Return to db_trap.c CVS log

Up to [Apple XNU] / XNU / osfmk / ddb

Annotation of XNU/osfmk/ddb/db_trap.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1991,1990 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: /*
        !            51:  */
        !            52: /*
        !            53:  *     Author: David B. Golub, Carnegie Mellon University
        !            54:  *     Date:   7/90
        !            55:  */
        !            56: 
        !            57: /*
        !            58:  * Trap entry point to kernel debugger.
        !            59:  */
        !            60: #include <mach/boolean.h>
        !            61: #include <machine/db_machdep.h>
        !            62: #include <kern/misc_protos.h>
        !            63: #include <ddb/db_access.h>
        !            64: #include <ddb/db_break.h>
        !            65: #include <ddb/db_command.h>
        !            66: #include <ddb/db_examine.h>
        !            67: #include <ddb/db_output.h>             /* For db_printf() */
        !            68: #include <ddb/db_run.h>
        !            69: #include <ddb/db_task_thread.h>
        !            70: #include <ddb/db_trap.h>
        !            71: #include <machine/setjmp.h>
        !            72: 
        !            73: extern jmp_buf_t *db_recover;
        !            74: 
        !            75: extern int             db_inst_count;
        !            76: extern int             db_load_count;
        !            77: extern int             db_store_count;
        !            78: 
        !            79: #if    PARAGON860 && NCPUS > 1
        !            80: extern int     db_first_cpu;
        !            81: #endif
        !            82: 
        !            83: void
        !            84: db_task_trap(
        !            85:        int             type,
        !            86:        int             code,
        !            87:        boolean_t       user_space)
        !            88: {
        !            89:        jmp_buf_t db_jmpbuf;
        !            90:        jmp_buf_t *prev;
        !            91:        boolean_t       bkpt;
        !            92:        boolean_t       watchpt;
        !            93:        task_t          task;
        !            94:        task_t          task_space;
        !            95: 
        !            96:        task = db_current_task();
        !            97:        task_space = db_target_space(current_act(), user_space);
        !            98:        bkpt = IS_BREAKPOINT_TRAP(type, code);
        !            99:        watchpt = IS_WATCHPOINT_TRAP(type, code);
        !           100: 
        !           101:        /*
        !           102:         * Note:  we look up PC values in an address space (task_space),
        !           103:         * but print symbols using a (task-specific) symbol table, found
        !           104:         * using task.
        !           105:         */
        !           106:        db_init_default_act();
        !           107:        db_check_breakpoint_valid();
        !           108:        if (db_stop_at_pc(&bkpt, task, task_space)) {
        !           109:            if (db_inst_count) {
        !           110:                db_printf("After %d instructions (%d loads, %d stores),\n",
        !           111:                          db_inst_count, db_load_count, db_store_count);
        !           112:            }
        !           113:            if (bkpt)
        !           114:                db_printf("Breakpoint at  ");
        !           115:            else if (watchpt)
        !           116:                db_printf("Watchpoint at  ");
        !           117:            else
        !           118:                db_printf("Stopped at  ");
        !           119:            db_dot = PC_REGS(DDB_REGS);
        !           120: 
        !           121:            prev = db_recover;
        !           122:            if (_setjmp(db_recover = &db_jmpbuf) == 0) {
        !           123: #if defined(__alpha)
        !           124:                db_print_loc(db_dot, task_space);
        !           125:                db_printf("\n\t");
        !           126:                db_print_inst(db_dot, task_space);
        !           127: #else /* !defined(__alpha) */
        !           128: #if defined(__ppc__)
        !           129:                db_print_loc_and_inst(db_dot, task_space);
        !           130: #else  /* __ppc__ */
        !           131:                db_print_loc_and_inst(db_dot, task);
        !           132: #endif /* __ppc__ */
        !           133: #endif /* defined(__alpha) */
        !           134:            } else
        !           135:                db_printf("Trouble printing location %#X.\n", db_dot);
        !           136:            db_recover = prev;
        !           137: 
        !           138:            db_command_loop();
        !           139:        }
        !           140: 
        !           141:        db_restart_at_pc(watchpt, task_space);
        !           142: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.