FreeBSD/Linux Kernel Cross Reference
sys/i386/include/elf.h
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
58 typedef 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 */
69 typedef 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
94 #define AT_COUNT 16 /* Count of defined aux entry types. */
95
96 /*
97 * Relocation types.
98 */
99
100 #define R_386_COUNT 38 /* Count of defined relocation types. */
101
102 /* Define "machine" characteristics */
103 #define ELF_TARG_CLASS ELFCLASS32
104 #define ELF_TARG_DATA ELFDATA2LSB
105 #define ELF_TARG_MACH EM_386
106 #define ELF_TARG_VER 1
107
108 #define ET_DYN_LOAD_ADDR 0x01001000
109
110 #endif /* !_MACHINE_ELF_H_ */
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