/* * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * Author: David B. Golub, Carnegie Mellon University * Date: 7/90 */ /* * Trap entry point to kernel debugger. */ #include <mach/boolean.h> #include <machine/db_machdep.h> #include <kern/misc_protos.h> #include <ddb/db_access.h> #include <ddb/db_break.h> #include <ddb/db_command.h> #include <ddb/db_examine.h> #include <ddb/db_output.h> /* For db_printf() */ #include <ddb/db_run.h> #include <ddb/db_task_thread.h> #include <ddb/db_trap.h> #include <machine/setjmp.h> extern jmp_buf_t *db_recover; extern int db_inst_count; extern int db_load_count; extern int db_store_count; static task_t task_space; static task_t task; void db_task_trap(__unused int type, __unused int code, boolean_t user_space) { jmp_buf_t db_jmpbuf; jmp_buf_t *prev; boolean_t bkpt; boolean_t watchpt; task = db_current_task(); task_space = db_target_space(current_thread(), user_space); bkpt = IS_BREAKPOINT_TRAP(type, code); watchpt = IS_WATCHPOINT_TRAP(type, code); /* * Note: we look up PC values in an address space (task_space), * but print symbols using a (task-specific) symbol table, found * using task. */ /* Elided since walking the thread/task lists before setting up * safe recovery points is incorrect, and could * potentially cause us to loop and fault indefinitely. */ #if 0 db_init_default_act(); #endif db_check_breakpoint_valid(); if (db_stop_at_pc(&bkpt, task, task_space)) { if (db_inst_count) { db_printf("After %d instructions (%d loads, %d stores),\n", db_inst_count, db_load_count, db_store_count); } if (bkpt) db_printf("Breakpoint at "); else if (watchpt) db_printf("Watchpoint at "); else db_printf("Stopped at "); db_dot = PC_REGS(DDB_REGS); prev = db_recover; if (_setjmp(db_recover = &db_jmpbuf) == 0) { #if defined(__alpha) db_print_loc(db_dot, task_space); db_printf("\n\t"); db_print_inst(db_dot, task_space); #else /* !defined(__alpha) */ #if defined(__ppc__) db_print_loc_and_inst(db_dot, task_space); #else /* __ppc__ */ db_print_loc_and_inst(db_dot, task); #endif /* __ppc__ */ #endif /* defined(__alpha) */ } else db_printf("Trouble printing location %#llX.\n", (unsigned long long)db_dot); db_recover = prev; db_command_loop(); } db_restart_at_pc(watchpt, task_space); }