140 lines
3 KiB
C
140 lines
3 KiB
C
/* err.c --- handle errors for RX simulator.
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Copyright (C) 2008-2015 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of the GNU simulators.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "err.h"
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static unsigned char ee_actions[SIM_ERR_NUM_ERRORS];
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static enum execution_error last_error;
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static void
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ee_overrides ()
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{
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/* GCC may initialize a bitfield by reading the uninitialized byte,
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masking in the bitfield, and writing the byte back out. */
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ee_actions[SIM_ERR_READ_UNWRITTEN_BYTES] = SIM_ERRACTION_IGNORE;
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/* This breaks stack unwinding for exceptions because it leaves
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MC_PUSHED_PC tags in the unwound stack frames. */
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ee_actions[SIM_ERR_CORRUPT_STACK] = SIM_ERRACTION_IGNORE;
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}
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void
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execution_error_init_standalone (void)
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{
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int i;
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for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
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ee_actions[i] = SIM_ERRACTION_EXIT;
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ee_overrides ();
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}
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void
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execution_error_init_debugger (void)
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{
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int i;
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for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
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ee_actions[i] = SIM_ERRACTION_DEBUG;
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ee_overrides ();
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}
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void
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execution_error_exit_all (void)
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{
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int i;
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for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
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ee_actions[i] = SIM_ERRACTION_EXIT;
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}
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void
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execution_error_warn_all (void)
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{
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int i;
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for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
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ee_actions[i] = SIM_ERRACTION_WARN;
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}
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void
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execution_error_ignore_all (void)
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{
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int i;
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for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
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ee_actions[i] = SIM_ERRACTION_IGNORE;
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}
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void
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execution_error (enum execution_error num, unsigned long address)
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{
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if (ee_actions[num] != SIM_ERRACTION_IGNORE)
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last_error = num;
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if (ee_actions[num] == SIM_ERRACTION_EXIT
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|| ee_actions[num] == SIM_ERRACTION_WARN)
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{
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switch (num)
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{
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case SIM_ERR_READ_UNWRITTEN_PAGES:
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case SIM_ERR_READ_UNWRITTEN_BYTES:
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printf("Read from unwritten memory at 0x%lx\n", address);
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break;
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case SIM_ERR_NULL_POINTER_DEREFERENCE:
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printf ("NULL pointer dereference\n");
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break;
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case SIM_ERR_CORRUPT_STACK:
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printf ("Stack corruption detected at 0x%lx\n", address);
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break;
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default:
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printf ("Unknown execution error %d\n", num);
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exit (1);
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}
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}
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if (ee_actions[num] == SIM_ERRACTION_EXIT)
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exit (1);
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}
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enum execution_error
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execution_error_get_last_error (void)
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{
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return last_error;
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}
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void
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execution_error_clear_last_error (void)
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{
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last_error = SIM_ERR_NONE;
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}
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void
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execution_error_set_action (enum execution_error num, enum execution_error_action act)
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{
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ee_actions[num] = act;
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}
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