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Commit | Line | Data |
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9402cc59 | 1 | /* CTF archive files. |
fd67aa11 | 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
9402cc59 NA |
3 | |
4 | This file is part of libctf. | |
5 | ||
6 | libctf is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
14 | See the GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; see the file COPYING. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <ctf-impl.h> | |
21 | #include <sys/types.h> | |
22 | #include <sys/stat.h> | |
23 | #include <elf.h> | |
a0486bac | 24 | #include "ctf-endian.h" |
9402cc59 NA |
25 | #include <errno.h> |
26 | #include <fcntl.h> | |
27 | #include <stdio.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
31 | #ifdef HAVE_MMAP | |
32 | #include <sys/mman.h> | |
33 | #endif | |
34 | ||
139633c3 | 35 | static off_t arc_write_one_ctf (ctf_dict_t * f, int fd, size_t threshold); |
ae41200b NA |
36 | static ctf_dict_t *ctf_dict_open_by_offset (const struct ctf_archive *arc, |
37 | const ctf_sect_t *symsect, | |
38 | const ctf_sect_t *strsect, | |
53651de8 NA |
39 | size_t offset, int little_endian, |
40 | int *errp); | |
9402cc59 NA |
41 | static int sort_modent_by_name (const void *one, const void *two, void *n); |
42 | static void *arc_mmap_header (int fd, size_t headersz); | |
43 | static void *arc_mmap_file (int fd, size_t size); | |
44 | static int arc_mmap_writeout (int fd, void *header, size_t headersz, | |
45 | const char **errmsg); | |
46 | static int arc_mmap_unmap (void *header, size_t headersz, const char **errmsg); | |
2c78e925 NA |
47 | static void ctf_arc_import_parent (const ctf_archive_t *arc, ctf_dict_t *fp); |
48 | ||
f4f60336 NA |
49 | /* Flag to indicate "symbol not present" in ctf_archive_internal.ctfi_symdicts |
50 | and ctfi_symnamedicts. Never initialized. */ | |
2c78e925 | 51 | static ctf_dict_t enosym; |
9402cc59 | 52 | |
5537f9b9 | 53 | /* Write out a CTF archive to the start of the file referenced by the passed-in |
139633c3 NA |
54 | fd. The entries in CTF_DICTS are referenced by name: the names are passed in |
55 | the names array, which must have CTF_DICTS entries. | |
9402cc59 NA |
56 | |
57 | Returns 0 on success, or an errno, or an ECTF_* value. */ | |
58 | int | |
139633c3 | 59 | ctf_arc_write_fd (int fd, ctf_dict_t **ctf_dicts, size_t ctf_dict_cnt, |
5537f9b9 | 60 | const char **names, size_t threshold) |
9402cc59 NA |
61 | { |
62 | const char *errmsg; | |
63 | struct ctf_archive *archdr; | |
9402cc59 NA |
64 | size_t i; |
65 | char dummy = 0; | |
66 | size_t headersz; | |
67 | ssize_t namesz; | |
68 | size_t ctf_startoffs; /* Start of the section we are working over. */ | |
69 | char *nametbl = NULL; /* The name table. */ | |
70 | char *np; | |
71 | off_t nameoffs; | |
72 | struct ctf_archive_modent *modent; | |
73 | ||
5537f9b9 | 74 | ctf_dprintf ("Writing CTF archive with %lu files\n", |
139633c3 | 75 | (unsigned long) ctf_dict_cnt); |
9402cc59 | 76 | |
9402cc59 NA |
77 | /* Figure out the size of the mmap()ed header, including the |
78 | ctf_archive_modent array. We assume that all of this needs no | |
79 | padding: a likely assumption, given that it's all made up of | |
80 | uint64_t's. */ | |
81 | headersz = sizeof (struct ctf_archive) | |
139633c3 | 82 | + (ctf_dict_cnt * sizeof (uint64_t) * 2); |
62d8e3b7 | 83 | ctf_dprintf ("headersz is %lu\n", (unsigned long) headersz); |
9402cc59 NA |
84 | |
85 | /* From now on we work in two pieces: an mmap()ed region from zero up to the | |
86 | headersz, and a region updated via write() starting after that, containing | |
87 | all the tables. Platforms that do not support mmap() just use write(). */ | |
88 | ctf_startoffs = headersz; | |
89 | if (lseek (fd, ctf_startoffs - 1, SEEK_SET) < 0) | |
90 | { | |
926c9e76 | 91 | errmsg = N_("ctf_arc_write(): cannot extend file while writing"); |
5537f9b9 | 92 | goto err; |
9402cc59 NA |
93 | } |
94 | ||
95 | if (write (fd, &dummy, 1) < 0) | |
96 | { | |
926c9e76 | 97 | errmsg = N_("ctf_arc_write(): cannot extend file while writing"); |
5537f9b9 | 98 | goto err; |
9402cc59 NA |
99 | } |
100 | ||
101 | if ((archdr = arc_mmap_header (fd, headersz)) == NULL) | |
102 | { | |
926c9e76 | 103 | errmsg = N_("ctf_arc_write(): cannot mmap"); |
5537f9b9 | 104 | goto err; |
9402cc59 NA |
105 | } |
106 | ||
107 | /* Fill in everything we can, which is everything other than the name | |
108 | table offset. */ | |
109 | archdr->ctfa_magic = htole64 (CTFA_MAGIC); | |
139633c3 | 110 | archdr->ctfa_ndicts = htole64 (ctf_dict_cnt); |
9402cc59 NA |
111 | archdr->ctfa_ctfs = htole64 (ctf_startoffs); |
112 | ||
113 | /* We could validate that all CTF files have the same data model, but | |
114 | since any reasonable construction process will be building things of | |
115 | only one bitness anyway, this is pretty pointless, so just use the | |
116 | model of the first CTF file for all of them. (It *is* valid to | |
117 | create an empty archive: the value of ctfa_model is irrelevant in | |
118 | this case, but we must be sure not to dereference uninitialized | |
119 | memory.) */ | |
120 | ||
139633c3 NA |
121 | if (ctf_dict_cnt > 0) |
122 | archdr->ctfa_model = htole64 (ctf_getmodel (ctf_dicts[0])); | |
9402cc59 NA |
123 | |
124 | /* Now write out the CTFs: ctf_archive_modent array via the mapping, | |
125 | ctfs via write(). The names themselves have not been written yet: we | |
126 | track them in a local strtab until the time is right, and sort the | |
127 | modents array after construction. | |
128 | ||
129 | The name table is not sorted. */ | |
130 | ||
139633c3 | 131 | for (i = 0, namesz = 0; i < le64toh (archdr->ctfa_ndicts); i++) |
9402cc59 NA |
132 | namesz += strlen (names[i]) + 1; |
133 | ||
134 | nametbl = malloc (namesz); | |
135 | if (nametbl == NULL) | |
136 | { | |
926c9e76 | 137 | errmsg = N_("ctf_arc_write(): error writing named CTF to archive"); |
9402cc59 NA |
