add experimental aarch64 support

Ported over from GNU C Library and runtime tested in Qemu.

1 files changed, 33 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/aarch64/bits/stackinfo.h b/libc/sysdeps/linux/aarch64/bits/stackinfo.h
new file mode 100644
index 000000000..78f326203
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/bits/stackinfo.h
@@ -0,0 +1,33 @@
+/* Copyright (C) 2001-2016 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* This file contains a bit of information about the stack allocation
+   of the processor.  */
+
+#ifndef _STACKINFO_H
+#define _STACKINFO_H	1
+
+#include <elf.h>
+
+/* On AArch64 the stack grows down.  */
+#define _STACK_GROWS_DOWN	1
+
+/* Default to a non-executable stack. */
+#define DEFAULT_STACK_PERMS (PF_R|PF_W)
+
+#endif	/* stackinfo.h */