106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*-
|
|
* 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>
|
|
|
|
CTASSERT((1 << RW_SHIFT) == sizeof(struct rwindow));
|
|
CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
|
|
|
|
int
|
|
rwindow_load(struct thread *td, struct trapframe *tf, int n)
|
|
{
|
|
struct rwindow rw;
|
|
u_long usp;
|
|
int error;
|
|
int i;
|
|
|
|
CTR3(KTR_TRAP, "rwindow_load: td=%p (%s) n=%d",
|
|
td, td->td_proc->p_comm, n);
|
|
|
|
/*
|
|
* 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(td)) != 0)
|
|
return (error);
|
|
usp = tf->tf_out[6];
|
|
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 thread *td)
|
|
{
|
|
struct rwindow *rw;
|
|
struct pcb *pcb;
|
|
u_long *ausp;
|
|
u_long usp;
|
|
int error;
|
|
int i;
|
|
|
|
pcb = td->td_pcb;
|
|
CTR3(KTR_TRAP, "rwindow_save: td=%p (%s) nsaved=%d", td,
|
|
td->td_proc->p_comm, pcb->pcb_nsaved);
|
|
|
|
flushw();
|
|
if ((i = pcb->pcb_nsaved) == 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);
|
|
}
|