121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/* $NetBSD: kgdb_machdep.c,v 1.2 1998/08/20 08:33:42 kleink Exp $ */
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/*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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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* @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
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*/
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/*
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* Machine-dependent part of the KGDB remote "stub"
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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/kgdb.h>
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#include <machine/db_machdep.h>
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#include <machine/pte.h>
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#define INVOKE_KGDB() __asm __volatile("trap #15")
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/*
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* Determine if the memory at va..(va+len) is valid.
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*/
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int
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kgdb_acc(va, ulen)
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vaddr_t va;
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size_t ulen;
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{
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int len, pgoff;
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pt_entry_t *pte;
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len = (int)ulen;
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pgoff = va & PGOFSET;
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va -= pgoff;
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len += pgoff;
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while (len > 0) {
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pte = kvtopte(va);
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if ((*pte & PG_V) == 0)
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return (0);
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va += NBPG;
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len -= NBPG;
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}
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return (1);
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}
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/*
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* Trap into kgdb to wait for debugger to connect,
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* noting on the console why nothing else is going on.
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*/
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void
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kgdb_connect(verbose)
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int verbose;
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{
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if (kgdb_dev < 0)
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return;
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if (verbose)
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printf("kgdb waiting...");
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INVOKE_KGDB();
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if (verbose)
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printf("connected.\n");
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kgdb_debug_panic = 1;
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}
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/*
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* Decide what to do on panic.
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*/
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void
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kgdb_panic()
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{
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if (kgdb_dev >= 0 && kgdb_debug_panic) {
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printf("entering kgdb\n");
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INVOKE_KGDB();
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}
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}
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