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 | |
fba45db2 | 268 | solib_map_sections (PTR arg) |
c906108c SS |
269 | { |
270 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
271 | char *filename; | |
272 | char *scratch_pathname; | |
273 | int scratch_chan; | |
274 | struct section_table *p; | |
275 | struct cleanup *old_chain; | |
276 | bfd *abfd; | |
c5aa993b JM |
277 | |
278 | filename = tilde_expand (so->so_name); | |
279 | ||
c906108c SS |
280 | if (solib_absolute_prefix && ROOTED_P (filename)) |
281 | /* Prefix shared libraries with absolute filenames with | |
282 | SOLIB_ABSOLUTE_PREFIX. */ | |
283 | { | |
284 | char *pfxed_fn; | |
285 | int pfx_len; | |
286 | ||
287 | pfx_len = strlen (solib_absolute_prefix); | |
288 | ||
289 | /* Remove trailing slashes. */ | |
290 | while (pfx_len > 0 && SLASH_P (solib_absolute_prefix[pfx_len - 1])) | |
291 | pfx_len--; | |
292 | ||
293 | pfxed_fn = xmalloc (pfx_len + strlen (filename) + 1); | |
294 | strcpy (pfxed_fn, solib_absolute_prefix); | |
295 | strcat (pfxed_fn, filename); | |
296 | free (filename); | |
297 | ||
298 | filename = pfxed_fn; | |
299 | } | |
300 | ||
301 | old_chain = make_cleanup (free, filename); | |
302 | ||
303 | scratch_chan = -1; | |
304 | ||
305 | if (solib_search_path) | |
306 | scratch_chan = openp (solib_search_path, | |
307 | 1, filename, O_RDONLY, 0, &scratch_pathname); | |
308 | if (scratch_chan < 0) | |
c5aa993b | 309 | scratch_chan = openp (get_in_environ (inferior_environ, "PATH"), |
c906108c SS |
310 | 1, filename, O_RDONLY, 0, &scratch_pathname); |
311 | if (scratch_chan < 0) | |
312 | { | |
c5aa993b JM |
313 | scratch_chan = openp (get_in_environ |
314 | (inferior_environ, "LD_LIBRARY_PATH"), | |
c906108c SS |
315 | 1, filename, O_RDONLY, 0, &scratch_pathname); |
316 | } | |
317 | if (scratch_chan < 0) | |
318 | { | |
319 | perror_with_name (filename); | |
320 | } | |
321 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ | |
322 | ||
323 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); | |
324 | if (!abfd) | |
325 | { | |
326 | close (scratch_chan); | |
327 | error ("Could not open `%s' as an executable file: %s", | |
328 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
329 | } | |
330 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ | |
c5aa993b JM |
331 | so->abfd = abfd; |
332 | abfd->cacheable = true; | |
c906108c SS |
333 | |
334 | /* copy full path name into so_name, so that later symbol_file_add can find | |
335 | it */ | |
336 | if (strlen (scratch_pathname) >= MAX_PATH_SIZE) | |
337 | error ("Full path name length of shared library exceeds MAX_PATH_SIZE in so_list structure."); | |
338 | strcpy (so->so_name, scratch_pathname); | |
339 | ||
340 | if (!bfd_check_format (abfd, bfd_object)) | |
341 | { | |
342 | error ("\"%s\": not in executable format: %s.", | |
343 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
344 | } | |
c5aa993b | 345 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
c906108c | 346 | { |
c5aa993b | 347 | error ("Can't find the file sections in `%s': %s", |
c906108c SS |
348 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
349 | } | |
350 | ||
c5aa993b | 351 | for (p = so->sections; p < so->sections_end; p++) |
c906108c SS |
352 | { |
353 | /* Relocate the section binding addresses as recorded in the shared | |
c5aa993b JM |
354 | object's file by the base address to which the object was actually |
355 | mapped. */ | |
07cd4b97 JB |
356 | p->addr += LM_ADDR (so); |
357 | p->endaddr += LM_ADDR (so); | |
358 | so->lmend = max (p->endaddr, so->lmend); | |
c5aa993b | 359 | if (STREQ (p->the_bfd_section->name, ".text")) |
c906108c | 360 | { |
c5aa993b | 361 | so->textsection = p; |
c906108c SS |
362 | } |
363 | } | |
364 | ||
365 | /* Free the file names, close the file now. */ | |
366 | do_cleanups (old_chain); | |
367 | ||
368 | return (1); | |
369 | } | |
370 | ||
371 | #ifndef SVR4_SHARED_LIBS | |
372 | ||
373 | /* Allocate the runtime common object file. */ | |
374 | ||
375 | static void | |
fba45db2 | 376 | allocate_rt_common_objfile (void) |
c906108c SS |
377 | { |
378 | struct objfile *objfile; | |
379 | struct objfile *last_one; | |
380 | ||
381 | objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); | |
382 | memset (objfile, 0, sizeof (struct objfile)); | |
c5aa993b JM |
383 | objfile->md = NULL; |
384 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
c906108c | 385 | xmalloc, free); |
c5aa993b | 386 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
c906108c | 387 | free); |
c5aa993b | 388 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
c906108c | 389 | free); |
c5aa993b | 390 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
c906108c | 391 | free); |
c5aa993b | 392 | objfile->name = mstrsave (objfile->md, "rt_common"); |
c906108c SS |
393 | |
394 | /* Add this file onto the tail of the linked list of other such files. */ | |
395 | ||
c5aa993b | 396 | objfile->next = NULL; |
c906108c SS |
397 | if (object_files == NULL) |
398 | object_files = objfile; | |
399 | else | |
400 | { | |
401 | for (last_one = object_files; | |
c5aa993b JM |
402 | last_one->next; |
403 | last_one = last_one->next); | |
404 | last_one->next = objfile; | |
c906108c SS |
405 | } |
406 | ||
407 | rt_common_objfile = objfile; | |
408 | } | |
409 | ||
410 | /* Read all dynamically loaded common symbol definitions from the inferior | |
411 | and put them into the minimal symbol table for the runtime common | |
412 | objfile. */ | |
413 | ||
414 | static void | |
fba45db2 | 415 | solib_add_common_symbols (CORE_ADDR rtc_symp) |
c906108c SS |
416 | { |
417 | struct rtc_symb inferior_rtc_symb; | |
418 | struct nlist inferior_rtc_nlist; | |
419 | int len; | |
420 | char *name; | |
421 | ||
422 | /* Remove any runtime common symbols from previous runs. */ | |
423 | ||
c5aa993b | 424 | if (rt_common_objfile != NULL && rt_common_objfile->minimal_symbol_count) |
c906108c | 425 | { |
c5aa993b JM |
426 | obstack_free (&rt_common_objfile->symbol_obstack, 0); |
427 | obstack_specify_allocation (&rt_common_objfile->symbol_obstack, 0, 0, | |
c906108c | 428 | xmalloc, free); |
c5aa993b JM |
429 | rt_common_objfile->minimal_symbol_count = 0; |
430 | rt_common_objfile->msymbols = NULL; | |
c906108c SS |
431 | } |
432 | ||
433 | init_minimal_symbol_collection (); | |
56e290f4 | 434 | make_cleanup_discard_minimal_symbols (); |
c906108c SS |
435 | |
436 | while (rtc_symp) | |
437 | { | |
07cd4b97 | 438 | read_memory (rtc_symp, |
c906108c SS |
439 | (char *) &inferior_rtc_symb, |
440 | sizeof (inferior_rtc_symb)); | |
07cd4b97 | 441 | read_memory (SOLIB_EXTRACT_ADDRESS (inferior_rtc_symb.rtc_sp), |
c906108c | 442 | (char *) &inferior_rtc_nlist, |
c5aa993b | 443 | sizeof (inferior_rtc_nlist)); |
c906108c SS |
444 | if (inferior_rtc_nlist.n_type == N_COMM) |
445 | { | |
446 | /* FIXME: The length of the symbol name is not available, but in the | |
447 | current implementation the common symbol is allocated immediately | |
448 | behind the name of the symbol. */ | |
449 | len = inferior_rtc_nlist.n_value - inferior_rtc_nlist.n_un.n_strx; | |
450 | ||
451 | name = xmalloc (len); | |
07cd4b97 JB |
452 | read_memory (SOLIB_EXTRACT_ADDRESS (inferior_rtc_nlist.n_un.n_name), |
453 | name, len); | |
c906108c SS |
454 | |
455 | /* Allocate the runtime common objfile if necessary. */ | |
456 | if (rt_common_objfile == NULL) | |
457 | allocate_rt_common_objfile (); | |
458 | ||
459 | prim_record_minimal_symbol (name, inferior_rtc_nlist.n_value, | |
460 | mst_bss, rt_common_objfile); | |
461 | free (name); | |
462 | } | |
07cd4b97 | 463 | rtc_symp = SOLIB_EXTRACT_ADDRESS (inferior_rtc_symb.rtc_next); |
c906108c SS |
464 | } |
465 | ||
466 | /* Install any minimal symbols that have been collected as the current | |
467 | minimal symbols for the runtime common objfile. */ | |
468 | ||
469 | install_minimal_symbols (rt_common_objfile); | |
470 | } | |
471 | ||
c5aa993b | 472 | #endif /* SVR4_SHARED_LIBS */ |
c906108c SS |
473 | |
474 | ||
475 | #ifdef SVR4_SHARED_LIBS | |
476 | ||
a14ed312 | 477 | static CORE_ADDR bfd_lookup_symbol (bfd *, char *); |
c906108c SS |
478 | |
479 | /* | |
480 | ||
c5aa993b | 481 | LOCAL FUNCTION |
c906108c | 482 | |
c5aa993b | 483 | bfd_lookup_symbol -- lookup the value for a specific symbol |
c906108c | 484 | |
c5aa993b | 485 | SYNOPSIS |
c906108c | 486 | |
c5aa993b | 487 | CORE_ADDR bfd_lookup_symbol (bfd *abfd, char *symname) |
c906108c | 488 | |
c5aa993b | 489 | DESCRIPTION |
c906108c | 490 | |
c5aa993b JM |
491 | An expensive way to lookup the value of a single symbol for |
492 | bfd's that are only temporary anyway. This is used by the | |
493 | shared library support to find the address of the debugger | |
494 | interface structures in the shared library. | |
c906108c | 495 | |
c5aa993b JM |
496 | Note that 0 is specifically allowed as an error return (no |
497 | such symbol). | |
498 | */ | |
c906108c SS |
499 | |
500 | static CORE_ADDR | |
fba45db2 | 501 | bfd_lookup_symbol (bfd *abfd, char *symname) |
c906108c SS |
502 | { |
503 | unsigned int storage_needed; | |
504 | asymbol *sym; | |
