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