LXR linux/arch/x86/um/asm/elf.h

   1/*
   2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3 * Licensed under the GPL
   4 */
   5#ifndef __UM_ELF_X86_H
   6#define __UM_ELF_X86_H
   7
   8#include <asm/user.h>
   9#include <skas.h>
  10
  11#ifdef CONFIG_X86_32
  12
  13#define R_386_NONE      0
  14#define R_386_32        1
  15#define R_386_PC32      2
  16#define R_386_GOT32     3
  17#define R_386_PLT32     4
  18#define R_386_COPY      5
  19#define R_386_GLOB_DAT  6
  20#define R_386_JMP_SLOT  7
  21#define R_386_RELATIVE  8
  22#define R_386_GOTOFF    9
  23#define R_386_GOTPC     10
  24#define R_386_NUM       11
  25
  26/*
  27 * This is used to ensure we don't load something for the wrong architecture.
  28 */
  29#define elf_check_arch(x) \
  30        (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
  31
  32#define ELF_CLASS       ELFCLASS32
  33#define ELF_DATA        ELFDATA2LSB
  34#define ELF_ARCH        EM_386
  35
  36#define ELF_PLAT_INIT(regs, load_addr) do { \
  37        PT_REGS_BX(regs) = 0; \
  38        PT_REGS_CX(regs) = 0; \
  39        PT_REGS_DX(regs) = 0; \
  40        PT_REGS_SI(regs) = 0; \
  41        PT_REGS_DI(regs) = 0; \
  42        PT_REGS_BP(regs) = 0; \
  43        PT_REGS_AX(regs) = 0; \
  44} while (0)
  45
  46/* Shamelessly stolen from include/asm-i386/elf.h */
  47
  48#define ELF_CORE_COPY_REGS(pr_reg, regs) do {   \
  49        pr_reg[0] = PT_REGS_BX(regs);           \
  50        pr_reg[1] = PT_REGS_CX(regs);           \
  51        pr_reg[2] = PT_REGS_DX(regs);           \
  52        pr_reg[3] = PT_REGS_SI(regs);           \
  53        pr_reg[4] = PT_REGS_DI(regs);           \
  54        pr_reg[5] = PT_REGS_BP(regs);           \
  55        pr_reg[6] = PT_REGS_AX(regs);           \
  56        pr_reg[7] = PT_REGS_DS(regs);           \
  57        pr_reg[8] = PT_REGS_ES(regs);           \
  58        /* fake once used fs and gs selectors? */       \
  59        pr_reg[9] = PT_REGS_DS(regs);           \
  60        pr_reg[10] = PT_REGS_DS(regs);          \
  61        pr_reg[11] = PT_REGS_SYSCALL_NR(regs);  \
  62        pr_reg[12] = PT_REGS_IP(regs);          \
  63        pr_reg[13] = PT_REGS_CS(regs);          \
  64        pr_reg[14] = PT_REGS_EFLAGS(regs);      \
  65        pr_reg[15] = PT_REGS_SP(regs);          \
  66        pr_reg[16] = PT_REGS_SS(regs);          \
  67} while (0);
  68
  69extern char * elf_aux_platform;
  70#define ELF_PLATFORM (elf_aux_platform)
  71
  72extern unsigned long vsyscall_ehdr;
  73extern unsigned long vsyscall_end;
  74extern unsigned long __kernel_vsyscall;
  75
  76/*
  77 * This is the range that is readable by user mode, and things
  78 * acting like user mode such as get_user_pages.
  79 */
  80#define FIXADDR_USER_START      vsyscall_ehdr
  81#define FIXADDR_USER_END        vsyscall_end
  82
  83
  84/*
  85 * Architecture-neutral AT_ values in 0-17, leave some room
  86 * for more of them, start the x86-specific ones at 32.
  87 */
  88#define AT_SYSINFO              32
  89#define AT_SYSINFO_EHDR         33
  90
  91#define ARCH_DLINFO                                             \
  92do {                                                            \
  93        if ( vsyscall_ehdr ) {                                  \
  94                NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall);     \
  95                NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr);    \
  96        }                                                       \
  97} while (0)
  98
  99#else
 100
 101/* x86-64 relocation types, taken from asm-x86_64/elf.h */
 102#define R_X86_64_NONE           0       /* No reloc */
 103#define R_X86_64_64             1       /* Direct 64 bit  */
 104#define R_X86_64_PC32           2       /* PC relative 32 bit signed */
 105#define R_X86_64_GOT32          3       /* 32 bit GOT entry */
 106#define R_X86_64_PLT32          4       /* 32 bit PLT address */
 107#define R_X86_64_COPY           5       /* Copy symbol at runtime */
 108#define R_X86_64_GLOB_DAT       6       /* Create GOT entry */
 109#define R_X86_64_JUMP_SLOT      7       /* Create PLT entry */
 110#define R_X86_64_RELATIVE       8       /* Adjust by program base */
 111#define R_X86_64_GOTPCREL       9       /* 32 bit signed pc relative
 112                                           offset to GOT */
 113#define R_X86_64_32             10      /* Direct 32 bit zero extended */
 114#define R_X86_64_32S            11      /* Direct 32 bit sign extended */
 115#define R_X86_64_16             12      /* Direct 16 bit zero extended */
 116#define R_X86_64_PC16           13      /* 16 bit sign extended pc relative */
 117#define R_X86_64_8              14      /* Direct 8 bit sign extended  */
 118#define R_X86_64_PC8            15      /* 8 bit sign extended pc relative */
 119#define R_X86_64_PC64           24      /* Place relative 64-bit signed */
 120
 121/*
 122 * This is used to ensure we don't load something for the wrong architecture.
