Commit | Line | Data |
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c906108c | 1 | /* Handle SunOS and SVR4 shared libraries for GDB, the GNU Debugger. |
8554b7d5 | 2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 98, 1999, 2000 |
c906108c | 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 | } | |
8554b7d5 MK |
531 | |
532 | if (symaddr) | |
533 | return symaddr; | |
534 | ||
535 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
536 | have to check the dynamic string table too. */ | |
537 | ||
538 | storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
539 | ||
540 | if (storage_needed > 0) | |
541 | { | |
542 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
543 | back_to = make_cleanup (free, (PTR) symbol_table); | |
544 | number_of_symbols = bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
545 | ||
546 | for (i = 0; i < number_of_symbols; i++) | |
547 | { | |
548 | sym = *symbol_table++; | |
549 | if (STREQ (sym->name, symname)) | |
550 | { | |
551 | /* Bfd symbols are section relative. */ | |
552 | symaddr = sym->value + sym->section->vma; | |
553 | break; | |
554 | } | |
555 | } | |
556 | do_cleanups (back_to); | |
557 | } | |
558 | ||
559 | return symaddr; | |
c906108c SS |
560 | } |
561 | ||
562 | #ifdef HANDLE_SVR4_EXEC_EMULATORS | |
563 | ||
564 | /* | |
c5aa993b JM |
565 | Solaris BCP (the part of Solaris which allows it to run SunOS4 |
566 | a.out files) throws in another wrinkle. Solaris does not fill | |
567 | in the usual a.out link map structures when running BCP programs, | |
568 | the only way to get at them is via groping around in the dynamic | |
569 | linker. | |
570 | The dynamic linker and it's structures are located in the shared | |
571 | C library, which gets run as the executable's "interpreter" by | |
572 | the kernel. | |
573 | ||
574 | Note that we can assume nothing about the process state at the time | |
575 | we need to find these structures. We may be stopped on the first | |
576 | instruction of the interpreter (C shared library), the first | |
577 | instruction of the executable itself, or somewhere else entirely | |
578 | (if we attached to the process for example). | |
579 | */ | |
580 | ||
581 | static char *debug_base_symbols[] = | |
582 | { | |
583 | "r_debug", /* Solaris 2.3 */ | |
584 | "_r_debug", /* Solaris 2.1, 2.2 */ | |
c906108c SS |
585 | NULL |
586 | }; | |
587 | ||
a14ed312 | 588 | static int look_for_base (int, CORE_ADDR); |
c906108c SS |
589 | |
590 | /* | |
591 | ||
c5aa993b | 592 | LOCAL FUNCTION |
c906108c | 593 | |
c5aa993b | 594 | look_for_base -- examine file for each mapped address segment |
c906108c | 595 | |
c5aa993b | 596 | SYNOPSYS |
c906108c | 597 | |
c5aa993b | 598 | static int look_for_base (int fd, CORE_ADDR baseaddr) |
c906108c | 599 | |
c5aa993b | 600 | DESCRIPTION |
c906108c | 601 | |
c5aa993b JM |
602 | This function is passed to proc_iterate_over_mappings, which |
603 | causes it to get called once for each mapped address space, with | |
604 | an open file descriptor for the file mapped to that space, and the | |
605 | base address of that mapped space. | |
c906108c | 606 | |
c5aa993b JM |
607 | Our job is to find the debug base symbol in the file that this |
608 | fd is open on, if it exists, and if so, initialize the dynamic | |
609 | linker structure base address debug_base. | |
c906108c | 610 | |
c5aa993b JM |
611 | Note that this is a computationally expensive proposition, since |
612 | we basically have to open a bfd on every call, so we specifically | |
613 | avoid opening the exec file. | |
c906108c SS |
614 | */ |
615 | ||
616 | static int | |
fba45db2 | 617 | look_for_base (int fd, CORE_ADDR baseaddr) |
c906108c SS |
618 | { |
619 | bfd *interp_bfd; | |
620 | CORE_ADDR address = 0; | |
621 | char **symbolp; | |
622 | ||
623 | /* If the fd is -1, then there is no file that corresponds to this | |
624 | mapped memory segment, so skip it. Also, if the fd corresponds | |
625 | to the exec file, skip it as well. */ | |
626 | ||
627 | if (fd == -1 | |
628 | || (exec_bfd != NULL | |
c5aa993b | 629 | && fdmatch (fileno ((FILE *) (exec_bfd->iostream)), fd))) |
c906108c SS |
630 | { |
631 | return (0); | |
632 | } | |
633 | ||
634 | /* Try to open whatever random file this fd corresponds to. Note that | |
635 | we have no way currently to find the filename. Don't gripe about | |
636 | any problems we might have, just fail. */ | |
637 | ||
638 | if ((interp_bfd = bfd_fdopenr ("unnamed", gnutarget, fd)) == NULL) | |
639 | { | |
640 | return (0); | |
641 | } | |
642 | if (!bfd_check_format (interp_bfd, bfd_object)) | |
643 | { | |
644 | /* FIXME-leak: on failure, might not free all memory associated with | |
c5aa993b | 645 | interp_bfd. */ |
c906108c SS |
646 | bfd_close (interp_bfd); |
647 | return (0); | |
648 | } | |
649 | ||
650 | /* Now try to find our debug base symbol in this file, which we at | |
651 | least know to be a valid ELF executable or shared library. */ | |
652 | ||
653 | for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++) | |
654 | { | |
655 | address = bfd_lookup_symbol (interp_bfd, *symbolp); | |
656 | if (address != 0) | |
657 | { | |
658 | break; | |
659 | } | |
660 | } | |
661 | if (address == 0) | |
662 | { | |
663 | /* FIXME-leak: on failure, might not free all memory associated with | |
c5aa993b | 664 | interp_bfd. */ |
c906108c SS |
665 | bfd_close (interp_bfd); |
666 | return (0); | |
667 | } | |
668 | ||
669 | /* Eureka! We found the symbol. But now we may need to relocate it | |
670 | by the base address. If the symbol's value is less than the base | |
671 | address of the shared library, then it hasn't yet been relocated | |
672 | by the dynamic linker, and we have to do it ourself. FIXME: Note | |
673 | that we make the assumption that the first segment that corresponds | |
674 | to the shared library has the base address to which the library | |
675 | was relocated. */ | |
676 | ||
677 | if (address < baseaddr) | |
678 | { | |
679 | address += baseaddr; | |
680 | } | |
681 | debug_base = address; | |
682 | /* FIXME-leak: on failure, might not free all memory associated with | |
683 | interp_bfd. */ | |
684 | bfd_close (interp_bfd); | |
685 | return (1); | |
686 | } | |
687 | #endif /* HANDLE_SVR4_EXEC_EMULATORS */ | |
688 | ||
689 | /* | |
690 | ||
c5aa993b | 691 | LOCAL FUNCTION |
c906108c | 692 | |
c5aa993b JM |
693 | elf_locate_base -- locate the base address of dynamic linker structs |
694 | for SVR4 elf targets. | |
c906108c | 695 | |
c5aa993b | 696 | SYNOPSIS |
c906108c | 697 | |
c5aa993b | 698 | CORE_ADDR elf_locate_base (void) |
c906108c | 699 | |
c5aa993b | 700 | DESCRIPTION |
c906108c | 701 | |
c5aa993b JM |
702 | For SVR4 elf targets the address of the dynamic linker's runtime |
703 | structure is contained within the dynamic info section in the | |
704 | executable file. The dynamic section is also mapped into the | |
705 | inferior address space. Because the runtime loader fills in the | |
706 | real address before starting the inferior, we have to read in the | |
707 | dynamic info section from the inferior address space. | |
708 | If there are any errors while trying to find the address, we | |
709 | silently return 0, otherwise the found address is returned. | |
c906108c SS |
710 | |
711 | */ | |
712 | ||
713 | static CORE_ADDR | |
fba45db2 | 714 | elf_locate_base (void) |
c906108c SS |
715 | { |
716 | sec_ptr dyninfo_sect; | |
717 | int dyninfo_sect_size; | |
718 | CORE_ADDR dyninfo_addr; | |
719 | char *buf; | |
720 | char *bufend; | |
f5b8946c | 721 | int arch_size; |
c906108c SS |
722 | |
723 | /* Find the start address of the .dynamic section. */ | |
724 | dyninfo_sect = bfd_get_section_by_name (exec_bfd, ".dynamic"); | |
725 | if (dyninfo_sect == NULL) | |
726 | return 0; | |
727 | dyninfo_addr = bfd_section_vma (exec_bfd, dyninfo_sect); | |
728 | ||
729 | /* Read in .dynamic section, silently ignore errors. */ | |
730 | dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect); | |
731 | buf = alloca (dyninfo_sect_size); | |
