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54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2015 Eistec AB
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* SPDX-License-Identifier: LGPL-2.1-only
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief Minimal test application for triggering a hard fault or equivalent
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*
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* @author Joakim Gebart <joakim.gebart@eistec.se>
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*
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* @}
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*/
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#include <stdio.h>
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#include <xtimer.h>
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#ifndef FORBIDDEN_ADDRESS
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/* Many platforms do not allow writes to address 0x00000000 */
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#define FORBIDDEN_ADDRESS (0x00000000u)
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#endif /* !defined(FORBIDDEN_ADDRESS) */
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#ifndef INVALID_INSTRUCTION
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/* Random garbage may crash the program as well. */
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#define INVALID_INSTRUCTION __asm__ volatile (".short 0xdead, 0xbeef, 0xcafe, 0xbabe\n")
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#endif /* !defined(INVALID_INSTRUCTION) */
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#define PRINT_MACRO(a) PRINT_MACRO2(a)
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#define PRINT_MACRO2(a) #a
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int main(void)
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{
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puts("Fault handler test application");
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printf("This application will crash by attempting to write to address 0x%08x\n",
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FORBIDDEN_ADDRESS);
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puts("Waiting 1 second before crashing...");
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xtimer_usleep(1000000lu);
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puts("Write to forbidden address " PRINT_MACRO(FORBIDDEN_ADDRESS));
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/* cppcheck-suppress nullPointer */
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*((volatile unsigned int *) FORBIDDEN_ADDRESS) = 12345u;
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/* cppcheck-suppress nullPointer */
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unsigned int readback = *((volatile unsigned int *) FORBIDDEN_ADDRESS);
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printf("readback: 0x%08x\n", readback);
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puts("We did not expect the application to survive the previous write.");
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puts("Trying to execute an invalid instruction");
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puts(PRINT_MACRO(INVALID_INSTRUCTION));
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INVALID_INSTRUCTION;
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puts("Failed to crash the program, hanging...");
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while (1) {}
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return 0;
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}
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