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14ed0a8b RM |
1 | /* Auxiliary vector support for GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright (C) 2004-2018 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" | |
21 | #include "target.h" | |
22 | #include "gdbtypes.h" | |
23 | #include "command.h" | |
24 | #include "inferior.h" | |
25 | #include "valprint.h" | |
9f2982ff | 26 | #include "gdbcore.h" |
76727919 | 27 | #include "observable.h" |
614c279d | 28 | #include "filestuff.h" |
77e371c0 | 29 | #include "objfiles.h" |
14ed0a8b RM |
30 | |
31 | #include "auxv.h" | |
32 | #include "elf/common.h" | |
33 | ||
34 | #include <unistd.h> | |
35 | #include <fcntl.h> | |
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 RM |
48 | { |
49 | char *pathname; | |
50 | int fd; | |
9b409511 | 51 | ssize_t l; |
14ed0a8b | 52 | |
dfd4cc63 | 53 | pathname = xstrprintf ("/proc/%d/auxv", ptid_get_pid (inferior_ptid)); |
614c279d | 54 | fd = gdb_open_cloexec (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY, 0); |
14ed0a8b RM |
55 | xfree (pathname); |
56 | if (fd < 0) | |
2ed4b548 | 57 | return TARGET_XFER_E_IO; |
14ed0a8b RM |
58 | |
59 | if (offset != (ULONGEST) 0 | |
60 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
9b409511 | 61 | l = -1; |
14ed0a8b | 62 | else if (readbuf != NULL) |
9b409511 | 63 | l = read (fd, readbuf, (size_t) len); |
14ed0a8b | 64 | else |
9b409511 | 65 | l = write (fd, writebuf, (size_t) len); |
14ed0a8b RM |
66 | |
67 | (void) close (fd); | |
68 | ||
9b409511 YQ |
69 | if (l < 0) |
70 | return TARGET_XFER_E_IO; | |
71 | else if (l == 0) | |
72 | return TARGET_XFER_EOF; | |
73 | else | |
74 | { | |
75 | *xfered_len = (ULONGEST) l; | |
76 | return TARGET_XFER_OK; | |
77 | } | |
14ed0a8b RM |
78 | } |
79 | ||
9f2982ff JK |
80 | /* This function handles access via ld.so's symbol `_dl_auxv'. */ |
81 | ||
9b409511 | 82 | static enum target_xfer_status |
9f2982ff JK |
83 | ld_so_xfer_auxv (gdb_byte *readbuf, |
84 | const gdb_byte *writebuf, | |
85 | ULONGEST offset, | |
9b409511 | 86 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff | 87 | { |
3b7344d5 | 88 | struct bound_minimal_symbol msym; |
9f2982ff | 89 | CORE_ADDR data_address, pointer_address; |
f5656ead | 90 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9f2982ff JK |
91 | size_t ptr_size = TYPE_LENGTH (ptr_type); |
92 | size_t auxv_pair_size = 2 * ptr_size; | |
224c3ddb | 93 | gdb_byte *ptr_buf = (gdb_byte *) alloca (ptr_size); |
9f2982ff JK |
94 | LONGEST retval; |
95 | size_t block; | |
96 | ||
97 | msym = lookup_minimal_symbol ("_dl_auxv", NULL, NULL); | |
3b7344d5 | 98 | if (msym.minsym == NULL) |
2ed4b548 | 99 | return TARGET_XFER_E_IO; |
9f2982ff | 100 | |
3b7344d5 | 101 | if (MSYMBOL_SIZE (msym.minsym) != ptr_size) |
2ed4b548 | 102 | return TARGET_XFER_E_IO; |
9f2982ff | 103 | |
0e2de366 MS |
104 | /* POINTER_ADDRESS is a location where the `_dl_auxv' variable |
105 | resides. DATA_ADDRESS is the inferior value present in | |
106 | `_dl_auxv', therefore the real inferior AUXV address. */ | |
9f2982ff | 107 | |
77e371c0 | 108 | pointer_address = BMSYMBOL_VALUE_ADDRESS (msym); |
9f2982ff | 109 | |
3cd07d20 | 110 | /* The location of the _dl_auxv symbol may no longer be correct if |
0e2de366 MS |