732 | if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size)) | |
733 | return 0; | |
734 | ||
735 | /* Find the DT_DEBUG entry in the the .dynamic section. | |
736 | For mips elf we look for DT_MIPS_RLD_MAP, mips elf apparently has | |
737 | no DT_DEBUG entries. */ | |
f5b8946c | 738 | |
6ceadee4 | 739 | arch_size = bfd_get_arch_size (exec_bfd); |
f5b8946c MS |
740 | if (arch_size == -1) /* failure */ |
741 | return 0; | |
742 | ||
743 | if (arch_size == 32) | |
744 | { /* 32-bit elf */ | |
745 | for (bufend = buf + dyninfo_sect_size; | |
746 | buf < bufend; | |
747 | buf += sizeof (Elf32_External_Dyn)) | |
c906108c | 748 | { |
f5b8946c MS |
749 | Elf32_External_Dyn *x_dynp = (Elf32_External_Dyn *) buf; |
750 | long dyn_tag; | |
751 | CORE_ADDR dyn_ptr; | |
752 | ||
753 | dyn_tag = bfd_h_get_32 (exec_bfd, (bfd_byte *) x_dynp->d_tag); | |
754 | if (dyn_tag == DT_NULL) | |
755 | break; | |
756 | else if (dyn_tag == DT_DEBUG) | |
757 | { | |
758 | dyn_ptr = bfd_h_get_32 (exec_bfd, | |
759 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
760 | return dyn_ptr; | |
761 | } | |
c906108c | 762 | #ifdef DT_MIPS_RLD_MAP |
f5b8946c MS |
763 | else if (dyn_tag == DT_MIPS_RLD_MAP) |
764 | { | |
35fc8285 | 765 | char *pbuf; |
f5b8946c | 766 | |
35fc8285 | 767 | pbuf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT); |
f5b8946c MS |
768 | /* DT_MIPS_RLD_MAP contains a pointer to the address |
769 | of the dynamic link structure. */ | |
770 | dyn_ptr = bfd_h_get_32 (exec_bfd, | |
771 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
772 | if (target_read_memory (dyn_ptr, pbuf, sizeof (pbuf))) | |
773 | return 0; | |
774 | return extract_unsigned_integer (pbuf, sizeof (pbuf)); | |
775 | } | |
c906108c | 776 | #endif |
f5b8946c | 777 | } |
c906108c | 778 | } |
f5b8946c | 779 | else /* 64-bit elf */ |
c906108c | 780 | { |
f5b8946c MS |
781 | for (bufend = buf + dyninfo_sect_size; |
782 | buf < bufend; | |
783 | buf += sizeof (Elf64_External_Dyn)) | |
c906108c | 784 | { |
f5b8946c MS |
785 | Elf64_External_Dyn *x_dynp = (Elf64_External_Dyn *) buf; |
786 | long dyn_tag; | |
787 | CORE_ADDR dyn_ptr; | |
788 | ||
789 | dyn_tag = bfd_h_get_64 (exec_bfd, (bfd_byte *) x_dynp->d_tag); | |
790 | if (dyn_tag == DT_NULL) | |
791 | break; | |
792 | else if (dyn_tag == DT_DEBUG) | |
793 | { | |
794 | dyn_ptr = bfd_h_get_64 (exec_bfd, | |
795 | (bfd_byte *) x_dynp->d_un.d_ptr); | |
796 | return dyn_ptr; | |
797 | } | |
c906108c SS |
798 | } |
799 | } | |
c906108c SS |
800 | |
801 | /* DT_DEBUG entry not found. */ | |
802 | return 0; | |
803 | } | |
804 | ||
c5aa993b | 805 | #endif /* SVR4_SHARED_LIBS */ |
c906108c SS |
806 | |
807 | /* | |
808 | ||
c5aa993b | 809 | LOCAL FUNCTION |
c906108c | 810 | |
c5aa993b | 811 | locate_base -- locate the base address of dynamic linker structs |
c906108c | 812 | |
c5aa993b | 813 | SYNOPSIS |
c906108c | 814 | |
c5aa993b | 815 | CORE_ADDR locate_base (void) |
c906108c | 816 | |
c5aa993b | 817 | DESCRIPTION |
c906108c | 818 | |
c5aa993b JM |
819 | For both the SunOS and SVR4 shared library implementations, if the |
820 | inferior executable has been linked dynamically, there is a single | |
821 | address somewhere in the inferior's data space which is the key to | |
822 | locating all of the dynamic linker's runtime structures. This | |
823 | address is the value of the debug base symbol. The job of this | |
824 | function is to find and return that address, or to return 0 if there | |
825 | is no such address (the executable is statically linked for example). | |
c906108c | 826 | |
c5aa993b JM |
827 | For SunOS, the job is almost trivial, since the dynamic linker and |
828 | all of it's structures are statically linked to the executable at | |
829 | link time. Thus the symbol for the address we are looking for has | |
830 | already been added to the minimal symbol table for the executable's | |
831 | objfile at the time the symbol file's symbols were read, and all we | |
832 | have to do is look it up there. Note that we explicitly do NOT want | |
833 | to find the copies in the shared library. | |
c906108c | 834 | |
c5aa993b JM |
835 | The SVR4 version is a bit more complicated because the address |
836 | is contained somewhere in the dynamic info section. We have to go | |
837 | to a lot more work to discover the address of the debug base symbol. | |
838 | Because of this complexity, we cache the value we find and return that | |
839 | value on subsequent invocations. Note there is no copy in the | |
840 | executable symbol tables. | |
c906108c SS |
841 | |
842 | */ | |
843 | ||
844 | static CORE_ADDR | |
fba45db2 | 845 | locate_base (void) |
c906108c SS |
846 | { |
847 | ||
848 | #ifndef SVR4_SHARED_LIBS | |
849 | ||
850 | struct minimal_symbol *msymbol; | |
851 | CORE_ADDR address = 0; | |
852 | char **symbolp; | |
853 | ||
854 | /* For SunOS, we want to limit the search for the debug base symbol to the | |
855 | executable being debugged, since there is a duplicate named symbol in the | |
856 | shared library. We don't want the shared library versions. */ | |
857 | ||
858 | for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++) | |
859 | { | |
860 | msymbol = lookup_minimal_symbol (*symbolp, NULL, symfile_objfile); | |
861 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) | |
862 | { | |
863 | address = SYMBOL_VALUE_ADDRESS (msymbol); | |
864 | return (address); | |
865 | } | |
866 | } | |
867 | return (0); | |
868 | ||
c5aa993b | 869 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
870 | |
871 | /* Check to see if we have a currently valid address, and if so, avoid | |
872 | doing all this work again and just return the cached address. If | |
873 | we have no cached address, try to locate it in the dynamic info | |
874 | section for ELF executables. */ | |
875 | ||
876 | if (debug_base == 0) | |
877 | { | |
878 | if (exec_bfd != NULL | |
879 | && bfd_get_flavour (exec_bfd) == bfd_target_elf_flavour) | |
880 | debug_base = elf_locate_base (); | |
881 | #ifdef HANDLE_SVR4_EXEC_EMULATORS | |
882 | /* Try it the hard way for emulated executables. */ | |
883 | else if (inferior_pid != 0 && target_has_execution) | |
884 | proc_iterate_over_mappings (look_for_base); | |
885 | #endif | |
886 | } | |
887 | return (debug_base); | |
888 | ||
c5aa993b | 889 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
890 | |
891 | } | |
892 | ||
893 | /* | |
894 | ||
c5aa993b | 895 | LOCAL FUNCTION |
c906108c | 896 | |
c5aa993b | 897 | first_link_map_member -- locate first member in dynamic linker's map |
c906108c | 898 | |
c5aa993b | 899 | SYNOPSIS |
c906108c | 900 | |
07cd4b97 | 901 | static CORE_ADDR first_link_map_member (void) |
c906108c | 902 | |
c5aa993b | 903 | DESCRIPTION |
c906108c | 904 | |
9ddea9f1 JB |
905 | Find the first element in the inferior's dynamic link map, and |
906 | return its address in the inferior. This function doesn't copy the | |
07cd4b97 | 907 | link map entry itself into our address space; current_sos actually |
9ddea9f1 | 908 | does the reading. */ |
c906108c | 909 | |
07cd4b97 | 910 | static CORE_ADDR |
fba45db2 | 911 | first_link_map_member (void) |
c906108c | 912 | { |
07cd4b97 | 913 | CORE_ADDR lm = 0; |
c906108c SS |
914 | |
915 | #ifndef SVR4_SHARED_LIBS | |
916 | ||
917 | read_memory (debug_base, (char *) &dynamic_copy, sizeof (dynamic_copy)); | |
918 | if (dynamic_copy.ld_version >= 2) | |
919 | { | |
920 | /* It is a version that we can deal with, so read in the secondary | |
c5aa993b | 921 | structure and find the address of the link map list from it. */ |
07cd4b97 JB |
922 | read_memory (SOLIB_EXTRACT_ADDRESS (dynamic_copy.ld_un.ld_2), |
923 | (char *) &ld_2_copy, sizeof (struct link_dynamic_2)); | |
924 | lm = SOLIB_EXTRACT_ADDRESS (ld_2_copy.ld_loaded); | |
c906108c SS |
925 | } |
926 | ||
c5aa993b | 927 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
928 | |
929 | read_memory (debug_base, (char *) &debug_copy, sizeof (struct r_debug)); | |
930 | /* FIXME: Perhaps we should validate the info somehow, perhaps by | |
