1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 #ifndef __UM_THREAD_INFO_H
7 #define __UM_THREAD_INFO_H
9 #define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
10 #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
14 #include <asm/types.h>
16 #include <asm/segment.h>
17 #include <sysdep/ptrace_user.h>
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,
25 mm_segment_t addr_limit; /* thread address space:
27 0-0xFFFFFFFF for kernel */
28 struct thread_info *real_thread; /* Points to non-IRQ stack */
29 unsigned long aux_fp_regs[FP_SIZE]; /* auxiliary fp_regs to save/restore
33 #define INIT_THREAD_INFO(tsk) \
38 .preempt_count = INIT_PREEMPT_COUNT, \
39 .addr_limit = KERNEL_DS, \
40 .real_thread = NULL, \
43 /* how to get the thread information struct from C */
44 static inline struct thread_info *current_thread_info(void)
46 struct thread_info *ti;
47 unsigned long mask = THREAD_SIZE - 1;
50 asm volatile ("" : "=r" (p) : "0" (&ti));
51 ti = (struct thread_info *) (((unsigned long)p) & ~mask);
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_NOTIFY_SIGNAL 3 /* signal notifications exist */
61 #define TIF_RESTART_BLOCK 4
62 #define TIF_MEMDIE 5 /* is terminating due to OOM killer */
63 #define TIF_SYSCALL_AUDIT 6
64 #define TIF_RESTORE_SIGMASK 7
65 #define TIF_NOTIFY_RESUME 8
66 #define TIF_SECCOMP 9 /* secure computing */
67 #define TIF_SINGLESTEP 10 /* single stepping userspace */
69 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
70 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
71 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
72 #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
73 #define _TIF_MEMDIE (1 << TIF_MEMDIE)
74 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
75 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
76 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)