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/*-
* Copyright (c) 2006 Joseph Koshy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LIBELF_H_
#define _LIBELF_H_
#include <sys/types.h>
#include <sys/elf32.h>
#include <sys/elf64.h>
#include <sys/queue.h>
/* Library private data structures */
typedef struct _Elf Elf;
typedef struct _Elf_Scn Elf_Scn;
/* File types */
typedef enum {
ELF_K_NONE = 0,
ELF_K_AR, /* `ar' archives */
ELF_K_COFF, /* COFF files (unsupported) */
ELF_K_ELF, /* ELF files */
ELF_K_NUM
} Elf_Kind;
#define ELF_K_FIRST ELF_K_NONE
#define ELF_K_LAST ELF_K_NUM
/* Data types */
typedef enum {
ELF_T_ADDR,
ELF_T_BYTE,
ELF_T_CAP,
ELF_T_DYN,
ELF_T_EHDR,
ELF_T_HALF,
ELF_T_LWORD,
ELF_T_MOVE,
ELF_T_MOVEP,
ELF_T_NOTE,
ELF_T_OFF,
ELF_T_PHDR,
ELF_T_REL,
ELF_T_RELA,
ELF_T_SHDR,
ELF_T_SWORD,
ELF_T_SXWORD,
ELF_T_SYMINFO,
ELF_T_SYM,
ELF_T_VDEF,
ELF_T_VNEED,
ELF_T_WORD,
ELF_T_XWORD,
ELF_T_GNUHASH, /* GNU style hash tables. */
ELF_T_NUM
} Elf_Type;
#define ELF_T_FIRST ELF_T_ADDR
#define ELF_T_LAST ELF_T_GNUHASH
/* Commands */
typedef enum {
ELF_C_NULL = 0,
ELF_C_CLR,
ELF_C_FDDONE,
ELF_C_FDREAD,
ELF_C_RDWR,
ELF_C_READ,
ELF_C_SET,
ELF_C_WRITE,
ELF_C_NUM
} Elf_Cmd;
#define ELF_C_FIRST ELF_C_NULL
#define ELF_C_LAST ELF_C_NUM
/*
* An `Elf_Data' structure describes data in an
* ELF section.
*/
typedef struct _Elf_Data {
/*
* `Public' members that are part of the ELF(3) API.
*/
uint64_t d_align;
void *d_buf;
uint64_t d_off;
uint64_t d_size;
Elf_Type d_type;
unsigned int d_version;
/*
* Members that are not part of the public API.
*/
Elf_Scn *d_scn; /* containing section */
unsigned int d_flags;
STAILQ_ENTRY(_Elf_Data) d_next;
} Elf_Data;
/*
* An `Elf_Arhdr' structure describes an archive
* header.
*/
typedef struct {
time_t ar_date;
char *ar_name; /* archive member name */
gid_t ar_gid;
mode_t ar_mode;
char *ar_rawname; /* 'raw' member name */
size_t ar_size;
uid_t ar_uid;
} Elf_Arhdr;
/*
* An `Elf_Arsym' describes an entry in the archive
* symbol table.
*/
typedef struct {
off_t as_off; /* byte offset to member's header */
unsigned long as_hash; /* elf_hash() value for name */
char *as_name; /* null terminated symbol name */
} Elf_Arsym;
/*
* Error numbers.
*/
enum Elf_Error {
ELF_E_NONE, /* No error */
ELF_E_ARCHIVE, /* Malformed ar(1) archive */
ELF_E_ARGUMENT, /* Invalid argument */
ELF_E_CLASS, /* Mismatched ELF class */
ELF_E_DATA, /* Invalid data descriptor */
ELF_E_HEADER, /* Missing or malformed ELF header */
ELF_E_IO, /* I/O error */
ELF_E_LAYOUT, /* Layout constraint violation */
ELF_E_MODE, /* Wrong mode for ELF descriptor */
ELF_E_RANGE, /* Value out of range */
ELF_E_RESOURCE, /* Resource exhaustion */
ELF_E_SECTION, /* Invalid section descriptor */
ELF_E_SEQUENCE, /* API calls out of sequence */
ELF_E_UNIMPL, /* Feature is unimplemented */
ELF_E_VERSION, /* Unknown API version */
ELF_E_NUM /* Max error number */
};
/*
* Flags defined by the API.
