1/* ptrace.h: ptrace() relevant definitions
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11#ifndef _ASM_PTRACE_H
12#define _ASM_PTRACE_H
13
14#include <asm/irq_regs.h>
15#include <uapi/asm/ptrace.h>
16
17#define in_syscall(regs) (((regs)->tbr & TBR_TT) == TBR_TT_TRAP0)
18#ifndef __ASSEMBLY__
19
20struct task_struct;
21
22/*
23 * we dedicate GR28 to keeping a pointer to the current exception frame
24 * - gr28 is destroyed on entry to the kernel from userspace
25 */
26register struct pt_regs *__frame asm("gr28");
27
28#define user_mode(regs)			(!((regs)->psr & PSR_S))
29#define instruction_pointer(regs)	((regs)->pc)
30#define user_stack_pointer(regs)	((regs)->sp)
31#define current_pt_regs()		(__frame)
32
33extern unsigned long user_stack(const struct pt_regs *);
34#define profile_pc(regs) ((regs)->pc)
35
36#define task_pt_regs(task) ((task)->thread.frame0)
37
38#define arch_has_single_step()	(1)
39
40#endif /* !__ASSEMBLY__ */
41#endif /* _ASM_PTRACE_H */
42