1 /*
2 * Copyright (c) 2012-2014 Wind River Systems, Inc.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/sys/printk.h>
9 #include <zephyr/debug/coredump.h>
10
11 #ifdef CONFIG_COVERAGE_DUMP
12 #include <zephyr/debug/gcov.h>
13 #endif
14
15 struct k_thread crash_thread;
16 K_THREAD_STACK_DEFINE(crash_stack, CONFIG_MAIN_STACK_SIZE);
17
k_sys_fatal_error_handler(unsigned int reason,const struct arch_esf * pEsf)18 void k_sys_fatal_error_handler(unsigned int reason, const struct arch_esf *pEsf)
19 {
20 ARG_UNUSED(pEsf);
21
22 printk("%s is expected; reason = %u; halting ...\n", __func__, reason);
23
24 #ifdef CONFIG_COVERAGE_DUMP
25 gcov_coverage_dump(); /* LCOV_EXCL_LINE */
26 #endif
27 k_fatal_halt(reason);
28 }
29
30 /* Turn off optimizations to prevent the compiler from optimizing this away
31 * due to the null pointer dereference.
32 */
func_3(uint32_t * addr)33 __no_optimization void func_3(uint32_t *addr)
34 {
35 #if defined(CONFIG_BOARD_M2GL025_MIV) || \
36 defined(CONFIG_BOARD_HIFIVE1) || \
37 defined(CONFIG_BOARD_HIFIVE_UNLEASHED) || \
38 defined(CONFIG_BOARD_HIFIVE_UNMATCHED) || \
39 defined(CONFIG_BOARD_LONGAN_NANO) || \
40 defined(CONFIG_BOARD_QEMU_XTENSA) || \
41 defined(CONFIG_BOARD_RISCV32_VIRTUAL) || \
42 defined(CONFIG_SOC_FAMILY_INTEL_ISH) || \
43 defined(CONFIG_SOC_FAMILY_INTEL_ADSP)
44 ARG_UNUSED(addr);
45 /* Call k_panic() directly so Renode doesn't pause execution.
46 * Needed on ADSP as well, since null pointer derefence doesn't
47 * fault as the lowest memory region is writable. SOF uses k_panic
48 * a lot, so it's good to check that it causes a coredump.
49 */
50 k_panic();
51 #elif !defined(CONFIG_CPU_CORTEX_M)
52 /* For null pointer reference */
53 *addr = 0;
54 #else
55 ARG_UNUSED(addr);
56 /* Dereferencing null-pointer in TrustZone-enabled
57 * builds may crash the system, so use, instead an
58 * undefined instruction to trigger a CPU fault.
59 */
60 __asm__ volatile("udf #0" : : : );
61 #endif
62 }
63
func_2(uint32_t * addr)64 void func_2(uint32_t *addr)
65 {
66 func_3(addr);
67 }
68
func_1(uint32_t * addr)69 void func_1(uint32_t *addr)
70 {
71 func_2(addr);
72 }
73
crash_entry(void * p1,void * p2,void * p3)74 static void crash_entry(void *p1, void *p2, void *p3)
75 {
76 printk("Coredump: %s\n", CONFIG_BOARD);
77
78 func_1(0);
79 }
80
main(void)81 int main(void)
82 {
83 k_thread_create(&crash_thread, crash_stack, CONFIG_MAIN_STACK_SIZE, crash_entry, NULL, NULL,
84 NULL, -1, IS_ENABLED(CONFIG_USERSPACE) ? K_USER : 0, K_NO_WAIT);
85 return 0;
86 }
87
