Commit | Line | Data |
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b1acf338 | 1 | /* Target-dependent code for HP-UX on PA-RISC. |
ef6e7e13 | 2 | |
b1acf338 | 3 | Copyright 2002, 2003, 2004 Free Software Foundation, Inc. |
273f8429 | 4 | |
b1acf338 | 5 | This file is part of GDB. |
273f8429 | 6 | |
b1acf338 MK |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
273f8429 | 11 | |
b1acf338 MK |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
273f8429 | 16 | |
b1acf338 MK |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
273f8429 JB |
21 | |
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
60e1ff27 | 24 | #include "gdbcore.h" |
273f8429 | 25 | #include "osabi.h" |
222e5d1d | 26 | #include "frame.h" |
43613416 RC |
27 | #include "frame-unwind.h" |
28 | #include "trad-frame.h" | |
4c02c60c AC |
29 | #include "symtab.h" |
30 | #include "objfiles.h" | |
31 | #include "inferior.h" | |
32 | #include "infcall.h" | |
90f943f1 | 33 | #include "observer.h" |
acf86d54 RC |
34 | #include "hppa-tdep.h" |
35 | #include "solib-som.h" | |
36 | #include "solib-pa64.h" | |
08d53055 MK |
37 | #include "regset.h" |
38 | ||
39 | #include "gdb_string.h" | |
4c02c60c AC |
40 | |
41 | #include <dl.h> | |
42 | #include <machine/save_state.h> | |
273f8429 | 43 | |
43613416 RC |
44 | #ifndef offsetof |
45 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
46 | #endif | |
47 | ||
77d18ded RC |
48 | #define IS_32BIT_TARGET(_gdbarch) \ |
49 | ((gdbarch_tdep (_gdbarch))->bytes_per_address == 4) | |
50 | ||
273f8429 JB |
51 | /* Forward declarations. */ |
52 | extern void _initialize_hppa_hpux_tdep (void); | |
53 | extern initialize_file_ftype _initialize_hppa_hpux_tdep; | |
54 | ||
4c02c60c AC |
55 | typedef struct |
56 | { | |
57 | struct minimal_symbol *msym; | |
58 | CORE_ADDR solib_handle; | |
59 | CORE_ADDR return_val; | |
60 | } | |
61 | args_for_find_stub; | |
62 | ||
77d18ded RC |
63 | static int |
64 | in_opd_section (CORE_ADDR pc) | |
65 | { | |
66 | struct obj_section *s; | |
67 | int retval = 0; | |
68 | ||
69 | s = find_pc_section (pc); | |
70 | ||
71 | retval = (s != NULL | |
72 | && s->the_bfd_section->name != NULL | |
73 | && strcmp (s->the_bfd_section->name, ".opd") == 0); | |
74 | return (retval); | |
75 | } | |
76 | ||
abc485a1 RC |
77 | /* Return one if PC is in the call path of a trampoline, else return zero. |
78 | ||
79 | Note we return one for *any* call trampoline (long-call, arg-reloc), not | |
80 | just shared library trampolines (import, export). */ | |
81 | ||
82 | static int | |
83 | hppa32_hpux_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
84 | { | |
85 | struct minimal_symbol *minsym; | |
86 | struct unwind_table_entry *u; | |
abc485a1 RC |
87 | |
88 | /* First see if PC is in one of the two C-library trampolines. */ | |
3388d7ff RC |
89 | if (pc == hppa_symbol_address("$$dyncall") |
90 | || pc == hppa_symbol_address("_sr4export")) | |
abc485a1 RC |
91 | return 1; |
92 | ||
93 | minsym = lookup_minimal_symbol_by_pc (pc); | |
94 | if (minsym && strcmp (DEPRECATED_SYMBOL_NAME (minsym), ".stub") == 0) | |
95 | return 1; | |
96 | ||
97 | /* Get the unwind descriptor corresponding to PC, return zero | |
98 | if no unwind was found. */ | |
99 | u = find_unwind_entry (pc); | |
100 | if (!u) | |
101 | return 0; | |
102 | ||
103 | /* If this isn't a linker stub, then return now. */ | |
104 | if (u->stub_unwind.stub_type == 0) | |
105 | return 0; | |
106 | ||
107 | /* By definition a long-branch stub is a call stub. */ | |
108 | if (u->stub_unwind.stub_type == LONG_BRANCH) | |
109 | return 1; | |
110 | ||
111 | /* The call and return path execute the same instructions within | |
112 | an IMPORT stub! So an IMPORT stub is both a call and return | |
113 | trampoline. */ | |
114 | if (u->stub_unwind.stub_type == IMPORT) | |
115 | return 1; | |
116 | ||
117 | /* Parameter relocation stubs always have a call path and may have a | |
118 | return path. */ | |
119 | if (u->stub_unwind.stub_type == PARAMETER_RELOCATION | |
120 | || u->stub_unwind.stub_type == EXPORT) | |
121 | { | |
122 | CORE_ADDR addr; | |
123 | ||
124 | /* Search forward from the current PC until we hit a branch | |
125 | or the end of the stub. */ | |
126 | for (addr = pc; addr <= u->region_end; addr += 4) | |
127 | { | |
128 | unsigned long insn; | |
129 | ||
130 | insn = read_memory_integer (addr, 4); | |
131 | ||
132 | /* Does it look like a bl? If so then it's the call path, if | |
133 | we find a bv or be first, then we're on the return path. */ | |
134 | if ((insn & 0xfc00e000) == 0xe8000000) | |
135 | return 1; | |
136 | else if ((insn & 0xfc00e001) == 0xe800c000 | |
137 | || (insn & 0xfc000000) == 0xe0000000) | |
138 | return 0; | |
139 | } | |
140 | ||
141 | /* Should never happen. */ | |
142 | warning ("Unable to find branch in parameter relocation stub.\n"); | |
143 | return 0; | |
144 | } | |
145 | ||
146 | /* Unknown stub type. For now, just return zero. */ | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static int | |
151 | hppa64_hpux_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
152 | { | |
153 | /* PA64 has a completely different stub/trampoline scheme. Is it | |
154 | better? Maybe. It's certainly harder to determine with any | |
155 | certainty that we are in a stub because we can not refer to the | |
156 | unwinders to help. | |
157 | ||
158 | The heuristic is simple. Try to lookup the current PC value in th | |
159 | minimal symbol table. If that fails, then assume we are not in a | |
160 | stub and return. | |
161 | ||
162 | Then see if the PC value falls within the section bounds for the | |
163 | section containing the minimal symbol we found in the first | |
164 | step. If it does, then assume we are not in a stub and return. | |
165 | ||
166 | Finally peek at the instructions to see if they look like a stub. */ | |
167 | struct minimal_symbol *minsym; | |
168 | asection *sec; | |
169 | CORE_ADDR addr; | |
170 | int insn, i; | |
171 | ||
172 | minsym = lookup_minimal_symbol_by_pc (pc); | |
173 | if (! minsym) | |
174 | return 0; | |
175 | ||
176 | sec = SYMBOL_BFD_SECTION (minsym); | |
177 | ||
178 | if (bfd_get_section_vma (sec->owner, sec) <= pc | |
179 | && pc < (bfd_get_section_vma (sec->owner, sec) | |
180 | + bfd_section_size (sec->owner, sec))) | |
181 | return 0; | |
182 | ||
183 | /* We might be in a stub. Peek at the instructions. Stubs are 3 | |
184 | instructions long. */ | |
185 | insn = read_memory_integer (pc, 4); | |
186 | ||
187 | /* Find out where we think we are within the stub. */ | |
188 | if ((insn & 0xffffc00e) == 0x53610000) | |
189 | addr = pc; | |
190 | else if ((insn & 0xffffffff) == 0xe820d000) | |
191 | addr = pc - 4; | |
192 | else if ((insn & 0xffffc00e) == 0x537b0000) | |
193 | addr = pc - 8; | |
194 | else | |
195 | return 0; | |
196 | ||
197 | /* Now verify each insn in the range looks like a stub instruction. */ | |
198 | insn = read_memory_integer (addr, 4); | |
199 | if ((insn & 0xffffc00e) != 0x53610000) | |
200 | return 0; | |
201 | ||
202 | /* Now verify each insn in the range looks like a stub instruction. */ | |
203 | insn = read_memory_integer (addr + 4, 4); | |
204 | if ((insn & 0xffffffff) != 0xe820d000) | |
205 | return 0; | |
206 | ||
207 | /* Now verify each insn in the range looks like a stub instruction. */ | |
208 | insn = read_memory_integer (addr + 8, 4); | |
209 | if ((insn & 0xffffc00e) != 0x537b0000) | |
210 | return 0; | |
211 | ||
212 | /* Looks like a stub. */ | |
213 | return 1; | |
214 | } | |
215 | ||
216 | /* Return one if PC is in the return path of a trampoline, else return zero. | |
217 | ||
218 | Note we return one for *any* call trampoline (long-call, arg-reloc), not | |
219 | just shared library trampolines (import, export). */ | |
220 | ||
221 | static int | |
222 | hppa_hpux_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
223 | { | |
224 | struct unwind_table_entry *u; | |
225 | ||
226 | /* Get the unwind descriptor corresponding to PC, return zero | |
227 | if no unwind was found. */ | |
228 | u = find_unwind_entry (pc); | |
229 | if (!u) | |
230 | return 0; | |
231 | ||
232 | /* If this isn't a linker stub or it's just a long branch stub, then | |
233 | return zero. */ | |
234 | if (u->stub_unwind.stub_type == 0 || u->stub_unwind.stub_type == LONG_BRANCH) | |
235 | return 0; | |
236 | ||
237 | /* The call and return path execute the same instructions within | |
238 | an IMPORT stub! So an IMPORT stub is both a call and return | |
239 | trampoline. */ | |
240 | if (u->stub_unwind.stub_type == IMPORT) | |
241 | return 1; | |
242 | ||
243 | /* Parameter relocation stubs always have a call path and may have a | |
244 | return path. */ | |
245 | if (u->stub_unwind.stub_type == PARAMETER_RELOCATION | |
246 | || u->stub_unwind.stub_type == EXPORT) | |
247 | { | |
248 | CORE_ADDR addr; | |
249 | ||
250 | /* Search forward from the current PC until we hit a branch | |
251 | or the end of the stub. */ | |
252 | for (addr = pc; addr <= u->region_end; addr += 4) | |
253 | { | |
254 | unsigned long insn; | |
255 | ||
256 | insn = read_memory_integer (addr, 4); | |
257 | ||
258 | /* Does it look like a bl? If so then it's the call path, if | |
259 | we find a bv or be first, then we're on the return path. */ | |
260 | if ((insn & 0xfc00e000) == 0xe8000000) | |
261 | return 0; | |
262 | else if ((insn & 0xfc00e001) == 0xe800c000 | |
263 | || (insn & 0xfc000000) == 0xe0000000) | |
264 | return 1; | |
265 | } | |
266 | ||
267 | /* Should never happen. */ | |
268 | warning ("Unable to find branch in parameter relocation stub.\n"); | |
269 | return 0; | |
270 | } | |
271 | ||
272 | /* Unknown stub type. For now, just return zero. */ | |
273 | return 0; | |
274 | ||
275 | } | |
276 | ||
277 | /* Figure out if PC is in a trampoline, and if so find out where | |
278 | the trampoline will jump to. If not in a trampoline, return zero. | |
279 | ||
280 | Simple code examination probably is not a good idea since the code | |
281 | sequences in trampolines can also appear in user code. | |
282 | ||
283 | We use unwinds and information from the minimal symbol table to | |
284 | determine when we're in a trampoline. This won't work for ELF | |
285 | (yet) since it doesn't create stub unwind entries. Whether or | |
286 | not ELF will create stub unwinds or normal unwinds for linker | |
