projects / apple / xnu.git / blame
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|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
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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. | |
| 1c79356b | 11 | * |
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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 | |
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14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
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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. | |
| 1c79356b A |
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 | } |