(ppc64le) ELF load command alignment not page-aligned

[Alejandro Álvarez Ayllón]

Hello all,

I am on the process of creating a new package, and making sure it builds
smoothly on Fedora.
However, even if it compiles successfully in ppc64le, the %check command
fails with this error:

/builddir/build/BUILDROOT/sourcextractor++-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++:
error while loading shared libraries: libSEMain.so.0.8: ELF load command
alignment not page-aligned

I am not doing anything esoteric here, just compiling C++ the usual way.

I would rather not just add an ExcludeArch if this can be fixed, but I have
not been able to find any information on why this error may be happening.

Any suggestions?

Regards,
Alejandro

P.S The build logs:
https://kojipkgs.fedoraproject.org//work/tasks/9174/41299174/build.log

[Dan Horák]

On Fri, 31 Jan 2020 16:32:15 +0100
Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:

>  Hello all,
>  
>  I am on the process of creating a new package, and making sure it
>  builds smoothly on Fedora.
>  However, even if it compiles successfully in ppc64le, the %check
>  command fails with this error:
>  
>  /builddir/build/BUILDROOT/sourcextractor+
>  +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while loading
>  shared libraries: libSEMain.so.0.8: ELF load command alignment not
>  page-aligned 
there could be an expectation of 4KB pages somewhere in the source
code, ppc64le runs with 64KB pages

>  I am not doing anything esoteric here, just compiling C++ the usual
>  way.
>  
>  I would rather not just add an ExcludeArch if this can be fixed, but
>  I have not been able to find any information on why this error may be
>  happening.
>  
>  Any suggestions? 
I would open an upstream bug as a start
 
>  Regards,
>  Alejandro
>  
>  P.S The build logs:
>  https://kojipkgs.fedoraproject.org//work/tasks/9174/41299174/build.log 
please link to the build task, not the log, it makes it more difficult
to get other details than necessary


		Dan

[Jakub Jelinek]

On Fri, Jan 31, 2020 at 04:32:15PM +0100, Alejandro Álvarez Ayllón wrote:
>  I am on the process of creating a new package, and making sure it
> builds
>  smoothly on Fedora.
>  However, even if it compiles successfully in ppc64le, the %check command
>  fails with this error:
>  
>  /builddir/build/BUILDROOT/sourcextractor++-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++:
>  error while loading shared libraries: libSEMain.so.0.8: ELF load command
>  alignment not page-aligned 
I guess you want to look at readelf -Wa libSEMain.so.0.8 and if some LOAD
segment is not 64KB aligned find out why it got there (broken linker script,
linker bug, whatever else).

	Jakub

[Dan Horák]

On Fri, 31 Jan 2020 16:43:21 +0100
Dan Horák <dan(a)danny.cz&gt; wrote:

>  On Fri, 31 Jan 2020 16:32:15 +0100
>  Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  
>  > Hello all,
>  > 
>  > I am on the process of creating a new package, and making sure it
>  > builds smoothly on Fedora.
>  > However, even if it compiles successfully in ppc64le, the %check
>  > command fails with this error:
>  > 
>  > /builddir/build/BUILDROOT/sourcextractor+
>  > +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while loading
>  > shared libraries: libSEMain.so.0.8: ELF load command alignment not
>  > page-aligned
>  
>  there could be an expectation of 4KB pages somewhere in the source
>  code, ppc64le runs with 64KB pages 
I have reproduced this in F-30, but the question is whether this is a
new thing with newer sources or did it always happen?


		Dan

[Alejandro Álvarez Ayllón]

El vie., 31 ene. 2020 17:59, Dan Horák <dan(a)danny.cz&gt; escribió:

>  On Fri, 31 Jan 2020 16:43:21 +0100
>  Dan Horák <dan(a)danny.cz&gt; wrote:
>
>  > On Fri, 31 Jan 2020 16:32:15 +0100
>  > Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  >
>  > > Hello all,
>  > >
>  > > I am on the process of creating a new package, and making sure it
>  > > builds smoothly on Fedora.
>  > > However, even if it compiles successfully in ppc64le, the %check
>  > > command fails with this error:
>  > >
>  > > /builddir/build/BUILDROOT/sourcextractor+
>  > > +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while loading
>  > > shared libraries: libSEMain.so.0.8: ELF load command alignment not
>  > > page-aligned
>  >
>  > there could be an expectation of 4KB pages somewhere in the source
>  > code, ppc64le runs with 64KB pages
>
>  I have reproduced this in F-30, but the question is whether this is a
>  new thing with newer sources or did it always happen?
>  

It is the first time I compile this software in ppc64, and probably the
first time it has been. The problem is that I do not have access to a ppc
machine to reproduce the issue. I'll try next week with qemu perhaps.


