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[PATCH 26/29] [AARCH64] Add sigstack.h header for ILP32 reasons.


ILP32 uses the same structure layout for sigaltstack as
LP64 so we need a special header file.

* sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h: New file.
---
 sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h |   71 +++++++++++++++++++++++
 1 files changed, 71 insertions(+), 0 deletions(-)
 create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h

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 0000000..2dd8f6b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
@@ -0,0 +1,71 @@
+/* sigstack, sigaltstack definitions.
+   Copyright (C) 1998, 1999 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	2048
+
+/* System default stack size.  */
+#define SIGSTKSZ	8192
+
+
+/* Alternate, preferred interface.
+   This structure matches the same size and layout
+   for both ILP32 and LP64.  */
+typedef struct sigaltstack
+  {
+#if defined(__ILP32__) && defined(__AARCH64EB__)
+    int __pad_ss_sp;
+#endif
+    void *ss_sp;
+#if defined(__ILP32__) && !defined(__AARCH64EB__)
+    int __pad_ss_sp;
+#endif
+    int ss_flags;
+#if defined(__ILP32__)
+    int __pad_after_ss_flags;
+#endif
+#if defined(__ILP32__) && defined(__AARCH64EB__)
+    int __pad_ss_size;
+#endif
+    size_t ss_size;
+#if defined(__ILP32__) && !defined(__AARCH64EB__)
+    int __pad_ss_size;
+#endif
+  } stack_t;
-- 
1.7.2.5


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