On 07/02/2012 12:34 PM, Timur Tabi wrote: > Scott Wood wrote: > >> Hmm. The comment says, "XER, CTR, and LR are currently listed as >> clobbers because it's uncertain whether they will be clobbered." Maybe >> it dates back to when the ABI was still being discussed? Timur, do you >> recall? > > Nope, sorry. I'm sure we discussed this and looked at the code. My guess > is that we weren't certain what the compiler was going to do at the time.
I'm not sure how the compiler is involved here -- we're just telling it what our asm code (and the asm code in the hypervisor) will do. > I'm still a little confused. Which inline assembly code is clobbering LR? > Are you talking about the "BL" instruction, which wasn't there before? Yes, I didn't realize that LR had been in the clobber list before that. -Scott -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
