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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Intel-specific portions of the debugger fault routines
*/
#include <sys/types.h>
#include <sys/stack.h>
#include <sys/frame.h>
#include <kmdb/kmdb_fault.h>
#include <kmdb/kmdb_asmutil.h>
#include <mdb/mdb_kreg.h>
#include <mdb/mdb.h>
#define MAX_STACK_FRAMES 30
static void
print_frame(uintptr_t pc, int fnum, int safe)
{
if (safe) {
/*
* We exploded the first time around, so we want to try again,
* this time without symbol names
*/
mdb_iob_printf(mdb.m_err, " [%2d] %?p()\n", fnum, pc);
} else {
mdb_iob_printf(mdb.m_err, " [%2d] %?p %A()\n", fnum, pc, pc);
}
}
static int
valid_frame(struct frame *fr)
{
uintptr_t addr = (uintptr_t)fr;
if (addr & (STACK_ALIGN - 1)) {
mdb_iob_printf(mdb.m_err, " mis-aligned frame (%p)\n", fr);
return (0);
}
return (1);
}
static void
print_stack(kreg_t sp, int safe)
{
struct frame *fr = (struct frame *)sp;
int frnum = 1;
while (fr != NULL && valid_frame(fr) && fr->fr_savpc != 0 &&
frnum < MAX_STACK_FRAMES) {
print_frame(fr->fr_savpc, frnum, safe);
fr = (struct frame *)fr->fr_savfp;
frnum++;
}
}
void
kmdb_print_stack(void)
{
print_stack(get_fp(), FALSE); /* show sym names */
}
void
kmdb_fault_display(kreg_t trapno, kreg_t pc, kreg_t sp, int safe)
{
mdb_iob_printf(mdb.m_err, " trapno: %d, sp: %p, pc: %p", trapno,
sp, pc);
if (!safe)
mdb_iob_printf(mdb.m_err, " %A", pc);
mdb_iob_printf(mdb.m_err, "\n\n");
if (mdb.m_dseg == NULL || mdb.m_dsegsz == 0) {
mdb_iob_printf(mdb.m_err,
"\t*** Stack trace omitted because debugger segment size\n"
"\t*** and/or length not set.\n");
return;
}
if (!(sp - (uintptr_t)mdb.m_dseg < mdb.m_dsegsz)) {
mdb_iob_printf(mdb.m_err,
"\t*** Stack trace omitted because sp (%p) isn't in the\n"
"\t*** debugger segment.\n", sp);
return;
}
/*
* We were on a kmdb stack when we took this fault. We're going to
* assume that there's nothing weird on the stack, and that, therefore,
* we can use a simple algorithm to dump it.
*/
print_stack(sp, safe);
}
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