931 | checking r_version for a known version number, or r_state for | |
932 | RT_CONSISTENT. */ | |
07cd4b97 | 933 | lm = SOLIB_EXTRACT_ADDRESS (debug_copy.r_map); |
c906108c | 934 | |
c5aa993b | 935 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
936 | |
937 | return (lm); | |
938 | } | |
939 | ||
104c1213 JM |
940 | #ifdef SVR4_SHARED_LIBS |
941 | /* | |
942 | ||
943 | LOCAL FUNCTION | |
944 | ||
9452d09b | 945 | open_symbol_file_object |
104c1213 JM |
946 | |
947 | SYNOPSIS | |
948 | ||
949 | void open_symbol_file_object (int from_tty) | |
950 | ||
951 | DESCRIPTION | |
952 | ||
953 | If no open symbol file, attempt to locate and open the main symbol | |
954 | file. On SVR4 systems, this is the first link map entry. If its | |
955 | name is here, we can open it. Useful when attaching to a process | |
956 | without first loading its symbol file. | |
957 | ||
958 | */ | |
959 | ||
9452d09b MS |
960 | static int |
961 | open_symbol_file_object (from_ttyp) | |
962 | int *from_ttyp; /* sneak past catch_errors */ | |
104c1213 | 963 | { |
07cd4b97 JB |
964 | CORE_ADDR lm; |
965 | struct link_map lmcopy; | |
104c1213 JM |
966 | char *filename; |
967 | int errcode; | |
968 | ||
969 | if (symfile_objfile) | |
970 | if (!query ("Attempt to reload symbols from process? ")) | |
971 | return 0; | |
972 | ||
973 | if ((debug_base = locate_base ()) == 0) | |
974 | return 0; /* failed somehow... */ | |
975 | ||
976 | /* First link map member should be the executable. */ | |
07cd4b97 | 977 | if ((lm = first_link_map_member ()) == 0) |
104c1213 JM |
978 | return 0; /* failed somehow... */ |
979 | ||
980 | /* Read from target memory to GDB. */ | |
07cd4b97 | 981 | read_memory (lm, (void *) &lmcopy, sizeof (lmcopy)); |
104c1213 JM |
982 | |
983 | if (lmcopy.l_name == 0) | |
984 | return 0; /* no filename. */ | |
985 | ||
986 | /* Now fetch the filename from target memory. */ | |
07cd4b97 | 987 | target_read_string (SOLIB_EXTRACT_ADDRESS (lmcopy.l_name), &filename, |
104c1213 JM |
988 | MAX_PATH_SIZE - 1, &errcode); |
989 | if (errcode) | |
990 | { | |
991 | warning ("failed to read exec filename from attached file: %s", | |
992 | safe_strerror (errcode)); | |
993 | return 0; | |
994 | } | |
995 | ||
74b7792f | 996 | make_cleanup (free, filename); |
104c1213 | 997 | /* Have a pathname: read the symbol file. */ |
9452d09b | 998 | symbol_file_command (filename, *from_ttyp); |
104c1213 JM |
999 | |
1000 | return 1; | |
1001 | } | |
1002 | #endif /* SVR4_SHARED_LIBS */ | |
1003 | ||
c906108c | 1004 | |
07cd4b97 | 1005 | /* LOCAL FUNCTION |
c906108c | 1006 | |
07cd4b97 | 1007 | free_so --- free a `struct so_list' object |
c906108c | 1008 | |
c5aa993b | 1009 | SYNOPSIS |
c906108c | 1010 | |
07cd4b97 | 1011 | void free_so (struct so_list *so) |
c906108c | 1012 | |
c5aa993b | 1013 | DESCRIPTION |
c906108c | 1014 | |
07cd4b97 JB |
1015 | Free the storage associated with the `struct so_list' object SO. |
1016 | If we have opened a BFD for SO, close it. | |
c906108c | 1017 | |
07cd4b97 JB |
1018 | The caller is responsible for removing SO from whatever list it is |
1019 | a member of. If we have placed SO's sections in some target's | |
1020 | section table, the caller is responsible for removing them. | |
c906108c | 1021 | |
07cd4b97 JB |
1022 | This function doesn't mess with objfiles at all. If there is an |
1023 | objfile associated with SO that needs to be removed, the caller is | |
1024 | responsible for taking care of that. */ | |
1025 | ||
1026 | static void | |
1027 | free_so (struct so_list *so) | |
c906108c | 1028 | { |
07cd4b97 | 1029 | char *bfd_filename = 0; |
c5aa993b | 1030 | |
07cd4b97 JB |
1031 | if (so->sections) |
1032 | free (so->sections); | |
1033 | ||
1034 | if (so->abfd) | |
c906108c | 1035 | { |
07cd4b97 JB |
1036 | bfd_filename = bfd_get_filename (so->abfd); |
1037 | if (! bfd_close (so->abfd)) | |
1038 | warning ("cannot close \"%s\": %s", | |
1039 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
c906108c | 1040 | } |
07cd4b97 JB |
1041 | |
1042 | if (bfd_filename) | |
1043 | free (bfd_filename); | |
1044 | ||
1045 | free (so); | |
1046 | } | |
1047 | ||
1048 | ||
1049 | /* On some systems, the only way to recognize the link map entry for | |
1050 | the main executable file is by looking at its name. Return | |
1051 | non-zero iff SONAME matches one of the known main executable names. */ | |
1052 | ||
1053 | static int | |
fba45db2 | 1054 | match_main (char *soname) |
07cd4b97 JB |
1055 | { |
1056 | char **mainp; | |
1057 | ||
1058 | for (mainp = main_name_list; *mainp != NULL; mainp++) | |
c906108c | 1059 | { |
07cd4b97 JB |
1060 | if (strcmp (soname, *mainp) == 0) |
1061 | return (1); | |
c906108c | 1062 | } |
07cd4b97 JB |
1063 | |
1064 | return (0); | |
1065 | } | |
1066 | ||
1067 | ||
1068 | /* LOCAL FUNCTION | |
1069 | ||
1070 | current_sos -- build a list of currently loaded shared objects | |
1071 | ||
1072 | SYNOPSIS | |
1073 | ||
1074 | struct so_list *current_sos () | |
1075 | ||
1076 | DESCRIPTION | |
1077 | ||
1078 | Build a list of `struct so_list' objects describing the shared | |
1079 | objects currently loaded in the inferior. This list does not | |
1080 | include an entry for the main executable file. | |
1081 | ||
1082 | Note that we only gather information directly available from the | |
1083 | inferior --- we don't examine any of the shared library files | |
1084 | themselves. The declaration of `struct so_list' says which fields | |
1085 | we provide values for. */ | |
1086 | ||
1087 | static struct so_list * | |
fba45db2 | 1088 | current_sos (void) |
07cd4b97 JB |
1089 | { |
1090 | CORE_ADDR lm; | |
1091 | struct so_list *head = 0; | |
1092 | struct so_list **link_ptr = &head; | |
1093 | ||
1094 | /* Make sure we've looked up the inferior's dynamic linker's base | |
1095 | structure. */ | |
1096 | if (! debug_base) | |
c906108c | 1097 | { |
07cd4b97 JB |
1098 | debug_base = locate_base (); |
1099 | ||
1100 | /* If we can't find the dynamic linker's base structure, this | |
1101 | must not be a dynamically linked executable. Hmm. */ | |
1102 | if (! debug_base) | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | /* Walk the inferior's link map list, and build our list of | |
1107 | `struct so_list' nodes. */ | |
1108 | lm = first_link_map_member (); | |
1109 | while (lm) | |
1110 | { | |
1111 | struct so_list *new | |
1112 | = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
15588ebb | 1113 | struct cleanup *old_chain = make_cleanup (free, new); |
07cd4b97 JB |
1114 | memset (new, 0, sizeof (*new)); |
1115 | ||
c5aa993b | 1116 | new->lmaddr = lm; |
07cd4b97 | 1117 | read_memory (lm, (char *) &(new->lm), sizeof (struct link_map)); |
c906108c | 1118 | |
07cd4b97 | 1119 | lm = LM_NEXT (new); |
c5aa993b | 1120 | |
c906108c | 1121 | /* For SVR4 versions, the first entry in the link map is for the |
c5aa993b JM |
1122 | inferior executable, so we must ignore it. For some versions of |
1123 | SVR4, it has no name. For others (Solaris 2.3 for example), it | |
1124 | does have a name, so we can no longer use a missing name to | |
1125 | decide when to ignore it. */ | |
07cd4b97 | 1126 | if (IGNORE_FIRST_LINK_MAP_ENTRY (new)) |
15588ebb | 1127 | free_so (new); |
07cd4b97 | 1128 | else |
c906108c SS |
1129 | { |
1130 | int errcode; | |
1131 | char *buffer; | |
07cd4b97 JB |
1132 | |
1133 | /* Extract this shared object's name. */ | |
1134 | target_read_string (LM_NAME (new), &buffer, | |
c906108c SS |
1135 | MAX_PATH_SIZE - 1, &errcode); |
1136 | if (errcode != 0) | |
1137 | { | |
07cd4b97 | 1138 | warning ("current_sos: Can't read pathname for load map: %s\n", |
c906108c | 1139 | safe_strerror (errcode)); |
c906108c | 1140 | } |
07cd4b97 JB |
1141 | else |
1142 | { | |
1143 | strncpy (new->so_name, buffer, MAX_PATH_SIZE - 1); | |
1144 | new->so_name[MAX_PATH_SIZE - 1] = '\0'; | |
1145 | free (buffer); | |
1146 | strcpy (new->so_original_name, new->so_name); | |
1147 | } | |
1148 | ||
