Re: [Nasm-devel] maybe a bug... this time?

[H. P. A. <hp...@zy...>]

On 08/04/2013 02:34 PM, Frank Kotler wrote:
> Sorry to bother you guys again, but I wonder if anyone has time to look 
> at this:
> http://forum.nasm.us/index.php?topic=1691.new#new
> 
> In short, "-f macho64" is generating an error about 32-bit addresses. 
> "-f elf64" and "-f win64" seem to work. I can't see anything wrong with 
> the guy's code. Adding "bits 64" or "use64" as a section attribute seem 
> not to help... Help!
> 
> Best,
> Frank
> 


default rel
global _start
_start:
    mov al,'*'
    mov byte [Msg+rsi],al   ; ERROR


The problem is that Msg here isn't PC-relative since it has an index.
This is presumably illegal in MachO64.  Instead he should:

	lea rdi,[Msg]
	mov [rdi+rsi],al

Note lea, not mov...

	-hpa