1 #ifndef _ASM_X86_PTRACE_H
2 #define _ASM_X86_PTRACE_H
3
4 #include <linux/compiler.h> /* For __user */
5 #include <asm/ptrace-abi.h>
6
7
8 #ifndef __ASSEMBLY__
9
10 #ifdef __i386__
11 /* this struct defines the way the registers are stored on the
12 stack during a system call. */
13
14 #ifndef __KERNEL__
15
16 struct pt_regs {
17 long ebx;
18 long ecx;
19 long edx;
20 long esi;
21 long edi;
22 long ebp;
23 long eax;
24 int xds;
25 int xes;
26 int xfs;
27 /* int gs; */
28 long orig_eax;
29 long eip;
30 int xcs;
31 long eflags;
32 long esp;
33 int xss;
34 };
35
36 #else /* __KERNEL__ */
37
38 struct pt_regs {
39 long bx;
40 long cx;
41 long dx;
42 long si;
43 long di;
44 long bp;
45 long ax;
46 int ds;
47 int es;
48 int fs;
49 /* int gs; */
50 long orig_ax;
51 long ip;
52 int cs;
53 long flags;
54 long sp;
55 int ss;
56 };
57
58 #include <asm/vm86.h>
59 #include <asm/segment.h>
60
61 #endif /* __KERNEL__ */
62
63 #else /* __i386__ */
64
65 #ifndef __KERNEL__
66
67 struct pt_regs {
68 unsigned long r15;
69 unsigned long r14;
70 unsigned long r13;
71 unsigned long r12;
72 unsigned long rbp;
73 unsigned long rbx;
74 /* arguments: non interrupts/non tracing syscalls only save upto here*/
75 unsigned long r11;
76 unsigned long r10;
77 unsigned long r9;
78 unsigned long r8;
79 unsigned long rax;
80 unsigned long rcx;
81 unsigned long rdx;
82 unsigned long rsi;
83 unsigned long rdi;
84 unsigned long orig_rax;
85 /* end of arguments */
86 /* cpu exception frame or undefined */
87 unsigned long rip;
88 unsigned long cs;
89 unsigned long eflags;
90 unsigned long rsp;
91 unsigned long ss;
92 /* top of stack page */
93 };
94
95 #else /* __KERNEL__ */
96
97 struct pt_regs {
98 unsigned long r15;
99 unsigned long r14;
100 unsigned long r13;
101 unsigned long r12;
102 unsigned long bp;
103 unsigned long bx;
104 /* arguments: non interrupts/non tracing syscalls only save upto here*/
105 unsigned long r11;
106 unsigned long r10;
107 unsigned long r9;
108 unsigned long r8;
109 unsigned long ax;
110 unsigned long cx;
111 unsigned long dx;
112 unsigned long si;
113 unsigned long di;
114 unsigned long orig_ax;
115 /* end of arguments */
116 /* cpu exception frame or undefined */
117 unsigned long ip;
118 unsigned long cs;
119 unsigned long flags;
120 unsigned long sp;
121 unsigned long ss;
122 /* top of stack page */
123 };
124
125 #endif /* __KERNEL__ */
126 #endif /* !__i386__ */
127
128 #ifdef __KERNEL__
129
130 /* the DS BTS struct is used for ptrace as well */
131 #include <asm/ds.h>
132
133 struct task_struct;
134
135 extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
136
137 extern unsigned long profile_pc(struct pt_regs *regs);
138
139 extern unsigned long
140 convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
141
142 #ifdef CONFIG_X86_32
143 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
144 #else
145 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
146 #endif
147
148 #define regs_return_value(regs) ((regs)->ax)
149
150 /*
151 * user_mode_vm(regs) determines whether a register set came from user mode.
152 * This is true if V8086 mode was enabled OR if the register set was from
153 * protected mode with RPL-3 CS value. This tricky test checks that with
154 * one comparison. Many places in the kernel can bypass this full check
155 * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
156 */
157 static inline int user_mode(struct pt_regs *regs)
158 {
159 #ifdef CONFIG_X86_32
160 return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
161 #else
162 return !!(regs->cs & 3);
163 #endif
164 }
165
166 static inline int user_mode_vm(struct pt_regs *regs)
167 {
168 #ifdef CONFIG_X86_32
169 return ((regs->cs & SEGMENT_RPL_MASK) |
170 (regs->flags & VM_MASK)) >= USER_RPL;
171 #else
172 return user_mode(regs);
173 #endif
174 }
175
176 static inline int v8086_mode(struct pt_regs *regs)
177 {
178 #ifdef CONFIG_X86_32
179 return (regs->flags & VM_MASK);
180 #else
181 return 0; /* No V86 mode support in long mode */
182 #endif
183 }
184
185 /*
186 * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
187 * when it traps. So regs will be the current sp.
188 *
189 * This is valid only for kernel mode traps.
190 */
191 static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
192 {
193 #ifdef CONFIG_X86_32
194 return (unsigned long)regs;
195 #else
196 return regs->sp;
197 #endif
198 }
199
200 static inline unsigned long instruction_pointer(struct pt_regs *regs)
201 {
202 return regs->ip;
203 }
204
205 static inline unsigned long frame_pointer(struct pt_regs *regs)
206 {
207 return regs->bp;
208 }
209
210 /*
211 * These are defined as per linux/ptrace.h, which see.
212 */
213 #define arch_has_single_step() (1)
214 extern void user_enable_single_step(struct task_struct *);
215 extern void user_disable_single_step(struct task_struct *);
216
217 extern void user_enable_block_step(struct task_struct *);
218 #ifdef CONFIG_X86_DEBUGCTLMSR
219 #define arch_has_block_step() (1)
220 #else
221 #define arch_has_block_step() (boot_cpu_data.x86 >= 6)
222 #endif
223
224 struct user_desc;
225 extern int do_get_thread_area(struct task_struct *p, int idx,
226 struct user_desc __user *info);
227 extern int do_set_thread_area(struct task_struct *p, int idx,
228 struct user_desc __user *info, int can_allocate);
229
230 #endif /* __KERNEL__ */
231
232 #endif /* !__ASSEMBLY__ */
233
234 #endif
235
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