505 | asymbol **symbol_table; | |
506 | unsigned int number_of_symbols; | |
507 | unsigned int i; | |
508 | struct cleanup *back_to; | |
509 | CORE_ADDR symaddr = 0; | |
c5aa993b | 510 | |
c906108c SS |
511 | storage_needed = bfd_get_symtab_upper_bound (abfd); |
512 | ||
513 | if (storage_needed > 0) | |
514 | { | |
515 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
c5aa993b JM |
516 | back_to = make_cleanup (free, (PTR) symbol_table); |
517 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
518 | ||
c906108c SS |
519 | for (i = 0; i < number_of_symbols; i++) |
520 | { | |
521 | sym = *symbol_table++; | |
c5aa993b | 522 | if (STREQ (sym->name, symname)) |
c906108c SS |
523 | { |
524 | /* Bfd symbols are section relative. */ | |
c5aa993b | 525 | symaddr = sym->value + sym->section->vma; |
c906108c SS |
526 | break; |
527 | } | |
528 | } | |
529 | do_cleanups (back_to); | |
530 | } | |
531 | return (symaddr); | |
532 | } | |
533 | ||
534 | #ifdef HANDLE_SVR4_EXEC_EMULATORS | |
535 | ||
536 | /* | |
c5aa993b JM |
537 | Solaris BCP (the part of Solaris which allows it to run SunOS4 |
538 | a.out files) throws in another wrinkle. Solaris does not fill | |
539 | in the usual a.out link map structures when running BCP programs, | |
540 | the only way to get at them is via groping around in the dynamic | |
541 | linker. | |
542 | The dynamic linker and it's structures are located in the shared | |
543 | C library, which gets run as the executable's "interpreter" by | |
544 | the kernel. | |
545 | ||
546 | Note that we can assume nothing about the process state at the time | |
547 | we need to find these structures. We may be stopped on the first | |
548 | instruction of the interpreter (C shared library), the first | |
549 | instruction of the executable itself, or somewhere else entirely | |
550 | (if we attached to the process for example). | |
551 | */ | |
552 | ||
553 | static char *debug_base_symbols[] = | |
554 | { | |
555 | "r_debug", /* Solaris 2.3 */ | |
556 | "_r_debug", /* Solaris 2.1, 2.2 */ | |
c906108c SS |
557 | NULL |
558 | }; | |
559 | ||
a14ed312 | 560 | static int look_for_base (int, CORE_ADDR); |
c906108c SS |
561 | |
562 | /* | |
563 | ||
c5aa993b | 564 | LOCAL FUNCTION |
c906108c | 565 | |
c5aa993b | 566 | look_for_base -- examine file for each mapped address segment |
c906108c | 567 | |
c5aa993b | 568 | SYNOPSYS |
c906108c | 569 | |
c5aa993b | 570 | static int look_for_base (int fd, CORE_ADDR baseaddr) |
c906108c | 571 | |
c5aa993b | 572 | DESCRIPTION |
c906108c | 573 | |
c5aa993b JM |
574 | This function is passed to proc_iterate_over_mappings, which |
575 | causes it to get called once for each mapped address space, with | |
576 | an open file descriptor for the file mapped to that space, and the | |
577 | base address of that mapped space. | |
c906108c | 578 | |
c5aa993b JM |
579 | Our job is to find the debug base symbol in the file that this |
580 | fd is open on, if it exists, and if so, initialize the dynamic | |
581 | linker structure base address debug_base. | |
c906108c | 582 | |
c5aa993b JM |
583 | Note that this is a computationally expensive proposition, since |
584 | we basically have to open a bfd on every call, so we specifically | |
585 | avoid opening the exec file. | |
c906108c SS |
586 | */ |
587 | ||
588 | static int | |
fba45db2 | 589 | look_for_base (int fd, CORE_ADDR baseaddr) |
c906108c SS |
590 | { |
591 | bfd *interp_bfd; | |
592 | CORE_ADDR address = 0; | |
593 | char **symbolp; | |
594 | ||
595 | /* If the fd is -1, then there is no file that corresponds to this | |
596 | mapped memory segment, so skip it. Also, if the fd corresponds | |
597 | to the exec file, skip it as well. */ | |
598 | ||
599 | if (fd == -1 | |
600 | || (exec_bfd != NULL | |
c5aa993b | 601 | && fdmatch (fileno ((FILE *) (exec_bfd->iostream)), fd))) |
c906108c SS |
602 | { |
603 | return (0); | |
604 | } | |
605 | ||
606 | /* Try to open whatever random file this fd corresponds to. Note that | |
607 | we have no way currently to find the filename. Don't gripe about | |
608 | any problems we might have, just fail. */ | |
609 | ||
610 | if ((interp_bfd = bfd_fdopenr ("unnamed", gnutarget, fd)) == NULL) | |
611 | { | |
612 | return (0); | |
613 | } | |
614 | if (!bfd_check_format (interp_bfd, bfd_object)) | |
615 | { | |
616 | /* FIXME-leak: on failure, might not free all memory associated with | |
c5aa993b | 617 | interp_bfd. */ |
c906108c SS |
618 | bfd_close (interp_bfd); |
619 | return (0); | |
620 | } | |
621 | ||
622 | /* Now try to find our debug base symbol in this file, which we at | |
623 | least know to be a valid ELF executable or shared library. */ | |
624 | ||
625 | for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++) | |
626 | { | |
627 | address = bfd_lookup_symbol (interp_bfd, *symbolp); | |
628 | if (address != 0) | |
629 | { | |
630 | break; | |
631 | } | |
632 | } | |
633 | if (address == 0) | |
634 | { | |
635 | /* FIXME-leak: on failure, might not free all memory associated with | |
c5aa993b | 636 | interp_bfd. */ |
c906108c SS |
637 | bfd_close (interp_bfd); |
638 | return (0); | |
639 | } | |
640 | ||
641 | /* Eureka! We found the symbol. But now we may need to relocate it | |
642 | by the base address. If the symbol's value is less than the base | |
643 | address of the shared library, then it hasn't yet been relocated | |
644 | by the dynamic linker, and we have to do it ourself. FIXME: Note | |
645 | that we make the assumption that the first segment that corresponds | |
646 | to the shared library has the base address to which the library | |
647 | was relocated. */ | |
648 | ||
649 | if (address < baseaddr) | |
650 | { | |
651 | address += baseaddr; | |
652 | } | |
653 | debug_base = address; | |
654 | /* FIXME-leak: on failure, might not free all memory associated with | |
655 | interp_bfd. */ | |
656 | bfd_close (interp_bfd); | |
657 | return (1); | |
658 | } | |
659 | #endif /* HANDLE_SVR4_EXEC_EMULATORS */ | |
660 | ||
661 | /* | |
662 | ||
c5aa993b | 663 | LOCAL FUNCTION |
c906108c | 664 | |
c5aa993b JM |
665 | elf_locate_base -- locate the base address of dynamic linker structs |
666 | for SVR4 elf targets. | |
c906108c | 667 | |
c5aa993b | 668 | SYNOPSIS |
c906108c | 669 | |
c5aa993b | 670 | CORE_ADDR elf_locate_base (void) |
c906108c | 671 | |
c5aa993b | 672 | DESCRIPTION |
c906108c | 673 | |
c5aa993b JM |
674 | For SVR4 elf targets the address of the dynamic linker's runtime |
675 | structure is contained within the dynamic info section in the | |
676 | executable file. The dynamic section is also mapped into the | |
677 | inferior address space. Because the runtime loader fills in the | |
678 | real address before starting the inferior, we have to read in the | |
679 | dynamic info section from the inferior address space. | |
680 | If there are any errors while trying to find the address, we | |
681 | silently return 0, otherwise the found address is returned. | |
c906108c SS |
682 | |
683 | */ | |
684 | ||
685 | static CORE_ADDR | |
fba45db2 | 686 | elf_locate_base (void) |
c906108c SS |
687 | { |
688 | sec_ptr dyninfo_sect; | |
689 | int dyninfo_sect_size; | |
690 | CORE_ADDR dyninfo_addr; | |
691 | char *buf; | |
692 | char *bufend; | |
f5b8946c | 693 | int arch_size; |
c906108c SS |
694 | |
695 | /* Find the start address of the .dynamic section. */ | |
696 | dyninfo_sect = bfd_get_section_by_name (exec_bfd, ".dynamic"); | |
697 | if (dyninfo_sect == NULL) | |
698 | return 0; | |
699 | dyninfo_addr = bfd_section_vma (exec_bfd, dyninfo_sect); | |
700 | ||
701 | /* Read in .dynamic section, silently ignore errors. */ | |
702 | dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect); | |
703 | buf = alloca (dyninfo_sect_size); | |
704 | if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size)) | |
705 | return 0; | |
706 | ||
707 | /* Find the DT_DEBUG entry in the the .dynamic section. | |
708 | For mips elf we look for DT_MIPS_RLD_MAP, mips elf apparently has | |
709 | no DT_DEBUG entries. */ | |
f5b8946c | 710 | |
6ceadee4 | 711 | arch_size = bfd_get_arch_size (exec_bfd); |
f5b8946c MS |
712 | if (arch_size == -1) /* failure */ |
713 | return 0; | |
714 | ||
715 | if (arch_size == 32) | |
716 | { /* 32-bit elf */ | |
717 | for (bufend = buf + dyninfo_sect_size; | |
718 | buf < bufend; | |
719 | buf += sizeof (Elf32_External_Dyn)) | |
c906108c | 720 | { |
f5b8946c MS |
721 | Elf32_External_Dyn *x_dynp = (Elf32_External_Dyn *) buf; |
722 | long dyn_tag; | |
723 | CORE_ADDR dyn_ptr; | |
724 | ||
725 | dyn_tag = bfd_h_get_32 (exec_bfd, (bfd_byte *) x_dynp->d_tag); | |
726 | if (dyn_tag == DT_NULL) | |
727 | break; | |
728 | else if (dyn_tag == DT_DEBUG) | |
729 | { | |
730 | dyn_ptr = bfd_h_get_32 (exec_bfd, | |
731 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
732 | return dyn_ptr; | |
733 | } | |
c906108c | 734 | #ifdef DT_MIPS_RLD_MAP |
f5b8946c MS |
735 | else if (dyn_tag == DT_MIPS_RLD_MAP) |
736 | { | |
737 | char pbuf[TARGET_PTR_BIT / HOST_CHAR_BIT]; | |
738 | ||
739 | /* DT_MIPS_RLD_MAP contains a pointer to the address | |
740 | of the dynamic link structure. */ | |
