1 /* Machine-specific function to return the stack pointer. i386 version. 2 Copyright (C) 1994-2022 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 uintptr_t __sp__; \ 26 __asm__ ("movl %%esp, %0" : "=r" (__sp__)); \ 27 __sp__; \ 28 }) 29 30 #endif /* machine-sp.h */ 31