objtool: Fix bytes check of lea's rex_prefix
authorJiri Slaby <jslaby@suse.cz>
Mon, 5 Dec 2016 10:55:51 +0000 (11:55 +0100)
committerIngo Molnar <mingo@kernel.org>
Tue, 6 Dec 2016 08:20:59 +0000 (09:20 +0100)
commit69042bf2001b44e81cd86ab11a4637b9d9a14c5a
tree742bf7f1676233af8f0a83d673cea7938815de93
parentd9d04527c79f0f7d9186272866526e871ef4ac6f
objtool: Fix bytes check of lea's rex_prefix

For the "lea %(rsp), %rbp" case, we check if there is a rex_prefix.
But we check 'bytes' which is insn_byte_t[4] in rex_prefix (insn_field
structure). Therefore, the check is always true.

Instead, check 'nbytes' which is the right one.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
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>
Link: http://lkml.kernel.org/r/20161205105551.25917-1-jslaby@suse.cz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
tools/objtool/arch/x86/decode.c