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/* err.c --- handle errors for RX simulator.
Copyright (C) 2008-2020 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of the GNU simulators.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include "err.h"
static unsigned char ee_actions[SIM_ERR_NUM_ERRORS];
static enum execution_error last_error;
static void
ee_overrides ()
{
/* GCC may initialize a bitfield by reading the uninitialized byte,
masking in the bitfield, and writing the byte back out. */
ee_actions[SIM_ERR_READ_UNWRITTEN_BYTES] = SIM_ERRACTION_IGNORE;
/* This breaks stack unwinding for exceptions because it leaves
MC_PUSHED_PC tags in the unwound stack frames. */
ee_actions[SIM_ERR_CORRUPT_STACK] = SIM_ERRACTION_IGNORE;
}
void
execution_error_init_standalone (void)
{
int i;
for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
ee_actions[i] = SIM_ERRACTION_EXIT;
ee_overrides ();
}
void
execution_error_init_debugger (void)
{
int i;
for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
ee_actions[i] = SIM_ERRACTION_DEBUG;
ee_overrides ();
}
void
execution_error_exit_all (void)
{
int i;
for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
ee_actions[i] = SIM_ERRACTION_EXIT;
}
void
execution_error_warn_all (void)
{
int i;
for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
ee_actions[i] = SIM_ERRACTION_WARN;
}
void
execution_error_ignore_all (void)
{
int i;
for (i = 0; i < SIM_ERR_NUM_ERRORS; i++)
ee_actions[i] = SIM_ERRACTION_IGNORE;
}
void
execution_error (enum execution_error num, unsigned long address)
{
if (ee_actions[num] != SIM_ERRACTION_IGNORE)
last_error = num;
if (ee_actions[num] == SIM_ERRACTION_EXIT
|| ee_actions[num] == SIM_ERRACTION_WARN)
{
switch (num)
{
case SIM_ERR_READ_UNWRITTEN_PAGES:
case SIM_ERR_READ_UNWRITTEN_BYTES:
printf("Read from unwritten memory at 0x%lx\n", address);
break;
case SIM_ERR_NULL_POINTER_DEREFERENCE:
printf ("NULL pointer dereference\n");
break;
case SIM_ERR_CORRUPT_STACK:
printf ("Stack corruption detected at 0x%lx\n", address);
break;
default:
printf ("Unknown execution error %d\n", num);
exit (1);
}
}
if (ee_actions[num] == SIM_ERRACTION_EXIT)
exit (1);
}
enum execution_error
execution_error_get_last_error (void)
{
return last_error;
}
void
execution_error_clear_last_error (void)
{
last_error = SIM_ERR_NONE;
}
void
execution_error_set_action (enum execution_error num, enum execution_error_action act)
{
ee_actions[num] = act;
}
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