include/ctf-api.h

   1 /* Public API to libctf.
   2    Copyright (C) 2019-2021 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 /* This header file defines the interfaces available from the CTF debugger
  21    library, libctf.  This API can be used by a debugger to operate on data in
  22    the Compact ANSI-C Type Format (CTF).  */
  23
  24 #ifndef _CTF_API_H
  25 #define _CTF_API_H
  26
  27 #include <sys/types.h>
  28 #include <ctf.h>
  29 #include <zlib.h>
  30
  31 #ifdef  __cplusplus
  32 extern "C"
  33 {
  34 #endif
  35
  36 /* Clients can open one or more CTF containers and obtain a pointer to an
  37    opaque ctf_dict_t.  Types are identified by an opaque ctf_id_t token.
  38    They can also open or create read-only archives of CTF containers in a
  39    ctf_archive_t.
  40
  41    These opaque definitions allow libctf to evolve without breaking clients.  */
  42
  43 typedef struct ctf_dict ctf_dict_t;
  44 typedef struct ctf_archive_internal ctf_archive_t;
  45 typedef unsigned long ctf_id_t;
  46
  47 /* This opaque definition allows libctf to accept BFD data structures without
  48    importing all the BFD noise into users' namespaces.  */
  49
  50 struct bfd;
  51
  52 /* If the debugger needs to provide the CTF library with a set of raw buffers
  53    for use as the CTF data, symbol table, and string table, it can do so by
  54    filling in ctf_sect_t structures and passing them to ctf_bufopen.
  55
  56    The contents of this structure must always be in native endianness.  At read
  57    time, the symbol table endianness is derived from the BFD target (if BFD is
  58    in use): if a BFD target is not in use, please call ctf_symsect_endianness or
  59    ctf_arc_symsect_endianness.  */
  60
  61 typedef struct ctf_sect
  62 {
  63   const char *cts_name;           /* Section name (if any).  */
  64   const void *cts_data;           /* Pointer to section data.  */
  65   size_t cts_size;                /* Size of data in bytes.  */
  66   size_t cts_entsize;             /* Size of each section entry (symtab only).  */
  67 } ctf_sect_t;
  68
  69 /* A minimal symbol extracted from a linker's internal symbol table
  70    representation.  The symbol name can be given either via st_name or via a
  71    strtab offset in st_nameidx, which corresponds to one of the string offsets
  72    communicated via the ctf_link_add_strtab callback.   */
  73
  74 typedef struct ctf_link_sym
  75 {
  76   /* The st_name and st_nameidx will not be accessed outside the call to
  77      ctf_link_shuffle_syms.  If you set st_nameidx to offset zero, make sure
  78      to set st_nameidx_set as well.  */
  79
  80   const char *st_name;
  81   size_t st_nameidx;
  82   int st_nameidx_set;
  83   uint32_t st_symidx;
  84   uint32_t st_shndx;
  85   uint32_t st_type;
  86   uint32_t st_value;
  87 } ctf_link_sym_t;
  88
  89 /* Flags applying to this specific link.  */
  90
  91 /* Share all types that are not in conflict.  The default.  */
  92 #define CTF_LINK_SHARE_UNCONFLICTED 0x0
  93
  94 /* Share only types that are used by multiple inputs.  */
  95 #define CTF_LINK_SHARE_DUPLICATED 0x1
  96
  97 /* Do a nondeduplicating link.  */
  98 #define CTF_LINK_NONDEDUP 0x2
  99
 100 /* Create empty outputs for all registered CU mappings even if no types are
 101    emitted into them.  */
 102 #define CTF_LINK_EMPTY_CU_MAPPINGS 0x4
 103
