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1 | /* Opening CTF files. |
2 | Copyright (C) 2019 Free Software Foundation, Inc. | |
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 <stddef.h> | |
22 | #include <string.h> | |
23 | #include <sys/types.h> | |
24 | #include <elf.h> | |
25 | #include <assert.h> | |
26 | #include "swap.h" | |
27 | #include <bfd.h> | |
28 | #include <zlib.h> | |
29 | ||
30 | #include "elf-bfd.h" | |
31 | ||
32 | static const ctf_dmodel_t _libctf_models[] = { | |
33 | {"ILP32", CTF_MODEL_ILP32, 4, 1, 2, 4, 4}, | |
34 | {"LP64", CTF_MODEL_LP64, 8, 1, 2, 4, 8}, | |
35 | {NULL, 0, 0, 0, 0, 0, 0} | |
36 | }; | |
37 | ||
38 | const char _CTF_SECTION[] = ".ctf"; | |
39 | const char _CTF_NULLSTR[] = ""; | |
40 | ||
41 | /* Version-sensitive accessors. */ | |
42 | ||
43 | static uint32_t | |
44 | get_kind_v1 (uint32_t info) | |
45 | { | |
46 | return (CTF_V1_INFO_KIND (info)); | |
47 | } | |
48 | ||
49 | static uint32_t | |
50 | get_root_v1 (uint32_t info) | |
51 | { | |
52 | return (CTF_V1_INFO_ISROOT (info)); | |
53 | } | |
54 | ||
55 | static uint32_t | |
56 | get_vlen_v1 (uint32_t info) | |
57 | { | |
58 | return (CTF_V1_INFO_VLEN (info)); | |
59 | } | |
60 | ||
61 | static uint32_t | |
62 | get_kind_v2 (uint32_t info) | |
63 | { | |
64 | return (CTF_V2_INFO_KIND (info)); | |
65 | } | |
66 | ||
67 | static uint32_t | |
68 | get_root_v2 (uint32_t info) | |
69 | { | |
70 | return (CTF_V2_INFO_ISROOT (info)); | |
71 | } | |
72 | ||
73 | static uint32_t | |
74 | get_vlen_v2 (uint32_t info) | |
75 | { | |
76 | return (CTF_V2_INFO_VLEN (info)); | |
77 | } | |
78 | ||
79 | static inline ssize_t | |
80 | get_ctt_size_common (const ctf_file_t *fp _libctf_unused_, | |
81 | const ctf_type_t *tp _libctf_unused_, | |
82 | ssize_t *sizep, ssize_t *incrementp, size_t lsize, | |
83 | size_t csize, size_t ctf_type_size, | |
84 | size_t ctf_stype_size, size_t ctf_lsize_sent) | |
85 | { | |
86 | ssize_t size, increment; | |
87 | ||
88 | if (csize == ctf_lsize_sent) | |
89 | { | |
90 | size = lsize; | |
91 | increment = ctf_type_size; | |
92 | } | |
93 | else | |
94 | { | |
95 | size = csize; | |
96 | increment = ctf_stype_size; | |
97 | } | |
98 | ||
99 | if (sizep) | |
100 | *sizep = size; | |
101 | if (incrementp) | |
102 | *incrementp = increment; | |
103 | ||
104 | return size; | |
105 | } | |
106 | ||
107 | static ssize_t | |
108 | get_ctt_size_v1 (const ctf_file_t *fp, const ctf_type_t *tp, | |
109 | ssize_t *sizep, ssize_t *incrementp) | |
110 | { | |
111 | ctf_type_v1_t *t1p = (ctf_type_v1_t *) tp; | |
112 | ||
113 | return (get_ctt_size_common (fp, tp, sizep, incrementp, | |
114 | CTF_TYPE_LSIZE (t1p), t1p->ctt_size, | |
115 | sizeof (ctf_type_v1_t), sizeof (ctf_stype_v1_t), | |
116 | CTF_LSIZE_SENT_V1)); | |
117 | } | |
118 | ||
119 | /* Return the size that a v1 will be once it is converted to v2. */ | |
120 | ||
121 | static ssize_t | |
122 | get_ctt_size_v2_unconverted (const ctf_file_t *fp, const ctf_type_t *tp, | |
123 | ssize_t *sizep, ssize_t *incrementp) | |
124 | { | |
125 | ctf_type_v1_t *t1p = (ctf_type_v1_t *) tp; | |
126 | ||
127 | return (get_ctt_size_common (fp, tp, sizep, incrementp, | |
128 | CTF_TYPE_LSIZE (t1p), t1p->ctt_size, | |
129 | sizeof (ctf_type_t), sizeof (ctf_stype_t), | |
130 | CTF_LSIZE_SENT)); | |
131 | } | |
132 | ||
133 | static ssize_t | |
134 | get_ctt_size_v2 (const ctf_file_t *fp, const ctf_type_t *tp, | |
135 | ssize_t *sizep, ssize_t *incrementp) | |
136 | { | |
137 | return (get_ctt_size_common (fp, tp, sizep, incrementp, | |
138 | CTF_TYPE_LSIZE (tp), tp->ctt_size, | |
139 | sizeof (ctf_type_t), sizeof (ctf_stype_t), | |
140 | CTF_LSIZE_SENT)); | |
141 | } | |
142 | ||
143 | static ssize_t | |
144 | get_vbytes_common (unsigned short kind, ssize_t size _libctf_unused_, | |
145 | size_t vlen) | |
146 | { | |
147 | switch (kind) | |
148 | { | |
149 | case CTF_K_INTEGER: | |
150 | case CTF_K_FLOAT: | |
151 | return (sizeof (uint32_t)); | |
152 | case CTF_K_SLICE: | |
153 | return (offsetof (ctf_slice_t, cts_bits) + | |
154 | sizeof (((ctf_slice_t *)0)->cts_bits)); | |
155 | case CTF_K_ENUM: | |
156 | return (sizeof (ctf_enum_t) * vlen); | |
157 | case CTF_K_FORWARD: | |
158 | case CTF_K_UNKNOWN: | |
159 | case CTF_K_POINTER: | |
160 | case CTF_K_TYPEDEF: | |
161 | case CTF_K_VOLATILE: | |
162 | case CTF_K_CONST: | |
163 | case CTF_K_RESTRICT: | |
164 | return 0; | |
165 | default: | |
166 | ctf_dprintf ("detected invalid CTF kind -- %x\n", kind); | |
167 | return ECTF_CORRUPT; | |
168 | } | |
169 | } | |
170 | ||
171 | static ssize_t | |
172 | get_vbytes_v1 (unsigned short kind, ssize_t size, size_t vlen) | |
173 | { | |
174 | switch (kind) | |
175 | { | |
176 | case CTF_K_ARRAY: | |
177 | return (sizeof (ctf_array_v1_t)); | |
178 | case CTF_K_FUNCTION: | |
179 | return (sizeof (unsigned short) * (vlen + (vlen & 1))); | |
180 | case CTF_K_STRUCT: | |
181 | case CTF_K_UNION: | |
182 | if (size < CTF_LSTRUCT_THRESH_V1) | |
183 | return (sizeof (ctf_member_v1_t) * vlen); | |
184 | else | |
185 | return (sizeof (ctf_lmember_v1_t) * vlen); | |
186 | } | |
187 | ||
188 | return (get_vbytes_common (kind, size, vlen)); | |
189 | } | |
190 | ||
191 | static ssize_t | |
192 | get_vbytes_v2 (unsigned short kind, ssize_t size, size_t vlen) | |
193 | { | |
194 | switch (kind) | |
195 | { | |
196 | case CTF_K_ARRAY: | |
197 | return (sizeof (ctf_array_t)); | |
198 | case CTF_K_FUNCTION: | |
199 | return (sizeof (uint32_t) * (vlen + (vlen & 1))); | |
200 | case CTF_K_STRUCT: | |
201 | case CTF_K_UNION: | |
202 | if (size < CTF_LSTRUCT_THRESH) | |
203 | return (sizeof (ctf_member_t) * vlen); | |
204 | else | |
205 | return (sizeof (ctf_lmember_t) * vlen); | |
206 | } | |
207 | ||
208 | return (get_vbytes_common (kind, size, vlen)); | |
209 | } | |
210 | ||
211 | static const ctf_fileops_t ctf_fileops[] = { | |
212 | {NULL, NULL, NULL, NULL, NULL}, | |
213 | /* CTF_VERSION_1 */ | |
214 | {get_kind_v1, get_root_v1, get_vlen_v1, get_ctt_size_v1, get_vbytes_v1}, | |
215 | /* CTF_VERSION_1_UPGRADED_3 */ | |
216 | {get_kind_v2, get_root_v2, get_vlen_v2, get_ctt_size_v2, get_vbytes_v2}, | |
217 | /* CTF_VERSION_2 */ | |
218 | {get_kind_v2, get_root_v2, get_vlen_v2, get_ctt_size_v2, get_vbytes_v2}, | |
219 | /* CTF_VERSION_3, identical to 2: only new type kinds */ | |
220 | {get_kind_v2, get_root_v2, get_vlen_v2, get_ctt_size_v2, get_vbytes_v2}, | |
221 | }; | |
222 | ||
223 | /* Initialize the symtab translation table by filling each entry with the | |
224 | offset of the CTF type or function data corresponding to each STT_FUNC or | |
225 | STT_OBJECT entry in the symbol table. */ | |
226 | ||
227 | static int | |
228 | init_symtab (ctf_file_t *fp, const ctf_header_t *hp, | |
229 | const ctf_sect_t *sp, const ctf_sect_t *strp) | |
230 | { | |
231 | const unsigned char *symp = sp->cts_data; | |
232 | uint32_t *xp = fp->ctf_sxlate; | |
233 | uint32_t *xend = xp + fp->ctf_nsyms; | |
234 | ||
235 | uint32_t objtoff = hp->cth_objtoff; | |
236 | uint32_t funcoff = hp->cth_funcoff; | |
237 | ||
238 | uint32_t info, vlen; | |
239 | Elf64_Sym sym, *gsp; | |
240 | const char *name; | |
241 | ||
242 | /* The CTF data object and function type sections are ordered to match | |
243 | the relative order of the respective symbol types in the symtab. | |
244 | If no type information is available for a symbol table entry, a | |
245 | pad is inserted in the CTF section. As a further optimization, | |
246 | anonymous or undefined symbols are omitted from the CTF data. */ | |
247 | ||
248 | for (; xp < xend; xp++, symp += sp->cts_entsize) | |
