Re: ELF R_AVR_13_PCREL Relocation

Jeff Barlow <[email protected]> Wed, 18 Feb 2015 18:59:55 -0800

Newsgroups	gmane.comp.hardware.avr.gcc
Message-ID	<[email protected]>

On 02/18/2015 06:11 PM, Dylan McKay wrote:
>
> This relocation is solely for the relative `jmp` and `call` instructions
> (if I'm not mistaken).
>
> Both of these instructions have exactly 12 bits for their target
> address. Why is the relocation 13 bits then?

The resulting LSB of of those relocations is always zero, of course. The 
12 bits in the instructions are bits 1 - 12. With the assumed zero LSB 
that's 13 bits total.

-- 
Later,
Jeff