138 | goto err_unmap; |
139 | } | |
140 | ||
141 | for (i = 0, namesz = 0, | |
142 | modent = (ctf_archive_modent_t *) ((char *) archdr | |
143 | + sizeof (struct ctf_archive)); | |
139633c3 | 144 | i < le64toh (archdr->ctfa_ndicts); i++) |
9402cc59 NA |
145 | { |
146 | off_t off; | |
147 | ||
148 | strcpy (&nametbl[namesz], names[i]); | |
149 | ||
139633c3 | 150 | off = arc_write_one_ctf (ctf_dicts[i], fd, threshold); |
9402cc59 NA |
151 | if ((off < 0) && (off > -ECTF_BASE)) |
152 | { | |
926c9e76 NA |
153 | errmsg = N_("ctf_arc_write(): cannot determine file " |
154 | "position while writing to archive"); | |
9402cc59 NA |
155 | goto err_free; |
156 | } | |
157 | if (off < 0) | |
158 | { | |
926c9e76 | 159 | errmsg = N_("ctf_arc_write(): cannot write CTF file to archive"); |
9402cc59 NA |
160 | errno = off * -1; |
161 | goto err_free; | |
162 | } | |
163 | ||
164 | modent->name_offset = htole64 (namesz); | |
165 | modent->ctf_offset = htole64 (off - ctf_startoffs); | |
166 | namesz += strlen (names[i]) + 1; | |
167 | modent++; | |
168 | } | |
169 | ||
6b22174f NA |
170 | ctf_qsort_r ((ctf_archive_modent_t *) ((char *) archdr |
171 | + sizeof (struct ctf_archive)), | |
139633c3 | 172 | le64toh (archdr->ctfa_ndicts), |
6b22174f NA |
173 | sizeof (struct ctf_archive_modent), sort_modent_by_name, |
174 | nametbl); | |
9402cc59 NA |
175 | |
176 | /* Now the name table. */ | |
177 | ||
178 | if ((nameoffs = lseek (fd, 0, SEEK_CUR)) < 0) | |
179 | { | |
926c9e76 NA |
180 | errmsg = N_("ctf_arc_write(): cannot get current file position " |
181 | "in archive"); | |
9402cc59 NA |
182 | goto err_free; |
183 | } | |
184 | archdr->ctfa_names = htole64 (nameoffs); | |
185 | np = nametbl; | |
186 | while (namesz > 0) | |
187 | { | |
188 | ssize_t len; | |
189 | if ((len = write (fd, np, namesz)) < 0) | |
190 | { | |
926c9e76 | 191 | errmsg = N_("ctf_arc_write(): cannot write name table to archive"); |
9402cc59 NA |
192 | goto err_free; |
193 | } | |
194 | namesz -= len; | |
195 | np += len; | |
196 | } | |
197 | free (nametbl); | |
198 | ||
199 | if (arc_mmap_writeout (fd, archdr, headersz, &errmsg) < 0) | |
200 | goto err_unmap; | |
201 | if (arc_mmap_unmap (archdr, headersz, &errmsg) < 0) | |
5537f9b9 | 202 | goto err; |
9402cc59 NA |
203 | return 0; |
204 | ||
205 | err_free: | |
206 | free (nametbl); | |
207 | err_unmap: | |
208 | arc_mmap_unmap (archdr, headersz, NULL); | |
9402cc59 | 209 | err: |
926c9e76 NA |
210 | /* We report errors into the first file in the archive, if any: if this is a |
211 | zero-file archive, put it in the open-errors stream for lack of anywhere | |
212 | else for it to go. */ | |
139633c3 | 213 | ctf_err_warn (ctf_dict_cnt > 0 ? ctf_dicts[0] : NULL, 0, errno, "%s", |
926c9e76 | 214 | gettext (errmsg)); |
9402cc59 NA |
215 | return errno; |
216 | } | |
217 | ||
139633c3 NA |
218 | /* Write out a CTF archive. The entries in CTF_DICTS are referenced by name: |
219 | the names are passed in the names array, which must have CTF_DICTS entries. | |
5537f9b9 NA |
220 | |
221 | If the filename is NULL, create a temporary file and return a pointer to it. | |
222 | ||
223 | Returns 0 on success, or an errno, or an ECTF_* value. */ | |
224 | int | |
139633c3 | 225 | ctf_arc_write (const char *file, ctf_dict_t **ctf_dicts, size_t ctf_dict_cnt, |
5537f9b9 NA |
226 | const char **names, size_t threshold) |
227 | { | |
228 | int err; | |
229 | int fd; | |
230 | ||
231 | if ((fd = open (file, O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0666)) < 0) | |
232 | { | |
139633c3 | 233 | ctf_err_warn (ctf_dict_cnt > 0 ? ctf_dicts[0] : NULL, 0, errno, |
926c9e76 | 234 | _("ctf_arc_write(): cannot create %s"), file); |
5537f9b9 NA |
235 | return errno; |
236 | } | |
237 | ||
139633c3 | 238 | err = ctf_arc_write_fd (fd, ctf_dicts, ctf_dict_cnt, names, threshold); |
5537f9b9 | 239 | if (err) |
df16e041 | 240 | goto err_close; |
5537f9b9 NA |
241 | |
242 | if ((err = close (fd)) < 0) | |
139633c3 | 243 | ctf_err_warn (ctf_dict_cnt > 0 ? ctf_dicts[0] : NULL, 0, errno, |
926c9e76 | 244 | _("ctf_arc_write(): cannot close after writing to archive")); |
df16e041 | 245 | goto err; |
5537f9b9 NA |
246 | |
247 | err_close: | |
df16e041 NC |
248 | (void) close (fd); |
249 | err: | |
5537f9b9 NA |
250 | if (err < 0) |
251 | unlink (file); | |
252 | ||
253 | return err; | |
254 | } | |
255 | ||
483546ce | 256 | /* Write one CTF dict out. Return the file position of the written file (or |
9402cc59 NA |
257 | rather, of the file-size uint64_t that precedes it): negative return is a |
258 | negative errno or ctf_errno value. On error, the file position may no longer | |
259 | be at the end of the file. */ | |
260 | static off_t | |
483546ce | 261 | arc_write_one_ctf (ctf_dict_t *f, int fd, size_t threshold) |
9402cc59 NA |
262 | { |
263 | off_t off, end_off; | |
264 | uint64_t ctfsz = 0; | |
265 | char *ctfszp; | |
266 | size_t ctfsz_len; | |
139633c3 | 267 | int (*writefn) (ctf_dict_t * fp, int fd); |
9402cc59 NA |
268 | |
269 | if ((off = lseek (fd, 0, SEEK_CUR)) < 0) | |
270 | return errno * -1; | |
271 | ||
272 | if (f->ctf_size > threshold) | |
273 | writefn = ctf_compress_write; | |
274 | else | |
275 | writefn = ctf_write; | |
276 | ||
277 | /* This zero-write turns into the size in a moment. */ | |
278 | ctfsz_len = sizeof (ctfsz); | |
279 | ctfszp = (char *) &ctfsz; | |
280 | while (ctfsz_len > 0) | |
281 | { | |
282 | ssize_t writelen = write (fd, ctfszp, ctfsz_len); | |
283 | if (writelen < 0) | |
284 | return errno * -1; | |
285 | ctfsz_len -= writelen; | |
286 | ctfszp += writelen; | |
287 | } | |
288 | ||
289 | if (writefn (f, fd) != 0) | |
290 | return f->ctf_errno * -1; | |
291 | ||
292 | if ((end_off = lseek (fd, 0, SEEK_CUR)) < 0) | |
293 | return errno * -1; | |
294 | ctfsz = htole64 (end_off - off); | |
295 | ||
296 | if ((lseek (fd, off, SEEK_SET)) < 0) | |
297 | return errno * -1; | |
298 | ||
299 | /* ... here. */ | |
300 | ctfsz_len = sizeof (ctfsz); | |
