elfstructs.h

xen 3.2.2 源码

#ifndef __XEN_PUBLIC_ELFSTRUCTS_H__
#define __XEN_PUBLIC_ELFSTRUCTS_H__ 1
/*
 * Copyright (c) 1995, 1996 Erik Theisen.  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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

typedef uint8_t		Elf_Byte;

typedef uint32_t	Elf32_Addr;	/* Unsigned program address */
typedef uint32_t	Elf32_Off;	/* Unsigned file offset */
typedef int32_t		Elf32_Sword;	/* Signed large integer */
typedef uint32_t	Elf32_Word;	/* Unsigned large integer */
typedef uint16_t	Elf32_Half;	/* Unsigned medium integer */

typedef uint64_t	Elf64_Addr;
typedef uint64_t	Elf64_Off;
typedef int32_t		Elf64_Shalf;

typedef int32_t		Elf64_Sword;
typedef uint32_t	Elf64_Word;

typedef int64_t		Elf64_Sxword;
typedef uint64_t	Elf64_Xword;

typedef uint32_t	Elf64_Half;
typedef uint16_t	Elf64_Quarter;

/*
 * e_ident[] identification indexes
 * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html
 */
#define EI_MAG0		0		/* file ID */
#define EI_MAG1		1		/* file ID */
#define EI_MAG2		2		/* file ID */
#define EI_MAG3		3		/* file ID */
#define EI_CLASS	4		/* file class */
#define EI_DATA		5		/* data encoding */
#define EI_VERSION	6		/* ELF header version */
#define EI_OSABI	7		/* OS/ABI ID */
#define EI_ABIVERSION	8		/* ABI version */
#define EI_PAD		9		/* start of pad bytes */
#define EI_NIDENT	16		/* Size of e_ident[] */

/* e_ident[] magic number */
#define	ELFMAG0		0x7f		/* e_ident[EI_MAG0] */
#define	ELFMAG1		'E'		/* e_ident[EI_MAG1] */
#define	ELFMAG2		'L'		/* e_ident[EI_MAG2] */
#define	ELFMAG3		'F'		/* e_ident[EI_MAG3] */
#define	ELFMAG		"\177ELF"	/* magic */
#define	SELFMAG		4		/* size of magic */

/* e_ident[] file class */
#define	ELFCLASSNONE	0		/* invalid */
#define	ELFCLASS32	1		/* 32-bit objs */
#define	ELFCLASS64	2		/* 64-bit objs */
#define	ELFCLASSNUM	3		/* number of classes */

/* e_ident[] data encoding */
#define ELFDATANONE	0		/* invalid */
#define ELFDATA2LSB	1		/* Little-Endian */
#define ELFDATA2MSB	2		/* Big-Endian */
#define ELFDATANUM	3		/* number of data encode defines */

/* e_ident[] Operating System/ABI */
#define ELFOSABI_SYSV		0	/* UNIX System V ABI */
#define ELFOSABI_HPUX		1	/* HP-UX operating system */
#define ELFOSABI_NETBSD		2	/* NetBSD */
#define ELFOSABI_LINUX		3	/* GNU/Linux */
#define ELFOSABI_HURD		4	/* GNU/Hurd */
#define ELFOSABI_86OPEN		5	/* 86Open common IA32 ABI */
#define ELFOSABI_SOLARIS	6	/* Solaris */
#define ELFOSABI_MONTEREY	7	/* Monterey */
#define ELFOSABI_IRIX		8	/* IRIX */
#define ELFOSABI_FREEBSD	9	/* FreeBSD */
#define ELFOSABI_TRU64		10	/* TRU64 UNIX */
#define ELFOSABI_MODESTO	11	/* Novell Modesto */
#define ELFOSABI_OPENBSD	12	/* OpenBSD */
#define ELFOSABI_ARM		97	/* ARM */
#define ELFOSABI_STANDALONE	255	/* Standalone (embedded) application */

/* e_ident */
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
                      (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
                      (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
                      (ehdr).e_ident[EI_MAG3] == ELFMAG3)

/* ELF Header */
typedef struct elfhdr {
	unsigned char	e_ident[EI_NIDENT]; /* ELF Identification */
	Elf32_Half	e_type;		/* object file type */
	Elf32_Half	e_machine;	/* machine */
	Elf32_Word	e_version;	/* object file version */
	Elf32_Addr	e_entry;	/* virtual entry point */
	Elf32_Off	e_phoff;	/* program header table offset */
	Elf32_Off	e_shoff;	/* section header table offset */
	Elf32_Word	e_flags;	/* processor-specific flags */
	Elf32_Half	e_ehsize;	/* ELF header size */
	Elf32_Half	e_phentsize;	/* program header entry size */
	Elf32_Half	e_phnum;	/* number of program header entries */
	Elf32_Half	e_shentsize;	/* section header entry size */
	Elf32_Half	e_shnum;	/* number of section header entries */
	Elf32_Half	e_shstrndx;	/* section header table's "section
					   header string table" entry offset */
} Elf32_Ehdr;

typedef struct {
	unsigned char	e_ident[EI_NIDENT];	/* Id bytes */
	Elf64_Quarter	e_type;			/* file type */
	Elf64_Quarter	e_machine;		/* machine type */
	Elf64_Half	e_version;		/* version number */
	Elf64_Addr	e_entry;		/* entry point */
	Elf64_Off	e_phoff;		/* Program hdr offset */
	Elf64_Off	e_shoff;		/* Section hdr offset */
	Elf64_Half	e_flags;		/* Processor flags */
	Elf64_Quarter	e_ehsize;		/* sizeof ehdr */
	Elf64_Quarter	e_phentsize;		/* Program header entry size */
	Elf64_Quarter	e_phnum;		/* Number of program headers */
	Elf64_Quarter	e_shentsize;		/* Section header entry size */
	Elf64_Quarter	e_shnum;		/* Number of section headers */
	Elf64_Quarter	e_shstrndx;		/* String table index */
} Elf64_Ehdr;

