Padding end of Zephyr application

[kpreiss]

Hi,

We need the ability to pad the end of our Zephyr application for 8 byte alignment.  Is there a way to do this?

Thanks

[kpreiss]

Hi Sigurd,

Our Zephyr application images are encrypted and require the end FLASH address to fall on an 8 byte boundary.  We use our own custom non-Zephyr bootloader to decrypt the Zephyr application from SPIFLASH prior to programming into FLASH memory.

We use a custom linker script file to locate variables in certain sections of SRAM and FLASH memory.  Is there a simple way to modify the alignment of code/data at the end of FLASH memory?

In the past, a simple ". = ALIGN(8);" statement in the linker script file will work to pad memory to an 8 byte alignment at the end of FLASH.

Thanks!

[Vidar Berg]

As you are already working with a custom linker script, maybe you can add a padding section at the end. Something like this:

.padding : ALIGN(8)
{   
    LONG(0xE015E015)
} > FLASH

The LONG() is just a constant 4 byte word which will be added to the end of the FW image.