单片机使用STM32F103VcT6时CODEMX 生成CODEIDE平台的代码没有启动rt_thread的内核？

//这是CODEmx生成的CODEIDE平台的代码
Reset_Handler:
/* Call the clock system initialization function.*/
    bl  SystemInit
/* Copy the data segment initializers from flash to SRAM */
  ldr r0, =_sdata
  ldr r1, =_edata
  ldr r2, =_sidata
  movs r3, #0
  b LoopCopyDataInit
CopyDataInit:
  ldr r4, [r2, r3]
  str r4, [r0, r3]
  adds r3, r3, #4
LoopCopyDataInit:
  adds r4, r0, r3
  cmp r4, r1
  bcc CopyDataInit
/* Zero fill the bss segment. */
  ldr r2, =_sbss
  ldr r4, =_ebss
  movs r3, #0
  b LoopFillZerobss
FillZerobss:
  str  r3, [r2]
  adds r2, r2, #4
LoopFillZerobss:
  cmp r2, r4
  bcc FillZerobss
/* Call static constructors */
    bl __libc_init_array
/* Call the application's entry point.*/
  bl main
  bx lr
.size Reset_Handler, .-Reset_Handler