Build and linking mbed for a start address different then Flash origin

Hello,

I'm not sure if this is the right repo for my question. If not, please let me know.
We will implement a sort of bootloader (for FW updates) for our mbed devices.
We planed to put the bootloader at start of flash (and hence reserving the interrupt vectors for itself).
This means we need to move our mbed image by a given offset, hence mbed needs to be compiled and linked for another start address then it is now; furthermore the way mbed manages the interrupt vector table may necessary to be changed. May be the bootloader will have to do that in advance to the mbed image (by relocating the vector table to RAM prior to jump to mbed), if so the mbed internal mechanism may be deactivated.
My question:
- is it possible to relocate an mbed image without too much effort?
- If yes, how do we achieve that (where is the start address actually defined)?
- How do we modify (if necessary) the mbed internal vector table management to allow this relocation?

Thanks in advance for your help.

Kind Regards

Martin Tomasini

Start by tracing how the mbed image's link start address and interrupt vector table are defined and managed. Done would require a clear, supported approach for relocating the image and handling vector-table ownership with the bootloader.

Written by the indexing model from the issue text.