1627f7eb2Smrg/* Support code for fibers and multithreading. 2*4c3eb207Smrg Copyright (C) 2019-2020 Free Software Foundation, Inc. 3627f7eb2Smrg 4627f7eb2SmrgThis file is part of GCC. 5627f7eb2Smrg 6627f7eb2SmrgGCC is free software; you can redistribute it and/or modify it under 7627f7eb2Smrgthe terms of the GNU General Public License as published by the Free 8627f7eb2SmrgSoftware Foundation; either version 3, or (at your option) any later 9627f7eb2Smrgversion. 10627f7eb2Smrg 11627f7eb2SmrgGCC is distributed in the hope that it will be useful, but WITHOUT ANY 12627f7eb2SmrgWARRANTY; without even the implied warranty of MERCHANTABILITY or 13627f7eb2SmrgFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14627f7eb2Smrgfor more details. 15627f7eb2Smrg 16627f7eb2SmrgUnder Section 7 of GPL version 3, you are granted additional 17627f7eb2Smrgpermissions described in the GCC Runtime Library Exception, version 18627f7eb2Smrg3.1, as published by the Free Software Foundation. 19627f7eb2Smrg 20627f7eb2SmrgYou should have received a copy of the GNU General Public License and 21627f7eb2Smrga copy of the GCC Runtime Library Exception along with this program; 22627f7eb2Smrgsee the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23627f7eb2Smrg<http://www.gnu.org/licenses/>. */ 24627f7eb2Smrg 25627f7eb2Smrg#if (__linux__ || __FreeBSD__ || __NetBSD__ || __DragonFly__) && __ELF__ 26627f7eb2Smrg/* 27627f7eb2Smrg * Mark the resulting object file as not requiring execution permissions on 28627f7eb2Smrg * stack memory. The absence of this section would mark the whole resulting 29627f7eb2Smrg * library as requiring an executable stack, making it impossible to 30627f7eb2Smrg * dynamically load druntime on several Linux platforms where this is 31627f7eb2Smrg * forbidden due to security policies. 32627f7eb2Smrg */ 33627f7eb2Smrg .section .note.GNU-stack,"",%progbits 34627f7eb2Smrg#endif 35627f7eb2Smrg 36627f7eb2Smrg/* Let preprocessor tell us if C symbols have a prefix: __USER_LABEL_PREFIX__ */ 37627f7eb2Smrg#ifdef __USER_LABEL_PREFIX__ 38627f7eb2Smrg#define __CONCAT2(a, b) a ## b 39627f7eb2Smrg#define __CONCAT(a, b) __CONCAT2(a, b) 40627f7eb2Smrg#define CSYM(name) __CONCAT(__USER_LABEL_PREFIX__, name) 41627f7eb2Smrg#else 42627f7eb2Smrg#define CSYM(name) name 43627f7eb2Smrg#endif 44