Cant launch app program from bootloader

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I am writing a minimal bootloader for SAMD51 which for now just launches the application image.
Changed BOOTPROT to reserve 32 KB.

Flashed bootloader at 0x00000000
Flahed App image at 0x00008000
Used .text=0x8000 in Tool Chain ->Memory Settings ( Tried 0x4000 too as suggestied in a post)

 

Use below code come bootloader main function to jump to app image.

 

    #define APPLICATION_SYSTEM_FLASH_START_ADDRESS 32768
    __set_MSP(*(uint32_t *) APPLICATION_SYSTEM_FLASH_START_ADDRESS);

    /* Rebase the vector table base address */
    SCB->VTOR = ((uint32_t) APPLICATION_SYSTEM_FLASH_START_ADDRESS & SCB_VTOR_TBLOFF_Msk);
    
    asm("bx %0" ::"r"(APPLICATION_SYSTEM_FLASH_START_ADDRESS + 4));

 

But it does not seem to do anything and results is reboot if WDT is enabled.

 

Could some one help understanding whats going wrong here ?

 

Last Edited: Tue. Oct 22, 2019 - 01:27 PM