741 | dyn_ptr = bfd_h_get_32 (exec_bfd, | |
742 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
743 | if (target_read_memory (dyn_ptr, pbuf, sizeof (pbuf))) | |
744 | return 0; | |
745 | return extract_unsigned_integer (pbuf, sizeof (pbuf)); | |
746 | } | |
c906108c | 747 | #endif |
f5b8946c | 748 | } |
c906108c | 749 | } |
f5b8946c | 750 | else /* 64-bit elf */ |
c906108c | 751 | { |
f5b8946c MS |
752 | for (bufend = buf + dyninfo_sect_size; |
753 | buf < bufend; | |
754 | buf += sizeof (Elf64_External_Dyn)) | |
c906108c | 755 | { |
f5b8946c MS |
756 | Elf64_External_Dyn *x_dynp = (Elf64_External_Dyn *) buf; |
757 | long dyn_tag; | |
758 | CORE_ADDR dyn_ptr; | |
759 | ||
760 | dyn_tag = bfd_h_get_64 (exec_bfd, (bfd_byte *) x_dynp->d_tag); | |
761 | if (dyn_tag == DT_NULL) | |
762 | break; | |
763 | else if (dyn_tag == DT_DEBUG) | |
764 | { | |
765 | dyn_ptr = bfd_h_get_64 (exec_bfd, | |
766 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
767 | return dyn_ptr; | |
768 | } | |
c906108c SS |
769 | } |
770 | } | |
c906108c SS |
771 | |
772 | /* DT_DEBUG entry not found. */ | |
773 | return 0; | |
774 | } | |
775 | ||
c5aa993b | 776 | #endif /* SVR4_SHARED_LIBS */ |
c906108c SS |
777 | |
778 | /* | |
779 | ||
c5aa993b | 780 | LOCAL FUNCTION |
c906108c | 781 | |
c5aa993b | 782 | locate_base -- locate the base address of dynamic linker structs |
c906108c | 783 | |
c5aa993b | 784 | SYNOPSIS |
c906108c | 785 | |
c5aa993b | 786 | CORE_ADDR locate_base (void) |
c906108c | 787 | |
c5aa993b | 788 | DESCRIPTION |
c906108c | 789 | |
c5aa993b JM |
790 | For both the SunOS and SVR4 shared library implementations, if the |
791 | inferior executable has been linked dynamically, there is a single | |
792 | address somewhere in the inferior's data space which is the key to | |
793 | locating all of the dynamic linker's runtime structures. This | |
794 | address is the value of the debug base symbol. The job of this | |
795 | function is to find and return that address, or to return 0 if there | |
796 | is no such address (the executable is statically linked for example). | |
c906108c | 797 | |
c5aa993b JM |
798 | For SunOS, the job is almost trivial, since the dynamic linker and |
799 | all of it's structures are statically linked to the executable at | |
800 | link time. Thus the symbol for the address we are looking for has | |
801 | already been added to the minimal symbol table for the executable's | |
802 | objfile at the time the symbol file's symbols were read, and all we | |
803 | have to do is look it up there. Note that we explicitly do NOT want | |
804 | to find the copies in the shared library. | |
c906108c | 805 | |
c5aa993b JM |
806 | The SVR4 version is a bit more complicated because the address |
807 | is contained somewhere in the dynamic info section. We have to go | |
808 | to a lot more work to discover the address of the debug base symbol. | |
809 | Because of this complexity, we cache the value we find and return that | |
810 | value on subsequent invocations. Note there is no copy in the | |
811 | executable symbol tables. | |
c906108c SS |
812 | |
813 | */ | |
814 | ||
815 | static CORE_ADDR | |
fba45db2 | 816 | locate_base (void) |
c906108c SS |
817 | { |
818 | ||
819 | #ifndef SVR4_SHARED_LIBS | |
820 | ||
821 | struct minimal_symbol *msymbol; | |
822 | CORE_ADDR address = 0; | |
823 | char **symbolp; | |
824 | ||
825 | /* For SunOS, we want to limit the search for the debug base symbol to the | |
826 | executable being debugged, since there is a duplicate named symbol in the | |
827 | shared library. We don't want the shared library versions. */ | |
828 | ||
829 | for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++) | |
830 | { | |
831 | msymbol = lookup_minimal_symbol (*symbolp, NULL, symfile_objfile); | |
832 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) | |
833 | { | |
834 | address = SYMBOL_VALUE_ADDRESS (msymbol); | |
835 | return (address); | |
836 | } | |
837 | } | |
838 | return (0); | |
839 | ||
c5aa993b | 840 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
841 | |
842 | /* Check to see if we have a currently valid address, and if so, avoid | |
843 | doing all this work again and just return the cached address. If | |
844 | we have no cached address, try to locate it in the dynamic info | |
845 | section for ELF executables. */ | |
846 | ||
847 | if (debug_base == 0) | |
848 | { | |
849 | if (exec_bfd != NULL | |
850 | && bfd_get_flavour (exec_bfd) == bfd_target_elf_flavour) | |
851 | debug_base = elf_locate_base (); | |
852 | #ifdef HANDLE_SVR4_EXEC_EMULATORS | |
853 | /* Try it the hard way for emulated executables. */ | |
854 | else if (inferior_pid != 0 && target_has_execution) | |
855 | proc_iterate_over_mappings (look_for_base); | |
856 | #endif | |
857 | } | |
858 | return (debug_base); | |
859 | ||
c5aa993b | 860 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
861 | |
862 | } | |
863 | ||
864 | /* | |
865 | ||
c5aa993b | 866 | LOCAL FUNCTION |
c906108c | 867 | |
c5aa993b | 868 | first_link_map_member -- locate first member in dynamic linker's map |
c906108c | 869 | |
c5aa993b | 870 | SYNOPSIS |
c906108c | 871 | |
07cd4b97 | 872 | static CORE_ADDR first_link_map_member (void) |
c906108c | 873 | |
c5aa993b | 874 | DESCRIPTION |
c906108c | 875 | |
9ddea9f1 JB |
876 | Find the first element in the inferior's dynamic link map, and |
877 | return its address in the inferior. This function doesn't copy the | |
07cd4b97 | 878 | link map entry itself into our address space; current_sos actually |
9ddea9f1 | 879 | does the reading. */ |
c906108c | 880 | |
07cd4b97 | 881 | static CORE_ADDR |
fba45db2 | 882 | first_link_map_member (void) |
c906108c | 883 | { |
07cd4b97 | 884 | CORE_ADDR lm = 0; |
c906108c SS |
885 | |
886 | #ifndef SVR4_SHARED_LIBS | |
887 | ||
888 | read_memory (debug_base, (char *) &dynamic_copy, sizeof (dynamic_copy)); | |
889 | if (dynamic_copy.ld_version >= 2) | |
890 | { | |
891 | /* It is a version that we can deal with, so read in the secondary | |
c5aa993b | 892 | structure and find the address of the link map list from it. */ |
07cd4b97 JB |
893 | read_memory (SOLIB_EXTRACT_ADDRESS (dynamic_copy.ld_un.ld_2), |
894 | (char *) &ld_2_copy, sizeof (struct link_dynamic_2)); | |
895 | lm = SOLIB_EXTRACT_ADDRESS (ld_2_copy.ld_loaded); | |
c906108c SS |
896 | } |
897 | ||
c5aa993b | 898 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
899 | |
900 | read_memory (debug_base, (char *) &debug_copy, sizeof (struct r_debug)); | |
901 | /* FIXME: Perhaps we should validate the info somehow, perhaps by | |
902 | checking r_version for a known version number, or r_state for | |
903 | RT_CONSISTENT. */ | |
07cd4b97 | 904 | lm = SOLIB_EXTRACT_ADDRESS (debug_copy.r_map); |
c906108c | 905 | |
c5aa993b | 906 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
907 | |
908 | return (lm); | |
909 | } | |
910 | ||
104c1213 JM |
911 | #ifdef SVR4_SHARED_LIBS |
912 | /* | |
913 | ||
914 | LOCAL FUNCTION | |
915 | ||
9452d09b | 916 | open_symbol_file_object |
104c1213 JM |
917 | |
918 | SYNOPSIS | |
919 | ||
920 | void open_symbol_file_object (int from_tty) | |
921 | ||
922 | DESCRIPTION | |
923 | ||
924 | If no open symbol file, attempt to locate and open the main symbol | |
925 | file. On SVR4 systems, this is the first link map entry. If its | |
926 | name is here, we can open it. Useful when attaching to a process | |
927 | without first loading its symbol file. | |
928 | ||
929 | */ | |
930 | ||
9452d09b MS |
931 | static int |
932 | open_symbol_file_object (from_ttyp) | |
933 | int *from_ttyp; /* sneak past catch_errors */ | |
104c1213 | 934 | { |
07cd4b97 JB |
935 | CORE_ADDR lm; |
936 | struct link_map lmcopy; | |
104c1213 JM |
937 | char *filename; |
938 | int errcode; | |
939 | ||
940 | if (symfile_objfile) | |
941 | if (!query ("Attempt to reload symbols from process? ")) | |
942 | return 0; | |
943 | ||
944 | if ((debug_base = locate_base ()) == 0) | |
945 | return 0; /* failed somehow... */ | |
946 | ||
947 | /* First link map member should be the executable. */ | |
07cd4b97 | 948 | if ((lm = first_link_map_member ()) == 0) |
104c1213 JM |
949 | return 0; /* failed somehow... */ |
950 | ||
951 | /* Read from target memory to GDB. */ | |
07cd4b97 | 952 | read_memory (lm, (void *) &lmcopy, sizeof (lmcopy)); |
104c1213 JM |
953 | |
954 | if (lmcopy.l_name == 0) | |
955 | return 0; /* no filename. */ | |
956 | ||
957 | /* Now fetch the filename from target memory. */ | |
07cd4b97 | 958 | target_read_string (SOLIB_EXTRACT_ADDRESS (lmcopy.l_name), &filename, |
104c1213 JM |
959 | MAX_PATH_SIZE - 1, &errcode); |
960 | if (errcode) | |
961 | { | |
962 | warning ("failed to read exec filename from attached file: %s", | |
963 | safe_strerror (errcode)); | |
964 | return 0; | |
965 | } | |
966 | ||
74b7792f | 967 | make_cleanup (free, filename); |
104c1213 | 968 | /* Have a pathname: read the symbol file. */ |
9452d09b | 969 | symbol_file_command (filename, *from_ttyp); |
104c1213 JM |
970 | |
971 | return 1; | |
972 | } | |
973 | #endif /* SVR4_SHARED_LIBS */ | |
974 | ||
c906108c | 975 | |
