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Commit	Line	Data
	1	/* This file defines standard ELF types, structures, and macros.
	2	Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
	3	This file is part of the GNU C Library.
	4	Contributed by Ian Lance Taylor <ian@cygnus.com>.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Library General Public License as
	8	published by the Free Software Foundation; either version 2 of the
	9	License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Library General Public License for more details.
	15
	16	You should have received a copy of the GNU Library General Public
	17	License along with the GNU C Library; see the file COPYING.LIB. If not,
	18	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21	#ifndef _ELF_H
	22	#define _ELF_H 1
	23
	24	#include <stdint.h>
	25
	26	/* Standard ELF types. */
	27
	28	/* Type for a 16-bit quantity. */
	29	typedef uint16_t Elf32_Half;
	30	typedef uint16_t Elf64_Half;
	31
	32	/* Types for signed and unsigned 32-bit quantities. */
	33	typedef uint32_t Elf32_Word;
	34	typedef int32_t Elf32_Sword;
	35	typedef uint32_t Elf64_Word;
	36	typedef int32_t Elf64_Sword;
	37
	38	/* Types for signed and unsigned 64-bit quantities. */
	39	typedef uint64_t Elf32_Xword;
	40	typedef int64_t Elf32_Sxword;
	41	typedef uint64_t Elf64_Xword;
	42	typedef int64_t Elf64_Sxword;
	43
	44	/* Type of addresses. */
	45	typedef uint32_t Elf32_Addr;
	46	typedef uint64_t Elf64_Addr;
	47
	48	/* Type of file offsets. */
	49	typedef uint32_t Elf32_Off;
	50	typedef uint64_t Elf64_Off;
	51
	52	/* Type for section indices, which are 16-bit quantities. */
	53	typedef uint16_t Elf32_Section;
	54	typedef uint16_t Elf64_Section;
	55
	56	/* Type of symbol indices. */
	57	typedef uint32_t Elf32_Symndx;
	58	typedef uint64_t Elf64_Symndx;
	59
	60
	61	/* The ELF file header. This appears at the start of every ELF file. */
	62
	63	#define EI_NIDENT (16)
	64
	65	typedef struct
	66	{
	67	unsigned char e_ident[EI_NIDENT]; /** Magic number and other info */
	68	Elf32_Half e_type; /** Object file type */
	69	Elf32_Half e_machine; /** Architecture */
	70	Elf32_Word e_version; /** Object file version */
	71	Elf32_Addr e_entry; /** Entry point virtual address */
	72	Elf32_Off e_phoff; /** Program header table file offset */
	73	Elf32_Off e_shoff; /** Section header table file offset */
	74	Elf32_Word e_flags; /** Processor-specific flags */
	75	Elf32_Half e_ehsize; /** ELF header size in bytes */
	76	Elf32_Half e_phentsize; /** Program header table entry size */
	77	Elf32_Half e_phnum; /** Program header table entry count */
	78	Elf32_Half e_shentsize; /** Section header table entry size */
	79	Elf32_Half e_shnum; /** Section header table entry count */
	80	Elf32_Half e_shstrndx; /** Section header string table index */
	81	} Elf32_Ehdr;
	82
	83	/* Fields in the e_ident array. The EI_* macros are indices into the
	84	array. The macros under each EI_* macro are the values the byte
	85	may have. */
	86
	87	#define EI_MAG0 0 /* File identification byte 0 index */
	88	#define ELFMAG0 0x7f /* Magic number byte 0 */
	89
	90	#define EI_MAG1 1 /* File identification byte 1 index */
	91	#define ELFMAG1 'E' /* Magic number byte 1 */
	92
	93	#define EI_MAG2 2 /* File identification byte 2 index */
	94	#define ELFMAG2 'L' /* Magic number byte 2 */
	95
	96	#define EI_MAG3 3 /* File identification byte 3 index */
	97	#define ELFMAG3 'F' /* Magic number byte 3 */
	98
	99	/* Conglomeration of the identification bytes, for easy testing as a word. */
	100	#define ELFMAG "\177ELF"
	101	#define SELFMAG 4
	102
	103	#define EI_CLASS 4 /* File class byte index */
	104	#define ELFCLASSNONE 0 /* Invalid class */
	105	#define ELFCLASS32 1 /* 32-bit objects */
	106	#define ELFCLASS64 2 /* 64-bit objects */
	107	#define ELFCLASSNUM 3
	108
	109	#define EI_DATA 5 /* Data encoding byte index */
