On 10/03/16 04:28, Torsten Duwe wrote: > This can be applied on top of Petr Mladek's v4 rework of the ppc64le > live patching. Inspired by Balbir Singh's v5, information about the > callee's r2 is stored in a "reserved" 32 bit location in the caller's > stack frame, instead of 64 bits in the newly created mini frame 24(r1). > > It only needs to work for a local call, when caller's TOC == callee's > TOC, and along with the return address (LR) it's all within a 4GiB > range (+-31 bits). If the original call already was global, we are > allowed to restore any nonsense into r2, because the global caller > will restore its TOC anyway from the ABI compliant location 24(r1) > right after return. > > Hi, Torsten Sorry, I've had no time to test this. Caught up with something else for the moment. Hopefully I'll get a chance over the weekend. Have you tested this against Petr's sample changes to patch printk? Balbir Singh. -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
