1#ifndef _ASM_X86_PTRACE_H
2#define _ASM_X86_PTRACE_H
3
4#include <asm/segment.h>
5#include <asm/page_types.h>
6#include <uapi/asm/ptrace.h>
7
8#ifndef __ASSEMBLY__
9#ifdef __i386__
10
11struct pt_regs {
12 unsigned long bx;
13 unsigned long cx;
14 unsigned long dx;
15 unsigned long si;
16 unsigned long di;
17 unsigned long bp;
18 unsigned long ax;
19 unsigned long ds;
20 unsigned long es;
21 unsigned long fs;
22 unsigned long gs;
23 unsigned long orig_ax;
24 unsigned long ip;
25 unsigned long cs;
26 unsigned long flags;
27 unsigned long sp;
28 unsigned long ss;
29};
30
31#else
32
33struct pt_regs {
34
35
36
37
38 unsigned long r15;
39 unsigned long r14;
40 unsigned long r13;
41 unsigned long r12;
42 unsigned long bp;
43 unsigned long bx;
44
45 unsigned long r11;
46 unsigned long r10;
47 unsigned long r9;
48 unsigned long r8;
49 unsigned long ax;
50 unsigned long cx;
51 unsigned long dx;
52 unsigned long si;
53 unsigned long di;
54
55
56
57
58 unsigned long orig_ax;
59
60 unsigned long ip;
61 unsigned long cs;
62 unsigned long flags;
63 unsigned long sp;
64 unsigned long ss;
65
66};
67
68#endif
69
70#ifdef CONFIG_PARAVIRT
71#include <asm/paravirt_types.h>
72#endif
73
74struct cpuinfo_x86;
75struct task_struct;
76
77extern unsigned long profile_pc(struct pt_regs *regs);
78#define profile_pc profile_pc
79
80extern unsigned long
81convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
82extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
83 int error_code, int si_code);
84
85
86extern unsigned long syscall_trace_enter_phase1(struct pt_regs *, u32 arch);
87extern long syscall_trace_enter_phase2(struct pt_regs *, u32 arch,
88 unsigned long phase1_result);
89
90extern long syscall_trace_enter(struct pt_regs *);
91extern void syscall_trace_leave(struct pt_regs *);
92
93static inline unsigned long regs_return_value(struct pt_regs *regs)
94{
95 return regs->ax;
96}
97
98
99
100
101
102
103
104
105
106
107static inline int user_mode(struct pt_regs *regs)
108{
109#ifdef CONFIG_X86_32
110 return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >= USER_RPL;
111#else
112 return !!(regs->cs & 3);
113#endif
114}
115
116static inline int v8086_mode(struct pt_regs *regs)
117{
118#ifdef CONFIG_X86_32
119 return (regs->flags & X86_VM_MASK);
120#else
121 return 0;
122#endif
123}
124
125#ifdef CONFIG_X86_64
126static inline bool user_64bit_mode(struct pt_regs *regs)
127{
128#ifndef CONFIG_PARAVIRT
129
130
131
132
133 return regs->cs == __USER_CS;
134#else
135
136 return regs->cs == __USER_CS || regs->cs == pv_info.extra_user_64bit_cs;
137#endif
138}
139
140#define current_user_stack_pointer() current_pt_regs()->sp
141#define compat_user_stack_pointer() current_pt_regs()->sp
142#endif
143
144#ifdef CONFIG_X86_32
145extern unsigned long kernel_stack_pointer(struct pt_regs *regs);
146#else
147static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
148{
149 return regs->sp;
150}
151#endif
152
153#define GET_IP(regs) ((regs)->ip)
154#define GET_FP(regs) ((regs)->bp)
155#define GET_USP(regs) ((regs)->sp)
156
157#include <asm-generic/ptrace.h>
158
159
160extern int regs_query_register_offset(const char *name);
161extern const char *regs_query_register_name(unsigned int offset);
162#define MAX_REG_OFFSET (offsetof(struct pt_regs, ss))
163
164
165
166
167
168
169
170
171
172
173static inline unsigned long regs_get_register(struct pt_regs *regs,
174 unsigned int offset)
175{
176 if (unlikely(offset > MAX_REG_OFFSET))
177 return 0;
178#ifdef CONFIG_X86_32
179
180
181
182
183 if (offset == offsetof(struct pt_regs, sp) &&
184 regs->cs == __KERNEL_CS)
185 return kernel_stack_pointer(regs);
186#endif
187 return *(unsigned long *)((unsigned long)regs + offset);
188}
189
190
191
192
193
194
195
196
197
198static inline int regs_within_kernel_stack(struct pt_regs *regs,
199 unsigned long addr)
200{
201 return ((addr & ~(THREAD_SIZE - 1)) ==
202 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
203}
204
205
206
207
208
209
210
211
212
213
214static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
215 unsigned int n)
216{
217 unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
218 addr += n;
219 if (regs_within_kernel_stack(regs, (unsigned long)addr))
220 return *addr;
221 else
222 return 0;
223}
224
225#define arch_has_single_step() (1)
226#ifdef CONFIG_X86_DEBUGCTLMSR
227#define arch_has_block_step() (1)
228#else
229#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
230#endif
231
232#define ARCH_HAS_USER_SINGLE_STEP_INFO
233
234
235
236
237
238
239
240
241
242
243
244#define arch_ptrace_stop_needed(code, info) \
245({ \
246 force_iret(); \
247 false; \
248})
249
250struct user_desc;
251extern int do_get_thread_area(struct task_struct *p, int idx,
252 struct user_desc __user *info);
253extern int do_set_thread_area(struct task_struct *p, int idx,
254 struct user_desc __user *info, int can_allocate);
255
256#endif
257#endif
258