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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASMARM_ELF_H
2#define __ASMARM_ELF_H
3
Russell King4a5222c2006-11-09 14:07:52 +00004#ifndef __ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -07005/*
6 * ELF register definitions..
7 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <asm/ptrace.h>
9#include <asm/user.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
11typedef unsigned long elf_greg_t;
12typedef unsigned long elf_freg_t[3];
13
Russell King4a5222c2006-11-09 14:07:52 +000014#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
15typedef elf_greg_t elf_gregset_t[ELF_NGREG];
16
17typedef struct user_fp elf_fpregset_t;
18#endif
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#define EM_ARM 40
21#define EF_ARM_APCS26 0x08
22#define EF_ARM_SOFT_FLOAT 0x200
23#define EF_ARM_EABI_MASK 0xFF000000
24
25#define R_ARM_NONE 0
26#define R_ARM_PC24 1
27#define R_ARM_ABS32 2
Daniel Jacobowitzc2e26112005-12-14 22:04:22 +000028#define R_ARM_CALL 28
29#define R_ARM_JUMP24 29
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Linus Torvalds1da177e2005-04-16 15:20:36 -070031/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 * These are used to set parameters in the core dumps.
33 */
34#define ELF_CLASS ELFCLASS32
35#ifdef __ARMEB__
Mike Frysinger718a30a2005-06-03 20:52:26 +010036#define ELF_DATA ELFDATA2MSB
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#else
Mike Frysinger718a30a2005-06-03 20:52:26 +010038#define ELF_DATA ELFDATA2LSB
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#endif
40#define ELF_ARCH EM_ARM
41
Russell King5974eaa2006-11-09 14:37:06 +000042/*
43 * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
44 */
45#define HWCAP_SWP 1
46#define HWCAP_HALF 2
47#define HWCAP_THUMB 4
48#define HWCAP_26BIT 8 /* Play it safe */
49#define HWCAP_FAST_MULT 16
50#define HWCAP_FPA 32
51#define HWCAP_VFP 64
52#define HWCAP_EDSP 128
53#define HWCAP_JAVA 256
54#define HWCAP_IWMMXT 512
Lennert Buytenhek99e4a6d2006-12-18 00:59:10 +010055#define HWCAP_CRUNCH 1024
David Woodhouse6ff63402006-09-21 08:34:39 +010056
Russell King5974eaa2006-11-09 14:37:06 +000057#ifdef __KERNEL__
Russell King4a5222c2006-11-09 14:07:52 +000058#ifndef __ASSEMBLY__
59/*
60 * This yields a mask that user programs can use to figure out what
61 * instruction set this cpu supports.
62 */
63#define ELF_HWCAP (elf_hwcap)
64extern unsigned int elf_hwcap;
65
66/*
67 * This yields a string that ld.so will use to load implementation
68 * specific libraries for optimization. This is more specific in
69 * intent than poking at uname or /proc/cpuinfo.
70 *
71 * For now we just provide a fairly general string that describes the
72 * processor family. This could be made more specific later if someone
73 * implemented optimisations that require it. 26-bit CPUs give you
74 * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
75 * supported). 32-bit CPUs give you "v3[lb]" for anything based on an
76 * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
77 * core.
78 */
79#define ELF_PLATFORM_SIZE 8
80#define ELF_PLATFORM (elf_platform)
81
82extern char elf_platform[];
83#endif
84
David Woodhouse6ff63402006-09-21 08:34:39 +010085/*
86 * This is used to ensure we don't load something for the wrong architecture.
87 */
Russell King4a5222c2006-11-09 14:07:52 +000088#define elf_check_arch(x) ((x)->e_machine == EM_ARM && ELF_PROC_OK(x))
89
90/*
91 * 32-bit code is always OK. Some cpus can do 26-bit, some can't.
92 */
93#define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
94
95#define ELF_THUMB_OK(x) \
96 ((elf_hwcap & HWCAP_THUMB && ((x)->e_entry & 1) == 1) || \
97 ((x)->e_entry & 3) == 0)
98
99#define ELF_26BIT_OK(x) \
100 ((elf_hwcap & HWCAP_26BIT && (x)->e_flags & EF_ARM_APCS26) || \
101 ((x)->e_flags & EF_ARM_APCS26) == 0)
David Woodhouse6ff63402006-09-21 08:34:39 +0100102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#define USE_ELF_CORE_DUMP
104#define ELF_EXEC_PAGESIZE 4096
105
106/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
107 use of this is to invoke "./ld.so someprog" to test out a new version of
108 the loader. We need to make sure that it is out of the way of the program
109 that it will "exec", and that there is sufficient room for the brk. */
110
111#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
112
113/* When the program starts, a1 contains a pointer to a function to be
114 registered with atexit, as per the SVR4 ABI. A value of 0 means we
115 have no such handler. */
116#define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118/*
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100119 * Since the FPA coprocessor uses CP1 and CP2, and iWMMXt uses CP0
120 * and CP1, we only enable access to the iWMMXt coprocessor if the
121 * binary is EABI or softfloat (and thus, guaranteed not to use
122 * FPA instructions.)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 */
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100124#define SET_PERSONALITY(ex, ibcs2) \
125 do { \
126 if ((ex).e_flags & EF_ARM_APCS26) { \
127 set_personality(PER_LINUX); \
128 } else { \
129 set_personality(PER_LINUX_32BIT); \
130 if (elf_hwcap & HWCAP_IWMMXT && (ex).e_flags & (EF_ARM_EABI_MASK | EF_ARM_SOFT_FLOAT)) \
131 set_thread_flag(TIF_USING_IWMMXT); \
132 else \
133 clear_thread_flag(TIF_USING_IWMMXT); \
134 } \
135 } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137#endif
138
139#endif