blob: 0d42c934b66f3404dfefa6d84a25ea9566f69e5f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* include/asm-xtensa/ptrace.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001 - 2005 Tensilica Inc.
*/
#ifndef _XTENSA_PTRACE_H
#define _XTENSA_PTRACE_H
/*
* Kernel stack
*
* +-----------------------+ -------- STACK_SIZE
* | register file | |
* +-----------------------+ |
* | struct pt_regs | |
* +-----------------------+ | ------ PT_REGS_OFFSET
* double : 16 bytes spill area : | ^
* excetion :- - - - - - - - - - - -: | |
* frame : struct pt_regs : | |
* :- - - - - - - - - - - -: | |
* | | | |
* | memory stack | | |
* | | | |
* ~ ~ ~ ~
* ~ ~ ~ ~
* | | | |
* | | | |
* +-----------------------+ | | --- STACK_BIAS
* | struct task_struct | | | ^
* current --> +-----------------------+ | | |
* | struct thread_info | | | |
* +-----------------------+ --------
*/
#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)
/* Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */
#define EXC_TABLE_KSTK 0x004 /* Kernel Stack */
#define EXC_TABLE_DOUBLE_SAVE 0x008 /* Double exception save area for a0 */
#define EXC_TABLE_FIXUP 0x00c /* Fixup handler */
#define EXC_TABLE_PARAM 0x010 /* For passing a parameter to fixup */
#define EXC_TABLE_SYSCALL_SAVE 0x014 /* For fast syscall handler */
#define EXC_TABLE_FAST_USER 0x100 /* Fast user exception handler */
#define EXC_TABLE_FAST_KERNEL 0x200 /* Fast kernel exception handler */
#define EXC_TABLE_DEFAULT 0x300 /* Default C-Handler */
#define EXC_TABLE_SIZE 0x400
/* Registers used by strace */
#define REG_A_BASE 0x0000
#define REG_AR_BASE 0x0100
#define REG_PC 0x0020
#define REG_PS 0x02e6
#define REG_WB 0x0248
#define REG_WS 0x0249
#define REG_LBEG 0x0200
#define REG_LEND 0x0201
#define REG_LCOUNT 0x0202
#define REG_SAR 0x0203
#define SYSCALL_NR 0x00ff
/* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */
#define PTRACE_GETREGS 12
#define PTRACE_SETREGS 13
#define PTRACE_GETXTREGS 18
#define PTRACE_SETXTREGS 19
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <asm/coprocessor.h>
/*
* This struct defines the way the registers are stored on the
* kernel stack during a system call or other kernel entry.
*/
struct pt_regs {
unsigned long pc; /* 4 */
unsigned long ps; /* 8 */
unsigned long depc; /* 12 */
unsigned long exccause; /* 16 */
unsigned long excvaddr; /* 20 */
unsigned long debugcause; /* 24 */
unsigned long wmask; /* 28 */
unsigned long lbeg; /* 32 */
unsigned long lend; /* 36 */
unsigned long lcount; /* 40 */
unsigned long sar; /* 44 */
unsigned long windowbase; /* 48 */
unsigned long windowstart; /* 52 */
unsigned long syscall; /* 56 */
unsigned long icountlevel; /* 60 */
int reserved[1]; /* 64 */
/* Additional configurable registers that are used by the compiler. */
xtregs_opt_t xtregs_opt;
/* Make sure the areg field is 16 bytes aligned. */
int align[0] __attribute__ ((aligned(16)));
/* current register frame.
* Note: The ESF for kernel exceptions ends after 16 registers!
*/
unsigned long areg[16]; /* 128 (64) */
};
#include <variant/core.h>
# define arch_has_single_step() (1)
# define task_pt_regs(tsk) ((struct pt_regs*) \
(task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
# define instruction_pointer(regs) ((regs)->pc)
extern void show_regs(struct pt_regs *);
# ifndef CONFIG_SMP
# define profile_pc(regs) instruction_pointer(regs)
# endif
#else /* __ASSEMBLY__ */
# include <asm/asm-offsets.h>
#define PT_REGS_OFFSET (KERNEL_STACK_SIZE - PT_USER_SIZE)
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _XTENSA_PTRACE_H */
|