301 | ctfszp = (char *) &ctfsz; | |
302 | while (ctfsz_len > 0) | |
303 | { | |
304 | ssize_t writelen = write (fd, ctfszp, ctfsz_len); | |
305 | if (writelen < 0) | |
306 | return errno * -1; | |
307 | ctfsz_len -= writelen; | |
308 | ctfszp += writelen; | |
309 | } | |
310 | ||
311 | end_off = LCTF_ALIGN_OFFS (end_off, 8); | |
312 | if ((lseek (fd, end_off, SEEK_SET)) < 0) | |
313 | return errno * -1; | |
314 | ||
315 | return off; | |
316 | } | |
317 | ||
318 | /* qsort() function to sort the array of struct ctf_archive_modents into | |
319 | ascending name order. */ | |
320 | static int | |
321 | sort_modent_by_name (const void *one, const void *two, void *n) | |
322 | { | |
323 | const struct ctf_archive_modent *a = one; | |
324 | const struct ctf_archive_modent *b = two; | |
325 | char *nametbl = n; | |
326 | ||
327 | return strcmp (&nametbl[le64toh (a->name_offset)], | |
328 | &nametbl[le64toh (b->name_offset)]); | |
329 | } | |
330 | ||
2e428e74 | 331 | /* bsearch_r() function to search for a given name in the sorted array of struct |
9402cc59 NA |
332 | ctf_archive_modents. */ |
333 | static int | |
2e428e74 | 334 | search_modent_by_name (const void *key, const void *ent, void *arg) |
9402cc59 NA |
335 | { |
336 | const char *k = key; | |
337 | const struct ctf_archive_modent *v = ent; | |
2e428e74 | 338 | const char *search_nametbl = arg; |
9402cc59 NA |
339 | |
340 | return strcmp (k, &search_nametbl[le64toh (v->name_offset)]); | |
341 | } | |
342 | ||
2f6ecaed | 343 | /* Make a new struct ctf_archive_internal wrapper for a ctf_archive or a |
139633c3 | 344 | ctf_dict. Closes ARC and/or FP on error. Arrange to free the SYMSECT or |
601e455b | 345 | STRSECT, as needed, on close. Possibly do not unmap on close. */ |
2f6ecaed NA |
346 | |
347 | struct ctf_archive_internal * | |
601e455b NA |
348 | ctf_new_archive_internal (int is_archive, int unmap_on_close, |
349 | struct ctf_archive *arc, | |
139633c3 | 350 | ctf_dict_t *fp, const ctf_sect_t *symsect, |
2f6ecaed NA |
351 | const ctf_sect_t *strsect, |
352 | int *errp) | |
9402cc59 | 353 | { |
2f6ecaed | 354 | struct ctf_archive_internal *arci; |
9402cc59 | 355 | |
2f6ecaed | 356 | if ((arci = calloc (1, sizeof (struct ctf_archive_internal))) == NULL) |
9402cc59 | 357 | { |
2f6ecaed | 358 | if (is_archive) |
601e455b NA |
359 | { |
360 | if (unmap_on_close) | |
361 | ctf_arc_close_internal (arc); | |
362 | } | |
2f6ecaed | 363 | else |
139633c3 | 364 | ctf_dict_close (fp); |
2f6ecaed | 365 | return (ctf_set_open_errno (errp, errno)); |
9402cc59 | 366 | } |
2f6ecaed NA |
367 | arci->ctfi_is_archive = is_archive; |
368 | if (is_archive) | |
369 | arci->ctfi_archive = arc; | |
370 | else | |
139633c3 | 371 | arci->ctfi_dict = fp; |
2f6ecaed NA |
372 | if (symsect) |
373 | memcpy (&arci->ctfi_symsect, symsect, sizeof (struct ctf_sect)); | |
374 | if (strsect) | |
375 | memcpy (&arci->ctfi_strsect, strsect, sizeof (struct ctf_sect)); | |
376 | arci->ctfi_free_symsect = 0; | |
d50c0802 | 377 | arci->ctfi_free_strsect = 0; |
601e455b | 378 | arci->ctfi_unmap_on_close = unmap_on_close; |
53651de8 | 379 | arci->ctfi_symsect_little_endian = -1; |
2f6ecaed NA |
380 | |
381 | return arci; | |
382 | } | |
383 | ||
53651de8 NA |
384 | /* Set the symbol-table endianness of an archive (defaulting the symtab |
385 | endianness of all ctf_file_t's opened from that archive). */ | |
386 | void | |
387 | ctf_arc_symsect_endianness (ctf_archive_t *arc, int little_endian) | |
388 | { | |
389 | arc->ctfi_symsect_little_endian = !!little_endian; | |
390 | if (!arc->ctfi_is_archive) | |
391 | ctf_symsect_endianness (arc->ctfi_dict, arc->ctfi_symsect_little_endian); | |
392 | } | |
393 | ||
3d16b64e NA |
394 | /* Get the CTF preamble from data in a buffer, which may be either an archive or |
395 | a CTF dict. If multiple dicts are present in an archive, the preamble comes | |
396 | from an arbitrary dict. The preamble is a pointer into the ctfsect passed | |
397 | in. */ | |
398 | ||
399 | const ctf_preamble_t * | |
400 | ctf_arc_bufpreamble (const ctf_sect_t *ctfsect) | |
401 | { | |
027333da AM |
402 | if (ctfsect->cts_data != NULL |
403 | && ctfsect->cts_size > sizeof (uint64_t) | |
404 | && (le64toh ((*(uint64_t *) ctfsect->cts_data)) == CTFA_MAGIC)) | |
3d16b64e NA |
405 | { |
406 | struct ctf_archive *arc = (struct ctf_archive *) ctfsect->cts_data; | |
407 | return (const ctf_preamble_t *) ((char *) arc + le64toh (arc->ctfa_ctfs) | |
408 | + sizeof (uint64_t)); | |
409 | } | |
410 | else | |
411 | return (const ctf_preamble_t *) ctfsect->cts_data; | |
412 | } | |
413 | ||
2f6ecaed NA |
414 | /* Open a CTF archive or dictionary from data in a buffer (which the caller must |
415 | preserve until ctf_arc_close() time). Returns the archive, or NULL and an | |
416 | error in *err (if not NULL). */ | |
417 | ctf_archive_t * | |
418 | ctf_arc_bufopen (const ctf_sect_t *ctfsect, const ctf_sect_t *symsect, | |
419 | const ctf_sect_t *strsect, int *errp) | |
420 | { | |
421 | struct ctf_archive *arc = NULL; | |
422 | int is_archive; | |
139633c3 | 423 | ctf_dict_t *fp = NULL; |
2f6ecaed | 424 | |
027333da AM |
425 | if (ctfsect->cts_data != NULL |
426 | && ctfsect->cts_size > sizeof (uint64_t) | |
427 | && (le64toh ((*(uint64_t *) ctfsect->cts_data)) == CTFA_MAGIC)) | |
2f6ecaed | 428 | { |
601e455b NA |
429 | /* The archive is mmappable, so this operation is trivial. |
430 | ||
431 | This buffer is nonmodifiable, so the trick involving mmapping only part | |
432 | of it and storing the length in the magic number is not applicable: so | |
433 | record this fact in the archive-wrapper header. (We cannot record it | |
434 | in the archive, because the archive may very well be a read-only | |
435 | mapping.) */ | |
2f6ecaed NA |
436 | |
437 | is_archive = 1; | |
438 | arc = (struct ctf_archive *) ctfsect->cts_data; | |
439 | } | |
440 | else | |
441 | { | |
442 | is_archive = 0; | |
443 | if ((fp = ctf_bufopen (ctfsect, symsect, strsect, errp)) == NULL) | |