249 | { | |
250 | if (sp->cts_entsize == sizeof (Elf32_Sym)) | |
251 | gsp = ctf_sym_to_elf64 ((Elf32_Sym *) (uintptr_t) symp, &sym); | |
252 | else | |
253 | gsp = (Elf64_Sym *) (uintptr_t) symp; | |
254 | ||
255 | if (gsp->st_name < strp->cts_size) | |
256 | name = (const char *) strp->cts_data + gsp->st_name; | |
257 | else | |
258 | name = _CTF_NULLSTR; | |
259 | ||
260 | if (gsp->st_name == 0 || gsp->st_shndx == SHN_UNDEF | |
261 | || strcmp (name, "_START_") == 0 || strcmp (name, "_END_") == 0) | |
262 | { | |
263 | *xp = -1u; | |
264 | continue; | |
265 | } | |
266 | ||
267 | switch (ELF64_ST_TYPE (gsp->st_info)) | |
268 | { | |
269 | case STT_OBJECT: | |
270 | if (objtoff >= hp->cth_funcoff | |
271 | || (gsp->st_shndx == SHN_EXTABS && gsp->st_value == 0)) | |
272 | { | |
273 | *xp = -1u; | |
274 | break; | |
275 | } | |
276 | ||
277 | *xp = objtoff; | |
278 | objtoff += sizeof (uint32_t); | |
279 | break; | |
280 | ||
281 | case STT_FUNC: | |
282 | if (funcoff >= hp->cth_typeoff) | |
283 | { | |
284 | *xp = -1u; | |
285 | break; | |
286 | } | |
287 | ||
288 | *xp = funcoff; | |
289 | ||
290 | info = *(uint32_t *) ((uintptr_t) fp->ctf_buf + funcoff); | |
291 | vlen = LCTF_INFO_VLEN (fp, info); | |
292 | ||
293 | /* If we encounter a zero pad at the end, just skip it. Otherwise | |
294 | skip over the function and its return type (+2) and the argument | |
295 | list (vlen). | |
296 | */ | |
297 | if (LCTF_INFO_KIND (fp, info) == CTF_K_UNKNOWN && vlen == 0) | |
298 | funcoff += sizeof (uint32_t); /* Skip pad. */ | |
299 | else | |
300 | funcoff += sizeof (uint32_t) * (vlen + 2); | |
301 | break; | |
302 | ||
303 | default: | |
304 | *xp = -1u; | |
305 | break; | |
306 | } | |
307 | } | |
308 | ||
309 | ctf_dprintf ("loaded %lu symtab entries\n", fp->ctf_nsyms); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* Set the CTF base pointer and derive the buf pointer from it, initializing | |
314 | everything in the ctf_file that depends on the base or buf pointers. */ | |
315 | ||
316 | static void | |
317 | ctf_set_base (ctf_file_t *fp, const ctf_header_t *hp, void *base) | |
318 | { | |
319 | fp->ctf_base = base; | |
320 | fp->ctf_buf = fp->ctf_base + sizeof (ctf_header_t); | |
321 | fp->ctf_vars = (ctf_varent_t *) ((const char *) fp->ctf_buf + | |
322 | hp->cth_varoff); | |
323 | fp->ctf_nvars = (hp->cth_typeoff - hp->cth_varoff) / sizeof (ctf_varent_t); | |
324 | ||
325 | fp->ctf_str[CTF_STRTAB_0].cts_strs = (const char *) fp->ctf_buf | |
326 | + hp->cth_stroff; | |
327 | fp->ctf_str[CTF_STRTAB_0].cts_len = hp->cth_strlen; | |
328 | ||
329 | /* If we have a parent container name and label, store the relocated | |
330 | string pointers in the CTF container for easy access later. */ | |
331 | ||
332 | /* Note: before conversion, these will be set to values that will be | |
333 | immediately invalidated by the conversion process, but the conversion | |
334 | process will call ctf_set_base() again to fix things up. */ | |
335 | ||
336 | if (hp->cth_parlabel != 0) | |
337 | fp->ctf_parlabel = ctf_strptr (fp, hp->cth_parlabel); | |
338 | if (hp->cth_parname != 0) | |
339 | fp->ctf_parname = ctf_strptr (fp, hp->cth_parname); | |
340 | ||
341 | ctf_dprintf ("ctf_set_base: parent name %s (label %s)\n", | |
342 | fp->ctf_parname ? fp->ctf_parname : "<NULL>", | |
343 | fp->ctf_parlabel ? fp->ctf_parlabel : "<NULL>"); | |
344 | } | |
345 | ||
346 | /* Free a ctf_base pointer: the pointer passed, or (if NULL) fp->ctf_base. */ | |
347 | static void | |
348 | ctf_free_base (ctf_file_t *fp, unsigned char *ctf_base, size_t ctf_size) | |
349 | { | |
350 | unsigned char *base; | |
351 | size_t size; | |
352 | ||
353 | if (ctf_base) | |
354 | { | |
355 | base = ctf_base; | |
356 | size = ctf_size; | |
357 | } | |
358 | else | |
359 | { | |
360 | base = (unsigned char *) fp->ctf_base; | |
361 | size = fp->ctf_size; | |
362 | } | |
363 | ||
364 | if (base != fp->ctf_data.cts_data && base != NULL) | |
365 | ctf_data_free (base, size); | |
366 | } | |
367 | ||
368 | /* Set the version of the CTF file. */ | |
369 | ||
370 | /* When this is reset, LCTF_* changes behaviour, but there is no guarantee that | |
371 | the variable data list associated with each type has been upgraded: the | |
372 | caller must ensure this has been done in advance. */ | |
373 | ||
374 | static void | |
375 | ctf_set_version (ctf_file_t * fp, ctf_header_t * cth, int ctf_version) | |
376 | { | |
377 | fp->ctf_version = ctf_version; | |
378 | cth->cth_version = ctf_version; | |
379 | fp->ctf_fileops = &ctf_fileops[ctf_version]; | |
380 | } | |
381 | ||
382 | /* Upgrade the type table to CTF_VERSION_3 (really CTF_VERSION_1_UPGRADED_3). | |
383 | ||
384 | The upgrade is not done in-place: the ctf_base is moved. ctf_strptr() must | |
385 | not be called before reallocation is complete. | |
386 | ||
387 | Type kinds not checked here due to nonexistence in older formats: | |
388 | CTF_K_SLICE. */ | |
389 | static int | |
390 | upgrade_types (ctf_file_t *fp, ctf_header_t *cth) | |
391 | { | |
392 | const ctf_type_v1_t *tbuf; | |
393 | const ctf_type_v1_t *tend; | |
394 | unsigned char *ctf_base, *old_ctf_base = (unsigned char *) fp->ctf_base; | |
395 | size_t old_ctf_size = fp->ctf_size; | |
396 | ctf_type_t *t2buf; | |
397 | ||
398 | ssize_t increase = 0, size, increment, v2increment, vbytes, v2bytes; | |
399 | const ctf_type_v1_t *tp; | |
400 | ctf_type_t *t2p; | |
401 | ctf_header_t *new_cth; | |
402 | ||
403 | tbuf = (ctf_type_v1_t *) (fp->ctf_buf + cth->cth_typeoff); | |
404 | tend = (ctf_type_v1_t *) (fp->ctf_buf + cth->cth_stroff); | |
405 | ||
406 | /* Much like init_types(), this is a two-pass process. | |
407 | ||
408 | First, figure out the new type-section size needed. (It is possible, | |
409 | in theory, for it to be less than the old size, but this is very | |
410 | unlikely. It cannot be so small that cth_typeoff ends up of negative | |
411 | size. We validate this with an assertion below.) | |
412 | ||
413 | We must cater not only for changes in vlen and types sizes but also | |
414 | for changes in 'increment', which happen because v2 places some types | |
415 | into ctf_stype_t where v1 would be forced to use the larger non-stype. */ | |
416 | ||
417 | for (tp = tbuf; tp < tend; | |
418 | tp = (ctf_type_v1_t *) ((uintptr_t) tp + increment + vbytes)) | |
419 | { | |
420 | unsigned short kind = CTF_V1_INFO_KIND (tp->ctt_info); | |
421 | unsigned long vlen = CTF_V1_INFO_VLEN (tp->ctt_info); | |
422 | ||
423 | size = get_ctt_size_v1 (fp, (const ctf_type_t *) tp, NULL, &increment); | |
424 | vbytes = get_vbytes_v1 (kind, size, vlen); | |
425 | ||
426 | get_ctt_size_v2_unconverted (fp, (const ctf_type_t *) tp, NULL, | |
427 | &v2increment); | |
428 | v2bytes = get_vbytes_v2 (kind, size, vlen); | |
429 | ||
430 | if ((vbytes < 0) || (size < 0)) | |
431 | return ECTF_CORRUPT; | |
432 | ||
433 | increase += v2increment - increment; /* May be negative. */ | |
434 | increase += v2bytes - vbytes; | |
435 | } | |
436 | ||
437 | /* Allocate enough room for the new buffer, then copy everything but the | |
438 | type section into place, and reset the base accordingly. Leave the | |
439 | version number unchanged, so that LCTF_INFO_* still works on the | |
440 | as-yet-untranslated type info. */ | |
441 | ||
442 | if ((ctf_base = ctf_data_alloc (fp->ctf_size + increase)) == NULL) | |
443 | return ECTF_ZALLOC; | |
444 | ||
445 | memcpy (ctf_base, fp->ctf_base, sizeof (ctf_header_t) + cth->cth_typeoff); | |
446 | memcpy (ctf_base + sizeof (ctf_header_t) + cth->cth_stroff + increase, | |