07cd4b97 | 976 | /* LOCAL FUNCTION |
c906108c | 977 | |
07cd4b97 | 978 | free_so --- free a `struct so_list' object |
c906108c | 979 | |
c5aa993b | 980 | SYNOPSIS |
c906108c | 981 | |
07cd4b97 | 982 | void free_so (struct so_list *so) |
c906108c | 983 | |
c5aa993b | 984 | DESCRIPTION |
c906108c | 985 | |
07cd4b97 JB |
986 | Free the storage associated with the `struct so_list' object SO. |
987 | If we have opened a BFD for SO, close it. | |
c906108c | 988 | |
07cd4b97 JB |
989 | The caller is responsible for removing SO from whatever list it is |
990 | a member of. If we have placed SO's sections in some target's | |
991 | section table, the caller is responsible for removing them. | |
c906108c | 992 | |
07cd4b97 JB |
993 | This function doesn't mess with objfiles at all. If there is an |
994 | objfile associated with SO that needs to be removed, the caller is | |
995 | responsible for taking care of that. */ | |
996 | ||
997 | static void | |
998 | free_so (struct so_list *so) | |
c906108c | 999 | { |
07cd4b97 | 1000 | char *bfd_filename = 0; |
c5aa993b | 1001 | |
07cd4b97 JB |
1002 | if (so->sections) |
1003 | free (so->sections); | |
1004 | ||
1005 | if (so->abfd) | |
c906108c | 1006 | { |
07cd4b97 JB |
1007 | bfd_filename = bfd_get_filename (so->abfd); |
1008 | if (! bfd_close (so->abfd)) | |
1009 | warning ("cannot close \"%s\": %s", | |
1010 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
c906108c | 1011 | } |
07cd4b97 JB |
1012 | |
1013 | if (bfd_filename) | |
1014 | free (bfd_filename); | |
1015 | ||
1016 | free (so); | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /* On some systems, the only way to recognize the link map entry for | |
1021 | the main executable file is by looking at its name. Return | |
1022 | non-zero iff SONAME matches one of the known main executable names. */ | |
1023 | ||
1024 | static int | |
fba45db2 | 1025 | match_main (char *soname) |
07cd4b97 JB |
1026 | { |
1027 | char **mainp; | |
1028 | ||
1029 | for (mainp = main_name_list; *mainp != NULL; mainp++) | |
c906108c | 1030 | { |
07cd4b97 JB |
1031 | if (strcmp (soname, *mainp) == 0) |
1032 | return (1); | |
c906108c | 1033 | } |
07cd4b97 JB |
1034 | |
1035 | return (0); | |
1036 | } | |
1037 | ||
1038 | ||
1039 | /* LOCAL FUNCTION | |
1040 | ||
1041 | current_sos -- build a list of currently loaded shared objects | |
1042 | ||
1043 | SYNOPSIS | |
1044 | ||
1045 | struct so_list *current_sos () | |
1046 | ||
1047 | DESCRIPTION | |
1048 | ||
1049 | Build a list of `struct so_list' objects describing the shared | |
1050 | objects currently loaded in the inferior. This list does not | |
1051 | include an entry for the main executable file. | |
1052 | ||
1053 | Note that we only gather information directly available from the | |
1054 | inferior --- we don't examine any of the shared library files | |
1055 | themselves. The declaration of `struct so_list' says which fields | |
1056 | we provide values for. */ | |
1057 | ||
1058 | static struct so_list * | |
fba45db2 | 1059 | current_sos (void) |
07cd4b97 JB |
1060 | { |
1061 | CORE_ADDR lm; | |
1062 | struct so_list *head = 0; | |
1063 | struct so_list **link_ptr = &head; | |
1064 | ||
1065 | /* Make sure we've looked up the inferior's dynamic linker's base | |
1066 | structure. */ | |
1067 | if (! debug_base) | |
c906108c | 1068 | { |
07cd4b97 JB |
1069 | debug_base = locate_base (); |
1070 | ||
1071 | /* If we can't find the dynamic linker's base structure, this | |
1072 | must not be a dynamically linked executable. Hmm. */ | |
1073 | if (! debug_base) | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | /* Walk the inferior's link map list, and build our list of | |
1078 | `struct so_list' nodes. */ | |
1079 | lm = first_link_map_member (); | |
1080 | while (lm) | |
1081 | { | |
1082 | struct so_list *new | |
1083 | = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
15588ebb | 1084 | struct cleanup *old_chain = make_cleanup (free, new); |
07cd4b97 JB |
1085 | memset (new, 0, sizeof (*new)); |
1086 | ||
c5aa993b | 1087 | new->lmaddr = lm; |
07cd4b97 | 1088 | read_memory (lm, (char *) &(new->lm), sizeof (struct link_map)); |
c906108c | 1089 | |
07cd4b97 | 1090 | lm = LM_NEXT (new); |
c5aa993b | 1091 | |
c906108c | 1092 | /* For SVR4 versions, the first entry in the link map is for the |
c5aa993b JM |
1093 | inferior executable, so we must ignore it. For some versions of |
1094 | SVR4, it has no name. For others (Solaris 2.3 for example), it | |
1095 | does have a name, so we can no longer use a missing name to | |
1096 | decide when to ignore it. */ | |
07cd4b97 | 1097 | if (IGNORE_FIRST_LINK_MAP_ENTRY (new)) |
15588ebb | 1098 | free_so (new); |
07cd4b97 | 1099 | else |
c906108c SS |
1100 | { |
1101 | int errcode; | |
1102 | char *buffer; | |
07cd4b97 JB |
1103 | |
1104 | /* Extract this shared object's name. */ | |
1105 | target_read_string (LM_NAME (new), &buffer, | |
c906108c SS |
1106 | MAX_PATH_SIZE - 1, &errcode); |
1107 | if (errcode != 0) | |
1108 | { | |
07cd4b97 | 1109 | warning ("current_sos: Can't read pathname for load map: %s\n", |
c906108c | 1110 | safe_strerror (errcode)); |
c906108c | 1111 | } |
07cd4b97 JB |
1112 | else |
1113 | { | |
1114 | strncpy (new->so_name, buffer, MAX_PATH_SIZE - 1); | |
1115 | new->so_name[MAX_PATH_SIZE - 1] = '\0'; | |
1116 | free (buffer); | |
1117 | strcpy (new->so_original_name, new->so_name); | |
1118 | } | |
1119 | ||
1120 | /* If this entry has no name, or its name matches the name | |
1121 | for the main executable, don't include it in the list. */ | |
1122 | if (! new->so_name[0] | |
1123 | || match_main (new->so_name)) | |
1124 | free_so (new); | |
1125 | else | |
1126 | { | |
1127 | new->next = 0; | |
1128 | *link_ptr = new; | |
1129 | link_ptr = &new->next; | |
1130 | } | |
c5aa993b | 1131 | } |
15588ebb JB |
1132 | |
1133 | discard_cleanups (old_chain); | |
c906108c | 1134 | } |
07cd4b97 JB |
1135 | |
1136 | return head; | |
c906108c SS |
1137 | } |
1138 | ||
07cd4b97 | 1139 | |
c906108c SS |
1140 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
1141 | ||
1142 | static int | |
fba45db2 | 1143 | symbol_add_stub (PTR arg) |
c906108c | 1144 | { |
07cd4b97 | 1145 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 1146 | struct section_addr_info *sap; |
9e124216 EZ |
1147 | CORE_ADDR lowest_addr = 0; |
1148 | int lowest_index; | |
1149 | asection *lowest_sect = NULL; | |
c906108c | 1150 | |
07cd4b97 JB |
1151 | /* Have we already loaded this shared object? */ |
1152 | ALL_OBJFILES (so->objfile) | |
1153 | { | |
1154 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
1155 | return 1; | |
1156 | } | |
1157 | ||
1158 | /* Find the shared object's text segment. */ | |
c5aa993b | 1159 | if (so->textsection) |
9e124216 EZ |
1160 | { |
1161 | lowest_addr = so->textsection->addr; | |
1162 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); | |
1163 | lowest_index = lowest_sect->index; | |
1164 | } | |
c5aa993b | 1165 | else if (so->abfd != NULL) |
c906108c | 1166 | { |
9e124216 EZ |
1167 | /* If we didn't find a mapped non zero sized .text section, set |
1168 | up lowest_addr so that the relocation in symbol_file_add does | |
1169 | no harm. */ | |
c5aa993b | 1170 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); |
c906108c | 1171 | if (lowest_sect == NULL) |
c5aa993b | 1172 | bfd_map_over_sections (so->abfd, find_lowest_section, |
96baa820 | 1173 | (PTR) &lowest_sect); |
c906108c | 1174 | if (lowest_sect) |
9e124216 EZ |
1175 | { |
1176 | lowest_addr = bfd_section_vma (so->abfd, lowest_sect) | |
1177 | + LM_ADDR (so); | |
1178 | lowest_index = lowest_sect->index; | |
1179 | } | |
c906108c | 1180 | } |
c5aa993b | 1181 | |
62557bbc KB |
1182 | sap = build_section_addr_info_from_section_table (so->sections, |
1183 | so->sections_end); | |
e7cf9df1 | 1184 | |
9e124216 EZ |
1185 | sap->other[lowest_index].addr = lowest_addr; |
1186 | ||
62557bbc KB |
1187 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
1188 | sap, 0, OBJF_SHARED); | |
1189 | free_section_addr_info (sap); | |
c906108c | 1190 | |
07cd4b97 | 1191 | return (1); |
c906108c SS |
1192 | } |
1193 | ||
c906108c | 1194 | |
07cd4b97 | 1195 | /* LOCAL FUNCTION |
c906108c | 1196 | |
105b175f | 1197 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 1198 | |
c5aa993b | 1199 | SYNOPSIS |
c906108c | 1200 | |
105b175f | 1201 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 1202 | |
07cd4b97 | 1203 | Extract the list of currently loaded shared objects from the |
105b175f JB |
1204 | inferior, and compare it with the list of shared objects currently |
1205 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
1206 | with the inferior's new list. | |
c906108c | 1207 | |
105b175f JB |
1208 | If we notice that the inferior has unloaded some shared objects, |
1209 | free any symbolic info GDB had read about those shared objects. | |
1210 | ||
1211 | Don't load symbolic info for any new shared objects; just add them | |
1212 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
1213 | |
1214 | If FROM_TTY is non-null, feel free to print messages about what | |
1215 | we're doing. | |
