• Kees Cook's avatar
    x86/asm: Add suffix macro for GEN_*_RMWcc() · df340524
    Kees Cook authored
    The coming x86 refcount protection needs to be able to add trailing
    instructions to the GEN_*_RMWcc() operations. This extracts the
    difference between the goto/non-goto cases so the helper macros
    can be defined outside the #ifdef cases. Additionally adds argument
    naming to the resulting asm for referencing from suffixed
    instructions, and adds clobbers for "cc", and "cx" to let suffixes
    use _ASM_CX, and retain any set flags.
    Signed-off-by: default avatarKees Cook <keescook@chromium.org>
    Cc: Alexey Dobriyan <adobriyan@gmail.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Christoph Hellwig <hch@infradead.org>
    Cc: David S. Miller <davem@davemloft.net>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Cc: Elena Reshetova <elena.reshetova@intel.com>
    Cc: Eric Biggers <ebiggers3@gmail.com>
    Cc: Eric W. Biederman <ebiederm@xmission.com>
    Cc: Greg KH <gregkh@linuxfoundation.org>
    Cc: Hans Liljestrand <ishkamiel@gmail.com>
    Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
    Cc: Jann Horn <jannh@google.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Manfred Spraul <manfred@colorfullife.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Serge E. Hallyn <serge@hallyn.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: arozansk@redhat.com
    Cc: axboe@kernel.dk
    Cc: kernel-hardening@lists.openwall.com
    Cc: linux-arch <linux-arch@vger.kernel.org>
    Link: http://lkml.kernel.org/r/1500921349-10803-2-git-send-email-keescook@chromium.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    df340524
rmwcc.h 1.57 KB