447 | fp->ctf_base + sizeof (ctf_header_t) + cth->cth_stroff, | |
448 | cth->cth_strlen); | |
449 | ||
450 | memset (ctf_base + sizeof (ctf_header_t) + cth->cth_typeoff, 0, | |
451 | cth->cth_stroff - cth->cth_typeoff + increase); | |
452 | ||
453 | /* The cth here is an automatic variable in ctf_bufopen(), and transient | |
454 | (a copy maintained because at that stage the header read out of the | |
455 | ctf file may be read-only). We make all modifications in the | |
456 | canonical copy at ctf_base (by now, writable), then copy it back into | |
457 | cth at the end. */ | |
458 | ||
459 | new_cth = (ctf_header_t *) ctf_base; | |
460 | new_cth->cth_stroff += increase; | |
461 | fp->ctf_size += increase; | |
462 | assert (new_cth->cth_stroff >= new_cth->cth_typeoff); | |
463 | ctf_set_base (fp, new_cth, ctf_base); | |
464 | ||
465 | t2buf = (ctf_type_t *) (fp->ctf_buf + new_cth->cth_typeoff); | |
466 | ||
467 | /* Iterate through all the types again, upgrading them. | |
468 | ||
469 | Everything that hasn't changed can just be outright memcpy()ed. | |
470 | Things that have changed need field-by-field consideration. */ | |
471 | ||
472 | for (tp = tbuf, t2p = t2buf; tp < tend; | |
473 | tp = (ctf_type_v1_t *) ((uintptr_t) tp + increment + vbytes), | |
474 | t2p = (ctf_type_t *) ((uintptr_t) t2p + v2increment + v2bytes)) | |
475 | { | |
476 | unsigned short kind = CTF_V1_INFO_KIND (tp->ctt_info); | |
477 | int isroot = CTF_V1_INFO_ISROOT (tp->ctt_info); | |
478 | unsigned long vlen = CTF_V1_INFO_VLEN (tp->ctt_info); | |
479 | ssize_t v2size; | |
480 | void *vdata, *v2data; | |
481 | ||
482 | size = get_ctt_size_v1 (fp, (const ctf_type_t *) tp, NULL, &increment); | |
483 | vbytes = get_vbytes_v1 (kind, size, vlen); | |
484 | ||
485 | t2p->ctt_name = tp->ctt_name; | |
486 | t2p->ctt_info = CTF_TYPE_INFO (kind, isroot, vlen); | |
487 | ||
488 | switch (kind) | |
489 | { | |
490 | case CTF_K_FUNCTION: | |
491 | case CTF_K_FORWARD: | |
492 | case CTF_K_TYPEDEF: | |
493 | case CTF_K_POINTER: | |
494 | case CTF_K_VOLATILE: | |
495 | case CTF_K_CONST: | |
496 | case CTF_K_RESTRICT: | |
497 | t2p->ctt_type = tp->ctt_type; | |
498 | break; | |
499 | case CTF_K_INTEGER: | |
500 | case CTF_K_FLOAT: | |
501 | case CTF_K_ARRAY: | |
502 | case CTF_K_STRUCT: | |
503 | case CTF_K_UNION: | |
504 | case CTF_K_ENUM: | |
505 | case CTF_K_UNKNOWN: | |
a0486bac | 506 | if ((size_t) size <= CTF_MAX_SIZE) |
72f33921 NA |
507 | t2p->ctt_size = size; |
508 | else | |
509 | { | |
510 | t2p->ctt_lsizehi = CTF_SIZE_TO_LSIZE_HI (size); | |
511 | t2p->ctt_lsizelo = CTF_SIZE_TO_LSIZE_LO (size); | |
512 | } | |
513 | break; | |
514 | } | |
515 | ||
516 | v2size = get_ctt_size_v2 (fp, t2p, NULL, &v2increment); | |
517 | v2bytes = get_vbytes_v2 (kind, v2size, vlen); | |
518 | ||
519 | /* Catch out-of-sync get_ctt_size_*(). The count goes wrong if | |
520 | these are not identical (and having them different makes no | |
521 | sense semantically). */ | |
522 | ||
523 | assert (size == v2size); | |
524 | ||
525 | /* Now the varlen info. */ | |
526 | ||
527 | vdata = (void *) ((uintptr_t) tp + increment); | |
528 | v2data = (void *) ((uintptr_t) t2p + v2increment); | |
529 | ||
530 | switch (kind) | |
531 | { | |
532 | case CTF_K_ARRAY: | |
533 | { | |
534 | const ctf_array_v1_t *ap = (const ctf_array_v1_t *) vdata; | |
535 | ctf_array_t *a2p = (ctf_array_t *) v2data; | |
536 | ||
537 | a2p->cta_contents = ap->cta_contents; | |
538 | a2p->cta_index = ap->cta_index; | |
539 | a2p->cta_nelems = ap->cta_nelems; | |
540 | break; | |
541 | } | |
542 | case CTF_K_STRUCT: | |
543 | case CTF_K_UNION: | |
544 | { | |
545 | ctf_member_t tmp; | |
546 | const ctf_member_v1_t *m1 = (const ctf_member_v1_t *) vdata; | |
547 | const ctf_lmember_v1_t *lm1 = (const ctf_lmember_v1_t *) m1; | |
548 | ctf_member_t *m2 = (ctf_member_t *) v2data; | |
549 | ctf_lmember_t *lm2 = (ctf_lmember_t *) m2; | |
550 | unsigned long i; | |
551 | ||
552 | /* We walk all four pointers forward, but only reference the two | |
553 | that are valid for the given size, to avoid quadruplicating all | |
554 | the code. */ | |
555 | ||
556 | for (i = vlen; i != 0; i--, m1++, lm1++, m2++, lm2++) | |
557 | { | |
558 | size_t offset; | |
559 | if (size < CTF_LSTRUCT_THRESH_V1) | |
560 | { | |
561 | offset = m1->ctm_offset; | |
562 | tmp.ctm_name = m1->ctm_name; | |
563 | tmp.ctm_type = m1->ctm_type; | |
564 | } | |
565 | else | |
566 | { | |
567 | offset = CTF_LMEM_OFFSET (lm1); | |
568 | tmp.ctm_name = lm1->ctlm_name; | |
569 | tmp.ctm_type = lm1->ctlm_type; | |
570 | } | |
571 | if (size < CTF_LSTRUCT_THRESH) | |
572 | { | |
573 | m2->ctm_name = tmp.ctm_name; | |
574 | m2->ctm_type = tmp.ctm_type; | |
575 | m2->ctm_offset = offset; | |
576 | } | |
577 | else | |
578 | { | |
579 | lm2->ctlm_name = tmp.ctm_name; | |
580 | lm2->ctlm_type = tmp.ctm_type; | |
581 | lm2->ctlm_offsethi = CTF_OFFSET_TO_LMEMHI (offset); | |
582 | lm2->ctlm_offsetlo = CTF_OFFSET_TO_LMEMLO (offset); | |
583 | } | |
584 | } | |
585 | break; | |
586 | } | |
587 | case CTF_K_FUNCTION: | |
588 | { | |
589 | unsigned long i; | |
590 | unsigned short *a1 = (unsigned short *) vdata; | |
591 | uint32_t *a2 = (uint32_t *) v2data; | |
592 | ||
593 | for (i = vlen; i != 0; i--, a1++, a2++) | |
594 | *a2 = *a1; | |
595 | } | |
596 | /* FALLTHRU */ | |
597 | default: | |
598 | /* Catch out-of-sync get_vbytes_*(). */ | |
599 | assert (vbytes == v2bytes); | |
600 | memcpy (v2data, vdata, vbytes); | |
601 | } | |
602 | } | |
603 | ||
604 | /* Verify that the entire region was converted. If not, we are either | |
605 | converting too much, or too little (leading to a buffer overrun either here | |
606 | or at read time, in init_types().) */ | |
607 | ||
608 | assert ((size_t) t2p - (size_t) fp->ctf_buf == new_cth->cth_stroff); | |
609 | ||
610 | ctf_set_version (fp, (ctf_header_t *) ctf_base, CTF_VERSION_1_UPGRADED_3); | |
611 | ctf_free_base (fp, old_ctf_base, old_ctf_size); | |
612 | memcpy (cth, new_cth, sizeof (ctf_header_t)); | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | /* Initialize the type ID translation table with the byte offset of each type, | |
618 | and initialize the hash tables of each named type. Upgrade the type table to | |
619 | the latest supported representation in the process, if needed, and if this | |
620 | recension of libctf supports upgrading. */ | |
621 | ||
622 | static int | |
623 | init_types (ctf_file_t *fp, ctf_header_t *cth) | |
624 | { | |
625 | const ctf_type_t *tbuf; | |
626 | const ctf_type_t *tend; | |
627 | ||
628 | unsigned long pop[CTF_K_MAX + 1] = { 0 }; | |
629 | const ctf_type_t *tp; | |
630 | ctf_hash_t *hp; | |
631 | uint32_t id, dst; | |
632 | uint32_t *xp; | |
633 | ||
634 | /* We determine whether the container is a child or a parent based on | |
635 | the value of cth_parname. */ | |
636 | ||
637 | int child = cth->cth_parname != 0; | |
638 | int nlstructs = 0, nlunions = 0; | |
639 | int err; | |
640 | ||
641 | if (_libctf_unlikely_ (fp->ctf_version == CTF_VERSION_1)) | |
642 | { | |
643 | int err; | |
644 | if ((err = upgrade_types (fp, cth)) != 0) | |
645 | return err; /* Upgrade failed. */ | |
646 | } | |
647 | ||
648 | tbuf = (ctf_type_t *) (fp->ctf_buf + cth->cth_typeoff); | |
649 | tend = (ctf_type_t *) (fp->ctf_buf + cth->cth_stroff); | |
650 | ||
651 | /* We make two passes through the entire type section. In this first | |
652 | pass, we count the number of each type and the total number of types. */ | |
653 | ||
654 | for (tp = tbuf; tp < tend; fp->ctf_typemax++) | |
655 | { | |
656 | unsigned short kind = LCTF_INFO_KIND (fp, tp->ctt_info); | |
