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Re: [Qemu-devel] [PULL 00/24] Linux-user updates
From: |
Joakim Tjernlund |
Subject: |
Re: [Qemu-devel] [PULL 00/24] Linux-user updates |
Date: |
Mon, 18 Aug 2014 17:15:50 +0200 |
Peter Maydell <address@hidden> wrote on 2014/08/18 15:04:50:
>
> On 18 August 2014 13:59, Joakim Tjernlund
<address@hidden> wrote:
> > Peter Maydell <address@hidden> wrote on 2014/08/18 14:45:49:
> >>
> >> On 18 August 2014 13:38, Joakim Tjernlund
> > <address@hidden> wrote:
> >> > Peter Maydell <address@hidden> wrote on 2014/08/18
12:58:48:
> >> >> Well, binfmt-misc works fine for me as it is and presumably
> >> >> for most people or we'd have had more complaints. So
> >> >> breaking all those existing working setups is really something
> >> >> we should avoid as much as possible.
> >> >
> >> > How do you use it? With LXC booting a VM with traditional init?
> >>
> >> No. Just a straightforward chroot environment with a
> >> statically linked qemu in it, and a binfmt_misc config like:
> >>
> >> e104462:trusty:qemu$ cat /proc/sys/fs/binfmt_misc/qemu-arm
> >> enabled
> >> interpreter /usr/bin/qemu-arm-static
> >
> > Where does -static come from? Is that the standard name a static
qemu-user
> > build gets?
>
> No. It's just what Debian and Ubuntu call their statically
> linked binaries.
>
> >> flags: OC
> >> offset 0
> >> magic 7f454c4601010100000000000000000002002800
> >> mask ffffffffffffff00fffffffffffffffffeffffff
> >>
> >> This works fine for the things I try to run in the chroot
> >> (mostly test programs, also bash and basic command
> >> line utilities).
> >
> > Using bash as a login shell one need one of(from bash man page):
> > A login shell is one whose first character of argument zero is a -,
or
> > one started with the --login option.
>
> Who said anything about login shells? I just chroot into the
> thing and run a shell.
Yes, that was a bit short. It was only meant as an example of what could
break not using
P flag as bash behaves differently if invoked as login shell which could
lead to breakage
further down the line.
Jocke
- [Qemu-devel] [PULL 20/24] linux-user: Minimum Sig Handler Stack Size for PPC64 ELF V2, (continued)
- [Qemu-devel] [PULL 20/24] linux-user: Minimum Sig Handler Stack Size for PPC64 ELF V2, riku . voipio, 2014/08/15
- [Qemu-devel] [PULL 21/24] linux-user: clock_nanosleep errno Handling on PPC, riku . voipio, 2014/08/15
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Peter Maydell, 2014/08/15
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Riku Voipio, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Joakim Tjernlund, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Peter Maydell, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Joakim Tjernlund, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Peter Maydell, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Joakim Tjernlund, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Peter Maydell, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates,
Joakim Tjernlund <=
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Riku Voipio, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Joakim Tjernlund, 2014/08/18
- Re: [Qemu-devel] [PULL 00/24] Linux-user updates, Laurent Vivier, 2014/08/18