elf.h revision 161591 
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 161591 2006-08-24 23:00:03Z cognet $
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/*
59 * Relocation types.
60 */
61
62/* Values for a_type. */
63#define AT_NULL         0       /* Terminates the vector. */
64#define AT_IGNORE       1       /* Ignored entry. */
65#define AT_EXECFD       2       /* File descriptor of program to load. */
66#define AT_PHDR         3       /* Program header of program already loaded. */
67#define AT_PHENT        4       /* Size of each program header entry. */
68#define AT_PHNUM        5       /* Number of program header entries. */
69#define AT_PAGESZ       6       /* Page size in bytes. */
70#define AT_BASE         7       /* Interpreter's base address. */
71#define AT_FLAGS        8       /* Flags (unused). */
72#define AT_ENTRY        9       /* Where interpreter should transfer control. */
73
74#define AT_BRK          10      /* Starting point for sbrk and brk. */
75#define AT_DEBUG        11      /* Debugging level. */
76
77#define AT_NOTELF       10      /* Program is not ELF ?? */
78#define AT_UID          11      /* Real uid. */
79#define AT_EUID         12      /* Effective uid. */
80#define AT_GID          13      /* Real gid. */
81#define AT_EGID         14      /* Effective gid. */
82
83#define AT_COUNT        15      /* Count of defined aux entry types. */
84
85#define	R_ARM_NONE		0	/* No relocation. */
86#define	R_ARM_PC24		1
87#define	R_ARM_ABS32		2
88#define	R_ARM_REL32		3
89#define	R_ARM_PC13		4
90#define	R_ARM_ABS16		5
91#define	R_ARM_ABS12		6
92#define	R_ARM_THM_ABS5		7
93#define	R_ARM_ABS8		8
94#define	R_ARM_SBREL32		9
95#define	R_ARM_THM_PC22		10
96#define	R_ARM_THM_PC8		11
97#define	R_ARM_AMP_VCALL9	12
98#define	R_ARM_SWI24		13
99#define	R_ARM_THM_SWI8		14
100#define	R_ARM_XPC25		15
101#define	R_ARM_THM_XPC22		16
102#define	R_ARM_COPY		20	/* Copy data from shared object. */
103#define	R_ARM_GLOB_DAT		21	/* Set GOT entry to data address. */
104#define	R_ARM_JUMP_SLOT		22	/* Set GOT entry to code address. */
105#define	R_ARM_RELATIVE		23	/* Add load address of shared object. */
106#define	R_ARM_GOTOFF		24	/* Add GOT-relative symbol address. */
107#define	R_ARM_GOTPC		25	/* Add PC-relative GOT table address. */
108#define	R_ARM_GOT32		26	/* Add PC-relative GOT offset. */
109#define	R_ARM_PLT32		27	/* Add PC-relative PLT offset. */
110#define	R_ARM_GNU_VTENTRY	100
111#define	R_ARM_GNU_VTINHERIT	101
112#define	R_ARM_RSBREL32		250
113#define	R_ARM_THM_RPC22		251
114#define	R_ARM_RREL32		252
115#define	R_ARM_RABS32		253
116#define	R_ARM_RPC24		254
117#define	R_ARM_RBASE		255
118
119#define	R_ARM_COUNT		33	/* Count of defined relocation types. */
120
121
122/* Define "machine" characteristics */
123#define	ELF_TARG_CLASS	ELFCLASS32
124#ifdef __ARMEB__
125#define	ELF_TARG_DATA	ELFDATA2MSB
126#else
127#define	ELF_TARG_DATA	ELFDATA2LSB
128#endif
129#define	ELF_TARG_MACH	EM_ARM
130#define	ELF_TARG_VER	1
131
132/*
133 * Magic number for the elf trampoline, chosen wisely to be an immediate
134 * value.
135 */
136#define MAGIC_TRAMP_NUMBER	0x5c000003
137#endif /* !_MACHINE_ELF_H_ */
138