Revision 12a78d43de767eaf8fb272facb7a7b6f2dc6a9df authored by Masami Hiramatsu on 24 November 2017, 04:56:30 UTC, committed by Ingo Molnar on 24 November 2017, 07:36:12 UTC
The kbuild test robot reported this build warning: Warning: arch/x86/tools/test_get_len found difference at <jump_table>:ffffffff8103dd2c Warning: ffffffff8103dd82: f6 09 d8 testb $0xd8,(%rcx) Warning: objdump says 3 bytes, but insn_get_length() says 2 Warning: decoded and checked 1569014 instructions with 1 warnings This sequence seems to be a new instruction not in the opcode map in the Intel SDM. The instruction sequence is "F6 09 d8", means Group3(F6), MOD(00)REG(001)RM(001), and 0xd8. Intel SDM vol2 A.4 Table A-6 said the table index in the group is "Encoding of Bits 5,4,3 of the ModR/M Byte (bits 2,1,0 in parenthesis)" In that table, opcodes listed by the index REG bits as: 000 001 010 011 100 101 110 111 TEST Ib/Iz,(undefined),NOT,NEG,MUL AL/rAX,IMUL AL/rAX,DIV AL/rAX,IDIV AL/rAX So, it seems TEST Ib is assigned to 001. Add the new pattern. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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File | Mode | Size |
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Kconfig | -rw-r--r-- | 1.3 KB |
Makefile | -rw-r--r-- | 378 bytes |
acl.c | -rw-r--r-- | 5.7 KB |
acl.h | -rw-r--r-- | 1.5 KB |
balloc.c | -rw-r--r-- | 45.1 KB |
dir.c | -rw-r--r-- | 17.5 KB |
ext2.h | -rw-r--r-- | 28.2 KB |
file.c | -rw-r--r-- | 5.2 KB |
ialloc.c | -rw-r--r-- | 18.4 KB |
inode.c | -rw-r--r-- | 47.1 KB |
ioctl.c | -rw-r--r-- | 4.3 KB |
namei.c | -rw-r--r-- | 9.9 KB |
super.c | -rw-r--r-- | 44.1 KB |
symlink.c | -rw-r--r-- | 864 bytes |
xattr.c | -rw-r--r-- | 29.0 KB |
xattr.h | -rw-r--r-- | 3.3 KB |
xattr_security.c | -rw-r--r-- | 1.4 KB |
xattr_trusted.c | -rw-r--r-- | 1.1 KB |
xattr_user.c | -rw-r--r-- | 1.2 KB |
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