95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/* $NetBSD: db_trap.c,v 1.17 2000/12/20 15:42:37 jhawk Exp $ */
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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/*
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* Trap entry point to kernel debugger.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_run.h>
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#include <ddb/db_command.h>
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#include <ddb/db_break.h>
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#include <ddb/db_output.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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/*
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* db_trap_callback can be hooked by MD port code to handle special
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* cases such as disabling hardware watchdogs while in DDB.
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*/
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void (*db_trap_callback)(int);
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void
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db_trap(type, code)
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int type, code;
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{
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boolean_t bkpt;
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boolean_t watchpt;
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bkpt = IS_BREAKPOINT_TRAP(type, code);
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watchpt = IS_WATCHPOINT_TRAP(type, code);
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if (db_trap_callback) db_trap_callback(1);
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if (db_stop_at_pc(DDB_REGS, &bkpt)) {
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if (db_inst_count) {
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db_printf("After %d instructions (%d loads, %d stores),\n",
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db_inst_count, db_load_count, db_store_count);
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}
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if (curproc != NULL) {
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if (bkpt)
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db_printf("Breakpoint");
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else if (watchpt)
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db_printf("Watchpoint");
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else
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db_printf("Stopped");
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db_printf(" in pid %d (%s) at\t", curproc->p_pid,
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curproc->p_comm);
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} else if (bkpt)
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db_printf("Breakpoint at\t");
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else if (watchpt)
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db_printf("Watchpoint at\t");
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else
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db_printf("Stopped at\t");
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db_dot = PC_REGS(DDB_REGS);
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db_print_loc_and_inst(db_dot);
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db_command_loop();
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}
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db_restart_at_pc(DDB_REGS, watchpt);
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if (db_trap_callback) db_trap_callback(0);
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}
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