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 AMD64 architecture.
34 */
35
36
37 #ifndef __ELF_WORD_SIZE
38 #define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */
39 #endif
40 #include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
41 #include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */
42 #include <sys/elf_generic.h>
43
44 #define ELF_ARCH EM_X86_64
45
46 #define ELF_MACHINE_OK(x) ((x) == EM_X86_64)
47
48 /*
49 * Auxiliary vector entries for passing information to the interpreter.
50 *
51 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
52 * but POSIX lays claim to all symbols ending with "_t".
53 */
54 typedef struct { /* Auxiliary vector entry on initial stack */
55 int a_type; /* Entry type. */
56 union {
57 int a_val; /* Integer value. */
58 } a_un;
59 } Elf32_Auxinfo;
60
61
62 typedef struct { /* Auxiliary vector entry on initial stack */
63 long a_type; /* Entry type. */
64 union {
65 long a_val; /* Integer value. */
66 void *a_ptr; /* Address. */
67 void (*a_fcn)(void); /* Function pointer (not used). */
68 } a_un;
69 } Elf64_Auxinfo;
70
71 __ElfType(Auxinfo);
72
73 /* Values for a_type. */
74 #define AT_NULL 0 /* Terminates the vector. */
75 #define AT_IGNORE 1 /* Ignored entry. */
76 #define AT_EXECFD 2 /* File descriptor of program to load. */
77 #define AT_PHDR 3 /* Program header of program already loaded. */
78 #define AT_PHENT 4 /* Size of each program header entry. */
79 #define AT_PHNUM 5 /* Number of program header entries. */
80 #define AT_PAGESZ 6 /* Page size in bytes. */
81 #define AT_BASE 7 /* Interpreter's base address. */
82 #define AT_FLAGS 8 /* Flags (unused for i386). */
83 #define AT_ENTRY 9 /* Where interpreter should transfer control. */
84
85 /*
86 * The following non-standard values are used for passing information
87 * from John Polstra's testbed program to the dynamic linker. These
88 * are expected to go away soon.
89 *
90 * Unfortunately, these overlap the Linux non-standard values, so they
91 * must not be used in the same context.
92 */
93 #define AT_BRK 10 /* Starting point for sbrk and brk. */
94 #define AT_DEBUG 11 /* Debugging level. */
95
96 /*
97 * The following non-standard values are used in Linux ELF binaries.
98 */
99 #define AT_NOTELF 10 /* Program is not ELF ?? */
100 #define AT_UID 11 /* Real uid. */
101 #define AT_EUID 12 /* Effective uid. */
102 #define AT_GID 13 /* Real gid. */
103 #define AT_EGID 14 /* Effective gid. */
104
105 #define AT_COUNT 15 /* Count of defined aux entry types. */
106
107 /*
108 * Relocation types.
109 */
110
111 #define R_X86_64_COUNT 24 /* Count of defined relocation types. */
112
113 /* Define "machine" characteristics */
114 #if __ELF_WORD_SIZE == 32
115 #define ELF_TARG_CLASS ELFCLASS32
116 #else
117 #define ELF_TARG_CLASS ELFCLASS64
118 #endif
119 #define ELF_TARG_DATA ELFDATA2LSB
120 #define ELF_TARG_MACH EM_X86_64
121 #define ELF_TARG_VER 1
122
123 #endif /* !_MACHINE_ELF_H_ */
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