	110	#define ELFDATANONE 0 /* Invalid data encoding */
	111	#define ELFDATA2LSB 1 /* 2's complement, little endian */
	112	#define ELFDATA2MSB 2 /* 2's complement, big endian */
	113	#define ELFDATANUM 3
	114
	115	#define EI_VERSION 6 /* File version byte index */
	116	/* Value must be EV_CURRENT */
	117
	118	#define EI_OSABI 7 /* OS ABI identification */
	119	#define ELFOSABI_SYSV 0 /* UNIX System V ABI */
	120	#define ELFOSABI_HPUX 1 /* HP-UX */
	121	#define ELFOSABI_FREEBSD 9 /* Free BSD */
	122	#define ELFOSABI_ARM 97 /* ARM */
	123	#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
	124
	125	#define EI_ABIVERSION 8 /* ABI version */
	126
	127	#define EI_PAD 9 /* Byte index of padding bytes */
	128
	129	/* Legal values for e_type (object file type). */
	130
	131	#define ET_NONE 0 /* No file type */
	132	#define ET_REL 1 /* Relocatable file */
	133	#define ET_EXEC 2 /* Executable file */
	134	#define ET_DYN 3 /* Shared object file */
	135	#define ET_CORE 4 /* Core file */
	136	#define ET_NUM 5 /* Number of defined types */
	137	#define ET_LOPROC 0xff00 /* Processor-specific */
	138	#define ET_HIPROC 0xffff /* Processor-specific */
	139
	140	/* Legal values for e_machine (architecture). */
	141
	142	#define EM_NONE 0 /* No machine */
	143	#define EM_M32 1 /* AT&T WE 32100 */
	144	#define EM_SPARC 2 /* SUN SPARC */
	145	#define EM_386 3 /* Intel 80386 */
	146	#define EM_68K 4 /* Motorola m68k family */
	147	#define EM_88K 5 /* Motorola m88k family */
	148	#define EM_486 6 /* Intel 80486 */
	149	#define EM_860 7 /* Intel 80860 */
	150	#define EM_MIPS 8 /* MIPS R3000 big-endian */
	151	#define EM_S370 9 /* Amdahl */
	152	#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
	153	#define EM_RS6000 11 /* RS6000 */
	154
	155	#define EM_PARISC 15 /* HPPA */
	156	#define EM_nCUBE 16 /* nCUBE */
	157	#define EM_VPP500 17 /* Fujitsu VPP500 */
	158	#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
	159	#define EM_960 19 /* Intel 80960 */
	160	#define EM_PPC 20 /* PowerPC */
	161
	162	#define EM_V800 36 /* NEC V800 series */
	163	#define EM_FR20 37 /* Fujitsu FR20 */
	164	#define EM_RH32 38 /* TRW RH32 */
	165	#define EM_MMA 39 /* Fujitsu MMA */
	166	#define EM_ARM 40 /* ARM */
	167	#define EM_FAKE_ALPHA 41 /* Digital Alpha */
	168	#define EM_SH 42 /* Hitachi SH */
	169	#define EM_SPARCV9 43 /* SPARC v9 64-bit */
	170	#define EM_TRICORE 44 /* Siemens Tricore */
	171	#define EM_ARC 45 /* Argonaut RISC Core */
	172	#define EM_H8_300 46 /* Hitachi H8/300 */
	173	#define EM_H8_300H 47 /* Hitachi H8/300H */
	174	#define EM_H8S 48 /* Hitachi H8S */
	175	#define EM_H8_500 49 /* Hitachi H8/500 */
	176	#define EM_IA_64 50 /* Intel Merced */
	177	#define EM_MIPS_X 51 /* Stanford MIPS-X */
	178	#define EM_COLDFIRE 52 /* Motorola Coldfire */
	179	#define EM_68HC12 53 /* Motorola M68HC12 */
	180	#define EM_NUM 54
	181
	182	/* If it is necessary to assign new unofficial EM_* values, please
	183	pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
	184	chances of collision with official or non-GNU unofficial values. */
	185
	186	#define EM_ALPHA 0x9026
	187
	188	/* Legal values for e_version (version). */
	189
	190	#define EV_NONE 0 /* Invalid ELF version */
	191	#define EV_CURRENT 1 /* Current version */
	192	#define EV_NUM 2
	193
	194	/* Section header. */
	195
	196	typedef struct
	197	{
	198	Elf32_Word sh_name; /** Section name (string tbl index) */
	199	Elf32_Word sh_type; /** Section type */
	200	Elf32_Word sh_flags; /** Section flags */
	201	Elf32_Addr sh_addr; /** Section virtual addr at execution */
	202	Elf32_Off sh_offset; /** Section file offset */
	203	Elf32_Word sh_size; /** Section size in bytes */
	204	Elf32_Word sh_link; /** Link to another section */
	205	Elf32_Word sh_info; /** Additional section information */
	206	Elf32_Word sh_addralign; /** Section alignment */
