1#ifndef __ASM_ALPHA_ELF_H 2#define __ASM_ALPHA_ELF_H 3 4/* 5 * ELF register definitions.. 6 */ 7 8/* 9 * The OSF/1 version of <sys/procfs.h> makes gregset_t 46 entries long. 10 * I have no idea why that is so. For now, we just leave it at 33 11 * (32 general regs + processor status word). 12 */ 13#define ELF_NGREG 33 14#define ELF_NFPREG 32 15 16typedef unsigned long elf_greg_t; 17typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 18 19typedef double elf_fpreg_t; 20typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 21 22/* 23 * This is used to ensure we don't load something for the wrong architecture. 24 */ 25#define elf_check_arch(x) ((x)->e_machine == EM_ALPHA) 26 27/* 28 * These are used to set parameters in the core dumps. 29 */ 30#define ELF_CLASS ELFCLASS64 31#define ELF_DATA ELFDATA2LSB 32#define ELF_ARCH EM_ALPHA 33 34#define USE_ELF_CORE_DUMP 35#define ELF_EXEC_PAGESIZE 8192 36 37/* This is the location that an ET_DYN program is loaded if exec'ed. Typical 38 use of this is to invoke "./ld.so someprog" to test out a new version of 39 the loader. We need to make sure that it is out of the way of the program 40 that it will "exec", and that there is sufficient room for the brk. */ 41 42#define ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) 43 44/* $0 is set by ld.so to a pointer to a function which might be 45 registered using atexit. This provides a mean for the dynamic 46 linker to call DT_FINI functions for shared libraries that have 47 been loaded before the code runs. 48 49 So that we can use the same startup file with static executables, 50 we start programs with a value of 0 to indicate that there is no 51 such function. */ 52 53#define ELF_PLAT_INIT(_r) _r->r0 = 0 54 55/* Use the same format as the OSF/1 procfs interface. The register 56 layout is sane. However, since dump_thread() creates the funky 57 layout that ECOFF coredumps want, we need to undo that layout here. 58 Eventually, it would be nice if the ECOFF core-dump had to do the 59 translation, then ELF_CORE_COPY_REGS() would become trivial and 60 faster. */ 61#define ELF_CORE_COPY_REGS(_dest,_regs) \ 62{ \ 63 struct user _dump; \ 64 \ 65 dump_thread(_regs, &_dump); \ 66 _dest[ 0] = _dump.regs[EF_V0]; \ 67 _dest[ 1] = _dump.regs[EF_T0]; \ 68 _dest[ 2] = _dump.regs[EF_T1]; \ 69 _dest[ 3] = _dump.regs[EF_T2]; \ 70 _dest[ 4] = _dump.regs[EF_T3]; \ 71 _dest[ 5] = _dump.regs[EF_T4]; \ 72 _dest[ 6] = _dump.regs[EF_T5]; \ 73 _dest[ 7] = _dump.regs[EF_T6]; \ 74 _dest[ 8] = _dump.regs[EF_T7]; \ 75 _dest[ 9] = _dump.regs[EF_S0]; \ 76 _dest[10] = _dump.regs[EF_S1]; \ 77 _dest[11] = _dump.regs[EF_S2]; \ 78 _dest[12] = _dump.regs[EF_S3]; \ 79 _dest[13] = _dump.regs[EF_S4]; \ 80 _dest[14] = _dump.regs[EF_S5]; \ 81 _dest[15] = _dump.regs[EF_S6]; \ 82 _dest[16] = _dump.regs[EF_A0]; \ 83 _dest[17] = _dump.regs[EF_A1]; \ 84 _dest[18] = _dump.regs[EF_A2]; \ 85 _dest[19] = _dump.regs[EF_A3]; \ 86 _dest[20] = _dump.regs[EF_A4]; \ 87 _dest[21] = _dump.regs[EF_A5]; \ 88 _dest[22] = _dump.regs[EF_T8]; \ 89 _dest[23] = _dump.regs[EF_T9]; \ 90 _dest[24] = _dump.regs[EF_T10]; \ 91 _dest[25] = _dump.regs[EF_T11]; \ 92 _dest[26] = _dump.regs[EF_RA]; \ 93 _dest[27] = _dump.regs[EF_T12]; \ 94 _dest[28] = _dump.regs[EF_AT]; \ 95 _dest[29] = _dump.regs[EF_GP]; \ 96 _dest[30] = _dump.regs[EF_SP]; \ 97 _dest[31] = _dump.regs[EF_PC]; /* store PC here */ \ 98 _dest[32] = _dump.regs[EF_PS]; \ 99} 100 101/* This yields a mask that user programs can use to figure out what 102 instruction set this CPU supports. This is trivial on Alpha, 103 but not so on other machines. */ 104 105#define ELF_HWCAP \ 106({ \ 107 /* Sadly, most folks don't yet have assemblers that know about \ 108 amask. This is "amask v0, v0" */ \ 109 register long _v0 __asm("$0") = -1; \ 110 __asm(".long 0x47e00c20" : "=r"(_v0) : "0"(_v0)); \ 111 ~_v0; \ 112}) 113 114/* This yields a string that ld.so will use to load implementation 115 specific libraries for optimization. This is more specific in 116 intent than poking at uname or /proc/cpuinfo. 117 118 This might do with checking bwx simultaneously... */ 119 120#define ELF_PLATFORM \ 121({ \ 122 /* Or "implver v0" ... */ \ 123 register long _v0 __asm("$0"); \ 124 __asm(".long 0x47e03d80" : "=r"(_v0)); \ 125 _v0 == 0 ? "ev4" : "ev5"; \ 126}) 127 128#ifdef __KERNEL__ 129#define SET_PERSONALITY(EX, IBCS2) \ 130 set_personality(((EX).e_flags & EF_ALPHA_32BIT) \ 131 ? PER_LINUX_32BIT : (IBCS2) ? PER_SVR4 : PER_LINUX) 132#endif 133 134#endif 135