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/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*
* $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $
* $FreeBSD$
*/
#ifndef _MACHINE_FRAME_H_
#define _MACHINE_FRAME_H_
#include <sys/types.h>
/*
* We have to save all registers on every trap, because
* 1. user could attach this process every time
* 2. we must be able to restore all user registers in case of fork
* Actually, we do not save the fp registers on trap, since
* these are not used by the kernel. They are saved only when switching
* between processes using the FPU.
*
* Change ordering to cluster together these register_t's. XXX
*/
struct trapframe {
register_t fixreg[32];
register_t lr;
register_t cr;
register_t xer;
register_t ctr;
register_t srr0;
register_t srr1;
register_t exc;
register_t dar; /* DAR/DEAR filled in on DSI traps */
union {
struct {
/* dsisr only filled on a DSI trap */
register_t dsisr;
} aim;
struct {
register_t esr;
register_t dbcr0;
} booke;
} cpu;
};
/*
* FRAMELEN is the size of the stack region used by the low-level trap
* handler. It is the size of its data (trapframe) plus the callframe
* header (sizeof(struct callframe) - 3 register widths). It must also
* be 16-byte aligned.
*/
#define FRAMELEN roundup(sizeof(struct trapframe) + \
sizeof(struct callframe) - 3*sizeof(register_t), 16)
#define trapframe(td) ((td)->td_frame)
/*
* Call frame for PowerPC used during fork.
*/
#ifdef __powerpc64__
struct callframe {
register_t cf_dummy_fp; /* dummy frame pointer */
register_t cf_cr;
register_t cf_lr;
register_t cf_compiler;
register_t cf_linkeditor;
register_t cf_toc;
register_t cf_func;
register_t cf_arg0;
register_t cf_arg1;
register_t _padding; /* Maintain 16-byte alignment */
};
#else
struct callframe {
register_t cf_dummy_fp; /* dummy frame pointer */
register_t cf_lr; /* space for link register save */
register_t cf_func;
register_t cf_arg0;
register_t cf_arg1;
register_t _padding; /* Maintain 16-byte alignment */
};
#endif
/* Definitions for syscalls */
#define FIRSTARG 3 /* first arg in reg 3 */
#define NARGREG 8 /* 8 args in regs */
#endif /* _MACHINE_FRAME_H_ */
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