287 | stubs is still being debated. | |
288 | ||
289 | This should handle simple calls through dyncall or sr4export, | |
290 | long calls, argument relocation stubs, and dyncall/sr4export | |
291 | calling an argument relocation stub. It even handles some stubs | |
292 | used in dynamic executables. */ | |
293 | ||
294 | static CORE_ADDR | |
295 | hppa_hpux_skip_trampoline_code (CORE_ADDR pc) | |
296 | { | |
297 | long orig_pc = pc; | |
298 | long prev_inst, curr_inst, loc; | |
abc485a1 RC |
299 | struct minimal_symbol *msym; |
300 | struct unwind_table_entry *u; | |
301 | ||
abc485a1 RC |
302 | /* Addresses passed to dyncall may *NOT* be the actual address |
303 | of the function. So we may have to do something special. */ | |
3388d7ff | 304 | if (pc == hppa_symbol_address("$$dyncall")) |
abc485a1 RC |
305 | { |
306 | pc = (CORE_ADDR) read_register (22); | |
307 | ||
308 | /* If bit 30 (counting from the left) is on, then pc is the address of | |
309 | the PLT entry for this function, not the address of the function | |
310 | itself. Bit 31 has meaning too, but only for MPE. */ | |
311 | if (pc & 0x2) | |
312 | pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8); | |
313 | } | |
3388d7ff | 314 | if (pc == hppa_symbol_address("$$dyncall_external")) |
abc485a1 RC |
315 | { |
316 | pc = (CORE_ADDR) read_register (22); | |
317 | pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8); | |
318 | } | |
3388d7ff | 319 | else if (pc == hppa_symbol_address("_sr4export")) |
abc485a1 RC |
320 | pc = (CORE_ADDR) (read_register (22)); |
321 | ||
322 | /* Get the unwind descriptor corresponding to PC, return zero | |
323 | if no unwind was found. */ | |
324 | u = find_unwind_entry (pc); | |
325 | if (!u) | |
326 | return 0; | |
327 | ||
328 | /* If this isn't a linker stub, then return now. */ | |
329 | /* elz: attention here! (FIXME) because of a compiler/linker | |
330 | error, some stubs which should have a non zero stub_unwind.stub_type | |
331 | have unfortunately a value of zero. So this function would return here | |
332 | as if we were not in a trampoline. To fix this, we go look at the partial | |
333 | symbol information, which reports this guy as a stub. | |
334 | (FIXME): Unfortunately, we are not that lucky: it turns out that the | |
335 | partial symbol information is also wrong sometimes. This is because | |
336 | when it is entered (somread.c::som_symtab_read()) it can happen that | |
337 | if the type of the symbol (from the som) is Entry, and the symbol is | |
338 | in a shared library, then it can also be a trampoline. This would | |
339 | be OK, except that I believe the way they decide if we are ina shared library | |
340 | does not work. SOOOO..., even if we have a regular function w/o trampolines | |
341 | its minimal symbol can be assigned type mst_solib_trampoline. | |
342 | Also, if we find that the symbol is a real stub, then we fix the unwind | |
343 | descriptor, and define the stub type to be EXPORT. | |
344 | Hopefully this is correct most of the times. */ | |
345 | if (u->stub_unwind.stub_type == 0) | |
346 | { | |
347 | ||
348 | /* elz: NOTE (FIXME!) once the problem with the unwind information is fixed | |
349 | we can delete all the code which appears between the lines */ | |
350 | /*--------------------------------------------------------------------------*/ | |
351 | msym = lookup_minimal_symbol_by_pc (pc); | |
352 | ||
353 | if (msym == NULL || MSYMBOL_TYPE (msym) != mst_solib_trampoline) | |
354 | return orig_pc == pc ? 0 : pc & ~0x3; | |
355 | ||
356 | else if (msym != NULL && MSYMBOL_TYPE (msym) == mst_solib_trampoline) | |
357 | { | |
358 | struct objfile *objfile; | |
359 | struct minimal_symbol *msymbol; | |
360 | int function_found = 0; | |
361 | ||
362 | /* go look if there is another minimal symbol with the same name as | |
363 | this one, but with type mst_text. This would happen if the msym | |
364 | is an actual trampoline, in which case there would be another | |
365 | symbol with the same name corresponding to the real function */ | |
366 | ||
367 | ALL_MSYMBOLS (objfile, msymbol) | |
368 | { | |
369 | if (MSYMBOL_TYPE (msymbol) == mst_text | |
370 | && DEPRECATED_STREQ (DEPRECATED_SYMBOL_NAME (msymbol), DEPRECATED_SYMBOL_NAME (msym))) | |
371 | { | |
372 | function_found = 1; | |
373 | break; | |
374 | } | |
375 | } | |
376 | ||
377 | if (function_found) | |
378 | /* the type of msym is correct (mst_solib_trampoline), but | |
379 | the unwind info is wrong, so set it to the correct value */ | |
380 | u->stub_unwind.stub_type = EXPORT; | |
381 | else | |
382 | /* the stub type info in the unwind is correct (this is not a | |
383 | trampoline), but the msym type information is wrong, it | |
384 | should be mst_text. So we need to fix the msym, and also | |
385 | get out of this function */ | |
386 | { | |
387 | MSYMBOL_TYPE (msym) = mst_text; | |
388 | return orig_pc == pc ? 0 : pc & ~0x3; | |
389 | } | |
390 | } | |
391 | ||
392 | /*--------------------------------------------------------------------------*/ | |
393 | } | |
394 | ||
395 | /* It's a stub. Search for a branch and figure out where it goes. | |
396 | Note we have to handle multi insn branch sequences like ldil;ble. | |
397 | Most (all?) other branches can be determined by examining the contents | |
398 | of certain registers and the stack. */ | |
399 | ||
400 | loc = pc; | |
401 | curr_inst = 0; | |
402 | prev_inst = 0; | |
403 | while (1) | |
404 | { | |
405 | /* Make sure we haven't walked outside the range of this stub. */ | |
406 | if (u != find_unwind_entry (loc)) | |
407 | { | |
408 | warning ("Unable to find branch in linker stub"); | |
409 | return orig_pc == pc ? 0 : pc & ~0x3; | |
410 | } | |
411 | ||
412 | prev_inst = curr_inst; | |
413 | curr_inst = read_memory_integer (loc, 4); | |
414 | ||
415 | /* Does it look like a branch external using %r1? Then it's the | |
416 | branch from the stub to the actual function. */ | |
417 | if ((curr_inst & 0xffe0e000) == 0xe0202000) | |
418 | { | |
419 | /* Yup. See if the previous instruction loaded | |
420 | a value into %r1. If so compute and return the jump address. */ | |
421 | if ((prev_inst & 0xffe00000) == 0x20200000) | |
422 | return (hppa_extract_21 (prev_inst) + hppa_extract_17 (curr_inst)) & ~0x3; | |
423 | else | |
424 | { | |
425 | warning ("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1)."); | |
426 | return orig_pc == pc ? 0 : pc & ~0x3; | |
427 | } | |
428 | } | |
429 | ||
430 | /* Does it look like a be 0(sr0,%r21)? OR | |
431 | Does it look like a be, n 0(sr0,%r21)? OR | |
432 | Does it look like a bve (r21)? (this is on PA2.0) | |
433 | Does it look like a bve, n(r21)? (this is also on PA2.0) | |
434 | That's the branch from an | |
435 | import stub to an export stub. | |
436 | ||
437 | It is impossible to determine the target of the branch via | |
438 | simple examination of instructions and/or data (consider | |
439 | that the address in the plabel may be the address of the | |
440 | bind-on-reference routine in the dynamic loader). | |
441 | ||
442 | So we have try an alternative approach. | |
443 | ||
444 | Get the name of the symbol at our current location; it should | |
445 | be a stub symbol with the same name as the symbol in the | |
446 | shared library. | |
447 | ||
448 | Then lookup a minimal symbol with the same name; we should | |
449 | get the minimal symbol for the target routine in the shared | |
450 | library as those take precedence of import/export stubs. */ | |
451 | if ((curr_inst == 0xe2a00000) || | |
452 | (curr_inst == 0xe2a00002) || | |
453 | (curr_inst == 0xeaa0d000) || | |
454 | (curr_inst == 0xeaa0d002)) | |
455 | { | |
456 | struct minimal_symbol *stubsym, *libsym; | |
457 | ||
458 | stubsym = lookup_minimal_symbol_by_pc (loc); | |
459 | if (stubsym == NULL) | |
460 | { | |
461 | warning ("Unable to find symbol for 0x%lx", loc); | |
462 | return orig_pc == pc ? 0 : pc & ~0x3; | |
463 | } | |
464 | ||
465 | libsym = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym), NULL, NULL); | |
466 | if (libsym == NULL) | |
467 | { | |
468 | warning ("Unable to find library symbol for %s\n", | |
469 | DEPRECATED_SYMBOL_NAME (stubsym)); | |
470 | return orig_pc == pc ? 0 : pc & ~0x3; | |
471 | } | |
472 | ||
473 | return SYMBOL_VALUE (libsym); | |
474 | } | |
475 | ||
476 | /* Does it look like bl X,%rp or bl X,%r0? Another way to do a | |
477 | branch from the stub to the actual function. */ | |
478 | /*elz */ | |
479 | else if ((curr_inst & 0xffe0e000) == 0xe8400000 | |
480 | || (curr_inst & 0xffe0e000) == 0xe8000000 | |
481 | || (curr_inst & 0xffe0e000) == 0xe800A000) | |
482 | return (loc + hppa_extract_17 (curr_inst) + 8) & ~0x3; | |
483 | ||
484 | /* Does it look like bv (rp)? Note this depends on the | |
485 | current stack pointer being the same as the stack | |
486 | pointer in the stub itself! This is a branch on from the | |
487 | stub back to the original caller. */ | |
488 | /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */ | |
489 | else if ((curr_inst & 0xffe0f000) == 0xe840c000) | |
490 | { | |
491 | /* Yup. See if the previous instruction loaded | |
492 | rp from sp - 8. */ | |
493 | if (prev_inst == 0x4bc23ff1) | |
494 | return (read_memory_integer | |
495 | (read_register (HPPA_SP_REGNUM) - 8, 4)) & ~0x3; | |
496 | else | |
497 | { | |
498 | warning ("Unable to find restore of %%rp before bv (%%rp)."); | |
499 | return orig_pc == pc ? 0 : pc & ~0x3; | |
500 | } | |
501 | } | |
502 | ||
503 | /* elz: added this case to capture the new instruction | |
504 | at the end of the return part of an export stub used by | |
505 | the PA2.0: BVE, n (rp) */ | |
506 | else if ((curr_inst & 0xffe0f000) == 0xe840d000) | |
507 | { | |
508 | return (read_memory_integer | |
509 | (read_register (HPPA_SP_REGNUM) - 24, TARGET_PTR_BIT / 8)) & ~0x3; | |
510 | } | |
511 | ||
512 | /* What about be,n 0(sr0,%rp)? It's just another way we return to | |
513 | the original caller from the stub. Used in dynamic executables. */ | |
514 | else if (curr_inst == 0xe0400002) | |
515 | { | |
516 | /* The value we jump to is sitting in sp - 24. But that's | |
517 | loaded several instructions before the be instruction. | |
518 | I guess we could check for the previous instruction being | |
519 | mtsp %r1,%sr0 if we want to do sanity checking. */ | |
520 | return (read_memory_integer | |
