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14ed0a8b RM |
1 | /* Auxiliary vector support for GDB, the GNU debugger. |
2 | ||
213516ef | 3 | Copyright (C) 2004-2023 Free Software Foundation, Inc. |
14ed0a8b RM |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 |
14ed0a8b RM |
10 | (at your option) any later version. |
11 | ||
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/>. */ |
14ed0a8b RM |
19 | |
20 | #include "defs.h" | |
4de283e4 | 21 | #include "target.h" |
d55e5aa6 | 22 | #include "gdbtypes.h" |
4de283e4 | 23 | #include "command.h" |
d55e5aa6 | 24 | #include "inferior.h" |
d55e5aa6 | 25 | #include "valprint.h" |
4de283e4 TT |
26 | #include "gdbcore.h" |
27 | #include "observable.h" | |
268a13a5 | 28 | #include "gdbsupport/filestuff.h" |
4de283e4 TT |
29 | #include "objfiles.h" |
30 | ||
31 | #include "auxv.h" | |
32 | #include "elf/common.h" | |
33 | ||
34 | #include <unistd.h> | |
35 | #include <fcntl.h> | |
14ed0a8b RM |
36 | |
37 | ||
edcc890f YQ |
38 | /* Implement the to_xfer_partial target_ops method. This function |
39 | handles access via /proc/PID/auxv, which is a common method for | |
40 | native targets. */ | |
14ed0a8b | 41 | |
9b409511 | 42 | static enum target_xfer_status |
9f2982ff | 43 | procfs_xfer_auxv (gdb_byte *readbuf, |
36aa5e41 | 44 | const gdb_byte *writebuf, |
14ed0a8b | 45 | ULONGEST offset, |
9b409511 YQ |
46 | ULONGEST len, |
47 | ULONGEST *xfered_len) | |
14ed0a8b | 48 | { |
9b409511 | 49 | ssize_t l; |
14ed0a8b | 50 | |
528e1572 | 51 | std::string pathname = string_printf ("/proc/%d/auxv", inferior_ptid.pid ()); |
13084383 SM |
52 | scoped_fd fd |
53 | = gdb_open_cloexec (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY, 0); | |
54 | if (fd.get () < 0) | |
2ed4b548 | 55 | return TARGET_XFER_E_IO; |
14ed0a8b RM |
56 | |
57 | if (offset != (ULONGEST) 0 | |
13084383 | 58 | && lseek (fd.get (), (off_t) offset, SEEK_SET) != (off_t) offset) |
9b409511 | 59 | l = -1; |
14ed0a8b | 60 | else if (readbuf != NULL) |
13084383 | 61 | l = read (fd.get (), readbuf, (size_t) len); |
14ed0a8b | 62 | else |
13084383 | 63 | l = write (fd.get (), writebuf, (size_t) len); |
14ed0a8b | 64 | |
9b409511 YQ |
65 | if (l < 0) |
66 | return TARGET_XFER_E_IO; | |
67 | else if (l == 0) | |
68 | return TARGET_XFER_EOF; | |
69 | else | |
70 | { | |
71 | *xfered_len = (ULONGEST) l; | |
72 | return TARGET_XFER_OK; | |
73 | } | |
14ed0a8b RM |
74 | } |
75 | ||
9f2982ff JK |
76 | /* This function handles access via ld.so's symbol `_dl_auxv'. */ |
77 | ||
9b409511 | 78 | static enum target_xfer_status |
9f2982ff JK |
79 | ld_so_xfer_auxv (gdb_byte *readbuf, |
80 | const gdb_byte *writebuf, | |
81 | ULONGEST offset, | |
9b409511 | 82 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff | 83 | { |
3b7344d5 | 84 | struct bound_minimal_symbol msym; |
9f2982ff | 85 | CORE_ADDR data_address, pointer_address; |
f5656ead | 86 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
df86565b | 87 | size_t ptr_size = ptr_type->length (); |
9f2982ff | 88 | size_t auxv_pair_size = 2 * ptr_size; |
224c3ddb | 89 | gdb_byte *ptr_buf = (gdb_byte *) alloca (ptr_size); |
9f2982ff JK |
90 | LONGEST retval; |
91 | size_t block; | |
92 | ||
93 | msym = lookup_minimal_symbol ("_dl_auxv", NULL, NULL); | |
3b7344d5 | 94 | if (msym.minsym == NULL) |
