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14ed0a8b RM |
1 | /* Auxiliary vector support for GDB, the GNU debugger. |
2 | ||
4a94e368 | 3 | Copyright (C) 2004-2022 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; |
9f2982ff JK |
87 | size_t ptr_size = TYPE_LENGTH (ptr_type); |
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 | |
3b7344d5 | 97 | if (MSYMBOL_SIZE (msym.minsym) != 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 JK |
236 | |
237 | if (current_inferior ()->attach_flag != 0) | |
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 | |
253 | generic_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr, | |
254 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp, | |
255 | int sizeof_auxv_type) | |
14ed0a8b | 256 | { |
206c98a6 KR |
257 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
258 | const int sizeof_auxv_val = TYPE_LENGTH (ptr_type); | |
259 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
36aa5e41 | 260 | 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 | |
284 | default_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
285 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
286 | { | |
287 | struct gdbarch *gdbarch = target_gdbarch (); | |
288 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; | |
289 | const int sizeof_auxv_type = TYPE_LENGTH (ptr_type); | |
290 | ||
291 | return generic_auxv_parse (gdbarch, readptr, endptr, typep, valp, | |
292 | sizeof_auxv_type); | |
293 | } | |
294 | ||
295 | /* See auxv.h. */ | |
296 | ||
297 | int | |
298 | svr4_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr, | |
299 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
300 | { | |
301 | struct type *int_type = builtin_type (gdbarch)->builtin_int; | |
302 | const int sizeof_auxv_type = TYPE_LENGTH (int_type); | |
303 | ||
304 | return generic_auxv_parse (gdbarch, readptr, endptr, typep, valp, | |
305 | sizeof_auxv_type); | |
306 | } | |
307 | ||
c47ffbe3 VP |
308 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. |
309 | Return 0 if *READPTR is already at the end of the buffer. | |
310 | Return -1 if there is insufficient buffer for a whole entry. | |
311 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
312 | int | |
f6ac5f3d PA |
313 | target_auxv_parse (gdb_byte **readptr, |
314 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 315 | { |
27a48a92 MK |
316 | struct gdbarch *gdbarch = target_gdbarch(); |
317 | ||
318 | if (gdbarch_auxv_parse_p (gdbarch)) | |
319 | return gdbarch_auxv_parse (gdbarch, readptr, endptr, typep, valp); | |
320 | ||
328d42d8 SM |
321 | return current_inferior ()->top_target ()->auxv_parse (readptr, endptr, |
322 | typep, valp); | |
c47ffbe3 VP |
323 | } |
324 | ||
865ecab4 | 325 | |
865ecab4 LM |
326 | /* Auxiliary Vector information structure. This is used by GDB |
327 | for caching purposes for each inferior. This helps reduce the | |
328 | overhead of transfering data from a remote target to the local host. */ | |
329 | struct auxv_info | |
330 | { | |
9018be22 | 331 | gdb::optional<gdb::byte_vector> data; |
865ecab4 LM |
332 | }; |
333 | ||
e9b89e2d TT |
334 | /* Per-inferior data key for auxv. */ |
335 | static const struct inferior_key<auxv_info> auxv_inferior_data; | |
865ecab4 LM |
336 | |
337 | /* Invalidate INF's auxv cache. */ | |
338 | ||
339 | static void | |
340 | invalidate_auxv_cache_inf (struct inferior *inf) | |
341 | { | |
e9b89e2d | 342 | auxv_inferior_data.clear (inf); |
865ecab4 LM |
343 | } |
344 | ||
345 | /* Invalidate current inferior's auxv cache. */ | |
346 | ||
347 | static void | |
348 | invalidate_auxv_cache (void) | |
349 | { | |
350 | invalidate_auxv_cache_inf (current_inferior ()); | |
351 | } | |
352 | ||
353 | /* Fetch the auxv object from inferior INF. If auxv is cached already, | |
354 | return a pointer to the cache. If not, fetch the auxv object from the | |
