1/*
2 * include/asm-xtensa/ptrace.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
10
11#ifndef _UAPI_XTENSA_PTRACE_H
12#define _UAPI_XTENSA_PTRACE_H
13
14/*
15 * Kernel stack
16 *
17 * 		+-----------------------+  -------- STACK_SIZE
18 * 		|     register file     |  |
19 * 		+-----------------------+  |
20 * 		|    struct pt_regs     |  |
21 * 		+-----------------------+  | ------ PT_REGS_OFFSET
22 * double 	:  16 bytes spill area  :  |  ^
23 * excetion 	:- - - - - - - - - - - -:  |  |
24 * frame	:    struct pt_regs     :  |  |
25 * 		:- - - - - - - - - - - -:  |  |
26 * 		|                       |  |  |
27 * 		|     memory stack      |  |  |
28 * 		|                       |  |  |
29 * 		~                       ~  ~  ~
30 * 		~                       ~  ~  ~
31 * 		|                       |  |  |
32 * 		|                       |  |  |
33 * 		+-----------------------+  |  | --- STACK_BIAS
34 * 		|  struct task_struct   |  |  |  ^
35 *  current --> +-----------------------+  |  |  |
36 * 		|  struct thread_info   |  |  |  |
37 *		+-----------------------+ --------
38 */
39
40#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)
41
42/*  Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */
43
44#define EXC_TABLE_KSTK		0x004	/* Kernel Stack */
45#define EXC_TABLE_DOUBLE_SAVE	0x008	/* Double exception save area for a0 */
46#define EXC_TABLE_FIXUP		0x00c	/* Fixup handler */
47#define EXC_TABLE_PARAM		0x010	/* For passing a parameter to fixup */
48#define EXC_TABLE_SYSCALL_SAVE	0x014	/* For fast syscall handler */
49#define EXC_TABLE_FAST_USER	0x100	/* Fast user exception handler */
50#define EXC_TABLE_FAST_KERNEL	0x200	/* Fast kernel exception handler */
51#define EXC_TABLE_DEFAULT	0x300	/* Default C-Handler */
52#define EXC_TABLE_SIZE		0x400
53
54/* Registers used by strace */
55
56#define REG_A_BASE	0x0000
57#define REG_AR_BASE	0x0100
58#define REG_PC		0x0020
59#define REG_PS		0x02e6
60#define REG_WB		0x0248
61#define REG_WS		0x0249
62#define REG_LBEG	0x0200
63#define REG_LEND	0x0201
64#define REG_LCOUNT	0x0202
65#define REG_SAR		0x0203
66
67#define SYSCALL_NR	0x00ff
68
69/* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */
70
71#define PTRACE_GETREGS		12
72#define PTRACE_SETREGS		13
73#define PTRACE_GETXTREGS	18
74#define PTRACE_SETXTREGS	19
75
76
77#endif /* _UAPI_XTENSA_PTRACE_H */
78