 104 /* Omit the content of the variables section.  */
 105 #define CTF_LINK_OMIT_VARIABLES_SECTION 0x8
 106
 107 /* If *unset*, filter out entries corresponding to linker-reported symbols
 108    from the variable section, and filter out all entries with no linker-reported
 109    symbols from the data object and function info sections: if set, do no
 110    filtering and leave all entries in place.  (This is a negative-sense flag
 111    because it is rare to want symbols the linker has not reported as present to
 112    stick around in the symtypetab sections nonetheless: relocatable links are
 113    the only likely case.)  */
 114 #define CTF_LINK_NO_FILTER_REPORTED_SYMS 0x10
 115
 116 /* Symbolic names for CTF sections.  */
 117
 118 typedef enum ctf_sect_names
 119   {
 120    CTF_SECT_HEADER,
 121    CTF_SECT_LABEL,
 122    CTF_SECT_OBJT,
 123    CTF_SECT_OBJTIDX = CTF_SECT_OBJT,
 124    CTF_SECT_FUNC,
 125    CTF_SECT_FUNCIDX = CTF_SECT_FUNC,
 126    CTF_SECT_VAR,
 127    CTF_SECT_TYPE,
 128    CTF_SECT_STR
 129   } ctf_sect_names_t;
 130
 131 /* Encoding information for integers, floating-point values, and certain other
 132    intrinsics can be obtained by calling ctf_type_encoding, below.  The flags
 133    field will contain values appropriate for the type defined in <ctf.h>.  */
 134
 135 typedef struct ctf_encoding
 136 {
 137   uint32_t cte_format;           /* Data format (CTF_INT_* or CTF_FP_* flags).  */
 138   uint32_t cte_offset;           /* Offset of value in bits.  */
 139   uint32_t cte_bits;             /* Size of storage in bits.  */
 140 } ctf_encoding_t;
 141
 142 typedef struct ctf_membinfo
 143 {
 144   ctf_id_t ctm_type;            /* Type of struct or union member.  */
 145   unsigned long ctm_offset;     /* Offset of member in bits.  */
 146 } ctf_membinfo_t;
 147
 148 typedef struct ctf_arinfo
 149 {
 150   ctf_id_t ctr_contents;        /* Type of array contents.  */
 151   ctf_id_t ctr_index;           /* Type of array index.  */
 152   uint32_t ctr_nelems;          /* Number of elements.  */
 153 } ctf_arinfo_t;
 154
 155 typedef struct ctf_funcinfo
 156 {
 157   ctf_id_t ctc_return;          /* Function return type.  */
 158   uint32_t ctc_argc;            /* Number of typed arguments to function.  */
 159   uint32_t ctc_flags;           /* Function attributes (see below).  */
 160 } ctf_funcinfo_t;
 161
 162 typedef struct ctf_lblinfo
 163 {
 164   ctf_id_t ctb_type;            /* Last type associated with the label.  */
 165 } ctf_lblinfo_t;
 166
 167 typedef struct ctf_snapshot_id
 168 {
 169   unsigned long dtd_id;         /* Highest DTD ID at time of snapshot.  */
 170   unsigned long snapshot_id;    /* Snapshot id at time of snapshot.  */
 171 } ctf_snapshot_id_t;
 172
 173 #define CTF_FUNC_VARARG 0x1     /* Function arguments end with varargs.  */
 174
 175 /* Functions that return a ctf_id_t use the following value to indicate failure.
 176    ctf_errno can be used to obtain an error code.  Functions that return
 177    a straight integral -1 also use ctf_errno.  */
 178 #define CTF_ERR ((ctf_id_t) -1L)
 179
 180 /* This macro holds information about all the available ctf errors.
 181    It is used to form both an enum holding all the error constants,
 182    and also the error strings themselves.  To use, define _CTF_FIRST
 183    and _CTF_ITEM to expand as you like, then mention the macro name.
