444 lines
19 KiB
C
444 lines
19 KiB
C
/* Public API to libctf.
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Copyright (C) 2019-2020 Free Software Foundation, Inc.
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This file is part of libctf.
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libctf is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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/* This header file defines the interfaces available from the CTF debugger
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library, libctf. This API can be used by a debugger to operate on data in
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the Compact ANSI-C Type Format (CTF). */
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#ifndef _CTF_API_H
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#define _CTF_API_H
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#include <sys/types.h>
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#include <ctf.h>
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#include <zlib.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* Clients can open one or more CTF containers and obtain a pointer to an
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opaque ctf_file_t. Types are identified by an opaque ctf_id_t token.
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They can also open or create read-only archives of CTF containers in a
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ctf_archive_t.
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These opaque definitions allow libctf to evolve without breaking clients. */
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typedef struct ctf_file ctf_file_t;
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typedef struct ctf_archive_internal ctf_archive_t;
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typedef unsigned long ctf_id_t;
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/* This opaque definition allows libctf to accept BFD data structures without
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importing all the BFD noise into users' namespaces. */
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struct bfd;
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/* If the debugger needs to provide the CTF library with a set of raw buffers
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for use as the CTF data, symbol table, and string table, it can do so by
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filling in ctf_sect_t structures and passing them to ctf_bufopen().
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The contents of this structure must always be in native endianness (no
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byteswapping is performed). */
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typedef struct ctf_sect
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{
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const char *cts_name; /* Section name (if any). */
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const void *cts_data; /* Pointer to section data. */
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size_t cts_size; /* Size of data in bytes. */
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size_t cts_entsize; /* Size of each section entry (symtab only). */
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} ctf_sect_t;
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/* A minimal symbol extracted from a linker's internal symbol table
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representation. */
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typedef struct ctf_link_sym
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{
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/* The st_name will not be accessed outside the call to
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ctf_link_shuffle_syms(). */
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const char *st_name;
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uint32_t st_shndx;
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uint32_t st_type;
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uint32_t st_value;
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} ctf_link_sym_t;
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/* Indication of how to share types when linking. */
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/* Share all types thare are not in conflict. The default. */
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#define CTF_LINK_SHARE_UNCONFLICTED 0x0
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/* Share only types that are used by multiple inputs. Not implemented yet. */
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#define CTF_LINK_SHARE_DUPLICATED 0x1
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/* Symbolic names for CTF sections. */
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typedef enum ctf_sect_names
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{
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CTF_SECT_HEADER,
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CTF_SECT_LABEL,
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CTF_SECT_OBJT,
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CTF_SECT_FUNC,
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CTF_SECT_VAR,
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CTF_SECT_TYPE,
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CTF_SECT_STR
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} ctf_sect_names_t;
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/* Encoding information for integers, floating-point values, and certain other
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intrinsics can be obtained by calling ctf_type_encoding(), below. The flags
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field will contain values appropriate for the type defined in <ctf.h>. */
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typedef struct ctf_encoding
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{
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uint32_t cte_format; /* Data format (CTF_INT_* or CTF_FP_* flags). */
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uint32_t cte_offset; /* Offset of value in bits. */
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uint32_t cte_bits; /* Size of storage in bits. */
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} ctf_encoding_t;
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typedef struct ctf_membinfo
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{
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ctf_id_t ctm_type; /* Type of struct or union member. */
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unsigned long ctm_offset; /* Offset of member in bits. */
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} ctf_membinfo_t;
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typedef struct ctf_arinfo
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{
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ctf_id_t ctr_contents; /* Type of array contents. */
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ctf_id_t ctr_index; /* Type of array index. */
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uint32_t ctr_nelems; /* Number of elements. */
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} ctf_arinfo_t;
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typedef struct ctf_funcinfo
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{
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ctf_id_t ctc_return; /* Function return type. */
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uint32_t ctc_argc; /* Number of typed arguments to function. */
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uint32_t ctc_flags; /* Function attributes (see below). */
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} ctf_funcinfo_t;
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typedef struct ctf_lblinfo
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{
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ctf_id_t ctb_type; /* Last type associated with the label. */
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} ctf_lblinfo_t;
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typedef struct ctf_snapshot_id
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{
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unsigned long dtd_id; /* Highest DTD ID at time of snapshot. */
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unsigned long snapshot_id; /* Snapshot id at time of snapshot. */
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} ctf_snapshot_id_t;
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#define CTF_FUNC_VARARG 0x1 /* Function arguments end with varargs. */
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/* Functions that return a ctf_id_t use the following value to indicate failure.
