111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*-
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* Copyright (c) 1997 Berkeley Software Design, Inc. 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. Berkeley Software Design Inc's name may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: BSDI: trap.c,v 1.17.2.9 1999/10/19 15:29:52 cp Exp
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ktr.h>
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#include <sys/proc.h>
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#include <machine/frame.h>
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#include <machine/pcb.h>
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CTASSERT((1 << RW_SHIFT) == sizeof(struct rwindow));
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int
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rwindow_load(struct thread *td, struct trapframe *tf, int n)
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{
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struct rwindow rw;
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u_long usp;
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int error;
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int i;
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CTR3(KTR_TRAP, "rwindow_load: td=%p (%s) n=%d",
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td, td->td_proc->p_comm, n);
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/*
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* In case current window is still only on-chip, push it out;
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* if it cannot get all the way out, we cannot continue either.
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*/
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if ((error = rwindow_save(td)) != 0)
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return (error);
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usp = tf->tf_out[6];
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for (i = 0; i < n; i++) {
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CTR1(KTR_TRAP, "rwindow_load: usp=%#lx", usp);
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usp += SPOFF;
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if ((error = (usp & 0x7)) != 0)
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break;
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error = copyin((void *)usp, &rw, sizeof rw);
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usp = rw.rw_in[6];
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}
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CTR1(KTR_TRAP, "rwindow_load: error=%d", error);
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return (error == 0 ? 0 : SIGILL);
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}
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int
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rwindow_save(struct thread *td)
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{
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struct rwindow *rw;
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struct pcb *pcb;
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u_long *ausp;
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u_long usp;
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int error;
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int i;
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pcb = td->td_pcb;
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CTR3(KTR_TRAP, "rwindow_save: td=%p (%s) nsaved=%d", td,
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td->td_proc->p_comm, pcb->pcb_nsaved);
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flushw();
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KASSERT(pcb->pcb_nsaved < MAXWIN,
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("rwindow_save: pcb_nsaved > MAXWIN"));
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if ((i = pcb->pcb_nsaved) == 0)
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return (0);
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ausp = pcb->pcb_rwsp;
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rw = pcb->pcb_rw;
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error = 0;
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do {
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usp = *ausp;
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CTR1(KTR_TRAP, "rwindow_save: usp=%#lx", usp);
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usp += SPOFF;
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if ((error = (usp & 0x7)) != 0)
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break;
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error = copyout(rw, (void *)usp, sizeof *rw);
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if (error)
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break;
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ausp++;
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rw++;
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} while (--i > 0);
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CTR1(KTR_TRAP, "rwindow_save: error=%d", error);
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if (error == 0)
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pcb->pcb_nsaved = 0;
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return (error == 0 ? 0 : SIGILL);
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}
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