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14ed0a8b RM |
1 | /* Auxiliary vector support for GDB, the GNU debugger. |
2 | ||
1d506c26 | 3 | Copyright (C) 2004-2024 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 | 19 | |
4de283e4 | 20 | #include "target.h" |
d55e5aa6 | 21 | #include "gdbtypes.h" |
4de283e4 | 22 | #include "command.h" |
d55e5aa6 | 23 | #include "inferior.h" |
d55e5aa6 | 24 | #include "valprint.h" |
4de283e4 TT |
25 | #include "gdbcore.h" |
26 | #include "observable.h" | |
268a13a5 | 27 | #include "gdbsupport/filestuff.h" |
4de283e4 TT |
28 | #include "objfiles.h" |
29 | ||
30 | #include "auxv.h" | |
31 | #include "elf/common.h" | |
32 | ||
33 | #include <unistd.h> | |
34 | #include <fcntl.h> | |
14ed0a8b RM |
35 | |
36 | ||
edcc890f YQ |
37 | /* Implement the to_xfer_partial target_ops method. This function |
38 | handles access via /proc/PID/auxv, which is a common method for | |
39 | native targets. */ | |
14ed0a8b | 40 | |
9b409511 | 41 | static enum target_xfer_status |
9f2982ff | 42 | procfs_xfer_auxv (gdb_byte *readbuf, |
36aa5e41 | 43 | const gdb_byte *writebuf, |
14ed0a8b | 44 | ULONGEST offset, |
9b409511 YQ |
45 | ULONGEST len, |
46 | ULONGEST *xfered_len) | |
14ed0a8b | 47 | { |
9b409511 | 48 | ssize_t l; |
14ed0a8b | 49 | |
528e1572 | 50 | std::string pathname = string_printf ("/proc/%d/auxv", inferior_ptid.pid ()); |
13084383 SM |
51 | scoped_fd fd |
52 | = gdb_open_cloexec (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY, 0); | |
53 | if (fd.get () < 0) | |
2ed4b548 | 54 | return TARGET_XFER_E_IO; |
14ed0a8b RM |
55 | |
56 | if (offset != (ULONGEST) 0 | |
13084383 | 57 | && lseek (fd.get (), (off_t) offset, SEEK_SET) != (off_t) offset) |
9b409511 | 58 | l = -1; |
14ed0a8b | 59 | else if (readbuf != NULL) |
13084383 | 60 | l = read (fd.get (), readbuf, (size_t) len); |
14ed0a8b | 61 | else |
13084383 | 62 | l = write (fd.get (), writebuf, (size_t) len); |
14ed0a8b | 63 | |
9b409511 YQ |
64 | if (l < 0) |
65 | return TARGET_XFER_E_IO; | |
66 | else if (l == 0) | |
67 | return TARGET_XFER_EOF; | |
68 | else | |
69 | { | |
70 | *xfered_len = (ULONGEST) l; | |
71 | return TARGET_XFER_OK; | |
72 | } | |
14ed0a8b RM |
73 | } |
74 | ||
9f2982ff JK |
75 | /* This function handles access via ld.so's symbol `_dl_auxv'. */ |
76 | ||
9b409511 | 77 | static enum target_xfer_status |
9f2982ff JK |
78 | ld_so_xfer_auxv (gdb_byte *readbuf, |
79 | const gdb_byte *writebuf, | |
80 | ULONGEST offset, | |
9b409511 | 81 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff | 82 | { |
3b7344d5 | 83 | struct bound_minimal_symbol msym; |
9f2982ff | 84 | CORE_ADDR data_address, pointer_address; |
99d9c3b9 SM |
85 | gdbarch *arch = current_inferior ()->arch (); |
86 | type *ptr_type = builtin_type (arch)->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 | 286 | { |
99d9c3b9 | 287 | gdbarch *gdbarch = current_inferior ()->arch (); |
206c98a6 | 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 | { | |
6b09f134 | 333 | std::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 | ||
74daa597 | 347 | /* Invalidate the auxv cache for all inferiors using PSPACE. */ |
865ecab4 LM |
348 | |
349 | static void | |