2ed4b548 | 95 | return TARGET_XFER_E_IO; |
9f2982ff | 96 | |
5bbfd12d | 97 | if (msym.minsym->size () != ptr_size) |
2ed4b548 | 98 | return TARGET_XFER_E_IO; |
9f2982ff | 99 | |
0e2de366 MS |
100 | /* POINTER_ADDRESS is a location where the `_dl_auxv' variable |
101 | resides. DATA_ADDRESS is the inferior value present in | |
102 | `_dl_auxv', therefore the real inferior AUXV address. */ | |
9f2982ff | 103 | |
4aeddc50 | 104 | pointer_address = msym.value_address (); |
9f2982ff | 105 | |
3cd07d20 | 106 | /* The location of the _dl_auxv symbol may no longer be correct if |
0e2de366 MS |
107 | ld.so runs at a different address than the one present in the |
108 | file. This is very common case - for unprelinked ld.so or with a | |
109 | PIE executable. PIE executable forces random address even for | |
110 | libraries already being prelinked to some address. PIE | |
111 | executables themselves are never prelinked even on prelinked | |
112 | systems. Prelinking of a PIE executable would block their | |
113 | purpose of randomizing load of everything including the | |
114 | executable. | |
115 | ||
116 | If the memory read fails, return -1 to fallback on another | |
117 | mechanism for retrieving the AUXV. | |
118 | ||
119 | In most cases of a PIE running under valgrind there is no way to | |
120 | find out the base addresses of any of ld.so, executable or AUXV | |
121 | as everything is randomized and /proc information is not relevant | |
122 | for the virtual executable running under valgrind. We think that | |
123 | we might need a valgrind extension to make it work. This is PR | |
124 | 11440. */ | |
3cd07d20 JK |
125 | |
126 | if (target_read_memory (pointer_address, ptr_buf, ptr_size) != 0) | |
2ed4b548 | 127 | return TARGET_XFER_E_IO; |
3cd07d20 JK |
128 | |
129 | data_address = extract_typed_address (ptr_buf, ptr_type); | |
9f2982ff | 130 | |
0e2de366 MS |
131 | /* Possibly still not initialized such as during an inferior |
132 | startup. */ | |
9f2982ff | 133 | if (data_address == 0) |
2ed4b548 | 134 | return TARGET_XFER_E_IO; |
9f2982ff JK |
135 | |
136 | data_address += offset; | |
137 | ||
138 | if (writebuf != NULL) | |
139 | { | |
140 | if (target_write_memory (data_address, writebuf, len) == 0) | |
9b409511 YQ |
141 | { |
142 | *xfered_len = (ULONGEST) len; | |
143 | return TARGET_XFER_OK; | |
144 | } | |
9f2982ff | 145 | else |
2ed4b548 | 146 | return TARGET_XFER_E_IO; |
9f2982ff JK |
147 | } |
148 | ||
0e2de366 MS |
149 | /* Stop if trying to read past the existing AUXV block. The final |
150 | AT_NULL was already returned before. */ | |
9f2982ff JK |
151 | |
152 | if (offset >= auxv_pair_size) | |
153 | { | |
154 | if (target_read_memory (data_address - auxv_pair_size, ptr_buf, | |
155 | ptr_size) != 0) | |
2ed4b548 | 156 | return TARGET_XFER_E_IO; |
9f2982ff JK |
157 | |
158 | if (extract_typed_address (ptr_buf, ptr_type) == AT_NULL) | |
9b409511 | 159 | return TARGET_XFER_EOF; |
9f2982ff JK |
160 | } |
161 | ||
162 | retval = 0; | |
163 | block = 0x400; | |
164 | gdb_assert (block % auxv_pair_size == 0); | |
165 | ||
166 | while (len > 0) | |
167 | { | |
168 | if (block > len) | |
169 | block = len; | |
170 | ||
0e2de366 MS |
171 | /* Reading sizes smaller than AUXV_PAIR_SIZE is not supported. |
172 | Tails unaligned to AUXV_PAIR_SIZE will not be read during a | |
