On Thu, 2015-03-12 at 12:51 -0300, Fabio Estevam wrote: > On Thu, Mar 12, 2015 at 12:13 AM, Scott Wood <scottwood@xxxxxxxxxxxxx> wrote: > > Use %pS for actual addresses, otherwise you'll get bad output > > on arches like ppc64 where %pF expects a function descriptor. > > From Documentation/printk-formats.txt: > > "On ia64, ppc64 and parisc64 architectures function pointers are > actually function descriptors which must first be resolved. The 'F' and > 'f' specifiers perform this resolution and then provide the same > functionality as the 'S' and 's' specifiers." > > ,so current code should work fine on ppc64, right? No. __builtin_return_address() returns a pointer to an instruction, not a function pointer descriptor. If you use %pF on the former, it'll print instruction opcodes as if they were the address. -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
