diff options
Diffstat (limited to 'kernel/arch/arm/contextspfunc.S')
| -rw-r--r-- | kernel/arch/arm/contextspfunc.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/kernel/arch/arm/contextspfunc.S b/kernel/arch/arm/contextspfunc.S new file mode 100644 index 000000000000..cf7fec19fb2a --- /dev/null +++ b/kernel/arch/arm/contextspfunc.S @@ -0,0 +1,51 @@ +/* $NetBSD: contextspfunc.S,v 1.2 2025/05/07 16:26:47 uwe Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * 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. + * + * 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. + */ + +#define _LOCORE + +#include <machine/asm.h> + +RCSID("$NetBSD: contextspfunc.S,v 1.2 2025/05/07 16:26:47 uwe Exp $") + +/* + * contextspfunc() + * + * makecontext(3) function. Store the stack pointer on entry at + * the global variable contextsp and call contextdone. + */ +ENTRY(contextspfunc) +0: GOT_INIT(r0, .Lgot) + mov r1, sp + GOT_GET(r2, r0, .Lcontextsp) + str r1, [r2] + b PLT_SYM(_C_LABEL(contextdone)) + + GOT_INITSYM(.Lgot, 0b) +.Lcontextsp: + .word GOT_SYM(contextsp) +END(contextspfunc) |