117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $
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* $FreeBSD$
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*/
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#ifndef _MACHINE_FRAME_H_
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#define _MACHINE_FRAME_H_
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#include <sys/types.h>
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/*
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* We have to save all registers on every trap, because
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* 1. user could attach this process every time
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* 2. we must be able to restore all user registers in case of fork
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* Actually, we do not save the fp registers on trap, since
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* these are not used by the kernel. They are saved only when switching
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* between processes using the FPU.
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*
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* Change ordering to cluster together these register_t's. XXX
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*/
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struct trapframe {
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register_t fixreg[32];
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register_t lr;
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register_t cr;
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register_t xer;
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register_t ctr;
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register_t srr0;
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register_t srr1;
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register_t exc;
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union {
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struct {
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/* dar & dsisr are only filled on a DSI trap */
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register_t dar;
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register_t dsisr;
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} aim;
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struct {
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register_t dear;
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register_t esr;
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register_t dbcr0;
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} booke;
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} cpu;
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};
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/*
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* FRAMELEN is the size of the stack region used by the low-level trap
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* handler. It is the size of its data (trapframe) plus the callframe
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* header (sizeof(struct callframe) - 3 register widths). It must also
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* be 16-byte aligned.
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*/
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#define FRAMELEN roundup(sizeof(struct trapframe) + \
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sizeof(struct callframe) - 3*sizeof(register_t), 16)
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#define trapframe(td) ((td)->td_frame)
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/*
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* Call frame for PowerPC used during fork.
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*/
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#ifdef __powerpc64__
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struct callframe {
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register_t cf_dummy_fp; /* dummy frame pointer */
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register_t cf_cr;
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register_t cf_lr;
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register_t cf_compiler;
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register_t cf_linkeditor;
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register_t cf_toc;
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register_t cf_func;
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register_t cf_arg0;
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register_t cf_arg1;
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register_t _padding; /* Maintain 16-byte alignment */
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};
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#else
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struct callframe {
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register_t cf_dummy_fp; /* dummy frame pointer */
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register_t cf_lr; /* space for link register save */
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register_t cf_func;
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register_t cf_arg0;
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register_t cf_arg1;
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register_t _padding; /* Maintain 16-byte alignment */
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};
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#endif
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/* Definitions for syscalls */
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#define FIRSTARG 3 /* first arg in reg 3 */
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#define NARGREG 8 /* 8 args in regs */
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#define MOREARGS(sp) ((caddr_t)((uintptr_t)(sp) + \
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sizeof(struct callframe) - 3*sizeof(register_t))) /* more args go here */
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#endif /* _MACHINE_FRAME_H_ */
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