1 #ifndef __ASMARM_ELF_H 2 #define __ASMARM_ELF_H 3 4 5 /* 6 * ELF register definitions.. 7 */ 8 9 #include <asm/ptrace.h> 10 #include <asm/user.h> 11 #ifdef __KERNEL 12 #include <asm/procinfo.h> 13 #endif 14 15 typedef unsigned long elf_greg_t; 16 typedef unsigned long elf_freg_t[3]; 17 18 #define EM_ARM 40 19 #define EF_ARM_APCS26 0x08 20 #define EF_ARM_SOFT_FLOAT 0x200 21 #define EF_ARM_EABI_MASK 0xFF000000 22 23 #define R_ARM_NONE 0 24 #define R_ARM_PC24 1 25 #define R_ARM_ABS32 2 26 #define R_ARM_CALL 28 27 #define R_ARM_JUMP24 29 28 29 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t)) 30 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 31 32 typedef struct user_fp elf_fpregset_t; 33 34 /* 35 * This is used to ensure we don't load something for the wrong architecture. 36 */ 37 #define elf_check_arch(x) ( ((x)->e_machine == EM_ARM) && (ELF_PROC_OK((x))) ) 38 39 /* 40 * These are used to set parameters in the core dumps. 41 */ 42 #define ELF_CLASS ELFCLASS32 43 #ifdef __ARMEB__ 44 #define ELF_DATA ELFDATA2MSB 45 #else 46 #define ELF_DATA ELFDATA2LSB 47 #endif 48 #define ELF_ARCH EM_ARM 49 50 #define USE_ELF_CORE_DUMP 51 #define ELF_EXEC_PAGESIZE 4096 52 53 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 54 use of this is to invoke "./ld.so someprog" to test out a new version of 55 the loader. We need to make sure that it is out of the way of the program 56 that it will "exec", and that there is sufficient room for the brk. */ 57 58 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3) 59 60 /* When the program starts, a1 contains a pointer to a function to be 61 registered with atexit, as per the SVR4 ABI. A value of 0 means we 62 have no such handler. */ 63 #define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0 64 65 /* This yields a mask that user programs can use to figure out what 66 instruction set this cpu supports. */ 67 68 #define ELF_HWCAP (elf_hwcap) 69 70 /* This yields a string that ld.so will use to load implementation 71 specific libraries for optimization. This is more specific in 72 intent than poking at uname or /proc/cpuinfo. */ 73 74 /* For now we just provide a fairly general string that describes the 75 processor family. This could be made more specific later if someone 76 implemented optimisations that require it. 26-bit CPUs give you 77 "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't 78 supported). 32-bit CPUs give you "v3[lb]" for anything based on an 79 ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1 80 core. */ 81 82 #define ELF_PLATFORM_SIZE 8 83 extern char elf_platform[]; 84 #define ELF_PLATFORM (elf_platform) 85 86 #ifdef __KERNEL__ 87 88 /* 89 * 32-bit code is always OK. Some cpus can do 26-bit, some can't. 90 */ 91 #define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x)) 92 93 #define ELF_THUMB_OK(x) \ 94 (( (elf_hwcap & HWCAP_THUMB) && ((x)->e_entry & 1) == 1) || \ 95 ((x)->e_entry & 3) == 0) 96 97 #define ELF_26BIT_OK(x) \ 98 (( (elf_hwcap & HWCAP_26BIT) && (x)->e_flags & EF_ARM_APCS26) || \ 99 ((x)->e_flags & EF_ARM_APCS26) == 0) 100 101 #ifndef CONFIG_IWMMXT 102 103 /* Old NetWinder binaries were compiled in such a way that the iBCS 104 heuristic always trips on them. Until these binaries become uncommon 105 enough not to care, don't trust the `ibcs' flag here. In any case 106 there is no other ELF system currently supported by iBCS. 107 @@ Could print a warning message to encourage users to upgrade. */ 108 #define SET_PERSONALITY(ex,ibcs2) \ 109 set_personality(((ex).e_flags&EF_ARM_APCS26 ?PER_LINUX :PER_LINUX_32BIT)) 110 111 #else 112 113 /* 114 * All iWMMXt capable CPUs don't support 26-bit mode. Yet they can run 115 * legacy binaries which used to contain FPA11 floating point instructions 116 * that have always been emulated by the kernel. PFA11 and iWMMXt overlap 117 * on coprocessor 1 space though. We therefore must decide if given task 118 * is allowed to use CP 0 and 1 for iWMMXt, or if they should be blocked 119 * at all times for the prefetch exception handler to catch FPA11 opcodes 120 * and emulate them. The best indication to discriminate those two cases 121 * is the SOFT_FLOAT flag in the ELF header. 122 */ 123 124 #define SET_PERSONALITY(ex,ibcs2) \ 125 do { \ 126 set_personality(PER_LINUX_32BIT); \ 127 if (((ex).e_flags & EF_ARM_EABI_MASK) || \ 128 ((ex).e_flags & EF_ARM_SOFT_FLOAT)) \ 129 set_thread_flag(TIF_USING_IWMMXT); \ 130 else \ 131 clear_thread_flag(TIF_USING_IWMMXT); \ 132 } while (0) 133 134 #endif 135 136 struct task_struct; 137 138 extern int dump_task_regs (struct task_struct *, elf_gregset_t *); 139 140 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) 141 142 143 #endif 144 145 #endif 146