74daa597 | 350 | auxv_all_objfiles_removed (program_space *pspace) |
865ecab4 | 351 | { |
74daa597 SM |
352 | for (inferior *inf : all_inferiors ()) |
353 | if (inf->pspace == current_program_space) | |
354 | invalidate_auxv_cache_inf (inf); | |
865ecab4 LM |
355 | } |
356 | ||
82d23ca8 | 357 | /* See auxv.h. */ |
865ecab4 | 358 | |
6b09f134 | 359 | const std::optional<gdb::byte_vector> & |
82d23ca8 | 360 | target_read_auxv () |
865ecab4 | 361 | { |
82d23ca8 SM |
362 | inferior *inf = current_inferior (); |
363 | auxv_info *info = auxv_inferior_data.get (inf); | |
865ecab4 | 364 | |
82d23ca8 | 365 | if (info == nullptr) |
865ecab4 | 366 | { |
e9b89e2d | 367 | info = auxv_inferior_data.emplace (inf); |
1639fab3 | 368 | info->data = target_read_auxv_raw (inf->top_target ()); |
865ecab4 LM |
369 | } |
370 | ||
82d23ca8 | 371 | return info->data; |
865ecab4 LM |
372 | } |
373 | ||
82d23ca8 SM |
374 | /* See auxv.h. */ |
375 | ||
6b09f134 | 376 | std::optional<gdb::byte_vector> |
1639fab3 | 377 | target_read_auxv_raw (target_ops *ops) |
14ed0a8b | 378 | { |
82d23ca8 SM |
379 | return target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL); |
380 | } | |
865ecab4 | 381 | |
82d23ca8 | 382 | /* See auxv.h. */ |
14ed0a8b | 383 | |
82d23ca8 SM |
384 | int |
385 | target_auxv_search (const gdb::byte_vector &auxv, target_ops *ops, | |
386 | gdbarch *gdbarch, CORE_ADDR match, CORE_ADDR *valp) | |
387 | { | |
388 | CORE_ADDR type, val; | |
389 | const gdb_byte *data = auxv.data (); | |
3fe639b8 | 390 | const gdb_byte *ptr = data; |
82d23ca8 | 391 | size_t len = auxv.size (); |
14ed0a8b RM |
392 | |
393 | while (1) | |
82d23ca8 | 394 | switch (parse_auxv (ops, gdbarch, &ptr, data + len, &type, &val)) |
14ed0a8b RM |
395 | { |
396 | case 1: /* Here's an entry, check it. */ | |
397 | if (type == match) | |
398 | { | |
14ed0a8b RM |
399 | *valp = val; |
400 | return 1; | |
401 | } | |
402 | break; | |
403 | case 0: /* End of the vector. */ | |
14ed0a8b RM |
404 | return 0; |
405 | default: /* Bogosity. */ | |
14ed0a8b RM |
406 | return -1; |
407 | } | |
14ed0a8b RM |
408 | } |
409 | ||
82d23ca8 SM |
410 | /* See auxv.h. */ |
411 | ||
412 | int | |
413 | target_auxv_search (CORE_ADDR match, CORE_ADDR *valp) | |
414 | { | |
6b09f134 | 415 | const std::optional<gdb::byte_vector> &auxv = target_read_auxv (); |
82d23ca8 SM |
416 | |
417 | if (!auxv.has_value ()) | |
418 | return -1; | |
419 | ||
420 | return target_auxv_search (*auxv, current_inferior ()->top_target (), | |
27b1f19f | 421 | current_inferior ()->arch (), match, valp); |
82d23ca8 | 422 | } |
14ed0a8b | 423 | |
2faa3447 JB |
424 | /* Print the description of a single AUXV entry on the specified file. */ |
425 | ||
426 | void | |
427 | fprint_auxv_entry (struct ui_file *file, const char *name, | |
428 | const char *description, enum auxv_format format, | |
429 | CORE_ADDR type, CORE_ADDR val) | |
430 | { | |
99d9c3b9 | 431 | gdbarch *arch = current_inferior ()->arch (); |
6cb06a8c TT |
432 | gdb_printf (file, ("%-4s %-20s %-30s "), |
433 | plongest (type), name, description); | |
2faa3447 JB |
434 | switch (format) |
435 | { | |
436 | case AUXV_FORMAT_DEC: | |
6cb06a8c | 437 | gdb_printf (file, ("%s\n"), plongest (val)); |
