Commit | Line | Data |
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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
3666a048 | 3 | Copyright (C) 1990-2021 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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 19 | |
c906108c SS |
20 | #include "defs.h" |
21 | ||
c906108c | 22 | #include <sys/types.h> |
c906108c | 23 | #include <fcntl.h> |
c906108c SS |
24 | #include "symtab.h" |
25 | #include "bfd.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "gdbcore.h" | |
29 | #include "command.h" | |
30 | #include "target.h" | |
31 | #include "frame.h" | |
88987551 | 32 | #include "gdb_regex.h" |
c906108c | 33 | #include "inferior.h" |
268a13a5 | 34 | #include "gdbsupport/environ.h" |
c906108c SS |
35 | #include "language.h" |
36 | #include "gdbcmd.h" | |
fa58ee11 | 37 | #include "completer.h" |
fe4e3eb8 | 38 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 39 | #include "exec.h" |
13437d4b | 40 | #include "solist.h" |
76727919 | 41 | #include "observable.h" |
e0eac551 | 42 | #include "readline/tilde.h" |
f1838a98 | 43 | #include "remote.h" |
2c0b251b | 44 | #include "solib.h" |
55333a84 | 45 | #include "interps.h" |
ab38a727 | 46 | #include "filesystem.h" |
cbb099e8 | 47 | #include "gdb_bfd.h" |
268a13a5 | 48 | #include "gdbsupport/filestuff.h" |
b46a8d7c | 49 | #include "source.h" |
e43b10e1 | 50 | #include "cli/cli-style.h" |
c906108c | 51 | |
66aba65d MK |
52 | /* Architecture-specific operations. */ |
53 | ||
54 | /* Per-architecture data key. */ | |
55 | static struct gdbarch_data *solib_data; | |
56 | ||
57 | static void * | |
58 | solib_init (struct obstack *obstack) | |
59 | { | |
60 | struct target_so_ops **ops; | |
61 | ||
62 | ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *); | |
63 | *ops = current_target_so_ops; | |
64 | return ops; | |
65 | } | |
66 | ||
3641da11 | 67 | static const struct target_so_ops * |
66aba65d MK |
68 | solib_ops (struct gdbarch *gdbarch) |
69 | { | |
19ba03f4 SM |
70 | const struct target_so_ops **ops |
71 | = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data); | |
433759f7 | 72 | |
66aba65d MK |
73 | return *ops; |
74 | } | |
7d522c90 DJ |
75 | |
76 | /* Set the solib operations for GDBARCH to NEW_OPS. */ | |
77 | ||
78 | void | |
3641da11 | 79 | set_solib_ops (struct gdbarch *gdbarch, const struct target_so_ops *new_ops) |
7d522c90 | 80 | { |
19ba03f4 SM |
81 | const struct target_so_ops **ops |
82 | = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data); | |
433759f7 | 83 | |
7d522c90 DJ |
84 | *ops = new_ops; |
85 | } | |
66aba65d MK |
86 | \f |
87 | ||
13437d4b | 88 | /* external data declarations */ |
c906108c | 89 | |
7d522c90 DJ |
90 | /* FIXME: gdbarch needs to control this variable, or else every |
91 | configuration needs to call set_solib_ops. */ | |
13437d4b | 92 | struct target_so_ops *current_target_so_ops; |
23e04971 | 93 | |
c906108c SS |
94 | /* Local function prototypes */ |
95 | ||
c906108c SS |
96 | /* If non-empty, this is a search path for loading non-absolute shared library |
97 | symbol files. This takes precedence over the environment variables PATH | |
98 | and LD_LIBRARY_PATH. */ | |
99 | static char *solib_search_path = NULL; | |
920d2a44 AC |
100 | static void |
101 | show_solib_search_path (struct ui_file *file, int from_tty, | |
102 | struct cmd_list_element *c, const char *value) | |
103 | { | |
3e43a32a MS |
104 | fprintf_filtered (file, _("The search path for loading non-absolute " |
105 | "shared library symbol files is %s.\n"), | |
920d2a44 AC |
106 | value); |
107 | } | |
c906108c | 108 | |
ab38a727 PA |
109 | /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */ |
110 | #if (HAVE_DOS_BASED_FILE_SYSTEM) | |
111 | # define DOS_BASED_FILE_SYSTEM 1 | |
112 | #else | |
113 | # define DOS_BASED_FILE_SYSTEM 0 | |
114 | #endif | |
115 | ||
797bc1cb TT |
116 | /* Return the full pathname of a binary file (the main executable or a |
117 | shared library file), or NULL if not found. If FD is non-NULL, *FD | |
118 | is set to either -1 or an open file handle for the binary file. | |
e4f7b8c8 | 119 | |
f822c95b | 120 | Global variable GDB_SYSROOT is used as a prefix directory |
af1900b0 | 121 | to search for binary files if they have an absolute path. |
b57fbfba GB |
122 | If GDB_SYSROOT starts with "target:" and target filesystem |
123 | is the local filesystem then the "target:" prefix will be | |
124 | stripped before the search starts. This ensures that the | |
125 | same search algorithm is used for local files regardless of | |
126 | whether a "target:" prefix was used. | |
e4f7b8c8 MS |
127 | |
128 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
129 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
b57fbfba | 130 | shared libraries if not found in either the sysroot (if set) or |
af1900b0 GB |
131 | the local filesystem. SOLIB_SEARCH_PATH is not used when searching |
132 | for the main executable. | |
e4f7b8c8 | 133 | |
c8c18e65 | 134 | Search algorithm: |
b57fbfba GB |
135 | * If a sysroot is set and path is absolute: |
136 | * Search for sysroot/path. | |
c8c18e65 KW |
137 | * else |
138 | * Look for it literally (unmodified). | |
af1900b0 GB |
139 | * If IS_SOLIB is non-zero: |
140 | * Look in SOLIB_SEARCH_PATH. | |
141 | * If available, use target defined search function. | |
b57fbfba | 142 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 | 143 | * Look in inferior's $PATH. |
af1900b0 GB |
144 | * If IS_SOLIB is non-zero: |
145 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 146 | * |
85102364 | 147 | * The last check avoids doing this search when targeting remote |
b57fbfba | 148 | * machines since a sysroot will almost always be set. |
7f86f058 | 149 | */ |
e4f7b8c8 | 150 | |
797bc1cb | 151 | static gdb::unique_xmalloc_ptr<char> |
5b89c67a | 152 | solib_find_1 (const char *in_pathname, int *fd, bool is_solib) |
e4f7b8c8 | 153 | { |
3641da11 | 154 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
e4f7b8c8 | 155 | int found_file = -1; |
e0cc99a6 | 156 | gdb::unique_xmalloc_ptr<char> temp_pathname; |
ab38a727 | 157 | const char *fskind = effective_target_file_system_kind (); |
9a897d43 | 158 | const char *sysroot = gdb_sysroot; |
f8773be1 | 159 | int prefix_len, orig_prefix_len; |
08105857 | 160 | |
a3be80c3 GB |
161 | /* If the absolute prefix starts with "target:" but the filesystem |
162 | accessed by the target_fileio_* methods is the local filesystem | |
163 | then we strip the "target:" prefix now and work with the local | |
164 | filesystem. This ensures that the same search algorithm is used | |
165 | for all local files regardless of whether a "target:" prefix was | |
166 | used. */ | |
167 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
168 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
169 | ||
f8773be1 GB |
170 | /* Strip any trailing slashes from the absolute prefix. */ |
171 | prefix_len = orig_prefix_len = strlen (sysroot); | |
f1d10cfb | 172 | |
f8773be1 GB |
173 | while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
174 | prefix_len--; | |
f1d10cfb | 175 | |
9a897d43 | 176 | std::string sysroot_holder; |
f8773be1 GB |
177 | if (prefix_len == 0) |
178 | sysroot = NULL; | |
179 | else if (prefix_len != orig_prefix_len) | |
180 | { | |
9a897d43 TT |
181 | sysroot_holder = std::string (sysroot, prefix_len); |
182 | sysroot = sysroot_holder.c_str (); | |
ab38a727 PA |
183 | } |
184 | ||
185 | /* If we're on a non-DOS-based system, backslashes won't be | |
186 | understood as directory separator, so, convert them to forward | |
187 | slashes, iff we're supposed to handle DOS-based file system | |
188 | semantics for target paths. */ | |
189 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
190 | { | |
191 | char *p; | |
192 | ||
193 | /* Avoid clobbering our input. */ | |
224c3ddb | 194 | p = (char *) alloca (strlen (in_pathname) + 1); |
ab38a727 PA |
195 | strcpy (p, in_pathname); |
196 | in_pathname = p; | |
197 | ||
198 | for (; *p; p++) | |
199 | { | |
200 | if (*p == '\\') | |
201 | *p = '/'; | |
202 | } | |
203 | } | |
204 | ||
205 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
206 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
207 | IN_PATHNAME is a target path. For example, if we're supposed to | |
