LXR linux/include/asm-um/elf-i386.h

   1/*
   2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
   3 * Licensed under the GPL
   4 */
   5#ifndef __UM_ELF_I386_H
   6#define __UM_ELF_I386_H
   7
   8#include <linux/sched.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
  79static inline int elf_core_copy_fpregs(struct task_struct *t,
  80                                       elf_fpregset_t *fpu)
  81{
  82        int cpu = ((struct thread_info *) t->stack)->cpu;
  83        return save_fp_registers(userspace_pid[cpu], (unsigned long *) fpu);
  84}
  85
  86#define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
  87
  88extern long elf_aux_hwcap;
  89#define ELF_HWCAP (elf_aux_hwcap)
  90
  91extern char * elf_aux_platform;
  92#define ELF_PLATFORM (elf_aux_platform)
  93
  94#define SET_PERSONALITY(ex, ibcs2) do ; while(0)
  95
  96extern unsigned long vsyscall_ehdr;
  97extern unsigned long vsyscall_end;
  98extern unsigned long __kernel_vsyscall;
  99
 100#define VSYSCALL_BASE vsyscall_ehdr
 101#define VSYSCALL_END vsyscall_end
 102
 103/*
 104 * This is the range that is readable by user mode, and things
 105 * acting like user mode such as get_user_pages.
 106 */
 107#define FIXADDR_USER_START      VSYSCALL_BASE
 108#define FIXADDR_USER_END        VSYSCALL_END
 109
 110/*
 111 * Architecture-neutral AT_ values in 0-17, leave some room
 112 * for more of them, start the x86-specific ones at 32.
 113 */
 114#define AT_SYSINFO              32
 115#define AT_SYSINFO_EHDR         33
 116
 117#define ARCH_DLINFO                                             \
 118do {                                                            \
 119        if ( vsyscall_ehdr ) {                                  \
 120                NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall);     \
 121                NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr);    \
 122        }                                                       \
 123} while (0)
 124
 125/*
 126 * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
 127 * extra segments containing the vsyscall DSO contents.  Dumping its
 128 * contents makes post-mortem fully interpretable later without matching up
 129 * the same kernel and hardware config to see what PC values meant.
 130 * Dumping its extra ELF program headers includes all the other information
 131 * a debugger needs to easily find how the vsyscall DSO was being used.
 132 */
 133#define ELF_CORE_EXTRA_PHDRS                                                  \
 134        (vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 )
 135
 136#define ELF_CORE_WRITE_EXTRA_PHDRS                                            \
 137if ( vsyscall_ehdr ) {                                                        \
 138        const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
 139        const struct elf_phdr *const phdrp =                                  \
 140                (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
 141        int i;                                                                \
 142        Elf32_Off ofs = 0;                                                    \
 143        for (i = 0; i < ehdrp->e_phnum; ++i) {                                \
 144                struct elf_phdr phdr = phdrp[i];                              \
 145                if (phdr.p_type == PT_LOAD) {                                 \
 146                        ofs = phdr.p_offset = offset;                         \
 147                        offset += phdr.p_filesz;                              \
 148                }                                                             \
 149                else                                                          \
 150                        phdr.p_offset += ofs;                                 \
 151                phdr.p_paddr = 0; /* match other core phdrs */                \
 152                DUMP_WRITE(&phdr, sizeof(phdr));                              \
 153        }                                                                     \
 154}
 155#define ELF_CORE_WRITE_EXTRA_DATA                                             \
 156if ( vsyscall_ehdr ) {                                                        \
 157        const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
 158        const struct elf_phdr *const phdrp =                                  \
 159                (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
 160        int i;                                                                \
 161        for (i = 0; i < ehdrp->e_phnum; ++i) {                                \
 162                if (phdrp[i].p_type == PT_LOAD)                               \
 163                        DUMP_WRITE((void *) phdrp[i].p_vaddr,                 \
 164                                   phdrp[i].p_filesz);                        \
 165        }                                                                     \
 166}
 167
 168#endif
 169
 170/*
 171 * Overrides for Emacs so that we follow Linus's tabbing style.
 172 * Emacs will notice this stuff at the end of the file and automatically
 173 * adjust the settings for this buffer only.  This must remain at the end
 174 * of the file.
 175 * ---------------------------------------------------------------------------
 176 * Local variables:
 177 * c-file-style: "linux"
 178 * End:
 179 */
 180