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14ed0a8b RM |
1 | /* Auxiliary vector support for GDB, the GNU debugger. |
2 | ||
42a4f53d | 3 | Copyright (C) 2004-2019 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" | |
28 | #include "common/filestuff.h" | |
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 | { |
14ed0a8b | 49 | int fd; |
9b409511 | 50 | ssize_t l; |
14ed0a8b | 51 | |
528e1572 | 52 | std::string pathname = string_printf ("/proc/%d/auxv", inferior_ptid.pid ()); |
614c279d | 53 | fd = gdb_open_cloexec (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY, 0); |
14ed0a8b | 54 | if (fd < 0) |
2ed4b548 | 55 | return TARGET_XFER_E_IO; |
14ed0a8b RM |
56 | |
57 | if (offset != (ULONGEST) 0 | |
58 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
9b409511 | 59 | l = -1; |
14ed0a8b | 60 | else if (readbuf != NULL) |
9b409511 | 61 | l = read (fd, readbuf, (size_t) len); |
14ed0a8b | 62 | else |
9b409511 | 63 | l = write (fd, writebuf, (size_t) len); |
14ed0a8b RM |
64 | |
65 | (void) close (fd); | |
66 | ||
9b409511 YQ |
67 | if (l < 0) |
68 | return TARGET_XFER_E_IO; | |
69 | else if (l == 0) | |
70 | return TARGET_XFER_EOF; | |
71 | else | |
72 | { | |
73 | *xfered_len = (ULONGEST) l; | |
74 | return TARGET_XFER_OK; | |
75 | } | |
14ed0a8b RM |
76 | } |
77 | ||
9f2982ff JK |
78 | /* This function handles access via ld.so's symbol `_dl_auxv'. */ |
79 | ||
9b409511 | 80 | static enum target_xfer_status |
9f2982ff JK |
81 | ld_so_xfer_auxv (gdb_byte *readbuf, |
82 | const gdb_byte *writebuf, | |
83 | ULONGEST offset, | |
9b409511 | 84 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff | 85 | { |
3b7344d5 | 86 | struct bound_minimal_symbol msym; |
9f2982ff | 87 | CORE_ADDR data_address, pointer_address; |
f5656ead | 88 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9f2982ff JK |
89 | size_t ptr_size = TYPE_LENGTH (ptr_type); |
90 | size_t auxv_pair_size = 2 * ptr_size; | |
224c3ddb | 91 | gdb_byte *ptr_buf = (gdb_byte *) alloca (ptr_size); |
9f2982ff JK |
92 | LONGEST retval; |
93 | size_t block; | |
94 | ||
95 | msym = lookup_minimal_symbol ("_dl_auxv", NULL, NULL); | |
3b7344d5 | 96 | if (msym.minsym == NULL) |
2ed4b548 | 97 | return TARGET_XFER_E_IO; |
9f2982ff | 98 | |
3b7344d5 | 99 | if (MSYMBOL_SIZE (msym.minsym) != ptr_size) |
2ed4b548 | 100 | return TARGET_XFER_E_IO; |
9f2982ff | 101 | |
0e2de366 MS |
102 | /* POINTER_ADDRESS is a location where the `_dl_auxv' variable |
103 | resides. DATA_ADDRESS is the inferior value present in | |
104 | `_dl_auxv', therefore the real inferior AUXV address. */ | |
9f2982ff | 105 | |
77e371c0 | 106 | pointer_address = BMSYMBOL_VALUE_ADDRESS (msym); |
9f2982ff | 107 | |
3cd07d20 | 108 | /* The location of the _dl_auxv symbol may no longer be correct if |
0e2de366 MS |
109 | ld.so runs at a different address than the one present in the |
110 | file. This is very common case - for unprelinked ld.so or with a | |
111 | PIE executable. PIE executable forces random address even for | |
112 | libraries already being prelinked to some address. PIE | |
113 | executables themselves are never prelinked even on prelinked | |
114 | systems. Prelinking of a PIE executable would block their | |
115 | purpose of randomizing load of everything including the | |