1149 | /* If this entry has no name, or its name matches the name | |
1150 | for the main executable, don't include it in the list. */ | |
1151 | if (! new->so_name[0] | |
1152 | || match_main (new->so_name)) | |
1153 | free_so (new); | |
1154 | else | |
1155 | { | |
1156 | new->next = 0; | |
1157 | *link_ptr = new; | |
1158 | link_ptr = &new->next; | |
1159 | } | |
c5aa993b | 1160 | } |
15588ebb JB |
1161 | |
1162 | discard_cleanups (old_chain); | |
c906108c | 1163 | } |
07cd4b97 JB |
1164 | |
1165 | return head; | |
c906108c SS |
1166 | } |
1167 | ||
07cd4b97 | 1168 | |
c906108c SS |
1169 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
1170 | ||
1171 | static int | |
fba45db2 | 1172 | symbol_add_stub (PTR arg) |
c906108c | 1173 | { |
07cd4b97 | 1174 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 1175 | struct section_addr_info *sap; |
9e124216 EZ |
1176 | CORE_ADDR lowest_addr = 0; |
1177 | int lowest_index; | |
1178 | asection *lowest_sect = NULL; | |
c906108c | 1179 | |
07cd4b97 JB |
1180 | /* Have we already loaded this shared object? */ |
1181 | ALL_OBJFILES (so->objfile) | |
1182 | { | |
1183 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
1184 | return 1; | |
1185 | } | |
1186 | ||
1187 | /* Find the shared object's text segment. */ | |
c5aa993b | 1188 | if (so->textsection) |
9e124216 EZ |
1189 | { |
1190 | lowest_addr = so->textsection->addr; | |
1191 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); | |
1192 | lowest_index = lowest_sect->index; | |
1193 | } | |
c5aa993b | 1194 | else if (so->abfd != NULL) |
c906108c | 1195 | { |
9e124216 EZ |
1196 | /* If we didn't find a mapped non zero sized .text section, set |
1197 | up lowest_addr so that the relocation in symbol_file_add does | |
1198 | no harm. */ | |
c5aa993b | 1199 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); |
c906108c | 1200 | if (lowest_sect == NULL) |
c5aa993b | 1201 | bfd_map_over_sections (so->abfd, find_lowest_section, |
96baa820 | 1202 | (PTR) &lowest_sect); |
c906108c | 1203 | if (lowest_sect) |
9e124216 EZ |
1204 | { |
1205 | lowest_addr = bfd_section_vma (so->abfd, lowest_sect) | |
1206 | + LM_ADDR (so); | |
1207 | lowest_index = lowest_sect->index; | |
1208 | } | |
c906108c | 1209 | } |
c5aa993b | 1210 | |
62557bbc KB |
1211 | sap = build_section_addr_info_from_section_table (so->sections, |
1212 | so->sections_end); | |
e7cf9df1 | 1213 | |
9e124216 EZ |
1214 | sap->other[lowest_index].addr = lowest_addr; |
1215 | ||
62557bbc KB |
1216 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
1217 | sap, 0, OBJF_SHARED); | |
1218 | free_section_addr_info (sap); | |
c906108c | 1219 | |
07cd4b97 | 1220 | return (1); |
c906108c SS |
1221 | } |
1222 | ||
c906108c | 1223 | |
07cd4b97 | 1224 | /* LOCAL FUNCTION |
c906108c | 1225 | |
105b175f | 1226 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 1227 | |
c5aa993b | 1228 | SYNOPSIS |
c906108c | 1229 | |
105b175f | 1230 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 1231 | |
07cd4b97 | 1232 | Extract the list of currently loaded shared objects from the |
105b175f JB |
1233 | inferior, and compare it with the list of shared objects currently |
1234 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
1235 | with the inferior's new list. | |
c906108c | 1236 | |
105b175f JB |
1237 | If we notice that the inferior has unloaded some shared objects, |
1238 | free any symbolic info GDB had read about those shared objects. | |
1239 | ||
1240 | Don't load symbolic info for any new shared objects; just add them | |
1241 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
1242 | |
1243 | If FROM_TTY is non-null, feel free to print messages about what | |
1244 | we're doing. | |
c906108c | 1245 | |
07cd4b97 JB |
1246 | If TARGET is non-null, add the sections of all new shared objects |
1247 | to TARGET's section table. Note that this doesn't remove any | |
1248 | sections for shared objects that have been unloaded, and it | |
1249 | doesn't check to see if the new shared objects are already present in | |
1250 | the section table. But we only use this for core files and | |
1251 | processes we've just attached to, so that's okay. */ | |
c906108c | 1252 | |
07cd4b97 | 1253 | void |
105b175f | 1254 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 JB |
1255 | { |
1256 | struct so_list *inferior = current_sos (); | |
1257 | struct so_list *gdb, **gdb_link; | |
1258 | ||
104c1213 JM |
1259 | #ifdef SVR4_SHARED_LIBS |
1260 | /* If we are attaching to a running process for which we | |
1261 | have not opened a symbol file, we may be able to get its | |
1262 | symbols now! */ | |
1263 | if (attach_flag && | |
1264 | symfile_objfile == NULL) | |
9452d09b | 1265 | catch_errors (open_symbol_file_object, (PTR) &from_tty, |
104c1213 JM |
1266 | "Error reading attached process's symbol file.\n", |
1267 | RETURN_MASK_ALL); | |
1268 | ||
1269 | #endif SVR4_SHARED_LIBS | |
1270 | ||
07cd4b97 JB |
1271 | /* Since this function might actually add some elements to the |
1272 | so_list_head list, arrange for it to be cleaned up when | |
1273 | appropriate. */ | |
1274 | if (!solib_cleanup_queued) | |
1275 | { | |
1276 | make_run_cleanup (do_clear_solib, NULL); | |
1277 | solib_cleanup_queued = 1; | |
c906108c | 1278 | } |
c5aa993b | 1279 | |
07cd4b97 JB |
1280 | /* GDB and the inferior's dynamic linker each maintain their own |
1281 | list of currently loaded shared objects; we want to bring the | |
1282 | former in sync with the latter. Scan both lists, seeing which | |
1283 | shared objects appear where. There are three cases: | |
1284 | ||
1285 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
1286 | knows about it already, and it's still loaded in the inferior. |
1287 | Nothing needs to happen. | |
07cd4b97 JB |
1288 | |
1289 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
1290 | the inferior has unloaded it. We should remove the shared |
1291 | object from GDB's tables. | |
07cd4b97 JB |
1292 | |
1293 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
1294 | means that it's just been loaded. We should add it to GDB's |
1295 | tables. | |
07cd4b97 JB |
1296 | |
1297 | So we walk GDB's list, checking each entry to see if it appears | |
1298 | in the inferior's list too. If it does, no action is needed, and | |
1299 | we remove it from the inferior's list. If it doesn't, the | |
1300 | inferior has unloaded it, and we remove it from GDB's list. By | |
1301 | the time we're done walking GDB's list, the inferior's list | |
1302 | contains only the new shared objects, which we then add. */ | |
1303 | ||
1304 | gdb = so_list_head; | |
1305 | gdb_link = &so_list_head; | |
1306 | while (gdb) | |
c906108c | 1307 | { |
07cd4b97 JB |
1308 | struct so_list *i = inferior; |
1309 | struct so_list **i_link = &inferior; | |
1310 | ||
1311 | /* Check to see whether the shared object *gdb also appears in | |
1312 | the inferior's current list. */ | |
1313 | while (i) | |
c906108c | 1314 | { |
07cd4b97 JB |
1315 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
1316 | break; | |
1317 | ||
1318 | i_link = &i->next; | |
1319 | i = *i_link; | |
c906108c | 1320 | } |
c5aa993b | 1321 | |
07cd4b97 JB |
1322 | /* If the shared object appears on the inferior's list too, then |
1323 | it's still loaded, so we don't need to do anything. Delete | |
1324 | it from the inferior's list, and leave it on GDB's list. */ | |
1325 | if (i) | |
c906108c | 1326 | { |
07cd4b97 | 1327 | *i_link = i->next; |
07cd4b97 JB |
1328 | free_so (i); |
1329 | gdb_link = &gdb->next; | |
1330 | gdb = *gdb_link; | |
1331 | } | |
1332 | ||
1333 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
1334 | else | |
1335 | { | |
1336 | *gdb_link = gdb->next; | |
07cd4b97 JB |
1337 | |
1338 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 1339 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
1340 | free_objfile (gdb->objfile); |
1341 | ||
1342 | /* Some targets' section tables might be referring to | |
1343 | sections from so->abfd; remove them. */ | |
1344 | remove_target_sections (gdb->abfd); | |
