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ef6f3a8b | 1 | /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. |
0c4b30ea | 2 | Copyright 1986, 1987, 1989, 1991, 1992, 1994 Free Software Foundation, Inc. |
ef6f3a8b RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "inferior.h" | |
22 | #include "target.h" | |
d87d7b10 SG |
23 | #include "gdbcore.h" |
24 | #include "xcoffsolib.h" | |
25 | #include "symfile.h" | |
26 | #include "objfiles.h" | |
886955e7 | 27 | #include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ |
d87d7b10 | 28 | #include "bfd.h" |
e2adc41a | 29 | #include "gdb-stabs.h" |
ef6f3a8b RP |
30 | |
31 | #include <sys/ptrace.h> | |
32 | #include <sys/reg.h> | |
33 | ||
34 | #include <sys/param.h> | |
35 | #include <sys/dir.h> | |
36 | #include <sys/user.h> | |
37 | #include <signal.h> | |
38 | #include <sys/ioctl.h> | |
39 | #include <fcntl.h> | |
40 | ||
41 | #include <a.out.h> | |
42 | #include <sys/file.h> | |
2b576293 | 43 | #include "gdb_stat.h" |
ef6f3a8b | 44 | #include <sys/core.h> |
d87d7b10 | 45 | #include <sys/ldr.h> |
ef6f3a8b RP |
46 | |
47 | extern int errno; | |
0c4b30ea | 48 | |
d87d7b10 SG |
49 | extern struct vmap * map_vmap PARAMS ((bfd *bf, bfd *arch)); |
50 | ||
51 | extern struct target_ops exec_ops; | |
ef6f3a8b RP |
52 | |
53 | static void | |
54 | exec_one_dummy_insn PARAMS ((void)); | |
55 | ||
d87d7b10 SG |
56 | extern void |
57 | add_text_to_loadinfo PARAMS ((CORE_ADDR textaddr, CORE_ADDR dataaddr)); | |
58 | ||
0c4b30ea SS |
59 | extern void |
60 | fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta)); | |
61 | ||
ef6f3a8b RP |
62 | /* Conversion from gdb-to-system special purpose register numbers.. */ |
63 | ||
64 | static int special_regs[] = { | |
65 | IAR, /* PC_REGNUM */ | |
66 | MSR, /* PS_REGNUM */ | |
67 | CR, /* CR_REGNUM */ | |
68 | LR, /* LR_REGNUM */ | |
69 | CTR, /* CTR_REGNUM */ | |
70 | XER, /* XER_REGNUM */ | |
71 | MQ /* MQ_REGNUM */ | |
72 | }; | |
73 | ||
74 | void | |
75 | fetch_inferior_registers (regno) | |
76 | int regno; | |
77 | { | |
78 | int ii; | |
79 | extern char registers[]; | |
80 | ||
81 | if (regno < 0) { /* for all registers */ | |
82 | ||
83 | /* read 32 general purpose registers. */ | |
84 | ||
85 | for (ii=0; ii < 32; ++ii) | |
86 | *(int*)®isters[REGISTER_BYTE (ii)] = | |
87 | ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0); | |
88 | ||
89 | /* read general purpose floating point registers. */ | |
90 | ||
91 | for (ii=0; ii < 32; ++ii) | |
92 | ptrace (PT_READ_FPR, inferior_pid, | |
0c4b30ea | 93 | (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (FP0_REGNUM+ii)], |
ef6f3a8b RP |
94 | FPR0+ii, 0); |
95 | ||
96 | /* read special registers. */ | |
97 | for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) | |
98 | *(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)] = | |
99 | ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii], | |
100 | 0, 0); | |
101 | ||
102 | registers_fetched (); | |
103 | return; | |
104 | } | |
105 | ||
106 | /* else an individual register is addressed. */ | |
107 | ||
108 | else if (regno < FP0_REGNUM) { /* a GPR */ | |
109 | *(int*)®isters[REGISTER_BYTE (regno)] = | |
110 | ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0, 0); | |
111 | } | |
112 | else if (regno <= FPLAST_REGNUM) { /* a FPR */ | |
113 | ptrace (PT_READ_FPR, inferior_pid, | |
0c4b30ea | 114 | (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (regno)], |
ef6f3a8b RP |
115 | (regno-FP0_REGNUM+FPR0), 0); |
116 | } | |
