| 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: Wed, 10 Sep 2014 15:29:25 +0800 From: Chung-Lin Tang <chunglin_tang@...tor.com> To: <Valdis.Kletnieks@...edu>, Ley Foon Tan <lftan@...era.com> CC: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>, <lftan.linux@...il.com>, <cltang@...esourcery.com> Subject: Re: [PATCH v3 25/29] nios2: Module support On 14/9/10 5:25 AM, Valdis.Kletnieks@...edu wrote: > On Mon, 08 Sep 2014 17:22:36 +0800, Ley Foon Tan said: >> This patch adds support for loadable modules. >> >> Signed-off-by: Ley Foon Tan <lftan@...era.com> > >> +/* >> + * Modules should NOT be allocated with kmalloc for (obvious) reasons. >> + * But we do it for now to avoid relocation issues. CALL26/PCREL26 cannot reach >> + * from 0x80000000 (vmalloc area) to 0xc00000000 (kernel) (kmalloc returns >> + * addresses in 0xc0000000) >> + */ > > That's a nice scary comment to see. :) > > What's the long-term plan here? > We would probably need to add the ability to add trampolines in some way, though this of course impairs a little performance. Or if the default region of vmalloc can be configured to use the same 256MB region as the kernel. I wonder how MIPS (which has similar same-region call/jump instructions) deals with this? Chung-Lin -- 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