c906108c | 1216 | |
07cd4b97 JB |
1217 | If TARGET is non-null, add the sections of all new shared objects |
1218 | to TARGET's section table. Note that this doesn't remove any | |
1219 | sections for shared objects that have been unloaded, and it | |
1220 | doesn't check to see if the new shared objects are already present in | |
1221 | the section table. But we only use this for core files and | |
1222 | processes we've just attached to, so that's okay. */ | |
c906108c | 1223 | |
07cd4b97 | 1224 | void |
105b175f | 1225 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 JB |
1226 | { |
1227 | struct so_list *inferior = current_sos (); | |
1228 | struct so_list *gdb, **gdb_link; | |
1229 | ||
104c1213 JM |
1230 | #ifdef SVR4_SHARED_LIBS |
1231 | /* If we are attaching to a running process for which we | |
1232 | have not opened a symbol file, we may be able to get its | |
1233 | symbols now! */ | |
1234 | if (attach_flag && | |
1235 | symfile_objfile == NULL) | |
9452d09b | 1236 | catch_errors (open_symbol_file_object, (PTR) &from_tty, |
104c1213 JM |
1237 | "Error reading attached process's symbol file.\n", |
1238 | RETURN_MASK_ALL); | |
1239 | ||
1240 | #endif SVR4_SHARED_LIBS | |
1241 | ||
07cd4b97 JB |
1242 | /* Since this function might actually add some elements to the |
1243 | so_list_head list, arrange for it to be cleaned up when | |
1244 | appropriate. */ | |
1245 | if (!solib_cleanup_queued) | |
1246 | { | |
1247 | make_run_cleanup (do_clear_solib, NULL); | |
1248 | solib_cleanup_queued = 1; | |
c906108c | 1249 | } |
c5aa993b | 1250 | |
07cd4b97 JB |
1251 | /* GDB and the inferior's dynamic linker each maintain their own |
1252 | list of currently loaded shared objects; we want to bring the | |
1253 | former in sync with the latter. Scan both lists, seeing which | |
1254 | shared objects appear where. There are three cases: | |
1255 | ||
1256 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
1257 | knows about it already, and it's still loaded in the inferior. |
1258 | Nothing needs to happen. | |
07cd4b97 JB |
1259 | |
1260 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
1261 | the inferior has unloaded it. We should remove the shared |
1262 | object from GDB's tables. | |
07cd4b97 JB |
1263 | |
1264 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
1265 | means that it's just been loaded. We should add it to GDB's |
1266 | tables. | |
07cd4b97 JB |
1267 | |
1268 | So we walk GDB's list, checking each entry to see if it appears | |
1269 | in the inferior's list too. If it does, no action is needed, and | |
1270 | we remove it from the inferior's list. If it doesn't, the | |
1271 | inferior has unloaded it, and we remove it from GDB's list. By | |
1272 | the time we're done walking GDB's list, the inferior's list | |
1273 | contains only the new shared objects, which we then add. */ | |
1274 | ||
1275 | gdb = so_list_head; | |
1276 | gdb_link = &so_list_head; | |
1277 | while (gdb) | |
c906108c | 1278 | { |
07cd4b97 JB |
1279 | struct so_list *i = inferior; |
1280 | struct so_list **i_link = &inferior; | |
1281 | ||
1282 | /* Check to see whether the shared object *gdb also appears in | |
1283 | the inferior's current list. */ | |
1284 | while (i) | |
c906108c | 1285 | { |
07cd4b97 JB |
1286 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
1287 | break; | |
1288 | ||
1289 | i_link = &i->next; | |
1290 | i = *i_link; | |
c906108c | 1291 | } |
c5aa993b | 1292 | |
07cd4b97 JB |
1293 | /* If the shared object appears on the inferior's list too, then |
1294 | it's still loaded, so we don't need to do anything. Delete | |
1295 | it from the inferior's list, and leave it on GDB's list. */ | |
1296 | if (i) | |
c906108c | 1297 | { |
07cd4b97 | 1298 | *i_link = i->next; |
07cd4b97 JB |
1299 | free_so (i); |
1300 | gdb_link = &gdb->next; | |
1301 | gdb = *gdb_link; | |
1302 | } | |
1303 | ||
1304 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
1305 | else | |
1306 | { | |
1307 | *gdb_link = gdb->next; | |
07cd4b97 JB |
1308 | |
1309 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 1310 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
1311 | free_objfile (gdb->objfile); |
1312 | ||
1313 | /* Some targets' section tables might be referring to | |
1314 | sections from so->abfd; remove them. */ | |
1315 | remove_target_sections (gdb->abfd); | |
1316 | ||
1317 | free_so (gdb); | |
1318 | gdb = *gdb_link; | |
c906108c SS |
1319 | } |
1320 | } | |
c5aa993b | 1321 | |
07cd4b97 JB |
1322 | /* Now the inferior's list contains only shared objects that don't |
1323 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 1324 | to GDB's shared object list. */ |
07cd4b97 | 1325 | if (inferior) |
c906108c | 1326 | { |
07cd4b97 JB |
1327 | struct so_list *i; |
1328 | ||
1329 | /* Add the new shared objects to GDB's list. */ | |
1330 | *gdb_link = inferior; | |
1331 | ||
e8930304 | 1332 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 1333 | for (i = inferior; i; i = i->next) |
c906108c | 1334 | { |
07cd4b97 JB |
1335 | i->from_tty = from_tty; |
1336 | ||
1337 | /* Fill in the rest of the `struct so_list' node. */ | |
1338 | catch_errors (solib_map_sections, i, | |
1339 | "Error while mapping shared library sections:\n", | |
1340 | RETURN_MASK_ALL); | |
07cd4b97 JB |
1341 | } |
1342 | ||
1343 | /* If requested, add the shared objects' sections to the the | |
1344 | TARGET's section table. */ | |
1345 | if (target) | |
1346 | { | |
1347 | int new_sections; | |
1348 | ||
1349 | /* Figure out how many sections we'll need to add in total. */ | |
1350 | new_sections = 0; | |
1351 | for (i = inferior; i; i = i->next) | |
1352 | new_sections += (i->sections_end - i->sections); | |
1353 | ||
1354 | if (new_sections > 0) | |
c906108c | 1355 | { |
07cd4b97 JB |
1356 | int space = target_resize_to_sections (target, new_sections); |
1357 | ||
1358 | for (i = inferior; i; i = i->next) | |
1359 | { | |
1360 | int count = (i->sections_end - i->sections); | |
1361 | memcpy (target->to_sections + space, | |
1362 | i->sections, | |
1363 | count * sizeof (i->sections[0])); | |
1364 | space += count; | |
1365 | } | |
c906108c SS |
1366 | } |
1367 | } | |
e8930304 | 1368 | } |
105b175f JB |
1369 | } |
1370 | ||
1371 | ||
1372 | /* GLOBAL FUNCTION | |
1373 | ||
1374 | solib_add -- read in symbol info for newly added shared libraries | |
1375 | ||
1376 | SYNOPSIS | |
1377 | ||
1378 | void solib_add (char *pattern, int from_tty, struct target_ops *TARGET) | |
1379 | ||
1380 | DESCRIPTION | |
1381 | ||
1382 | Read in symbolic information for any shared objects whose names | |
1383 | match PATTERN. (If we've already read a shared object's symbol | |
1384 | info, leave it alone.) If PATTERN is zero, read them all. | |
1385 | ||
1386 | FROM_TTY and TARGET are as described for update_solib_list, above. */ | |
1387 | ||
1388 | void | |
1389 | solib_add (char *pattern, int from_tty, struct target_ops *target) | |
1390 | { | |
1391 | struct so_list *gdb; | |
1392 | ||
1393 | if (pattern) | |
1394 | { | |
1395 | char *re_err = re_comp (pattern); | |
1396 | ||
1397 | if (re_err) | |
1398 | error ("Invalid regexp: %s", re_err); | |
1399 | } | |
1400 | ||
1401 | update_solib_list (from_tty, target); | |
c906108c | 1402 | |
105b175f JB |
1403 | /* Walk the list of currently loaded shared libraries, and read |
1404 | symbols for any that match the pattern --- or any whose symbols | |
1405 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
1406 | { |
1407 | int any_matches = 0; | |
1408 | int loaded_any_symbols = 0; | |
c906108c | 1409 | |
e8930304 JB |
1410 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
1411 | if (! pattern || re_exec (gdb->so_name)) | |
1412 | { | |
1413 | any_matches = 1; | |
1414 | ||
1415 | if (gdb->symbols_loaded) | |
1416 | { | |
1417 | if (from_tty) | |
1418 | printf_unfiltered ("Symbols already loaded for %s\n", | |
1419 | gdb->so_name); | |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | if (catch_errors | |
1424 | (symbol_add_stub, gdb, | |
1425 | "Error while reading shared library symbols:\n", | |
1426 | RETURN_MASK_ALL)) | |
1427 | { | |
1428 | if (from_tty) | |
1429 | printf_unfiltered ("Loaded symbols for %s\n", | |
1430 | gdb->so_name); | |
1431 | gdb->symbols_loaded = 1; | |
1432 | loaded_any_symbols = 1; | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | ||
1437 | if (from_tty && pattern && ! any_matches) | |
1438 | printf_unfiltered | |
1439 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1440 | ||
1441 | if (loaded_any_symbols) | |
1442 | { | |
1443 | /* Getting new symbols may change our opinion about what is | |
1444 | frameless. */ | |
1445 | reinit_frame_cache (); | |
1446 | ||
1447 | special_symbol_handling (); | |
1448 | } | |
1449 | } | |
c906108c SS |
1450 | } |
1451 | ||
07cd4b97 | 1452 | |
c906108c SS |
1453 | /* |
1454 | ||
c5aa993b | 1455 | LOCAL FUNCTION |
c906108c | 1456 | |
c5aa993b | 1457 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 1458 | |
c5aa993b | 1459 | SYNOPSIS |
c906108c | 1460 | |
c5aa993b | 1461 | static void info_sharedlibrary_command () |
c906108c | 1462 | |
