arch/mips/include/asm/ptrace.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
   7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   8  */
   9 #ifndef _ASM_PTRACE_H
  10 #define _ASM_PTRACE_H
  11
  12
  13 #include <linux/compiler.h>
  14 #include <linux/linkage.h>
  15 #include <linux/types.h>
  16 #include <asm/isadep.h>
  17 #include <uapi/asm/ptrace.h>
  18
  19 struct task_struct;
  20
  21 extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
  22 extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
  23
  24 extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
  25 extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
  26
  27 extern int ptrace_get_watch_regs(struct task_struct *child,
  28         struct pt_watch_regs __user *addr);
  29 extern int ptrace_set_watch_regs(struct task_struct *child,
  30         struct pt_watch_regs __user *addr);
  31
  32 /*
  33  * Does the process account for user or for system time?
  34  */
  35 #define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
  36
  37 static inline int is_syscall_success(struct pt_regs *regs)
  38 {
  39         return !regs->regs[7];
  40 }
  41
  42 static inline long regs_return_value(struct pt_regs *regs)
  43 {
  44         if (is_syscall_success(regs))
  45                 return regs->regs[2];
  46         else
  47                 return -regs->regs[2];
  48 }
  49
  50 #define instruction_pointer(regs) ((regs)->cp0_epc)
  51 #define profile_pc(regs) instruction_pointer(regs)
  52
  53 extern asmlinkage void syscall_trace_enter(struct pt_regs *regs);
  54 extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
  55
  56 extern void die(const char *, struct pt_regs *) __noreturn;
  57
  58 static inline void die_if_kernel(const char *str, struct pt_regs *regs)
  59 {
  60         if (unlikely(!user_mode(regs)))
  61                 die(str, regs);
  62 }
  63
  64 #endif /* _ASM_PTRACE_H */