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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
4a94e368 | 3 | Copyright (C) 1990-2022 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" | |
39f53acb | 26 | #include "build-id.h" |
c906108c SS |
27 | #include "symfile.h" |
28 | #include "objfiles.h" | |
29 | #include "gdbcore.h" | |
30 | #include "command.h" | |
31 | #include "target.h" | |
32 | #include "frame.h" | |
d322d6d6 | 33 | #include "gdbsupport/gdb_regex.h" |
c906108c | 34 | #include "inferior.h" |
268a13a5 | 35 | #include "gdbsupport/environ.h" |
c906108c SS |
36 | #include "language.h" |
37 | #include "gdbcmd.h" | |
fa58ee11 | 38 | #include "completer.h" |
8ddf4645 AM |
39 | #include "elf/external.h" |
40 | #include "elf/common.h" | |
fe4e3eb8 | 41 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 42 | #include "exec.h" |
13437d4b | 43 | #include "solist.h" |
76727919 | 44 | #include "observable.h" |
e0eac551 | 45 | #include "readline/tilde.h" |
f1838a98 | 46 | #include "remote.h" |
2c0b251b | 47 | #include "solib.h" |
55333a84 | 48 | #include "interps.h" |
ab38a727 | 49 | #include "filesystem.h" |
cbb099e8 | 50 | #include "gdb_bfd.h" |
268a13a5 | 51 | #include "gdbsupport/filestuff.h" |
b91f93a0 AM |
52 | #include "gdbsupport/scoped_fd.h" |
53 | #include "debuginfod-support.h" | |
b46a8d7c | 54 | #include "source.h" |
e43b10e1 | 55 | #include "cli/cli-style.h" |
5898c79a | 56 | #include "solib-target.h" |
c906108c | 57 | |
e26d0dab | 58 | /* See solib.h. */ |
c906108c | 59 | |
e26d0dab | 60 | bool debug_solib; |
c906108c | 61 | |
c906108c SS |
62 | /* If non-empty, this is a search path for loading non-absolute shared library |
63 | symbol files. This takes precedence over the environment variables PATH | |
64 | and LD_LIBRARY_PATH. */ | |
e0700ba4 | 65 | static std::string solib_search_path; |
920d2a44 AC |
66 | static void |
67 | show_solib_search_path (struct ui_file *file, int from_tty, | |
68 | struct cmd_list_element *c, const char *value) | |
69 | { | |
6cb06a8c TT |
70 | gdb_printf (file, _("The search path for loading non-absolute " |
71 | "shared library symbol files is %s.\n"), | |
72 | value); | |
920d2a44 | 73 | } |
c906108c | 74 | |
ab38a727 PA |
75 | /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */ |
76 | #if (HAVE_DOS_BASED_FILE_SYSTEM) | |
77 | # define DOS_BASED_FILE_SYSTEM 1 | |
78 | #else | |
79 | # define DOS_BASED_FILE_SYSTEM 0 | |
80 | #endif | |
81 | ||
797bc1cb TT |
82 | /* Return the full pathname of a binary file (the main executable or a |
83 | shared library file), or NULL if not found. If FD is non-NULL, *FD | |
84 | is set to either -1 or an open file handle for the binary file. | |
e4f7b8c8 | 85 | |
f822c95b | 86 | Global variable GDB_SYSROOT is used as a prefix directory |
af1900b0 | 87 | to search for binary files if they have an absolute path. |
b57fbfba GB |
88 | If GDB_SYSROOT starts with "target:" and target filesystem |
89 | is the local filesystem then the "target:" prefix will be | |
90 | stripped before the search starts. This ensures that the | |
91 | same search algorithm is used for local files regardless of | |
92 | whether a "target:" prefix was used. | |
e4f7b8c8 MS |
93 | |
94 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
95 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
b57fbfba | 96 | shared libraries if not found in either the sysroot (if set) or |
af1900b0 GB |
97 | the local filesystem. SOLIB_SEARCH_PATH is not used when searching |
98 | for the main executable. | |
e4f7b8c8 | 99 | |
c8c18e65 | 100 | Search algorithm: |
b57fbfba GB |
101 | * If a sysroot is set and path is absolute: |
102 | * Search for sysroot/path. | |
c8c18e65 KW |
103 | * else |
104 | * Look for it literally (unmodified). | |
af1900b0 GB |
105 | * If IS_SOLIB is non-zero: |
106 | * Look in SOLIB_SEARCH_PATH. | |
107 | * If available, use target defined search function. | |
b57fbfba | 108 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 | 109 | * Look in inferior's $PATH. |
af1900b0 GB |
110 | * If IS_SOLIB is non-zero: |
111 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 112 | * |
85102364 | 113 | * The last check avoids doing this search when targeting remote |
b57fbfba | 114 | * machines since a sysroot will almost always be set. |
7f86f058 | 115 | */ |
e4f7b8c8 | 116 | |
797bc1cb | 117 | static gdb::unique_xmalloc_ptr<char> |
5b89c67a | 118 | solib_find_1 (const char *in_pathname, int *fd, bool is_solib) |
e4f7b8c8 | 119 | { |
9e468e95 | 120 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
e4f7b8c8 | 121 | int found_file = -1; |
e0cc99a6 | 122 | gdb::unique_xmalloc_ptr<char> temp_pathname; |
ab38a727 | 123 | const char *fskind = effective_target_file_system_kind (); |
e0700ba4 | 124 | const char *sysroot = gdb_sysroot.c_str (); |
f8773be1 | 125 | int prefix_len, orig_prefix_len; |
08105857 | 126 | |
a3be80c3 GB |
127 | /* If the absolute prefix starts with "target:" but the filesystem |
128 | accessed by the target_fileio_* methods is the local filesystem | |
129 | then we strip the "target:" prefix now and work with the local | |
130 | filesystem. This ensures that the same search algorithm is used | |
131 | for all local files regardless of whether a "target:" prefix was | |
132 | used. */ | |
133 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
134 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
135 | ||
f8773be1 GB |
136 | /* Strip any trailing slashes from the absolute prefix. */ |
137 | prefix_len = orig_prefix_len = strlen (sysroot); | |
f1d10cfb | 138 | |
f8773be1 GB |
139 | while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
140 | prefix_len--; | |
f1d10cfb | 141 | |
9a897d43 | 142 | std::string sysroot_holder; |
f8773be1 GB |
143 | if (prefix_len == 0) |
144 | sysroot = NULL; | |
145 | else if (prefix_len != orig_prefix_len) | |
146 | { | |
9a897d43 TT |
147 | sysroot_holder = std::string (sysroot, prefix_len); |
148 | sysroot = sysroot_holder.c_str (); | |
ab38a727 PA |
149 | } |
150 | ||
151 | /* If we're on a non-DOS-based system, backslashes won't be | |
152 | understood as directory separator, so, convert them to forward | |
153 | slashes, iff we're supposed to handle DOS-based file system | |
154 | semantics for target paths. */ | |
155 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
156 | { | |
157 | char *p; | |
158 | ||
159 | /* Avoid clobbering our input. */ | |
224c3ddb | 160 | p = (char *) alloca (strlen (in_pathname) + 1); |
ab38a727 PA |
161 | strcpy (p, in_pathname); |
162 | in_pathname = p; | |
163 | ||
164 | for (; *p; p++) | |
165 | { | |
166 | if (*p == '\\') | |
167 | *p = '/'; | |
168 | } | |
169 | } | |
170 | ||
171 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
172 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
173 | IN_PATHNAME is a target path. For example, if we're supposed to | |
174 | be handling DOS-like semantics we want to consider a | |
175 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
176 | With such a path, before giving up on the sysroot, we'll try: | |
177 | ||
178 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
179 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
180 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
181 | */ | |
182 | ||
b57fbfba | 183 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
e0cc99a6 | 184 | temp_pathname.reset (xstrdup (in_pathname)); |
ab38a727 PA |
185 | else |
186 | { | |
5b89c67a | 187 | bool need_dir_separator; |
ab38a727 | 188 | |
3736004f PA |
189 | /* Concatenate the sysroot and the target reported filename. We |
190 | may need to glue them with a directory separator. Cases to | |
191 | consider: | |
192 | ||
dda83cd7 SM |
193 | | sysroot | separator | in_pathname | |
194 | |-----------------+-----------+----------------| | |
195 | | /some/dir | / | c:/foo/bar.dll | | |
196 | | /some/dir | | /foo/bar.dll | | |
197 | | target: | | c:/foo/bar.dll | | |
198 | | target: | | /foo/bar.dll | | |
199 | | target:some/dir | / | c:/foo/bar.dll | | |
200 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
201 | |
202 | IOW, we don't need to add a separator if IN_PATHNAME already | |
6471e7d2 | 203 | has one, or when the sysroot is exactly "target:". |
3736004f PA |
204 | There's no need to check for drive spec explicitly, as we only |
205 | get here if IN_PATHNAME is considered an absolute path. */ | |
206 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 207 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 208 | |
f1d10cfb | 209 | /* Cat the prefixed pathname together. */ |
e0cc99a6 TT |
210 | temp_pathname.reset (concat (sysroot, |
211 | need_dir_separator ? SLASH_STRING : "", | |
212 | in_pathname, (char *) NULL)); | |
e4f7b8c8 MS |
213 | } |
214 | ||
2938e6cf | 215 | /* Handle files to be accessed via the target. */ |
e0cc99a6 | 216 | if (is_target_filename (temp_pathname.get ())) |
f1838a98 | 217 | { |
998d2a3e GB |
218 | if (fd != NULL) |
219 | *fd = -1; | |
e0cc99a6 | 220 | return temp_pathname; |
f1838a98 UW |
221 | } |
222 | ||
f1d10cfb | 223 | /* Now see if we can open it. */ |
13084383 SM |
224 | found_file = gdb_open_cloexec (temp_pathname.get (), |
225 | O_RDONLY | O_BINARY, 0).release (); | |
ab38a727 PA |
226 | |
