On Sat, Apr 23, 2016 at 4:08 AM, Ingo Molnar <[email protected]> wrote: > > * Kees Cook <[email protected]> wrote: > >> --- a/arch/x86/boot/compressed/string.c >> +++ b/arch/x86/boot/compressed/string.c >> @@ -1,7 +1,13 @@ >> +/* >> + * This provides an optimized implementation of memcpy, and a simplified >> + * implementation of memset and memmove, to avoid problems with the >> + * built-in implementations when running in the restricted decompression >> + * stub environment. >> + */ > > Does 'built in' here mean the compiler's implementation? > > We cannot call kernel built-in functions yet, so we have to duplicate > everything > we might need, right?
Right, I actually mean both: we can use neither gcc nor kernel built-ins. (I am fuzzy on why the gcc built-ins aren't available -- I think because they're not available for standalone builds.) -Kees > > Thanks, > > Ingo -- Kees Cook Chrome OS & Brillo Security
