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: releng/6.3/sys/i386/include/elf.h 133027 2004-08-02 19:12:17Z dfr $
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
88 /*
89 * The following non-standard values are used for passing information
90 * from John Polstra's testbed program to the dynamic linker. These
91 * are expected to go away soon.
92 *
93 * Unfortunately, these overlap the Linux non-standard values, so they
94 * must not be used in the same context.
95 */
96 #define AT_BRK 10 /* Starting point for sbrk and brk. */
97 #define AT_DEBUG 11 /* Debugging level. */
98
99 /*
100 * The following non-standard values are used in Linux ELF binaries.
101 */
102 #define AT_NOTELF 10 /* Program is not ELF ?? */
103 #define AT_UID 11 /* Real uid. */
104 #define AT_EUID 12 /* Effective uid. */
105 #define AT_GID 13 /* Real gid. */
106 #define AT_EGID 14 /* Effective gid. */
107
108 #define AT_COUNT 15 /* Count of defined aux entry types. */
109
110 /*
111 * Relocation types.
112 */
113
114 #define R_386_NONE 0 /* No relocation. */
115 #define R_386_32 1 /* Add symbol value. */
116 #define R_386_PC32 2 /* Add PC-relative symbol value. */
117 #define R_386_GOT32 3 /* Add PC-relative GOT offset. */
118 #define R_386_PLT32 4 /* Add PC-relative PLT offset. */
119 #define R_386_COPY 5 /* Copy data from shared object. */
120 #define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
121 #define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */
122 #define R_386_RELATIVE 8 /* Add load address of shared object. */
123 #define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */
124 #define R_386_GOTPC 10 /* Add PC-relative GOT table address. */
125 #define R_386_TLS_TPOFF 14 /* Negative offset in static TLS block */
126 #define R_386_TLS_IE 15 /* Absolute address of GOT for -ve static TLS */
127 #define R_386_TLS_GOTIE 16 /* GOT entry for negative static TLS block */
128 #define R_386_TLS_LE 17 /* Negative offset relative to static TLS */
129 #define R_386_TLS_GD 18 /* 32 bit offset to GOT (index,off) pair */
130 #define R_386_TLS_LDM 19 /* 32 bit offset to GOT (index,zero) pair */
131 #define R_386_TLS_GD_32 24 /* 32 bit offset to GOT (index,off) pair */
132 #define R_386_TLS_GD_PUSH 25 /* pushl instruction for Sun ABI GD sequence */
133 #define R_386_TLS_GD_CALL 26 /* call instruction for Sun ABI GD sequence */
134 #define R_386_TLS_GD_POP 27 /* popl instruction for Sun ABI GD sequence */
135 #define R_386_TLS_LDM_32 28 /* 32 bit offset to GOT (index,zero) pair */
136 #define R_386_TLS_LDM_PUSH 29 /* pushl instruction for Sun ABI LD sequence */
137 #define R_386_TLS_LDM_CALL 30 /* call instruction for Sun ABI LD sequence */
138 #define R_386_TLS_LDM_POP 31 /* popl instruction for Sun ABI LD sequence */
139 #define R_386_TLS_LDO_32 32 /* 32 bit offset from start of TLS block */
140 #define R_386_TLS_IE_32 33 /* 32 bit offset to GOT static TLS offset entry */
141 #define R_386_TLS_LE_32 34 /* 32 bit offset within static TLS block */
142 #define R_386_TLS_DTPMOD32 35 /* GOT entry containing TLS index */
143 #define R_386_TLS_DTPOFF32 36 /* GOT entry containing TLS offset */
144 #define R_386_TLS_TPOFF32 37 /* GOT entry of -ve static TLS offset */
145
146 #define R_386_COUNT 38 /* Count of defined relocation types. */
147
148 /* Define "machine" characteristics */
149 #define ELF_TARG_CLASS ELFCLASS32
150 #define ELF_TARG_DATA ELFDATA2LSB
151 #define ELF_TARG_MACH EM_386
152 #define ELF_TARG_VER 1
153
154 #endif /* !_MACHINE_ELF_H_ */
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