117 | else if (regno <= LAST_SP_REGNUM) { /* a special register */ | |
118 | *(int*)®isters[REGISTER_BYTE (regno)] = | |
119 | ptrace (PT_READ_GPR, inferior_pid, | |
120 | (PTRACE_ARG3_TYPE) special_regs[regno-FIRST_SP_REGNUM], 0, 0); | |
121 | } | |
122 | else | |
199b2450 | 123 | fprintf_unfiltered (gdb_stderr, "gdb error: register no %d not implemented.\n", regno); |
ef6f3a8b RP |
124 | |
125 | register_valid [regno] = 1; | |
126 | } | |
127 | ||
128 | /* Store our register values back into the inferior. | |
129 | If REGNO is -1, do this for all registers. | |
130 | Otherwise, REGNO specifies which register (so we can save time). */ | |
131 | ||
132 | void | |
133 | store_inferior_registers (regno) | |
134 | int regno; | |
135 | { | |
136 | extern char registers[]; | |
137 | ||
138 | errno = 0; | |
139 | ||
0c4b30ea SS |
140 | if (regno == -1) |
141 | { /* for all registers.. */ | |
ef6f3a8b RP |
142 | int ii; |
143 | ||
144 | /* execute one dummy instruction (which is a breakpoint) in inferior | |
145 | process. So give kernel a chance to do internal house keeping. | |
146 | Otherwise the following ptrace(2) calls will mess up user stack | |
147 | since kernel will get confused about the bottom of the stack (%sp) */ | |
148 | ||
149 | exec_one_dummy_insn (); | |
150 | ||
151 | /* write general purpose registers first! */ | |
0c4b30ea SS |
152 | for ( ii=GPR0; ii<=GPR31; ++ii) |
153 | { | |
154 | ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, | |
155 | *(int*)®isters[REGISTER_BYTE (ii)], 0); | |
156 | if (errno) | |
157 | { | |
158 | perror ("ptrace write_gpr"); | |
159 | errno = 0; | |
160 | } | |
ef6f3a8b | 161 | } |
ef6f3a8b RP |
162 | |
163 | /* write floating point registers now. */ | |
0c4b30ea SS |
164 | for ( ii=0; ii < 32; ++ii) |
165 | { | |
166 | ptrace (PT_WRITE_FPR, inferior_pid, | |
ef6f3a8b | 167 | (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (FP0_REGNUM+ii)], |
0c4b30ea SS |
168 | FPR0+ii, 0); |
169 | if (errno) | |
170 | { | |
171 | perror ("ptrace write_fpr"); | |
172 | errno = 0; | |
173 | } | |
174 | } | |
ef6f3a8b RP |
175 | |
176 | /* write special registers. */ | |
0c4b30ea SS |
177 | for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) |
178 | { | |
179 | ptrace (PT_WRITE_GPR, inferior_pid, | |
180 | (PTRACE_ARG3_TYPE) special_regs[ii], | |
181 | *(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)], 0); | |
182 | if (errno) | |
183 | { | |
184 | perror ("ptrace write_gpr"); | |
185 | errno = 0; | |
186 | } | |
ef6f3a8b | 187 | } |
0c4b30ea | 188 | } |
ef6f3a8b RP |
189 | |
190 | /* else, a specific register number is given... */ | |
191 | ||
0c4b30ea SS |
192 | else if (regno < FP0_REGNUM) /* a GPR */ |
193 | { | |
194 | ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, | |
195 | *(int*)®isters[REGISTER_BYTE (regno)], 0); | |
196 | } | |
ef6f3a8b | 197 | |
0c4b30ea SS |
198 | else if (regno <= FPLAST_REGNUM) /* a FPR */ |
199 | { | |
200 | ptrace (PT_WRITE_FPR, inferior_pid, | |
201 | (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (regno)], | |
202 | regno - FP0_REGNUM + FPR0, 0); | |
203 | } | |
ef6f3a8b | 204 | |
0c4b30ea SS |
205 | else if (regno <= LAST_SP_REGNUM) /* a special register */ |
206 | { | |
207 | ptrace (PT_WRITE_GPR, inferior_pid, | |
208 | (PTRACE_ARG3_TYPE) special_regs [regno-FIRST_SP_REGNUM], | |
209 | *(int*)®isters[REGISTER_BYTE (regno)], 0); | |
210 | } | |
ef6f3a8b RP |
211 | |
212 | else | |
199b2450 | 213 | fprintf_unfiltered (gdb_stderr, "Gdb error: register no %d not implemented.\n", regno); |
