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- /* err.c --- handle errors for RX simulator.
- Copyright (C) 2008-2022 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/>. */
- /* This must come before any other includes. */
- #include "defs.h"
- #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 (void)
- {
- /* 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_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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