db_trap.c revision 1.15
1/* $NetBSD: db_trap.c,v 1.15 2000/07/17 19:57:50 jeffs Exp $ */ 2 3/* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 * 28 * Author: David B. Golub, Carnegie Mellon University 29 * Date: 7/90 30 */ 31 32/* 33 * Trap entry point to kernel debugger. 34 */ 35#include <sys/param.h> 36#include <sys/proc.h> 37 38#include <machine/db_machdep.h> 39 40#include <ddb/db_run.h> 41#include <ddb/db_command.h> 42#include <ddb/db_break.h> 43#include <ddb/db_output.h> 44#include <ddb/db_sym.h> 45#include <ddb/db_extern.h> 46 47void (*db_trap_callback)(int); 48 49void 50db_trap(type, code) 51 int type, code; 52{ 53 boolean_t bkpt; 54 boolean_t watchpt; 55 56 bkpt = IS_BREAKPOINT_TRAP(type, code); 57 watchpt = IS_WATCHPOINT_TRAP(type, code); 58 59 if (db_trap_callback) db_trap_callback(1); 60 61 if (db_stop_at_pc(DDB_REGS, &bkpt)) { 62 if (db_inst_count) { 63 db_printf("After %d instructions (%d loads, %d stores),\n", 64 db_inst_count, db_load_count, db_store_count); 65 } 66 if (curproc != NULL) { 67 if (bkpt) 68 db_printf("Breakpoint in %s at\t", curproc->p_comm); 69 else if (watchpt) 70 db_printf("Watchpoint in %s at\t", curproc->p_comm); 71 else 72 db_printf("Stopped in %s at\t", curproc->p_comm); 73 } else if (bkpt) 74 db_printf("Breakpoint at\t"); 75 else if (watchpt) 76 db_printf("Watchpoint at\t"); 77 else 78 db_printf("Stopped at\t"); 79 db_dot = PC_REGS(DDB_REGS); 80 db_print_loc_and_inst(db_dot); 81 82 db_command_loop(); 83 } 84 85 db_restart_at_pc(DDB_REGS, watchpt); 86 87 if (db_trap_callback) db_trap_callback(0); 88} 89