c5aa993b | 1463 | DESCRIPTION |
c906108c | 1464 | |
c5aa993b JM |
1465 | Walk through the shared library list and print information |
1466 | about each attached library. | |
1467 | */ | |
c906108c SS |
1468 | |
1469 | static void | |
fba45db2 | 1470 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 1471 | { |
c5aa993b | 1472 | register struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
1473 | int header_done = 0; |
1474 | int addr_width; | |
1475 | char *addr_fmt; | |
f5b8946c | 1476 | int arch_size; |
c906108c SS |
1477 | |
1478 | if (exec_bfd == NULL) | |
1479 | { | |
4ce44c66 | 1480 | printf_unfiltered ("No executable file.\n"); |
c906108c SS |
1481 | return; |
1482 | } | |
1483 | ||
6ceadee4 | 1484 | arch_size = bfd_get_arch_size (exec_bfd); |
f5b8946c MS |
1485 | /* Default to 32-bit in case of failure (non-elf). */ |
1486 | if (arch_size == 32 || arch_size == -1) | |
1487 | { | |
1488 | addr_width = 8 + 4; | |
1489 | addr_fmt = "08l"; | |
1490 | } | |
1491 | else if (arch_size == 64) | |
1492 | { | |
1493 | addr_width = 16 + 4; | |
1494 | addr_fmt = "016l"; | |
1495 | } | |
c906108c | 1496 | |
105b175f | 1497 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
1498 | |
1499 | for (so = so_list_head; so; so = so->next) | |
c906108c | 1500 | { |
c5aa993b | 1501 | if (so->so_name[0]) |
c906108c SS |
1502 | { |
1503 | if (!header_done) | |
1504 | { | |
c5aa993b JM |
1505 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
1506 | addr_width, "To", "Syms Read", | |
1507 | "Shared Object Library"); | |
c906108c SS |
1508 | header_done++; |
1509 | } | |
1510 | ||
1511 | printf_unfiltered ("%-*s", addr_width, | |
c5aa993b JM |
1512 | local_hex_string_custom ((unsigned long) LM_ADDR (so), |
1513 | addr_fmt)); | |
c906108c | 1514 | printf_unfiltered ("%-*s", addr_width, |
c5aa993b JM |
1515 | local_hex_string_custom ((unsigned long) so->lmend, |
1516 | addr_fmt)); | |
1517 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); | |
1518 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
1519 | } |
1520 | } | |
1521 | if (so_list_head == NULL) | |
1522 | { | |
c5aa993b | 1523 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
c906108c SS |
1524 | } |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | ||
c5aa993b | 1529 | GLOBAL FUNCTION |
c906108c | 1530 | |
c5aa993b | 1531 | solib_address -- check to see if an address is in a shared lib |
c906108c | 1532 | |
c5aa993b | 1533 | SYNOPSIS |
c906108c | 1534 | |
c5aa993b | 1535 | char * solib_address (CORE_ADDR address) |
c906108c | 1536 | |
c5aa993b | 1537 | DESCRIPTION |
c906108c | 1538 | |
c5aa993b JM |
1539 | Provides a hook for other gdb routines to discover whether or |
1540 | not a particular address is within the mapped address space of | |
1541 | a shared library. Any address between the base mapping address | |
1542 | and the first address beyond the end of the last mapping, is | |
1543 | considered to be within the shared library address space, for | |
1544 | our purposes. | |
c906108c | 1545 | |
c5aa993b JM |
1546 | For example, this routine is called at one point to disable |
1547 | breakpoints which are in shared libraries that are not currently | |
1548 | mapped in. | |
c906108c SS |
1549 | */ |
1550 | ||
1551 | char * | |
fba45db2 | 1552 | solib_address (CORE_ADDR address) |
c906108c | 1553 | { |
c5aa993b JM |
1554 | register struct so_list *so = 0; /* link map state variable */ |
1555 | ||
07cd4b97 | 1556 | for (so = so_list_head; so; so = so->next) |
c906108c | 1557 | { |
07cd4b97 JB |
1558 | if (LM_ADDR (so) <= address && address < so->lmend) |
1559 | return (so->so_name); | |
c906108c | 1560 | } |
07cd4b97 | 1561 | |
c906108c SS |
1562 | return (0); |
1563 | } | |
1564 | ||
1565 | /* Called by free_all_symtabs */ | |
1566 | ||
c5aa993b | 1567 | void |
fba45db2 | 1568 | clear_solib (void) |
c906108c | 1569 | { |
085dd6e6 JM |
1570 | /* This function is expected to handle ELF shared libraries. It is |
1571 | also used on Solaris, which can run either ELF or a.out binaries | |
1572 | (for compatibility with SunOS 4), both of which can use shared | |
1573 | libraries. So we don't know whether we have an ELF executable or | |
1574 | an a.out executable until the user chooses an executable file. | |
1575 | ||
1576 | ELF shared libraries don't get mapped into the address space | |
1577 | until after the program starts, so we'd better not try to insert | |
1578 | breakpoints in them immediately. We have to wait until the | |
1579 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
1580 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
1581 | it's ready. | |
1582 | ||
1583 | SunOS shared libraries seem to be different --- they're present | |
1584 | as soon as the process begins execution, so there's no need to | |
1585 | put off inserting breakpoints. There's also nowhere to put a | |
1586 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
1587 | around to it. | |
1588 | ||
1589 | So: disable breakpoints only if we're using ELF shared libs. */ | |
1590 | if (exec_bfd != NULL | |
1591 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
1592 | disable_breakpoints_in_shlibs (1); | |
1593 | ||
c906108c SS |
1594 | while (so_list_head) |
1595 | { | |
07cd4b97 JB |
1596 | struct so_list *so = so_list_head; |
1597 | so_list_head = so->next; | |
1598 | free_so (so); | |
c906108c | 1599 | } |
07cd4b97 | 1600 | |
c906108c SS |
1601 | debug_base = 0; |
1602 | } | |
1603 | ||
1604 | static void | |
fba45db2 | 1605 | do_clear_solib (PTR dummy) |
c906108c SS |
1606 | { |
1607 | solib_cleanup_queued = 0; | |
1608 | clear_solib (); | |
1609 | } | |
1610 | ||
1611 | #ifdef SVR4_SHARED_LIBS | |
1612 | ||
1613 | /* Return 1 if PC lies in the dynamic symbol resolution code of the | |
1614 | SVR4 run time loader. */ | |
1615 | ||
1616 | static CORE_ADDR interp_text_sect_low; | |
1617 | static CORE_ADDR interp_text_sect_high; | |
1618 | static CORE_ADDR interp_plt_sect_low; | |
1619 | static CORE_ADDR interp_plt_sect_high; | |
1620 | ||
1621 | int | |
fba45db2 | 1622 | in_svr4_dynsym_resolve_code (CORE_ADDR pc) |
c906108c SS |
1623 | { |
1624 | return ((pc >= interp_text_sect_low && pc < interp_text_sect_high) | |
1625 | || (pc >= interp_plt_sect_low && pc < interp_plt_sect_high) | |
1626 | || in_plt_section (pc, NULL)); | |
1627 | } | |
1628 | #endif | |
1629 | ||
1630 | /* | |
1631 | ||
c5aa993b | 1632 | LOCAL FUNCTION |
c906108c | 1633 | |
c5aa993b | 1634 | disable_break -- remove the "mapping changed" breakpoint |
c906108c | 1635 | |
c5aa993b | 1636 | SYNOPSIS |
c906108c | 1637 | |
c5aa993b | 1638 | static int disable_break () |
c906108c | 1639 | |
c5aa993b | 1640 | DESCRIPTION |
c906108c | 1641 | |
c5aa993b JM |
1642 | Removes the breakpoint that gets hit when the dynamic linker |
1643 | completes a mapping change. | |
c906108c | 1644 | |
c5aa993b | 1645 | */ |
c906108c SS |
1646 | |
1647 | #ifndef SVR4_SHARED_LIBS | |
1648 | ||
1649 | static int | |
fba45db2 | 1650 | disable_break (void) |
c906108c SS |
1651 | { |
1652 | int status = 1; | |
1653 | ||
1654 | #ifndef SVR4_SHARED_LIBS | |
1655 | ||
1656 | int in_debugger = 0; | |
c5aa993b | 1657 | |
c906108c SS |
1658 | /* Read the debugger structure from the inferior to retrieve the |
1659 | address of the breakpoint and the original contents of the | |
1660 | breakpoint address. Remove the breakpoint by writing the original | |
1661 | contents back. */ | |
1662 | ||
1663 | read_memory (debug_addr, (char *) &debug_copy, sizeof (debug_copy)); | |
1664 | ||
1665 | /* Set `in_debugger' to zero now. */ | |
1666 | ||
1667 | write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger)); | |
1668 | ||
07cd4b97 | 1669 | breakpoint_addr = SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_bp_addr); |
c906108c SS |
1670 | write_memory (breakpoint_addr, (char *) &debug_copy.ldd_bp_inst, |
1671 | sizeof (debug_copy.ldd_bp_inst)); | |
1672 | ||
c5aa993b | 1673 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
1674 | |
1675 | /* Note that breakpoint address and original contents are in our address | |
1676 | space, so we just need to write the original contents back. */ | |
1677 | ||
1678 | if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0) | |
1679 | { | |
1680 | status = 0; | |
1681 | } | |
1682 | ||
c5aa993b | 1683 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
1684 | |
1685 | /* For the SVR4 version, we always know the breakpoint address. For the | |
1686 | SunOS version we don't know it until the above code is executed. | |
1687 | Grumble if we are stopped anywhere besides the breakpoint address. */ | |
1688 | ||
1689 | if (stop_pc != breakpoint_addr) | |
1690 | { | |
1691 | warning ("stopped at unknown breakpoint while handling shared libraries"); | |
1692 | } | |
1693 | ||
1694 | return (status); | |
1695 | } | |
1696 | ||
c5aa993b | 1697 | #endif /* #ifdef SVR4_SHARED_LIBS */ |
c906108c SS |
1698 | |
1699 | /* | |
1700 | ||
c5aa993b JM |
1701 | LOCAL FUNCTION |
1702 | ||
1703 | enable_break -- arrange for dynamic linker to hit breakpoint | |
1704 | ||
1705 | SYNOPSIS | |
1706 | ||
1707 | int enable_break (void) | |
1708 | ||
