1 /* Implementation header. 2 Copyright (C) 2019-2020 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 #ifndef _CTF_IMPL_H 21 #define _CTF_IMPL_H 22 23 #include "config.h" 24 #include <errno.h> 25 #include <sys/param.h> 26 #include "ctf-decls.h" 27 #include <ctf-api.h> 28 #include <sys/types.h> 29 #include <stdlib.h> 30 #include <stdarg.h> 31 #include <stdio.h> 32 #include <stdint.h> 33 #include <limits.h> 34 #include <ctype.h> 35 #include <elf.h> 36 #include <bfd.h> 37 38 #ifdef __cplusplus 39 extern "C" 40 { 41 #endif 42 43 /* Compiler attributes. */ 44 45 #if defined (__GNUC__) 46 47 /* GCC. We assume that all compilers claiming to be GCC support sufficiently 48 many GCC attributes that the code below works. If some non-GCC compilers 49 masquerading as GCC in fact do not implement these attributes, version checks 50 may be required. */ 51 52 /* We use the _libctf_*_ pattern to avoid clashes with any future attribute 53 macros glibc may introduce, which have names of the pattern 54 __attribute_blah__. */ 55 56 #define _libctf_printflike_(string_index,first_to_check) \ 57 __attribute__ ((__format__ (__printf__, (string_index), (first_to_check)))) 58 #define _libctf_unlikely_(x) __builtin_expect ((x), 0) 59 #define _libctf_unused_ __attribute__ ((__unused__)) 60 #define _libctf_malloc_ __attribute__((__malloc__)) 61 62 #endif 63 64 /* libctf in-memory state. */ 65 66 typedef struct ctf_fixed_hash ctf_hash_t; /* Private to ctf-hash.c. */ 67 typedef struct ctf_dynhash ctf_dynhash_t; /* Private to ctf-hash.c. */ 68 69 typedef struct ctf_strs 70 { 71 const char *cts_strs; /* Base address of string table. */ 72 size_t cts_len; /* Size of string table in bytes. */ 73 } ctf_strs_t; 74 75 typedef struct ctf_strs_writable 76 { 77 char *cts_strs; /* Base address of string table. */ 78 size_t cts_len; /* Size of string table in bytes. */ 79 } ctf_strs_writable_t; 80 81 typedef struct ctf_dmodel 82 { 83 const char *ctd_name; /* Data model name. */ 84 int ctd_code; /* Data model code. */ 85 size_t ctd_pointer; /* Size of void * in bytes. */ 86 size_t ctd_char; /* Size of char in bytes. */ 87 size_t ctd_short; /* Size of short in bytes. */ 88 size_t ctd_int; /* Size of int in bytes. */ 89 size_t ctd_long; /* Size of long in bytes. */ 90 } ctf_dmodel_t; 91 92 typedef struct ctf_names 93 { 94 ctf_hash_t *ctn_readonly; /* Hash table when readonly. */ 95 ctf_dynhash_t *ctn_writable; /* Hash table when writable. */ 96 } ctf_names_t; 97 98 typedef struct ctf_lookup 99 { 100 const char *ctl_prefix; /* String prefix for this lookup. */ 101 size_t ctl_len; /* Length of prefix string in bytes. */ 102 ctf_names_t *ctl_hash; /* Pointer to hash table for lookup. */ 103 } ctf_lookup_t; 104 105 typedef struct ctf_fileops 106 { 107 uint32_t (*ctfo_get_kind) (uint32_t); 108 uint32_t (*ctfo_get_root) (uint32_t); 109 uint32_t (*ctfo_get_vlen) (uint32_t); 110 ssize_t (*ctfo_get_ctt_size) (const ctf_file_t *, const ctf_type_t *, 111 ssize_t *, ssize_t *); 112 ssize_t (*ctfo_get_vbytes) (unsigned short, ssize_t, size_t); 113 } ctf_fileops_t; 114 115 typedef struct ctf_list 116 { 117 struct ctf_list *l_prev; /* Previous pointer or tail pointer. */ 118 struct ctf_list *l_next; /* Next pointer or head pointer. */ 119 } ctf_list_t; 120 121 typedef enum 122 { 123 CTF_PREC_BASE, 124 CTF_PREC_POINTER, 125 CTF_PREC_ARRAY, 126 CTF_PREC_FUNCTION, 127 CTF_PREC_MAX 128 } ctf_decl_prec_t; 