Commit | Line | Data |
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c906108c SS |
1 | /* Handle SunOS and SVR4 shared libraries for GDB, the GNU Debugger. |
2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 98, 1999 | |
3 | Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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. | |
c906108c | 11 | |
c5aa993b JM |
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. | |
16 | ||
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. */ | |
c906108c SS |
21 | |
22 | ||
23 | #include "defs.h" | |
24 | ||
25 | /* This file is only compilable if link.h is available. */ | |
26 | ||
27 | #ifdef HAVE_LINK_H | |
28 | ||
29 | #include <sys/types.h> | |
30 | #include <signal.h> | |
31 | #include "gdb_string.h" | |
32 | #include <sys/param.h> | |
33 | #include <fcntl.h> | |
c906108c SS |
34 | |
35 | #ifndef SVR4_SHARED_LIBS | |
36 | /* SunOS shared libs need the nlist structure. */ | |
c5aa993b | 37 | #include <a.out.h> |
c906108c SS |
38 | #else |
39 | #include "elf/external.h" | |
40 | #endif | |
41 | ||
42 | #include <link.h> | |
43 | ||
44 | #include "symtab.h" | |
45 | #include "bfd.h" | |
46 | #include "symfile.h" | |
47 | #include "objfiles.h" | |
48 | #include "gdbcore.h" | |
49 | #include "command.h" | |
50 | #include "target.h" | |
51 | #include "frame.h" | |
88987551 | 52 | #include "gdb_regex.h" |
c906108c SS |
53 | #include "inferior.h" |
54 | #include "environ.h" | |
55 | #include "language.h" | |
56 | #include "gdbcmd.h" | |
57 | ||
c5aa993b | 58 | #define MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */ |
c906108c SS |
59 | |
60 | /* On SVR4 systems, a list of symbols in the dynamic linker where | |
61 | GDB can try to place a breakpoint to monitor shared library | |
62 | events. | |
63 | ||
64 | If none of these symbols are found, or other errors occur, then | |
65 | SVR4 systems will fall back to using a symbol as the "startup | |
66 | mapping complete" breakpoint address. */ | |
67 | ||
68 | #ifdef SVR4_SHARED_LIBS | |
c5aa993b JM |
69 | static char *solib_break_names[] = |
70 | { | |
c906108c SS |
71 | "r_debug_state", |
72 | "_r_debug_state", | |
73 | "_dl_debug_state", | |
74 | "rtld_db_dlactivity", | |
75 | NULL | |
76 | }; | |
77 | #endif | |
78 | ||
79 | #define BKPT_AT_SYMBOL 1 | |
80 | ||
81 | #if defined (BKPT_AT_SYMBOL) && defined (SVR4_SHARED_LIBS) | |
c5aa993b JM |
82 | static char *bkpt_names[] = |
83 | { | |
c906108c SS |
84 | #ifdef SOLIB_BKPT_NAME |
85 | SOLIB_BKPT_NAME, /* Prefer configured name if it exists. */ | |
86 | #endif | |
87 | "_start", | |
88 | "main", | |
89 | NULL | |
90 | }; | |
91 | #endif | |
92 | ||
93 | /* Symbols which are used to locate the base of the link map structures. */ | |
94 | ||
95 | #ifndef SVR4_SHARED_LIBS | |
c5aa993b JM |
96 | static char *debug_base_symbols[] = |
97 | { | |
c906108c SS |
98 | "_DYNAMIC", |
99 | "_DYNAMIC__MGC", | |
100 | NULL | |
101 | }; | |
102 | #endif | |
103 | ||
c5aa993b JM |
104 | static char *main_name_list[] = |
105 | { | |
c906108c SS |
106 | "main_$main", |
107 | NULL | |
108 | }; | |
109 | ||
110 | /* local data declarations */ | |
111 | ||
07cd4b97 JB |
112 | /* Macro to extract an address from a solib structure. |
113 | When GDB is configured for some 32-bit targets (e.g. Solaris 2.7 | |
114 | sparc), BFD is configured to handle 64-bit targets, so CORE_ADDR is | |
115 | 64 bits. We have to extract only the significant bits of addresses | |
116 | to get the right address when accessing the core file BFD. */ | |
117 | ||
118 | #define SOLIB_EXTRACT_ADDRESS(member) \ | |
119 | extract_address (&member, sizeof (member)) | |
120 | ||
c906108c SS |
121 | #ifndef SVR4_SHARED_LIBS |
122 | ||
07cd4b97 JB |
123 | #define LM_ADDR(so) (SOLIB_EXTRACT_ADDRESS ((so) -> lm.lm_addr)) |
124 | #define LM_NEXT(so) (SOLIB_EXTRACT_ADDRESS ((so) -> lm.lm_next)) | |
125 | #define LM_NAME(so) (SOLIB_EXTRACT_ADDRESS ((so) -> lm.lm_name)) | |
c906108c | 126 | /* Test for first link map entry; first entry is a shared library. */ |
07cd4b97 | 127 | #define IGNORE_FIRST_LINK_MAP_ENTRY(so) (0) |
c906108c SS |
128 | static struct link_dynamic dynamic_copy; |
129 | static struct link_dynamic_2 ld_2_copy; | |
130 | static struct ld_debug debug_copy; | |
131 | static CORE_ADDR debug_addr; | |
132 | static CORE_ADDR flag_addr; | |
133 | ||
c5aa993b | 134 | #else /* SVR4_SHARED_LIBS */ |
c906108c | 135 | |
07cd4b97 JB |
136 | #define LM_ADDR(so) (SOLIB_EXTRACT_ADDRESS ((so) -> lm.l_addr)) |
137 | #define LM_NEXT(so) (SOLIB_EXTRACT_ADDRESS ((so) -> lm.l_next)) | |
138 | #define LM_NAME(so) (SOLIB_EXTRACT_ADDRESS ((so) -> lm.l_name)) | |
c906108c | 139 | /* Test for first link map entry; first entry is the exec-file. */ |
07cd4b97 JB |
140 | #define IGNORE_FIRST_LINK_MAP_ENTRY(so) \ |
141 | (SOLIB_EXTRACT_ADDRESS ((so) -> lm.l_prev) == 0) | |
c906108c SS |
142 | static struct r_debug debug_copy; |
143 | char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ | |
144 | ||
c5aa993b JM |
145 | #endif /* !SVR4_SHARED_LIBS */ |
146 | ||
147 | struct so_list | |
148 | { | |
07cd4b97 JB |
149 | /* The following fields of the structure come directly from the |
150 | dynamic linker's tables in the inferior, and are initialized by | |
151 | current_sos. */ | |
152 | ||
c5aa993b JM |
153 | struct so_list *next; /* next structure in linked list */ |
154 | struct link_map lm; /* copy of link map from inferior */ | |
07cd4b97 JB |
155 | CORE_ADDR lmaddr; /* addr in inferior lm was read from */ |
156 | ||
157 | /* Shared object file name, exactly as it appears in the | |
158 | inferior's link map. This may be a relative path, or something | |
159 | which needs to be looked up in LD_LIBRARY_PATH, etc. We use it | |
160 | to tell which entries in the inferior's dynamic linker's link | |
161 | map we've already loaded. */ | |
162 | char so_original_name[MAX_PATH_SIZE]; | |
163 | ||
164 | /* shared object file name, expanded to something GDB can open */ | |
165 | char so_name[MAX_PATH_SIZE]; | |
166 | ||
167 | /* The following fields of the structure are built from | |
168 | information gathered from the shared object file itself, and | |
169 | are initialized when we actually add it to our symbol tables. */ | |
170 | ||
171 | bfd *abfd; | |
c5aa993b | 172 | CORE_ADDR lmend; /* upper addr bound of mapped object */ |
c5aa993b JM |
173 | char symbols_loaded; /* flag: symbols read in yet? */ |
174 | char from_tty; /* flag: print msgs? */ | |
175 | struct objfile *objfile; /* objfile for loaded lib */ | |
176 | struct section_table *sections; | |
177 | struct section_table *sections_end; | |
178 | struct section_table *textsection; | |
c5aa993b | 179 | }; |
c906108c SS |
180 | |
181 | static struct so_list *so_list_head; /* List of known shared objects */ | |
c5aa993b | 182 | static CORE_ADDR debug_base; /* Base of dynamic linker structures */ |
c906108c SS |
183 | static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */ |
184 | ||
c5aa993b | 185 | static int solib_cleanup_queued = 0; /* make_run_cleanup called */ |
c906108c | 186 | |
a14ed312 | 187 | extern int fdmatch (int, int); /* In libiberty */ |
c906108c SS |
188 | |
189 | /* Local function prototypes */ | |
190 | ||
a14ed312 | 191 | static void do_clear_solib (PTR); |
c906108c | 192 | |
a14ed312 | 193 | static int match_main (char *); |
c906108c | 194 | |
a14ed312 | 195 | static void special_symbol_handling (void); |
c906108c | 196 | |
a14ed312 | 197 | static void sharedlibrary_command (char *, int); |
c906108c | 198 | |
a14ed312 | 199 | static int enable_break (void); |
c906108c | 200 | |
a14ed312 | 201 | static void info_sharedlibrary_command (char *, int); |
c906108c | 202 | |
a14ed312 | 203 | static int symbol_add_stub (PTR); |
c906108c | 204 | |
a14ed312 | 205 | static CORE_ADDR first_link_map_member (void); |
c906108c | 206 | |
a14ed312 | 207 | static CORE_ADDR locate_base (void); |
c906108c | 208 | |
a14ed312 | 209 | static int solib_map_sections (PTR); |
c906108c SS |
210 | |
211 | #ifdef SVR4_SHARED_LIBS | |
212 | ||
a14ed312 | 213 | static CORE_ADDR elf_locate_base (void); |
c906108c SS |
214 | |
215 | #else | |
216 | ||
07cd4b97 JB |
217 | static struct so_list *current_sos (void); |
218 | static void free_so (struct so_list *node); | |
219 | ||
a14ed312 | 220 | static int disable_break (void); |
c906108c | 221 | |
a14ed312 | 222 | static void allocate_rt_common_objfile (void); |
c906108c SS |
223 | |
224 | static void | |
07cd4b97 | 225 | solib_add_common_symbols (CORE_ADDR); |
c906108c SS |
226 | |
227 | #endif | |
228 | ||
a14ed312 | 229 | void _initialize_solib (void); |
c906108c SS |
230 | |
231 | /* If non-zero, this is a prefix that will be added to the front of the name | |
232 | shared libraries with an absolute filename for loading. */ | |
233 | static char *solib_absolute_prefix = NULL; | |
234 | ||
235 | /* If non-empty, this is a search path for loading non-absolute shared library | |
236 | symbol files. This takes precedence over the environment variables PATH | |
237 | and LD_LIBRARY_PATH. */ | |
238 | static char *solib_search_path = NULL; | |
239 | ||
240 | /* | |
241 | ||
c5aa993b | 242 | LOCAL FUNCTION |
c906108c | 243 | |
c5aa993b | 244 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 245 | |
c5aa993b | 246 | SYNOPSIS |
c906108c | 247 | |
c5aa993b | 248 | static int solib_map_sections (struct so_list *so) |
c906108c | 249 | |
c5aa993b | 250 | DESCRIPTION |
c906108c | 251 | |
c5aa993b JM |
252 | Given a pointer to one of the shared objects in our list |
253 | of mapped objects, use the recorded name to open a bfd | |
254 | descriptor for the object, build a section table, and then | |
255 | relocate all the section addresses by the base address at | |
256 | which the shared object was mapped. | |
c906108c | 257 | |
c5aa993b | 258 | FIXMES |
c906108c | 259 | |
c5aa993b JM |
260 | In most (all?) cases the shared object file name recorded in the |
261 | dynamic linkage tables will be a fully qualified pathname. For | |
262 | cases where it isn't, do we really mimic the systems search | |
263 | mechanism correctly in the below code (particularly the tilde | |
264 | expansion stuff?). | |
c906108c SS |
265 | */ |
266 | ||
267 | static int | |
268 | solib_map_sections (arg) | |
269 | PTR arg; | |
270 | { | |
271 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
272 | char *filename; | |
