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#if defined(__i386__) || defined(_MACHINE_ELF_WANT_32BIT)
33
34/*
35 * ELF definitions for the i386 architecture.
36 */
37
38#include <sys/elf32.h>	/* Definitions common to all 32 bit architectures. */
39#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
40#include <sys/elf64.h>	/* Definitions common to all 64 bit architectures. */
41#endif
42
43#ifndef __ELF_WORD_SIZE
44#define	__ELF_WORD_SIZE	32	/* Used by <sys/elf_generic.h> */
45#endif
46
47#include <sys/elf_generic.h>
48
49#define	ELF_ARCH	EM_386
50
51#define	ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486)
52
53/*
54 * Auxiliary vector entries for passing information to the interpreter.
55 *
56 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
57 * but POSIX lays claim to all symbols ending with "_t".
58 */
59
60typedef struct {	/* Auxiliary vector entry on initial stack */
61	int	a_type;			/* Entry type. */
62	union {
63		long	a_val;		/* Integer value. */
64		void	*a_ptr;		/* Address. */
65		void	(*a_fcn)(void);	/* Function pointer (not used). */
66	} a_un;
67} Elf32_Auxinfo;
68
69#if __ELF_WORD_SIZE == 64
70/* Fake for amd64 loader support */
71typedef struct {
72	int fake;
73} Elf64_Auxinfo;
74#endif
75
76__ElfType(Auxinfo);
77
78/* Values for a_type. */
79#define	AT_NULL		0	/* Terminates the vector. */
80#define	AT_IGNORE	1	/* Ignored entry. */
81#define	AT_EXECFD	2	/* File descriptor of program to load. */
82#define	AT_PHDR		3	/* Program header of program already loaded. */
83#define	AT_PHENT	4	/* Size of each program header entry. */
84#define	AT_PHNUM	5	/* Number of program header entries. */
85#define	AT_PAGESZ	6	/* Page size in bytes. */
86#define	AT_BASE		7	/* Interpreter's base address. */
87#define	AT_FLAGS	8	/* Flags (unused for i386). */
88#define	AT_ENTRY	9	/* Where interpreter should transfer control. */
89#define	AT_NOTELF	10	/* Program is not ELF ?? */
90#define	AT_UID		11	/* Real uid. */
91#define	AT_EUID		12	/* Effective uid. */
92#define	AT_GID		13	/* Real gid. */
93#define	AT_EGID		14	/* Effective gid. */
94#define	AT_EXECPATH	15	/* Path to the executable. */
95#define	AT_CANARY	16	/* Canary for SSP. */
96#define	AT_CANARYLEN	17	/* Length of the canary. */
97#define	AT_OSRELDATE	18	/* OSRELDATE. */
98#define	AT_NCPUS	19	/* Number of CPUs. */
99#define	AT_PAGESIZES	20	/* Pagesizes. */
100#define	AT_PAGESIZESLEN	21	/* Number of pagesizes. */
101#define	AT_TIMEKEEP	22	/* Pointer to timehands. */
102#define	AT_STACKPROT	23	/* Initial stack protection. */
103
104#define	AT_COUNT	24	/* Count of defined aux entry types. */
105
106/*
107 * Relocation types.
108 */
109
110#define	R_386_COUNT	38	/* Count of defined relocation types. */
111
112/* Define "machine" characteristics */
113#define	ELF_TARG_CLASS	ELFCLASS32
114#define	ELF_TARG_DATA	ELFDATA2LSB
115#define	ELF_TARG_MACH	EM_386
116#define	ELF_TARG_VER	1
117
118#define	ET_DYN_LOAD_ADDR 0x01001000
119
120#elif defined(__amd64__)
121
122/*
123 * ELF definitions for the AMD64 architecture.