521 | (read_register (HPPA_SP_REGNUM) - 24, TARGET_PTR_BIT / 8)) & ~0x3; | |
522 | } | |
523 | ||
524 | /* Haven't found the branch yet, but we're still in the stub. | |
525 | Keep looking. */ | |
526 | loc += 4; | |
527 | } | |
528 | } | |
529 | ||
5aac166f RC |
530 | void |
531 | hppa_skip_permanent_breakpoint (void) | |
532 | { | |
533 | /* To step over a breakpoint instruction on the PA takes some | |
534 | fiddling with the instruction address queue. | |
535 | ||
536 | When we stop at a breakpoint, the IA queue front (the instruction | |
537 | we're executing now) points at the breakpoint instruction, and | |
538 | the IA queue back (the next instruction to execute) points to | |
539 | whatever instruction we would execute after the breakpoint, if it | |
540 | were an ordinary instruction. This is the case even if the | |
541 | breakpoint is in the delay slot of a branch instruction. | |
542 | ||
543 | Clearly, to step past the breakpoint, we need to set the queue | |
544 | front to the back. But what do we put in the back? What | |
545 | instruction comes after that one? Because of the branch delay | |
546 | slot, the next insn is always at the back + 4. */ | |
547 | write_register (HPPA_PCOQ_HEAD_REGNUM, read_register (HPPA_PCOQ_TAIL_REGNUM)); | |
548 | write_register (HPPA_PCSQ_HEAD_REGNUM, read_register (HPPA_PCSQ_TAIL_REGNUM)); | |
549 | ||
550 | write_register (HPPA_PCOQ_TAIL_REGNUM, read_register (HPPA_PCOQ_TAIL_REGNUM) + 4); | |
551 | /* We can leave the tail's space the same, since there's no jump. */ | |
552 | } | |
abc485a1 | 553 | |
4c02c60c AC |
554 | /* Exception handling support for the HP-UX ANSI C++ compiler. |
555 | The compiler (aCC) provides a callback for exception events; | |
556 | GDB can set a breakpoint on this callback and find out what | |
557 | exception event has occurred. */ | |
558 | ||
559 | /* The name of the hook to be set to point to the callback function */ | |
560 | static char HP_ACC_EH_notify_hook[] = "__eh_notify_hook"; | |
561 | /* The name of the function to be used to set the hook value */ | |
562 | static char HP_ACC_EH_set_hook_value[] = "__eh_set_hook_value"; | |
563 | /* The name of the callback function in end.o */ | |
564 | static char HP_ACC_EH_notify_callback[] = "__d_eh_notify_callback"; | |
565 | /* Name of function in end.o on which a break is set (called by above) */ | |
566 | static char HP_ACC_EH_break[] = "__d_eh_break"; | |
567 | /* Name of flag (in end.o) that enables catching throws */ | |
568 | static char HP_ACC_EH_catch_throw[] = "__d_eh_catch_throw"; | |
569 | /* Name of flag (in end.o) that enables catching catching */ | |
570 | static char HP_ACC_EH_catch_catch[] = "__d_eh_catch_catch"; | |
571 | /* The enum used by aCC */ | |
572 | typedef enum | |
573 | { | |
574 | __EH_NOTIFY_THROW, | |
575 | __EH_NOTIFY_CATCH | |
576 | } | |
577 | __eh_notification; | |
578 | ||
579 | /* Is exception-handling support available with this executable? */ | |
580 | static int hp_cxx_exception_support = 0; | |
581 | /* Has the initialize function been run? */ | |
90f943f1 | 582 | static int hp_cxx_exception_support_initialized = 0; |
4c02c60c AC |
583 | /* Address of __eh_notify_hook */ |
584 | static CORE_ADDR eh_notify_hook_addr = 0; | |
585 | /* Address of __d_eh_notify_callback */ | |
586 | static CORE_ADDR eh_notify_callback_addr = 0; | |
587 | /* Address of __d_eh_break */ | |
588 | static CORE_ADDR eh_break_addr = 0; | |
589 | /* Address of __d_eh_catch_catch */ | |
590 | static CORE_ADDR eh_catch_catch_addr = 0; | |
591 | /* Address of __d_eh_catch_throw */ | |
592 | static CORE_ADDR eh_catch_throw_addr = 0; | |
593 | /* Sal for __d_eh_break */ | |
594 | static struct symtab_and_line *break_callback_sal = 0; | |
595 | ||
596 | /* Code in end.c expects __d_pid to be set in the inferior, | |
597 | otherwise __d_eh_notify_callback doesn't bother to call | |
598 | __d_eh_break! So we poke the pid into this symbol | |
599 | ourselves. | |
600 | 0 => success | |
601 | 1 => failure */ | |
1c95a4ac | 602 | static int |
4c02c60c AC |
603 | setup_d_pid_in_inferior (void) |
604 | { | |
605 | CORE_ADDR anaddr; | |
606 | struct minimal_symbol *msymbol; | |
607 | char buf[4]; /* FIXME 32x64? */ | |
608 | ||
609 | /* Slam the pid of the process into __d_pid; failing is only a warning! */ | |
610 | msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile); | |
611 | if (msymbol == NULL) | |
612 | { | |
613 | warning ("Unable to find __d_pid symbol in object file."); | |
614 | warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o)."); | |
615 | return 1; | |
616 | } | |
617 | ||
618 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
619 | store_unsigned_integer (buf, 4, PIDGET (inferior_ptid)); /* FIXME 32x64? */ | |
620 | if (target_write_memory (anaddr, buf, 4)) /* FIXME 32x64? */ | |
621 | { | |
622 | warning ("Unable to write __d_pid"); | |
623 | warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o)."); | |
624 | return 1; | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
629 | /* elz: Used to lookup a symbol in the shared libraries. | |
630 | This function calls shl_findsym, indirectly through a | |
631 | call to __d_shl_get. __d_shl_get is in end.c, which is always | |
632 | linked in by the hp compilers/linkers. | |
633 | The call to shl_findsym cannot be made directly because it needs | |
634 | to be active in target address space. | |
635 | inputs: - minimal symbol pointer for the function we want to look up | |
636 | - address in target space of the descriptor for the library | |
637 | where we want to look the symbol up. | |
638 | This address is retrieved using the | |
639 | som_solib_get_solib_by_pc function (somsolib.c). | |
640 | output: - real address in the library of the function. | |
641 | note: the handle can be null, in which case shl_findsym will look for | |
642 | the symbol in all the loaded shared libraries. | |
643 | files to look at if you need reference on this stuff: | |
644 | dld.c, dld_shl_findsym.c | |
645 | end.c | |
646 | man entry for shl_findsym */ | |
647 | ||
1c95a4ac | 648 | static CORE_ADDR |
4c02c60c AC |
649 | find_stub_with_shl_get (struct minimal_symbol *function, CORE_ADDR handle) |
650 | { | |
651 | struct symbol *get_sym, *symbol2; | |
652 | struct minimal_symbol *buff_minsym, *msymbol; | |
653 | struct type *ftype; | |
654 | struct value **args; | |
655 | struct value *funcval; | |
656 | struct value *val; | |
657 | ||
658 | int x, namelen, err_value, tmp = -1; | |
659 | CORE_ADDR endo_buff_addr, value_return_addr, errno_return_addr; | |
660 | CORE_ADDR stub_addr; | |
661 | ||
662 | ||
663 | args = alloca (sizeof (struct value *) * 8); /* 6 for the arguments and one null one??? */ | |
664 | funcval = find_function_in_inferior ("__d_shl_get"); | |
665 | get_sym = lookup_symbol ("__d_shl_get", NULL, VAR_DOMAIN, NULL, NULL); | |
666 | buff_minsym = lookup_minimal_symbol ("__buffer", NULL, NULL); | |
667 | msymbol = lookup_minimal_symbol ("__shldp", NULL, NULL); | |
668 | symbol2 = lookup_symbol ("__shldp", NULL, VAR_DOMAIN, NULL, NULL); | |
669 | endo_buff_addr = SYMBOL_VALUE_ADDRESS (buff_minsym); | |
670 | namelen = strlen (DEPRECATED_SYMBOL_NAME (function)); | |
671 | value_return_addr = endo_buff_addr + namelen; | |
672 | ftype = check_typedef (SYMBOL_TYPE (get_sym)); | |
673 | ||
674 | /* do alignment */ | |
675 | if ((x = value_return_addr % 64) != 0) | |
676 | value_return_addr = value_return_addr + 64 - x; | |
677 | ||
678 | errno_return_addr = value_return_addr + 64; | |
679 | ||
680 | ||
681 | /* set up stuff needed by __d_shl_get in buffer in end.o */ | |
682 | ||
683 | target_write_memory (endo_buff_addr, DEPRECATED_SYMBOL_NAME (function), namelen); | |
684 | ||
685 | target_write_memory (value_return_addr, (char *) &tmp, 4); | |
686 | ||
687 | target_write_memory (errno_return_addr, (char *) &tmp, 4); | |
688 | ||
689 | target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), | |
690 | (char *) &handle, 4); | |
691 | ||
692 | /* now prepare the arguments for the call */ | |
693 | ||
694 | args[0] = value_from_longest (TYPE_FIELD_TYPE (ftype, 0), 12); | |
695 | args[1] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 1), SYMBOL_VALUE_ADDRESS (msymbol)); | |
696 | args[2] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 2), endo_buff_addr); | |
697 | args[3] = value_from_longest (TYPE_FIELD_TYPE (ftype, 3), TYPE_PROCEDURE); | |
698 | args[4] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 4), value_return_addr); | |
699 | args[5] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 5), errno_return_addr); | |
700 | ||
701 | /* now call the function */ | |
702 | ||
703 | val = call_function_by_hand (funcval, 6, args); | |
704 | ||
705 | /* now get the results */ | |
706 | ||
707 | target_read_memory (errno_return_addr, (char *) &err_value, sizeof (err_value)); | |
708 | ||
709 | target_read_memory (value_return_addr, (char *) &stub_addr, sizeof (stub_addr)); | |
710 | if (stub_addr <= 0) | |
711 | error ("call to __d_shl_get failed, error code is %d", err_value); | |
712 | ||
713 | return (stub_addr); | |
714 | } | |
715 | ||
716 | /* Cover routine for find_stub_with_shl_get to pass to catch_errors */ | |
717 | static int | |
718 | cover_find_stub_with_shl_get (void *args_untyped) | |
719 | { | |
720 | args_for_find_stub *args = args_untyped; | |
721 | args->return_val = find_stub_with_shl_get (args->msym, args->solib_handle); | |
722 | return 0; | |
723 | } | |
724 | ||
725 | /* Initialize exception catchpoint support by looking for the | |
726 | necessary hooks/callbacks in end.o, etc., and set the hook value to | |
727 | point to the required debug function | |
728 | ||
729 | Return 0 => failure | |
730 | 1 => success */ | |
731 | ||
732 | static int | |
733 | initialize_hp_cxx_exception_support (void) | |
734 | { | |
735 | struct symtabs_and_lines sals; | |
736 | struct cleanup *old_chain; | |
737 | struct cleanup *canonical_strings_chain = NULL; | |
738 | int i; | |
739 | char *addr_start; | |
740 | char *addr_end = NULL; | |
741 | char **canonical = (char **) NULL; | |
742 | int thread = -1; | |
743 | struct symbol *sym = NULL; | |
744 | struct minimal_symbol *msym = NULL; | |
745 | struct objfile *objfile; | |
746 | asection *shlib_info; | |
747 | ||
748 | /* Detect and disallow recursion. On HP-UX with aCC, infinite | |
