On 01/18/2012 01:26 PM, Linus Torvalds wrote: > On Wed, Jan 18, 2012 at 1:04 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote: >> >> Fair enough. Sigh. I still think an actual pseudo-register would be >> better. > > .. and that breaks existing binaries too, because the indexing is > based on offsets into "struct pt_regs", and while we *could* change > that - leave pt_regs untouched but add a new virtual register - it > would be problematic. > > We could add a whole new ptrace() access command (eg > PTRACE_GETSYSTEMREGSET), of course. But that's a lot of effort for > very little gain. > > So on the whole, putting it in eflags seemed like the *much* simpler approach. > I would have assumed it would be a new register set (which could be expanded in the future if we have additional system information to provide.) -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
