linux-user static build broken

linux-user static build broken

[Laurent Vivier]

Hi,

since we have switched to meson, the statically linked binaries of qemu
linux-user are broken:

cd $OBJ
$SRC/configure --static --target-list=m68k-linux-user
make
./qemu-m68k
Segmentation fault (core dumped)

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7bd6833 in __dcigettext ()
(gdb) bt
#0  0x00007ffff7bd6833 in __dcigettext ()
#1  0x00007ffff7bd5352 in __assert_fail ()
#2  0x00007ffff7c4d74c in _dl_relocate_static_pie ()
#3  0x00007ffff7bc713e in __libc_start_main ()
#4  0x00007ffff7a0029e in _start ()

If I build with --disable-pie it works again.

Any idea?

Thanks,
Laurent

Re: linux-user static build broken

[Peter Maydell]

On Tue, 25 Aug 2020 at 21:37, Laurent Vivier <laurent@vivier.eu> wrote:
>
> Hi,
>
> since we have switched to meson, the statically linked binaries of qemu
> linux-user are broken:
>
> cd $OBJ
> $SRC/configure --static --target-list=m68k-linux-user
> make
> ./qemu-m68k
> Segmentation fault (core dumped)

It can't be all static binaries, because part of my merge
tests is a config with
'../../configure' '--cc=ccache gcc' '--enable-debug' '--static'
'--disable-system' '--disable-gnutls'

and that works:
$ ./build/all-linux-static/qemu-m68k
qemu: no user program specified

So it must be something more specific, though I don't know what.

thanks
-- PMM

Re: linux-user static build broken

[Daniel P. Berrangé]

On Tue, Aug 25, 2020 at 10:36:13PM +0200, Laurent Vivier wrote:
> Hi,
> 
> since we have switched to meson, the statically linked binaries of qemu
> linux-user are broken:
> 
> cd $OBJ
> $SRC/configure --static --target-list=m68k-linux-user
> make
> ./qemu-m68k
> Segmentation fault (core dumped)
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7bd6833 in __dcigettext ()
> (gdb) bt
> #0  0x00007ffff7bd6833 in __dcigettext ()
> #1  0x00007ffff7bd5352 in __assert_fail ()
> #2  0x00007ffff7c4d74c in _dl_relocate_static_pie ()
> #3  0x00007ffff7bc713e in __libc_start_main ()
> #4  0x00007ffff7a0029e in _start ()
> 
> If I build with --disable-pie it works again.
> 
> Any idea?

I'd suggest checking the compiler args used with v5.1.0 vs git master
and see if any flags related to PIE or similar changed. I already found
one bug wrt PIE on Windows builds this way.

Regards,
Daniel
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Re: linux-user static build broken

[Laurent Vivier]

Le 26/08/2020 à 10:44, Daniel P. Berrangé a écrit :
> On Tue, Aug 25, 2020 at 10:36:13PM +0200, Laurent Vivier wrote:
>> Hi,
>>
>> since we have switched to meson, the statically linked binaries of qemu
>> linux-user are broken:
>>
>> cd $OBJ
>> $SRC/configure --static --target-list=m68k-linux-user
>> make
>> ./qemu-m68k
>> Segmentation fault (core dumped)
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007ffff7bd6833 in __dcigettext ()
>> (gdb) bt
>> #0  0x00007ffff7bd6833 in __dcigettext ()
>> #1  0x00007ffff7bd5352 in __assert_fail ()
>> #2  0x00007ffff7c4d74c in _dl_relocate_static_pie ()
>> #3  0x00007ffff7bc713e in __libc_start_main ()
>> #4  0x00007ffff7a0029e in _start ()
>>
>> If I build with --disable-pie it works again.
>>
>> Any idea?
> 
> I'd suggest checking the compiler args used with v5.1.0 vs git master
> and see if any flags related to PIE or similar changed. I already found
> one bug wrt PIE on Windows builds this way.
> 
> Regards,
> Daniel
> 

It's what I'm doing.

There are both "--static-pie" and "--pie" on the new command line, but
keeping only the first doesn't fix the problem.

There is also a strange '-Wl,-rpath,RIGIN/' that would mean "make" is
not using $(ORIGIN) but $ORIGIN...

Thanks,
Laurent

Re: linux-user static build broken

[Paolo Bonzini]

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$ORIGIN is a special literal used by ld.so. It's probably fixed by the same
patch that was posted for msys.

Paolo

Il mer 26 ago 2020, 10:51 Laurent Vivier <laurent@vivier.eu> ha scritto:

> Le 26/08/2020 à 10:44, Daniel P. Berrangé a écrit :
> > On Tue, Aug 25, 2020 at 10:36:13PM +0200, Laurent Vivier wrote:
> >> Hi,
> >>
> >> since we have switched to meson, the statically linked binaries of qemu
> >> linux-user are broken:
> >>
> >> cd $OBJ
> >> $SRC/configure --static --target-list=m68k-linux-user
> >> make
> >> ./qemu-m68k
> >> Segmentation fault (core dumped)
> >>
> >> Program received signal SIGSEGV, Segmentation fault.
> >> 0x00007ffff7bd6833 in __dcigettext ()
> >> (gdb) bt
> >> #0  0x00007ffff7bd6833 in __dcigettext ()
> >> #1  0x00007ffff7bd5352 in __assert_fail ()
> >> #2  0x00007ffff7c4d74c in _dl_relocate_static_pie ()
> >> #3  0x00007ffff7bc713e in __libc_start_main ()
> >> #4  0x00007ffff7a0029e in _start ()
> >>
> >> If I build with --disable-pie it works again.
> >>
> >> Any idea?
> >
> > I'd suggest checking the compiler args used with v5.1.0 vs git master
> > and see if any flags related to PIE or similar changed. I already found
> > one bug wrt PIE on Windows builds this way.
> >
> > Regards,
> > Daniel
> >
>
> It's what I'm doing.
>
> There are both "--static-pie" and "--pie" on the new command line, but
> keeping only the first doesn't fix the problem.
>
> There is also a strange '-Wl,-rpath,RIGIN/' that would mean "make" is
> not using $(ORIGIN) but $ORIGIN...
>
> Thanks,
> Laurent
>
>

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Re: linux-user static build broken

[Laurent Vivier]

Le 26/08/2020 à 11:08, Paolo Bonzini a écrit :
> $ORIGIN is a special literal used by ld.so. It's probably fixed by the
> same patch that was posted for msys.

