/*
private.h - private definitions for libelf.
Copyright (C) 1995 - 1998 Michael Riepe <michael@stud.uni-hannover.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* @(#) $Id: private.h,v 1.10 1998/11/27 21:25:19 michael Exp $ */
#ifndef _PRIVATE_H
#define _PRIVATE_H
#define __LIBELF_INTERNAL__ 1
#if HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <sys/types.h>
#if STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#else /* STDC_HEADERS */
extern char *malloc(), *realloc();
extern void free(), bcopy();
extern int strcmp(), strncmp(), memcmp();
extern void *memcpy(), *memmove(), *memset();
#endif /* STDC_HEADERS */
#if HAVE_UNISTD_H
# include <unistd.h>
#else /* HAVE_UNISTD_H */
extern int read(), write();
extern off_t lseek();
#endif /* HAVE_UNISTD_H */
#if !HAVE_MEMCMP
# define memcmp strncmp
#endif /* !HAVE_MEMCMP */
#if !HAVE_MEMCPY
# define memcpy(d,s,n) bcopy(s,d,n)
#endif /* !HAVE_MEMCPY */
#if !HAVE_MEMMOVE
# define memmove(d,s,n) bcopy(s,d,n)
#endif /* !HAVE_MEMMOVE */
#if !HAVE_MEMSET
# define memset _elf_memset
extern void *_elf_memset();
#endif /* !HAVE_MEMSET */
#if HAVE_STRUCT_NLIST_DECLARATION
# define nlist __override_nlist_declaration
#endif /* HAVE_STRUCT_NLIST_DECLARATION */
#if NEED_LINK_H
# include <link.h>
#endif /* NEED_LINK_H */
#include <libelf.h>
#if HAVE_STRUCT_NLIST_DECLARATION
# undef nlist
#endif /* HAVE_STRUCT_NLIST_DECLARATION */
typedef struct Scn_Data Scn_Data;
/*
* ELF descriptor
*/
struct Elf {
/* common */
size_t e_size; /* file/member size */
size_t e_dsize; /* size of memory image */
Elf_Kind e_kind; /* kind of file */
char* e_data; /* file/member data */
char* e_rawdata; /* file/member raw data */
size_t e_idlen; /* identifier size */
int e_fd; /* file descriptor */
unsigned e_count; /* activation count */
/* archive members (still common) */
Elf* e_parent; /* NULL if not an archive member */
size_t e_next; /* 0 if not an archive member */
size_t e_base; /* 0 if not an archive member */
Elf* e_link; /* next archive member or NULL */
Elf_Arhdr* e_arhdr; /* archive member header or NULL */
/* archives */
size_t e_off; /* current member offset (for elf_begin) */
Elf* e_members; /* linked list of active archive members */
char* e_symtab; /* archive symbol table */
size_t e_symlen; /* length of archive symbol table */
char* e_strtab; /* archive string table */
size_t e_strlen; /* length of archive string table */
/* ELF files */
unsigned e_class; /* ELF class */
unsigned e_encoding; /* ELF data encoding */
unsigned e_version; /* ELF version */
char* e_ehdr; /* ELF header */
char* e_phdr; /* ELF program header table */
size_t e_phnum; /* size of program header table */
Elf_Scn* e_scn_1; /* first section */
Elf_Scn* e_scn_n; /* last section */
unsigned e_elf_flags; /* elf flags (ELF_F_*) */
unsigned e_ehdr_flags; /* ehdr flags (ELF_F_*) */
unsigned e_phdr_flags; /* phdr flags (ELF_F_*) */
/* misc flags */