273 | char *scratch_pathname; | |
274 | int scratch_chan; | |
275 | struct section_table *p; | |
276 | struct cleanup *old_chain; | |
277 | bfd *abfd; | |
c5aa993b JM |
278 | |
279 | filename = tilde_expand (so->so_name); | |
280 | ||
c906108c SS |
281 | if (solib_absolute_prefix && ROOTED_P (filename)) |
282 | /* Prefix shared libraries with absolute filenames with | |
283 | SOLIB_ABSOLUTE_PREFIX. */ | |
284 | { | |
285 | char *pfxed_fn; | |
286 | int pfx_len; | |
287 | ||
288 | pfx_len = strlen (solib_absolute_prefix); | |
289 | ||
290 | /* Remove trailing slashes. */ | |
291 | while (pfx_len > 0 && SLASH_P (solib_absolute_prefix[pfx_len - 1])) | |
292 | pfx_len--; | |
293 | ||
294 | pfxed_fn = xmalloc (pfx_len + strlen (filename) + 1); | |
295 | strcpy (pfxed_fn, solib_absolute_prefix); | |
296 | strcat (pfxed_fn, filename); | |
297 | free (filename); | |
298 | ||
299 | filename = pfxed_fn; | |
300 | } | |
301 | ||
302 | old_chain = make_cleanup (free, filename); | |
303 | ||
304 | scratch_chan = -1; | |
305 | ||
306 | if (solib_search_path) | |
307 | scratch_chan = openp (solib_search_path, | |
308 | 1, filename, O_RDONLY, 0, &scratch_pathname); | |
309 | if (scratch_chan < 0) | |
c5aa993b | 310 | scratch_chan = openp (get_in_environ (inferior_environ, "PATH"), |
c906108c SS |
311 | 1, filename, O_RDONLY, 0, &scratch_pathname); |
312 | if (scratch_chan < 0) | |
313 | { | |
c5aa993b JM |
314 | scratch_chan = openp (get_in_environ |
315 | (inferior_environ, "LD_LIBRARY_PATH"), | |
c906108c SS |
316 | 1, filename, O_RDONLY, 0, &scratch_pathname); |
317 | } | |
318 | if (scratch_chan < 0) | |
319 | { | |
320 | perror_with_name (filename); | |
321 | } | |
322 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ | |
323 | ||
324 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); | |
325 | if (!abfd) | |
326 | { | |
327 | close (scratch_chan); | |
328 | error ("Could not open `%s' as an executable file: %s", | |
329 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
330 | } | |
331 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ | |
c5aa993b JM |
332 | so->abfd = abfd; |
333 | abfd->cacheable = true; | |
c906108c SS |
334 | |
335 | /* copy full path name into so_name, so that later symbol_file_add can find | |
336 | it */ | |
337 | if (strlen (scratch_pathname) >= MAX_PATH_SIZE) | |
338 | error ("Full path name length of shared library exceeds MAX_PATH_SIZE in so_list structure."); | |
339 | strcpy (so->so_name, scratch_pathname); | |
340 | ||
341 | if (!bfd_check_format (abfd, bfd_object)) | |
342 | { | |
343 | error ("\"%s\": not in executable format: %s.", | |
344 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
345 | } | |
c5aa993b | 346 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
c906108c | 347 | { |
c5aa993b | 348 | error ("Can't find the file sections in `%s': %s", |
c906108c SS |
349 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
350 | } | |
351 | ||
c5aa993b | 352 | for (p = so->sections; p < so->sections_end; p++) |
c906108c SS |
353 | { |
354 | /* Relocate the section binding addresses as recorded in the shared | |
c5aa993b JM |
355 | object's file by the base address to which the object was actually |
356 | mapped. */ | |
07cd4b97 JB |
357 | p->addr += LM_ADDR (so); |
358 | p->endaddr += LM_ADDR (so); | |
359 | so->lmend = max (p->endaddr, so->lmend); | |
c5aa993b | 360 | if (STREQ (p->the_bfd_section->name, ".text")) |
c906108c | 361 | { |
c5aa993b | 362 | so->textsection = p; |
c906108c SS |
363 | } |
364 | } | |
365 | ||
366 | /* Free the file names, close the file now. */ | |
367 | do_cleanups (old_chain); | |
368 | ||
369 | return (1); | |
370 | } | |
371 | ||
372 | #ifndef SVR4_SHARED_LIBS | |
373 | ||
374 | /* Allocate the runtime common object file. */ | |
375 | ||
376 | static void | |
377 | allocate_rt_common_objfile () | |
378 | { | |
379 | struct objfile *objfile; | |
380 | struct objfile *last_one; | |
381 | ||
382 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
383 | memset (objfile, 0, sizeof (struct objfile)); | |
c5aa993b JM |
384 | objfile->md = NULL; |
385 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
c906108c | 386 | xmalloc, free); |
c5aa993b | 387 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
c906108c | 388 | free); |
c5aa993b | 389 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
c906108c | 390 | free); |
c5aa993b | 391 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
c906108c | 392 | free); |
c5aa993b | 393 | objfile->name = mstrsave (objfile->md, "rt_common"); |
c906108c SS |
394 | |
395 | /* Add this file onto the tail of the linked list of other such files. */ | |
396 | ||
c5aa993b | 397 | objfile->next = NULL; |
c906108c SS |
398 | if (object_files == NULL) |
399 | object_files = objfile; | |
400 | else | |
401 | { | |
402 | for (last_one = object_files; | |
c5aa993b JM |
403 | last_one->next; |
404 | last_one = last_one->next); | |
405 | last_one->next = objfile; | |
c906108c SS |
406 | } |
407 | ||
408 | rt_common_objfile = objfile; | |
409 | } | |
410 | ||
411 | /* Read all dynamically loaded common symbol definitions from the inferior | |
412 | and put them into the minimal symbol table for the runtime common | |
413 | objfile. */ | |
414 | ||
415 | static void | |
416 | solib_add_common_symbols (rtc_symp) | |
07cd4b97 | 417 | CORE_ADDR rtc_symp; |
c906108c SS |
418 | { |
419 | struct rtc_symb inferior_rtc_symb; | |
420 | struct nlist inferior_rtc_nlist; | |
421 | int len; | |
422 | char *name; | |
423 | ||
424 | /* Remove any runtime common symbols from previous runs. */ | |
425 | ||
c5aa993b | 426 | if (rt_common_objfile != NULL && rt_common_objfile->minimal_symbol_count) |
c906108c | 427 | { |
c5aa993b JM |
428 | obstack_free (&rt_common_objfile->symbol_obstack, 0); |
429 | obstack_specify_allocation (&rt_common_objfile->symbol_obstack, 0, 0, | |
c906108c | 430 | xmalloc, free); |
c5aa993b JM |
431 | rt_common_objfile->minimal_symbol_count = 0; |
432 | rt_common_objfile->msymbols = NULL; | |
c906108c SS |
433 | } |
434 | ||
435 | init_minimal_symbol_collection (); | |
56e290f4 | 436 | make_cleanup_discard_minimal_symbols (); |
c906108c SS |
437 | |
438 | while (rtc_symp) | |
439 | { | |
07cd4b97 | 440 | read_memory (rtc_symp, |
c906108c SS |
441 | (char *) &inferior_rtc_symb, |
442 | sizeof (inferior_rtc_symb)); | |
07cd4b97 | 443 | read_memory (SOLIB_EXTRACT_ADDRESS (inferior_rtc_symb.rtc_sp), |
c906108c | 444 | (char *) &inferior_rtc_nlist, |
c5aa993b | 445 | sizeof (inferior_rtc_nlist)); |
c906108c SS |
446 | if (inferior_rtc_nlist.n_type == N_COMM) |
447 | { | |
448 | /* FIXME: The length of the symbol name is not available, but in the | |
449 | current implementation the common symbol is allocated immediately | |
450 | behind the name of the symbol. */ | |
451 | len = inferior_rtc_nlist.n_value - inferior_rtc_nlist.n_un.n_strx; | |
452 | ||
453 | name = xmalloc (len); | |
07cd4b97 JB |
454 | read_memory (SOLIB_EXTRACT_ADDRESS (inferior_rtc_nlist.n_un.n_name), |
455 | name, len); | |
c906108c SS |
456 | |
457 | /* Allocate the runtime common objfile if necessary. */ | |
458 | if (rt_common_objfile == NULL) | |
459 | allocate_rt_common_objfile (); | |
460 | ||
461 | prim_record_minimal_symbol (name, inferior_rtc_nlist.n_value, | |
462 | mst_bss, rt_common_objfile); | |
463 | free (name); | |
464 | } | |
07cd4b97 | 465 | rtc_symp = SOLIB_EXTRACT_ADDRESS (inferior_rtc_symb.rtc_next); |
c906108c SS |
466 | } |
467 | ||
468 | /* Install any minimal symbols that have been collected as the current | |
469 | minimal symbols for the runtime common objfile. */ | |
470 | ||
471 | install_minimal_symbols (rt_common_objfile); | |
472 | } | |
473 | ||
c5aa993b | 474 | #endif /* SVR4_SHARED_LIBS */ |
c906108c SS |
475 | |
476 | ||
477 | #ifdef SVR4_SHARED_LIBS | |
478 | ||
a14ed312 | 479 | static CORE_ADDR bfd_lookup_symbol (bfd *, char *); |
c906108c SS |
480 | |
481 | /* | |
482 | ||
c5aa993b | 483 | LOCAL FUNCTION |
c906108c | 484 | |
c5aa993b | 485 | bfd_lookup_symbol -- lookup the value for a specific symbol |
c906108c | 486 | |
c5aa993b | 487 | SYNOPSIS |
c906108c | 488 | |
c5aa993b | 489 | CORE_ADDR bfd_lookup_symbol (bfd *abfd, char *symname) |
c906108c | 490 | |
c5aa993b | 491 | DESCRIPTION |
c906108c | 492 | |
c5aa993b JM |
493 | An expensive way to lookup the value of a single symbol for |
494 | bfd's that are only temporary anyway. This is used by the | |
495 | shared library support to find the address of the debugger | |
496 | interface structures in the shared library. | |
c906108c | 497 | |
c5aa993b JM |
498 | Note that 0 is specifically allowed as an error return (no |
499 | such symbol). | |
500 | */ | |
c906108c SS |
501 | |
502 | static CORE_ADDR | |
503 | bfd_lookup_symbol (abfd, symname) | |
504 | bfd *abfd; | |
505 | char *symname; | |
506 | { | |
507 | unsigned int storage_needed; | |
508 | asymbol *sym; | |
509 | asymbol **symbol_table; | |
510 | unsigned int number_of_symbols; | |
511 | unsigned int i; | |
512 | struct cleanup *back_to; | |
513 | CORE_ADDR symaddr = 0; | |
c5aa993b | 514 | |
c906108c SS |
515 | storage_needed = bfd_get_symtab_upper_bound (abfd); |
516 | ||
517 | if (storage_needed > 0) | |
518 | { | |
519 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
c5aa993b JM |
520 | back_to = make_cleanup (free, (PTR) symbol_table); |
521 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
522 | ||
c906108c SS |
523 | for (i = 0; i < number_of_symbols; i++) |
524 | { | |
525 | sym = *symbol_table++; | |
c5aa993b | 526 | if (STREQ (sym->name, symname)) |
c906108c SS |
527 | { |
528 | /* Bfd symbols are section relative. */ | |
c5aa993b | 529 | symaddr = sym->value + sym->section->vma; |
c906108c SS |
530 | break; |
531 | } | |
532 | } | |
533 | do_cleanups (back_to); | |
534 | } | |
535 | return (symaddr); | |
536 | } | |
537 | ||
538 | #ifdef HANDLE_SVR4_EXEC_EMULATORS | |
539 | ||
540 | /* | |
c5aa993b JM |
541 | Solaris BCP (the part of Solaris which allows it to run SunOS4 |
542 | a.out files) throws in another wrinkle. Solaris does not fill | |
543 | in the usual a.out link map structures when running BCP programs, | |
544 | the only way to get at them is via groping around in the dynamic | |
545 | linker. | |
546 | The dynamic linker and it's structures are located in the shared | |
547 | C library, which gets run as the executable's "interpreter" by | |
548 | the kernel. | |
549 | ||
550 | Note that we can assume nothing about the process state at the time | |
551 | we need to find these structures. We may be stopped on the first | |
552 | instruction of the interpreter (C shared library), the first | |
553 | instruction of the executable itself, or somewhere else entirely | |
554 | (if we attached to the process for example). | |
555 | */ | |
556 | ||
557 | static char *debug_base_symbols[] = | |
558 | { | |
559 | "r_debug", /* Solaris 2.3 */ | |
560 | "_r_debug", /* Solaris 2.1, 2.2 */ | |
c906108c SS |
561 | NULL |
562 | }; | |
563 | ||
a14ed312 | 564 | static int look_for_base (int, CORE_ADDR); |
c906108c SS |
565 | |
566 | /* | |
567 | ||
c5aa993b | 568 | LOCAL FUNCTION |
c906108c | 569 | |
c5aa993b | 570 | look_for_base -- examine file for each mapped address segment |
c906108c | 571 | |
c5aa993b | 572 | SYNOPSYS |
c906108c | 573 | |
c5aa993b | 574 | static int look_for_base (int fd, CORE_ADDR baseaddr) |
c906108c | 575 | |
c5aa993b | 576 | DESCRIPTION |
c906108c | 577 | |
c5aa993b JM |
578 | This function is passed to proc_iterate_over_mappings, which |
579 | causes it to get called once for each mapped address space, with | |
580 | an open file descriptor for the file mapped to that space, and the | |
581 | base address of that mapped space. | |
c906108c | 582 | |
c5aa993b JM |
583 | Our job is to find the debug base symbol in the file that this |
584 | fd is open on, if it exists, and if so, initialize the dynamic | |
585 | linker structure base address debug_base. | |
c906108c | 586 | |
c5aa993b JM |
587 | Note that this is a computationally expensive proposition, since |
588 | we basically have to open a bfd on every call, so we specifically | |
589 | avoid opening the exec file. | |
c906108c SS |
590 | */ |
591 | ||
592 | static int | |
593 | look_for_base (fd, baseaddr) | |
594 | int fd; | |
595 | CORE_ADDR baseaddr; | |
596 | { | |
597 | bfd *interp_bfd; | |
598 | CORE_ADDR address = 0; | |
599 | char **symbolp; | |
600 | ||
601 | /* If the fd is -1, then there is no file that corresponds to this | |
602 | mapped memory segment, so skip it. Also, if the fd corresponds | |
603 | to the exec file, skip it as well. */ | |
604 | ||
605 | if (fd == -1 | |
606 | || (exec_bfd != NULL | |
c5aa993b | 607 | && fdmatch (fileno ((FILE *) (exec_bfd->iostream)), fd))) |
c906108c SS |
608 | { |
609 | return (0); | |
610 | } | |
611 | ||
612 | /* Try to open whatever random file this fd corresponds to. Note that | |
613 | we have no way currently to find the filename. Don't gripe about | |
614 | any problems we might have, just fail. */ | |
615 | ||
616 | if ((interp_bfd = bfd_fdopenr ("unnamed", gnutarget, fd)) == NULL) | |
617 | { | |
618 | return (0); | |
619 | } | |
620 | if (!bfd_check_format (interp_bfd, bfd_object)) | |
621 | { | |
622 | /* FIXME-leak: on failure, might not free all memory associated with | |
c5aa993b | 623 | interp_bfd. */ |
c906108c SS |
624 | bfd_close (interp_bfd); |
625 | return (0); | |
626 | } | |
627 | ||
628 | /* Now try to find our debug base symbol in this file, which we at | |
629 | least know to be a valid ELF executable or shared library. */ | |
630 | ||
631 | for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++) | |
632 | { | |
633 | address = bfd_lookup_symbol (interp_bfd, *symbolp); | |
634 | if (address != 0) | |
635 | { | |
636 | break; | |
637 | } | |
638 | } | |
639 | if (address == 0) | |
640 | { | |
641 | /* FIXME-leak: on failure, might not free all memory associated with | |
c5aa993b | 642 | interp_bfd. */ |
c906108c SS |
643 | bfd_close (interp_bfd); |
644 | return (0); | |
645 | } | |
646 | ||
647 | /* Eureka! We found the symbol. But now we may need to relocate it | |
648 | by the base address. If the symbol's value is less than the base | |
649 | address of the shared library, then it hasn't yet been relocated | |
650 | by the dynamic linker, and we have to do it ourself. FIXME: Note | |
651 | that we make the assumption that the first segment that corresponds | |
652 | to the shared library has the base address to which the library | |
653 | was relocated. */ | |
654 | ||
655 | if (address < baseaddr) | |
656 | { | |
657 | address += baseaddr; | |
658 | } | |
659 | debug_base = address; | |
660 | /* FIXME-leak: on failure, might not free all memory associated with | |
661 | interp_bfd. */ | |
662 | bfd_close (interp_bfd); | |
663 | return (1); | |
664 | } | |
665 | #endif /* HANDLE_SVR4_EXEC_EMULATORS */ | |
666 | ||
667 | /* | |
668 | ||
c5aa993b | 669 | LOCAL FUNCTION |
c906108c | 670 | |
c5aa993b JM |
671 | elf_locate_base -- locate the base address of dynamic linker structs |
672 | for SVR4 elf targets. | |
c906108c | 673 | |
c5aa993b | 674 | SYNOPSIS |
c906108c | 675 | |
c5aa993b | 676 | CORE_ADDR elf_locate_base (void) |
c906108c | 677 | |
c5aa993b | 678 | DESCRIPTION |
c906108c | 679 | |
c5aa993b JM |
680 | For SVR4 elf targets the address of the dynamic linker's runtime |
681 | structure is contained within the dynamic info section in the | |
682 | executable file. The dynamic section is also mapped into the | |
683 | inferior address space. Because the runtime loader fills in the | |
684 | real address before starting the inferior, we have to read in the | |
685 | dynamic info section from the inferior address space. | |
686 | If there are any errors while trying to find the address, we | |
687 | silently return 0, otherwise the found address is returned. | |
c906108c SS |
688 | |
689 | */ | |
690 | ||
691 | static CORE_ADDR | |
692 | elf_locate_base () | |
693 | { | |
694 | sec_ptr dyninfo_sect; | |
695 | int dyninfo_sect_size; | |
696 | CORE_ADDR dyninfo_addr; | |
697 | char *buf; | |
698 | char *bufend; | |
f5b8946c | 699 | int arch_size; |
c906108c SS |
700 | |
701 | /* Find the start address of the .dynamic section. */ | |
702 | dyninfo_sect = bfd_get_section_by_name (exec_bfd, ".dynamic"); | |
703 | if (dyninfo_sect == NULL) | |
704 | return 0; | |
705 | dyninfo_addr = bfd_section_vma (exec_bfd, dyninfo_sect); | |
706 | ||
707 | /* Read in .dynamic section, silently ignore errors. */ | |
708 | dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect); | |
709 | buf = alloca (dyninfo_sect_size); | |
710 | if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size)) | |
711 | return 0; | |
712 | ||
713 | /* Find the DT_DEBUG entry in the the .dynamic section. | |
714 | For mips elf we look for DT_MIPS_RLD_MAP, mips elf apparently has | |
715 | no DT_DEBUG entries. */ | |
f5b8946c | 716 | |
6ceadee4 | 717 | arch_size = bfd_get_arch_size (exec_bfd); |
f5b8946c MS |
718 | if (arch_size == -1) /* failure */ |
719 | return 0; | |
720 | ||
721 | if (arch_size == 32) | |
722 | { /* 32-bit elf */ | |
723 | for (bufend = buf + dyninfo_sect_size; | |
724 | buf < bufend; | |
725 | buf += sizeof (Elf32_External_Dyn)) | |
c906108c | 726 | { |
f5b8946c MS |
727 | Elf32_External_Dyn *x_dynp = (Elf32_External_Dyn *) buf; |
728 | long dyn_tag; | |
729 | CORE_ADDR dyn_ptr; | |
730 | ||
731 | dyn_tag = bfd_h_get_32 (exec_bfd, (bfd_byte *) x_dynp->d_tag); | |
732 | if (dyn_tag == DT_NULL) | |
733 | break; | |
734 | else if (dyn_tag == DT_DEBUG) | |
735 | { | |
736 | dyn_ptr = bfd_h_get_32 (exec_bfd, | |
737 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
738 | return dyn_ptr; | |
739 | } | |
c906108c | 740 | #ifdef DT_MIPS_RLD_MAP |
f5b8946c MS |
741 | else if (dyn_tag == DT_MIPS_RLD_MAP) |
742 | { | |
743 | char pbuf[TARGET_PTR_BIT / HOST_CHAR_BIT]; | |
744 | ||
745 | /* DT_MIPS_RLD_MAP contains a pointer to the address | |
746 | of the dynamic link structure. */ | |
747 | dyn_ptr = bfd_h_get_32 (exec_bfd, | |
748 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
749 | if (target_read_memory (dyn_ptr, pbuf, sizeof (pbuf))) | |
750 | return 0; | |
751 | return extract_unsigned_integer (pbuf, sizeof (pbuf)); | |
752 | } | |
c906108c | 753 | #endif |
f5b8946c | 754 | } |
c906108c | 755 | } |
f5b8946c | 756 | else /* 64-bit elf */ |
c906108c | 757 | { |
f5b8946c MS |
758 | for (bufend = buf + dyninfo_sect_size; |
759 | buf < bufend; | |
760 | buf += sizeof (Elf64_External_Dyn)) | |
c906108c | 761 | { |
f5b8946c MS |
762 | Elf64_External_Dyn *x_dynp = (Elf64_External_Dyn *) buf; |
763 | long dyn_tag; | |
764 | CORE_ADDR dyn_ptr; | |
765 | ||
766 | dyn_tag = bfd_h_get_64 (exec_bfd, (bfd_byte *) x_dynp->d_tag); | |
767 | if (dyn_tag == DT_NULL) | |
768 | break; | |
769 | else if (dyn_tag == DT_DEBUG) | |
770 | { | |
771 | dyn_ptr = bfd_h_get_64 (exec_bfd, | |
772 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
773 | return dyn_ptr; | |
774 | } | |
c906108c SS |
775 | } |
776 | } | |
c906108c SS |
777 | |
778 | /* DT_DEBUG entry not found. */ | |
779 | return 0; | |
780 | } | |
781 | ||
c5aa993b | 782 | #endif /* SVR4_SHARED_LIBS */ |
c906108c SS |
783 | |
784 | /* | |
785 | ||
c5aa993b | 786 | LOCAL FUNCTION |
c906108c | 787 | |
c5aa993b | 788 | locate_base -- locate the base address of dynamic linker structs |
c906108c | 789 | |
c5aa993b | 790 | SYNOPSIS |
c906108c | 791 | |
c5aa993b | 792 | CORE_ADDR locate_base (void) |
c906108c | 793 | |
c5aa993b | 794 | DESCRIPTION |
c906108c | 795 | |
c5aa993b JM |
796 | For both the SunOS and SVR4 shared library implementations, if the |
797 | inferior executable has been linked dynamically, there is a single | |
798 | address somewhere in the inferior's data space which is the key to | |
799 | locating all of the dynamic linker's runtime structures. This | |
800 | address is the value of the debug base symbol. The job of this | |
801 | function is to find and return that address, or to return 0 if there | |
802 | is no such address (the executable is statically linked for example). | |
c906108c | 803 | |
c5aa993b JM |
804 | For SunOS, the job is almost trivial, since the dynamic linker and |
805 | all of it's structures are statically linked to the executable at | |
806 | link time. Thus the symbol for the address we are looking for has | |
807 | already been added to the minimal symbol table for the executable's | |
808 | objfile at the time the symbol file's symbols were read, and all we | |
809 | have to do is look it up there. Note that we explicitly do NOT want | |
810 | to find the copies in the shared library. | |
c906108c | 811 | |
c5aa993b JM |
812 | The SVR4 version is a bit more complicated because the address |
813 | is contained somewhere in the dynamic info section. We have to go | |
814 | to a lot more work to discover the address of the debug base symbol. | |
815 | Because of this complexity, we cache the value we find and return that | |
816 | value on subsequent invocations. Note there is no copy in the | |
817 | executable symbol tables. | |
c906108c SS |
818 | |
819 | */ | |
820 | ||
821 | static CORE_ADDR | |
822 | locate_base () | |
823 | { | |
824 | ||
825 | #ifndef SVR4_SHARED_LIBS | |
826 | ||
827 | struct minimal_symbol *msymbol; | |
828 | CORE_ADDR address = 0; | |
829 | char **symbolp; | |
830 | ||
831 | /* For SunOS, we want to limit the search for the debug base symbol to the | |
832 | executable being debugged, since there is a duplicate named symbol in the | |
833 | shared library. We don't want the shared library versions. */ | |
834 | ||
835 | for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++) | |
836 | { | |
837 | msymbol = lookup_minimal_symbol (*symbolp, NULL, symfile_objfile); | |
838 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) | |
839 | { | |
840 | address = SYMBOL_VALUE_ADDRESS (msymbol); | |
841 | return (address); | |
842 | } | |
843 | } | |
844 | return (0); | |
845 | ||
c5aa993b | 846 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
847 | |
848 | /* Check to see if we have a currently valid address, and if so, avoid | |
849 | doing all this work again and just return the cached address. If | |
850 | we have no cached address, try to locate it in the dynamic info | |
851 | section for ELF executables. */ | |
852 | ||
853 | if (debug_base == 0) | |
854 | { | |
855 | if (exec_bfd != NULL | |
856 | && bfd_get_flavour (exec_bfd) == bfd_target_elf_flavour) | |
857 | debug_base = elf_locate_base (); | |
858 | #ifdef HANDLE_SVR4_EXEC_EMULATORS | |
859 | /* Try it the hard way for emulated executables. */ | |
860 | else if (inferior_pid != 0 && target_has_execution) | |
861 | proc_iterate_over_mappings (look_for_base); | |
862 | #endif | |
863 | } | |
864 | return (debug_base); | |
865 | ||
c5aa993b | 866 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
867 | |
868 | } | |
869 | ||
870 | /* | |
871 | ||
c5aa993b | 872 | LOCAL FUNCTION |
c906108c | 873 | |
c5aa993b | 874 | first_link_map_member -- locate first member in dynamic linker's map |
c906108c | 875 | |
c5aa993b | 876 | SYNOPSIS |
c906108c | 877 | |
07cd4b97 | 878 | static CORE_ADDR first_link_map_member (void) |
c906108c | 879 | |
c5aa993b | 880 | DESCRIPTION |
c906108c | 881 | |
9ddea9f1 JB |
882 | Find the first element in the inferior's dynamic link map, and |
883 | return its address in the inferior. This function doesn't copy the | |
07cd4b97 | 884 | link map entry itself into our address space; current_sos actually |
9ddea9f1 | 885 | does the reading. */ |
c906108c | 886 | |
07cd4b97 | 887 | static CORE_ADDR |
c906108c SS |
888 | first_link_map_member () |
889 | { | |
07cd4b97 | 890 | CORE_ADDR lm = 0; |
c906108c SS |
891 | |
892 | #ifndef SVR4_SHARED_LIBS | |
893 | ||
894 | read_memory (debug_base, (char *) &dynamic_copy, sizeof (dynamic_copy)); | |
895 | if (dynamic_copy.ld_version >= 2) | |
896 | { | |
897 | /* It is a version that we can deal with, so read in the secondary | |
c5aa993b | 898 | structure and find the address of the link map list from it. */ |
07cd4b97 JB |
899 | read_memory (SOLIB_EXTRACT_ADDRESS (dynamic_copy.ld_un.ld_2), |
900 | (char *) &ld_2_copy, sizeof (struct link_dynamic_2)); | |
901 | lm = SOLIB_EXTRACT_ADDRESS (ld_2_copy.ld_loaded); | |
c906108c SS |
902 | } |
903 | ||
c5aa993b | 904 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
905 | |
906 | read_memory (debug_base, (char *) &debug_copy, sizeof (struct r_debug)); | |
907 | /* FIXME: Perhaps we should validate the info somehow, perhaps by | |
908 | checking r_version for a known version number, or r_state for | |
909 | RT_CONSISTENT. */ | |
07cd4b97 | 910 | lm = SOLIB_EXTRACT_ADDRESS (debug_copy.r_map); |
c906108c | 911 | |
c5aa993b | 912 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
913 | |
914 | return (lm); | |
915 | } | |
916 | ||
104c1213 JM |
917 | #ifdef SVR4_SHARED_LIBS |
918 | /* | |
919 | ||
920 | LOCAL FUNCTION | |
921 | ||
9452d09b | 922 | open_symbol_file_object |
104c1213 JM |
923 | |
924 | SYNOPSIS | |
925 | ||
926 | void open_symbol_file_object (int from_tty) | |
927 | ||
928 | DESCRIPTION | |
929 | ||
930 | If no open symbol file, attempt to locate and open the main symbol | |
931 | file. On SVR4 systems, this is the first link map entry. If its | |
932 | name is here, we can open it. Useful when attaching to a process | |
933 | without first loading its symbol file. | |
934 | ||
935 | */ | |
936 | ||
9452d09b MS |
937 | static int |
938 | open_symbol_file_object (from_ttyp) | |
939 | int *from_ttyp; /* sneak past catch_errors */ | |
104c1213 | 940 | { |
07cd4b97 JB |
941 | CORE_ADDR lm; |
942 | struct link_map lmcopy; | |
104c1213 JM |
943 | char *filename; |
944 | int errcode; | |
945 | ||
946 | if (symfile_objfile) | |
947 | if (!query ("Attempt to reload symbols from process? ")) | |
948 | return 0; | |
949 | ||
950 | if ((debug_base = locate_base ()) == 0) | |
951 | return 0; /* failed somehow... */ | |
952 | ||
953 | /* First link map member should be the executable. */ | |
07cd4b97 | 954 | if ((lm = first_link_map_member ()) == 0) |
104c1213 JM |
955 | return 0; /* failed somehow... */ |
956 | ||
957 | /* Read from target memory to GDB. */ | |
07cd4b97 | 958 | read_memory (lm, (void *) &lmcopy, sizeof (lmcopy)); |
104c1213 JM |
959 | |
960 | if (lmcopy.l_name == 0) | |
961 | return 0; /* no filename. */ | |
962 | ||
963 | /* Now fetch the filename from target memory. */ | |
07cd4b97 | 964 | target_read_string (SOLIB_EXTRACT_ADDRESS (lmcopy.l_name), &filename, |
104c1213 JM |
965 | MAX_PATH_SIZE - 1, &errcode); |
966 | if (errcode) | |
967 | { | |
968 | warning ("failed to read exec filename from attached file: %s", | |
969 | safe_strerror (errcode)); | |
970 | return 0; | |
971 | } | |
972 | ||
74b7792f | 973 | make_cleanup (free, filename); |
104c1213 | 974 | /* Have a pathname: read the symbol file. */ |
9452d09b | 975 | symbol_file_command (filename, *from_ttyp); |
104c1213 JM |
976 | |
977 | return 1; | |
978 | } | |
979 | #endif /* SVR4_SHARED_LIBS */ | |
980 | ||
c906108c | 981 | |
07cd4b97 | 982 | /* LOCAL FUNCTION |
c906108c | 983 | |
07cd4b97 | 984 | free_so --- free a `struct so_list' object |
c906108c | 985 | |
c5aa993b | 986 | SYNOPSIS |
c906108c | 987 | |
07cd4b97 | 988 | void free_so (struct so_list *so) |
c906108c | 989 | |
c5aa993b | 990 | DESCRIPTION |
c906108c | 991 | |
07cd4b97 JB |
992 | Free the storage associated with the `struct so_list' object SO. |
993 | If we have opened a BFD for SO, close it. | |
c906108c | 994 | |
07cd4b97 JB |
995 | The caller is responsible for removing SO from whatever list it is |
996 | a member of. If we have placed SO's sections in some target's | |
997 | section table, the caller is responsible for removing them. | |
c906108c | 998 | |
07cd4b97 JB |
999 | This function doesn't mess with objfiles at all. If there is an |
1000 | objfile associated with SO that needs to be removed, the caller is | |
1001 | responsible for taking care of that. */ | |
1002 | ||
1003 | static void | |
1004 | free_so (struct so_list *so) | |
c906108c | 1005 | { |
07cd4b97 | 1006 | char *bfd_filename = 0; |
c5aa993b | 1007 | |
07cd4b97 JB |
1008 | if (so->sections) |
1009 | free (so->sections); | |
1010 | ||
1011 | if (so->abfd) | |
c906108c | 1012 | { |
07cd4b97 JB |
1013 | bfd_filename = bfd_get_filename (so->abfd); |
1014 | if (! bfd_close (so->abfd)) | |
1015 | warning ("cannot close \"%s\": %s", | |
1016 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
c906108c | 1017 | } |
07cd4b97 JB |
1018 | |
1019 | if (bfd_filename) | |
1020 | free (bfd_filename); | |
1021 | ||
1022 | free (so); | |
1023 | } | |
1024 | ||
1025 | ||
1026 | /* On some systems, the only way to recognize the link map entry for | |
1027 | the main executable file is by looking at its name. Return | |
1028 | non-zero iff SONAME matches one of the known main executable names. */ | |
1029 | ||
1030 | static int | |
1031 | match_main (soname) | |
1032 | char *soname; | |
1033 | { | |
1034 | char **mainp; | |
1035 | ||
1036 | for (mainp = main_name_list; *mainp != NULL; mainp++) | |
c906108c | 1037 | { |
07cd4b97 JB |
1038 | if (strcmp (soname, *mainp) == 0) |
1039 | return (1); | |
c906108c | 1040 | } |
07cd4b97 JB |
1041 | |
1042 | return (0); | |
1043 | } | |
1044 | ||
1045 | ||
1046 | /* LOCAL FUNCTION | |
1047 | ||
1048 | current_sos -- build a list of currently loaded shared objects | |
1049 | ||
1050 | SYNOPSIS | |
1051 | ||
1052 | struct so_list *current_sos () | |
1053 | ||
1054 | DESCRIPTION | |
1055 | ||
1056 | Build a list of `struct so_list' objects describing the shared | |
1057 | objects currently loaded in the inferior. This list does not | |
1058 | include an entry for the main executable file. | |
1059 | ||
1060 | Note that we only gather information directly available from the | |
1061 | inferior --- we don't examine any of the shared library files | |
1062 | themselves. The declaration of `struct so_list' says which fields | |
1063 | we provide values for. */ | |
1064 | ||
1065 | static struct so_list * | |
1066 | current_sos () | |
1067 | { | |
1068 | CORE_ADDR lm; | |
1069 | struct so_list *head = 0; | |
1070 | struct so_list **link_ptr = &head; | |
1071 | ||
1072 | /* Make sure we've looked up the inferior's dynamic linker's base | |
1073 | structure. */ | |
1074 | if (! debug_base) | |
c906108c | 1075 | { |
07cd4b97 JB |
1076 | debug_base = locate_base (); |
1077 | ||
1078 | /* If we can't find the dynamic linker's base structure, this | |
1079 | must not be a dynamically linked executable. Hmm. */ | |
1080 | if (! debug_base) | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | /* Walk the inferior's link map list, and build our list of | |
1085 | `struct so_list' nodes. */ | |
1086 | lm = first_link_map_member (); | |
1087 | while (lm) | |
1088 | { | |
1089 | struct so_list *new | |
1090 | = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
15588ebb | 1091 | struct cleanup *old_chain = make_cleanup (free, new); |
07cd4b97 JB |
1092 | memset (new, 0, sizeof (*new)); |
1093 | ||
c5aa993b | 1094 | new->lmaddr = lm; |