173 | call (they should be completed during next read with | |
174 | new/extended buffer). */ | |
9f2982ff JK |
175 | |
176 | block &= -auxv_pair_size; | |
177 | if (block == 0) | |
9b409511 | 178 | break; |
9f2982ff JK |
179 | |
180 | if (target_read_memory (data_address, readbuf, block) != 0) | |
181 | { | |
182 | if (block <= auxv_pair_size) | |
9b409511 | 183 | break; |
9f2982ff JK |
184 | |
185 | block = auxv_pair_size; | |
186 | continue; | |
187 | } | |
188 | ||
189 | data_address += block; | |
190 | len -= block; | |
191 | ||
0e2de366 | 192 | /* Check terminal AT_NULL. This function is being called |
dda83cd7 SM |
193 | indefinitely being extended its READBUF until it returns EOF |
194 | (0). */ | |
9f2982ff JK |
195 | |
196 | while (block >= auxv_pair_size) | |
197 | { | |
198 | retval += auxv_pair_size; | |
199 | ||
200 | if (extract_typed_address (readbuf, ptr_type) == AT_NULL) | |
9b409511 YQ |
201 | { |
202 | *xfered_len = (ULONGEST) retval; | |
203 | return TARGET_XFER_OK; | |
204 | } | |
9f2982ff JK |
205 | |
206 | readbuf += auxv_pair_size; | |
207 | block -= auxv_pair_size; | |
208 | } | |
209 | } | |
210 | ||
9b409511 YQ |
211 | *xfered_len = (ULONGEST) retval; |
212 | return TARGET_XFER_OK; | |
9f2982ff JK |
213 | } |
214 | ||
edcc890f YQ |
215 | /* Implement the to_xfer_partial target_ops method for |
216 | TARGET_OBJECT_AUXV. It handles access to AUXV. */ | |
9f2982ff | 217 | |
9b409511 | 218 | enum target_xfer_status |
9f2982ff JK |
219 | memory_xfer_auxv (struct target_ops *ops, |
220 | enum target_object object, | |
221 | const char *annex, | |
222 | gdb_byte *readbuf, | |
223 | const gdb_byte *writebuf, | |
224 | ULONGEST offset, | |
9b409511 | 225 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff JK |
226 | { |
227 | gdb_assert (object == TARGET_OBJECT_AUXV); | |
228 | gdb_assert (readbuf || writebuf); | |
229 | ||
0e2de366 MS |
230 | /* ld_so_xfer_auxv is the only function safe for virtual |
231 | executables being executed by valgrind's memcheck. Using | |
232 | ld_so_xfer_auxv during inferior startup is problematic, because | |
233 | ld.so symbol tables have not yet been relocated. So GDB uses | |
234 | this function only when attaching to a process. | |
86e4bafc | 235 | */ |
9f2982ff | 236 | |
30220b46 | 237 | if (current_inferior ()->attach_flag) |
9f2982ff | 238 | { |
9b409511 | 239 | enum target_xfer_status ret; |
9f2982ff | 240 | |
9b409511 YQ |
241 | ret = ld_so_xfer_auxv (readbuf, writebuf, offset, len, xfered_len); |
242 | if (ret != TARGET_XFER_E_IO) | |
243 | return ret; | |
9f2982ff JK |
244 | } |
245 | ||
9b409511 | 246 | return procfs_xfer_auxv (readbuf, writebuf, offset, len, xfered_len); |
9f2982ff JK |
247 | } |
248 | ||
206c98a6 KR |
249 | /* This function compared to other auxv_parse functions: it takes the size of |
250 | the auxv type field as a parameter. */ | |
251 | ||
252 | static int | |
3fe639b8 SM |
253 | generic_auxv_parse (struct gdbarch *gdbarch, const gdb_byte **readptr, |
254 | const gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp, | |
206c98a6 | 255 | int sizeof_auxv_type) |
14ed0a8b | 256 | { |
206c98a6 | 257 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
df86565b | 258 | const int sizeof_auxv_val = ptr_type->length (); |
206c98a6 | 259 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