1709 | DESCRIPTION | |
1710 | ||
1711 | Both the SunOS and the SVR4 dynamic linkers have, as part of their | |
1712 | debugger interface, support for arranging for the inferior to hit | |
1713 | a breakpoint after mapping in the shared libraries. This function | |
1714 | enables that breakpoint. | |
1715 | ||
1716 | For SunOS, there is a special flag location (in_debugger) which we | |
1717 | set to 1. When the dynamic linker sees this flag set, it will set | |
1718 | a breakpoint at a location known only to itself, after saving the | |
1719 | original contents of that place and the breakpoint address itself, | |
1720 | in it's own internal structures. When we resume the inferior, it | |
1721 | will eventually take a SIGTRAP when it runs into the breakpoint. | |
1722 | We handle this (in a different place) by restoring the contents of | |
1723 | the breakpointed location (which is only known after it stops), | |
1724 | chasing around to locate the shared libraries that have been | |
1725 | loaded, then resuming. | |
1726 | ||
1727 | For SVR4, the debugger interface structure contains a member (r_brk) | |
1728 | which is statically initialized at the time the shared library is | |
1729 | built, to the offset of a function (_r_debug_state) which is guaran- | |
1730 | teed to be called once before mapping in a library, and again when | |
1731 | the mapping is complete. At the time we are examining this member, | |
1732 | it contains only the unrelocated offset of the function, so we have | |
1733 | to do our own relocation. Later, when the dynamic linker actually | |
1734 | runs, it relocates r_brk to be the actual address of _r_debug_state(). | |
1735 | ||
1736 | The debugger interface structure also contains an enumeration which | |
1737 | is set to either RT_ADD or RT_DELETE prior to changing the mapping, | |
1738 | depending upon whether or not the library is being mapped or unmapped, | |
1739 | and then set to RT_CONSISTENT after the library is mapped/unmapped. | |
1740 | */ | |
c906108c SS |
1741 | |
1742 | static int | |
fba45db2 | 1743 | enable_break (void) |
c906108c SS |
1744 | { |
1745 | int success = 0; | |
1746 | ||
1747 | #ifndef SVR4_SHARED_LIBS | |
1748 | ||
1749 | int j; | |
1750 | int in_debugger; | |
1751 | ||
1752 | /* Get link_dynamic structure */ | |
1753 | ||
1754 | j = target_read_memory (debug_base, (char *) &dynamic_copy, | |
1755 | sizeof (dynamic_copy)); | |
1756 | if (j) | |
1757 | { | |
1758 | /* unreadable */ | |
1759 | return (0); | |
1760 | } | |
1761 | ||
1762 | /* Calc address of debugger interface structure */ | |
1763 | ||
07cd4b97 | 1764 | debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd); |
c906108c SS |
1765 | |
1766 | /* Calc address of `in_debugger' member of debugger interface structure */ | |
1767 | ||
1768 | flag_addr = debug_addr + (CORE_ADDR) ((char *) &debug_copy.ldd_in_debugger - | |
1769 | (char *) &debug_copy); | |
1770 | ||
1771 | /* Write a value of 1 to this member. */ | |
1772 | ||
1773 | in_debugger = 1; | |
1774 | write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger)); | |
1775 | success = 1; | |
1776 | ||
c5aa993b | 1777 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
1778 | |
1779 | #ifdef BKPT_AT_SYMBOL | |
1780 | ||
1781 | struct minimal_symbol *msymbol; | |
1782 | char **bkpt_namep; | |
1783 | asection *interp_sect; | |
1784 | ||
1785 | /* First, remove all the solib event breakpoints. Their addresses | |
1786 | may have changed since the last time we ran the program. */ | |
1787 | remove_solib_event_breakpoints (); | |
1788 | ||
1789 | #ifdef SVR4_SHARED_LIBS | |
1790 | interp_text_sect_low = interp_text_sect_high = 0; | |
1791 | interp_plt_sect_low = interp_plt_sect_high = 0; | |
1792 | ||
1793 | /* Find the .interp section; if not found, warn the user and drop | |
1794 | into the old breakpoint at symbol code. */ | |
1795 | interp_sect = bfd_get_section_by_name (exec_bfd, ".interp"); | |
1796 | if (interp_sect) | |
1797 | { | |
1798 | unsigned int interp_sect_size; | |
1799 | char *buf; | |
1800 | CORE_ADDR load_addr; | |
1801 | bfd *tmp_bfd; | |
1802 | CORE_ADDR sym_addr = 0; | |
1803 | ||
1804 | /* Read the contents of the .interp section into a local buffer; | |
c5aa993b | 1805 | the contents specify the dynamic linker this program uses. */ |
c906108c SS |
1806 | interp_sect_size = bfd_section_size (exec_bfd, interp_sect); |
1807 | buf = alloca (interp_sect_size); | |
1808 | bfd_get_section_contents (exec_bfd, interp_sect, | |
1809 | buf, 0, interp_sect_size); | |
1810 | ||
1811 | /* Now we need to figure out where the dynamic linker was | |
c5aa993b JM |
1812 | loaded so that we can load its symbols and place a breakpoint |
1813 | in the dynamic linker itself. | |
c906108c | 1814 | |
c5aa993b JM |
1815 | This address is stored on the stack. However, I've been unable |
1816 | to find any magic formula to find it for Solaris (appears to | |
1817 | be trivial on GNU/Linux). Therefore, we have to try an alternate | |
1818 | mechanism to find the dynamic linker's base address. */ | |
c906108c SS |
1819 | tmp_bfd = bfd_openr (buf, gnutarget); |
1820 | if (tmp_bfd == NULL) | |
1821 | goto bkpt_at_symbol; | |
1822 | ||
1823 | /* Make sure the dynamic linker's really a useful object. */ | |
1824 | if (!bfd_check_format (tmp_bfd, bfd_object)) | |
1825 | { | |
1826 | warning ("Unable to grok dynamic linker %s as an object file", buf); | |
1827 | bfd_close (tmp_bfd); | |
1828 | goto bkpt_at_symbol; | |
1829 | } | |
1830 | ||
1831 | /* We find the dynamic linker's base address by examining the | |
c5aa993b JM |
1832 | current pc (which point at the entry point for the dynamic |
1833 | linker) and subtracting the offset of the entry point. */ | |
c906108c SS |
1834 | load_addr = read_pc () - tmp_bfd->start_address; |
1835 | ||
1836 | /* Record the relocated start and end address of the dynamic linker | |
c5aa993b | 1837 | text and plt section for in_svr4_dynsym_resolve_code. */ |
c906108c SS |
1838 | interp_sect = bfd_get_section_by_name (tmp_bfd, ".text"); |
1839 | if (interp_sect) | |
1840 | { | |
1841 | interp_text_sect_low = | |
1842 | bfd_section_vma (tmp_bfd, interp_sect) + load_addr; | |
1843 | interp_text_sect_high = | |
1844 | interp_text_sect_low + bfd_section_size (tmp_bfd, interp_sect); | |
1845 | } | |
1846 | interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt"); | |
1847 | if (interp_sect) | |
1848 | { | |
1849 | interp_plt_sect_low = | |
1850 | bfd_section_vma (tmp_bfd, interp_sect) + load_addr; | |
1851 | interp_plt_sect_high = | |
1852 | interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect); | |
1853 | } | |
1854 | ||
1855 | /* Now try to set a breakpoint in the dynamic linker. */ | |
1856 | for (bkpt_namep = solib_break_names; *bkpt_namep != NULL; bkpt_namep++) | |
1857 | { | |
1858 | sym_addr = bfd_lookup_symbol (tmp_bfd, *bkpt_namep); | |
1859 | if (sym_addr != 0) | |
1860 | break; | |
1861 | } | |
1862 | ||
1863 | /* We're done with the temporary bfd. */ | |
1864 | bfd_close (tmp_bfd); | |
1865 | ||
1866 | if (sym_addr != 0) | |
1867 | { | |
1868 | create_solib_event_breakpoint (load_addr + sym_addr); | |
1869 | return 1; | |
1870 | } | |
1871 | ||
1872 | /* For whatever reason we couldn't set a breakpoint in the dynamic | |
c5aa993b JM |
1873 | linker. Warn and drop into the old code. */ |
1874 | bkpt_at_symbol: | |
c906108c SS |
1875 | warning ("Unable to find dynamic linker breakpoint function.\nGDB will be unable to debug shared library initializers\nand track explicitly loaded dynamic code."); |
1876 | } | |
1877 | #endif | |
1878 | ||
1879 | /* Scan through the list of symbols, trying to look up the symbol and | |
1880 | set a breakpoint there. Terminate loop when we/if we succeed. */ | |
1881 | ||
1882 | breakpoint_addr = 0; | |
1883 | for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++) | |
1884 | { | |
1885 | msymbol = lookup_minimal_symbol (*bkpt_namep, NULL, symfile_objfile); | |
1886 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) | |
1887 | { | |
1888 | create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol)); | |
1889 | return 1; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | /* Nothing good happened. */ | |
1894 | success = 0; | |
1895 | ||
c5aa993b | 1896 | #endif /* BKPT_AT_SYMBOL */ |
c906108c | 1897 | |
c5aa993b | 1898 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
1899 | |
1900 | return (success); | |
1901 | } | |
c5aa993b | 1902 | |
c906108c | 1903 | /* |
c5aa993b JM |
1904 | |
1905 | GLOBAL FUNCTION | |
1906 | ||
1907 | solib_create_inferior_hook -- shared library startup support | |
1908 | ||
1909 | SYNOPSIS | |
1910 | ||
1911 | void solib_create_inferior_hook() | |
1912 | ||
1913 | DESCRIPTION | |
1914 | ||
1915 | When gdb starts up the inferior, it nurses it along (through the | |
1916 | shell) until it is ready to execute it's first instruction. At this | |
1917 | point, this function gets called via expansion of the macro | |
1918 | SOLIB_CREATE_INFERIOR_HOOK. | |
1919 | ||
1920 | For SunOS executables, this first instruction is typically the | |
