1 /* 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 * 26 * $FreeBSD: src/sys/ddb/db_trap.c,v 1.14 1999/08/28 00:41:11 peter Exp $ 27 * $DragonFly: src/sys/ddb/db_trap.c,v 1.3 2003/11/08 03:06:53 dillon Exp $ 28 */ 29 30 /* 31 * Author: David B. Golub, Carnegie Mellon University 32 * Date: 7/90 33 */ 34 35 /* 36 * Trap entry point to kernel debugger. 37 */ 38 #include <sys/param.h> 39 40 #include <ddb/ddb.h> 41 #include <ddb/db_command.h> 42 43 #include <setjmp.h> 44 45 extern jmp_buf db_jmpbuf; 46 47 void 48 db_trap(type, code) 49 int type, code; 50 { 51 boolean_t bkpt; 52 boolean_t watchpt; 53 54 bkpt = IS_BREAKPOINT_TRAP(type, code); 55 watchpt = IS_WATCHPOINT_TRAP(type, code); 56 57 if (db_stop_at_pc(&bkpt)) { 58 if (db_inst_count) { 59 db_printf("After %d instructions (%d loads, %d stores),\n", 60 db_inst_count, db_load_count, db_store_count); 61 } 62 if (bkpt) 63 db_printf("Breakpoint at\t"); 64 else if (watchpt) 65 db_printf("Watchpoint at\t"); 66 else 67 db_printf("Stopped at\t"); 68 db_dot = PC_REGS(DDB_REGS); 69 if (setjmp(db_jmpbuf) == 0) 70 db_print_loc_and_inst(db_dot, DDB_REGS); 71 72 db_command_loop(); 73 } 74 75 db_restart_at_pc(watchpt); 76 } 77