Re: [uml-devel] SYSCALL, ptrace and syscall restart breakages (Re: [RFC] weird crap with vdso on uml/i386)

2011-08-24 Thread Richard Weinberger
Am 23.08.2011 19:07, schrieb Al Viro: On Tue, Aug 23, 2011 at 06:58:18PM +0200, Richard Weinberger wrote: What about this hack/solution? While booting UML can check whether the host's vDSO contains a SYSCALL instruction. If so, UML will not make the host's vDSO available to it's processes...

Re: [uml-devel] [PATCH] UserModeLinux-HOWTO.txt: remove ^H characters

2011-08-24 Thread Davidlohr Bueso
On Fri, 2011-08-12 at 21:06 +0200, Jonathan Neuschäfer wrote: > On Fri, Aug 12, 2011 at 10:19:28AM -0700, Randy Dunlap wrote: > > On Fri, 12 Aug 2011 02:28:23 +0200 Jonathan Neuschäfer wrote: > > > > > If you can't read this patch, please run: > > > > > > sed -i -e "s/[^\o10]\o10//g" \ > > >

Re: [uml-devel] [PATCH] UserModeLinux-HOWTO.txt: remove ^H characters

2011-08-24 Thread Jonathan Neuschäfer
On Wed, Aug 24, 2011 at 06:35:43PM -0300, Davidlohr Bueso wrote: > Glad I noticed this patch in time, just today I was doing the same. FYI > I'm in the process of updating/splitting the document. Nice! Regards, Jonathan Neuschäfer -

Re: [uml-devel] SYSCALL, ptrace and syscall restart breakages (Re: [RFC] weird crap with vdso on uml/i386)

2011-08-24 Thread H. Peter Anvin
On 08/23/2011 02:10 PM, Borislav Petkov wrote: > On Tue, Aug 23, 2011 at 05:06:03PM -0400, H. Peter Anvin wrote: >> On 08/23/2011 01:56 PM, Borislav Petkov wrote: >>> >>> But no, I don't think the difference has disappeared - to the contrary, >>> AFAICT, the intention is for SYSCALL to be the faste

[uml-devel] [PATCH] x86, asm: Document some of the syscall asm glue

2011-08-24 Thread Borislav Petkov
On Tue, Aug 23, 2011 at 06:33:17PM +0100, Al Viro wrote: > * asm glue is subtle, evil and doesn't have anywhere near enough > documentation ;-/ I took the liberty to document some of your asm glue analysis in an attempt to make the code a bit more understandable. How about the following: --