From: Denys Vlasenko Date: Thu, 12 Feb 2015 19:18:51 +0000 (+0100) Subject: uprobes/x86: Fix 1-byte opcode tables X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~27^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67fc809217dc7fd793211585b2a8d7b61715d06b;p=pandora-kernel.git uprobes/x86: Fix 1-byte opcode tables This change fixes 1-byte opcode tables so that only insns for which we have real reasons to disallow probing are marked with unset bits. To that end: Set bits for all prefix bytes. Their setting is ignored anyway - we check the bitmap against OPCODE1(insn), not against first byte. Keeping them set to 0 only confuses code reader with "why we don't support that opcode" question. Thus: enable bytes c4,c5 in 64-bit mode (VEX prefixes). Byte 62 (EVEX prefix) is not yet enabled since insn decoder does not support that yet. For 32-bit mode, enable probing of opcodes 63 (arpl) and d6 (salc). They don't require any special handling. For 64-bit mode, disable 9a and ea - these undefined opcodes were mistakenly left enabled. Signed-off-by: Denys Vlasenko Cc: Andy Lutomirski Cc: Jim Keniston Cc: Masami Hiramatsu Cc: Oleg Nesterov Cc: Srikar Dronamraju Link: http://lkml.kernel.org/r/1423768732-32194-2-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed