1 /* Public API to libctf.
2 Copyright (C) 2019 Free Software Foundation, Inc.
4 This file is part of libctf.
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
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.
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/>. */
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). */
27 #include <sys/param.h>
28 #include <sys/types.h>
37 /* Clients can open one or more CTF containers and obtain a pointer to an
38 opaque ctf_file_t. Types are identified by an opaque ctf_id_t token.
39 They can also open or create read-only archives of CTF containers in a
42 These opaque definitions allow libctf to evolve without breaking clients. */
44 typedef struct ctf_file ctf_file_t
;
45 typedef struct ctf_archive_internal ctf_archive_t
;
46 typedef long ctf_id_t
;
48 /* If the debugger needs to provide the CTF library with a set of raw buffers
49 for use as the CTF data, symbol table, and string table, it can do so by
50 filling in ctf_sect_t structures and passing them to ctf_bufopen().
52 The contents of this structure must always be in native endianness (no
53 byteswapping is performed). */
55 typedef struct ctf_sect
57 const char *cts_name
; /* Section name (if any). */
58 unsigned long cts_type
; /* Section type (ELF SHT_... value). */
59 unsigned long cts_flags
; /* Section flags (ELF SHF_... value). */
60 const void *cts_data
; /* Pointer to section data. */
61 size_t cts_size
; /* Size of data in bytes. */
62 size_t cts_entsize
; /* Size of each section entry (symtab only). */
63 off64_t cts_offset
; /* File offset of this section (if any). */
66 /* Symbolic names for CTF sections. */
68 typedef enum ctf_sect_names
79 /* Encoding information for integers, floating-point values, and certain other
80 intrinsics can be obtained by calling ctf_type_encoding(), below. The flags
81 field will contain values appropriate for the type defined in <ctf.h>. */
83 typedef struct ctf_encoding
85 uint32_t cte_format
; /* Data format (CTF_INT_* or CTF_FP_* flags). */
86 uint32_t cte_offset
; /* Offset of value in bits. */
87 uint32_t cte_bits
; /* Size of storage in bits. */
90 typedef struct ctf_membinfo
92 ctf_id_t ctm_type
; /* Type of struct or union member. */
93 unsigned long ctm_offset
; /* Offset of member in bits. */
96 typedef struct ctf_arinfo
98 ctf_id_t ctr_contents
; /* Type of array contents. */
99 ctf_id_t ctr_index
; /* Type of array index. */
100 uint32_t ctr_nelems
; /* Number of elements. */
103 typedef struct ctf_funcinfo
105 ctf_id_t ctc_return
; /* Function return type. */
106 uint32_t ctc_argc
; /* Number of typed arguments to function. */
107 uint32_t ctc_flags
; /* Function attributes (see below). */
110 typedef struct ctf_lblinfo
112 ctf_id_t ctb_type
; /* Last type associated with the label. */
115 typedef struct ctf_snapshot_id
117 unsigned long dtd_id
; /* Highest DTD ID at time of snapshot. */
118 unsigned long snapshot_id
; /* Snapshot id at time of snapshot. */
121 #define CTF_FUNC_VARARG 0x1 /* Function arguments end with varargs. */
123 /* Functions that return integer status or a ctf_id_t use the following value
124 to indicate failure. ctf_errno() can be used to obtain an error code. */
125 #define CTF_ERR (-1L)
127 #define ECTF_BASE 1000 /* Base value for libctf errnos. */
132 ECTF_FMT
= ECTF_BASE
, /* File is not in CTF or ELF format. */
133 ECTF_BFDERR
, /* BFD error. */
134 ECTF_CTFVERS
, /* CTF version is more recent than libctf. */
135 ECTF_BFD_AMBIGUOUS
, /* Ambiguous BFD target. */
136 ECTF_SYMTAB
, /* Symbol table uses invalid entry size. */
137 ECTF_SYMBAD
, /* Symbol table data buffer invalid. */
138 ECTF_STRBAD
, /* String table data buffer invalid. */
139 ECTF_CORRUPT
, /* File data corruption detected. */
140 ECTF_NOCTFDATA
, /* ELF file does not contain CTF data. */
141 ECTF_NOCTFBUF
, /* Buffer does not contain CTF data. */
142 ECTF_NOSYMTAB
, /* Symbol table data is not available. */