 184    See the enum after this for an example.  */
 185 #define _CTF_ERRORS \
 186   _CTF_FIRST (ECTF_FMT, "File is not in CTF or ELF format.")    \
 187   _CTF_ITEM (ECTF_BFDERR, "BFD error.")                         \
 188   _CTF_ITEM (ECTF_CTFVERS, "CTF dict version is too new for libctf.") \
 189   _CTF_ITEM (ECTF_BFD_AMBIGUOUS, "Ambiguous BFD target.")       \
 190   _CTF_ITEM (ECTF_SYMTAB, "Symbol table uses invalid entry size.") \
 191   _CTF_ITEM (ECTF_SYMBAD, "Symbol table data buffer is not valid.") \
 192   _CTF_ITEM (ECTF_STRBAD, "String table data buffer is not valid.") \
 193   _CTF_ITEM (ECTF_CORRUPT, "File data structure corruption detected.") \
 194   _CTF_ITEM (ECTF_NOCTFDATA, "File does not contain CTF data.") \
 195   _CTF_ITEM (ECTF_NOCTFBUF, "Buffer does not contain CTF data.") \
 196   _CTF_ITEM (ECTF_NOSYMTAB, "Symbol table information is not available.") \
 197   _CTF_ITEM (ECTF_NOPARENT, "The parent CTF dictionary is unavailable.") \
 198   _CTF_ITEM (ECTF_DMODEL, "Data model mismatch.") \
 199   _CTF_ITEM (ECTF_LINKADDEDLATE, "File added to link too late.") \
 200   _CTF_ITEM (ECTF_ZALLOC, "Failed to allocate (de)compression buffer.") \
 201   _CTF_ITEM (ECTF_DECOMPRESS, "Failed to decompress CTF data.") \
 202   _CTF_ITEM (ECTF_STRTAB, "External string table is not available.") \
 203   _CTF_ITEM (ECTF_BADNAME, "String name offset is corrupt.") \
 204   _CTF_ITEM (ECTF_BADID, "Invalid type identifier.") \
 205   _CTF_ITEM (ECTF_NOTSOU, "Type is not a struct or union.") \
 206   _CTF_ITEM (ECTF_NOTENUM, "Type is not an enum.") \
 207   _CTF_ITEM (ECTF_NOTSUE, "Type is not a struct, union, or enum.") \
 208   _CTF_ITEM (ECTF_NOTINTFP, "Type is not an integer, float, or enum.") \
 209   _CTF_ITEM (ECTF_NOTARRAY, "Type is not an array.") \
 210   _CTF_ITEM (ECTF_NOTREF, "Type does not reference another type.") \
 211   _CTF_ITEM (ECTF_NAMELEN, "Buffer is too small to hold type name.") \
 212   _CTF_ITEM (ECTF_NOTYPE, "No type found corresponding to name.") \
 213   _CTF_ITEM (ECTF_SYNTAX, "Syntax error in type name.") \
 214   _CTF_ITEM (ECTF_NOTFUNC, "Symbol table entry or type is not a function.") \
 215   _CTF_ITEM (ECTF_NOFUNCDAT, "No function information available for function.") \
 216   _CTF_ITEM (ECTF_NOTDATA, "Symbol table entry does not refer to a data object.") \
 217   _CTF_ITEM (ECTF_NOTYPEDAT, "No type information available for symbol.") \
 218   _CTF_ITEM (ECTF_NOLABEL, "No label found corresponding to name.") \
 219   _CTF_ITEM (ECTF_NOLABELDATA, "File does not contain any labels.") \
 220   _CTF_ITEM (ECTF_NOTSUP, "Feature not supported.") \
 221   _CTF_ITEM (ECTF_NOENUMNAM, "Enum element name not found.") \
 222   _CTF_ITEM (ECTF_NOMEMBNAM, "Member name not found.") \
 223   _CTF_ITEM (ECTF_RDONLY, "CTF container is read-only.") \
 224   _CTF_ITEM (ECTF_DTFULL, "CTF type is full (no more members allowed).") \
 225   _CTF_ITEM (ECTF_FULL, "CTF container is full.") \
 226   _CTF_ITEM (ECTF_DUPLICATE, "Duplicate member or variable name.") \
 227   _CTF_ITEM (ECTF_CONFLICT, "Conflicting type is already defined.") \
 228   _CTF_ITEM (ECTF_OVERROLLBACK, "Attempt to roll back past a ctf_update.") \
 229   _CTF_ITEM (ECTF_COMPRESS, "Failed to compress CTF data.") \
 230   _CTF_ITEM (ECTF_ARCREATE, "Error creating CTF archive.") \
 231   _CTF_ITEM (ECTF_ARNNAME, "Name not found in CTF archive.") \
 232   _CTF_ITEM (ECTF_SLICEOVERFLOW, "Overflow of type bitness or offset in slice.") \
 233   _CTF_ITEM (ECTF_DUMPSECTUNKNOWN, "Unknown section number in dump.") \
 234   _CTF_ITEM (ECTF_DUMPSECTCHANGED, "Section changed in middle of dump.") \
 235   _CTF_ITEM (ECTF_NOTYET, "Feature not yet implemented.") \
 236   _CTF_ITEM (ECTF_INTERNAL, "Internal error: assertion failure.") \
 237   _CTF_ITEM (ECTF_NONREPRESENTABLE, "Type not representable in CTF.") \
 238   _CTF_ITEM (ECTF_NEXT_END, "End of iteration.") \
 239   _CTF_ITEM (ECTF_NEXT_WRONGFUN, "Wrong iteration function called.") \
 240   _CTF_ITEM (ECTF_NEXT_WRONGFP, "Iteration entity changed in mid-iterate.") \
 241   _CTF_ITEM (ECTF_FLAGS, "CTF header contains flags unknown to libctf.") \
 242   _CTF_ITEM (ECTF_NEEDSBFD, "This feature needs a libctf with BFD support.") \
 243   _CTF_ITEM (ECTF_INCOMPLETE, "Type is not a complete type.") \
 244   _CTF_ITEM (ECTF_NONAME, "Type name must not be empty.")
