#
# Upstream power patch to increase MINSIGSTKSZ and SIGSTKSZ to
# account for the kernel signal frame size increase.
#
# commit f7c399cff5bd04ee9dc117fb6b0f39597dc047c6
# Author: Alan Modra <amodra@gmail.com>
# Date:   Sat Aug 17 18:37:18 2013 +0930
# 
#     PowerPC SIGSTKSZ
#     http://sourceware.org/ml/libc-alpha/2013-08/msg00093.html
#     
#     This copies the sparc version of sigstack.h, which gives powerpc
#      #define MINSIGSTKSZ     4096
#      #define SIGSTKSZ        16384
#     
#     Before the VSX changes, struct rt_sigframe size was 1920 plus 128 for
#     __SIGNAL_FRAMESIZE giving ppc64 exactly the default MINSIGSTKSZ of
#     2048.
#     
#     After VSX, ucontext increased by 256 bytes.  Oops, we're over
#     MINSIGSTKSZ, so powerpc has been using the wrong value for quite a
#     while.  Add another ucontext for TM and rt_sigframe is now at 3872,
#     giving actual MINSIGSTKSZ of 4000.
#     
#     The glibc testcase that I was looking at was tst-cancel21, which
#     allocates 2*SIGSTKSZ (not because the test is trying to be
#     conservative, but because the test actually has nested signal stack
#     frames).  We blew the allocation by 48 bytes when using current
#     mainline gcc to compile glibc (le ppc64).
#     
#     The required stack depth in _dl_lookup_symbol_x from the top of the
#     next signal frame was 10944 bytes.  I guess you'd want to add 288 to
#     that, implying an actual SIGSTKSZ of 11232.
#     
#         * sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h: New file.
# 
diff --git glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
new file mode 100644
index 0000000..33be9e8
--- /dev/null
+++ glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
@@ -0,0 +1,54 @@
+/* sigstack, sigaltstack definitions.
+   Copyright (C) 1998-2013 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	4096
+
+/* 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;