2faa3447 JB |
438 | break; |
439 | case AUXV_FORMAT_HEX: | |
99d9c3b9 | 440 | gdb_printf (file, ("%s\n"), paddress (arch, val)); |
2faa3447 JB |
441 | break; |
442 | case AUXV_FORMAT_STR: | |
443 | { | |
444 | struct value_print_options opts; | |
445 | ||
446 | get_user_print_options (&opts); | |
447 | if (opts.addressprint) | |
99d9c3b9 SM |
448 | gdb_printf (file, ("%s "), paddress (arch, val)); |
449 | val_print_string (builtin_type (arch)->builtin_char, | |
2faa3447 | 450 | NULL, val, -1, file, &opts); |
6cb06a8c | 451 | gdb_printf (file, ("\n")); |
2faa3447 JB |
452 | } |
453 | break; | |
454 | } | |
455 | } | |
456 | ||
457 | /* The default implementation of gdbarch_print_auxv_entry. */ | |
458 | ||
459 | void | |
460 | default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, | |
461 | CORE_ADDR type, CORE_ADDR val) | |
462 | { | |
463 | const char *name = "???"; | |
464 | const char *description = ""; | |
465 | enum auxv_format format = AUXV_FORMAT_HEX; | |
466 | ||
467 | switch (type) | |
468 | { | |
469 | #define TAG(tag, text, kind) \ | |
470 | case tag: name = #tag; description = text; format = kind; break | |
471 | TAG (AT_NULL, _("End of vector"), AUXV_FORMAT_HEX); | |
472 | TAG (AT_IGNORE, _("Entry should be ignored"), AUXV_FORMAT_HEX); | |
473 | TAG (AT_EXECFD, _("File descriptor of program"), AUXV_FORMAT_DEC); | |
474 | TAG (AT_PHDR, _("Program headers for program"), AUXV_FORMAT_HEX); | |
475 | TAG (AT_PHENT, _("Size of program header entry"), AUXV_FORMAT_DEC); | |
476 | TAG (AT_PHNUM, _("Number of program headers"), AUXV_FORMAT_DEC); | |
477 | TAG (AT_PAGESZ, _("System page size"), AUXV_FORMAT_DEC); | |
478 | TAG (AT_BASE, _("Base address of interpreter"), AUXV_FORMAT_HEX); | |
479 | TAG (AT_FLAGS, _("Flags"), AUXV_FORMAT_HEX); | |
480 | TAG (AT_ENTRY, _("Entry point of program"), AUXV_FORMAT_HEX); | |
481 | TAG (AT_NOTELF, _("Program is not ELF"), AUXV_FORMAT_DEC); | |
482 | TAG (AT_UID, _("Real user ID"), AUXV_FORMAT_DEC); | |
483 | TAG (AT_EUID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
484 | TAG (AT_GID, _("Real group ID"), AUXV_FORMAT_DEC); | |
485 | TAG (AT_EGID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
486 | TAG (AT_CLKTCK, _("Frequency of times()"), AUXV_FORMAT_DEC); | |
487 | TAG (AT_PLATFORM, _("String identifying platform"), AUXV_FORMAT_STR); | |
488 | TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), | |
489 | AUXV_FORMAT_HEX); | |
490 | TAG (AT_FPUCW, _("Used FPU control word"), AUXV_FORMAT_DEC); | |
491 | TAG (AT_DCACHEBSIZE, _("Data cache block size"), AUXV_FORMAT_DEC); | |
492 | TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), AUXV_FORMAT_DEC); | |
493 | TAG (AT_UCACHEBSIZE, _("Unified cache block size"), AUXV_FORMAT_DEC); | |
494 | TAG (AT_IGNOREPPC, _("Entry should be ignored"), AUXV_FORMAT_DEC); | |
495 | TAG (AT_BASE_PLATFORM, _("String identifying base platform"), | |
496 | AUXV_FORMAT_STR); | |
497 | TAG (AT_RANDOM, _("Address of 16 random bytes"), AUXV_FORMAT_HEX); | |
498 | TAG (AT_HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX); | |
7a3bb62d IL |
499 | TAG (AT_RSEQ_FEATURE_SIZE, _("rseq supported feature size"), |
500 | AUXV_FORMAT_DEC); | |
