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         int  xfs;
  20         /* int  xgs; */
  21         long orig_eax;
  22         long eip;
  23         int  xcs;
  24         long eflags;
  25         long esp;
  26         int  xss;
  27 };
  28
  29 #ifdef __KERNEL__
  30
  31 #include <asm/vm86.h>
  32 #include <asm/segment.h>
  33
  34 struct task_struct;
  35 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
  36
  37 /*
  38  * user_mode_vm(regs) determines whether a register set came from user mode.
  39  * This is true if V8086 mode was enabled OR if the register set was from
  40  * protected mode with RPL-3 CS value.  This tricky test checks that with
  41  * one comparison.  Many places in the kernel can bypass this full check
  42  * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
  43  */
  44 static inline int user_mode(struct pt_regs *regs)
  45 {
  46         return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
  47 }
  48 static inline int user_mode_vm(struct pt_regs *regs)
  49 {
  50         return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
  51 }
  52 static inline int v8086_mode(struct pt_regs *regs)
  53 {
  54         return (regs->eflags & VM_MASK);
  55 }
  56
  57 #define instruction_pointer(regs) ((regs)->eip)
  58 #define regs_return_value(regs) ((regs)->eax)
  59
  60 extern unsigned long profile_pc(struct pt_regs *regs);
  61 #endif /* __KERNEL__ */
  62
  63 #endif