include/ctf-api.h

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