame: 0 for innermost, 1 for its caller, ... |
1354 | or -1 for a NULL frame. */ | |
1355 | ||
1356 | int | |
1357 | frame_relative_level (struct frame_info *fi) | |
1358 | { | |
1359 | if (fi == NULL) | |
1360 | return -1; | |
1361 | else | |
1362 | return fi->level; | |
1363 | } | |
1364 | ||
5a203e44 AC |
1365 | enum frame_type |
1366 | get_frame_type (struct frame_info *frame) | |
1367 | { | |
1368 | /* Some targets still don't use [generic] dummy frames. Catch them | |
1369 | here. */ | |
07555a72 | 1370 | if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES |
5a203e44 AC |
1371 | && deprecated_frame_in_dummy (frame)) |
1372 | return DUMMY_FRAME; | |
1373 | return frame->type; | |
1374 | } | |
1375 | ||
1376 | void | |
1377 | deprecated_set_frame_type (struct frame_info *frame, enum frame_type type) | |
1378 | { | |
1379 | /* Arrrg! See comment in "frame.h". */ | |
1380 | frame->type = type; | |
1381 | } | |
1382 | ||
4c1e7e9d AC |
1383 | #ifdef FRAME_FIND_SAVED_REGS |
1384 | /* XXX - deprecated. This is a compatibility function for targets | |
1385 | that do not yet implement FRAME_INIT_SAVED_REGS. */ | |
1386 | /* Find the addresses in which registers are saved in FRAME. */ | |
1387 | ||
1388 | void | |
95486978 AC |
1389 | deprecated_get_frame_saved_regs (struct frame_info *frame, |
1390 | struct frame_saved_regs *saved_regs_addr) | |
4c1e7e9d AC |
1391 | { |
1392 | if (frame->saved_regs == NULL) | |
1393 | { | |
1394 | frame->saved_regs = (CORE_ADDR *) | |
479ab5a0 | 1395 | frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS); |
4c1e7e9d AC |
1396 | } |
1397 | if (saved_regs_addr == NULL) | |
1398 | { | |
1399 | struct frame_saved_regs saved_regs; | |
1400 | FRAME_FIND_SAVED_REGS (frame, saved_regs); | |
1401 | memcpy (frame->saved_regs, &saved_regs, SIZEOF_FRAME_SAVED_REGS); | |
1402 | } | |
1403 | else | |
1404 | { | |
1405 | FRAME_FIND_SAVED_REGS (frame, *saved_regs_addr); | |
1406 | memcpy (frame->saved_regs, saved_regs_addr, SIZEOF_FRAME_SAVED_REGS); | |
1407 | } | |
1408 | } | |
1409 | #endif | |
1410 | ||
0394eb2a AC |
1411 | struct frame_extra_info * |
1412 | get_frame_extra_info (struct frame_info *fi) | |
1413 | { | |
1414 | return fi->extra_info; | |
1415 | } | |
1416 | ||
2c517d0e AC |
1417 | struct frame_extra_info * |
1418 | frame_extra_info_zalloc (struct frame_info *fi, long size) | |
1419 | { | |
479ab5a0 | 1420 | fi->extra_info = frame_obstack_zalloc (size); |
2c517d0e AC |
1421 | return fi->extra_info; |
1422 | } | |
1423 | ||
b87efeee | 1424 | void |
2f107107 | 1425 | deprecated_update_frame_pc_hack (struct frame_info *frame, CORE_ADDR pc) |
b87efeee | 1426 | { |
2f107107 | 1427 | /* See comment in "frame.h". */ |
a94dd1fd | 1428 | gdb_assert (frame->next != NULL); |
2f107107 AC |
1429 | frame->pc = pc; |
1430 | } | |
1431 | ||
1432 | void | |
1433 | deprecated_update_frame_base_hack (struct frame_info *frame, CORE_ADDR base) | |
1434 | { | |
1435 | /* See comment in "frame.h". */ | |
1436 | frame->frame = base; | |
b87efeee AC |
1437 | } |
1438 | ||
c8b8a898 AC |
1439 | void |
1440 | deprecated_set_frame_saved_regs_hack (struct frame_info *frame, | |
1441 | CORE_ADDR *saved_regs) | |