227 | /* If the search in gdb_sysroot failed, and the path name has a | |
228 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
229 | and retrying in the sysroot: | |
230 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 231 | |
ab38a727 | 232 | if (found_file < 0 |
b57fbfba | 233 | && sysroot != NULL |
ab38a727 PA |
234 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
235 | { | |
5b89c67a | 236 | bool need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); |
e0cc99a6 | 237 | char drive[2] = { in_pathname[0], '\0' }; |
ab38a727 | 238 | |
e0cc99a6 TT |
239 | temp_pathname.reset (concat (sysroot, |
240 | SLASH_STRING, | |
241 | drive, | |
242 | need_dir_separator ? SLASH_STRING : "", | |
243 | in_pathname + 2, (char *) NULL)); | |
ab38a727 | 244 | |
e0cc99a6 | 245 | found_file = gdb_open_cloexec (temp_pathname.get (), |
13084383 | 246 | O_RDONLY | O_BINARY, 0).release (); |
ab38a727 PA |
247 | if (found_file < 0) |
248 | { | |
ab38a727 PA |
249 | /* If the search in gdb_sysroot still failed, try fully |
250 | stripping the drive spec, and trying once more in the | |
251 | sysroot before giving up. | |
252 | ||
253 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
254 | ||
e0cc99a6 TT |
255 | temp_pathname.reset (concat (sysroot, |
256 | need_dir_separator ? SLASH_STRING : "", | |
257 | in_pathname + 2, (char *) NULL)); | |
ab38a727 | 258 | |
e0cc99a6 | 259 | found_file = gdb_open_cloexec (temp_pathname.get (), |
13084383 | 260 | O_RDONLY | O_BINARY, 0).release (); |
ab38a727 PA |
261 | } |
262 | } | |
0997b535 | 263 | |
ab38a727 PA |
264 | /* We try to find the library in various ways. After each attempt, |
265 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
266 | found_file < 0 and temp_pathname does not point to storage that | |
267 | needs to be freed. */ | |
268 | ||
269 | if (found_file < 0) | |
e0cc99a6 | 270 | temp_pathname.reset (NULL); |
ab38a727 | 271 | |
f822c95b | 272 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
273 | absolute at this point, make it relative. (openp will try and open the |
274 | file according to its absolute path otherwise, which is not what we want.) | |
275 | Affects subsequent searches for this solib. */ | |
ab38a727 | 276 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
277 | { |
278 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
279 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
280 | in_pathname++; | |
ba5f0d88 OF |
281 | |
282 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
283 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
284 | in_pathname++; | |
ba5f0d88 | 285 | } |
ab38a727 | 286 | |
af1900b0 GB |
287 | /* If not found, and we're looking for a solib, search the |
288 | solib_search_path (if any). */ | |
e0700ba4 SM |
289 | if (is_solib && found_file < 0 && !solib_search_path.empty ()) |
290 | found_file = openp (solib_search_path.c_str (), | |
492c0ab7 | 291 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, |
fbdebf46 | 292 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 293 | |
af1900b0 GB |
294 | /* If not found, and we're looking for a solib, next search the |
295 | solib_search_path (if any) for the basename only (ignoring the | |
296 | path). This is to allow reading solibs from a path that differs | |
297 | from the opened path. */ | |
e0700ba4 SM |
298 | if (is_solib && found_file < 0 && !solib_search_path.empty ()) |
299 | found_file = openp (solib_search_path.c_str (), | |
492c0ab7 | 300 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, |
ab38a727 PA |
301 | target_lbasename (fskind, in_pathname), |
302 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 303 | |
af1900b0 GB |
304 | /* If not found, and we're looking for a solib, try to use target |
305 | supplied solib search method. */ | |
306 | if (is_solib && found_file < 0 && ops->find_and_open_solib) | |
637d6690 | 307 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 308 | &temp_pathname); |
2610b0bf | 309 | |
c378eb4e | 310 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 311 | if (found_file < 0 && sysroot == NULL) |
9a6c7d9c | 312 | found_file = openp (current_inferior ()->environment.get ("PATH"), |
492c0ab7 JK |
313 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
314 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 315 | |
af1900b0 GB |
316 | /* If not found, and we're looking for a solib, next search the |
317 | inferior's $LD_LIBRARY_PATH environment variable. */ | |
318 | if (is_solib && found_file < 0 && sysroot == NULL) | |
9a6c7d9c SDJ |
319 | found_file = openp (current_inferior ()->environment.get |
320 | ("LD_LIBRARY_PATH"), | |
492c0ab7 JK |
321 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
322 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 323 | |
998d2a3e GB |
324 | if (fd == NULL) |
325 | { | |
326 | if (found_file >= 0) | |
327 | close (found_file); | |
328 | } | |
329 | else | |
330 | *fd = found_file; | |
331 | ||
e0cc99a6 | 332 | return temp_pathname; |
572d275c UW |
333 | } |
334 | ||
af1900b0 | 335 | /* Return the full pathname of the main executable, or NULL if not |
797bc1cb TT |
336 | found. If FD is non-NULL, *FD is set to either -1 or an open file |
337 | handle for the main executable. */ | |
af1900b0 | 338 | |
797bc1cb | 339 | gdb::unique_xmalloc_ptr<char> |
992f1ddc | 340 | exec_file_find (const char *in_pathname, int *fd) |
af1900b0 | 341 | { |
797bc1cb | 342 | gdb::unique_xmalloc_ptr<char> result; |
ecf45d2c SL |
343 | const char *fskind = effective_target_file_system_kind (); |
344 | ||
345 | if (in_pathname == NULL) | |
346 | return NULL; | |
af1900b0 | 347 | |
e0700ba4 | 348 | if (!gdb_sysroot.empty () && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
af1900b0 | 349 | { |
5b89c67a | 350 | result = solib_find_1 (in_pathname, fd, false); |
af1900b0 | 351 | |
ecf45d2c | 352 | if (result == NULL && fskind == file_system_kind_dos_based) |
af1900b0 GB |
353 | { |
354 | char *new_pathname; | |
355 | ||
224c3ddb | 356 | new_pathname = (char *) alloca (strlen (in_pathname) + 5); |
af1900b0 GB |
357 | strcpy (new_pathname, in_pathname); |
358 | strcat (new_pathname, ".exe"); | |
359 | ||
5b89c67a | 360 | result = solib_find_1 (new_pathname, fd, false); |
af1900b0 GB |
361 | } |
362 | } | |
ecf45d2c SL |
363 | else |
364 | { | |
365 | /* It's possible we don't have a full path, but rather just a | |
366 | filename. Some targets, such as HP-UX, don't provide the | |
367 | full path, sigh. | |
368 | ||
369 | Attempt to qualify the filename against the source path. | |
370 | (If that fails, we'll just fall back on the original | |
371 | filename. Not much more we can do...) */ | |
372 | ||
e0cc99a6 | 373 | if (!source_full_path_of (in_pathname, &result)) |
797bc1cb | 374 | result.reset (xstrdup (in_pathname)); |
ecf45d2c SL |
375 | if (fd != NULL) |
376 | *fd = -1; | |
377 | } | |
af1900b0 GB |
378 | |
379 | return result; | |
380 | } | |
381 | ||
382 | /* Return the full pathname of a shared library file, or NULL if not | |
797bc1cb TT |
383 | found. If FD is non-NULL, *FD is set to either -1 or an open file |
384 | handle for the shared library. | |
af1900b0 GB |
385 | |
386 | The search algorithm used is described in solib_find_1's comment | |
387 | above. */ | |
388 | ||
797bc1cb | 389 | gdb::unique_xmalloc_ptr<char> |
992f1ddc | 390 | solib_find (const char *in_pathname, int *fd) |
af1900b0 GB |
391 | { |
392 | const char *solib_symbols_extension | |
393 | = gdbarch_solib_symbols_extension (target_gdbarch ()); | |
394 | ||
395 | /* If solib_symbols_extension is set, replace the file's | |
396 | extension. */ | |
397 | if (solib_symbols_extension != NULL) | |
398 | { | |
992f1ddc | 399 | const char *p = in_pathname + strlen (in_pathname); |
af1900b0 GB |
400 | |
401 | while (p > in_pathname && *p != '.') | |
402 | p--; | |
403 | ||
404 | if (*p == '.') | |
405 | { | |
406 | char *new_pathname; | |
407 | ||
224c3ddb SM |
408 | new_pathname |
409 | = (char *) alloca (p - in_pathname + 1 | |
410 | + strlen (solib_symbols_extension) + 1); | |
af1900b0 GB |
411 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); |
412 | strcpy (new_pathname + (p - in_pathname) + 1, | |
413 | solib_symbols_extension); | |
414 | ||
415 | in_pathname = new_pathname; | |
416 | } | |
417 | } | |
418 | ||
5b89c67a | 419 | return solib_find_1 (in_pathname, fd, true); |
af1900b0 GB |
420 | } |
421 | ||
572d275c UW |
422 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, |
423 | it is used as file handle to open the file. Throws an error if the file | |
424 | could not be opened. Handles both local and remote file access. | |
425 | ||
797bc1cb | 426 | If unsuccessful, the FD will be closed (unless FD was -1). */ |
572d275c | 427 | |
192b62ce | 428 | gdb_bfd_ref_ptr |
797bc1cb | 429 | solib_bfd_fopen (const char *pathname, int fd) |
572d275c | 430 | { |
192b62ce | 431 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (pathname, gnutarget, fd)); |
572d275c | 432 | |
192b62ce TT |
433 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd.get ())) |
434 | bfd_set_cacheable (abfd.get (), 1); | |
f1838a98 | 435 | |
192b62ce | 436 | if (abfd == NULL) |
f1838a98 | 437 | { |
9a897d43 | 438 | /* Arrange to free PATHNAME when the error is thrown. */ |