ef6f3a8b | 214 | |
0c4b30ea SS |
215 | if (errno) |
216 | { | |
217 | perror ("ptrace write"); | |
218 | errno = 0; | |
219 | } | |
ef6f3a8b RP |
220 | } |
221 | ||
222 | /* Execute one dummy breakpoint instruction. This way we give the kernel | |
223 | a chance to do some housekeeping and update inferior's internal data, | |
224 | including u_area. */ | |
0c4b30ea | 225 | |
ef6f3a8b RP |
226 | static void |
227 | exec_one_dummy_insn () | |
228 | { | |
229 | #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200 | |
230 | ||
0c4b30ea | 231 | char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ |
ef6f3a8b RP |
232 | unsigned int status, pid; |
233 | ||
234 | /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We assume that | |
235 | this address will never be executed again by the real code. */ | |
236 | ||
0c4b30ea | 237 | target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents); |
ef6f3a8b RP |
238 | |
239 | errno = 0; | |
240 | ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) DUMMY_INSN_ADDR, 0, 0); | |
241 | if (errno) | |
242 | perror ("pt_continue"); | |
243 | ||
244 | do { | |
245 | pid = wait (&status); | |
246 | } while (pid != inferior_pid); | |
247 | ||
0c4b30ea | 248 | target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents); |
ef6f3a8b RP |
249 | } |
250 | ||
251 | void | |
252 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) | |
253 | char *core_reg_sect; | |
254 | unsigned core_reg_size; | |
255 | int which; | |
256 | unsigned int reg_addr; /* Unused in this version */ | |
257 | { | |
258 | /* fetch GPRs and special registers from the first register section | |
259 | in core bfd. */ | |
0c4b30ea SS |
260 | if (which == 0) |
261 | { | |
262 | /* copy GPRs first. */ | |
263 | memcpy (registers, core_reg_sect, 32 * 4); | |
264 | ||
265 | /* gdb's internal register template and bfd's register section layout | |
266 | should share a common include file. FIXMEmgo */ | |
267 | /* then comes special registes. They are supposed to be in the same | |
268 | order in gdb template and bfd `.reg' section. */ | |
269 | core_reg_sect += (32 * 4); | |
270 | memcpy (®isters [REGISTER_BYTE (FIRST_SP_REGNUM)], core_reg_sect, | |
271 | (LAST_SP_REGNUM - FIRST_SP_REGNUM + 1) * 4); | |
272 | } | |
ef6f3a8b RP |
273 | |
274 | /* fetch floating point registers from register section 2 in core bfd. */ | |
275 | else if (which == 2) | |
ade40d31 | 276 | memcpy (®isters [REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8); |
ef6f3a8b RP |
277 | |
278 | else | |
199b2450 | 279 | fprintf_unfiltered (gdb_stderr, "Gdb error: unknown parameter to fetch_core_registers().\n"); |
ef6f3a8b | 280 | } |
d87d7b10 | 281 | \f |
0c4b30ea | 282 | /* handle symbol translation on vmapping */ |
d87d7b10 SG |
283 | |
284 | static void | |
285 | vmap_symtab (vp) | |
286 | register struct vmap *vp; | |
287 | { | |
288 | register struct objfile *objfile; | |
d87d7b10 SG |
289 | CORE_ADDR text_delta; |
290 | CORE_ADDR data_delta; | |
291 | CORE_ADDR bss_delta; | |
292 | struct section_offsets *new_offsets; | |
293 | int i; | |
294 | ||
295 | objfile = vp->objfile; | |
296 | if (objfile == NULL) | |
297 | { | |
298 | /* OK, it's not an objfile we opened ourselves. | |
299 | Currently, that can only happen with the exec file, so | |
300 | relocate the symbols for the symfile. */ | |
301 | if (symfile_objfile == NULL) | |
302 | return; | |
303 | objfile = symfile_objfile; | |
304 | } | |
305 | ||
306 | new_offsets = alloca | |
307 | (sizeof (struct section_offsets) | |
308 | + sizeof (new_offsets->offsets) * objfile->num_sections); | |
309 | ||
310 | for (i = 0; i < objfile->num_sections; ++i) | |
311 | ANOFFSET (new_offsets, i) = ANOFFSET (objfile->section_offsets, i); | |
312 | ||
d87d7b10 | 313 | text_delta = |
e2adc41a JK |
314 | vp->tstart - ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
315 | ANOFFSET (new_offsets, SECT_OFF_TEXT) = vp->tstart; | |
d87d7b10 | 316 | |
d87d7b10 | 317 | data_delta = |
e2adc41a JK |
318 | vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_DATA); |
319 | ANOFFSET (new_offsets, SECT_OFF_DATA) = vp->dstart; | |
d87d7b10 | 320 | |
d87d7b10 | 321 | bss_delta = |
e2adc41a JK |
322 | vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_BSS); |
323 | ANOFFSET (new_offsets, SECT_OFF_BSS) = vp->dstart; | |
d87d7b10 SG |
324 | |
325 | objfile_relocate (objfile, new_offsets); | |
d87d7b10 SG |
326 | } |
327 | \f | |
328 | /* Add symbols for an objfile. */ | |
0c4b30ea | 329 | |
d87d7b10 SG |
330 | static int |
331 | objfile_symbol_add (arg) | |
332 | char *arg; | |
333 | { | |
334 | struct objfile *obj = (struct objfile *) arg; | |
0c4b30ea | 335 | |
d87d7b10 SG |
336 | syms_from_objfile (obj, 0, 0, 0); |
337 | new_symfile_objfile (obj, 0, 0); | |
338 | return 1; | |
339 | } | |
340 | ||
341 | /* Add a new vmap entry based on ldinfo() information. | |
342 | ||
343 | If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a | |
344 | core file), the caller should set it to -1, and we will open the file. | |
345 | ||
346 | Return the vmap new entry. */ | |
0c4b30ea | 347 | |
d87d7b10 | 348 | static struct vmap * |
0c4b30ea | 349 | add_vmap (ldi) |
d87d7b10 SG |
350 | register struct ld_info *ldi; |
351 | { | |
0c4b30ea SS |
352 | bfd *abfd, *last; |
353 | register char *mem, *objname; | |
354 | struct objfile *obj; | |
355 | struct vmap *vp; | |
356 | ||
357 | /* This ldi structure was allocated using alloca() in | |
358 | xcoff_relocate_symtab(). Now we need to have persistent object | |
359 | and member names, so we should save them. */ | |
360 | ||
361 | mem = ldi->ldinfo_filename + strlen (ldi->ldinfo_filename) + 1; | |
362 | mem = savestring (mem, strlen (mem)); | |
363 | objname = savestring (ldi->ldinfo_filename, strlen (ldi->ldinfo_filename)); | |
364 | ||
365 | if (ldi->ldinfo_fd < 0) | |
366 | /* Note that this opens it once for every member; a possible | |
367 | enhancement would be to only open it once for every object. */ | |
368 | abfd = bfd_openr (objname, gnutarget); | |
369 | else | |
370 | abfd = bfd_fdopenr (objname, gnutarget, ldi->ldinfo_fd); | |
371 | if (!abfd) | |
372 | error ("Could not open `%s' as an executable file: %s", | |
373 | objname, bfd_errmsg (bfd_get_error ())); | |
374 | ||
375 | /* make sure we have an object file */ | |
376 | ||
377 | if (bfd_check_format (abfd, bfd_object)) | |
378 | vp = map_vmap (abfd, 0); | |
379 | ||
380 | else if (bfd_check_format (abfd, bfd_archive)) | |
381 | { | |
382 | last = 0; | |
383 | /* FIXME??? am I tossing BFDs? bfd? */ | |
384 | while ((last = bfd_openr_next_archived_file (abfd, last))) | |
385 | if (STREQ (mem, last->filename)) | |
386 | break; | |
387 | ||
388 | if (!last) | |
389 | { | |
390 | bfd_close (abfd); | |
391 | /* FIXME -- should be error */ | |
392 | warning ("\"%s\": member \"%s\" missing.", abfd->filename, mem); | |
393 | return; | |
d87d7b10 | 394 | } |
0c4b30ea SS |
395 | |
396 | if (!bfd_check_format(last, bfd_object)) | |
