From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 93-97-173-237.zone5.bethere.co.uk ([93.97.173.237] helo=tim.rpsys.net) by linuxtogo.org with esmtp (Exim 4.72) (envelope-from ) id 1TJN8r-0005w8-JI for openembedded-core@lists.openembedded.org; Wed, 03 Oct 2012 13:29:29 +0200 Received: from localhost (localhost [127.0.0.1]) by tim.rpsys.net (8.13.6/8.13.8) with ESMTP id q93BGSBT026801; Wed, 3 Oct 2012 12:16:28 +0100 Received: from tim.rpsys.net ([127.0.0.1]) by localhost (tim.rpsys.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 25642-07; Wed, 3 Oct 2012 12:16:24 +0100 (BST) Received: from [192.168.3.10] ([192.168.3.10]) (authenticated bits=0) by tim.rpsys.net (8.13.6/8.13.8) with ESMTP id q93BGJXL026795 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NO); Wed, 3 Oct 2012 12:16:20 +0100 Message-ID: <1349262982.18301.26.camel@ted> From: Richard Purdie To: Laurentiu Palcu Date: Wed, 03 Oct 2012 12:16:22 +0100 In-Reply-To: <1349261234-22493-2-git-send-email-laurentiu.palcu@intel.com> References: <1349261234-22493-1-git-send-email-laurentiu.palcu@intel.com> <1349261234-22493-2-git-send-email-laurentiu.palcu@intel.com> X-Mailer: Evolution 3.2.3-0ubuntu6 Mime-Version: 1.0 X-Virus-Scanned: amavisd-new at rpsys.net Cc: openembedded-core@lists.openembedded.org Subject: Re: [PATCH v2 1/1] qemu: add wrapper for qemu-mips binary X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Oct 2012 11:29:29 -0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit On Wed, 2012-10-03 at 13:47 +0300, Laurentiu Palcu wrote: > qemu-mips user emulation binary segfaults when running any kind of > binary. This is due to a MMU access fault in the virtual CPU. This > problem has been introduced in qemu when 4GB of vmem were reserved for > 32-on-64 bit. > > This workaround will need to be reverted once the proper fix is found. > > [YOCTO #3143] > > Signed-off-by: Laurentiu Palcu > --- > meta/recipes-devtools/qemu/qemu_1.2.0.bb | 16 +++++++++++++++- > 1 file changed, 15 insertions(+), 1 deletion(-) > > diff --git a/meta/recipes-devtools/qemu/qemu_1.2.0.bb b/meta/recipes-devtools/qemu/qemu_1.2.0.bb > index 191ee48..fa53e57 100644 > --- a/meta/recipes-devtools/qemu/qemu_1.2.0.bb > +++ b/meta/recipes-devtools/qemu/qemu_1.2.0.bb > @@ -17,7 +17,7 @@ SRC_URI = "\ > SRC_URI[md5sum] = "78eb1e984f4532aa9f2bdd3c127b5b61" > SRC_URI[sha256sum] = "c8b84420d9f4869397f84cad2dabd9a475b7723d619a924a873740353e9df936" > > -PR = "r2" > +PR = "r3" > > SRC_URI_append_virtclass-nativesdk = "\ > file://relocatable_sdk.patch \ > @@ -29,6 +29,20 @@ do_configure_prepend_virtclass-nativesdk() { > sed -i 's/-lX11//g' Makefile.target > fi > } > + > +# The following fragment will create a wrapper for qemu-mips user emulation > +# binary in order to work around a segmentation fault issue. Basically, by > +# default, the reserved virtual address space for 32-on-64 bit is set to 4GB. > +# This will trigger a MMU access fault in the virtual CPU. With this change, > +# the qemu-mips works fine. > +# IMPORTANT: This piece needs to be removed once the root cause is fixed! > +inherit utils You don't need this inherit since utils is inherited as part of base.bbclass. Otherwise it looks good. Cheers, Richard > +do_install_append() { > + create_wrapper ${D}/${bindir}/qemu-mips \ > + QEMU_RESERVED_VA=0x0 > +} > +# END of qemu-mips workaround > + > do_configure_prepend_virtclass-native() { > # Undo the -lX11 added by linker-flags.patch, don't assume that host has libX11 installed > sed -i 's/-lX11//g' Makefile.target