1345 | ||
1346 | free_so (gdb); | |
1347 | gdb = *gdb_link; | |
c906108c SS |
1348 | } |
1349 | } | |
c5aa993b | 1350 | |
07cd4b97 JB |
1351 | /* Now the inferior's list contains only shared objects that don't |
1352 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 1353 | to GDB's shared object list. */ |
07cd4b97 | 1354 | if (inferior) |
c906108c | 1355 | { |
07cd4b97 JB |
1356 | struct so_list *i; |
1357 | ||
1358 | /* Add the new shared objects to GDB's list. */ | |
1359 | *gdb_link = inferior; | |
1360 | ||
e8930304 | 1361 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 1362 | for (i = inferior; i; i = i->next) |
c906108c | 1363 | { |
07cd4b97 JB |
1364 | i->from_tty = from_tty; |
1365 | ||
1366 | /* Fill in the rest of the `struct so_list' node. */ | |
1367 | catch_errors (solib_map_sections, i, | |
1368 | "Error while mapping shared library sections:\n", | |
1369 | RETURN_MASK_ALL); | |
07cd4b97 JB |
1370 | } |
1371 | ||
1372 | /* If requested, add the shared objects' sections to the the | |
1373 | TARGET's section table. */ | |
1374 | if (target) | |
1375 | { | |
1376 | int new_sections; | |
1377 | ||
1378 | /* Figure out how many sections we'll need to add in total. */ | |
1379 | new_sections = 0; | |
1380 | for (i = inferior; i; i = i->next) | |
1381 | new_sections += (i->sections_end - i->sections); | |
1382 | ||
1383 | if (new_sections > 0) | |
c906108c | 1384 | { |
07cd4b97 JB |
1385 | int space = target_resize_to_sections (target, new_sections); |
1386 | ||
1387 | for (i = inferior; i; i = i->next) | |
1388 | { | |
1389 | int count = (i->sections_end - i->sections); | |
1390 | memcpy (target->to_sections + space, | |
1391 | i->sections, | |
1392 | count * sizeof (i->sections[0])); | |
1393 | space += count; | |
1394 | } | |
c906108c SS |
1395 | } |
1396 | } | |
e8930304 | 1397 | } |
105b175f JB |
1398 | } |
1399 | ||
1400 | ||
1401 | /* GLOBAL FUNCTION | |
1402 | ||
1403 | solib_add -- read in symbol info for newly added shared libraries | |
1404 | ||
1405 | SYNOPSIS | |
1406 | ||
1407 | void solib_add (char *pattern, int from_tty, struct target_ops *TARGET) | |
1408 | ||
1409 | DESCRIPTION | |
1410 | ||
1411 | Read in symbolic information for any shared objects whose names | |
1412 | match PATTERN. (If we've already read a shared object's symbol | |
1413 | info, leave it alone.) If PATTERN is zero, read them all. | |
1414 | ||
1415 | FROM_TTY and TARGET are as described for update_solib_list, above. */ | |
1416 | ||
1417 | void | |
1418 | solib_add (char *pattern, int from_tty, struct target_ops *target) | |
1419 | { | |
1420 | struct so_list *gdb; | |
1421 | ||
1422 | if (pattern) | |
1423 | { | |
1424 | char *re_err = re_comp (pattern); | |
1425 | ||
1426 | if (re_err) | |
1427 | error ("Invalid regexp: %s", re_err); | |
1428 | } | |
1429 | ||
1430 | update_solib_list (from_tty, target); | |
c906108c | 1431 | |
105b175f JB |
1432 | /* Walk the list of currently loaded shared libraries, and read |
1433 | symbols for any that match the pattern --- or any whose symbols | |
1434 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
1435 | { |
1436 | int any_matches = 0; | |
1437 | int loaded_any_symbols = 0; | |
c906108c | 1438 | |
e8930304 JB |
1439 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
1440 | if (! pattern || re_exec (gdb->so_name)) | |
1441 | { | |
1442 | any_matches = 1; | |
1443 | ||
1444 | if (gdb->symbols_loaded) | |
1445 | { | |
1446 | if (from_tty) | |
1447 | printf_unfiltered ("Symbols already loaded for %s\n", | |
1448 | gdb->so_name); | |
1449 | } | |
1450 | else | |
1451 | { | |
1452 | if (catch_errors | |
1453 | (symbol_add_stub, gdb, | |
1454 | "Error while reading shared library symbols:\n", | |
1455 | RETURN_MASK_ALL)) | |
1456 | { | |
1457 | if (from_tty) | |
1458 | printf_unfiltered ("Loaded symbols for %s\n", | |
1459 | gdb->so_name); | |
1460 | gdb->symbols_loaded = 1; | |
1461 | loaded_any_symbols = 1; | |
1462 | } | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | if (from_tty && pattern && ! any_matches) | |
1467 | printf_unfiltered | |
1468 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1469 | ||
1470 | if (loaded_any_symbols) | |
1471 | { | |
1472 | /* Getting new symbols may change our opinion about what is | |
1473 | frameless. */ | |
1474 | reinit_frame_cache (); | |
1475 | ||
1476 | special_symbol_handling (); | |
1477 | } | |
1478 | } | |
c906108c SS |
1479 | } |
1480 | ||
07cd4b97 | 1481 | |
c906108c SS |
1482 | /* |
1483 | ||
c5aa993b | 1484 | LOCAL FUNCTION |
c906108c | 1485 | |
c5aa993b | 1486 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 1487 | |
c5aa993b | 1488 | SYNOPSIS |
c906108c | 1489 | |
c5aa993b | 1490 | static void info_sharedlibrary_command () |
c906108c | 1491 | |
c5aa993b | 1492 | DESCRIPTION |
c906108c | 1493 | |
c5aa993b JM |
1494 | Walk through the shared library list and print information |
1495 | about each attached library. | |
1496 | */ | |
c906108c SS |
1497 | |
1498 | static void | |
fba45db2 | 1499 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 1500 | { |
c5aa993b | 1501 | register struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
1502 | int header_done = 0; |
1503 | int addr_width; | |
1504 | char *addr_fmt; | |
f5b8946c | 1505 | int arch_size; |
c906108c SS |
1506 | |
1507 | if (exec_bfd == NULL) | |
1508 | { | |
4ce44c66 | 1509 | printf_unfiltered ("No executable file.\n"); |
c906108c SS |
1510 | return; |
1511 | } | |
1512 | ||
6ceadee4 | 1513 | arch_size = bfd_get_arch_size (exec_bfd); |
f5b8946c MS |
1514 | /* Default to 32-bit in case of failure (non-elf). */ |
1515 | if (arch_size == 32 || arch_size == -1) | |
1516 | { | |
1517 | addr_width = 8 + 4; | |
1518 | addr_fmt = "08l"; | |
1519 | } | |
1520 | else if (arch_size == 64) | |
1521 | { | |
1522 | addr_width = 16 + 4; | |
1523 | addr_fmt = "016l"; | |
1524 | } | |
c906108c | 1525 | |
105b175f | 1526 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
1527 | |
1528 | for (so = so_list_head; so; so = so->next) | |
c906108c | 1529 | { |
c5aa993b | 1530 | if (so->so_name[0]) |
c906108c SS |
1531 | { |
1532 | if (!header_done) | |
1533 | { | |
c5aa993b JM |
1534 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
1535 | addr_width, "To", "Syms Read", | |
1536 | "Shared Object Library"); | |
c906108c SS |
1537 | header_done++; |
1538 | } | |
1539 | ||
1540 | printf_unfiltered ("%-*s", addr_width, | |
c5aa993b JM |
1541 | local_hex_string_custom ((unsigned long) LM_ADDR (so), |
1542 | addr_fmt)); | |
c906108c | 1543 | printf_unfiltered ("%-*s", addr_width, |
c5aa993b JM |
1544 | local_hex_string_custom ((unsigned long) so->lmend, |
1545 | addr_fmt)); | |
1546 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); | |
1547 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
1548 | } |
1549 | } | |
1550 | if (so_list_head == NULL) | |
1551 | { | |
c5aa993b | 1552 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
c906108c SS |
1553 | } |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | ||
c5aa993b | 1558 | GLOBAL FUNCTION |
c906108c | 1559 | |
c5aa993b | 1560 | solib_address -- check to see if an address is in a shared lib |
c906108c | 1561 | |
c5aa993b | 1562 | SYNOPSIS |
c906108c | 1563 | |
c5aa993b | 1564 | char * solib_address (CORE_ADDR address) |
c906108c | 1565 | |
c5aa993b | 1566 | DESCRIPTION |
c906108c | 1567 | |
c5aa993b JM |
1568 | Provides a hook for other gdb routines to discover whether or |
1569 | not a particular address is within the mapped address space of | |
1570 | a shared library. Any address between the base mapping address | |
1571 | and the first address beyond the end of the last mapping, is | |
1572 | considered to be within the shared library address space, for | |
1573 | our purposes. | |
c906108c | 1574 | |
c5aa993b JM |
1575 | For example, this routine is called at one point to disable |
1576 | breakpoints which are in shared libraries that are not currently | |
1577 | mapped in. | |
c906108c SS |
1578 | */ |
1579 | ||
1580 | char * | |