unsigned e_readable : 1; /* file is readable */
unsigned e_writable : 1; /* file is writable */
unsigned e_disabled : 1; /* e_fd has been disabled */
unsigned e_cooked : 1; /* e_data was modified */
unsigned e_free_syms : 1; /* e_symtab is malloc'ed */
unsigned e_free_ehdr : 1; /* e_ehdr is malloc'ed */
unsigned e_free_phdr : 1; /* e_phdr is malloc'ed */
unsigned e_unmap_data : 1; /* e_data is mmap'ed */
unsigned e_memory : 1; /* created by elf_memory() */
/* magic number for debugging */
long e_magic;
};
#define ELF_MAGIC 0x012b649e
#define INIT_ELF {\
/* e_size */ 0,\
/* e_dsize */ 0,\
/* e_kind */ ELF_K_NONE,\
/* e_data */ NULL,\
/* e_rawdata */ NULL,\
/* e_idlen */ 0,\
/* e_fd */ -1,\
/* e_count */ 1,\
/* e_parent */ NULL,\
/* e_next */ 0,\
/* e_base */ 0,\
/* e_link */ NULL,\
/* e_arhdr */ NULL,\
/* e_off */ 0,\
/* e_members */ NULL,\
/* e_symtab */ NULL,\
/* e_symlen */ 0,\
/* e_strtab */ NULL,\
/* e_strlen */ 0,\
/* e_class */ ELFCLASSNONE,\
/* e_encoding */ ELFDATANONE,\
/* e_version */ EV_NONE,\
/* e_ehdr */ NULL,\
/* e_phdr */ NULL,\
/* e_phnum */ 0,\
/* e_scn_1 */ NULL,\
/* e_scn_n */ NULL,\
/* e_elf_flags */ 0,\
/* e_ehdr_flags */ 0,\
/* e_phdr_flags */ 0,\
/* e_readable */ 0,\
/* e_writable */ 0,\
/* e_disabled */ 0,\
/* e_cooked */ 0,\
/* e_free_syms */ 0,\
/* e_free_ehdr */ 0,\
/* e_free_phdr */ 0,\
/* e_unmap_data */ 0,\
/* e_memory */ 0,\
/* e_magic */ ELF_MAGIC\
}
/*
* Section descriptor
*/
struct Elf_Scn {
Elf_Scn* s_link; /* pointer to next Elf_Scn */
Elf* s_elf; /* pointer to elf descriptor */
size_t s_index; /* number of this section */
unsigned s_scn_flags; /* section flags (ELF_F_*) */
unsigned s_shdr_flags; /* shdr flags (ELF_F_*) */
Scn_Data* s_data_1; /* first data buffer */
Scn_Data* s_data_n; /* last data buffer */
Scn_Data* s_rawdata; /* raw data buffer */
/* data copied from shdr */
unsigned s_type; /* section type */
size_t s_offset; /* section offset */
size_t s_size; /* section size */
/* misc flags */
unsigned s_freeme : 1; /* this Elf_Scn was malloc'ed */
/* section header */
union {
#if __LIBELF64
Elf64_Shdr u_shdr64;
#endif /* __LIBELF64 */
Elf32_Shdr u_shdr32;
} s_uhdr;
/* magic number for debugging */
long s_magic;
};
#define s_shdr32 s_uhdr.u_shdr32
#define s_shdr64 s_uhdr.u_shdr64
#define SCN_MAGIC 0x012c747d
#define INIT_SCN {\
/* s_link */ NULL,\
/* s_elf */ NULL,\
/* s_index */ 0,\
/* s_scn_flags */ 0,\
/* s_shdr_flags */ 0,\
/* s_data_1 */ NULL,\
/* s_data_n */ NULL,\
/* s_rawdata */ NULL,\
/* s_type */ SHT_NULL,\
/* s_offset */ 0,\
/* s_size */ 0,\
/* s_freeme */ 0,\
/* s_uhdr */ {{0,}},\
/* s_magic */ SCN_MAGIC\
}
/*
* Data descriptor
*/
struct Scn_Data {
Elf_Data sd_data; /* must be first! */
Scn_Data* sd_link; /* pointer to next Scn_Data */
char* sd_memdata; /* memory image of section */
unsigned sd_data_flags; /* data flags (ELF_F_*) */
/* misc flags */
unsigned sd_freeme : 1; /* this Scn_Data was malloc'ed */