f1838a98 | 439 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 440 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
441 | } |
442 | ||
520b0001 | 443 | return abfd; |
572d275c UW |
444 | } |
445 | ||
446 | /* Find shared library PATHNAME and open a BFD for it. */ | |
447 | ||
192b62ce | 448 | gdb_bfd_ref_ptr |
692d6f97 | 449 | solib_bfd_open (const char *pathname) |
572d275c | 450 | { |
572d275c | 451 | int found_file; |
378d2b72 | 452 | const struct bfd_arch_info *b; |
572d275c | 453 | |
572d275c | 454 | /* Search for shared library file. */ |
797bc1cb TT |
455 | gdb::unique_xmalloc_ptr<char> found_pathname |
456 | = solib_find (pathname, &found_file); | |
572d275c | 457 | if (found_pathname == NULL) |
048d532d PA |
458 | { |
459 | /* Return failure if the file could not be found, so that we can | |
460 | accumulate messages about missing libraries. */ | |
461 | if (errno == ENOENT) | |
462 | return NULL; | |
463 | ||
464 | perror_with_name (pathname); | |
465 | } | |
572d275c UW |
466 | |
467 | /* Open bfd for shared library. */ | |
797bc1cb | 468 | gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname.get (), found_file)); |
572d275c UW |
469 | |
470 | /* Check bfd format. */ | |
192b62ce TT |
471 | if (!bfd_check_format (abfd.get (), bfd_object)) |
472 | error (_("`%s': not in executable format: %s"), | |
00f93c44 | 473 | bfd_get_filename (abfd.get ()), bfd_errmsg (bfd_get_error ())); |
f1838a98 | 474 | |
378d2b72 | 475 | /* Check bfd arch. */ |
f5656ead | 476 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
192b62ce | 477 | if (!b->compatible (b, bfd_get_arch_info (abfd.get ()))) |
c0e0d6bc TT |
478 | error (_("`%s': Shared library architecture %s is not compatible " |
479 | "with target architecture %s."), bfd_get_filename (abfd.get ()), | |
480 | bfd_get_arch_info (abfd.get ())->printable_name, | |
481 | b->printable_name); | |
378d2b72 | 482 | |
f1838a98 | 483 | return abfd; |
e4f7b8c8 MS |
484 | } |
485 | ||
39f53acb AM |
486 | /* Mapping of a core file's shared library sonames to their respective |
487 | build-ids. Added to the registries of core file bfds. */ | |
488 | ||
489 | typedef std::unordered_map<std::string, std::string> soname_build_id_map; | |
490 | ||
491 | /* Key used to associate a soname_build_id_map to a core file bfd. */ | |
492 | ||
08b8a139 TT |
493 | static const struct registry<bfd>::key<soname_build_id_map> |
494 | cbfd_soname_build_id_data_key; | |
39f53acb AM |
495 | |
496 | /* See solib.h. */ | |
497 | ||
498 | void | |
499 | set_cbfd_soname_build_id (gdb_bfd_ref_ptr abfd, | |
500 | const char *soname, | |
501 | const bfd_build_id *build_id) | |
502 | { | |
503 | gdb_assert (abfd.get () != nullptr); | |
504 | gdb_assert (soname != nullptr); | |
505 | gdb_assert (build_id != nullptr); | |
506 | ||
507 | soname_build_id_map *mapptr = cbfd_soname_build_id_data_key.get (abfd.get ()); | |
508 | ||
509 | if (mapptr == nullptr) | |
510 | mapptr = cbfd_soname_build_id_data_key.emplace (abfd.get ()); | |
511 | ||
512 | (*mapptr)[soname] = build_id_to_string (build_id); | |
513 | } | |
514 | ||
515 | /* See solib.h. */ | |
516 | ||
517 | gdb::unique_xmalloc_ptr<char> | |
518 | get_cbfd_soname_build_id (gdb_bfd_ref_ptr abfd, const char *soname) | |
519 | { | |
520 | if (abfd.get () == nullptr || soname == nullptr) | |
521 | return {}; | |
522 | ||
523 | soname_build_id_map *mapptr | |
524 | = cbfd_soname_build_id_data_key.get (abfd.get ()); | |
525 | ||
526 | if (mapptr == nullptr) | |
527 | return {}; | |
528 | ||
529 | auto it = mapptr->find (lbasename (soname)); | |
530 | if (it == mapptr->end ()) | |
531 | return {}; | |
532 | ||
533 | return make_unique_xstrdup (it->second.c_str ()); | |
534 | } | |
535 | ||
7f86f058 PA |
536 | /* Given a pointer to one of the shared objects in our list of mapped |
537 | objects, use the recorded name to open a bfd descriptor for the | |
538 | object, build a section table, relocate all the section addresses | |
539 | by the base address at which the shared object was mapped, and then | |
540 | add the sections to the target's section table. | |
e4f7b8c8 | 541 | |
7f86f058 PA |
542 | FIXME: In most (all?) cases the shared object file name recorded in |
543 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
544 | cases where it isn't, do we really mimic the systems search |
545 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 546 | expansion stuff?). */ |
c906108c SS |
547 | |
548 | static int | |
048d532d | 549 | solib_map_sections (struct so_list *so) |
c906108c | 550 | { |
9e468e95 | 551 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
c5aa993b | 552 | |
ee0c3293 TT |
553 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (so->so_name)); |
554 | gdb_bfd_ref_ptr abfd (ops->bfd_open (filename.get ())); | |
b91f93a0 AM |
555 | gdb::unique_xmalloc_ptr<char> build_id_hexstr |
556 | = get_cbfd_soname_build_id (current_program_space->cbfd, so->so_name); | |
557 | ||
558 | /* If we already know the build-id of this solib from a core file, verify | |
559 | it matches ABFD's build-id. If there is a mismatch or the solib wasn't | |
560 | found, attempt to query debuginfod for the correct solib. */ | |
561 | if (build_id_hexstr.get () != nullptr) | |
562 | { | |
563 | bool mismatch = false; | |
564 | ||
565 | if (abfd != nullptr && abfd->build_id != nullptr) | |
566 | { | |
567 | std::string build_id = build_id_to_string (abfd->build_id); | |
568 | ||
569 | if (build_id != build_id_hexstr.get ()) | |
570 | mismatch = true; | |
571 | } | |
572 | if (abfd == nullptr || mismatch) | |
573 | { | |
574 | scoped_fd fd = debuginfod_exec_query ((const unsigned char*) | |
575 | build_id_hexstr.get (), | |
576 | 0, so->so_name, &filename); | |
577 | ||
578 | if (fd.get () >= 0) | |
579 | abfd = ops->bfd_open (filename.get ()); | |
580 | else if (mismatch) | |
581 | warning (_("Build-id of %ps does not match core file."), | |
582 | styled_string (file_name_style.style (), filename.get ())); | |
583 | } | |
584 | } | |
e4f7b8c8 | 585 | |
048d532d PA |
586 | if (abfd == NULL) |
587 | return 0; | |
588 | ||
13437d4b | 589 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
192b62ce | 590 | so->abfd = abfd.release (); |
23e04971 | 591 | |
b030cf11 JB |
592 | /* Copy the full path name into so_name, allowing symbol_file_add |
593 | to find it later. This also affects the =library-loaded GDB/MI | |
594 | event, and in particular the part of that notification providing | |
595 | the library's host-side path. If we let the target dictate | |
596 | that objfile's path, and the target is different from the host, | |
597 | GDB/MI will not provide the correct host-side path. */ | |
192b62ce | 598 | if (strlen (bfd_get_filename (so->abfd)) >= SO_NAME_MAX_PATH_SIZE) |
b030cf11 | 599 | error (_("Shared library file name is too long.")); |
192b62ce | 600 | strcpy (so->so_name, bfd_get_filename (so->abfd)); |
b030cf11 | 601 | |
bb2a6777 TT |
602 | if (so->sections == nullptr) |
603 | so->sections = new target_section_table; | |
2d128614 | 604 | *so->sections = build_section_table (so->abfd); |
104c1213 | 605 | |
d7a78e5c | 606 | for (target_section &p : *so->sections) |
104c1213 | 607 | { |
13437d4b | 608 | /* Relocate the section binding addresses as recorded in the shared |
dda83cd7 SM |
609 | object's file by the base address to which the object was actually |
610 | mapped. */ | |
bb2a6777 | 611 | ops->relocate_section_addresses (so, &p); |
cfa9d6d9 DJ |
612 | |
613 | /* If the target didn't provide information about the address | |
614 | range of the shared object, assume we want the location of | |
615 | the .text section. */ | |
616 | if (so->addr_low == 0 && so->addr_high == 0 | |
bb2a6777 | 617 | && strcmp (p.the_bfd_section->name, ".text") == 0) |
13437d4b | 618 | { |
bb2a6777 TT |
619 | so->addr_low = p.addr; |
620 | so->addr_high = p.endaddr; | |
13437d4b | 621 | } |
104c1213 JM |
622 | } |
623 | ||
048d532d PA |
624 | /* Add the shared object's sections to the current set of file |
625 | section tables. Do this immediately after mapping the object so | |
626 | that later nodes in the list can query this object, as is needed | |
627 | in solib-osf.c. */ | |
3769e227 | 628 | current_program_space->add_target_sections (so, *so->sections); |
048d532d PA |
629 | |
630 | return 1; | |
104c1213 | 631 | } |
c906108c | 632 | |
0892cb63 DE |
633 | /* Free symbol-file related contents of SO and reset for possible reloading |
634 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
635 | sections in some target's section table, the caller is responsible for | |
636 | removing them. | |
a86988f2 PA |
637 | |
638 | This function doesn't mess with objfiles at all. If there is an | |
639 | objfile associated with SO that needs to be removed, the caller is | |
640 | responsible for taking care of that. */ | |
641 | ||
642 | static void | |
0892cb63 | 643 | clear_so (struct so_list *so) |
a86988f2 | 644 | { |
9e468e95 | 645 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
0892cb63 | 646 | |
bb2a6777 TT |
647 | delete so->sections; |
648 | so->sections = NULL; | |
a86988f2 PA |
649 | |
650 | gdb_bfd_unref (so->abfd); | |
651 | so->abfd = NULL; | |
652 | ||
653 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
654 | so->symbols_loaded = 0; | |
655 | so->objfile = NULL; | |
