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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" |
8ddf4645 AM |
38 | #include "elf/external.h" |
39 | #include "elf/common.h" | |
fe4e3eb8 | 40 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 41 | #include "exec.h" |
13437d4b | 42 | #include "solist.h" |
76727919 | 43 | #include "observable.h" |
e0eac551 | 44 | #include "readline/tilde.h" |
f1838a98 | 45 | #include "remote.h" |
2c0b251b | 46 | #include "solib.h" |
55333a84 | 47 | #include "interps.h" |
ab38a727 | 48 | #include "filesystem.h" |
cbb099e8 | 49 | #include "gdb_bfd.h" |
268a13a5 | 50 | #include "gdbsupport/filestuff.h" |
b46a8d7c | 51 | #include "source.h" |
e43b10e1 | 52 | #include "cli/cli-style.h" |
c906108c | 53 | |
66aba65d MK |
54 | /* Architecture-specific operations. */ |
55 | ||
56 | /* Per-architecture data key. */ | |
57 | static struct gdbarch_data *solib_data; | |
58 | ||
59 | static void * | |
60 | solib_init (struct obstack *obstack) | |
61 | { | |
62 | struct target_so_ops **ops; | |
63 | ||
64 | ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *); | |
65 | *ops = current_target_so_ops; | |
66 | return ops; | |
67 | } | |
68 | ||
3641da11 | 69 | static const struct target_so_ops * |
66aba65d MK |
70 | solib_ops (struct gdbarch *gdbarch) |
71 | { | |
19ba03f4 SM |
72 | const struct target_so_ops **ops |
73 | = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data); | |
433759f7 | 74 | |
66aba65d MK |
75 | return *ops; |
76 | } | |
7d522c90 DJ |
77 | |
78 | /* Set the solib operations for GDBARCH to NEW_OPS. */ | |
79 | ||
80 | void | |
3641da11 | 81 | set_solib_ops (struct gdbarch *gdbarch, const struct target_so_ops *new_ops) |
7d522c90 | 82 | { |
19ba03f4 SM |
83 | const struct target_so_ops **ops |
84 | = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data); | |
433759f7 | 85 | |
7d522c90 DJ |
86 | *ops = new_ops; |
87 | } | |
66aba65d MK |
88 | \f |
89 | ||
13437d4b | 90 | /* external data declarations */ |
c906108c | 91 | |
7d522c90 DJ |
92 | /* FIXME: gdbarch needs to control this variable, or else every |
93 | configuration needs to call set_solib_ops. */ | |
13437d4b | 94 | struct target_so_ops *current_target_so_ops; |
23e04971 | 95 | |
c906108c SS |
96 | /* Local function prototypes */ |
97 | ||
c906108c SS |
98 | /* If non-empty, this is a search path for loading non-absolute shared library |
99 | symbol files. This takes precedence over the environment variables PATH | |
100 | and LD_LIBRARY_PATH. */ | |
101 | static char *solib_search_path = NULL; | |
920d2a44 AC |
102 | static void |
103 | show_solib_search_path (struct ui_file *file, int from_tty, | |
104 | struct cmd_list_element *c, const char *value) | |
105 | { | |
3e43a32a MS |
106 | fprintf_filtered (file, _("The search path for loading non-absolute " |
107 | "shared library symbol files is %s.\n"), | |
920d2a44 AC |
108 | value); |
109 | } | |
c906108c | 110 | |
ab38a727 PA |
111 | /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */ |
112 | #if (HAVE_DOS_BASED_FILE_SYSTEM) | |
113 | # define DOS_BASED_FILE_SYSTEM 1 | |
114 | #else | |
115 | # define DOS_BASED_FILE_SYSTEM 0 | |
116 | #endif | |
117 | ||
797bc1cb TT |
118 | /* Return the full pathname of a binary file (the main executable or a |
119 | shared library file), or NULL if not found. If FD is non-NULL, *FD | |
120 | is set to either -1 or an open file handle for the binary file. | |
e4f7b8c8 | 121 | |
f822c95b | 122 | Global variable GDB_SYSROOT is used as a prefix directory |
af1900b0 | 123 | to search for binary files if they have an absolute path. |
b57fbfba GB |
124 | If GDB_SYSROOT starts with "target:" and target filesystem |
125 | is the local filesystem then the "target:" prefix will be | |
126 | stripped before the search starts. This ensures that the | |
127 | same search algorithm is used for local files regardless of | |
128 | whether a "target:" prefix was used. | |
e4f7b8c8 MS |
129 | |
130 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
131 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
b57fbfba | 132 | shared libraries if not found in either the sysroot (if set) or |
af1900b0 GB |
133 | the local filesystem. SOLIB_SEARCH_PATH is not used when searching |
134 | for the main executable. | |
e4f7b8c8 | 135 | |
c8c18e65 | 136 | Search algorithm: |
b57fbfba GB |
137 | * If a sysroot is set and path is absolute: |
138 | * Search for sysroot/path. | |
c8c18e65 KW |
139 | * else |
140 | * Look for it literally (unmodified). | |
af1900b0 GB |
141 | * If IS_SOLIB is non-zero: |
142 | * Look in SOLIB_SEARCH_PATH. | |
143 | * If available, use target defined search function. | |
b57fbfba | 144 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 | 145 | * Look in inferior's $PATH. |
af1900b0 GB |
146 | * If IS_SOLIB is non-zero: |
147 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 148 | * |
85102364 | 149 | * The last check avoids doing this search when targeting remote |
b57fbfba | 150 | * machines since a sysroot will almost always be set. |
7f86f058 | 151 | */ |
e4f7b8c8 | 152 | |
797bc1cb | 153 | static gdb::unique_xmalloc_ptr<char> |
5b89c67a | 154 | solib_find_1 (const char *in_pathname, int *fd, bool is_solib) |
e4f7b8c8 | 155 | { |
3641da11 | 156 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
e4f7b8c8 | 157 | int found_file = -1; |
e0cc99a6 | 158 | gdb::unique_xmalloc_ptr<char> temp_pathname; |
ab38a727 | 159 | const char *fskind = effective_target_file_system_kind (); |
9a897d43 | 160 | const char *sysroot = gdb_sysroot; |
f8773be1 | 161 | int prefix_len, orig_prefix_len; |
08105857 | 162 | |
a3be80c3 GB |
163 | /* If the absolute prefix starts with "target:" but the filesystem |
164 | accessed by the target_fileio_* methods is the local filesystem | |
165 | then we strip the "target:" prefix now and work with the local | |
166 | filesystem. This ensures that the same search algorithm is used | |
167 | for all local files regardless of whether a "target:" prefix was | |
168 | used. */ | |
169 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
170 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
171 | ||
f8773be1 GB |
172 | /* Strip any trailing slashes from the absolute prefix. */ |
173 | prefix_len = orig_prefix_len = strlen (sysroot); | |
f1d10cfb | 174 | |
f8773be1 GB |
175 | while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
176 | prefix_len--; | |
f1d10cfb | 177 | |
9a897d43 | 178 | std::string sysroot_holder; |
f8773be1 GB |
179 | if (prefix_len == 0) |
180 | sysroot = NULL; | |
181 | else if (prefix_len != orig_prefix_len) | |
182 | { | |
9a897d43 TT |
183 | sysroot_holder = std::string (sysroot, prefix_len); |
184 | sysroot = sysroot_holder.c_str (); | |
ab38a727 PA |
185 | } |
186 | ||
187 | /* If we're on a non-DOS-based system, backslashes won't be | |
188 | understood as directory separator, so, convert them to forward | |
189 | slashes, iff we're supposed to handle DOS-based file system | |
190 | semantics for target paths. */ | |
191 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
192 | { | |
193 | char *p; | |
194 | ||
195 | /* Avoid clobbering our input. */ | |
224c3ddb | 196 | p = (char *) alloca (strlen (in_pathname) + 1); |
ab38a727 PA |
197 | strcpy (p, in_pathname); |
198 | in_pathname = p; | |
199 | ||
200 | for (; *p; p++) | |
201 | { | |
202 | if (*p == '\\') | |
203 | *p = '/'; | |
204 | } | |
205 | } | |
206 | ||
207 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
208 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
209 | IN_PATHNAME is a target path. For example, if we're supposed to | |
210 | be handling DOS-like semantics we want to consider a | |
211 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
212 | With such a path, before giving up on the sysroot, we'll try: | |
213 | ||
214 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
215 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
216 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
217 | */ | |
218 | ||
b57fbfba | 219 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
e0cc99a6 | 220 | temp_pathname.reset (xstrdup (in_pathname)); |
ab38a727 PA |
221 | else |
222 | { | |
5b89c67a | 223 | bool need_dir_separator; |
ab38a727 | 224 | |
3736004f PA |
225 | /* Concatenate the sysroot and the target reported filename. We |
226 | may need to glue them with a directory separator. Cases to | |
227 | consider: | |
228 | ||
dda83cd7 SM |
229 | | sysroot | separator | in_pathname | |
230 | |-----------------+-----------+----------------| | |
231 | | /some/dir | / | c:/foo/bar.dll | | |
232 | | /some/dir | | /foo/bar.dll | | |
233 | | target: | | c:/foo/bar.dll | | |