 123 */
 124#define elf_check_arch(x) \
 125        ((x)->e_machine == EM_X86_64)
 126
 127#define ELF_CLASS       ELFCLASS64
 128#define ELF_DATA        ELFDATA2LSB
 129#define ELF_ARCH        EM_X86_64
 130
 131#define ELF_PLAT_INIT(regs, load_addr)    do { \
 132        PT_REGS_BX(regs) = 0; \
 133        PT_REGS_CX(regs) = 0; \
 134        PT_REGS_DX(regs) = 0; \
 135        PT_REGS_SI(regs) = 0; \
 136        PT_REGS_DI(regs) = 0; \
 137        PT_REGS_BP(regs) = 0; \
 138        PT_REGS_AX(regs) = 0; \
 139        PT_REGS_R8(regs) = 0; \
 140        PT_REGS_R9(regs) = 0; \
 141        PT_REGS_R10(regs) = 0; \
 142        PT_REGS_R11(regs) = 0; \
 143        PT_REGS_R12(regs) = 0; \
 144        PT_REGS_R13(regs) = 0; \
 145        PT_REGS_R14(regs) = 0; \
 146        PT_REGS_R15(regs) = 0; \
 147} while (0)
 148
 149#define ELF_CORE_COPY_REGS(pr_reg, _regs)               \
 150        (pr_reg)[0] = (_regs)->regs.gp[0];                      \
 151        (pr_reg)[1] = (_regs)->regs.gp[1];                      \
 152        (pr_reg)[2] = (_regs)->regs.gp[2];                      \
 153        (pr_reg)[3] = (_regs)->regs.gp[3];                      \
 154        (pr_reg)[4] = (_regs)->regs.gp[4];                      \
 155        (pr_reg)[5] = (_regs)->regs.gp[5];                      \
 156        (pr_reg)[6] = (_regs)->regs.gp[6];                      \
 157        (pr_reg)[7] = (_regs)->regs.gp[7];                      \
 158        (pr_reg)[8] = (_regs)->regs.gp[8];                      \
 159        (pr_reg)[9] = (_regs)->regs.gp[9];                      \
 160        (pr_reg)[10] = (_regs)->regs.gp[10];                    \
 161        (pr_reg)[11] = (_regs)->regs.gp[11];                    \
 162        (pr_reg)[12] = (_regs)->regs.gp[12];                    \
 163        (pr_reg)[13] = (_regs)->regs.gp[13];                    \
 164        (pr_reg)[14] = (_regs)->regs.gp[14];                    \
 165        (pr_reg)[15] = (_regs)->regs.gp[15];                    \
 166        (pr_reg)[16] = (_regs)->regs.gp[16];                    \
 167        (pr_reg)[17] = (_regs)->regs.gp[17];                    \
 168        (pr_reg)[18] = (_regs)->regs.gp[18];                    \
 169        (pr_reg)[19] = (_regs)->regs.gp[19];                    \
 170        (pr_reg)[20] = (_regs)->regs.gp[20];                    \
 171        (pr_reg)[21] = current->thread.arch.fs;                 \
 172        (pr_reg)[22] = 0;                                       \
 173        (pr_reg)[23] = 0;                                       \
 174        (pr_reg)[24] = 0;                                       \
 175        (pr_reg)[25] = 0;                                       \
 176        (pr_reg)[26] = 0;
 177
 178#define ELF_PLATFORM "x86_64"
 179
 180/* No user-accessible fixmap addresses, i.e. vsyscall */
 181#define FIXADDR_USER_START      0
 182#define FIXADDR_USER_END        0
 183
 184#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 185struct linux_binprm;
 186extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 187        int uses_interp);
 188
 189extern unsigned long um_vdso_addr;
 190#define AT_SYSINFO_EHDR 33
 191#define ARCH_DLINFO     NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
 192
 193#endif
 194
 195typedef unsigned long elf_greg_t;
 196
 197#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
 198typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 199
 200typedef struct user_i387_struct elf_fpregset_t;
 201
 202struct task_struct;
 203
 204extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
 205
 206#define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
 207
 208#define ELF_EXEC_PAGESIZE 4096
 209
 210#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
 211
 212extern long elf_aux_hwcap;
 213#define ELF_HWCAP (elf_aux_hwcap)
 214
 215#define SET_PERSONALITY(ex) do {} while(0)
 216
 217#endif
 218