1/*
2 * Copyright (C) 2013 Altera Corporation
3 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
4 * Copyright (C) 2004 Microtronix Datacom Ltd
5 *
6 * based on m68k asm/processor.h
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License.  See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12
13#ifndef _ASM_NIOS2_PTRACE_H
14#define _ASM_NIOS2_PTRACE_H
15
16#include <uapi/asm/ptrace.h>
17
18/* This struct defines the way the registers are stored on the
19   stack during a system call.  */
20
21#ifndef __ASSEMBLY__
22struct pt_regs {
23	unsigned long  r8;	/* r8-r15 Caller-saved GP registers */
24	unsigned long  r9;
25	unsigned long  r10;
26	unsigned long  r11;
27	unsigned long  r12;
28	unsigned long  r13;
29	unsigned long  r14;
30	unsigned long  r15;
31	unsigned long  r1;	/* Assembler temporary */
32	unsigned long  r2;	/* Retval LS 32bits */
33	unsigned long  r3;	/* Retval MS 32bits */
34	unsigned long  r4;	/* r4-r7 Register arguments */
35	unsigned long  r5;
36	unsigned long  r6;
37	unsigned long  r7;
38	unsigned long  orig_r2;	/* Copy of r2 ?? */
39	unsigned long  ra;	/* Return address */
40	unsigned long  fp;	/* Frame pointer */
41	unsigned long  sp;	/* Stack pointer */
42	unsigned long  gp;	/* Global pointer */
43	unsigned long  estatus;
44	unsigned long  ea;	/* Exception return address (pc) */
45	unsigned long  orig_r7;
46};
47
48/*
49 * This is the extended stack used by signal handlers and the context
50 * switcher: it's pushed after the normal "struct pt_regs".
51 */
52struct switch_stack {
53	unsigned long  r16;	/* r16-r23 Callee-saved GP registers */
54	unsigned long  r17;
55	unsigned long  r18;
56	unsigned long  r19;
57	unsigned long  r20;
58	unsigned long  r21;
59	unsigned long  r22;
60	unsigned long  r23;
61	unsigned long  fp;
62	unsigned long  gp;
63	unsigned long  ra;
64};
65
66#define user_mode(regs)	(((regs)->estatus & ESTATUS_EU))
67
68#define instruction_pointer(regs)	((regs)->ra)
69#define profile_pc(regs)		instruction_pointer(regs)
70#define user_stack_pointer(regs)	((regs)->sp)
71extern void show_regs(struct pt_regs *);
72
73#define current_pt_regs() \
74	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE)\
75		- 1)
76
77#define force_successful_syscall_return() (current_pt_regs()->orig_r2 = -1)
78
79int do_syscall_trace_enter(void);
80void do_syscall_trace_exit(void);
81#endif /* __ASSEMBLY__ */
82#endif /* _ASM_NIOS2_PTRACE_H */
83