111 | ld.so runs at a different address than the one present in the |
112 | file. This is very common case - for unprelinked ld.so or with a | |
113 | PIE executable. PIE executable forces random address even for | |
114 | libraries already being prelinked to some address. PIE | |
115 | executables themselves are never prelinked even on prelinked | |
116 | systems. Prelinking of a PIE executable would block their | |
117 | purpose of randomizing load of everything including the | |
118 | executable. | |
119 | ||
120 | If the memory read fails, return -1 to fallback on another | |
121 | mechanism for retrieving the AUXV. | |
122 | ||
123 | In most cases of a PIE running under valgrind there is no way to | |
124 | find out the base addresses of any of ld.so, executable or AUXV | |
125 | as everything is randomized and /proc information is not relevant | |
126 | for the virtual executable running under valgrind. We think that | |
127 | we might need a valgrind extension to make it work. This is PR | |
128 | 11440. */ | |
3cd07d20 JK |
129 | |
130 | if (target_read_memory (pointer_address, ptr_buf, ptr_size) != 0) | |
2ed4b548 | 131 | return TARGET_XFER_E_IO; |
3cd07d20 JK |
132 | |
133 | data_address = extract_typed_address (ptr_buf, ptr_type); | |
9f2982ff | 134 | |
0e2de366 MS |
135 | /* Possibly still not initialized such as during an inferior |
136 | startup. */ | |
9f2982ff | 137 | if (data_address == 0) |
2ed4b548 | 138 | return TARGET_XFER_E_IO; |
9f2982ff JK |
139 | |
140 | data_address += offset; | |
141 | ||
142 | if (writebuf != NULL) | |
143 | { | |
144 | if (target_write_memory (data_address, writebuf, len) == 0) | |
9b409511 YQ |
145 | { |
146 | *xfered_len = (ULONGEST) len; | |
147 | return TARGET_XFER_OK; | |
148 | } | |
9f2982ff | 149 | else |
2ed4b548 | 150 | return TARGET_XFER_E_IO; |
9f2982ff JK |
151 | } |
152 | ||
0e2de366 MS |
153 | /* Stop if trying to read past the existing AUXV block. The final |
154 | AT_NULL was already returned before. */ | |
9f2982ff JK |
155 | |
156 | if (offset >= auxv_pair_size) | |
157 | { | |
158 | if (target_read_memory (data_address - auxv_pair_size, ptr_buf, | |
159 | ptr_size) != 0) | |
2ed4b548 | 160 | return TARGET_XFER_E_IO; |
9f2982ff JK |
161 | |
162 | if (extract_typed_address (ptr_buf, ptr_type) == AT_NULL) | |
9b409511 | 163 | return TARGET_XFER_EOF; |
9f2982ff JK |
164 | } |
165 | ||
166 | retval = 0; | |
167 | block = 0x400; | |
168 | gdb_assert (block % auxv_pair_size == 0); | |
169 | ||
170 | while (len > 0) | |
171 | { | |
172 | if (block > len) | |
173 | block = len; | |
174 | ||
0e2de366 MS |
175 | /* Reading sizes smaller than AUXV_PAIR_SIZE is not supported. |
176 | Tails unaligned to AUXV_PAIR_SIZE will not be read during a | |
177 | call (they should be completed during next read with | |
178 | new/extended buffer). */ | |
9f2982ff JK |
179 | |
180 | block &= -auxv_pair_size; | |
181 | if (block == 0) | |
9b409511 | 182 | break; |
9f2982ff JK |
183 | |
184 | if (target_read_memory (data_address, readbuf, block) != 0) | |
185 | { | |
186 | if (block <= auxv_pair_size) | |
9b409511 | 187 | break; |
9f2982ff JK |
188 | |
189 | block = auxv_pair_size; | |
190 | continue; | |
191 | } | |
192 | ||
193 | data_address += block; | |
