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Problem of debugging TrustZone Helloworld example with DS-5 V5.22.0

Eric

I am using DS-5 V5.22.0 to debug the TrustZone example given (i.e. TrustZone-versatile-A9x4-example and TrustZone-Cortex-A9x4-FVP-example) by the ARM. My experiment platform is the Exynos4412, which is a ARM A9x4 platform.

I can build the project and get the Binaries (TrustZone-versatile.axf). And when I debugging the project, I get the error message from the DS-5 “Commands”, which is shown as follows:

Connected to stopped target ARM FVP - VE_Cortex_A9x4

Execution stopped in SVC mode at S:0x00000000

On core ARM_Cortex-A9MP_0 (ID 0)

cd "E:\ARMWorkSpace"

S:0x00000000   DCI      0xe7ff0010 ; ? Undefined

Working directory "E:\ARMWorkSpace"

loadfile "E:\ARMWorkSpace\TrustZone\TrustZone-versatile.axf"

Loaded section SECURE_EXE: S:0x80000000 ~ S:0x80001303 (size 0x1304)

Loaded section SECURE_EXE: S:0x80001304 ~ S:0x80001307 (size 0x4)

Loaded section NORMAL_IMAGE: S:0x80100000 ~ S:0x80101047 (size 0x1048)

Entry point S:0x80000000

Semihosting server socket created at port 8001

Semihosting enabled automatically due to semihosting symbol detected in image 'TrustZone-versatile.axf'

set debug-from *$ENTRYPOINT

start

Starting target with image E:\ARMWorkSpace\TrustZone\TrustZone-versatile.axf

Running from entry point

Execution stopped in SVC mode at S:0x80000000

On core ARM_Cortex-A9MP_0 (ID 0)

In startup_secure.s

S:0x80000000   48,0   MSR CPSR_c, #Mode_SVC:OR:I_Bit:OR:F_Bit

Then the press F8, it continues give:

wait

continue

Execution stopped in SVC mode at S:0x80000914

On core ARM_Cortex-A9MP_0 (ID 0)

S:0x80000914   ITTT     CS

Until it reports:

Execution stopped in ABT mode at S:0x0000000C

On core ARM_Cortex-A9MP_0 (ID 0)

ERROR(CMD256-TAD10-NAL23):

! Unable to display contents at location "S:0x0000000C"

! Failed to read 4 bytes from address S:0x0000000C

! Memory read from model failed.

-------------------------------------------------------------------------------------------------------------------------------------------------

And then I restart the platform and debug from the start. I follow the readme.html and set breakpoints:

1. on Secure world's main() with b main_secure.c::main
2. on Monitor initialization code in monitor.s with b monitorInit
3. on the function yield().
The project successfully go through the first two breakpoints, but it stop at the function “yield()”, the output is given as below:

Execution stopped in SVC mode due to a breakpoint or watchpoint: S:0x800001E8

On core ARM_Cortex-A9MP_1 (ID 1)

In main_secure.c

S:0x800001E8   39,8   for (i = 0; i < 10; i++)

^^^^^^^

wait

next

Execution stopped in SVC mode at S:0x800001EC

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x800001EC   41,5   printf("Hello from Secure world\n");

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

In _seterr (no debug info)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at S:0x80000B44

On core ARM_Cortex-A9MP_1 (ID 1)

S:0x80000B44   LDR      r1,[r0,#0xc]

wait

continue

Execution stopped in SVC mode at breakpoint 4: S:0x800001F4

On core ARM_Cortex-A9MP_3 (ID 3)

In main_secure.c

S:0x800001F4   42,5 yield();

wait

continue

Execution stopped in SVC mode at breakpoint 4: S:0x800001F4

On core ARM_Cortex-A9MP_0 (ID 0)

S:0x800001F4   42,5 yield();

wait

continue

Execution stopped in ABT mode at S:0x0000000C

On core ARM_Cortex-A9MP_0 (ID 0)

ERROR(CMD256-TAD10-NAL23):

! Unable to display contents at location "S:0x0000000C"

! Failed to read 4 bytes from address S:0x0000000C

! Memory read from model failed.

It seems that the yield() function doesn’t work, which means the “SMC #0” doesn’t work. Can anyone help me with the problem and get the expected output (i.e. printf hello from secure world and non-secure world) in the readme.html?