Fixup setjmp and longjmp so they behave themselves properly now

on both x86 and arm...
 -Erik

1 files changed, 34 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/arm/bsd-_setjmp.S b/libc/sysdeps/linux/arm/bsd-_setjmp.S
new file mode 100644
index 000000000..7f092c18b
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bsd-_setjmp.S
@@ -0,0 +1,34 @@
+/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'.  ARM version.
+   Copyright (C) 1997, 1998 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* 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.  */
+
+#define _SETJMP_H
+#define _ASM
+#include <bits/setjmp.h>
+
+.globl _setjmp;
+.type _setjmp,%function
+.align 4;
+_setjmp:
+	mov	r1, #0
+	b	__sigsetjmp (PLT)
+.size _setjmp,.-_setjmp;