07cd4b97 | 1095 | read_memory (lm, (char *) &(new->lm), sizeof (struct link_map)); |
c906108c | 1096 | |
07cd4b97 | 1097 | lm = LM_NEXT (new); |
c5aa993b | 1098 | |
c906108c | 1099 | /* For SVR4 versions, the first entry in the link map is for the |
c5aa993b JM |
1100 | inferior executable, so we must ignore it. For some versions of |
1101 | SVR4, it has no name. For others (Solaris 2.3 for example), it | |
1102 | does have a name, so we can no longer use a missing name to | |
1103 | decide when to ignore it. */ | |
07cd4b97 | 1104 | if (IGNORE_FIRST_LINK_MAP_ENTRY (new)) |
15588ebb | 1105 | free_so (new); |
07cd4b97 | 1106 | else |
c906108c SS |
1107 | { |
1108 | int errcode; | |
1109 | char *buffer; | |
07cd4b97 JB |
1110 | |
1111 | /* Extract this shared object's name. */ | |
1112 | target_read_string (LM_NAME (new), &buffer, | |
c906108c SS |
1113 | MAX_PATH_SIZE - 1, &errcode); |
1114 | if (errcode != 0) | |
1115 | { | |
07cd4b97 | 1116 | warning ("current_sos: Can't read pathname for load map: %s\n", |
c906108c | 1117 | safe_strerror (errcode)); |
c906108c | 1118 | } |
07cd4b97 JB |
1119 | else |
1120 | { | |
1121 | strncpy (new->so_name, buffer, MAX_PATH_SIZE - 1); | |
1122 | new->so_name[MAX_PATH_SIZE - 1] = '\0'; | |
1123 | free (buffer); | |
1124 | strcpy (new->so_original_name, new->so_name); | |
1125 | } | |
1126 | ||
1127 | /* If this entry has no name, or its name matches the name | |
1128 | for the main executable, don't include it in the list. */ | |
1129 | if (! new->so_name[0] | |
1130 | || match_main (new->so_name)) | |
1131 | free_so (new); | |
1132 | else | |
1133 | { | |
1134 | new->next = 0; | |
1135 | *link_ptr = new; | |
1136 | link_ptr = &new->next; | |
1137 | } | |
c5aa993b | 1138 | } |
15588ebb JB |
1139 | |
1140 | discard_cleanups (old_chain); | |
c906108c | 1141 | } |
07cd4b97 JB |
1142 | |
1143 | return head; | |
c906108c SS |
1144 | } |
1145 | ||
07cd4b97 | 1146 | |
c906108c SS |
1147 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
1148 | ||
1149 | static int | |
1150 | symbol_add_stub (arg) | |
1151 | PTR arg; | |
1152 | { | |
07cd4b97 | 1153 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 1154 | struct section_addr_info *sap; |
9e124216 EZ |
1155 | CORE_ADDR lowest_addr = 0; |
1156 | int lowest_index; | |
1157 | asection *lowest_sect = NULL; | |
c906108c | 1158 | |
07cd4b97 JB |
1159 | /* Have we already loaded this shared object? */ |
1160 | ALL_OBJFILES (so->objfile) | |
1161 | { | |
1162 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
1163 | return 1; | |
1164 | } | |
1165 | ||
1166 | /* Find the shared object's text segment. */ | |
c5aa993b | 1167 | if (so->textsection) |
9e124216 EZ |
1168 | { |
1169 | lowest_addr = so->textsection->addr; | |
1170 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); | |
1171 | lowest_index = lowest_sect->index; | |
1172 | } | |
c5aa993b | 1173 | else if (so->abfd != NULL) |
c906108c | 1174 | { |
9e124216 EZ |
1175 | /* If we didn't find a mapped non zero sized .text section, set |
1176 | up lowest_addr so that the relocation in symbol_file_add does | |
1177 | no harm. */ | |
c5aa993b | 1178 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); |
c906108c | 1179 | if (lowest_sect == NULL) |
c5aa993b | 1180 | bfd_map_over_sections (so->abfd, find_lowest_section, |
96baa820 | 1181 | (PTR) &lowest_sect); |
c906108c | 1182 | if (lowest_sect) |
9e124216 EZ |
1183 | { |
1184 | lowest_addr = bfd_section_vma (so->abfd, lowest_sect) | |
1185 | + LM_ADDR (so); | |
1186 | lowest_index = lowest_sect->index; | |
1187 | } | |
c906108c | 1188 | } |
c5aa993b | 1189 | |
62557bbc KB |
1190 | sap = build_section_addr_info_from_section_table (so->sections, |
1191 | so->sections_end); | |
e7cf9df1 | 1192 | |
9e124216 EZ |
1193 | sap->other[lowest_index].addr = lowest_addr; |
1194 | ||
62557bbc KB |
1195 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
1196 | sap, 0, OBJF_SHARED); | |
1197 | free_section_addr_info (sap); | |
c906108c | 1198 | |
07cd4b97 | 1199 | return (1); |
c906108c SS |
1200 | } |
1201 | ||
c906108c | 1202 | |
07cd4b97 | 1203 | /* LOCAL FUNCTION |
c906108c | 1204 | |
105b175f | 1205 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 1206 | |
c5aa993b | 1207 | SYNOPSIS |
c906108c | 1208 | |
105b175f | 1209 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 1210 | |
07cd4b97 | 1211 | Extract the list of currently loaded shared objects from the |
105b175f JB |
1212 | inferior, and compare it with the list of shared objects currently |
1213 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
1214 | with the inferior's new list. | |
c906108c | 1215 | |
105b175f JB |
1216 | If we notice that the inferior has unloaded some shared objects, |
1217 | free any symbolic info GDB had read about those shared objects. | |
1218 | ||
1219 | Don't load symbolic info for any new shared objects; just add them | |
1220 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
1221 | |
1222 | If FROM_TTY is non-null, feel free to print messages about what | |
1223 | we're doing. | |
c906108c | 1224 | |
07cd4b97 JB |
1225 | If TARGET is non-null, add the sections of all new shared objects |
1226 | to TARGET's section table. Note that this doesn't remove any | |
1227 | sections for shared objects that have been unloaded, and it | |
1228 | doesn't check to see if the new shared objects are already present in | |
1229 | the section table. But we only use this for core files and | |
1230 | processes we've just attached to, so that's okay. */ | |
c906108c | 1231 | |
07cd4b97 | 1232 | void |
105b175f | 1233 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 JB |
1234 | { |
1235 | struct so_list *inferior = current_sos (); | |
1236 | struct so_list *gdb, **gdb_link; | |
1237 | ||
104c1213 JM |
1238 | #ifdef SVR4_SHARED_LIBS |
1239 | /* If we are attaching to a running process for which we | |
1240 | have not opened a symbol file, we may be able to get its | |
1241 | symbols now! */ | |
1242 | if (attach_flag && | |
1243 | symfile_objfile == NULL) | |
9452d09b | 1244 | catch_errors (open_symbol_file_object, (PTR) &from_tty, |
104c1213 JM |
1245 | "Error reading attached process's symbol file.\n", |
1246 | RETURN_MASK_ALL); | |
1247 | ||
1248 | #endif SVR4_SHARED_LIBS | |
1249 | ||
07cd4b97 JB |
1250 | /* Since this function might actually add some elements to the |
1251 | so_list_head list, arrange for it to be cleaned up when | |
1252 | appropriate. */ | |
1253 | if (!solib_cleanup_queued) | |
1254 | { | |
1255 | make_run_cleanup (do_clear_solib, NULL); | |
1256 | solib_cleanup_queued = 1; | |
c906108c | 1257 | } |
c5aa993b | 1258 | |
07cd4b97 JB |
1259 | /* GDB and the inferior's dynamic linker each maintain their own |
1260 | list of currently loaded shared objects; we want to bring the | |
1261 | former in sync with the latter. Scan both lists, seeing which | |
1262 | shared objects appear where. There are three cases: | |
1263 | ||
1264 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
1265 | knows about it already, and it's still loaded in the inferior. |
1266 | Nothing needs to happen. | |
07cd4b97 JB |
1267 | |
1268 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
1269 | the inferior has unloaded it. We should remove the shared |
1270 | object from GDB's tables. | |
07cd4b97 JB |
1271 | |
1272 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
1273 | means that it's just been loaded. We should add it to GDB's |
1274 | tables. | |
07cd4b97 JB |
1275 | |
1276 | So we walk GDB's list, checking each entry to see if it appears | |
1277 | in the inferior's list too. If it does, no action is needed, and | |
1278 | we remove it from the inferior's list. If it doesn't, the | |
1279 | inferior has unloaded it, and we remove it from GDB's list. By | |
1280 | the time we're done walking GDB's list, the inferior's list | |
1281 | contains only the new shared objects, which we then add. */ | |
1282 | ||
1283 | gdb = so_list_head; | |
1284 | gdb_link = &so_list_head; | |
1285 | while (gdb) | |
c906108c | 1286 | { |
07cd4b97 JB |
1287 | struct so_list *i = inferior; |
1288 | struct so_list **i_link = &inferior; | |
1289 | ||
1290 | /* Check to see whether the shared object *gdb also appears in | |
1291 | the inferior's current list. */ | |
1292 | while (i) | |
c906108c | 1293 | { |
07cd4b97 JB |
1294 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
1295 | break; | |
1296 | ||
1297 | i_link = &i->next; | |
1298 | i = *i_link; | |
c906108c | 1299 | } |
c5aa993b | 1300 | |
07cd4b97 JB |
1301 | /* If the shared object appears on the inferior's list too, then |
1302 | it's still loaded, so we don't need to do anything. Delete | |
1303 | it from the inferior's list, and leave it on GDB's list. */ | |
1304 | if (i) | |
c906108c | 1305 | { |
07cd4b97 | 1306 | *i_link = i->next; |
07cd4b97 JB |
1307 | free_so (i); |
1308 | gdb_link = &gdb->next; | |
1309 | gdb = *gdb_link; | |
1310 | } | |
1311 | ||
1312 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
1313 | else | |
1314 | { | |
1315 | *gdb_link = gdb->next; | |
07cd4b97 JB |
1316 | |
1317 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 1318 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
1319 | free_objfile (gdb->objfile); |
1320 | ||
1321 | /* Some targets' section tables might be referring to | |
1322 | sections from so->abfd; remove them. */ | |
1323 | remove_target_sections (gdb->abfd); | |
1324 | ||
1325 | free_so (gdb); | |
1326 | gdb = *gdb_link; | |
c906108c SS |
1327 | } |
1328 | } | |
c5aa993b | 1329 | |
07cd4b97 JB |
1330 | /* Now the inferior's list contains only shared objects that don't |
1331 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 1332 | to GDB's shared object list. */ |
07cd4b97 | 1333 | if (inferior) |
c906108c | 1334 | { |
07cd4b97 JB |
1335 | struct so_list *i; |
1336 | ||
1337 | /* Add the new shared objects to GDB's list. */ | |
1338 | *gdb_link = inferior; | |
1339 | ||
e8930304 | 1340 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 1341 | for (i = inferior; i; i = i->next) |
c906108c | 1342 | { |
07cd4b97 JB |
1343 | i->from_tty = from_tty; |
1344 | ||
1345 | /* Fill in the rest of the `struct so_list' node. */ | |
1346 | catch_errors (solib_map_sections, i, | |
1347 | "Error while mapping shared library sections:\n", | |
1348 | RETURN_MASK_ALL); | |
07cd4b97 JB |
1349 | } |
1350 | ||
1351 | /* If requested, add the shared objects' sections to the the | |
1352 | TARGET's section table. */ | |
1353 | if (target) | |
1354 | { | |
1355 | int new_sections; | |
1356 | ||
1357 | /* Figure out how many sections we'll need to add in total. */ | |
1358 | new_sections = 0; | |
1359 | for (i = inferior; i; i = i->next) | |
1360 | new_sections += (i->sections_end - i->sections); | |
1361 | ||
1362 | if (new_sections > 0) | |
c906108c | 1363 | { |
07cd4b97 JB |
1364 | int space = target_resize_to_sections (target, new_sections); |
1365 | ||
1366 | for (i = inferior; i; i = i->next) | |
1367 | { | |
1368 | int count = (i->sections_end - i->sections); | |
1369 | memcpy (target->to_sections + space, | |
1370 | i->sections, | |
1371 | count * sizeof (i->sections[0])); | |
1372 | space += count; | |
1373 | } | |
c906108c SS |
1374 | } |
1375 | } | |
e8930304 | 1376 | } |
105b175f JB |
1377 | } |
1378 | ||
1379 | ||
1380 | /* GLOBAL FUNCTION | |
1381 | ||
1382 | solib_add -- read in symbol info for newly added shared libraries | |
1383 | ||
1384 | SYNOPSIS | |
1385 | ||
1386 | void solib_add (char *pattern, int from_tty, struct target_ops *TARGET) | |
1387 | ||
1388 | DESCRIPTION | |
1389 | ||
1390 | Read in symbolic information for any shared objects whose names | |
1391 | match PATTERN. (If we've already read a shared object's symbol | |
1392 | info, leave it alone.) If PATTERN is zero, read them all. | |
1393 | ||
1394 | FROM_TTY and TARGET are as described for update_solib_list, above. */ | |
1395 | ||
1396 | void | |
1397 | solib_add (char *pattern, int from_tty, struct target_ops *target) | |
1398 | { | |
1399 | struct so_list *gdb; | |
1400 | ||
1401 | if (pattern) | |
1402 | { | |
1403 | char *re_err = re_comp (pattern); | |
1404 | ||
1405 | if (re_err) | |
1406 | error ("Invalid regexp: %s", re_err); | |
1407 | } | |
1408 | ||
1409 | update_solib_list (from_tty, target); | |
c906108c | 1410 | |
105b175f JB |
1411 | /* Walk the list of currently loaded shared libraries, and read |
1412 | symbols for any that match the pattern --- or any whose symbols | |
1413 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
1414 | { |
1415 | int any_matches = 0; | |
1416 | int loaded_any_symbols = 0; | |
c906108c | 1417 | |
e8930304 JB |
1418 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
1419 | if (! pattern || re_exec (gdb->so_name)) | |
1420 | { | |
1421 | any_matches = 1; | |
1422 | ||
1423 | if (gdb->symbols_loaded) | |
1424 | { | |
1425 | if (from_tty) | |
1426 | printf_unfiltered ("Symbols already loaded for %s\n", | |
1427 | gdb->so_name); | |
1428 | } | |
1429 | else | |
1430 | { | |
1431 | if (catch_errors | |
1432 | (symbol_add_stub, gdb, | |
1433 | "Error while reading shared library symbols:\n", | |
1434 | RETURN_MASK_ALL)) | |
1435 | { | |
1436 | if (from_tty) | |
1437 | printf_unfiltered ("Loaded symbols for %s\n", | |
1438 | gdb->so_name); | |
1439 | gdb->symbols_loaded = 1; | |
1440 | loaded_any_symbols = 1; | |
1441 | } | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | if (from_tty && pattern && ! any_matches) | |
1446 | printf_unfiltered | |
1447 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1448 | ||
1449 | if (loaded_any_symbols) | |
1450 | { | |
1451 | /* Getting new symbols may change our opinion about what is | |
1452 | frameless. */ | |
1453 | reinit_frame_cache (); | |
1454 | ||
1455 | special_symbol_handling (); | |
1456 | } | |
1457 | } | |
c906108c SS |
1458 | } |
1459 | ||
07cd4b97 | 1460 | |
c906108c SS |
1461 | /* |
1462 | ||
c5aa993b | 1463 | LOCAL FUNCTION |
c906108c | 1464 | |
c5aa993b | 1465 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 1466 | |
c5aa993b | 1467 | SYNOPSIS |
c906108c | 1468 | |
c5aa993b | 1469 | static void info_sharedlibrary_command () |
c906108c | 1470 | |
c5aa993b | 1471 | DESCRIPTION |
c906108c | 1472 | |
c5aa993b JM |
1473 | Walk through the shared library list and print information |
1474 | about each attached library. | |
1475 | */ | |
c906108c SS |
1476 | |
1477 | static void | |
1478 | info_sharedlibrary_command (ignore, from_tty) | |
1479 | char *ignore; | |
1480 | int from_tty; | |
1481 | { | |
c5aa993b | 1482 | register struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
1483 | int header_done = 0; |
1484 | int addr_width; | |
1485 | char *addr_fmt; | |
f5b8946c | 1486 | int arch_size; |
c906108c SS |
1487 | |
1488 | if (exec_bfd == NULL) | |
1489 | { | |
4ce44c66 | 1490 | printf_unfiltered ("No executable file.\n"); |
c906108c SS |
1491 | return; |
1492 | } | |
1493 | ||
6ceadee4 | 1494 | arch_size = bfd_get_arch_size (exec_bfd); |
f5b8946c MS |
1495 | /* Default to 32-bit in case of failure (non-elf). */ |
1496 | if (arch_size == 32 || arch_size == -1) | |
1497 | { | |
1498 | addr_width = 8 + 4; | |
1499 | addr_fmt = "08l"; | |
1500 | } | |
1501 | else if (arch_size == 64) | |
1502 | { | |
1503 | addr_width = 16 + 4; | |
1504 | addr_fmt = "016l"; | |
1505 | } | |
c906108c | 1506 | |
105b175f | 1507 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
1508 | |
1509 | for (so = so_list_head; so; so = so->next) | |
c906108c | 1510 | { |
c5aa993b | 1511 | if (so->so_name[0]) |
c906108c SS |
1512 | { |
1513 | if (!header_done) | |
1514 | { | |
c5aa993b JM |
1515 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
1516 | addr_width, "To", "Syms Read", | |
1517 | "Shared Object Library"); | |
c906108c SS |
1518 | header_done++; |
1519 | } | |
1520 | ||
1521 | printf_unfiltered ("%-*s", addr_width, | |
c5aa993b JM |
1522 | local_hex_string_custom ((unsigned long) LM_ADDR (so), |
1523 | addr_fmt)); | |
c906108c | 1524 | printf_unfiltered ("%-*s", addr_width, |
c5aa993b JM |
1525 | local_hex_string_custom ((unsigned long) so->lmend, |
1526 | addr_fmt)); | |
1527 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); | |
1528 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
1529 | } |
1530 | } | |
1531 | if (so_list_head == NULL) | |
1532 | { | |
c5aa993b | 1533 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
c906108c SS |
1534 | } |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | ||
c5aa993b | 1539 | GLOBAL FUNCTION |
c906108c | 1540 | |
c5aa993b | 1541 | solib_address -- check to see if an address is in a shared lib |
c906108c | 1542 | |
c5aa993b | 1543 | SYNOPSIS |
c906108c | 1544 | |
c5aa993b | 1545 | char * solib_address (CORE_ADDR address) |
c906108c | 1546 | |
c5aa993b | 1547 | DESCRIPTION |
c906108c | 1548 | |
c5aa993b JM |
1549 | Provides a hook for other gdb routines to discover whether or |
1550 | not a particular address is within the mapped address space of | |
1551 | a shared library. Any address between the base mapping address | |
1552 | and the first address beyond the end of the last mapping, is | |
1553 | considered to be within the shared library address space, for | |
1554 | our purposes. | |
c906108c | 1555 | |
c5aa993b JM |
1556 | For example, this routine is called at one point to disable |
1557 | breakpoints which are in shared libraries that are not currently | |
1558 | mapped in. | |
c906108c SS |
1559 | */ |
1560 | ||
1561 | char * | |
1562 | solib_address (address) | |
1563 | CORE_ADDR address; | |
1564 | { | |
c5aa993b JM |
1565 | register struct so_list *so = 0; /* link map state variable */ |
1566 | ||
07cd4b97 | 1567 | for (so = so_list_head; so; so = so->next) |
c906108c | 1568 | { |
07cd4b97 JB |
1569 | if (LM_ADDR (so) <= address && address < so->lmend) |
1570 | return (so->so_name); | |
c906108c | 1571 | } |
07cd4b97 | 1572 | |
c906108c SS |
1573 | return (0); |
1574 | } | |
1575 | ||
1576 | /* Called by free_all_symtabs */ | |
1577 | ||
c5aa993b | 1578 | void |
085dd6e6 | 1579 | clear_solib () |
c906108c | 1580 | { |
085dd6e6 JM |
1581 | /* This function is expected to handle ELF shared libraries. It is |
1582 | also used on Solaris, which can run either ELF or a.out binaries | |
1583 | (for compatibility with SunOS 4), both of which can use shared | |
1584 | libraries. So we don't know whether we have an ELF executable or | |
1585 | an a.out executable until the user chooses an executable file. | |
1586 | ||
1587 | ELF shared libraries don't get mapped into the address space | |
1588 | until after the program starts, so we'd better not try to insert | |
1589 | breakpoints in them immediately. We have to wait until the | |
1590 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
1591 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
1592 | it's ready. | |
1593 | ||
1594 | SunOS shared libraries seem to be different --- they're present | |
1595 | as soon as the process begins execution, so there's no need to | |
1596 | put off inserting breakpoints. There's also nowhere to put a | |
1597 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
1598 | around to it. | |
1599 | ||
1600 | So: disable breakpoints only if we're using ELF shared libs. */ | |
1601 | if (exec_bfd != NULL | |
1602 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
1603 | disable_breakpoints_in_shlibs (1); | |
1604 | ||
c906108c SS |
1605 | while (so_list_head) |
1606 | { | |
07cd4b97 JB |
1607 | struct so_list *so = so_list_head; |
1608 | so_list_head = so->next; | |
1609 | free_so (so); | |
c906108c | 1610 | } |
07cd4b97 | 1611 | |
c906108c SS |
1612 | debug_base = 0; |
1613 | } | |
1614 | ||
1615 | static void | |
1616 | do_clear_solib (dummy) | |
1617 | PTR dummy; | |
1618 | { | |
1619 | solib_cleanup_queued = 0; | |
1620 | clear_solib (); | |
1621 | } | |
1622 | ||
1623 | #ifdef SVR4_SHARED_LIBS | |
1624 | ||
1625 | /* Return 1 if PC lies in the dynamic symbol resolution code of the | |
1626 | SVR4 run time loader. */ | |
1627 | ||
1628 | static CORE_ADDR interp_text_sect_low; | |
1629 | static CORE_ADDR interp_text_sect_high; | |
1630 | static CORE_ADDR interp_plt_sect_low; | |
1631 | static CORE_ADDR interp_plt_sect_high; | |
1632 | ||
1633 | int | |
1634 | in_svr4_dynsym_resolve_code (pc) | |
1635 | CORE_ADDR pc; | |
1636 | { | |
1637 | return ((pc >= interp_text_sect_low && pc < interp_text_sect_high) | |
1638 | || (pc >= interp_plt_sect_low && pc < interp_plt_sect_high) | |
1639 | || in_plt_section (pc, NULL)); | |
1640 | } | |
1641 | #endif | |
1642 | ||
1643 | /* | |
1644 | ||
c5aa993b | 1645 | LOCAL FUNCTION |
c906108c | 1646 | |
c5aa993b | 1647 | disable_break -- remove the "mapping changed" breakpoint |
c906108c | 1648 | |
c5aa993b | 1649 | SYNOPSIS |
c906108c | 1650 | |
c5aa993b | 1651 | static int disable_break () |
c906108c | 1652 | |
c5aa993b | 1653 | DESCRIPTION |
c906108c | 1654 | |
c5aa993b JM |
1655 | Removes the breakpoint that gets hit when the dynamic linker |
1656 | completes a mapping change. | |
c906108c | 1657 | |
c5aa993b | 1658 | */ |
c906108c SS |
1659 | |
1660 | #ifndef SVR4_SHARED_LIBS | |
1661 | ||
1662 | static int | |
1663 | disable_break () | |
1664 | { | |
1665 | int status = 1; | |
1666 | ||
1667 | #ifndef SVR4_SHARED_LIBS | |
1668 | ||
1669 | int in_debugger = 0; | |
c5aa993b | 1670 | |
c906108c SS |
1671 | /* Read the debugger structure from the inferior to retrieve the |
1672 | address of the breakpoint and the original contents of the | |
1673 | breakpoint address. Remove the breakpoint by writing the original | |
1674 | contents back. */ | |
1675 | ||
1676 | read_memory (debug_addr, (char *) &debug_copy, sizeof (debug_copy)); | |
1677 | ||
1678 | /* Set `in_debugger' to zero now. */ | |
1679 | ||
1680 | write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger)); | |
1681 | ||
07cd4b97 | 1682 | breakpoint_addr = SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_bp_addr); |
c906108c SS |
1683 | write_memory (breakpoint_addr, (char *) &debug_copy.ldd_bp_inst, |
1684 | sizeof (debug_copy.ldd_bp_inst)); | |
1685 | ||
c5aa993b | 1686 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
1687 | |
1688 | /* Note that breakpoint address and original contents are in our address | |
1689 | space, so we just need to write the original contents back. */ | |
1690 | ||
1691 | if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0) | |
1692 | { | |
1693 | status = 0; | |
1694 | } | |
1695 | ||
c5aa993b | 1696 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
1697 | |
1698 | /* For the SVR4 version, we always know the breakpoint address. For the | |
1699 | SunOS version we don't know it until the above code is executed. | |
1700 | Grumble if we are stopped anywhere besides the breakpoint address. */ | |
1701 | ||
1702 | if (stop_pc != breakpoint_addr) | |
1703 | { | |
1704 | warning ("stopped at unknown breakpoint while handling shared libraries"); | |
1705 | } | |
1706 | ||
1707 | return (status); | |
1708 | } | |
1709 | ||
c5aa993b | 1710 | #endif /* #ifdef SVR4_SHARED_LIBS */ |
c906108c SS |
1711 | |
1712 | /* | |
1713 | ||
c5aa993b JM |
1714 | LOCAL FUNCTION |
1715 | ||
1716 | enable_break -- arrange for dynamic linker to hit breakpoint | |
1717 | ||
1718 | SYNOPSIS | |
1719 | ||
1720 | int enable_break (void) | |
1721 | ||
1722 | DESCRIPTION | |
1723 | ||
1724 | Both the SunOS and the SVR4 dynamic linkers have, as part of their | |
1725 | debugger interface, support for arranging for the inferior to hit | |
1726 | a breakpoint after mapping in the shared libraries. This function | |
1727 | enables that breakpoint. | |
1728 | ||
1729 | For SunOS, there is a special flag location (in_debugger) which we | |
1730 | set to 1. When the dynamic linker sees this flag set, it will set | |
1731 | a breakpoint at a location known only to itself, after saving the | |
1732 | original contents of that place and the breakpoint address itself, | |
1733 | in it's own internal structures. When we resume the inferior, it | |
1734 | will eventually take a SIGTRAP when it runs into the breakpoint. | |
1735 | We handle this (in a different place) by restoring the contents of | |
1736 | the breakpointed location (which is only known after it stops), | |
1737 | chasing around to locate the shared libraries that have been | |
1738 | loaded, then resuming. | |
1739 | ||
1740 | For SVR4, the debugger interface structure contains a member (r_brk) | |
1741 | which is statically initialized at the time the shared library is | |
1742 | built, to the offset of a function (_r_debug_state) which is guaran- | |
1743 | teed to be called once before mapping in a library, and again when | |
1744 | the mapping is complete. At the time we are examining this member, | |
1745 | it contains only the unrelocated offset of the function, so we have | |
1746 | to do our own relocation. Later, when the dynamic linker actually | |
1747 | runs, it relocates r_brk to be the actual address of _r_debug_state(). | |
1748 | ||
1749 | The debugger interface structure also contains an enumeration which | |
1750 | is set to either RT_ADD or RT_DELETE prior to changing the mapping, | |
1751 | depending upon whether or not the library is being mapped or unmapped, | |
1752 | and then set to RT_CONSISTENT after the library is mapped/unmapped. | |
1753 | */ | |
c906108c SS |
1754 | |
1755 | static int | |
1756 | enable_break () | |
1757 | { | |
1758 | int success = 0; | |
1759 | ||
1760 | #ifndef SVR4_SHARED_LIBS | |
1761 | ||
1762 | int j; | |
1763 | int in_debugger; | |
1764 | ||
1765 | /* Get link_dynamic structure */ | |
1766 | ||
1767 | j = target_read_memory (debug_base, (char *) &dynamic_copy, | |
1768 | sizeof (dynamic_copy)); | |
1769 | if (j) | |
1770 | { | |
1771 | /* unreadable */ | |
1772 | return (0); | |
1773 | } | |
1774 | ||
1775 | /* Calc address of debugger interface structure */ | |
1776 | ||
07cd4b97 | 1777 | debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd); |
c906108c SS |
1778 | |
1779 | /* Calc address of `in_debugger' member of debugger interface structure */ | |
1780 | ||
1781 | flag_addr = debug_addr + (CORE_ADDR) ((char *) &debug_copy.ldd_in_debugger - | |
1782 | (char *) &debug_copy); | |
1783 | ||
1784 | /* Write a value of 1 to this member. */ | |
1785 | ||
1786 | in_debugger = 1; | |
1787 | write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger)); | |
1788 | success = 1; | |
1789 | ||
c5aa993b | 1790 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
1791 | |
1792 | #ifdef BKPT_AT_SYMBOL | |
1793 | ||
1794 | struct minimal_symbol *msymbol; | |
1795 | char **bkpt_namep; | |
1796 | asection *interp_sect; | |
1797 | ||
1798 | /* First, remove all the solib event breakpoints. Their addresses | |
1799 | may have changed since the last time we ran the program. */ | |
1800 | remove_solib_event_breakpoints (); | |
1801 | ||
1802 | #ifdef SVR4_SHARED_LIBS | |
1803 | interp_text_sect_low = interp_text_sect_high = 0; | |
1804 | interp_plt_sect_low = interp_plt_sect_high = 0; | |
1805 | ||
1806 | /* Find the .interp section; if not found, warn the user and drop | |
1807 | into the old breakpoint at symbol code. */ | |
1808 | interp_sect = bfd_get_section_by_name (exec_bfd, ".interp"); | |
1809 | if (interp_sect) | |
1810 | { | |
1811 | unsigned int interp_sect_size; | |
1812 | char *buf; | |
1813 | CORE_ADDR load_addr; | |
1814 | bfd *tmp_bfd; | |
1815 | CORE_ADDR sym_addr = 0; | |
1816 | ||
1817 | /* Read the contents of the .interp section into a local buffer; | |
c5aa993b | 1818 | the contents specify the dynamic linker this program uses. */ |
c906108c SS |
1819 | interp_sect_size = bfd_section_size (exec_bfd, interp_sect); |
1820 | buf = alloca (interp_sect_size); | |
1821 | bfd_get_section_contents (exec_bfd, interp_sect, | |
1822 | buf, 0, interp_sect_size); | |
1823 | ||
1824 | /* Now we need to figure out where the dynamic linker was | |
c5aa993b JM |
1825 | loaded so that we can load its symbols and place a breakpoint |
1826 | in the dynamic linker itself. | |
c906108c | 1827 | |
c5aa993b JM |
1828 | This address is stored on the stack. However, I've been unable |
1829 | to find any magic formula to find it for Solaris (appears to | |
1830 | be trivial on GNU/Linux). Therefore, we have to try an alternate | |
1831 | mechanism to find the dynamic linker's base address. */ | |
c906108c SS |
1832 | tmp_bfd = bfd_openr (buf, gnutarget); |
1833 | if (tmp_bfd == NULL) | |
1834 | goto bkpt_at_symbol; | |
1835 | ||
1836 | /* Make sure the dynamic linker's really a useful object. */ | |
1837 | if (!bfd_check_format (tmp_bfd, bfd_object)) | |
1838 | { | |
1839 | warning ("Unable to grok dynamic linker %s as an object file", buf); | |
1840 | bfd_close (tmp_bfd); | |
1841 | goto bkpt_at_symbol; | |
1842 | } | |
1843 | ||
1844 | /* We find the dynamic linker's base address by examining the | |
c5aa993b JM |
1845 | current pc (which point at the entry point for the dynamic |
1846 | linker) and subtracting the offset of the entry point. */ | |
c906108c SS |
1847 | load_addr = read_pc () - tmp_bfd->start_address; |
1848 | ||
1849 | /* Record the relocated start and end address of the dynamic linker | |
c5aa993b | 1850 | text and plt section for in_svr4_dynsym_resolve_code. */ |
c906108c SS |
1851 | interp_sect = bfd_get_section_by_name (tmp_bfd, ".text"); |
1852 | if (interp_sect) | |
1853 | { | |
1854 | interp_text_sect_low = | |
1855 | bfd_section_vma (tmp_bfd, interp_sect) + load_addr; | |
1856 | interp_text_sect_high = | |
1857 | interp_text_sect_low + bfd_section_size (tmp_bfd, interp_sect); | |
1858 | } | |
1859 | interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt"); | |
1860 | if (interp_sect) | |
1861 | { | |
1862 | interp_plt_sect_low = | |
1863 | bfd_section_vma (tmp_bfd, interp_sect) + load_addr; | |
1864 | interp_plt_sect_high = | |
1865 | interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect); | |
1866 | } | |
1867 | ||
1868 | /* Now try to set a breakpoint in the dynamic linker. */ | |
1869 | for (bkpt_namep = solib_break_names; *bkpt_namep != NULL; bkpt_namep++) | |
1870 | { | |
1871 | sym_addr = bfd_lookup_symbol (tmp_bfd, *bkpt_namep); | |
1872 | if (sym_addr != 0) | |
1873 | break; | |
1874 | } | |
1875 | ||
1876 | /* We're done with the temporary bfd. */ | |
1877 | bfd_close (tmp_bfd); | |
1878 | ||
1879 | if (sym_addr != 0) | |
1880 | { | |
1881 | create_solib_event_breakpoint (load_addr + sym_addr); | |
1882 | return 1; | |
1883 | } | |
1884 | ||
1885 | /* For whatever reason we couldn't set a breakpoint in the dynamic | |
c5aa993b JM |
1886 | linker. Warn and drop into the old code. */ |
1887 | bkpt_at_symbol: | |
c906108c SS |
1888 | warning ("Unable to find dynamic linker breakpoint function.\nGDB will be unable to debug shared library initializers\nand track explicitly loaded dynamic code."); |
1889 | } | |
1890 | #endif | |
1891 | ||
1892 | /* Scan through the list of symbols, trying to look up the symbol and | |
1893 | set a breakpoint there. Terminate loop when we/if we succeed. */ | |
1894 | ||
1895 | breakpoint_addr = 0; | |
1896 | for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++) | |
1897 | { | |
1898 | msymbol = lookup_minimal_symbol (*bkpt_namep, NULL, symfile_objfile); | |
1899 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) | |
1900 | { | |
1901 | create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol)); | |
1902 | return 1; | |
1903 | } | |
1904 | } | |
1905 | ||
1906 | /* Nothing good happened. */ | |
1907 | success = 0; | |
1908 | ||
c5aa993b | 1909 | #endif /* BKPT_AT_SYMBOL */ |
c906108c | 1910 | |
c5aa993b | 1911 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
1912 | |
1913 | return (success); | |
1914 | } | |
c5aa993b | 1915 | |
c906108c | 1916 | /* |
c5aa993b JM |
1917 | |
1918 | GLOBAL FUNCTION | |
1919 | ||
1920 | solib_create_inferior_hook -- shared library startup support | |
1921 | ||
1922 | SYNOPSIS | |
1923 | ||
1924 | void solib_create_inferior_hook() | |
1925 | ||
1926 | DESCRIPTION | |
1927 | ||
1928 | When gdb starts up the inferior, it nurses it along (through the | |
1929 | shell) until it is ready to execute it's first instruction. At this | |
1930 | point, this function gets called via expansion of the macro | |
1931 | SOLIB_CREATE_INFERIOR_HOOK. | |
1932 | ||
1933 | For SunOS executables, this first instruction is typically the | |
1934 | one at "_start", or a similar text label, regardless of whether | |
1935 | the executable is statically or dynamically linked. The runtime | |
1936 | startup code takes care of dynamically linking in any shared | |
1937 | libraries, once gdb allows the inferior to continue. | |
1938 | ||
1939 | For SVR4 executables, this first instruction is either the first | |
1940 | instruction in the dynamic linker (for dynamically linked | |
1941 | executables) or the instruction at "start" for statically linked | |
1942 | executables. For dynamically linked executables, the system | |
1943 | first exec's /lib/libc.so.N, which contains the dynamic linker, | |
1944 | and starts it running. The dynamic linker maps in any needed | |
1945 | shared libraries, maps in the actual user executable, and then | |
1946 | jumps to "start" in the user executable. | |
1947 | ||
1948 | For both SunOS shared libraries, and SVR4 shared libraries, we | |
1949 | can arrange to cooperate with the dynamic linker to discover the | |
1950 | names of shared libraries that are dynamically linked, and the | |
1951 | base addresses to which they are linked. | |
1952 | ||
1953 | This function is responsible for discovering those names and | |
1954 | addresses, and saving sufficient information about them to allow | |
1955 | their symbols to be read at a later time. | |
1956 | ||
1957 | FIXME | |
1958 | ||
1959 | Between enable_break() and disable_break(), this code does not | |
1960 | properly handle hitting breakpoints which the user might have | |
1961 | set in the startup code or in the dynamic linker itself. Proper | |
1962 | handling will probably have to wait until the implementation is | |
1963 | changed to use the "breakpoint handler function" method. | |
1964 | ||
1965 | Also, what if child has exit()ed? Must exit loop somehow. | |
1966 | */ | |
1967 | ||
1968 | void | |
1969 | solib_create_inferior_hook () | |
c906108c SS |
1970 | { |
1971 | /* If we are using the BKPT_AT_SYMBOL code, then we don't need the base | |
1972 | yet. In fact, in the case of a SunOS4 executable being run on | |
07cd4b97 | 1973 | Solaris, we can't get it yet. current_sos will get it when it needs |
c906108c SS |
1974 | it. */ |
1975 | #if !(defined (SVR4_SHARED_LIBS) && defined (BKPT_AT_SYMBOL)) | |
1976 | if ((debug_base = locate_base ()) == 0) | |
1977 | { | |
1978 | /* Can't find the symbol or the executable is statically linked. */ | |
1979 | return; | |
1980 | } | |
1981 | #endif | |
1982 | ||
1983 | if (!enable_break ()) | |
1984 | { | |
1985 | warning ("shared library handler failed to enable breakpoint"); | |
1986 | return; | |
1987 | } | |
1988 | ||
1989 | #if !defined(SVR4_SHARED_LIBS) || defined(_SCO_DS) | |
1990 | /* SCO and SunOS need the loop below, other systems should be using the | |
1991 | special shared library breakpoints and the shared library breakpoint | |
1992 | service routine. | |
1993 | ||
1994 | Now run the target. It will eventually hit the breakpoint, at | |
1995 | which point all of the libraries will have been mapped in and we | |
1996 | can go groveling around in the dynamic linker structures to find | |
1997 | out what we need to know about them. */ | |
1998 | ||
1999 | clear_proceed_status (); | |
2000 | stop_soon_quietly = 1; | |
2001 | stop_signal = TARGET_SIGNAL_0; | |
2002 | do | |
2003 | { | |
2004 | target_resume (-1, 0, stop_signal); | |
2005 | wait_for_inferior (); | |
2006 | } | |
2007 | while (stop_signal != TARGET_SIGNAL_TRAP); | |
2008 | stop_soon_quietly = 0; | |
2009 | ||
2010 | #if !defined(_SCO_DS) | |
2011 | /* We are now either at the "mapping complete" breakpoint (or somewhere | |
2012 | else, a condition we aren't prepared to deal with anyway), so adjust | |
2013 | the PC as necessary after a breakpoint, disable the breakpoint, and | |
2014 | add any shared libraries that were mapped in. */ | |
2015 | ||
2016 | if (DECR_PC_AFTER_BREAK) | |
2017 | { | |
2018 | stop_pc -= DECR_PC_AFTER_BREAK; | |
2019 | write_register (PC_REGNUM, stop_pc); | |
2020 | } | |
2021 | ||
2022 | if (!disable_break ()) | |
2023 | { | |
2024 | warning ("shared library handler failed to disable breakpoint"); | |
2025 | } | |
2026 | ||
2027 | if (auto_solib_add) | |
2028 | solib_add ((char *) 0, 0, (struct target_ops *) 0); | |
2029 | #endif /* ! _SCO_DS */ | |
2030 | #endif | |
2031 | } | |
2032 | ||
2033 | /* | |
2034 | ||
c5aa993b | 2035 | LOCAL FUNCTION |
c906108c | 2036 | |
c5aa993b | 2037 | special_symbol_handling -- additional shared library symbol handling |
c906108c | 2038 | |
c5aa993b | 2039 | SYNOPSIS |
c906108c | 2040 | |
07cd4b97 | 2041 | void special_symbol_handling () |
c906108c | 2042 | |
c5aa993b | 2043 | DESCRIPTION |
c906108c | 2044 | |
c5aa993b JM |
2045 | Once the symbols from a shared object have been loaded in the usual |
2046 | way, we are called to do any system specific symbol handling that | |
2047 | is needed. | |
c906108c | 2048 | |
c5aa993b JM |
2049 | For SunOS4, this consists of grunging around in the dynamic |
2050 | linkers structures to find symbol definitions for "common" symbols | |
2051 | and adding them to the minimal symbol table for the runtime common | |
2052 | objfile. | |
c906108c | 2053 | |
c5aa993b | 2054 | */ |
c906108c SS |
2055 | |
2056 | static void | |
07cd4b97 | 2057 | special_symbol_handling () |
c906108c SS |
2058 | { |
2059 | #ifndef SVR4_SHARED_LIBS | |
2060 | int j; | |
2061 | ||
2062 | if (debug_addr == 0) | |
2063 | { | |
2064 | /* Get link_dynamic structure */ | |
2065 | ||
2066 | j = target_read_memory (debug_base, (char *) &dynamic_copy, | |
2067 | sizeof (dynamic_copy)); | |
2068 | if (j) | |
2069 | { | |
2070 | /* unreadable */ | |
2071 | return; | |
2072 | } | |
2073 | ||
2074 | /* Calc address of debugger interface structure */ | |
2075 | /* FIXME, this needs work for cross-debugging of core files | |
c5aa993b | 2076 | (byteorder, size, alignment, etc). */ |
c906108c | 2077 | |
07cd4b97 | 2078 | debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd); |
c906108c SS |
2079 | } |
2080 | ||
2081 | /* Read the debugger structure from the inferior, just to make sure | |
2082 | we have a current copy. */ | |
2083 | ||
2084 | j = target_read_memory (debug_addr, (char *) &debug_copy, | |
2085 | sizeof (debug_copy)); | |
2086 | if (j) | |
c5aa993b | 2087 | return; /* unreadable */ |
c906108c SS |
2088 | |
2089 | /* Get common symbol definitions for the loaded object. */ | |
2090 | ||
2091 | if (debug_copy.ldd_cp) | |
2092 | { | |
07cd4b97 | 2093 | solib_add_common_symbols (SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_cp)); |
c906108c SS |
2094 | } |
2095 | ||
c5aa993b | 2096 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
2097 | } |
2098 | ||
2099 | ||
2100 | /* | |
2101 | ||
c5aa993b | 2102 | LOCAL FUNCTION |
c906108c | 2103 | |
c5aa993b | 2104 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 2105 | |
c5aa993b | 2106 | SYNOPSIS |
c906108c | 2107 | |
c5aa993b | 2108 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 2109 | |
c5aa993b | 2110 | DESCRIPTION |
c906108c | 2111 | |
c5aa993b | 2112 | */ |
c906108c SS |
2113 | |
2114 | static void | |
2115 | sharedlibrary_command (args, from_tty) | |
c5aa993b JM |
2116 | char *args; |
2117 | int from_tty; | |
c906108c SS |
2118 | { |
2119 | dont_repeat (); | |
2120 | solib_add (args, from_tty, (struct target_ops *) 0); | |
2121 | } | |
2122 | ||
2123 | #endif /* HAVE_LINK_H */ | |
2124 | ||
2125 | void | |
c5aa993b | 2126 | _initialize_solib () |
c906108c SS |
2127 | { |
2128 | #ifdef HAVE_LINK_H | |
2129 | ||
2130 | add_com ("sharedlibrary", class_files, sharedlibrary_command, | |
2131 | "Load shared object library symbols for files matching REGEXP."); | |
c5aa993b | 2132 | add_info ("sharedlibrary", info_sharedlibrary_command, |
c906108c SS |
2133 | "Status of loaded shared object libraries."); |
2134 | ||
2135 | add_show_from_set | |
2136 | (add_set_cmd ("auto-solib-add", class_support, var_zinteger, | |
2137 | (char *) &auto_solib_add, | |
2138 | "Set autoloading of shared library symbols.\n\ | |
2139 | If nonzero, symbols from all shared object libraries will be loaded\n\ | |
2140 | automatically when the inferior begins execution or when the dynamic linker\n\ | |
2141 | informs gdb that a new library has been loaded. Otherwise, symbols\n\ | |
2142 | must be loaded manually, using `sharedlibrary'.", | |
2143 | &setlist), | |
2144 | &showlist); | |
2145 | ||
2146 | add_show_from_set | |
2147 | (add_set_cmd ("solib-absolute-prefix", class_support, var_filename, | |
2148 | (char *) &solib_absolute_prefix, | |
2149 | "Set prefix for loading absolute shared library symbol files.\n\ | |
2150 | For other (relative) files, you can add values using `set solib-search-path'.", | |
2151 | &setlist), | |
2152 | &showlist); | |
2153 | add_show_from_set | |
2154 | (add_set_cmd ("solib-search-path", class_support, var_string, | |
2155 | (char *) &solib_search_path, | |
2156 | "Set the search path for loading non-absolute shared library symbol files.\n\ | |
2157 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.", | |
2158 | &setlist), | |
2159 | &showlist); | |
2160 | ||
2161 | #endif /* HAVE_LINK_H */ | |
2162 | } |