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
  69 extern char * elf_aux_platform;
  70 #define ELF_PLATFORM (elf_aux_platform)
  71
  72 extern unsigned long vsyscall_ehdr;
  73 extern unsigned long vsyscall_end;
  74 extern 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                                             \
  92 do {                                                            \
  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
 120 #define R_X86_64_NUM            16
 121
 122 /*
 123  * This is used to ensure we don't load something for the wrong architecture.
 124  */
 125 #define elf_check_arch(x) \
 126         ((x)->e_machine == EM_X86_64)
 127
 128 #define ELF_CLASS       ELFCLASS64
 129 #define ELF_DATA        ELFDATA2LSB
 130 #define ELF_ARCH        EM_X86_64
 131
 132 #define ELF_PLAT_INIT(regs, load_addr)    do { \
 133         PT_REGS_BX(regs) = 0; \
 134         PT_REGS_CX(regs) = 0; \
 135         PT_REGS_DX(regs) = 0; \
 136         PT_REGS_SI(regs) = 0; \
 137         PT_REGS_DI(regs) = 0; \
 138         PT_REGS_BP(regs) = 0; \
 139         PT_REGS_AX(regs) = 0; \
 140         PT_REGS_R8(regs) = 0; \
 141         PT_REGS_R9(regs) = 0; \
 142         PT_REGS_R10(regs) = 0; \
 143         PT_REGS_R11(regs) = 0; \
 144         PT_REGS_R12(regs) = 0; \
 145         PT_REGS_R13(regs) = 0; \
 146         PT_REGS_R14(regs) = 0; \
 147         PT_REGS_R15(regs) = 0; \
 148 } while (0)
 149
 150 #define ELF_CORE_COPY_REGS(pr_reg, _regs)               \
 151         (pr_reg)[0] = (_regs)->regs.gp[0];                      \
 152         (pr_reg)[1] = (_regs)->regs.gp[1];                      \
 153         (pr_reg)[2] = (_regs)->regs.gp[2];                      \
 154         (pr_reg)[3] = (_regs)->regs.gp[3];                      \
 155         (pr_reg)[4] = (_regs)->regs.gp[4];                      \
 156         (pr_reg)[5] = (_regs)->regs.gp[5];                      \
 157         (pr_reg)[6] = (_regs)->regs.gp[6];                      \
 158         (pr_reg)[7] = (_regs)->regs.gp[7];                      \
 159         (pr_reg)[8] = (_regs)->regs.gp[8];                      \
 160         (pr_reg)[9] = (_regs)->regs.gp[9];                      \
 161         (pr_reg)[10] = (_regs)->regs.gp[10];                    \
 162         (pr_reg)[11] = (_regs)->regs.gp[11];                    \
 163         (pr_reg)[12] = (_regs)->regs.gp[12];                    \
 164         (pr_reg)[13] = (_regs)->regs.gp[13];                    \
 165         (pr_reg)[14] = (_regs)->regs.gp[14];                    \
 166         (pr_reg)[15] = (_regs)->regs.gp[15];                    \
 167         (pr_reg)[16] = (_regs)->regs.gp[16];                    \
 168         (pr_reg)[17] = (_regs)->regs.gp[17];                    \
 169         (pr_reg)[18] = (_regs)->regs.gp[18];                    \
 170         (pr_reg)[19] = (_regs)->regs.gp[19];                    \
 171         (pr_reg)[20] = (_regs)->regs.gp[20];                    \
 172         (pr_reg)[21] = current->thread.arch.fs;                 \
 173         (pr_reg)[22] = 0;                                       \
 174         (pr_reg)[23] = 0;                                       \
 175         (pr_reg)[24] = 0;                                       \
 176         (pr_reg)[25] = 0;                                       \
 177         (pr_reg)[26] = 0;
 178
 179 #define ELF_PLATFORM "x86_64"
 180
 181 /* No user-accessible fixmap addresses, i.e. vsyscall */
 182 #define FIXADDR_USER_START      0
 183 #define FIXADDR_USER_END        0
 184
 185 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 186 struct linux_binprm;
 187 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 188         int uses_interp);
 189
 190 extern unsigned long um_vdso_addr;
 191 #define AT_SYSINFO_EHDR 33
 192 #define ARCH_DLINFO     NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
 193
 194 #endif
 195
 196 typedef unsigned long elf_greg_t;
 197
 198 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
 199 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 200
 201 typedef struct user_i387_struct elf_fpregset_t;
 202
 203 #define task_pt_regs(t) (&(t)->thread.regs)
 204
 205 struct task_struct;
 206
 207 extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
 208
 209 #define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
 210
 211 #define ELF_EXEC_PAGESIZE 4096
 212
 213 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
 214
 215 extern long elf_aux_hwcap;
 216 #define ELF_HWCAP (elf_aux_hwcap)
 217
 218 #define SET_PERSONALITY(ex) do ; while(0)
 219 #define __HAVE_ARCH_GATE_AREA 1
 220
 221 #endif