208 | be handling DOS-like semantics we want to consider a | |
209 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
210 | With such a path, before giving up on the sysroot, we'll try: | |
211 | ||
212 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
213 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
214 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
215 | */ | |
216 | ||
b57fbfba | 217 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
e0cc99a6 | 218 | temp_pathname.reset (xstrdup (in_pathname)); |
ab38a727 PA |
219 | else |
220 | { | |
5b89c67a | 221 | bool need_dir_separator; |
ab38a727 | 222 | |
3736004f PA |
223 | /* Concatenate the sysroot and the target reported filename. We |
224 | may need to glue them with a directory separator. Cases to | |
225 | consider: | |
226 | ||
dda83cd7 SM |
227 | | sysroot | separator | in_pathname | |
228 | |-----------------+-----------+----------------| | |
229 | | /some/dir | / | c:/foo/bar.dll | | |
230 | | /some/dir | | /foo/bar.dll | | |
231 | | target: | | c:/foo/bar.dll | | |
232 | | target: | | /foo/bar.dll | | |
233 | | target:some/dir | / | c:/foo/bar.dll | | |
234 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
235 | |
236 | IOW, we don't need to add a separator if IN_PATHNAME already | |
6471e7d2 | 237 | has one, or when the sysroot is exactly "target:". |
3736004f PA |
238 | There's no need to check for drive spec explicitly, as we only |
239 | get here if IN_PATHNAME is considered an absolute path. */ | |
240 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 241 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 242 | |
f1d10cfb | 243 | /* Cat the prefixed pathname together. */ |
e0cc99a6 TT |
244 | temp_pathname.reset (concat (sysroot, |
245 | need_dir_separator ? SLASH_STRING : "", | |
246 | in_pathname, (char *) NULL)); | |
e4f7b8c8 MS |
247 | } |
248 | ||
2938e6cf | 249 | /* Handle files to be accessed via the target. */ |
e0cc99a6 | 250 | if (is_target_filename (temp_pathname.get ())) |
f1838a98 | 251 | { |
998d2a3e GB |
252 | if (fd != NULL) |
253 | *fd = -1; | |
e0cc99a6 | 254 | return temp_pathname; |
f1838a98 UW |
255 | } |
256 | ||
f1d10cfb | 257 | /* Now see if we can open it. */ |
e0cc99a6 | 258 | found_file = gdb_open_cloexec (temp_pathname.get (), O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
259 | |
260 | /* If the search in gdb_sysroot failed, and the path name has a | |
261 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
262 | and retrying in the sysroot: | |
263 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 264 | |
ab38a727 | 265 | if (found_file < 0 |
b57fbfba | 266 | && sysroot != NULL |
ab38a727 PA |
267 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
268 | { | |
5b89c67a | 269 | bool need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); |
e0cc99a6 | 270 | char drive[2] = { in_pathname[0], '\0' }; |
ab38a727 | 271 | |
e0cc99a6 TT |
272 | temp_pathname.reset (concat (sysroot, |
273 | SLASH_STRING, | |
274 | drive, | |
275 | need_dir_separator ? SLASH_STRING : "", | |
276 | in_pathname + 2, (char *) NULL)); | |
ab38a727 | 277 | |
e0cc99a6 TT |
278 | found_file = gdb_open_cloexec (temp_pathname.get (), |
279 | O_RDONLY | O_BINARY, 0); | |
ab38a727 PA |
280 | if (found_file < 0) |
281 | { | |
ab38a727 PA |
282 | /* If the search in gdb_sysroot still failed, try fully |
283 | stripping the drive spec, and trying once more in the | |
284 | sysroot before giving up. | |
285 | ||
286 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
287 | ||
e0cc99a6 TT |
288 | temp_pathname.reset (concat (sysroot, |
289 | need_dir_separator ? SLASH_STRING : "", | |
290 | in_pathname + 2, (char *) NULL)); | |
ab38a727 | 291 | |
e0cc99a6 TT |
292 | found_file = gdb_open_cloexec (temp_pathname.get (), |
293 | O_RDONLY | O_BINARY, 0); | |
ab38a727 PA |
294 | } |
295 | } | |
0997b535 | 296 | |
ab38a727 PA |
297 | /* We try to find the library in various ways. After each attempt, |
298 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
299 | found_file < 0 and temp_pathname does not point to storage that | |
300 | needs to be freed. */ | |
301 | ||
302 | if (found_file < 0) | |
e0cc99a6 | 303 | temp_pathname.reset (NULL); |
ab38a727 | 304 | |
f822c95b | 305 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
306 | absolute at this point, make it relative. (openp will try and open the |
307 | file according to its absolute path otherwise, which is not what we want.) | |
308 | Affects subsequent searches for this solib. */ | |
ab38a727 | 309 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
310 | { |
311 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
312 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
313 | in_pathname++; | |
ba5f0d88 OF |
314 | |
315 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
316 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
317 | in_pathname++; | |
ba5f0d88 | 318 | } |
ab38a727 | 319 | |
af1900b0 GB |
320 | /* If not found, and we're looking for a solib, search the |
321 | solib_search_path (if any). */ | |
322 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
323 | found_file = openp (solib_search_path, |
324 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
fbdebf46 | 325 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 326 | |
af1900b0 GB |
327 | /* If not found, and we're looking for a solib, next search the |
328 | solib_search_path (if any) for the basename only (ignoring the | |
329 | path). This is to allow reading solibs from a path that differs | |
330 | from the opened path. */ | |
331 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
332 | found_file = openp (solib_search_path, |
333 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
ab38a727 PA |
334 | target_lbasename (fskind, in_pathname), |
335 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 336 | |
af1900b0 GB |
337 | /* If not found, and we're looking for a solib, try to use target |
338 | supplied solib search method. */ | |
339 | if (is_solib && found_file < 0 && ops->find_and_open_solib) | |
637d6690 | 340 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 341 | &temp_pathname); |
2610b0bf | 342 | |
c378eb4e | 343 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 344 | if (found_file < 0 && sysroot == NULL) |
9a6c7d9c | 345 | found_file = openp (current_inferior ()->environment.get ("PATH"), |
492c0ab7 JK |
346 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
347 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 348 | |
af1900b0 GB |
349 | /* If not found, and we're looking for a solib, next search the |
350 | inferior's $LD_LIBRARY_PATH environment variable. */ | |
351 | if (is_solib && found_file < 0 && sysroot == NULL) | |
9a6c7d9c SDJ |
352 | found_file = openp (current_inferior ()->environment.get |
353 | ("LD_LIBRARY_PATH"), | |
492c0ab7 JK |
354 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
355 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 356 | |
998d2a3e GB |
357 | if (fd == NULL) |
358 | { | |
359 | if (found_file >= 0) | |
360 | close (found_file); | |
361 | } | |
362 | else | |
363 | *fd = found_file; | |
364 | ||
e0cc99a6 | 365 | return temp_pathname; |
572d275c UW |
366 | } |
367 | ||
af1900b0 | 368 | /* Return the full pathname of the main executable, or NULL if not |
797bc1cb TT |
369 | found. If FD is non-NULL, *FD is set to either -1 or an open file |
370 | handle for the main executable. */ | |
af1900b0 | 371 | |
797bc1cb | 372 | gdb::unique_xmalloc_ptr<char> |
992f1ddc | 373 | exec_file_find (const char *in_pathname, int *fd) |
af1900b0 | 374 | { |
797bc1cb | 375 | gdb::unique_xmalloc_ptr<char> result; |
ecf45d2c SL |
376 | const char *fskind = effective_target_file_system_kind (); |
377 | ||
378 | if (in_pathname == NULL) | |
379 | return NULL; | |
af1900b0 | 380 | |
ecf45d2c | 381 | if (*gdb_sysroot != '\0' && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
af1900b0 | 382 | { |
5b89c67a | 383 | result = solib_find_1 (in_pathname, fd, false); |
af1900b0 | 384 | |
ecf45d2c | 385 | if (result == NULL && fskind == file_system_kind_dos_based) |
af1900b0 GB |
386 | { |
387 | char *new_pathname; | |
388 | ||
224c3ddb | 389 | new_pathname = (char *) alloca (strlen (in_pathname) + 5); |
af1900b0 GB |
390 | strcpy (new_pathname, in_pathname); |
391 | strcat (new_pathname, ".exe"); | |