>                  Dan
>  _______________________________________________
>  devel mailing list -- devel(a)lists.fedoraproject.org
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>

[Tom Hughes]

On 31/01/2020 17:08, Alejandro Álvarez Ayllón wrote:

>  It is the first time I compile this software in ppc64, and probably
> the 
>  first time it has been. The problem is that I do not have access to a 
>  ppc machine to reproduce the issue. I'll try next week with qemu perhaps. 
You can always use the test machine:

https://fedoraproject.org/wiki/Test_Machine_Resources_For_Package_Maintai...

Tom

-- 
Tom Hughes (tom(a)compton.nu)
http://compton.nu/

[Dan Horák]

On Fri, 31 Jan 2020 18:08:11 +0100
Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:

>  El vie., 31 ene. 2020 17:59, Dan Horák <dan(a)danny.cz&gt;
> escribió:
>  
>  > On Fri, 31 Jan 2020 16:43:21 +0100
>  > Dan Horák <dan(a)danny.cz&gt; wrote:
>  >
>  > > On Fri, 31 Jan 2020 16:32:15 +0100
>  > > Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  > >
>  > > > Hello all,
>  > > >
>  > > > I am on the process of creating a new package, and making sure
>  > > > it builds smoothly on Fedora.
>  > > > However, even if it compiles successfully in ppc64le, the %check
>  > > > command fails with this error:
>  > > >
>  > > > /builddir/build/BUILDROOT/sourcextractor+
>  > > > +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while
>  > > > loading shared libraries: libSEMain.so.0.8: ELF load command
>  > > > alignment not page-aligned
>  > >
>  > > there could be an expectation of 4KB pages somewhere in the source
>  > > code, ppc64le runs with 64KB pages
>  >
>  > I have reproduced this in F-30, but the question is whether this is
>  > a new thing with newer sources or did it always happen?
>  >
>  
>  
>  It is the first time I compile this software in ppc64, and probably
>  the first time it has been. The problem is that I do not have access
>  to a ppc machine to reproduce the issue. I'll try next week with qemu
>  perhaps. 
you can use one from
https://fedoraproject.org/wiki/Test_Machine_Resources_For_Package_Maintai...

I run the command Jakub suggested and yes, there is something wrong

  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg
Align
  LOAD           0x000000 0x0000000000000000 0x0000000000000000 0x0488bf 0x0488bf R E
0x1000
  LOAD           0x0494e0 0x000000000004d4e0 0x000000000004d4e0 0x002b30 0x002c58 RW 
0x1000

0x1000 isn't right, must be 0x10000


		Dan

[Dan Horák]

On Fri, 31 Jan 2020 18:08:11 +0100
Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:

>  El vie., 31 ene. 2020 17:59, Dan Horák <dan(a)danny.cz&gt;
> escribió:
>  
>  > On Fri, 31 Jan 2020 16:43:21 +0100
>  > Dan Horák <dan(a)danny.cz&gt; wrote:
>  >
>  > > On Fri, 31 Jan 2020 16:32:15 +0100
>  > > Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  > >
>  > > > Hello all,
>  > > >
>  > > > I am on the process of creating a new package, and making sure
>  > > > it builds smoothly on Fedora.
>  > > > However, even if it compiles successfully in ppc64le, the %check
>  > > > command fails with this error:
>  > > >
>  > > > /builddir/build/BUILDROOT/sourcextractor+
>  > > > +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while
>  > > > loading shared libraries: libSEMain.so.0.8: ELF load command
>  > > > alignment not page-aligned
>  > >
>  > > there could be an expectation of 4KB pages somewhere in the source
>  > > code, ppc64le runs with 64KB pages
>  >
>  > I have reproduced this in F-30, but the question is whether this is
>  > a new thing with newer sources or did it always happen?
>  >
>  
>  
>  It is the first time I compile this software in ppc64, and probably
>  the first time it has been. The problem is that I do not have access
>  to a ppc machine to reproduce the issue. I'll try next week with qemu
>  perhaps. 
in SourceXtractorPlusPlus-0.8/build/CMakeCache.txt

//Flags used by the linker during the creation of modules.
CMAKE_MODULE_LINKER_FLAGS:STRING=-Wl,-z,relro -Wl,--as-needed
-Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
-Wl,--enable-new-dtags -Wl,--as-needed -Wl,--no-undefined  -Wl,-z,max-
page-size=0x1000

fiddling with page-size isn't good idea


		Dan

[Dan Horák]

On Fri, 31 Jan 2020 18:14:55 +0100
Dan Horák <dan(a)danny.cz&gt; wrote:

