| 0,0 → 1,175 |
|---|
| /* |
| * 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); |
| |
| #ifdef __32_BITS__ |
| printf("Exc Description Handler Symbol\n"); |
| printf("--- -------------------- ---------- --------\n"); |
| #endif |
| |
| #ifdef __64_BITS__ |
| printf("Exc Description Handler Symbol\n"); |
| printf("--- -------------------- ------------------ --------\n"); |
| #endif |
| |
| for (i = 0; i < IVT_ITEMS; i++) { |
| symbol = get_symtab_entry((unative_t) exc_table[i].f); |
| if (!symbol) |
| symbol = "not found"; |
| |
| #ifdef __32_BITS__ |
| printf("%-3u %-20s %10p %s\n", i + IVT_FIRST, exc_table[i].name, |
| exc_table[i].f, symbol); |
| #endif |
| |
| #ifdef __64_BITS__ |
| printf("%-3u %-20s %18p %s\n", i + IVT_FIRST, exc_table[i].name, |
| exc_table[i].f, symbol); |
| #endif |
| |
| 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); |
| } |
| |
| /** @} |
| */ |