 245
 246 #define ECTF_BASE       1000    /* Base value for libctf errnos.  */
 247
 248 enum
 249   {
 250 #define _CTF_FIRST(NAME, STR) NAME = ECTF_BASE
 251 #define _CTF_ITEM(NAME, STR) , NAME
 252 _CTF_ERRORS
 253 #undef _CTF_ITEM
 254 #undef _CTF_FIRST
 255   };
 256
 257 #define ECTF_NERR (ECTF_NONAME - ECTF_BASE + 1) /* Count of CTF errors.  */
 258
 259 /* The CTF data model is inferred to be the caller's data model or the data
 260    model of the given object, unless ctf_setmodel is explicitly called.  */
 261 #define CTF_MODEL_ILP32 1       /* Object data model is ILP32.  */
 262 #define CTF_MODEL_LP64  2       /* Object data model is LP64.  */
 263 #ifdef _LP64
 264 # define CTF_MODEL_NATIVE CTF_MODEL_LP64
 265 #else
 266 # define CTF_MODEL_NATIVE CTF_MODEL_ILP32
 267 #endif
 268
 269 /* Dynamic CTF containers can be created using ctf_create.  The ctf_add_*
 270    routines can be used to add new definitions to the dynamic container.
 271    New types are labeled as root or non-root to determine whether they are
 272    visible at the top-level program scope when subsequently doing a lookup.  */
 273
 274 #define CTF_ADD_NONROOT 0       /* Type only visible in nested scope.  */
 275 #define CTF_ADD_ROOT    1       /* Type visible at top-level scope.  */
 276
 277 /* Flags for ctf_member_next.  */
 278
 279 #define CTF_MN_RECURSE 0x1      /* Recurse into unnamed members.  */
 280
 281 /* These typedefs are used to define the signature for callback functions that
 282    can be used with the iteration and visit functions below.  There is also a
 283    family of iteration functions that do not require callbacks.  */
 284
 285 typedef int ctf_visit_f (const char *name, ctf_id_t type, unsigned long offset,
 286                          int depth, void *arg);
 287 typedef int ctf_member_f (const char *name, ctf_id_t membtype,
 288                           unsigned long offset, void *arg);
 289 typedef int ctf_enum_f (const char *name, int val, void *arg);
 290 typedef int ctf_variable_f (const char *name, ctf_id_t type, void *arg);
 291 typedef int ctf_type_f (ctf_id_t type, void *arg);
 292 typedef int ctf_type_all_f (ctf_id_t type, int flag, void *arg);
 293 typedef int ctf_label_f (const char *name, const ctf_lblinfo_t *info,
 294                          void *arg);
 295 typedef int ctf_archive_member_f (ctf_dict_t *fp, const char *name, void *arg);
 296 typedef int ctf_archive_raw_member_f (const char *name, const void *content,
 297                                       size_t len, void *arg);
 298 typedef char *ctf_dump_decorate_f (ctf_sect_names_t sect,
 299                                    char *line, void *arg);
 300
 301 typedef struct ctf_dump_state ctf_dump_state_t;
 302
 303 /* Iteration state for the _next functions, and allocators/copiers/freers for
 304    it.  (None of these are needed for the simple case of iterating to the end:
 305    the _next function allocate and free the iterators for you.)  */
 306
 307 typedef struct ctf_next ctf_next_t;
 308 extern ctf_next_t *ctf_next_create (void);
 309 extern void ctf_next_destroy (ctf_next_t *);
 310 extern ctf_next_t *ctf_next_copy (ctf_next_t *);
 311
 312 /* Opening.  These mostly return an abstraction over both CTF files and CTF
 313    archives: so they can be used to open both.  CTF files will appear to be an
 314    archive with one member named '.ctf'.  The low-level functions
 315    ctf_simple_open and ctf_bufopen return ctf_dict_t's directly, and cannot
 316    be used on CTF archives.  */