129 130 typedef struct ctf_decl_node 131 { 132 ctf_list_t cd_list; /* Linked list pointers. */ 133 ctf_id_t cd_type; /* Type identifier. */ 134 uint32_t cd_kind; /* Type kind. */ 135 uint32_t cd_n; /* Type dimension if array. */ 136 } ctf_decl_node_t; 137 138 typedef struct ctf_decl 139 { 140 ctf_list_t cd_nodes[CTF_PREC_MAX]; /* Declaration node stacks. */ 141 int cd_order[CTF_PREC_MAX]; /* Storage order of decls. */ 142 ctf_decl_prec_t cd_qualp; /* Qualifier precision. */ 143 ctf_decl_prec_t cd_ordp; /* Ordered precision. */ 144 char *cd_buf; /* Buffer for output. */ 145 int cd_err; /* Saved error value. */ 146 int cd_enomem; /* Nonzero if OOM during printing. */ 147 } ctf_decl_t; 148 149 typedef struct ctf_dmdef 150 { 151 ctf_list_t dmd_list; /* List forward/back pointers. */ 152 char *dmd_name; /* Name of this member. */ 153 ctf_id_t dmd_type; /* Type of this member (for sou). */ 154 unsigned long dmd_offset; /* Offset of this member in bits (for sou). */ 155 int dmd_value; /* Value of this member (for enum). */ 156 } ctf_dmdef_t; 157 158 typedef struct ctf_dtdef 159 { 160 ctf_list_t dtd_list; /* List forward/back pointers. */ 161 ctf_id_t dtd_type; /* Type identifier for this definition. */ 162 ctf_type_t dtd_data; /* Type node, including name. */ 163 union 164 { 165 ctf_list_t dtu_members; /* struct, union, or enum */ 166 ctf_arinfo_t dtu_arr; /* array */ 167 ctf_encoding_t dtu_enc; /* integer or float */ 168 ctf_id_t *dtu_argv; /* function */ 169 ctf_slice_t dtu_slice; /* slice */ 170 } dtd_u; 171 } ctf_dtdef_t; 172 173 typedef struct ctf_dvdef 174 { 175 ctf_list_t dvd_list; /* List forward/back pointers. */ 176 char *dvd_name; /* Name associated with variable. */ 177 ctf_id_t dvd_type; /* Type of variable. */ 178 unsigned long dvd_snapshots; /* Snapshot count when inserted. */ 179 } ctf_dvdef_t; 180 181 typedef struct ctf_bundle 182 { 183 ctf_file_t *ctb_file; /* CTF container handle. */ 184 ctf_id_t ctb_type; /* CTF type identifier. */ 185 ctf_dtdef_t *ctb_dtd; /* CTF dynamic type definition (if any). */ 186 } ctf_bundle_t; 187 188 /* Atoms associate strings with a list of the CTF items that reference that 189 string, so that ctf_update() can instantiate all the strings using the 190 ctf_str_atoms and then reassociate them with the real string later. 191 192 Strings can be interned into ctf_str_atom without having refs associated 193 with them, for values that are returned to callers, etc. Items are only 194 removed from this table on ctf_close(), but on every ctf_update(), all the 195 csa_refs in all entries are purged. */ 196 197 typedef struct ctf_str_atom 198 { 199 const char *csa_str; /* Backpointer to string (hash key). */ 200 ctf_list_t csa_refs; /* This string's refs. */ 201 uint32_t csa_offset; /* Strtab offset, if any. */ 202 uint32_t csa_external_offset; /* External strtab offset, if any. */ 203 unsigned long csa_snapshot_id; /* Snapshot ID at time of creation. */ 204 } ctf_str_atom_t; 205 206 /* The refs of a single string in the atoms table. */ 207 208 typedef struct ctf_str_atom_ref 209 { 210 ctf_list_t caf_list; /* List forward/back pointers. */ 211 uint32_t *caf_ref; /* A single ref to this string. */ 212 } ctf_str_atom_ref_t; 213 214 /* The structure used as the key in a ctf_link_type_mapping, which lets the 215 linker machinery determine which type IDs on the input side of a link map to 216 which types on the output