657 | unsigned long vlen = LCTF_INFO_VLEN (fp, tp->ctt_info); | |
658 | ssize_t size, increment, vbytes; | |
659 | ||
660 | (void) ctf_get_ctt_size (fp, tp, &size, &increment); | |
661 | vbytes = LCTF_VBYTES (fp, kind, size, vlen); | |
662 | ||
663 | if (vbytes < 0) | |
664 | return ECTF_CORRUPT; | |
665 | ||
666 | if (kind == CTF_K_FORWARD) | |
667 | { | |
668 | /* For forward declarations, ctt_type is the CTF_K_* kind for the tag, | |
669 | so bump that population count too. If ctt_type is unknown, treat | |
670 | the tag as a struct. */ | |
671 | ||
672 | if (tp->ctt_type == CTF_K_UNKNOWN || tp->ctt_type >= CTF_K_MAX) | |
673 | pop[CTF_K_STRUCT]++; | |
674 | else | |
675 | pop[tp->ctt_type]++; | |
676 | } | |
677 | tp = (ctf_type_t *) ((uintptr_t) tp + increment + vbytes); | |
678 | pop[kind]++; | |
679 | } | |
680 | ||
681 | if (child) | |
682 | { | |
683 | ctf_dprintf ("CTF container %p is a child\n", (void *) fp); | |
684 | fp->ctf_flags |= LCTF_CHILD; | |
685 | } | |
686 | else | |
687 | ctf_dprintf ("CTF container %p is a parent\n", (void *) fp); | |
688 | ||
689 | /* Now that we've counted up the number of each type, we can allocate | |
690 | the hash tables, type translation table, and pointer table. */ | |
691 | ||
692 | if ((fp->ctf_structs = ctf_hash_create (pop[CTF_K_STRUCT], ctf_hash_string, | |
693 | ctf_hash_eq_string)) == NULL) | |
694 | return ENOMEM; | |
695 | ||
696 | if ((fp->ctf_unions = ctf_hash_create (pop[CTF_K_UNION], ctf_hash_string, | |
697 | ctf_hash_eq_string)) == NULL) | |
698 | return ENOMEM; | |
699 | ||
700 | if ((fp->ctf_enums = ctf_hash_create (pop[CTF_K_ENUM], ctf_hash_string, | |
701 | ctf_hash_eq_string)) == NULL) | |
702 | return ENOMEM; | |
703 | ||
704 | if ((fp->ctf_names = ctf_hash_create (pop[CTF_K_INTEGER] + | |
705 | pop[CTF_K_FLOAT] + | |
706 | pop[CTF_K_FUNCTION] + | |
707 | pop[CTF_K_TYPEDEF] + | |
708 | pop[CTF_K_POINTER] + | |
709 | pop[CTF_K_VOLATILE] + | |
710 | pop[CTF_K_CONST] + | |
711 | pop[CTF_K_RESTRICT], | |
712 | ctf_hash_string, | |
713 | ctf_hash_eq_string)) == NULL) | |
714 | return ENOMEM; | |
715 | ||
716 | fp->ctf_txlate = ctf_alloc (sizeof (uint32_t) * (fp->ctf_typemax + 1)); | |
717 | fp->ctf_ptrtab = ctf_alloc (sizeof (uint32_t) * (fp->ctf_typemax + 1)); | |
718 | ||
719 | if (fp->ctf_txlate == NULL || fp->ctf_ptrtab == NULL) | |
720 | return ENOMEM; /* Memory allocation failed. */ | |
721 | ||
722 | xp = fp->ctf_txlate; | |
723 | *xp++ = 0; /* Type id 0 is used as a sentinel value. */ | |
724 | ||
725 | memset (fp->ctf_txlate, 0, sizeof (uint32_t) * (fp->ctf_typemax + 1)); | |
726 | memset (fp->ctf_ptrtab, 0, sizeof (uint32_t) * (fp->ctf_typemax + 1)); | |
727 | ||
728 | /* In the second pass through the types, we fill in each entry of the | |
729 | type and pointer tables and add names to the appropriate hashes. */ | |
730 | ||
731 | for (id = 1, tp = tbuf; tp < tend; xp++, id++) | |
732 | { | |
733 | unsigned short kind = LCTF_INFO_KIND (fp, tp->ctt_info); | |
734 | unsigned short flag = LCTF_INFO_ISROOT (fp, tp->ctt_info); | |
735 | unsigned long vlen = LCTF_INFO_VLEN (fp, tp->ctt_info); | |
736 | ssize_t size, increment, vbytes; | |
737 | ||
738 | const char *name; | |
739 | ||
740 | (void) ctf_get_ctt_size (fp, tp, &size, &increment); | |
741 | name = ctf_strptr (fp, tp->ctt_name); | |
742 | vbytes = LCTF_VBYTES (fp, kind, size, vlen); | |
743 | ||
744 | switch (kind) | |
745 | { | |
746 | case CTF_K_INTEGER: | |
747 | case CTF_K_FLOAT: | |
748 | /* Names are reused by bit-fields, which are differentiated by their | |
749 | encodings, and so typically we'd record only the first instance of | |
750 | a given intrinsic. However, we replace an existing type with a | |
751 | root-visible version so that we can be sure to find it when | |
752 | checking for conflicting definitions in ctf_add_type(). */ | |
753 | ||
754 | if (((ctf_hash_lookup_type (fp->ctf_names, fp, name)) == 0) | |
755 | || (flag & CTF_ADD_ROOT)) | |
756 | { | |
757 | err = ctf_hash_define_type (fp->ctf_names, fp, | |
758 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
759 | tp->ctt_name); | |
760 | if (err != 0 && err != ECTF_STRTAB) | |
761 | return err; | |
762 | } | |
763 | break; | |
764 | ||
765 | /* These kinds have no name, so do not need interning into any | |
766 | hashtables. */ | |
767 | case CTF_K_ARRAY: | |
768 | case CTF_K_SLICE: | |
769 | break; | |
770 | ||
771 | case CTF_K_FUNCTION: | |
772 | err = ctf_hash_insert_type (fp->ctf_names, fp, | |
773 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
774 | tp->ctt_name); | |
775 | if (err != 0 && err != ECTF_STRTAB) | |
776 | return err; | |
777 | break; | |
778 | ||
779 | case CTF_K_STRUCT: | |
780 | err = ctf_hash_define_type (fp->ctf_structs, fp, | |
781 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
782 | tp->ctt_name); | |
783 | ||
784 | if (err != 0 && err != ECTF_STRTAB) | |
785 | return err; | |
786 | ||
787 | if (size >= CTF_LSTRUCT_THRESH) | |
788 | nlstructs++; | |
789 | break; | |
790 | ||
791 | case CTF_K_UNION: | |
792 | err = ctf_hash_define_type (fp->ctf_unions, fp, | |
793 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
794 | tp->ctt_name); | |
795 | ||
796 | if (err != 0 && err != ECTF_STRTAB) | |
797 | return err; | |
798 | ||
799 | if (size >= CTF_LSTRUCT_THRESH) | |
800 | nlunions++; | |
801 | break; | |
802 | ||
803 | case CTF_K_ENUM: | |
804 | err = ctf_hash_define_type (fp->ctf_enums, fp, | |
805 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
806 | tp->ctt_name); | |
807 | ||
808 | if (err != 0 && err != ECTF_STRTAB) | |
809 | return err; | |
810 | break; | |
811 | ||
812 | case CTF_K_TYPEDEF: | |
813 | err = ctf_hash_insert_type (fp->ctf_names, fp, | |
814 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
815 | tp->ctt_name); | |
816 | if (err != 0 && err != ECTF_STRTAB) | |
817 | return err; | |
818 | break; | |
819 | ||
820 | case CTF_K_FORWARD: | |
821 | /* Only insert forward tags into the given hash if the type or tag | |
822 | name is not already present. */ | |
823 | switch (tp->ctt_type) | |
824 | { | |
825 | case CTF_K_STRUCT: | |
826 | hp = fp->ctf_structs; | |
827 | break; | |
828 | case CTF_K_UNION: | |
829 | hp = fp->ctf_unions; | |
830 | break; | |
831 | case CTF_K_ENUM: | |
832 | hp = fp->ctf_enums; | |
833 | break; | |
834 | default: | |
835 | hp = fp->ctf_structs; | |
836 | } | |
837 | ||
838 | if (ctf_hash_lookup_type (hp, fp, name) == 0) | |
839 | { | |
840 | err = ctf_hash_insert_type (hp, fp, | |
841 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
842 | tp->ctt_name); | |
843 | if (err != 0 && err != ECTF_STRTAB) | |
844 | return err; | |
845 | } | |
846 | break; | |
847 | ||
848 | case CTF_K_POINTER: | |
849 | /* If the type referenced by the pointer is in this CTF container, | |
850 | then store the index of the pointer type in | |
851 | fp->ctf_ptrtab[ index of referenced type ]. */ | |
852 | ||
853 | if (LCTF_TYPE_ISCHILD (fp, tp->ctt_type) == child | |
854 | && LCTF_TYPE_TO_INDEX (fp, tp->ctt_type) <= fp->ctf_typemax) | |
855 | fp->ctf_ptrtab[LCTF_TYPE_TO_INDEX (fp, tp->ctt_type)] = id; | |
856 | /*FALLTHRU*/ | |
857 | ||
858 | case CTF_K_VOLATILE: | |
859 | case CTF_K_CONST: | |
860 | case CTF_K_RESTRICT: | |
861 | err = ctf_hash_insert_type (fp->ctf_names, fp, | |
862 | LCTF_INDEX_TO_TYPE (fp, id, child), | |
863 | tp->ctt_name); | |
864 | if (err != 0 && err != ECTF_STRTAB) | |
865 | return err; | |
866 | break; | |
867 | } | |
868 | ||
869 | *xp = (uint32_t) ((uintptr_t) tp - (uintptr_t) fp->ctf_buf); | |
870 | tp = (ctf_type_t *) ((uintptr_t) tp + increment + vbytes); | |
