1#ifndef __ASMARM_ELF_H 2#define __ASMARM_ELF_H 3 4#ifndef __ASSEMBLY__ 5/* 6 * ELF register definitions.. 7 */ 8#include <asm/ptrace.h> 9#include <asm/user.h> 10 11typedef unsigned long elf_greg_t; 12typedef unsigned long elf_freg_t[3]; 13 14#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 20#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 28#define R_ARM_CALL 28 29#define R_ARM_JUMP24 29 30 31/* 32 * These are used to set parameters in the core dumps. 33 */ 34#define ELF_CLASS ELFCLASS32 35#ifdef __ARMEB__ 36#define ELF_DATA ELFDATA2MSB 37#else 38#define ELF_DATA ELFDATA2LSB 39#endif 40#define ELF_ARCH EM_ARM 41 42/* 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 55#define HWCAP_CRUNCH 1024 56 57#ifdef __KERNEL__ 58#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 85/* 86 * This is used to ensure we don't load something for the wrong architecture. 87 */ 88#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) 102 103#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 = 0 117 118/* 119 * 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.) 123 */ 124#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) 136 137#endif 138 139#endif 140