• Denys Vlasenko's avatar
    x86/asm/entry/32: Replace RESTORE_RSI_RDI with open-coded 32-bit reads · c73e36b7
    Denys Vlasenko authored
    This doesn't change much, but uses shorter 32-bit insns:
    
            -48 8b 74 24 68         mov    0x68(%rsp),%rsi
            -48 8b 7c 24 70         mov    0x70(%rsp),%rdi
            -48 8b 54 24 60         mov    0x60(%rsp),%rdx
            +8b 54 24 60            mov    0x60(%rsp),%edx
            +8b 74 24 68            mov    0x68(%rsp),%esi
            +8b 7c 24 70            mov    0x70(%rsp),%edi
    
    and does the loads in pt_regs order.
    
    Since these are the only uses of RESTORE_RSI_RDI[_RDX], drop
    these macros.
    Signed-off-by: default avatarDenys Vlasenko <dvlasenk@redhat.com>
    Cc: Alexei Starovoitov <ast@plumgrid.com>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Will Drewry <wad@chromium.org>
    Link: http://lkml.kernel.org/r/1435954742-2545-1-git-send-email-dvlasenk@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    c73e36b7
calling.h 6.32 KB