3fe639b8 | 260 | const gdb_byte *ptr = *readptr; |
14ed0a8b RM |
261 | |
262 | if (endptr == ptr) | |
263 | return 0; | |
264 | ||
206c98a6 | 265 | if (endptr - ptr < 2 * sizeof_auxv_val) |
14ed0a8b RM |
266 | return -1; |
267 | ||
206c98a6 KR |
268 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order); |
269 | /* Even if the auxv type takes less space than an auxv value, there is | |
270 | padding after the type such that the value is aligned on a multiple of | |
271 | its size (and this is why we advance by `sizeof_auxv_val` and not | |
272 | `sizeof_auxv_type`). */ | |
273 | ptr += sizeof_auxv_val; | |
274 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order); | |
275 | ptr += sizeof_auxv_val; | |
14ed0a8b RM |
276 | |
277 | *readptr = ptr; | |
278 | return 1; | |
279 | } | |
280 | ||
206c98a6 KR |
281 | /* See auxv.h. */ |
282 | ||
283 | int | |
3fe639b8 SM |
284 | default_auxv_parse (struct target_ops *ops, const gdb_byte **readptr, |
285 | const gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
206c98a6 KR |
286 | { |
287 | struct gdbarch *gdbarch = target_gdbarch (); | |
288 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; | |
df86565b | 289 | const int sizeof_auxv_type = ptr_type->length (); |
206c98a6 KR |
290 | |
291 | return generic_auxv_parse (gdbarch, readptr, endptr, typep, valp, | |
292 | sizeof_auxv_type); | |
293 | } | |
294 | ||
295 | /* See auxv.h. */ | |
296 | ||
297 | int | |
3fe639b8 SM |
298 | svr4_auxv_parse (struct gdbarch *gdbarch, const gdb_byte **readptr, |
299 | const gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
206c98a6 KR |
300 | { |
301 | struct type *int_type = builtin_type (gdbarch)->builtin_int; | |
df86565b | 302 | const int sizeof_auxv_type = int_type->length (); |
206c98a6 KR |
303 | |
304 | return generic_auxv_parse (gdbarch, readptr, endptr, typep, valp, | |
305 | sizeof_auxv_type); | |
306 | } | |
307 | ||
c47ffbe3 | 308 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. |
7dce7881 | 309 | |
82d23ca8 SM |
310 | Use the auxv_parse method from GDBARCH, if defined, else use the auxv_parse |
311 | method of OPS. | |
7dce7881 | 312 | |
c47ffbe3 VP |
313 | Return 0 if *READPTR is already at the end of the buffer. |
314 | Return -1 if there is insufficient buffer for a whole entry. | |
315 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
82d23ca8 | 316 | |
7dce7881 | 317 | static int |
82d23ca8 SM |
318 | parse_auxv (target_ops *ops, gdbarch *gdbarch, const gdb_byte **readptr, |
319 | const gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 320 | { |
27a48a92 MK |
321 | if (gdbarch_auxv_parse_p (gdbarch)) |
322 | return gdbarch_auxv_parse (gdbarch, readptr, endptr, typep, valp); | |
323 | ||
82d23ca8 | 324 | return ops->auxv_parse (readptr, endptr, typep, valp); |
c47ffbe3 VP |
325 | } |
326 | ||
865ecab4 | 327 | |
865ecab4 LM |
328 | /* Auxiliary Vector information structure. This is used by GDB |
329 | for caching purposes for each inferior. This helps reduce the | |
330 | overhead of transfering data from a remote target to the local host. */ | |
331 | struct auxv_info | |
332 | { | |
9018be22 | 333 | gdb::optional<gdb::byte_vector> data; |
865ecab4 LM |
334 | }; |
335 | ||
e9b89e2d | 336 | /* Per-inferior data key for auxv. */ |
08b8a139 | 337 | static const registry<inferior>::key<auxv_info> auxv_inferior_data; |