 317
 318 extern ctf_archive_t *ctf_bfdopen (struct bfd *, int *);
 319 extern ctf_archive_t *ctf_bfdopen_ctfsect (struct bfd *, const ctf_sect_t *,
 320                                            int *);
 321 extern ctf_archive_t *ctf_fdopen (int fd, const char *filename,
 322                                   const char *target, int *errp);
 323 extern ctf_archive_t *ctf_open (const char *filename,
 324                                 const char *target, int *errp);
 325 extern void ctf_close (ctf_archive_t *);
 326 extern ctf_sect_t ctf_getdatasect (const ctf_dict_t *);
 327 extern ctf_sect_t ctf_getsymsect (const ctf_dict_t *);
 328 extern ctf_sect_t ctf_getstrsect (const ctf_dict_t *);
 329 extern void ctf_symsect_endianness (ctf_dict_t *, int little_endian);
 330 extern ctf_archive_t *ctf_get_arc (const ctf_dict_t *);
 331 extern ctf_archive_t *ctf_arc_open (const char *, int *);
 332 extern ctf_archive_t *ctf_arc_bufopen (const ctf_sect_t *,
 333                                        const ctf_sect_t *,
 334                                        const ctf_sect_t *,
 335                                        int *);
 336 extern void ctf_arc_symsect_endianness (ctf_archive_t *, int little_endian);
 337 extern void ctf_arc_close (ctf_archive_t *);
 338 extern ctf_dict_t *ctf_arc_lookup_symbol (ctf_archive_t *,
 339                                           unsigned long symidx,
 340                                           ctf_id_t *, int *errp);
 341 extern void ctf_arc_flush_caches (ctf_archive_t *);
 342 extern ctf_dict_t *ctf_dict_open (const ctf_archive_t *,
 343                                   const char *, int *);
 344 extern ctf_dict_t *ctf_dict_open_sections (const ctf_archive_t *,
 345                                            const ctf_sect_t *,
 346                                            const ctf_sect_t *,
 347                                            const char *, int *);
 348 extern size_t ctf_archive_count (const ctf_archive_t *);
 349
 350 /* The next functions return or close real CTF files, or write out CTF archives,
 351    not opaque containers around either.  */
 352
 353 extern ctf_dict_t *ctf_simple_open (const char *, size_t, const char *, size_t,
 354                                    size_t, const char *, size_t, int *);
 355 extern ctf_dict_t *ctf_bufopen (const ctf_sect_t *, const ctf_sect_t *,
 356                                 const ctf_sect_t *, int *);
 357 extern void ctf_ref (ctf_dict_t *);
 358 extern void ctf_dict_close (ctf_dict_t *);
 359
 360 extern int ctf_arc_write (const char *, ctf_dict_t **, size_t,
 361                           const char **, size_t);
 362 extern int ctf_arc_write_fd (int, ctf_dict_t **, size_t, const char **,
 363                              size_t);
 364
 365 extern const char *ctf_cuname (ctf_dict_t *);
 366 extern int ctf_cuname_set (ctf_dict_t *, const char *);
 367 extern ctf_dict_t *ctf_parent_dict (ctf_dict_t *);
 368 extern const char *ctf_parent_name (ctf_dict_t *);
 369 extern int ctf_parent_name_set (ctf_dict_t *, const char *);
 370 extern int ctf_type_isparent (ctf_dict_t *, ctf_id_t);
 371 extern int ctf_type_ischild (ctf_dict_t *, ctf_id_t);
 372
 373 extern int ctf_import (ctf_dict_t *, ctf_dict_t *);
 374 extern int ctf_setmodel (ctf_dict_t *, int);
 375 extern int ctf_getmodel (ctf_dict_t *);
 376
 377 extern void ctf_setspecific (ctf_dict_t *, void *);
 378 extern void *ctf_getspecific (ctf_dict_t *);
 379
 380 extern int ctf_errno (ctf_dict_t *);
 381 extern const char *ctf_errmsg (int);