392 | ||
5b89c67a | 393 | result = solib_find_1 (new_pathname, fd, false); |
af1900b0 GB |
394 | } |
395 | } | |
ecf45d2c SL |
396 | else |
397 | { | |
398 | /* It's possible we don't have a full path, but rather just a | |
399 | filename. Some targets, such as HP-UX, don't provide the | |
400 | full path, sigh. | |
401 | ||
402 | Attempt to qualify the filename against the source path. | |
403 | (If that fails, we'll just fall back on the original | |
404 | filename. Not much more we can do...) */ | |
405 | ||
e0cc99a6 | 406 | if (!source_full_path_of (in_pathname, &result)) |
797bc1cb | 407 | result.reset (xstrdup (in_pathname)); |
ecf45d2c SL |
408 | if (fd != NULL) |
409 | *fd = -1; | |
410 | } | |
af1900b0 GB |
411 | |
412 | return result; | |
413 | } | |
414 | ||
415 | /* Return the full pathname of a shared library file, or NULL if not | |
797bc1cb TT |
416 | found. If FD is non-NULL, *FD is set to either -1 or an open file |
417 | handle for the shared library. | |
af1900b0 GB |
418 | |
419 | The search algorithm used is described in solib_find_1's comment | |
420 | above. */ | |
421 | ||
797bc1cb | 422 | gdb::unique_xmalloc_ptr<char> |
992f1ddc | 423 | solib_find (const char *in_pathname, int *fd) |
af1900b0 GB |
424 | { |
425 | const char *solib_symbols_extension | |
426 | = gdbarch_solib_symbols_extension (target_gdbarch ()); | |
427 | ||
428 | /* If solib_symbols_extension is set, replace the file's | |
429 | extension. */ | |
430 | if (solib_symbols_extension != NULL) | |
431 | { | |
992f1ddc | 432 | const char *p = in_pathname + strlen (in_pathname); |
af1900b0 GB |
433 | |
434 | while (p > in_pathname && *p != '.') | |
435 | p--; | |
436 | ||
437 | if (*p == '.') | |
438 | { | |
439 | char *new_pathname; | |
440 | ||
224c3ddb SM |
441 | new_pathname |
442 | = (char *) alloca (p - in_pathname + 1 | |
443 | + strlen (solib_symbols_extension) + 1); | |
af1900b0 GB |
444 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); |
445 | strcpy (new_pathname + (p - in_pathname) + 1, | |
446 | solib_symbols_extension); | |
447 | ||
448 | in_pathname = new_pathname; | |
449 | } | |
450 | } | |
451 | ||
5b89c67a | 452 | return solib_find_1 (in_pathname, fd, true); |
af1900b0 GB |
453 | } |
454 | ||
572d275c UW |
455 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, |
456 | it is used as file handle to open the file. Throws an error if the file | |
457 | could not be opened. Handles both local and remote file access. | |
458 | ||
797bc1cb | 459 | If unsuccessful, the FD will be closed (unless FD was -1). */ |
572d275c | 460 | |
192b62ce | 461 | gdb_bfd_ref_ptr |
797bc1cb | 462 | solib_bfd_fopen (const char *pathname, int fd) |
572d275c | 463 | { |
192b62ce | 464 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (pathname, gnutarget, fd)); |
572d275c | 465 | |
192b62ce TT |
466 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd.get ())) |
467 | bfd_set_cacheable (abfd.get (), 1); | |
f1838a98 | 468 | |
192b62ce | 469 | if (abfd == NULL) |
f1838a98 | 470 | { |
9a897d43 | 471 | /* Arrange to free PATHNAME when the error is thrown. */ |
f1838a98 | 472 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 473 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
474 | } |
475 | ||
520b0001 | 476 | return abfd; |
572d275c UW |
477 | } |
478 | ||
479 | /* Find shared library PATHNAME and open a BFD for it. */ | |
480 | ||
192b62ce | 481 | gdb_bfd_ref_ptr |
692d6f97 | 482 | solib_bfd_open (const char *pathname) |
572d275c | 483 | { |
572d275c | 484 | int found_file; |
378d2b72 | 485 | const struct bfd_arch_info *b; |
572d275c | 486 | |
572d275c | 487 | /* Search for shared library file. */ |
797bc1cb TT |
488 | gdb::unique_xmalloc_ptr<char> found_pathname |
489 | = solib_find (pathname, &found_file); | |
572d275c | 490 | if (found_pathname == NULL) |
048d532d PA |
491 | { |
492 | /* Return failure if the file could not be found, so that we can | |
493 | accumulate messages about missing libraries. */ | |
494 | if (errno == ENOENT) | |
495 | return NULL; | |
496 | ||
497 | perror_with_name (pathname); | |
498 | } | |
572d275c UW |
499 | |
500 | /* Open bfd for shared library. */ | |
797bc1cb | 501 | gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname.get (), found_file)); |
572d275c UW |
502 | |
503 | /* Check bfd format. */ | |
192b62ce TT |
504 | if (!bfd_check_format (abfd.get (), bfd_object)) |
505 | error (_("`%s': not in executable format: %s"), | |
00f93c44 | 506 | bfd_get_filename (abfd.get ()), bfd_errmsg (bfd_get_error ())); |
f1838a98 | 507 | |
378d2b72 | 508 | /* Check bfd arch. */ |
f5656ead | 509 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
192b62ce | 510 | if (!b->compatible (b, bfd_get_arch_info (abfd.get ()))) |
378d2b72 | 511 | warning (_("`%s': Shared library architecture %s is not compatible " |
00f93c44 AM |
512 | "with target architecture %s."), bfd_get_filename (abfd.get ()), |
513 | bfd_get_arch_info (abfd.get ())->printable_name, | |
192b62ce | 514 | b->printable_name); |
378d2b72 | 515 | |
f1838a98 | 516 | return abfd; |
e4f7b8c8 MS |
517 | } |
518 | ||
7f86f058 PA |
519 | /* Given a pointer to one of the shared objects in our list of mapped |
520 | objects, use the recorded name to open a bfd descriptor for the | |
521 | object, build a section table, relocate all the section addresses | |
522 | by the base address at which the shared object was mapped, and then | |
523 | add the sections to the target's section table. | |
e4f7b8c8 | 524 | |
7f86f058 PA |
525 | FIXME: In most (all?) cases the shared object file name recorded in |
526 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
527 | cases where it isn't, do we really mimic the systems search |
528 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 529 | expansion stuff?). */ |
c906108c SS |
530 | |
531 | static int | |
048d532d | 532 | solib_map_sections (struct so_list *so) |
c906108c | 533 | { |
3641da11 | 534 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 535 | |
ee0c3293 TT |
536 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (so->so_name)); |
537 | gdb_bfd_ref_ptr abfd (ops->bfd_open (filename.get ())); | |
e4f7b8c8 | 538 | |
048d532d PA |
539 | if (abfd == NULL) |
540 | return 0; | |
541 | ||
13437d4b | 542 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
192b62ce | 543 | so->abfd = abfd.release (); |
23e04971 | 544 | |
b030cf11 JB |
545 | /* Copy the full path name into so_name, allowing symbol_file_add |
546 | to find it later. This also affects the =library-loaded GDB/MI | |
547 | event, and in particular the part of that notification providing | |
548 | the library's host-side path. If we let the target dictate | |
549 | that objfile's path, and the target is different from the host, | |
550 | GDB/MI will not provide the correct host-side path. */ | |
192b62ce | 551 | if (strlen (bfd_get_filename (so->abfd)) >= SO_NAME_MAX_PATH_SIZE) |
b030cf11 | 552 | error (_("Shared library file name is too long.")); |
192b62ce | 553 | strcpy (so->so_name, bfd_get_filename (so->abfd)); |
b030cf11 | 554 | |
bb2a6777 TT |
555 | if (so->sections == nullptr) |
556 | so->sections = new target_section_table; | |
2d128614 | 557 | *so->sections = build_section_table (so->abfd); |
104c1213 | 558 | |
d7a78e5c | 559 | for (target_section &p : *so->sections) |
104c1213 | 560 | { |
13437d4b | 561 | /* Relocate the section binding addresses as recorded in the shared |
dda83cd7 SM |
562 | object's file by the base address to which the object was actually |
563 | mapped. */ | |
bb2a6777 | 564 | ops->relocate_section_addresses (so, &p); |
cfa9d6d9 DJ |
565 | |
566 | /* If the target didn't provide information about the address | |
567 | range of the shared object, assume we want the location of | |
568 | the .text section. */ | |
569 | if (so->addr_low == 0 && so->addr_high == 0 | |
bb2a6777 | 570 | && strcmp (p.the_bfd_section->name, ".text") == 0) |
13437d4b | 571 | { |
bb2a6777 TT |
572 | so->addr_low = p.addr; |
573 | so->addr_high = p.endaddr; | |
13437d4b | 574 | } |
104c1213 JM |
575 | } |
576 | ||
048d532d PA |
577 | /* Add the shared object's sections to the current set of file |
578 | section tables. Do this immediately after mapping the object so | |
579 | that later nodes in the list can query this object, as is needed | |
