From b763f6ae859ecea70a5dacb8ad45c71d5f667e2e Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Tue, 30 Sep 2014 12:41:11 +0200
Subject: [PATCH] aarch64: Increase MINSIGSTKSZ and SIGSTKSZ (bug 16850)

---
 ChangeLog                                     |  5 ++
 NEWS                                          | 12 ++---
 .../unix/sysv/linux/aarch64/bits/sigstack.h   | 54 +++++++++++++++++++
 3 files changed, 65 insertions(+), 6 deletions(-)
 create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h

diff --git a/ChangeLog b/ChangeLog
index c687d1356f..2a7f505a10 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-04-02  Andreas Schwab  <schwab@suse.de>
+
+	[BZ #16850]
+	* sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h: New file.
+
 2015-04-02  Mel Gorman  <mgorman@suse.de>
 
 	[BZ #17195]
diff --git a/NEWS b/NEWS
index dec42d8a15..14d54d6217 100644
--- a/NEWS
+++ b/NEWS
@@ -10,12 +10,12 @@ Version 2.22
 * The following bugs are resolved with this release:
 
   4719, 13064, 14094, 14841, 14906, 15319, 15467, 15790, 15969, 16351,
-  16512, 16560, 16783, 17090, 17195, 17269, 17523, 17542, 17569, 17588,
-  17620, 17621, 17628, 17631, 17711, 17776, 17779, 17792, 17836, 17912,
-  17916, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987,
-  17991, 17996, 17998, 17999, 18019, 18020, 18029, 18030, 18032, 18036,
-  18038, 18039, 18042, 18043, 18046, 18047, 18068, 18080, 18093, 18100,
-  18104, 18110, 18111, 18128, 18138, 18185.
+  16512, 16560, 16783, 16850, 17090, 17195, 17269, 17523, 17542, 17569,
+  17588, 17620, 17621, 17628, 17631, 17711, 17776, 17779, 17792, 17836,
+  17912, 17916, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978,
+  17987, 17991, 17996, 17998, 17999, 18019, 18020, 18029, 18030, 18032,
+  18036, 18038, 18039, 18042, 18043, 18046, 18047, 18068, 18080, 18093,
+  18100, 18104, 18110, 18111, 18128, 18138, 18185.
 
 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
   for LD and GD on x86 and x86-64, has been implemented.  You will need
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h b/sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
new file mode 100644
index 0000000000..8f2fb76e3e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
@@ -0,0 +1,54 @@
+/* sigstack, sigaltstack definitions.
+   Copyright (C) 2015 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/>.  */
+
+#ifndef _SIGNAL_H
+# error "Never include this file directly.  Use <signal.h> instead"
+#endif
+
+
+/* Structure describing a signal stack (obsolete).  */
+struct sigstack
+  {
+    void *ss_sp;		/* Signal stack pointer.  */
+    int ss_onstack;		/* Nonzero if executing on this stack.  */
+  };
+
+
+/* Possible values for `ss_flags.'.  */
+enum
+{
+  SS_ONSTACK = 1,
+#define SS_ONSTACK	SS_ONSTACK
+  SS_DISABLE
+#define SS_DISABLE	SS_DISABLE
+};
+
+/* Minimum stack size for a signal handler.  */
+#define MINSIGSTKSZ	5120
+
+/* System default stack size.  */
+#define SIGSTKSZ	16384
+
+
+/* Alternate, preferred interface.  */
+typedef struct sigaltstack
+  {
+    void *ss_sp;
+    int ss_flags;
+    size_t ss_size;
+  } stack_t;