Date: Tue, 19 Aug 2008 21:45:35 +0400 From: Chagin Dmitry <dchagin@freebsd.org> To: freebsd-emulation@freebsd.org Subject: Re: x86_64 linuxulator patches Message-ID: <20080819174535.GA16788@dchagin.dialup.corbina.ru> In-Reply-To: <20080818100541.20073jcxqbtyci80@webmail.leidinger.net> References: <20080810072013.GA15196@dchagin.dialup.corbina.ru> <20080810115406.GR97161@deviant.kiev.zoral.com.ua> <20080810120424.GA15768@dchagin.dialup.corbina.ru> <20080810122124.GS97161@deviant.kiev.zoral.com.ua> <20080817181757.GA2940@dchagin.dialup.corbina.ru> <20080818100541.20073jcxqbtyci80@webmail.leidinger.net>
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On Mon, Aug 18, 2008 at 10:05:41AM +0200, Alexander Leidinger wrote: > Quoting "Chagin Dmitry" <dchagin@freebsd.org> (from Sun, 17 Aug 2008 > 22:17:57 +0400): > > >On Sun, Aug 10, 2008 at 03:21:24PM +0300, Kostik Belousov wrote: > >>On Sun, Aug 10, 2008 at 04:04:24PM +0400, Chagin Dmitry wrote: > >>> On Sun, Aug 10, 2008 at 02:54:06PM +0300, Kostik Belousov wrote: > >>> > On Sun, Aug 10, 2008 at 11:20:13AM +0400, Chagin Dmitry wrote: > >>> > > Hi, as promised, I place x86_64 linuxulator patches. > >>> > > > >>> > > here the basic patch: > >>> > > http://78.107.232.239/linuxulator64-current.patch > >>> > > > >>> > > here recvmsg && sendmsg patch (not tested with really applications): > >>> > > http://78.107.232.239/send-recv-msg.patch > >>> > > > >>> > > here master repository: > >>> > > git://78.107.232.239/linuxulator > >>> > > > >>> > > and ports used for testing (and only for testing): > >>> > > git://78.107.232.239/linux_base-f8 > >>> > > git://78.107.232.239/linux_devel-f8 > >>> > > git://78.107.232.239/linux_kdump-1.6 > >>> > > > >>> > > by default on amd64 builds i386 linuxulator, for build x86_64 use > >>> > > cd sys/modules/linux > >>> > > make -D COMPAT_LINUX64 > >>> > > > >>> > > for correct recognition of what linuxulator version is used > >>> > > added new sysctl compat.linux.platform > >>> > > for example use in ports Makefile's: > >>> > > > >>> > > LINUX_PLATFORM!= /sbin/sysctl -n compat.linux.platform > >>2>/dev/null > >>> > > > >>> > > .if ${LINUX_PLATFORM}x == "x" > >>> > > IGNORE= linuxulator is not (kld)loaded > >>> > > .elif ${LINUX_PLATFORM} == "i386" > >>> > > LINUX_RPM_ARCH= i386 > >>> > > .elif ${LINUX_PLATFORM} == "x86_64" > >>> > > LINUX_RPM_ARCH= x86_64 > >>> > > SFX= 64 > >>> > > .else > >>> > > IGNORE= ${LINUX_PLATFORM} is not supported > >>> > > .endif > >>> > > > >>> > > I shal glad to remarks, proposals and results of testing. > >>> > > thnx > >>> > > >>> > Reading your email, I got an impression that i386/linux and > >>x86_64/linux > >>> > ABI emulators are mutually exclusive. Is this right ? I think it would > >>> > be most useful to be able to have them both in one kernel. > >>> > >>> yes, it so. if there are ports working only on i386 it's necessary > >>> to do it. I don't know such ports :( > >> > >>Whether there is a _port_ that has no amd64 counterpart for i386 one is > >>irrelevant there. The Linux ABI emulation is supposed to work not only > >>with > >>a software installed from port, but with most binaries. > >> > >>If emulating both ia32 and x86_64 simultaneously is technically feasible > >>(and I believe it is), then both should be available. i386->amd64 is > >>not the replacement step, this is an backward-compatible upgrade. > > > >Something few the interested participants of discussion :) > >problem in that I am not familiar with a ports infrastructure... > > > >in my opinion the best decision for amd64 looks so. > >we use two modules. linux.ko for x86_64 and linux32.ko for ia32, > >option COMPAT_LINUX for x86_64 and COMPAT_LINUX32 for ia32. > >and two linux_base directories: /compat/linux for x86_64 > >and /compat/linux32 for ia32. > > > >there are other opinions? > > I propose: > - /compat/linux64 for 64bit stuff > - /compat/linux32 a symlink to /compat/linux > - /compat/linux for 32bit stuff (we can think about having) > > Reasons: > - existing installations don't get fucked up with a partial update > (very big point!) > - we don't have to special case amd64-linux32 for LINUXBASE, we > just have to distinguish 32 and 64 bit (maybe with switches > USE_LINUX and USE_LINUX64, we have to have separate 64bit > ports anyway, when we want to be able to install in parallel) > Thanks Alexander, Adrian, Roman! I have understood. -- Have fun! chd
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