1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef __UM_THREAD_INFO_H 7*4882a593Smuzhiyun #define __UM_THREAD_INFO_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER 10*4882a593Smuzhiyun #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE) 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <asm/types.h> 15*4882a593Smuzhiyun #include <asm/page.h> 16*4882a593Smuzhiyun #include <asm/segment.h> 17*4882a593Smuzhiyun #include <sysdep/ptrace_user.h> 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun struct thread_info { 20*4882a593Smuzhiyun struct task_struct *task; /* main task structure */ 21*4882a593Smuzhiyun unsigned long flags; /* low level flags */ 22*4882a593Smuzhiyun __u32 cpu; /* current CPU */ 23*4882a593Smuzhiyun int preempt_count; /* 0 => preemptable, 24*4882a593Smuzhiyun <0 => BUG */ 25*4882a593Smuzhiyun mm_segment_t addr_limit; /* thread address space: 26*4882a593Smuzhiyun 0-0xBFFFFFFF for user 27*4882a593Smuzhiyun 0-0xFFFFFFFF for kernel */ 28*4882a593Smuzhiyun struct thread_info *real_thread; /* Points to non-IRQ stack */ 29*4882a593Smuzhiyun unsigned long aux_fp_regs[FP_SIZE]; /* auxiliary fp_regs to save/restore 30*4882a593Smuzhiyun them out-of-band */ 31*4882a593Smuzhiyun }; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #define INIT_THREAD_INFO(tsk) \ 34*4882a593Smuzhiyun { \ 35*4882a593Smuzhiyun .task = &tsk, \ 36*4882a593Smuzhiyun .flags = 0, \ 37*4882a593Smuzhiyun .cpu = 0, \ 38*4882a593Smuzhiyun .preempt_count = INIT_PREEMPT_COUNT, \ 39*4882a593Smuzhiyun .addr_limit = KERNEL_DS, \ 40*4882a593Smuzhiyun .real_thread = NULL, \ 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun /* how to get the thread information struct from C */ current_thread_info(void)44*4882a593Smuzhiyunstatic inline struct thread_info *current_thread_info(void) 45*4882a593Smuzhiyun { 46*4882a593Smuzhiyun struct thread_info *ti; 47*4882a593Smuzhiyun unsigned long mask = THREAD_SIZE - 1; 48*4882a593Smuzhiyun void *p; 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun asm volatile ("" : "=r" (p) : "0" (&ti)); 51*4882a593Smuzhiyun ti = (struct thread_info *) (((unsigned long)p) & ~mask); 52*4882a593Smuzhiyun return ti; 53*4882a593Smuzhiyun } 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun #endif 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 58*4882a593Smuzhiyun #define TIF_SIGPENDING 1 /* signal pending */ 59*4882a593Smuzhiyun #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 60*4882a593Smuzhiyun #define TIF_NOTIFY_SIGNAL 3 /* signal notifications exist */ 61*4882a593Smuzhiyun #define TIF_RESTART_BLOCK 4 62*4882a593Smuzhiyun #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ 63*4882a593Smuzhiyun #define TIF_SYSCALL_AUDIT 6 64*4882a593Smuzhiyun #define TIF_RESTORE_SIGMASK 7 65*4882a593Smuzhiyun #define TIF_NOTIFY_RESUME 8 66*4882a593Smuzhiyun #define TIF_SECCOMP 9 /* secure computing */ 67*4882a593Smuzhiyun #define TIF_SINGLESTEP 10 /* single stepping userspace */ 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 70*4882a593Smuzhiyun #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 71*4882a593Smuzhiyun #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 72*4882a593Smuzhiyun #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) 73*4882a593Smuzhiyun #define _TIF_MEMDIE (1 << TIF_MEMDIE) 74*4882a593Smuzhiyun #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 75*4882a593Smuzhiyun #define _TIF_SECCOMP (1 << TIF_SECCOMP) 76*4882a593Smuzhiyun #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun #endif 79