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