116 | executable. | |
117 | ||
118 | If the memory read fails, return -1 to fallback on another | |
119 | mechanism for retrieving the AUXV. | |
120 | ||
121 | In most cases of a PIE running under valgrind there is no way to | |
122 | find out the base addresses of any of ld.so, executable or AUXV | |
123 | as everything is randomized and /proc information is not relevant | |
124 | for the virtual executable running under valgrind. We think that | |
125 | we might need a valgrind extension to make it work. This is PR | |
126 | 11440. */ | |
3cd07d20 JK |
127 | |
128 | if (target_read_memory (pointer_address, ptr_buf, ptr_size) != 0) | |
2ed4b548 | 129 | return TARGET_XFER_E_IO; |
3cd07d20 JK |
130 | |
131 | data_address = extract_typed_address (ptr_buf, ptr_type); | |
9f2982ff | 132 | |
0e2de366 MS |
133 | /* Possibly still not initialized such as during an inferior |
134 | startup. */ | |
9f2982ff | 135 | if (data_address == 0) |
2ed4b548 | 136 | return TARGET_XFER_E_IO; |
9f2982ff JK |
137 | |
138 | data_address += offset; | |
139 | ||
140 | if (writebuf != NULL) | |
141 | { | |
142 | if (target_write_memory (data_address, writebuf, len) == 0) | |
9b409511 YQ |
143 | { |
144 | *xfered_len = (ULONGEST) len; | |
145 | return TARGET_XFER_OK; | |
146 | } | |
9f2982ff | 147 | else |
2ed4b548 | 148 | return TARGET_XFER_E_IO; |
9f2982ff JK |
149 | } |
150 | ||
0e2de366 MS |
151 | /* Stop if trying to read past the existing AUXV block. The final |
152 | AT_NULL was already returned before. */ | |
9f2982ff JK |
153 | |
154 | if (offset >= auxv_pair_size) | |
155 | { | |
156 | if (target_read_memory (data_address - auxv_pair_size, ptr_buf, | |
157 | ptr_size) != 0) | |
2ed4b548 | 158 | return TARGET_XFER_E_IO; |
9f2982ff JK |
159 | |
160 | if (extract_typed_address (ptr_buf, ptr_type) == AT_NULL) | |
9b409511 | 161 | return TARGET_XFER_EOF; |
9f2982ff JK |
162 | } |
163 | ||
164 | retval = 0; | |
165 | block = 0x400; | |
166 | gdb_assert (block % auxv_pair_size == 0); | |
167 | ||
168 | while (len > 0) | |
169 | { | |
170 | if (block > len) | |
171 | block = len; | |
172 | ||
0e2de366 MS |
173 | /* Reading sizes smaller than AUXV_PAIR_SIZE is not supported. |
174 | Tails unaligned to AUXV_PAIR_SIZE will not be read during a | |
175 | call (they should be completed during next read with | |
176 | new/extended buffer). */ | |
9f2982ff JK |
177 | |
178 | block &= -auxv_pair_size; | |
179 | if (block == 0) | |
9b409511 | 180 | break; |
9f2982ff JK |
181 | |
182 | if (target_read_memory (data_address, readbuf, block) != 0) | |
183 | { | |
184 | if (block <= auxv_pair_size) | |
9b409511 | 185 | break; |
9f2982ff JK |
186 | |
187 | block = auxv_pair_size; | |
188 | continue; | |
189 | } | |
190 | ||
191 | data_address += block; | |
192 | len -= block; | |
193 | ||
0e2de366 MS |
194 | /* Check terminal AT_NULL. This function is being called |
195 | indefinitely being extended its READBUF until it returns EOF | |
196 | (0). */ | |
9f2982ff JK |
197 | |
198 | while (block >= auxv_pair_size) | |
199 | { | |
200 | retval += auxv_pair_size; | |
201 | ||
202 | if (extract_typed_address (readbuf, ptr_type) == AT_NULL) | |
9b409511 YQ |
203 | { |
204 | *xfered_len = (ULONGEST) retval; | |
205 | return TARGET_XFER_OK; | |
206 | } | |
9f2982ff JK |
207 | |
