Booting from RAM about foboot

[xobs]

@mateusz-holenko The magic sequence must exist within the first 64 bytes. You don't want to place it at the start, since you're right that would cause it to execute the magic sequence as an opcode. It's documented somewhat in https://github.com/im-tomu/foboot/blob/master/doc/BOOT-SEQUENCE.md#ram-boot

Instead, you should place it a few words after the start, similar to how flags are implemented at

foboot/examples/riscv-blink/src/crt0-vexriscv.S

Line 13 in c7ee25b

.global trap_entry

[mateusz-holenko]

I see. I wasn't precise enough - it's clear from the source code that the magic does not have to be exactly at the beginning of the image.
I simply didn't recognize the implications of this fact and the possibility to add a jump instruction before the magic - my bad.

Thanks for the clarification!