Commit | Line | Data |
---|---|---|
7cc19214 AC |
1 | /* Get info from stack frames; convert between frames, blocks, |
2 | functions and pc values. | |
3 | ||
4 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, | |
26b0da32 MK |
5 | 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
6 | Free Software Foundation, Inc. | |
c906108c | 7 | |
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "symtab.h" | |
27 | #include "bfd.h" | |
28 | #include "symfile.h" | |
29 | #include "objfiles.h" | |
30 | #include "frame.h" | |
31 | #include "gdbcore.h" | |
32 | #include "value.h" /* for read_register */ | |
33 | #include "target.h" /* for target_has_stack */ | |
34 | #include "inferior.h" /* for read_pc */ | |
35 | #include "annotate.h" | |
4e052eda | 36 | #include "regcache.h" |
4f460812 | 37 | #include "gdb_assert.h" |
9c1412c1 | 38 | #include "dummy-frame.h" |
51603483 DJ |
39 | #include "command.h" |
40 | #include "gdbcmd.h" | |
fe898f56 | 41 | #include "block.h" |
c906108c | 42 | |
51603483 | 43 | /* Prototypes for exported functions. */ |
c5aa993b | 44 | |
51603483 | 45 | void _initialize_blockframe (void); |
c906108c | 46 | |
618ce49f AC |
47 | /* Is ADDR inside the startup file? Note that if your machine has a |
48 | way to detect the bottom of the stack, there is no need to call | |
49 | this function from DEPRECATED_FRAME_CHAIN_VALID; the reason for | |
50 | doing so is that some machines have no way of detecting bottom of | |
51 | stack. | |
c906108c SS |
52 | |
53 | A PC of zero is always considered to be the bottom of the stack. */ | |
54 | ||
55 | int | |
627b3ba2 | 56 | deprecated_inside_entry_file (CORE_ADDR addr) |
c906108c SS |
57 | { |
58 | if (addr == 0) | |
59 | return 1; | |
60 | if (symfile_objfile == 0) | |
61 | return 0; | |
9710e734 AC |
62 | if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT |
63 | || CALL_DUMMY_LOCATION == AT_SYMBOL) | |
7a292a7a SS |
64 | { |
65 | /* Do not stop backtracing if the pc is in the call dummy | |
c5aa993b | 66 | at the entry point. */ |
7a292a7a | 67 | /* FIXME: Won't always work with zeros for the last two arguments */ |
ae45cd16 | 68 | if (DEPRECATED_PC_IN_CALL_DUMMY (addr, 0, 0)) |
7a292a7a SS |
69 | return 0; |
70 | } | |
627b3ba2 AC |
71 | return (addr >= symfile_objfile->ei.deprecated_entry_file_lowpc && |
72 | addr < symfile_objfile->ei.deprecated_entry_file_highpc); | |
c906108c SS |
73 | } |
74 | ||
f614e9d9 | 75 | /* Test whether PC is in the range of addresses that corresponds to |
c6831537 | 76 | the "main" function. */ |
c906108c SS |
77 | |
78 | int | |
fba45db2 | 79 | inside_main_func (CORE_ADDR pc) |
c906108c | 80 | { |
8d4ce20a JB |
81 | struct minimal_symbol *msymbol; |
82 | ||
c906108c SS |
83 | if (symfile_objfile == 0) |
84 | return 0; | |
85 | ||
8d4ce20a JB |
86 | msymbol = lookup_minimal_symbol (main_name (), NULL, symfile_objfile); |
87 | ||
f614e9d9 MK |
88 | /* If the address range hasn't been set up at symbol reading time, |
89 | set it up now. */ | |
c906108c | 90 | |
8d4ce20a JB |
91 | if (msymbol != NULL |
92 | && symfile_objfile->ei.main_func_lowpc == INVALID_ENTRY_LOWPC | |
93 | && symfile_objfile->ei.main_func_highpc == INVALID_ENTRY_HIGHPC) | |
c906108c | 94 | { |
f614e9d9 MK |
95 | /* brobecker/2003-10-10: We used to rely on lookup_symbol() to |
