kern/linux/linux_threadinfo.hh

   1 /*
   2  * Copyright (c) 2004 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef __KERN_LINUX_LINUX_TREADNIFO_HH__
  30 #define __KERN_LINUX_LINUX_TREADNIFO_HH__
  31
  32 #include "kern/linux/thread_info.hh"
  33 #include "kern/linux/sched.hh"
  34 #include "sim/vptr.hh"
  35
  36 namespace Linux {
  37
  38 class ThreadInfo
  39 {
  40   private:
  41     ExecContext *xc;
  42
  43   public:
  44     ThreadInfo(ExecContext *exec) : xc(exec) {}
  45     ~ThreadInfo() {}
  46
  47     inline VPtr<thread_info>
  48     curThreadInfo()
  49     {
  50         Addr current;
  51
  52         /* Each kernel stack is only 2 pages, the start of which is the
  53          * thread_info struct. So we can get the address by masking off
  54          * the lower 14 bits.
  55          */
  56         current = xc->regs.intRegFile[TheISA::StackPointerReg] & ~0x3fff;
  57         return VPtr<thread_info>(xc, current);
  58     }
  59
  60     inline VPtr<task_struct>
  61     curTaskInfo()
  62     {
  63         Addr task = curThreadInfo()->task;
  64         return VPtr<task_struct>(xc, task);
  65     }
  66
  67     std::string
  68     curTaskName()
  69     {
  70         return curTaskInfo()->name;
  71     }
  72
  73     int32_t
  74     curTaskPID()
  75     {
  76         return curTaskInfo()->pid;
  77     }
  78
  79     uint64_t
  80     curTaskStart()
  81     {
  82         return curTaskInfo()->start;
  83     }
  84 };
  85
  86 /* namespace Linux */ }
  87
  88 #endif // __KERN_LINUX_LINUX_THREADINFO_HH__