tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __UM_THREAD_INFO_H
7#define __UM_THREAD_INFO_H
8
9#ifndef __ASSEMBLY__
10
11#include <asm/types.h>
12#include <asm/page.h>
13#include <asm/segment.h>
14
15struct thread_info {
16 struct task_struct *task; /* main task structure */
17 unsigned long flags; /* low level flags */
18 __u32 cpu; /* current CPU */
19 int preempt_count; /* 0 => preemptable,
20 <0 => BUG */
21 mm_segment_t addr_limit; /* thread address space:
22 0-0xBFFFFFFF for user
23 0-0xFFFFFFFF for kernel */
24 struct thread_info *real_thread; /* Points to non-IRQ stack */
25};
26
27#define INIT_THREAD_INFO(tsk) \
28{ \
29 .task = &tsk, \
30 .flags = 0, \
31 .cpu = 0, \
32 .preempt_count = INIT_PREEMPT_COUNT, \
33 .addr_limit = KERNEL_DS, \
34 .real_thread = NULL, \
35}
36
37#define init_thread_info (init_thread_union.thread_info)
38#define init_stack (init_thread_union.stack)
39
40#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
41/* how to get the thread information struct from C */
42static inline struct thread_info *current_thread_info(void)
43{
44 struct thread_info *ti;
45 unsigned long mask = THREAD_SIZE - 1;
46 void *p;
47
48 asm volatile ("" : "=r" (p) : "0" (&ti));
49 ti = (struct thread_info *) (((unsigned long)p) & ~mask);
50 return ti;
51}
52
53#define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
54
55#endif
56
57#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
58#define TIF_SIGPENDING 1 /* signal pending */
59#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
60#define TIF_RESTART_BLOCK 4
61#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
62#define TIF_SYSCALL_AUDIT 6
63#define TIF_RESTORE_SIGMASK 7
64#define TIF_NOTIFY_RESUME 8
65#define TIF_SECCOMP 9 /* secure computing */
66
67#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
68#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
69#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
70#define _TIF_MEMDIE (1 << TIF_MEMDIE)
71#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
72#define _TIF_SECCOMP (1 << TIF_SECCOMP)
73
74#endif