mirror of https://gitee.com/openkylin/linux.git
115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
|
|
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
|
|
*/
|
|
#ifndef _ASM_PTRACE_H
|
|
#define _ASM_PTRACE_H
|
|
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/types.h>
|
|
#include <asm/isadep.h>
|
|
#include <uapi/asm/ptrace.h>
|
|
|
|
/*
|
|
* This struct defines the way the registers are stored on the stack during a
|
|
* system call/exception. As usual the registers k0/k1 aren't being saved.
|
|
*/
|
|
struct pt_regs {
|
|
#ifdef CONFIG_32BIT
|
|
/* Pad bytes for argument save space on the stack. */
|
|
unsigned long pad0[8];
|
|
#endif
|
|
|
|
/* Saved main processor registers. */
|
|
unsigned long regs[32];
|
|
|
|
/* Saved special registers. */
|
|
unsigned long cp0_status;
|
|
unsigned long hi;
|
|
unsigned long lo;
|
|
#ifdef CONFIG_CPU_HAS_SMARTMIPS
|
|
unsigned long acx;
|
|
#endif
|
|
unsigned long cp0_badvaddr;
|
|
unsigned long cp0_cause;
|
|
unsigned long cp0_epc;
|
|
#ifdef CONFIG_CPU_CAVIUM_OCTEON
|
|
unsigned long long mpl[3]; /* MTM{0,1,2} */
|
|
unsigned long long mtp[3]; /* MTP{0,1,2} */
|
|
#endif
|
|
} __aligned(8);
|
|
|
|
struct task_struct;
|
|
|
|
extern int ptrace_getregs(struct task_struct *child,
|
|
struct user_pt_regs __user *data);
|
|
extern int ptrace_setregs(struct task_struct *child,
|
|
struct user_pt_regs __user *data);
|
|
|
|
extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
|
|
extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
|
|
|
|
extern int ptrace_get_watch_regs(struct task_struct *child,
|
|
struct pt_watch_regs __user *addr);
|
|
extern int ptrace_set_watch_regs(struct task_struct *child,
|
|
struct pt_watch_regs __user *addr);
|
|
|
|
/*
|
|
* Does the process account for user or for system time?
|
|
*/
|
|
#define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
|
|
|
|
static inline int is_syscall_success(struct pt_regs *regs)
|
|
{
|
|
return !regs->regs[7];
|
|
}
|
|
|
|
static inline long regs_return_value(struct pt_regs *regs)
|
|
{
|
|
if (is_syscall_success(regs))
|
|
return regs->regs[2];
|
|
else
|
|
return -regs->regs[2];
|
|
}
|
|
|
|
#define instruction_pointer(regs) ((regs)->cp0_epc)
|
|
#define profile_pc(regs) instruction_pointer(regs)
|
|
|
|
extern asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall);
|
|
extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
|
|
|
|
extern void die(const char *, struct pt_regs *) __noreturn;
|
|
|
|
static inline void die_if_kernel(const char *str, struct pt_regs *regs)
|
|
{
|
|
if (unlikely(!user_mode(regs)))
|
|
die(str, regs);
|
|
}
|
|
|
|
#define current_pt_regs() \
|
|
({ \
|
|
unsigned long sp = (unsigned long)__builtin_frame_address(0); \
|
|
(struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
|
|
})
|
|
|
|
/* Helpers for working with the user stack pointer */
|
|
|
|
static inline unsigned long user_stack_pointer(struct pt_regs *regs)
|
|
{
|
|
return regs->regs[29];
|
|
}
|
|
|
|
static inline void user_stack_pointer_set(struct pt_regs *regs,
|
|
unsigned long val)
|
|
{
|
|
regs->regs[29] = val;
|
|
}
|
|
|
|
#endif /* _ASM_PTRACE_H */
|