From owner-svn-src-head@FreeBSD.ORG Sat Mar 29 14:17:05 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 6945E315; Sat, 29 Mar 2014 14:17:05 +0000 (UTC) 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 561586C8; Sat, 29 Mar 2014 14:17:05 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.8/8.14.8) with ESMTP id s2TEH5f6009589; Sat, 29 Mar 2014 14:17:05 GMT (envelope-from andrew@svn.freebsd.org) Received: (from andrew@localhost) by svn.freebsd.org (8.14.8/8.14.8/Submit) id s2TEH4R3009586; Sat, 29 Mar 2014 14:17:04 GMT (envelope-from andrew@svn.freebsd.org) Message-Id: <201403291417.s2TEH4R3009586@svn.freebsd.org> From: Andrew Turner Date: Sat, 29 Mar 2014 14:17:04 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r263913 - head/sys/arm/arm 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: 2.1.17 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: Sat, 29 Mar 2014 14:17:05 -0000 Author: andrew Date: Sat Mar 29 14:17:04 2014 New Revision: 263913 URL: http://svnweb.freebsd.org/changeset/base/263913 Log: Initialise fpscr to a sane value when we create the pcb. This sets NaNs to be the default NaN and for denormalised numbers to be flushed to zero. Modified: head/sys/arm/arm/machdep.c head/sys/arm/arm/vm_machdep.c Modified: head/sys/arm/arm/machdep.c ============================================================================== --- head/sys/arm/arm/machdep.c Sat Mar 29 11:56:33 2014 (r263912) +++ head/sys/arm/arm/machdep.c Sat Mar 29 14:17:04 2014 (r263913) @@ -101,6 +101,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include @@ -990,6 +991,7 @@ init_proc0(vm_offset_t kstack) (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; thread0.td_pcb->pcb_flags = 0; thread0.td_pcb->pcb_vfpcpu = -1; + thread0.td_pcb->pcb_vfpstate.fpscr = VFPSCR_DN | VFPSCR_FZ; thread0.td_frame = &proc0_tf; pcpup->pc_curpcb = thread0.td_pcb; } Modified: head/sys/arm/arm/vm_machdep.c ============================================================================== --- head/sys/arm/arm/vm_machdep.c Sat Mar 29 11:56:33 2014 (r263912) +++ head/sys/arm/arm/vm_machdep.c Sat Mar 29 14:17:04 2014 (r263913) @@ -74,6 +74,7 @@ __FBSDID("$FreeBSD$"); #include #include +#include /* * struct switchframe and trapframe must both be a multiple of 8 @@ -147,6 +148,7 @@ cpu_fork(register struct thread *td1, re pcb2->un_32.pcb32_sp = td2->td_kstack + USPACE_SVC_STACK_TOP - sizeof(*pcb2); pcb2->pcb_vfpcpu = -1; + pcb2->pcb_vfpstate.fpscr = VFPSCR_DN | VFPSCR_FZ; pmap_activate(td2); td2->td_frame = tf = (struct trapframe *)STACKALIGN( pcb2->un_32.pcb32_sp - sizeof(struct trapframe));