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ctf_errno() can be used to obtain an error code. Functions that return
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a straight integral -1 also use ctf_errno(). */
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#define CTF_ERR ((ctf_id_t) -1L)
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#define ECTF_BASE 1000 /* Base value for libctf errnos. */
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enum
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{
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ECTF_FMT = ECTF_BASE, /* File is not in CTF or ELF format. */
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ECTF_BFDERR, /* BFD error. */
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ECTF_CTFVERS, /* CTF version is more recent than libctf. */
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ECTF_BFD_AMBIGUOUS, /* Ambiguous BFD target. */
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ECTF_SYMTAB, /* Symbol table uses invalid entry size. */
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ECTF_SYMBAD, /* Symbol table data buffer invalid. */
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ECTF_STRBAD, /* String table data buffer invalid. */
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ECTF_CORRUPT, /* File data corruption detected. */
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ECTF_NOCTFDATA, /* ELF file does not contain CTF data. */
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ECTF_NOCTFBUF, /* Buffer does not contain CTF data. */
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ECTF_NOSYMTAB, /* Symbol table data is not available. */
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ECTF_NOPARENT, /* Parent CTF container is not available. */
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ECTF_DMODEL, /* Data model mismatch. */
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ECTF_LINKADDEDLATE, /* File added to link too late. */
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ECTF_ZALLOC, /* Failed to allocate (de)compression buffer. */
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ECTF_DECOMPRESS, /* Failed to decompress CTF data. */
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ECTF_STRTAB, /* String table for this string is missing. */
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ECTF_BADNAME, /* String offset is corrupt w.r.t. strtab. */
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ECTF_BADID, /* Invalid type ID number. */
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ECTF_NOTSOU, /* Type is not a struct or union. */
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ECTF_NOTENUM, /* Type is not an enum. */
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ECTF_NOTSUE, /* Type is not a struct, union, or enum. */
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ECTF_NOTINTFP, /* Type is not an integer, float, or enum. */
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ECTF_NOTARRAY, /* Type is not an array. */
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ECTF_NOTREF, /* Type does not reference another type. */
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ECTF_NAMELEN, /* Buffer is too small to hold type name. */
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ECTF_NOTYPE, /* No type found corresponding to name. */
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ECTF_SYNTAX, /* Syntax error in type name. */
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ECTF_NOTFUNC, /* Symbol entry or type is not a function. */
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ECTF_NOFUNCDAT, /* No func info available for function. */
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ECTF_NOTDATA, /* Symtab entry does not refer to a data obj. */
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ECTF_NOTYPEDAT, /* No type info available for object. */
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ECTF_NOLABEL, /* No label found corresponding to name. */
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ECTF_NOLABELDATA, /* File does not contain any labels. */
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ECTF_NOTSUP, /* Feature not supported. */
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ECTF_NOENUMNAM, /* Enum element name not found. */
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ECTF_NOMEMBNAM, /* Member name not found. */
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ECTF_RDONLY, /* CTF container is read-only. */
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ECTF_DTFULL, /* CTF type is full (no more members allowed). */
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ECTF_FULL, /* CTF container is full. */
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ECTF_DUPLICATE, /* Duplicate member or variable name. */
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ECTF_CONFLICT, /* Conflicting type definition present. */
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ECTF_OVERROLLBACK, /* Attempt to roll back past a ctf_update. */
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ECTF_COMPRESS, /* Failed to compress CTF data. */
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ECTF_ARCREATE, /* Error creating CTF archive. */
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ECTF_ARNNAME, /* Name not found in CTF archive. */
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ECTF_SLICEOVERFLOW, /* Overflow of type bitness or offset in slice. */
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ECTF_DUMPSECTUNKNOWN, /* Unknown section number in dump. */
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ECTF_DUMPSECTCHANGED, /* Section changed in middle of dump. */
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ECTF_NOTYET, /* Feature not yet implemented. */
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ECTF_INTERNAL, /* Internal error in link. */
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ECTF_NONREPRESENTABLE /* Type not representable in CTF. */
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};
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/* The CTF data model is inferred to be the caller's data model or the data
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model of the given object, unless ctf_setmodel() is explicitly called. */
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#define CTF_MODEL_ILP32 1 /* Object data model is ILP32. */
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#define CTF_MODEL_LP64 2 /* Object data model is LP64. */
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#ifdef _LP64
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# define CTF_MODEL_NATIVE CTF_MODEL_LP64
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#else
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# define CTF_MODEL_NATIVE CTF_MODEL_ILP32
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#endif
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/* Dynamic CTF containers can be created using ctf_create(). The ctf_add_*
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routines can be used to add new definitions to the dynamic container.