	207	Elf32_Word sh_entsize; /** Entry size if section holds table */
	208	} Elf32_Shdr;
	209
	210	/* Special section indices. */
	211
	212	#define SHN_UNDEF 0 /* Undefined section */
	213	#define SHN_LORESERVE 0xff00 /* Start of reserved indices */
	214	#define SHN_LOPROC 0xff00 /* Start of processor-specific */
	215	#define SHN_HIPROC 0xff1f /* End of processor-specific */
	216	#define SHN_ABS 0xfff1 /* Associated symbol is absolute */
	217	#define SHN_COMMON 0xfff2 /* Associated symbol is common */
	218	#define SHN_HIRESERVE 0xffff /* End of reserved indices */
	219
	220	/* Legal values for sh_type (section type). */
	221
	222	#define SHT_NULL 0 /* Section header table entry unused */
	223	#define SHT_PROGBITS 1 /* Program data */
	224	#define SHT_SYMTAB 2 /* Symbol table */
	225	#define SHT_STRTAB 3 /* String table */
	226	#define SHT_RELA 4 /* Relocation entries with addends */
	227	#define SHT_HASH 5 /* Symbol hash table */
	228	#define SHT_DYNAMIC 6 /* Dynamic linking information */
	229	#define SHT_NOTE 7 /* Notes */
	230	#define SHT_NOBITS 8 /* Program space with no data (bss) */
	231	#define SHT_REL 9 /* Relocation entries, no addends */
	232	#define SHT_SHLIB 10 /* Reserved */
	233	#define SHT_DYNSYM 11 /* Dynamic linker symbol table */
	234	#define SHT_NUM 12 /* Number of defined types. */
	235	#define SHT_LOOS 0x60000000 /* Start OS-specific */
	236	#define SHT_LOSUNW 0x6ffffffb /* Sun-specific low bound. */
	237	#define SHT_SUNW_COMDAT 0x6ffffffb
	238	#define SHT_SUNW_syminfo 0x6ffffffc
	239	#define SHT_GNU_verdef 0x6ffffffd /* Version definition section. */
	240	#define SHT_GNU_verneed 0x6ffffffe /* Version needs section. */
	241	#define SHT_GNU_versym 0x6fffffff /* Version symbol table. */
	242	#define SHT_HISUNW 0x6fffffff /* Sun-specific high bound. */
	243	#define SHT_HIOS 0x6fffffff /* End OS-specific type */
	244	#define SHT_LOPROC 0x70000000 /* Start of processor-specific */
	245	#define SHT_HIPROC 0x7fffffff /* End of processor-specific */
	246	#define SHT_LOUSER 0x80000000 /* Start of application-specific */
	247	#define SHT_HIUSER 0x8fffffff /* End of application-specific */
	248
	249	/* Legal values for sh_flags (section flags). */
	250
	251	#define SHF_WRITE (1 << 0) /* Writable */
	252	#define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
	253	#define SHF_EXECINSTR (1 << 2) /* Executable */
	254	#define SHF_MASKPROC 0xf0000000 /* Processor-specific */
	255
	256	/* --- Simplified ELF header --- */
	257	typedef struct simple_elf {
	258	const char * e_fname; /* filename of binary */
	259	unsigned long e_entry; /* entry point virtual address */
	260	unsigned long e_txtoff; /* offset of text segment in file */
	261	unsigned long e_txtlen; /* length of text segment in bytes */
	262	unsigned long e_txtstart; /* start of text segment virtual address */
	263	unsigned long e_datoff; /* offset of data segment in file */
	264	unsigned long e_datlen; /* length of data segment in bytes */
	265	unsigned long e_datstart; /* start of data segment in virtual memory */
	266	unsigned long e_rodatoff; /* offset of rodata segment in file */
	267	unsigned long e_rodatlen; /* length of rodata segment in bytes */
	268	unsigned long e_rodatstart; /* start of rodata segment in virtual memory*/
	269	unsigned long e_bsslen; /* length of bss segment in bytes */
	270	} simple_elf_t;
	271
	272	/* --- Defines --- */
	273	#define NMAGIC 0410 /* 0x108 */
	274	#define N_MAGIC(exec) ((exec).a_midmag & 0xffff)
	275	#define N_BADMAG(x) (N_MAGIC(x) != NMAGIC)
	276
	277	#define ELF_NOTELF -1
	278	#define ELF_SUCCESS 0
	279	#define NOT_PRESENT -2
	280
	281	/*
	282	* elf function prototypes
	283	*/
	284	extern int getbytes( const char filename, int offset, int size, char buf);
	285	extern int elf_load_helper( simple_elf_t se_hdr, const char fname );
	286	extern int elf_check_header( const char *fname );
	287
	288	#endif /* elf.h */