194 | len -= block; | |
195 | ||
0e2de366 MS |
196 | /* Check terminal AT_NULL. This function is being called |
197 | indefinitely being extended its READBUF until it returns EOF | |
198 | (0). */ | |
9f2982ff JK |
199 | |
200 | while (block >= auxv_pair_size) | |
201 | { | |
202 | retval += auxv_pair_size; | |
203 | ||
204 | if (extract_typed_address (readbuf, ptr_type) == AT_NULL) | |
9b409511 YQ |
205 | { |
206 | *xfered_len = (ULONGEST) retval; | |
207 | return TARGET_XFER_OK; | |
208 | } | |
9f2982ff JK |
209 | |
210 | readbuf += auxv_pair_size; | |
211 | block -= auxv_pair_size; | |
212 | } | |
213 | } | |
214 | ||
9b409511 YQ |
215 | *xfered_len = (ULONGEST) retval; |
216 | return TARGET_XFER_OK; | |
9f2982ff JK |
217 | } |
218 | ||
edcc890f YQ |
219 | /* Implement the to_xfer_partial target_ops method for |
220 | TARGET_OBJECT_AUXV. It handles access to AUXV. */ | |
9f2982ff | 221 | |
9b409511 | 222 | enum target_xfer_status |
9f2982ff JK |
223 | memory_xfer_auxv (struct target_ops *ops, |
224 | enum target_object object, | |
225 | const char *annex, | |
226 | gdb_byte *readbuf, | |
227 | const gdb_byte *writebuf, | |
228 | ULONGEST offset, | |
9b409511 | 229 | ULONGEST len, ULONGEST *xfered_len) |
9f2982ff JK |
230 | { |
231 | gdb_assert (object == TARGET_OBJECT_AUXV); | |
232 | gdb_assert (readbuf || writebuf); | |
233 | ||
0e2de366 MS |
234 | /* ld_so_xfer_auxv is the only function safe for virtual |
235 | executables being executed by valgrind's memcheck. Using | |
236 | ld_so_xfer_auxv during inferior startup is problematic, because | |
237 | ld.so symbol tables have not yet been relocated. So GDB uses | |
238 | this function only when attaching to a process. | |
86e4bafc | 239 | */ |
9f2982ff JK |
240 | |
241 | if (current_inferior ()->attach_flag != 0) | |
242 | { | |
9b409511 | 243 | enum target_xfer_status ret; |
9f2982ff | 244 | |
9b409511 YQ |
245 | ret = ld_so_xfer_auxv (readbuf, writebuf, offset, len, xfered_len); |
246 | if (ret != TARGET_XFER_E_IO) | |
247 | return ret; | |
9f2982ff JK |
248 | } |
249 | ||
9b409511 | 250 | return procfs_xfer_auxv (readbuf, writebuf, offset, len, xfered_len); |
9f2982ff JK |
251 | } |
252 | ||
14ed0a8b RM |
253 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. |
254 | Return 0 if *READPTR is already at the end of the buffer. | |
255 | Return -1 if there is insufficient buffer for a whole entry. | |
256 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
8de71aab | 257 | int |
c47ffbe3 | 258 | default_auxv_parse (struct target_ops *ops, gdb_byte **readptr, |
36aa5e41 | 259 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
14ed0a8b | 260 | { |
f5656ead | 261 | const int sizeof_auxv_field = gdbarch_ptr_bit (target_gdbarch ()) |
ffe5a37e | 262 | / TARGET_CHAR_BIT; |
f5656ead | 263 | const enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
36aa5e41 | 264 | gdb_byte *ptr = *readptr; |
14ed0a8b RM |
265 | |
266 | if (endptr == ptr) | |
267 | return 0; | |
268 | ||
269 | if (endptr - ptr < sizeof_auxv_field * 2) | |
270 | return -1; | |
271 | ||
e17a4113 | 272 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); |
14ed0a8b | 273 | ptr += sizeof_auxv_field; |
e17a4113 | 274 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); |
14ed0a8b RM |
