hardfault_handler_gcc.c

/**
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#include "sdk_common.h"
#if NRF_MODULE_ENABLED(HARDFAULT_HANDLER)
#include <stdint.h>
#include "compiler_abstraction.h"

void HardFault_Handler(void) __attribute__(( naked ));

void HardFault_Handler(void)
{
    __ASM volatile(
    "   .syntax unified                        \n"

    "   ldr   r0, =0xFFFFFFFD                  \n"
    "   cmp   r0, lr                           \n"
    "   bne   HardFault_Handler_ChooseMSP      \n"
    /* Reading PSP into R0 */
    "   mrs   r0, PSP                          \n"
    "   b     HardFault_Handler_Continue       \n"
    "HardFault_Handler_ChooseMSP:              \n"
    /* Reading MSP into R0 */
    "   mrs   r0, MSP                          \n"
    /* -----------------------------------------------------------------
     * If we have selected MSP check if we may use stack safetly.
     * If not - reset the stack to the initial value. */
    "   ldr   r1, =__StackTop                  \n"
    "   ldr   r2, =__StackLimit                \n"

    /* MSP is in the range of the stack area */
    "   cmp   r0, r1                           \n"
    "   bhi   HardFault_MoveSP                 \n"
    "   cmp   r0, r2                           \n"
    "   bhi   HardFault_Handler_Continue       \n"
    /* ----------------------------------------------------------------- */
    "HardFault_MoveSP:                         \n"
    "   mov   SP, r1                           \n"
    "   movs  r0, #0                           \n"

    "HardFault_Handler_Continue:               \n"
    "   ldr r3, =HardFault_c_handler           \n"
    "   bx r3                                  \n"

    "   .align                                 \n"
    );
}
#endif //NRF_MODULE_ENABLED(HARDFAULT_HANDLER)