side. (The value is a ctf_id_t: another 217 index, not a type.) */ 218 219 typedef struct ctf_link_type_mapping_key 220 { 221 ctf_file_t *cltm_fp; 222 ctf_id_t cltm_idx; 223 } ctf_link_type_mapping_key_t; 224 225 /* The ctf_file is the structure used to represent a CTF container to library 226 clients, who see it only as an opaque pointer. Modifications can therefore 227 be made freely to this structure without regard to client versioning. The 228 ctf_file_t typedef appears in <ctf-api.h> and declares a forward tag. 229 230 NOTE: ctf_update() requires that everything inside of ctf_file either be an 231 immediate value, a pointer to dynamically allocated data *outside* of the 232 ctf_file itself, or a pointer to statically allocated data. If you add a 233 pointer to ctf_file that points to something within the ctf_file itself, 234 you must make corresponding changes to ctf_update(). */ 235 236 struct ctf_file 237 { 238 const ctf_fileops_t *ctf_fileops; /* Version-specific file operations. */ 239 struct ctf_header *ctf_header; /* The header from this CTF file. */ 240 unsigned char ctf_openflags; /* Flags the file had when opened. */ 241 ctf_sect_t ctf_data; /* CTF data from object file. */ 242 ctf_sect_t ctf_symtab; /* Symbol table from object file. */ 243 ctf_sect_t ctf_strtab; /* String table from object file. */ 244 ctf_dynhash_t *ctf_prov_strtab; /* Maps provisional-strtab offsets 245 to names. */ 246 ctf_dynhash_t *ctf_syn_ext_strtab; /* Maps ext-strtab offsets to names. */ 247 void *ctf_data_mmapped; /* CTF data we mmapped, to free later. */ 248 size_t ctf_data_mmapped_len; /* Length of CTF data we mmapped. */ 249 ctf_names_t ctf_structs; /* Hash table of struct types. */ 250 ctf_names_t ctf_unions; /* Hash table of union types. */ 251 ctf_names_t ctf_enums; /* Hash table of enum types. */ 252 ctf_names_t ctf_names; /* Hash table of remaining type names. */ 253 ctf_lookup_t ctf_lookups[5]; /* Pointers to nametabs for name lookup. */ 254 ctf_strs_t ctf_str[2]; /* Array of string table base and bounds. */ 255 ctf_dynhash_t *ctf_str_atoms; /* Hash table of ctf_str_atoms_t. */ 256 uint64_t ctf_str_num_refs; /* Number of refs to cts_str_atoms. */ 257 uint32_t ctf_str_prov_offset; /* Latest provisional offset assigned so far. */ 258 unsigned char *ctf_base; /* CTF file pointer. */ 259 unsigned char *ctf_dynbase; /* Freeable CTF file pointer. */ 260 unsigned char *ctf_buf; /* Uncompressed CTF data buffer. */ 261 size_t ctf_size; /* Size of CTF header + uncompressed data. */ 262 uint32_t *ctf_sxlate; /* Translation table for symtab entries. */ 263 unsigned long ctf_nsyms; /* Number of entries in symtab xlate table. */ 264 uint32_t *ctf_txlate; /* Translation table for type IDs. */ 265 uint32_t *ctf_ptrtab; /* Translation table for pointer-to lookups. */ 266 size_t ctf_ptrtab_len; /* Num types storable in ptrtab currently. */ 267 struct ctf_varent *ctf_vars; /* Sorted variable->type mapping. */ 268 unsigned long ctf_nvars; /* Number of variables in ctf_vars. */ 269 unsigned long ctf_typemax; /* Maximum valid type ID number. */ 270 const ctf_dmodel_t *ctf_dmodel; /* Data model pointer (see above). */ 271 const char *ctf_cuname; /* Compilation unit name (if any). */ 272 char *ctf_dyncuname; /* Dynamically allocated name of CU. */ 273 struct ctf_file *ctf_parent; /* Parent CTF container (if any). */ 274 const char *ctf_parlabel; /* Label in parent container (if any). */ 275 const char *ctf_parname; /* Basename of parent (if any). */ 276 char *ctf_dynparname; /* Dynamically allocated name of parent. */ 277 uint32_t ctf_parmax; /* Highest type ID of a parent type. */ 278 uint32_t ctf_refcnt; /* Reference count (for parent links). */ 279 uint32_t ctf_flags; /* Libctf flags (see below). */ 280 int ctf_errno; /* Error code for most recent error. */ 281 int ctf_version; /* CTF data version. */ 282 ctf_dynhash_t *ctf_dthash; /* Hash of dynamic type definitions. */ 283 ctf_list_t ctf_dtdefs; /* List of dynamic type definitions. */ 284 ctf_dynhash_t *ctf_dvhash; /* Hash of dynamic variable mappings. */ 285 ctf_list_t ctf_dvdefs; /* List of dynamic variable definitions. */ 286 unsigned long ctf_dtoldid; /* Oldest id that has been committed. */ 287 unsigned long ctf_snapshots; /* ctf_snapshot() plus ctf_update() count. */ 288 unsigned long ctf_snapshot_lu; /* ctf_snapshot() call count at last update. */ 289 ctf_archive_t *ctf_archive; /* Archive this ctf_file_t came from. */ 290 ctf_dynhash_t *ctf_link_inputs; /* Inputs to this link. */ 291 ctf_dynhash_t *ctf_link_outputs; /* Additional outputs from this link. */ 292 ctf_dynhash_t *ctf_link_type_mapping; /* Map input types to output types. */ 293 ctf_dynhash_t *ctf_link_cu_mapping; /* Map CU names to CTF dict names. */ 294 /* Allow the caller to Change the name of link archive members. */ 295 ctf_link_memb_name_changer_f *ctf_link_memb_name_changer; 296 void *ctf_link_memb_name_changer_arg; /* Argument for it. */ 297 ctf_dynhash_t *ctf_add_processing; /* Types ctf_add_type is working on now. */ 298 char *ctf_tmp_typeslice; /* Storage for slicing up type names. */ 299 size_t ctf_tmp_typeslicelen; /* Size of the typeslice. */ 300 void *ctf_specific; /* Data for ctf_get/setspecific(). */ 301 }; 302 303 /* An abstraction over both a ctf_file_t and a ctf_archive_t. */ 304 305 struct ctf_archive_internal 306 { 307 int ctfi_is_archive; 308 ctf_file_t *ctfi_file; 309 struct ctf_archive *ctfi_archive; 310 ctf_sect_t ctfi_symsect; 311 ctf_sect_t ctfi_strsect; 312 void *ctfi_data; 313 bfd *ctfi_abfd; /* Optional source of section data. */ 314 void (*ctfi_bfd_close) (struct ctf_archive_internal *); 315 }; 316 317 /* Return x rounded up to an alignment boundary. 318 eg, P2ROUNDUP(0x1234, 0x100) == 0x1300 (0x13*align) 319 eg, P2ROUNDUP(0x5600, 0x100) == 0x5600 (0x56*align) */ 320 #define P2ROUNDUP(x, align) (-(-(x) & -(align))) 321 322 /* * If an offs is not aligned already then round it up and align it. */ 323 #define LCTF_ALIGN_OFFS(offs, align) ((offs + (align - 1)) & ~(align - 1)) 324 325 #define LCTF_TYPE_ISPARENT(fp, id) ((id) <= fp->ctf_parmax) 326 #define LCTF_TYPE_ISCHILD(fp, id) ((id) > fp->ctf_parmax) 327 #define LCTF_TYPE_TO_INDEX(fp, id) ((id) & (fp->ctf_parmax)) 328 #define LCTF_INDEX_TO_TYPE(fp, id, child) (child ? ((id) | (fp->ctf_parmax+1)) : \ 329 (id)) 330 331 #define LCTF_INDEX_TO_TYPEPTR(fp, i) \ 332 ((fp->ctf_flags & LCTF_RDWR) ? \ 333 &(ctf_dtd_lookup (fp, LCTF_INDEX_TO_TYPE \ 334 (fp, i, fp->ctf_flags & LCTF_CHILD))->dtd_data) : \ 335 (ctf_type_t *)((uintptr_t)(fp)->ctf_buf + (fp)->ctf_txlate[(i)])) 336 337 #define LCTF_INFO_KIND(fp, info) ((fp)->ctf_fileops->ctfo_get_kind(info)) 338 #define LCTF_INFO_ISROOT(fp, info) ((fp)->ctf_fileops->ctfo_get_root(info)) 339 #define LCTF_INFO_VLEN(fp, info) ((fp)->ctf_fileops->ctfo_get_vlen(info)) 340 #define