elf.h revision 270123 
1/*-
2 * Copyright (c) 2001 David E. O'Brien
3 * Copyright (c) 1996-1997 John D. Polstra.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: head/sys/arm/include/elf.h 270123 2014-08-18 02:44:56Z imp $
28 */
29
30#ifndef _MACHINE_ELF_H_
31#define	_MACHINE_ELF_H_ 1
32
33/*
34 * EABI ELF definitions for the StrongARM architecture.
35 * See "ARM ELF", document no. `SWS ESPC 0003 A-08' for details.
36 */
37
38#include <sys/elf32.h>	/* Definitions common to all 32 bit architectures. */
39
40#define	__ELF_WORD_SIZE	32	/* Used by <sys/elf_generic.h> */
41#include <sys/elf_generic.h>
42
43typedef struct {        /* Auxiliary vector entry on initial stack */
44	int     a_type;                 /* Entry type. */
45	union {
46		long    a_val;          /* Integer value. */
47		void    *a_ptr;         /* Address. */
48		void    (*a_fcn)(void); /* Function pointer (not used). */
49	} a_un;
50} Elf32_Auxinfo;
51
52__ElfType(Auxinfo);
53
54#define	ELF_ARCH	EM_ARM
55
56#define	ELF_MACHINE_OK(x) ((x) == EM_ARM)
57
58/* Unwind info section type */
59#define	PT_ARM_EXIDX (PT_LOPROC + 1)
60
61/*
62 * Relocation types.
63 */
64
65/* Values for a_type. */
66#define AT_NULL         0       /* Terminates the vector. */
67#define AT_IGNORE       1       /* Ignored entry. */
68#define AT_EXECFD       2       /* File descriptor of program to load. */
69#define AT_PHDR         3       /* Program header of program already loaded. */
70#define AT_PHENT        4       /* Size of each program header entry. */
71#define AT_PHNUM        5       /* Number of program header entries. */
72#define AT_PAGESZ       6       /* Page size in bytes. */
73#define AT_BASE         7       /* Interpreter's base address. */
74#define AT_FLAGS        8       /* Flags (unused). */
75#define AT_ENTRY        9       /* Where interpreter should transfer control. */
76#define AT_NOTELF       10      /* Program is not ELF ?? */
77#define AT_UID          11      /* Real uid. */
78#define AT_EUID         12      /* Effective uid. */
79#define AT_GID          13      /* Real gid. */
80#define AT_EGID         14      /* Effective gid. */
81#define	AT_EXECPATH	15	/* Path to the executable. */
82#define	AT_CANARY	16	/* Canary for SSP */
83#define	AT_CANARYLEN	17	/* Length of the canary. */
84#define	AT_OSRELDATE	18	/* OSRELDATE. */
85#define	AT_NCPUS	19	/* Number of CPUs. */
86#define	AT_PAGESIZES	20	/* Pagesizes. */
87#define	AT_PAGESIZESLEN	21	/* Number of pagesizes. */
88#define	AT_TIMEKEEP	22	/* Pointer to timehands. */
89#define	AT_STACKPROT	23	/* Initial stack protection. */
90
91#define AT_COUNT        24      /* Count of defined aux entry types. */
92
93#define	R_ARM_COUNT		33	/* Count of defined relocation types. */
94
95
96/* Define "machine" characteristics */
97#define	ELF_TARG_CLASS	ELFCLASS32
98#ifdef __ARMEB__
99#define	ELF_TARG_DATA	ELFDATA2MSB
100#else
101#define	ELF_TARG_DATA	ELFDATA2LSB
102#endif
103#define	ELF_TARG_MACH	EM_ARM
104#define	ELF_TARG_VER	1
105
106/* Defines specific for arm headers */
107#define EF_ARM_EABIMASK      0xff000000
108#define EF_ARM_EABI_VERSION(x) (((x) & EF_ARM_EABIMASK) >> 24)
109#define EF_ARM_EABI_VERSION_UNKNOWN 0
110#define EF_ARM_EABI_FREEBSD_MIN 4
111
112/*
113 * Magic number for the elf trampoline, chosen wisely to be an immediate
114 * value.
115 */
116#define MAGIC_TRAMP_NUMBER	0x5c000003
117
118#define	ET_DYN_LOAD_ADDR 0x12000
119
120#endif /* !_MACHINE_ELF_H_ */
121