96 | search the symbol associated to the "main" function. | |
97 | Unfortunately, lookup_symbol() uses the current-language | |
98 | la_lookup_symbol_nonlocal function to do the global symbol | |
99 | search. Depending on the language, this can introduce | |
100 | certain side-effects, because certain languages, for instance | |
101 | Ada, may find more than one match. Therefore we prefer to | |
102 | search the "main" function symbol using its address rather | |
103 | than its name. */ | |
104 | struct symbol *mainsym = | |
105 | find_pc_function (SYMBOL_VALUE_ADDRESS (msymbol)); | |
c906108c | 106 | |
c5aa993b JM |
107 | if (mainsym && SYMBOL_CLASS (mainsym) == LOC_BLOCK) |
108 | { | |
109 | symfile_objfile->ei.main_func_lowpc = | |
c906108c | 110 | BLOCK_START (SYMBOL_BLOCK_VALUE (mainsym)); |
c5aa993b | 111 | symfile_objfile->ei.main_func_highpc = |
c906108c | 112 | BLOCK_END (SYMBOL_BLOCK_VALUE (mainsym)); |
c5aa993b | 113 | } |
c906108c | 114 | } |
0714963c AC |
115 | |
116 | /* Not in the normal symbol tables, see if "main" is in the partial | |
117 | symbol table. If it's not, then give up. */ | |
f614e9d9 MK |
118 | if (msymbol != NULL && MSYMBOL_TYPE (msymbol) == mst_text) |
119 | { | |
120 | CORE_ADDR maddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
121 | asection *msect = SYMBOL_BFD_SECTION (msymbol); | |
122 | struct obj_section *osect = find_pc_sect_section (maddr, msect); | |
123 | ||
124 | if (osect != NULL) | |
125 | { | |
126 | int i; | |
127 | ||
128 | /* Step over other symbols at this same address, and symbols | |
129 | in other sections, to find the next symbol in this | |
130 | section with a different address. */ | |
131 | for (i = 1; SYMBOL_LINKAGE_NAME (msymbol + i) != NULL; i++) | |
132 | { | |
133 | if (SYMBOL_VALUE_ADDRESS (msymbol + i) != maddr | |
134 | && SYMBOL_BFD_SECTION (msymbol + i) == msect) | |
135 | break; | |
136 | } | |
137 | ||
138 | symfile_objfile->ei.main_func_lowpc = maddr; | |
139 | ||
140 | /* Use the lesser of the next minimal symbol in the same | |
141 | section, or the end of the section, as the end of the | |
142 | function. */ | |
143 | if (SYMBOL_LINKAGE_NAME (msymbol + i) != NULL | |
144 | && SYMBOL_VALUE_ADDRESS (msymbol + i) < osect->endaddr) | |
145 | symfile_objfile->ei.main_func_highpc = | |
146 | SYMBOL_VALUE_ADDRESS (msymbol + i); | |
147 | else | |
148 | /* We got the start address from the last msymbol in the | |
149 | objfile. So the end address is the end of the | |
150 | section. */ | |
151 | symfile_objfile->ei.main_func_highpc = osect->endaddr; | |
152 | } | |
153 | } | |
154 | ||
155 | return (symfile_objfile->ei.main_func_lowpc <= pc | |
156 | && symfile_objfile->ei.main_func_highpc > pc); | |
c906108c SS |
157 | } |
158 | ||
6e4c6c91 | 159 | /* Test whether THIS_FRAME is inside the process entry point function. */ |
c906108c SS |
160 | |
161 | int | |
6e4c6c91 DJ |
162 | inside_entry_func (struct frame_info *this_frame) |
163 | { | |
164 | return (get_frame_func (this_frame) == entry_point_address ()); | |
165 | } | |
166 | ||
167 | /* Similar to inside_entry_func, but accomodating legacy frame code. */ | |
168 | ||
169 | static int | |
170 | legacy_inside_entry_func (CORE_ADDR pc) | |
c906108c | 171 | { |
c906108c SS |
172 | if (symfile_objfile == 0) |
173 | return 0; | |
29ff87c5 | 174 | |
