kernel/include/arch-x64/current.h

   1 // This file should only be included by include/kern/thread.h.
   2
   3 #ifndef _ARCH_CURRENT_H
   4 #define _ARCH_CURRENT_H
   5
   6 namespace Arch {
   7         static inline Threads::Thread *get_current_thread() __attribute__((const));
   8
   9         static inline Threads::Thread *get_current_thread()
  10         {
  11                 u64 ret;
  12
  13                 asm("movq %%rsp, %0;"
  14                     "andq $~0xfff, %0" :
  15                     "=r" (ret));
  16
  17                 ret += ArchThread::size - Threads::thread_size;
  18
  19                 return reinterpret_cast<Threads::Thread *>(ret);
  20         }
  21 }
  22
  23 #endif