234 | | target: | | /foo/bar.dll | | |
235 | | target:some/dir | / | c:/foo/bar.dll | | |
236 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
237 | |
238 | IOW, we don't need to add a separator if IN_PATHNAME already | |
6471e7d2 | 239 | has one, or when the sysroot is exactly "target:". |
3736004f PA |
240 | There's no need to check for drive spec explicitly, as we only |
241 | get here if IN_PATHNAME is considered an absolute path. */ | |
242 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 243 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 244 | |
f1d10cfb | 245 | /* Cat the prefixed pathname together. */ |
e0cc99a6 TT |
246 | temp_pathname.reset (concat (sysroot, |
247 | need_dir_separator ? SLASH_STRING : "", | |
248 | in_pathname, (char *) NULL)); | |
e4f7b8c8 MS |
249 | } |
250 | ||
2938e6cf | 251 | /* Handle files to be accessed via the target. */ |
e0cc99a6 | 252 | if (is_target_filename (temp_pathname.get ())) |
f1838a98 | 253 | { |
998d2a3e GB |
254 | if (fd != NULL) |
255 | *fd = -1; | |
e0cc99a6 | 256 | return temp_pathname; |
f1838a98 UW |
257 | } |
258 | ||
f1d10cfb | 259 | /* Now see if we can open it. */ |
e0cc99a6 | 260 | found_file = gdb_open_cloexec (temp_pathname.get (), O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
261 | |
262 | /* If the search in gdb_sysroot failed, and the path name has a | |
263 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
264 | and retrying in the sysroot: | |
265 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 266 | |
ab38a727 | 267 | if (found_file < 0 |
b57fbfba | 268 | && sysroot != NULL |
ab38a727 PA |
269 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
270 | { | |
5b89c67a | 271 | bool need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); |
e0cc99a6 | 272 | char drive[2] = { in_pathname[0], '\0' }; |
ab38a727 | 273 | |
e0cc99a6 TT |
274 | temp_pathname.reset (concat (sysroot, |
275 | SLASH_STRING, | |
276 | drive, | |
277 | need_dir_separator ? SLASH_STRING : "", | |
278 | in_pathname + 2, (char *) NULL)); | |
ab38a727 | 279 | |
e0cc99a6 TT |
280 | found_file = gdb_open_cloexec (temp_pathname.get (), |
281 | O_RDONLY | O_BINARY, 0); | |
ab38a727 PA |
282 | if (found_file < 0) |
283 | { | |
ab38a727 PA |
284 | /* If the search in gdb_sysroot still failed, try fully |
285 | stripping the drive spec, and trying once more in the | |
286 | sysroot before giving up. | |
287 | ||
288 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
289 | ||
e0cc99a6 TT |
290 | temp_pathname.reset (concat (sysroot, |
291 | need_dir_separator ? SLASH_STRING : "", | |
292 | in_pathname + 2, (char *) NULL)); | |
ab38a727 | 293 | |
e0cc99a6 TT |
294 | found_file = gdb_open_cloexec (temp_pathname.get (), |
295 | O_RDONLY | O_BINARY, 0); | |
ab38a727 PA |
296 | } |
297 | } | |
0997b535 | 298 | |
ab38a727 PA |
299 | /* We try to find the library in various ways. After each attempt, |
300 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
301 | found_file < 0 and temp_pathname does not point to storage that | |
302 | needs to be freed. */ | |
303 | ||
304 | if (found_file < 0) | |
e0cc99a6 | 305 | temp_pathname.reset (NULL); |
ab38a727 | 306 | |
f822c95b | 307 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
308 | absolute at this point, make it relative. (openp will try and open the |
309 | file according to its absolute path otherwise, which is not what we want.) | |
310 | Affects subsequent searches for this solib. */ | |
ab38a727 | 311 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
312 | { |
313 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
314 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
315 | in_pathname++; | |
ba5f0d88 OF |
316 | |
317 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
318 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
319 | in_pathname++; | |
ba5f0d88 | 320 | } |
ab38a727 | 321 | |
af1900b0 GB |
322 | /* If not found, and we're looking for a solib, search the |
323 | solib_search_path (if any). */ | |
324 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
325 | found_file = openp (solib_search_path, |
326 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
fbdebf46 | 327 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 328 | |
af1900b0 GB |
329 | /* If not found, and we're looking for a solib, next search the |
330 | solib_search_path (if any) for the basename only (ignoring the | |
331 | path). This is to allow reading solibs from a path that differs | |
332 | from the opened path. */ | |
333 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
334 | found_file = openp (solib_search_path, |
335 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
ab38a727 PA |
336 | target_lbasename (fskind, in_pathname), |
337 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 338 | |
af1900b0 GB |
339 | /* If not found, and we're looking for a solib, try to use target |
340 | supplied solib search method. */ | |
341 | if (is_solib && found_file < 0 && ops->find_and_open_solib) | |
637d6690 | 342 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 343 | &temp_pathname); |
2610b0bf | 344 | |
c378eb4e | 345 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 346 | if (found_file < 0 && sysroot == NULL) |
9a6c7d9c | 347 | found_file = openp (current_inferior ()->environment.get ("PATH"), |
492c0ab7 JK |
348 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
349 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 350 | |
af1900b0 GB |
351 | /* If not found, and we're looking for a solib, next search the |
352 | inferior's $LD_LIBRARY_PATH environment variable. */ | |
353 | if (is_solib && found_file < 0 && sysroot == NULL) | |
9a6c7d9c SDJ |
354 | found_file = openp (current_inferior ()->environment.get |
355 | ("LD_LIBRARY_PATH"), | |
492c0ab7 JK |
356 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
357 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 358 | |
998d2a3e GB |
359 | if (fd == NULL) |
360 | { | |
361 | if (found_file >= 0) | |
362 | close (found_file); | |
363 | } | |
364 | else | |
365 | *fd = found_file; | |
366 | ||
e0cc99a6 | 367 | return temp_pathname; |
572d275c UW |
368 | } |
369 | ||
af1900b0 | 370 | /* Return the full pathname of the main executable, or NULL if not |
797bc1cb TT |
371 | found. If FD is non-NULL, *FD is set to either -1 or an open file |
372 | handle for the main executable. */ | |
af1900b0 | 373 | |
797bc1cb | 374 | gdb::unique_xmalloc_ptr<char> |
992f1ddc | 375 | exec_file_find (const char *in_pathname, int *fd) |
af1900b0 | 376 | { |
797bc1cb | 377 | gdb::unique_xmalloc_ptr<char> result; |
ecf45d2c SL |
378 | const char *fskind = effective_target_file_system_kind (); |
379 | ||
380 | if (in_pathname == NULL) | |
381 | return NULL; | |
af1900b0 | 382 | |
ecf45d2c | 383 | if (*gdb_sysroot != '\0' && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
af1900b0 | 384 | { |
5b89c67a | 385 | result = solib_find_1 (in_pathname, fd, false); |
af1900b0 | 386 | |
ecf45d2c | 387 | if (result == NULL && fskind == file_system_kind_dos_based) |
af1900b0 GB |
388 | { |
389 | char *new_pathname; | |
390 | ||
224c3ddb | 391 | new_pathname = (char *) alloca (strlen (in_pathname) + 5); |
af1900b0 GB |
392 | strcpy (new_pathname, in_pathname); |
393 | strcat (new_pathname, ".exe"); | |
394 | ||
5b89c67a | 395 | result = solib_find_1 (new_pathname, fd, false); |
af1900b0 GB |
396 | } |
397 | } | |
ecf45d2c SL |
398 | else |
399 | { | |
400 | /* It's possible we don't have a full path, but rather just a | |
401 | filename. Some targets, such as HP-UX, don't provide the | |
402 | full path, sigh. | |
403 | ||
404 | Attempt to qualify the filename against the source path. | |
405 | (If that fails, we'll just fall back on the original | |
406 | filename. Not much more we can do...) */ | |
407 | ||
e0cc99a6 | 408 | if (!source_full_path_of (in_pathname, &result)) |
797bc1cb | 409 | result.reset (xstrdup (in_pathname)); |
ecf45d2c SL |
410 | if (fd != NULL) |
411 | *fd = -1; | |
412 | } | |
af1900b0 GB |
413 | |
414 | return result; | |
415 | } | |
416 | ||
417 | /* Return the full pathname of a shared library file, or NULL if not | |
797bc1cb TT |
418 | found. If FD is non-NULL, *FD is set to either -1 or an open file |
419 | handle for the shared library. | |
af1900b0 GB |
420 | |
421 | The search algorithm used is described in solib_find_1's comment | |
422 | above. */ | |
423 | ||
797bc1cb | 424 | gdb::unique_xmalloc_ptr<char> |
992f1ddc | 425 | solib_find (const char *in_pathname, int *fd) |
af1900b0 GB |
426 | { |
427 | const char *solib_symbols_extension | |
428 | = gdbarch_solib_symbols_extension (target_gdbarch ()); | |
429 | ||
430 | /* If solib_symbols_extension is set, replace the file's | |
