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 #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 mm_segment_t addr_limit; /* thread address space: 26 0-0xBFFFFFFF for user 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 30 them out-of-band */ 31 }; 32 33 #define INIT_THREAD_INFO(tsk) \ 34 { \ 35 .task = &tsk, \ 36 .flags = 0, \ 37 .cpu = 0, \ 38 .preempt_count = INIT_PREEMPT_COUNT, \ 39 .addr_limit = KERNEL_DS, \ 40 .real_thread = NULL, \ 41 } 42 43 /* how to get the thread information struct from C */ 44 static inline struct thread_info *current_thread_info(void) 45 { 46 struct thread_info *ti; 47 unsigned long mask = THREAD_SIZE - 1; 48 void *p; 49 50 asm volatile ("" : "=r" (p) : "0" (&ti)); 51 ti = (struct thread_info *) (((unsigned long)p) & ~mask); 52 return ti; 53 } 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 75