1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 */
5
6 #ifndef __UM_THREAD_INFO_H
7 #define __UM_THREAD_INFO_H
8
9 #define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
10 #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
11
12 #ifndef __ASSEMBLY__
13
14 #include <asm/types.h>
15 #include <asm/page.h>
16 #include <asm/segment.h>
17 #include <sysdep/ptrace_user.h>
18
19 struct thread_info {
20 struct task_struct *task; /* main task structure */
21 unsigned long flags; /* low level flags */
22 __u32 cpu; /* current CPU */
23 int preempt_count; /* 0 => preemptable,
24 <0 => BUG */
25 struct thread_info *real_thread; /* Points to non-IRQ stack */
26 unsigned long aux_fp_regs[FP_SIZE]; /* auxiliary fp_regs to save/restore
27 them out-of-band */
28 };
29
30 #define INIT_THREAD_INFO(tsk) \
31 { \
32 .task = &tsk, \
33 .flags = 0, \
34 .cpu = 0, \
35 .preempt_count = INIT_PREEMPT_COUNT, \
36 .real_thread = NULL, \
37 }
38
39 /* how to get the thread information struct from C */
40 static inline struct thread_info *current_thread_info(void)
41 {
42 struct thread_info *ti;
43 unsigned long mask = THREAD_SIZE - 1;
44 void *p;
45
46 asm volatile ("" : "=r" (p) : "" (&ti));
47 ti = (struct thread_info *) (((unsigned long)p) & ~mask);
48 return ti;
49 }
50
51 #endif
52
53 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
54 #define TIF_SIGPENDING 1 /* signal pending */
55 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
56 #define TIF_NOTIFY_SIGNAL 3 /* signal notifications exist */
57 #define TIF_RESTART_BLOCK 4
58 #define TIF_MEMDIE 5 /* is terminating due to OOM killer */
59 #define TIF_SYSCALL_AUDIT 6
60 #define TIF_RESTORE_SIGMASK 7
61 #define TIF_NOTIFY_RESUME 8
62 #define TIF_SECCOMP 9 /* secure computing */
63 #define TIF_SINGLESTEP 10 /* single stepping userspace */
64
65 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
66 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
67 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
68 #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
69 #define _TIF_MEMDIE (1 << TIF_MEMDIE)
70 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
71 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
72 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
73
74 #endif
75
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