define NO_EXEC_STACK_DIRECTIVE

Author: nickdesaulniers

libc/src/__support/assembly.h

@@ -0,0 +1,22 @@
+//===-- assembly.h - libc assembler support macros based on compiler-rt's -===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_LIBC_SRC___SUPPORT_ASSEMBLY_H
+#define LLVM_LIBC_SRC___SUPPORT_ASSEMBLY_H
+
+#ifndef __ASSEMBLER__
+#error "No not include assembly.h in non-asm sources"
+#endif
+
+#if defined(ELF) && (defined(__GNU__) || defined(__FreeBSD__) ||               \
+                     defined(__Fuchsia__) || defined(__linux__))
+#define NO_EXEC_STACK_DIRECTIVE .section.note.GNU - stack, "", % progbits
+#else
+#define NO_EXEC_STACK_DIRECTIVE
+#endif
+
+#endif // LLVM_LIBC_SRC___SUPPORT_ASSEMBLY_H

libc/src/setjmp/x86_64/setjmp.S

@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "src/__support/assembly.h"
+
 #define paste(ns) _ZN22 ## ns ## 6setjmpEP9__jmp_buf
 #define expand(x) paste(x)
 #define LIBC_NAMESPACE_setjump expand(LIBC_NAMESPACE)
@@ -47,4 +49,4 @@ LIBC_NAMESPACE_setjump:
 .size setjump, . - setjump
 .size LIBC_NAMESPACE_setjump, . - LIBC_NAMESPACE_setjump
 
-.section .note.GNU-stack, "", @progbits
+NO_EXEC_STACK_DIRECTIVE