444 | { | |
926c9e76 | 445 | ctf_err_warn (NULL, 0, *errp, _("ctf_arc_bufopen(): cannot open CTF")); |
2f6ecaed NA |
446 | return NULL; |
447 | } | |
448 | } | |
601e455b | 449 | return ctf_new_archive_internal (is_archive, 0, arc, fp, symsect, strsect, |
2f6ecaed | 450 | errp); |
9402cc59 NA |
451 | } |
452 | ||
453 | /* Open a CTF archive. Returns the archive, or NULL and an error in *err (if | |
454 | not NULL). */ | |
455 | struct ctf_archive * | |
456 | ctf_arc_open_internal (const char *filename, int *errp) | |
457 | { | |
458 | const char *errmsg; | |
459 | int fd; | |
460 | struct stat s; | |
461 | struct ctf_archive *arc; /* (Actually the whole file.) */ | |
462 | ||
463 | libctf_init_debug(); | |
464 | if ((fd = open (filename, O_RDONLY)) < 0) | |
465 | { | |
926c9e76 | 466 | errmsg = N_("ctf_arc_open(): cannot open %s"); |
9402cc59 NA |
467 | goto err; |
468 | } | |
469 | if (fstat (fd, &s) < 0) | |
470 | { | |
926c9e76 | 471 | errmsg = N_("ctf_arc_open(): cannot stat %s"); |
9402cc59 NA |
472 | goto err_close; |
473 | } | |
474 | ||
475 | if ((arc = arc_mmap_file (fd, s.st_size)) == NULL) | |
476 | { | |
926c9e76 | 477 | errmsg = N_("ctf_arc_open(): cannot read in %s"); |
9402cc59 NA |
478 | goto err_close; |
479 | } | |
480 | ||
481 | if (le64toh (arc->ctfa_magic) != CTFA_MAGIC) | |
482 | { | |
926c9e76 | 483 | errmsg = N_("ctf_arc_open(): %s: invalid magic number"); |
9402cc59 NA |
484 | errno = ECTF_FMT; |
485 | goto err_unmap; | |
486 | } | |
487 | ||
488 | /* This horrible hack lets us know how much to unmap when the file is | |
489 | closed. (We no longer need the magic number, and the mapping | |
490 | is private.) */ | |
491 | arc->ctfa_magic = s.st_size; | |
492 | close (fd); | |
493 | return arc; | |
494 | ||
495 | err_unmap: | |
496 | arc_mmap_unmap (arc, s.st_size, NULL); | |
497 | err_close: | |
498 | close (fd); | |
499 | err: | |
500 | if (errp) | |
501 | *errp = errno; | |
926c9e76 | 502 | ctf_err_warn (NULL, 0, errno, gettext (errmsg), filename); |
9402cc59 NA |
503 | return NULL; |
504 | } | |
505 | ||
506 | /* Close an archive. */ | |
507 | void | |
508 | ctf_arc_close_internal (struct ctf_archive *arc) | |
509 | { | |
510 | if (arc == NULL) | |
511 | return; | |
512 | ||
513 | /* See the comment in ctf_arc_open(). */ | |
514 | arc_mmap_unmap (arc, arc->ctfa_magic, NULL); | |
515 | } | |
516 | ||
517 | /* Public entry point: close an archive, or CTF file. */ | |
518 | void | |
519 | ctf_arc_close (ctf_archive_t *arc) | |
520 | { | |
521 | if (arc == NULL) | |
522 | return; | |
523 | ||
524 | if (arc->ctfi_is_archive) | |
601e455b NA |
525 | { |
526 | if (arc->ctfi_unmap_on_close) | |
527 | ctf_arc_close_internal (arc->ctfi_archive); | |
528 | } | |
9402cc59 | 529 | else |
139633c3 | 530 | ctf_dict_close (arc->ctfi_dict); |
2c78e925 | 531 | free (arc->ctfi_symdicts); |
f4f60336 | 532 | free (arc->ctfi_symnamedicts); |
2c78e925 | 533 | ctf_dynhash_destroy (arc->ctfi_dicts); |
2f6ecaed NA |
534 | if (arc->ctfi_free_symsect) |
535 | free ((void *) arc->ctfi_symsect.cts_data); | |
d50c0802 NA |
536 | if (arc->ctfi_free_strsect) |
537 | free ((void *) arc->ctfi_strsect.cts_data); | |
9402cc59 | 538 | free (arc->ctfi_data); |
f046147d NA |
539 | if (arc->ctfi_bfd_close) |
540 | arc->ctfi_bfd_close (arc); | |
9402cc59 NA |
541 | free (arc); |
542 | } | |
543 | ||
139633c3 | 544 | /* Return the ctf_dict_t with the given name, or NULL if none, setting 'err' if |
9402cc59 | 545 | non-NULL. A name of NULL means to open the default file. */ |
139633c3 | 546 | static ctf_dict_t * |
ae41200b NA |
547 | ctf_dict_open_internal (const struct ctf_archive *arc, |
548 | const ctf_sect_t *symsect, | |
549 | const ctf_sect_t *strsect, | |
53651de8 NA |
550 | const char *name, int little_endian, |
551 | int *errp) | |
9402cc59 NA |
552 | { |
553 | struct ctf_archive_modent *modent; | |
2e428e74 | 554 | const char *search_nametbl; |
9402cc59 NA |
555 | |
556 | if (name == NULL) | |
557 | name = _CTF_SECTION; /* The default name. */ | |
558 | ||
ae41200b | 559 | ctf_dprintf ("ctf_dict_open_internal(%s): opening\n", name); |
9402cc59 NA |
560 | |
561 | modent = (ctf_archive_modent_t *) ((char *) arc | |
562 | + sizeof (struct ctf_archive)); | |
563 | ||
2e428e74 | 564 | search_nametbl = (const char *) arc + le64toh (arc->ctfa_names); |
139633c3 | 565 | modent = bsearch_r (name, modent, le64toh (arc->ctfa_ndicts), |
2e428e74 NA |
566 | sizeof (struct ctf_archive_modent), |
567 | search_modent_by_name, (void *) search_nametbl); | |
9402cc59 NA |
568 | |
569 | /* This is actually a common case and normal operation: no error | |
570 | debug output. */ | |
571 | if (modent == NULL) | |
572 | { | |
573 | if (errp) | |
574 | *errp = ECTF_ARNNAME; | |
575 | return NULL; | |
576 | } | |
577 | ||
ae41200b | 578 | return ctf_dict_open_by_offset (arc, symsect, strsect, |
53651de8 NA |
579 | le64toh (modent->ctf_offset), |
580 | little_endian, errp); | |
9402cc59 NA |
581 | } |
582 | ||
139633c3 | 583 | /* Return the ctf_dict_t with the given name, or NULL if none, setting 'err' if |
9402cc59 NA |
584 | non-NULL. A name of NULL means to open the default file. |
585 | ||
586 | Use the specified string and symbol table sections. | |
587 | ||
588 | Public entry point. */ | |
139633c3 | 589 | ctf_dict_t * |
ae41200b NA |
590 | ctf_dict_open_sections (const ctf_archive_t *arc, |
591 | const ctf_sect_t *symsect, | |
592 | const ctf_sect_t *strsect, | |
593 | const char *name, | |
594 | int *errp) | |
9402cc59 NA |
595 | { |
596 | if (arc->ctfi_is_archive) | |
597 | { | |
139633c3 | 598 | ctf_dict_t *ret; |
ae41200b | 599 | ret = ctf_dict_open_internal (arc->ctfi_archive, symsect, strsect, |
53651de8 NA |
600 | name, arc->ctfi_symsect_little_endian, |
601 | errp); | |
9402cc59 | 602 | if (ret) |
2c78e925 NA |
603 | { |
604 | ret->ctf_archive = (ctf_archive_t *) arc; | |
605 | ctf_arc_import_parent (arc, ret); | |
606 | } | |
9402cc59 NA |
607 | return ret; |
608 | } | |
609 | ||