865ecab4 LM |
338 | |
339 | /* Invalidate INF's auxv cache. */ | |
340 | ||
341 | static void | |
342 | invalidate_auxv_cache_inf (struct inferior *inf) | |
343 | { | |
e9b89e2d | 344 | auxv_inferior_data.clear (inf); |
865ecab4 LM |
345 | } |
346 | ||
a2827364 AB |
347 | /* Invalidate current inferior's auxv cache when all symbol table data is |
348 | cleared (indicated by OBJFILE being nullptr). */ | |
865ecab4 LM |
349 | |
350 | static void | |
a2827364 | 351 | auxv_new_objfile_observer (struct objfile *objfile) |
865ecab4 | 352 | { |
a2827364 | 353 | if (objfile == nullptr) |
1b28c0f4 AB |
354 | { |
355 | /* When OBJFILE is nullptr, this indicates that all symbol files have | |
356 | been unloaded from the current program space. Discard cached auxv | |
357 | information from any inferior within the effected program space. */ | |
358 | for (inferior *inf : all_inferiors ()) | |
359 | { | |
360 | if (inf->pspace == current_program_space) | |
361 | invalidate_auxv_cache_inf (inf); | |
362 | } | |
363 | } | |
865ecab4 LM |
364 | } |
365 | ||
82d23ca8 | 366 | /* See auxv.h. */ |
865ecab4 | 367 | |
9246b7bd | 368 | const gdb::optional<gdb::byte_vector> & |
82d23ca8 | 369 | target_read_auxv () |
865ecab4 | 370 | { |
82d23ca8 SM |
371 | inferior *inf = current_inferior (); |
372 | auxv_info *info = auxv_inferior_data.get (inf); | |
865ecab4 | 373 | |
82d23ca8 | 374 | if (info == nullptr) |
865ecab4 | 375 | { |
e9b89e2d | 376 | info = auxv_inferior_data.emplace (inf); |
1639fab3 | 377 | info->data = target_read_auxv_raw (inf->top_target ()); |
865ecab4 LM |
378 | } |
379 | ||
82d23ca8 | 380 | return info->data; |
865ecab4 LM |
381 | } |
382 | ||
82d23ca8 SM |
383 | /* See auxv.h. */ |
384 | ||
385 | gdb::optional<gdb::byte_vector> | |
1639fab3 | 386 | target_read_auxv_raw (target_ops *ops) |
14ed0a8b | 387 | { |
82d23ca8 SM |
388 | return target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL); |
389 | } | |
865ecab4 | 390 | |
82d23ca8 | 391 | /* See auxv.h. */ |
14ed0a8b | 392 | |
82d23ca8 SM |
393 | int |
394 | target_auxv_search (const gdb::byte_vector &auxv, target_ops *ops, | |
395 | gdbarch *gdbarch, CORE_ADDR match, CORE_ADDR *valp) | |
396 | { | |
397 | CORE_ADDR type, val; | |
398 | const gdb_byte *data = auxv.data (); | |
3fe639b8 | 399 | const gdb_byte *ptr = data; |
82d23ca8 | 400 | size_t len = auxv.size (); |
14ed0a8b RM |
401 | |
402 | while (1) | |
82d23ca8 | 403 | switch (parse_auxv (ops, gdbarch, &ptr, data + len, &type, &val)) |
14ed0a8b RM |
404 | { |
405 | case 1: /* Here's an entry, check it. */ | |
406 | if (type == match) | |
407 | { | |
14ed0a8b RM |
408 | *valp = val; |
409 | return 1; | |
410 | } | |
411 | break; | |
412 | case 0: /* End of the vector. */ | |
14ed0a8b RM |
413 | return 0; |
414 | default: /* Bogosity. */ | |
14ed0a8b RM |
415 | return -1; |
416 | } | |
14ed0a8b RM |
417 | } |
418 | ||
82d23ca8 SM |
419 | /* See auxv.h. */ |
420 | ||
421 | int | |
422 | target_auxv_search (CORE_ADDR match, CORE_ADDR *valp) | |
423 | { | |
9246b7bd | 424 | const gdb::optional<gdb::byte_vector> &auxv = target_read_auxv (); |
82d23ca8 SM |
425 | |
426 | if (!auxv.has_value ()) | |
427 | return -1; | |
428 | ||
429 | return target_auxv_search (*auxv, current_inferior ()->top_target (), | |
430 | current_inferior ()->gdbarch, match, valp); | |
