On Tue, Jul 12, 2016 at 3:23 PM, Daniel Micay <[email protected]> wrote: > On Tue, 2016-07-12 at 15:08 -0400, Kees Cook wrote: >> On Mon, Jul 4, 2016 at 7:42 PM, Emese Revfy <[email protected]> >> wrote: >> > >> > The nocapture gcc attribute can be on functions only. >> > The attribute takes one or more unsigned integer constants as >> > parameters >> > that specify the function argument(s) of const char* type to >> > initify. >> > If the marked argument is a vararg then the plugin initifies >> > all vararg arguments. >> >> Why is this called "nocapture"? Not captured by what? It seems like >> it >> means "initify this if possible". Am I misunderstanding its purpose? > > It means they don't escape via that function, i.e. they aren't stored > anywhere to be used in any way after the call.
Ah, those arguments are confirmed to not be "captured" by that function, leaving them available to be moved to .init. Got it, thanks! -Kees -- Kees Cook Chrome OS & Brillo Security
