[Feature][T106]ZXW P56U09 code
Only Configure: Yes
Affected branch: master
Affected module: unknow
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: No
Doc Update: No
Change-Id: I3cbd8b420271eb20c2b40ebe5c78f83059cd42f3
diff --git a/ap/libc/glibc/glibc-2.23/sysdeps/mach/hurd/sigaltstack.c b/ap/libc/glibc/glibc-2.23/sysdeps/mach/hurd/sigaltstack.c
new file mode 100644
index 0000000..316540a
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/sysdeps/mach/hurd/sigaltstack.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 1992-2016 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/>. */
+
+#include <errno.h>
+#include <hurd.h>
+#include <hurd/signal.h>
+
+/* Run signals handlers on the stack specified by SS (if not NULL).
+ If OSS is not NULL, it is filled in with the old signal stack status. */
+int
+__sigaltstack (const struct sigaltstack *argss, struct sigaltstack *oss)
+{
+ struct hurd_sigstate *s;
+ struct sigaltstack ss, old;
+
+ /* Fault before taking any locks. */
+ if (argss != NULL)
+ ss = *argss;
+ if (oss != NULL)
+ *(volatile struct sigaltstack *) oss = *oss;
+
+ s = _hurd_self_sigstate ();
+ __spin_lock (&s->lock);
+
+ if (argss != NULL &&
+ (ss.ss_flags & SS_DISABLE) && (s->sigaltstack.ss_flags & SS_ONSTACK))
+ {
+ /* Can't disable a stack that is in use. */
+ __spin_unlock (&s->lock);
+ errno = EINVAL;
+ return -1;
+ }
+
+ old = s->sigaltstack;
+
+ if (argss != NULL)
+ s->sigaltstack = ss;
+
+ __spin_unlock (&s->lock);
+
+ if (oss != NULL)
+ *oss = old;
+
+ return 0;
+}
+weak_alias (__sigaltstack, sigaltstack)