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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 | |||
1264 | jermar | 29 | /** |
30 | * @file interrupt.c |
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31 | * @brief Interrupt redirector. |
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32 | * |
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33 | * This file provides means of registering interrupt handlers |
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34 | * by kernel functions and calling the handlers when interrupts |
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35 | * occur. |
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36 | */ |
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37 | |||
575 | palkovsky | 38 | #include <interrupt.h> |
39 | #include <debug.h> |
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578 | palkovsky | 40 | #include <console/kconsole.h> |
41 | #include <console/console.h> |
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42 | #include <console/chardev.h> |
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673 | jermar | 43 | #include <console/cmd.h> |
578 | palkovsky | 44 | #include <panic.h> |
45 | #include <print.h> |
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46 | #include <symtab.h> |
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575 | palkovsky | 47 | |
48 | static struct { |
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578 | palkovsky | 49 | const char *name; |
575 | palkovsky | 50 | iroutine f; |
578 | palkovsky | 51 | } exc_table[IVT_ITEMS]; |
575 | palkovsky | 52 | |
623 | jermar | 53 | SPINLOCK_INITIALIZE(exctbl_lock); |
578 | palkovsky | 54 | |
55 | /** Register exception handler |
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56 | * |
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57 | * @param n Exception number |
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58 | * @param name Description |
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59 | * @param f Exception handler |
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60 | */ |
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61 | iroutine exc_register(int n, const char *name, iroutine f) |
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575 | palkovsky | 62 | { |
63 | ASSERT(n < IVT_ITEMS); |
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64 | |||
65 | iroutine old; |
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66 | |||
578 | palkovsky | 67 | spinlock_lock(&exctbl_lock); |
68 | |||
69 | old = exc_table[n].f; |
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70 | exc_table[n].f = f; |
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71 | exc_table[n].name = name; |
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72 | |||
73 | spinlock_unlock(&exctbl_lock); |
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74 | |||
575 | palkovsky | 75 | return old; |
76 | } |
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77 | |||
578 | palkovsky | 78 | /** Dispatch exception according to exception table |
79 | * |
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575 | palkovsky | 80 | * Called directly from the assembler code. |
81 | * CPU is interrupts_disable()'d. |
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82 | */ |
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958 | jermar | 83 | void exc_dispatch(int n, istate_t *istate) |
575 | palkovsky | 84 | { |
85 | ASSERT(n < IVT_ITEMS); |
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86 | |||
958 | jermar | 87 | exc_table[n].f(n + IVT_FIRST, istate); |
1597 | palkovsky | 88 | /* This is a safe place to exit exiting thread */ |
89 | if (THREAD && THREAD->interrupted && istate_from_uspace(istate)) |
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90 | thread_exit(); |
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575 | palkovsky | 91 | } |
578 | palkovsky | 92 | |
93 | /** Default 'null' exception handler */ |
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958 | jermar | 94 | static void exc_undef(int n, istate_t *istate) |
578 | palkovsky | 95 | { |
1595 | palkovsky | 96 | fault_if_from_uspace(istate, "Unhandled exception %d.", n); |
578 | palkovsky | 97 | panic("Unhandled exception %d.", n); |
98 | } |
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99 | |||
664 | jermar | 100 | /** kconsole cmd - print all exceptions */ |
578 | palkovsky | 101 | static int exc_print_cmd(cmd_arg_t *argv) |
102 | { |
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103 | int i; |
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104 | char *symbol; |
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105 | |||
106 | spinlock_lock(&exctbl_lock); |
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582 | palkovsky | 107 | printf("Exc Description Handler\n"); |
578 | palkovsky | 108 | for (i=0; i < IVT_ITEMS; i++) { |
109 | symbol = get_symtab_entry((__native)exc_table[i].f); |
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110 | if (!symbol) |
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111 | symbol = "not found"; |
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1224 | cejka | 112 | printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name, |
113 | sizeof(__address) * 2, exc_table[i].f,symbol); |
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578 | palkovsky | 114 | if (!((i+1) % 20)) { |
115 | printf("Press any key to continue."); |
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579 | palkovsky | 116 | spinlock_unlock(&exctbl_lock); |
578 | palkovsky | 117 | getc(stdin); |
579 | palkovsky | 118 | spinlock_lock(&exctbl_lock); |
578 | palkovsky | 119 | printf("\n"); |
120 | } |
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121 | } |
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122 | spinlock_unlock(&exctbl_lock); |
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123 | |||
124 | return 1; |
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125 | } |
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126 | |||
127 | static cmd_info_t exc_info = { |
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673 | jermar | 128 | .name = "exc", |
586 | jermar | 129 | .description = "Print exception table.", |
578 | palkovsky | 130 | .func = exc_print_cmd, |
131 | .help = NULL, |
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132 | .argc = 0, |
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133 | .argv = NULL |
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134 | }; |
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135 | |||
136 | /** Initialize generic exception handling support */ |
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137 | void exc_init(void) |
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138 | { |
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139 | int i; |
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140 | |||
141 | for (i=0;i < IVT_ITEMS; i++) |
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958 | jermar | 142 | exc_register(i, "undef", (iroutine) exc_undef); |
578 | palkovsky | 143 | |
673 | jermar | 144 | cmd_initialize(&exc_info); |
578 | palkovsky | 145 | if (!cmd_register(&exc_info)) |
146 | panic("could not register command %s\n", exc_info.name); |
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147 | } |
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148 |