1#ifndef __ASMi386_ELF_H 2#define __ASMi386_ELF_H 3 4/* 5 * ELF register definitions.. 6 */ 7 8#include <asm/ptrace.h> 9#include <asm/user.h> 10 11#include <linux/utsname.h> 12 13typedef unsigned long elf_greg_t; 14 15#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t)) 16typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 17 18typedef struct user_i387_struct elf_fpregset_t; 19typedef struct user_fxsr_struct elf_fpxregset_t; 20 21/* 22 * This is used to ensure we don't load something for the wrong architecture. 23 */ 24#define elf_check_arch(x) \ 25 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486)) 26 27/* 28 * These are used to set parameters in the core dumps. 29 */ 30#define ELF_CLASS ELFCLASS32 31#define ELF_DATA ELFDATA2LSB 32#define ELF_ARCH EM_386 33 34/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx 35 contains a pointer to a function which might be registered using `atexit'. 36 This provides a mean for the dynamic linker to call DT_FINI functions for 37 shared libraries that have been loaded before the code runs. 38 39 A value of 0 tells we have no such handler. 40 41 We might as well make sure everything else is cleared too (except for %esp), 42 just to make things more deterministic. 43 */ 44#define ELF_PLAT_INIT(_r) do { \ 45 _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \ 46 _r->esi = 0; _r->edi = 0; _r->ebp = 0; \ 47 _r->eax = 0; \ 48} while (0) 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 (TASK_SIZE / 3 * 2) 59 60/* Wow, the "main" arch needs arch dependent functions too.. :) */ 61 62/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is 63 now struct_user_regs, they are different) */ 64 65#define ELF_CORE_COPY_REGS(pr_reg, regs) \ 66 pr_reg[0] = regs->ebx; \ 67 pr_reg[1] = regs->ecx; \ 68 pr_reg[2] = regs->edx; \ 69 pr_reg[3] = regs->esi; \ 70 pr_reg[4] = regs->edi; \ 71 pr_reg[5] = regs->ebp; \ 72 pr_reg[6] = regs->eax; \ 73 pr_reg[7] = regs->xds; \ 74 pr_reg[8] = regs->xes; \ 75 /* fake once used fs and gs selectors? */ \ 76 pr_reg[9] = regs->xds; /* was fs and __fs */ \ 77 pr_reg[10] = regs->xds; /* was gs and __gs */ \ 78 pr_reg[11] = regs->orig_eax; \ 79 pr_reg[12] = regs->eip; \ 80 pr_reg[13] = regs->xcs; \ 81 pr_reg[14] = regs->eflags; \ 82 pr_reg[15] = regs->esp; \ 83 pr_reg[16] = regs->xss; 84 85/* This yields a mask that user programs can use to figure out what 86 instruction set this CPU supports. This could be done in user space, 87 but it's not easy, and we've already done it here. */ 88 89#define ELF_HWCAP (boot_cpu_data.x86_capability[0]) 90 91/* This yields a string that ld.so will use to load implementation 92 specific libraries for optimization. This is more specific in 93 intent than poking at uname or /proc/cpuinfo. 94 95 For the moment, we have only optimizations for the Intel generations, 96 but that could change... */ 97 98#define ELF_PLATFORM (system_utsname.machine) 99 100#ifdef __KERNEL__ 101#define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX) 102#endif 103 104#endif 105