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New types are labeled as root or non-root to determine whether they are
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visible at the top-level program scope when subsequently doing a lookup. */
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#define CTF_ADD_NONROOT 0 /* Type only visible in nested scope. */
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#define CTF_ADD_ROOT 1 /* Type visible at top-level scope. */
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/* These typedefs are used to define the signature for callback functions
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that can be used with the iteration and visit functions below. */
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typedef int ctf_visit_f (const char *name, ctf_id_t type, unsigned long offset,
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int depth, void *arg);
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typedef int ctf_member_f (const char *name, ctf_id_t membtype,
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unsigned long offset, void *arg);
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typedef int ctf_enum_f (const char *name, int val, void *arg);
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typedef int ctf_variable_f (const char *name, ctf_id_t type, void *arg);
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typedef int ctf_type_f (ctf_id_t type, void *arg);
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typedef int ctf_type_all_f (ctf_id_t type, int flag, void *arg);
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typedef int ctf_label_f (const char *name, const ctf_lblinfo_t *info,
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void *arg);
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typedef int ctf_archive_member_f (ctf_file_t *fp, const char *name, void *arg);
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typedef int ctf_archive_raw_member_f (const char *name, const void *content,
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size_t len, void *arg);
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typedef char *ctf_dump_decorate_f (ctf_sect_names_t sect,
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char *line, void *arg);
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typedef struct ctf_dump_state ctf_dump_state_t;
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/* Opening. These mostly return an abstraction over both CTF files and CTF
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archives: so they can be used to open both. CTF files will appear to be an
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archive with one member named '.ctf'. The low-level functions
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ctf_simple_open() and ctf_bufopen() return ctf_file_t's directly, and cannot
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be used on CTF archives. */
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extern ctf_archive_t *ctf_bfdopen (struct bfd *, int *);
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extern ctf_archive_t *ctf_bfdopen_ctfsect (struct bfd *, const ctf_sect_t *,
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int *);
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extern ctf_archive_t *ctf_fdopen (int fd, const char *filename,
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const char *target, int *errp);
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extern ctf_archive_t *ctf_open (const char *filename,
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const char *target, int *errp);
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extern void ctf_close (ctf_archive_t *);
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extern ctf_sect_t ctf_getdatasect (const ctf_file_t *);
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extern ctf_archive_t *ctf_get_arc (const ctf_file_t *);
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extern ctf_archive_t *ctf_arc_open (const char *, int *);
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extern void ctf_arc_close (ctf_archive_t *);
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extern ctf_file_t *ctf_arc_open_by_name (const ctf_archive_t *,
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const char *, int *);
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extern ctf_file_t *ctf_arc_open_by_name_sections (const ctf_archive_t *,
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const ctf_sect_t *,
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const ctf_sect_t *,
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const char *, int *);
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/* The next functions return or close real CTF files, or write out CTF archives,
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not opaque containers around either. */
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extern ctf_file_t *ctf_simple_open (const char *, size_t, const char *, size_t,
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size_t, const char *, size_t, int *);
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extern ctf_file_t *ctf_bufopen (const ctf_sect_t *, const ctf_sect_t *,
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const ctf_sect_t *, int *);
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extern void ctf_file_close (ctf_file_t *);
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extern int ctf_arc_write (const char *, ctf_file_t **, size_t,
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const char **, size_t);
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extern int ctf_arc_write_fd (int, ctf_file_t **, size_t, const char **,
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size_t);
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extern const char *ctf_cuname (ctf_file_t *);
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extern int ctf_cuname_set (ctf_file_t *, const char *);
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extern ctf_file_t *ctf_parent_file (ctf_file_t *);
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extern const char *ctf_parent_name (ctf_file_t *);
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extern int ctf_parent_name_set (ctf_file_t *, const char *);
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extern int ctf_type_isparent (ctf_file_t *, ctf_id_t);
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extern int ctf_type_ischild (ctf_file_t *, ctf_id_t);