749 | recursion is a possibility because finding the hook for exception | |
750 | callbacks involves making a call in the inferior, which means | |
751 | re-inserting breakpoints which can re-invoke this code */ | |
752 | ||
753 | static int recurse = 0; | |
754 | if (recurse > 0) | |
755 | { | |
756 | hp_cxx_exception_support_initialized = 0; | |
f83f82bc | 757 | deprecated_exception_support_initialized = 0; |
4c02c60c AC |
758 | return 0; |
759 | } | |
760 | ||
761 | hp_cxx_exception_support = 0; | |
762 | ||
763 | /* First check if we have seen any HP compiled objects; if not, | |
764 | it is very unlikely that HP's idiosyncratic callback mechanism | |
765 | for exception handling debug support will be available! | |
766 | This will percolate back up to breakpoint.c, where our callers | |
767 | will decide to try the g++ exception-handling support instead. */ | |
f83f82bc | 768 | if (!deprecated_hp_som_som_object_present) |
4c02c60c AC |
769 | return 0; |
770 | ||
771 | /* We have a SOM executable with SOM debug info; find the hooks */ | |
772 | ||
773 | /* First look for the notify hook provided by aCC runtime libs */ | |
774 | /* If we find this symbol, we conclude that the executable must | |
775 | have HP aCC exception support built in. If this symbol is not | |
776 | found, even though we're a HP SOM-SOM file, we may have been | |
777 | built with some other compiler (not aCC). This results percolates | |
778 | back up to our callers in breakpoint.c which can decide to | |
779 | try the g++ style of exception support instead. | |
780 | If this symbol is found but the other symbols we require are | |
781 | not found, there is something weird going on, and g++ support | |
782 | should *not* be tried as an alternative. | |
783 | ||
784 | ASSUMPTION: Only HP aCC code will have __eh_notify_hook defined. | |
785 | ASSUMPTION: HP aCC and g++ modules cannot be linked together. */ | |
786 | ||
787 | /* libCsup has this hook; it'll usually be non-debuggable */ | |
788 | msym = lookup_minimal_symbol (HP_ACC_EH_notify_hook, NULL, NULL); | |
789 | if (msym) | |
790 | { | |
791 | eh_notify_hook_addr = SYMBOL_VALUE_ADDRESS (msym); | |
792 | hp_cxx_exception_support = 1; | |
793 | } | |
794 | else | |
795 | { | |
796 | warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook); | |
797 | warning ("Executable may not have been compiled debuggable with HP aCC."); | |
798 | warning ("GDB will be unable to intercept exception events."); | |
799 | eh_notify_hook_addr = 0; | |
800 | hp_cxx_exception_support = 0; | |
801 | return 0; | |
802 | } | |
803 | ||
804 | /* Next look for the notify callback routine in end.o */ | |
805 | /* This is always available in the SOM symbol dictionary if end.o is linked in */ | |
806 | msym = lookup_minimal_symbol (HP_ACC_EH_notify_callback, NULL, NULL); | |
807 | if (msym) | |
808 | { | |
809 | eh_notify_callback_addr = SYMBOL_VALUE_ADDRESS (msym); | |
810 | hp_cxx_exception_support = 1; | |
811 | } | |
812 | else | |
813 | { | |
814 | warning ("Unable to find exception callback routine (%s).", HP_ACC_EH_notify_callback); | |
815 | warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o)."); | |
816 | warning ("GDB will be unable to intercept exception events."); | |
817 | eh_notify_callback_addr = 0; | |
818 | return 0; | |
819 | } | |
820 | ||
821 | #ifndef GDB_TARGET_IS_HPPA_20W | |
822 | /* Check whether the executable is dynamically linked or archive bound */ | |
823 | /* With an archive-bound executable we can use the raw addresses we find | |
824 | for the callback function, etc. without modification. For an executable | |
825 | with shared libraries, we have to do more work to find the plabel, which | |
826 | can be the target of a call through $$dyncall from the aCC runtime support | |
827 | library (libCsup) which is linked shared by default by aCC. */ | |
828 | /* This test below was copied from somsolib.c/somread.c. It may not be a very | |
829 | reliable one to test that an executable is linked shared. pai/1997-07-18 */ | |
830 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
831 | if (shlib_info && (bfd_section_size (symfile_objfile->obfd, shlib_info) != 0)) | |
832 | { | |
833 | /* The minsym we have has the local code address, but that's not the | |
834 | plabel that can be used by an inter-load-module call. */ | |
835 | /* Find solib handle for main image (which has end.o), and use that | |
836 | and the min sym as arguments to __d_shl_get() (which does the equivalent | |
837 | of shl_findsym()) to find the plabel. */ | |
838 | ||
839 | args_for_find_stub args; | |
840 | static char message[] = "Error while finding exception callback hook:\n"; | |
841 | ||
4bb7a266 | 842 | args.solib_handle = gdbarch_tdep (current_gdbarch)->solib_get_solib_by_pc (eh_notify_callback_addr); |
4c02c60c AC |
843 | args.msym = msym; |
844 | args.return_val = 0; | |
845 | ||
846 | recurse++; | |
847 | catch_errors (cover_find_stub_with_shl_get, &args, message, | |
848 | RETURN_MASK_ALL); | |
849 | eh_notify_callback_addr = args.return_val; | |
850 | recurse--; | |
851 | ||
f83f82bc | 852 | deprecated_exception_catchpoints_are_fragile = 1; |
4c02c60c AC |
853 | |
854 | if (!eh_notify_callback_addr) | |
855 | { | |
856 | /* We can get here either if there is no plabel in the export list | |
857 | for the main image, or if something strange happened (?) */ | |
858 | warning ("Couldn't find a plabel (indirect function label) for the exception callback."); | |
859 | warning ("GDB will not be able to intercept exception events."); | |
860 | return 0; | |
861 | } | |
862 | } | |
863 | else | |
f83f82bc | 864 | deprecated_exception_catchpoints_are_fragile = 0; |
4c02c60c AC |
865 | #endif |
866 | ||
867 | /* Now, look for the breakpointable routine in end.o */ | |
868 | /* This should also be available in the SOM symbol dict. if end.o linked in */ | |
869 | msym = lookup_minimal_symbol (HP_ACC_EH_break, NULL, NULL); | |
870 | if (msym) | |
871 | { | |
872 | eh_break_addr = SYMBOL_VALUE_ADDRESS (msym); | |
873 | hp_cxx_exception_support = 1; | |
874 | } | |
875 | else | |
876 | { | |
877 | warning ("Unable to find exception callback routine to set breakpoint (%s).", HP_ACC_EH_break); | |
878 | warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o)."); | |
879 | warning ("GDB will be unable to intercept exception events."); | |
880 | eh_break_addr = 0; | |
881 | return 0; | |
882 | } | |
883 | ||
884 | /* Next look for the catch enable flag provided in end.o */ | |
885 | sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL, | |
886 | VAR_DOMAIN, 0, (struct symtab **) NULL); | |
887 | if (sym) /* sometimes present in debug info */ | |
888 | { | |
889 | eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (sym); | |
890 | hp_cxx_exception_support = 1; | |
891 | } | |
892 | else | |
893 | /* otherwise look in SOM symbol dict. */ | |
894 | { | |
895 | msym = lookup_minimal_symbol (HP_ACC_EH_catch_catch, NULL, NULL); | |
896 | if (msym) | |
897 | { | |
898 | eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (msym); | |
899 | hp_cxx_exception_support = 1; | |
900 | } | |
901 | else | |
902 | { | |
903 | warning ("Unable to enable interception of exception catches."); | |
904 | warning ("Executable may not have been compiled debuggable with HP aCC."); | |
905 | warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o)."); | |
906 | return 0; | |
907 | } | |
908 | } | |
909 | ||
910 | /* Next look for the catch enable flag provided end.o */ | |
911 | sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL, | |
912 | VAR_DOMAIN, 0, (struct symtab **) NULL); | |
913 | if (sym) /* sometimes present in debug info */ | |
914 | { | |
915 | eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (sym); | |
916 | hp_cxx_exception_support = 1; | |
917 | } | |
918 | else | |
919 | /* otherwise look in SOM symbol dict. */ | |
920 | { | |
921 | msym = lookup_minimal_symbol (HP_ACC_EH_catch_throw, NULL, NULL); | |
922 | if (msym) | |
923 | { | |
924 | eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (msym); | |
925 | hp_cxx_exception_support = 1; | |
926 | } | |
927 | else | |
928 | { | |
929 | warning ("Unable to enable interception of exception throws."); | |
930 | warning ("Executable may not have been compiled debuggable with HP aCC."); | |
931 | warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o)."); | |
932 | return 0; | |
933 | } | |
934 | } | |
935 | ||
936 | /* Set the flags */ | |
937 | hp_cxx_exception_support = 2; /* everything worked so far */ | |
938 | hp_cxx_exception_support_initialized = 1; | |
f83f82bc | 939 | deprecated_exception_support_initialized = 1; |
4c02c60c AC |
940 | |
941 | return 1; | |
942 | } | |
943 | ||
944 | /* Target operation for enabling or disabling interception of | |
945 | exception events. | |
946 | KIND is either EX_EVENT_THROW or EX_EVENT_CATCH | |
947 | ENABLE is either 0 (disable) or 1 (enable). | |
948 | Return value is NULL if no support found; | |
949 | -1 if something went wrong, | |
950 | or a pointer to a symtab/line struct if the breakpointable | |
951 | address was found. */ | |
952 | ||
953 | struct symtab_and_line * | |
954 | child_enable_exception_callback (enum exception_event_kind kind, int enable) | |
955 | { | |
956 | char buf[4]; | |
957 | ||
f83f82bc AC |
958 | if (!deprecated_exception_support_initialized |
959 | || !hp_cxx_exception_support_initialized) | |
4c02c60c AC |
960 | if (!initialize_hp_cxx_exception_support ()) |
961 | return NULL; | |
962 | ||
963 | switch (hp_cxx_exception_support) | |
964 | { | |
965 | case 0: | |
966 | /* Assuming no HP support at all */ | |
967 | return NULL; | |
968 | case 1: | |
969 | /* HP support should be present, but something went wrong */ | |
970 | return (struct symtab_and_line *) -1; /* yuck! */ | |
971 | /* there may be other cases in the future */ | |
972 | } | |
973 | ||
974 | /* Set the EH hook to point to the callback routine */ | |
975 | store_unsigned_integer (buf, 4, enable ? eh_notify_callback_addr : 0); /* FIXME 32x64 problem */ | |
976 | /* pai: (temp) FIXME should there be a pack operation first? */ | |
977 | if (target_write_memory (eh_notify_hook_addr, buf, 4)) /* FIXME 32x64 problem */ | |
978 | { | |
979 | warning ("Could not write to target memory for exception event callback."); | |
980 | warning ("Interception of exception events may not work."); | |