871 | } | |
872 | ||
873 | ctf_dprintf ("%lu total types processed\n", fp->ctf_typemax); | |
874 | ctf_dprintf ("%u enum names hashed\n", ctf_hash_size (fp->ctf_enums)); | |
875 | ctf_dprintf ("%u struct names hashed (%d long)\n", | |
876 | ctf_hash_size (fp->ctf_structs), nlstructs); | |
877 | ctf_dprintf ("%u union names hashed (%d long)\n", | |
878 | ctf_hash_size (fp->ctf_unions), nlunions); | |
879 | ctf_dprintf ("%u base type names hashed\n", ctf_hash_size (fp->ctf_names)); | |
880 | ||
881 | /* Make an additional pass through the pointer table to find pointers that | |
882 | point to anonymous typedef nodes. If we find one, modify the pointer table | |
883 | so that the pointer is also known to point to the node that is referenced | |
884 | by the anonymous typedef node. */ | |
885 | ||
886 | for (id = 1; id <= fp->ctf_typemax; id++) | |
887 | { | |
888 | if ((dst = fp->ctf_ptrtab[id]) != 0) | |
889 | { | |
890 | tp = LCTF_INDEX_TO_TYPEPTR (fp, id); | |
891 | ||
892 | if (LCTF_INFO_KIND (fp, tp->ctt_info) == CTF_K_TYPEDEF && | |
893 | strcmp (ctf_strptr (fp, tp->ctt_name), "") == 0 && | |
894 | LCTF_TYPE_ISCHILD (fp, tp->ctt_type) == child && | |
895 | LCTF_TYPE_TO_INDEX (fp, tp->ctt_type) <= fp->ctf_typemax) | |
896 | fp->ctf_ptrtab[LCTF_TYPE_TO_INDEX (fp, tp->ctt_type)] = dst; | |
897 | } | |
898 | } | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | /* Endianness-flipping routines. | |
904 | ||
905 | We flip everything, mindlessly, even 1-byte entities, so that future | |
906 | expansions do not require changes to this code. */ | |
907 | ||
908 | /* < C11? define away static assertions. */ | |
909 | ||
910 | #if !defined (__STDC_VERSION__) || __STDC_VERSION__ < 201112L | |
911 | #define _Static_assert(cond, err) | |
912 | #endif | |
913 | ||
914 | /* Swap the endianness of something. */ | |
915 | ||
916 | #define swap_thing(x) \ | |
917 | do { \ | |
918 | _Static_assert (sizeof (x) == 1 || (sizeof (x) % 2 == 0 \ | |
919 | && sizeof (x) <= 8), \ | |
920 | "Invalid size, update endianness code"); \ | |
921 | switch (sizeof (x)) { \ | |
922 | case 2: x = bswap_16 (x); break; \ | |
923 | case 4: x = bswap_32 (x); break; \ | |
924 | case 8: x = bswap_64 (x); break; \ | |
925 | case 1: /* Nothing needs doing */ \ | |
926 | break; \ | |
927 | } \ | |
928 | } while (0); | |
929 | ||
930 | /* Flip the endianness of the CTF header. */ | |
931 | ||
932 | static void | |
933 | flip_header (ctf_header_t *cth) | |
934 | { | |
935 | swap_thing (cth->cth_preamble.ctp_magic); | |
936 | swap_thing (cth->cth_preamble.ctp_version); | |
937 | swap_thing (cth->cth_preamble.ctp_flags); | |
938 | swap_thing (cth->cth_parlabel); | |
939 | swap_thing (cth->cth_parname); | |
940 | swap_thing (cth->cth_objtoff); | |
941 | swap_thing (cth->cth_funcoff); | |
942 | swap_thing (cth->cth_varoff); | |
943 | swap_thing (cth->cth_typeoff); | |
944 | swap_thing (cth->cth_stroff); | |
945 | swap_thing (cth->cth_strlen); | |
946 | } | |
947 | ||
948 | /* Flip the endianness of the label section, an array of ctf_lblent_t. */ | |
949 | ||
950 | static void | |
951 | flip_lbls (void *start, size_t len) | |
952 | { | |
953 | ctf_lblent_t *lbl = start; | |
954 | ||
955 | for (ssize_t i = len / sizeof (struct ctf_lblent); i > 0; lbl++, i--) | |
956 | { | |
957 | swap_thing (lbl->ctl_label); | |
958 | swap_thing (lbl->ctl_type); | |
959 | } | |
960 | } | |
961 | ||
962 | /* Flip the endianness of the data-object or function sections, an array of | |
963 | uint32_t. (The function section has more internal structure, but that | |
964 | structure is an array of uint32_t, so can be treated as one big array for | |
965 | byte-swapping.) */ | |
966 | ||
967 | static void | |
968 | flip_objts (void *start, size_t len) | |
969 | { | |
970 | uint32_t *obj = start; | |
971 | ||
972 | for (ssize_t i = len / sizeof (uint32_t); i > 0; obj++, i--) | |
973 | swap_thing (*obj); | |
974 | } | |
975 | ||
976 | /* Flip the endianness of the variable section, an array of ctf_varent_t. */ | |
977 | ||
978 | static void | |
979 | flip_vars (void *start, size_t len) | |
980 | { | |
981 | ctf_varent_t *var = start; | |
982 | ||
983 | for (ssize_t i = len / sizeof (struct ctf_varent); i > 0; var++, i--) | |
984 | { | |
985 | swap_thing (var->ctv_name); | |
986 | swap_thing (var->ctv_type); | |
987 | } | |
988 | } | |
989 | ||
990 | /* Flip the endianness of the type section, a tagged array of ctf_type or | |
991 | ctf_stype followed by variable data. */ | |
992 | ||
993 | static int | |
994 | flip_types (void *start, size_t len) | |
995 | { | |
996 | ctf_type_t *t = start; | |
997 | ||
998 | while ((uintptr_t) t < ((uintptr_t) start) + len) | |
999 | { | |
1000 | swap_thing (t->ctt_name); | |
1001 | swap_thing (t->ctt_info); | |
1002 | swap_thing (t->ctt_size); | |
1003 | ||
1004 | uint32_t kind = CTF_V2_INFO_KIND (t->ctt_info); | |
1005 | size_t size = t->ctt_size; | |
1006 | uint32_t vlen = CTF_V2_INFO_VLEN (t->ctt_info); | |
1007 | size_t vbytes = get_vbytes_v2 (kind, size, vlen); | |
1008 | ||
1009 | if (_libctf_unlikely_ (size == CTF_LSIZE_SENT)) | |
1010 | { | |
1011 | swap_thing (t->ctt_lsizehi); | |
1012 | swap_thing (t->ctt_lsizelo); | |
1013 | size = CTF_TYPE_LSIZE (t); | |
1014 | t = (ctf_type_t *) ((uintptr_t) t + sizeof (ctf_type_t)); | |
1015 | } | |
1016 | else | |
1017 | t = (ctf_type_t *) ((uintptr_t) t + sizeof (ctf_stype_t)); | |
1018 | ||
1019 | switch (kind) | |
1020 | { | |
1021 | case CTF_K_FORWARD: | |
1022 | case CTF_K_UNKNOWN: | |
1023 | case CTF_K_POINTER: | |
1024 | case CTF_K_TYPEDEF: | |
1025 | case CTF_K_VOLATILE: | |
1026 | case CTF_K_CONST: | |
1027 | case CTF_K_RESTRICT: | |
1028 | /* These types have no vlen data to swap. */ | |
1029 | assert (vbytes == 0); | |
1030 | break; | |
1031 | ||
1032 | case CTF_K_INTEGER: | |
1033 | case CTF_K_FLOAT: | |
1034 | { | |
1035 | /* These types have a single uint32_t. */ | |
1036 | ||
1037 | uint32_t *item = (uint32_t *) t; | |
1038 | ||
1039 | swap_thing (*item); | |
1040 | break; | |
1041 | } | |
1042 | ||
1043 | case CTF_K_FUNCTION: | |
1044 | { | |
1045 | /* This type has a bunch of uint32_ts. */ | |
1046 | ||
1047 | uint32_t *item = (uint32_t *) t; | |
1048 | ||
1049 | for (ssize_t i = vlen; i > 0; item++, i--) | |
1050 | swap_thing (*item); | |
1051 | break; | |
1052 | } | |
1053 | ||
1054 | case CTF_K_ARRAY: | |
1055 | { | |
1056 | /* This has a single ctf_array_t. */ | |
1057 | ||
1058 | ctf_array_t *a = (ctf_array_t *) t; | |
1059 | ||
1060 | assert (vbytes == sizeof (ctf_array_t)); | |
1061 | swap_thing (a->cta_contents); | |
1062 | swap_thing (a->cta_index); | |
1063 | swap_thing (a->cta_nelems); | |
1064 | ||
1065 | break; | |
1066 | } | |
1067 | ||
1068 | case CTF_K_SLICE: | |
1069 | { | |
1070 | /* This has a single ctf_slice_t. */ | |
1071 | ||
1072 | ctf_slice_t *s = (ctf_slice_t *) t; | |
1073 | ||
1074 | assert (vbytes == sizeof (ctf_slice_t)); | |
1075 | swap_thing (s->cts_type); | |
1076 | swap_thing (s->cts_offset); | |
1077 | swap_thing (s->cts_bits); | |
1078 | ||
1079 | break; | |
1080 | } | |
1081 | ||
1082 | case CTF_K_STRUCT: | |
1083 | case CTF_K_UNION: | |
1084 | { | |
1085 | /* This has an array of ctf_member or ctf_lmember, depending on | |
1086 | size. We could consider it to be a simple array of uint32_t, | |
1087 | but for safety's sake in case these structures ever acquire | |
1088 | non-uint32_t members, do it member by member. */ | |
1089 | ||
1090 | if (_libctf_unlikely_ (size >= CTF_LSTRUCT_THRESH)) | |
1091 | { | |
1092 | ctf_lmember_t *lm = (ctf_lmember_t *) t; | |