610 | if ((name != NULL) && (strcmp (name, _CTF_SECTION) != 0)) | |
611 | { | |
612 | if (errp) | |
613 | *errp = ECTF_ARNNAME; | |
614 | return NULL; | |
615 | } | |
139633c3 | 616 | arc->ctfi_dict->ctf_archive = (ctf_archive_t *) arc; |
9402cc59 | 617 | |
139633c3 NA |
618 | /* Bump the refcount so that the user can ctf_dict_close() it. */ |
619 | arc->ctfi_dict->ctf_refcnt++; | |
620 | return arc->ctfi_dict; | |
9402cc59 NA |
621 | } |
622 | ||
139633c3 | 623 | /* Return the ctf_dict_t with the given name, or NULL if none, setting 'err' if |
9402cc59 NA |
624 | non-NULL. A name of NULL means to open the default file. |
625 | ||
626 | Public entry point. */ | |
139633c3 | 627 | ctf_dict_t * |
ae41200b | 628 | ctf_dict_open (const ctf_archive_t *arc, const char *name, int *errp) |
9402cc59 NA |
629 | { |
630 | const ctf_sect_t *symsect = &arc->ctfi_symsect; | |
631 | const ctf_sect_t *strsect = &arc->ctfi_strsect; | |
632 | ||
633 | if (symsect->cts_name == NULL) | |
634 | symsect = NULL; | |
635 | if (strsect->cts_name == NULL) | |
636 | strsect = NULL; | |
637 | ||
ae41200b | 638 | return ctf_dict_open_sections (arc, symsect, strsect, name, errp); |
9402cc59 NA |
639 | } |
640 | ||
2c78e925 NA |
641 | static void |
642 | ctf_cached_dict_close (void *fp) | |
643 | { | |
644 | ctf_dict_close ((ctf_dict_t *) fp); | |
645 | } | |
646 | ||
f4f60336 NA |
647 | /* Return the ctf_dict_t with the given name and cache it in the archive's |
648 | ctfi_dicts. If this is the first cached dict, designate it the | |
649 | crossdict_cache. */ | |
2c78e925 NA |
650 | static ctf_dict_t * |
651 | ctf_dict_open_cached (ctf_archive_t *arc, const char *name, int *errp) | |
652 | { | |
653 | ctf_dict_t *fp; | |
654 | char *dupname; | |
655 | ||
656 | /* Just return from the cache if possible. */ | |
657 | if (arc->ctfi_dicts | |
658 | && ((fp = ctf_dynhash_lookup (arc->ctfi_dicts, name)) != NULL)) | |
659 | { | |
660 | fp->ctf_refcnt++; | |
661 | return fp; | |
662 | } | |
663 | ||
664 | /* Not yet cached: open it. */ | |
665 | fp = ctf_dict_open (arc, name, errp); | |
666 | dupname = strdup (name); | |
667 | ||
668 | if (!fp || !dupname) | |
669 | goto oom; | |
670 | ||
671 | if (arc->ctfi_dicts == NULL) | |
672 | if ((arc->ctfi_dicts | |
673 | = ctf_dynhash_create (ctf_hash_string, ctf_hash_eq_string, | |
674 | free, ctf_cached_dict_close)) == NULL) | |
675 | goto oom; | |
676 | ||
677 | if (ctf_dynhash_insert (arc->ctfi_dicts, dupname, fp) < 0) | |
678 | goto oom; | |
679 | fp->ctf_refcnt++; | |
680 | ||
f4f60336 NA |
681 | if (arc->ctfi_crossdict_cache == NULL) |
682 | arc->ctfi_crossdict_cache = fp; | |
683 | ||
2c78e925 NA |
684 | return fp; |
685 | ||
686 | oom: | |
687 | ctf_dict_close (fp); | |
688 | free (dupname); | |
689 | if (errp) | |
690 | *errp = ENOMEM; | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | /* Flush any caches the CTF archive may have open. */ | |
695 | void | |
696 | ctf_arc_flush_caches (ctf_archive_t *wrapper) | |
697 | { | |
698 | free (wrapper->ctfi_symdicts); | |
ca019227 | 699 | ctf_dynhash_destroy (wrapper->ctfi_symnamedicts); |
2c78e925 NA |
700 | ctf_dynhash_destroy (wrapper->ctfi_dicts); |
701 | wrapper->ctfi_symdicts = NULL; | |
f4f60336 | 702 | wrapper->ctfi_symnamedicts = NULL; |
2c78e925 | 703 | wrapper->ctfi_dicts = NULL; |
f4f60336 | 704 | wrapper->ctfi_crossdict_cache = NULL; |
2c78e925 NA |
705 | } |
706 | ||
139633c3 | 707 | /* Return the ctf_dict_t at the given ctfa_ctfs-relative offset, or NULL if |
9402cc59 | 708 | none, setting 'err' if non-NULL. */ |
139633c3 | 709 | static ctf_dict_t * |
ae41200b NA |
710 | ctf_dict_open_by_offset (const struct ctf_archive *arc, |
711 | const ctf_sect_t *symsect, | |
712 | const ctf_sect_t *strsect, size_t offset, | |
53651de8 | 713 | int little_endian, int *errp) |
9402cc59 NA |
714 | { |
715 | ctf_sect_t ctfsect; | |
139633c3 | 716 | ctf_dict_t *fp; |
9402cc59 | 717 | |
ae41200b | 718 | ctf_dprintf ("ctf_dict_open_by_offset(%lu): opening\n", (unsigned long) offset); |
9402cc59 | 719 | |
a0486bac | 720 | memset (&ctfsect, 0, sizeof (ctf_sect_t)); |
9402cc59 NA |
721 | |
722 | offset += le64toh (arc->ctfa_ctfs); | |
723 | ||
724 | ctfsect.cts_name = _CTF_SECTION; | |
9402cc59 NA |
725 | ctfsect.cts_size = le64toh (*((uint64_t *) ((char *) arc + offset))); |
726 | ctfsect.cts_entsize = 1; | |
9402cc59 NA |
727 | ctfsect.cts_data = (void *) ((char *) arc + offset + sizeof (uint64_t)); |
728 | fp = ctf_bufopen (&ctfsect, symsect, strsect, errp); | |
729 | if (fp) | |
53651de8 NA |
730 | { |
731 | ctf_setmodel (fp, le64toh (arc->ctfa_model)); | |
732 | if (little_endian >= 0) | |
733 | ctf_symsect_endianness (fp, little_endian); | |
734 | } | |
9402cc59 NA |
735 | return fp; |
736 | } | |
737 | ||
ae41200b NA |
738 | /* Backward compatibility. */ |
739 | ctf_dict_t * | |
740 | ctf_arc_open_by_name (const ctf_archive_t *arc, const char *name, | |
741 | int *errp) | |
742 | { | |
743 | return ctf_dict_open (arc, name, errp); | |
744 | } | |
745 | ||
746 | ctf_dict_t * | |
747 | ctf_arc_open_by_name_sections (const ctf_archive_t *arc, | |
748 | const ctf_sect_t *symsect, | |
749 | const ctf_sect_t *strsect, | |
750 | const char *name, | |
751 | int *errp) | |
752 | { | |
753 | return ctf_dict_open_sections (arc, symsect, strsect, name, errp); | |
754 | } | |
755 | ||
2c78e925 NA |
756 | /* Import the parent into a ctf archive, if this is a child, the parent is not |
757 | already set, and a suitable archive member exists. No error is raised if | |
758 | this is not possible: this is just a best-effort helper operation to give | |
759 | people useful dicts to start with. */ | |
760 | static void | |
761 | ctf_arc_import_parent (const ctf_archive_t *arc, ctf_dict_t *fp) | |
762 | { | |
763 | if ((fp->ctf_flags & LCTF_CHILD) && fp->ctf_parname && !fp->ctf_parent) | |
764 | { | |
765 | ctf_dict_t *parent = ctf_dict_open_cached ((ctf_archive_t *) arc, | |
766 | fp->ctf_parname, NULL); | |
767 | if (parent) | |