981 | return (struct symtab_and_line *) -1; | |
982 | } | |
983 | if (enable) | |
984 | { | |
985 | /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-( */ | |
986 | if (PIDGET (inferior_ptid) > 0) | |
987 | { | |
988 | if (setup_d_pid_in_inferior ()) | |
989 | return (struct symtab_and_line *) -1; | |
990 | } | |
991 | else | |
992 | { | |
993 | warning ("Internal error: Invalid inferior pid? Cannot intercept exception events."); | |
994 | return (struct symtab_and_line *) -1; | |
995 | } | |
996 | } | |
997 | ||
998 | switch (kind) | |
999 | { | |
1000 | case EX_EVENT_THROW: | |
1001 | store_unsigned_integer (buf, 4, enable ? 1 : 0); | |
1002 | if (target_write_memory (eh_catch_throw_addr, buf, 4)) /* FIXME 32x64? */ | |
1003 | { | |
1004 | warning ("Couldn't enable exception throw interception."); | |
1005 | return (struct symtab_and_line *) -1; | |
1006 | } | |
1007 | break; | |
1008 | case EX_EVENT_CATCH: | |
1009 | store_unsigned_integer (buf, 4, enable ? 1 : 0); | |
1010 | if (target_write_memory (eh_catch_catch_addr, buf, 4)) /* FIXME 32x64? */ | |
1011 | { | |
1012 | warning ("Couldn't enable exception catch interception."); | |
1013 | return (struct symtab_and_line *) -1; | |
1014 | } | |
1015 | break; | |
1016 | default: | |
1017 | error ("Request to enable unknown or unsupported exception event."); | |
1018 | } | |
1019 | ||
3cd36e7c | 1020 | /* Copy break address into new sal struct, malloc'ing if needed. */ |
4c02c60c | 1021 | if (!break_callback_sal) |
3cd36e7c | 1022 | break_callback_sal = XMALLOC (struct symtab_and_line); |
4c02c60c AC |
1023 | init_sal (break_callback_sal); |
1024 | break_callback_sal->symtab = NULL; | |
1025 | break_callback_sal->pc = eh_break_addr; | |
1026 | break_callback_sal->line = 0; | |
1027 | break_callback_sal->end = eh_break_addr; | |
1028 | ||
1029 | return break_callback_sal; | |
1030 | } | |
1031 | ||
1032 | /* Record some information about the current exception event */ | |
1033 | static struct exception_event_record current_ex_event; | |
1034 | /* Convenience struct */ | |
1035 | static struct symtab_and_line null_symtab_and_line = | |
1036 | {NULL, 0, 0, 0}; | |
1037 | ||
1038 | /* Report current exception event. Returns a pointer to a record | |
1039 | that describes the kind of the event, where it was thrown from, | |
1040 | and where it will be caught. More information may be reported | |
1041 | in the future */ | |
1042 | struct exception_event_record * | |
1043 | child_get_current_exception_event (void) | |
1044 | { | |
1045 | CORE_ADDR event_kind; | |
1046 | CORE_ADDR throw_addr; | |
1047 | CORE_ADDR catch_addr; | |
1048 | struct frame_info *fi, *curr_frame; | |
1049 | int level = 1; | |
1050 | ||
1051 | curr_frame = get_current_frame (); | |
1052 | if (!curr_frame) | |
1053 | return (struct exception_event_record *) NULL; | |
1054 | ||
1055 | /* Go up one frame to __d_eh_notify_callback, because at the | |
1056 | point when this code is executed, there's garbage in the | |
1057 | arguments of __d_eh_break. */ | |
1058 | fi = find_relative_frame (curr_frame, &level); | |
1059 | if (level != 0) | |
1060 | return (struct exception_event_record *) NULL; | |
1061 | ||
1062 | select_frame (fi); | |
1063 | ||
1064 | /* Read in the arguments */ | |
1065 | /* __d_eh_notify_callback() is called with 3 arguments: | |
1066 | 1. event kind catch or throw | |
1067 | 2. the target address if known | |
1068 | 3. a flag -- not sure what this is. pai/1997-07-17 */ | |
34f75cc1 RC |
1069 | event_kind = read_register (HPPA_ARG0_REGNUM); |
1070 | catch_addr = read_register (HPPA_ARG1_REGNUM); | |
4c02c60c AC |
1071 | |
1072 | /* Now go down to a user frame */ | |
1073 | /* For a throw, __d_eh_break is called by | |
1074 | __d_eh_notify_callback which is called by | |
1075 | __notify_throw which is called | |
1076 | from user code. | |
1077 | For a catch, __d_eh_break is called by | |
1078 | __d_eh_notify_callback which is called by | |
1079 | <stackwalking stuff> which is called by | |
1080 | __throw__<stuff> or __rethrow_<stuff> which is called | |
1081 | from user code. */ | |
1082 | /* FIXME: Don't use such magic numbers; search for the frames */ | |
1083 | level = (event_kind == EX_EVENT_THROW) ? 3 : 4; | |
1084 | fi = find_relative_frame (curr_frame, &level); | |
1085 | if (level != 0) | |
1086 | return (struct exception_event_record *) NULL; | |
1087 | ||
1088 | select_frame (fi); | |
1089 | throw_addr = get_frame_pc (fi); | |
1090 | ||
1091 | /* Go back to original (top) frame */ | |
1092 | select_frame (curr_frame); | |
1093 | ||
1094 | current_ex_event.kind = (enum exception_event_kind) event_kind; | |
1095 | current_ex_event.throw_sal = find_pc_line (throw_addr, 1); | |
1096 | current_ex_event.catch_sal = find_pc_line (catch_addr, 1); | |
1097 | ||
1098 | return ¤t_ex_event; | |
1099 | } | |
1100 | ||
43613416 RC |
1101 | /* Signal frames. */ |
1102 | struct hppa_hpux_sigtramp_unwind_cache | |
1103 | { | |
1104 | CORE_ADDR base; | |
1105 | struct trad_frame_saved_reg *saved_regs; | |
1106 | }; | |
1107 | ||
1108 | static int hppa_hpux_tramp_reg[] = { | |
1109 | HPPA_SAR_REGNUM, | |
1110 | HPPA_PCOQ_HEAD_REGNUM, | |
1111 | HPPA_PCSQ_HEAD_REGNUM, | |
1112 | HPPA_PCOQ_TAIL_REGNUM, | |
1113 | HPPA_PCSQ_TAIL_REGNUM, | |
1114 | HPPA_EIEM_REGNUM, | |
1115 | HPPA_IIR_REGNUM, | |
1116 | HPPA_ISR_REGNUM, | |
1117 | HPPA_IOR_REGNUM, | |
1118 | HPPA_IPSW_REGNUM, | |
1119 | -1, | |
1120 | HPPA_SR4_REGNUM, | |
1121 | HPPA_SR4_REGNUM + 1, | |
1122 | HPPA_SR4_REGNUM + 2, | |
1123 | HPPA_SR4_REGNUM + 3, | |
1124 | HPPA_SR4_REGNUM + 4, | |
1125 | HPPA_SR4_REGNUM + 5, | |
1126 | HPPA_SR4_REGNUM + 6, | |
1127 | HPPA_SR4_REGNUM + 7, | |
1128 | HPPA_RCR_REGNUM, | |
1129 | HPPA_PID0_REGNUM, | |
1130 | HPPA_PID1_REGNUM, | |
1131 | HPPA_CCR_REGNUM, | |
1132 | HPPA_PID2_REGNUM, | |
1133 | HPPA_PID3_REGNUM, | |
1134 | HPPA_TR0_REGNUM, | |
1135 | HPPA_TR0_REGNUM + 1, | |
1136 | HPPA_TR0_REGNUM + 2, | |
1137 | HPPA_CR27_REGNUM | |
1138 | }; | |
1139 | ||
1140 | static struct hppa_hpux_sigtramp_unwind_cache * | |
1141 | hppa_hpux_sigtramp_frame_unwind_cache (struct frame_info *next_frame, | |
1142 | void **this_cache) | |
1143 | ||
1144 | { | |
1145 | struct gdbarch *gdbarch = get_frame_arch (next_frame); | |
1146 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
1147 | struct hppa_hpux_sigtramp_unwind_cache *info; | |
1148 | unsigned int flag; | |
1149 | CORE_ADDR sp, scptr; | |
1150 | int i, incr, off, szoff; | |
1151 | ||
1152 | if (*this_cache) | |
1153 | return *this_cache; | |
1154 | ||
1155 | info = FRAME_OBSTACK_ZALLOC (struct hppa_hpux_sigtramp_unwind_cache); | |
1156 | *this_cache = info; | |
1157 | info->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
1158 | ||
1159 | sp = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM); | |
1160 | ||
1161 | scptr = sp - 1352; | |
1162 | off = scptr; | |
1163 | ||
1164 | /* See /usr/include/machine/save_state.h for the structure of the save_state_t | |
1165 | structure. */ | |
1166 | ||
1167 | flag = read_memory_unsigned_integer(scptr, 4); | |
1168 | ||
1169 | if (!(flag & 0x40)) | |
1170 | { | |
1171 | /* Narrow registers. */ | |
1172 | off = scptr + offsetof (save_state_t, ss_narrow); | |
1173 | incr = 4; | |
1174 | szoff = 0; | |
1175 | } | |
1176 | else | |
1177 | { | |
1178 | /* Wide registers. */ | |
1179 | off = scptr + offsetof (save_state_t, ss_wide) + 8; | |
1180 | incr = 8; | |
1181 | szoff = (tdep->bytes_per_address == 4 ? 4 : 0); | |
1182 | } | |
1183 | ||
1184 | for (i = 1; i < 32; i++) | |
1185 | { | |
1186 | info->saved_regs[HPPA_R0_REGNUM + i].addr = off + szoff; | |
1187 | off += incr; | |
1188 | } | |
1189 | ||
01926a69 | 1190 | for (i = 0; i < ARRAY_SIZE (hppa_hpux_tramp_reg); i++) |
43613416 RC |
1191 | { |
1192 | if (hppa_hpux_tramp_reg[i] > 0) | |
1193 | info->saved_regs[hppa_hpux_tramp_reg[i]].addr = off + szoff; | |
1194 | off += incr; | |
1195 | } | |
1196 | ||
1197 | /* TODO: fp regs */ | |
1198 | ||
1199 | info->base = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM); | |
1200 | ||
1201 | return info; | |
1202 | } | |
1203 | ||
1204 | static void | |
1205 | hppa_hpux_sigtramp_frame_this_id (struct frame_info *next_frame, | |
1206 | void **this_prologue_cache, | |
1207 | struct frame_id *this_id) | |
1208 | { | |
1209 | struct hppa_hpux_sigtramp_unwind_cache *info | |
1210 | = hppa_hpux_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache); | |
1211 | *this_id = frame_id_build (info->base, frame_pc_unwind (next_frame)); | |
1212 | } | |
1213 | ||
1214 | static void | |
1215 | hppa_hpux_sigtramp_frame_prev_register (struct frame_info *next_frame, | |
1216 | void **this_prologue_cache, | |
1217 | int regnum, int *optimizedp, | |
1218 | enum lval_type *lvalp, | |
1219 | CORE_ADDR *addrp, | |
1220 | int *realnump, void *valuep) | |
1221 | { | |
1222 | struct hppa_hpux_sigtramp_unwind_cache *info | |
1223 | = hppa_hpux_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache); | |
1224 | hppa_frame_prev_register_helper (next_frame, info->saved_regs, regnum, | |
1225 | optimizedp, lvalp, addrp, realnump, valuep); | |
1226 | } | |
1227 | ||
1228 | static const struct frame_unwind hppa_hpux_sigtramp_frame_unwind = { | |
1229 | SIGTRAMP_FRAME, | |
1230 | hppa_hpux_sigtramp_frame_this_id, | |
1231 | hppa_hpux_sigtramp_frame_prev_register | |
1232 | }; | |
1233 | ||
1234 | static const struct frame_unwind * | |
1235 | hppa_hpux_sigtramp_unwind_sniffer (struct frame_info *next_frame) | |
1236 | { | |
1237 | CORE_ADDR pc = frame_pc_unwind (next_frame); | |
1238 | char *name; | |
1239 | ||
1240 | find_pc_partial_function (pc, &name, NULL, NULL); | |
1241 | ||
1242 | if (name && strcmp(name, "_sigreturn") == 0) | |
1243 | return &hppa_hpux_sigtramp_frame_unwind; | |
1244 | ||
1245 | return NULL; | |
1246 | } | |
1247 | ||
c268433a | 1248 | static CORE_ADDR |
77d18ded | 1249 | hppa32_hpux_find_global_pointer (struct value *function) |
c268433a RC |
1250 | { |
1251 | CORE_ADDR faddr; | |
1252 | ||
1253 | faddr = value_as_address (function); | |
1254 | ||
1255 | /* Is this a plabel? If so, dereference it to get the gp value. */ | |
1256 | if (faddr & 2) | |
1257 | { | |
1258 | int status; | |
1259 | char buf[4]; | |
1260 | ||
1261 | faddr &= ~3; | |
1262 | ||
1263 | status = target_read_memory (faddr + 4, buf, sizeof (buf)); | |
1264 | if (status == 0) | |
