arch/i386-pc/exec/traps.h

   1 #ifndef _TRAPS_H
   2 #define _TRAPS_H
   3
   4 #include <asm/irq.h>
   5 #include <asm/linkage.h>
   6
   7 /* Here are some macros used to build trap table in core file. */
   8
   9 #define TRAP_NAME2(nr) nr##_trap(void)
  10 #define TRAP_NAME(nr) TRAP_NAME2(TRAP##nr)
  11
  12 #    define _stringify(x) #x
  13 #    define stringify(x) _stringify(x)
  14
  15 #define BUILD_COMMON_TRAP() \
  16 __asm__( \
  17         "\n"__ALIGN_STR"\n" \
  18         "common_trap:\n\t" \
  19         SAVE_REGS \
  20         "call "SYMBOL_NAME_STR(printException)"\n\t" \
  21         RESTORE_REGS \
  22         "popl %eax\n\t" \
  23         "movl 12(%esp),%esp\n\t"  /* Get and use user stack */ \
  24         "pushl %eax\n\t"   /* Exception number */ \
  25         "pushl $0\n\t"     /* "Return address" */ \
  26         "movl %esp,%ebx\n\t"   /* Hold the esp value before pushing! */ \
  27         "pushl $" stringify(USER_DS) "\n\t"    /* User SS */ \
  28         "pushl %ebx\n\t"       /* Stack frame */ \
  29         "pushl $0x3002\n\t"     /* IOPL:3 */ \
  30         "pushl $" stringify(USER_CS) "\n\t" \
  31         "pushl $" SYMBOL_NAME_STR(handleException) "\n\t" \
  32         "iret\n");
  33
  34 #define BUILD_TRAP(nr)                       \
  35 asmlinkage void TRAP_NAME(nr);               \
  36 __asm__(                                    \
  37         "\n"__ALIGN_STR"\n"                 \
  38 SYMBOL_NAME_STR(TRAP) #nr "_trap:\n\t"  \
  39         "pushl $"#nr"\n\t"                  \
  40         "jmp common_trap");
  41
  42 void set_intr_gate(unsigned int n, void *addr);
  43 void set_system_gate(unsigned int n, void *addr);
  44
  45 void Init_Traps(void);
  46
  47 #endif /* _TRAPS_H */