580 | in solib-osf.c. */ | |
3769e227 | 581 | current_program_space->add_target_sections (so, *so->sections); |
048d532d PA |
582 | |
583 | return 1; | |
104c1213 | 584 | } |
c906108c | 585 | |
0892cb63 DE |
586 | /* Free symbol-file related contents of SO and reset for possible reloading |
587 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
588 | sections in some target's section table, the caller is responsible for | |
589 | removing them. | |
a86988f2 PA |
590 | |
591 | This function doesn't mess with objfiles at all. If there is an | |
592 | objfile associated with SO that needs to be removed, the caller is | |
593 | responsible for taking care of that. */ | |
594 | ||
595 | static void | |
0892cb63 | 596 | clear_so (struct so_list *so) |
a86988f2 | 597 | { |
3641da11 | 598 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0892cb63 | 599 | |
bb2a6777 TT |
600 | delete so->sections; |
601 | so->sections = NULL; | |
a86988f2 PA |
602 | |
603 | gdb_bfd_unref (so->abfd); | |
604 | so->abfd = NULL; | |
605 | ||
606 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
607 | so->symbols_loaded = 0; | |
608 | so->objfile = NULL; | |
609 | ||
610 | so->addr_low = so->addr_high = 0; | |
611 | ||
612 | /* Restore the target-supplied file name. SO_NAME may be the path | |
613 | of the symbol file. */ | |
614 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 DE |
615 | |
616 | /* Do the same for target-specific data. */ | |
617 | if (ops->clear_so != NULL) | |
618 | ops->clear_so (so); | |
a86988f2 PA |
619 | } |
620 | ||
7f86f058 | 621 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 622 | If we have opened a BFD for SO, close it. |
c906108c | 623 | |
07cd4b97 JB |
624 | The caller is responsible for removing SO from whatever list it is |
625 | a member of. If we have placed SO's sections in some target's | |
626 | section table, the caller is responsible for removing them. | |
c906108c | 627 | |
07cd4b97 JB |
628 | This function doesn't mess with objfiles at all. If there is an |
629 | objfile associated with SO that needs to be removed, the caller is | |
630 | responsible for taking care of that. */ | |
631 | ||
13437d4b | 632 | void |
07cd4b97 | 633 | free_so (struct so_list *so) |
c906108c | 634 | { |
3641da11 | 635 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 636 | |
0892cb63 | 637 | clear_so (so); |
66aba65d | 638 | ops->free_so (so); |
07cd4b97 | 639 | |
b8c9b27d | 640 | xfree (so); |
c906108c SS |
641 | } |
642 | ||
07cd4b97 | 643 | |
7eedccfa | 644 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
5b89c67a | 645 | be chatty about it. Return true if any symbols were actually loaded. */ |
42a6e6a0 | 646 | |
5b89c67a | 647 | bool |
b15cc25c | 648 | solib_read_symbols (struct so_list *so, symfile_add_flags flags) |
42a6e6a0 MK |
649 | { |
650 | if (so->symbols_loaded) | |
651 | { | |
a86988f2 | 652 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 653 | } |
8bb75286 DJ |
654 | else if (so->abfd == NULL) |
655 | { | |
048d532d PA |
656 | /* We've already warned about this library, when trying to open |
657 | it. */ | |
8bb75286 | 658 | } |
42a6e6a0 MK |
659 | else |
660 | { | |
048d532d | 661 | |
7dcd53a0 TT |
662 | flags |= current_inferior ()->symfile_flags; |
663 | ||
a70b8144 | 664 | try |
048d532d | 665 | { |
048d532d | 666 | /* Have we already loaded this shared object? */ |
aed57c53 | 667 | so->objfile = nullptr; |
2030c079 | 668 | for (objfile *objfile : current_program_space->objfiles ()) |
048d532d | 669 | { |
aed57c53 TT |
670 | if (filename_cmp (objfile_name (objfile), so->so_name) == 0 |
671 | && objfile->addr_low == so->addr_low) | |
672 | { | |
673 | so->objfile = objfile; | |
674 | break; | |
675 | } | |
048d532d | 676 | } |
9c6595ab PA |
677 | if (so->objfile == NULL) |
678 | { | |
37e136b1 | 679 | section_addr_info sap |
bb2a6777 | 680 | = build_section_addr_info_from_section_table (*so->sections); |
9c6595ab | 681 | so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name, |
37e136b1 TT |
682 | flags, &sap, |
683 | OBJF_SHARED, NULL); | |
9c6595ab | 684 | so->objfile->addr_low = so->addr_low; |
9c6595ab | 685 | } |
492d29ea PA |
686 | |
687 | so->symbols_loaded = 1; | |
688 | } | |
230d2906 | 689 | catch (const gdb_exception_error &e) |
492d29ea PA |
690 | { |
691 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
692 | " library symbols for %s:\n"), | |
693 | so->so_name); | |
048d532d PA |
694 | } |
695 | ||
5b89c67a | 696 | return true; |
42a6e6a0 MK |
697 | } |
698 | ||
5b89c67a | 699 | return false; |
42a6e6a0 | 700 | } |
c906108c | 701 | |
a1fd1ac9 TT |
702 | /* Return true if KNOWN->objfile is used by any other so_list object |
703 | in the list of shared libraries. Return false otherwise. */ | |
59145f8c | 704 | |
5b89c67a | 705 | static bool |
59145f8c AR |
706 | solib_used (const struct so_list *const known) |
707 | { | |
a1fd1ac9 | 708 | for (const struct so_list *pivot : current_program_space->solibs ()) |
59145f8c | 709 | if (pivot != known && pivot->objfile == known->objfile) |
5b89c67a CB |
710 | return true; |
711 | return false; | |
59145f8c AR |
712 | } |
713 | ||
51457a05 | 714 | /* See solib.h. */ |
c906108c | 715 | |
e696b3ad MAL |
716 | void |
717 | update_solib_list (int from_tty) | |
07cd4b97 | 718 | { |
3641da11 | 719 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 720 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
721 | struct so_list *gdb, **gdb_link; |
722 | ||
181e7f93 PA |
723 | /* We can reach here due to changing solib-search-path or the |
724 | sysroot, before having any inferior. */ | |
55f6301a | 725 | if (target_has_execution () && inferior_ptid != null_ptid) |
181e7f93 PA |
726 | { |
727 | struct inferior *inf = current_inferior (); | |
728 | ||
729 | /* If we are attaching to a running process for which we | |
730 | have not opened a symbol file, we may be able to get its | |
731 | symbols now! */ | |
a42d7dd8 TT |
732 | if (inf->attach_flag |
733 | && current_program_space->symfile_object_file == NULL) | |
bf469271 | 734 | { |
a70b8144 | 735 | try |
bf469271 PA |
736 | { |
737 | ops->open_symbol_file_object (from_tty); | |
738 | } | |
230d2906 | 739 | catch (const gdb_exception &ex) |
bf469271 PA |
740 | { |
741 | exception_fprintf (gdb_stderr, ex, | |
742 | "Error reading attached " | |
743 | "process's symbol file.\n"); | |
744 | } | |
bf469271 | 745 | } |
181e7f93 | 746 | } |
104c1213 | 747 | |
07cd4b97 JB |
748 | /* GDB and the inferior's dynamic linker each maintain their own |
749 | list of currently loaded shared objects; we want to bring the | |
750 | former in sync with the latter. Scan both lists, seeing which | |
751 | shared objects appear where. There are three cases: | |
752 | ||
753 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
754 | knows about it already, and it's still loaded in the inferior. |
755 | Nothing needs to happen. | |
07cd4b97 JB |
756 | |
757 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
758 | the inferior has unloaded it. We should remove the shared |
759 | object from GDB's tables. | |
07cd4b97 JB |
760 | |
761 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
762 | means that it's just been loaded. We should add it to GDB's |
763 | tables. | |
07cd4b97 JB |
764 | |
765 | So we walk GDB's list, checking each entry to see if it appears | |
766 | in the inferior's list too. If it does, no action is needed, and | |
767 | we remove it from the inferior's list. If it doesn't, the | |
768 | inferior has unloaded it, and we remove it from GDB's list. By | |
769 | the time we're done walking GDB's list, the inferior's list | |
770 | contains only the new shared objects, which we then add. */ | |
771 | ||
a1fd1ac9 TT |
772 | gdb = current_program_space->so_list; |
773 | gdb_link = ¤t_program_space->so_list; | |
07cd4b97 | 774 | while (gdb) |
c906108c | 775 | { |
07cd4b97 JB |
776 | struct so_list *i = inferior; |
777 | struct so_list **i_link = &inferior; | |
778 | ||
779 | /* Check to see whether the shared object *gdb also appears in | |
780 | the inferior's current list. */ | |
781 | while (i) | |
c906108c | 782 | { |
a7c02bc8 VP |
783 | if (ops->same) |
784 | { | |
785 | if (ops->same (gdb, i)) | |
786 | break; | |
787 | } | |
788 | else | |
789 | { | |
0ba1096a | 790 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