431 | extension. */ | |
432 | if (solib_symbols_extension != NULL) | |
433 | { | |
992f1ddc | 434 | const char *p = in_pathname + strlen (in_pathname); |
af1900b0 GB |
435 | |
436 | while (p > in_pathname && *p != '.') | |
437 | p--; | |
438 | ||
439 | if (*p == '.') | |
440 | { | |
441 | char *new_pathname; | |
442 | ||
224c3ddb SM |
443 | new_pathname |
444 | = (char *) alloca (p - in_pathname + 1 | |
445 | + strlen (solib_symbols_extension) + 1); | |
af1900b0 GB |
446 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); |
447 | strcpy (new_pathname + (p - in_pathname) + 1, | |
448 | solib_symbols_extension); | |
449 | ||
450 | in_pathname = new_pathname; | |
451 | } | |
452 | } | |
453 | ||
5b89c67a | 454 | return solib_find_1 (in_pathname, fd, true); |
af1900b0 GB |
455 | } |
456 | ||
572d275c UW |
457 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, |
458 | it is used as file handle to open the file. Throws an error if the file | |
459 | could not be opened. Handles both local and remote file access. | |
460 | ||
797bc1cb | 461 | If unsuccessful, the FD will be closed (unless FD was -1). */ |
572d275c | 462 | |
192b62ce | 463 | gdb_bfd_ref_ptr |
797bc1cb | 464 | solib_bfd_fopen (const char *pathname, int fd) |
572d275c | 465 | { |
192b62ce | 466 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (pathname, gnutarget, fd)); |
572d275c | 467 | |
192b62ce TT |
468 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd.get ())) |
469 | bfd_set_cacheable (abfd.get (), 1); | |
f1838a98 | 470 | |
192b62ce | 471 | if (abfd == NULL) |
f1838a98 | 472 | { |
9a897d43 | 473 | /* Arrange to free PATHNAME when the error is thrown. */ |
f1838a98 | 474 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 475 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
476 | } |
477 | ||
520b0001 | 478 | return abfd; |
572d275c UW |
479 | } |
480 | ||
481 | /* Find shared library PATHNAME and open a BFD for it. */ | |
482 | ||
192b62ce | 483 | gdb_bfd_ref_ptr |
692d6f97 | 484 | solib_bfd_open (const char *pathname) |
572d275c | 485 | { |
572d275c | 486 | int found_file; |
378d2b72 | 487 | const struct bfd_arch_info *b; |
572d275c | 488 | |
572d275c | 489 | /* Search for shared library file. */ |
797bc1cb TT |
490 | gdb::unique_xmalloc_ptr<char> found_pathname |
491 | = solib_find (pathname, &found_file); | |
572d275c | 492 | if (found_pathname == NULL) |
048d532d PA |
493 | { |
494 | /* Return failure if the file could not be found, so that we can | |
495 | accumulate messages about missing libraries. */ | |
496 | if (errno == ENOENT) | |
497 | return NULL; | |
498 | ||
499 | perror_with_name (pathname); | |
500 | } | |
572d275c UW |
501 | |
502 | /* Open bfd for shared library. */ | |
797bc1cb | 503 | gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname.get (), found_file)); |
572d275c UW |
504 | |
505 | /* Check bfd format. */ | |
192b62ce TT |
506 | if (!bfd_check_format (abfd.get (), bfd_object)) |
507 | error (_("`%s': not in executable format: %s"), | |
00f93c44 | 508 | bfd_get_filename (abfd.get ()), bfd_errmsg (bfd_get_error ())); |
f1838a98 | 509 | |
378d2b72 | 510 | /* Check bfd arch. */ |
f5656ead | 511 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
192b62ce | 512 | if (!b->compatible (b, bfd_get_arch_info (abfd.get ()))) |
378d2b72 | 513 | warning (_("`%s': Shared library architecture %s is not compatible " |
00f93c44 AM |
514 | "with target architecture %s."), bfd_get_filename (abfd.get ()), |
515 | bfd_get_arch_info (abfd.get ())->printable_name, | |
192b62ce | 516 | b->printable_name); |
378d2b72 | 517 | |
f1838a98 | 518 | return abfd; |
e4f7b8c8 MS |
519 | } |
520 | ||
7f86f058 PA |
521 | /* Given a pointer to one of the shared objects in our list of mapped |
522 | objects, use the recorded name to open a bfd descriptor for the | |
523 | object, build a section table, relocate all the section addresses | |
524 | by the base address at which the shared object was mapped, and then | |
525 | add the sections to the target's section table. | |
e4f7b8c8 | 526 | |
7f86f058 PA |
527 | FIXME: In most (all?) cases the shared object file name recorded in |
528 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
529 | cases where it isn't, do we really mimic the systems search |
530 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 531 | expansion stuff?). */ |
c906108c SS |
532 | |
533 | static int | |
048d532d | 534 | solib_map_sections (struct so_list *so) |
c906108c | 535 | { |
3641da11 | 536 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 537 | |
ee0c3293 TT |
538 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (so->so_name)); |
539 | gdb_bfd_ref_ptr abfd (ops->bfd_open (filename.get ())); | |
e4f7b8c8 | 540 | |
048d532d PA |
541 | if (abfd == NULL) |
542 | return 0; | |
543 | ||
13437d4b | 544 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
192b62ce | 545 | so->abfd = abfd.release (); |
23e04971 | 546 | |
b030cf11 JB |
547 | /* Copy the full path name into so_name, allowing symbol_file_add |
548 | to find it later. This also affects the =library-loaded GDB/MI | |
549 | event, and in particular the part of that notification providing | |
550 | the library's host-side path. If we let the target dictate | |
551 | that objfile's path, and the target is different from the host, | |
552 | GDB/MI will not provide the correct host-side path. */ | |
192b62ce | 553 | if (strlen (bfd_get_filename (so->abfd)) >= SO_NAME_MAX_PATH_SIZE) |
b030cf11 | 554 | error (_("Shared library file name is too long.")); |
192b62ce | 555 | strcpy (so->so_name, bfd_get_filename (so->abfd)); |
b030cf11 | 556 | |
bb2a6777 TT |
557 | if (so->sections == nullptr) |
558 | so->sections = new target_section_table; | |
2d128614 | 559 | *so->sections = build_section_table (so->abfd); |
104c1213 | 560 | |
d7a78e5c | 561 | for (target_section &p : *so->sections) |
104c1213 | 562 | { |
13437d4b | 563 | /* Relocate the section binding addresses as recorded in the shared |
dda83cd7 SM |
564 | object's file by the base address to which the object was actually |
565 | mapped. */ | |
bb2a6777 | 566 | ops->relocate_section_addresses (so, &p); |
cfa9d6d9 DJ |
567 | |
568 | /* If the target didn't provide information about the address | |
569 | range of the shared object, assume we want the location of | |
570 | the .text section. */ | |
571 | if (so->addr_low == 0 && so->addr_high == 0 | |
bb2a6777 | 572 | && strcmp (p.the_bfd_section->name, ".text") == 0) |
13437d4b | 573 | { |
bb2a6777 TT |
574 | so->addr_low = p.addr; |
575 | so->addr_high = p.endaddr; | |
13437d4b | 576 | } |
104c1213 JM |
577 | } |
578 | ||
048d532d PA |
579 | /* Add the shared object's sections to the current set of file |
580 | section tables. Do this immediately after mapping the object so | |
581 | that later nodes in the list can query this object, as is needed | |
582 | in solib-osf.c. */ | |
3769e227 | 583 | current_program_space->add_target_sections (so, *so->sections); |
048d532d PA |
584 | |
585 | return 1; | |
104c1213 | 586 | } |
c906108c | 587 | |
0892cb63 DE |
588 | /* Free symbol-file related contents of SO and reset for possible reloading |
589 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
590 | sections in some target's section table, the caller is responsible for | |
591 | removing them. | |
a86988f2 PA |
592 | |
593 | This function doesn't mess with objfiles at all. If there is an | |
594 | objfile associated with SO that needs to be removed, the caller is | |
595 | responsible for taking care of that. */ | |
596 | ||
597 | static void | |
0892cb63 | 598 | clear_so (struct so_list *so) |
a86988f2 | 599 | { |
3641da11 | 600 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0892cb63 | 601 | |
bb2a6777 TT |
602 | delete so->sections; |
603 | so->sections = NULL; | |
a86988f2 PA |
604 | |
605 | gdb_bfd_unref (so->abfd); | |
606 | so->abfd = NULL; | |
607 | ||
608 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
609 | so->symbols_loaded = 0; | |
610 | so->objfile = NULL; | |
611 | ||
612 | so->addr_low = so->addr_high = 0; | |
613 | ||
614 | /* Restore the target-supplied file name. SO_NAME may be the path | |
615 | of the symbol file. */ | |
616 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 DE |
617 | |
618 | /* Do the same for target-specific data. */ | |
619 | if (ops->clear_so != NULL) | |
620 | ops->clear_so (so); | |
a86988f2 PA |
621 | } |
622 | ||
7f86f058 | 623 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 624 | If we have opened a BFD for SO, close it. |
c906108c | 625 | |
07cd4b97 JB |
626 | The caller is responsible for removing SO from whatever list it is |
