Re:32bit on 64bit in xenomai 2.6.0

Re:32bit on 64bit in xenomai 2.6.0

[Manikanta Mylavarapu]

Dear all,

I am trying to run 32bit applications on 64bit xenomai. I installed xenomai
2.6.0 on fedora 13 x86_64. I installed all 32bit GCC lib & c librarys
(glibc-devel.i686 & going.i686).

I made one hello world sample (non-rt) app, it is giving error while running
 "-bash: ./a.out: cannot execute binary file" but the same a.out is running
fine on "plain fedora13 x86_64".

My question is on xenomai 2.x can we run 32bit rt & non-rt app on 64bit
kernel? Please help me.

Re: 32bit on 64bit in xenomai 2.6.0

[Jan Kiszka]

On 07.11.18 07:15, Manikanta Mylavarapu via Xenomai wrote:
> Dear all,
> 
> I am trying to run 32bit applications on 64bit xenomai. I installed xenomai
> 2.6.0 on fedora 13 x86_64. I installed all 32bit GCC lib & c librarys
> (glibc-devel.i686 & going.i686).
> 
> I made one hello world sample (non-rt) app, it is giving error while running
>  "-bash: ./a.out: cannot execute binary file" but the same a.out is running
> fine on "plain fedora13 x86_64".
> 
> My question is on xenomai 2.x can we run 32bit rt & non-rt app on 64bit
> kernel? Please help me.
> 

Xenomai 2 is EOL, no longer supported. And compat support (32-on-64 bit) has
only be added to Xenomai 3. So you should migrate to the current stable version.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux

Re: 32bit on 64bit in xenomai 2.6.0

[Manikanta Mylavarapu]

Thank you Jan.

For my project requirement I am working with xenomai 2.6.0 on fedora 13.

My doubt is at least sample app compiled as a 32bit exe on 64bit kernel
should work. But it is not running on xenomai patched 64bit os,why?

On Wed, Nov 7, 2018, 12:13 PM Jan Kiszka <jan.kiszka@siemens.com> wrote:

> On 07.11.18 07:15, Manikanta Mylavarapu via Xenomai wrote:
> > Dear all,
> >
> > I am trying to run 32bit applications on 64bit xenomai. I installed
> xenomai
> > 2.6.0 on fedora 13 x86_64. I installed all 32bit GCC lib & c librarys
> > (glibc-devel.i686 & going.i686).
> >
> > I made one hello world sample (non-rt) app, it is giving error while
> running
> >  "-bash: ./a.out: cannot execute binary file" but the same a.out is
> running
> > fine on "plain fedora13 x86_64".
> >
> > My question is on xenomai 2.x can we run 32bit rt & non-rt app on 64bit
> > kernel? Please help me.
> >
>
> Xenomai 2 is EOL, no longer supported. And compat support (32-on-64 bit)
> has
> only be added to Xenomai 3. So you should migrate to the current stable
> version.
>
> Jan
>
> --
> Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> Corporate Competence Center Embedded Linux
>

Re: 32bit on 64bit in xenomai 2.6.0

[Lennart Sorensen]

On Wed, Nov 07, 2018 at 12:36:20PM +0530, Manikanta Mylavarapu via Xenomai wrote:
> Thank you Jan.
> 
> For my project requirement I am working with xenomai 2.6.0 on fedora 13.
> 
> My doubt is at least sample app compiled as a 32bit exe on 64bit kernel
> should work. But it is not running on xenomai patched 64bit os,why?

Is 32 bit support even enabled in the kernel config?
CONFIG_IA32_EMULATION under executable file formats is rather required.

And which kernel are you using, given xenomai 2.6.0 had ipipe patches for
2.6.35 and a few others, but not 2.6.32 that I believe fedora 13 used.

Of course who remembers what things were like 8 years ago.

Other than configuring the kernel wrong I see no reason 32 bit linux
applications shouldn't work on a 64 bit linux kernel, but xenomai apps
have to be 64 bit (unless you move to xenomai 3.x).

-- 
Len Sorensen