Detect stack overflow

[YoIs_1298666]

Hello,

We would like to prepare the detection of stack overflow.

We will clear the last 4bytes of stack pointer address to 0x00000000 . And  we will detect the stack overlow by reading these 4bytes whether stack pointer has been written.

How to read/write the last 4bytes

    *(reg32 *)(CYDEV_SRAM_BASE + CYDEV_SRAM_SIZE - CYDEV_STACK_SIZE)

Is this correct?

for example

[In case of clearing the last 4bytes of stack pointer to 0x00000000]

        uint32 check_sp_ov;

                 ......

        check_sp_ov = 0x00000000;

        *(reg32 *)(CYDEV_SRAM_BASE + CYDEV_SRAM_SIZE - CYDEV_STACK_SIZE) = check_sp_ov;

[In case of checking the last 4bytes of stack pointer]

        if( *(reg32 *)(CYDEV_SRAM_BASE + CYDEV_SRAM_SIZE - CYDEV_STACK_SIZE) != 0x0)

        {

               error processing code

        }

Best regards,

Yocchi