[netwatch.git] / include / elf.h

/* This file defines standard ELF types, structures, and macros.
   Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ian Lance Taylor <ian@cygnus.com>.

   The GNU C 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.

   The GNU C 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 the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _ELF_H
#define	_ELF_H 1

#include <stdint.h>

/* Standard ELF types.  */

/* Type for a 16-bit quantity.  */
typedef uint16_t Elf32_Half;
typedef uint16_t Elf64_Half;

/* Types for signed and unsigned 32-bit quantities.  */
typedef uint32_t Elf32_Word;
typedef	int32_t  Elf32_Sword;
typedef uint32_t Elf64_Word;
typedef	int32_t  Elf64_Sword;

/* Types for signed and unsigned 64-bit quantities.  */
typedef uint64_t Elf32_Xword;
typedef	int64_t  Elf32_Sxword;
typedef uint64_t Elf64_Xword;
typedef	int64_t  Elf64_Sxword;

/* Type of addresses.  */
typedef uint32_t Elf32_Addr;
typedef uint64_t Elf64_Addr;

/* Type of file offsets.  */
typedef uint32_t Elf32_Off;
typedef uint64_t Elf64_Off;

/* Type for section indices, which are 16-bit quantities.  */
typedef uint16_t Elf32_Section;
typedef uint16_t Elf64_Section;

/* Type of symbol indices.  */
typedef uint32_t Elf32_Symndx;
typedef uint64_t Elf64_Symndx;


/* The ELF file header.  This appears at the start of every ELF file.  */

#define EI_NIDENT (16)

typedef struct
{
  unsigned char	e_ident[EI_NIDENT];	/** Magic number and other info */
  Elf32_Half	e_type;			/** Object file type */
  Elf32_Half	e_machine;		/** Architecture */
  Elf32_Word	e_version;		/** Object file version */
  Elf32_Addr	e_entry;		/** Entry point virtual address */
  Elf32_Off	e_phoff;		/** Program header table file offset */
  Elf32_Off	e_shoff;		/** Section header table file offset */
  Elf32_Word	e_flags;		/** Processor-specific flags */
  Elf32_Half	e_ehsize;		/** ELF header size in bytes */
  Elf32_Half	e_phentsize;		/** Program header table entry size */
  Elf32_Half	e_phnum;		/** Program header table entry count */
  Elf32_Half	e_shentsize;		/** Section header table entry size */
  Elf32_Half	e_shnum;		/** Section header table entry count */
  Elf32_Half	e_shstrndx;		/** Section header string table index */
} Elf32_Ehdr;

/* Fields in the e_ident array.  The EI_* macros are indices into the
   array.  The macros under each EI_* macro are the values the byte
   may have.  */

#define EI_MAG0		0		/* File identification byte 0 index */
#define ELFMAG0		0x7f		/* Magic number byte 0 */

#define EI_MAG1		1		/* File identification byte 1 index */
#define ELFMAG1		'E'		/* Magic number byte 1 */

#define EI_MAG2		2		/* File identification byte 2 index */
#define ELFMAG2		'L'		/* Magic number byte 2 */

#define EI_MAG3		3		/* File identification byte 3 index */
#define ELFMAG3		'F'		/* Magic number byte 3 */

/* Conglomeration of the identification bytes, for easy testing as a word.  */
#define	ELFMAG		"\177ELF"
#define	SELFMAG		4

#define EI_CLASS	4		/* File class byte index */
#define ELFCLASSNONE	0		/* Invalid class */
#define ELFCLASS32	1		/* 32-bit objects */
#define ELFCLASS64	2		/* 64-bit objects */
#define ELFCLASSNUM	3

#define EI_DATA		5		/* Data encoding byte index */
#define ELFDATANONE	0		/* Invalid data encoding */
#define ELFDATA2LSB	1		/* 2's complement, little endian */
#define ELFDATA2MSB	2		/* 2's complement, big endian */
#define ELFDATANUM	3

#define EI_VERSION	6		/* File version byte index */
					/* Value must be EV_CURRENT */

#define EI_OSABI	7		/* OS ABI identification */
#define ELFOSABI_SYSV		0	/* UNIX System V ABI */
#define ELFOSABI_HPUX		1	/* HP-UX */
#define ELFOSABI_FREEBSD        9       /* Free BSD */
#define ELFOSABI_ARM		97	/* ARM */
#define ELFOSABI_STANDALONE	255	/* Standalone (embedded) application */

#define EI_ABIVERSION	8		/* ABI version */

#define EI_PAD		9		/* Byte index of padding bytes */

/* Legal values for e_type (object file 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 defined types */
#define ET_LOPROC	0xff00		/* Processor-specific */
#define ET_HIPROC	0xffff		/* Processor-specific */

/* Legal values for e_machine (architecture).  */

#define EM_NONE		 0		/* No machine */
#define EM_M32		 1		/* AT&T WE 32100 */
#define EM_SPARC	 2		/* SUN SPARC */
#define EM_386		 3		/* Intel 80386 */
#define EM_68K		 4		/* Motorola m68k family */
#define EM_88K		 5		/* Motorola m88k family */
#define EM_486		 6		/* Intel 80486 */
#define EM_860		 7		/* Intel 80860 */
#define EM_MIPS		 8		/* MIPS R3000 big-endian */
#define EM_S370		 9		/* Amdahl */
#define EM_MIPS_RS4_BE	10		/* MIPS R4000 big-endian */
#define EM_RS6000	11		/* RS6000 */

#define EM_PARISC	15		/* HPPA */
#define EM_nCUBE	16		/* nCUBE */
#define EM_VPP500	17		/* Fujitsu VPP500 */
#define EM_SPARC32PLUS	18		/* Sun's "v8plus" */
#define EM_960		19		/* Intel 80960 */
#define EM_PPC		20		/* PowerPC */

#define EM_V800		36		/* NEC V800 series */
#define EM_FR20		37		/* Fujitsu FR20 */
#define EM_RH32		38		/* TRW RH32 */
#define EM_MMA		39		/* Fujitsu MMA */
#define EM_ARM		40		/* ARM */
#define EM_FAKE_ALPHA	41		/* Digital Alpha */
#define EM_SH		42		/* Hitachi SH */
#define EM_SPARCV9	43		/* SPARC v9 64-bit */
#define EM_TRICORE	44		/* Siemens Tricore */
#define EM_ARC		45		/* Argonaut RISC Core */
#define EM_H8_300	46		/* Hitachi H8/300 */
#define EM_H8_300H	47		/* Hitachi H8/300H */
#define EM_H8S		48		/* Hitachi H8S */
#define EM_H8_500	49		/* Hitachi H8/500 */
#define EM_IA_64	50		/* Intel Merced */
#define EM_MIPS_X	51		/* Stanford MIPS-X */
#define EM_COLDFIRE	52		/* Motorola Coldfire */
#define EM_68HC12	53		/* Motorola M68HC12 */
#define EM_NUM		54

/* If it is necessary to assign new unofficial EM_* values, please
   pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
   chances of collision with official or non-GNU unofficial values.  */

#define EM_ALPHA	0x9026

/* Legal values for e_version (version).  */

#define EV_NONE		0		/* Invalid ELF version */
#define EV_CURRENT	1		/* Current version */
#define EV_NUM		2

/* Section header.  */

typedef struct
{
  Elf32_Word	sh_name;		/** Section name (string tbl index) */
  Elf32_Word	sh_type;		/** Section type */
  Elf32_Word	sh_flags;		/** Section flags */
  Elf32_Addr	sh_addr;		/** Section virtual addr at execution */
  Elf32_Off	sh_offset;		/** Section file offset */
  Elf32_Word	sh_size;		/** Section size in bytes */
  Elf32_Word	sh_link;		/** Link to another section */
  Elf32_Word	sh_info;		/** Additional section information */
  Elf32_Word	sh_addralign;		/** Section alignment */
  Elf32_Word	sh_entsize;		/** Entry size if section holds table */
} Elf32_Shdr;