501 | TAG (AT_RSEQ_ALIGN, _("rseq allocation alignment"), | |
502 | AUXV_FORMAT_DEC); | |
2faa3447 JB |
503 | TAG (AT_EXECFN, _("File name of executable"), AUXV_FORMAT_STR); |
504 | TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), AUXV_FORMAT_DEC); | |
505 | TAG (AT_SYSINFO, _("Special system info/entry points"), AUXV_FORMAT_HEX); | |
506 | TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), | |
507 | AUXV_FORMAT_HEX); | |
508 | TAG (AT_L1I_CACHESHAPE, _("L1 Instruction cache information"), | |
509 | AUXV_FORMAT_HEX); | |
bb7b70ab LM |
510 | TAG (AT_L1I_CACHESIZE, _("L1 Instruction cache size"), AUXV_FORMAT_HEX); |
511 | TAG (AT_L1I_CACHEGEOMETRY, _("L1 Instruction cache geometry"), | |
512 | AUXV_FORMAT_HEX); | |
2faa3447 | 513 | TAG (AT_L1D_CACHESHAPE, _("L1 Data cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
514 | TAG (AT_L1D_CACHESIZE, _("L1 Data cache size"), AUXV_FORMAT_HEX); |
515 | TAG (AT_L1D_CACHEGEOMETRY, _("L1 Data cache geometry"), | |
516 | AUXV_FORMAT_HEX); | |
2faa3447 | 517 | TAG (AT_L2_CACHESHAPE, _("L2 cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
518 | TAG (AT_L2_CACHESIZE, _("L2 cache size"), AUXV_FORMAT_HEX); |
519 | TAG (AT_L2_CACHEGEOMETRY, _("L2 cache geometry"), AUXV_FORMAT_HEX); | |
2faa3447 | 520 | TAG (AT_L3_CACHESHAPE, _("L3 cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
521 | TAG (AT_L3_CACHESIZE, _("L3 cache size"), AUXV_FORMAT_HEX); |
522 | TAG (AT_L3_CACHEGEOMETRY, _("L3 cache geometry"), AUXV_FORMAT_HEX); | |
523 | TAG (AT_MINSIGSTKSZ, _("Minimum stack size for signal delivery"), | |
524 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
525 | TAG (AT_SUN_UID, _("Effective user ID"), AUXV_FORMAT_DEC); |
526 | TAG (AT_SUN_RUID, _("Real user ID"), AUXV_FORMAT_DEC); | |
527 | TAG (AT_SUN_GID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
528 | TAG (AT_SUN_RGID, _("Real group ID"), AUXV_FORMAT_DEC); | |
529 | TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), AUXV_FORMAT_HEX); | |
530 | TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), | |
531 | AUXV_FORMAT_HEX); | |
532 | TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), | |
533 | AUXV_FORMAT_STR); | |
534 | TAG (AT_SUN_LPAGESZ, _("Large pagesize"), AUXV_FORMAT_DEC); | |
535 | TAG (AT_SUN_PLATFORM, _("Platform name string"), AUXV_FORMAT_STR); | |
3d282ac3 | 536 | TAG (AT_SUN_CAP_HW1, _("Machine-dependent CPU capability hints"), |
2faa3447 JB |
537 | AUXV_FORMAT_HEX); |
538 | TAG (AT_SUN_IFLUSH, _("Should flush icache?"), AUXV_FORMAT_DEC); | |
539 | TAG (AT_SUN_CPU, _("CPU name string"), AUXV_FORMAT_STR); | |
540 | TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), AUXV_FORMAT_HEX); | |
541 | TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), | |
542 | AUXV_FORMAT_DEC); | |
543 | TAG (AT_SUN_EXECNAME, | |
544 | _("Canonicalized file name given to execve"), AUXV_FORMAT_STR); | |
545 | TAG (AT_SUN_MMU, _("String for name of MMU module"), AUXV_FORMAT_STR); | |
546 | TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), | |
547 | AUXV_FORMAT_HEX); | |
548 | TAG (AT_SUN_AUXFLAGS, | |
549 | _("AF_SUN_ flags passed from the kernel"), AUXV_FORMAT_HEX); | |
3d282ac3 RO |