656 | ||
657 | so->addr_low = so->addr_high = 0; | |
658 | ||
659 | /* Restore the target-supplied file name. SO_NAME may be the path | |
660 | of the symbol file. */ | |
661 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 DE |
662 | |
663 | /* Do the same for target-specific data. */ | |
664 | if (ops->clear_so != NULL) | |
665 | ops->clear_so (so); | |
a86988f2 PA |
666 | } |
667 | ||
7f86f058 | 668 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 669 | If we have opened a BFD for SO, close it. |
c906108c | 670 | |
07cd4b97 JB |
671 | The caller is responsible for removing SO from whatever list it is |
672 | a member of. If we have placed SO's sections in some target's | |
673 | section table, the caller is responsible for removing them. | |
c906108c | 674 | |
07cd4b97 JB |
675 | This function doesn't mess with objfiles at all. If there is an |
676 | objfile associated with SO that needs to be removed, the caller is | |
677 | responsible for taking care of that. */ | |
678 | ||
13437d4b | 679 | void |
07cd4b97 | 680 | free_so (struct so_list *so) |
c906108c | 681 | { |
9e468e95 | 682 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
c5aa993b | 683 | |
0892cb63 | 684 | clear_so (so); |
66aba65d | 685 | ops->free_so (so); |
07cd4b97 | 686 | |
b8c9b27d | 687 | xfree (so); |
c906108c SS |
688 | } |
689 | ||
07cd4b97 | 690 | |
7eedccfa | 691 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
5b89c67a | 692 | be chatty about it. Return true if any symbols were actually loaded. */ |
42a6e6a0 | 693 | |
5b89c67a | 694 | bool |
b15cc25c | 695 | solib_read_symbols (struct so_list *so, symfile_add_flags flags) |
42a6e6a0 MK |
696 | { |
697 | if (so->symbols_loaded) | |
698 | { | |
a86988f2 | 699 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 700 | } |
8bb75286 DJ |
701 | else if (so->abfd == NULL) |
702 | { | |
048d532d PA |
703 | /* We've already warned about this library, when trying to open |
704 | it. */ | |
8bb75286 | 705 | } |
42a6e6a0 MK |
706 | else |
707 | { | |
048d532d | 708 | |
7dcd53a0 TT |
709 | flags |= current_inferior ()->symfile_flags; |
710 | ||
a70b8144 | 711 | try |
048d532d | 712 | { |
048d532d | 713 | /* Have we already loaded this shared object? */ |
aed57c53 | 714 | so->objfile = nullptr; |
2030c079 | 715 | for (objfile *objfile : current_program_space->objfiles ()) |
048d532d | 716 | { |
aed57c53 TT |
717 | if (filename_cmp (objfile_name (objfile), so->so_name) == 0 |
718 | && objfile->addr_low == so->addr_low) | |
719 | { | |
720 | so->objfile = objfile; | |
721 | break; | |
722 | } | |
048d532d | 723 | } |
9c6595ab PA |
724 | if (so->objfile == NULL) |
725 | { | |
37e136b1 | 726 | section_addr_info sap |
bb2a6777 | 727 | = build_section_addr_info_from_section_table (*so->sections); |
98badbfd TT |
728 | gdb_bfd_ref_ptr tmp_bfd |
729 | (gdb_bfd_ref_ptr::new_reference (so->abfd)); | |
730 | so->objfile = symbol_file_add_from_bfd (tmp_bfd, so->so_name, | |
37e136b1 TT |
731 | flags, &sap, |
732 | OBJF_SHARED, NULL); | |
9c6595ab | 733 | so->objfile->addr_low = so->addr_low; |
9c6595ab | 734 | } |
492d29ea PA |
735 | |
736 | so->symbols_loaded = 1; | |
737 | } | |
230d2906 | 738 | catch (const gdb_exception_error &e) |
492d29ea PA |
739 | { |
740 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
741 | " library symbols for %s:\n"), | |
742 | so->so_name); | |
048d532d PA |
743 | } |
744 | ||
5b89c67a | 745 | return true; |
42a6e6a0 MK |
746 | } |
747 | ||
5b89c67a | 748 | return false; |
42a6e6a0 | 749 | } |
c906108c | 750 | |
a1fd1ac9 TT |
751 | /* Return true if KNOWN->objfile is used by any other so_list object |
752 | in the list of shared libraries. Return false otherwise. */ | |
59145f8c | 753 | |
5b89c67a | 754 | static bool |
59145f8c AR |
755 | solib_used (const struct so_list *const known) |
756 | { | |
a1fd1ac9 | 757 | for (const struct so_list *pivot : current_program_space->solibs ()) |
59145f8c | 758 | if (pivot != known && pivot->objfile == known->objfile) |
5b89c67a CB |
759 | return true; |
760 | return false; | |
59145f8c AR |
761 | } |
762 | ||
51457a05 | 763 | /* See solib.h. */ |
c906108c | 764 | |
e696b3ad MAL |
765 | void |
766 | update_solib_list (int from_tty) | |
07cd4b97 | 767 | { |
9e468e95 | 768 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
66aba65d | 769 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
770 | struct so_list *gdb, **gdb_link; |
771 | ||
181e7f93 PA |
772 | /* We can reach here due to changing solib-search-path or the |
773 | sysroot, before having any inferior. */ | |
55f6301a | 774 | if (target_has_execution () && inferior_ptid != null_ptid) |
181e7f93 PA |
775 | { |
776 | struct inferior *inf = current_inferior (); | |
777 | ||
778 | /* If we are attaching to a running process for which we | |
779 | have not opened a symbol file, we may be able to get its | |
780 | symbols now! */ | |
a42d7dd8 TT |
781 | if (inf->attach_flag |
782 | && current_program_space->symfile_object_file == NULL) | |
bf469271 | 783 | { |
a70b8144 | 784 | try |
bf469271 PA |
785 | { |
786 | ops->open_symbol_file_object (from_tty); | |
787 | } | |
230d2906 | 788 | catch (const gdb_exception &ex) |
bf469271 PA |
789 | { |
790 | exception_fprintf (gdb_stderr, ex, | |
791 | "Error reading attached " | |
792 | "process's symbol file.\n"); | |
793 | } | |
bf469271 | 794 | } |
181e7f93 | 795 | } |
104c1213 | 796 | |
07cd4b97 JB |
797 | /* GDB and the inferior's dynamic linker each maintain their own |
798 | list of currently loaded shared objects; we want to bring the | |
799 | former in sync with the latter. Scan both lists, seeing which | |
800 | shared objects appear where. There are three cases: | |
801 | ||
802 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
803 | knows about it already, and it's still loaded in the inferior. |
804 | Nothing needs to happen. | |
07cd4b97 JB |
805 | |
806 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
807 | the inferior has unloaded it. We should remove the shared |
808 | object from GDB's tables. | |
07cd4b97 JB |
809 | |
810 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
811 | means that it's just been loaded. We should add it to GDB's |
812 | tables. | |
07cd4b97 JB |
813 | |
814 | So we walk GDB's list, checking each entry to see if it appears | |
815 | in the inferior's list too. If it does, no action is needed, and | |
816 | we remove it from the inferior's list. If it doesn't, the | |
817 | inferior has unloaded it, and we remove it from GDB's list. By | |
818 | the time we're done walking GDB's list, the inferior's list | |
819 | contains only the new shared objects, which we then add. */ | |
820 | ||
a1fd1ac9 TT |
821 | gdb = current_program_space->so_list; |
822 | gdb_link = ¤t_program_space->so_list; | |
07cd4b97 | 823 | while (gdb) |
c906108c | 824 | { |
07cd4b97 JB |
825 | struct so_list *i = inferior; |
826 | struct so_list **i_link = &inferior; | |
827 | ||
828 | /* Check to see whether the shared object *gdb also appears in | |
829 | the inferior's current list. */ | |
830 | while (i) | |
c906108c | 831 | { |
a7c02bc8 VP |
832 | if (ops->same) |
833 | { | |
834 | if (ops->same (gdb, i)) | |
835 | break; | |
836 | } | |
837 | else | |
838 | { | |
0ba1096a | 839 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
840 | break; |
841 | } | |
07cd4b97 JB |
842 | |
843 | i_link = &i->next; | |
844 | i = *i_link; | |
c906108c | 845 | } |
c5aa993b | 846 | |
07cd4b97 | 847 | /* If the shared object appears on the inferior's list too, then |
dda83cd7 SM |
848 | it's still loaded, so we don't need to do anything. Delete |
849 | it from the inferior's list, and leave it on GDB's list. */ | |
07cd4b97 | 850 | if (i) |
c906108c | 851 | { |
07cd4b97 | 852 | *i_link = i->next; |
07cd4b97 JB |
853 | free_so (i); |
854 | gdb_link = &gdb->next; | |
855 | gdb = *gdb_link; | |
856 | } | |
857 | ||
858 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
859 | else | |
860 | { | |
42a6e6a0 MK |
861 | /* Notify any observer that the shared object has been |
862 | unloaded before we remove it from GDB's tables. */ | |
76727919 | 863 | gdb::observers::solib_unloaded.notify (gdb); |
84acb35a | 864 | |
6fb16ce6 | 865 | current_program_space->deleted_solibs.push_back (gdb->so_name); |
edcc5120 | 866 | |
07cd4b97 | 867 | *gdb_link = gdb->next; |
07cd4b97 JB |
868 | |
869 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
870 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
871 | && !solib_used (gdb)) | |
268e4f09 | 872 | gdb->objfile->unlink (); |
07cd4b97 JB |
873 | |
874 | /* Some targets' section tables might be referring to | |
875 | sections from so->abfd; remove them. */ | |
2a3f84af | 876 | current_program_space->remove_target_sections (gdb); |
07cd4b97 JB |
877 | |
878 | free_so (gdb); | |
879 | gdb = *gdb_link; | |
c906108c SS |
880 | } |
881 | } | |
c5aa993b | 882 | |
07cd4b97 JB |
883 | /* Now the inferior's list contains only shared objects that don't |
884 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 885 | to GDB's shared object list. */ |
07cd4b97 | 886 | if (inferior) |
c906108c | 887 | { |
048d532d PA |
888 | int not_found = 0; |
889 | const char *not_found_filename = NULL; | |
890 | ||
07cd4b97 JB |
891 | struct so_list *i; |