355 | target and cache it. This function always returns a valid INFO pointer. */ | |
356 | ||
357 | static struct auxv_info * | |
358 | get_auxv_inferior_data (struct target_ops *ops) | |
359 | { | |
360 | struct auxv_info *info; | |
361 | struct inferior *inf = current_inferior (); | |
362 | ||
e9b89e2d | 363 | info = auxv_inferior_data.get (inf); |
865ecab4 LM |
364 | if (info == NULL) |
365 | { | |
e9b89e2d | 366 | info = auxv_inferior_data.emplace (inf); |
9018be22 | 367 | info->data = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL); |
865ecab4 LM |
368 | } |
369 | ||
370 | return info; | |
371 | } | |
372 | ||
14ed0a8b RM |
373 | /* Extract the auxiliary vector entry with a_type matching MATCH. |
374 | Return zero if no such entry was found, or -1 if there was | |
375 | an error getting the information. On success, return 1 after | |
376 | storing the entry's value field in *VALP. */ | |
377 | int | |
378 | target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp) | |
379 | { | |
380 | CORE_ADDR type, val; | |
9018be22 | 381 | auxv_info *info = get_auxv_inferior_data (ops); |
865ecab4 | 382 | |
9018be22 SM |
383 | if (!info->data) |
384 | return -1; | |
14ed0a8b | 385 | |
9018be22 SM |
386 | gdb_byte *data = info->data->data (); |
387 | gdb_byte *ptr = data; | |
388 | size_t len = info->data->size (); | |
14ed0a8b RM |
389 | |
390 | while (1) | |
f6ac5f3d | 391 | switch (target_auxv_parse (&ptr, data + len, &type, &val)) |
14ed0a8b RM |
392 | { |
393 | case 1: /* Here's an entry, check it. */ | |
394 | if (type == match) | |
395 | { | |
14ed0a8b RM |
396 | *valp = val; |
397 | return 1; | |
398 | } | |
399 | break; | |
400 | case 0: /* End of the vector. */ | |
14ed0a8b RM |
401 | return 0; |
402 | default: /* Bogosity. */ | |
14ed0a8b RM |
403 | return -1; |
404 | } | |
405 | ||
406 | /*NOTREACHED*/ | |
407 | } | |
408 | ||
409 | ||
2faa3447 JB |
410 | /* Print the description of a single AUXV entry on the specified file. */ |
411 | ||
412 | void | |
413 | fprint_auxv_entry (struct ui_file *file, const char *name, | |
414 | const char *description, enum auxv_format format, | |
415 | CORE_ADDR type, CORE_ADDR val) | |
416 | { | |
6cb06a8c TT |
417 | gdb_printf (file, ("%-4s %-20s %-30s "), |
418 | plongest (type), name, description); | |
2faa3447 JB |
419 | switch (format) |
420 | { | |
421 | case AUXV_FORMAT_DEC: | |
6cb06a8c | 422 | gdb_printf (file, ("%s\n"), plongest (val)); |
2faa3447 JB |
423 | break; |
424 | case AUXV_FORMAT_HEX: | |
6cb06a8c | 425 | gdb_printf (file, ("%s\n"), paddress (target_gdbarch (), val)); |
2faa3447 JB |
426 | break; |
427 | case AUXV_FORMAT_STR: | |
428 | { | |
429 | struct value_print_options opts; | |
430 | ||
431 | get_user_print_options (&opts); | |
432 | if (opts.addressprint) | |
6cb06a8c | 433 | gdb_printf (file, ("%s "), paddress (target_gdbarch (), val)); |
2faa3447 JB |
434 | val_print_string (builtin_type (target_gdbarch ())->builtin_char, |
435 | NULL, val, -1, file, &opts); | |
6cb06a8c | 436 | gdb_printf (file, ("\n")); |
2faa3447 JB |
437 | } |
438 | break; | |
439 | } | |
440 | } | |
441 | ||
442 | /* The default implementation of gdbarch_print_auxv_entry. */ | |
443 | ||
444 | void | |
445 | default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, | |
446 | CORE_ADDR type, CORE_ADDR val) | |
447 | { | |
448 | const char *name = "???"; | |
449 | const char *description = ""; | |
450 | enum auxv_format format = AUXV_FORMAT_HEX; | |
451 | ||
452 | switch (type) | |
453 | { | |
454 | #define TAG(tag, text, kind) \ | |
455 | case tag: name = #tag; description = text; format = kind; break | |
456 | TAG (AT_NULL, _("End of vector"), AUXV_FORMAT_HEX); | |
457 | TAG (AT_IGNORE, _("Entry should be ignored"), AUXV_FORMAT_HEX); | |
458 | TAG (AT_EXECFD, _("File descriptor of program"), AUXV_FORMAT_DEC); | |
459 | TAG (AT_PHDR, _("Program headers for program"), AUXV_FORMAT_HEX); | |