143 ECTF_NOPARENT
, /* Parent CTF container is not available. */
144 ECTF_DMODEL
, /* Data model mismatch. */
145 ECTF_UNUSED
, /* Unused error. */
146 ECTF_ZALLOC
, /* Failed to allocate (de)compression buffer. */
147 ECTF_DECOMPRESS
, /* Failed to decompress CTF data. */
148 ECTF_STRTAB
, /* String table for this string is missing. */
149 ECTF_BADNAME
, /* String offset is corrupt w.r.t. strtab. */
150 ECTF_BADID
, /* Invalid type ID number. */
151 ECTF_NOTSOU
, /* Type is not a struct or union. */
152 ECTF_NOTENUM
, /* Type is not an enum. */
153 ECTF_NOTSUE
, /* Type is not a struct, union, or enum. */
154 ECTF_NOTINTFP
, /* Type is not an integer, float, or enum. */
155 ECTF_NOTARRAY
, /* Type is not an array. */
156 ECTF_NOTREF
, /* Type does not reference another type. */
157 ECTF_NAMELEN
, /* Buffer is too small to hold type name. */
158 ECTF_NOTYPE
, /* No type found corresponding to name. */
159 ECTF_SYNTAX
, /* Syntax error in type name. */
160 ECTF_NOTFUNC
, /* Symtab entry does not refer to a function. */
161 ECTF_NOFUNCDAT
, /* No func info available for function. */
162 ECTF_NOTDATA
, /* Symtab entry does not refer to a data obj. */
163 ECTF_NOTYPEDAT
, /* No type info available for object. */
164 ECTF_NOLABEL
, /* No label found corresponding to name. */
165 ECTF_NOLABELDATA
, /* File does not contain any labels. */
166 ECTF_NOTSUP
, /* Feature not supported. */
167 ECTF_NOENUMNAM
, /* Enum element name not found. */
168 ECTF_NOMEMBNAM
, /* Member name not found. */
169 ECTF_RDONLY
, /* CTF container is read-only. */
170 ECTF_DTFULL
, /* CTF type is full (no more members allowed). */
171 ECTF_FULL
, /* CTF container is full. */
172 ECTF_DUPLICATE
, /* Duplicate member or variable name. */
173 ECTF_CONFLICT
, /* Conflicting type definition present. */
174 ECTF_OVERROLLBACK
, /* Attempt to roll back past a ctf_update. */
175 ECTF_COMPRESS
, /* Failed to compress CTF data. */
176 ECTF_ARCREATE
, /* Error creating CTF archive. */
177 ECTF_ARNNAME
, /* Name not found in CTF archive. */
178 ECTF_SLICEOVERFLOW
, /* Overflow of type bitness or offset in slice. */
179 ECTF_DUMPSECTUNKNOWN
, /* Unknown section number in dump. */
180 ECTF_DUMPSECTCHANGED
/* Section changed in middle of dump. */
183 /* The CTF data model is inferred to be the caller's data model or the data
184 model of the given object, unless ctf_setmodel() is explicitly called. */
185 #define CTF_MODEL_ILP32 1 /* Object data model is ILP32. */
186 #define CTF_MODEL_LP64 2 /* Object data model is LP64. */
188 # define CTF_MODEL_NATIVE CTF_MODEL_LP64
190 # define CTF_MODEL_NATIVE CTF_MODEL_ILP32
193 /* Dynamic CTF containers can be created using ctf_create(). The ctf_add_*
194 routines can be used to add new definitions to the dynamic container.
195 New types are labeled as root or non-root to determine whether they are
196 visible at the top-level program scope when subsequently doing a lookup. */
198 #define CTF_ADD_NONROOT 0 /* Type only visible in nested scope. */
199 #define CTF_ADD_ROOT 1 /* Type visible at top-level scope. */
201 /* These typedefs are used to define the signature for callback functions
202 that can be used with the iteration and visit functions below. */
204 typedef int ctf_archive_member_f (ctf_file_t
*fp
, const char *name
, void *arg
);
205 typedef int ctf_archive_raw_member_f (const char *name
, const void *content
,
206 size_t len
, void *arg
);
208 extern ctf_sect_t
ctf_getdatasect (const ctf_file_t
*);
209 extern ctf_archive_t
*ctf_get_arc (const ctf_file_t
*);
210 extern void ctf_arc_close (ctf_archive_t
*);
211 extern ctf_file_t
*ctf_arc_open_by_name (const ctf_archive_t
*,
212 const char *, int *);
213 extern ctf_file_t
*ctf_arc_open_by_name_sections (const ctf_archive_t
*,
216 const char *, int *);
218 /* The next functions return or close real CTF files, or write out CTF archives,
219 not opaque containers around either. */
