Re: [PATCH 1/1] x86: fix text_poke

["H. Peter Anvin" <hpa@zytor.com>]

Mathieu Desnoyers wrote:
> 
> Yes, the immediate values, in general, only need to do atomic writes,
> because I have taken care of placing the mov instruction in the correct
> alignment so its immediate value happens to be aligned in memory.
> However, the latest optimisation I did to change a conditional branch
> into a jump when the correct code pattern is detected :
> 
> mov, test, bne short
> into a
> nop2, nop2, nop1, jmp short
> 
> or
> 
> mov, test, bne near
> into a
> nop2, nop2, nop1, jmp near
> 

And how, pray tell, do you deal with the fact that:

a) the EFLAGS may be live on exit;
b) there might be a jump into the middle of this instruction sequence?

	-hpa