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1965aae3 PA |
1 | #ifndef _ASM_X86_PTRACE_H |
2 | #define _ASM_X86_PTRACE_H | |
8fc37f2c TG |
3 | |
4 | #include <linux/compiler.h> /* For __user */ | |
5 | #include <asm/ptrace-abi.h> | |
6330a30a | 6 | #include <asm/processor-flags.h> |
8fc37f2c | 7 | |
6330a30a | 8 | #ifdef __KERNEL__ |
6330a30a | 9 | #include <asm/segment.h> |
b1cf540f | 10 | #include <asm/page_types.h> |
6330a30a | 11 | #endif |
eee3af4a | 12 | |
8fc37f2c TG |
13 | #ifndef __ASSEMBLY__ |
14 | ||
15 | #ifdef __i386__ | |
16 | /* this struct defines the way the registers are stored on the | |
17 | stack during a system call. */ | |
18 | ||
65ea5b03 PA |
19 | #ifndef __KERNEL__ |
20 | ||
8fc37f2c TG |
21 | struct pt_regs { |
22 | long ebx; | |
23 | long ecx; | |
24 | long edx; | |
25 | long esi; | |
26 | long edi; | |
27 | long ebp; | |
28 | long eax; | |
29 | int xds; | |
30 | int xes; | |
31 | int xfs; | |
ccbeed3a | 32 | int xgs; |
8fc37f2c TG |
33 | long orig_eax; |
34 | long eip; | |
35 | int xcs; | |
36 | long eflags; | |
37 | long esp; | |
38 | int xss; | |
39 | }; | |
40 | ||
65ea5b03 PA |
41 | #else /* __KERNEL__ */ |
42 | ||
43 | struct pt_regs { | |
92bc2056 HH |
44 | unsigned long bx; |
45 | unsigned long cx; | |
46 | unsigned long dx; | |
47 | unsigned long si; | |
48 | unsigned long di; | |
49 | unsigned long bp; | |
9902a702 | 50 | unsigned long ax; |
92bc2056 HH |
51 | unsigned long ds; |
52 | unsigned long es; | |
53 | unsigned long fs; | |
ccbeed3a | 54 | unsigned long gs; |
9902a702 | 55 | unsigned long orig_ax; |
92bc2056 HH |
56 | unsigned long ip; |
57 | unsigned long cs; | |
58 | unsigned long flags; | |
59 | unsigned long sp; | |
60 | unsigned long ss; | |
65ea5b03 | 61 | }; |
8fc37f2c | 62 | |
8fc37f2c TG |
63 | #endif /* __KERNEL__ */ |
64 | ||
65 | #else /* __i386__ */ | |
66 | ||
65ea5b03 PA |
67 | #ifndef __KERNEL__ |
68 | ||
8fc37f2c TG |
69 | struct pt_regs { |
70 | unsigned long r15; | |
71 | unsigned long r14; | |
72 | unsigned long r13; | |
73 | unsigned long r12; | |
74 | unsigned long rbp; | |
75 | unsigned long rbx; | |
76 | /* arguments: non interrupts/non tracing syscalls only save upto here*/ | |
77 | unsigned long r11; | |
78 | unsigned long r10; | |
79 | unsigned long r9; | |
80 | unsigned long r8; | |
81 | unsigned long rax; | |
82 | unsigned long rcx; | |
83 | unsigned long rdx; | |
84 | unsigned long rsi; | |
85 | unsigned long rdi; | |
86 | unsigned long orig_rax; | |
87 | /* end of arguments */ | |
88 | /* cpu exception frame or undefined */ | |
89 | unsigned long rip; | |
90 | unsigned long cs; | |
91 | unsigned long eflags; | |
92 | unsigned long rsp; | |
93 | unsigned long ss; | |
94 | /* top of stack page */ | |
95 | }; | |
96 | ||
65ea5b03 PA |
97 | #else /* __KERNEL__ */ |
98 | ||
99 | struct pt_regs { | |
100 | unsigned long r15; | |
101 | unsigned long r14; | |
102 | unsigned long r13; | |
103 | unsigned long r12; | |
104 | unsigned long bp; | |
105 | unsigned long bx; | |
106 | /* arguments: non interrupts/non tracing syscalls only save upto here*/ | |
107 | unsigned long r11; | |
108 | unsigned long r10; | |
109 | unsigned long r9; | |
110 | unsigned long r8; | |
111 | unsigned long ax; | |
112 | unsigned long cx; | |
113 | unsigned long dx; | |
114 | unsigned long si; | |
115 | unsigned long di; | |
116 | unsigned long orig_ax; | |
117 | /* end of arguments */ | |
118 | /* cpu exception frame or undefined */ | |
119 | unsigned long ip; | |
120 | unsigned long cs; | |
121 | unsigned long flags; | |
122 | unsigned long sp; | |
123 | unsigned long ss; | |
124 | /* top of stack page */ | |
125 | }; | |
8fc37f2c | 126 | |
dbe3533b HH |
127 | #endif /* __KERNEL__ */ |
128 | #endif /* !__i386__ */ | |
8fc37f2c | 129 | |
93fa7636 | 130 | |
dbe3533b HH |
131 | #ifdef __KERNEL__ |
132 | ||
93fa7636 | 133 | #include <linux/init.h> |
8fc37f2c | 134 | |
93fa7636 | 135 | struct cpuinfo_x86; |
8fc37f2c TG |
136 | struct task_struct; |
137 | ||
dbe3533b HH |
138 | extern unsigned long profile_pc(struct pt_regs *regs); |
139 | ||
8fc37f2c | 140 | extern unsigned long |
37cd9cf3 | 141 | convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs); |
72f74fa2 | 142 | extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, |
da654b74 | 143 | int error_code, int si_code); |
72fa50f4 HS |
144 | void signal_fault(struct pt_regs *regs, void __user *frame, char *where); |
145 | ||
c1686aea JS |
146 | extern long syscall_trace_enter(struct pt_regs *); |
147 | extern void syscall_trace_leave(struct pt_regs *); | |
148 | ||
9902a702 HH |
149 | static inline unsigned long regs_return_value(struct pt_regs *regs) |
150 | { | |
151 | return regs->ax; | |
152 | } | |
efd1ca52 | 153 | |
90d43d72 HH |
154 | /* |
155 | * user_mode_vm(regs) determines whether a register set came from user mode. | |
156 | * This is true if V8086 mode was enabled OR if the register set was from | |
157 | * protected mode with RPL-3 CS value. This tricky test checks that with | |
158 | * one comparison. Many places in the kernel can bypass this full check | |
159 | * if they have already ruled out V8086 mode, so user_mode(regs) can be used. | |
160 | */ | |
161 | static inline int user_mode(struct pt_regs *regs) | |
162 | { | |
163 | #ifdef CONFIG_X86_32 | |
164 | return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL; | |
165 | #else | |
166 | return !!(regs->cs & 3); | |
167 | #endif | |
168 | } | |
169 | ||
170 | static inline int user_mode_vm(struct pt_regs *regs) | |
171 | { | |
172 | #ifdef CONFIG_X86_32 | |
6b6891f9 | 173 | return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >= |
72f74fa2 | 174 | USER_RPL; |
90d43d72 HH |
175 | #else |
176 | return user_mode(regs); | |
177 | #endif | |
178 | } | |
179 | ||
180 | static inline int v8086_mode(struct pt_regs *regs) | |
181 | { | |
182 | #ifdef CONFIG_X86_32 | |
6b6891f9 | 183 | return (regs->flags & X86_VM_MASK); |
90d43d72 HH |
184 | #else |
185 | return 0; /* No V86 mode support in long mode */ | |
186 | #endif | |
187 | } | |
188 | ||
f6e8e284 HH |
189 | /* |
190 | * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode | |
7b6c6c77 MH |
191 | * when it traps. The previous stack will be directly underneath the saved |
192 | * registers, and 'sp/ss' won't even have been saved. Thus the '®s->sp'. | |
f6e8e284 HH |
193 | * |
194 | * This is valid only for kernel mode traps. | |
195 | */ | |
7b6c6c77 | 196 | static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
90d43d72 HH |
197 | { |
198 | #ifdef CONFIG_X86_32 | |
7b6c6c77 | 199 | return (unsigned long)(®s->sp); |
90d43d72 HH |
200 | #else |
201 | return regs->sp; | |
202 | #endif | |
203 | } | |
204 | ||
205 | static inline unsigned long instruction_pointer(struct pt_regs *regs) | |
206 | { | |
207 | return regs->ip; | |
208 | } | |
209 | ||
210 | static inline unsigned long frame_pointer(struct pt_regs *regs) | |
211 | { | |
212 | return regs->bp; | |
213 | } | |
214 | ||
68bd0f4e RM |
215 | static inline unsigned long user_stack_pointer(struct pt_regs *regs) |
216 | { | |
217 | return regs->sp; | |
218 | } | |
219 | ||
b1cf540f MH |
220 | /* Query offset/name of register from its name/offset */ |
221 | extern int regs_query_register_offset(const char *name); | |
222 | extern const char *regs_query_register_name(unsigned int offset); | |
223 | #define MAX_REG_OFFSET (offsetof(struct pt_regs, ss)) | |
224 | ||
225 | /** | |
226 | * regs_get_register() - get register value from its offset | |
227 | * @regs: pt_regs from which register value is gotten. | |
228 | * @offset: offset number of the register. | |
229 | * | |
e859cf86 MH |
230 | * regs_get_register returns the value of a register. The @offset is the |
231 | * offset of the register in struct pt_regs address which specified by @regs. | |
b1cf540f MH |
232 | * If @offset is bigger than MAX_REG_OFFSET, this returns 0. |
233 | */ | |
234 | static inline unsigned long regs_get_register(struct pt_regs *regs, | |
235 | unsigned int offset) | |
236 | { | |
237 | if (unlikely(offset > MAX_REG_OFFSET)) | |
238 | return 0; | |
239 | return *(unsigned long *)((unsigned long)regs + offset); | |
240 | } | |
241 | ||
242 | /** | |
243 | * regs_within_kernel_stack() - check the address in the stack | |
244 | * @regs: pt_regs which contains kernel stack pointer. | |
245 | * @addr: address which is checked. | |
246 | * | |
e859cf86 | 247 | * regs_within_kernel_stack() checks @addr is within the kernel stack page(s). |
b1cf540f MH |
248 | * If @addr is within the kernel stack, it returns true. If not, returns false. |
249 | */ | |
250 | static inline int regs_within_kernel_stack(struct pt_regs *regs, | |
251 | unsigned long addr) | |
252 | { | |
253 | return ((addr & ~(THREAD_SIZE - 1)) == | |
254 | (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1))); | |
255 | } | |
256 | ||
257 | /** | |
258 | * regs_get_kernel_stack_nth() - get Nth entry of the stack | |
259 | * @regs: pt_regs which contains kernel stack pointer. | |
260 | * @n: stack entry number. | |
261 | * | |
262 | * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which | |
e859cf86 | 263 | * is specified by @regs. If the @n th entry is NOT in the kernel stack, |
b1cf540f MH |
264 | * this returns 0. |
265 | */ | |
266 | static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, | |
267 | unsigned int n) | |
268 | { | |
269 | unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); | |
270 | addr += n; | |
271 | if (regs_within_kernel_stack(regs, (unsigned long)addr)) | |
272 | return *addr; | |
273 | else | |
274 | return 0; | |
275 | } | |
276 | ||
7f232343 | 277 | #define arch_has_single_step() (1) |
10faa81e RM |
278 | #ifdef CONFIG_X86_DEBUGCTLMSR |
279 | #define arch_has_block_step() (1) | |
280 | #else | |
281 | #define arch_has_block_step() (boot_cpu_data.x86 >= 6) | |
282 | #endif | |
283 | ||
7f38551f ON |
284 | #define ARCH_HAS_USER_SINGLE_STEP_INFO |
285 | ||
efd1ca52 RM |
286 | struct user_desc; |
287 | extern int do_get_thread_area(struct task_struct *p, int idx, | |
288 | struct user_desc __user *info); | |
289 | extern int do_set_thread_area(struct task_struct *p, int idx, | |
290 | struct user_desc __user *info, int can_allocate); | |
291 | ||
292 | #endif /* __KERNEL__ */ | |
293 | ||
8fc37f2c TG |
294 | #endif /* !__ASSEMBLY__ */ |
295 | ||
1965aae3 | 296 | #endif /* _ASM_X86_PTRACE_H */ |