7a292a7a SS |
175 | if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT) |
176 | { | |
29ff87c5 MK |
177 | /* Do not stop backtracing if the program counter is in the call |
178 | dummy at the entry point. */ | |
179 | /* FIXME: This won't always work with zeros for the last two | |
180 | arguments. */ | |
ae45cd16 | 181 | if (DEPRECATED_PC_IN_CALL_DUMMY (pc, 0, 0)) |
7a292a7a SS |
182 | return 0; |
183 | } | |
29ff87c5 MK |
184 | |
185 | return (symfile_objfile->ei.entry_func_lowpc <= pc | |
186 | && symfile_objfile->ei.entry_func_highpc > pc); | |
c906108c SS |
187 | } |
188 | ||
c906108c SS |
189 | /* Return nonzero if the function for this frame lacks a prologue. Many |
190 | machines can define FRAMELESS_FUNCTION_INVOCATION to just call this | |
191 | function. */ | |
192 | ||
193 | int | |
fba45db2 | 194 | frameless_look_for_prologue (struct frame_info *frame) |
c906108c | 195 | { |
e76c5fcc | 196 | CORE_ADDR func_start; |
53a5351d | 197 | |
be41e9f4 | 198 | func_start = get_frame_func (frame); |
c906108c SS |
199 | if (func_start) |
200 | { | |
201 | func_start += FUNCTION_START_OFFSET; | |
31687c3c AC |
202 | /* NOTE: cagney/2004-02-09: Eliminated per-architecture |
203 | PROLOGUE_FRAMELESS_P call as architectures with custom | |
204 | implementations had all been deleted. Eventually even this | |
205 | function can go - GDB no longer tries to differentiate | |
206 | between framed, frameless and stackless functions. They are | |
207 | all now considered equally evil :-^. */ | |
208 | /* If skipping the prologue ends up skips nothing, there must be | |
209 | no prologue and hence no code creating a frame. There for | |
210 | the function is "frameless" :-/. */ | |
211 | return func_start == SKIP_PROLOGUE (func_start); | |
c906108c | 212 | } |
bdd78e62 | 213 | else if (get_frame_pc (frame) == 0) |
53a5351d JM |
214 | /* A frame with a zero PC is usually created by dereferencing a |
215 | NULL function pointer, normally causing an immediate core dump | |
216 | of the inferior. Mark function as frameless, as the inferior | |
217 | has no chance of setting up a stack frame. */ | |
c906108c SS |
218 | return 1; |
219 | else | |
220 | /* If we can't find the start of the function, we don't really | |
221 | know whether the function is frameless, but we should be able | |
222 | to get a reasonable (i.e. best we can do under the | |
223 | circumstances) backtrace by saying that it isn't. */ | |
224 | return 0; | |
225 | } | |
226 | ||
c906108c | 227 | /* Return the innermost lexical block in execution |
ae767bfb JB |
228 | in a specified stack frame. The frame address is assumed valid. |
229 | ||
230 | If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the exact code | |
231 | address we used to choose the block. We use this to find a source | |
232 | line, to decide which macro definitions are in scope. | |
233 | ||
234 | The value returned in *ADDR_IN_BLOCK isn't necessarily the frame's | |
235 | PC, and may not really be a valid PC at all. For example, in the | |
236 | caller of a function declared to never return, the code at the | |
237 | return address will never be reached, so the call instruction may | |
238 | be the very last instruction in the block. So the address we use | |
239 | to choose the block is actually one byte before the return address | |
