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7#ifndef _ASM_X86_THREAD_INFO_H
8#define _ASM_X86_THREAD_INFO_H
9
10#include <linux/compiler.h>
11#include <asm/page.h>
12#include <asm/types.h>
13
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18
19#ifndef __ASSEMBLY__
20struct task_struct;
21struct exec_domain;
22#include <asm/processor.h>
23#include <linux/atomic.h>
24
25struct thread_info {
26 struct task_struct *task;
27 struct exec_domain *exec_domain;
28 __u32 flags;
29 __u32 status;
30 __u32 cpu;
31 int preempt_count;
32
33 mm_segment_t addr_limit;
34 struct restart_block restart_block;
35 void __user *sysenter_return;
36#ifdef CONFIG_X86_32
37 unsigned long previous_esp;
38
39
40 __u8 supervisor_stack[0];
41#endif
42 unsigned int sig_on_uaccess_error:1;
43 unsigned int uaccess_err:1;
44};
45
46#define INIT_THREAD_INFO(tsk) \
47{ \
48 .task = &tsk, \
49 .exec_domain = &default_exec_domain, \
50 .flags = 0, \
51 .cpu = 0, \
52 .preempt_count = INIT_PREEMPT_COUNT, \
53 .addr_limit = KERNEL_DS, \
54 .restart_block = { \
55 .fn = do_no_restart_syscall, \
56 }, \
57}
58
59#define init_thread_info (init_thread_union.thread_info)
60#define init_stack (init_thread_union.stack)
61
62#else
63
64#include <asm/asm-offsets.h>
65
66#endif
67
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74
75
76#define TIF_SYSCALL_TRACE 0
77#define TIF_NOTIFY_RESUME 1
78#define TIF_SIGPENDING 2
79#define TIF_NEED_RESCHED 3
80#define TIF_SINGLESTEP 4
81#define TIF_SYSCALL_EMU 6
82#define TIF_SYSCALL_AUDIT 7
83#define TIF_SECCOMP 8
84#define TIF_MCE_NOTIFY 10
85#define TIF_USER_RETURN_NOTIFY 11
86#define TIF_UPROBE 12
87#define TIF_NOTSC 16
88#define TIF_IA32 17
89#define TIF_FORK 18
90#define TIF_NOHZ 19
91#define TIF_MEMDIE 20
92#define TIF_DEBUG 21
93#define TIF_IO_BITMAP 22
94#define TIF_FORCED_TF 24
95#define TIF_BLOCKSTEP 25
96#define TIF_LAZY_MMU_UPDATES 27
97#define TIF_SYSCALL_TRACEPOINT 28
98#define TIF_ADDR32 29
99#define TIF_X32 30
100
101#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
102#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
103#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
104#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
105#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
106#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
107#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
108#define _TIF_SECCOMP (1 << TIF_SECCOMP)
109#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
110#define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY)
111#define _TIF_UPROBE (1 << TIF_UPROBE)
112#define _TIF_NOTSC (1 << TIF_NOTSC)
113#define _TIF_IA32 (1 << TIF_IA32)
114#define _TIF_FORK (1 << TIF_FORK)
115#define _TIF_NOHZ (1 << TIF_NOHZ)
116#define _TIF_DEBUG (1 << TIF_DEBUG)
117#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
118#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
119#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
120#define _TIF_LAZY_MMU_UPDATES (1 << TIF_LAZY_MMU_UPDATES)
121#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
122#define _TIF_ADDR32 (1 << TIF_ADDR32)
123#define _TIF_X32 (1 << TIF_X32)
124
125
126#define _TIF_WORK_SYSCALL_ENTRY \
127 (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_EMU | _TIF_SYSCALL_AUDIT | \
128 _TIF_SECCOMP | _TIF_SINGLESTEP | _TIF_SYSCALL_TRACEPOINT | \
129 _TIF_NOHZ)
130
131
132#define _TIF_WORK_SYSCALL_EXIT \
133 (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP | \
134 _TIF_SYSCALL_TRACEPOINT | _TIF_NOHZ)
135
136
137#define _TIF_WORK_MASK \
138 (0x0000FFFF & \
139 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \
140 _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU))
141
142
143#define _TIF_ALLWORK_MASK \
144 ((0x0000FFFF & ~_TIF_SECCOMP) | _TIF_SYSCALL_TRACEPOINT | \
145 _TIF_NOHZ)
146
147
148#define _TIF_DO_NOTIFY_MASK \
149 (_TIF_SIGPENDING | _TIF_MCE_NOTIFY | _TIF_NOTIFY_RESUME | \
150 _TIF_USER_RETURN_NOTIFY)
151
152
153#define _TIF_WORK_CTXSW \
154 (_TIF_IO_BITMAP|_TIF_NOTSC|_TIF_BLOCKSTEP)
155
156#define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY)
157#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
158
159#define PREEMPT_ACTIVE 0x10000000
160
161#ifdef CONFIG_X86_32
162
163#define STACK_WARN (THREAD_SIZE/8)
164
165
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167
168
169#ifndef __ASSEMBLY__
170
171
172
173register unsigned long current_stack_pointer asm("esp") __used;
174
175
176static inline struct thread_info *current_thread_info(void)
177{
178 return (struct thread_info *)
179 (current_stack_pointer & ~(THREAD_SIZE - 1));
180}
181
182#else
183
184
185#define GET_THREAD_INFO(reg) \
186 movl $-THREAD_SIZE, reg; \
187 andl %esp, reg
188
189
190#define GET_THREAD_INFO_WITH_ESP(reg) \
191 andl $-THREAD_SIZE, reg
192
193#endif
194
195#else
196
197#include <asm/percpu.h>
198#define KERNEL_STACK_OFFSET (5*8)
199
200
201
202
203
204#ifndef __ASSEMBLY__
205DECLARE_PER_CPU(unsigned long, kernel_stack);
206
207static inline struct thread_info *current_thread_info(void)
208{
209 struct thread_info *ti;
210 ti = (void *)(this_cpu_read_stable(kernel_stack) +
211 KERNEL_STACK_OFFSET - THREAD_SIZE);
212 return ti;
213}
214
215#else
216
217
218#define GET_THREAD_INFO(reg) \
219 movq PER_CPU_VAR(kernel_stack),reg ; \
220 subq $(THREAD_SIZE-KERNEL_STACK_OFFSET),reg
221
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225
226#define THREAD_INFO(reg, off) KERNEL_STACK_OFFSET+(off)-THREAD_SIZE(reg)
227
228#endif
229
230#endif
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238
239#define TS_COMPAT 0x0002
240#define TS_POLLING 0x0004
241
242#define TS_RESTORE_SIGMASK 0x0008
243
244#ifndef __ASSEMBLY__
245#define HAVE_SET_RESTORE_SIGMASK 1
246static inline void set_restore_sigmask(void)
247{
248 struct thread_info *ti = current_thread_info();
249 ti->status |= TS_RESTORE_SIGMASK;
250 WARN_ON(!test_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags));
251}
252static inline void clear_restore_sigmask(void)
253{
254 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
255}
256static inline bool test_restore_sigmask(void)
257{
258 return current_thread_info()->status & TS_RESTORE_SIGMASK;
259}
260static inline bool test_and_clear_restore_sigmask(void)
261{
262 struct thread_info *ti = current_thread_info();
263 if (!(ti->status & TS_RESTORE_SIGMASK))
264 return false;
265 ti->status &= ~TS_RESTORE_SIGMASK;
266 return true;
267}
268
269static inline bool is_ia32_task(void)
270{
271#ifdef CONFIG_X86_32
272 return true;
273#endif
274#ifdef CONFIG_IA32_EMULATION
275 if (current_thread_info()->status & TS_COMPAT)
276 return true;
277#endif
278 return false;
279}
280#endif
281
282#ifndef __ASSEMBLY__
283extern void arch_task_cache_init(void);
284extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
285extern void arch_release_task_struct(struct task_struct *tsk);
286#endif
287#endif
288