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
  24 typedef unsigned long elf_greg_t;
  25
  26 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
  27 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  28
  29 typedef 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
  79 static 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
  88 extern long elf_aux_hwcap;
  89 #define ELF_HWCAP (elf_aux_hwcap)
  90
  91 extern char * elf_aux_platform;
  92 #define ELF_PLATFORM (elf_aux_platform)
  93
  94 #define SET_PERSONALITY(ex, ibcs2) do ; while(0)
  95
  96 extern unsigned long vsyscall_ehdr;
  97 extern unsigned long vsyscall_end;
  98 extern 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                                             \
 118 do {                                                            \
 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                                            \
 137 if ( 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                                             \
 156 if ( 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  */