397 | { | |
398 | bfd_close (last); /* XXX??? */ | |
399 | goto obj_err; | |
d87d7b10 | 400 | } |
0c4b30ea SS |
401 | |
402 | vp = map_vmap (last, abfd); | |
403 | } | |
404 | else | |
405 | { | |
406 | obj_err: | |
407 | bfd_close (abfd); | |
408 | error ("\"%s\": not in executable format: %s.", | |
409 | objname, bfd_errmsg (bfd_get_error ())); | |
410 | /*NOTREACHED*/ | |
411 | } | |
412 | obj = allocate_objfile (vp->bfd, 0); | |
413 | vp->objfile = obj; | |
d87d7b10 SG |
414 | |
415 | #ifndef SOLIB_SYMBOLS_MANUAL | |
0c4b30ea SS |
416 | if (catch_errors (objfile_symbol_add, (char *)obj, |
417 | "Error while reading shared library symbols:\n", | |
418 | RETURN_MASK_ALL)) | |
419 | { | |
420 | /* Note this is only done if symbol reading was successful. */ | |
421 | vmap_symtab (vp); | |
422 | vp->loaded = 1; | |
423 | } | |
d87d7b10 | 424 | #endif |
0c4b30ea | 425 | return vp; |
d87d7b10 SG |
426 | } |
427 | \f | |
0c4b30ea SS |
428 | /* update VMAP info with ldinfo() information |
429 | Input is ptr to ldinfo() results. */ | |
d87d7b10 SG |
430 | |
431 | static void | |
0c4b30ea | 432 | vmap_ldinfo (ldi) |
d87d7b10 SG |
433 | register struct ld_info *ldi; |
434 | { | |
435 | struct stat ii, vi; | |
436 | register struct vmap *vp; | |
88a5c3fc | 437 | int got_one, retried; |
88a5c3fc | 438 | int got_exec_file; |
d87d7b10 | 439 | |
0c4b30ea SS |
440 | /* For each *ldi, see if we have a corresponding *vp. |
441 | If so, update the mapping, and symbol table. | |
442 | If not, add an entry and symbol table. */ | |
d87d7b10 | 443 | |
0c4b30ea SS |
444 | do { |
445 | char *name = ldi->ldinfo_filename; | |
446 | char *memb = name + strlen(name) + 1; | |
d87d7b10 | 447 | |
0c4b30ea | 448 | retried = 0; |
d87d7b10 | 449 | |
0c4b30ea SS |
450 | if (fstat (ldi->ldinfo_fd, &ii) < 0) |
451 | fatal ("cannot fstat(fd=%d) on %s", ldi->ldinfo_fd, name); | |
452 | retry: | |
453 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) | |
454 | { | |
0c4b30ea SS |
455 | /* First try to find a `vp', which is the same as in ldinfo. |
456 | If not the same, just continue and grep the next `vp'. If same, | |
457 | relocate its tstart, tend, dstart, dend values. If no such `vp' | |
458 | found, get out of this for loop, add this ldi entry as a new vmap | |
459 | (add_vmap) and come back, fins its `vp' and so on... */ | |
d87d7b10 | 460 | |
0c4b30ea | 461 | /* The filenames are not always sufficient to match on. */ |
d87d7b10 | 462 | |
0c4b30ea SS |
463 | if ((name[0] == '/' && !STREQ(name, vp->name)) |
464 | || (memb[0] && !STREQ(memb, vp->member))) | |
465 | continue; | |
d87d7b10 | 466 | |
0c4b30ea | 467 | /* See if we are referring to the same file. */ |
fb494327 JK |
468 | if (bfd_stat (vp->bfd, &vi) < 0) |
469 | /* An error here is innocuous, most likely meaning that | |
470 | the file descriptor has become worthless. | |
471 | FIXME: What does it mean for a file descriptor to become | |
472 | "worthless"? What makes it happen? What error does it | |
473 | produce (ENOENT? others?)? Should we at least provide | |
474 | a warning? */ | |
523ca9d0 | 475 | continue; |
d87d7b10 | 476 | |
0c4b30ea SS |
477 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) |
478 | continue; | |
d87d7b10 | 479 | |
0c4b30ea SS |
480 | if (!retried) |
481 | close (ldi->ldinfo_fd); | |
d87d7b10 | 482 | |
0c4b30ea | 483 | ++got_one; |
d87d7b10 | 484 | |
fb494327 | 485 | /* Found a corresponding VMAP. Remap! */ |
d87d7b10 | 486 | |
0c4b30ea SS |
487 | /* We can assume pointer == CORE_ADDR, this code is native only. */ |
