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[Bug binutils/13668] x86: objdump gets the wrong length for 66-prefixed
[Bug binutils/13668] x86: objdump gets the wrong length for 66-prefixed direct jumps in 64-bit mode
Fri, 10 Feb 2012 17:08:55 +0000
--- Comment #2 from Mark Seaborn <address@hidden> 2012-02-10 17:08:55 UTC ---
Yes, you're right. I was testing on an Intel machine. When I tested on an AMD
machine, it produced:
$ gcc test.c -o test -m64 && ./test
operand size is 2 bytes
It looks like Intel failed to copy AMD in this regard. The Intel docs
implicitly acknowledge this and say that the behaviour of this instruction is
Ideally objdump's disassembler would treat this byte sequence as undefined.
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