431 | } | |
14ed0a8b | 432 | |
2faa3447 JB |
433 | /* Print the description of a single AUXV entry on the specified file. */ |
434 | ||
435 | void | |
436 | fprint_auxv_entry (struct ui_file *file, const char *name, | |
437 | const char *description, enum auxv_format format, | |
438 | CORE_ADDR type, CORE_ADDR val) | |
439 | { | |
6cb06a8c TT |
440 | gdb_printf (file, ("%-4s %-20s %-30s "), |
441 | plongest (type), name, description); | |
2faa3447 JB |
442 | switch (format) |
443 | { | |
444 | case AUXV_FORMAT_DEC: | |
6cb06a8c | 445 | gdb_printf (file, ("%s\n"), plongest (val)); |
2faa3447 JB |
446 | break; |
447 | case AUXV_FORMAT_HEX: | |
6cb06a8c | 448 | gdb_printf (file, ("%s\n"), paddress (target_gdbarch (), val)); |
2faa3447 JB |
449 | break; |
450 | case AUXV_FORMAT_STR: | |
451 | { | |
452 | struct value_print_options opts; | |
453 | ||
454 | get_user_print_options (&opts); | |
455 | if (opts.addressprint) | |
6cb06a8c | 456 | gdb_printf (file, ("%s "), paddress (target_gdbarch (), val)); |
2faa3447 JB |
457 | val_print_string (builtin_type (target_gdbarch ())->builtin_char, |
458 | NULL, val, -1, file, &opts); | |
6cb06a8c | 459 | gdb_printf (file, ("\n")); |
2faa3447 JB |
460 | } |
461 | break; | |
462 | } | |
463 | } | |
464 | ||
465 | /* The default implementation of gdbarch_print_auxv_entry. */ | |
466 | ||
467 | void | |
468 | default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, | |
469 | CORE_ADDR type, CORE_ADDR val) | |
470 | { | |
471 | const char *name = "???"; | |
472 | const char *description = ""; | |
473 | enum auxv_format format = AUXV_FORMAT_HEX; | |
474 | ||
475 | switch (type) | |
476 | { | |
477 | #define TAG(tag, text, kind) \ | |
478 | case tag: name = #tag; description = text; format = kind; break | |
479 | TAG (AT_NULL, _("End of vector"), AUXV_FORMAT_HEX); | |
480 | TAG (AT_IGNORE, _("Entry should be ignored"), AUXV_FORMAT_HEX); | |
481 | TAG (AT_EXECFD, _("File descriptor of program"), AUXV_FORMAT_DEC); | |
482 | TAG (AT_PHDR, _("Program headers for program"), AUXV_FORMAT_HEX); | |
483 | TAG (AT_PHENT, _("Size of program header entry"), AUXV_FORMAT_DEC); | |
484 | TAG (AT_PHNUM, _("Number of program headers"), AUXV_FORMAT_DEC); | |
485 | TAG (AT_PAGESZ, _("System page size"), AUXV_FORMAT_DEC); | |
486 | TAG (AT_BASE, _("Base address of interpreter"), AUXV_FORMAT_HEX); | |
487 | TAG (AT_FLAGS, _("Flags"), AUXV_FORMAT_HEX); | |
488 | TAG (AT_ENTRY, _("Entry point of program"), AUXV_FORMAT_HEX); | |
489 | TAG (AT_NOTELF, _("Program is not ELF"), AUXV_FORMAT_DEC); | |
490 | TAG (AT_UID, _("Real user ID"), AUXV_FORMAT_DEC); | |
491 | TAG (AT_EUID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
492 | TAG (AT_GID, _("Real group ID"), AUXV_FORMAT_DEC); | |
493 | TAG (AT_EGID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
494 | TAG (AT_CLKTCK, _("Frequency of times()"), AUXV_FORMAT_DEC); | |
495 | TAG (AT_PLATFORM, _("String identifying platform"), AUXV_FORMAT_STR); | |
496 | TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), | |
497 | AUXV_FORMAT_HEX); | |
498 | TAG (AT_FPUCW, _("Used FPU control word"), AUXV_FORMAT_DEC); | |
499 | TAG (AT_DCACHEBSIZE, _("Data cache block size"), AUXV_FORMAT_DEC); | |
500 | TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), AUXV_FORMAT_DEC); | |
