2 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Berkeley Software Design Inc's name may not be used to endorse or
13 * promote products derived from this software without specific prior
16 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * from: BSDI: trap.c,v 1.17.2.9 1999/10/19 15:29:52 cp Exp
32 #include <sys/param.h>
33 #include <sys/systm.h>
37 #include <machine/frame.h>
38 #include <machine/pcb.h>
40 CTASSERT((1 << RW_SHIFT) == sizeof(struct rwindow));
43 rwindow_load(struct thread *td, struct trapframe *tf, int n)
50 CTR3(KTR_TRAP, "rwindow_load: td=%p (%s) n=%d",
51 td, td->td_proc->p_comm, n);
54 * In case current window is still only on-chip, push it out;
55 * if it cannot get all the way out, we cannot continue either.
57 if ((error = rwindow_save(td)) != 0)
60 for (i = 0; i < n; i++) {
61 CTR1(KTR_TRAP, "rwindow_load: usp=%#lx", usp);
63 if ((error = (usp & 0x7)) != 0)
65 error = copyin((void *)usp, &rw, sizeof rw);
68 CTR1(KTR_TRAP, "rwindow_load: error=%d", error);
69 return (error == 0 ? 0 : SIGILL);
73 rwindow_save(struct thread *td)
83 CTR3(KTR_TRAP, "rwindow_save: td=%p (%s) nsaved=%d", td,
84 td->td_proc->p_comm, pcb->pcb_nsaved);
87 KASSERT(pcb->pcb_nsaved < MAXWIN,
88 ("rwindow_save: pcb_nsaved > MAXWIN"));
89 if ((i = pcb->pcb_nsaved) == 0)
96 CTR1(KTR_TRAP, "rwindow_save: usp=%#lx", usp);
98 if ((error = (usp & 0x7)) != 0)
100 error = copyout(rw, (void *)usp, sizeof *rw);
106 CTR1(KTR_TRAP, "rwindow_save: error=%d", error);
109 return (error == 0 ? 0 : SIGILL);