1921 | one at "_start", or a similar text label, regardless of whether | |
1922 | the executable is statically or dynamically linked. The runtime | |
1923 | startup code takes care of dynamically linking in any shared | |
1924 | libraries, once gdb allows the inferior to continue. | |
1925 | ||
1926 | For SVR4 executables, this first instruction is either the first | |
1927 | instruction in the dynamic linker (for dynamically linked | |
1928 | executables) or the instruction at "start" for statically linked | |
1929 | executables. For dynamically linked executables, the system | |
1930 | first exec's /lib/libc.so.N, which contains the dynamic linker, | |
1931 | and starts it running. The dynamic linker maps in any needed | |
1932 | shared libraries, maps in the actual user executable, and then | |
1933 | jumps to "start" in the user executable. | |
1934 | ||
1935 | For both SunOS shared libraries, and SVR4 shared libraries, we | |
1936 | can arrange to cooperate with the dynamic linker to discover the | |
1937 | names of shared libraries that are dynamically linked, and the | |
1938 | base addresses to which they are linked. | |
1939 | ||
1940 | This function is responsible for discovering those names and | |
1941 | addresses, and saving sufficient information about them to allow | |
1942 | their symbols to be read at a later time. | |
1943 | ||
1944 | FIXME | |
1945 | ||
1946 | Between enable_break() and disable_break(), this code does not | |
1947 | properly handle hitting breakpoints which the user might have | |
1948 | set in the startup code or in the dynamic linker itself. Proper | |
1949 | handling will probably have to wait until the implementation is | |
1950 | changed to use the "breakpoint handler function" method. | |
1951 | ||
1952 | Also, what if child has exit()ed? Must exit loop somehow. | |
1953 | */ | |
1954 | ||
1955 | void | |
fba45db2 | 1956 | solib_create_inferior_hook (void) |
c906108c SS |
1957 | { |
1958 | /* If we are using the BKPT_AT_SYMBOL code, then we don't need the base | |
1959 | yet. In fact, in the case of a SunOS4 executable being run on | |
07cd4b97 | 1960 | Solaris, we can't get it yet. current_sos will get it when it needs |
c906108c SS |
1961 | it. */ |
1962 | #if !(defined (SVR4_SHARED_LIBS) && defined (BKPT_AT_SYMBOL)) | |
1963 | if ((debug_base = locate_base ()) == 0) | |
1964 | { | |
1965 | /* Can't find the symbol or the executable is statically linked. */ | |
1966 | return; | |
1967 | } | |
1968 | #endif | |
1969 | ||
1970 | if (!enable_break ()) | |
1971 | { | |
1972 | warning ("shared library handler failed to enable breakpoint"); | |
1973 | return; | |
1974 | } | |
1975 | ||
1976 | #if !defined(SVR4_SHARED_LIBS) || defined(_SCO_DS) | |
1977 | /* SCO and SunOS need the loop below, other systems should be using the | |
1978 | special shared library breakpoints and the shared library breakpoint | |
1979 | service routine. | |
1980 | ||
1981 | Now run the target. It will eventually hit the breakpoint, at | |
1982 | which point all of the libraries will have been mapped in and we | |
1983 | can go groveling around in the dynamic linker structures to find | |
1984 | out what we need to know about them. */ | |
1985 | ||
1986 | clear_proceed_status (); | |
1987 | stop_soon_quietly = 1; | |
1988 | stop_signal = TARGET_SIGNAL_0; | |
1989 | do | |
1990 | { | |
1991 | target_resume (-1, 0, stop_signal); | |
1992 | wait_for_inferior (); | |
1993 | } | |
1994 | while (stop_signal != TARGET_SIGNAL_TRAP); | |
1995 | stop_soon_quietly = 0; | |
1996 | ||
1997 | #if !defined(_SCO_DS) | |
1998 | /* We are now either at the "mapping complete" breakpoint (or somewhere | |
1999 | else, a condition we aren't prepared to deal with anyway), so adjust | |
2000 | the PC as necessary after a breakpoint, disable the breakpoint, and | |
2001 | add any shared libraries that were mapped in. */ | |
2002 | ||
2003 | if (DECR_PC_AFTER_BREAK) | |
2004 | { | |
2005 | stop_pc -= DECR_PC_AFTER_BREAK; | |
2006 | write_register (PC_REGNUM, stop_pc); | |
2007 | } | |
2008 | ||
2009 | if (!disable_break ()) | |
2010 | { | |
2011 | warning ("shared library handler failed to disable breakpoint"); | |
2012 | } | |
2013 | ||
2014 | if (auto_solib_add) | |
2015 | solib_add ((char *) 0, 0, (struct target_ops *) 0); | |
2016 | #endif /* ! _SCO_DS */ | |
2017 | #endif | |
2018 | } | |
2019 | ||
2020 | /* | |
2021 | ||
c5aa993b | 2022 | LOCAL FUNCTION |
c906108c | 2023 | |
c5aa993b | 2024 | special_symbol_handling -- additional shared library symbol handling |
c906108c | 2025 | |
c5aa993b | 2026 | SYNOPSIS |
c906108c | 2027 | |
07cd4b97 | 2028 | void special_symbol_handling () |
c906108c | 2029 | |
c5aa993b | 2030 | DESCRIPTION |
c906108c | 2031 | |
c5aa993b JM |
2032 | Once the symbols from a shared object have been loaded in the usual |
2033 | way, we are called to do any system specific symbol handling that | |
2034 | is needed. | |
c906108c | 2035 | |
c5aa993b JM |
2036 | For SunOS4, this consists of grunging around in the dynamic |
2037 | linkers structures to find symbol definitions for "common" symbols | |
2038 | and adding them to the minimal symbol table for the runtime common | |
2039 | objfile. | |
c906108c | 2040 | |
c5aa993b | 2041 | */ |
c906108c SS |
2042 | |
2043 | static void | |
fba45db2 | 2044 | special_symbol_handling (void) |
c906108c SS |
2045 | { |
2046 | #ifndef SVR4_SHARED_LIBS | |
2047 | int j; | |
2048 | ||
2049 | if (debug_addr == 0) | |
2050 | { | |
2051 | /* Get link_dynamic structure */ | |
2052 | ||
2053 | j = target_read_memory (debug_base, (char *) &dynamic_copy, | |
2054 | sizeof (dynamic_copy)); | |
2055 | if (j) | |
2056 | { | |
2057 | /* unreadable */ | |
2058 | return; | |
2059 | } | |
2060 | ||
2061 | /* Calc address of debugger interface structure */ | |
2062 | /* FIXME, this needs work for cross-debugging of core files | |
c5aa993b | 2063 | (byteorder, size, alignment, etc). */ |
c906108c | 2064 | |
07cd4b97 | 2065 | debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd); |
c906108c SS |
2066 | } |
2067 | ||
2068 | /* Read the debugger structure from the inferior, just to make sure | |
2069 | we have a current copy. */ | |
2070 | ||
2071 | j = target_read_memory (debug_addr, (char *) &debug_copy, | |
2072 | sizeof (debug_copy)); | |
2073 | if (j) | |
c5aa993b | 2074 | return; /* unreadable */ |
c906108c SS |
2075 | |
2076 | /* Get common symbol definitions for the loaded object. */ | |
2077 | ||
2078 | if (debug_copy.ldd_cp) | |
2079 | { | |
07cd4b97 | 2080 | solib_add_common_symbols (SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_cp)); |
c906108c SS |
2081 | } |
2082 | ||
c5aa993b | 2083 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
2084 | } |
2085 | ||
2086 | ||
2087 | /* | |
2088 | ||
c5aa993b | 2089 | LOCAL FUNCTION |
c906108c | 2090 | |
c5aa993b | 2091 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 2092 | |
c5aa993b | 2093 | SYNOPSIS |
c906108c | 2094 | |
c5aa993b | 2095 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 2096 | |
c5aa993b | 2097 | DESCRIPTION |
c906108c | 2098 | |
c5aa993b | 2099 | */ |
c906108c SS |
2100 | |
2101 | static void | |
fba45db2 | 2102 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
2103 | { |
2104 | dont_repeat (); | |
2105 | solib_add (args, from_tty, (struct target_ops *) 0); | |
2106 | } | |
2107 | ||
2108 | #endif /* HAVE_LINK_H */ | |
2109 | ||
2110 | void | |
fba45db2 | 2111 | _initialize_solib (void) |
c906108c SS |
2112 | { |
2113 | #ifdef HAVE_LINK_H | |
2114 | ||
2115 | add_com ("sharedlibrary", class_files, sharedlibrary_command, | |
2116 | "Load shared object library symbols for files matching REGEXP."); | |
c5aa993b | 2117 | add_info ("sharedlibrary", info_sharedlibrary_command, |
c906108c SS |
2118 | "Status of loaded shared object libraries."); |
2119 | ||
2120 | add_show_from_set | |
2121 | (add_set_cmd ("auto-solib-add", class_support, var_zinteger, | |
2122 | (char *) &auto_solib_add, | |
2123 | "Set autoloading of shared library symbols.\n\ | |
2124 | If nonzero, symbols from all shared object libraries will be loaded\n\ | |
2125 | automatically when the inferior begins execution or when the dynamic linker\n\ | |
2126 | informs gdb that a new library has been loaded. Otherwise, symbols\n\ | |
2127 | must be loaded manually, using `sharedlibrary'.", | |
2128 | &setlist), | |
2129 | &showlist); | |
2130 | ||
2131 | add_show_from_set | |
2132 | (add_set_cmd ("solib-absolute-prefix", class_support, var_filename, | |
2133 | (char *) &solib_absolute_prefix, | |
2134 | "Set prefix for loading absolute shared library symbol files.\n\ | |
2135 | For other (relative) files, you can add values using `set solib-search-path'.", | |
2136 | &setlist), | |
2137 | &showlist); | |
2138 | add_show_from_set | |
2139 | (add_set_cmd ("solib-search-path", class_support, var_string, | |
2140 | (char *) &solib_search_path, | |
2141 | "Set the search path for loading non-absolute shared library symbol files.\n\ | |
2142 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.", | |
2143 | &setlist), | |
2144 | &showlist); | |
2145 | ||
2146 | #endif /* HAVE_LINK_H */ | |
2147 | } |