 382 extern int ctf_version (int);
 383
 384 extern int ctf_func_info (ctf_dict_t *, unsigned long, ctf_funcinfo_t *);
 385 extern int ctf_func_args (ctf_dict_t *, unsigned long, uint32_t, ctf_id_t *);
 386 extern int ctf_func_type_info (ctf_dict_t *, ctf_id_t, ctf_funcinfo_t *);
 387 extern int ctf_func_type_args (ctf_dict_t *, ctf_id_t, uint32_t, ctf_id_t *);
 388
 389 extern ctf_id_t ctf_lookup_by_name (ctf_dict_t *, const char *);
 390 extern ctf_id_t ctf_lookup_by_symbol (ctf_dict_t *, unsigned long);
 391 extern ctf_id_t ctf_symbol_next (ctf_dict_t *, ctf_next_t **,
 392                                  const char **name, int functions);
 393 extern ctf_id_t ctf_lookup_variable (ctf_dict_t *, const char *);
 394
 395 extern ctf_id_t ctf_type_resolve (ctf_dict_t *, ctf_id_t);
 396 extern char *ctf_type_aname (ctf_dict_t *, ctf_id_t);
 397 extern char *ctf_type_aname_raw (ctf_dict_t *, ctf_id_t);
 398 extern ssize_t ctf_type_lname (ctf_dict_t *, ctf_id_t, char *, size_t);
 399 extern char *ctf_type_name (ctf_dict_t *, ctf_id_t, char *, size_t);
 400 extern const char *ctf_type_name_raw (ctf_dict_t *, ctf_id_t);
 401 extern ssize_t ctf_type_size (ctf_dict_t *, ctf_id_t);
 402 extern ssize_t ctf_type_align (ctf_dict_t *, ctf_id_t);
 403 extern int ctf_type_kind (ctf_dict_t *, ctf_id_t);
 404 extern int ctf_type_kind_forwarded (ctf_dict_t *, ctf_id_t);
 405 extern ctf_id_t ctf_type_reference (ctf_dict_t *, ctf_id_t);
 406 extern ctf_id_t ctf_type_pointer (ctf_dict_t *, ctf_id_t);
 407 extern int ctf_type_encoding (ctf_dict_t *, ctf_id_t, ctf_encoding_t *);
 408 extern int ctf_type_visit (ctf_dict_t *, ctf_id_t, ctf_visit_f *, void *);
 409 extern int ctf_type_cmp (ctf_dict_t *, ctf_id_t, ctf_dict_t *, ctf_id_t);
 410 extern int ctf_type_compat (ctf_dict_t *, ctf_id_t, ctf_dict_t *, ctf_id_t);
 411
 412 extern int ctf_member_info (ctf_dict_t *, ctf_id_t, const char *,
 413                             ctf_membinfo_t *);
 414 extern int ctf_array_info (ctf_dict_t *, ctf_id_t, ctf_arinfo_t *);
 415
 416 extern const char *ctf_enum_name (ctf_dict_t *, ctf_id_t, int);
 417 extern int ctf_enum_value (ctf_dict_t *, ctf_id_t, const char *, int *);
 418
 419 extern void ctf_label_set (ctf_dict_t *, const char *);
 420 extern const char *ctf_label_get (ctf_dict_t *);
 421
 422 extern const char *ctf_label_topmost (ctf_dict_t *);
 423 extern int ctf_label_info (ctf_dict_t *, const char *, ctf_lblinfo_t *);
 424
 425 extern int ctf_member_count (ctf_dict_t *, ctf_id_t);
 426 extern int ctf_member_iter (ctf_dict_t *, ctf_id_t, ctf_member_f *, void *);
 427 extern ssize_t ctf_member_next (ctf_dict_t *, ctf_id_t, ctf_next_t **,
 428                                 const char **name, ctf_id_t *membtype,
 429                                 int flags);
 430 extern int ctf_enum_iter (ctf_dict_t *, ctf_id_t, ctf_enum_f *, void *);
 431 extern const char *ctf_enum_next (ctf_dict_t *, ctf_id_t, ctf_next_t **,
 432                                   int *);
 433 extern int ctf_type_iter (ctf_dict_t *, ctf_type_f *, void *);
 434 extern int ctf_type_iter_all (ctf_dict_t *, ctf_type_all_f *, void *);
 435 extern ctf_id_t ctf_type_next (ctf_dict_t *, ctf_next_t **,
 436                                int *flag, int want_hidden);
 437 extern int ctf_label_iter (ctf_dict_t *, ctf_label_f *, void *);
 438 extern int ctf_label_next (ctf_dict_t *, ctf_next_t **, const char **); /* TBD */
 439 extern int ctf_variable_iter (ctf_dict_t *, ctf_variable_f *, void *);