240 | --- hopefully pointing us at the call instruction, or its delay | |
241 | slot instruction. */ | |
c906108c SS |
242 | |
243 | struct block * | |
ae767bfb | 244 | get_frame_block (struct frame_info *frame, CORE_ADDR *addr_in_block) |
c906108c | 245 | { |
c4a09524 | 246 | const CORE_ADDR pc = get_frame_address_in_block (frame); |
ae767bfb JB |
247 | |
248 | if (addr_in_block) | |
249 | *addr_in_block = pc; | |
250 | ||
c906108c SS |
251 | return block_for_pc (pc); |
252 | } | |
253 | ||
c906108c | 254 | CORE_ADDR |
fba45db2 | 255 | get_pc_function_start (CORE_ADDR pc) |
c906108c | 256 | { |
2cdd89cb MK |
257 | struct block *bl; |
258 | struct minimal_symbol *msymbol; | |
c906108c | 259 | |
2cdd89cb MK |
260 | bl = block_for_pc (pc); |
261 | if (bl) | |
c906108c | 262 | { |
2cdd89cb MK |
263 | struct symbol *symbol = block_function (bl); |
264 | ||
265 | if (symbol) | |
266 | { | |
267 | bl = SYMBOL_BLOCK_VALUE (symbol); | |
268 | return BLOCK_START (bl); | |
269 | } | |
c906108c | 270 | } |
2cdd89cb MK |
271 | |
272 | msymbol = lookup_minimal_symbol_by_pc (pc); | |
273 | if (msymbol) | |
c906108c | 274 | { |
2cdd89cb MK |
275 | CORE_ADDR fstart = SYMBOL_VALUE_ADDRESS (msymbol); |
276 | ||
277 | if (find_pc_section (fstart)) | |
278 | return fstart; | |
c906108c | 279 | } |
2cdd89cb MK |
280 | |
281 | return 0; | |
c906108c SS |
282 | } |
283 | ||
284 | /* Return the symbol for the function executing in frame FRAME. */ | |
285 | ||
286 | struct symbol * | |
fba45db2 | 287 | get_frame_function (struct frame_info *frame) |
c906108c | 288 | { |
52f0bd74 | 289 | struct block *bl = get_frame_block (frame, 0); |
c906108c SS |
290 | if (bl == 0) |
291 | return 0; | |
292 | return block_function (bl); | |
293 | } | |
294 | \f | |
295 | ||
c906108c SS |
296 | /* Return the function containing pc value PC in section SECTION. |
297 | Returns 0 if function is not known. */ | |
298 | ||
299 | struct symbol * | |
198beae2 | 300 | find_pc_sect_function (CORE_ADDR pc, struct bfd_section *section) |
c906108c | 301 | { |
52f0bd74 | 302 | struct block *b = block_for_pc_sect (pc, section); |
c906108c SS |
303 | if (b == 0) |
304 | return 0; | |
305 | return block_function (b); | |
306 | } | |
307 | ||
308 | /* Return the function containing pc value PC. | |
309 | Returns 0 if function is not known. Backward compatibility, no section */ | |
310 | ||
311 | struct symbol * | |
fba45db2 | 312 | find_pc_function (CORE_ADDR pc) |
c906108c SS |
313 | { |
314 | return find_pc_sect_function (pc, find_pc_mapped_section (pc)); | |
315 | } | |
316 | ||
317 | /* These variables are used to cache the most recent result | |
318 | * of find_pc_partial_function. */ | |
319 | ||
c5aa993b JM |
320 | static CORE_ADDR cache_pc_function_low = 0; |
321 | static CORE_ADDR cache_pc_function_high = 0; | |
322 | static char *cache_pc_function_name = 0; | |
198beae2 | 323 | static struct bfd_section *cache_pc_function_section = NULL; |
c906108c SS |
324 | |
325 | /* Clear cache, e.g. when symbol table is discarded. */ | |
326 | ||
327 | void | |
fba45db2 | 328 | clear_pc_function_cache (void) |
c906108c SS |
329 | { |
330 | cache_pc_function_low = 0; | |
331 | cache_pc_function_high = 0; | |
c5aa993b | 332 | cache_pc_function_name = (char *) 0; |
c906108c SS |