fba45db2 | 1581 | solib_address (CORE_ADDR address) |
c906108c | 1582 | { |
c5aa993b JM |
1583 | register struct so_list *so = 0; /* link map state variable */ |
1584 | ||
07cd4b97 | 1585 | for (so = so_list_head; so; so = so->next) |
c906108c | 1586 | { |
07cd4b97 JB |
1587 | if (LM_ADDR (so) <= address && address < so->lmend) |
1588 | return (so->so_name); | |
c906108c | 1589 | } |
07cd4b97 | 1590 | |
c906108c SS |
1591 | return (0); |
1592 | } | |
1593 | ||
1594 | /* Called by free_all_symtabs */ | |
1595 | ||
c5aa993b | 1596 | void |
fba45db2 | 1597 | clear_solib (void) |
c906108c | 1598 | { |
085dd6e6 JM |
1599 | /* This function is expected to handle ELF shared libraries. It is |
1600 | also used on Solaris, which can run either ELF or a.out binaries | |
1601 | (for compatibility with SunOS 4), both of which can use shared | |
1602 | libraries. So we don't know whether we have an ELF executable or | |
1603 | an a.out executable until the user chooses an executable file. | |
1604 | ||
1605 | ELF shared libraries don't get mapped into the address space | |
1606 | until after the program starts, so we'd better not try to insert | |
1607 | breakpoints in them immediately. We have to wait until the | |
1608 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
1609 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
1610 | it's ready. | |
1611 | ||
1612 | SunOS shared libraries seem to be different --- they're present | |
1613 | as soon as the process begins execution, so there's no need to | |
1614 | put off inserting breakpoints. There's also nowhere to put a | |
1615 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
1616 | around to it. | |
1617 | ||
1618 | So: disable breakpoints only if we're using ELF shared libs. */ | |
1619 | if (exec_bfd != NULL | |
1620 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
1621 | disable_breakpoints_in_shlibs (1); | |
1622 | ||
c906108c SS |
1623 | while (so_list_head) |
1624 | { | |
07cd4b97 JB |
1625 | struct so_list *so = so_list_head; |
1626 | so_list_head = so->next; | |
1627 | free_so (so); | |
c906108c | 1628 | } |
07cd4b97 | 1629 | |
c906108c SS |
1630 | debug_base = 0; |
1631 | } | |
1632 | ||
1633 | static void | |
fba45db2 | 1634 | do_clear_solib (PTR dummy) |
c906108c SS |
1635 | { |
1636 | solib_cleanup_queued = 0; | |
1637 | clear_solib (); | |
1638 | } | |
1639 | ||
1640 | #ifdef SVR4_SHARED_LIBS | |
1641 | ||
1642 | /* Return 1 if PC lies in the dynamic symbol resolution code of the | |
1643 | SVR4 run time loader. */ | |
1644 | ||
1645 | static CORE_ADDR interp_text_sect_low; | |
1646 | static CORE_ADDR interp_text_sect_high; | |
1647 | static CORE_ADDR interp_plt_sect_low; | |
1648 | static CORE_ADDR interp_plt_sect_high; | |
1649 | ||
1650 | int | |
fba45db2 | 1651 | in_svr4_dynsym_resolve_code (CORE_ADDR pc) |
c906108c SS |
1652 | { |
1653 | return ((pc >= interp_text_sect_low && pc < interp_text_sect_high) | |
1654 | || (pc >= interp_plt_sect_low && pc < interp_plt_sect_high) | |
1655 | || in_plt_section (pc, NULL)); | |
1656 | } | |
1657 | #endif | |
1658 | ||
1659 | /* | |
1660 | ||
c5aa993b | 1661 | LOCAL FUNCTION |
c906108c | 1662 | |
c5aa993b | 1663 | disable_break -- remove the "mapping changed" breakpoint |
c906108c | 1664 | |
c5aa993b | 1665 | SYNOPSIS |
c906108c | 1666 | |
c5aa993b | 1667 | static int disable_break () |
c906108c | 1668 | |
c5aa993b | 1669 | DESCRIPTION |
c906108c | 1670 | |
c5aa993b JM |
1671 | Removes the breakpoint that gets hit when the dynamic linker |
1672 | completes a mapping change. | |
c906108c | 1673 | |
c5aa993b | 1674 | */ |
c906108c SS |
1675 | |
1676 | #ifndef SVR4_SHARED_LIBS | |
1677 | ||
1678 | static int | |
fba45db2 | 1679 | disable_break (void) |
c906108c SS |
1680 | { |
1681 | int status = 1; | |
1682 | ||
1683 | #ifndef SVR4_SHARED_LIBS | |
1684 | ||
1685 | int in_debugger = 0; | |
c5aa993b | 1686 | |
c906108c SS |
1687 | /* Read the debugger structure from the inferior to retrieve the |
1688 | address of the breakpoint and the original contents of the | |
1689 | breakpoint address. Remove the breakpoint by writing the original | |
1690 | contents back. */ | |
1691 | ||
1692 | read_memory (debug_addr, (char *) &debug_copy, sizeof (debug_copy)); | |
1693 | ||
1694 | /* Set `in_debugger' to zero now. */ | |
1695 | ||
1696 | write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger)); | |
1697 | ||
07cd4b97 | 1698 | breakpoint_addr = SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_bp_addr); |
c906108c SS |
1699 | write_memory (breakpoint_addr, (char *) &debug_copy.ldd_bp_inst, |
1700 | sizeof (debug_copy.ldd_bp_inst)); | |
1701 | ||
c5aa993b | 1702 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
1703 | |
1704 | /* Note that breakpoint address and original contents are in our address | |
1705 | space, so we just need to write the original contents back. */ | |
1706 | ||
1707 | if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0) | |
1708 | { | |
1709 | status = 0; | |
1710 | } | |
1711 | ||
c5aa993b | 1712 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
1713 | |
1714 | /* For the SVR4 version, we always know the breakpoint address. For the | |
1715 | SunOS version we don't know it until the above code is executed. | |
1716 | Grumble if we are stopped anywhere besides the breakpoint address. */ | |
1717 | ||
1718 | if (stop_pc != breakpoint_addr) | |
1719 | { | |
1720 | warning ("stopped at unknown breakpoint while handling shared libraries"); | |
1721 | } | |
1722 | ||
1723 | return (status); | |
1724 | } | |
1725 | ||
c5aa993b | 1726 | #endif /* #ifdef SVR4_SHARED_LIBS */ |
c906108c SS |
1727 | |
1728 | /* | |
1729 | ||
c5aa993b JM |
1730 | LOCAL FUNCTION |
1731 | ||
1732 | enable_break -- arrange for dynamic linker to hit breakpoint | |
1733 | ||
1734 | SYNOPSIS | |
1735 | ||
1736 | int enable_break (void) | |
1737 | ||
1738 | DESCRIPTION | |
1739 | ||
1740 | Both the SunOS and the SVR4 dynamic linkers have, as part of their | |
1741 | debugger interface, support for arranging for the inferior to hit | |
1742 | a breakpoint after mapping in the shared libraries. This function | |
1743 | enables that breakpoint. | |
1744 | ||
1745 | For SunOS, there is a special flag location (in_debugger) which we | |
1746 | set to 1. When the dynamic linker sees this flag set, it will set | |
1747 | a breakpoint at a location known only to itself, after saving the | |
1748 | original contents of that place and the breakpoint address itself, | |
1749 | in it's own internal structures. When we resume the inferior, it | |
1750 | will eventually take a SIGTRAP when it runs into the breakpoint. | |
1751 | We handle this (in a different place) by restoring the contents of | |
1752 | the breakpointed location (which is only known after it stops), | |
1753 | chasing around to locate the shared libraries that have been | |
1754 | loaded, then resuming. | |
1755 | ||
1756 | For SVR4, the debugger interface structure contains a member (r_brk) | |
1757 | which is statically initialized at the time the shared library is | |
1758 | built, to the offset of a function (_r_debug_state) which is guaran- | |
1759 | teed to be called once before mapping in a library, and again when | |
1760 | the mapping is complete. At the time we are examining this member, | |
1761 | it contains only the unrelocated offset of the function, so we have | |
1762 | to do our own relocation. Later, when the dynamic linker actually | |
1763 | runs, it relocates r_brk to be the actual address of _r_debug_state(). | |
1764 | ||
1765 | The debugger interface structure also contains an enumeration which | |
1766 | is set to either RT_ADD or RT_DELETE prior to changing the mapping, | |
1767 | depending upon whether or not the library is being mapped or unmapped, | |
1768 | and then set to RT_CONSISTENT after the library is mapped/unmapped. | |
1769 | */ | |
c906108c SS |
1770 | |
1771 | static int | |
fba45db2 | 1772 | enable_break (void) |
c906108c SS |
1773 | { |
1774 | int success = 0; | |
1775 | ||
