117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/* $NetBSD: exception.c,v 1.1 2011/10/30 20:42:09 phx Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2011 Frank Wille.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Frank Wille for The NetBSD Project.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 THE FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <lib/libsa/stand.h>
|
|
#include <lib/libsa/loadfile.h>
|
|
#include <lib/libkern/libkern.h>
|
|
|
|
#include "globals.h"
|
|
|
|
#ifdef DEBUG
|
|
struct cpu_state {
|
|
uint32_t gpr[32];
|
|
uint32_t cr, xer, lr, ctr;
|
|
uint32_t srr0, srr1, dar, dsisr;
|
|
uint32_t dmiss, dcmp, hash1, hash2;
|
|
uint32_t imiss, icmp, rpa;
|
|
};
|
|
|
|
void init_vectors(void); /* called from early startup */
|
|
void exception_handler(unsigned, struct cpu_state *);
|
|
|
|
|
|
void
|
|
init_vectors(void)
|
|
{
|
|
extern uint8_t trap[], trap_end[];
|
|
uint8_t *exc;
|
|
uint32_t *ip;
|
|
|
|
/* install exception handlers */
|
|
for (exc = (uint8_t *)0x100; exc <= (uint8_t *)0x1400; exc += 0x100)
|
|
memcpy(exc, trap, trap_end - trap);
|
|
|
|
/* handle NULL-ptr calls from 0x0 to 0xfc */
|
|
for (ip = 0; ip < (uint32_t *)0x100; ip++)
|
|
*ip = 0x48000002 | (uint32_t)trap;
|
|
|
|
__syncicache(0, 0x1400);
|
|
}
|
|
|
|
void
|
|
exception_handler(unsigned vector, struct cpu_state *st)
|
|
{
|
|
static bool in_exception = false;
|
|
uint32_t *fp;
|
|
int i;
|
|
|
|
if (vector > 0x1400)
|
|
printf("\nCALL TO NULL POINTER FROM %08x\n", st->lr - 4);
|
|
else
|
|
printf("\nEXCEPTION VECTOR %04x\n", vector);
|
|
if (in_exception) {
|
|
printf("caused in exception handler! Restarting...\n");
|
|
_rtt();
|
|
}
|
|
in_exception = true;
|
|
|
|
/* register dump */
|
|
printf("\n SRR0=%08x SRR1=%08x DAR=%08x DSISR=%08x\n"
|
|
" CR=%08x XER=%08x LR=%08x CTR=%08x\n"
|
|
"DMISS=%08x DCMP=%08x HASH1=%08x HASH2=%08x\n"
|
|
"IMISS=%08x ICMP=%08x RPA=%08x\n\n",
|
|
st->srr0, st->srr1, st->dar, st->dsisr,
|
|
st->cr, st->xer, st->lr, st->ctr,
|
|
st->dmiss,st->dcmp,st->hash1,st->hash2,
|
|
st->imiss,st->icmp,st->rpa);
|
|
for (i = 0; i < 32; i++) {
|
|
if ((i & 7) == 0)
|
|
printf("GPR%02d:", i);
|
|
printf("%c%08x", (i & 7) == 4 ? ':' : ' ', st->gpr[i]);
|
|
if ((i & 7) == 7)
|
|
printf("\n");
|
|
}
|
|
|
|
/* V.4-ABI stack frame back trace */
|
|
printf("\nBacktrace:\n");
|
|
i = 0;
|
|
fp = (uint32_t *)st->gpr[1];
|
|
while ((fp = *(uint32_t **)fp) != NULL && i++ < 10)
|
|
printf("%p: called from %08x\n", fp, *(fp + 1) - 4);
|
|
|
|
printf("\nHit any key to reboot.\n");
|
|
(void)getchar();
|
|
_rtt();
|
|
}
|
|
|
|
#endif /* DEBUG */
|