/* Special section indices.  */

#define SHN_UNDEF	0		/* Undefined section */
#define SHN_LORESERVE	0xff00		/* Start of reserved indices */
#define SHN_LOPROC	0xff00		/* Start of processor-specific */
#define SHN_HIPROC	0xff1f		/* End of processor-specific */
#define SHN_ABS		0xfff1		/* Associated symbol is absolute */
#define SHN_COMMON	0xfff2		/* Associated symbol is common */
#define SHN_HIRESERVE	0xffff		/* End of reserved indices */

/* Legal values for sh_type (section type).  */

#define SHT_NULL	 0		/* Section header table entry unused */
#define SHT_PROGBITS	 1		/* Program data */
#define SHT_SYMTAB	 2		/* Symbol table */
#define SHT_STRTAB	 3		/* String table */
#define SHT_RELA	 4		/* Relocation entries with addends */
#define SHT_HASH	 5		/* Symbol hash table */
#define SHT_DYNAMIC	 6		/* Dynamic linking information */
#define SHT_NOTE	 7		/* Notes */
#define SHT_NOBITS	 8		/* Program space with no data (bss) */
#define SHT_REL		 9		/* Relocation entries, no addends */
#define SHT_SHLIB	 10		/* Reserved */
#define SHT_DYNSYM	 11		/* Dynamic linker symbol table */
#define	SHT_NUM		 12		/* Number of defined types.  */
#define SHT_LOOS	 0x60000000	/* Start OS-specific */
#define SHT_LOSUNW	 0x6ffffffb	/* Sun-specific low bound.  */
#define SHT_SUNW_COMDAT  0x6ffffffb
#define SHT_SUNW_syminfo 0x6ffffffc
#define SHT_GNU_verdef	 0x6ffffffd	/* Version definition section.  */
#define SHT_GNU_verneed	 0x6ffffffe	/* Version needs section.  */
#define SHT_GNU_versym	 0x6fffffff	/* Version symbol table.  */
#define SHT_HISUNW	 0x6fffffff	/* Sun-specific high bound.  */
#define SHT_HIOS	 0x6fffffff	/* End OS-specific type */
#define SHT_LOPROC	 0x70000000	/* Start of processor-specific */
#define SHT_HIPROC	 0x7fffffff	/* End of processor-specific */
#define SHT_LOUSER	 0x80000000	/* Start of application-specific */
#define SHT_HIUSER	 0x8fffffff	/* End of application-specific */

/* Legal values for sh_flags (section flags).  */

#define SHF_WRITE	(1 << 0)	/* Writable */
#define SHF_ALLOC	(1 << 1)	/* Occupies memory during execution */
#define SHF_EXECINSTR	(1 << 2)	/* Executable */
#define SHF_MASKPROC	0xf0000000	/* Processor-specific */

/* --- Simplified ELF header --- */
typedef struct simple_elf {
  const char *  e_fname;       /* filename of binary */
  unsigned long e_entry;       /* entry point virtual address */
  unsigned long e_txtoff;      /* offset of text segment in file */
  unsigned long e_txtlen;      /* length of text segment in bytes */
  unsigned long e_txtstart;    /* start of text segment virtual address */
  unsigned long e_datoff;      /* offset of data segment in file */
  unsigned long e_datlen;      /* length of data segment in bytes */
  unsigned long e_datstart;    /* start of data segment in virtual memory */
  unsigned long e_rodatoff;    /* offset of rodata segment in file */
  unsigned long e_rodatlen;    /* length of rodata segment in bytes */
  unsigned long e_rodatstart;  /* start of rodata segment in virtual memory*/
  unsigned long e_bsslen;      /* length of bss  segment in bytes */
} simple_elf_t;

 /* --- Defines --- */
#define NMAGIC 0410 /* 0x108 */
#define N_MAGIC(exec) ((exec).a_midmag & 0xffff)
#define N_BADMAG(x) (N_MAGIC(x) != NMAGIC) 

#define ELF_NOTELF  -1
#define ELF_SUCCESS  0
#define NOT_PRESENT  -2

/*
 * elf function prototypes
 */
extern int getbytes( const char *filename, int offset, int size, char *buf);
extern int elf_load_helper( simple_elf_t *se_hdr, const char *fname );
extern int elf_check_header( const char *fname );

#endif	/* elf.h */
Commit	Line	Data
d2fd2046 JP	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 */