diff options
Diffstat (limited to 'lib/libc/arm/sys/getcontext.S')
| -rw-r--r-- | lib/libc/arm/sys/getcontext.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/libc/arm/sys/getcontext.S b/lib/libc/arm/sys/getcontext.S new file mode 100644 index 0000000..e905259 --- /dev/null +++ b/lib/libc/arm/sys/getcontext.S @@ -0,0 +1,63 @@ +/* $NetBSD: getcontext.S,v 1.3 2003/04/05 23:08:52 bjh21 Exp $ */ + +/*- + * Copyright (c) 2001 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Klaus Klein. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); +#include "SYS.h" + +#if defined(SYSLIBC_SCCS) && !defined(lint) + RCSID("$NetBSD: getcontext.S,v 1.3 2003/04/05 23:08:52 bjh21 Exp $") +#endif /* SYSLIBC_SCCS && !lint */ + +#ifdef WEAK_ALIAS +WEAK_ALIAS(getcontext, _getcontext) +#endif + +ENTRY(_getcontext) + mov r2, r0 /* Must save argument pointer. */ + swi SYS_getcontext + bcs PIC_SYM(CERROR, PLT) + str lr, [r2, #(36 + 15*4)] /* Adjust PC. */ +#ifdef SOFTFLOAT + /* Ahem. */ + /* Judging from the softfloat code we should at least save + the exception codes and rounding mode here. */ +#endif + mov r0, #0 + str r0, [r2, #(36 + 0*4)] /* Return 0. */ + mov pc, lr |