275 | ptr += sizeof_auxv_field; |
276 | ||
277 | *readptr = ptr; | |
278 | return 1; | |
279 | } | |
280 | ||
c47ffbe3 VP |
281 | /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. |
282 | Return 0 if *READPTR is already at the end of the buffer. | |
283 | Return -1 if there is insufficient buffer for a whole entry. | |
284 | Return 1 if an entry was read into *TYPEP and *VALP. */ | |
285 | int | |
f6ac5f3d PA |
286 | target_auxv_parse (gdb_byte **readptr, |
287 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
c47ffbe3 | 288 | { |
27a48a92 MK |
289 | struct gdbarch *gdbarch = target_gdbarch(); |
290 | ||
291 | if (gdbarch_auxv_parse_p (gdbarch)) | |
292 | return gdbarch_auxv_parse (gdbarch, readptr, endptr, typep, valp); | |
293 | ||
f6ac5f3d | 294 | return target_stack->auxv_parse (readptr, endptr, typep, valp); |
c47ffbe3 VP |
295 | } |
296 | ||
865ecab4 LM |
297 | |
298 | /* Per-inferior data key for auxv. */ | |
299 | static const struct inferior_data *auxv_inferior_data; | |
300 | ||
301 | /* Auxiliary Vector information structure. This is used by GDB | |
302 | for caching purposes for each inferior. This helps reduce the | |
303 | overhead of transfering data from a remote target to the local host. */ | |
304 | struct auxv_info | |
305 | { | |
9018be22 | 306 | gdb::optional<gdb::byte_vector> data; |
865ecab4 LM |
307 | }; |
308 | ||
309 | /* Handles the cleanup of the auxv cache for inferior INF. ARG is ignored. | |
310 | Frees whatever allocated space there is to be freed and sets INF's auxv cache | |
311 | data pointer to NULL. | |
312 | ||
313 | This function is called when the following events occur: inferior_appeared, | |
314 | inferior_exit and executable_changed. */ | |
315 | ||
316 | static void | |
317 | auxv_inferior_data_cleanup (struct inferior *inf, void *arg) | |
318 | { | |
319 | struct auxv_info *info; | |
320 | ||
9a3c8263 | 321 | info = (struct auxv_info *) inferior_data (inf, auxv_inferior_data); |
865ecab4 LM |
322 | if (info != NULL) |
323 | { | |
9018be22 | 324 | delete info; |
865ecab4 LM |
325 | set_inferior_data (inf, auxv_inferior_data, NULL); |
326 | } | |
327 | } | |
328 | ||
329 | /* Invalidate INF's auxv cache. */ | |
330 | ||
331 | static void | |
332 | invalidate_auxv_cache_inf (struct inferior *inf) | |
333 | { | |
334 | auxv_inferior_data_cleanup (inf, NULL); | |
335 | } | |
336 | ||
337 | /* Invalidate current inferior's auxv cache. */ | |
338 | ||
339 | static void | |
340 | invalidate_auxv_cache (void) | |
341 | { | |
342 | invalidate_auxv_cache_inf (current_inferior ()); | |
343 | } | |
344 | ||
345 | /* Fetch the auxv object from inferior INF. If auxv is cached already, | |
346 | return a pointer to the cache. If not, fetch the auxv object from the | |
347 | target and cache it. This function always returns a valid INFO pointer. */ | |
348 | ||
349 | static struct auxv_info * | |
350 | get_auxv_inferior_data (struct target_ops *ops) | |
351 | { | |
352 | struct auxv_info *info; | |
353 | struct inferior *inf = current_inferior (); | |
354 | ||
9a3c8263 | 355 | info = (struct auxv_info *) inferior_data (inf, auxv_inferior_data); |
865ecab4 LM |
356 | if (info == NULL) |
357 | { | |
9018be22 SM |
358 | info = new auxv_info; |
