From owner-svn-src-head@FreeBSD.ORG Mon Jun 8 17:39:26 2015 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 02F2518A; Mon, 8 Jun 2015 17:39:26 +0000 (UTC) (envelope-from dchagin@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CB4C11EE2; Mon, 8 Jun 2015 17:39:25 +0000 (UTC) (envelope-from dchagin@FreeBSD.org) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t58HdPV6039892; Mon, 8 Jun 2015 17:39:25 GMT (envelope-from dchagin@FreeBSD.org) Received: (from dchagin@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t58HdP8h039891; Mon, 8 Jun 2015 17:39:25 GMT (envelope-from dchagin@FreeBSD.org) Message-Id: <201506081739.t58HdP8h039891@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: dchagin set sender to dchagin@FreeBSD.org using -f From: Dmitry Chagin Date: Mon, 8 Jun 2015 17:39:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r284159 - head/sys/amd64/linux X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jun 2015 17:39:26 -0000 Author: dchagin Date: Mon Jun 8 17:39:25 2015 New Revision: 284159 URL: https://svnweb.freebsd.org/changeset/base/284159 Log: Futex is an aligned 32-bit integer. Use the proper instruction and operand when dereferencing futex pointer. Modified: head/sys/amd64/linux/linux_support.s Modified: head/sys/amd64/linux/linux_support.s ============================================================================== --- head/sys/amd64/linux/linux_support.s Mon Jun 8 16:24:43 2015 (r284158) +++ head/sys/amd64/linux/linux_support.s Mon Jun 8 17:39:25 2015 (r284159) @@ -45,9 +45,9 @@ ENTRY(futex_xchgl) movq $VM_MAXUSER_ADDRESS-4,%rax cmpq %rax,%rsi ja futex_fault - xchgq %rdi,(%rsi) - movq %rdi,(%rdx) - xorq %rax,%rax + xchgl %edi,(%rsi) + movl %edi,(%rdx) + xorl %eax,%eax movq %rax,PCB_ONFAULT(%r8) ret @@ -60,9 +60,9 @@ ENTRY(futex_addl) #ifdef SMP lock #endif - xaddq %rdi,(%rsi) - movq %rdi,(%rdx) - xorq %rax,%rax + xaddl %edi,(%rsi) + movl %edi,(%rdx) + xorl %eax,%eax movq %rax,PCB_ONFAULT(%r8) ret @@ -72,16 +72,16 @@ ENTRY(futex_orl) movq $VM_MAXUSER_ADDRESS-4,%rax cmpq %rax,%rsi ja futex_fault - movq (%rsi),%rax -1: movq %rax,%rcx - orq %rdi,%rcx + movl (%rsi),%eax +1: movl %eax,%ecx + orl %edi,%ecx #ifdef SMP lock #endif - cmpxchgq %rcx,(%rsi) + cmpxchgl %ecx,(%rsi) jnz 1b - movq %rax,(%rdx) - xorq %rax,%rax + movl %eax,(%rdx) + xorl %eax,%eax movq %rax,PCB_ONFAULT(%r8) ret @@ -91,16 +91,16 @@ ENTRY(futex_andl) movq $VM_MAXUSER_ADDRESS-4,%rax cmpq %rax,%rsi ja futex_fault - movq (%rsi),%rax -1: movq %rax,%rcx - andq %rdi,%rcx + movl (%rsi),%eax +1: movl %eax,%ecx + andl %edi,%ecx #ifdef SMP lock #endif - cmpxchgq %rcx,(%rsi) + cmpxchgl %ecx,(%rsi) jnz 1b - movq %rax,(%rdx) - xorq %rax,%rax + movl %eax,(%rdx) + xorl %eax,%eax movq %rax,PCB_ONFAULT(%r8) ret @@ -110,15 +110,15 @@ ENTRY(futex_xorl) movq $VM_MAXUSER_ADDRESS-4,%rax cmpq %rax,%rsi ja futex_fault - movq (%rsi),%rax -1: movq %rax,%rcx - xorq %rdi,%rcx + movl (%rsi),%eax +1: movl %eax,%ecx + xorl %edi,%ecx #ifdef SMP lock #endif - cmpxchgq %rcx,(%rsi) + cmpxchgl %ecx,(%rsi) jnz 1b - movq %rax,(%rdx) - xorq %rax,%rax + movl %eax,(%rdx) + xorl %eax,%eax movq %rax,PCB_ONFAULT(%r8) ret