| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 19 Aug 2014 22:26:12 +0200 From: Richard Weinberger <richard.weinberger@...il.com> To: Thomas Meyer <thomas@...3r.de> Cc: Valdis Kletnieks <Valdis.Kletnieks@...edu>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux@...rsten-knabe.de Subject: Re: [UML] 3.16 build without optimization fails On Tue, Aug 19, 2014 at 10:19 PM, Thomas Meyer <thomas@...3r.de> wrote: > Hi. > > Thanks for your answer. > > There goes my plan to better understand an UML kernel lock up by using a debugger... Everything gets optimised out with -O2 :-( Is it the filesystem/block lockup you saw some time ago? Maybe Thorsten can give more details. He sent me an patch off list a few days ago. > Can you give an example function that relies on this GCC feature? > > With kind regards > Thomas > > Am 19.08.2014 22:06 schrieb Valdis.Kletnieks@...edu: >> >> On Tue, 19 Aug 2014 21:12:10 +0200, Thomas Meyer said: >> > > Hi, >> > > >> > > the build with -O0 fails with: >> >> > > bug or feature? >> > > >> > > any ideas? >> >> Feature. The kernel is *known* to not build with -O0, because that >> disables *all* function inlining, and there's several functions that *have* >> to be inlined in order to function properly (most notably, anything >> that uses the gcc __builtin_return_address in a function that is expected >> to be inlined). -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists