On Thu, Feb 25, 2010 at 5:56 PM, Mikael Pettersson <mikpe@xxxxxxxx> wrote: > I fear that the only portable (across compiler versions) and safe > solution is to invoke an assembly-coded dummy function with prototype > > void use(void *p); > > and rewrite the code above as > > { > u32 temp[...]; > ... > memset(temp, 0, sizeof temp); > use(temp); > } > > This forces the compiler to consider the buffer live after the > memset, so the memset cannot be eliminated. So is there some "do not optimize" GCC magic that we could use for a memzero_secret() helper function? Pekka -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html