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
6 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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>
21 extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
22 extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
24 extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
25 extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
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);
33 * Does the process account for user or for system time?
35 #define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
37 static inline int is_syscall_success(struct pt_regs *regs)
39 return !regs->regs[7];
42 static inline long regs_return_value(struct pt_regs *regs)
44 if (is_syscall_success(regs))
47 return -regs->regs[2];
50 #define instruction_pointer(regs) ((regs)->cp0_epc)
51 #define profile_pc(regs) instruction_pointer(regs)
52 #define user_stack_pointer(r) ((r)->regs[29])
54 extern asmlinkage void syscall_trace_enter(struct pt_regs *regs);
55 extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
57 extern void die(const char *, struct pt_regs *) __noreturn;
59 static inline void die_if_kernel(const char *str, struct pt_regs *regs)
61 if (unlikely(!user_mode(regs)))
65 #define current_pt_regs() \
67 unsigned long sp = (unsigned long)__builtin_frame_address(0); \
68 (struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
71 #endif /* _ASM_PTRACE_H */