From: Oleg Nesterov <oleg@redhat.com>
Date: Sun, 6 Apr 2014 19:53:47 +0000 (+0200)
Subject: uprobes/x86: Emulate relative conditional "short" jmp's
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~34^2~40^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f95505bc18a026ef7d3dfdbce4e5b31b3e4fc1b;p=pandora-kernel.git

uprobes/x86: Emulate relative conditional "short" jmp's

Teach branch_emulate_op() to emulate the conditional "short" jmp's which
check regs->flags.

Note: this doesn't support jcxz/jcexz, loope/loopz, and loopne/loopnz.
They all are rel8 and thus they can't trigger the problem, but perhaps
we will add the support in future just for completeness.

Reported-by: Jonathan Lebon <jlebon@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Jim Keniston <jkenisto@us.ibm.com>
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