892 | ||
893 | /* Add the new shared objects to GDB's list. */ | |
894 | *gdb_link = inferior; | |
895 | ||
e8930304 | 896 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 897 | for (i = inferior; i; i = i->next) |
c906108c | 898 | { |
048d532d | 899 | |
6c95b8df | 900 | i->pspace = current_program_space; |
bcb430e4 | 901 | current_program_space->added_solibs.push_back (i); |
07cd4b97 | 902 | |
a70b8144 | 903 | try |
048d532d PA |
904 | { |
905 | /* Fill in the rest of the `struct so_list' node. */ | |
906 | if (!solib_map_sections (i)) | |
907 | { | |
908 | not_found++; | |
909 | if (not_found_filename == NULL) | |
910 | not_found_filename = i->so_original_name; | |
911 | } | |
912 | } | |
07cd4b97 | 913 | |
230d2906 | 914 | catch (const gdb_exception_error &e) |
492d29ea PA |
915 | { |
916 | exception_fprintf (gdb_stderr, e, | |
917 | _("Error while mapping shared " | |
918 | "library sections:\n")); | |
919 | } | |
42a6e6a0 MK |
920 | |
921 | /* Notify any observer that the shared object has been | |
048d532d | 922 | loaded now that we've added it to GDB's tables. */ |
76727919 | 923 | gdb::observers::solib_loaded.notify (i); |
c906108c | 924 | } |
048d532d PA |
925 | |
926 | /* If a library was not found, issue an appropriate warning | |
927 | message. We have to use a single call to warning in case the | |
928 | front end does something special with warnings, e.g., pop up | |
929 | a dialog box. It Would Be Nice if we could get a "warning: " | |
930 | prefix on each line in the CLI front end, though - it doesn't | |
931 | stand out well. */ | |
932 | ||
933 | if (not_found == 1) | |
3e43a32a MS |
934 | warning (_("Could not load shared library symbols for %s.\n" |
935 | "Do you need \"set solib-search-path\" " | |
936 | "or \"set sysroot\"?"), | |
048d532d PA |
937 | not_found_filename); |
938 | else if (not_found > 1) | |
939 | warning (_("\ | |
940 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
941 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
942 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
943 | not_found, not_found_filename); | |
e8930304 | 944 | } |
105b175f JB |
945 | } |
946 | ||
17a37d48 PP |
947 | |
948 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
949 | |
950 | Uses a fairly simplistic heuristic approach where we check | |
951 | the file name against "/libpthread". This can lead to false | |
e2b9ea4b KB |
952 | positives, but this should be good enough in practice. |
953 | ||
954 | As of glibc-2.34, functions formerly residing in libpthread have | |
955 | been moved to libc, so "/libc." needs to be checked too. (Matching | |
956 | the "." will avoid matching libraries such as libcrypt.) */ | |
6612ad7f | 957 | |
5b89c67a | 958 | bool |
17a37d48 PP |
959 | libpthread_name_p (const char *name) |
960 | { | |
e2b9ea4b KB |
961 | return (strstr (name, "/libpthread") != NULL |
962 | || strstr (name, "/libc.") != NULL ); | |
17a37d48 PP |
963 | } |
964 | ||
965 | /* Return non-zero if SO is the libpthread shared library. */ | |
966 | ||
5b89c67a | 967 | static bool |
6612ad7f JB |
968 | libpthread_solib_p (struct so_list *so) |
969 | { | |
17a37d48 | 970 | return libpthread_name_p (so->so_name); |
6612ad7f | 971 | } |
105b175f | 972 | |
7f86f058 | 973 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
974 | match PATTERN. (If we've already read a shared object's symbol |
975 | info, leave it alone.) If PATTERN is zero, read them all. | |
976 | ||
990f9fe3 FF |
977 | If READSYMS is 0, defer reading symbolic information until later |
978 | but still do any needed low level processing. | |
979 | ||
e696b3ad | 980 | FROM_TTY is described for update_solib_list, above. */ |
105b175f JB |
981 | |
982 | void | |
e696b3ad | 983 | solib_add (const char *pattern, int from_tty, int readsyms) |
105b175f | 984 | { |
770e7fc7 DE |
985 | if (print_symbol_loading_p (from_tty, 0, 0)) |
986 | { | |
987 | if (pattern != NULL) | |
988 | { | |
6cb06a8c TT |
989 | gdb_printf (_("Loading symbols for shared libraries: %s\n"), |
990 | pattern); | |
770e7fc7 DE |
991 | } |
992 | else | |
6cb06a8c | 993 | gdb_printf (_("Loading symbols for shared libraries.\n")); |
770e7fc7 DE |
994 | } |
995 | ||
2eff07b3 PP |
996 | current_program_space->solib_add_generation++; |
997 | ||
105b175f JB |
998 | if (pattern) |
999 | { | |
1000 | char *re_err = re_comp (pattern); | |
1001 | ||
1002 | if (re_err) | |
8a3fe4f8 | 1003 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
1004 | } |
1005 | ||
e696b3ad | 1006 | update_solib_list (from_tty); |
c906108c | 1007 | |
105b175f JB |
1008 | /* Walk the list of currently loaded shared libraries, and read |
1009 | symbols for any that match the pattern --- or any whose symbols | |
1010 | aren't already loaded, if no pattern was given. */ | |
e8930304 | 1011 | { |
5b89c67a CB |
1012 | bool any_matches = false; |
1013 | bool loaded_any_symbols = false; | |
b15cc25c PA |
1014 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1015 | ||
1016 | if (from_tty) | |
dda83cd7 | 1017 | add_flags |= SYMFILE_VERBOSE; |
c906108c | 1018 | |
a1fd1ac9 | 1019 | for (struct so_list *gdb : current_program_space->solibs ()) |
e8930304 JB |
1020 | if (! pattern || re_exec (gdb->so_name)) |
1021 | { | |
dda83cd7 SM |
1022 | /* Normally, we would read the symbols from that library |
1023 | only if READSYMS is set. However, we're making a small | |
1024 | exception for the pthread library, because we sometimes | |
1025 | need the library symbols to be loaded in order to provide | |
1026 | thread support (x86-linux for instance). */ | |
1027 | const int add_this_solib = | |
1028 | (readsyms || libpthread_solib_p (gdb)); | |
6612ad7f | 1029 | |
5b89c67a | 1030 | any_matches = true; |
a86988f2 PA |
1031 | if (add_this_solib) |
1032 | { | |
1033 | if (gdb->symbols_loaded) | |
1034 | { | |
1035 | /* If no pattern was given, be quiet for shared | |
1036 | libraries we have already loaded. */ | |
1037 | if (pattern && (from_tty || info_verbose)) | |
6cb06a8c TT |
1038 | gdb_printf (_("Symbols already loaded for %s\n"), |
1039 | gdb->so_name); | |
a86988f2 | 1040 | } |
b15cc25c | 1041 | else if (solib_read_symbols (gdb, add_flags)) |
5b89c67a | 1042 | loaded_any_symbols = true; |
a86988f2 | 1043 | } |
e8930304 JB |
1044 | } |
1045 | ||
7eedccfa PP |
1046 | if (loaded_any_symbols) |
1047 | breakpoint_re_set (); | |
1048 | ||
e8930304 | 1049 | if (from_tty && pattern && ! any_matches) |
6cb06a8c | 1050 | gdb_printf |
e8930304 JB |
1051 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); |
1052 | ||
1053 | if (loaded_any_symbols) | |
1054 | { | |
1055 | /* Getting new symbols may change our opinion about what is | |
1056 | frameless. */ | |
1057 | reinit_frame_cache (); | |
e8930304 JB |
1058 | } |
1059 | } | |
c906108c SS |
1060 | } |
1061 | ||
7f86f058 PA |
1062 | /* Implement the "info sharedlibrary" command. Walk through the |
1063 | shared library list and print information about each attached | |
1064 | library matching PATTERN. If PATTERN is elided, print them | |
1065 | all. */ | |
c906108c SS |
1066 | |
1067 | static void | |
1d12d88f | 1068 | info_sharedlibrary_command (const char *pattern, int from_tty) |
c906108c | 1069 | { |
5b89c67a | 1070 | bool so_missing_debug_info = false; |
c906108c | 1071 | int addr_width; |
55333a84 | 1072 | int nr_libs; |
f5656ead | 1073 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1074 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1075 | |
1076 | if (pattern) | |
1077 | { | |
1078 | char *re_err = re_comp (pattern); | |
1079 | ||
1080 | if (re_err) | |
1081 | error (_("Invalid regexp: %s"), re_err); | |
1082 | } | |
c906108c | 1083 | |
84eb3c4f | 1084 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1085 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1086 | |
e696b3ad | 1087 | update_solib_list (from_tty); |
07cd4b97 | 1088 | |
4a2b031d TT |
1089 | /* ui_out_emit_table table_emitter needs to know the number of rows, |
1090 | so we need to make two passes over the libs. */ | |
55333a84 | 1091 | |
a1fd1ac9 TT |
1092 | nr_libs = 0; |
1093 | for (struct so_list *so : current_program_space->solibs ()) | |
c906108c | 1094 | { |
c5aa993b | 1095 | if (so->so_name[0]) |
c906108c | 1096 | { |
55333a84 DE |
1097 | if (pattern && ! re_exec (so->so_name)) |
1098 | continue; | |
1099 | ++nr_libs; | |
1100 | } | |
1101 | } | |
1102 | ||
4a2b031d TT |
1103 | { |
1104 | ui_out_emit_table table_emitter (uiout, 4, nr_libs, "SharedLibraryTable"); | |
55333a84 | 1105 | |
4a2b031d TT |
1106 | /* The "- 1" is because ui_out adds one space between columns. */ |
1107 | uiout->table_header (addr_width - 1, ui_left, "from", "From"); | |
1108 | uiout->table_header (addr_width - 1, ui_left, "to", "To"); | |
1109 | uiout->table_header (12 - 1, ui_left, "syms-read", "Syms Read"); | |
1110 | uiout->table_header (0, ui_noalign, "name", "Shared Object Library"); | |
55333a84 | 1111 | |
4a2b031d | 1112 | uiout->table_body (); |
55333a84 | 1113 | |
a1fd1ac9 | 1114 | for (struct so_list *so : current_program_space->solibs ()) |
4a2b031d TT |
1115 | { |
1116 | if (! so->so_name[0]) | |
1117 | continue; | |
1118 | if (pattern && ! re_exec (so->so_name)) | |
1119 | continue; | |
1120 | ||
1121 | ui_out_emit_tuple tuple_emitter (uiout, "lib"); | |
