2 * Copyright (c) 1996-1997 John D. Polstra.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/amd64/include/elf.h,v 1.25 2011/01/07 14:22:34 kib Exp $
33 * ELF definitions for the x86_64 architecture.
37 #ifndef __ELF_WORD_SIZE
38 #define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */
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>
44 #define ELF_ARCH EM_X86_64
46 #define ELF_MACHINE_OK(x) ((x) == EM_X86_64)
49 * Auxiliary vector entries for passing information to the interpreter.
51 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
52 * but POSIX lays claim to all symbols ending with "_t".
54 typedef struct { /* Auxiliary vector entry on initial stack */
55 int a_type; /* Entry type. */
57 int a_val; /* Integer value. */
62 typedef struct { /* Auxiliary vector entry on initial stack */
63 long a_type; /* Entry type. */
65 long a_val; /* Integer value. */
66 void *a_ptr; /* Address. */
67 void (*a_fcn)(void); /* Function pointer (not used). */
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. */
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.
90 * Unfortunately, these overlap the Linux non-standard values, so they
91 * must not be used in the same context.
93 #define AT_BRK 10 /* Starting point for sbrk and brk. */
94 #define AT_DEBUG 11 /* Debugging level. */
97 * The following non-standard values are used in Linux ELF binaries.
98 * Types 16 - 23 are not implemented in the kernel
100 #define AT_NOTELF 10 /* Program is not ELF ?? */
101 #define AT_UID 11 /* Real uid. */
102 #define AT_EUID 12 /* Effective uid. */
103 #define AT_GID 13 /* Real gid. */
104 #define AT_EGID 14 /* Effective gid. */
105 #define AT_EXECPATH 15 /* Path to the executable. */
106 #define AT_CANARY 16 /* Canary for SSP */
107 #define AT_CANARYLEN 17 /* Length of the canary. */
108 #define AT_OSRELDATE 18 /* OSRELDATE. */
109 #define AT_NCPUS 19 /* Number of CPUs. */
110 #define AT_PAGESIZES 20 /* Pagesizes. */
111 #define AT_PAGESIZESLEN 21 /* Number of pagesizes. */
112 #define AT_STACKPROT 23 /* Initial stack protection. */
114 #define AT_COUNT 24 /* Count of defined aux entry types. */
120 #define R_X86_64_NONE 0 /* No relocation. */
121 #define R_X86_64_64 1 /* Add 64 bit symbol value. */
122 #define R_X86_64_PC32 2 /* PC-relative 32 bit signed sym value. */
123 #define R_X86_64_GOT32 3 /* PC-relative 32 bit GOT offset. */
124 #define R_X86_64_PLT32 4 /* PC-relative 32 bit PLT offset. */
125 #define R_X86_64_COPY 5 /* Copy data from shared object. */
126 #define R_X86_64_GLOB_DAT 6 /* Set GOT entry to data address. */
127 #define R_X86_64_JMP_SLOT 7 /* Set GOT entry to code address. */
128 #define R_X86_64_RELATIVE 8 /* Add load address of shared object. */
129 #define R_X86_64_GOTPCREL 9 /* Add 32 bit signed pcrel offset to GOT. */
130 #define R_X86_64_32 10 /* Add 32 bit zero extended symbol value */
131 #define R_X86_64_32S 11 /* Add 32 bit sign extended symbol value */
132 #define R_X86_64_16 12 /* Add 16 bit zero extended symbol value */
133 #define R_X86_64_PC16 13 /* Add 16 bit signed extended pc relative symbol value */
134 #define R_X86_64_8 14 /* Add 8 bit zero extended symbol value */
135 #define R_X86_64_PC8 15 /* Add 8 bit signed extended pc relative symbol value */
136 #define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */
137 #define R_X86_64_DTPOFF64 17 /* Offset in TLS block */
138 #define R_X86_64_TPOFF64 18 /* Offset in static TLS block */
139 #define R_X86_64_TLSGD 19 /* PC relative offset to GD GOT entry */
140 #define R_X86_64_TLSLD 20 /* PC relative offset to LD GOT entry */
141 #define R_X86_64_DTPOFF32 21 /* Offset in TLS block */
142 #define R_X86_64_GOTTPOFF 22 /* PC relative offset to IE GOT entry */
143 #define R_X86_64_TPOFF32 23 /* Offset in static TLS block */
145 #define R_X86_64_COUNT 24 /* Count of defined relocation types. */
147 /* Define "machine" characteristics */
148 #if __ELF_WORD_SIZE == 32
149 #define ELF_TARG_CLASS ELFCLASS32
151 #define ELF_TARG_CLASS ELFCLASS64
153 #define ELF_TARG_DATA ELFDATA2LSB
154 #define ELF_TARG_MACH EM_X86_64
155 #define ELF_TARG_VER 1
158 * x86_64 load base for PIE binaries
160 #define ET_DYN_LOAD_ADDR 0x01021000
164 * On the i386 we load the dynamic linker where a userland call
165 * to mmap(0, ...) would put it. The rationale behind this
166 * calculation is that it leaves room for the heap to grow to
167 * its maximum allowed size.
169 #define ELF_RTLD_ADDR(vmspace) \
170 (round_page((vm_offset_t)(vmspace)->vm_daddr + maxdsiz))
173 #endif /* !_CPU_ELF_H_ */