include/asm-i386/ptrace.h

   1 #ifndef _I386_PTRACE_H
   2 #define _I386_PTRACE_H
   3
   4 #include <asm/ptrace-abi.h>
   5
   6 /* this struct defines the way the registers are stored on the
   7    stack during a system call. */
   8
   9 struct pt_regs {
  10         long ebx;
  11         long ecx;
  12         long edx;
  13         long esi;
  14         long edi;
  15         long ebp;
  16         long eax;
  17         int  xds;
  18         int  xes;
  19         long orig_eax;
  20         long eip;
  21         int  xcs;
  22         long eflags;
  23         long esp;
  24         int  xss;
  25 };
  26
  27 #ifdef __KERNEL__
  28
  29 #include <asm/vm86.h>
  30
  31 struct task_struct;
  32 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
  33
  34 /*
  35  * user_mode_vm(regs) determines whether a register set came from user mode.
  36  * This is true if V8086 mode was enabled OR if the register set was from
  37  * protected mode with RPL-3 CS value.  This tricky test checks that with
  38  * one comparison.  Many places in the kernel can bypass this full check
  39  * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
  40  */
  41 static inline int user_mode(struct pt_regs *regs)
  42 {
  43         return (regs->xcs & 3) != 0;
  44 }
  45 static inline int user_mode_vm(struct pt_regs *regs)
  46 {
  47         return ((regs->xcs & 3) | (regs->eflags & VM_MASK)) != 0;
  48 }
  49 #define instruction_pointer(regs) ((regs)->eip)
  50 #if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER)
  51 extern unsigned long profile_pc(struct pt_regs *regs);
  52 #else
  53 #define profile_pc(regs) instruction_pointer(regs)
  54 #endif
  55 #endif /* __KERNEL__ */
  56
  57 #endif