359 | info->data = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL); | |
865ecab4 LM |
360 | set_inferior_data (inf, auxv_inferior_data, info); |
361 | } | |
362 | ||
363 | return info; | |
364 | } | |
365 | ||
14ed0a8b RM |
366 | /* Extract the auxiliary vector entry with a_type matching MATCH. |
367 | Return zero if no such entry was found, or -1 if there was | |
368 | an error getting the information. On success, return 1 after | |
369 | storing the entry's value field in *VALP. */ | |
370 | int | |
371 | target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp) | |
372 | { | |
373 | CORE_ADDR type, val; | |
9018be22 | 374 | auxv_info *info = get_auxv_inferior_data (ops); |
865ecab4 | 375 | |
9018be22 SM |
376 | if (!info->data) |
377 | return -1; | |
14ed0a8b | 378 | |
9018be22 SM |
379 | gdb_byte *data = info->data->data (); |
380 | gdb_byte *ptr = data; | |
381 | size_t len = info->data->size (); | |
14ed0a8b RM |
382 | |
383 | while (1) | |
f6ac5f3d | 384 | switch (target_auxv_parse (&ptr, data + len, &type, &val)) |
14ed0a8b RM |
385 | { |
386 | case 1: /* Here's an entry, check it. */ | |
387 | if (type == match) | |
388 | { | |
14ed0a8b RM |
389 | *valp = val; |
390 | return 1; | |
391 | } | |
392 | break; | |
393 | case 0: /* End of the vector. */ | |
14ed0a8b RM |
394 | return 0; |
395 | default: /* Bogosity. */ | |
14ed0a8b RM |
396 | return -1; |
397 | } | |
398 | ||
399 | /*NOTREACHED*/ | |
400 | } | |
401 | ||
402 | ||
2faa3447 JB |
403 | /* Print the description of a single AUXV entry on the specified file. */ |
404 | ||
405 | void | |
406 | fprint_auxv_entry (struct ui_file *file, const char *name, | |
407 | const char *description, enum auxv_format format, | |
408 | CORE_ADDR type, CORE_ADDR val) | |
409 | { | |
410 | fprintf_filtered (file, ("%-4s %-20s %-30s "), | |
411 | plongest (type), name, description); | |
412 | switch (format) | |
413 | { | |
414 | case AUXV_FORMAT_DEC: | |
415 | fprintf_filtered (file, ("%s\n"), plongest (val)); | |
416 | break; | |
417 | case AUXV_FORMAT_HEX: | |
418 | fprintf_filtered (file, ("%s\n"), paddress (target_gdbarch (), val)); | |
419 | break; | |
420 | case AUXV_FORMAT_STR: | |
421 | { | |
422 | struct value_print_options opts; | |
423 | ||
424 | get_user_print_options (&opts); | |
425 | if (opts.addressprint) | |
426 | fprintf_filtered (file, ("%s "), paddress (target_gdbarch (), val)); | |
427 | val_print_string (builtin_type (target_gdbarch ())->builtin_char, | |
428 | NULL, val, -1, file, &opts); | |
429 | fprintf_filtered (file, ("\n")); | |
430 | } | |
431 | break; | |
432 | } | |
433 | } | |
434 | ||
435 | /* The default implementation of gdbarch_print_auxv_entry. */ | |
436 | ||
437 | void | |
438 | default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, | |
439 | CORE_ADDR type, CORE_ADDR val) | |
440 | { | |
441 | const char *name = "???"; | |
442 | const char *description = ""; | |
443 | enum auxv_format format = AUXV_FORMAT_HEX; | |
444 | ||
445 | switch (type) | |
446 | { | |
447 | #define TAG(tag, text, kind) \ | |
448 | case tag: name = #tag; description = text; format = kind; break | |
449 | TAG (AT_NULL, _("End of vector"), AUXV_FORMAT_HEX); | |
450 | TAG (AT_IGNORE, _("Entry should be ignored"), AUXV_FORMAT_HEX); | |