791 | break; |
792 | } | |
07cd4b97 JB |
793 | |
794 | i_link = &i->next; | |
795 | i = *i_link; | |
c906108c | 796 | } |
c5aa993b | 797 | |
07cd4b97 | 798 | /* If the shared object appears on the inferior's list too, then |
dda83cd7 SM |
799 | it's still loaded, so we don't need to do anything. Delete |
800 | it from the inferior's list, and leave it on GDB's list. */ | |
07cd4b97 | 801 | if (i) |
c906108c | 802 | { |
07cd4b97 | 803 | *i_link = i->next; |
07cd4b97 JB |
804 | free_so (i); |
805 | gdb_link = &gdb->next; | |
806 | gdb = *gdb_link; | |
807 | } | |
808 | ||
809 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
810 | else | |
811 | { | |
42a6e6a0 MK |
812 | /* Notify any observer that the shared object has been |
813 | unloaded before we remove it from GDB's tables. */ | |
76727919 | 814 | gdb::observers::solib_unloaded.notify (gdb); |
84acb35a | 815 | |
6fb16ce6 | 816 | current_program_space->deleted_solibs.push_back (gdb->so_name); |
edcc5120 | 817 | |
07cd4b97 | 818 | *gdb_link = gdb->next; |
07cd4b97 JB |
819 | |
820 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
821 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
822 | && !solib_used (gdb)) | |
268e4f09 | 823 | gdb->objfile->unlink (); |
07cd4b97 JB |
824 | |
825 | /* Some targets' section tables might be referring to | |
826 | sections from so->abfd; remove them. */ | |
2a3f84af | 827 | current_program_space->remove_target_sections (gdb); |
07cd4b97 JB |
828 | |
829 | free_so (gdb); | |
830 | gdb = *gdb_link; | |
c906108c SS |
831 | } |
832 | } | |
c5aa993b | 833 | |
07cd4b97 JB |
834 | /* Now the inferior's list contains only shared objects that don't |
835 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 836 | to GDB's shared object list. */ |
07cd4b97 | 837 | if (inferior) |
c906108c | 838 | { |
048d532d PA |
839 | int not_found = 0; |
840 | const char *not_found_filename = NULL; | |
841 | ||
07cd4b97 JB |
842 | struct so_list *i; |
843 | ||
844 | /* Add the new shared objects to GDB's list. */ | |
845 | *gdb_link = inferior; | |
846 | ||
e8930304 | 847 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 848 | for (i = inferior; i; i = i->next) |
c906108c | 849 | { |
048d532d | 850 | |
6c95b8df | 851 | i->pspace = current_program_space; |
bcb430e4 | 852 | current_program_space->added_solibs.push_back (i); |
07cd4b97 | 853 | |
a70b8144 | 854 | try |
048d532d PA |
855 | { |
856 | /* Fill in the rest of the `struct so_list' node. */ | |
857 | if (!solib_map_sections (i)) | |
858 | { | |
859 | not_found++; | |
860 | if (not_found_filename == NULL) | |
861 | not_found_filename = i->so_original_name; | |
862 | } | |
863 | } | |
07cd4b97 | 864 | |
230d2906 | 865 | catch (const gdb_exception_error &e) |
492d29ea PA |
866 | { |
867 | exception_fprintf (gdb_stderr, e, | |
868 | _("Error while mapping shared " | |
869 | "library sections:\n")); | |
870 | } | |
42a6e6a0 MK |
871 | |
872 | /* Notify any observer that the shared object has been | |
048d532d | 873 | loaded now that we've added it to GDB's tables. */ |
76727919 | 874 | gdb::observers::solib_loaded.notify (i); |
c906108c | 875 | } |
048d532d PA |
876 | |
877 | /* If a library was not found, issue an appropriate warning | |
878 | message. We have to use a single call to warning in case the | |
879 | front end does something special with warnings, e.g., pop up | |
880 | a dialog box. It Would Be Nice if we could get a "warning: " | |
881 | prefix on each line in the CLI front end, though - it doesn't | |
882 | stand out well. */ | |
883 | ||
884 | if (not_found == 1) | |
3e43a32a MS |
885 | warning (_("Could not load shared library symbols for %s.\n" |
886 | "Do you need \"set solib-search-path\" " | |
887 | "or \"set sysroot\"?"), | |
048d532d PA |
888 | not_found_filename); |
889 | else if (not_found > 1) | |
890 | warning (_("\ | |
891 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
892 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
893 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
894 | not_found, not_found_filename); | |
e8930304 | 895 | } |
105b175f JB |
896 | } |
897 | ||
17a37d48 PP |
898 | |
899 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
900 | |
901 | Uses a fairly simplistic heuristic approach where we check | |
902 | the file name against "/libpthread". This can lead to false | |
e2b9ea4b KB |
903 | positives, but this should be good enough in practice. |
904 | ||
905 | As of glibc-2.34, functions formerly residing in libpthread have | |
906 | been moved to libc, so "/libc." needs to be checked too. (Matching | |
907 | the "." will avoid matching libraries such as libcrypt.) */ | |
6612ad7f | 908 | |
5b89c67a | 909 | bool |
17a37d48 PP |
910 | libpthread_name_p (const char *name) |
911 | { | |
e2b9ea4b KB |
912 | return (strstr (name, "/libpthread") != NULL |
913 | || strstr (name, "/libc.") != NULL ); | |
17a37d48 PP |
914 | } |
915 | ||
916 | /* Return non-zero if SO is the libpthread shared library. */ | |
917 | ||
5b89c67a | 918 | static bool |
6612ad7f JB |
919 | libpthread_solib_p (struct so_list *so) |
920 | { | |
17a37d48 | 921 | return libpthread_name_p (so->so_name); |
6612ad7f | 922 | } |
105b175f | 923 | |
7f86f058 | 924 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
925 | match PATTERN. (If we've already read a shared object's symbol |
926 | info, leave it alone.) If PATTERN is zero, read them all. | |
927 | ||
990f9fe3 FF |
928 | If READSYMS is 0, defer reading symbolic information until later |
929 | but still do any needed low level processing. | |
930 | ||
e696b3ad | 931 | FROM_TTY is described for update_solib_list, above. */ |
105b175f JB |
932 | |
933 | void | |
e696b3ad | 934 | solib_add (const char *pattern, int from_tty, int readsyms) |
105b175f | 935 | { |
770e7fc7 DE |
936 | if (print_symbol_loading_p (from_tty, 0, 0)) |
937 | { | |
938 | if (pattern != NULL) | |
939 | { | |
940 | printf_unfiltered (_("Loading symbols for shared libraries: %s\n"), | |
941 | pattern); | |
942 | } | |
943 | else | |
944 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
945 | } | |
946 | ||
2eff07b3 PP |
947 | current_program_space->solib_add_generation++; |
948 | ||
105b175f JB |
949 | if (pattern) |
950 | { | |
951 | char *re_err = re_comp (pattern); | |
952 | ||
953 | if (re_err) | |
8a3fe4f8 | 954 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
955 | } |
956 | ||
e696b3ad | 957 | update_solib_list (from_tty); |
c906108c | 958 | |
105b175f JB |
959 | /* Walk the list of currently loaded shared libraries, and read |
960 | symbols for any that match the pattern --- or any whose symbols | |
961 | aren't already loaded, if no pattern was given. */ | |
e8930304 | 962 | { |
5b89c67a CB |
963 | bool any_matches = false; |
964 | bool loaded_any_symbols = false; | |
b15cc25c PA |
965 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
966 | ||
967 | if (from_tty) | |
dda83cd7 | 968 | add_flags |= SYMFILE_VERBOSE; |
c906108c | 969 | |
a1fd1ac9 | 970 | for (struct so_list *gdb : current_program_space->solibs ()) |
e8930304 JB |
971 | if (! pattern || re_exec (gdb->so_name)) |
972 | { | |
dda83cd7 SM |
973 | /* Normally, we would read the symbols from that library |
974 | only if READSYMS is set. However, we're making a small | |
975 | exception for the pthread library, because we sometimes | |
976 | need the library symbols to be loaded in order to provide | |
977 | thread support (x86-linux for instance). */ | |
978 | const int add_this_solib = | |
979 | (readsyms || libpthread_solib_p (gdb)); | |
6612ad7f | 980 | |
5b89c67a | 981 | any_matches = true; |
a86988f2 PA |
982 | if (add_this_solib) |
983 | { | |
984 | if (gdb->symbols_loaded) | |
985 | { | |
986 | /* If no pattern was given, be quiet for shared | |
987 | libraries we have already loaded. */ | |
988 | if (pattern && (from_tty || info_verbose)) | |
989 | printf_unfiltered (_("Symbols already loaded for %s\n"), | |
990 | gdb->so_name); | |
991 | } | |
b15cc25c | 992 | else if (solib_read_symbols (gdb, add_flags)) |
5b89c67a | 993 | loaded_any_symbols = true; |
a86988f2 | 994 | } |
e8930304 JB |
995 | } |
996 | ||
7eedccfa PP |
997 | if (loaded_any_symbols) |
998 | breakpoint_re_set (); | |
999 | ||
e8930304 JB |
1000 | if (from_tty && pattern && ! any_matches) |
1001 | printf_unfiltered | |