501 | TAG (AT_UCACHEBSIZE, _("Unified cache block size"), AUXV_FORMAT_DEC); | |
502 | TAG (AT_IGNOREPPC, _("Entry should be ignored"), AUXV_FORMAT_DEC); | |
503 | TAG (AT_BASE_PLATFORM, _("String identifying base platform"), | |
504 | AUXV_FORMAT_STR); | |
505 | TAG (AT_RANDOM, _("Address of 16 random bytes"), AUXV_FORMAT_HEX); | |
506 | TAG (AT_HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX); | |
507 | TAG (AT_EXECFN, _("File name of executable"), AUXV_FORMAT_STR); | |
508 | TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), AUXV_FORMAT_DEC); | |
509 | TAG (AT_SYSINFO, _("Special system info/entry points"), AUXV_FORMAT_HEX); | |
510 | TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), | |
511 | AUXV_FORMAT_HEX); | |
512 | TAG (AT_L1I_CACHESHAPE, _("L1 Instruction cache information"), | |
513 | AUXV_FORMAT_HEX); | |
bb7b70ab LM |
514 | TAG (AT_L1I_CACHESIZE, _("L1 Instruction cache size"), AUXV_FORMAT_HEX); |
515 | TAG (AT_L1I_CACHEGEOMETRY, _("L1 Instruction cache geometry"), | |
516 | AUXV_FORMAT_HEX); | |
2faa3447 | 517 | TAG (AT_L1D_CACHESHAPE, _("L1 Data cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
518 | TAG (AT_L1D_CACHESIZE, _("L1 Data cache size"), AUXV_FORMAT_HEX); |
519 | TAG (AT_L1D_CACHEGEOMETRY, _("L1 Data cache geometry"), | |
520 | AUXV_FORMAT_HEX); | |
2faa3447 | 521 | TAG (AT_L2_CACHESHAPE, _("L2 cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
522 | TAG (AT_L2_CACHESIZE, _("L2 cache size"), AUXV_FORMAT_HEX); |
523 | TAG (AT_L2_CACHEGEOMETRY, _("L2 cache geometry"), AUXV_FORMAT_HEX); | |
2faa3447 | 524 | TAG (AT_L3_CACHESHAPE, _("L3 cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
525 | TAG (AT_L3_CACHESIZE, _("L3 cache size"), AUXV_FORMAT_HEX); |
526 | TAG (AT_L3_CACHEGEOMETRY, _("L3 cache geometry"), AUXV_FORMAT_HEX); | |
527 | TAG (AT_MINSIGSTKSZ, _("Minimum stack size for signal delivery"), | |
528 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
529 | TAG (AT_SUN_UID, _("Effective user ID"), AUXV_FORMAT_DEC); |
530 | TAG (AT_SUN_RUID, _("Real user ID"), AUXV_FORMAT_DEC); | |
531 | TAG (AT_SUN_GID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
532 | TAG (AT_SUN_RGID, _("Real group ID"), AUXV_FORMAT_DEC); | |
533 | TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), AUXV_FORMAT_HEX); | |
534 | TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), | |
535 | AUXV_FORMAT_HEX); | |
536 | TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), | |
537 | AUXV_FORMAT_STR); | |
538 | TAG (AT_SUN_LPAGESZ, _("Large pagesize"), AUXV_FORMAT_DEC); | |
539 | TAG (AT_SUN_PLATFORM, _("Platform name string"), AUXV_FORMAT_STR); | |
3d282ac3 | 540 | TAG (AT_SUN_CAP_HW1, _("Machine-dependent CPU capability hints"), |
2faa3447 JB |
541 | AUXV_FORMAT_HEX); |
542 | TAG (AT_SUN_IFLUSH, _("Should flush icache?"), AUXV_FORMAT_DEC); | |
543 | TAG (AT_SUN_CPU, _("CPU name string"), AUXV_FORMAT_STR); | |
544 | TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), AUXV_FORMAT_HEX); | |
545 | TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), | |
546 | AUXV_FORMAT_DEC); | |
547 | TAG (AT_SUN_EXECNAME, | |
548 | _("Canonicalized file name given to execve"), AUXV_FORMAT_STR); | |
549 | TAG (AT_SUN_MMU, _("String for name of MMU module"), AUXV_FORMAT_STR); | |
550 | TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), | |
551 | AUXV_FORMAT_HEX); | |
