1/* 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5#ifndef __UM_ELF_I386_H 6#define __UM_ELF_I386_H 7 8#include <asm/user.h> 9#include "skas.h" 10 11#define R_386_NONE 0 12#define R_386_32 1 13#define R_386_PC32 2 14#define R_386_GOT32 3 15#define R_386_PLT32 4 16#define R_386_COPY 5 17#define R_386_GLOB_DAT 6 18#define R_386_JMP_SLOT 7 19#define R_386_RELATIVE 8 20#define R_386_GOTOFF 9 21#define R_386_GOTPC 10 22#define R_386_NUM 11 23 24typedef unsigned long elf_greg_t; 25 26#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t)) 27typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 28 29typedef struct user_i387_struct elf_fpregset_t; 30 31/* 32 * This is used to ensure we don't load something for the wrong architecture. 33 */ 34#define elf_check_arch(x) \ 35 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486)) 36 37#define ELF_CLASS ELFCLASS32 38#define ELF_DATA ELFDATA2LSB 39#define ELF_ARCH EM_386 40 41#define ELF_PLAT_INIT(regs, load_addr) do { \ 42 PT_REGS_EBX(regs) = 0; \ 43 PT_REGS_ECX(regs) = 0; \ 44 PT_REGS_EDX(regs) = 0; \ 45 PT_REGS_ESI(regs) = 0; \ 46 PT_REGS_EDI(regs) = 0; \ 47 PT_REGS_EBP(regs) = 0; \ 48 PT_REGS_EAX(regs) = 0; \ 49} while (0) 50 51#define USE_ELF_CORE_DUMP 52#define ELF_EXEC_PAGESIZE 4096 53 54#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3) 55 56/* Shamelessly stolen from include/asm-i386/elf.h */ 57 58#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \ 59 pr_reg[0] = PT_REGS_EBX(regs); \ 60 pr_reg[1] = PT_REGS_ECX(regs); \ 61 pr_reg[2] = PT_REGS_EDX(regs); \ 62 pr_reg[3] = PT_REGS_ESI(regs); \ 63 pr_reg[4] = PT_REGS_EDI(regs); \ 64 pr_reg[5] = PT_REGS_EBP(regs); \ 65 pr_reg[6] = PT_REGS_EAX(regs); \ 66 pr_reg[7] = PT_REGS_DS(regs); \ 67 pr_reg[8] = PT_REGS_ES(regs); \ 68 /* fake once used fs and gs selectors? */ \ 69 pr_reg[9] = PT_REGS_DS(regs); \ 70 pr_reg[10] = PT_REGS_DS(regs); \ 71 pr_reg[11] = PT_REGS_SYSCALL_NR(regs); \ 72 pr_reg[12] = PT_REGS_IP(regs); \ 73 pr_reg[13] = PT_REGS_CS(regs); \ 74 pr_reg[14] = PT_REGS_EFLAGS(regs); \ 75 pr_reg[15] = PT_REGS_SP(regs); \ 76 pr_reg[16] = PT_REGS_SS(regs); \ 77} while (0); 78 79extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu); 80 81#define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu) 82 83extern long elf_aux_hwcap; 84#define ELF_HWCAP (elf_aux_hwcap) 85 86extern char * elf_aux_platform; 87#define ELF_PLATFORM (elf_aux_platform) 88 89#define SET_PERSONALITY(ex) do { } while (0) 90 91extern unsigned long vsyscall_ehdr; 92extern unsigned long vsyscall_end; 93extern unsigned long __kernel_vsyscall; 94 95#define VSYSCALL_BASE vsyscall_ehdr 96#define VSYSCALL_END vsyscall_end 97 98/* 99 * This is the range that is readable by user mode, and things 100 * acting like user mode such as get_user_pages. 101 */ 102#define FIXADDR_USER_START VSYSCALL_BASE 103#define FIXADDR_USER_END VSYSCALL_END 104 105/* 106 * Architecture-neutral AT_ values in 0-17, leave some room 107 * for more of them, start the x86-specific ones at 32. 108 */ 109#define AT_SYSINFO 32 110#define AT_SYSINFO_EHDR 33 111 112#define ARCH_DLINFO \ 113do { \ 114 if ( vsyscall_ehdr ) { \ 115 NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall); \ 116 NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr); \ 117 } \ 118} while (0) 119 120/* 121 * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out 122 * extra segments containing the vsyscall DSO contents. Dumping its 123 * contents makes post-mortem fully interpretable later without matching up 124 * the same kernel and hardware config to see what PC values meant. 125 * Dumping its extra ELF program headers includes all the other information 126 * a debugger needs to easily find how the vsyscall DSO was being used. 127 */ 128#define ELF_CORE_EXTRA_PHDRS \ 129 (vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 ) 130 131#define ELF_CORE_WRITE_EXTRA_PHDRS \ 132if ( vsyscall_ehdr ) { \ 133 const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; \ 134 const struct elf_phdr *const phdrp = \ 135 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); \ 136 int i; \ 137 Elf32_Off ofs = 0; \ 138 for (i = 0; i < ehdrp->e_phnum; ++i) { \ 139 struct elf_phdr phdr = phdrp[i]; \ 140 if (phdr.p_type == PT_LOAD) { \ 141 ofs = phdr.p_offset = offset; \ 142 offset += phdr.p_filesz; \ 143 } \ 144 else \ 145 phdr.p_offset += ofs; \ 146 phdr.p_paddr = 0; /* match other core phdrs */ \ 147 DUMP_WRITE(&phdr, sizeof(phdr)); \ 148 } \ 149} 150#define ELF_CORE_WRITE_EXTRA_DATA \ 151if ( vsyscall_ehdr ) { \ 152 const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; \ 153 const struct elf_phdr *const phdrp = \ 154 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); \ 155 int i; \ 156 for (i = 0; i < ehdrp->e_phnum; ++i) { \ 157 if (phdrp[i].p_type == PT_LOAD) \ 158 DUMP_WRITE((void *) phdrp[i].p_vaddr, \ 159 phdrp[i].p_filesz); \ 160 } \ 161} 162 163#endif 164