460 | TAG (AT_PHENT, _("Size of program header entry"), AUXV_FORMAT_DEC); | |
461 | TAG (AT_PHNUM, _("Number of program headers"), AUXV_FORMAT_DEC); | |
462 | TAG (AT_PAGESZ, _("System page size"), AUXV_FORMAT_DEC); | |
463 | TAG (AT_BASE, _("Base address of interpreter"), AUXV_FORMAT_HEX); | |
464 | TAG (AT_FLAGS, _("Flags"), AUXV_FORMAT_HEX); | |
465 | TAG (AT_ENTRY, _("Entry point of program"), AUXV_FORMAT_HEX); | |
466 | TAG (AT_NOTELF, _("Program is not ELF"), AUXV_FORMAT_DEC); | |
467 | TAG (AT_UID, _("Real user ID"), AUXV_FORMAT_DEC); | |
468 | TAG (AT_EUID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
469 | TAG (AT_GID, _("Real group ID"), AUXV_FORMAT_DEC); | |
470 | TAG (AT_EGID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
471 | TAG (AT_CLKTCK, _("Frequency of times()"), AUXV_FORMAT_DEC); | |
472 | TAG (AT_PLATFORM, _("String identifying platform"), AUXV_FORMAT_STR); | |
473 | TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), | |
474 | AUXV_FORMAT_HEX); | |
475 | TAG (AT_FPUCW, _("Used FPU control word"), AUXV_FORMAT_DEC); | |
476 | TAG (AT_DCACHEBSIZE, _("Data cache block size"), AUXV_FORMAT_DEC); | |
477 | TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), AUXV_FORMAT_DEC); | |
478 | TAG (AT_UCACHEBSIZE, _("Unified cache block size"), AUXV_FORMAT_DEC); | |
479 | TAG (AT_IGNOREPPC, _("Entry should be ignored"), AUXV_FORMAT_DEC); | |
480 | TAG (AT_BASE_PLATFORM, _("String identifying base platform"), | |
481 | AUXV_FORMAT_STR); | |
482 | TAG (AT_RANDOM, _("Address of 16 random bytes"), AUXV_FORMAT_HEX); | |
483 | TAG (AT_HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX); | |
484 | TAG (AT_EXECFN, _("File name of executable"), AUXV_FORMAT_STR); | |
485 | TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), AUXV_FORMAT_DEC); | |
486 | TAG (AT_SYSINFO, _("Special system info/entry points"), AUXV_FORMAT_HEX); | |
487 | TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), | |
488 | AUXV_FORMAT_HEX); | |
489 | TAG (AT_L1I_CACHESHAPE, _("L1 Instruction cache information"), | |
490 | AUXV_FORMAT_HEX); | |
bb7b70ab LM |
491 | TAG (AT_L1I_CACHESIZE, _("L1 Instruction cache size"), AUXV_FORMAT_HEX); |
492 | TAG (AT_L1I_CACHEGEOMETRY, _("L1 Instruction cache geometry"), | |
493 | AUXV_FORMAT_HEX); | |
2faa3447 | 494 | TAG (AT_L1D_CACHESHAPE, _("L1 Data cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
495 | TAG (AT_L1D_CACHESIZE, _("L1 Data cache size"), AUXV_FORMAT_HEX); |
496 | TAG (AT_L1D_CACHEGEOMETRY, _("L1 Data cache geometry"), | |
497 | AUXV_FORMAT_HEX); | |
2faa3447 | 498 | TAG (AT_L2_CACHESHAPE, _("L2 cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
499 | TAG (AT_L2_CACHESIZE, _("L2 cache size"), AUXV_FORMAT_HEX); |
500 | TAG (AT_L2_CACHEGEOMETRY, _("L2 cache geometry"), AUXV_FORMAT_HEX); | |
2faa3447 | 501 | TAG (AT_L3_CACHESHAPE, _("L3 cache information"), AUXV_FORMAT_HEX); |
bb7b70ab LM |
502 | TAG (AT_L3_CACHESIZE, _("L3 cache size"), AUXV_FORMAT_HEX); |
503 | TAG (AT_L3_CACHEGEOMETRY, _("L3 cache geometry"), AUXV_FORMAT_HEX); | |
504 | TAG (AT_MINSIGSTKSZ, _("Minimum stack size for signal delivery"), | |
505 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
506 | TAG (AT_SUN_UID, _("Effective user ID"), AUXV_FORMAT_DEC); |
507 | TAG (AT_SUN_RUID, _("Real user ID"), AUXV_FORMAT_DEC); | |
508 | TAG (AT_SUN_GID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
509 | TAG (AT_SUN_RGID, _("Real group ID"), AUXV_FORMAT_DEC); | |
510 | TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), AUXV_FORMAT_HEX); | |
511 | TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), | |
512 | AUXV_FORMAT_HEX); | |
513 | TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), | |
514 | AUXV_FORMAT_STR); | |
515 | TAG (AT_SUN_LPAGESZ, _("Large pagesize"), AUXV_FORMAT_DEC); | |
516 | TAG (AT_SUN_PLATFORM, _("Platform name string"), AUXV_FORMAT_STR); | |
3d282ac3 | 517 | TAG (AT_SUN_CAP_HW1, _("Machine-dependent CPU capability hints"), |
