0,0 → 1,170 |
/* |
* Copyright (c) 2005 Ondrej Palkovsky |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup genericinterrupt |
* @{ |
*/ |
/** |
* @file |
* @brief Interrupt redirector. |
* |
* This file provides means of registering interrupt handlers |
* by kernel functions and calling the handlers when interrupts |
* occur. |
*/ |
|
#include <interrupt.h> |
#include <debug.h> |
#include <console/kconsole.h> |
#include <console/console.h> |
#include <console/chardev.h> |
#include <console/cmd.h> |
#include <panic.h> |
#include <print.h> |
#include <symtab.h> |
|
static struct { |
const char *name; |
iroutine f; |
} exc_table[IVT_ITEMS]; |
|
SPINLOCK_INITIALIZE(exctbl_lock); |
|
/** Register exception handler |
* |
* @param n Exception number |
* @param name Description |
* @param f Exception handler |
*/ |
iroutine exc_register(int n, const char *name, iroutine f) |
{ |
ASSERT(n < IVT_ITEMS); |
|
iroutine old; |
|
spinlock_lock(&exctbl_lock); |
|
old = exc_table[n].f; |
exc_table[n].f = f; |
exc_table[n].name = name; |
|
spinlock_unlock(&exctbl_lock); |
|
return old; |
} |
|
/** Dispatch exception according to exception table |
* |
* Called directly from the assembler code. |
* CPU is interrupts_disable()'d. |
*/ |
void exc_dispatch(int n, istate_t *istate) |
{ |
ASSERT(n < IVT_ITEMS); |
|
exc_table[n].f(n + IVT_FIRST, istate); |
/* This is a safe place to exit exiting thread */ |
if (THREAD && THREAD->interrupted && istate_from_uspace(istate)) |
thread_exit(); |
} |
|
/** Default 'null' exception handler */ |
static void exc_undef(int n, istate_t *istate) |
{ |
fault_if_from_uspace(istate, "Unhandled exception %d.", n); |
panic("Unhandled exception %d.", n); |
} |
|
/** kconsole cmd - print all exceptions */ |
static int exc_print_cmd(cmd_arg_t *argv) |
{ |
#if (IVT_ITEMS > 0) |
unsigned int i; |
char *symbol; |
|
spinlock_lock(&exctbl_lock); |
|
if (sizeof(void *) == 4) { |
printf("Exc Description Handler Symbol\n"); |
printf("--- -------------------- ---------- --------\n"); |
} else { |
printf("Exc Description Handler Symbol\n"); |
printf("--- -------------------- ------------------ --------\n"); |
} |
|
for (i = 0; i < IVT_ITEMS; i++) { |
symbol = get_symtab_entry((unative_t) exc_table[i].f); |
if (!symbol) |
symbol = "not found"; |
|
if (sizeof(void *) == 4) |
printf("%-3u %-20s %#10zx %s\n", i + IVT_FIRST, exc_table[i].name, |
exc_table[i].f, symbol); |
else |
printf("%-3u %-20s %#18zx %s\n", i + IVT_FIRST, exc_table[i].name, |
exc_table[i].f, symbol); |
|
if (((i + 1) % 20) == 0) { |
printf(" -- Press any key to continue -- "); |
spinlock_unlock(&exctbl_lock); |
getc(stdin); |
spinlock_lock(&exctbl_lock); |
printf("\n"); |
} |
} |
|
spinlock_unlock(&exctbl_lock); |
#endif |
|
return 1; |
} |
|
static cmd_info_t exc_info = { |
.name = "exc", |
.description = "Print exception table.", |
.func = exc_print_cmd, |
.help = NULL, |
.argc = 0, |
.argv = NULL |
}; |
|
/** Initialize generic exception handling support */ |
void exc_init(void) |
{ |
int i; |
|
for (i=0;i < IVT_ITEMS; i++) |
exc_register(i, "undef", (iroutine) exc_undef); |
|
cmd_initialize(&exc_info); |
if (!cmd_register(&exc_info)) |
panic("could not register command %s\n", exc_info.name); |
} |
|
/** @} |
*/ |