Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752993AbbBYABV (ORCPT ); Tue, 24 Feb 2015 19:01:21 -0500 Received: from mx1.redhat.com ([209.132.183.28]:45298 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752896AbbBYABT (ORCPT ); Tue, 24 Feb 2015 19:01:19 -0500 From: Denys Vlasenko To: Andy Lutomirski Cc: Denys Vlasenko , Linus Torvalds , Steven Rostedt , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Oleg Nesterov , Frederic Weisbecker , Alexei Starovoitov , Will Drewry , Kees Cook , x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/7] x86: entry.S: use smaller insns Date: Wed, 25 Feb 2015 01:00:15 +0100 Message-Id: <1424822419-10267-3-git-send-email-dvlasenk@redhat.com> In-Reply-To: <1424822419-10267-1-git-send-email-dvlasenk@redhat.com> References: <1424822419-10267-1-git-send-email-dvlasenk@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1710 Lines: 52 The $AUDIT_ARCH_X86_64 parameter to syscall_trace_enter_phase1/2 is a 32-bit constant, loading it with 32-bit MOV produces 5-byte insn instead of 10-byte one. Signed-off-by: Denys Vlasenko CC: Linus Torvalds CC: Steven Rostedt CC: Ingo Molnar CC: Borislav Petkov CC: "H. Peter Anvin" CC: Andy Lutomirski CC: Oleg Nesterov CC: Frederic Weisbecker CC: Alexei Starovoitov CC: Will Drewry CC: Kees Cook CC: x86@kernel.org CC: linux-kernel@vger.kernel.org --- arch/x86/kernel/entry_64.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index e5e0a55..779ae21 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -312,7 +312,7 @@ int_ret_from_sys_call_fixup: /* Do syscall tracing */ tracesys: movq %rsp, %rdi - movq $AUDIT_ARCH_X86_64, %rsi + movl $AUDIT_ARCH_X86_64, %esi call syscall_trace_enter_phase1 test %rax, %rax jnz tracesys_phase2 /* if needed, run the slow path */ @@ -323,7 +323,7 @@ tracesys_phase2: SAVE_EXTRA_REGS FIXUP_TOP_OF_STACK %rdi movq %rsp, %rdi - movq $AUDIT_ARCH_X86_64, %rsi + movl $AUDIT_ARCH_X86_64, %esi movq %rax,%rdx call syscall_trace_enter_phase2 -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/