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 #define current_pt_regs() \ 65 ({ \ 66 unsigned long sp = (unsigned long)__builtin_frame_address(0); \ 67 (struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \ 68 }) 69 70 #endif /* _ASM_PTRACE_H */ 71