627 | a member of. If we have placed SO's sections in some target's | |
628 | section table, the caller is responsible for removing them. | |
c906108c | 629 | |
07cd4b97 JB |
630 | This function doesn't mess with objfiles at all. If there is an |
631 | objfile associated with SO that needs to be removed, the caller is | |
632 | responsible for taking care of that. */ | |
633 | ||
13437d4b | 634 | void |
07cd4b97 | 635 | free_so (struct so_list *so) |
c906108c | 636 | { |
3641da11 | 637 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 638 | |
0892cb63 | 639 | clear_so (so); |
66aba65d | 640 | ops->free_so (so); |
07cd4b97 | 641 | |
b8c9b27d | 642 | xfree (so); |
c906108c SS |
643 | } |
644 | ||
07cd4b97 | 645 | |
7eedccfa | 646 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
5b89c67a | 647 | be chatty about it. Return true if any symbols were actually loaded. */ |
42a6e6a0 | 648 | |
5b89c67a | 649 | bool |
b15cc25c | 650 | solib_read_symbols (struct so_list *so, symfile_add_flags flags) |
42a6e6a0 MK |
651 | { |
652 | if (so->symbols_loaded) | |
653 | { | |
a86988f2 | 654 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 655 | } |
8bb75286 DJ |
656 | else if (so->abfd == NULL) |
657 | { | |
048d532d PA |
658 | /* We've already warned about this library, when trying to open |
659 | it. */ | |
8bb75286 | 660 | } |
42a6e6a0 MK |
661 | else |
662 | { | |
048d532d | 663 | |
7dcd53a0 TT |
664 | flags |= current_inferior ()->symfile_flags; |
665 | ||
a70b8144 | 666 | try |
048d532d | 667 | { |
048d532d | 668 | /* Have we already loaded this shared object? */ |
aed57c53 | 669 | so->objfile = nullptr; |
2030c079 | 670 | for (objfile *objfile : current_program_space->objfiles ()) |
048d532d | 671 | { |
aed57c53 TT |
672 | if (filename_cmp (objfile_name (objfile), so->so_name) == 0 |
673 | && objfile->addr_low == so->addr_low) | |
674 | { | |
675 | so->objfile = objfile; | |
676 | break; | |
677 | } | |
048d532d | 678 | } |
9c6595ab PA |
679 | if (so->objfile == NULL) |
680 | { | |
37e136b1 | 681 | section_addr_info sap |
bb2a6777 | 682 | = build_section_addr_info_from_section_table (*so->sections); |
9c6595ab | 683 | so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name, |
37e136b1 TT |
684 | flags, &sap, |
685 | OBJF_SHARED, NULL); | |
9c6595ab | 686 | so->objfile->addr_low = so->addr_low; |
9c6595ab | 687 | } |
492d29ea PA |
688 | |
689 | so->symbols_loaded = 1; | |
690 | } | |
230d2906 | 691 | catch (const gdb_exception_error &e) |
492d29ea PA |
692 | { |
693 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
694 | " library symbols for %s:\n"), | |
695 | so->so_name); | |
048d532d PA |
696 | } |
697 | ||
5b89c67a | 698 | return true; |
42a6e6a0 MK |
699 | } |
700 | ||
5b89c67a | 701 | return false; |
42a6e6a0 | 702 | } |
c906108c | 703 | |
a1fd1ac9 TT |
704 | /* Return true if KNOWN->objfile is used by any other so_list object |
705 | in the list of shared libraries. Return false otherwise. */ | |
59145f8c | 706 | |
5b89c67a | 707 | static bool |
59145f8c AR |
708 | solib_used (const struct so_list *const known) |
709 | { | |
a1fd1ac9 | 710 | for (const struct so_list *pivot : current_program_space->solibs ()) |
59145f8c | 711 | if (pivot != known && pivot->objfile == known->objfile) |
5b89c67a CB |
712 | return true; |
713 | return false; | |
59145f8c AR |
714 | } |
715 | ||
51457a05 | 716 | /* See solib.h. */ |
c906108c | 717 | |
e696b3ad MAL |
718 | void |
719 | update_solib_list (int from_tty) | |
07cd4b97 | 720 | { |
3641da11 | 721 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 722 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
723 | struct so_list *gdb, **gdb_link; |
724 | ||
181e7f93 PA |
725 | /* We can reach here due to changing solib-search-path or the |
726 | sysroot, before having any inferior. */ | |
55f6301a | 727 | if (target_has_execution () && inferior_ptid != null_ptid) |
181e7f93 PA |
728 | { |
729 | struct inferior *inf = current_inferior (); | |
730 | ||
731 | /* If we are attaching to a running process for which we | |
732 | have not opened a symbol file, we may be able to get its | |
733 | symbols now! */ | |
a42d7dd8 TT |
734 | if (inf->attach_flag |
735 | && current_program_space->symfile_object_file == NULL) | |
bf469271 | 736 | { |
a70b8144 | 737 | try |
bf469271 PA |
738 | { |
739 | ops->open_symbol_file_object (from_tty); | |
740 | } | |
230d2906 | 741 | catch (const gdb_exception &ex) |
bf469271 PA |
742 | { |
743 | exception_fprintf (gdb_stderr, ex, | |
744 | "Error reading attached " | |
745 | "process's symbol file.\n"); | |
746 | } | |
bf469271 | 747 | } |
181e7f93 | 748 | } |
104c1213 | 749 | |
07cd4b97 JB |
750 | /* GDB and the inferior's dynamic linker each maintain their own |
751 | list of currently loaded shared objects; we want to bring the | |
752 | former in sync with the latter. Scan both lists, seeing which | |
753 | shared objects appear where. There are three cases: | |
754 | ||
755 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
756 | knows about it already, and it's still loaded in the inferior. |
757 | Nothing needs to happen. | |
07cd4b97 JB |
758 | |
759 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
760 | the inferior has unloaded it. We should remove the shared |
761 | object from GDB's tables. | |
07cd4b97 JB |
762 | |
763 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
764 | means that it's just been loaded. We should add it to GDB's |
765 | tables. | |
07cd4b97 JB |
766 | |
767 | So we walk GDB's list, checking each entry to see if it appears | |
768 | in the inferior's list too. If it does, no action is needed, and | |
769 | we remove it from the inferior's list. If it doesn't, the | |
770 | inferior has unloaded it, and we remove it from GDB's list. By | |
771 | the time we're done walking GDB's list, the inferior's list | |
772 | contains only the new shared objects, which we then add. */ | |
773 | ||
a1fd1ac9 TT |
774 | gdb = current_program_space->so_list; |
775 | gdb_link = ¤t_program_space->so_list; | |
07cd4b97 | 776 | while (gdb) |
c906108c | 777 | { |
07cd4b97 JB |
778 | struct so_list *i = inferior; |
779 | struct so_list **i_link = &inferior; | |
780 | ||
781 | /* Check to see whether the shared object *gdb also appears in | |
782 | the inferior's current list. */ | |
783 | while (i) | |
c906108c | 784 | { |
a7c02bc8 VP |
785 | if (ops->same) |
786 | { | |
787 | if (ops->same (gdb, i)) | |
788 | break; | |
789 | } | |
790 | else | |
791 | { | |
0ba1096a | 792 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
793 | break; |
794 | } | |
07cd4b97 JB |
795 | |
796 | i_link = &i->next; | |
797 | i = *i_link; | |
c906108c | 798 | } |
c5aa993b | 799 | |
07cd4b97 | 800 | /* If the shared object appears on the inferior's list too, then |
dda83cd7 SM |
801 | it's still loaded, so we don't need to do anything. Delete |
802 | it from the inferior's list, and leave it on GDB's list. */ | |
07cd4b97 | 803 | if (i) |
c906108c | 804 | { |
07cd4b97 | 805 | *i_link = i->next; |
07cd4b97 JB |
806 | free_so (i); |
807 | gdb_link = &gdb->next; | |
808 | gdb = *gdb_link; | |
809 | } | |
810 | ||
811 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
812 | else | |
813 | { | |
42a6e6a0 MK |
814 | /* Notify any observer that the shared object has been |
815 | unloaded before we remove it from GDB's tables. */ | |
76727919 | 816 | gdb::observers::solib_unloaded.notify (gdb); |
84acb35a | 817 | |
6fb16ce6 | 818 | current_program_space->deleted_solibs.push_back (gdb->so_name); |
edcc5120 | 819 | |
07cd4b97 | 820 | *gdb_link = gdb->next; |
07cd4b97 JB |
821 | |
822 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
823 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
824 | && !solib_used (gdb)) | |
268e4f09 | 825 | gdb->objfile->unlink (); |
07cd4b97 JB |
826 | |
827 | /* Some targets' section tables might be referring to | |
828 | sections from so->abfd; remove them. */ | |
2a3f84af | 829 | current_program_space->remove_target_sections (gdb); |
07cd4b97 JB |
830 | |
831 | free_so (gdb); | |
832 | gdb = *gdb_link; | |
c906108c SS |
833 | } |
834 | } | |
c5aa993b | 835 | |
07cd4b97 JB |
836 | /* Now the inferior's list contains only shared objects that don't |
837 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 838 | to GDB's shared object list. */ |
07cd4b97 | 839 | if (inferior) |
c906108c | 840 | { |
048d532d PA |
841 | int not_found = 0; |
842 | const char *not_found_filename = NULL; | |
843 | ||
07cd4b97 JB |
844 | struct so_list *i; |
845 | ||
846 | /* Add the new shared objects to GDB's list. */ | |
847 | *gdb_link = inferior; | |
848 | ||
e8930304 | 849 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 850 | for (i = inferior; i; i = i->next) |