1442 | { | |
1443 | frame->saved_regs = saved_regs; | |
1444 | } | |
1445 | ||
1446 | void | |
1447 | deprecated_set_frame_extra_info_hack (struct frame_info *frame, | |
1448 | struct frame_extra_info *extra_info) | |
1449 | { | |
1450 | frame->extra_info = extra_info; | |
1451 | } | |
1452 | ||
483d36b2 AC |
1453 | void |
1454 | deprecated_set_frame_next_hack (struct frame_info *fi, | |
1455 | struct frame_info *next) | |
1456 | { | |
1457 | fi->next = next; | |
1458 | } | |
1459 | ||
1460 | void | |
1461 | deprecated_set_frame_prev_hack (struct frame_info *fi, | |
1462 | struct frame_info *prev) | |
1463 | { | |
1464 | fi->prev = prev; | |
1465 | } | |
1466 | ||
2d75187b AC |
1467 | struct context * |
1468 | deprecated_get_frame_context (struct frame_info *fi) | |
1469 | { | |
1470 | return fi->context; | |
1471 | } | |
1472 | ||
1473 | void | |
1474 | deprecated_set_frame_context (struct frame_info *fi, | |
1475 | struct context *context) | |
1476 | { | |
1477 | fi->context = context; | |
1478 | } | |
1479 | ||
c8b8a898 AC |
1480 | struct frame_info * |
1481 | deprecated_frame_xmalloc (void) | |
1482 | { | |
1483 | struct frame_info *frame = XMALLOC (struct frame_info); | |
1484 | memset (frame, 0, sizeof (struct frame_info)); | |
1485 | return frame; | |
1486 | } | |
1487 | ||
f6c609c4 AC |
1488 | struct frame_info * |
1489 | deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs, | |
1490 | long sizeof_extra_info) | |
1491 | { | |
1492 | struct frame_info *frame = deprecated_frame_xmalloc (); | |
1493 | make_cleanup (xfree, frame); | |
1494 | if (sizeof_saved_regs > 0) | |
1495 | { | |
1496 | frame->saved_regs = xcalloc (1, sizeof_saved_regs); | |
1497 | make_cleanup (xfree, frame->saved_regs); | |
1498 | } | |
1499 | if (sizeof_extra_info > 0) | |
1500 | { | |
1501 | frame->extra_info = xcalloc (1, sizeof_extra_info); | |
1502 | make_cleanup (xfree, frame->extra_info); | |
1503 | } | |
1504 | return frame; | |
1505 | } | |
c8b8a898 | 1506 | |
4c1e7e9d AC |
1507 | void |
1508 | _initialize_frame (void) | |
1509 | { | |
1510 | obstack_init (&frame_cache_obstack); | |
eb4f72c5 AC |
1511 | |
1512 | /* FIXME: cagney/2003-01-19: This command needs a rename. Suggest | |
1513 | `set backtrace {past,beyond,...}-main'. Also suggest adding `set | |
1514 | backtrace ...-start' to control backtraces past start. The | |
1515 | problem with `below' is that it stops the `up' command. */ | |
1516 | ||
1517 | add_setshow_boolean_cmd ("backtrace-below-main", class_obscure, | |
1518 | &backtrace_below_main, "\ | |
1519 | Set whether backtraces should continue past \"main\".\n\ | |
1520 | Normally the caller of \"main\" is not of interest, so GDB will terminate\n\ | |
1521 | the backtrace at \"main\". Set this variable if you need to see the rest\n\ | |
1522 | of the stack trace.", "\ | |
1523 | Show whether backtraces should continue past \"main\".\n\ | |
1524 | Normally the caller of \"main\" is not of interest, so GDB will terminate\n\ | |
1525 | the backtrace at \"main\". Set this variable if you need to see the rest\n\ | |
1526 | of the stack trace.", | |
1527 | NULL, NULL, &setlist, &showlist); | |
4c1e7e9d | 1528 | } |