linux-kernel - [patch] fix up smp alternatives on x86-64

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 28 Aug 2006 11:20:23 +0200
From:	Gerd Hoffmann <kraxel@...e.de>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Cc:	Andreas Kleen <ak@...e.de>
Subject: [patch] fix up smp alternatives on x86-64

Don't use alternative_smp() in for __raw_spin_lock.  gcc
sometimes generates rip-relative addressing, so we can't
simply copy the instruction to another place.

Replace some leftover "lock;" with LOCK_PREFIX.

Fillup space with 0x90 (nop) instead of 0x42, so
"objdump -d -j .smp_altinstr_replacement vmlinux" gives more
readable results.

-- 
Gerd Hoffmann <kraxel@...e.de>
http://www.suse.de/~kraxel/julika-dora.jpeg

View attachment "smpalt-fixup" of type "text/plain" (3250 bytes)