c906108c | 851 | { |
048d532d | 852 | |
6c95b8df | 853 | i->pspace = current_program_space; |
bcb430e4 | 854 | current_program_space->added_solibs.push_back (i); |
07cd4b97 | 855 | |
a70b8144 | 856 | try |
048d532d PA |
857 | { |
858 | /* Fill in the rest of the `struct so_list' node. */ | |
859 | if (!solib_map_sections (i)) | |
860 | { | |
861 | not_found++; | |
862 | if (not_found_filename == NULL) | |
863 | not_found_filename = i->so_original_name; | |
864 | } | |
865 | } | |
07cd4b97 | 866 | |
230d2906 | 867 | catch (const gdb_exception_error &e) |
492d29ea PA |
868 | { |
869 | exception_fprintf (gdb_stderr, e, | |
870 | _("Error while mapping shared " | |
871 | "library sections:\n")); | |
872 | } | |
42a6e6a0 MK |
873 | |
874 | /* Notify any observer that the shared object has been | |
048d532d | 875 | loaded now that we've added it to GDB's tables. */ |
76727919 | 876 | gdb::observers::solib_loaded.notify (i); |
c906108c | 877 | } |
048d532d PA |
878 | |
879 | /* If a library was not found, issue an appropriate warning | |
880 | message. We have to use a single call to warning in case the | |
881 | front end does something special with warnings, e.g., pop up | |
882 | a dialog box. It Would Be Nice if we could get a "warning: " | |
883 | prefix on each line in the CLI front end, though - it doesn't | |
884 | stand out well. */ | |
885 | ||
886 | if (not_found == 1) | |
3e43a32a MS |
887 | warning (_("Could not load shared library symbols for %s.\n" |
888 | "Do you need \"set solib-search-path\" " | |
889 | "or \"set sysroot\"?"), | |
048d532d PA |
890 | not_found_filename); |
891 | else if (not_found > 1) | |
892 | warning (_("\ | |
893 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
894 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
895 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
896 | not_found, not_found_filename); | |
e8930304 | 897 | } |
105b175f JB |
898 | } |
899 | ||
17a37d48 PP |
900 | |
901 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
902 | |
903 | Uses a fairly simplistic heuristic approach where we check | |
904 | the file name against "/libpthread". This can lead to false | |
e2b9ea4b KB |
905 | positives, but this should be good enough in practice. |
906 | ||
907 | As of glibc-2.34, functions formerly residing in libpthread have | |
908 | been moved to libc, so "/libc." needs to be checked too. (Matching | |
909 | the "." will avoid matching libraries such as libcrypt.) */ | |
6612ad7f | 910 | |
5b89c67a | 911 | bool |
17a37d48 PP |
912 | libpthread_name_p (const char *name) |
913 | { | |
e2b9ea4b KB |
914 | return (strstr (name, "/libpthread") != NULL |
915 | || strstr (name, "/libc.") != NULL ); | |
17a37d48 PP |
916 | } |
917 | ||
918 | /* Return non-zero if SO is the libpthread shared library. */ | |
919 | ||
5b89c67a | 920 | static bool |
6612ad7f JB |
921 | libpthread_solib_p (struct so_list *so) |
922 | { | |
17a37d48 | 923 | return libpthread_name_p (so->so_name); |
6612ad7f | 924 | } |
105b175f | 925 | |
7f86f058 | 926 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
927 | match PATTERN. (If we've already read a shared object's symbol |
928 | info, leave it alone.) If PATTERN is zero, read them all. | |
929 | ||
990f9fe3 FF |
930 | If READSYMS is 0, defer reading symbolic information until later |
931 | but still do any needed low level processing. | |
932 | ||
e696b3ad | 933 | FROM_TTY is described for update_solib_list, above. */ |
105b175f JB |
934 | |
935 | void | |
e696b3ad | 936 | solib_add (const char *pattern, int from_tty, int readsyms) |
105b175f | 937 | { |
770e7fc7 DE |
938 | if (print_symbol_loading_p (from_tty, 0, 0)) |
939 | { | |
940 | if (pattern != NULL) | |
941 | { | |
942 | printf_unfiltered (_("Loading symbols for shared libraries: %s\n"), | |
943 | pattern); | |
944 | } | |
945 | else | |
946 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
947 | } | |
948 | ||
2eff07b3 PP |
949 | current_program_space->solib_add_generation++; |
950 | ||
105b175f JB |
951 | if (pattern) |
952 | { | |
953 | char *re_err = re_comp (pattern); | |
954 | ||
955 | if (re_err) | |
8a3fe4f8 | 956 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
957 | } |
958 | ||
e696b3ad | 959 | update_solib_list (from_tty); |
c906108c | 960 | |
105b175f JB |
961 | /* Walk the list of currently loaded shared libraries, and read |
962 | symbols for any that match the pattern --- or any whose symbols | |
963 | aren't already loaded, if no pattern was given. */ | |
e8930304 | 964 | { |
5b89c67a CB |
965 | bool any_matches = false; |
966 | bool loaded_any_symbols = false; | |
b15cc25c PA |
967 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
968 | ||
969 | if (from_tty) | |
dda83cd7 | 970 | add_flags |= SYMFILE_VERBOSE; |
c906108c | 971 | |
a1fd1ac9 | 972 | for (struct so_list *gdb : current_program_space->solibs ()) |
e8930304 JB |
973 | if (! pattern || re_exec (gdb->so_name)) |
974 | { | |
dda83cd7 SM |
975 | /* Normally, we would read the symbols from that library |
976 | only if READSYMS is set. However, we're making a small | |
977 | exception for the pthread library, because we sometimes | |
978 | need the library symbols to be loaded in order to provide | |
979 | thread support (x86-linux for instance). */ | |
980 | const int add_this_solib = | |
981 | (readsyms || libpthread_solib_p (gdb)); | |
6612ad7f | 982 | |
5b89c67a | 983 | any_matches = true; |
a86988f2 PA |
984 | if (add_this_solib) |
985 | { | |
986 | if (gdb->symbols_loaded) | |
987 | { | |
988 | /* If no pattern was given, be quiet for shared | |
989 | libraries we have already loaded. */ | |
990 | if (pattern && (from_tty || info_verbose)) | |
991 | printf_unfiltered (_("Symbols already loaded for %s\n"), | |
992 | gdb->so_name); | |
993 | } | |
b15cc25c | 994 | else if (solib_read_symbols (gdb, add_flags)) |
5b89c67a | 995 | loaded_any_symbols = true; |
a86988f2 | 996 | } |
e8930304 JB |
997 | } |
998 | ||
7eedccfa PP |
999 | if (loaded_any_symbols) |
1000 | breakpoint_re_set (); | |
1001 | ||
e8930304 JB |
1002 | if (from_tty && pattern && ! any_matches) |
1003 | printf_unfiltered | |
1004 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1005 | ||
1006 | if (loaded_any_symbols) | |
1007 | { | |
1008 | /* Getting new symbols may change our opinion about what is | |
1009 | frameless. */ | |
1010 | reinit_frame_cache (); | |
e8930304 JB |
1011 | } |
1012 | } | |
c906108c SS |
1013 | } |
1014 | ||
7f86f058 PA |
1015 | /* Implement the "info sharedlibrary" command. Walk through the |
1016 | shared library list and print information about each attached | |
1017 | library matching PATTERN. If PATTERN is elided, print them | |
1018 | all. */ | |
c906108c SS |
1019 | |
1020 | static void | |
1d12d88f | 1021 | info_sharedlibrary_command (const char *pattern, int from_tty) |
c906108c | 1022 | { |
5b89c67a | 1023 | bool so_missing_debug_info = false; |
c906108c | 1024 | int addr_width; |
55333a84 | 1025 | int nr_libs; |
f5656ead | 1026 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1027 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1028 | |
1029 | if (pattern) | |
1030 | { | |
1031 | char *re_err = re_comp (pattern); | |
1032 | ||
1033 | if (re_err) | |
1034 | error (_("Invalid regexp: %s"), re_err); | |
1035 | } | |
c906108c | 1036 | |
84eb3c4f | 1037 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1038 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1039 | |
e696b3ad | 1040 | update_solib_list (from_tty); |
07cd4b97 | 1041 | |
4a2b031d TT |
1042 | /* ui_out_emit_table table_emitter needs to know the number of rows, |
1043 | so we need to make two passes over the libs. */ | |
55333a84 | 1044 | |
a1fd1ac9 TT |
1045 | nr_libs = 0; |
1046 | for (struct so_list *so : current_program_space->solibs ()) | |
c906108c | 1047 | { |
c5aa993b | 1048 | if (so->so_name[0]) |
c906108c | 1049 | { |
55333a84 DE |
1050 | if (pattern && ! re_exec (so->so_name)) |
1051 | continue; | |
1052 | ++nr_libs; | |
1053 | } | |
1054 | } | |
1055 | ||
4a2b031d TT |
1056 | { |
1057 | ui_out_emit_table table_emitter (uiout, 4, nr_libs, "SharedLibraryTable"); | |
55333a84 | 1058 | |
4a2b031d TT |
1059 | /* The "- 1" is because ui_out adds one space between columns. */ |
1060 | uiout->table_header (addr_width - 1, ui_left, "from", "From"); | |
1061 | uiout->table_header (addr_width - 1, ui_left, "to", "To"); | |
1062 | uiout->table_header (12 - 1, ui_left, "syms-read", "Syms Read"); | |
1063 | uiout->table_header (0, ui_noalign, "name", "Shared Object Library"); | |
55333a84 | 1064 | |
4a2b031d | 1065 | uiout->table_body (); |
55333a84 | 1066 | |
a1fd1ac9 | 1067 | for (struct so_list *so : current_program_space->solibs ()) |
