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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#ifndef _ASM_X86_PTRACE_H
#define _ASM_X86_PTRACE_H
#include <linux/compiler.h> /* For __user */
#include <asm/ptrace-abi.h>
#ifndef __ASSEMBLY__
#ifdef __KERNEL__
/* the DS BTS struct is used for ptrace as well */
#include <asm/ds.h>
struct task_struct;
extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
#endif /* __KERNEL__ */
#ifdef __i386__
/* this struct defines the way the registers are stored on the
stack during a system call. */
#ifndef __KERNEL__
struct pt_regs {
long ebx;
long ecx;
long edx;
long esi;
long edi;
long ebp;
long eax;
int xds;
int xes;
int xfs;
/* int gs; */
long orig_eax;
long eip;
int xcs;
long eflags;
long esp;
int xss;
};
#else /* __KERNEL__ */
struct pt_regs {
long bx;
long cx;
long dx;
long si;
long di;
long bp;
long ax;
int ds;
int es;
int fs;
/* int gs; */
long orig_ax;
long ip;
int cs;
long flags;
long sp;
int ss;
};
#include <asm/vm86.h>
#include <asm/segment.h>
struct task_struct;
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
/*
* user_mode_vm(regs) determines whether a register set came from user mode.
* This is true if V8086 mode was enabled OR if the register set was from
* protected mode with RPL-3 CS value. This tricky test checks that with
* one comparison. Many places in the kernel can bypass this full check
* if they have already ruled out V8086 mode, so user_mode(regs) can be used.
*/
static inline int user_mode(struct pt_regs *regs)
{
return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
}
static inline int user_mode_vm(struct pt_regs *regs)
{
return ((regs->cs & SEGMENT_RPL_MASK) |
(regs->flags & VM_MASK)) >= USER_RPL;
}
static inline int v8086_mode(struct pt_regs *regs)
{
return (regs->flags & VM_MASK);
}
#define instruction_pointer(regs) ((regs)->ip)
#define frame_pointer(regs) ((regs)->bp)
#define stack_pointer(regs) ((unsigned long)(regs))
#define regs_return_value(regs) ((regs)->ax)
extern unsigned long profile_pc(struct pt_regs *regs);
#endif /* __KERNEL__ */
#else /* __i386__ */
#ifndef __KERNEL__
struct pt_regs {
unsigned long r15;
unsigned long r14;
unsigned long r13;
unsigned long r12;
unsigned long rbp;
unsigned long rbx;
/* arguments: non interrupts/non tracing syscalls only save upto here*/
unsigned long r11;
unsigned long r10;
unsigned long r9;
unsigned long r8;
unsigned long rax;
unsigned long rcx;
unsigned long rdx;
unsigned long rsi;
unsigned long rdi;
unsigned long orig_rax;
/* end of arguments */
/* cpu exception frame or undefined */
unsigned long rip;
unsigned long cs;
unsigned long eflags;
unsigned long rsp;
unsigned long ss;
/* top of stack page */
};
#else /* __KERNEL__ */
struct pt_regs {
unsigned long r15;
unsigned long r14;
unsigned long r13;
unsigned long r12;
unsigned long bp;
unsigned long bx;
/* arguments: non interrupts/non tracing syscalls only save upto here*/
unsigned long r11;
unsigned long r10;
unsigned long r9;
unsigned long r8;
unsigned long ax;
unsigned long cx;
unsigned long dx;
unsigned long si;
unsigned long di;
unsigned long orig_ax;
/* end of arguments */
/* cpu exception frame or undefined */
unsigned long ip;
unsigned long cs;
unsigned long flags;
unsigned long sp;
unsigned long ss;
/* top of stack page */
};
#define user_mode(regs) (!!((regs)->cs & 3))
#define user_mode_vm(regs) user_mode(regs)
#define v8086_mode(regs) 0 /* No V86 mode support in long mode */
#define instruction_pointer(regs) ((regs)->ip)
#define frame_pointer(regs) ((regs)->bp)
#define stack_pointer(regs) ((regs)->sp)
#define regs_return_value(regs) ((regs)->ax)
extern unsigned long profile_pc(struct pt_regs *regs);
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
struct task_struct;
extern unsigned long
convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
#endif /* __KERNEL__ */
#endif /* !__i386__ */
#ifdef __KERNEL__
unsigned long get_segment_eip(struct pt_regs *regs, unsigned long *eip_limit);
/*
* These are defined as per linux/ptrace.h, which see.
*/
#define arch_has_single_step() (1)
extern void user_enable_single_step(struct task_struct *);
extern void user_disable_single_step(struct task_struct *);
extern void user_enable_block_step(struct task_struct *);
#ifdef CONFIG_X86_DEBUGCTLMSR
#define arch_has_block_step() (1)
#else
#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
#endif
struct user_desc;
extern int do_get_thread_area(struct task_struct *p, int idx,
struct user_desc __user *info);
extern int do_set_thread_area(struct task_struct *p, int idx,
struct user_desc __user *info, int can_allocate);
#endif /* __KERNEL__ */
#endif /* !__ASSEMBLY__ */
#endif
|