488 | vp->tstart = (CORE_ADDR) ldi->ldinfo_textorg; | |
489 | vp->tend = vp->tstart + ldi->ldinfo_textsize; | |
490 | vp->dstart = (CORE_ADDR) ldi->ldinfo_dataorg; | |
491 | vp->dend = vp->dstart + ldi->ldinfo_datasize; | |
d87d7b10 | 492 | |
0c4b30ea SS |
493 | if (vp->tadj) |
494 | { | |
d87d7b10 SG |
495 | vp->tstart += vp->tadj; |
496 | vp->tend += vp->tadj; | |
497 | } | |
498 | ||
88a5c3fc JK |
499 | /* The objfile is only NULL for the exec file. */ |
500 | if (vp->objfile == NULL) | |
501 | got_exec_file = 1; | |
502 | ||
0c4b30ea SS |
503 | /* relocate symbol table(s). */ |
504 | vmap_symtab (vp); | |
d87d7b10 | 505 | |
fb494327 | 506 | /* There may be more, so we don't break out of the loop. */ |
0c4b30ea | 507 | } |
d87d7b10 | 508 | |
0c4b30ea SS |
509 | /* if there was no matching *vp, we must perforce create the sucker(s) */ |
510 | if (!got_one && !retried) | |
511 | { | |
512 | add_vmap (ldi); | |
513 | ++retried; | |
514 | goto retry; | |
515 | } | |
d87d7b10 SG |
516 | } while (ldi->ldinfo_next |
517 | && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); | |
518 | ||
8989d4fc JK |
519 | /* If we don't find the symfile_objfile anywhere in the ldinfo, it |
520 | is unlikely that the symbol file is relocated to the proper | |
521 | address. And we might have attached to a process which is | |
522 | running a different copy of the same executable. */ | |
88a5c3fc | 523 | if (symfile_objfile != NULL && !got_exec_file) |
8989d4fc JK |
524 | { |
525 | warning_begin (); | |
526 | fputs_unfiltered ("Symbol file ", gdb_stderr); | |
527 | fputs_unfiltered (symfile_objfile->name, gdb_stderr); | |
528 | fputs_unfiltered ("\nis not mapped; discarding it.\n\ | |
529 | If in fact that file has symbols which the mapped files listed by\n\ | |
530 | \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ | |
531 | \"add-symbol-file\" commands (note that you must take care of relocating\n\ | |
532 | symbols to the proper address).\n", gdb_stderr); | |
533 | free_objfile (symfile_objfile); | |
534 | symfile_objfile = NULL; | |
535 | } | |
e2adc41a | 536 | breakpoint_re_set (); |
d87d7b10 SG |
537 | } |
538 | \f | |
539 | /* As well as symbol tables, exec_sections need relocation. After | |
540 | the inferior process' termination, there will be a relocated symbol | |
541 | table exist with no corresponding inferior process. At that time, we | |
542 | need to use `exec' bfd, rather than the inferior process's memory space | |
543 | to look up symbols. | |
544 | ||
545 | `exec_sections' need to be relocated only once, as long as the exec | |
546 | file remains unchanged. | |
547 | */ | |
548 | ||
549 | static void | |
550 | vmap_exec () | |
551 | { | |
552 | static bfd *execbfd; | |
553 | int i; | |
554 | ||
555 | if (execbfd == exec_bfd) | |
556 | return; | |
557 | ||
558 | execbfd = exec_bfd; | |
559 | ||
560 | if (!vmap || !exec_ops.to_sections) | |
561 | error ("vmap_exec: vmap or exec_ops.to_sections == 0\n"); | |
562 | ||
563 | for (i=0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) | |
564 | { | |
94d4b713 | 565 | if (STREQ(".text", exec_ops.to_sections[i].the_bfd_section->name)) |
d87d7b10 SG |
566 | { |
567 | exec_ops.to_sections[i].addr += vmap->tstart; | |
568 | exec_ops.to_sections[i].endaddr += vmap->tstart; | |
569 | } | |
94d4b713 | 570 | else if (STREQ(".data", exec_ops.to_sections[i].the_bfd_section->name)) |
d87d7b10 SG |
571 | { |
572 | exec_ops.to_sections[i].addr += vmap->dstart; | |
