1  /* Machine-specific function to return the stack pointer.  i386 version.
       2     Copyright (C) 1994-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library;  if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _MACHINE_SP_H
      20  #define _MACHINE_SP_H
      21  
      22  /* Return the current stack pointer.  */
      23  
      24  #define __thread_stack_pointer() ({					      \
      25    register uintptr_t __sp__ asm("esp");					      \
      26    __sp__;								      \
      27  })
      28  
      29  #endif /* machine-sp.h */