修改LR_IROM1 0x08004000 后main函数无法进入？

#define RT_APP_PART_ADDR 0x08004000
/**
* Function ota_app_vtor_reconfig
* Description Set Vector Table base location to the start addr of app(RT_APP_PART_ADDR).
*/
static int ota_app_vtor_reconfig(void)
{
#define NVIC_VTOR_MASK 0x3FFFFF80
/* Set the Vector Table base location by user application firmware definition */
SCB->VTOR = RT_APP_PART_ADDR & NVIC_VTOR_MASK;
return 0;
}
INIT_BOARD_EXPORT(ota_app_vtor_reconfig);

#define NVIC_VTOR_MASK 0x3FFFFF80
/* Set the Vector Table base location by user application firmware definition */
SCB->VTOR = RT_APP_PART_ADDR & NVIC_VTOR_MASK;
return 0;
}
INIT_BOARD_EXPORT(ota_app_vtor_reconfig);