208 | readbuf += auxv_pair_size; | |
209 | block -= auxv_pair_size; | |
210 | } | |
211 | } | |
212 | ||
9b409511 YQ |
213 | *xfered_len = (ULONGEST) retval; |
214 | return TARGET_XFER_OK; | |
9f2982ff JK |
215 | } |
216 | ||
edcc890f YQ |
217 | /* Implement the to_xfer_partial target_ops method for |
218 | TARGET_OBJECT_AUXV. It handles access to AUXV. */ | |
9f2982ff | 219 | |
9b409511 | 220 | enum target_xfer_status |
9f2982ff JK |
221 | memory_xfer_auxv (struct target_ops *ops, |
222 | enum target_object object, | |
223 | const char *annex, | |
224 | gdb_byte *readbuf, | |
225 | const gdb_byte *writebuf, | |
226 | ULONGEST offset, | |
9b409511 | 227 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff JK |
228 | { |
229 | gdb_assert (object == TARGET_OBJECT_AUXV); | |
230 | gdb_assert (readbuf || writebuf); | |
231 | ||
0e2de366 MS |
232 | /* ld_so_xfer_auxv is the only function safe for virtual |
233 | executables being executed by valgrind's memcheck. Using | |
234 | ld_so_xfer_auxv during inferior startup is problematic, because | |
235 | ld.so symbol tables have not yet been relocated. So GDB uses | |
236 | this function only when attaching to a process. | |
86e4bafc | 237 | */ |
9f2982ff JK |
238 | |
239 | if (current_inferior ()->attach_flag != 0) | |
240 | { | |
9b409511 | 241 | enum target_xfer_status ret; |
9f2982ff | 242 | |
9b409511 YQ |
243 | ret = ld_so_xfer_auxv (readbuf, writebuf, offset, len, xfered_len); |
244 | if (ret != TARGET_XFER_E_IO) | |
245 | return ret; | |
9f2982ff JK |
246 | } |
247 | ||
9b409511 | 248 | return procfs_xfer_auxv (readbuf, writebuf, offset, len, xfered_len); |
9f2982ff JK |
249 | } |
250 | ||
14ed0a8b RM |
251 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. |
252 | Return 0 if *READPTR is already at the end of the buffer. | |
253 | Return -1 if there is insufficient buffer for a whole entry. | |
254 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
8de71aab | 255 | int |
c47ffbe3 | 256 | default_auxv_parse (struct target_ops *ops, gdb_byte **readptr, |
36aa5e41 | 257 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
14ed0a8b | 258 | { |
f5656ead | 259 | const int sizeof_auxv_field = gdbarch_ptr_bit (target_gdbarch ()) |
ffe5a37e | 260 | / TARGET_CHAR_BIT; |
f5656ead | 261 | const enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
36aa5e41 | 262 | gdb_byte *ptr = *readptr; |
14ed0a8b RM |
263 | |
264 | if (endptr == ptr) | |
265 | return 0; | |
266 | ||
267 | if (endptr - ptr < sizeof_auxv_field * 2) | |
268 | return -1; | |
269 | ||
e17a4113 | 270 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); |
14ed0a8b | 271 | ptr += sizeof_auxv_field; |
e17a4113 | 272 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); |
14ed0a8b RM |
273 | ptr += sizeof_auxv_field; |
274 | ||
275 | *readptr = ptr; | |
276 | return 1; | |
277 | } | |
278 | ||
c47ffbe3 VP |
279 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. |
280 | Return 0 if *READPTR is already at the end of the buffer. | |
281 | Return -1 if there is insufficient buffer for a whole entry. | |
282 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
283 | int | |
f6ac5f3d PA |
284 | target_auxv_parse (gdb_byte **readptr, |
285 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 286 | { |
27a48a92 MK |
