From owner-svn-src-all@freebsd.org Wed Feb 3 01:50:28 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9881DA99CC1; Wed, 3 Feb 2016 01:50:28 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::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 52A17260; Wed, 3 Feb 2016 01:50:28 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u131oRkW048935; Wed, 3 Feb 2016 01:50:27 GMT (envelope-from jhibbits@FreeBSD.org) Received: (from jhibbits@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u131oR3C048933; Wed, 3 Feb 2016 01:50:27 GMT (envelope-from jhibbits@FreeBSD.org) Message-Id: <201602030150.u131oR3C048933@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhibbits set sender to jhibbits@FreeBSD.org using -f From: Justin Hibbits Date: Wed, 3 Feb 2016 01:50:27 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r295186 - head/sys/powerpc/powerpc X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Feb 2016 01:50:28 -0000 Author: jhibbits Date: Wed Feb 3 01:50:27 2016 New Revision: 295186 URL: https://svnweb.freebsd.org/changeset/base/295186 Log: Align signal stack pointer to 16 bytes. The stack must be aligned to 16 bytes at all times. Clang 3.8 is especially adamant about this, and causes strange behavior and segmentation faults if it is not the case. PR: kern/206810 Modified: head/sys/powerpc/powerpc/exec_machdep.c head/sys/powerpc/powerpc/sigcode32.S Modified: head/sys/powerpc/powerpc/exec_machdep.c ============================================================================== --- head/sys/powerpc/powerpc/exec_machdep.c Wed Feb 3 01:49:02 2016 (r295185) +++ head/sys/powerpc/powerpc/exec_machdep.c Wed Feb 3 01:50:27 2016 (r295186) @@ -219,10 +219,10 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { - usfp = (void *)((uintptr_t)td->td_sigstk.ss_sp + - td->td_sigstk.ss_size - rndfsize); + usfp = (void *)(((uintptr_t)td->td_sigstk.ss_sp + + td->td_sigstk.ss_size - rndfsize) & ~0xFul); } else { - usfp = (void *)(tf->fixreg[1] - rndfsize); + usfp = (void *)((tf->fixreg[1] - rndfsize) & ~0xFul); } /* Modified: head/sys/powerpc/powerpc/sigcode32.S ============================================================================== --- head/sys/powerpc/powerpc/sigcode32.S Wed Feb 3 01:49:02 2016 (r295185) +++ head/sys/powerpc/powerpc/sigcode32.S Wed Feb 3 01:50:27 2016 (r295186) @@ -45,9 +45,9 @@ */ .globl CNAME(sigcode32),CNAME(szsigcode32) CNAME(sigcode32): - addi 1,1,-20 /* reserved space for callee */ + addi 1,1,-32 /* reserved space for callee */ blrl - addi 3,1,20+SF_UC /* restore sp, and get &frame->sf_uc */ + addi 3,1,32+SF_UC /* restore sp, and get &frame->sf_uc */ li 0,SYS_sigreturn sc /* sigreturn(scp) */ li 0,SYS_exit