550 | TAG (AT_SUN_EMULATOR, _("Name of emulation binary for runtime linker"), |
551 | AUXV_FORMAT_STR); | |
552 | TAG (AT_SUN_BRANDNAME, _("Name of brand library"), AUXV_FORMAT_STR); | |
553 | TAG (AT_SUN_BRAND_AUX1, _("Aux vector for brand modules 1"), | |
554 | AUXV_FORMAT_HEX); | |
555 | TAG (AT_SUN_BRAND_AUX2, _("Aux vector for brand modules 2"), | |
556 | AUXV_FORMAT_HEX); | |
557 | TAG (AT_SUN_BRAND_AUX3, _("Aux vector for brand modules 3"), | |
558 | AUXV_FORMAT_HEX); | |
559 | TAG (AT_SUN_CAP_HW2, _("Machine-dependent CPU capability hints 2"), | |
560 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
561 | } |
562 | ||
563 | fprint_auxv_entry (file, name, description, format, type, val); | |
564 | } | |
565 | ||
0e2de366 | 566 | /* Print the contents of the target's AUXV on the specified file. */ |
2faa3447 | 567 | |
e2df8050 | 568 | static int |
82d23ca8 | 569 | fprint_target_auxv (struct ui_file *file) |
14ed0a8b | 570 | { |
99d9c3b9 | 571 | gdbarch *gdbarch = current_inferior ()->arch (); |
14ed0a8b | 572 | CORE_ADDR type, val; |
14ed0a8b | 573 | int ents = 0; |
6b09f134 | 574 | const std::optional<gdb::byte_vector> &auxv = target_read_auxv (); |
14ed0a8b | 575 | |
82d23ca8 | 576 | if (!auxv.has_value ()) |
9018be22 | 577 | return -1; |
14ed0a8b | 578 | |
82d23ca8 | 579 | const gdb_byte *data = auxv->data (); |
3fe639b8 | 580 | const gdb_byte *ptr = data; |
82d23ca8 | 581 | size_t len = auxv->size (); |
865ecab4 | 582 | |
99d9c3b9 SM |
583 | while (parse_auxv (current_inferior ()->top_target (), gdbarch, &ptr, |
584 | data + len, &type, &val) > 0) | |
14ed0a8b | 585 | { |
2faa3447 | 586 | gdbarch_print_auxv_entry (gdbarch, file, type, val); |
14ed0a8b | 587 | ++ents; |
7c6467a4 PP |
588 | if (type == AT_NULL) |
589 | break; | |
14ed0a8b RM |
590 | } |
591 | ||
14ed0a8b RM |
592 | return ents; |
593 | } | |
594 | ||
595 | static void | |
1d12d88f | 596 | info_auxv_command (const char *cmd, int from_tty) |
14ed0a8b | 597 | { |
841de120 | 598 | if (! target_has_stack ()) |
edefbb7c | 599 | error (_("The program has no auxiliary information now.")); |
14ed0a8b RM |
600 | else |
601 | { | |
82d23ca8 | 602 | int ents = fprint_target_auxv (gdb_stdout); |
5b4ee69b | 603 | |
14ed0a8b | 604 | if (ents < 0) |
edefbb7c | 605 | error (_("No auxiliary vector found, or failed reading it.")); |
14ed0a8b | 606 | else if (ents == 0) |
edefbb7c | 607 | error (_("Auxiliary vector is empty.")); |
14ed0a8b RM |
608 | } |
609 | } | |
610 | ||
6c265988 | 611 | void _initialize_auxv (); |
14ed0a8b | 612 | void |
6c265988 | 613 | _initialize_auxv () |
14ed0a8b RM |
614 | { |
615 | add_info ("auxv", info_auxv_command, | |
edefbb7c AC |
616 | _("Display the inferior's auxiliary vector.\n\ |
617 | This is information provided by the operating system at program startup.")); | |
865ecab4 | 618 | |
865ecab4 | 619 | /* Observers used to invalidate the auxv cache when needed. */ |
c90e7d63 SM |
620 | gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf, "auxv"); |
621 | gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf, "auxv"); | |
74daa597 SM |
622 | gdb::observers::all_objfiles_removed.attach (auxv_all_objfiles_removed, |
623 | "auxv"); | |
14ed0a8b | 624 | } |