1265 | return extract_unsigned_integer (buf, sizeof (buf)); | |
1266 | } | |
1267 | ||
61aff869 | 1268 | return gdbarch_tdep (current_gdbarch)->solib_get_got_by_pc (faddr); |
c268433a RC |
1269 | } |
1270 | ||
1271 | static CORE_ADDR | |
77d18ded | 1272 | hppa64_hpux_find_global_pointer (struct value *function) |
c268433a | 1273 | { |
77d18ded RC |
1274 | CORE_ADDR faddr; |
1275 | char buf[32]; | |
1276 | ||
1277 | faddr = value_as_address (function); | |
1278 | ||
1279 | if (in_opd_section (faddr)) | |
1280 | { | |
1281 | target_read_memory (faddr, buf, sizeof (buf)); | |
1282 | return extract_unsigned_integer (&buf[24], 8); | |
1283 | } | |
1284 | else | |
c268433a | 1285 | { |
77d18ded RC |
1286 | return gdbarch_tdep (current_gdbarch)->solib_get_got_by_pc (faddr); |
1287 | } | |
1288 | } | |
1289 | ||
1290 | static unsigned int ldsid_pattern[] = { | |
1291 | 0x000010a0, /* ldsid (rX),rY */ | |
1292 | 0x00001820, /* mtsp rY,sr0 */ | |
1293 | 0xe0000000 /* be,n (sr0,rX) */ | |
1294 | }; | |
1295 | ||
1296 | static CORE_ADDR | |
1297 | hppa_hpux_search_pattern (CORE_ADDR start, CORE_ADDR end, | |
1298 | unsigned int *patterns, int count) | |
1299 | { | |
1300 | unsigned int *buf; | |
1301 | int offset, i; | |
1302 | int region, insns; | |
1303 | ||
1304 | region = end - start + 4; | |
1305 | insns = region / 4; | |
1306 | buf = (unsigned int *) alloca (region); | |
c268433a | 1307 | |
77d18ded | 1308 | read_memory (start, (char *) buf, region); |
c268433a | 1309 | |
77d18ded RC |
1310 | for (i = 0; i < insns; i++) |
1311 | buf[i] = extract_unsigned_integer (&buf[i], 4); | |
1312 | ||
1313 | for (offset = 0; offset <= insns - count; offset++) | |
1314 | { | |
1315 | for (i = 0; i < count; i++) | |
c268433a | 1316 | { |
77d18ded RC |
1317 | if ((buf[offset + i] & patterns[i]) != patterns[i]) |
1318 | break; | |
1319 | } | |
1320 | if (i == count) | |
1321 | break; | |
1322 | } | |
1323 | ||
1324 | if (offset <= insns - count) | |
1325 | return start + offset * 4; | |
1326 | else | |
1327 | return 0; | |
1328 | } | |
c268433a | 1329 | |
77d18ded RC |
1330 | static CORE_ADDR |
1331 | hppa32_hpux_search_dummy_call_sequence (struct gdbarch *gdbarch, CORE_ADDR pc, | |
1332 | int *argreg) | |
1333 | { | |
1334 | struct objfile *obj; | |
1335 | struct obj_section *sec; | |
1336 | struct hppa_objfile_private *priv; | |
1337 | struct frame_info *frame; | |
1338 | struct unwind_table_entry *u; | |
1339 | CORE_ADDR addr, rp; | |
1340 | char buf[4]; | |
1341 | unsigned int insn; | |
1342 | ||
1343 | sec = find_pc_section (pc); | |
1344 | obj = sec->objfile; | |
1345 | priv = objfile_data (obj, hppa_objfile_priv_data); | |
1346 | ||
1347 | if (!priv) | |
1348 | priv = hppa_init_objfile_priv_data (obj); | |
1349 | if (!priv) | |
1350 | error ("Internal error creating objfile private data.\n"); | |
1351 | ||
1352 | /* Use the cached value if we have one. */ | |
1353 | if (priv->dummy_call_sequence_addr != 0) | |
1354 | { | |
1355 | *argreg = priv->dummy_call_sequence_reg; | |
1356 | return priv->dummy_call_sequence_addr; | |
1357 | } | |
c268433a | 1358 | |
77d18ded RC |
1359 | /* First try a heuristic; if we are in a shared library call, our return |
1360 | pointer is likely to point at an export stub. */ | |
1361 | frame = get_current_frame (); | |
1362 | rp = frame_unwind_register_unsigned (frame, 2); | |
1363 | u = find_unwind_entry (rp); | |
1364 | if (u && u->stub_unwind.stub_type == EXPORT) | |
1365 | { | |
1366 | addr = hppa_hpux_search_pattern (u->region_start, u->region_end, | |
1367 | ldsid_pattern, | |
1368 | ARRAY_SIZE (ldsid_pattern)); | |
1369 | if (addr) | |
1370 | goto found_pattern; | |
1371 | } | |
c268433a | 1372 | |
77d18ded RC |
1373 | /* Next thing to try is to look for an export stub. */ |
1374 | if (priv->unwind_info) | |
1375 | { | |
1376 | int i; | |
c268433a | 1377 | |
77d18ded RC |
1378 | for (i = 0; i < priv->unwind_info->last; i++) |
1379 | { | |
1380 | struct unwind_table_entry *u; | |
1381 | u = &priv->unwind_info->table[i]; | |
1382 | if (u->stub_unwind.stub_type == EXPORT) | |
1383 | { | |
1384 | addr = hppa_hpux_search_pattern (u->region_start, u->region_end, | |
1385 | ldsid_pattern, | |
1386 | ARRAY_SIZE (ldsid_pattern)); | |
1387 | if (addr) | |
1388 | { | |
1389 | goto found_pattern; | |
1390 | } | |
c268433a RC |
1391 | } |
1392 | } | |
77d18ded | 1393 | } |
c268433a | 1394 | |
77d18ded RC |
1395 | /* Finally, if this is the main executable, try to locate a sequence |
1396 | from noshlibs */ | |
1397 | addr = hppa_symbol_address ("noshlibs"); | |
1398 | sec = find_pc_section (addr); | |
1399 | ||
1400 | if (sec && sec->objfile == obj) | |
1401 | { | |
1402 | CORE_ADDR start, end; | |
1403 | ||
1404 | find_pc_partial_function (addr, NULL, &start, &end); | |
1405 | if (start != 0 && end != 0) | |
c268433a | 1406 | { |
77d18ded RC |
1407 | addr = hppa_hpux_search_pattern (start, end, ldsid_pattern, |
1408 | ARRAY_SIZE (ldsid_pattern)); | |
1409 | if (addr) | |
1410 | goto found_pattern; | |
c268433a | 1411 | } |
77d18ded RC |
1412 | } |
1413 | ||
1414 | /* Can't find a suitable sequence. */ | |
1415 | return 0; | |
1416 | ||
1417 | found_pattern: | |
1418 | target_read_memory (addr, buf, sizeof (buf)); | |
1419 | insn = extract_unsigned_integer (buf, sizeof (buf)); | |
1420 | priv->dummy_call_sequence_addr = addr; | |
1421 | priv->dummy_call_sequence_reg = (insn >> 21) & 0x1f; | |
1422 | ||
1423 | *argreg = priv->dummy_call_sequence_reg; | |
1424 | return priv->dummy_call_sequence_addr; | |
1425 | } | |
1426 | ||
1427 | static CORE_ADDR | |
1428 | hppa64_hpux_search_dummy_call_sequence (struct gdbarch *gdbarch, CORE_ADDR pc, | |
1429 | int *argreg) | |
1430 | { | |
1431 | struct objfile *obj; | |
1432 | struct obj_section *sec; | |
1433 | struct hppa_objfile_private *priv; | |
1434 | CORE_ADDR addr; | |
1435 | struct minimal_symbol *msym; | |
1436 | int i; | |
1437 | ||
1438 | sec = find_pc_section (pc); | |
1439 | obj = sec->objfile; | |
1440 | priv = objfile_data (obj, hppa_objfile_priv_data); | |
1441 | ||
1442 | if (!priv) | |
1443 | priv = hppa_init_objfile_priv_data (obj); | |
1444 | if (!priv) | |
1445 | error ("Internal error creating objfile private data.\n"); | |
1446 | ||
1447 | /* Use the cached value if we have one. */ | |
1448 | if (priv->dummy_call_sequence_addr != 0) | |
1449 | { | |
1450 | *argreg = priv->dummy_call_sequence_reg; | |
1451 | return priv->dummy_call_sequence_addr; | |
1452 | } | |
1453 | ||
1454 | /* FIXME: Without stub unwind information, locating a suitable sequence is | |
1455 | fairly difficult. For now, we implement a very naive and inefficient | |
1456 | scheme; try to read in blocks of code, and look for a "bve,n (rp)" | |
1457 | instruction. These are likely to occur at the end of functions, so | |
1458 | we only look at the last two instructions of each function. */ | |
1459 | for (i = 0, msym = obj->msymbols; i < obj->minimal_symbol_count; i++, msym++) | |
1460 | { | |
1461 | CORE_ADDR begin, end; | |
1462 | char *name; | |
1463 | unsigned int insns[2]; | |
1464 | int offset; | |
1465 | ||
1466 | find_pc_partial_function (SYMBOL_VALUE_ADDRESS (msym), &name, | |
1467 | &begin, &end); | |
1468 | ||
81092a3e | 1469 | if (name == NULL || begin == 0 || end == 0) |
77d18ded RC |
1470 | continue; |
1471 | ||
1472 | if (target_read_memory (end - sizeof (insns), (char *)insns, sizeof (insns)) == 0) | |
c268433a | 1473 | { |
77d18ded RC |
1474 | for (offset = 0; offset < ARRAY_SIZE (insns); offset++) |
1475 | { | |
1476 | unsigned int insn; | |
1477 | ||
1478 | insn = extract_unsigned_integer (&insns[offset], 4); | |
1479 | if (insn == 0xe840d002) /* bve,n (rp) */ | |
1480 | { | |
1481 | addr = (end - sizeof (insns)) + (offset * 4); | |
1482 | goto found_pattern; | |
1483 | } | |
1484 | } | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | /* Can't find a suitable sequence. */ | |
1489 | return 0; | |
1490 | ||
1491 | found_pattern: | |
1492 | priv->dummy_call_sequence_addr = addr; | |
1493 | /* Right now we only look for a "bve,l (rp)" sequence, so the register is | |
1494 | always HPPA_RP_REGNUM. */ | |
1495 | priv->dummy_call_sequence_reg = HPPA_RP_REGNUM; | |
1496 | ||
1497 | *argreg = priv->dummy_call_sequence_reg; | |
1498 | return priv->dummy_call_sequence_addr; | |
1499 | } | |
1500 | ||
1501 | static CORE_ADDR | |
1502 | hppa_hpux_find_import_stub_for_addr (CORE_ADDR funcaddr) | |
1503 | { | |
1504 | struct objfile *objfile; | |
1505 | struct minimal_symbol *funsym, *stubsym; | |
1506 | CORE_ADDR stubaddr; | |
1507 | ||
1508 | funsym = lookup_minimal_symbol_by_pc (funcaddr); | |
1509 | stubaddr = 0; | |
1510 | ||
1511 | ALL_OBJFILES (objfile) | |
1512 | { | |
1513 | stubsym = lookup_minimal_symbol_solib_trampoline | |
1514 | (SYMBOL_LINKAGE_NAME (funsym), objfile); | |
1515 | ||
1516 | if (stubsym) | |
1517 | { | |
1518 | struct unwind_table_entry *u; | |
1519 | ||
1520 | u = find_unwind_entry (SYMBOL_VALUE (stubsym)); | |
1521 | if (u == NULL | |
1522 | || (u->stub_unwind.stub_type != IMPORT | |
1523 | && u->stub_unwind.stub_type != IMPORT_SHLIB)) | |
1524 | continue; | |
1525 | ||
1526 | stubaddr = SYMBOL_VALUE (stubsym); | |
1527 | ||
1528 | /* If we found an IMPORT stub, then we can stop searching; | |
1529 | if we found an IMPORT_SHLIB, we want to continue the search | |
1530 | in the hopes that we will find an IMPORT stub. */ | |
1531 | if (u->stub_unwind.stub_type == IMPORT) | |
1532 | break; | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | return stubaddr; | |
1537 | } | |
1538 | ||
1539 | static int | |
1540 | hppa_hpux_sr_for_addr (CORE_ADDR addr) | |
1541 | { | |
1542 | int sr; | |
1543 | /* The space register to use is encoded in the top 2 bits of the address. */ | |
1544 | sr = addr >> (gdbarch_tdep (current_gdbarch)->bytes_per_address * 8 - 2); | |
1545 | return sr + 4; | |
1546 | } | |
1547 | ||
1548 | static CORE_ADDR | |
1549 | hppa_hpux_find_dummy_bpaddr (CORE_ADDR addr) | |
1550 | { | |
1551 | /* In order for us to restore the space register to its starting state, | |
1552 | we need the dummy trampoline to return to the an instruction address in | |
1553 | the same space as where we started the call. We used to place the | |
1554 | breakpoint near the current pc, however, this breaks nested dummy calls | |
1555 | as the nested call will hit the breakpoint address and terminate | |
