blob: bdbc894339b470b55fa6ed7848602bd8e5f4a071 [file] [log] [blame]
#ifndef _I386_PTRACE_H
#define _I386_PTRACE_H
#include <asm/ptrace-abi.h>
/* this struct defines the way the registers are stored on the
stack during a system call. */
struct pt_regs {
long ebx;
long ecx;
long edx;
long esi;
long edi;
long ebp;
long eax;
int xds;
int xes;
/* int xfs; */
int xgs;
long orig_eax;
long eip;
int xcs;
long eflags;
long esp;
int xss;
#ifdef __KERNEL__
#include <asm/vm86.h>
#include <asm/segment.h>
struct task_struct;
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
* user_mode_vm(regs) determines whether a register set came from user mode.
* This is true if V8086 mode was enabled OR if the register set was from
* protected mode with RPL-3 CS value. This tricky test checks that with
* one comparison. Many places in the kernel can bypass this full check
* if they have already ruled out V8086 mode, so user_mode(regs) can be used.
static inline int user_mode(struct pt_regs *regs)
return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
static inline int user_mode_vm(struct pt_regs *regs)
return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
#define instruction_pointer(regs) ((regs)->eip)
#define regs_return_value(regs) ((regs)->eax)
extern unsigned long profile_pc(struct pt_regs *regs);
#endif /* __KERNEL__ */