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Small and modular dynamic link-editor.

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bg- 2006-12-01 15:12:27 +00:00
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commit 4f592bfc88
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/*
* Copyright (c) 2006, Swedish Institute of Computer Science
* 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.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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.
*
* @(#)$Id: elf32.h,v 1.1 2006/12/01 15:12:27 bg- Exp $
*/
/* @(#)$Id: elf32.h,v 1.1 2006/12/01 15:12:27 bg- Exp $ */
#ifndef ELF32_H
#define ELF32_H
/*
* ELF definitions common to all 32-bit architectures.
*/
#define EI_NIDENT 16
typedef unsigned long elf32_word;
typedef signed long elf32_sword;
typedef unsigned short elf32_half;
typedef unsigned long elf32_off;
typedef unsigned long elf32_addr;
struct elf32_ehdr {
unsigned char e_ident[EI_NIDENT]; /* ident bytes */
elf32_half e_type; /* file type */
elf32_half e_machine; /* target machine */
elf32_word e_version; /* file version */
elf32_addr e_entry; /* start address */
elf32_off e_phoff; /* phdr file offset */
elf32_off e_shoff; /* shdr file offset */
elf32_word e_flags; /* file flags */
elf32_half e_ehsize; /* sizeof ehdr */
elf32_half e_phentsize; /* sizeof phdr */
elf32_half e_phnum; /* number phdrs */
elf32_half e_shentsize; /* sizeof shdr */
elf32_half e_shnum; /* number shdrs */
elf32_half e_shstrndx; /* shdr string index */
};
/* Values for e_type. */
#define ET_NONE 0 /* Unknown type. */
#define ET_REL 1 /* Relocatable. */
#define ET_EXEC 2 /* Executable. */
#define ET_DYN 3 /* Shared object. */
#define ET_CORE 4 /* Core file. */
struct elf32_shdr {
elf32_word sh_name; /* section name */
elf32_word sh_type; /* SHT_... */
elf32_word sh_flags; /* SHF_... */
elf32_addr sh_addr; /* virtual address */
elf32_off sh_offset; /* file offset */
elf32_word sh_size; /* section size */
elf32_word sh_link; /* misc info */
elf32_word sh_info; /* misc info */
elf32_word sh_addralign; /* memory alignment */
elf32_word sh_entsize; /* entry size if table */
};
/* sh_type */
#define SHT_NULL 0 /* inactive */
#define SHT_PROGBITS 1 /* program defined information */
#define SHT_SYMTAB 2 /* symbol table section */
#define SHT_STRTAB 3 /* string table section */
#define SHT_RELA 4 /* relocation section with addends*/
#define SHT_HASH 5 /* symbol hash table section */
#define SHT_DYNAMIC 6 /* dynamic section */
#define SHT_NOTE 7 /* note section */
#define SHT_NOBITS 8 /* no space section */
#define SHT_REL 9 /* relation section without addends */
#define SHT_SHLIB 10 /* reserved - purpose unknown */
#define SHT_DYNSYM 11 /* dynamic symbol table section */
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
#define SHT_HIPROC 0x7fffffff /* specific section header types */
#define SHT_LOUSER 0x80000000 /* reserved range for application */
#define SHT_HIUSER 0xffffffff /* specific indexes */
struct elf32_rel {
elf32_addr r_offset; /* Location to be relocated. */
elf32_word r_info; /* Relocation type and symbol index. */
};
struct elf32_rela {
elf32_addr r_offset; /* Location to be relocated. */
elf32_word r_info; /* Relocation type and symbol index. */
elf32_sword r_addend; /* Addend. */
};
struct elf32_sym {
elf32_word st_name; /* String table index of name. */
elf32_addr st_value; /* Symbol value. */
elf32_word st_size; /* Size of associated object. */
unsigned char st_info; /* Type and binding information. */
unsigned char st_other; /* Reserved (not used). */
elf32_half st_shndx; /* Section index of symbol. */
};
#define ELF32_R_SYM(info) ((info) >> 8)
#define ELF32_R_TYPE(info) ((unsigned char)(info))
#define ELF_MAGIC_HEADER "\177ELF\001\001\001"
#define ELF_MAGIC_HEADER_SIZE 7
#endif /* ELF32_H */