768 | { | |
769 | ctf_import (fp, parent); | |
770 | ctf_dict_close (parent); | |
771 | } | |
772 | } | |
773 | } | |
774 | ||
9c23dfa5 NA |
775 | /* Return the number of members in an archive. */ |
776 | size_t | |
777 | ctf_archive_count (const ctf_archive_t *wrapper) | |
778 | { | |
779 | if (!wrapper->ctfi_is_archive) | |
780 | return 1; | |
781 | ||
139633c3 | 782 | return wrapper->ctfi_archive->ctfa_ndicts; |
9c23dfa5 NA |
783 | } |
784 | ||
f4f60336 NA |
785 | /* Look up a symbol in an archive by name or index (if the name is set, a lookup |
786 | by name is done). Return the dict in the archive that the symbol is found | |
787 | in, and (optionally) the ctf_id_t of the symbol in that dict (so you don't | |
788 | have to look it up yourself). The dict is cached, so repeated lookups are | |
789 | nearly free. | |
2c78e925 NA |
790 | |
791 | As usual, you should ctf_dict_close() the returned dict once you are done | |
792 | with it. | |
793 | ||
794 | Returns NULL on error, and an error in errp (if set). */ | |
795 | ||
f4f60336 NA |
796 | static ctf_dict_t * |
797 | ctf_arc_lookup_sym_or_name (ctf_archive_t *wrapper, unsigned long symidx, | |
798 | const char *symname, ctf_id_t *typep, int *errp) | |
2c78e925 NA |
799 | { |
800 | ctf_dict_t *fp; | |
f4f60336 | 801 | void *fpkey; |
2c78e925 NA |
802 | ctf_id_t type; |
803 | ||
804 | /* The usual non-archive-transparent-wrapper special case. */ | |
805 | if (!wrapper->ctfi_is_archive) | |
806 | { | |
f4f60336 | 807 | if (!symname) |
2c78e925 | 808 | { |
f4f60336 NA |
809 | if ((type = ctf_lookup_by_symbol (wrapper->ctfi_dict, symidx)) == CTF_ERR) |
810 | { | |
811 | if (errp) | |
812 | *errp = ctf_errno (wrapper->ctfi_dict); | |
813 | return NULL; | |
814 | } | |
815 | } | |
816 | else | |
817 | { | |
818 | if ((type = ctf_lookup_by_symbol_name (wrapper->ctfi_dict, | |
819 | symname)) == CTF_ERR) | |
820 | { | |
821 | if (errp) | |
822 | *errp = ctf_errno (wrapper->ctfi_dict); | |
823 | return NULL; | |
824 | } | |
2c78e925 NA |
825 | } |
826 | if (typep) | |
827 | *typep = type; | |
828 | wrapper->ctfi_dict->ctf_refcnt++; | |
829 | return wrapper->ctfi_dict; | |
830 | } | |
831 | ||
832 | if (wrapper->ctfi_symsect.cts_name == NULL | |
833 | || wrapper->ctfi_symsect.cts_data == NULL | |
834 | || wrapper->ctfi_symsect.cts_size == 0 | |
835 | || wrapper->ctfi_symsect.cts_entsize == 0) | |
836 | { | |
837 | if (errp) | |
838 | *errp = ECTF_NOSYMTAB; | |
839 | return NULL; | |
840 | } | |
841 | ||
f4f60336 NA |
842 | /* Make enough space for all possible symbol indexes, if not already done. We |
843 | cache the originating dictionary of all symbols. The dict links are weak, | |
844 | to the dictionaries cached in ctfi_dicts: their refcnts are *not* bumped. | |
845 | We also cache similar mappings for symbol names: these are ordinary | |
846 | dynhashes, with weak links to dicts. */ | |
2c78e925 | 847 | |
f4f60336 | 848 | if (!wrapper->ctfi_symdicts) |
2c78e925 | 849 | { |
f4f60336 NA |
850 | if ((wrapper->ctfi_symdicts = calloc (wrapper->ctfi_symsect.cts_size |
851 | / wrapper->ctfi_symsect.cts_entsize, | |
852 | sizeof (ctf_dict_t *))) == NULL) | |
2c78e925 NA |
853 | { |
854 | if (errp) | |
855 | *errp = ENOMEM; | |
856 | return NULL; | |
857 | } | |
858 | } | |
f4f60336 | 859 | if (!wrapper->ctfi_symnamedicts) |
2c78e925 | 860 | { |
f4f60336 NA |
861 | if ((wrapper->ctfi_symnamedicts = ctf_dynhash_create (ctf_hash_string, |
862 | ctf_hash_eq_string, | |
863 | free, NULL)) == NULL) | |
2c78e925 NA |
864 | { |
865 | if (errp) | |
866 | *errp = ENOMEM; | |
867 | return NULL; | |
868 | } | |
869 | } | |
870 | ||
f4f60336 NA |
871 | /* Perhaps the dict in which we found a previous lookup is cached. If it's |
872 | supposed to be cached but we don't find it, pretend it was always not | |
873 | found: this should never happen, but shouldn't be allowed to cause trouble | |
874 | if it does. */ | |
875 | ||
876 | if ((symname && ctf_dynhash_lookup_kv (wrapper->ctfi_symnamedicts, | |
877 | symname, NULL, &fpkey)) | |
878 | || (!symname && wrapper->ctfi_symdicts[symidx] != NULL)) | |
2c78e925 | 879 | { |
f4f60336 NA |
880 | if (symname) |
881 | fp = (ctf_dict_t *) fpkey; | |
882 | else | |
883 | fp = wrapper->ctfi_symdicts[symidx]; | |
884 | ||
885 | if (fp == &enosym) | |
886 | goto no_sym; | |
887 | ||
888 | if (symname) | |
2c78e925 | 889 | { |
f4f60336 NA |
890 | if ((type = ctf_lookup_by_symbol_name (fp, symname)) == CTF_ERR) |
891 | goto cache_no_sym; | |
892 | } | |
893 | else | |
894 | { | |
895 | if ((type = ctf_lookup_by_symbol (fp, symidx)) == CTF_ERR) | |
896 | goto cache_no_sym; | |
2c78e925 NA |
897 | } |
898 | ||
899 | if (typep) | |
f4f60336 NA |
900 | *typep = type; |
901 | fp->ctf_refcnt++; | |
902 | return fp; | |
2c78e925 NA |
903 | } |
904 | ||
905 | /* Not cached: find it and cache it. We must track open errors ourselves even | |
906 | if our caller doesn't, to be able to distinguish no-error end-of-iteration | |
907 | from open errors. */ | |
908 | ||
909 | int local_err; | |
910 | int *local_errp; | |
911 | ctf_next_t *i = NULL; | |
912 | const char *name; | |
913 | ||
914 | if (errp) | |
915 | local_errp = errp; | |
916 | else | |
917 | local_errp = &local_err; | |
918 | ||
919 | while ((fp = ctf_archive_next (wrapper, &i, &name, 0, local_errp)) != NULL) | |
920 | { | |
f4f60336 | 921 | if (!symname) |
2c78e925 | 922 | { |
f4f60336 NA |
923 | if ((type = ctf_lookup_by_symbol (fp, symidx)) != CTF_ERR) |
924 | wrapper->ctfi_symdicts[symidx] = fp; | |
925 | } | |
926 | else | |
927 | { | |
928 | if ((type = ctf_lookup_by_symbol_name (fp, symname)) != CTF_ERR) | |
929 | { | |
930 | char *tmp; | |
931 | /* No error checking, as above. */ | |
932 | if ((tmp = strdup (symname)) != NULL) | |
933 | ctf_dynhash_insert (wrapper->ctfi_symnamedicts, tmp, fp); | |
934 | } | |
935 | } | |
2c78e925 | 936 | |
f4f60336 NA |
937 | if (type != CTF_ERR) |
938 | { | |
2c78e925 NA |
939 | if (typep) |
940 | *typep = type; | |
f4f60336 | 941 | ctf_next_destroy (i); |
2c78e925 NA |
942 | return fp; |
943 | } | |
f4f60336 NA |
944 | if (ctf_errno (fp) != ECTF_NOTYPEDAT) |
945 | { | |
946 | if (errp) | |
947 | *errp = ctf_errno (fp); | |
948 | ctf_next_destroy (i); | |
949 | return NULL; /* errno is set for us. */ | |
950 | } | |
2c78e925 NA |
951 | ctf_dict_close (fp); |
952 | } | |
953 | if (*local_errp != ECTF_NEXT_END) | |
954 | { | |
955 | ctf_next_destroy (i); | |
956 | return NULL; | |
957 | } | |
f4f60336 | 958 | |
2c78e925 NA |
959 | /* Don't leak end-of-iteration to the caller. */ |
960 | *local_errp = 0; | |
961 | ||
f4f60336 NA |
962 | cache_no_sym: |
963 | if (!symname) | |
964 | wrapper->ctfi_symdicts[symidx] = &enosym; | |
965 | else | |
966 | { | |
967 | char *tmp; | |
968 | ||
969 | /* No error checking: if caching fails, there is only a slight performance | |
970 | impact. */ | |
971 | if ((tmp = strdup (symname)) != NULL) | |
972 | if (ctf_dynhash_insert (wrapper->ctfi_symnamedicts, tmp, &enosym) < 0) | |
973 | free (tmp); | |
974 | } | |
2c78e925 | 975 | |
f4f60336 | 976 | no_sym: |
2c78e925 NA |
977 | if (errp) |
978 | *errp = ECTF_NOTYPEDAT; | |
979 | if (typep) | |
980 | *typep = CTF_ERR; | |
981 | return NULL; | |
982 | } | |
983 | ||
f4f60336 NA |
984 | /* The public API for looking up a symbol by index. */ |
985 | ctf_dict_t * | |
986 | ctf_arc_lookup_symbol (ctf_archive_t *wrapper, unsigned long symidx, | |
987 | ctf_id_t *typep, int *errp) | |
988 | { | |
989 | return ctf_arc_lookup_sym_or_name (wrapper, symidx, NULL, typep, errp); | |
990 | } | |
991 | ||
992 | /* The public API for looking up a symbol by name. */ | |
993 | ||
994 | ctf_dict_t * | |
995 | ctf_arc_lookup_symbol_name (ctf_archive_t *wrapper, const char *symname, | |
996 | ctf_id_t *typep, int *errp) | |
997 | { | |
998 | return ctf_arc_lookup_sym_or_name (wrapper, 0, symname, typep, errp); | |
999 | } | |
1000 | ||
9402cc59 NA |
1001 | /* Raw iteration over all CTF files in an archive. We pass the raw data for all |
1002 | CTF files in turn to the specified callback function. */ | |
1003 | static int | |
1004 | ctf_archive_raw_iter_internal (const struct ctf_archive *arc, | |
1005 | ctf_archive_raw_member_f *func, void *data) | |
1006 | { | |
1007 | int rc; | |
1008 | size_t i; | |
1009 | struct ctf_archive_modent *modent; | |
1010 | const char *nametbl; | |
1011 | ||
1012 | modent = (ctf_archive_modent_t *) ((char *) arc | |
1013 | + sizeof (struct ctf_archive)); | |
1014 | nametbl = (((const char *) arc) + le64toh (arc->ctfa_names)); | |
1015 | ||
139633c3 | 1016 | for (i = 0; i < le64toh (arc->ctfa_ndicts); i++) |
9402cc59 NA |
1017 | { |
1018 | const char *name; | |
1019 | char *fp; | |
1020 | ||
1021 | name = &nametbl[le64toh (modent[i].name_offset)]; | |
1022 | fp = ((char *) arc + le64toh (arc->ctfa_ctfs) | |
1023 | + le64toh (modent[i].ctf_offset)); | |
1024 | ||
1025 | if ((rc = func (name, (void *) (fp + sizeof (uint64_t)), | |
1026 | le64toh (*((uint64_t *) fp)), data)) != 0) | |
1027 | return rc; | |
1028 | } | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | /* Raw iteration over all CTF files in an archive: public entry point. | |
1033 | ||
1034 | Returns -EINVAL if not supported for this sort of archive. */ | |
1035 | int | |
1036 | ctf_archive_raw_iter (const ctf_archive_t *arc, | |
1037 | ctf_archive_raw_member_f * func, void *data) | |
1038 | { | |
1039 | if (arc->ctfi_is_archive) | |
1040 | return ctf_archive_raw_iter_internal (arc->ctfi_archive, func, data); | |
1041 | ||
1042 | return -EINVAL; /* Not supported. */ | |
1043 | } | |
1044 | ||
ac36e134 NA |
1045 | /* Iterate over all CTF files in an archive: public entry point. We pass all |
1046 | CTF files in turn to the specified callback function. */ | |
1047 | int | |
1048 | ctf_archive_iter (const ctf_archive_t *arc, ctf_archive_member_f *func, | |
1049 | void *data) | |
9402cc59 | 1050 | { |
ac36e134 NA |
1051 | ctf_next_t *i = NULL; |
1052 | ctf_dict_t *fp; | |
1053 | const char *name; | |
1054 | int err; | |
9402cc59 | 1055 | |
ac36e134 | 1056 | while ((fp = ctf_archive_next (arc, &i, &name, 0, &err)) != NULL) |
9402cc59 | 1057 | { |
ac36e134 | 1058 | int rc; |
9402cc59 | 1059 | |
ac36e134 | 1060 | if ((rc = func (fp, name, data)) != 0) |
9402cc59 | 1061 | { |
ac36e134 NA |
1062 | ctf_dict_close (fp); |
1063 | ctf_next_destroy (i); | |
9402cc59 NA |
1064 | return rc; |
1065 | } | |
ac36e134 | 1066 | ctf_dict_close (fp); |
9402cc59 NA |
1067 | } |
1068 | return 0; | |
1069 | } | |
1070 | ||
688d28f6 | 1071 | /* Iterate over all CTF files in an archive, returning each dict in turn as a |
139633c3 | 1072 | ctf_dict_t, and NULL on error or end of iteration. It is the caller's |
8769046e | 1073 | responsibility to close it. Parent dicts may be skipped. |
688d28f6 | 1074 | |
2c78e925 NA |
1075 | The archive member is cached for rapid return on future calls. |
1076 | ||
688d28f6 NA |
1077 | We identify parents by name rather than by flag value: for now, with the |
1078 | linker only emitting parents named _CTF_SECTION, this works well enough. */ | |
1079 | ||
139633c3 | 1080 | ctf_dict_t * |
688d28f6 NA |
1081 | ctf_archive_next (const ctf_archive_t *wrapper, ctf_next_t **it, const char **name, |
1082 | int skip_parent, int *errp) | |
1083 | { | |
139633c3 | 1084 | ctf_dict_t *f; |
688d28f6 NA |
1085 | ctf_next_t *i = *it; |
1086 | struct ctf_archive *arc; | |
1087 | struct ctf_archive_modent *modent; | |
1088 | const char *nametbl; | |
1089 | const char *name_; | |
1090 | ||
1091 | if (!i) | |
1092 | { | |
1093 | if ((i = ctf_next_create()) == NULL) | |
1094 | { | |
1095 | if (errp) | |
1096 | *errp = ENOMEM; | |
1097 | return NULL; | |
1098 | } | |
1099 | i->cu.ctn_arc = wrapper; | |
1100 | i->ctn_iter_fun = (void (*) (void)) ctf_archive_next; | |
1101 | *it = i; | |
1102 | } | |
1103 | ||
1104 | if ((void (*) (void)) ctf_archive_next != i->ctn_iter_fun) | |
1105 | { | |
1106 | if (errp) | |
1107 | *errp = ECTF_NEXT_WRONGFUN; | |
1108 | return NULL; | |
1109 | } | |
1110 | ||
1111 | if (wrapper != i->cu.ctn_arc) | |
1112 | { | |
1113 | if (errp) | |
1114 | *errp = ECTF_NEXT_WRONGFP; | |
1115 | return NULL; | |
1116 | } | |
1117 | ||
139633c3 | 1118 | /* Iteration is made a bit more complex by the need to handle ctf_dict_t's |
688d28f6 NA |
1119 | transparently wrapped in a single-member archive. These are parents: if |
1120 | skip_parent is on, they are skipped and the iterator terminates | |
1121 | immediately. */ | |
1122 | ||
1123 | if (!wrapper->ctfi_is_archive && i->ctn_n == 0) | |
1124 | { | |
1125 | i->ctn_n++; | |
1126 | if (!skip_parent) | |
1127 | { | |
139633c3 | 1128 | wrapper->ctfi_dict->ctf_refcnt++; |
eaa2913a NA |
1129 | if (name) |
1130 | *name = _CTF_SECTION; | |
139633c3 | 1131 | return wrapper->ctfi_dict; |
688d28f6 NA |
1132 | } |
1133 | } | |
1134 | ||
1135 | arc = wrapper->ctfi_archive; | |
1136 | ||
1137 | /* The loop keeps going when skip_parent is on as long as the member we find | |
1138 | is the parent (i.e. at most two iterations, but possibly an early return if | |
1139 | *all* we have is a parent). */ | |
1140 | ||
688d28f6 NA |
1141 | do |
1142 | { | |
139633c3 | 1143 | if ((!wrapper->ctfi_is_archive) || (i->ctn_n >= le64toh (arc->ctfa_ndicts))) |
688d28f6 NA |
1144 | { |
1145 | ctf_next_destroy (i); | |
1146 | *it = NULL; | |
1147 | if (errp) | |
1148 | *errp = ECTF_NEXT_END; | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
688d28f6 NA |
1152 | modent = (ctf_archive_modent_t *) ((char *) arc |
1153 | + sizeof (struct ctf_archive)); | |
1154 | nametbl = (((const char *) arc) + le64toh (arc->ctfa_names)); | |
1155 | ||
1156 | name_ = &nametbl[le64toh (modent[i->ctn_n].name_offset)]; | |
1157 | i->ctn_n++; | |
eefe721e NA |
1158 | } |
1159 | while (skip_parent && strcmp (name_, _CTF_SECTION) == 0); | |
688d28f6 NA |
1160 | |
1161 | if (name) | |
1162 | *name = name_; | |
1163 | ||
2c78e925 | 1164 | f = ctf_dict_open_cached ((ctf_archive_t *) wrapper, name_, errp); |
688d28f6 NA |
1165 | return f; |
1166 | } | |
1167 | ||
9402cc59 NA |
1168 | #ifdef HAVE_MMAP |
1169 | /* Map the header in. Only used on new, empty files. */ | |
1170 | static void *arc_mmap_header (int fd, size_t headersz) | |
1171 | { | |
1172 | void *hdr; | |
1173 | if ((hdr = mmap (NULL, headersz, PROT_READ | PROT_WRITE, MAP_SHARED, fd, | |
1174 | 0)) == MAP_FAILED) | |
1175 | return NULL; | |
1176 | return hdr; | |
1177 | } | |
1178 | ||
1179 | /* mmap() the whole file, for reading only. (Map it writably, but privately: we | |
1180 | need to modify the region, but don't need anyone else to see the | |
1181 | modifications.) */ | |
1182 | static void *arc_mmap_file (int fd, size_t size) | |
1183 | { | |
1184 | void *arc; | |
1185 | if ((arc = mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, | |
1186 | fd, 0)) == MAP_FAILED) | |
1187 | return NULL; | |
1188 | return arc; | |
1189 | } | |
1190 | ||
1191 | /* Persist the header to disk. */ | |
1192 | static int arc_mmap_writeout (int fd _libctf_unused_, void *header, | |
1193 | size_t headersz, const char **errmsg) | |
1194 | { | |
1195 | if (msync (header, headersz, MS_ASYNC) < 0) | |
1196 | { | |
1197 | if (errmsg) | |
926c9e76 NA |
1198 | *errmsg = N_("arc_mmap_writeout(): cannot sync after writing " |
1199 | "to %s: %s"); | |
9402cc59 NA |
1200 | return -1; |
1201 | } | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | /* Unmap the region. */ | |
1206 | static int arc_mmap_unmap (void *header, size_t headersz, const char **errmsg) | |
1207 | { | |
1208 | if (munmap (header, headersz) < 0) | |
1209 | { | |
1210 | if (errmsg) | |
926c9e76 NA |
1211 | *errmsg = N_("arc_mmap_munmap(): cannot unmap after writing " |
1212 | "to %s: %s"); | |
9402cc59 NA |
1213 | return -1; |
1214 | } | |
1215 | return 0; | |
1216 | } | |
1217 | #else | |
1218 | /* Map the header in. Only used on new, empty files. */ | |
f5e73be1 | 1219 | static void *arc_mmap_header (int fd _libctf_unused_, size_t headersz) |
9402cc59 NA |
1220 | { |
1221 | void *hdr; | |
1222 | if ((hdr = malloc (headersz)) == NULL) | |
1223 | return NULL; | |
1224 | return hdr; | |
1225 | } | |
1226 | ||
1227 | /* Pull in the whole file, for reading only. We assume the current file | |
1228 | position is at the start of the file. */ | |
1229 | static void *arc_mmap_file (int fd, size_t size) | |
1230 | { | |
1231 | char *data; | |
1232 | ||
1233 | if ((data = malloc (size)) == NULL) | |
1234 | return NULL; | |
1235 | ||
1236 | if (ctf_pread (fd, data, size, 0) < 0) | |
1237 | { | |
1238 | free (data); | |
1239 | return NULL; | |
1240 | } | |
1241 | return data; | |
1242 | } | |
1243 | ||
1244 | /* Persist the header to disk. */ | |
1245 | static int arc_mmap_writeout (int fd, void *header, size_t headersz, | |
1246 | const char **errmsg) | |
1247 | { | |
1248 | ssize_t len; | |
9402cc59 NA |
1249 | char *data = (char *) header; |
1250 | ssize_t count = headersz; | |
1251 | ||
1252 | if ((lseek (fd, 0, SEEK_SET)) < 0) | |
1253 | { | |
1254 | if (errmsg) | |
926c9e76 NA |
1255 | *errmsg = N_("arc_mmap_writeout(): cannot seek while writing header to " |
1256 | "%s: %s"); | |
9402cc59 NA |
1257 | return -1; |
1258 | } | |
1259 | ||
1260 | while (headersz > 0) | |
1261 | { | |
1262 | if ((len = write (fd, data, count)) < 0) | |
1263 | { | |
1264 | if (errmsg) | |
926c9e76 | 1265 | *errmsg = N_("arc_mmap_writeout(): cannot write header to %s: %s"); |
9402cc59 NA |
1266 | return len; |
1267 | } | |
1268 | if (len == EINTR) | |
1269 | continue; | |
1270 | ||
9402cc59 NA |
1271 | if (len == 0) /* EOF. */ |
1272 | break; | |
1273 | ||
1274 | count -= len; | |
1275 | data += len; | |
1276 | } | |
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | /* Unmap the region. */ | |
1281 | static int arc_mmap_unmap (void *header, size_t headersz _libctf_unused_, | |
1282 | const char **errmsg _libctf_unused_) | |
1283 | { | |
1284 | free (header); | |
1285 | return 0; | |
1286 | } | |
1287 | #endif |