287 | struct gdbarch *gdbarch = target_gdbarch(); |
288 | ||
289 | if (gdbarch_auxv_parse_p (gdbarch)) | |
290 | return gdbarch_auxv_parse (gdbarch, readptr, endptr, typep, valp); | |
291 | ||
8b88a78e | 292 | return current_top_target ()->auxv_parse (readptr, endptr, typep, valp); |
c47ffbe3 VP |
293 | } |
294 | ||
865ecab4 LM |
295 | |
296 | /* Per-inferior data key for auxv. */ | |
297 | static const struct inferior_data *auxv_inferior_data; | |
298 | ||
299 | /* Auxiliary Vector information structure. This is used by GDB | |
300 | for caching purposes for each inferior. This helps reduce the | |
301 | overhead of transfering data from a remote target to the local host. */ | |
302 | struct auxv_info | |
303 | { | |
9018be22 | 304 | gdb::optional<gdb::byte_vector> data; |
865ecab4 LM |
305 | }; |
306 | ||
307 | /* Handles the cleanup of the auxv cache for inferior INF. ARG is ignored. | |
308 | Frees whatever allocated space there is to be freed and sets INF's auxv cache | |
309 | data pointer to NULL. | |
310 | ||
311 | This function is called when the following events occur: inferior_appeared, | |
312 | inferior_exit and executable_changed. */ | |
313 | ||
314 | static void | |
315 | auxv_inferior_data_cleanup (struct inferior *inf, void *arg) | |
316 | { | |
317 | struct auxv_info *info; | |
318 | ||
9a3c8263 | 319 | info = (struct auxv_info *) inferior_data (inf, auxv_inferior_data); |
865ecab4 LM |
320 | if (info != NULL) |
321 | { | |
9018be22 | 322 | delete info; |
865ecab4 LM |
323 | set_inferior_data (inf, auxv_inferior_data, NULL); |
324 | } | |
325 | } | |
326 | ||
327 | /* Invalidate INF's auxv cache. */ | |
328 | ||
329 | static void | |
330 | invalidate_auxv_cache_inf (struct inferior *inf) | |
331 | { | |
332 | auxv_inferior_data_cleanup (inf, NULL); | |
333 | } | |
334 | ||
335 | /* Invalidate current inferior's auxv cache. */ | |
336 | ||
337 | static void | |
338 | invalidate_auxv_cache (void) | |
339 | { | |
340 | invalidate_auxv_cache_inf (current_inferior ()); | |
341 | } | |
342 | ||
343 | /* Fetch the auxv object from inferior INF. If auxv is cached already, | |
344 | return a pointer to the cache. If not, fetch the auxv object from the | |
345 | target and cache it. This function always returns a valid INFO pointer. */ | |
346 | ||
347 | static struct auxv_info * | |
348 | get_auxv_inferior_data (struct target_ops *ops) | |
349 | { | |
350 | struct auxv_info *info; | |
351 | struct inferior *inf = current_inferior (); | |
352 | ||
9a3c8263 | 353 | info = (struct auxv_info *) inferior_data (inf, auxv_inferior_data); |
865ecab4 LM |
354 | if (info == NULL) |
355 | { | |
9018be22 SM |
356 | info = new auxv_info; |
357 | info->data = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL); | |
865ecab4 LM |
358 | set_inferior_data (inf, auxv_inferior_data, info); |
359 | } | |
360 | ||
361 | return info; | |
362 | } | |
363 | ||
14ed0a8b RM |
364 | /* Extract the auxiliary vector entry with a_type matching MATCH. |
365 | Return zero if no such entry was found, or -1 if there was | |
366 | an error getting the information. On success, return 1 after | |
367 | storing the entry's value field in *VALP. */ | |
368 | int | |
369 | target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp) | |
370 | { | |
