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/*
* Copyright (c) 2014 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Kernel fatal error handler for ARM Cortex-M
*
* This module provides the _NanoFatalErrorHandler() routine for ARM Cortex-M.
*/
#include <toolchain.h>
#include <sections.h>
#include <inttypes.h>
#include <kernel.h>
#include <kernel_structs.h>
#ifdef CONFIG_PRINTK
#include <misc/printk.h>
#define PR_EXC(...) printk(__VA_ARGS__)
#else
#define PR_EXC(...)
#endif /* CONFIG_PRINTK */
/*
* Define a default ESF for use with _NanoFatalErrorHandler() in the event
* the caller does not have a NANO_ESF to pass
*/
const NANO_ESF _default_esf = {
{0xdeaddead}, /* r0/a1 */
{0xdeaddead}, /* r1/a2 */
{0xdeaddead}, /* r2/a3 */
{0xdeaddead}, /* r3/a4 */
{0xdeaddead}, /* r12/ip */
{0xdeaddead}, /* r14/lr */
{0xdeaddead}, /* r15/pc */
0xdeaddead, /* xpsr */
#ifdef CONFIG_FLOAT
{0xdeaddead, 0xdeaddead, 0xdeaddead, 0xdeaddead, /* s0 .. s3 */
0xdeaddead, 0xdeaddead, 0xdeaddead, 0xdeaddead, /* s4 .. s7 */
0xdeaddead, 0xdeaddead, 0xdeaddead, 0xdeaddead, /* s8 .. s11 */
0xdeaddead, 0xdeaddead, 0xdeaddead, 0xdeaddead}, /* s12 .. s15 */
0xdeaddead, /* fpscr */
0xdeaddead, /* undefined */
#endif
};
/**
*
* @brief Kernel fatal error handler
*
* This routine is called when fatal error conditions are detected by software
* and is responsible only for reporting the error. Once reported, it then
* invokes the user provided routine _SysFatalErrorHandler() which is
* responsible for implementing the error handling policy.
*
* The caller is expected to always provide a usable ESF. In the event that the
* fatal error does not have a hardware generated ESF, the caller should either
* create its own or use a pointer to the global default ESF <_default_esf>.
*
* @param reason the reason that the handler was called
* @param pEsf pointer to the exception stack frame
*
* @return This function does not return.
*/
FUNC_NORETURN void _NanoFatalErrorHandler(unsigned int reason,
const NANO_ESF *pEsf)
{
switch (reason) {
case _NANO_ERR_INVALID_TASK_EXIT:
PR_EXC("***** Invalid Exit Software Error! *****\n");
break;
#if defined(CONFIG_STACK_CANARIES)
case _NANO_ERR_STACK_CHK_FAIL:
PR_EXC("***** Stack Check Fail! *****\n");
break;
#endif /* CONFIG_STACK_CANARIES */
case _NANO_ERR_ALLOCATION_FAIL:
PR_EXC("**** Kernel Allocation Failure! ****\n");
break;
default:
PR_EXC("**** Unknown Fatal Error %d! ****\n", reason);
break;
}
PR_EXC("Current thread ID = %p\n"
"Faulting instruction address = 0x%" PRIx32 "\n",
k_current_get(), pEsf->pc);
/*
* Now that the error has been reported, call the user implemented
* policy
* to respond to the error. The decisions as to what responses are
* appropriate to the various errors are something the customer must
* decide.
*/
_SysFatalErrorHandler(reason, pEsf);
for (;;)
;
}
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