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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: }
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