1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2020 Oxide Computer Company
14 */
15
16 #include <sys/ccompile.h>
17
18 /*
19 * To impement gcc's stack protector library, the compiler emits a function call
20 * to a symbol which can be called absolutely. As a result, to make that happen,
21 * we mimic what gcc does with libssp and create an archive file that can be
22 * used in the specs file to pull this in directly. This is a bit of a pain, but
23 * that's the best we can do given the architecture that we have.
24 *
25 * Warning: This is a static archive. Nothing beyond the call for
26 * __stack_chk_fail_local and calls to committed interfaces should be here. As
27 * this implementation will be linked into programs, one should exercise care to
28 * make sure we don't expose anything else here.
29 */
30
31 extern void __stack_chk_fail(void);
32
33 void __HIDDEN
__stack_chk_fail_local(void)34 __stack_chk_fail_local(void)
35 {
36 __stack_chk_fail();
37 }
38