109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/* $NetBSD: db_trap.c,v 1.23 2005/12/11 12:20:53 christos Exp $ */
|
|
|
|
/*
|
|
* Mach Operating System
|
|
* Copyright (c) 1991,1990 Carnegie Mellon University
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and its
|
|
* documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*
|
|
* Author: David B. Golub, Carnegie Mellon University
|
|
* Date: 7/90
|
|
*/
|
|
|
|
/*
|
|
* Trap entry point to kernel debugger.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: db_trap.c,v 1.23 2005/12/11 12:20:53 christos Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <machine/db_machdep.h>
|
|
|
|
#include <ddb/db_run.h>
|
|
#include <ddb/db_command.h>
|
|
#include <ddb/db_break.h>
|
|
#include <ddb/db_output.h>
|
|
#include <ddb/db_sym.h>
|
|
#include <ddb/db_extern.h>
|
|
|
|
/*
|
|
* db_trap_callback can be hooked by MD port code to handle special
|
|
* cases such as disabling hardware watchdogs while in DDB.
|
|
*/
|
|
void (*db_trap_callback)(int);
|
|
|
|
int db_trap_type;
|
|
|
|
void
|
|
db_trap(int type, int code)
|
|
{
|
|
boolean_t bkpt;
|
|
boolean_t watchpt;
|
|
|
|
db_trap_type = type;
|
|
|
|
bkpt = IS_BREAKPOINT_TRAP(type, code);
|
|
watchpt = IS_WATCHPOINT_TRAP(type, code);
|
|
|
|
if (db_trap_callback) db_trap_callback(1);
|
|
|
|
if (db_stop_at_pc(DDB_REGS, &bkpt)) {
|
|
if (db_inst_count) {
|
|
db_printf("After %d instructions "
|
|
"(%d loads, %d stores),\n",
|
|
db_inst_count, db_load_count, db_store_count);
|
|
}
|
|
if (curlwp != NULL) {
|
|
if (bkpt)
|
|
db_printf("Breakpoint");
|
|
else if (watchpt)
|
|
db_printf("Watchpoint");
|
|
else
|
|
db_printf("Stopped");
|
|
if (curproc == NULL)
|
|
db_printf("; curlwp = %p,"
|
|
" curproc is NULL at\t", curlwp);
|
|
else
|
|
db_printf(" in pid %d.%d (%s) at\t",
|
|
curproc->p_pid, curlwp->l_lid,
|
|
curproc->p_comm);
|
|
} else if (bkpt)
|
|
db_printf("Breakpoint at\t");
|
|
else if (watchpt)
|
|
db_printf("Watchpoint at\t");
|
|
else
|
|
db_printf("Stopped at\t");
|
|
db_dot = PC_REGS(DDB_REGS);
|
|
db_print_loc_and_inst(db_dot);
|
|
|
|
db_command_loop();
|
|
}
|
|
|
|
db_restart_at_pc(DDB_REGS, watchpt);
|
|
|
|
if (db_trap_callback)
|
|
db_trap_callback(0);
|
|
}
|