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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 <asm/ftrace.h>
24#include <linux/atomic.h>
25
26struct thread_info {
27 struct task_struct *task;
28 struct exec_domain *exec_domain;
29 __u32 flags;
30 __u32 status;
31 __u32 cpu;
32 int preempt_count;
33
34 mm_segment_t addr_limit;
35 struct restart_block restart_block;
36 void __user *sysenter_return;
37#ifdef CONFIG_X86_32
38 unsigned long previous_esp;
39
40
41 __u8 supervisor_stack[0];
42#endif
43 int uaccess_err;
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_IRET 5
82#define TIF_SYSCALL_EMU 6
83#define TIF_SYSCALL_AUDIT 7
84#define TIF_SECCOMP 8
85#define TIF_MCE_NOTIFY 10
86#define TIF_USER_RETURN_NOTIFY 11
87#define TIF_NOTSC 16
88#define TIF_IA32 17
89#define TIF_FORK 18
90#define TIF_MEMDIE 20
91#define TIF_DEBUG 21
92#define TIF_IO_BITMAP 22
93#define TIF_FREEZE 23
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
99#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
100#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
101#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
102#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
103#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
104#define _TIF_IRET (1 << TIF_IRET)
105#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
106#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
107#define _TIF_SECCOMP (1 << TIF_SECCOMP)
108#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
109#define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY)
110#define _TIF_NOTSC (1 << TIF_NOTSC)
111#define _TIF_IA32 (1 << TIF_IA32)
112#define _TIF_FORK (1 << TIF_FORK)
113#define _TIF_DEBUG (1 << TIF_DEBUG)
114#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
115#define _TIF_FREEZE (1 << TIF_FREEZE)
116#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
117#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
118#define _TIF_LAZY_MMU_UPDATES (1 << TIF_LAZY_MMU_UPDATES)
119#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
120
121
122#define _TIF_WORK_SYSCALL_ENTRY \
123 (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_EMU | _TIF_SYSCALL_AUDIT | \
124 _TIF_SECCOMP | _TIF_SINGLESTEP | _TIF_SYSCALL_TRACEPOINT)
125
126
127#define _TIF_WORK_SYSCALL_EXIT \
128 (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP | \
129 _TIF_SYSCALL_TRACEPOINT)
130
131
132#define _TIF_WORK_MASK \
133 (0x0000FFFF & \
134 ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \
135 _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU))
136
137
138#define _TIF_ALLWORK_MASK \
139 ((0x0000FFFF & ~_TIF_SECCOMP) | _TIF_SYSCALL_TRACEPOINT)
140
141
142#define _TIF_DO_NOTIFY_MASK \
143 (_TIF_SIGPENDING | _TIF_MCE_NOTIFY | _TIF_NOTIFY_RESUME | \
144 _TIF_USER_RETURN_NOTIFY)
145
146
147#define _TIF_WORK_CTXSW \
148 (_TIF_IO_BITMAP|_TIF_NOTSC|_TIF_BLOCKSTEP)
149
150#define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY)
151#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
152
153#define PREEMPT_ACTIVE 0x10000000
154
155
156#ifdef CONFIG_DEBUG_STACK_USAGE
157#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO)
158#else
159#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK)
160#endif
161
162#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
163
164#define alloc_thread_info_node(tsk, node) \
165({ \
166 struct page *page = alloc_pages_node(node, THREAD_FLAGS, \
167 THREAD_ORDER); \
168 struct thread_info *ret = page ? page_address(page) : NULL; \
169 \
170 ret; \
171})
172
173#ifdef CONFIG_X86_32
174
175#define STACK_WARN (THREAD_SIZE/8)
176
177
178
179
180
181#ifndef __ASSEMBLY__
182
183
184
185register unsigned long current_stack_pointer asm("esp") __used;
186
187
188static inline struct thread_info *current_thread_info(void)
189{
190 return (struct thread_info *)
191 (current_stack_pointer & ~(THREAD_SIZE - 1));
192}
193
194#else
195
196
197#define GET_THREAD_INFO(reg) \
198 movl $-THREAD_SIZE, reg; \
199 andl %esp, reg
200
201
202#define GET_THREAD_INFO_WITH_ESP(reg) \
203 andl $-THREAD_SIZE, reg
204
205#endif
206
207#else
208
209#include <asm/percpu.h>
210#define KERNEL_STACK_OFFSET (5*8)
211
212
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214
215
216#ifndef __ASSEMBLY__
217DECLARE_PER_CPU(unsigned long, kernel_stack);
218
219static inline struct thread_info *current_thread_info(void)
220{
221 struct thread_info *ti;
222 ti = (void *)(percpu_read_stable(kernel_stack) +
223 KERNEL_STACK_OFFSET - THREAD_SIZE);
224 return ti;
225}
226
227#else
228
229
230#define GET_THREAD_INFO(reg) \
231 movq PER_CPU_VAR(kernel_stack),reg ; \
232 subq $(THREAD_SIZE-KERNEL_STACK_OFFSET),reg
233
234#endif
235
236#endif
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244
245#define TS_USEDFPU 0x0001
246
247#define TS_COMPAT 0x0002
248#define TS_POLLING 0x0004
249
250#define TS_RESTORE_SIGMASK 0x0008
251
252#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
253
254#ifndef __ASSEMBLY__
255#define HAVE_SET_RESTORE_SIGMASK 1
256static inline void set_restore_sigmask(void)
257{
258 struct thread_info *ti = current_thread_info();
259 ti->status |= TS_RESTORE_SIGMASK;
260 set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
261}
262#endif
263
264#ifndef __ASSEMBLY__
265extern void arch_task_cache_init(void);
266extern void free_thread_info(struct thread_info *ti);
267extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
268#define arch_task_cache_init arch_task_cache_init
269#endif
270#endif
271