1002 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1003 | ||
1004 | if (loaded_any_symbols) | |
1005 | { | |
1006 | /* Getting new symbols may change our opinion about what is | |
1007 | frameless. */ | |
1008 | reinit_frame_cache (); | |
e8930304 JB |
1009 | } |
1010 | } | |
c906108c SS |
1011 | } |
1012 | ||
7f86f058 PA |
1013 | /* Implement the "info sharedlibrary" command. Walk through the |
1014 | shared library list and print information about each attached | |
1015 | library matching PATTERN. If PATTERN is elided, print them | |
1016 | all. */ | |
c906108c SS |
1017 | |
1018 | static void | |
1d12d88f | 1019 | info_sharedlibrary_command (const char *pattern, int from_tty) |
c906108c | 1020 | { |
5b89c67a | 1021 | bool so_missing_debug_info = false; |
c906108c | 1022 | int addr_width; |
55333a84 | 1023 | int nr_libs; |
f5656ead | 1024 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1025 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1026 | |
1027 | if (pattern) | |
1028 | { | |
1029 | char *re_err = re_comp (pattern); | |
1030 | ||
1031 | if (re_err) | |
1032 | error (_("Invalid regexp: %s"), re_err); | |
1033 | } | |
c906108c | 1034 | |
84eb3c4f | 1035 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1036 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1037 | |
e696b3ad | 1038 | update_solib_list (from_tty); |
07cd4b97 | 1039 | |
4a2b031d TT |
1040 | /* ui_out_emit_table table_emitter needs to know the number of rows, |
1041 | so we need to make two passes over the libs. */ | |
55333a84 | 1042 | |
a1fd1ac9 TT |
1043 | nr_libs = 0; |
1044 | for (struct so_list *so : current_program_space->solibs ()) | |
c906108c | 1045 | { |
c5aa993b | 1046 | if (so->so_name[0]) |
c906108c | 1047 | { |
55333a84 DE |
1048 | if (pattern && ! re_exec (so->so_name)) |
1049 | continue; | |
1050 | ++nr_libs; | |
1051 | } | |
1052 | } | |
1053 | ||
4a2b031d TT |
1054 | { |
1055 | ui_out_emit_table table_emitter (uiout, 4, nr_libs, "SharedLibraryTable"); | |
55333a84 | 1056 | |
4a2b031d TT |
1057 | /* The "- 1" is because ui_out adds one space between columns. */ |
1058 | uiout->table_header (addr_width - 1, ui_left, "from", "From"); | |
1059 | uiout->table_header (addr_width - 1, ui_left, "to", "To"); | |
1060 | uiout->table_header (12 - 1, ui_left, "syms-read", "Syms Read"); | |
1061 | uiout->table_header (0, ui_noalign, "name", "Shared Object Library"); | |
55333a84 | 1062 | |
4a2b031d | 1063 | uiout->table_body (); |
55333a84 | 1064 | |
a1fd1ac9 | 1065 | for (struct so_list *so : current_program_space->solibs ()) |
4a2b031d TT |
1066 | { |
1067 | if (! so->so_name[0]) | |
1068 | continue; | |
1069 | if (pattern && ! re_exec (so->so_name)) | |
1070 | continue; | |
1071 | ||
1072 | ui_out_emit_tuple tuple_emitter (uiout, "lib"); | |
1073 | ||
1074 | if (so->addr_high != 0) | |
1075 | { | |
1076 | uiout->field_core_addr ("from", gdbarch, so->addr_low); | |
1077 | uiout->field_core_addr ("to", gdbarch, so->addr_high); | |
1078 | } | |
1079 | else | |
1080 | { | |
1081 | uiout->field_skip ("from"); | |
1082 | uiout->field_skip ("to"); | |
1083 | } | |
1084 | ||
29f94340 | 1085 | if (! top_level_interpreter ()->interp_ui_out ()->is_mi_like_p () |
4a2b031d TT |
1086 | && so->symbols_loaded |
1087 | && !objfile_has_symbols (so->objfile)) | |
1088 | { | |
5b89c67a | 1089 | so_missing_debug_info = true; |
4a2b031d TT |
1090 | uiout->field_string ("syms-read", "Yes (*)"); |
1091 | } | |
1092 | else | |
1093 | uiout->field_string ("syms-read", so->symbols_loaded ? "Yes" : "No"); | |
1094 | ||
e43b10e1 | 1095 | uiout->field_string ("name", so->so_name, file_name_style.style ()); |
4a2b031d TT |
1096 | |
1097 | uiout->text ("\n"); | |
1098 | } | |
1099 | } | |
55333a84 DE |
1100 | |
1101 | if (nr_libs == 0) | |
1102 | { | |
1103 | if (pattern) | |
112e8700 | 1104 | uiout->message (_("No shared libraries matched.\n")); |
55333a84 | 1105 | else |
112e8700 | 1106 | uiout->message (_("No shared libraries loaded at this time.\n")); |
55333a84 DE |
1107 | } |
1108 | else | |
c906108c | 1109 | { |
55333a84 | 1110 | if (so_missing_debug_info) |
112e8700 | 1111 | uiout->message (_("(*): Shared library is missing " |
3e43a32a | 1112 | "debugging information.\n")); |
c906108c SS |
1113 | } |
1114 | } | |
1115 | ||
5b89c67a | 1116 | /* See solib.h. */ |
5fd1a349 | 1117 | |
5b89c67a | 1118 | bool |
5fd1a349 PP |
1119 | solib_contains_address_p (const struct so_list *const solib, |
1120 | CORE_ADDR address) | |
1121 | { | |
76547ab3 TV |
1122 | if (solib->sections == nullptr) |
1123 | return false; | |
1124 | ||
d7a78e5c | 1125 | for (target_section &p : *solib->sections) |
bb2a6777 | 1126 | if (p.addr <= address && address < p.endaddr) |
5b89c67a | 1127 | return true; |
5fd1a349 | 1128 | |
5b89c67a | 1129 | return false; |
5fd1a349 PP |
1130 | } |
1131 | ||
7f86f058 PA |
1132 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1133 | name. | |
c906108c | 1134 | |
7f86f058 PA |
1135 | Provides a hook for other gdb routines to discover whether or not a |
1136 | particular address is within the mapped address space of a shared | |
1137 | library. | |
c906108c | 1138 | |
c5aa993b JM |
1139 | For example, this routine is called at one point to disable |
1140 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1141 | mapped in. */ |
c906108c SS |
1142 | |
1143 | char * | |
6c95b8df | 1144 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1145 | { |
6c95b8df | 1146 | struct so_list *so = NULL; |
c5aa993b | 1147 | |
6c95b8df | 1148 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1149 | if (solib_contains_address_p (so, address)) |
1150 | return (so->so_name); | |
07cd4b97 | 1151 | |
c906108c SS |
1152 | return (0); |
1153 | } | |
1154 | ||
5b89c67a | 1155 | /* See solib.h. */ |
de18c1d8 | 1156 | |
5b89c67a | 1157 | bool |
de18c1d8 JM |
1158 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) |
1159 | { | |
3641da11 | 1160 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
de18c1d8 JM |
1161 | |
1162 | if (ops->keep_data_in_core) | |
5b89c67a | 1163 | return ops->keep_data_in_core (vaddr, size) != 0; |
de18c1d8 | 1164 | else |
5b89c67a | 1165 | return false; |
de18c1d8 JM |
1166 | } |
1167 | ||
c906108c SS |
1168 | /* Called by free_all_symtabs */ |
1169 | ||
c5aa993b | 1170 | void |
fba45db2 | 1171 | clear_solib (void) |
c906108c | 1172 | { |
3641da11 | 1173 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1174 | |
1736a7bd | 1175 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1176 | |
a1fd1ac9 | 1177 | while (current_program_space->so_list) |
c906108c | 1178 | { |
a1fd1ac9 | 1179 | struct so_list *so = current_program_space->so_list; |
433759f7 | 1180 | |
a1fd1ac9 | 1181 | current_program_space->so_list = so->next; |
76727919 | 1182 | gdb::observers::solib_unloaded.notify (so); |
2a3f84af | 1183 | current_program_space->remove_target_sections (so); |
07cd4b97 | 1184 | free_so (so); |
c906108c | 1185 | } |
07cd4b97 | 1186 | |
66aba65d | 1187 | ops->clear_solib (); |
c906108c SS |
1188 | } |
1189 | ||
7f86f058 PA |
1190 | /* Shared library startup support. When GDB starts up the inferior, |
1191 | it nurses it along (through the shell) until it is ready to execute | |
1192 | its first instruction. At this point, this function gets | |
1193 | called. */ | |
c5aa993b JM |
1194 | |
1195 | void | |
268a4a75 | 1196 | solib_create_inferior_hook (int from_tty) |
c906108c | 1197 | { |
3641da11 | 1198 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1199 | |
268a4a75 | 1200 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1201 | } |
1202 | ||
5b89c67a | 1203 | /* See solib.h. */ |
d7fa2ae2 | 1204 | |
5b89c67a | 1205 | bool |
d7fa2ae2 KB |
1206 | in_solib_dynsym_resolve_code (CORE_ADDR pc) |
1207 | { | |
3641da11 | 1208 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1209 | |
5b89c67a | 1210 | return ops->in_dynsym_resolve_code (pc) != 0; |
d7fa2ae2 | 1211 | } |
c906108c | 1212 | |
7f86f058 | 1213 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1214 | |
1215 | static void | |
0b39b52e | 1216 | sharedlibrary_command (const char *args, int from_tty) |
c906108c SS |
1217 | { |
1218 | dont_repeat (); | |
e696b3ad | 1219 | solib_add (args, from_tty, 1); |
c906108c SS |
1220 | } |
1221 | ||