1093 | for (ssize_t i = vlen; i > 0; i--, lm++) | |
1094 | { | |
1095 | swap_thing (lm->ctlm_name); | |
1096 | swap_thing (lm->ctlm_offsethi); | |
1097 | swap_thing (lm->ctlm_type); | |
1098 | swap_thing (lm->ctlm_offsetlo); | |
1099 | } | |
1100 | } | |
1101 | else | |
1102 | { | |
1103 | ctf_member_t *m = (ctf_member_t *) t; | |
1104 | for (ssize_t i = vlen; i > 0; i--, m++) | |
1105 | { | |
1106 | swap_thing (m->ctm_name); | |
1107 | swap_thing (m->ctm_offset); | |
1108 | swap_thing (m->ctm_type); | |
1109 | } | |
1110 | } | |
1111 | break; | |
1112 | } | |
1113 | ||
1114 | case CTF_K_ENUM: | |
1115 | { | |
1116 | /* This has an array of ctf_enum_t. */ | |
1117 | ||
1118 | ctf_enum_t *item = (ctf_enum_t *) t; | |
1119 | ||
1120 | for (ssize_t i = vlen; i > 0; item++, i--) | |
1121 | { | |
1122 | swap_thing (item->cte_name); | |
1123 | swap_thing (item->cte_value); | |
1124 | } | |
1125 | break; | |
1126 | } | |
1127 | default: | |
1128 | ctf_dprintf ("unhandled CTF kind in endianness conversion -- %x\n", | |
1129 | kind); | |
1130 | return ECTF_CORRUPT; | |
1131 | } | |
1132 | ||
1133 | t = (ctf_type_t *) ((uintptr_t) t + vbytes); | |
1134 | } | |
1135 | ||
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | /* Flip the endianness of BASE, given the offsets in the (already endian- | |
1140 | converted) CTH. | |
1141 | ||
1142 | All of this stuff happens before the header is fully initialized, so the | |
1143 | LCTF_*() macros cannot be used yet. Since we do not try to endian-convert v1 | |
1144 | data, this is no real loss. */ | |
1145 | ||
1146 | static int | |
1147 | flip_ctf (ctf_header_t *cth, unsigned char *base) | |
1148 | { | |
1149 | base += sizeof (ctf_header_t); | |
1150 | ||
1151 | flip_lbls (base + cth->cth_lbloff, cth->cth_objtoff - cth->cth_lbloff); | |
1152 | flip_objts (base + cth->cth_objtoff, cth->cth_funcoff - cth->cth_objtoff); | |
1153 | flip_objts (base + cth->cth_funcoff, cth->cth_varoff - cth->cth_funcoff); | |
1154 | flip_vars (base + cth->cth_varoff, cth->cth_typeoff - cth->cth_varoff); | |
1155 | return flip_types (base + cth->cth_typeoff, cth->cth_stroff - cth->cth_typeoff); | |
1156 | } | |
1157 | ||
1158 | /* Open a CTF file, mocking up a suitable ctf_sect. */ | |
1159 | ctf_file_t *ctf_simple_open (const char *ctfsect, size_t ctfsect_size, | |
1160 | const char *symsect, size_t symsect_size, | |
1161 | size_t symsect_entsize, | |
1162 | const char *strsect, size_t strsect_size, | |
1163 | int *errp) | |
1164 | { | |
1165 | ctf_sect_t skeleton; | |
1166 | ||
1167 | ctf_sect_t ctf_sect, sym_sect, str_sect; | |
1168 | ctf_sect_t *ctfsectp = NULL; | |
1169 | ctf_sect_t *symsectp = NULL; | |
1170 | ctf_sect_t *strsectp = NULL; | |
1171 | ||
1172 | skeleton.cts_name = _CTF_SECTION; | |
72f33921 | 1173 | skeleton.cts_entsize = 1; |
72f33921 NA |
1174 | |
1175 | if (ctfsect) | |
1176 | { | |
1177 | memcpy (&ctf_sect, &skeleton, sizeof (struct ctf_sect)); | |
1178 | ctf_sect.cts_data = ctfsect; | |
1179 | ctf_sect.cts_size = ctfsect_size; | |
1180 | ctfsectp = &ctf_sect; | |
1181 | } | |
1182 | ||
1183 | if (symsect) | |
1184 | { | |
1185 | memcpy (&sym_sect, &skeleton, sizeof (struct ctf_sect)); | |
1186 | sym_sect.cts_data = symsect; | |
1187 | sym_sect.cts_size = symsect_size; | |
1188 | sym_sect.cts_entsize = symsect_entsize; | |
1189 | symsectp = &sym_sect; | |
1190 | } | |
1191 | ||
1192 | if (strsect) | |
1193 | { | |
1194 | memcpy (&str_sect, &skeleton, sizeof (struct ctf_sect)); | |
1195 | str_sect.cts_data = strsect; | |
1196 | str_sect.cts_size = strsect_size; | |
1197 | strsectp = &str_sect; | |
1198 | } | |
1199 | ||
1200 | return ctf_bufopen (ctfsectp, symsectp, strsectp, errp); | |
1201 | } | |
1202 | ||
1203 | /* Decode the specified CTF buffer and optional symbol table, and create a new | |
1204 | CTF container representing the symbolic debugging information. This code can | |
1205 | be used directly by the debugger, or it can be used as the engine for | |
1206 | ctf_fdopen() or ctf_open(), below. */ | |
1207 | ||
1208 | ctf_file_t * | |
1209 | ctf_bufopen (const ctf_sect_t *ctfsect, const ctf_sect_t *symsect, | |
1210 | const ctf_sect_t *strsect, int *errp) | |
1211 | { | |
1212 | const ctf_preamble_t *pp; | |
1213 | ctf_header_t hp; | |
1214 | ctf_file_t *fp; | |
1215 | void *buf, *base; | |
1216 | size_t size, hdrsz; | |
1217 | int foreign_endian = 0; | |
1218 | int err; | |
1219 | ||
1220 | libctf_init_debug(); | |
1221 | ||
1222 | if (ctfsect == NULL || ((symsect == NULL) != (strsect == NULL))) | |
1223 | return (ctf_set_open_errno (errp, EINVAL)); | |
1224 | ||
1225 | if (symsect != NULL && symsect->cts_entsize != sizeof (Elf32_Sym) && | |
1226 | symsect->cts_entsize != sizeof (Elf64_Sym)) | |
1227 | return (ctf_set_open_errno (errp, ECTF_SYMTAB)); | |
1228 | ||
1229 | if (symsect != NULL && symsect->cts_data == NULL) | |
1230 | return (ctf_set_open_errno (errp, ECTF_SYMBAD)); | |
1231 | ||
1232 | if (strsect != NULL && strsect->cts_data == NULL) | |
1233 | return (ctf_set_open_errno (errp, ECTF_STRBAD)); | |
1234 | ||
1235 | if (ctfsect->cts_size < sizeof (ctf_preamble_t)) | |
1236 | return (ctf_set_open_errno (errp, ECTF_NOCTFBUF)); | |
1237 | ||
1238 | pp = (const ctf_preamble_t *) ctfsect->cts_data; | |
1239 | ||
1240 | ctf_dprintf ("ctf_bufopen: magic=0x%x version=%u\n", | |
1241 | pp->ctp_magic, pp->ctp_version); | |
1242 | ||
1243 | /* Validate each part of the CTF header. | |
1244 | ||
1245 | First, we validate the preamble (common to all versions). At that point, | |
1246 | we know the endianness and specific header version, and can validate the | |
1247 | version-specific parts including section offsets and alignments. | |
1248 | ||
1249 | We specifically do not support foreign-endian old versions. */ | |
1250 | ||
1251 | if (_libctf_unlikely_ (pp->ctp_magic != CTF_MAGIC)) | |
1252 | { | |
1253 | if (pp->ctp_magic == bswap_16 (CTF_MAGIC)) | |
1254 | { | |
1255 | if (pp->ctp_version != CTF_VERSION_3) | |
1256 | return (ctf_set_open_errno (errp, ECTF_CTFVERS)); | |
1257 | foreign_endian = 1; | |
1258 | } | |
1259 | else | |
1260 | return (ctf_set_open_errno (errp, ECTF_NOCTFBUF)); | |
1261 | } | |
1262 | ||
1263 | if (_libctf_unlikely_ ((pp->ctp_version < CTF_VERSION_1) | |
1264 | || (pp->ctp_version > CTF_VERSION_3))) | |
1265 | return (ctf_set_open_errno (errp, ECTF_CTFVERS)); | |
1266 | ||
1267 | if ((symsect != NULL) && (pp->ctp_version < CTF_VERSION_2)) | |
1268 | { | |
1269 | /* The symtab can contain function entries which contain embedded ctf | |
1270 | info. We do not support dynamically upgrading such entries (none | |
1271 | should exist in any case, since dwarf2ctf does not create them). */ | |
1272 | ||
1273 | ctf_dprintf ("ctf_bufopen: CTF version %d symsect not " | |
1274 | "supported\n", pp->ctp_version); | |
1275 | return (ctf_set_open_errno (errp, ECTF_NOTSUP)); | |
1276 | } | |
1277 | ||
1278 | if (ctfsect->cts_size < sizeof (ctf_header_t)) | |
1279 | return (ctf_set_open_errno (errp, ECTF_NOCTFBUF)); | |
1280 | ||
1281 | memcpy (&hp, ctfsect->cts_data, sizeof (hp)); | |
1282 | ||
1283 | if (foreign_endian) | |
1284 | flip_header (&hp); | |
1285 | ||
1286 | hdrsz = sizeof (ctf_header_t); | |
1287 | ||
1288 | size = hp.cth_stroff + hp.cth_strlen; | |
1289 | ||
1290 | ctf_dprintf ("ctf_bufopen: uncompressed size=%lu\n", (unsigned long) size); | |
1291 | ||
1292 | if (hp.cth_lbloff > size || hp.cth_objtoff > size | |
1293 | || hp.cth_funcoff > size || hp.cth_typeoff > size || hp.cth_stroff > size) | |
1294 | return (ctf_set_open_errno (errp, ECTF_CORRUPT)); | |
1295 | ||
