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Re: [Qemu-devel] qemu & arm eabi (armel)
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] qemu & arm eabi (armel) |
Date: |
Wed, 27 Sep 2006 19:38:57 +0100 |
User-agent: |
KMail/1.9.4 |
On Wednesday 27 September 2006 19:27, K. Richard Pixley wrote:
> Paul Brook wrote:
> >> Do you know why 2.6.16 would be required? (I'll see if I can't
> >> find/build a 2.6.16 system on which to try it today.)
> >
> > Because arm-linux didn't get EABI support until 2.6.16 (though our
> > toolchains may accept 2.6.14). glibc has santity checks stop applications
> > even trying to run on kernels that are too old.
> >
> > As I mentioned qemu lie about the kernel version. See -r
> > and --enable-uname-release.
>
> I'm confused. My host kernel, (hosted on an x86 ubuntu box), is:
>
> address@hidden> uname -r
> 2.6.12-10-686-smp
>
> And my understanding is that there is no kernel when running qemu-user
> because qemu is emulating the kernel calls.
>
> What am I missing? Or where does the kernel version come into play?
glibc startup code checks the kernel version. If the reported version is
earlier than the version it was compiled for it will terminate.
When building glibc you specify a kernel version, and glibc will leave out
backwards compatibility code for older kernels. The runtime check is a sanity
check. It's generally better for the application to die immediately than fail
subtly later on.
Of course when using qemu the syscalls thatqemu emulates tend to be more
important than the host kernel version. By default qemu will report the same
version as the host kernel. However you can tell it to report a different
version.
Paul
- [Qemu-devel] qemu & arm eabi (armel), K. Richard Pixley, 2006/09/26
- Re: [Qemu-devel] qemu & arm eabi (armel), Rafael EspĂndola, 2006/09/26
- Re: [Qemu-devel] qemu & arm eabi (armel), Paul Brook, 2006/09/26
- Re: [Qemu-devel] qemu & arm eabi (armel), K. Richard Pixley, 2006/09/26
- Re: [Qemu-devel] qemu & arm eabi (armel), Paul Brook, 2006/09/26
- Re: [Qemu-devel] qemu & arm eabi (armel), K. Richard Pixley, 2006/09/27
- Re: [Qemu-devel] qemu & arm eabi (armel), Paul Brook, 2006/09/27
- Re: [Qemu-devel] qemu & arm eabi (armel), K. Richard Pixley, 2006/09/27
- Re: [Qemu-devel] qemu & arm eabi (armel),
Paul Brook <=
- Re[2]: [Qemu-devel] qemu & arm eabi (armel), Paul Sokolovsky, 2006/09/27
- Re: [Qemu-devel] qemu & arm eabi (armel), Paul Brook, 2006/09/27