/* e_type */
#define ET_NONE		0		/* No file type */
#define ET_REL		1		/* relocatable file */
#define ET_EXEC		2		/* executable file */
#define ET_DYN		3		/* shared object file */
#define ET_CORE		4		/* core file */
#define ET_NUM		5		/* number of types */
#define ET_LOPROC	0xff00		/* reserved range for processor */
#define ET_HIPROC	0xffff		/*  specific e_type */

/* e_machine */
#define EM_NONE		0		/* No Machine */
#define EM_M32		1		/* AT&T WE 32100 */
#define EM_SPARC	2		/* SPARC */
#define EM_386		3		/* Intel 80386 */
#define EM_68K		4		/* Motorola 68000 */
#define EM_88K		5		/* Motorola 88000 */
#define EM_486		6		/* Intel 80486 - unused? */
#define EM_860		7		/* Intel 80860 */
#define EM_MIPS		8		/* MIPS R3000 Big-Endian only */
/*
 * Don't know if EM_MIPS_RS4_BE,
 * EM_SPARC64, EM_PARISC,
 * or EM_PPC are ABI compliant
 */
#define EM_MIPS_RS4_BE	10		/* MIPS R4000 Big-Endian */
#define EM_SPARC64	11		/* SPARC v9 64-bit unoffical */
#define EM_PARISC	15		/* HPPA */
#define EM_SPARC32PLUS	18		/* Enhanced instruction set SPARC */
#define EM_PPC		20		/* PowerPC */
#define EM_PPC64	21		/* PowerPC 64-bit */
#define EM_ARM		40		/* Advanced RISC Machines ARM */
#define EM_ALPHA	41		/* DEC ALPHA */
#define EM_SPARCV9	43		/* SPARC version 9 */
#define EM_ALPHA_EXP	0x9026		/* DEC ALPHA */
#define EM_IA_64	50		/* Intel Merced */
#define EM_X86_64	62		/* AMD x86-64 architecture */
#define EM_VAX		75		/* DEC VAX */

/* Version */
#define EV_NONE		0		/* Invalid */
#define EV_CURRENT	1		/* Current */
#define EV_NUM		2		/* number of versions */

/* Section Header */
typedef struct {
	Elf32_Word	sh_name;	/* name - index into section header
					   string table section */
	Elf32_Word	sh_type;	/* type */
	Elf32_Word	sh_flags;	/* flags */
	Elf32_Addr	sh_addr;	/* address */
	Elf32_Off	sh_offset;	/* file offset */
	Elf32_Word	sh_size;	/* section size */
	Elf32_Word	sh_link;	/* section header table index link */
	Elf32_Word	sh_info;	/* extra information */
	Elf32_Word	sh_addralign;	/* address alignment */
	Elf32_Word	sh_entsize;	/* section entry size */
} Elf32_Shdr;

typedef struct {
	Elf64_Half	sh_name;	/* section name */
	Elf64_Half	sh_type;	/* section type */
	Elf64_Xword	sh_flags;	/* section flags */
	Elf64_Addr	sh_addr;	/* virtual address */
	Elf64_Off	sh_offset;	/* file offset */
	Elf64_Xword	sh_size;	/* section size */
	Elf64_Half	sh_link;	/* link to another */
	Elf64_Half	sh_info;	/* misc info */
	Elf64_Xword	sh_addralign;	/* memory alignment */
	Elf64_Xword	sh_entsize;	/* table entry size */
} Elf64_Shdr;

/* Special Section Indexes */
#define SHN_UNDEF	0		/* undefined */
#define SHN_LORESERVE	0xff00		/* lower bounds of reserved indexes */
#define SHN_LOPROC	0xff00		/* reserved range for processor */
#define SHN_HIPROC	0xff1f		/*   specific section indexes */
#define SHN_ABS		0xfff1		/* absolute value */
#define SHN_COMMON	0xfff2		/* common symbol */
#define SHN_HIRESERVE	0xffff		/* upper bounds of reserved indexes */

/* 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_NUM		12		/* number of section types */
#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 */

/* Section names */
#define ELF_BSS         ".bss"		/* uninitialized data */
#define ELF_DATA        ".data"		/* initialized data */
#define ELF_DEBUG       ".debug"	/* debug */
#define ELF_DYNAMIC     ".dynamic"	/* dynamic linking information */
#define ELF_DYNSTR      ".dynstr"	/* dynamic string table */
#define ELF_DYNSYM      ".dynsym"	/* dynamic symbol table */
#define ELF_FINI        ".fini"		/* termination code */
#define ELF_GOT         ".got"		/* global offset table */
#define ELF_HASH        ".hash"		/* symbol hash table */
#define ELF_INIT        ".init"		/* initialization code */
#define ELF_REL_DATA    ".rel.data"	/* relocation data */
#define ELF_REL_FINI    ".rel.fini"	/* relocation termination code */
#define ELF_REL_INIT    ".rel.init"	/* relocation initialization code */
#define ELF_REL_DYN     ".rel.dyn"	/* relocaltion dynamic link info */
#define ELF_REL_RODATA  ".rel.rodata"	/* relocation read-only data */
#define ELF_REL_TEXT    ".rel.text"	/* relocation code */
#define ELF_RODATA      ".rodata"	/* read-only data */
#define ELF_SHSTRTAB    ".shstrtab"	/* section header string table */
#define ELF_STRTAB      ".strtab"	/* string table */