LCTF_VBYTES(fp, kind, size, vlen) \ 341 ((fp)->ctf_fileops->ctfo_get_vbytes(kind, size, vlen)) 342 343 static inline ssize_t ctf_get_ctt_size (const ctf_file_t *fp, 344 const ctf_type_t *tp, 345 ssize_t *sizep, 346 ssize_t *incrementp) 347 { 348 return (fp->ctf_fileops->ctfo_get_ctt_size (fp, tp, sizep, incrementp)); 349 } 350 351 #define LCTF_CHILD 0x0001 /* CTF container is a child */ 352 #define LCTF_RDWR 0x0002 /* CTF container is writable */ 353 #define LCTF_DIRTY 0x0004 /* CTF container has been modified */ 354 355 extern ctf_names_t *ctf_name_table (ctf_file_t *, int); 356 extern const ctf_type_t *ctf_lookup_by_id (ctf_file_t **, ctf_id_t); 357 extern ctf_id_t ctf_lookup_by_rawname (ctf_file_t *, int, const char *); 358 extern ctf_id_t ctf_lookup_by_rawhash (ctf_file_t *, ctf_names_t *, const char *); 359 extern void ctf_set_ctl_hashes (ctf_file_t *); 360 361 typedef unsigned int (*ctf_hash_fun) (const void *ptr); 362 extern unsigned int ctf_hash_integer (const void *ptr); 363 extern unsigned int ctf_hash_string (const void *ptr); 364 extern unsigned int ctf_hash_type_mapping_key (const void *ptr); 365 366 typedef int (*ctf_hash_eq_fun) (const void *, const void *); 367 extern int ctf_hash_eq_integer (const void *, const void *); 368 extern int ctf_hash_eq_string (const void *, const void *); 369 extern int ctf_hash_eq_type_mapping_key (const void *, const void *); 370 371 typedef void (*ctf_hash_free_fun) (void *); 372 373 typedef void (*ctf_hash_iter_f) (void *key, void *value, void *arg); 374 typedef int (*ctf_hash_iter_remove_f) (void *key, void *value, void *arg); 375 376 extern ctf_hash_t *ctf_hash_create (unsigned long, ctf_hash_fun, ctf_hash_eq_fun); 377 extern int ctf_hash_insert_type (ctf_hash_t *, ctf_file_t *, uint32_t, uint32_t); 378 extern int ctf_hash_define_type (ctf_hash_t *, ctf_file_t *, uint32_t, uint32_t); 379 extern ctf_id_t ctf_hash_lookup_type (ctf_hash_t *, ctf_file_t *, const char *); 380 extern uint32_t ctf_hash_size (const ctf_hash_t *); 381 extern void ctf_hash_destroy (ctf_hash_t *); 382 383 extern ctf_dynhash_t *ctf_dynhash_create (ctf_hash_fun, ctf_hash_eq_fun, 384 ctf_hash_free_fun, ctf_hash_free_fun); 385 extern int ctf_dynhash_insert (ctf_dynhash_t *, void *, void *); 386 extern void ctf_dynhash_remove (ctf_dynhash_t *, const void *); 387 extern void ctf_dynhash_empty (ctf_dynhash_t *); 388 extern void *ctf_dynhash_lookup (ctf_dynhash_t *, const void *); 389 extern void ctf_dynhash_destroy (ctf_dynhash_t *); 390 extern void ctf_dynhash_iter (ctf_dynhash_t *, ctf_hash_iter_f, void *); 391 extern void ctf_dynhash_iter_remove (ctf_dynhash_t *, ctf_hash_iter_remove_f, 392 void *); 393 394 #define ctf_list_prev(elem) ((void *)(((ctf_list_t *)(elem))->l_prev)) 395 #define ctf_list_next(elem) ((void *)(((ctf_list_t *)(elem))->l_next)) 396 397 extern void ctf_list_append (ctf_list_t *, void *); 398 extern void ctf_list_prepend (ctf_list_t *, void *); 399 extern void ctf_list_delete (ctf_list_t *, void *); 400 extern int ctf_list_empty_p (ctf_list_t *lp); 401 402 extern int ctf_dtd_insert (ctf_file_t *, ctf_dtdef_t *, int); 403 extern void ctf_dtd_delete (ctf_file_t *, ctf_dtdef_t *); 404 extern ctf_dtdef_t *ctf_dtd_lookup (const ctf_file_t *, ctf_id_t); 405 extern ctf_dtdef_t *ctf_dynamic_type (const ctf_file_t *, ctf_id_t); 406 407 extern int ctf_dvd_insert (ctf_file_t *, ctf_dvdef_t *); 408 extern void ctf_dvd_delete (ctf_file_t *, ctf_dvdef_t *); 409 extern ctf_dvdef_t *ctf_dvd_lookup (const ctf_file_t *, const char *); 410 411 extern void ctf_add_type_mapping (ctf_file_t *src_fp, ctf_id_t src_type, 412 ctf_file_t *dst_fp, ctf_id_t dst_type); 413 extern ctf_id_t ctf_type_mapping (ctf_file_t *src_fp, ctf_id_t src_type, 414 ctf_file_t **dst_fp); 415 416 extern void ctf_decl_init (ctf_decl_t *); 417 extern void ctf_decl_fini (ctf_decl_t *); 418 extern void ctf_decl_push (ctf_decl_t *, ctf_file_t *, ctf_id_t); 419 420 _libctf_printflike_ (2, 3) 421 extern void ctf_decl_sprintf (ctf_decl_t *, const char *, ...); 422 extern char *ctf_decl_buf (ctf_decl_t *cd); 423 424 extern const char *ctf_strptr (ctf_file_t *, uint32_t); 425 extern const char *ctf_strraw (ctf_file_t *, uint32_t); 426 extern const char *ctf_strraw_explicit (ctf_file_t *, uint32_t, 427 ctf_strs_t *); 428 extern int ctf_str_create_atoms (ctf_file_t *); 429 extern void ctf_str_free_atoms (ctf_file_t *); 430 extern uint32_t ctf_str_add (ctf_file_t *, const char *); 431 extern uint32_t ctf_str_add_ref (ctf_file_t *, const char *, uint32_t *ref); 432 extern int ctf_str_add_external (ctf_file_t *, const char *, uint32_t offset); 433 extern void ctf_str_remove_ref (ctf_file_t *, const char *, uint32_t *ref); 434 extern void ctf_str_rollback (ctf_file_t *, ctf_snapshot_id_t); 435 extern void ctf_str_purge_refs (ctf_file_t *); 436 extern ctf_strs_writable_t ctf_str_write_strtab (ctf_file_t *); 437 438 extern struct ctf_archive *ctf_arc_open_internal (const char *, int *); 439 extern struct ctf_archive *ctf_arc_bufopen (const void *, size_t, int *); 440 extern void ctf_arc_close_internal (struct ctf_archive *); 441 extern void *ctf_set_open_errno (int *, int); 442 extern unsigned long ctf_set_errno (ctf_file_t *, int); 443 444 extern ctf_file_t *ctf_simple_open_internal (const char *, size_t, const char *, 445 size_t, size_t, 446 const char *, size_t, 447 ctf_dynhash_t *, int, int *); 448 extern ctf_file_t *ctf_bufopen_internal (const ctf_sect_t *, const ctf_sect_t *, 449 const ctf_sect_t *, ctf_dynhash_t *, 450 int, int *); 451 extern int ctf_serialize (ctf_file_t *); 452 453 _libctf_malloc_ 454 extern void *ctf_mmap (size_t length, size_t offset, int fd); 455 extern void ctf_munmap (void *, size_t); 456 extern ssize_t ctf_pread (int fd, void *buf, ssize_t count, off_t offset); 457 458 extern void *ctf_realloc (ctf_file_t *, void *, size_t); 459 extern char *ctf_str_append (char *, const char *); 460 extern char *ctf_str_append_noerr (char *, const char *); 461 extern const char *ctf_strerror (int); 462 463 extern ctf_id_t ctf_type_resolve_unsliced (ctf_file_t *, ctf_id_t); 464 extern int ctf_type_kind_unsliced (ctf_file_t *, ctf_id_t); 465 466 _libctf_printflike_ (1, 2) 467 extern void ctf_dprintf (const char *, ...); 468 extern void libctf_init_debug (void); 469 470 extern Elf64_Sym *ctf_sym_to_elf64 (const Elf32_Sym *src, Elf64_Sym *dst); 471 extern const char *ctf_lookup_symbol_name (ctf_file_t *fp, unsigned long symidx); 472 473 /* Variables, all underscore-prepended. */ 474 475 extern const char _CTF_SECTION[]; /* name of CTF ELF section */ 476 extern const char _CTF_NULLSTR[]; /* empty string */ 477 478 extern int _libctf_version; /* library client version */ 479 extern int _libctf_debug; /* debugging messages enabled */ 480 481 #ifdef __cplusplus 482 } 483 #endif 484 485 #endif /* _CTF_IMPL_H */ 486