2faa3447 JB |
518 | AUXV_FORMAT_HEX); |
519 | TAG (AT_SUN_IFLUSH, _("Should flush icache?"), AUXV_FORMAT_DEC); | |
520 | TAG (AT_SUN_CPU, _("CPU name string"), AUXV_FORMAT_STR); | |
521 | TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), AUXV_FORMAT_HEX); | |
522 | TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), | |
523 | AUXV_FORMAT_DEC); | |
524 | TAG (AT_SUN_EXECNAME, | |
525 | _("Canonicalized file name given to execve"), AUXV_FORMAT_STR); | |
526 | TAG (AT_SUN_MMU, _("String for name of MMU module"), AUXV_FORMAT_STR); | |
527 | TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), | |
528 | AUXV_FORMAT_HEX); | |
529 | TAG (AT_SUN_AUXFLAGS, | |
530 | _("AF_SUN_ flags passed from the kernel"), AUXV_FORMAT_HEX); | |
3d282ac3 RO |
531 | TAG (AT_SUN_EMULATOR, _("Name of emulation binary for runtime linker"), |
532 | AUXV_FORMAT_STR); | |
533 | TAG (AT_SUN_BRANDNAME, _("Name of brand library"), AUXV_FORMAT_STR); | |
534 | TAG (AT_SUN_BRAND_AUX1, _("Aux vector for brand modules 1"), | |
535 | AUXV_FORMAT_HEX); | |
536 | TAG (AT_SUN_BRAND_AUX2, _("Aux vector for brand modules 2"), | |
537 | AUXV_FORMAT_HEX); | |
538 | TAG (AT_SUN_BRAND_AUX3, _("Aux vector for brand modules 3"), | |
539 | AUXV_FORMAT_HEX); | |
540 | TAG (AT_SUN_CAP_HW2, _("Machine-dependent CPU capability hints 2"), | |
541 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
542 | } |
543 | ||
544 | fprint_auxv_entry (file, name, description, format, type, val); | |
545 | } | |
546 | ||
0e2de366 | 547 | /* Print the contents of the target's AUXV on the specified file. */ |
2faa3447 | 548 | |
14ed0a8b RM |
549 | int |
550 | fprint_target_auxv (struct ui_file *file, struct target_ops *ops) | |
551 | { | |
2faa3447 | 552 | struct gdbarch *gdbarch = target_gdbarch (); |
14ed0a8b | 553 | CORE_ADDR type, val; |
14ed0a8b | 554 | int ents = 0; |
9018be22 | 555 | auxv_info *info = get_auxv_inferior_data (ops); |
14ed0a8b | 556 | |
9018be22 SM |
557 | if (!info->data) |
558 | return -1; | |
14ed0a8b | 559 | |
9018be22 SM |
560 | gdb_byte *data = info->data->data (); |
561 | gdb_byte *ptr = data; | |
562 | size_t len = info->data->size (); | |
865ecab4 | 563 | |
f6ac5f3d | 564 | while (target_auxv_parse (&ptr, data + len, &type, &val) > 0) |
14ed0a8b | 565 | { |
2faa3447 | 566 | gdbarch_print_auxv_entry (gdbarch, file, type, val); |
14ed0a8b | 567 | ++ents; |
7c6467a4 PP |
568 | if (type == AT_NULL) |
569 | break; | |
14ed0a8b RM |
570 | } |
571 | ||
14ed0a8b RM |
572 | return ents; |
573 | } | |
574 | ||
575 | static void | |
1d12d88f | 576 | info_auxv_command (const char *cmd, int from_tty) |
14ed0a8b | 577 | { |
841de120 | 578 | if (! target_has_stack ()) |
edefbb7c | 579 | error (_("The program has no auxiliary information now.")); |
14ed0a8b RM |
580 | else |
581 | { | |
328d42d8 SM |
582 | int ents = fprint_target_auxv (gdb_stdout, |
583 | current_inferior ()->top_target ()); | |
5b4ee69b | 584 | |
14ed0a8b | 585 | if (ents < 0) |
edefbb7c | 586 | error (_("No auxiliary vector found, or failed reading it.")); |
14ed0a8b | 587 | else if (ents == 0) |
edefbb7c | 588 | error (_("Auxiliary vector is empty.")); |
14ed0a8b RM |
589 | } |
590 | } | |
591 | ||
6c265988 | 592 | void _initialize_auxv (); |
14ed0a8b | 593 | void |
6c265988 | 594 | _initialize_auxv () |
14ed0a8b RM |
595 | { |
596 | add_info ("auxv", info_auxv_command, | |
edefbb7c AC |
597 | _("Display the inferior's auxiliary vector.\n\ |
598 | This is information provided by the operating system at program startup.")); | |
865ecab4 | 599 | |
865ecab4 | 600 | /* Observers used to invalidate the auxv cache when needed. */ |
c90e7d63 SM |
601 | gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf, "auxv"); |
602 | gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf, "auxv"); | |
603 | gdb::observers::executable_changed.attach (invalidate_auxv_cache, "auxv"); | |
14ed0a8b | 604 | } |