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extern int ctf_import (ctf_file_t *, ctf_file_t *);
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extern int ctf_setmodel (ctf_file_t *, int);
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extern int ctf_getmodel (ctf_file_t *);
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extern void ctf_setspecific (ctf_file_t *, void *);
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extern void *ctf_getspecific (ctf_file_t *);
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extern int ctf_errno (ctf_file_t *);
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extern const char *ctf_errmsg (int);
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extern int ctf_version (int);
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extern int ctf_func_info (ctf_file_t *, unsigned long, ctf_funcinfo_t *);
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extern int ctf_func_args (ctf_file_t *, unsigned long, uint32_t, ctf_id_t *);
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extern int ctf_func_type_info (ctf_file_t *, ctf_id_t, ctf_funcinfo_t *);
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extern int ctf_func_type_args (ctf_file_t *, ctf_id_t, uint32_t, ctf_id_t *);
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extern ctf_id_t ctf_lookup_by_name (ctf_file_t *, const char *);
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extern ctf_id_t ctf_lookup_by_symbol (ctf_file_t *, unsigned long);
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extern ctf_id_t ctf_lookup_variable (ctf_file_t *, const char *);
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extern ctf_id_t ctf_type_resolve (ctf_file_t *, ctf_id_t);
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extern char *ctf_type_aname (ctf_file_t *, ctf_id_t);
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extern char *ctf_type_aname_raw (ctf_file_t *, ctf_id_t);
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extern ssize_t ctf_type_lname (ctf_file_t *, ctf_id_t, char *, size_t);
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extern char *ctf_type_name (ctf_file_t *, ctf_id_t, char *, size_t);
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extern ssize_t ctf_type_size (ctf_file_t *, ctf_id_t);
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extern ssize_t ctf_type_align (ctf_file_t *, ctf_id_t);
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extern int ctf_type_kind (ctf_file_t *, ctf_id_t);
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extern ctf_id_t ctf_type_reference (ctf_file_t *, ctf_id_t);
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extern ctf_id_t ctf_type_pointer (ctf_file_t *, ctf_id_t);
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extern int ctf_type_encoding (ctf_file_t *, ctf_id_t, ctf_encoding_t *);
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extern int ctf_type_visit (ctf_file_t *, ctf_id_t, ctf_visit_f *, void *);
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extern int ctf_type_cmp (ctf_file_t *, ctf_id_t, ctf_file_t *, ctf_id_t);
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extern int ctf_type_compat (ctf_file_t *, ctf_id_t, ctf_file_t *, ctf_id_t);
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extern int ctf_member_info (ctf_file_t *, ctf_id_t, const char *,
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ctf_membinfo_t *);
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extern int ctf_array_info (ctf_file_t *, ctf_id_t, ctf_arinfo_t *);
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extern const char *ctf_enum_name (ctf_file_t *, ctf_id_t, int);
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extern int ctf_enum_value (ctf_file_t *, ctf_id_t, const char *, int *);
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extern void ctf_label_set (ctf_file_t *, const char *);
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extern const char *ctf_label_get (ctf_file_t *);
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extern const char *ctf_label_topmost (ctf_file_t *);
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extern int ctf_label_info (ctf_file_t *, const char *, ctf_lblinfo_t *);
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extern int ctf_member_iter (ctf_file_t *, ctf_id_t, ctf_member_f *, void *);
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extern int ctf_enum_iter (ctf_file_t *, ctf_id_t, ctf_enum_f *, void *);
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extern int ctf_type_iter (ctf_file_t *, ctf_type_f *, void *);
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extern int ctf_type_iter_all (ctf_file_t *, ctf_type_all_f *, void *);
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extern int ctf_label_iter (ctf_file_t *, ctf_label_f *, void *);
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extern int ctf_variable_iter (ctf_file_t *, ctf_variable_f *, void *);
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extern int ctf_archive_iter (const ctf_archive_t *, ctf_archive_member_f *,
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void *);
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/* This function alone does not currently operate on CTF files masquerading
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as archives, and returns -EINVAL: the raw data is no longer available. It is
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expected to be used only by archiving tools, in any case, which have no need
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to deal with non-archives at all. */
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extern int ctf_archive_raw_iter (const ctf_archive_t *,
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ctf_archive_raw_member_f *, void *);
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extern char *ctf_dump (ctf_file_t *, ctf_dump_state_t **state,
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ctf_sect_names_t sect, ctf_dump_decorate_f *,
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void *arg);
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extern ctf_id_t ctf_add_array (ctf_file_t *, uint32_t,
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const ctf_arinfo_t *);
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extern ctf_id_t ctf_add_const (ctf_file_t *, uint32_t, ctf_id_t);
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extern ctf_id_t ctf_add_enum_encoded (ctf_file_t *, uint32_t, const char *,
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const ctf_encoding_t *);