1122 | ||
1123 | if (so->addr_high != 0) | |
1124 | { | |
1125 | uiout->field_core_addr ("from", gdbarch, so->addr_low); | |
1126 | uiout->field_core_addr ("to", gdbarch, so->addr_high); | |
1127 | } | |
1128 | else | |
1129 | { | |
1130 | uiout->field_skip ("from"); | |
1131 | uiout->field_skip ("to"); | |
1132 | } | |
1133 | ||
29f94340 | 1134 | if (! top_level_interpreter ()->interp_ui_out ()->is_mi_like_p () |
4a2b031d TT |
1135 | && so->symbols_loaded |
1136 | && !objfile_has_symbols (so->objfile)) | |
1137 | { | |
5b89c67a | 1138 | so_missing_debug_info = true; |
4a2b031d TT |
1139 | uiout->field_string ("syms-read", "Yes (*)"); |
1140 | } | |
1141 | else | |
1142 | uiout->field_string ("syms-read", so->symbols_loaded ? "Yes" : "No"); | |
1143 | ||
e43b10e1 | 1144 | uiout->field_string ("name", so->so_name, file_name_style.style ()); |
4a2b031d TT |
1145 | |
1146 | uiout->text ("\n"); | |
1147 | } | |
1148 | } | |
55333a84 DE |
1149 | |
1150 | if (nr_libs == 0) | |
1151 | { | |
1152 | if (pattern) | |
112e8700 | 1153 | uiout->message (_("No shared libraries matched.\n")); |
55333a84 | 1154 | else |
112e8700 | 1155 | uiout->message (_("No shared libraries loaded at this time.\n")); |
55333a84 DE |
1156 | } |
1157 | else | |
c906108c | 1158 | { |
55333a84 | 1159 | if (so_missing_debug_info) |
112e8700 | 1160 | uiout->message (_("(*): Shared library is missing " |
3e43a32a | 1161 | "debugging information.\n")); |
c906108c SS |
1162 | } |
1163 | } | |
1164 | ||
5b89c67a | 1165 | /* See solib.h. */ |
5fd1a349 | 1166 | |
5b89c67a | 1167 | bool |
5fd1a349 PP |
1168 | solib_contains_address_p (const struct so_list *const solib, |
1169 | CORE_ADDR address) | |
1170 | { | |
76547ab3 TV |
1171 | if (solib->sections == nullptr) |
1172 | return false; | |
1173 | ||
d7a78e5c | 1174 | for (target_section &p : *solib->sections) |
bb2a6777 | 1175 | if (p.addr <= address && address < p.endaddr) |
5b89c67a | 1176 | return true; |
5fd1a349 | 1177 | |
5b89c67a | 1178 | return false; |
5fd1a349 PP |
1179 | } |
1180 | ||
7f86f058 PA |
1181 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1182 | name. | |
c906108c | 1183 | |
7f86f058 PA |
1184 | Provides a hook for other gdb routines to discover whether or not a |
1185 | particular address is within the mapped address space of a shared | |
1186 | library. | |
c906108c | 1187 | |
c5aa993b JM |
1188 | For example, this routine is called at one point to disable |
1189 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1190 | mapped in. */ |
c906108c | 1191 | |
6d08aed3 | 1192 | const char * |
6c95b8df | 1193 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1194 | { |
6c95b8df | 1195 | struct so_list *so = NULL; |
c5aa993b | 1196 | |
6c95b8df | 1197 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1198 | if (solib_contains_address_p (so, address)) |
1199 | return (so->so_name); | |
07cd4b97 | 1200 | |
c906108c SS |
1201 | return (0); |
1202 | } | |
1203 | ||
5b89c67a | 1204 | /* See solib.h. */ |
de18c1d8 | 1205 | |
5b89c67a | 1206 | bool |
de18c1d8 JM |
1207 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) |
1208 | { | |
9e468e95 | 1209 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
de18c1d8 JM |
1210 | |
1211 | if (ops->keep_data_in_core) | |
5b89c67a | 1212 | return ops->keep_data_in_core (vaddr, size) != 0; |
de18c1d8 | 1213 | else |
5b89c67a | 1214 | return false; |
de18c1d8 JM |
1215 | } |
1216 | ||
c906108c SS |
1217 | /* Called by free_all_symtabs */ |
1218 | ||
c5aa993b | 1219 | void |
fba45db2 | 1220 | clear_solib (void) |
c906108c | 1221 | { |
9e468e95 | 1222 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
66aba65d | 1223 | |
1736a7bd | 1224 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1225 | |
a1fd1ac9 | 1226 | while (current_program_space->so_list) |
c906108c | 1227 | { |
a1fd1ac9 | 1228 | struct so_list *so = current_program_space->so_list; |
433759f7 | 1229 | |
a1fd1ac9 | 1230 | current_program_space->so_list = so->next; |
76727919 | 1231 | gdb::observers::solib_unloaded.notify (so); |
2a3f84af | 1232 | current_program_space->remove_target_sections (so); |
07cd4b97 | 1233 | free_so (so); |
c906108c | 1234 | } |
07cd4b97 | 1235 | |
66aba65d | 1236 | ops->clear_solib (); |
c906108c SS |
1237 | } |
1238 | ||
7f86f058 PA |
1239 | /* Shared library startup support. When GDB starts up the inferior, |
1240 | it nurses it along (through the shell) until it is ready to execute | |
1241 | its first instruction. At this point, this function gets | |
1242 | called. */ | |
c5aa993b JM |
1243 | |
1244 | void | |
268a4a75 | 1245 | solib_create_inferior_hook (int from_tty) |
c906108c | 1246 | { |
9e468e95 | 1247 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
433759f7 | 1248 | |
268a4a75 | 1249 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1250 | } |
1251 | ||
5b89c67a | 1252 | /* See solib.h. */ |
d7fa2ae2 | 1253 | |
5b89c67a | 1254 | bool |
d7fa2ae2 KB |
1255 | in_solib_dynsym_resolve_code (CORE_ADDR pc) |
1256 | { | |
9e468e95 | 1257 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
433759f7 | 1258 | |
5b89c67a | 1259 | return ops->in_dynsym_resolve_code (pc) != 0; |
d7fa2ae2 | 1260 | } |
c906108c | 1261 | |
7f86f058 | 1262 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1263 | |
1264 | static void | |
0b39b52e | 1265 | sharedlibrary_command (const char *args, int from_tty) |
c906108c SS |
1266 | { |
1267 | dont_repeat (); | |
e696b3ad | 1268 | solib_add (args, from_tty, 1); |
c906108c SS |
1269 | } |
1270 | ||
7f86f058 | 1271 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1272 | that have been auto-loaded from shared libraries. Symbols from |
1273 | shared libraries that were added by explicit request of the user | |
1274 | are not discarded. Also called from remote.c. */ | |
1275 | ||
c60a7562 | 1276 | void |
0b39b52e | 1277 | no_shared_libraries (const char *ignored, int from_tty) |
c60a7562 | 1278 | { |
a3247a22 PP |
1279 | /* The order of the two routines below is important: clear_solib notifies |
1280 | the solib_unloaded observers, and some of these observers might need | |
1281 | access to their associated objfiles. Therefore, we can not purge the | |
1282 | solibs' objfiles before clear_solib has been called. */ | |
1283 | ||
615b9dba | 1284 | clear_solib (); |
a3247a22 | 1285 | objfile_purge_solibs (); |
c60a7562 | 1286 | } |
c906108c | 1287 | |
f9e14852 GB |
1288 | /* See solib.h. */ |
1289 | ||
1290 | void | |
1291 | update_solib_breakpoints (void) | |
1292 | { | |
9e468e95 | 1293 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
f9e14852 GB |
1294 | |
1295 | if (ops->update_breakpoints != NULL) | |
1296 | ops->update_breakpoints (); | |
1297 | } | |
1298 | ||
1299 | /* See solib.h. */ | |
1300 | ||
1301 | void | |
1302 | handle_solib_event (void) | |
1303 | { | |
9e468e95 | 1304 | const struct target_so_ops *ops = gdbarch_so_ops (target_gdbarch ()); |
f9e14852 GB |
1305 | |
1306 | if (ops->handle_event != NULL) | |
1307 | ops->handle_event (); | |
1308 | ||
e39fb971 | 1309 | current_inferior ()->pspace->clear_solib_cache (); |
f9e14852 GB |
1310 | |
1311 | /* Check for any newly added shared libraries if we're supposed to | |
1312 | be adding them automatically. Switch terminal for any messages | |
1313 | produced by breakpoint_re_set. */ | |
223ffa71 | 1314 | target_terminal::ours_for_output (); |
e696b3ad | 1315 | solib_add (NULL, 0, auto_solib_add); |
223ffa71 | 1316 | target_terminal::inferior (); |
f9e14852 GB |
1317 | } |
1318 | ||
a86988f2 PA |
1319 | /* Reload shared libraries, but avoid reloading the same symbol file |
1320 | we already have loaded. */ | |
1321 | ||
1322 | static void | |
1323 | reload_shared_libraries_1 (int from_tty) | |
1324 | { | |
770e7fc7 | 1325 | if (print_symbol_loading_p (from_tty, 0, 0)) |
6cb06a8c | 1326 | gdb_printf (_("Loading symbols for shared libraries.\n")); |
770e7fc7 | 1327 | |
a1fd1ac9 | 1328 | for (struct so_list *so : current_program_space->solibs ()) |
a86988f2 | 1329 | { |
b16c44de | 1330 | const char *found_pathname = NULL; |
5b89c67a | 1331 | bool was_loaded = so->symbols_loaded != 0; |
b15cc25c PA |
1332 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1333 | ||
1334 | if (from_tty) | |
1335 | add_flags |= SYMFILE_VERBOSE; | |
a86988f2 | 1336 | |
ee0c3293 TT |
1337 | gdb::unique_xmalloc_ptr<char> filename |
1338 | (tilde_expand (so->so_original_name)); | |
1339 | gdb_bfd_ref_ptr abfd (solib_bfd_open (filename.get ())); | |
a86988f2 | 1340 | if (abfd != NULL) |
ee0c3293 | 1341 | found_pathname = bfd_get_filename (abfd.get ()); |
a86988f2 PA |
1342 | |
1343 | /* If this shared library is no longer associated with its previous | |
1344 | symbol file, close that. */ | |
1345 | if ((found_pathname == NULL && was_loaded) | |
1346 | || (found_pathname != NULL | |
0ba1096a | 1347 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1348 | { |
59145f8c AR |
1349 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1350 | && !solib_used (so)) | |
268e4f09 | 1351 | so->objfile->unlink (); |
2a3f84af | 1352 | current_program_space->remove_target_sections (so); |
0892cb63 | 1353 | clear_so (so); |
a86988f2 PA |
1354 | } |
1355 | ||
1356 | /* If this shared library is now associated with a new symbol | |
1357 | file, open it. */ | |