451 | TAG (AT_EXECFD, _("File descriptor of program"), AUXV_FORMAT_DEC); | |
452 | TAG (AT_PHDR, _("Program headers for program"), AUXV_FORMAT_HEX); | |
453 | TAG (AT_PHENT, _("Size of program header entry"), AUXV_FORMAT_DEC); | |
454 | TAG (AT_PHNUM, _("Number of program headers"), AUXV_FORMAT_DEC); | |
455 | TAG (AT_PAGESZ, _("System page size"), AUXV_FORMAT_DEC); | |
456 | TAG (AT_BASE, _("Base address of interpreter"), AUXV_FORMAT_HEX); | |
457 | TAG (AT_FLAGS, _("Flags"), AUXV_FORMAT_HEX); | |
458 | TAG (AT_ENTRY, _("Entry point of program"), AUXV_FORMAT_HEX); | |
459 | TAG (AT_NOTELF, _("Program is not ELF"), AUXV_FORMAT_DEC); | |
460 | TAG (AT_UID, _("Real user ID"), AUXV_FORMAT_DEC); | |
461 | TAG (AT_EUID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
462 | TAG (AT_GID, _("Real group ID"), AUXV_FORMAT_DEC); | |
463 | TAG (AT_EGID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
464 | TAG (AT_CLKTCK, _("Frequency of times()"), AUXV_FORMAT_DEC); | |
465 | TAG (AT_PLATFORM, _("String identifying platform"), AUXV_FORMAT_STR); | |
466 | TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), | |
467 | AUXV_FORMAT_HEX); | |
468 | TAG (AT_FPUCW, _("Used FPU control word"), AUXV_FORMAT_DEC); | |
469 | TAG (AT_DCACHEBSIZE, _("Data cache block size"), AUXV_FORMAT_DEC); | |
470 | TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), AUXV_FORMAT_DEC); | |
471 | TAG (AT_UCACHEBSIZE, _("Unified cache block size"), AUXV_FORMAT_DEC); | |
472 | TAG (AT_IGNOREPPC, _("Entry should be ignored"), AUXV_FORMAT_DEC); | |
473 | TAG (AT_BASE_PLATFORM, _("String identifying base platform"), | |
474 | AUXV_FORMAT_STR); | |
475 | TAG (AT_RANDOM, _("Address of 16 random bytes"), AUXV_FORMAT_HEX); | |
476 | TAG (AT_HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX); | |
477 | TAG (AT_EXECFN, _("File name of executable"), AUXV_FORMAT_STR); | |
478 | TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), AUXV_FORMAT_DEC); | |
479 | TAG (AT_SYSINFO, _("Special system info/entry points"), AUXV_FORMAT_HEX); | |
480 | TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), | |
481 | AUXV_FORMAT_HEX); | |
482 | TAG (AT_L1I_CACHESHAPE, _("L1 Instruction cache information"), | |
483 | AUXV_FORMAT_HEX); | |
484 | TAG (AT_L1D_CACHESHAPE, _("L1 Data cache information"), AUXV_FORMAT_HEX); | |
485 | TAG (AT_L2_CACHESHAPE, _("L2 cache information"), AUXV_FORMAT_HEX); | |
486 | TAG (AT_L3_CACHESHAPE, _("L3 cache information"), AUXV_FORMAT_HEX); | |
487 | TAG (AT_SUN_UID, _("Effective user ID"), AUXV_FORMAT_DEC); | |
488 | TAG (AT_SUN_RUID, _("Real user ID"), AUXV_FORMAT_DEC); | |
489 | TAG (AT_SUN_GID, _("Effective group ID"), AUXV_FORMAT_DEC); | |
490 | TAG (AT_SUN_RGID, _("Real group ID"), AUXV_FORMAT_DEC); | |
491 | TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), AUXV_FORMAT_HEX); | |
492 | TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), | |
493 | AUXV_FORMAT_HEX); | |
494 | TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), | |
495 | AUXV_FORMAT_STR); | |
496 | TAG (AT_SUN_LPAGESZ, _("Large pagesize"), AUXV_FORMAT_DEC); | |
497 | TAG (AT_SUN_PLATFORM, _("Platform name string"), AUXV_FORMAT_STR); | |
498 | TAG (AT_SUN_HWCAP, _("Machine-dependent CPU capability hints"), | |
499 | AUXV_FORMAT_HEX); | |