371 | CORE_ADDR type, val; | |
9018be22 | 372 | auxv_info *info = get_auxv_inferior_data (ops); |
865ecab4 | 373 | |
9018be22 SM |
374 | if (!info->data) |
375 | return -1; | |
14ed0a8b | 376 | |
9018be22 SM |
377 | gdb_byte *data = info->data->data (); |
378 | gdb_byte *ptr = data; | |
379 | size_t len = info->data->size (); | |
14ed0a8b RM |
380 | |
381 | while (1) | |
f6ac5f3d | 382 | switch (target_auxv_parse (&ptr, data + len, &type, &val)) |
14ed0a8b RM |
383 | { |
384 | case 1: /* Here's an entry, check it. */ | |
385 | if (type == match) | |
386 | { | |
14ed0a8b RM |
387 | *valp = val; |
388 | return 1; | |
389 | } | |
390 | break; | |
391 | case 0: /* End of the vector. */ | |
14ed0a8b RM |
392 | return 0; |
393 | default: /* Bogosity. */ | |
14ed0a8b RM |
394 | return -1; |
395 | } | |
396 | ||
397 | /*NOTREACHED*/ | |
398 | } | |
399 | ||
400 | ||
2faa3447 JB |
401 | /* Print the description of a single AUXV entry on the specified file. */ |
402 | ||
403 | void | |
404 | fprint_auxv_entry (struct ui_file *file, const char *name, | |
405 | const char *description, enum auxv_format format, | |
406 | CORE_ADDR type, CORE_ADDR val) | |
407 | { | |
408 | fprintf_filtered (file, ("%-4s %-20s %-30s "), | |
409 | plongest (type), name, description); | |
410 | switch (format) | |
411 | { | |
412 | case AUXV_FORMAT_DEC: | |
413 | fprintf_filtered (file, ("%s\n"), plongest (val)); | |
414 | break; | |
415 | case AUXV_FORMAT_HEX: | |
416 | fprintf_filtered (file, ("%s\n"), paddress (target_gdbarch (), val)); | |
417 | break; | |
418 | case AUXV_FORMAT_STR: | |
419 | { | |
420 | struct value_print_options opts; | |
421 | ||
422 | get_user_print_options (&opts); | |
423 | if (opts.addressprint) | |
424 | fprintf_filtered (file, ("%s "), paddress (target_gdbarch (), val)); | |
425 | val_print_string (builtin_type (target_gdbarch ())->builtin_char, | |
426 | NULL, val, -1, file, &opts); | |
427 | fprintf_filtered (file, ("\n")); | |
428 | } | |
429 | break; | |
430 | } | |
431 | } | |
432 | ||
433 | /* The default implementation of gdbarch_print_auxv_entry. */ | |
434 | ||
435 | void | |
436 | default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, | |
437 | CORE_ADDR type, CORE_ADDR val) | |
438 | { | |
439 | const char *name = "???"; | |
440 | const char *description = ""; | |
441 | enum auxv_format format = AUXV_FORMAT_HEX; | |
442 | ||
443 | switch (type) | |
444 | { | |
445 | #define TAG(tag, text, kind) \ | |
446 | case tag: name = #tag; description = text; format = kind; break | |
447 | TAG (AT_NULL, _("End of vector"), AUXV_FORMAT_HEX); | |
448 | TAG (AT_IGNORE, _("Entry should be ignored"), AUXV_FORMAT_HEX); | |
449 | TAG (AT_EXECFD, _("File descriptor of program"), AUXV_FORMAT_DEC); | |
450 | TAG (AT_PHDR, _("Program headers for program"), AUXV_FORMAT_HEX); | |
451 | TAG (AT_PHENT, _("Size of program header entry"), AUXV_FORMAT_DEC); | |
452 | TAG (AT_PHNUM, _("Number of program headers"), AUXV_FORMAT_DEC); | |
453 | TAG (AT_PAGESZ, _("System page size"), AUXV_FORMAT_DEC); | |
454 | TAG (AT_BASE, _("Base address of interpreter"), AUXV_FORMAT_HEX); | |
455 | TAG (AT_FLAGS, _("Flags"), AUXV_FORMAT_HEX); | |
456 | TAG (AT_ENTRY, _("Entry point of program"), AUXV_FORMAT_HEX); | |
457 | TAG (AT_NOTELF, _("Program is not ELF"), AUXV_FORMAT_DEC); | |
