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__
22 struct 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 */
52 struct 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)
71 extern 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 int do_syscall_trace_enter(void);
78 void do_syscall_trace_exit(void);
79 #endif /* __ASSEMBLY__ */
80 #endif /* _ASM_NIOS2_PTRACE_H */