573 | exec_ops.to_sections[i].endaddr += vmap->dstart; | |
574 | } | |
575 | } | |
576 | } | |
577 | \f | |
578 | /* xcoff_relocate_symtab - hook for symbol table relocation. | |
579 | also reads shared libraries.. */ | |
580 | ||
0c4b30ea | 581 | void |
d87d7b10 | 582 | xcoff_relocate_symtab (pid) |
0c4b30ea | 583 | unsigned int pid; |
d87d7b10 SG |
584 | { |
585 | #define MAX_LOAD_SEGS 64 /* maximum number of load segments */ | |
586 | ||
0c4b30ea | 587 | struct ld_info *ldi; |
d87d7b10 | 588 | |
0c4b30ea | 589 | ldi = (void *) alloca(MAX_LOAD_SEGS * sizeof (*ldi)); |
d87d7b10 | 590 | |
0c4b30ea SS |
591 | /* According to my humble theory, AIX has some timing problems and |
592 | when the user stack grows, kernel doesn't update stack info in time | |
593 | and ptrace calls step on user stack. That is why we sleep here a little, | |
594 | and give kernel to update its internals. */ | |
d87d7b10 | 595 | |
0c4b30ea | 596 | usleep (36000); |
d87d7b10 | 597 | |
0c4b30ea SS |
598 | errno = 0; |
599 | ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi, | |
600 | MAX_LOAD_SEGS * sizeof(*ldi), ldi); | |
601 | if (errno) | |
602 | perror_with_name ("ptrace ldinfo"); | |
d87d7b10 | 603 | |
0c4b30ea | 604 | vmap_ldinfo (ldi); |
d87d7b10 | 605 | |
0c4b30ea SS |
606 | do { |
607 | /* We are allowed to assume CORE_ADDR == pointer. This code is | |
608 | native only. */ | |
609 | add_text_to_loadinfo ((CORE_ADDR) ldi->ldinfo_textorg, | |
610 | (CORE_ADDR) ldi->ldinfo_dataorg); | |
611 | } while (ldi->ldinfo_next | |
612 | && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); | |
d87d7b10 SG |
613 | |
614 | #if 0 | |
615 | /* Now that we've jumbled things around, re-sort them. */ | |
616 | sort_minimal_symbols (); | |
617 | #endif | |
618 | ||
619 | /* relocate the exec and core sections as well. */ | |
620 | vmap_exec (); | |
621 | } | |
622 | \f | |
623 | /* Core file stuff. */ | |
624 | ||
625 | /* Relocate symtabs and read in shared library info, based on symbols | |
626 | from the core file. */ | |
0c4b30ea | 627 | |
d87d7b10 | 628 | void |
9137a6f4 PS |
629 | xcoff_relocate_core (target) |
630 | struct target_ops *target; | |
d87d7b10 SG |
631 | { |
632 | /* Offset of member MEMBER in a struct of type TYPE. */ | |
633 | #ifndef offsetof | |
634 | #define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER) | |
635 | #endif | |
636 | ||
637 | /* Size of a struct ld_info except for the variable-length filename. */ | |
638 | #define LDINFO_SIZE (offsetof (struct ld_info, ldinfo_filename)) | |
639 | ||
640 | sec_ptr ldinfo_sec; | |
641 | int offset = 0; | |
642 | struct ld_info *ldip; | |
643 | struct vmap *vp; | |
644 | ||
645 | /* Allocated size of buffer. */ | |
646 | int buffer_size = LDINFO_SIZE; | |
647 | char *buffer = xmalloc (buffer_size); | |
648 | struct cleanup *old = make_cleanup (free_current_contents, &buffer); | |
649 | ||
650 | /* FIXME, this restriction should not exist. For now, though I'll | |
651 | avoid coredumps with error() pending a real fix. */ | |
652 | if (vmap == NULL) | |
653 | error | |
654 | ("Can't debug a core file without an executable file (on the RS/6000)"); | |
655 | ||
656 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); | |
657 | if (ldinfo_sec == NULL) | |
658 | { | |
0c4b30ea | 659 | bfd_err: |
d87d7b10 | 660 | fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n", |
c4a081e1 | 661 | bfd_errmsg (bfd_get_error ())); |
d87d7b10 SG |
662 | do_cleanups (old); |
663 | return; | |
664 | } | |
665 | do | |
