Subversion Repositories HelenOS-historic

Rev

Rev 1597 | Rev 1705 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
575 palkovsky 1 
/*
2 
 * Copyright (C) 2005 Ondrej Palkovsky
3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
13 
 *   documentation and/or other materials provided with the distribution.
14 
 * - The name of the author may not be used to endorse or promote products
15 
 *   derived from this software without specific prior written permission.
16 
 *
17 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
1702 cejka 28 
 /** @defgroup interrupt Interrupt
29 
  * @ingroup kernel
30 
  * @{
31 
  * @}
32 
  */
575 palkovsky 33 
 
1702 cejka 34 
 /** @addtogroup genericinterrupt generic
35 
 * @ingroup interrupt
36 
 * @{
37 
 */
1264 jermar 38 
/**
1702 cejka 39 
 * @file
1264 jermar 40 
 * @brief   Interrupt redirector.
41 
 *
42 
 * This file provides means of registering interrupt handlers
43 
 * by kernel functions and calling the handlers when interrupts
44 
 * occur.
45 
 */
46 
 
575 palkovsky 47 
#include <interrupt.h>
48 
#include <debug.h>
578 palkovsky 49 
#include <console/kconsole.h>
50 
#include <console/console.h>
51 
#include <console/chardev.h>
673 jermar 52 
#include <console/cmd.h>
578 palkovsky 53 
#include <panic.h>
54 
#include <print.h>
55 
#include <symtab.h>
575 palkovsky 56 
 
57 
static struct {
578 palkovsky 58 
    const char *name;
575 palkovsky 59 
    iroutine f;
578 palkovsky 60 
} exc_table[IVT_ITEMS];
575 palkovsky 61 
 
623 jermar 62 
SPINLOCK_INITIALIZE(exctbl_lock);
578 palkovsky 63 
 
64 
/** Register exception handler
65 
 *
66 
 * @param n Exception number
67 
 * @param name Description
68 
 * @param f Exception handler
69 
 */
70 
iroutine exc_register(int n, const char *name, iroutine f)
575 palkovsky 71 
{
72 
    ASSERT(n < IVT_ITEMS);
73 
 
74 
    iroutine old;
75 
 
578 palkovsky 76 
    spinlock_lock(&exctbl_lock);
77 
 
78 
    old = exc_table[n].f;
79 
    exc_table[n].f = f;
80 
    exc_table[n].name = name;
81 
 
82 
    spinlock_unlock(&exctbl_lock); 
83 
 
575 palkovsky 84 
    return old;
85 
}
86 
 
578 palkovsky 87 
/** Dispatch exception according to exception table
88 
 *
575 palkovsky 89 
 * Called directly from the assembler code.
90 
 * CPU is interrupts_disable()'d.
91 
 */
958 jermar 92 
void exc_dispatch(int n, istate_t *istate)
575 palkovsky 93 
{
94 
    ASSERT(n < IVT_ITEMS);
95 
 
958 jermar 96 
    exc_table[n].f(n + IVT_FIRST, istate);
1597 palkovsky 97 
    /* This is a safe place to exit exiting thread */
98 
    if (THREAD && THREAD->interrupted && istate_from_uspace(istate))
99 
        thread_exit();
575 palkovsky 100 
}
578 palkovsky 101 
 
102 
/** Default 'null' exception handler */
958 jermar 103 
static void exc_undef(int n, istate_t *istate)
578 palkovsky 104 
{
1595 palkovsky 105 
    fault_if_from_uspace(istate, "Unhandled exception %d.", n);
578 palkovsky 106 
    panic("Unhandled exception %d.", n);
107 
}
108 
 
664 jermar 109 
/** kconsole cmd - print all exceptions */
578 palkovsky 110 
static int exc_print_cmd(cmd_arg_t *argv)
111 
{
112 
    int i;
113 
    char *symbol;
114 
 
115 
    spinlock_lock(&exctbl_lock);
582 palkovsky 116 
    printf("Exc Description Handler\n");
578 palkovsky 117 
    for (i=0; i < IVT_ITEMS; i++) {
118 
        symbol = get_symtab_entry((__native)exc_table[i].f);
119 
        if (!symbol)
120 
            symbol = "not found";
1224 cejka 121 
        printf("%d %s %.*p(%s)\n", i + IVT_FIRST, exc_table[i].name,
122 
               sizeof(__address) * 2, exc_table[i].f,symbol);      
578 palkovsky 123 
        if (!((i+1) % 20)) {
124 
            printf("Press any key to continue.");
579 palkovsky 125 
            spinlock_unlock(&exctbl_lock);
578 palkovsky 126 
            getc(stdin);
579 palkovsky 127 
            spinlock_lock(&exctbl_lock);
578 palkovsky 128 
            printf("\n");
129 
        }
130 
    }
131 
    spinlock_unlock(&exctbl_lock);
132 
 
133 
    return 1;
134 
}
135 
 
136 
static cmd_info_t exc_info = {
673 jermar 137 
    .name = "exc",
586 jermar 138 
    .description = "Print exception table.",
578 palkovsky 139 
    .func = exc_print_cmd,
140 
    .help = NULL,
141 
    .argc = 0,
142 
    .argv = NULL
143 
};
144 
 
145 
/** Initialize generic exception handling support */
146 
void exc_init(void)
147 
{
148 
    int i;
149 
 
150 
    for (i=0;i < IVT_ITEMS; i++)
958 jermar 151 
        exc_register(i, "undef", (iroutine) exc_undef);
578 palkovsky 152 
 
673 jermar 153 
    cmd_initialize(&exc_info);
578 palkovsky 154 
    if (!cmd_register(&exc_info))
155 
        panic("could not register command %s\n", exc_info.name);
156 
}
157 
 
1702 cejka 158 
 
159 
 /** @}
160 
 */
161