67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
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/* $NetBSD: svc32.S,v 1.1 1996/01/31 23:18:38 mark Exp $ */
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/*
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* Copyright (c) 1994,1955 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES * LOSS OF USE, DATA, OR PROFITS * OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* RiscBSD kernel project
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*
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* svc32.s
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*
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* Created : 12/09/94
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* Last updated : 12/09/94
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*
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* Based on kate/library/svc32.s
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*
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* $Id: svc32.S,v 1.1 1996/01/31 23:18:38 mark Exp $
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*/
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#include "regs.h"
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#include <machine/cpu.h>
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/*
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* Switches from SVC26 mode to SVC32 mode
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*/
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.text
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.global _SVC32
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_SVC32:
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mrs r1, cpsr_all
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bic r1, r1, #(PSR_MODE)
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orr r1, r1, #(PSR_SVC32_MODE)
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msr cpsr_all, r1
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bic lr, lr, #0xfc000000
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mov pc, lr
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