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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASMARM_ELF_H
2#define __ASMARM_ELF_H
3
Dan Williamsf393e992007-07-20 02:07:36 +01004#include <asm/hwcap.h>
5
Russell King4a5222c2006-11-09 14:07:52 +00006#ifndef __ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -07007/*
8 * ELF register definitions..
9 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <asm/ptrace.h>
11#include <asm/user.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13typedef unsigned long elf_greg_t;
14typedef unsigned long elf_freg_t[3];
15
Russell King4a5222c2006-11-09 14:07:52 +000016#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
17typedef elf_greg_t elf_gregset_t[ELF_NGREG];
18
19typedef struct user_fp elf_fpregset_t;
20#endif
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#define EM_ARM 40
23#define EF_ARM_APCS26 0x08
24#define EF_ARM_SOFT_FLOAT 0x200
25#define EF_ARM_EABI_MASK 0xFF000000
26
27#define R_ARM_NONE 0
28#define R_ARM_PC24 1
29#define R_ARM_ABS32 2
Daniel Jacobowitzc2e26112005-12-14 22:04:22 +000030#define R_ARM_CALL 28
31#define R_ARM_JUMP24 29
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 * These are used to set parameters in the core dumps.
35 */
36#define ELF_CLASS ELFCLASS32
37#ifdef __ARMEB__
Mike Frysinger718a30a2005-06-03 20:52:26 +010038#define ELF_DATA ELFDATA2MSB
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#else
Mike Frysinger718a30a2005-06-03 20:52:26 +010040#define ELF_DATA ELFDATA2LSB
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#endif
42#define ELF_ARCH EM_ARM
43
Russell King5974eaa2006-11-09 14:37:06 +000044#ifdef __KERNEL__
Russell King4a5222c2006-11-09 14:07:52 +000045#ifndef __ASSEMBLY__
46/*
Russell King4a5222c2006-11-09 14:07:52 +000047 * This yields a string that ld.so will use to load implementation
48 * specific libraries for optimization. This is more specific in
49 * intent than poking at uname or /proc/cpuinfo.
50 *
51 * For now we just provide a fairly general string that describes the
52 * processor family. This could be made more specific later if someone
53 * implemented optimisations that require it. 26-bit CPUs give you
54 * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
55 * supported). 32-bit CPUs give you "v3[lb]" for anything based on an
56 * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
57 * core.
58 */
59#define ELF_PLATFORM_SIZE 8
60#define ELF_PLATFORM (elf_platform)
61
62extern char elf_platform[];
63#endif
64
David Woodhouse6ff63402006-09-21 08:34:39 +010065/*
66 * This is used to ensure we don't load something for the wrong architecture.
67 */
Russell King4a5222c2006-11-09 14:07:52 +000068#define elf_check_arch(x) ((x)->e_machine == EM_ARM && ELF_PROC_OK(x))
69
70/*
71 * 32-bit code is always OK. Some cpus can do 26-bit, some can't.
72 */
73#define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
74
75#define ELF_THUMB_OK(x) \
76 ((elf_hwcap & HWCAP_THUMB && ((x)->e_entry & 1) == 1) || \
77 ((x)->e_entry & 3) == 0)
78
79#define ELF_26BIT_OK(x) \
80 ((elf_hwcap & HWCAP_26BIT && (x)->e_flags & EF_ARM_APCS26) || \
81 ((x)->e_flags & EF_ARM_APCS26) == 0)
David Woodhouse6ff63402006-09-21 08:34:39 +010082
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#define USE_ELF_CORE_DUMP
84#define ELF_EXEC_PAGESIZE 4096
85
86/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
87 use of this is to invoke "./ld.so someprog" to test out a new version of
88 the loader. We need to make sure that it is out of the way of the program
89 that it will "exec", and that there is sufficient room for the brk. */
90
91#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
92
93/* When the program starts, a1 contains a pointer to a function to be
94 registered with atexit, as per the SVR4 ABI. A value of 0 means we
95 have no such handler. */
96#define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098/*
Lennert Buytenhekafe4b252006-12-03 18:51:14 +010099 * Since the FPA coprocessor uses CP1 and CP2, and iWMMXt uses CP0
100 * and CP1, we only enable access to the iWMMXt coprocessor if the
101 * binary is EABI or softfloat (and thus, guaranteed not to use
102 * FPA instructions.)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 */
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100104#define SET_PERSONALITY(ex, ibcs2) \
105 do { \
106 if ((ex).e_flags & EF_ARM_APCS26) { \
107 set_personality(PER_LINUX); \
108 } else { \
109 set_personality(PER_LINUX_32BIT); \
110 if (elf_hwcap & HWCAP_IWMMXT && (ex).e_flags & (EF_ARM_EABI_MASK | EF_ARM_SOFT_FLOAT)) \
111 set_thread_flag(TIF_USING_IWMMXT); \
112 else \
113 clear_thread_flag(TIF_USING_IWMMXT); \
114 } \
115 } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117#endif
118
119#endif