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extern ctf_id_t ctf_add_enum (ctf_file_t *, uint32_t, const char *);
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extern ctf_id_t ctf_add_float (ctf_file_t *, uint32_t,
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const char *, const ctf_encoding_t *);
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extern ctf_id_t ctf_add_forward (ctf_file_t *, uint32_t, const char *,
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uint32_t);
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extern ctf_id_t ctf_add_function (ctf_file_t *, uint32_t,
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const ctf_funcinfo_t *, const ctf_id_t *);
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extern ctf_id_t ctf_add_integer (ctf_file_t *, uint32_t, const char *,
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const ctf_encoding_t *);
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extern ctf_id_t ctf_add_slice (ctf_file_t *, uint32_t, ctf_id_t, const ctf_encoding_t *);
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extern ctf_id_t ctf_add_pointer (ctf_file_t *, uint32_t, ctf_id_t);
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extern ctf_id_t ctf_add_type (ctf_file_t *, ctf_file_t *, ctf_id_t);
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extern ctf_id_t ctf_add_typedef (ctf_file_t *, uint32_t, const char *,
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ctf_id_t);
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extern ctf_id_t ctf_add_restrict (ctf_file_t *, uint32_t, ctf_id_t);
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extern ctf_id_t ctf_add_struct (ctf_file_t *, uint32_t, const char *);
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extern ctf_id_t ctf_add_union (ctf_file_t *, uint32_t, const char *);
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extern ctf_id_t ctf_add_struct_sized (ctf_file_t *, uint32_t, const char *,
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size_t);
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extern ctf_id_t ctf_add_union_sized (ctf_file_t *, uint32_t, const char *,
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size_t);
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extern ctf_id_t ctf_add_volatile (ctf_file_t *, uint32_t, ctf_id_t);
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extern int ctf_add_enumerator (ctf_file_t *, ctf_id_t, const char *, int);
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extern int ctf_add_member (ctf_file_t *, ctf_id_t, const char *, ctf_id_t);
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extern int ctf_add_member_offset (ctf_file_t *, ctf_id_t, const char *,
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ctf_id_t, unsigned long);
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extern int ctf_add_member_encoded (ctf_file_t *, ctf_id_t, const char *,
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ctf_id_t, unsigned long,
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const ctf_encoding_t);
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extern int ctf_add_variable (ctf_file_t *, const char *, ctf_id_t);
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extern int ctf_set_array (ctf_file_t *, ctf_id_t, const ctf_arinfo_t *);
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extern ctf_file_t *ctf_create (int *);
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extern int ctf_update (ctf_file_t *);
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extern ctf_snapshot_id_t ctf_snapshot (ctf_file_t *);
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extern int ctf_rollback (ctf_file_t *, ctf_snapshot_id_t);
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extern int ctf_discard (ctf_file_t *);
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extern int ctf_write (ctf_file_t *, int);
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extern int ctf_gzwrite (ctf_file_t *fp, gzFile fd);
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extern int ctf_compress_write (ctf_file_t * fp, int fd);
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extern unsigned char *ctf_write_mem (ctf_file_t *, size_t *, size_t threshold);
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/* The ctf_link interfaces are not stable yet. No guarantees! */
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extern int ctf_link_add_ctf (ctf_file_t *, ctf_archive_t *, const char *);
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extern int ctf_link (ctf_file_t *, int share_mode);
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typedef const char *ctf_link_strtab_string_f (uint32_t *offset, void *arg);
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extern int ctf_link_add_strtab (ctf_file_t *, ctf_link_strtab_string_f *,
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void *);
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typedef ctf_link_sym_t *ctf_link_iter_symbol_f (ctf_link_sym_t *dest,
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void *arg);
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extern int ctf_link_shuffle_syms (ctf_file_t *, ctf_link_iter_symbol_f *,
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void *);
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extern unsigned char *ctf_link_write (ctf_file_t *, size_t *size,
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size_t threshold);
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/* Specialist linker functions. These functions are not used by ld, but can be
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used by other prgorams making use of the linker machinery for other purposes
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to customize its output. */
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extern int ctf_link_add_cu_mapping (ctf_file_t *, const char *from,
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const char *to);
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typedef char *ctf_link_memb_name_changer_f (ctf_file_t *,
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const char *, void *);
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extern void ctf_link_set_memb_name_changer
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(ctf_file_t *, ctf_link_memb_name_changer_f *, void *);
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extern void ctf_setdebug (int debug);
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extern int ctf_getdebug (void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _CTF_API_H */
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