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(parent: 48c7a25) | patch
x86/alternatives: Use optimized NOPs for padding
authorBorislav Petkov <bp@suse.de>
Sat, 10 Jan 2015 19:34:07 +0000 (20:34 +0100)
committerBorislav Petkov <bp@suse.de>
Mon, 23 Feb 2015 12:44:12 +0000 (13:44 +0100)
commit4fd4b6e5537cec5b56db0b22546dd439ebb26830
tree6a6ba144ac6e23d7fd71a70f4102cf46f7955f6ctree | snapshot
parent48c7a2509f9e237d8465399d9cdfe487d3212a23commit | diff
x86/alternatives: Use optimized NOPs for padding

Alternatives allow now for an empty old instruction. In this case we go
and pad the space with NOPs at assembly time. However, there are the
optimal, longer NOPs which should be used. Do that at patching time by
adding alt_instr.padlen-sized NOPs at the old instruction address.

Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Borislav Petkov <bp@suse.de>
arch/x86/kernel/alternative.c diff | blob | history
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