1556 | prematurely. Instead, we try to look for an address in the same space to | |
1557 | put the breakpoint. | |
1558 | ||
1559 | This is similar in spirit to putting the breakpoint at the "entry point" | |
1560 | of an executable. */ | |
1561 | ||
1562 | struct obj_section *sec; | |
1563 | struct unwind_table_entry *u; | |
1564 | struct minimal_symbol *msym; | |
1565 | CORE_ADDR func; | |
1566 | int i; | |
1567 | ||
1568 | sec = find_pc_section (addr); | |
1569 | if (sec) | |
1570 | { | |
1571 | /* First try the lowest address in the section; we can use it as long | |
1572 | as it is "regular" code (i.e. not a stub) */ | |
1573 | u = find_unwind_entry (sec->addr); | |
1574 | if (!u || u->stub_unwind.stub_type == 0) | |
1575 | return sec->addr; | |
1576 | ||
1577 | /* Otherwise, we need to find a symbol for a regular function. We | |
1578 | do this by walking the list of msymbols in the objfile. The symbol | |
1579 | we find should not be the same as the function that was passed in. */ | |
1580 | ||
1581 | /* FIXME: this is broken, because we can find a function that will be | |
1582 | called by the dummy call target function, which will still not | |
1583 | work. */ | |
1584 | ||
1585 | find_pc_partial_function (addr, NULL, &func, NULL); | |
1586 | for (i = 0, msym = sec->objfile->msymbols; | |
1587 | i < sec->objfile->minimal_symbol_count; | |
1588 | i++, msym++) | |
1589 | { | |
1590 | u = find_unwind_entry (SYMBOL_VALUE_ADDRESS (msym)); | |
1591 | if (func != SYMBOL_VALUE_ADDRESS (msym) | |
1592 | && (!u || u->stub_unwind.stub_type == 0)) | |
1593 | return SYMBOL_VALUE_ADDRESS (msym); | |
c268433a | 1594 | } |
77d18ded | 1595 | } |
c268433a | 1596 | |
77d18ded RC |
1597 | warning ("Cannot find suitable address to place dummy breakpoint; nested " |
1598 | "calls may fail.\n"); | |
1599 | return addr - 4; | |
1600 | } | |
1601 | ||
1602 | static CORE_ADDR | |
1603 | hppa_hpux_push_dummy_code (struct gdbarch *gdbarch, CORE_ADDR sp, | |
1604 | CORE_ADDR funcaddr, int using_gcc, | |
1605 | struct value **args, int nargs, | |
1606 | struct type *value_type, | |
1607 | CORE_ADDR *real_pc, CORE_ADDR *bp_addr) | |
1608 | { | |
1609 | CORE_ADDR pc, stubaddr; | |
1610 | int argreg; | |
1611 | ||
1612 | pc = read_pc (); | |
1613 | ||
1614 | /* Note: we don't want to pass a function descriptor here; push_dummy_call | |
1615 | fills in the PIC register for us. */ | |
1616 | funcaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funcaddr, NULL); | |
1617 | ||
1618 | /* The simple case is where we call a function in the same space that we are | |
1619 | currently in; in that case we don't really need to do anything. */ | |
1620 | if (hppa_hpux_sr_for_addr (pc) == hppa_hpux_sr_for_addr (funcaddr)) | |
1621 | { | |
1622 | /* Intraspace call. */ | |
1623 | *bp_addr = hppa_hpux_find_dummy_bpaddr (pc); | |
1624 | *real_pc = funcaddr; | |
1625 | regcache_cooked_write_unsigned (current_regcache, HPPA_RP_REGNUM, *bp_addr); | |
1626 | ||
1627 | return sp; | |
1628 | } | |
1629 | ||
1630 | /* In order to make an interspace call, we need to go through a stub. | |
1631 | gcc supplies an appropriate stub called "__gcc_plt_call", however, if | |
1632 | an application is compiled with HP compilers then this stub is not | |
1633 | available. We used to fallback to "__d_plt_call", however that stub | |
1634 | is not entirely useful for us because it doesn't do an interspace | |
1635 | return back to the caller. Also, on hppa64-hpux, there is no | |
1636 | __gcc_plt_call available. In order to keep the code uniform, we | |
1637 | instead don't use either of these stubs, but instead write our own | |
1638 | onto the stack. | |
1639 | ||
1640 | A problem arises since the stack is located in a different space than | |
1641 | code, so in order to branch to a stack stub, we will need to do an | |
1642 | interspace branch. Previous versions of gdb did this by modifying code | |
1643 | at the current pc and doing single-stepping to set the pcsq. Since this | |
1644 | is highly undesirable, we use a different scheme: | |
1645 | ||
1646 | All we really need to do the branch to the stub is a short instruction | |
1647 | sequence like this: | |
1648 | ||
1649 | PA1.1: | |
1650 | ldsid (rX),r1 | |
1651 | mtsp r1,sr0 | |
1652 | be,n (sr0,rX) | |
1653 | ||
1654 | PA2.0: | |
1655 | bve,n (sr0,rX) | |
1656 | ||
1657 | Instead of writing these sequences ourselves, we can find it in | |
1658 | the instruction stream that belongs to the current space. While this | |
1659 | seems difficult at first, we are actually guaranteed to find the sequences | |
1660 | in several places: | |
1661 | ||
1662 | For 32-bit code: | |
1663 | - in export stubs for shared libraries | |
1664 | - in the "noshlibs" routine in the main module | |
1665 | ||
1666 | For 64-bit code: | |
1667 | - at the end of each "regular" function | |
1668 | ||
1669 | We cache the address of these sequences in the objfile's private data | |
1670 | since these operations can potentially be quite expensive. | |
1671 | ||
1672 | So, what we do is: | |
1673 | - write a stack trampoline | |
1674 | - look for a suitable instruction sequence in the current space | |
1675 | - point the sequence at the trampoline | |
1676 | - set the return address of the trampoline to the current space | |
1677 | (see hppa_hpux_find_dummy_call_bpaddr) | |
1678 | - set the continuing address of the "dummy code" as the sequence. | |
1679 | ||
1680 | */ | |
1681 | ||
1682 | if (IS_32BIT_TARGET (gdbarch)) | |
1683 | { | |
1684 | static unsigned int hppa32_tramp[] = { | |
1685 | 0x0fdf1291, /* stw r31,-8(,sp) */ | |
1686 | 0x02c010a1, /* ldsid (,r22),r1 */ | |
1687 | 0x00011820, /* mtsp r1,sr0 */ | |
1688 | 0xe6c00000, /* be,l 0(sr0,r22),%sr0,%r31 */ | |
1689 | 0x081f0242, /* copy r31,rp */ | |
1690 | 0x0fd11082, /* ldw -8(,sp),rp */ | |
1691 | 0x004010a1, /* ldsid (,rp),r1 */ | |
1692 | 0x00011820, /* mtsp r1,sr0 */ | |
1693 | 0xe0400000, /* be 0(sr0,rp) */ | |
1694 | 0x08000240 /* nop */ | |
1695 | }; | |
1696 | ||
1697 | /* for hppa32, we must call the function through a stub so that on | |
1698 | return it can return to the space of our trampoline. */ | |
1699 | stubaddr = hppa_hpux_find_import_stub_for_addr (funcaddr); | |
1700 | if (stubaddr == 0) | |
1701 | error ("Cannot call external function not referenced by application " | |
1702 | "(no import stub).\n"); | |
1703 | regcache_cooked_write_unsigned (current_regcache, 22, stubaddr); | |
1704 | ||
1705 | write_memory (sp, (char *)&hppa32_tramp, sizeof (hppa32_tramp)); | |
1706 | ||
1707 | *bp_addr = hppa_hpux_find_dummy_bpaddr (pc); | |
c268433a RC |
1708 | regcache_cooked_write_unsigned (current_regcache, 31, *bp_addr); |
1709 | ||
77d18ded RC |
1710 | *real_pc = hppa32_hpux_search_dummy_call_sequence (gdbarch, pc, &argreg); |
1711 | if (*real_pc == 0) | |
1712 | error ("Cannot make interspace call from here.\n"); | |
1713 | ||
1714 | regcache_cooked_write_unsigned (current_regcache, argreg, sp); | |
1715 | ||
1716 | sp += sizeof (hppa32_tramp); | |
c268433a RC |
1717 | } |
1718 | else | |
1719 | { | |
77d18ded RC |
1720 | static unsigned int hppa64_tramp[] = { |
1721 | 0xeac0f000, /* bve,l (r22),%r2 */ | |
1722 | 0x0fdf12d1, /* std r31,-8(,sp) */ | |
1723 | 0x0fd110c2, /* ldd -8(,sp),rp */ | |
1724 | 0xe840d002, /* bve,n (rp) */ | |
1725 | 0x08000240 /* nop */ | |
1726 | }; | |
1727 | ||
1728 | /* for hppa64, we don't need to call through a stub; all functions | |
1729 | return via a bve. */ | |
1730 | regcache_cooked_write_unsigned (current_regcache, 22, funcaddr); | |
1731 | write_memory (sp, (char *)&hppa64_tramp, sizeof (hppa64_tramp)); | |
1732 | ||
1733 | *bp_addr = pc - 4; | |
1734 | regcache_cooked_write_unsigned (current_regcache, 31, *bp_addr); | |
c268433a | 1735 | |
77d18ded RC |
1736 | *real_pc = hppa64_hpux_search_dummy_call_sequence (gdbarch, pc, &argreg); |
1737 | if (*real_pc == 0) | |
1738 | error ("Cannot make interspace call from here.\n"); | |
c268433a | 1739 | |
77d18ded | 1740 | regcache_cooked_write_unsigned (current_regcache, argreg, sp); |
c268433a | 1741 | |
77d18ded | 1742 | sp += sizeof (hppa64_tramp); |
c268433a RC |
1743 | } |
1744 | ||
77d18ded | 1745 | sp = gdbarch_frame_align (gdbarch, sp); |
c268433a RC |
1746 | |
1747 | return sp; | |
1748 | } | |
77d18ded | 1749 | |
cc72850f MK |
1750 | \f |
1751 | ||
08d53055 MK |
1752 | /* Bit in the `ss_flag' member of `struct save_state' that indicates |
1753 | that the 64-bit register values are live. From | |
1754 | <machine/save_state.h>. */ | |
1755 | #define HPPA_HPUX_SS_WIDEREGS 0x40 | |
1756 | ||
1757 | /* Offsets of various parts of `struct save_state'. From | |
1758 | <machine/save_state.h>. */ | |
1759 | #define HPPA_HPUX_SS_FLAGS_OFFSET 0 | |
1760 | #define HPPA_HPUX_SS_NARROW_OFFSET 4 | |
1761 | #define HPPA_HPUX_SS_FPBLOCK_OFFSET 256 | |
1762 | #define HPPA_HPUX_SS_WIDE_OFFSET 640 | |
1763 | ||
1764 | /* The size of `struct save_state. */ | |
1765 | #define HPPA_HPUX_SAVE_STATE_SIZE 1152 | |
1766 | ||
1767 | /* The size of `struct pa89_save_state', which corresponds to PA-RISC | |
1768 | 1.1, the lowest common denominator that we support. */ | |
1769 | #define HPPA_HPUX_PA89_SAVE_STATE_SIZE 512 | |
1770 | ||
1771 | static void | |
1772 | hppa_hpux_supply_ss_narrow (struct regcache *regcache, | |
1773 | int regnum, const char *save_state) | |
1774 | { | |
1775 | const char *ss_narrow = save_state + HPPA_HPUX_SS_NARROW_OFFSET; | |
1776 | int i, offset = 0; | |
1777 | ||
1778 | for (i = HPPA_R1_REGNUM; i < HPPA_FP0_REGNUM; i++) | |
1779 | { | |
1780 | if (regnum == i || regnum == -1) | |
1781 | regcache_raw_supply (regcache, i, ss_narrow + offset); | |
1782 | ||
1783 | offset += 4; | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | static void | |
1788 | hppa_hpux_supply_ss_fpblock (struct regcache *regcache, | |
1789 | int regnum, const char *save_state) | |
1790 | { | |
1791 | const char *ss_fpblock = save_state + HPPA_HPUX_SS_FPBLOCK_OFFSET; | |
1792 | int i, offset = 0; | |
1793 | ||
1794 | /* FIXME: We view the floating-point state as 64 single-precision | |
1795 | registers for 32-bit code, and 32 double-precision register for | |
1796 | 64-bit code. This distinction is artificial and should be | |
1797 | eliminated. If that ever happens, we should remove the if-clause | |
1798 | below. */ | |
1799 | ||
1800 | if (register_size (get_regcache_arch (regcache), HPPA_FP0_REGNUM) == 4) | |
