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Annotation of Net2/ddb/db_trap.c, revision 1.1

1.1     ! root        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  [email protected]
        !            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: /*
        !            27:  * HISTORY
        !            28:  * $Log: db_trap.c,v $
        !            29:  * Revision 1.1  1992/03/25  21:45:31  pace
        !            30:  * Initial revision
        !            31:  *
        !            32:  * Revision 2.5  91/02/05  17:07:16  mrt
        !            33:  *     Changed to new Mach copyright
        !            34:  *     [91/01/31  16:19:35  mrt]
        !            35:  * 
        !            36:  * Revision 2.4  91/01/08  15:09:17  rpd
        !            37:  *     Changed db_stop_at_pc's arguments.
        !            38:  *     Print db_inst_count, db_load_count, db_store_count.
        !            39:  *     [90/11/27            rpd]
        !            40:  * 
        !            41:  * Revision 2.3  90/10/25  14:44:11  rwd
        !            42:  *     From rpd.
        !            43:  *     [90/10/19  17:03:17  rwd]
        !            44:  * 
        !            45:  *     Generalized the watchpoint support.
        !            46:  *     [90/10/16            rwd]
        !            47:  *     Added watchpoint support.
        !            48:  *     [90/10/16            rpd]
        !            49:  * 
        !            50:  * Revision 2.2  90/08/27  21:52:52  dbg
        !            51:  *     Assign to db_dot before calling the print function.
        !            52:  *     [90/08/20            af]
        !            53:  *     Reduce lint.
        !            54:  *     [90/08/07            dbg]
        !            55:  *     Created.
        !            56:  *     [90/07/25            dbg]
        !            57:  * 
        !            58:  */
        !            59: /*
        !            60:  *     Author: David B. Golub, Carnegie Mellon University
        !            61:  *     Date:   7/90
        !            62:  */
        !            63: 
        !            64: /*
        !            65:  * Trap entry point to kernel debugger.
        !            66:  */
        !            67: #include "param.h"
        !            68: #include "proc.h"
        !            69: #include <ddb/db_command.h>
        !            70: #include <ddb/db_break.h>
        !            71: 
        !            72: extern void            db_restart_at_pc();
        !            73: extern boolean_t       db_stop_at_pc();
        !            74: 
        !            75: extern int             db_inst_count;
        !            76: extern int             db_load_count;
        !            77: extern int             db_store_count;
        !            78: 
        !            79: db_trap(type, code)
        !            80:        int     type, code;
        !            81: {
        !            82:        boolean_t       bkpt;
        !            83:        boolean_t       watchpt;
        !            84: 
        !            85:        bkpt = IS_BREAKPOINT_TRAP(type, code);
        !            86:        watchpt = IS_WATCHPOINT_TRAP(type, code);
        !            87: 
        !            88:        if (db_stop_at_pc(&bkpt)) {
        !            89:            if (db_inst_count) {
        !            90:                db_printf("After %d instructions (%d loads, %d stores),\n",
        !            91:                          db_inst_count, db_load_count, db_store_count);
        !            92:            }
        !            93:            if (bkpt)
        !            94:                db_printf("Breakpoint at\t");
        !            95:            else if (watchpt)
        !            96:                db_printf("Watchpoint at\t");
        !            97:            else
        !            98:                db_printf("Stopped at\t");
        !            99:            db_dot = PC_REGS(DDB_REGS);
        !           100:            db_print_loc_and_inst(db_dot);
        !           101: 
        !           102:            db_command_loop();
        !           103:        }
        !           104: 
        !           105:        db_restart_at_pc(watchpt);
        !           106: }

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