4a2b031d TT |
1068 | { |
1069 | if (! so->so_name[0]) | |
1070 | continue; | |
1071 | if (pattern && ! re_exec (so->so_name)) | |
1072 | continue; | |
1073 | ||
1074 | ui_out_emit_tuple tuple_emitter (uiout, "lib"); | |
1075 | ||
1076 | if (so->addr_high != 0) | |
1077 | { | |
1078 | uiout->field_core_addr ("from", gdbarch, so->addr_low); | |
1079 | uiout->field_core_addr ("to", gdbarch, so->addr_high); | |
1080 | } | |
1081 | else | |
1082 | { | |
1083 | uiout->field_skip ("from"); | |
1084 | uiout->field_skip ("to"); | |
1085 | } | |
1086 | ||
29f94340 | 1087 | if (! top_level_interpreter ()->interp_ui_out ()->is_mi_like_p () |
4a2b031d TT |
1088 | && so->symbols_loaded |
1089 | && !objfile_has_symbols (so->objfile)) | |
1090 | { | |
5b89c67a | 1091 | so_missing_debug_info = true; |
4a2b031d TT |
1092 | uiout->field_string ("syms-read", "Yes (*)"); |
1093 | } | |
1094 | else | |
1095 | uiout->field_string ("syms-read", so->symbols_loaded ? "Yes" : "No"); | |
1096 | ||
e43b10e1 | 1097 | uiout->field_string ("name", so->so_name, file_name_style.style ()); |
4a2b031d TT |
1098 | |
1099 | uiout->text ("\n"); | |
1100 | } | |
1101 | } | |
55333a84 DE |
1102 | |
1103 | if (nr_libs == 0) | |
1104 | { | |
1105 | if (pattern) | |
112e8700 | 1106 | uiout->message (_("No shared libraries matched.\n")); |
55333a84 | 1107 | else |
112e8700 | 1108 | uiout->message (_("No shared libraries loaded at this time.\n")); |
55333a84 DE |
1109 | } |
1110 | else | |
c906108c | 1111 | { |
55333a84 | 1112 | if (so_missing_debug_info) |
112e8700 | 1113 | uiout->message (_("(*): Shared library is missing " |
3e43a32a | 1114 | "debugging information.\n")); |
c906108c SS |
1115 | } |
1116 | } | |
1117 | ||
5b89c67a | 1118 | /* See solib.h. */ |
5fd1a349 | 1119 | |
5b89c67a | 1120 | bool |
5fd1a349 PP |
1121 | solib_contains_address_p (const struct so_list *const solib, |
1122 | CORE_ADDR address) | |
1123 | { | |
76547ab3 TV |
1124 | if (solib->sections == nullptr) |
1125 | return false; | |
1126 | ||
d7a78e5c | 1127 | for (target_section &p : *solib->sections) |
bb2a6777 | 1128 | if (p.addr <= address && address < p.endaddr) |
5b89c67a | 1129 | return true; |
5fd1a349 | 1130 | |
5b89c67a | 1131 | return false; |
5fd1a349 PP |
1132 | } |
1133 | ||
7f86f058 PA |
1134 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1135 | name. | |
c906108c | 1136 | |
7f86f058 PA |
1137 | Provides a hook for other gdb routines to discover whether or not a |
1138 | particular address is within the mapped address space of a shared | |
1139 | library. | |
c906108c | 1140 | |
c5aa993b JM |
1141 | For example, this routine is called at one point to disable |
1142 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1143 | mapped in. */ |
c906108c SS |
1144 | |
1145 | char * | |
6c95b8df | 1146 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1147 | { |
6c95b8df | 1148 | struct so_list *so = NULL; |
c5aa993b | 1149 | |
6c95b8df | 1150 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1151 | if (solib_contains_address_p (so, address)) |
1152 | return (so->so_name); | |
07cd4b97 | 1153 | |
c906108c SS |
1154 | return (0); |
1155 | } | |
1156 | ||
5b89c67a | 1157 | /* See solib.h. */ |
de18c1d8 | 1158 | |
5b89c67a | 1159 | bool |
de18c1d8 JM |
1160 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) |
1161 | { | |
3641da11 | 1162 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
de18c1d8 JM |
1163 | |
1164 | if (ops->keep_data_in_core) | |
5b89c67a | 1165 | return ops->keep_data_in_core (vaddr, size) != 0; |
de18c1d8 | 1166 | else |
5b89c67a | 1167 | return false; |
de18c1d8 JM |
1168 | } |
1169 | ||
c906108c SS |
1170 | /* Called by free_all_symtabs */ |
1171 | ||
c5aa993b | 1172 | void |
fba45db2 | 1173 | clear_solib (void) |
c906108c | 1174 | { |
3641da11 | 1175 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1176 | |
1736a7bd | 1177 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1178 | |
a1fd1ac9 | 1179 | while (current_program_space->so_list) |
c906108c | 1180 | { |
a1fd1ac9 | 1181 | struct so_list *so = current_program_space->so_list; |
433759f7 | 1182 | |
a1fd1ac9 | 1183 | current_program_space->so_list = so->next; |
76727919 | 1184 | gdb::observers::solib_unloaded.notify (so); |
2a3f84af | 1185 | current_program_space->remove_target_sections (so); |
07cd4b97 | 1186 | free_so (so); |
c906108c | 1187 | } |
07cd4b97 | 1188 | |
66aba65d | 1189 | ops->clear_solib (); |
c906108c SS |
1190 | } |
1191 | ||
7f86f058 PA |
1192 | /* Shared library startup support. When GDB starts up the inferior, |
1193 | it nurses it along (through the shell) until it is ready to execute | |
1194 | its first instruction. At this point, this function gets | |
1195 | called. */ | |
c5aa993b JM |
1196 | |
1197 | void | |
268a4a75 | 1198 | solib_create_inferior_hook (int from_tty) |
c906108c | 1199 | { |
3641da11 | 1200 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1201 | |
268a4a75 | 1202 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1203 | } |
1204 | ||
5b89c67a | 1205 | /* See solib.h. */ |
d7fa2ae2 | 1206 | |
5b89c67a | 1207 | bool |
d7fa2ae2 KB |
1208 | in_solib_dynsym_resolve_code (CORE_ADDR pc) |
1209 | { | |
3641da11 | 1210 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1211 | |
5b89c67a | 1212 | return ops->in_dynsym_resolve_code (pc) != 0; |
d7fa2ae2 | 1213 | } |
c906108c | 1214 | |
7f86f058 | 1215 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1216 | |
1217 | static void | |
0b39b52e | 1218 | sharedlibrary_command (const char *args, int from_tty) |
c906108c SS |
1219 | { |
1220 | dont_repeat (); | |
e696b3ad | 1221 | solib_add (args, from_tty, 1); |
c906108c SS |
1222 | } |
1223 | ||
7f86f058 | 1224 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1225 | that have been auto-loaded from shared libraries. Symbols from |
1226 | shared libraries that were added by explicit request of the user | |
1227 | are not discarded. Also called from remote.c. */ | |
1228 | ||
c60a7562 | 1229 | void |
0b39b52e | 1230 | no_shared_libraries (const char *ignored, int from_tty) |
c60a7562 | 1231 | { |
a3247a22 PP |
1232 | /* The order of the two routines below is important: clear_solib notifies |
1233 | the solib_unloaded observers, and some of these observers might need | |
1234 | access to their associated objfiles. Therefore, we can not purge the | |
1235 | solibs' objfiles before clear_solib has been called. */ | |
1236 | ||
615b9dba | 1237 | clear_solib (); |
a3247a22 | 1238 | objfile_purge_solibs (); |
c60a7562 | 1239 | } |
c906108c | 1240 | |
f9e14852 GB |
1241 | /* See solib.h. */ |
1242 | ||
1243 | void | |
1244 | update_solib_breakpoints (void) | |
1245 | { | |
1246 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1247 | ||
1248 | if (ops->update_breakpoints != NULL) | |
1249 | ops->update_breakpoints (); | |
1250 | } | |
1251 | ||
1252 | /* See solib.h. */ | |
1253 | ||
1254 | void | |
1255 | handle_solib_event (void) | |
1256 | { | |
1257 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1258 | ||
1259 | if (ops->handle_event != NULL) | |
1260 | ops->handle_event (); | |
1261 | ||
e39fb971 | 1262 | current_inferior ()->pspace->clear_solib_cache (); |
f9e14852 GB |
1263 | |
1264 | /* Check for any newly added shared libraries if we're supposed to | |
1265 | be adding them automatically. Switch terminal for any messages | |
1266 | produced by breakpoint_re_set. */ | |
223ffa71 | 1267 | target_terminal::ours_for_output (); |
e696b3ad | 1268 | solib_add (NULL, 0, auto_solib_add); |
223ffa71 | 1269 | target_terminal::inferior (); |
f9e14852 GB |
1270 | } |
1271 | ||
a86988f2 PA |
1272 | /* Reload shared libraries, but avoid reloading the same symbol file |
1273 | we already have loaded. */ | |
1274 | ||
1275 | static void | |
1276 | reload_shared_libraries_1 (int from_tty) | |
1277 | { | |
770e7fc7 DE |
1278 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1279 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1280 | ||
a1fd1ac9 | 1281 | for (struct so_list *so : current_program_space->solibs ()) |
a86988f2 | 1282 | { |
b16c44de | 1283 | const char *found_pathname = NULL; |
5b89c67a | 1284 | bool was_loaded = so->symbols_loaded != 0; |
b15cc25c PA |
1285 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1286 | ||
1287 | if (from_tty) | |
1288 | add_flags |= SYMFILE_VERBOSE; | |
a86988f2 | 1289 | |
ee0c3293 TT |
1290 | gdb::unique_xmalloc_ptr<char> filename |
1291 | (tilde_expand (so->so_original_name)); | |
1292 | gdb_bfd_ref_ptr abfd (solib_bfd_open (filename.get ())); | |
a86988f2 | 1293 | if (abfd != NULL) |
ee0c3293 | 1294 | found_pathname = bfd_get_filename (abfd.get ()); |
a86988f2 PA |
1295 | |
