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: src/sys/i386/include/elf.h,v 1.2.2.2 1999/09/05 08:11:46 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 /*
39 * Auxiliary vector entries for passing information to the interpreter.
40 *
41 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
42 * but POSIX lays claim to all symbols ending with "_t".
43 */
44
45 typedef struct { /* Auxiliary vector entry on initial stack */
46 int a_type; /* Entry type. */
47 union {
48 long a_val; /* Integer value. */
49 void *a_ptr; /* Address. */
50 void (*a_fcn)(void); /* Function pointer (not used). */
51 } a_un;
52 } Elf32_Auxinfo;
53
54 /* Values for a_type. */
55 #define AT_NULL 0 /* Terminates the vector. */
56 #define AT_IGNORE 1 /* Ignored entry. */
57 #define AT_EXECFD 2 /* File descriptor of program to load. */
58 #define AT_PHDR 3 /* Program header of program already loaded. */
59 #define AT_PHENT 4 /* Size of each program header entry. */
60 #define AT_PHNUM 5 /* Number of program header entries. */
61 #define AT_PAGESZ 6 /* Page size in bytes. */
62 #define AT_BASE 7 /* Interpreter's base address. */
63 #define AT_FLAGS 8 /* Flags (unused for i386). */
64 #define AT_ENTRY 9 /* Where interpreter should transfer control. */
65
66 /*
67 * The following non-standard values are used for passing information
68 * from John Polstra's testbed program to the dynamic linker. These
69 * are expected to go away soon.
70 *
71 * Unfortunately, these overlap the Linux non-standard values, so they
72 * must not be used in the same context.
73 */
74 #define AT_BRK 10 /* Starting point for sbrk and brk. */
75 #define AT_DEBUG 11 /* Debugging level. */
76
77 /*
78 * The following non-standard values are used in Linux ELF binaries.
79 */
80 #define AT_NOTELF 10 /* Program is not ELF ?? */
81 #define AT_UID 11 /* Real uid. */
82 #define AT_EUID 12 /* Effective uid. */
83 #define AT_GID 13 /* Real gid. */
84 #define AT_EGID 14 /* Effective gid. */
85
86 #define AT_COUNT 15 /* Count of defined aux entry types. */
87
88 /*
89 * Relocation types.
90 */
91
92 #define R_386_NONE 0 /* No relocation. */
93 #define R_386_32 1 /* Add symbol value. */
94 #define R_386_PC32 2 /* Add PC-relative symbol value. */
95 #define R_386_GOT32 3 /* Add PC-relative GOT offset. */
96 #define R_386_PLT32 4 /* Add PC-relative PLT offset. */
97 #define R_386_COPY 5 /* Copy data from shared object. */
98 #define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
99 #define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */
100 #define R_386_RELATIVE 8 /* Add load address of shared object. */
101 #define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */
102 #define R_386_GOTPC 10 /* Add PC-relative GOT table address. */
103
104 #define R_386_COUNT 11 /* Count of defined relocation types. */
105
106 /* Define "machine" characteristics */
107 #define ELF_TARG_CLASS ELFCLASS32
108 #define ELF_TARG_DATA ELFDATA2LSB
109 #define ELF_TARG_MACH EM_386
110 #define ELF_TARG_VER 1
111
112 #endif /* !_MACHINE_ELF_H_ */
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