S/390: Make jmp_buf extendible.

1 files changed, 111 insertions, 0 deletions

diff --git a/sysdeps/s390/v1-setjmp.h b/sysdeps/s390/v1-setjmp.h
new file mode 100644
index 0000000000..a4a6b7640f
--- /dev/null
+++ b/sysdeps/s390/v1-setjmp.h
@@ -0,0 +1,111 @@
+/* Copyright (C) 1991-2013 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/>.  */
+
+/*
+ *	ISO C99 Standard: 7.13 Nonlocal jumps	<setjmp.h>
+ */
+
+#ifndef	_V1_SETJMP_H
+#define	_V1_SETJMP_H	1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+#define __V1_JMPBUF
+#define _SETJMP_H
+#include <bits/setjmp.h>		/* Get `__jmp_buf'.  */
+
+#ifndef _ASM
+
+#include <bits/sigset.h>		/* Get `__sigset_t'.  */
+
+
+/* Calling environment, plus possibly a saved signal mask.  */
+typedef struct __v1__jmp_buf_tag
+  {
+    /* NOTE: The machine-dependent definitions of `__sigsetjmp'
+       assume that a `jmp_buf' begins with a `__jmp_buf' and that
+       `__mask_was_saved' follows it.  Do not move these members
+       or add others before it.  */
+    __jmp_buf __jmpbuf;		/* Calling environment.  */
+    int __mask_was_saved;	/* Saved the signal mask?  */
+    __sigset_t __saved_mask;	/* Saved signal mask.  */
+  } __v1__jmp_buf[1];
+
+
+/* Store the calling environment in ENV, also saving the signal mask.
+   Return 0.  */
+extern int __v1setjmp (__v1__jmp_buf __env);
+
+/* Store the calling environment in ENV, also saving the
+   signal mask if SAVEMASK is nonzero.  Return 0.
+   This is the internal name for `sigsetjmp'.  */
+extern int __v1__sigsetjmp (struct __v1__jmp_buf_tag __env[1],
+			       int __savemask);
+
+/* Store the calling environment in ENV, not saving the signal mask.
+   Return 0.  */
+extern int __v1_setjmp (struct __v1__jmp_buf_tag __env[1]);
+
+/* Jump to the environment saved in ENV, making the
+   `setjmp' call there return VAL, or 1 if VAL is 0.  */
+extern void __v1longjmp (struct __v1__jmp_buf_tag __env[1], int __val)
+     __attribute__ ((__noreturn__));
+
+/* Same.  Usually `_longjmp' is used with `_setjmp', which does not save
+   the signal mask.  But it is how ENV was saved that determines whether
+   `longjmp' restores the mask; `_longjmp' is just an alias.  */
+extern void __v1_longjmp (struct __v1__jmp_buf_tag __env[1], int __val)
+     __attribute__ ((__noreturn__));
+
+/* Use the same type for `jmp_buf' and `sigjmp_buf'.
+   The `__mask_was_saved' flag determines whether
+   or not `longjmp' will restore the signal mask.  */
+typedef struct __v1__jmp_buf_tag __v1__sigjmp_buf[1];
+
+/* Jump to the environment saved in ENV, making the
+   sigsetjmp call there return VAL, or 1 if VAL is 0.
+   Restore the signal mask if that sigsetjmp call saved it.
+   This is just an alias `longjmp'.  */
+extern void __v1siglongjmp (__v1__sigjmp_buf __env, int __val)
+     __attribute__ ((__noreturn__));
+
+/* Internal machine-dependent function to restore context sans signal mask.  */
+extern void __v1__longjmp (__jmp_buf __env, int __val)
+     __attribute__ ((__noreturn__));
+
+/* Internal function to possibly save the current mask of blocked signals
+   in ENV, and always set the flag saying whether or not it was saved.
+   This is used by the machine-dependent definition of `__sigsetjmp'.
+   Always returns zero, for convenience.  */
+extern int __v1__sigjmp_save (__v1__jmp_buf __env, int __savemask);
+
+extern void _longjmp_unwind (__v1__jmp_buf env, int val);
+
+extern void __v1__libc_siglongjmp (__v1__sigjmp_buf env, int val)
+          __attribute__ ((noreturn));
+
+extern void __v1__libc_longjmp (__v1__sigjmp_buf env, int val)
+     __attribute__ ((noreturn));
+
+libc_hidden_proto (__v1__libc_longjmp)
+libc_hidden_proto (__v1_setjmp)
+libc_hidden_proto (__v1__sigsetjmp)
+#endif /* !_ASM */
+
+#endif /* ifndef _V1_SETJMP_H */