1296 | /* If this shared library is no longer associated with its previous | |
1297 | symbol file, close that. */ | |
1298 | if ((found_pathname == NULL && was_loaded) | |
1299 | || (found_pathname != NULL | |
0ba1096a | 1300 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1301 | { |
59145f8c AR |
1302 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1303 | && !solib_used (so)) | |
268e4f09 | 1304 | so->objfile->unlink (); |
2a3f84af | 1305 | current_program_space->remove_target_sections (so); |
0892cb63 | 1306 | clear_so (so); |
a86988f2 PA |
1307 | } |
1308 | ||
1309 | /* If this shared library is now associated with a new symbol | |
1310 | file, open it. */ | |
1311 | if (found_pathname != NULL | |
1312 | && (!was_loaded | |
0ba1096a | 1313 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1314 | { |
5b89c67a | 1315 | bool got_error = false; |
a86988f2 | 1316 | |
a70b8144 | 1317 | try |
492d29ea PA |
1318 | { |
1319 | solib_map_sections (so); | |
1320 | } | |
1321 | ||
230d2906 | 1322 | catch (const gdb_exception_error &e) |
492d29ea PA |
1323 | { |
1324 | exception_fprintf (gdb_stderr, e, | |
1325 | _("Error while mapping " | |
1326 | "shared library sections:\n")); | |
5b89c67a | 1327 | got_error = true; |
492d29ea | 1328 | } |
a86988f2 | 1329 | |
492d29ea PA |
1330 | if (!got_error |
1331 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
b15cc25c | 1332 | solib_read_symbols (so, add_flags); |
a86988f2 PA |
1333 | } |
1334 | } | |
a86988f2 PA |
1335 | } |
1336 | ||
cf466558 | 1337 | static void |
eb4c3f4a | 1338 | reload_shared_libraries (const char *ignored, int from_tty, |
f397e303 | 1339 | struct cmd_list_element *e) |
cf466558 | 1340 | { |
3641da11 | 1341 | const struct target_so_ops *ops; |
a86988f2 PA |
1342 | |
1343 | reload_shared_libraries_1 (from_tty); | |
1344 | ||
f5656ead | 1345 | ops = solib_ops (target_gdbarch ()); |
a86988f2 | 1346 | |
c378eb4e | 1347 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1348 | shared libraries then the address of solib breakpoint we've computed |
1349 | previously might be no longer valid. For example, if we forgot to set | |
1350 | solib-absolute-prefix and are setting it right now, then the previous | |
1351 | breakpoint address is plain wrong. Second, installing solib hooks | |
1352 | also implicitly figures were ld.so is and loads symbols for it. | |
1353 | Absent this call, if we've just connected to a target and set | |
1354 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1355 | about ld.so. */ | |
55f6301a | 1356 | if (target_has_execution ()) |
c8fa6cdd | 1357 | { |
a86988f2 PA |
1358 | /* Reset or free private data structures not associated with |
1359 | so_list entries. */ | |
1360 | ops->clear_solib (); | |
1361 | ||
1362 | /* Remove any previous solib event breakpoint. This is usually | |
1363 | done in common code, at breakpoint_init_inferior time, but | |
1364 | we're not really starting up the inferior here. */ | |
1365 | remove_solib_event_breakpoints (); | |
1366 | ||
268a4a75 | 1367 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1368 | } |
268a4a75 JK |
1369 | |
1370 | /* Sometimes the platform-specific hook loads initial shared | |
1371 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1372 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1373 | made all the inferior hook methods consistent, this call could be | |
1374 | removed. Call it only after the solib target has been initialized by | |
1375 | solib_create_inferior_hook. */ | |
1376 | ||
e696b3ad | 1377 | solib_add (NULL, 0, auto_solib_add); |
268a4a75 | 1378 | |
a86988f2 PA |
1379 | breakpoint_re_set (); |
1380 | ||
1381 | /* We may have loaded or unloaded debug info for some (or all) | |
1382 | shared libraries. However, frames may still reference them. For | |
1383 | example, a frame's unwinder might still point at DWARF FDE | |
1384 | structures that are now freed. Also, getting new symbols may | |
1385 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1386 | reinit_frame_cache (); |
cf466558 KB |
1387 | } |
1388 | ||
2938e6cf GB |
1389 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1390 | at the start of gdb_sysroot with "target:". */ | |
1391 | ||
1392 | static void | |
eb4c3f4a | 1393 | gdb_sysroot_changed (const char *ignored, int from_tty, |
2938e6cf GB |
1394 | struct cmd_list_element *e) |
1395 | { | |
1396 | const char *old_prefix = "remote:"; | |
1397 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1398 | ||
1399 | if (startswith (gdb_sysroot, old_prefix)) | |
1400 | { | |
5b89c67a | 1401 | static bool warning_issued = false; |
2938e6cf GB |
1402 | |
1403 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
1404 | memcpy (gdb_sysroot, new_prefix, strlen (new_prefix)); | |
1405 | ||
1406 | if (!warning_issued) | |
1407 | { | |
1408 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1409 | old_prefix, new_prefix); | |
1410 | warning (_("sysroot set to \"%s\"."), gdb_sysroot); | |
1411 | ||
5b89c67a | 1412 | warning_issued = true; |
2938e6cf GB |
1413 | } |
1414 | } | |
1415 | ||
1416 | reload_shared_libraries (ignored, from_tty, e); | |
1417 | } | |
1418 | ||
920d2a44 AC |
1419 | static void |
1420 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1421 | struct cmd_list_element *c, const char *value) | |
1422 | { | |
1423 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1424 | value); | |
1425 | } | |
1426 | ||
1427 | ||
cb457ae2 YQ |
1428 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1429 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1430 | whether to pick up a symbol. DATA is the input of this callback | |
1431 | function. Return NULL if symbol is not found. */ | |
1432 | ||
1433 | CORE_ADDR | |
1434 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
3953f15c SM |
1435 | int (*match_sym) (const asymbol *, |
1436 | const void *), | |
1437 | const void *data) | |
cb457ae2 YQ |
1438 | { |
1439 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1440 | CORE_ADDR symaddr = 0; | |
1441 | ||
1442 | if (storage_needed > 0) | |
1443 | { | |
1444 | unsigned int i; | |
1445 | ||
1cb1f3da TT |
1446 | gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *)); |
1447 | asymbol **symbol_table = storage.data (); | |
cb457ae2 YQ |
1448 | unsigned int number_of_symbols = |
1449 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1450 | ||
1451 | for (i = 0; i < number_of_symbols; i++) | |
1452 | { | |
1453 | asymbol *sym = *symbol_table++; | |
1454 | ||
1455 | if (match_sym (sym, data)) | |
1456 | { | |
3e29f34a MR |
1457 | struct gdbarch *gdbarch = target_gdbarch (); |
1458 | symaddr = sym->value; | |
1459 | ||
1460 | /* Some ELF targets fiddle with addresses of symbols they | |
dda83cd7 SM |
1461 | consider special. They use minimal symbols to do that |
1462 | and this is needed for correct breakpoint placement, | |
1463 | but we do not have full data here to build a complete | |
1464 | minimal symbol, so just set the address and let the | |
1465 | targets cope with that. */ | |
3e29f34a MR |
1466 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
1467 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1468 | { | |
eefba3da | 1469 | struct minimal_symbol msym {}; |
3e29f34a | 1470 | |
3e29f34a MR |
1471 | SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr); |
1472 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); | |
1473 | symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym); | |
1474 | } | |
1475 | ||
cb457ae2 | 1476 | /* BFD symbols are section relative. */ |
3e29f34a | 1477 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1478 | break; |
1479 | } | |
1480 | } | |
cb457ae2 YQ |
1481 | } |
1482 | ||
1483 | return symaddr; | |
1484 | } | |
1485 | ||
8ddf4645 AM |
1486 | /* See solib.h. */ |
1487 | ||
1488 | int | |
1489 | gdb_bfd_scan_elf_dyntag (const int desired_dyntag, bfd *abfd, CORE_ADDR *ptr, | |
1490 | CORE_ADDR *ptr_addr) | |
1491 | { | |
1492 | int arch_size, step, sect_size; | |
1493 | long current_dyntag; | |
1494 | CORE_ADDR dyn_ptr, dyn_addr; | |
1495 | gdb_byte *bufend, *bufstart, *buf; | |
1496 | Elf32_External_Dyn *x_dynp_32; | |
1497 | Elf64_External_Dyn *x_dynp_64; | |
1498 | struct bfd_section *sect; | |
1499 | ||
1500 | if (abfd == NULL) | |
1501 | return 0; | |
1502 | ||
1503 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
1504 | return 0; | |
1505 | ||
1506 | arch_size = bfd_get_arch_size (abfd); | |
1507 | if (arch_size == -1) | |
1508 | return 0; | |
1509 | ||
1510 | /* Find the start address of the .dynamic section. */ | |
1511 | sect = bfd_get_section_by_name (abfd, ".dynamic"); | |
1512 | if (sect == NULL) | |
1513 | return 0; | |
1514 | ||
1515 | bool found = false; | |
1516 | for (const target_section &target_section | |