 440 extern ctf_id_t ctf_variable_next (ctf_dict_t *, ctf_next_t **,
 441                                    const char **);
 442 extern int ctf_archive_iter (const ctf_archive_t *, ctf_archive_member_f *,
 443                              void *);
 444 extern ctf_dict_t *ctf_archive_next (const ctf_archive_t *, ctf_next_t **,
 445                                      const char **, int skip_parent, int *errp);
 446
 447 /* This function alone does not currently operate on CTF files masquerading
 448    as archives, and returns -EINVAL: the raw data is no longer available.  It is
 449    expected to be used only by archiving tools, in any case, which have no need
 450    to deal with non-archives at all.  */
 451 extern int ctf_archive_raw_iter (const ctf_archive_t *,
 452                                  ctf_archive_raw_member_f *, void *);
 453 extern char *ctf_dump (ctf_dict_t *, ctf_dump_state_t **state,
 454                        ctf_sect_names_t sect, ctf_dump_decorate_f *,
 455                        void *arg);
 456
 457 /* Error-warning reporting: an 'iterator' that returns errors and warnings from
 458    the error/warning list, in order of emission.  Errors and warnings are popped
 459    after return: the caller must free the returned error-text pointer.  */
 460 extern char *ctf_errwarning_next (ctf_dict_t *, ctf_next_t **,
 461                                   int *is_warning, int *errp);
 462
 463 extern ctf_id_t ctf_add_array (ctf_dict_t *, uint32_t,
 464                                const ctf_arinfo_t *);
 465 extern ctf_id_t ctf_add_const (ctf_dict_t *, uint32_t, ctf_id_t);
 466 extern ctf_id_t ctf_add_enum_encoded (ctf_dict_t *, uint32_t, const char *,
 467                                       const ctf_encoding_t *);
 468 extern ctf_id_t ctf_add_enum (ctf_dict_t *, uint32_t, const char *);
 469 extern ctf_id_t ctf_add_float (ctf_dict_t *, uint32_t,
 470                                const char *, const ctf_encoding_t *);
 471 extern ctf_id_t ctf_add_forward (ctf_dict_t *, uint32_t, const char *,
 472                                  uint32_t);
 473 extern ctf_id_t ctf_add_function (ctf_dict_t *, uint32_t,
 474                                   const ctf_funcinfo_t *, const ctf_id_t *);
 475 extern ctf_id_t ctf_add_integer (ctf_dict_t *, uint32_t, const char *,
 476                                  const ctf_encoding_t *);
 477 extern ctf_id_t ctf_add_slice (ctf_dict_t *, uint32_t, ctf_id_t, const ctf_encoding_t *);
 478 extern ctf_id_t ctf_add_pointer (ctf_dict_t *, uint32_t, ctf_id_t);
 479 extern ctf_id_t ctf_add_type (ctf_dict_t *, ctf_dict_t *, ctf_id_t);
 480 extern ctf_id_t ctf_add_typedef (ctf_dict_t *, uint32_t, const char *,
 481                                  ctf_id_t);
 482 extern ctf_id_t ctf_add_restrict (ctf_dict_t *, uint32_t, ctf_id_t);
 483 extern ctf_id_t ctf_add_struct (ctf_dict_t *, uint32_t, const char *);
 484 extern ctf_id_t ctf_add_union (ctf_dict_t *, uint32_t, const char *);
 485 extern ctf_id_t ctf_add_struct_sized (ctf_dict_t *, uint32_t, const char *,
 486                                       size_t);
 487 extern ctf_id_t ctf_add_union_sized (ctf_dict_t *, uint32_t, const char *,
 488                                      size_t);
 489 extern ctf_id_t ctf_add_volatile (ctf_dict_t *, uint32_t, ctf_id_t);
 490
 491 extern int ctf_add_enumerator (ctf_dict_t *, ctf_id_t, const char *, int);
 492 extern int ctf_add_member (ctf_dict_t *, ctf_id_t, const char *, ctf_id_t);
 493 extern int ctf_add_member_offset (ctf_dict_t *, ctf_id_t, const char *,