333 | cache_pc_function_section = NULL; |
334 | } | |
335 | ||
336 | /* Finds the "function" (text symbol) that is smaller than PC but | |
337 | greatest of all of the potential text symbols in SECTION. Sets | |
338 | *NAME and/or *ADDRESS conditionally if that pointer is non-null. | |
339 | If ENDADDR is non-null, then set *ENDADDR to be the end of the | |
340 | function (exclusive), but passing ENDADDR as non-null means that | |
341 | the function might cause symbols to be read. This function either | |
342 | succeeds or fails (not halfway succeeds). If it succeeds, it sets | |
343 | *NAME, *ADDRESS, and *ENDADDR to real information and returns 1. | |
344 | If it fails, it sets *NAME, *ADDRESS, and *ENDADDR to zero and | |
345 | returns 0. */ | |
346 | ||
347 | int | |
fba45db2 KB |
348 | find_pc_sect_partial_function (CORE_ADDR pc, asection *section, char **name, |
349 | CORE_ADDR *address, CORE_ADDR *endaddr) | |
c906108c SS |
350 | { |
351 | struct partial_symtab *pst; | |
c5aa993b | 352 | struct symbol *f; |
c906108c SS |
353 | struct minimal_symbol *msymbol; |
354 | struct partial_symbol *psb; | |
c5aa993b | 355 | struct obj_section *osect; |
c906108c SS |
356 | int i; |
357 | CORE_ADDR mapped_pc; | |
358 | ||
359 | mapped_pc = overlay_mapped_address (pc, section); | |
360 | ||
247055de MK |
361 | if (mapped_pc >= cache_pc_function_low |
362 | && mapped_pc < cache_pc_function_high | |
363 | && section == cache_pc_function_section) | |
c906108c SS |
364 | goto return_cached_value; |
365 | ||
366 | /* If sigtramp is in the u area, it counts as a function (especially | |
367 | important for step_1). */ | |
43156d82 | 368 | if (SIGTRAMP_START_P () && PC_IN_SIGTRAMP (mapped_pc, (char *) NULL)) |
c906108c | 369 | { |
c5aa993b JM |
370 | cache_pc_function_low = SIGTRAMP_START (mapped_pc); |
371 | cache_pc_function_high = SIGTRAMP_END (mapped_pc); | |
372 | cache_pc_function_name = "<sigtramp>"; | |
c906108c SS |
373 | cache_pc_function_section = section; |
374 | goto return_cached_value; | |
375 | } | |
c906108c SS |
376 | |
377 | msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section); | |
378 | pst = find_pc_sect_psymtab (mapped_pc, section); | |
379 | if (pst) | |
380 | { | |
381 | /* Need to read the symbols to get a good value for the end address. */ | |
382 | if (endaddr != NULL && !pst->readin) | |
383 | { | |
384 | /* Need to get the terminal in case symbol-reading produces | |
385 | output. */ | |
386 | target_terminal_ours_for_output (); | |
387 | PSYMTAB_TO_SYMTAB (pst); | |
388 | } | |
389 | ||
390 | if (pst->readin) | |
391 | { | |
392 | /* Checking whether the msymbol has a larger value is for the | |
393 | "pathological" case mentioned in print_frame_info. */ | |
394 | f = find_pc_sect_function (mapped_pc, section); | |
395 | if (f != NULL | |
396 | && (msymbol == NULL | |
397 | || (BLOCK_START (SYMBOL_BLOCK_VALUE (f)) | |
398 | >= SYMBOL_VALUE_ADDRESS (msymbol)))) | |
399 | { | |
c5aa993b JM |
400 | cache_pc_function_low = BLOCK_START (SYMBOL_BLOCK_VALUE (f)); |
401 | cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f)); | |
22abf04a | 402 | cache_pc_function_name = DEPRECATED_SYMBOL_NAME (f); |
c906108c SS |
403 | cache_pc_function_section = section; |
404 | goto return_cached_value; | |
405 | } | |
406 | } | |
407 | else | |
408 | { | |
