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
139
140
141
142
143
144
|
#ifndef __ASM_SH_PTRACE_H
#define __ASM_SH_PTRACE_H
/*
* Copyright (C) 1999, 2000 Niibe Yutaka
*/
#define PTRACE_GETREGS 12 /* General registers */
#define PTRACE_SETREGS 13
#define PTRACE_GETFPREGS 14 /* FPU registers */
#define PTRACE_SETFPREGS 15
#define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */
#define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
#define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */
#define PTRACE_GETDSPREGS 55 /* DSP registers */
#define PTRACE_SETDSPREGS 56
#define PT_TEXT_END_ADDR 240
#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */
#define PT_DATA_ADDR 248 /* &(struct user)->start_data */
#define PT_TEXT_LEN 252
#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
#include "ptrace_64.h"
#else
#include "ptrace_32.h"
#endif
#ifdef __KERNEL__
#include <linux/stringify.h>
#include <linux/stddef.h>
#include <linux/thread_info.h>
#include <asm/addrspace.h>
#include <asm/page.h>
#include <asm/system.h>
#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
#define user_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
#define instruction_pointer(regs) ((unsigned long)(regs)->pc)
extern void show_regs(struct pt_regs *);
#define arch_has_single_step() (1)
/*
* kprobe-based event tracer support
*/
struct pt_regs_offset {
const char *name;
int offset;
};
#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
#define REGS_OFFSET_NAME(num) \
{.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
#define TREGS_OFFSET_NAME(num) \
{.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
#define REG_OFFSET_END {.name = NULL, .offset = 0}
/* Query offset/name of register from its name/offset */
extern int regs_query_register_offset(const char *name);
extern const char *regs_query_register_name(unsigned int offset);
extern const struct pt_regs_offset regoffset_table[];
/**
* regs_get_register() - get register value from its offset
* @regs: pt_regs from which register value is gotten.
* @offset: offset number of the register.
*
* regs_get_register returns the value of a register. The @offset is the
* offset of the register in struct pt_regs address which specified by @regs.
* If @offset is bigger than MAX_REG_OFFSET, this returns 0.
*/
static inline unsigned long regs_get_register(struct pt_regs *regs,
unsigned int offset)
{
if (unlikely(offset > MAX_REG_OFFSET))
return 0;
return *(unsigned long *)((unsigned long)regs + offset);
}
/**
* regs_within_kernel_stack() - check the address in the stack
* @regs: pt_regs which contains kernel stack pointer.
* @addr: address which is checked.
*
* regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
* If @addr is within the kernel stack, it returns true. If not, returns false.
*/
static inline int regs_within_kernel_stack(struct pt_regs *regs,
unsigned long addr)
{
return ((addr & ~(THREAD_SIZE - 1)) ==
(kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
}
/**
* regs_get_kernel_stack_nth() - get Nth entry of the stack
* @regs: pt_regs which contains kernel stack pointer.
* @n: stack entry number.
*
* regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
* is specified by @regs. If the @n th entry is NOT in the kernel stack,
* this returns 0.
*/
static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
unsigned int n)
{
unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
addr += n;
if (regs_within_kernel_stack(regs, (unsigned long)addr))
return *addr;
else
return 0;
}
struct perf_event;
struct perf_sample_data;
extern void ptrace_triggered(struct perf_event *bp, int nmi,
struct perf_sample_data *data, struct pt_regs *regs);
#define task_pt_regs(task) \
((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
static inline unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);
if (virt_addr_uncached(pc))
return CAC_ADDR(pc);
return pc;
}
#endif /* __KERNEL__ */
#endif /* __ASM_SH_PTRACE_H */
|