*/
#define ELF_F_LAYOUT 0x001U /* application will layout the file */
#define ELF_F_DIRTY 0x002U /* a section or ELF file is dirty */
__BEGIN_DECLS
Elf *elf_begin(int _fd, Elf_Cmd _cmd, Elf *_elf);
int elf_cntl(Elf *_elf, Elf_Cmd _cmd);
int elf_end(Elf *_elf);
const char *elf_errmsg(int _error);
int elf_errno(void);
void elf_fill(int _fill);
unsigned int elf_flagdata(Elf_Data *_data, Elf_Cmd _cmd, unsigned int _flags);
unsigned int elf_flagehdr(Elf *_elf, Elf_Cmd _cmd, unsigned int _flags);
unsigned int elf_flagelf(Elf *_elf, Elf_Cmd _cmd, unsigned int _flags);
unsigned int elf_flagphdr(Elf *_elf, Elf_Cmd _cmd, unsigned int _flags);
unsigned int elf_flagscn(Elf_Scn *_scn, Elf_Cmd _cmd, unsigned int _flags);
unsigned int elf_flagshdr(Elf_Scn *_scn, Elf_Cmd _cmd, unsigned int _flags);
Elf_Arhdr *elf_getarhdr(Elf *_elf);
Elf_Arsym *elf_getarsym(Elf *_elf, size_t *_ptr);
off_t elf_getbase(Elf *_elf);
Elf_Data *elf_getdata(Elf_Scn *, Elf_Data *);
char *elf_getident(Elf *_elf, size_t *_ptr);
int elf_getphnum(Elf *_elf, size_t *_dst);
Elf_Scn *elf_getscn(Elf *_elf, size_t _index);
int elf_getshnum(Elf *_elf, size_t *_dst);
int elf_getshstrndx(Elf *_elf, size_t *_dst);
unsigned long elf_hash(const char *_name);
Elf_Kind elf_kind(Elf *_elf);
Elf *elf_memory(char *_image, size_t _size);
size_t elf_ndxscn(Elf_Scn *_scn);
Elf_Data *elf_newdata(Elf_Scn *_scn);
Elf_Scn *elf_newscn(Elf *_elf);
Elf_Scn *elf_nextscn(Elf *_elf, Elf_Scn *_scn);
Elf_Cmd elf_next(Elf *_elf);
off_t elf_rand(Elf *_elf, off_t _off);
Elf_Data *elf_rawdata(Elf_Scn *_scn, Elf_Data *_data);
char *elf_rawfile(Elf *_elf, size_t *_size);
int elf_setshstrndx(Elf *_elf, size_t _shnum);
char *elf_strptr(Elf *_elf, size_t _section, size_t _offset);
off_t elf_update(Elf *_elf, Elf_Cmd _cmd);
unsigned int elf_version(unsigned int _version);
long elf32_checksum(Elf *_elf);
size_t elf32_fsize(Elf_Type _type, size_t _count,
unsigned int _version);
Elf32_Ehdr *elf32_getehdr(Elf *_elf);
Elf32_Phdr *elf32_getphdr(Elf *_elf);
Elf32_Shdr *elf32_getshdr(Elf_Scn *_scn);
Elf32_Ehdr *elf32_newehdr(Elf *_elf);
Elf32_Phdr *elf32_newphdr(Elf *_elf, size_t _count);
Elf_Data *elf32_xlatetof(Elf_Data *_dst, const Elf_Data *_src,
unsigned int _enc);
Elf_Data *elf32_xlatetom(Elf_Data *_dst, const Elf_Data *_src,
unsigned int _enc);
long elf64_checksum(Elf *_elf);
size_t elf64_fsize(Elf_Type _type, size_t _count,
unsigned int _version);
Elf64_Ehdr *elf64_getehdr(Elf *_elf);
Elf64_Phdr *elf64_getphdr(Elf *_elf);
Elf64_Shdr *elf64_getshdr(Elf_Scn *_scn);
Elf64_Ehdr *elf64_newehdr(Elf *_elf);
Elf64_Phdr *elf64_newphdr(Elf *_elf, size_t _count);
Elf_Data *elf64_xlatetof(Elf_Data *_dst, const Elf_Data *_src,
unsigned int _enc);
Elf_Data *elf64_xlatetom(Elf_Data *_dst, const Elf_Data *_src,
unsigned int _enc);
#if defined(LIBELF_TEST_HOOKS)
int _libelf_get_elf_class(Elf *_elf);
int _libelf_get_max_error(void);
const char *_libelf_get_no_error_message(void);
const char *_libelf_get_unknown_error_message(void);
void _libelf_set_elf_class(Elf *_elf, int _class);
void _libelf_set_error(int _error);
#endif /* LIBELF_TEST_HOOKS */
__END_DECLS
#endif /* _LIBELF_H_ */
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