1296 | if (hp.cth_lbloff > hp.cth_objtoff | |
1297 | || hp.cth_objtoff > hp.cth_funcoff | |
1298 | || hp.cth_funcoff > hp.cth_typeoff | |
1299 | || hp.cth_funcoff > hp.cth_varoff | |
1300 | || hp.cth_varoff > hp.cth_typeoff || hp.cth_typeoff > hp.cth_stroff) | |
1301 | return (ctf_set_open_errno (errp, ECTF_CORRUPT)); | |
1302 | ||
1303 | if ((hp.cth_lbloff & 3) || (hp.cth_objtoff & 1) | |
1304 | || (hp.cth_funcoff & 1) || (hp.cth_varoff & 3) || (hp.cth_typeoff & 3)) | |
1305 | return (ctf_set_open_errno (errp, ECTF_CORRUPT)); | |
1306 | ||
1307 | /* Once everything is determined to be valid, attempt to decompress the CTF | |
1308 | data buffer if it is compressed, or copy it into new storage if it is not | |
1309 | compressed but needs endian-flipping. Otherwise we just put the data | |
1310 | section's buffer pointer into ctf_buf, below. */ | |
1311 | ||
1312 | /* Note: if this is a v1 buffer, it will be reallocated and expanded by | |
1313 | init_types(). */ | |
1314 | ||
1315 | if (hp.cth_flags & CTF_F_COMPRESS) | |
1316 | { | |
a0486bac JM |
1317 | size_t srclen; |
1318 | uLongf dstlen; | |
72f33921 NA |
1319 | const void *src; |
1320 | int rc = Z_OK; | |
1321 | ||
1322 | if ((base = ctf_data_alloc (size + hdrsz)) == NULL) | |
1323 | return (ctf_set_open_errno (errp, ECTF_ZALLOC)); | |
1324 | ||
1325 | memcpy (base, ctfsect->cts_data, hdrsz); | |
1326 | ((ctf_preamble_t *) base)->ctp_flags &= ~CTF_F_COMPRESS; | |
1327 | buf = (unsigned char *) base + hdrsz; | |
1328 | ||
1329 | src = (unsigned char *) ctfsect->cts_data + hdrsz; | |
1330 | srclen = ctfsect->cts_size - hdrsz; | |
1331 | dstlen = size; | |
1332 | ||
1333 | if ((rc = uncompress (buf, &dstlen, src, srclen)) != Z_OK) | |
1334 | { | |
1335 | ctf_dprintf ("zlib inflate err: %s\n", zError (rc)); | |
1336 | ctf_data_free (base, size + hdrsz); | |
1337 | return (ctf_set_open_errno (errp, ECTF_DECOMPRESS)); | |
1338 | } | |
1339 | ||
a0486bac | 1340 | if ((size_t) dstlen != size) |
72f33921 NA |
1341 | { |
1342 | ctf_dprintf ("zlib inflate short -- got %lu of %lu " | |
1343 | "bytes\n", (unsigned long) dstlen, (unsigned long) size); | |
1344 | ctf_data_free (base, size + hdrsz); | |
1345 | return (ctf_set_open_errno (errp, ECTF_CORRUPT)); | |
1346 | } | |
1347 | ||
1348 | } | |
1349 | else if (foreign_endian) | |
1350 | { | |
1351 | if ((base = ctf_data_alloc (size + hdrsz)) == NULL) | |
1352 | return (ctf_set_open_errno (errp, ECTF_ZALLOC)); | |
1353 | } | |
1354 | else | |
1355 | { | |
1356 | base = (void *) ctfsect->cts_data; | |
1357 | buf = (unsigned char *) base + hdrsz; | |
1358 | } | |
1359 | ||
1360 | /* Once we have uncompressed and validated the CTF data buffer, we can | |
1361 | proceed with allocating a ctf_file_t and initializing it. | |
1362 | ||
1363 | Nothing that depends on buf or base should be set directly in this function | |
1364 | before the init_types() call, because it may be reallocated during | |
1365 | transparent upgrade if this recension of libctf is so configured: see | |
1366 | ctf_set_base() and ctf_realloc_base(). */ | |
1367 | ||
1368 | if ((fp = ctf_alloc (sizeof (ctf_file_t))) == NULL) | |
1369 | return (ctf_set_open_errno (errp, ENOMEM)); | |
1370 | ||
1371 | memset (fp, 0, sizeof (ctf_file_t)); | |
1372 | ctf_set_version (fp, &hp, hp.cth_version); | |
1373 | ||
1374 | if (_libctf_unlikely_ (hp.cth_version < CTF_VERSION_2)) | |
1375 | fp->ctf_parmax = CTF_MAX_PTYPE_V1; | |
1376 | else | |
1377 | fp->ctf_parmax = CTF_MAX_PTYPE; | |
1378 | ||
1379 | memcpy (&fp->ctf_data, ctfsect, sizeof (ctf_sect_t)); | |
1380 | ||
1381 | if (symsect != NULL) | |
1382 | { | |
1383 | memcpy (&fp->ctf_symtab, symsect, sizeof (ctf_sect_t)); | |
1384 | memcpy (&fp->ctf_strtab, strsect, sizeof (ctf_sect_t)); | |
1385 | } | |
1386 | ||
1387 | if (fp->ctf_data.cts_name != NULL) | |
1388 | fp->ctf_data.cts_name = ctf_strdup (fp->ctf_data.cts_name); | |
1389 | if (fp->ctf_symtab.cts_name != NULL) | |
1390 | fp->ctf_symtab.cts_name = ctf_strdup (fp->ctf_symtab.cts_name); | |
1391 | if (fp->ctf_strtab.cts_name != NULL) | |
1392 | fp->ctf_strtab.cts_name = ctf_strdup (fp->ctf_strtab.cts_name); | |
1393 | ||
1394 | if (fp->ctf_data.cts_name == NULL) | |
1395 | fp->ctf_data.cts_name = _CTF_NULLSTR; | |
1396 | if (fp->ctf_symtab.cts_name == NULL) | |
1397 | fp->ctf_symtab.cts_name = _CTF_NULLSTR; | |
1398 | if (fp->ctf_strtab.cts_name == NULL) | |
1399 | fp->ctf_strtab.cts_name = _CTF_NULLSTR; | |
1400 | ||
1401 | if (strsect != NULL) | |
1402 | { | |
1403 | fp->ctf_str[CTF_STRTAB_1].cts_strs = strsect->cts_data; | |
1404 | fp->ctf_str[CTF_STRTAB_1].cts_len = strsect->cts_size; | |
1405 | } | |
1406 | ||
1407 | if (foreign_endian && | |
1408 | (err = flip_ctf (&hp, base)) != 0) | |
1409 | { | |
1410 | /* We can be certain that flip_ctf() will have endian-flipped everything | |
1411 | other than the types table when we return. In particular the header | |
1412 | is fine, so set it, to allow freeing to use the usual code path. */ | |
1413 | ||
1414 | (void) ctf_set_open_errno (errp, err); | |
1415 | ctf_set_base (fp, &hp, base); | |
1416 | goto bad; | |
1417 | } | |
1418 | ||
1419 | ctf_set_base (fp, &hp, base); | |
1420 | fp->ctf_size = size + hdrsz; | |
1421 | ||
1422 | if ((err = init_types (fp, &hp)) != 0) | |
1423 | { | |
1424 | (void) ctf_set_open_errno (errp, err); | |
1425 | goto bad; | |
1426 | } | |
1427 | ||
1428 | /* The ctf region may have been reallocated by init_types(), but now | |
1429 | that is done, it will not move again, so we can protect it, as long | |
1430 | as it didn't come from the ctfsect, which might have been allocated | |
1431 | with malloc(). */ | |
1432 | ||
1433 | if (fp->ctf_base != (void *) ctfsect->cts_data) | |
1434 | ctf_data_protect ((void *) fp->ctf_base, fp->ctf_size); | |
1435 | ||
1436 | /* If we have a symbol table section, allocate and initialize | |
1437 | the symtab translation table, pointed to by ctf_sxlate. */ | |
1438 | ||
1439 | if (symsect != NULL) | |
1440 | { | |
1441 | fp->ctf_nsyms = symsect->cts_size / symsect->cts_entsize; | |
1442 | fp->ctf_sxlate = ctf_alloc (fp->ctf_nsyms * sizeof (uint32_t)); | |
1443 | ||
1444 | if (fp->ctf_sxlate == NULL) | |
1445 | { | |
1446 | (void) ctf_set_open_errno (errp, ENOMEM); | |
1447 | goto bad; | |
1448 | } | |
1449 | ||
1450 | if ((err = init_symtab (fp, &hp, symsect, strsect)) != 0) | |
1451 | { | |
1452 | (void) ctf_set_open_errno (errp, err); | |
1453 | goto bad; | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | /* Initialize the ctf_lookup_by_name top-level dictionary. We keep an | |
1458 | array of type name prefixes and the corresponding ctf_hash to use. | |
1459 | NOTE: This code must be kept in sync with the code in ctf_update(). */ | |
1460 | fp->ctf_lookups[0].ctl_prefix = "struct"; | |
1461 | fp->ctf_lookups[0].ctl_len = strlen (fp->ctf_lookups[0].ctl_prefix); | |
1462 | fp->ctf_lookups[0].ctl_hash = fp->ctf_structs; | |
1463 | fp->ctf_lookups[1].ctl_prefix = "union"; | |
1464 | fp->ctf_lookups[1].ctl_len = strlen (fp->ctf_lookups[1].ctl_prefix); | |
1465 | fp->ctf_lookups[1].ctl_hash = fp->ctf_unions; | |
1466 | fp->ctf_lookups[2].ctl_prefix = "enum"; | |
1467 | fp->ctf_lookups[2].ctl_len = strlen (fp->ctf_lookups[2].ctl_prefix); | |
1468 | fp->ctf_lookups[2].ctl_hash = fp->ctf_enums; | |
1469 | fp->ctf_lookups[3].ctl_prefix = _CTF_NULLSTR; | |
1470 | fp->ctf_lookups[3].ctl_len = strlen (fp->ctf_lookups[3].ctl_prefix); | |
1471 | fp->ctf_lookups[3].ctl_hash = fp->ctf_names; | |
1472 | fp->ctf_lookups[4].ctl_prefix = NULL; | |
1473 | fp->ctf_lookups[4].ctl_len = 0; | |
1474 | fp->ctf_lookups[4].ctl_hash = NULL; | |