If I remove the "-Wl,-rpath,RIGIN/" from the command line to build
qemu-m68k, it works again.

What the patch name or series?

Thanks,
Laurent

> Paolo
> 
> Il mer 26 ago 2020, 10:51 Laurent Vivier <laurent@vivier.eu
> <mailto:laurent@vivier.eu>> ha scritto:
> 
>     Le 26/08/2020 à 10:44, Daniel P. Berrangé a écrit :
>     > On Tue, Aug 25, 2020 at 10:36:13PM +0200, Laurent Vivier wrote:
>     >> Hi,
>     >>
>     >> since we have switched to meson, the statically linked binaries
>     of qemu
>     >> linux-user are broken:
>     >>
>     >> cd $OBJ
>     >> $SRC/configure --static --target-list=m68k-linux-user
>     >> make
>     >> ./qemu-m68k
>     >> Segmentation fault (core dumped)
>     >>
>     >> Program received signal SIGSEGV, Segmentation fault.
>     >> 0x00007ffff7bd6833 in __dcigettext ()
>     >> (gdb) bt
>     >> #0  0x00007ffff7bd6833 in __dcigettext ()
>     >> #1  0x00007ffff7bd5352 in __assert_fail ()
>     >> #2  0x00007ffff7c4d74c in _dl_relocate_static_pie ()
>     >> #3  0x00007ffff7bc713e in __libc_start_main ()
>     >> #4  0x00007ffff7a0029e in _start ()
>     >>
>     >> If I build with --disable-pie it works again.
>     >>
>     >> Any idea?
>     >
>     > I'd suggest checking the compiler args used with v5.1.0 vs git master
>     > and see if any flags related to PIE or similar changed. I already
>     found
>     > one bug wrt PIE on Windows builds this way.
>     >
>     > Regards,
>     > Daniel
>     >
> 
>     It's what I'm doing.
> 
>     There are both "--static-pie" and "--pie" on the new command line, but
>     keeping only the first doesn't fix the problem.
> 
>     There is also a strange '-Wl,-rpath,RIGIN/' that would mean "make" is
>     not using $(ORIGIN) but $ORIGIN...
> 
>     Thanks,
>     Laurent
> 

Re: linux-user static build broken

[Paolo Bonzini]

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Let me take a look tonight as I plan to prepare a pull request.

Paolo

Il mer 26 ago 2020, 12:53 Laurent Vivier <laurent@vivier.eu> ha scritto:

> Le 26/08/2020 à 11:08, Paolo Bonzini a écrit :
> > $ORIGIN is a special literal used by ld.so. It's probably fixed by the
> > same patch that was posted for msys.
>
> If I remove the "-Wl,-rpath,RIGIN/" from the command line to build
> qemu-m68k, it works again.
>
> What the patch name or series?
>
> Thanks,
> Laurent
>
> > Paolo
> >
> > Il mer 26 ago 2020, 10:51 Laurent Vivier <laurent@vivier.eu
> > <mailto:laurent@vivier.eu>> ha scritto:
> >
> >     Le 26/08/2020 à 10:44, Daniel P. Berrangé a écrit :
> >     > On Tue, Aug 25, 2020 at 10:36:13PM +0200, Laurent Vivier wrote:
> >     >> Hi,
> >     >>
> >     >> since we have switched to meson, the statically linked binaries
> >     of qemu
> >     >> linux-user are broken:
> >     >>
> >     >> cd $OBJ
> >     >> $SRC/configure --static --target-list=m68k-linux-user
> >     >> make
> >     >> ./qemu-m68k
> >     >> Segmentation fault (core dumped)
> >     >>
> >     >> Program received signal SIGSEGV, Segmentation fault.
> >     >> 0x00007ffff7bd6833 in __dcigettext ()
> >     >> (gdb) bt
> >     >> #0  0x00007ffff7bd6833 in __dcigettext ()
> >     >> #1  0x00007ffff7bd5352 in __assert_fail ()
> >     >> #2  0x00007ffff7c4d74c in _dl_relocate_static_pie ()
> >     >> #3  0x00007ffff7bc713e in __libc_start_main ()
> >     >> #4  0x00007ffff7a0029e in _start ()
> >     >>
> >     >> If I build with --disable-pie it works again.
> >     >>
> >     >> Any idea?
> >     >
> >     > I'd suggest checking the compiler args used with v5.1.0 vs git
> master
> >     > and see if any flags related to PIE or similar changed. I already
> >     found
> >     > one bug wrt PIE on Windows builds this way.
> >     >
> >     > Regards,
> >     > Daniel
> >     >
> >
> >     It's what I'm doing.
> >
> >     There are both "--static-pie" and "--pie" on the new command line,
> but
> >     keeping only the first doesn't fix the problem.
> >
> >     There is also a strange '-Wl,-rpath,RIGIN/' that would mean "make" is
> >     not using $(ORIGIN) but $ORIGIN...
> >
> >     Thanks,
> >     Laurent
> >
>
>

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