666 | { | |
667 | int i; | |
668 | int names_found = 0; | |
669 | ||
670 | /* Read in everything but the name. */ | |
671 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, | |
672 | offset, LDINFO_SIZE) == 0) | |
673 | goto bfd_err; | |
674 | ||
675 | /* Now the name. */ | |
676 | i = LDINFO_SIZE; | |
677 | do | |
678 | { | |
679 | if (i == buffer_size) | |
680 | { | |
681 | buffer_size *= 2; | |
682 | buffer = xrealloc (buffer, buffer_size); | |
683 | } | |
684 | if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i], | |
685 | offset + i, 1) == 0) | |
686 | goto bfd_err; | |
687 | if (buffer[i++] == '\0') | |
688 | ++names_found; | |
689 | } while (names_found < 2); | |
690 | ||
0c4b30ea | 691 | ldip = (struct ld_info *) buffer; |
d87d7b10 SG |
692 | |
693 | /* Can't use a file descriptor from the core file; need to open it. */ | |
694 | ldip->ldinfo_fd = -1; | |
695 | ||
696 | /* The first ldinfo is for the exec file, allocated elsewhere. */ | |
697 | if (offset == 0) | |
698 | vp = vmap; | |
699 | else | |
700 | vp = add_vmap (ldip); | |
701 | ||
702 | offset += ldip->ldinfo_next; | |
703 | ||
704 | /* We can assume pointer == CORE_ADDR, this code is native only. */ | |
705 | vp->tstart = (CORE_ADDR) ldip->ldinfo_textorg; | |
706 | vp->tend = vp->tstart + ldip->ldinfo_textsize; | |
707 | vp->dstart = (CORE_ADDR) ldip->ldinfo_dataorg; | |
708 | vp->dend = vp->dstart + ldip->ldinfo_datasize; | |
709 | ||
523ca9d0 SS |
710 | if (vp->tadj != 0) |
711 | { | |
712 | vp->tstart += vp->tadj; | |
713 | vp->tend += vp->tadj; | |
714 | } | |
d87d7b10 SG |
715 | |
716 | /* Unless this is the exec file, | |
717 | add our sections to the section table for the core target. */ | |
718 | if (vp != vmap) | |
719 | { | |
720 | int count; | |
721 | struct section_table *stp; | |
722 | ||
9137a6f4 | 723 | count = target->to_sections_end - target->to_sections; |
d87d7b10 | 724 | count += 2; |
9137a6f4 PS |
725 | target->to_sections = (struct section_table *) |
726 | xrealloc (target->to_sections, | |
d87d7b10 | 727 | sizeof (struct section_table) * count); |
9137a6f4 PS |
728 | target->to_sections_end = target->to_sections + count; |
729 | stp = target->to_sections_end - 2; | |
d87d7b10 SG |
730 | |
731 | /* "Why do we add bfd_section_vma?", I hear you cry. | |
732 | Well, the start of the section in the file is actually | |
733 | that far into the section as the struct vmap understands it. | |
734 | So for text sections, bfd_section_vma tends to be 0x200, | |
735 | and if vp->tstart is 0xd0002000, then the first byte of | |
736 | the text section on disk corresponds to address 0xd0002200. */ | |
737 | stp->bfd = vp->bfd; | |
94d4b713 JK |
738 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); |
739 | stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tstart; | |
740 | stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tend; | |
d87d7b10 SG |
741 | stp++; |
742 | ||
743 | stp->bfd = vp->bfd; | |
94d4b713 JK |
744 | stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); |
745 | stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dstart; | |
746 | stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dend; | |
d87d7b10 SG |
747 | } |
748 | ||
749 | vmap_symtab (vp); | |
750 | ||
751 | add_text_to_loadinfo ((CORE_ADDR)ldip->ldinfo_textorg, | |
752 | (CORE_ADDR)ldip->ldinfo_dataorg); | |
753 | } while (ldip->ldinfo_next != 0); | |
754 | vmap_exec (); | |
e2adc41a | 755 | breakpoint_re_set (); |
d87d7b10 SG |
756 | do_cleanups (old); |
757 | } |