unsigned sd_free_data : 1; /* sd_memdata is malloc'ed */
/* magic number for debugging */
long sd_magic;
};
#define DATA_MAGIC 0x01072639
#define INIT_DATA {\
{\
/* d_buf */ NULL,\
/* d_type */ ELF_T_BYTE,\
/* d_size */ 0,\
/* d_off */ 0,\
/* d_align */ 0,\
/* d_version */ EV_NONE\
},\
/* sd_link */ NULL,\
/* sd_memdata */ NULL,\
/* sd_data_flags */ 0,\
/* sd_freeme */ 0,\
/* sd_free_data */ 0,\
/* sd_magic */ DATA_MAGIC\
}
/*
* Private status variables
*/
extern unsigned _elf_version;
extern int _elf_errno;
extern int _elf_fill;
/*
* Private functions
*/
extern void *_elf_read __P((Elf*, void*, size_t, size_t));
extern void *_elf_mmap __P((Elf*));
extern int _elf_cook __P((Elf*));
extern char *_elf_getehdr __P((Elf*, unsigned));
extern Elf_Data *_elf_xlatetom(const Elf*, Elf_Data*, const Elf_Data*);
/*
* Private data
*/
extern const Elf_Scn _elf_scn_init;
extern const Scn_Data _elf_data_init;
extern const Elf_Type _elf_scn_types[SHT_NUM];
extern const size_t _elf_fmsize[2][EV_CURRENT - EV_NONE][ELF_T_NUM][2];
/*
* Access macros for _elf_fmsize[]
*/
#define _fmsize(c,v,t,w) \
(_elf_fmsize[(c)-ELFCLASS32][(v)-EV_NONE-1][(t)-ELF_T_BYTE][(w)])
#define _fsize(c,v,t) _fmsize((c),(v),(t),1)
#define _msize(c,v,t) _fmsize((c),(v),(t),0)
/*
* Various checks
*/
#define valid_class(c) ((c) >= ELFCLASS32 && (c) <= ELFCLASS64)
#define valid_encoding(e) ((e) >= ELFDATA2LSB && (e) <= ELFDATA2MSB)
#define valid_version(v) ((v) > EV_NONE && (v) <= EV_CURRENT)
#define valid_type(t) ((t) >= ELF_T_BYTE && (t) < ELF_T_NUM)
#define valid_scntype(s) ((s) >= SHT_NULL && (s) < SHT_NUM)
/*
* Error codes
*/
enum {
#define __err__(a,b) a,
#include <errors.h> /* include constants from errors.h */
#undef __err__
ERROR_NUM
};
#define seterr(err) (_elf_errno = (err))
/*
* Sizes of data types (external representation)
* These definitions should be in <elf.h>, but...
*/
#ifndef ELF32_FSZ_ADDR
# define ELF32_FSZ_ADDR 4
# define ELF32_FSZ_HALF 2
# define ELF32_FSZ_OFF 4
# define ELF32_FSZ_SWORD 4
# define ELF32_FSZ_WORD 4
#endif /* ELF32_FSZ_ADDR */
#ifndef ELF64_FSZ_ADDR
# define ELF64_FSZ_ADDR 8
# define ELF64_FSZ_HALF 2
# define ELF64_FSZ_OFF 8
# define ELF64_FSZ_SWORD 4
# define ELF64_FSZ_SXWORD 8
# define ELF64_FSZ_WORD 4
# define ELF64_FSZ_XWORD 8
#endif /* ELF64_FSZ_ADDR */
/*
* Alignment
*/
#define _ELF32_ALIGN_PHDR 4
#define _ELF32_ALIGN_SHDR 4
#define _ELF64_ALIGN_PHDR 8
#define _ELF64_ALIGN_SHDR 8
/*
* Debugging
*/
#if ENABLE_DEBUG
# include <stdio.h>
# if __STDC__
# define elf_assert(x) ((void)((x)||__elf_assert(__FILE__,__LINE__,#x)))
# else /* __STDC__ */
# define elf_assert(x) ((void)((x)||__elf_assert(__FILE__,__LINE__,"x")))
# endif /* __STDC__ */
# define __elf_assert(f,l,x) (fprintf(stderr,\
"%s:%u: libelf assertion failure: %s\n",(f),(l),(x)),abort(),0)
#else /* ENABLE_DEBUG */
# define elf_assert(x) ((void)0)
#endif /* ENABLE_DEBUG */
#endif /* _PRIVATE_H */