Messages in this thread Patch in this message | | | From | Masami Hiramatsu <> | Subject | [PATCH] x86/decoder: Update UD0 to have operands | Date | Fri, 9 Feb 2018 00:17:50 +0900 |
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According to the December 2017 Intel SDM publication, UD0 now has 2 operands by MODRM byte. So it's length should be 3 bytes.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Reported-by: kbuild test robot <fengguang.wu@intel.com> --- arch/x86/lib/x86-opcode-map.txt | 3 ++- tools/objtool/arch/x86/lib/x86-opcode-map.txt | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/lib/x86-opcode-map.txt b/arch/x86/lib/x86-opcode-map.txt index e0b85930dd77..131a76b3fa5e 100644 --- a/arch/x86/lib/x86-opcode-map.txt +++ b/arch/x86/lib/x86-opcode-map.txt @@ -607,7 +607,8 @@ fb: psubq Pq,Qq | vpsubq Vx,Hx,Wx (66),(v1) fc: paddb Pq,Qq | vpaddb Vx,Hx,Wx (66),(v1) fd: paddw Pq,Qq | vpaddw Vx,Hx,Wx (66),(v1) fe: paddd Pq,Qq | vpaddd Vx,Hx,Wx (66),(v1) -ff: UD0 +# UD0 is special. This is changed in newer processor to have operands. +ff: UD0 Gd,Ed EndTable Table: 3-byte opcode 1 (0x0f 0x38) diff --git a/tools/objtool/arch/x86/lib/x86-opcode-map.txt b/tools/objtool/arch/x86/lib/x86-opcode-map.txt index e0b85930dd77..131a76b3fa5e 100644 --- a/tools/objtool/arch/x86/lib/x86-opcode-map.txt +++ b/tools/objtool/arch/x86/lib/x86-opcode-map.txt @@ -607,7 +607,8 @@ fb: psubq Pq,Qq | vpsubq Vx,Hx,Wx (66),(v1) fc: paddb Pq,Qq | vpaddb Vx,Hx,Wx (66),(v1) fd: paddw Pq,Qq | vpaddw Vx,Hx,Wx (66),(v1) fe: paddd Pq,Qq | vpaddd Vx,Hx,Wx (66),(v1) -ff: UD0 +# UD0 is special. This is changed in newer processor to have operands. +ff: UD0 Gd,Ed EndTable Table: 3-byte opcode 1 (0x0f 0x38)
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