1475 | ||
1476 | if (symsect != NULL) | |
1477 | { | |
1478 | if (symsect->cts_entsize == sizeof (Elf64_Sym)) | |
1479 | (void) ctf_setmodel (fp, CTF_MODEL_LP64); | |
1480 | else | |
1481 | (void) ctf_setmodel (fp, CTF_MODEL_ILP32); | |
1482 | } | |
1483 | else | |
1484 | (void) ctf_setmodel (fp, CTF_MODEL_NATIVE); | |
1485 | ||
1486 | fp->ctf_refcnt = 1; | |
1487 | return fp; | |
1488 | ||
1489 | bad: | |
1490 | ctf_file_close (fp); | |
1491 | return NULL; | |
1492 | } | |
1493 | ||
1494 | /* Close the specified CTF container and free associated data structures. Note | |
1495 | that ctf_file_close() is a reference counted operation: if the specified file | |
1496 | is the parent of other active containers, its reference count will be greater | |
1497 | than one and it will be freed later when no active children exist. */ | |
1498 | ||
1499 | void | |
1500 | ctf_file_close (ctf_file_t *fp) | |
1501 | { | |
1502 | ctf_dtdef_t *dtd, *ntd; | |
1503 | ctf_dvdef_t *dvd, *nvd; | |
1504 | ||
1505 | if (fp == NULL) | |
1506 | return; /* Allow ctf_file_close(NULL) to simplify caller code. */ | |
1507 | ||
1508 | ctf_dprintf ("ctf_file_close(%p) refcnt=%u\n", (void *) fp, fp->ctf_refcnt); | |
1509 | ||
1510 | if (fp->ctf_refcnt > 1) | |
1511 | { | |
1512 | fp->ctf_refcnt--; | |
1513 | return; | |
1514 | } | |
1515 | ||
1516 | if (fp->ctf_dynparname != NULL) | |
1517 | ctf_free (fp->ctf_dynparname); | |
1518 | ||
1519 | if (fp->ctf_parent != NULL) | |
1520 | ctf_file_close (fp->ctf_parent); | |
1521 | ||
1522 | for (dtd = ctf_list_next (&fp->ctf_dtdefs); dtd != NULL; dtd = ntd) | |
1523 | { | |
1524 | ntd = ctf_list_next (dtd); | |
1525 | ctf_dtd_delete (fp, dtd); | |
1526 | } | |
1527 | ctf_dynhash_destroy (fp->ctf_dthash); | |
1528 | ctf_dynhash_destroy (fp->ctf_dtbyname); | |
1529 | ||
1530 | for (dvd = ctf_list_next (&fp->ctf_dvdefs); dvd != NULL; dvd = nvd) | |
1531 | { | |
1532 | nvd = ctf_list_next (dvd); | |
1533 | ctf_dvd_delete (fp, dvd); | |
1534 | } | |
1535 | ctf_dynhash_destroy (fp->ctf_dvhash); | |
1536 | ||
1537 | ctf_free (fp->ctf_tmp_typeslice); | |
1538 | ||
1539 | if (fp->ctf_data.cts_name != _CTF_NULLSTR && | |
1540 | fp->ctf_data.cts_name != NULL) | |
1541 | ctf_free ((char *) fp->ctf_data.cts_name); | |
1542 | ||
1543 | if (fp->ctf_symtab.cts_name != _CTF_NULLSTR && | |
1544 | fp->ctf_symtab.cts_name != NULL) | |
1545 | ctf_free ((char *) fp->ctf_symtab.cts_name); | |
1546 | ||
1547 | if (fp->ctf_strtab.cts_name != _CTF_NULLSTR && | |
1548 | fp->ctf_strtab.cts_name != NULL) | |
1549 | ctf_free ((char *) fp->ctf_strtab.cts_name); | |
1550 | ||
1551 | else if (fp->ctf_data_mmapped) | |
1552 | ctf_munmap (fp->ctf_data_mmapped, fp->ctf_data_mmapped_len); | |
1553 | ||
1554 | ctf_free_base (fp, NULL, 0); | |
1555 | ||
1556 | if (fp->ctf_sxlate != NULL) | |
1557 | ctf_free (fp->ctf_sxlate); | |
1558 | ||
1559 | if (fp->ctf_txlate != NULL) | |
1560 | ctf_free (fp->ctf_txlate); | |
1561 | ||
1562 | if (fp->ctf_ptrtab != NULL) | |
1563 | ctf_free (fp->ctf_ptrtab); | |
1564 | ||
1565 | ctf_hash_destroy (fp->ctf_structs); | |
1566 | ctf_hash_destroy (fp->ctf_unions); | |
1567 | ctf_hash_destroy (fp->ctf_enums); | |
1568 | ctf_hash_destroy (fp->ctf_names); | |
1569 | ||
1570 | ctf_free (fp); | |
1571 | } | |
1572 | ||
143dce84 NA |
1573 | /* The converse of ctf_open(). ctf_open() disguises whatever it opens as an |
1574 | archive, so closing one is just like closing an archive. */ | |
1575 | void | |
1576 | ctf_close (ctf_archive_t *arc) | |
1577 | { | |
1578 | ctf_arc_close (arc); | |
1579 | } | |
1580 | ||
9402cc59 NA |
1581 | /* Get the CTF archive from which this ctf_file_t is derived. */ |
1582 | ctf_archive_t * | |
1583 | ctf_get_arc (const ctf_file_t *fp) | |
1584 | { | |
1585 | return fp->ctf_archive; | |
1586 | } | |
1587 | ||
72f33921 NA |
1588 | /* Return the ctfsect out of the core ctf_impl. Useful for freeing the |
1589 | ctfsect's data * after ctf_file_close(), which is why we return the actual | |
1590 | structure, not a pointer to it, since that is likely to become a pointer to | |
1591 | freed data before the return value is used under the expected use case of | |
1592 | ctf_getsect()/ ctf_file_close()/free(). */ | |
1593 | extern ctf_sect_t | |
1594 | ctf_getdatasect (const ctf_file_t *fp) | |
1595 | { | |
1596 | return fp->ctf_data; | |
1597 | } | |
1598 | ||
1599 | /* Return the CTF handle for the parent CTF container, if one exists. | |
1600 | Otherwise return NULL to indicate this container has no imported parent. */ | |
1601 | ctf_file_t * | |
1602 | ctf_parent_file (ctf_file_t *fp) | |
1603 | { | |
1604 | return fp->ctf_parent; | |
1605 | } | |
1606 | ||
1607 | /* Return the name of the parent CTF container, if one exists. Otherwise | |
1608 | return NULL to indicate this container is a root container. */ | |
1609 | const char * | |
1610 | ctf_parent_name (ctf_file_t *fp) | |
1611 | { | |
1612 | return fp->ctf_parname; | |
1613 | } | |
1614 | ||
1615 | /* Set the parent name. It is an error to call this routine without calling | |
1616 | ctf_import() at some point. */ | |
1617 | void | |
1618 | ctf_parent_name_set (ctf_file_t *fp, const char *name) | |
1619 | { | |
1620 | if (fp->ctf_dynparname != NULL) | |
1621 | ctf_free (fp->ctf_dynparname); | |
1622 | ||
1623 | fp->ctf_dynparname = ctf_strdup (name); | |
1624 | fp->ctf_parname = fp->ctf_dynparname; | |
1625 | } | |
1626 | ||
1627 | /* Import the types from the specified parent container by storing a pointer | |
1628 | to it in ctf_parent and incrementing its reference count. Only one parent | |
1629 | is allowed: if a parent already exists, it is replaced by the new parent. */ | |
1630 | int | |
1631 | ctf_import (ctf_file_t *fp, ctf_file_t *pfp) | |
1632 | { | |
1633 | if (fp == NULL || fp == pfp || (pfp != NULL && pfp->ctf_refcnt == 0)) | |
1634 | return (ctf_set_errno (fp, EINVAL)); | |
1635 | ||
1636 | if (pfp != NULL && pfp->ctf_dmodel != fp->ctf_dmodel) | |
1637 | return (ctf_set_errno (fp, ECTF_DMODEL)); | |
1638 | ||
1639 | if (fp->ctf_parent != NULL) | |
1640 | ctf_file_close (fp->ctf_parent); | |
1641 | ||
1642 | if (pfp != NULL) | |
1643 | { | |
1644 | fp->ctf_flags |= LCTF_CHILD; | |
1645 | pfp->ctf_refcnt++; | |
1646 | ||
1647 | if (fp->ctf_parname == NULL) | |
1648 | ctf_parent_name_set (fp, "PARENT"); | |
1649 | } | |
1650 | fp->ctf_parent = pfp; | |
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | /* Set the data model constant for the CTF container. */ | |
1655 | int | |
1656 | ctf_setmodel (ctf_file_t *fp, int model) | |
1657 | { | |
1658 | const ctf_dmodel_t *dp; | |
1659 | ||
1660 | for (dp = _libctf_models; dp->ctd_name != NULL; dp++) | |
1661 | { | |
1662 | if (dp->ctd_code == model) | |
1663 | { | |
1664 | fp->ctf_dmodel = dp; | |
1665 | return 0; | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | return (ctf_set_errno (fp, EINVAL)); | |
1670 | } | |
1671 | ||
1672 | /* Return the data model constant for the CTF container. */ | |
1673 | int | |
1674 | ctf_getmodel (ctf_file_t *fp) | |
1675 | { | |
1676 | return fp->ctf_dmodel->ctd_code; | |
1677 | } | |
1678 | ||
a0486bac JM |
1679 | /* The caller can hang an arbitrary pointer off each ctf_file_t using this |
1680 | function. */ | |
72f33921 NA |
1681 | void |
1682 | ctf_setspecific (ctf_file_t *fp, void *data) | |
1683 | { | |
1684 | fp->ctf_specific = data; | |
1685 | } | |
1686 | ||
a0486bac | 1687 | /* Retrieve the arbitrary pointer again. */ |
72f33921 NA |
1688 | void * |
1689 | ctf_getspecific (ctf_file_t *fp) | |
1690 | { | |
1691 | return fp->ctf_specific; | |
1692 | } |