1358 | if (found_pathname != NULL | |
1359 | && (!was_loaded | |
0ba1096a | 1360 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1361 | { |
5b89c67a | 1362 | bool got_error = false; |
a86988f2 | 1363 | |
a70b8144 | 1364 | try |
492d29ea PA |
1365 | { |
1366 | solib_map_sections (so); | |
1367 | } | |
1368 | ||
230d2906 | 1369 | catch (const gdb_exception_error &e) |
492d29ea PA |
1370 | { |
1371 | exception_fprintf (gdb_stderr, e, | |
1372 | _("Error while mapping " | |
1373 | "shared library sections:\n")); | |
5b89c67a | 1374 | got_error = true; |
492d29ea | 1375 | } |
a86988f2 | 1376 | |
492d29ea PA |
1377 | if (!got_error |
1378 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
b15cc25c | 1379 | solib_read_symbols (so, add_flags); |
a86988f2 PA |
1380 | } |
1381 | } | |
a86988f2 PA |
1382 | } |
1383 | ||
cf466558 | 1384 | static void |
eb4c3f4a | 1385 | reload_shared_libraries (const char *ignored, int from_tty, |
f397e303 | 1386 | struct cmd_list_element *e) |
cf466558 | 1387 | { |
3641da11 | 1388 | const struct target_so_ops *ops; |
a86988f2 PA |
1389 | |
1390 | reload_shared_libraries_1 (from_tty); | |
1391 | ||
9e468e95 | 1392 | ops = gdbarch_so_ops (target_gdbarch ()); |
a86988f2 | 1393 | |
c378eb4e | 1394 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1395 | shared libraries then the address of solib breakpoint we've computed |
1396 | previously might be no longer valid. For example, if we forgot to set | |
1397 | solib-absolute-prefix and are setting it right now, then the previous | |
1398 | breakpoint address is plain wrong. Second, installing solib hooks | |
1399 | also implicitly figures were ld.so is and loads symbols for it. | |
1400 | Absent this call, if we've just connected to a target and set | |
1401 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1402 | about ld.so. */ | |
55f6301a | 1403 | if (target_has_execution ()) |
c8fa6cdd | 1404 | { |
a86988f2 PA |
1405 | /* Reset or free private data structures not associated with |
1406 | so_list entries. */ | |
1407 | ops->clear_solib (); | |
1408 | ||
1409 | /* Remove any previous solib event breakpoint. This is usually | |
1410 | done in common code, at breakpoint_init_inferior time, but | |
1411 | we're not really starting up the inferior here. */ | |
1412 | remove_solib_event_breakpoints (); | |
1413 | ||
268a4a75 | 1414 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1415 | } |
268a4a75 JK |
1416 | |
1417 | /* Sometimes the platform-specific hook loads initial shared | |
1418 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1419 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1420 | made all the inferior hook methods consistent, this call could be | |
1421 | removed. Call it only after the solib target has been initialized by | |
1422 | solib_create_inferior_hook. */ | |
1423 | ||
e696b3ad | 1424 | solib_add (NULL, 0, auto_solib_add); |
268a4a75 | 1425 | |
a86988f2 PA |
1426 | breakpoint_re_set (); |
1427 | ||
1428 | /* We may have loaded or unloaded debug info for some (or all) | |
1429 | shared libraries. However, frames may still reference them. For | |
1430 | example, a frame's unwinder might still point at DWARF FDE | |
1431 | structures that are now freed. Also, getting new symbols may | |
1432 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1433 | reinit_frame_cache (); |
cf466558 KB |
1434 | } |
1435 | ||
2938e6cf GB |
1436 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1437 | at the start of gdb_sysroot with "target:". */ | |
1438 | ||
1439 | static void | |
eb4c3f4a | 1440 | gdb_sysroot_changed (const char *ignored, int from_tty, |
2938e6cf GB |
1441 | struct cmd_list_element *e) |
1442 | { | |
1443 | const char *old_prefix = "remote:"; | |
1444 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1445 | ||
e0700ba4 | 1446 | if (startswith (gdb_sysroot.c_str (), old_prefix)) |
2938e6cf | 1447 | { |
5b89c67a | 1448 | static bool warning_issued = false; |
2938e6cf GB |
1449 | |
1450 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
e0700ba4 | 1451 | gdb_sysroot = new_prefix + gdb_sysroot.substr (strlen (old_prefix)); |
2938e6cf GB |
1452 | |
1453 | if (!warning_issued) | |
1454 | { | |
1455 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1456 | old_prefix, new_prefix); | |
e0700ba4 | 1457 | warning (_("sysroot set to \"%s\"."), gdb_sysroot.c_str ()); |
2938e6cf | 1458 | |
5b89c67a | 1459 | warning_issued = true; |
2938e6cf GB |
1460 | } |
1461 | } | |
1462 | ||
1463 | reload_shared_libraries (ignored, from_tty, e); | |
1464 | } | |
1465 | ||
920d2a44 AC |
1466 | static void |
1467 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1468 | struct cmd_list_element *c, const char *value) | |
1469 | { | |
6cb06a8c TT |
1470 | gdb_printf (file, _("Autoloading of shared library symbols is %s.\n"), |
1471 | value); | |
920d2a44 AC |
1472 | } |
1473 | ||
1474 | ||
cb457ae2 YQ |
1475 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1476 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1477 | whether to pick up a symbol. DATA is the input of this callback | |
1478 | function. Return NULL if symbol is not found. */ | |
1479 | ||
1480 | CORE_ADDR | |
1481 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
3953f15c SM |
1482 | int (*match_sym) (const asymbol *, |
1483 | const void *), | |
1484 | const void *data) | |
cb457ae2 YQ |
1485 | { |
1486 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1487 | CORE_ADDR symaddr = 0; | |
1488 | ||
1489 | if (storage_needed > 0) | |
1490 | { | |
1491 | unsigned int i; | |
1492 | ||
1cb1f3da TT |
1493 | gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *)); |
1494 | asymbol **symbol_table = storage.data (); | |
cb457ae2 YQ |
1495 | unsigned int number_of_symbols = |
1496 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1497 | ||
1498 | for (i = 0; i < number_of_symbols; i++) | |
1499 | { | |
1500 | asymbol *sym = *symbol_table++; | |
1501 | ||
1502 | if (match_sym (sym, data)) | |
1503 | { | |
3e29f34a MR |
1504 | struct gdbarch *gdbarch = target_gdbarch (); |
1505 | symaddr = sym->value; | |
1506 | ||
1507 | /* Some ELF targets fiddle with addresses of symbols they | |
dda83cd7 SM |
1508 | consider special. They use minimal symbols to do that |
1509 | and this is needed for correct breakpoint placement, | |
1510 | but we do not have full data here to build a complete | |
1511 | minimal symbol, so just set the address and let the | |
1512 | targets cope with that. */ | |
3e29f34a MR |
1513 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
1514 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1515 | { | |
eefba3da | 1516 | struct minimal_symbol msym {}; |
3e29f34a | 1517 | |
4aeddc50 | 1518 | msym.set_value_address (symaddr); |
3e29f34a | 1519 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); |
4aeddc50 | 1520 | symaddr = msym.value_raw_address (); |
3e29f34a MR |
1521 | } |
1522 | ||
cb457ae2 | 1523 | /* BFD symbols are section relative. */ |
3e29f34a | 1524 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1525 | break; |
1526 | } | |
1527 | } | |
cb457ae2 YQ |
1528 | } |
1529 | ||
1530 | return symaddr; | |
1531 | } | |
1532 | ||
8ddf4645 AM |
1533 | /* See solib.h. */ |
1534 | ||
1535 | int | |
1536 | gdb_bfd_scan_elf_dyntag (const int desired_dyntag, bfd *abfd, CORE_ADDR *ptr, | |
1537 | CORE_ADDR *ptr_addr) | |
1538 | { | |
1539 | int arch_size, step, sect_size; | |
1540 | long current_dyntag; | |
1541 | CORE_ADDR dyn_ptr, dyn_addr; | |
1542 | gdb_byte *bufend, *bufstart, *buf; | |
1543 | Elf32_External_Dyn *x_dynp_32; | |
1544 | Elf64_External_Dyn *x_dynp_64; | |
1545 | struct bfd_section *sect; | |
1546 | ||
1547 | if (abfd == NULL) | |
1548 | return 0; | |
1549 | ||
1550 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
1551 | return 0; | |
1552 | ||
1553 | arch_size = bfd_get_arch_size (abfd); | |
1554 | if (arch_size == -1) | |
1555 | return 0; | |
1556 | ||
1557 | /* Find the start address of the .dynamic section. */ | |
1558 | sect = bfd_get_section_by_name (abfd, ".dynamic"); | |
1559 | if (sect == NULL) | |
1560 | return 0; | |
1561 | ||
1562 | bool found = false; | |
1563 | for (const target_section &target_section | |
1564 | : current_program_space->target_sections ()) | |
1565 | if (sect == target_section.the_bfd_section) | |
1566 | { | |
1567 | dyn_addr = target_section.addr; | |
1568 | found = true; | |
1569 | break; | |
1570 | } | |
1571 | if (!found) | |
1572 | { | |
1573 | /* ABFD may come from OBJFILE acting only as a symbol file without being | |
1574 | loaded into the target (see add_symbol_file_command). This case is | |
1575 | such fallback to the file VMA address without the possibility of | |
1576 | having the section relocated to its actual in-memory address. */ | |
1577 | ||
1578 | dyn_addr = bfd_section_vma (sect); | |
1579 | } | |
1580 | ||
1581 | /* Read in .dynamic from the BFD. We will get the actual value | |
1582 | from memory later. */ | |
1583 | sect_size = bfd_section_size (sect); | |
1584 | buf = bufstart = (gdb_byte *) alloca (sect_size); | |
1585 | if (!bfd_get_section_contents (abfd, sect, | |
1586 | buf, 0, sect_size)) | |
1587 | return 0; | |
1588 | ||
1589 | /* Iterate over BUF and scan for DYNTAG. If found, set PTR and return. */ | |
