Fail to run the Ds5 example project "Armv8-A SMP AArch64 Startup Code for Linaro bare-metal GCC - Arm DS-5 "

Hi, I try to run the example project of "Armv8-A SMP AArch64 Startup Code for Linaro bare-metal GCC - Arm®DS-5 ",  I do not change the debug configuration.

It can starts at and stops in the entry point:

Running from entry point
Execution stopped in EL3h mode at EL3:0x0000000080000000
On core ARMAEMv8-A_MP_0 (ID 0)
In startup.S
wait
EL3:0x0000000080000000 65,0 ldr x1, =el1_vectors

but when I press the F5 button to step in the next instruction , it fails to run to the next instruction but run to the address of 0x200:

step
Execution stopped in EL3h mode at EL3:0x0000000000000200
On core ARMAEMv8-A_MP_0 (ID 0)
EL3:0x0000000000000200 DCI 0xe7ff0010 ; ? Undefined

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