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/*-
* Copyright (c) 1997 Berkeley Software Design, 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.
* 3. Berkeley Software Design Inc's name may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``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 BERKELEY SOFTWARE DESIGN INC 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.
*
* from: BSDI: trap.c,v 1.17.2.9 1999/10/19 15:29:52 cp Exp
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ktr.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <machine/frame.h>
int
rwindow_load(struct proc *p, struct trapframe *tf, int n)
{
struct rwindow rw;
u_long usp;
int error;
int i;
/*
* In case current window is still only on-chip, push it out;
* if it cannot get all the way out, we cannot continue either.
*/
if ((error = rwindow_save(p)) != 0)
return (error);
usp = tf->tf_out[6];
CTR3(KTR_TRAP, "rwindow_load: p=%p (%s) n=%d",
p, p->p_comm, n);
for (i = 0; i < n; i++) {
CTR1(KTR_TRAP, "rwindow_load: usp=%#lx", usp);
usp += SPOFF;
error = copyin((void *)usp, &rw, sizeof rw);
usp = rw.rw_in[6];
}
CTR1(KTR_TRAP, "rwindow_load: error=%d", error);
return (error);
}
int
rwindow_save(struct proc *p)
{
struct rwindow *rw;
struct pcb *pcb;
u_long *ausp;
u_long usp;
int error;
int i;
flushw();
pcb = &p->p_addr->u_pcb;
i = pcb->pcb_nsaved;
CTR3(KTR_TRAP, "rwindow_save: p=%p (%s) nsaved=%d", p, p->p_comm, i);
if (i == 0)
return (0);
ausp = pcb->pcb_rwsp;
rw = pcb->pcb_rw;
error = 0;
do {
usp = *ausp;
CTR1(KTR_TRAP, "rwindow_save: usp=%#lx", usp);
usp += SPOFF;
error = copyout(rw, (void *)usp, sizeof *rw);
if (error)
break;
ausp++;
rw++;
} while (--i > 0);
CTR1(KTR_TRAP, "rwindow_save: error=%d", error);
if (error == 0)
pcb->pcb_nsaved = 0;
return (error);
}
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