1801 | { | |
1802 | for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 64; i++) | |
1803 | { | |
1804 | if (regnum == i || regnum == -1) | |
1805 | regcache_raw_supply (regcache, i, ss_fpblock + offset); | |
1806 | ||
1807 | offset += 4; | |
1808 | } | |
1809 | } | |
1810 | else | |
1811 | { | |
1812 | for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32; i++) | |
1813 | { | |
1814 | if (regnum == i || regnum == -1) | |
1815 | regcache_raw_supply (regcache, i, ss_fpblock + offset); | |
1816 | ||
1817 | offset += 8; | |
1818 | } | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | static void | |
1823 | hppa_hpux_supply_ss_wide (struct regcache *regcache, | |
1824 | int regnum, const char *save_state) | |
1825 | { | |
1826 | const char *ss_wide = save_state + HPPA_HPUX_SS_WIDE_OFFSET; | |
1827 | int i, offset = 8; | |
1828 | ||
1829 | if (register_size (get_regcache_arch (regcache), HPPA_R1_REGNUM) == 4) | |
1830 | offset += 4; | |
1831 | ||
1832 | for (i = HPPA_R1_REGNUM; i < HPPA_FP0_REGNUM; i++) | |
1833 | { | |
1834 | if (regnum == i || regnum == -1) | |
1835 | regcache_raw_supply (regcache, i, ss_wide + offset); | |
1836 | ||
1837 | offset += 8; | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | static void | |
1842 | hppa_hpux_supply_save_state (const struct regset *regset, | |
1843 | struct regcache *regcache, | |
1844 | int regnum, const void *regs, size_t len) | |
1845 | { | |
1846 | const char *proc_info = regs; | |
1847 | const char *save_state = proc_info + 8; | |
1848 | ULONGEST flags; | |
1849 | ||
1850 | flags = extract_unsigned_integer (save_state + HPPA_HPUX_SS_FLAGS_OFFSET, 4); | |
1851 | if (regnum == -1 || regnum == HPPA_FLAGS_REGNUM) | |
1852 | { | |
1853 | struct gdbarch *arch = get_regcache_arch (regcache); | |
1854 | size_t size = register_size (arch, HPPA_FLAGS_REGNUM); | |
1855 | char buf[8]; | |
1856 | ||
1857 | store_unsigned_integer (buf, size, flags); | |
1858 | regcache_raw_supply (regcache, HPPA_FLAGS_REGNUM, buf); | |
1859 | } | |
1860 | ||
1861 | /* If the SS_WIDEREGS flag is set, we really do need the full | |
1862 | `struct save_state'. */ | |
1863 | if (flags & HPPA_HPUX_SS_WIDEREGS && len < HPPA_HPUX_SAVE_STATE_SIZE) | |
1864 | error ("Register set contents too small"); | |
1865 | ||
1866 | if (flags & HPPA_HPUX_SS_WIDEREGS) | |
1867 | hppa_hpux_supply_ss_wide (regcache, regnum, save_state); | |
1868 | else | |
1869 | hppa_hpux_supply_ss_narrow (regcache, regnum, save_state); | |
1870 | ||
1871 | hppa_hpux_supply_ss_fpblock (regcache, regnum, save_state); | |
1872 | } | |
1873 | ||
1874 | /* HP-UX register set. */ | |
1875 | ||
1876 | static struct regset hppa_hpux_regset = | |
1877 | { | |
1878 | NULL, | |
1879 | hppa_hpux_supply_save_state | |
1880 | }; | |
1881 | ||
1882 | static const struct regset * | |
1883 | hppa_hpux_regset_from_core_section (struct gdbarch *gdbarch, | |
1884 | const char *sect_name, size_t sect_size) | |
1885 | { | |
1886 | if (strcmp (sect_name, ".reg") == 0 | |
1887 | && sect_size >= HPPA_HPUX_PA89_SAVE_STATE_SIZE + 8) | |
1888 | return &hppa_hpux_regset; | |
1889 | ||
1890 | return NULL; | |
1891 | } | |
1892 | \f | |
1893 | ||
cc72850f MK |
1894 | /* Bit in the `ss_flag' member of `struct save_state' that indicates |
1895 | the state was saved from a system call. From | |
1896 | <machine/save_state.h>. */ | |
1897 | #define HPPA_HPUX_SS_INSYSCALL 0x02 | |
1898 | ||
1899 | static CORE_ADDR | |
1900 | hppa_hpux_read_pc (ptid_t ptid) | |
1901 | { | |
1902 | ULONGEST flags; | |
1903 | ||
1904 | /* If we're currently in a system call return the contents of %r31. */ | |
1905 | flags = read_register_pid (HPPA_FLAGS_REGNUM, ptid); | |
1906 | if (flags & HPPA_HPUX_SS_INSYSCALL) | |
1907 | return read_register_pid (HPPA_R31_REGNUM, ptid) & ~0x3; | |
1908 | ||
1909 | return hppa_read_pc (ptid); | |
1910 | } | |
1911 | ||
1912 | static void | |
1913 | hppa_hpux_write_pc (CORE_ADDR pc, ptid_t ptid) | |
1914 | { | |
1915 | ULONGEST flags; | |
1916 | ||
1917 | /* If we're currently in a system call also write PC into %r31. */ | |
1918 | flags = read_register_pid (HPPA_FLAGS_REGNUM, ptid); | |
1919 | if (flags & HPPA_HPUX_SS_INSYSCALL) | |
1920 | write_register_pid (HPPA_R31_REGNUM, pc | 0x3, ptid); | |
1921 | ||
1922 | return hppa_write_pc (pc, ptid); | |
1923 | } | |
1924 | ||
1925 | static CORE_ADDR | |
1926 | hppa_hpux_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
1927 | { | |
1928 | ULONGEST flags; | |
1929 | ||
1930 | /* If we're currently in a system call return the contents of %r31. */ | |
1931 | flags = frame_unwind_register_unsigned (next_frame, HPPA_FLAGS_REGNUM); | |
1932 | if (flags & HPPA_HPUX_SS_INSYSCALL) | |
1933 | return frame_unwind_register_unsigned (next_frame, HPPA_R31_REGNUM) & ~0x3; | |
1934 | ||
1935 | return hppa_unwind_pc (gdbarch, next_frame); | |
1936 | } | |
1937 | \f | |
c268433a | 1938 | |
90f943f1 RC |
1939 | static void |
1940 | hppa_hpux_inferior_created (struct target_ops *objfile, int from_tty) | |
1941 | { | |
1942 | /* Some HP-UX related globals to clear when a new "main" | |
1943 | symbol file is loaded. HP-specific. */ | |
1944 | deprecated_hp_som_som_object_present = 0; | |
1945 | hp_cxx_exception_support_initialized = 0; | |
1946 | } | |
1947 | ||
f77a2124 RC |
1948 | /* Given the current value of the pc, check to see if it is inside a stub, and |
1949 | if so, change the value of the pc to point to the caller of the stub. | |
1950 | NEXT_FRAME is the next frame in the current list of frames. | |
1951 | BASE contains to stack frame base of the current frame. | |
1952 | SAVE_REGS is the register file stored in the frame cache. */ | |
1953 | static void | |
1954 | hppa_hpux_unwind_adjust_stub (struct frame_info *next_frame, CORE_ADDR base, | |
1955 | struct trad_frame_saved_reg *saved_regs) | |
1956 | { | |
1957 | int optimized, realreg; | |
1958 | enum lval_type lval; | |
1959 | CORE_ADDR addr; | |
1960 | char buffer[sizeof(ULONGEST)]; | |
1961 | ULONGEST val; | |
1962 | CORE_ADDR stubpc; | |
1963 | struct unwind_table_entry *u; | |
1964 | ||
1965 | trad_frame_get_prev_register (next_frame, saved_regs, | |
1966 | HPPA_PCOQ_HEAD_REGNUM, | |
1967 | &optimized, &lval, &addr, &realreg, buffer); | |
1968 | val = extract_unsigned_integer (buffer, | |
1969 | register_size (get_frame_arch (next_frame), | |
1970 | HPPA_PCOQ_HEAD_REGNUM)); | |
1971 | ||
1972 | u = find_unwind_entry (val); | |
1973 | if (u && u->stub_unwind.stub_type == EXPORT) | |
1974 | { | |
1975 | stubpc = read_memory_integer (base - 24, TARGET_PTR_BIT / 8); | |
1976 | trad_frame_set_value (saved_regs, HPPA_PCOQ_HEAD_REGNUM, stubpc); | |
1977 | } | |
1978 | else if (hppa_symbol_address ("__gcc_plt_call") | |
1979 | == get_pc_function_start (val)) | |
1980 | { | |
1981 | stubpc = read_memory_integer (base - 8, TARGET_PTR_BIT / 8); | |
1982 | trad_frame_set_value (saved_regs, HPPA_PCOQ_HEAD_REGNUM, stubpc); | |
1983 | } | |
1984 | } | |
1985 | ||
7d773d96 JB |
1986 | static void |
1987 | hppa_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
1988 | { | |
abc485a1 RC |
1989 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1990 | ||
77d18ded | 1991 | if (IS_32BIT_TARGET (gdbarch)) |
84674fe1 | 1992 | tdep->in_solib_call_trampoline = hppa32_hpux_in_solib_call_trampoline; |
abc485a1 | 1993 | else |
84674fe1 | 1994 | tdep->in_solib_call_trampoline = hppa64_hpux_in_solib_call_trampoline; |
abc485a1 | 1995 | |
f77a2124 RC |
1996 | tdep->unwind_adjust_stub = hppa_hpux_unwind_adjust_stub; |
1997 | ||
3cd36e7c MK |
1998 | set_gdbarch_in_solib_return_trampoline |
1999 | (gdbarch, hppa_hpux_in_solib_return_trampoline); | |
abc485a1 | 2000 | set_gdbarch_skip_trampoline_code (gdbarch, hppa_hpux_skip_trampoline_code); |
43613416 | 2001 | |
c268433a RC |
2002 | set_gdbarch_push_dummy_code (gdbarch, hppa_hpux_push_dummy_code); |
2003 | set_gdbarch_call_dummy_location (gdbarch, ON_STACK); | |
2004 | ||
cc72850f MK |
2005 | set_gdbarch_read_pc (gdbarch, hppa_hpux_read_pc); |
2006 | set_gdbarch_write_pc (gdbarch, hppa_hpux_write_pc); | |
2007 | set_gdbarch_unwind_pc (gdbarch, hppa_hpux_unwind_pc); | |
2008 | ||
08d53055 MK |
2009 | set_gdbarch_regset_from_core_section |
2010 | (gdbarch, hppa_hpux_regset_from_core_section); | |
2011 | ||
43613416 | 2012 | frame_unwind_append_sniffer (gdbarch, hppa_hpux_sigtramp_unwind_sniffer); |
90f943f1 RC |
2013 | |
2014 | observer_attach_inferior_created (hppa_hpux_inferior_created); | |
7d773d96 | 2015 | } |
60e1ff27 | 2016 | |
273f8429 JB |
2017 | static void |
2018 | hppa_hpux_som_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
2019 | { | |
fdd72f95 RC |
2020 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2021 | ||
2022 | tdep->is_elf = 0; | |
c268433a | 2023 | |
77d18ded RC |
2024 | tdep->find_global_pointer = hppa32_hpux_find_global_pointer; |
2025 | ||
7d773d96 | 2026 | hppa_hpux_init_abi (info, gdbarch); |
acf86d54 | 2027 | som_solib_select (tdep); |
273f8429 JB |
2028 | } |
2029 | ||
2030 | static void | |
2031 | hppa_hpux_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
2032 | { | |
fdd72f95 RC |
2033 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2034 | ||
2035 | tdep->is_elf = 1; | |
77d18ded RC |
2036 | tdep->find_global_pointer = hppa64_hpux_find_global_pointer; |
2037 | ||
7d773d96 | 2038 | hppa_hpux_init_abi (info, gdbarch); |
acf86d54 | 2039 | pa64_solib_select (tdep); |
273f8429 JB |
2040 | } |
2041 | ||
08d53055 MK |
2042 | static enum gdb_osabi |
2043 | hppa_hpux_core_osabi_sniffer (bfd *abfd) | |
2044 | { | |
2045 | if (strcmp (bfd_get_target (abfd), "hpux-core") == 0) | |
2046 | return GDB_OSABI_HPUX_SOM; | |
2047 | ||
2048 | return GDB_OSABI_UNKNOWN; | |
2049 | } | |
2050 | ||
273f8429 JB |
2051 | void |
2052 | _initialize_hppa_hpux_tdep (void) | |
2053 | { | |
08d53055 MK |
2054 | /* BFD doesn't set a flavour for HP-UX style core files. It doesn't |
2055 | set the architecture either. */ | |
2056 | gdbarch_register_osabi_sniffer (bfd_arch_unknown, | |
2057 | bfd_target_unknown_flavour, | |
2058 | hppa_hpux_core_osabi_sniffer); | |
2059 | ||
05816f70 | 2060 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_SOM, |
273f8429 | 2061 | hppa_hpux_som_init_abi); |
51db5742 | 2062 | gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w, GDB_OSABI_HPUX_ELF, |
273f8429 JB |
2063 | hppa_hpux_elf_init_abi); |
2064 | } |