[apple/xnu.git] / osfmk / ddb / db_trap.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_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;

#if	PARAGON860 && NCPUS > 1
extern int	db_first_cpu;
#endif

void
db_task_trap(
	int		type,
	int		code,
	boolean_t	user_space)
{
	jmp_buf_t db_jmpbuf;
	jmp_buf_t *prev;
	boolean_t	bkpt;
	boolean_t	watchpt;
	task_t		task;
	task_t		task_space;

	task = db_current_task();
	task_space = db_target_space(current_act(), 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.
	 */
	db_init_default_act();
	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 %#X.\n", db_dot);
	    db_recover = prev;

	    db_command_loop();
	}

	db_restart_at_pc(watchpt, task_space);
}
Commit	Line	Data
1c79356b A	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 Software.Distribution@CS.CMU.EDU
	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	}