221 extern ctf_file_t
*ctf_simple_open (const char *, size_t, const char *, size_t,
222 size_t, const char *, size_t, int *);
223 extern ctf_file_t
*ctf_bufopen (const ctf_sect_t
*, const ctf_sect_t
*,
224 const ctf_sect_t
*, int *);
225 extern void ctf_file_close (ctf_file_t
*);
227 extern int ctf_arc_write (const char *, ctf_file_t
**, size_t,
228 const char **, size_t);
230 extern ctf_file_t
*ctf_parent_file (ctf_file_t
*);
231 extern const char *ctf_parent_name (ctf_file_t
*);
232 extern void ctf_parent_name_set (ctf_file_t
*, const char *);
234 extern int ctf_import (ctf_file_t
*, ctf_file_t
*);
235 extern int ctf_setmodel (ctf_file_t
*, int);
236 extern int ctf_getmodel (ctf_file_t
*);
238 extern void ctf_setspecific (ctf_file_t
*, void *);
239 extern void *ctf_getspecific (ctf_file_t
*);
241 extern int ctf_errno (ctf_file_t
*);
242 extern const char *ctf_errmsg (int);
243 extern int ctf_archive_iter (const ctf_archive_t
*, ctf_archive_member_f
*,
245 /* This function alone does not currently operate on CTF files masquerading
246 as archives, and returns -EINVAL: the raw data is no longer available. It is
247 expected to be used only by archiving tools, in any case, which have no need
248 to deal with non-archives at all. */
249 extern int ctf_archive_raw_iter (const ctf_archive_t
*,
250 ctf_archive_raw_member_f
*, void *);
251 extern ctf_id_t
ctf_add_array (ctf_file_t
*, uint32_t,
252 const ctf_arinfo_t
*);
253 extern ctf_id_t
ctf_add_const (ctf_file_t
*, uint32_t, ctf_id_t
);
254 extern ctf_id_t
ctf_add_enum_encoded (ctf_file_t
*, uint32_t, const char *,
255 const ctf_encoding_t
*);
256 extern ctf_id_t
ctf_add_enum (ctf_file_t
*, uint32_t, const char *);
257 extern ctf_id_t
ctf_add_float (ctf_file_t
*, uint32_t,
258 const char *, const ctf_encoding_t
*);
259 extern ctf_id_t
ctf_add_forward (ctf_file_t
*, uint32_t, const char *,
261 extern ctf_id_t
ctf_add_function (ctf_file_t
*, uint32_t,
262 const ctf_funcinfo_t
*, const ctf_id_t
*);
263 extern ctf_id_t
ctf_add_integer (ctf_file_t
*, uint32_t, const char *,
264 const ctf_encoding_t
*);
265 extern ctf_id_t
ctf_add_slice (ctf_file_t
*, uint32_t, ctf_id_t
, const ctf_encoding_t
*);
266 extern ctf_id_t
ctf_add_pointer (ctf_file_t
*, uint32_t, ctf_id_t
);
267 extern ctf_id_t
ctf_add_type (ctf_file_t
*, ctf_file_t
*, ctf_id_t
);
268 extern ctf_id_t
ctf_add_typedef (ctf_file_t
*, uint32_t, const char *,
270 extern ctf_id_t
ctf_add_restrict (ctf_file_t
*, uint32_t, ctf_id_t
);
271 extern ctf_id_t
ctf_add_struct (ctf_file_t
*, uint32_t, const char *);
272 extern ctf_id_t
ctf_add_union (ctf_file_t
*, uint32_t, const char *);
273 extern ctf_id_t
ctf_add_struct_sized (ctf_file_t
*, uint32_t, const char *,
275 extern ctf_id_t
ctf_add_union_sized (ctf_file_t
*, uint32_t, const char *,
277 extern ctf_id_t
ctf_add_volatile (ctf_file_t
*, uint32_t, ctf_id_t
);
279 extern int ctf_add_enumerator (ctf_file_t
*, ctf_id_t
, const char *, int);
280 extern int ctf_add_member (ctf_file_t
*, ctf_id_t
, const char *, ctf_id_t
);
281 extern int ctf_add_member_offset (ctf_file_t
*, ctf_id_t
, const char *,
282 ctf_id_t
, unsigned long);
283 extern int ctf_add_member_encoded (ctf_file_t
*, ctf_id_t
, const char *,
284 ctf_id_t
, unsigned long,
285 const ctf_encoding_t
);
287 extern int ctf_add_variable (ctf_file_t
*, const char *, ctf_id_t
);
289 extern int ctf_set_array (ctf_file_t
*, ctf_id_t
, const ctf_arinfo_t
*);
291 extern ctf_file_t
*ctf_create (int *);
292 extern int ctf_update (ctf_file_t
*);
293 extern ctf_snapshot_id_t
ctf_snapshot (ctf_file_t
*);
294 extern int ctf_rollback (ctf_file_t
*, ctf_snapshot_id_t
);
295 extern int ctf_discard (ctf_file_t
*);
296 extern int ctf_write (ctf_file_t
*, int);
297 extern int ctf_gzwrite (ctf_file_t
* fp
, gzFile fd
);
298 extern int ctf_compress_write (ctf_file_t
* fp
, int fd
);
300 extern void ctf_setdebug (int debug
);
301 extern int ctf_getdebug (void);
307 #endif /* _CTF_API_H */