1590 | step = (arch_size == 32) ? sizeof (Elf32_External_Dyn) | |
1591 | : sizeof (Elf64_External_Dyn); | |
1592 | for (bufend = buf + sect_size; | |
1593 | buf < bufend; | |
1594 | buf += step) | |
1595 | { | |
1596 | if (arch_size == 32) | |
1597 | { | |
1598 | x_dynp_32 = (Elf32_External_Dyn *) buf; | |
1599 | current_dyntag = bfd_h_get_32 (abfd, (bfd_byte *) x_dynp_32->d_tag); | |
1600 | dyn_ptr = bfd_h_get_32 (abfd, (bfd_byte *) x_dynp_32->d_un.d_ptr); | |
1601 | } | |
1602 | else | |
1603 | { | |
1604 | x_dynp_64 = (Elf64_External_Dyn *) buf; | |
1605 | current_dyntag = bfd_h_get_64 (abfd, (bfd_byte *) x_dynp_64->d_tag); | |
1606 | dyn_ptr = bfd_h_get_64 (abfd, (bfd_byte *) x_dynp_64->d_un.d_ptr); | |
1607 | } | |
1608 | if (current_dyntag == DT_NULL) | |
1609 | return 0; | |
1610 | if (current_dyntag == desired_dyntag) | |
1611 | { | |
1612 | /* If requested, try to read the runtime value of this .dynamic | |
1613 | entry. */ | |
1614 | if (ptr) | |
1615 | { | |
1616 | struct type *ptr_type; | |
1617 | gdb_byte ptr_buf[8]; | |
1618 | CORE_ADDR ptr_addr_1; | |
1619 | ||
1620 | ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
1621 | ptr_addr_1 = dyn_addr + (buf - bufstart) + arch_size / 8; | |
1622 | if (target_read_memory (ptr_addr_1, ptr_buf, arch_size / 8) == 0) | |
1623 | dyn_ptr = extract_typed_address (ptr_buf, ptr_type); | |
1624 | *ptr = dyn_ptr; | |
1625 | if (ptr_addr) | |
1626 | *ptr_addr = dyn_addr + (buf - bufstart); | |
1627 | } | |
1628 | return 1; | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | return 0; | |
1633 | } | |
1634 | ||
39f53acb AM |
1635 | /* See solib.h. */ |
1636 | ||
1637 | gdb::unique_xmalloc_ptr<char> | |
1638 | gdb_bfd_read_elf_soname (const char *filename) | |
1639 | { | |
1640 | gdb_bfd_ref_ptr abfd = gdb_bfd_open (filename, gnutarget); | |
1641 | ||
1642 | if (abfd == nullptr) | |
1643 | return {}; | |
1644 | ||
1645 | /* Check that ABFD is an ET_DYN ELF file. */ | |
1646 | if (!bfd_check_format (abfd.get (), bfd_object) | |
1647 | || !(bfd_get_file_flags (abfd.get ()) & DYNAMIC)) | |
1648 | return {}; | |
1649 | ||
1650 | CORE_ADDR idx; | |
1651 | if (!gdb_bfd_scan_elf_dyntag (DT_SONAME, abfd.get (), &idx, nullptr)) | |
1652 | return {}; | |
1653 | ||
1654 | struct bfd_section *dynstr = bfd_get_section_by_name (abfd.get (), ".dynstr"); | |
1655 | int sect_size = bfd_section_size (dynstr); | |
1656 | if (dynstr == nullptr || sect_size <= idx) | |
1657 | return {}; | |
1658 | ||
1659 | /* Read soname from the string table. */ | |
1660 | gdb::byte_vector dynstr_buf; | |
1661 | if (!gdb_bfd_get_full_section_contents (abfd.get (), dynstr, &dynstr_buf)) | |
1662 | return {}; | |
1663 | ||
1664 | /* Ensure soname is null-terminated before returning a copy. */ | |
1665 | char *soname = (char *) dynstr_buf.data () + idx; | |
1666 | if (strnlen (soname, sect_size - idx) == sect_size - idx) | |
1667 | return {}; | |
1668 | ||
1669 | return make_unique_xstrdup (soname); | |
1670 | } | |
1671 | ||
cb457ae2 YQ |
1672 | /* Lookup the value for a specific symbol from symbol table. Look up symbol |
1673 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1674 | up a symbol. DATA is the input of this callback function. Return NULL | |
1675 | if symbol is not found. */ | |
1676 | ||
1677 | static CORE_ADDR | |
1678 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
3953f15c SM |
1679 | int (*match_sym) (const asymbol *, |
1680 | const void *), | |
1681 | const void *data) | |
cb457ae2 YQ |
1682 | { |
1683 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1684 | CORE_ADDR symaddr = 0; | |
1685 | ||
1686 | if (storage_needed > 0) | |
1687 | { | |
1688 | unsigned int i; | |
1cb1f3da TT |
1689 | gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *)); |
1690 | asymbol **symbol_table = storage.data (); | |
cb457ae2 YQ |
1691 | unsigned int number_of_symbols = |
1692 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1693 | ||
1694 | for (i = 0; i < number_of_symbols; i++) | |
1695 | { | |
1696 | asymbol *sym = *symbol_table++; | |
1697 | ||
1698 | if (match_sym (sym, data)) | |
1699 | { | |
1700 | /* BFD symbols are section relative. */ | |
1701 | symaddr = sym->value + sym->section->vma; | |
1702 | break; | |
1703 | } | |
1704 | } | |
cb457ae2 YQ |
1705 | } |
1706 | return symaddr; | |
1707 | } | |
1708 | ||
1709 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1710 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1711 | function to determine whether to pick up a symbol. DATA is the | |
1712 | input of this callback function. Return NULL if symbol is not | |
1713 | found. */ | |
1714 | ||
1715 | CORE_ADDR | |
1716 | gdb_bfd_lookup_symbol (bfd *abfd, | |
3953f15c SM |
1717 | int (*match_sym) (const asymbol *, const void *), |
1718 | const void *data) | |
cb457ae2 YQ |
1719 | { |
1720 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1721 | ||
1722 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1723 | have to check the dynamic string table too. */ | |
1724 | if (symaddr == 0) | |
1725 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1726 | ||
1727 | return symaddr; | |
1728 | } | |
3a40aaa0 | 1729 | |
a1fd1ac9 TT |
1730 | /* The shared library list may contain user-loaded object files that |
1731 | can be removed out-of-band by the user. So upon notification of | |
1732 | free_objfile remove all references to any user-loaded file that is | |
1733 | about to be freed. */ | |
63644780 NB |
1734 | |
1735 | static void | |
1736 | remove_user_added_objfile (struct objfile *objfile) | |
1737 | { | |
63644780 NB |
1738 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) |
1739 | { | |
a1fd1ac9 | 1740 | for (struct so_list *so : current_program_space->solibs ()) |
63644780 NB |
1741 | if (so->objfile == objfile) |
1742 | so->objfile = NULL; | |
1743 | } | |
1744 | } | |
1745 | ||
6c265988 | 1746 | void _initialize_solib (); |
c906108c | 1747 | void |
6c265988 | 1748 | _initialize_solib () |
c906108c | 1749 | { |
c90e7d63 SM |
1750 | gdb::observers::free_objfile.attach (remove_user_added_objfile, |
1751 | "solib"); | |
42a4fec5 SM |
1752 | gdb::observers::inferior_execd.attach ([] (inferior *inf) |
1753 | { | |
1754 | solib_create_inferior_hook (0); | |
c90e7d63 | 1755 | }, "solib"); |
63644780 | 1756 | |
c906108c | 1757 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1758 | _("Load shared object library symbols for files matching REGEXP.")); |
e0f25bd9 SM |
1759 | cmd_list_element *info_sharedlibrary_cmd |
1760 | = add_info ("sharedlibrary", info_sharedlibrary_command, | |
1761 | _("Status of loaded shared object libraries.")); | |
1762 | add_info_alias ("dll", info_sharedlibrary_cmd, 1); | |
c60a7562 | 1763 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1764 | _("Unload all shared object library symbols.")); |
c906108c | 1765 | |
5bf193a2 AC |
1766 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1767 | &auto_solib_add, _("\ | |
1768 | Set autoloading of shared library symbols."), _("\ | |
1769 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1770 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1771 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1772 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1773 | inferior. Otherwise, symbols must be loaded manually, using \ |
1774 | `sharedlibrary'."), | |
5bf193a2 | 1775 | NULL, |
920d2a44 | 1776 | show_auto_solib_add, |
5bf193a2 | 1777 | &setlist, &showlist); |
c906108c | 1778 | |
5e84b7ee SM |
1779 | set_show_commands sysroot_cmds |
1780 | = add_setshow_optional_filename_cmd ("sysroot", class_support, | |
1781 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1782 | Set an alternate system root."), _("\ |
1783 | Show the current system root."), _("\ | |
1784 | The system root is used to load absolute shared library symbol files.\n\ | |
1785 | For other (relative) files, you can add directories using\n\ | |
1786 | `set solib-search-path'."), | |
5e84b7ee SM |
1787 | gdb_sysroot_changed, |
1788 | NULL, | |
1789 | &setlist, &showlist); | |
c906108c | 1790 | |
5e84b7ee | 1791 | add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.set, class_support, 0, |
f822c95b | 1792 | &setlist); |
5e84b7ee | 1793 | add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.show, class_support, 0, |
f822c95b | 1794 | &showlist); |
030292b7 | 1795 | |
525226b5 AC |
1796 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1797 | &solib_search_path, _("\ | |
3e43a32a MS |
1798 | Set the search path for loading non-absolute shared library symbol files."), |
1799 | _("\ | |
1800 | Show the search path for loading non-absolute shared library symbol files."), | |
1801 | _("\ | |
1802 | This takes precedence over the environment variables \ | |
1803 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1804 | reload_shared_libraries, |
920d2a44 | 1805 | show_solib_search_path, |
525226b5 | 1806 | &setlist, &showlist); |
e26d0dab SM |
1807 | |
1808 | add_setshow_boolean_cmd ("solib", class_maintenance, | |
1809 | &debug_solib, _("\ | |
1810 | Set solib debugging."), _("\ | |
1811 | Show solib debugging."), _("\ | |
1812 | When true, solib-related debugging output is enabled."), | |
1813 | nullptr, nullptr, | |
1814 | &setdebuglist, &showdebuglist); | |
c906108c | 1815 | } |