552 | TAG (AT_SUN_AUXFLAGS, | |
553 | _("AF_SUN_ flags passed from the kernel"), AUXV_FORMAT_HEX); | |
3d282ac3 RO |
554 | TAG (AT_SUN_EMULATOR, _("Name of emulation binary for runtime linker"), |
555 | AUXV_FORMAT_STR); | |
556 | TAG (AT_SUN_BRANDNAME, _("Name of brand library"), AUXV_FORMAT_STR); | |
557 | TAG (AT_SUN_BRAND_AUX1, _("Aux vector for brand modules 1"), | |
558 | AUXV_FORMAT_HEX); | |
559 | TAG (AT_SUN_BRAND_AUX2, _("Aux vector for brand modules 2"), | |
560 | AUXV_FORMAT_HEX); | |
561 | TAG (AT_SUN_BRAND_AUX3, _("Aux vector for brand modules 3"), | |
562 | AUXV_FORMAT_HEX); | |
563 | TAG (AT_SUN_CAP_HW2, _("Machine-dependent CPU capability hints 2"), | |
564 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
565 | } |
566 | ||
567 | fprint_auxv_entry (file, name, description, format, type, val); | |
568 | } | |
569 | ||
0e2de366 | 570 | /* Print the contents of the target's AUXV on the specified file. */ |
2faa3447 | 571 | |
e2df8050 | 572 | static int |
82d23ca8 | 573 | fprint_target_auxv (struct ui_file *file) |
14ed0a8b | 574 | { |
2faa3447 | 575 | struct gdbarch *gdbarch = target_gdbarch (); |
14ed0a8b | 576 | CORE_ADDR type, val; |
14ed0a8b | 577 | int ents = 0; |
9246b7bd | 578 | const gdb::optional<gdb::byte_vector> &auxv = target_read_auxv (); |
14ed0a8b | 579 | |
82d23ca8 | 580 | if (!auxv.has_value ()) |
9018be22 | 581 | return -1; |
14ed0a8b | 582 | |
82d23ca8 | 583 | const gdb_byte *data = auxv->data (); |
3fe639b8 | 584 | const gdb_byte *ptr = data; |
82d23ca8 | 585 | size_t len = auxv->size (); |
865ecab4 | 586 | |
82d23ca8 SM |
587 | while (parse_auxv (current_inferior ()->top_target (), |
588 | current_inferior ()->gdbarch, | |
589 | &ptr, data + len, &type, &val) > 0) | |
14ed0a8b | 590 | { |
2faa3447 | 591 | gdbarch_print_auxv_entry (gdbarch, file, type, val); |
14ed0a8b | 592 | ++ents; |
7c6467a4 PP |
593 | if (type == AT_NULL) |
594 | break; | |
14ed0a8b RM |
595 | } |
596 | ||
14ed0a8b RM |
597 | return ents; |
598 | } | |
599 | ||
600 | static void | |
1d12d88f | 601 | info_auxv_command (const char *cmd, int from_tty) |
14ed0a8b | 602 | { |
841de120 | 603 | if (! target_has_stack ()) |
edefbb7c | 604 | error (_("The program has no auxiliary information now.")); |
14ed0a8b RM |
605 | else |
606 | { | |
82d23ca8 | 607 | int ents = fprint_target_auxv (gdb_stdout); |
5b4ee69b | 608 | |
14ed0a8b | 609 | if (ents < 0) |
edefbb7c | 610 | error (_("No auxiliary vector found, or failed reading it.")); |
14ed0a8b | 611 | else if (ents == 0) |
edefbb7c | 612 | error (_("Auxiliary vector is empty.")); |
14ed0a8b RM |
613 | } |
614 | } | |
615 | ||
6c265988 | 616 | void _initialize_auxv (); |
14ed0a8b | 617 | void |
6c265988 | 618 | _initialize_auxv () |
14ed0a8b RM |
619 | { |
620 | add_info ("auxv", info_auxv_command, | |
edefbb7c AC |
621 | _("Display the inferior's auxiliary vector.\n\ |
622 | This is information provided by the operating system at program startup.")); | |
865ecab4 | 623 | |
865ecab4 | 624 | /* Observers used to invalidate the auxv cache when needed. */ |
c90e7d63 SM |
625 | gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf, "auxv"); |
626 | gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf, "auxv"); | |
a2827364 | 627 | gdb::observers::new_objfile.attach (auxv_new_objfile_observer, "auxv"); |
14ed0a8b | 628 | } |