What is your 'bootloader' meaning? Is it Chapter 14 Kinetis ROM Bootloader?
if so, do you use below code to jump to bootloader?
void (*runBootloader)(void * arg);
runBootloaderAddress = **(uint32_t **)(0x1c00001c);
runBootloader = (void (*)(void * arg))runBootloaderAddress;
runBootloader(NULL);