7f86f058 | 1222 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1223 | that have been auto-loaded from shared libraries. Symbols from |
1224 | shared libraries that were added by explicit request of the user | |
1225 | are not discarded. Also called from remote.c. */ | |
1226 | ||
c60a7562 | 1227 | void |
0b39b52e | 1228 | no_shared_libraries (const char *ignored, int from_tty) |
c60a7562 | 1229 | { |
a3247a22 PP |
1230 | /* The order of the two routines below is important: clear_solib notifies |
1231 | the solib_unloaded observers, and some of these observers might need | |
1232 | access to their associated objfiles. Therefore, we can not purge the | |
1233 | solibs' objfiles before clear_solib has been called. */ | |
1234 | ||
615b9dba | 1235 | clear_solib (); |
a3247a22 | 1236 | objfile_purge_solibs (); |
c60a7562 | 1237 | } |
c906108c | 1238 | |
f9e14852 GB |
1239 | /* See solib.h. */ |
1240 | ||
1241 | void | |
1242 | update_solib_breakpoints (void) | |
1243 | { | |
1244 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1245 | ||
1246 | if (ops->update_breakpoints != NULL) | |
1247 | ops->update_breakpoints (); | |
1248 | } | |
1249 | ||
1250 | /* See solib.h. */ | |
1251 | ||
1252 | void | |
1253 | handle_solib_event (void) | |
1254 | { | |
1255 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1256 | ||
1257 | if (ops->handle_event != NULL) | |
1258 | ops->handle_event (); | |
1259 | ||
e39fb971 | 1260 | current_inferior ()->pspace->clear_solib_cache (); |
f9e14852 GB |
1261 | |
1262 | /* Check for any newly added shared libraries if we're supposed to | |
1263 | be adding them automatically. Switch terminal for any messages | |
1264 | produced by breakpoint_re_set. */ | |
223ffa71 | 1265 | target_terminal::ours_for_output (); |
e696b3ad | 1266 | solib_add (NULL, 0, auto_solib_add); |
223ffa71 | 1267 | target_terminal::inferior (); |
f9e14852 GB |
1268 | } |
1269 | ||
a86988f2 PA |
1270 | /* Reload shared libraries, but avoid reloading the same symbol file |
1271 | we already have loaded. */ | |
1272 | ||
1273 | static void | |
1274 | reload_shared_libraries_1 (int from_tty) | |
1275 | { | |
770e7fc7 DE |
1276 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1277 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1278 | ||
a1fd1ac9 | 1279 | for (struct so_list *so : current_program_space->solibs ()) |
a86988f2 | 1280 | { |
b16c44de | 1281 | const char *found_pathname = NULL; |
5b89c67a | 1282 | bool was_loaded = so->symbols_loaded != 0; |
b15cc25c PA |
1283 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1284 | ||
1285 | if (from_tty) | |
1286 | add_flags |= SYMFILE_VERBOSE; | |
a86988f2 | 1287 | |
ee0c3293 TT |
1288 | gdb::unique_xmalloc_ptr<char> filename |
1289 | (tilde_expand (so->so_original_name)); | |
1290 | gdb_bfd_ref_ptr abfd (solib_bfd_open (filename.get ())); | |
a86988f2 | 1291 | if (abfd != NULL) |
ee0c3293 | 1292 | found_pathname = bfd_get_filename (abfd.get ()); |
a86988f2 PA |
1293 | |
1294 | /* If this shared library is no longer associated with its previous | |
1295 | symbol file, close that. */ | |
1296 | if ((found_pathname == NULL && was_loaded) | |
1297 | || (found_pathname != NULL | |
0ba1096a | 1298 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1299 | { |
59145f8c AR |
1300 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1301 | && !solib_used (so)) | |
268e4f09 | 1302 | so->objfile->unlink (); |
2a3f84af | 1303 | current_program_space->remove_target_sections (so); |
0892cb63 | 1304 | clear_so (so); |
a86988f2 PA |
1305 | } |
1306 | ||
1307 | /* If this shared library is now associated with a new symbol | |
1308 | file, open it. */ | |
1309 | if (found_pathname != NULL | |
1310 | && (!was_loaded | |
0ba1096a | 1311 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1312 | { |
5b89c67a | 1313 | bool got_error = false; |
a86988f2 | 1314 | |
a70b8144 | 1315 | try |
492d29ea PA |
1316 | { |
1317 | solib_map_sections (so); | |
1318 | } | |
1319 | ||
230d2906 | 1320 | catch (const gdb_exception_error &e) |
492d29ea PA |
1321 | { |
1322 | exception_fprintf (gdb_stderr, e, | |
1323 | _("Error while mapping " | |
1324 | "shared library sections:\n")); | |
5b89c67a | 1325 | got_error = true; |
492d29ea | 1326 | } |
a86988f2 | 1327 | |
492d29ea PA |
1328 | if (!got_error |
1329 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
b15cc25c | 1330 | solib_read_symbols (so, add_flags); |
a86988f2 PA |
1331 | } |
1332 | } | |
a86988f2 PA |
1333 | } |
1334 | ||
cf466558 | 1335 | static void |
eb4c3f4a | 1336 | reload_shared_libraries (const char *ignored, int from_tty, |
f397e303 | 1337 | struct cmd_list_element *e) |
cf466558 | 1338 | { |
3641da11 | 1339 | const struct target_so_ops *ops; |
a86988f2 PA |
1340 | |
1341 | reload_shared_libraries_1 (from_tty); | |
1342 | ||
f5656ead | 1343 | ops = solib_ops (target_gdbarch ()); |
a86988f2 | 1344 | |
c378eb4e | 1345 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1346 | shared libraries then the address of solib breakpoint we've computed |
1347 | previously might be no longer valid. For example, if we forgot to set | |
1348 | solib-absolute-prefix and are setting it right now, then the previous | |
1349 | breakpoint address is plain wrong. Second, installing solib hooks | |
1350 | also implicitly figures were ld.so is and loads symbols for it. | |
1351 | Absent this call, if we've just connected to a target and set | |
1352 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1353 | about ld.so. */ | |
55f6301a | 1354 | if (target_has_execution ()) |
c8fa6cdd | 1355 | { |
a86988f2 PA |
1356 | /* Reset or free private data structures not associated with |
1357 | so_list entries. */ | |
1358 | ops->clear_solib (); | |
1359 | ||
1360 | /* Remove any previous solib event breakpoint. This is usually | |
1361 | done in common code, at breakpoint_init_inferior time, but | |
1362 | we're not really starting up the inferior here. */ | |
1363 | remove_solib_event_breakpoints (); | |
1364 | ||
268a4a75 | 1365 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1366 | } |
268a4a75 JK |
1367 | |
1368 | /* Sometimes the platform-specific hook loads initial shared | |
1369 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1370 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1371 | made all the inferior hook methods consistent, this call could be | |
1372 | removed. Call it only after the solib target has been initialized by | |
1373 | solib_create_inferior_hook. */ | |
1374 | ||
e696b3ad | 1375 | solib_add (NULL, 0, auto_solib_add); |
268a4a75 | 1376 | |
a86988f2 PA |
1377 | breakpoint_re_set (); |
1378 | ||
1379 | /* We may have loaded or unloaded debug info for some (or all) | |
1380 | shared libraries. However, frames may still reference them. For | |
1381 | example, a frame's unwinder might still point at DWARF FDE | |
1382 | structures that are now freed. Also, getting new symbols may | |
1383 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1384 | reinit_frame_cache (); |
cf466558 KB |
1385 | } |
1386 | ||
2938e6cf GB |
1387 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1388 | at the start of gdb_sysroot with "target:". */ | |
1389 | ||
1390 | static void | |
eb4c3f4a | 1391 | gdb_sysroot_changed (const char *ignored, int from_tty, |
2938e6cf GB |
1392 | struct cmd_list_element *e) |
1393 | { | |
1394 | const char *old_prefix = "remote:"; | |
1395 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1396 | ||
1397 | if (startswith (gdb_sysroot, old_prefix)) | |
1398 | { | |
5b89c67a | 1399 | static bool warning_issued = false; |
2938e6cf GB |
1400 | |
1401 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
1402 | memcpy (gdb_sysroot, new_prefix, strlen (new_prefix)); | |
1403 | ||
1404 | if (!warning_issued) | |
1405 | { | |
1406 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1407 | old_prefix, new_prefix); | |
1408 | warning (_("sysroot set to \"%s\"."), gdb_sysroot); | |
1409 | ||
5b89c67a | 1410 | warning_issued = true; |
2938e6cf GB |
1411 | } |
1412 | } | |
1413 | ||
1414 | reload_shared_libraries (ignored, from_tty, e); | |
1415 | } | |
1416 | ||
920d2a44 AC |
1417 | static void |
1418 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1419 | struct cmd_list_element *c, const char *value) | |
1420 | { | |
1421 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1422 | value); | |
1423 | } | |
1424 | ||