409 | /* Now that static symbols go in the minimal symbol table, perhaps | |
410 | we could just ignore the partial symbols. But at least for now | |
411 | we use the partial or minimal symbol, whichever is larger. */ | |
412 | psb = find_pc_sect_psymbol (pst, mapped_pc, section); | |
413 | ||
414 | if (psb | |
415 | && (msymbol == NULL || | |
416 | (SYMBOL_VALUE_ADDRESS (psb) | |
417 | >= SYMBOL_VALUE_ADDRESS (msymbol)))) | |
418 | { | |
419 | /* This case isn't being cached currently. */ | |
420 | if (address) | |
421 | *address = SYMBOL_VALUE_ADDRESS (psb); | |
422 | if (name) | |
22abf04a | 423 | *name = DEPRECATED_SYMBOL_NAME (psb); |
c906108c SS |
424 | /* endaddr non-NULL can't happen here. */ |
425 | return 1; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | /* Not in the normal symbol tables, see if the pc is in a known section. | |
431 | If it's not, then give up. This ensures that anything beyond the end | |
432 | of the text seg doesn't appear to be part of the last function in the | |
433 | text segment. */ | |
434 | ||
435 | osect = find_pc_sect_section (mapped_pc, section); | |
436 | ||
437 | if (!osect) | |
438 | msymbol = NULL; | |
439 | ||
440 | /* Must be in the minimal symbol table. */ | |
441 | if (msymbol == NULL) | |
442 | { | |
443 | /* No available symbol. */ | |
444 | if (name != NULL) | |
445 | *name = 0; | |
446 | if (address != NULL) | |
447 | *address = 0; | |
448 | if (endaddr != NULL) | |
449 | *endaddr = 0; | |
450 | return 0; | |
451 | } | |
452 | ||
c5aa993b | 453 | cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol); |
22abf04a | 454 | cache_pc_function_name = DEPRECATED_SYMBOL_NAME (msymbol); |
c906108c SS |
455 | cache_pc_function_section = section; |
456 | ||
457 | /* Use the lesser of the next minimal symbol in the same section, or | |
458 | the end of the section, as the end of the function. */ | |
c5aa993b | 459 | |
c906108c SS |
460 | /* Step over other symbols at this same address, and symbols in |
461 | other sections, to find the next symbol in this section with | |
462 | a different address. */ | |
463 | ||
22abf04a | 464 | for (i = 1; DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL; i++) |
c906108c | 465 | { |
c5aa993b | 466 | if (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol) |
247055de | 467 | && SYMBOL_BFD_SECTION (msymbol + i) == SYMBOL_BFD_SECTION (msymbol)) |
c906108c SS |
468 | break; |
469 | } | |
470 | ||
22abf04a | 471 | if (DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL |
c906108c SS |
472 | && SYMBOL_VALUE_ADDRESS (msymbol + i) < osect->endaddr) |
473 | cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i); | |
474 | else | |
475 | /* We got the start address from the last msymbol in the objfile. | |
476 | So the end address is the end of the section. */ | |
477 | cache_pc_function_high = osect->endaddr; | |
478 | ||
247055de | 479 | return_cached_value: |
c906108c SS |
480 | |
481 | if (address) | |
482 | { | |
483 | if (pc_in_unmapped_range (pc, section)) | |
c5aa993b | 484 | *address = overlay_unmapped_address (cache_pc_function_low, section); |
c906108c | 485 | else |
c5aa993b | 486 | *address = cache_pc_function_low; |
c906108c | 487 | } |
c5aa993b | 488 | |
c906108c SS |
489 | if (name) |
490 | *name = cache_pc_function_name; | |
491 | ||
492 | if (endaddr) | |