1776 | #ifndef SVR4_SHARED_LIBS | |
1777 | ||
1778 | int j; | |
1779 | int in_debugger; | |
1780 | ||
1781 | /* Get link_dynamic structure */ | |
1782 | ||
1783 | j = target_read_memory (debug_base, (char *) &dynamic_copy, | |
1784 | sizeof (dynamic_copy)); | |
1785 | if (j) | |
1786 | { | |
1787 | /* unreadable */ | |
1788 | return (0); | |
1789 | } | |
1790 | ||
1791 | /* Calc address of debugger interface structure */ | |
1792 | ||
07cd4b97 | 1793 | debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd); |
c906108c SS |
1794 | |
1795 | /* Calc address of `in_debugger' member of debugger interface structure */ | |
1796 | ||
1797 | flag_addr = debug_addr + (CORE_ADDR) ((char *) &debug_copy.ldd_in_debugger - | |
1798 | (char *) &debug_copy); | |
1799 | ||
1800 | /* Write a value of 1 to this member. */ | |
1801 | ||
1802 | in_debugger = 1; | |
1803 | write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger)); | |
1804 | success = 1; | |
1805 | ||
c5aa993b | 1806 | #else /* SVR4_SHARED_LIBS */ |
c906108c SS |
1807 | |
1808 | #ifdef BKPT_AT_SYMBOL | |
1809 | ||
1810 | struct minimal_symbol *msymbol; | |
1811 | char **bkpt_namep; | |
1812 | asection *interp_sect; | |
1813 | ||
1814 | /* First, remove all the solib event breakpoints. Their addresses | |
1815 | may have changed since the last time we ran the program. */ | |
1816 | remove_solib_event_breakpoints (); | |
1817 | ||
1818 | #ifdef SVR4_SHARED_LIBS | |
1819 | interp_text_sect_low = interp_text_sect_high = 0; | |
1820 | interp_plt_sect_low = interp_plt_sect_high = 0; | |
1821 | ||
1822 | /* Find the .interp section; if not found, warn the user and drop | |
1823 | into the old breakpoint at symbol code. */ | |
1824 | interp_sect = bfd_get_section_by_name (exec_bfd, ".interp"); | |
1825 | if (interp_sect) | |
1826 | { | |
1827 | unsigned int interp_sect_size; | |
1828 | char *buf; | |
1829 | CORE_ADDR load_addr; | |
1830 | bfd *tmp_bfd; | |
1831 | CORE_ADDR sym_addr = 0; | |
1832 | ||
1833 | /* Read the contents of the .interp section into a local buffer; | |
c5aa993b | 1834 | the contents specify the dynamic linker this program uses. */ |
c906108c SS |
1835 | interp_sect_size = bfd_section_size (exec_bfd, interp_sect); |
1836 | buf = alloca (interp_sect_size); | |
1837 | bfd_get_section_contents (exec_bfd, interp_sect, | |
1838 | buf, 0, interp_sect_size); | |
1839 | ||
1840 | /* Now we need to figure out where the dynamic linker was | |
c5aa993b JM |
1841 | loaded so that we can load its symbols and place a breakpoint |
1842 | in the dynamic linker itself. | |
c906108c | 1843 | |
c5aa993b JM |
1844 | This address is stored on the stack. However, I've been unable |
1845 | to find any magic formula to find it for Solaris (appears to | |
1846 | be trivial on GNU/Linux). Therefore, we have to try an alternate | |
1847 | mechanism to find the dynamic linker's base address. */ | |
c906108c SS |
1848 | tmp_bfd = bfd_openr (buf, gnutarget); |
1849 | if (tmp_bfd == NULL) | |
1850 | goto bkpt_at_symbol; | |
1851 | ||
1852 | /* Make sure the dynamic linker's really a useful object. */ | |
1853 | if (!bfd_check_format (tmp_bfd, bfd_object)) | |
1854 | { | |
1855 | warning ("Unable to grok dynamic linker %s as an object file", buf); | |
1856 | bfd_close (tmp_bfd); | |
1857 | goto bkpt_at_symbol; | |
1858 | } | |
1859 | ||
1860 | /* We find the dynamic linker's base address by examining the | |
c5aa993b JM |
1861 | current pc (which point at the entry point for the dynamic |
1862 | linker) and subtracting the offset of the entry point. */ | |
c906108c SS |
1863 | load_addr = read_pc () - tmp_bfd->start_address; |
1864 | ||
1865 | /* Record the relocated start and end address of the dynamic linker | |
c5aa993b | 1866 | text and plt section for in_svr4_dynsym_resolve_code. */ |
c906108c SS |
1867 | interp_sect = bfd_get_section_by_name (tmp_bfd, ".text"); |
1868 | if (interp_sect) | |
1869 | { | |
1870 | interp_text_sect_low = | |
1871 | bfd_section_vma (tmp_bfd, interp_sect) + load_addr; | |
1872 | interp_text_sect_high = | |
1873 | interp_text_sect_low + bfd_section_size (tmp_bfd, interp_sect); | |
1874 | } | |
1875 | interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt"); | |
1876 | if (interp_sect) | |
1877 | { | |
1878 | interp_plt_sect_low = | |
1879 | bfd_section_vma (tmp_bfd, interp_sect) + load_addr; | |
1880 | interp_plt_sect_high = | |
1881 | interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect); | |
1882 | } | |
1883 | ||
1884 | /* Now try to set a breakpoint in the dynamic linker. */ | |
1885 | for (bkpt_namep = solib_break_names; *bkpt_namep != NULL; bkpt_namep++) | |
1886 | { | |
1887 | sym_addr = bfd_lookup_symbol (tmp_bfd, *bkpt_namep); | |
1888 | if (sym_addr != 0) | |
1889 | break; | |
1890 | } | |
1891 | ||
1892 | /* We're done with the temporary bfd. */ | |
1893 | bfd_close (tmp_bfd); | |
1894 | ||
1895 | if (sym_addr != 0) | |
1896 | { | |
1897 | create_solib_event_breakpoint (load_addr + sym_addr); | |
1898 | return 1; | |
1899 | } | |
1900 | ||
1901 | /* For whatever reason we couldn't set a breakpoint in the dynamic | |
c5aa993b JM |
1902 | linker. Warn and drop into the old code. */ |
1903 | bkpt_at_symbol: | |
c906108c SS |
1904 | warning ("Unable to find dynamic linker breakpoint function.\nGDB will be unable to debug shared library initializers\nand track explicitly loaded dynamic code."); |
1905 | } | |
1906 | #endif | |
1907 | ||
1908 | /* Scan through the list of symbols, trying to look up the symbol and | |
1909 | set a breakpoint there. Terminate loop when we/if we succeed. */ | |
1910 | ||
1911 | breakpoint_addr = 0; | |
1912 | for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++) | |
1913 | { | |
1914 | msymbol = lookup_minimal_symbol (*bkpt_namep, NULL, symfile_objfile); | |
1915 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) | |
1916 | { | |
1917 | create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol)); | |
1918 | return 1; | |
1919 | } | |
1920 | } | |
1921 | ||
1922 | /* Nothing good happened. */ | |
1923 | success = 0; | |
1924 | ||
c5aa993b | 1925 | #endif /* BKPT_AT_SYMBOL */ |
c906108c | 1926 | |
c5aa993b | 1927 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
1928 | |
1929 | return (success); | |
1930 | } | |
c5aa993b | 1931 | |
c906108c | 1932 | /* |
c5aa993b JM |
1933 | |
1934 | GLOBAL FUNCTION | |
1935 | ||
1936 | solib_create_inferior_hook -- shared library startup support | |
1937 | ||
1938 | SYNOPSIS | |
1939 | ||
1940 | void solib_create_inferior_hook() | |
1941 | ||
1942 | DESCRIPTION | |
1943 | ||
1944 | When gdb starts up the inferior, it nurses it along (through the | |
1945 | shell) until it is ready to execute it's first instruction. At this | |
1946 | point, this function gets called via expansion of the macro | |
1947 | SOLIB_CREATE_INFERIOR_HOOK. | |
1948 | ||
1949 | For SunOS executables, this first instruction is typically the | |
1950 | one at "_start", or a similar text label, regardless of whether | |
1951 | the executable is statically or dynamically linked. The runtime | |
1952 | startup code takes care of dynamically linking in any shared | |
1953 | libraries, once gdb allows the inferior to continue. | |
1954 | ||
1955 | For SVR4 executables, this first instruction is either the first | |
1956 | instruction in the dynamic linker (for dynamically linked | |
1957 | executables) or the instruction at "start" for statically linked | |
1958 | executables. For dynamically linked executables, the system | |
1959 | first exec's /lib/libc.so.N, which contains the dynamic linker, | |
1960 | and starts it running. The dynamic linker maps in any needed | |
1961 | shared libraries, maps in the actual user executable, and then | |
1962 | jumps to "start" in the user executable. | |
1963 | ||
1964 | For both SunOS shared libraries, and SVR4 shared libraries, we | |
1965 | can arrange to cooperate with the dynamic linker to discover the | |
1966 | names of shared libraries that are dynamically linked, and the | |