1425 | ||
cb457ae2 YQ |
1426 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1427 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1428 | whether to pick up a symbol. DATA is the input of this callback | |
1429 | function. Return NULL if symbol is not found. */ | |
1430 | ||
1431 | CORE_ADDR | |
1432 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
3953f15c SM |
1433 | int (*match_sym) (const asymbol *, |
1434 | const void *), | |
1435 | const void *data) | |
cb457ae2 YQ |
1436 | { |
1437 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1438 | CORE_ADDR symaddr = 0; | |
1439 | ||
1440 | if (storage_needed > 0) | |
1441 | { | |
1442 | unsigned int i; | |
1443 | ||
1cb1f3da TT |
1444 | gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *)); |
1445 | asymbol **symbol_table = storage.data (); | |
cb457ae2 YQ |
1446 | unsigned int number_of_symbols = |
1447 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1448 | ||
1449 | for (i = 0; i < number_of_symbols; i++) | |
1450 | { | |
1451 | asymbol *sym = *symbol_table++; | |
1452 | ||
1453 | if (match_sym (sym, data)) | |
1454 | { | |
3e29f34a MR |
1455 | struct gdbarch *gdbarch = target_gdbarch (); |
1456 | symaddr = sym->value; | |
1457 | ||
1458 | /* Some ELF targets fiddle with addresses of symbols they | |
dda83cd7 SM |
1459 | consider special. They use minimal symbols to do that |
1460 | and this is needed for correct breakpoint placement, | |
1461 | but we do not have full data here to build a complete | |
1462 | minimal symbol, so just set the address and let the | |
1463 | targets cope with that. */ | |
3e29f34a MR |
1464 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
1465 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1466 | { | |
eefba3da | 1467 | struct minimal_symbol msym {}; |
3e29f34a | 1468 | |
3e29f34a MR |
1469 | SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr); |
1470 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); | |
1471 | symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym); | |
1472 | } | |
1473 | ||
cb457ae2 | 1474 | /* BFD symbols are section relative. */ |
3e29f34a | 1475 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1476 | break; |
1477 | } | |
1478 | } | |
cb457ae2 YQ |
1479 | } |
1480 | ||
1481 | return symaddr; | |
1482 | } | |
1483 | ||
1484 | /* Lookup the value for a specific symbol from symbol table. Look up symbol | |
1485 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1486 | up a symbol. DATA is the input of this callback function. Return NULL | |
1487 | if symbol is not found. */ | |
1488 | ||
1489 | static CORE_ADDR | |
1490 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
3953f15c SM |
1491 | int (*match_sym) (const asymbol *, |
1492 | const void *), | |
1493 | const void *data) | |
cb457ae2 YQ |
1494 | { |
1495 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1496 | CORE_ADDR symaddr = 0; | |
1497 | ||
1498 | if (storage_needed > 0) | |
1499 | { | |
1500 | unsigned int i; | |
1cb1f3da TT |
1501 | gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *)); |
1502 | asymbol **symbol_table = storage.data (); | |
cb457ae2 YQ |
1503 | unsigned int number_of_symbols = |
1504 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1505 | ||
1506 | for (i = 0; i < number_of_symbols; i++) | |
1507 | { | |
1508 | asymbol *sym = *symbol_table++; | |
1509 | ||
1510 | if (match_sym (sym, data)) | |
1511 | { | |
1512 | /* BFD symbols are section relative. */ | |
1513 | symaddr = sym->value + sym->section->vma; | |
1514 | break; | |
1515 | } | |
1516 | } | |
cb457ae2 YQ |
1517 | } |
1518 | return symaddr; | |
1519 | } | |
1520 | ||
1521 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1522 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1523 | function to determine whether to pick up a symbol. DATA is the | |
1524 | input of this callback function. Return NULL if symbol is not | |
1525 | found. */ | |
1526 | ||
1527 | CORE_ADDR | |
1528 | gdb_bfd_lookup_symbol (bfd *abfd, | |
3953f15c SM |
1529 | int (*match_sym) (const asymbol *, const void *), |
1530 | const void *data) | |
cb457ae2 YQ |
1531 | { |
1532 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1533 | ||
1534 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1535 | have to check the dynamic string table too. */ | |
1536 | if (symaddr == 0) | |
1537 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1538 | ||
1539 | return symaddr; | |
1540 | } | |
3a40aaa0 | 1541 | |
a1fd1ac9 TT |
1542 | /* The shared library list may contain user-loaded object files that |
1543 | can be removed out-of-band by the user. So upon notification of | |
1544 | free_objfile remove all references to any user-loaded file that is | |
1545 | about to be freed. */ | |
63644780 NB |
1546 | |
1547 | static void | |
1548 | remove_user_added_objfile (struct objfile *objfile) | |
1549 | { | |
63644780 NB |
1550 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) |
1551 | { | |
a1fd1ac9 | 1552 | for (struct so_list *so : current_program_space->solibs ()) |
63644780 NB |
1553 | if (so->objfile == objfile) |
1554 | so->objfile = NULL; | |
1555 | } | |
1556 | } | |
1557 | ||
6c265988 | 1558 | void _initialize_solib (); |
c906108c | 1559 | void |
6c265988 | 1560 | _initialize_solib () |
c906108c | 1561 | { |
66aba65d MK |
1562 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1563 | ||
c90e7d63 SM |
1564 | gdb::observers::free_objfile.attach (remove_user_added_objfile, |
1565 | "solib"); | |
42a4fec5 SM |
1566 | gdb::observers::inferior_execd.attach ([] (inferior *inf) |
1567 | { | |
1568 | solib_create_inferior_hook (0); | |
c90e7d63 | 1569 | }, "solib"); |
63644780 | 1570 | |
c906108c | 1571 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1572 | _("Load shared object library symbols for files matching REGEXP.")); |
e0f25bd9 SM |
1573 | cmd_list_element *info_sharedlibrary_cmd |
1574 | = add_info ("sharedlibrary", info_sharedlibrary_command, | |
1575 | _("Status of loaded shared object libraries.")); | |
1576 | add_info_alias ("dll", info_sharedlibrary_cmd, 1); | |
c60a7562 | 1577 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1578 | _("Unload all shared object library symbols.")); |
c906108c | 1579 | |
5bf193a2 AC |
1580 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1581 | &auto_solib_add, _("\ | |
1582 | Set autoloading of shared library symbols."), _("\ | |
1583 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1584 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1585 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1586 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1587 | inferior. Otherwise, symbols must be loaded manually, using \ |
1588 | `sharedlibrary'."), | |
5bf193a2 | 1589 | NULL, |
920d2a44 | 1590 | show_auto_solib_add, |
5bf193a2 | 1591 | &setlist, &showlist); |
c906108c | 1592 | |
5e84b7ee SM |
1593 | set_show_commands sysroot_cmds |
1594 | = add_setshow_optional_filename_cmd ("sysroot", class_support, | |
1595 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1596 | Set an alternate system root."), _("\ |
1597 | Show the current system root."), _("\ | |
1598 | The system root is used to load absolute shared library symbol files.\n\ | |
1599 | For other (relative) files, you can add directories using\n\ | |
1600 | `set solib-search-path'."), | |
5e84b7ee SM |
1601 | gdb_sysroot_changed, |
1602 | NULL, | |
1603 | &setlist, &showlist); | |
c906108c | 1604 | |
5e84b7ee | 1605 | add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.set, class_support, 0, |
f822c95b | 1606 | &setlist); |
5e84b7ee | 1607 | add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.show, class_support, 0, |
f822c95b | 1608 | &showlist); |
030292b7 | 1609 | |
525226b5 AC |
1610 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1611 | &solib_search_path, _("\ | |
3e43a32a MS |
1612 | Set the search path for loading non-absolute shared library symbol files."), |
1613 | _("\ | |
1614 | Show the search path for loading non-absolute shared library symbol files."), | |
1615 | _("\ | |
1616 | This takes precedence over the environment variables \ | |
1617 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1618 | reload_shared_libraries, |
920d2a44 | 1619 | show_solib_search_path, |
525226b5 | 1620 | &setlist, &showlist); |
c906108c | 1621 | } |