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| Rev | Author | Line No. | Line |
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| 575 | palkovsky | 1 | /* |
| 2 | * Copyright (C) 2005 Ondrej Palkovsky |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <interrupt.h> |
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| 30 | #include <debug.h> |
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| 578 | palkovsky | 31 | #include <console/kconsole.h> |
| 32 | #include <console/console.h> |
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| 33 | #include <console/chardev.h> |
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| 34 | #include <panic.h> |
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| 35 | #include <print.h> |
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| 36 | #include <symtab.h> |
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| 575 | palkovsky | 37 | |
| 38 | static struct { |
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| 578 | palkovsky | 39 | const char *name; |
| 575 | palkovsky | 40 | iroutine f; |
| 578 | palkovsky | 41 | } exc_table[IVT_ITEMS]; |
| 575 | palkovsky | 42 | |
| 578 | palkovsky | 43 | static spinlock_t exctbl_lock; |
| 44 | |||
| 45 | /** Register exception handler |
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| 46 | * |
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| 47 | * @param n Exception number |
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| 48 | * @param name Description |
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| 49 | * @param f Exception handler |
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| 50 | */ |
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| 51 | iroutine exc_register(int n, const char *name, iroutine f) |
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| 575 | palkovsky | 52 | { |
| 53 | ASSERT(n < IVT_ITEMS); |
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| 54 | |||
| 55 | iroutine old; |
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| 56 | |||
| 578 | palkovsky | 57 | spinlock_lock(&exctbl_lock); |
| 58 | |||
| 59 | old = exc_table[n].f; |
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| 60 | exc_table[n].f = f; |
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| 61 | exc_table[n].name = name; |
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| 62 | |||
| 63 | spinlock_unlock(&exctbl_lock); |
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| 64 | |||
| 575 | palkovsky | 65 | return old; |
| 66 | } |
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| 67 | |||
| 578 | palkovsky | 68 | /** Dispatch exception according to exception table |
| 69 | * |
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| 575 | palkovsky | 70 | * Called directly from the assembler code. |
| 71 | * CPU is interrupts_disable()'d. |
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| 72 | */ |
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| 73 | void exc_dispatch(int n, void *stack) |
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| 74 | { |
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| 75 | ASSERT(n < IVT_ITEMS); |
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| 76 | |||
| 578 | palkovsky | 77 | exc_table[n].f(n, stack); |
| 575 | palkovsky | 78 | } |
| 578 | palkovsky | 79 | |
| 80 | /** Default 'null' exception handler */ |
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| 81 | static void exc_undef(int n, void *stack) |
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| 82 | { |
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| 83 | panic("Unhandled exception %d.", n); |
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| 84 | } |
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| 85 | |||
| 86 | /** KConsole cmd - print all exceptions */ |
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| 87 | static int exc_print_cmd(cmd_arg_t *argv) |
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| 88 | { |
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| 89 | int i; |
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| 90 | char *symbol; |
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| 91 | |||
| 92 | spinlock_lock(&exctbl_lock); |
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| 582 | palkovsky | 93 | printf("Exc Description Handler\n"); |
| 578 | palkovsky | 94 | for (i=0; i < IVT_ITEMS; i++) { |
| 95 | symbol = get_symtab_entry((__native)exc_table[i].f); |
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| 96 | if (!symbol) |
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| 97 | symbol = "not found"; |
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| 98 | printf("%d %s 0x%p(%s)\n",i,exc_table[i].name, |
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| 99 | exc_table[i].f,symbol); |
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| 100 | if (!((i+1) % 20)) { |
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| 101 | printf("Press any key to continue."); |
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| 579 | palkovsky | 102 | spinlock_unlock(&exctbl_lock); |
| 578 | palkovsky | 103 | getc(stdin); |
| 579 | palkovsky | 104 | spinlock_lock(&exctbl_lock); |
| 578 | palkovsky | 105 | printf("\n"); |
| 106 | } |
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| 107 | } |
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| 108 | spinlock_unlock(&exctbl_lock); |
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| 109 | |||
| 110 | return 1; |
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| 111 | } |
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| 112 | |||
| 113 | static cmd_info_t exc_info = { |
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| 581 | palkovsky | 114 | .name = "pexc", |
| 578 | palkovsky | 115 | .description = "Print exception table", |
| 116 | .func = exc_print_cmd, |
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| 117 | .help = NULL, |
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| 118 | .argc = 0, |
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| 119 | .argv = NULL |
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| 120 | }; |
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| 121 | |||
| 122 | /** Initialize generic exception handling support */ |
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| 123 | void exc_init(void) |
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| 124 | { |
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| 125 | int i; |
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| 126 | |||
| 127 | spinlock_initialize(&exctbl_lock, "exctbl_lock"); |
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| 128 | |||
| 129 | for (i=0;i < IVT_ITEMS; i++) |
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| 130 | exc_register(i, "undef", exc_undef); |
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| 131 | |||
| 132 | spinlock_initialize(&exc_info.lock, "kconsole_excinfo"); |
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| 133 | link_initialize(&exc_info.link); |
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| 134 | if (!cmd_register(&exc_info)) |
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| 135 | panic("could not register command %s\n", exc_info.name); |
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| 136 | } |
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| 137 |