1967 | base addresses to which they are linked. | |
1968 | ||
1969 | This function is responsible for discovering those names and | |
1970 | addresses, and saving sufficient information about them to allow | |
1971 | their symbols to be read at a later time. | |
1972 | ||
1973 | FIXME | |
1974 | ||
1975 | Between enable_break() and disable_break(), this code does not | |
1976 | properly handle hitting breakpoints which the user might have | |
1977 | set in the startup code or in the dynamic linker itself. Proper | |
1978 | handling will probably have to wait until the implementation is | |
1979 | changed to use the "breakpoint handler function" method. | |
1980 | ||
1981 | Also, what if child has exit()ed? Must exit loop somehow. | |
1982 | */ | |
1983 | ||
1984 | void | |
fba45db2 | 1985 | solib_create_inferior_hook (void) |
c906108c SS |
1986 | { |
1987 | /* If we are using the BKPT_AT_SYMBOL code, then we don't need the base | |
1988 | yet. In fact, in the case of a SunOS4 executable being run on | |
07cd4b97 | 1989 | Solaris, we can't get it yet. current_sos will get it when it needs |
c906108c SS |
1990 | it. */ |
1991 | #if !(defined (SVR4_SHARED_LIBS) && defined (BKPT_AT_SYMBOL)) | |
1992 | if ((debug_base = locate_base ()) == 0) | |
1993 | { | |
1994 | /* Can't find the symbol or the executable is statically linked. */ | |
1995 | return; | |
1996 | } | |
1997 | #endif | |
1998 | ||
1999 | if (!enable_break ()) | |
2000 | { | |
2001 | warning ("shared library handler failed to enable breakpoint"); | |
2002 | return; | |
2003 | } | |
2004 | ||
2005 | #if !defined(SVR4_SHARED_LIBS) || defined(_SCO_DS) | |
2006 | /* SCO and SunOS need the loop below, other systems should be using the | |
2007 | special shared library breakpoints and the shared library breakpoint | |
2008 | service routine. | |
2009 | ||
2010 | Now run the target. It will eventually hit the breakpoint, at | |
2011 | which point all of the libraries will have been mapped in and we | |
2012 | can go groveling around in the dynamic linker structures to find | |
2013 | out what we need to know about them. */ | |
2014 | ||
2015 | clear_proceed_status (); | |
2016 | stop_soon_quietly = 1; | |
2017 | stop_signal = TARGET_SIGNAL_0; | |
2018 | do | |
2019 | { | |
2020 | target_resume (-1, 0, stop_signal); | |
2021 | wait_for_inferior (); | |
2022 | } | |
2023 | while (stop_signal != TARGET_SIGNAL_TRAP); | |
2024 | stop_soon_quietly = 0; | |
2025 | ||
2026 | #if !defined(_SCO_DS) | |
2027 | /* We are now either at the "mapping complete" breakpoint (or somewhere | |
2028 | else, a condition we aren't prepared to deal with anyway), so adjust | |
2029 | the PC as necessary after a breakpoint, disable the breakpoint, and | |
2030 | add any shared libraries that were mapped in. */ | |
2031 | ||
2032 | if (DECR_PC_AFTER_BREAK) | |
2033 | { | |
2034 | stop_pc -= DECR_PC_AFTER_BREAK; | |
2035 | write_register (PC_REGNUM, stop_pc); | |
2036 | } | |
2037 | ||
2038 | if (!disable_break ()) | |
2039 | { | |
2040 | warning ("shared library handler failed to disable breakpoint"); | |
2041 | } | |
2042 | ||
2043 | if (auto_solib_add) | |
2044 | solib_add ((char *) 0, 0, (struct target_ops *) 0); | |
2045 | #endif /* ! _SCO_DS */ | |
2046 | #endif | |
2047 | } | |
2048 | ||
2049 | /* | |
2050 | ||
c5aa993b | 2051 | LOCAL FUNCTION |
c906108c | 2052 | |
c5aa993b | 2053 | special_symbol_handling -- additional shared library symbol handling |
c906108c | 2054 | |
c5aa993b | 2055 | SYNOPSIS |
c906108c | 2056 | |
07cd4b97 | 2057 | void special_symbol_handling () |
c906108c | 2058 | |
c5aa993b | 2059 | DESCRIPTION |
c906108c | 2060 | |
c5aa993b JM |
2061 | Once the symbols from a shared object have been loaded in the usual |
2062 | way, we are called to do any system specific symbol handling that | |
2063 | is needed. | |
c906108c | 2064 | |
c5aa993b JM |
2065 | For SunOS4, this consists of grunging around in the dynamic |
2066 | linkers structures to find symbol definitions for "common" symbols | |
2067 | and adding them to the minimal symbol table for the runtime common | |
2068 | objfile. | |
c906108c | 2069 | |
c5aa993b | 2070 | */ |
c906108c SS |
2071 | |
2072 | static void | |
fba45db2 | 2073 | special_symbol_handling (void) |
c906108c SS |
2074 | { |
2075 | #ifndef SVR4_SHARED_LIBS | |
2076 | int j; | |
2077 | ||
2078 | if (debug_addr == 0) | |
2079 | { | |
2080 | /* Get link_dynamic structure */ | |
2081 | ||
2082 | j = target_read_memory (debug_base, (char *) &dynamic_copy, | |
2083 | sizeof (dynamic_copy)); | |
2084 | if (j) | |
2085 | { | |
2086 | /* unreadable */ | |
2087 | return; | |
2088 | } | |
2089 | ||
2090 | /* Calc address of debugger interface structure */ | |
2091 | /* FIXME, this needs work for cross-debugging of core files | |
c5aa993b | 2092 | (byteorder, size, alignment, etc). */ |
c906108c | 2093 | |
07cd4b97 | 2094 | debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd); |
c906108c SS |
2095 | } |
2096 | ||
2097 | /* Read the debugger structure from the inferior, just to make sure | |
2098 | we have a current copy. */ | |
2099 | ||
2100 | j = target_read_memory (debug_addr, (char *) &debug_copy, | |
2101 | sizeof (debug_copy)); | |
2102 | if (j) | |
c5aa993b | 2103 | return; /* unreadable */ |
c906108c SS |
2104 | |
2105 | /* Get common symbol definitions for the loaded object. */ | |
2106 | ||
2107 | if (debug_copy.ldd_cp) | |
2108 | { | |
07cd4b97 | 2109 | solib_add_common_symbols (SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_cp)); |
c906108c SS |
2110 | } |
2111 | ||
c5aa993b | 2112 | #endif /* !SVR4_SHARED_LIBS */ |
c906108c SS |
2113 | } |
2114 | ||
2115 | ||
2116 | /* | |
2117 | ||
c5aa993b | 2118 | LOCAL FUNCTION |
c906108c | 2119 | |
c5aa993b | 2120 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 2121 | |
c5aa993b | 2122 | SYNOPSIS |
c906108c | 2123 | |
c5aa993b | 2124 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 2125 | |
c5aa993b | 2126 | DESCRIPTION |
c906108c | 2127 | |
c5aa993b | 2128 | */ |
c906108c SS |
2129 | |
2130 | static void | |
fba45db2 | 2131 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
2132 | { |
2133 | dont_repeat (); | |
2134 | solib_add (args, from_tty, (struct target_ops *) 0); | |
2135 | } | |
2136 | ||
2137 | #endif /* HAVE_LINK_H */ | |
2138 | ||
2139 | void | |
fba45db2 | 2140 | _initialize_solib (void) |
c906108c SS |
2141 | { |
2142 | #ifdef HAVE_LINK_H | |
2143 | ||
2144 | add_com ("sharedlibrary", class_files, sharedlibrary_command, | |
2145 | "Load shared object library symbols for files matching REGEXP."); | |
c5aa993b | 2146 | add_info ("sharedlibrary", info_sharedlibrary_command, |
c906108c SS |
2147 | "Status of loaded shared object libraries."); |
2148 | ||
2149 | add_show_from_set | |
2150 | (add_set_cmd ("auto-solib-add", class_support, var_zinteger, | |
2151 | (char *) &auto_solib_add, | |
2152 | "Set autoloading of shared library symbols.\n\ | |
2153 | If nonzero, symbols from all shared object libraries will be loaded\n\ | |
2154 | automatically when the inferior begins execution or when the dynamic linker\n\ | |
2155 | informs gdb that a new library has been loaded. Otherwise, symbols\n\ | |
2156 | must be loaded manually, using `sharedlibrary'.", | |
2157 | &setlist), | |
2158 | &showlist); | |
2159 | ||
2160 | add_show_from_set | |
2161 | (add_set_cmd ("solib-absolute-prefix", class_support, var_filename, | |
2162 | (char *) &solib_absolute_prefix, | |
2163 | "Set prefix for loading absolute shared library symbol files.\n\ | |
2164 | For other (relative) files, you can add values using `set solib-search-path'.", | |
2165 | &setlist), | |
2166 | &showlist); | |
2167 | add_show_from_set | |
2168 | (add_set_cmd ("solib-search-path", class_support, var_string, | |
2169 | (char *) &solib_search_path, | |
2170 | "Set the search path for loading non-absolute shared library symbol files.\n\ | |
2171 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.", | |
2172 | &setlist), | |
2173 | &showlist); | |
2174 | ||
2175 | #endif /* HAVE_LINK_H */ | |
2176 | } |