Annotation of sys/ddb/db_trap.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: db_trap.c,v 1.13 2007/06/04 17:03:04 miod Exp $ */
! 2: /* $NetBSD: db_trap.c,v 1.9 1996/02/05 01:57:18 christos Exp $ */
! 3:
! 4: /*
! 5: * Mach Operating System
! 6: * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
! 7: * All Rights Reserved.
! 8: *
! 9: * Permission to use, copy, modify and distribute this software and its
! 10: * documentation is hereby granted, provided that both the copyright
! 11: * notice and this permission notice appear in all copies of the
! 12: * software, derivative works or modified versions, and any portions
! 13: * thereof, and that both notices appear in supporting documentation.
! 14: *
! 15: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 16: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
! 17: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 18: *
! 19: * Carnegie Mellon requests users of this software to return to
! 20: *
! 21: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 22: * School of Computer Science
! 23: * Carnegie Mellon University
! 24: * Pittsburgh PA 15213-3890
! 25: *
! 26: * any improvements or extensions that they make and grant Carnegie Mellon
! 27: * the rights to redistribute these changes.
! 28: *
! 29: * Author: David B. Golub, Carnegie Mellon University
! 30: * Date: 7/90
! 31: */
! 32:
! 33: /*
! 34: * Trap entry point to kernel debugger.
! 35: */
! 36: #include <sys/param.h>
! 37: #include <sys/proc.h>
! 38: #include <sys/systm.h>
! 39:
! 40: #include <uvm/uvm_extern.h>
! 41:
! 42: #include <machine/db_machdep.h>
! 43:
! 44: #include <ddb/db_run.h>
! 45: #include <ddb/db_command.h>
! 46: #include <ddb/db_break.h>
! 47: #include <ddb/db_output.h>
! 48: #include <ddb/db_sym.h>
! 49: #include <ddb/db_extern.h>
! 50: #include <ddb/db_interface.h>
! 51:
! 52: void
! 53: db_trap(int type, int code)
! 54: {
! 55: boolean_t bkpt;
! 56: boolean_t watchpt;
! 57:
! 58: bkpt = IS_BREAKPOINT_TRAP(type, code);
! 59: watchpt = IS_WATCHPOINT_TRAP(type, code);
! 60:
! 61: if (db_stop_at_pc(DDB_REGS, &bkpt)) {
! 62: if (db_inst_count) {
! 63: db_printf("After %d instructions ", db_inst_count);
! 64: db_printf("(%d loads, %d stores),\n", db_load_count,
! 65: db_store_count);
! 66: }
! 67: if (bkpt)
! 68: db_printf("Breakpoint at\t");
! 69: else if (watchpt)
! 70: db_printf("Watchpoint at\t");
! 71: else
! 72: db_printf("Stopped at\t");
! 73: db_dot = PC_REGS(DDB_REGS);
! 74: db_print_loc_and_inst(db_dot);
! 75:
! 76: /*
! 77: * Just in case we do not have any usable console driver,
! 78: * give the user a traceback.
! 79: */
! 80: if (cold) {
! 81: db_stack_trace_print(db_dot, 0, 10 /* arbitrary */, "",
! 82: db_printf);
! 83: }
! 84:
! 85: if (panicstr != NULL) {
! 86: if (db_print_position() != 0)
! 87: db_printf("\n");
! 88: db_printf("RUN AT LEAST 'trace' AND 'ps' AND INCLUDE "
! 89: "OUTPUT WHEN REPORTING THIS PANIC!\n");
! 90: db_printf("DO NOT EVEN BOTHER REPORTING THIS WITHOUT "
! 91: "INCLUDING THAT INFORMATION!\n");
! 92: }
! 93:
! 94: db_command_loop();
! 95: }
! 96:
! 97: db_restart_at_pc(DDB_REGS, watchpt);
! 98: }
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