Problem with the bootloader start adress

RE: Problem with the bootloader start adress

Pavan kumar — Wed, 07 Sep 2016 16:47:27 GMT

Yes thats generally happend it take some time to verify signature.

RE: Problem with the bootloader start adress

Arjun — Wed, 07 Sep 2016 16:42:23 GMT

Hi Pavan,

Thanks for sharing the code. Appreciate it.! Do u also observe that signature verification takes quite a long time.

Best, Arjun

RE: Problem with the bootloader start adress

Pavan kumar — Wed, 07 Sep 2016 16:28:02 GMT

This is the ported code for Security_SVC_Handler

void __attribute__ (( naked )) Security_SVC_Handler(void)

{ const uint32_t sec_svc_handler = 0x0003DC00; const uint32_t svcall_irq_offset = 0x2c;

__asm volatile(
		"mov r2,%0\t\n"
		"add r2,r2,#44\t\n"
		"ldr r2,[r2]\t\n"
		"bx r2\t\n"
		".align\t\n"
		:: "r" (sec_svc_handler), "r" (svcall_irq_offset)
		: "r2"
		);

}

RE: Problem with the bootloader start adress

Arjun — Wed, 07 Sep 2016 16:02:12 GMT

Hi Pavan,

Could you share with us the porting u did for gcc?

Thanks in Advance, Arjun

RE: Problem with the bootloader start adress

Pavan kumar — Wed, 10 Feb 2016 17:54:05 GMT

yes you need to port that for gcc as like ARM

RE: Problem with the bootloader start adress

[Florian] — Wed, 10 Feb 2016 17:53:06 GMT

You are right! Is mixed up the regular SVC_Handler and the Security_SVC_Handler. The Security_SVC_Handler is only available for __CC_ARM

RE: Problem with the bootloader start adress

Pavan kumar — Wed, 10 Feb 2016 17:43:19 GMT

Still confused do you talking about the file SDK\examples\dfu\experimental\bootloader_signing\dfu_ble_svc.c there is no implementation for void attribute (( naked )) Security_SVC_Handler(void) under #elif defined ( GNUC ) right? its only implemented under #if defined ( __CC_ARM ) as __asm void Security_SVC_Handler(void). If yes can you please share that .c file by just highlighting Security_SVC_Handler

RE: Problem with the bootloader start adress

Pavan kumar — Wed, 10 Feb 2016 17:21:50 GMT

I'm not sure which SDK that you are using but I didn't see any implementation for void Security_SVC_Handler(void) in SDK9 or SDK10 in GNUC It only there at definition of __CC_ARM

RE: Problem with the bootloader start adress

[Florian] — Wed, 10 Feb 2016 16:57:31 GMT

Hi Pavan, thanks for your fast response. I already read the post you mentioned, but I do not really understand what is missing if gcc is used. As far as I understand this post, it is referring to 'dfu_ble_svc.c'. This file is already part of the bootloader and it contains an implementation of 'Security_SVC_Handler' if 'GNUC' is defined. So can you give me a hint what is missing?

I am am using nRF51 SDK v10.0.0_dc26b5e from developer.nordicsemi.com/.../nRF51_SDK_10.0.0_dc26b5e.zip.

RE: Problem with the bootloader start adress

Pavan kumar — Wed, 10 Feb 2016 16:23:37 GMT

Yes Florian even I face this issue because cal to SVC_Handler is not defined for gcc, only defined for Keil we need to define our own this link will help you devzone.nordicsemi.com/.../ look at comments section

RE: Problem with the bootloader start adress

[Florian] — Wed, 10 Feb 2016 16:18:41 GMT

Hi,

I have a similar issue. After changing the linker script and adding the macro SIGNING to the makefile is was able to launch the signing bootloader. But when I try to upload the new firmware 'dfu_init_prevalidate' always returns NRF_ERROR_SVC_HANDLER_MISSING. I tried SDK v10 and v11 but the problem stays the same.

I used the following commands to flash the code

nrfjprog -e
nrfjprog --program s110_nrf51_8.0.0_softdevice.hex
nrfjprog --program nrf51422_xxac_s110.hex
nrfjprog --program nrf_sec.hex

RE: Problem with the bootloader start adress

Pavan kumar — Thu, 21 Jan 2016 17:02:08 GMT

Yes Luckily I got the solution for that we need to define the SIGNING in the make file so that it writes the BOOTLOADER_REGION_START as 39c00 you can have a look at dfu_types.h that solves my issue

RE: Problem with the bootloader start adress

Pavan kumar — Thu, 21 Jan 2016 15:51:51 GMT

Hi Spockeli you can find that in the image in the test result.rar any how I added in my question the linker script that I'm using Thanks and regards

RE: Problem with the bootloader start adress

bjorn-spockeli — Thu, 21 Jan 2016 14:46:23 GMT

Can you share your linker script?