500 | TAG (AT_SUN_IFLUSH, _("Should flush icache?"), AUXV_FORMAT_DEC); | |
501 | TAG (AT_SUN_CPU, _("CPU name string"), AUXV_FORMAT_STR); | |
502 | TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), AUXV_FORMAT_HEX); | |
503 | TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), | |
504 | AUXV_FORMAT_DEC); | |
505 | TAG (AT_SUN_EXECNAME, | |
506 | _("Canonicalized file name given to execve"), AUXV_FORMAT_STR); | |
507 | TAG (AT_SUN_MMU, _("String for name of MMU module"), AUXV_FORMAT_STR); | |
508 | TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), | |
509 | AUXV_FORMAT_HEX); | |
510 | TAG (AT_SUN_AUXFLAGS, | |
511 | _("AF_SUN_ flags passed from the kernel"), AUXV_FORMAT_HEX); | |
512 | } | |
513 | ||
514 | fprint_auxv_entry (file, name, description, format, type, val); | |
515 | } | |
516 | ||
0e2de366 | 517 | /* Print the contents of the target's AUXV on the specified file. */ |
2faa3447 | 518 | |
14ed0a8b RM |
519 | int |
520 | fprint_target_auxv (struct ui_file *file, struct target_ops *ops) | |
521 | { | |
2faa3447 | 522 | struct gdbarch *gdbarch = target_gdbarch (); |
14ed0a8b | 523 | CORE_ADDR type, val; |
14ed0a8b | 524 | int ents = 0; |
9018be22 | 525 | auxv_info *info = get_auxv_inferior_data (ops); |
14ed0a8b | 526 | |
9018be22 SM |
527 | if (!info->data) |
528 | return -1; | |
14ed0a8b | 529 | |
9018be22 SM |
530 | gdb_byte *data = info->data->data (); |
531 | gdb_byte *ptr = data; | |
532 | size_t len = info->data->size (); | |
865ecab4 | 533 | |
f6ac5f3d | 534 | while (target_auxv_parse (&ptr, data + len, &type, &val) > 0) |
14ed0a8b | 535 | { |
2faa3447 | 536 | gdbarch_print_auxv_entry (gdbarch, file, type, val); |
14ed0a8b | 537 | ++ents; |
7c6467a4 PP |
538 | if (type == AT_NULL) |
539 | break; | |
14ed0a8b RM |
540 | } |
541 | ||
14ed0a8b RM |
542 | return ents; |
543 | } | |
544 | ||
545 | static void | |
1d12d88f | 546 | info_auxv_command (const char *cmd, int from_tty) |
14ed0a8b | 547 | { |
14ed0a8b | 548 | if (! target_has_stack) |
edefbb7c | 549 | error (_("The program has no auxiliary information now.")); |
14ed0a8b RM |
550 | else |
551 | { | |
f6ac5f3d | 552 | int ents = fprint_target_auxv (gdb_stdout, target_stack); |
5b4ee69b | 553 | |
14ed0a8b | 554 | if (ents < 0) |
edefbb7c | 555 | error (_("No auxiliary vector found, or failed reading it.")); |
14ed0a8b | 556 | else if (ents == 0) |
edefbb7c | 557 | error (_("Auxiliary vector is empty.")); |
14ed0a8b RM |
558 | } |
559 | } | |
560 | ||
14ed0a8b RM |
561 | void |
562 | _initialize_auxv (void) | |
563 | { | |
564 | add_info ("auxv", info_auxv_command, | |
edefbb7c AC |
565 | _("Display the inferior's auxiliary vector.\n\ |
566 | This is information provided by the operating system at program startup.")); | |
865ecab4 LM |
567 | |
568 | /* Set an auxv cache per-inferior. */ | |
569 | auxv_inferior_data | |
8e260fc0 | 570 | = register_inferior_data_with_cleanup (NULL, auxv_inferior_data_cleanup); |
865ecab4 LM |
571 | |
572 | /* Observers used to invalidate the auxv cache when needed. */ | |
76727919 TT |
573 | gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf); |
574 | gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf); | |
575 | gdb::observers::executable_changed.attach (invalidate_auxv_cache); | |
14ed0a8b | 576 | } |