493 | { | |
494 | if (pc_in_unmapped_range (pc, section)) | |
c5aa993b | 495 | { |
c906108c SS |
496 | /* Because the high address is actually beyond the end of |
497 | the function (and therefore possibly beyond the end of | |
247055de MK |
498 | the overlay), we must actually convert (high - 1) and |
499 | then add one to that. */ | |
c906108c | 500 | |
c5aa993b | 501 | *endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1, |
c906108c | 502 | section); |
c5aa993b | 503 | } |
c906108c | 504 | else |
c5aa993b | 505 | *endaddr = cache_pc_function_high; |
c906108c SS |
506 | } |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
247055de | 511 | /* Backward compatibility, no section argument. */ |
c906108c SS |
512 | |
513 | int | |
fba45db2 KB |
514 | find_pc_partial_function (CORE_ADDR pc, char **name, CORE_ADDR *address, |
515 | CORE_ADDR *endaddr) | |
c906108c | 516 | { |
43b54b88 AC |
517 | struct bfd_section *bfd_section; |
518 | ||
519 | /* To ensure that the symbol returned belongs to the correct setion | |
520 | (and that the last [random] symbol from the previous section | |
521 | isn't returned) try to find the section containing PC. First try | |
522 | the overlay code (which by default returns NULL); and second try | |
523 | the normal section code (which almost always succeeds). */ | |
524 | bfd_section = find_pc_overlay (pc); | |
525 | if (bfd_section == NULL) | |
526 | { | |
527 | struct obj_section *obj_section = find_pc_section (pc); | |
528 | if (obj_section == NULL) | |
529 | bfd_section = NULL; | |
530 | else | |
531 | bfd_section = obj_section->the_bfd_section; | |
532 | } | |
533 | return find_pc_sect_partial_function (pc, bfd_section, name, address, | |
534 | endaddr); | |
c906108c SS |
535 | } |
536 | ||
537 | /* Return the innermost stack frame executing inside of BLOCK, | |
538 | or NULL if there is no such frame. If BLOCK is NULL, just return NULL. */ | |
539 | ||
540 | struct frame_info * | |
fba45db2 | 541 | block_innermost_frame (struct block *block) |
c906108c SS |
542 | { |
543 | struct frame_info *frame; | |
52f0bd74 AC |
544 | CORE_ADDR start; |
545 | CORE_ADDR end; | |
42f99ac2 | 546 | CORE_ADDR calling_pc; |
c906108c SS |
547 | |
548 | if (block == NULL) | |
549 | return NULL; | |
550 | ||
551 | start = BLOCK_START (block); | |
552 | end = BLOCK_END (block); | |
553 | ||
554 | frame = NULL; | |
555 | while (1) | |
556 | { | |
557 | frame = get_prev_frame (frame); | |
558 | if (frame == NULL) | |
559 | return NULL; | |
c4a09524 | 560 | calling_pc = get_frame_address_in_block (frame); |
42f99ac2 | 561 | if (calling_pc >= start && calling_pc < end) |
c906108c SS |
562 | return frame; |
563 | } | |
564 | } | |
565 | ||
7a292a7a SS |
566 | /* Are we in a call dummy? The code below which allows DECR_PC_AFTER_BREAK |
567 | below is for infrun.c, which may give the macro a pc without that | |
568 | subtracted out. */ | |
569 | ||
7a292a7a SS |
570 | /* Is the PC in a call dummy? SP and FRAME_ADDRESS are the bottom and |
571 | top of the stack frame which we are checking, where "bottom" and | |
572 | "top" refer to some section of memory which contains the code for | |
573 | the call dummy. Calls to this macro assume that the contents of | |
0ba6dca9 AC |
574 | SP_REGNUM and DEPRECATED_FP_REGNUM (or the saved values thereof), |
