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 * $FreeBSD$
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#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
38#include <sys/elf64.h>	/* Definitions common to all 64 bit architectures. */
39#endif
40
41#ifndef __ELF_WORD_SIZE
42#define	__ELF_WORD_SIZE	32	/* Used by <sys/elf_generic.h> */
43#endif
44
45#include <sys/elf_generic.h>
46
47#define	ELF_ARCH	EM_386
48
49#define	ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486)
50
51/*
52 * Auxiliary vector entries for passing information to the interpreter.
53 *
54 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
55 * but POSIX lays claim to all symbols ending with "_t".
56 */
57
58typedef struct {	/* Auxiliary vector entry on initial stack */
59	int	a_type;			/* Entry type. */
60	union {
61		long	a_val;		/* Integer value. */
62		void	*a_ptr;		/* Address. */
63		void	(*a_fcn)(void);	/* Function pointer (not used). */
64	} a_un;
65} Elf32_Auxinfo;
66
67#if __ELF_WORD_SIZE == 64
68/* Fake for amd64 loader support */
69typedef struct {
70	int fake;
71} Elf64_Auxinfo;
72#endif
73
74__ElfType(Auxinfo);
75
76/* Values for a_type. */
77#define	AT_NULL		0	/* Terminates the vector. */
78#define	AT_IGNORE	1	/* Ignored entry. */
79#define	AT_EXECFD	2	/* File descriptor of program to load. */
80#define	AT_PHDR		3	/* Program header of program already loaded. */
81#define	AT_PHENT	4	/* Size of each program header entry. */
82#define	AT_PHNUM	5	/* Number of program header entries. */
83#define	AT_PAGESZ	6	/* Page size in bytes. */
84#define	AT_BASE		7	/* Interpreter's base address. */
85#define	AT_FLAGS	8	/* Flags (unused for i386). */
86#define	AT_ENTRY	9	/* Where interpreter should transfer control. */
87#define	AT_NOTELF	10	/* Program is not ELF ?? */
88#define	AT_UID		11	/* Real uid. */
89#define	AT_EUID		12	/* Effective uid. */
90#define	AT_GID		13	/* Real gid. */
91#define	AT_EGID		14	/* Effective gid. */
92#define	AT_EXECPATH	15	/* Path to the executable. */
93#define	AT_CANARY	16	/* Canary for SSP. */
94#define	AT_CANARYLEN	17	/* Length of the canary. */
95#define	AT_OSRELDATE	18	/* OSRELDATE. */
96#define	AT_NCPUS	19	/* Number of CPUs. */
97#define	AT_PAGESIZES	20	/* Pagesizes. */
98#define	AT_PAGESIZESLEN	21	/* Number of pagesizes. */
99#define	AT_TIMEKEEP	22	/* Pointer to timehands. */
100#define	AT_STACKPROT	23	/* Initial stack protection. */
101
102#define	AT_COUNT	24	/* Count of defined aux entry types. */
103
104/*
105 * Relocation types.
106 */
107
108#define	R_386_COUNT	38	/* Count of defined relocation types. */
109
110/* Define "machine" characteristics */
111#define	ELF_TARG_CLASS	ELFCLASS32
112#define	ELF_TARG_DATA	ELFDATA2LSB
113#define	ELF_TARG_MACH	EM_386
114#define	ELF_TARG_VER	1
115
116#define	ET_DYN_LOAD_ADDR 0x01001000
117
118#endif /* !_MACHINE_ELF_H_ */
119