>  On Fri, 31 Jan 2020 18:08:11 +0100
>  Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  
>  > El vie., 31 ene. 2020 17:59, Dan Horák <dan(a)danny.cz&gt; escribió:
>  > 
>  > > On Fri, 31 Jan 2020 16:43:21 +0100
>  > > Dan Horák <dan(a)danny.cz&gt; wrote:
>  > >
>  > > > On Fri, 31 Jan 2020 16:32:15 +0100
>  > > > Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  > > >
>  > > > > Hello all,
>  > > > >
>  > > > > I am on the process of creating a new package, and making sure
>  > > > > it builds smoothly on Fedora.
>  > > > > However, even if it compiles successfully in ppc64le, the
>  > > > > %check command fails with this error:
>  > > > >
>  > > > > /builddir/build/BUILDROOT/sourcextractor+
>  > > > > +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while
>  > > > > loading shared libraries: libSEMain.so.0.8: ELF load command
>  > > > > alignment not page-aligned
>  > > >
>  > > > there could be an expectation of 4KB pages somewhere in the
>  > > > source code, ppc64le runs with 64KB pages
>  > >
>  > > I have reproduced this in F-30, but the question is whether this
>  > > is a new thing with newer sources or did it always happen?
>  > >
>  > 
>  > 
>  > It is the first time I compile this software in ppc64, and probably
>  > the first time it has been. The problem is that I do not have access
>  > to a ppc machine to reproduce the issue. I'll try next week with
>  > qemu perhaps.
>  
>  in SourceXtractorPlusPlus-0.8/build/CMakeCache.txt
>  
>  //Flags used by the linker during the creation of modules.
>  CMAKE_MODULE_LINKER_FLAGS:STRING=-Wl,-z,relro -Wl,--as-needed
>  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
>  -Wl,--enable-new-dtags -Wl,--as-needed -Wl,--no-undefined  -Wl,-z,max-
>  page-size=0x1000
>  
>  fiddling with page-size isn't good idea 
and the problem is
in /usr/lib64/cmake/ElementsProject/ElementsBuildFlags.cmake
which is provided by elements-devel


		Dan

[Alejandro Álvarez Ayllón]

El vie., 31 ene. 2020 18:21, Dan Horák <dan(a)danny.cz&gt; escribió:

>  On Fri, 31 Jan 2020 18:14:55 +0100
>  Dan Horák <dan(a)danny.cz&gt; wrote:
>
>  > On Fri, 31 Jan 2020 18:08:11 +0100
>  > Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  >
>  > > El vie., 31 ene. 2020 17:59, Dan Horák <dan(a)danny.cz&gt; escribió:
>  > >
>  > > > On Fri, 31 Jan 2020 16:43:21 +0100
>  > > > Dan Horák <dan(a)danny.cz&gt; wrote:
>  > > >
>  > > > > On Fri, 31 Jan 2020 16:32:15 +0100
>  > > > > Alejandro Álvarez Ayllón <aalvarez(a)fedoraproject.org&gt; wrote:
>  > > > >
>  > > > > > Hello all,
>  > > > > >
>  > > > > > I am on the process of creating a new package, and making sure
>  > > > > > it builds smoothly on Fedora.
>  > > > > > However, even if it compiles successfully in ppc64le, the
>  > > > > > %check command fails with this error:
>  > > > > >
>  > > > > > /builddir/build/BUILDROOT/sourcextractor+
>  > > > > > +-0.8-1.fc31.ppc64le//usr/bin/sourcextractor++: error while
>  > > > > > loading shared libraries: libSEMain.so.0.8: ELF load command
>  > > > > > alignment not page-aligned
>  > > > >
>  > > > > there could be an expectation of 4KB pages somewhere in the
>  > > > > source code, ppc64le runs with 64KB pages
>  > > >
>  > > > I have reproduced this in F-30, but the question is whether this
>  > > > is a new thing with newer sources or did it always happen?
>  > > >
>  > >
>  > >
>  > > It is the first time I compile this software in ppc64, and probably
>  > > the first time it has been. The problem is that I do not have access
>  > > to a ppc machine to reproduce the issue. I'll try next week with
>  > > qemu perhaps.
>  >
>  > in SourceXtractorPlusPlus-0.8/build/CMakeCache.txt
>  >
>  > //Flags used by the linker during the creation of modules.
>  > CMAKE_MODULE_LINKER_FLAGS:STRING=-Wl,-z,relro -Wl,--as-needed
>  > -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
>  > -Wl,--enable-new-dtags -Wl,--as-needed -Wl,--no-undefined  -Wl,-z,max-
>  > page-size=0x1000
>  >
>  > fiddling with page-size isn't good idea
>
>  and the problem is
>  in /usr/lib64/cmake/ElementsProject/ElementsBuildFlags.cmake
>  which is provided by elements-devel
>  
Ouch, I didn't realize it insists on setting flags it should not. I'll
patch and report to upstream.

Thanks a lot for the help!

Regards,
Alejandro


>                  Dan
>  _______________________________________________
>  devel mailing list -- devel(a)lists.fedoraproject.org
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>