575 | respectively, are the things to pass. | |
576 | ||
577 | This won't work on the 29k, where SP_REGNUM and | |
578 | DEPRECATED_FP_REGNUM don't have that meaning, but the 29k doesn't | |
579 | use ON_STACK. This could be fixed by generalizing this scheme, | |
580 | perhaps by passing in a frame and adding a few fields, at least on | |
581 | machines which need them for DEPRECATED_PC_IN_CALL_DUMMY. | |
7a292a7a SS |
582 | |
583 | Something simpler, like checking for the stack segment, doesn't work, | |
584 | since various programs (threads implementations, gcc nested function | |
585 | stubs, etc) may either allocate stack frames in another segment, or | |
586 | allocate other kinds of code on the stack. */ | |
587 | ||
588 | int | |
b4b88177 AC |
589 | deprecated_pc_in_call_dummy_on_stack (CORE_ADDR pc, CORE_ADDR sp, |
590 | CORE_ADDR frame_address) | |
7a292a7a SS |
591 | { |
592 | return (INNER_THAN ((sp), (pc)) | |
593 | && (frame_address != 0) | |
594 | && INNER_THAN ((pc), (frame_address))); | |
595 | } | |
596 | ||
597 | int | |
b4b88177 AC |
598 | deprecated_pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp, |
599 | CORE_ADDR frame_address) | |
7a292a7a | 600 | { |
88a82a65 AC |
601 | CORE_ADDR addr = entry_point_address (); |
602 | if (DEPRECATED_CALL_DUMMY_ADDRESS_P ()) | |
603 | addr = DEPRECATED_CALL_DUMMY_ADDRESS (); | |
604 | return ((pc) >= addr && (pc) <= (addr + DECR_PC_AFTER_BREAK)); | |
7a292a7a SS |
605 | } |
606 | ||
e6ba3bc9 AC |
607 | /* Returns true for a user frame or a call_function_by_hand dummy |
608 | frame, and false for the CRT0 start-up frame. Purpose is to | |
609 | terminate backtrace. */ | |
c5aa993b | 610 | |
c906108c | 611 | int |
e6ba3bc9 | 612 | legacy_frame_chain_valid (CORE_ADDR fp, struct frame_info *fi) |
c906108c | 613 | { |
51603483 DJ |
614 | /* Don't prune CALL_DUMMY frames. */ |
615 | if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES | |
616 | && DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), 0, 0)) | |
617 | return 1; | |
618 | ||
619 | /* If the new frame pointer is zero, then it isn't valid. */ | |
620 | if (fp == 0) | |
621 | return 0; | |
622 | ||
623 | /* If the new frame would be inside (younger than) the previous frame, | |
624 | then it isn't valid. */ | |
625 | if (INNER_THAN (fp, get_frame_base (fi))) | |
626 | return 0; | |
627 | ||
7c86889b CV |
628 | /* If the architecture has a custom DEPRECATED_FRAME_CHAIN_VALID, |
629 | call it now. */ | |
630 | if (DEPRECATED_FRAME_CHAIN_VALID_P ()) | |
631 | return DEPRECATED_FRAME_CHAIN_VALID (fp, fi); | |
632 | ||
51603483 DJ |
633 | /* If we're already inside the entry function for the main objfile, then it |
634 | isn't valid. */ | |
6e4c6c91 | 635 | if (legacy_inside_entry_func (get_frame_pc (fi))) |
51603483 DJ |
636 | return 0; |
637 | ||
638 | /* If we're inside the entry file, it isn't valid. */ | |
639 | /* NOTE/drow 2002-12-25: should there be a way to disable this check? It | |
640 | assumes a single small entry file, and the way some debug readers (e.g. | |
641 | dbxread) figure out which object is the entry file is somewhat hokey. */ | |
627b3ba2 | 642 | if (deprecated_inside_entry_file (frame_pc_unwind (fi))) |
51603483 DJ |
643 | return 0; |
644 | ||
51603483 | 645 | return 1; |
c906108c | 646 | } |