1517 | : current_program_space->target_sections ()) | |
1518 | if (sect == target_section.the_bfd_section) | |
1519 | { | |
1520 | dyn_addr = target_section.addr; | |
1521 | found = true; | |
1522 | break; | |
1523 | } | |
1524 | if (!found) | |
1525 | { | |
1526 | /* ABFD may come from OBJFILE acting only as a symbol file without being | |
1527 | loaded into the target (see add_symbol_file_command). This case is | |
1528 | such fallback to the file VMA address without the possibility of | |
1529 | having the section relocated to its actual in-memory address. */ | |
1530 | ||
1531 | dyn_addr = bfd_section_vma (sect); | |
1532 | } | |
1533 | ||
1534 | /* Read in .dynamic from the BFD. We will get the actual value | |
1535 | from memory later. */ | |
1536 | sect_size = bfd_section_size (sect); | |
1537 | buf = bufstart = (gdb_byte *) alloca (sect_size); | |
1538 | if (!bfd_get_section_contents (abfd, sect, | |
1539 | buf, 0, sect_size)) | |
1540 | return 0; | |
1541 | ||
1542 | /* Iterate over BUF and scan for DYNTAG. If found, set PTR and return. */ | |
1543 | step = (arch_size == 32) ? sizeof (Elf32_External_Dyn) | |
1544 | : sizeof (Elf64_External_Dyn); | |
1545 | for (bufend = buf + sect_size; | |
1546 | buf < bufend; | |
1547 | buf += step) | |
1548 | { | |
1549 | if (arch_size == 32) | |
1550 | { | |
1551 | x_dynp_32 = (Elf32_External_Dyn *) buf; | |
1552 | current_dyntag = bfd_h_get_32 (abfd, (bfd_byte *) x_dynp_32->d_tag); | |
1553 | dyn_ptr = bfd_h_get_32 (abfd, (bfd_byte *) x_dynp_32->d_un.d_ptr); | |
1554 | } | |
1555 | else | |
1556 | { | |
1557 | x_dynp_64 = (Elf64_External_Dyn *) buf; | |
1558 | current_dyntag = bfd_h_get_64 (abfd, (bfd_byte *) x_dynp_64->d_tag); | |
1559 | dyn_ptr = bfd_h_get_64 (abfd, (bfd_byte *) x_dynp_64->d_un.d_ptr); | |
1560 | } | |
1561 | if (current_dyntag == DT_NULL) | |
1562 | return 0; | |
1563 | if (current_dyntag == desired_dyntag) | |
1564 | { | |
1565 | /* If requested, try to read the runtime value of this .dynamic | |
1566 | entry. */ | |
1567 | if (ptr) | |
1568 | { | |
1569 | struct type *ptr_type; | |
1570 | gdb_byte ptr_buf[8]; | |
1571 | CORE_ADDR ptr_addr_1; | |
1572 | ||
1573 | ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
1574 | ptr_addr_1 = dyn_addr + (buf - bufstart) + arch_size / 8; | |
1575 | if (target_read_memory (ptr_addr_1, ptr_buf, arch_size / 8) == 0) | |
1576 | dyn_ptr = extract_typed_address (ptr_buf, ptr_type); | |
1577 | *ptr = dyn_ptr; | |
1578 | if (ptr_addr) | |
1579 | *ptr_addr = dyn_addr + (buf - bufstart); | |
1580 | } | |
1581 | return 1; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | return 0; | |
1586 | } | |
1587 | ||
cb457ae2 YQ |
1588 | /* Lookup the value for a specific symbol from symbol table. Look up symbol |
1589 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1590 | up a symbol. DATA is the input of this callback function. Return NULL | |
1591 | if symbol is not found. */ | |
1592 | ||
1593 | static CORE_ADDR | |
1594 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
3953f15c SM |
1595 | int (*match_sym) (const asymbol *, |
1596 | const void *), | |
1597 | const void *data) | |
cb457ae2 YQ |
1598 | { |
1599 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1600 | CORE_ADDR symaddr = 0; | |
1601 | ||
1602 | if (storage_needed > 0) | |
1603 | { | |
1604 | unsigned int i; | |
1cb1f3da TT |
1605 | gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *)); |
1606 | asymbol **symbol_table = storage.data (); | |
cb457ae2 YQ |
1607 | unsigned int number_of_symbols = |
1608 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1609 | ||
1610 | for (i = 0; i < number_of_symbols; i++) | |
1611 | { | |
1612 | asymbol *sym = *symbol_table++; | |
1613 | ||
1614 | if (match_sym (sym, data)) | |
1615 | { | |
1616 | /* BFD symbols are section relative. */ | |
1617 | symaddr = sym->value + sym->section->vma; | |
1618 | break; | |
1619 | } | |
1620 | } | |
cb457ae2 YQ |
1621 | } |
1622 | return symaddr; | |
1623 | } | |
1624 | ||
1625 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1626 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1627 | function to determine whether to pick up a symbol. DATA is the | |
1628 | input of this callback function. Return NULL if symbol is not | |
1629 | found. */ | |
1630 | ||
1631 | CORE_ADDR | |
1632 | gdb_bfd_lookup_symbol (bfd *abfd, | |
3953f15c SM |
1633 | int (*match_sym) (const asymbol *, const void *), |
1634 | const void *data) | |
cb457ae2 YQ |
1635 | { |
1636 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1637 | ||
1638 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1639 | have to check the dynamic string table too. */ | |
1640 | if (symaddr == 0) | |
1641 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1642 | ||
1643 | return symaddr; | |
1644 | } | |
3a40aaa0 | 1645 | |
a1fd1ac9 TT |
1646 | /* The shared library list may contain user-loaded object files that |
1647 | can be removed out-of-band by the user. So upon notification of | |
1648 | free_objfile remove all references to any user-loaded file that is | |
1649 | about to be freed. */ | |
63644780 NB |
1650 | |
1651 | static void | |
1652 | remove_user_added_objfile (struct objfile *objfile) | |
1653 | { | |
63644780 NB |
1654 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) |
1655 | { | |
a1fd1ac9 | 1656 | for (struct so_list *so : current_program_space->solibs ()) |
63644780 NB |
1657 | if (so->objfile == objfile) |
1658 | so->objfile = NULL; | |
1659 | } | |
1660 | } | |
1661 | ||
6c265988 | 1662 | void _initialize_solib (); |
c906108c | 1663 | void |
6c265988 | 1664 | _initialize_solib () |
c906108c | 1665 | { |
66aba65d MK |
1666 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1667 | ||
c90e7d63 SM |
1668 | gdb::observers::free_objfile.attach (remove_user_added_objfile, |
1669 | "solib"); | |
42a4fec5 SM |
1670 | gdb::observers::inferior_execd.attach ([] (inferior *inf) |
1671 | { | |
1672 | solib_create_inferior_hook (0); | |
c90e7d63 | 1673 | }, "solib"); |
63644780 | 1674 | |
c906108c | 1675 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1676 | _("Load shared object library symbols for files matching REGEXP.")); |
e0f25bd9 SM |
1677 | cmd_list_element *info_sharedlibrary_cmd |
1678 | = add_info ("sharedlibrary", info_sharedlibrary_command, | |
1679 | _("Status of loaded shared object libraries.")); | |
1680 | add_info_alias ("dll", info_sharedlibrary_cmd, 1); | |
c60a7562 | 1681 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1682 | _("Unload all shared object library symbols.")); |
c906108c | 1683 | |
5bf193a2 AC |
1684 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1685 | &auto_solib_add, _("\ | |
1686 | Set autoloading of shared library symbols."), _("\ | |
1687 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1688 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1689 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1690 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1691 | inferior. Otherwise, symbols must be loaded manually, using \ |
1692 | `sharedlibrary'."), | |
5bf193a2 | 1693 | NULL, |
920d2a44 | 1694 | show_auto_solib_add, |
5bf193a2 | 1695 | &setlist, &showlist); |
c906108c | 1696 | |
5e84b7ee SM |
1697 | set_show_commands sysroot_cmds |
1698 | = add_setshow_optional_filename_cmd ("sysroot", class_support, | |
1699 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1700 | Set an alternate system root."), _("\ |
1701 | Show the current system root."), _("\ | |
1702 | The system root is used to load absolute shared library symbol files.\n\ | |
1703 | For other (relative) files, you can add directories using\n\ | |
1704 | `set solib-search-path'."), | |
5e84b7ee SM |
1705 | gdb_sysroot_changed, |
1706 | NULL, | |
1707 | &setlist, &showlist); | |
c906108c | 1708 | |
5e84b7ee | 1709 | add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.set, class_support, 0, |
f822c95b | 1710 | &setlist); |
5e84b7ee | 1711 | add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.show, class_support, 0, |
f822c95b | 1712 | &showlist); |
030292b7 | 1713 | |
525226b5 AC |
1714 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1715 | &solib_search_path, _("\ | |
3e43a32a MS |
1716 | Set the search path for loading non-absolute shared library symbol files."), |
1717 | _("\ | |
1718 | Show the search path for loading non-absolute shared library symbol files."), | |
1719 | _("\ | |
1720 | This takes precedence over the environment variables \ | |
1721 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1722 | reload_shared_libraries, |
920d2a44 | 1723 | show_solib_search_path, |
525226b5 | 1724 | &setlist, &showlist); |
c906108c | 1725 | } |