 494                                   ctf_id_t, unsigned long);
 495 extern int ctf_add_member_encoded (ctf_dict_t *, ctf_id_t, const char *,
 496                                    ctf_id_t, unsigned long,
 497                                    const ctf_encoding_t);
 498
 499 extern int ctf_add_variable (ctf_dict_t *, const char *, ctf_id_t);
 500
 501 extern int ctf_add_objt_sym (ctf_dict_t *, const char *, ctf_id_t);
 502 extern int ctf_add_func_sym (ctf_dict_t *, const char *, ctf_id_t);
 503
 504 extern int ctf_set_array (ctf_dict_t *, ctf_id_t, const ctf_arinfo_t *);
 505
 506 extern ctf_dict_t *ctf_create (int *);
 507 extern int ctf_update (ctf_dict_t *);
 508 extern ctf_snapshot_id_t ctf_snapshot (ctf_dict_t *);
 509 extern int ctf_rollback (ctf_dict_t *, ctf_snapshot_id_t);
 510 extern int ctf_discard (ctf_dict_t *);
 511 extern int ctf_write (ctf_dict_t *, int);
 512 extern int ctf_gzwrite (ctf_dict_t *fp, gzFile fd);
 513 extern int ctf_compress_write (ctf_dict_t * fp, int fd);
 514 extern unsigned char *ctf_write_mem (ctf_dict_t *, size_t *, size_t threshold);
 515
 516 extern int ctf_link_add_ctf (ctf_dict_t *, ctf_archive_t *, const char *);
 517 /* The variable filter should return nonzero if a variable should not
 518    appear in the output.  */
 519 typedef int ctf_link_variable_filter_f (ctf_dict_t *, const char *, ctf_id_t,
 520                                         void *);
 521 extern int ctf_link_set_variable_filter (ctf_dict_t *,
 522                                          ctf_link_variable_filter_f *, void *);
 523 extern int ctf_link (ctf_dict_t *, int flags);
 524 typedef const char *ctf_link_strtab_string_f (uint32_t *offset, void *arg);
 525 extern int ctf_link_add_strtab (ctf_dict_t *, ctf_link_strtab_string_f *,
 526                                 void *);
 527 extern int ctf_link_add_linker_symbol (ctf_dict_t *, ctf_link_sym_t *);
 528 extern int ctf_link_shuffle_syms (ctf_dict_t *);
 529 extern unsigned char *ctf_link_write (ctf_dict_t *, size_t *size,
 530                                       size_t threshold);
 531
 532 /* Specialist linker functions.  These functions are not used by ld, but can be
 533    used by other programs making use of the linker machinery for other purposes
 534    to customize its output.  */
 535 extern int ctf_link_add_cu_mapping (ctf_dict_t *, const char *from,
 536                                     const char *to);
 537 typedef char *ctf_link_memb_name_changer_f (ctf_dict_t *,
 538                                             const char *, void *);
 539 extern void ctf_link_set_memb_name_changer
 540   (ctf_dict_t *, ctf_link_memb_name_changer_f *, void *);
 541
 542 extern void ctf_setdebug (int debug);
 543 extern int ctf_getdebug (void);
 544
 545 /* Deprecated aliases for existing functions and types.  */
 546
 547 struct ctf_file;
 548 typedef struct ctf_dict ctf_file_t;
 549 extern void ctf_file_close (ctf_file_t *);
 550 extern ctf_dict_t *ctf_parent_file (ctf_dict_t *);
 551 extern ctf_dict_t *ctf_arc_open_by_name (const ctf_archive_t *,
 552                                          const char *, int *);
 553 extern ctf_dict_t *ctf_arc_open_by_name_sections (const ctf_archive_t *,
 554                                                   const ctf_sect_t *,
 555                                                   const ctf_sect_t *,
 556                                                   const char *, int *);
 557
 558 #ifdef  __cplusplus
 559 }
 560 #endif
 561
 562 #endif                          /* _CTF_API_H */