i386/75898: Exception and reboot: Loader and kernel use SSE2 instructions before they get enabled

[Hiroo Ono]

The following reply was made to PR i386/75898; it has been noted by GNATS.

From: Hiroo Ono <hiroo at oikumene.gcd.org>
To: bug-followup at FreeBSD.org, obrien at FreeBSD.org
Cc: freebsd at chillt.de
Subject: Re: i386/75898: Exception and reboot: Loader and kernel use SSE2 instructions before they get enabled
Date: Thu, 09 Jun 2005 23:10:49 +0900

 Hello,
 
 > bsd.cpu.mk as of version 1.42 on 6.0-CURRENT and 1.40.2.1 on
 > 5.3-STABLE recognizes the setting CPUTYPE=pentium-m in
 > /etc/make.conf, which enables code generation and optimization for
 > the Pentium M family. One of the features enabled by this switch is
 > SSE2.
 
 > One way of fixing this would be to specifically disable SSE and SSE2
 > support in the Makefiles of those parts of the system that run
 > before the OSFXSR bit is set
 
 Mr.Obrien committed the fix in
 src/sys/boot/i386/Makefile.inc	rev.1.10 (HEAD) and 1.9.2.1 (RELENG_5),
 src/sys/boot/ficl/Makefile	rev.1.41 (HEAD) (not MFC'ed though).
 This seems to have fixed the problem in 6-CURRENT. The problem
 described in PR/ still remains.
 
 The PR i386/81111 (/boot/loader causes reboot due to CFLAGS+= -msse3)
 may relate to this PR.
 Also, i386/81694 may be related.
 
 The latter is not MFC'ed and thus RELENG_5 is still affected (I ran
 into this problem with 5.4-RELEASE-p1). Would you please MFC it?