Re: [RFC] gcc feature request: Moving blocks into sections

[Steven Rostedt]

On Tue, 2013-08-06 at 09:19 -0700, H. Peter Anvin wrote:
> On 08/06/2013 09:15 AM, Steven Rostedt wrote:
> > On Mon, 2013-08-05 at 14:43 -0700, H. Peter Anvin wrote:
> > 
> >> For unconditional jmp that should be pretty safe barring any fundamental
> >> changes to the instruction set, in which case we can enable it as
> >> needed, but for extra robustness it probably should skip prefix bytes.
> > 
> > Would the assembler add prefix bytes to:
> > 
> > 	jmp 1f
> > 
> 
> No, but if we ever end up doing MPX in the kernel, for example, we would
> have to put an MPX prefix on the jmp.

Well then we just have to update the rest of the jump label code :-)

-- Steve


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