elf.h revision 38357 
1/*-
2 * Copyright (c) 1996-1997 John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *      $Id: elf.h,v 1.2 1997/08/30 18:59:48 peter Exp $
27 */
28
29#ifndef _MACHINE_ELF_H_
30#define _MACHINE_ELF_H_ 1
31
32/*
33 * ELF definitions for the i386 architecture.
34 */
35
36#include <sys/elf32.h>	/* Definitions common to all 32 bit architectures. */
37
38#define __ELF_WORD_SIZE	32	/* Used by <sys/elf_generic.h> */
39#include <sys/elf_generic.h>
40
41/*
42 * Auxiliary vector entries for passing information to the interpreter.
43 *
44 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
45 * but POSIX lays claim to all symbols ending with "_t".
46 */
47
48typedef struct {	/* Auxiliary vector entry on initial stack */
49	int	a_type;			/* Entry type. */
50	union {
51		long	a_val;		/* Integer value. */
52		void	*a_ptr;		/* Address. */
53		void	(*a_fcn)(void);	/* Function pointer (not used). */
54	} a_un;
55} Elf32_Auxinfo;
56
57__ElfType(Auxinfo);
58
59/* Values for a_type. */
60#define AT_NULL		0	/* Terminates the vector. */
61#define AT_IGNORE	1	/* Ignored entry. */
62#define AT_EXECFD	2	/* File descriptor of program to load. */
63#define AT_PHDR		3	/* Program header of program already loaded. */
64#define AT_PHENT	4	/* Size of each program header entry. */
65#define AT_PHNUM	5	/* Number of program header entries. */
66#define AT_PAGESZ	6	/* Page size in bytes. */
67#define AT_BASE		7	/* Interpreter's base address. */
68#define AT_FLAGS	8	/* Flags (unused for i386). */
69#define AT_ENTRY	9	/* Where interpreter should transfer control. */
70
71/*
72 * The following non-standard values are used for passing information
73 * from John Polstra's testbed program to the dynamic linker.  These
74 * are expected to go away soon.
75 *
76 * Unfortunately, these overlap the Linux non-standard values, so they
77 * must not be used in the same context.
78 */
79#define AT_BRK		10	/* Starting point for sbrk and brk. */
80#define AT_DEBUG	11	/* Debugging level. */
81
82/*
83 * The following non-standard values are used in Linux ELF binaries.
84 */
85#define AT_NOTELF	10	/* Program is not ELF ?? */
86#define AT_UID		11	/* Real uid. */
87#define AT_EUID		12	/* Effective uid. */
88#define AT_GID		13	/* Real gid. */
89#define AT_EGID		14	/* Effective gid. */
90
91#define AT_COUNT	15	/* Count of defined aux entry types. */
92
93/*
94 * Relocation types.
95 */
96
97#define R_386_NONE	0	/* No relocation. */
98#define R_386_32	1	/* Add symbol value. */
99#define R_386_PC32	2	/* Add PC-relative symbol value. */
100#define R_386_GOT32	3	/* Add PC-relative GOT offset. */
101#define R_386_PLT32	4	/* Add PC-relative PLT offset. */
102#define R_386_COPY	5	/* Copy data from shared object. */
103#define R_386_GLOB_DAT	6	/* Set GOT entry to data address. */
104#define R_386_JMP_SLOT	7	/* Set GOT entry to code address. */
105#define R_386_RELATIVE	8	/* Add load address of shared object. */
106#define R_386_GOTOFF	9	/* Add GOT-relative symbol address. */
107#define R_386_GOTPC	10	/* Add PC-relative GOT table address. */
108
109#define R_386_COUNT	11	/* Count of defined relocation types. */
110
111/* Define "machine" characteristics */
112#define ELF_TARG_CLASS	ELFCLASS32
113#define ELF_TARG_DATA	ELFDATA2LSB
114#define ELF_TARG_MACH	EM_386
115#define ELF_TARG_VER	1
116
117#endif /* !_MACHINE_ELF_H_ */
118