458 | TAG (AT_UID, _("Real user ID"), AUXV_FORMAT_DEC); | |
459 | TAG (AT_EUID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
460 | TAG (AT_GID, _("Real group ID"), AUXV_FORMAT_DEC); | |
461 | TAG (AT_EGID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
462 | TAG (AT_CLKTCK, _("Frequency of times()"), AUXV_FORMAT_DEC); | |
463 | TAG (AT_PLATFORM, _("String identifying platform"), AUXV_FORMAT_STR); | |
464 | TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), | |
465 | AUXV_FORMAT_HEX); | |
466 | TAG (AT_FPUCW, _("Used FPU control word"), AUXV_FORMAT_DEC); | |
467 | TAG (AT_DCACHEBSIZE, _("Data cache block size"), AUXV_FORMAT_DEC); | |
468 | TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), AUXV_FORMAT_DEC); | |
469 | TAG (AT_UCACHEBSIZE, _("Unified cache block size"), AUXV_FORMAT_DEC); | |
470 | TAG (AT_IGNOREPPC, _("Entry should be ignored"), AUXV_FORMAT_DEC); | |
471 | TAG (AT_BASE_PLATFORM, _("String identifying base platform"), | |
472 | AUXV_FORMAT_STR); | |
473 | TAG (AT_RANDOM, _("Address of 16 random bytes"), AUXV_FORMAT_HEX); | |
474 | TAG (AT_HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX); | |
475 | TAG (AT_EXECFN, _("File name of executable"), AUXV_FORMAT_STR); | |
476 | TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), AUXV_FORMAT_DEC); | |
477 | TAG (AT_SYSINFO, _("Special system info/entry points"), AUXV_FORMAT_HEX); | |
478 | TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), | |
479 | AUXV_FORMAT_HEX); | |
480 | TAG (AT_L1I_CACHESHAPE, _("L1 Instruction cache information"), | |
481 | AUXV_FORMAT_HEX); | |
482 | TAG (AT_L1D_CACHESHAPE, _("L1 Data cache information"), AUXV_FORMAT_HEX); | |
483 | TAG (AT_L2_CACHESHAPE, _("L2 cache information"), AUXV_FORMAT_HEX); | |
484 | TAG (AT_L3_CACHESHAPE, _("L3 cache information"), AUXV_FORMAT_HEX); | |
485 | TAG (AT_SUN_UID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
486 | TAG (AT_SUN_RUID, _("Real user ID"), AUXV_FORMAT_DEC); | |
487 | TAG (AT_SUN_GID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
488 | TAG (AT_SUN_RGID, _("Real group ID"), AUXV_FORMAT_DEC); | |
489 | TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), AUXV_FORMAT_HEX); | |
490 | TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), | |
491 | AUXV_FORMAT_HEX); | |
492 | TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), | |
493 | AUXV_FORMAT_STR); | |
494 | TAG (AT_SUN_LPAGESZ, _("Large pagesize"), AUXV_FORMAT_DEC); | |
495 | TAG (AT_SUN_PLATFORM, _("Platform name string"), AUXV_FORMAT_STR); | |
3d282ac3 | 496 | TAG (AT_SUN_CAP_HW1, _("Machine-dependent CPU capability hints"), |
2faa3447 JB |
497 | AUXV_FORMAT_HEX); |
498 | TAG (AT_SUN_IFLUSH, _("Should flush icache?"), AUXV_FORMAT_DEC); | |
499 | TAG (AT_SUN_CPU, _("CPU name string"), AUXV_FORMAT_STR); | |
500 | TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), AUXV_FORMAT_HEX); | |
501 | TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), | |
502 | AUXV_FORMAT_DEC); | |
503 | TAG (AT_SUN_EXECNAME, | |
504 | _("Canonicalized file name given to execve"), AUXV_FORMAT_STR); | |
505 | TAG (AT_SUN_MMU, _("String for name of MMU module"), AUXV_FORMAT_STR); | |
506 | TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), | |
507 | AUXV_FORMAT_HEX); | |
508 | TAG (AT_SUN_AUXFLAGS, | |