124 */
125
126#ifndef __ELF_WORD_SIZE
127#define	__ELF_WORD_SIZE	64	/* Used by <sys/elf_generic.h> */
128#endif
129#include <sys/elf32.h>	/* Definitions common to all 32 bit architectures. */
130#include <sys/elf64.h>	/* Definitions common to all 64 bit architectures. */
131#include <sys/elf_generic.h>
132
133#define	ELF_ARCH	EM_X86_64
134#define	ELF_ARCH32	EM_386
135
136#define	ELF_MACHINE_OK(x) ((x) == EM_X86_64)
137
138/*
139 * Auxiliary vector entries for passing information to the interpreter.
140 *
141 * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
142 * but POSIX lays claim to all symbols ending with "_t".
143 */
144typedef struct {	/* Auxiliary vector entry on initial stack */
145	int	a_type;			/* Entry type. */
146	union {
147		int	a_val;		/* Integer value. */
148	} a_un;
149} Elf32_Auxinfo;
150
151
152typedef struct {	/* Auxiliary vector entry on initial stack */
153	long	a_type;			/* Entry type. */
154	union {
155		long	a_val;		/* Integer value. */
156		void	*a_ptr;		/* Address. */
157		void	(*a_fcn)(void);	/* Function pointer (not used). */
158	} a_un;
159} Elf64_Auxinfo;
160
161__ElfType(Auxinfo);
162
163/* Values for a_type. */
164#define	AT_NULL		0	/* Terminates the vector. */
165#define	AT_IGNORE	1	/* Ignored entry. */
166#define	AT_EXECFD	2	/* File descriptor of program to load. */
167#define	AT_PHDR		3	/* Program header of program already loaded. */
168#define	AT_PHENT	4	/* Size of each program header entry. */
169#define	AT_PHNUM	5	/* Number of program header entries. */
170#define	AT_PAGESZ	6	/* Page size in bytes. */
171#define	AT_BASE		7	/* Interpreter's base address. */
172#define	AT_FLAGS	8	/* Flags (unused for i386). */
173#define	AT_ENTRY	9	/* Where interpreter should transfer control. */
174#define	AT_NOTELF	10	/* Program is not ELF ?? */
175#define	AT_UID		11	/* Real uid. */
176#define	AT_EUID		12	/* Effective uid. */
177#define	AT_GID		13	/* Real gid. */
178#define	AT_EGID		14	/* Effective gid. */
179#define	AT_EXECPATH	15	/* Path to the executable. */
180#define	AT_CANARY	16	/* Canary for SSP */
181#define	AT_CANARYLEN	17	/* Length of the canary. */
182#define	AT_OSRELDATE	18	/* OSRELDATE. */
183#define	AT_NCPUS	19	/* Number of CPUs. */
184#define	AT_PAGESIZES	20	/* Pagesizes. */
185#define	AT_PAGESIZESLEN	21	/* Number of pagesizes. */
186#define	AT_TIMEKEEP	22	/* Pointer to timehands. */
187#define	AT_STACKPROT	23	/* Initial stack protection. */
188
189#define	AT_COUNT	24	/* Count of defined aux entry types. */
190
191/*
192 * Relocation types.
193 */
194
195#define	R_X86_64_COUNT	24	/* Count of defined relocation types. */
196
197/* Define "machine" characteristics */
198#if __ELF_WORD_SIZE == 32
199#define ELF_TARG_CLASS  ELFCLASS32
200#else
201#define ELF_TARG_CLASS  ELFCLASS64
202#endif
203#define	ELF_TARG_DATA	ELFDATA2LSB
204#define	ELF_TARG_MACH	EM_X86_64
205#define	ELF_TARG_VER	1
206
207#if __ELF_WORD_SIZE == 32
208#define	ET_DYN_LOAD_ADDR 0x01001000
209#else
210#define	ET_DYN_LOAD_ADDR 0x01021000
211#endif
212
213#endif /* __i386__, __amd64__ */
214
215#endif /* !_MACHINE_ELF_H_ */
216