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-rw-r--r--ports/sysdeps/arm/bsd-setjmp.S28
1 files changed, 28 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/bsd-setjmp.S b/ports/sysdeps/arm/bsd-setjmp.S
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+++ b/ports/sysdeps/arm/bsd-setjmp.S
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+/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  ARM version.
+   Copyright (C) 1997, 1998, 2008 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/>.  */
+
+/* This just does a tail-call to `__sigsetjmp (ARG, 1)'.
+   We cannot do it in C because it must be a tail-call, so frame-unwinding
+   in setjmp doesn't clobber the state restored by longjmp.  */
+
+#include <sysdep.h>
+
+ENTRY (setjmp)
+	mov	r1, #1
+	b	PLTJMP(HIDDEN_JUMPTARGET(__sigsetjmp))
+END (setjmp)