509 | _("AF_SUN_ flags passed from the kernel"), AUXV_FORMAT_HEX); | |
3d282ac3 RO |
510 | TAG (AT_SUN_EMULATOR, _("Name of emulation binary for runtime linker"), |
511 | AUXV_FORMAT_STR); | |
512 | TAG (AT_SUN_BRANDNAME, _("Name of brand library"), AUXV_FORMAT_STR); | |
513 | TAG (AT_SUN_BRAND_AUX1, _("Aux vector for brand modules 1"), | |
514 | AUXV_FORMAT_HEX); | |
515 | TAG (AT_SUN_BRAND_AUX2, _("Aux vector for brand modules 2"), | |
516 | AUXV_FORMAT_HEX); | |
517 | TAG (AT_SUN_BRAND_AUX3, _("Aux vector for brand modules 3"), | |
518 | AUXV_FORMAT_HEX); | |
519 | TAG (AT_SUN_CAP_HW2, _("Machine-dependent CPU capability hints 2"), | |
520 | AUXV_FORMAT_HEX); | |
2faa3447 JB |
521 | } |
522 | ||
523 | fprint_auxv_entry (file, name, description, format, type, val); | |
524 | } | |
525 | ||
0e2de366 | 526 | /* Print the contents of the target's AUXV on the specified file. */ |
2faa3447 | 527 | |
14ed0a8b RM |
528 | int |
529 | fprint_target_auxv (struct ui_file *file, struct target_ops *ops) | |
530 | { | |
2faa3447 | 531 | struct gdbarch *gdbarch = target_gdbarch (); |
14ed0a8b | 532 | CORE_ADDR type, val; |
14ed0a8b | 533 | int ents = 0; |
9018be22 | 534 | auxv_info *info = get_auxv_inferior_data (ops); |
14ed0a8b | 535 | |
9018be22 SM |
536 | if (!info->data) |
537 | return -1; | |
14ed0a8b | 538 | |
9018be22 SM |
539 | gdb_byte *data = info->data->data (); |
540 | gdb_byte *ptr = data; | |
541 | size_t len = info->data->size (); | |
865ecab4 | 542 | |
f6ac5f3d | 543 | while (target_auxv_parse (&ptr, data + len, &type, &val) > 0) |
14ed0a8b | 544 | { |
2faa3447 | 545 | gdbarch_print_auxv_entry (gdbarch, file, type, val); |
14ed0a8b | 546 | ++ents; |
7c6467a4 PP |
547 | if (type == AT_NULL) |
548 | break; | |
14ed0a8b RM |
549 | } |
550 | ||
14ed0a8b RM |
551 | return ents; |
552 | } | |
553 | ||
554 | static void | |
1d12d88f | 555 | info_auxv_command (const char *cmd, int from_tty) |
14ed0a8b | 556 | { |
14ed0a8b | 557 | if (! target_has_stack) |
edefbb7c | 558 | error (_("The program has no auxiliary information now.")); |
14ed0a8b RM |
559 | else |
560 | { | |
8b88a78e | 561 | int ents = fprint_target_auxv (gdb_stdout, current_top_target ()); |
5b4ee69b | 562 | |
14ed0a8b | 563 | if (ents < 0) |
edefbb7c | 564 | error (_("No auxiliary vector found, or failed reading it.")); |
14ed0a8b | 565 | else if (ents == 0) |
edefbb7c | 566 | error (_("Auxiliary vector is empty.")); |
14ed0a8b RM |
567 | } |
568 | } | |
569 | ||
14ed0a8b RM |
570 | void |
571 | _initialize_auxv (void) | |
572 | { | |
573 | add_info ("auxv", info_auxv_command, | |
edefbb7c AC |
574 | _("Display the inferior's auxiliary vector.\n\ |
575 | This is information provided by the operating system at program startup.")); | |
865ecab4 LM |
576 | |
577 | /* Set an auxv cache per-inferior. */ | |
578 | auxv_inferior_data | |
8e260fc0 | 579 | = register_inferior_data_with_cleanup (NULL, auxv_inferior_data_cleanup); |
865ecab4 LM |
580 | |
581 | /* Observers used to invalidate the auxv cache when needed. */ | |
76727919 TT |
582 | gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf); |
583 | gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf); | |
584 | gdb::observers::executable_changed.attach (invalidate_auxv_cache); | |
14ed0a8b | 585 | } |