add experimental aarch64 support

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

1 files changed, 46 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/aarch64/crtn.S b/libc/sysdeps/linux/aarch64/crtn.S
new file mode 100644
index 000000000..33d5f3d82
--- /dev/null
+++ b/libc/sysdeps/linux/aarch64/crtn.S
@@ -0,0 +1,46 @@
+/* Special .init and .fini section support for AArch64.
+   Copyright (C) 1995-2016 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.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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/>.  */
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+   corresponding to the prologues in crti.S. */
+
+	.section .init,"ax",%progbits
+	ldp	x29, x30, [sp], 16
+	RET
+
+	.section .fini,"ax",%progbits
+	ldp	x29, x30, [sp], 16
+	RET