6fc9f4dbc8
We don't have enouch space to store full VFP context within mcontext stucture. Due to this: - follow i386/amd64 way and store VFP state outside of the mcontext_t but point to it. Use the size of VFP state structure as an 'magic' indicator of the saved VFP state presence. - teach set_mcontext() about this external storage. - for signal delivery, store VFP state to expanded 'struct sigframe'. Submited by: Andrew Gierth (initial version) PR: 217611 MFC after: 2 weeks
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/* $NetBSD: mcontext.h,v 1.4 2003/10/08 22:43:01 thorpej Exp $ */
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/*-
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* Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Klaus Klein and by Jason R. Thorpe of Wasabi Systems, Inc.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_MCONTEXT_H_
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#define _MACHINE_MCONTEXT_H_
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/*
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* General register state
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*/
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#define _NGREG 17
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typedef unsigned int __greg_t;
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typedef __greg_t __gregset_t[_NGREG];
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#define _REG_R0 0
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#define _REG_R1 1
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#define _REG_R2 2
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#define _REG_R3 3
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#define _REG_R4 4
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#define _REG_R5 5
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#define _REG_R6 6
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#define _REG_R7 7
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#define _REG_R8 8
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#define _REG_R9 9
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#define _REG_R10 10
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#define _REG_R11 11
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#define _REG_R12 12
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#define _REG_R13 13
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#define _REG_R14 14
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#define _REG_R15 15
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#define _REG_CPSR 16
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/* Convenience synonyms */
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#define _REG_FP _REG_R11
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#define _REG_SP _REG_R13
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#define _REG_LR _REG_R14
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#define _REG_PC _REG_R15
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/*
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* Floating point register state
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*/
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typedef struct {
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__uint64_t mcv_reg[32];
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__uint32_t mcv_fpscr;
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} mcontext_vfp_t;
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typedef struct {
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__gregset_t __gregs;
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/*
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* Originally, rest of this structure was named __fpu, 35 * 4 bytes
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* long, never accessed from kernel.
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*/
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size_t mc_vfp_size;
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void *mc_vfp_ptr;
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unsigned int mc_spare[33];
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} mcontext_t;
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#define UC_
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#endif /* !_MACHINE_MCONTEXT_H_ */
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