Re: [Tinycc-devel] tcc crashes at the dlltest in Fedora 30

[Christian Jullien]

> Christian J.: you should also test your Fedora 29 setup, the idea is, that 
> current mob is at least as good as (and actually better than) after commit 
> fef838db.

Sorry, I upgraded my Fedora 29 => 30. I just can say that your patch on mob 
works flawlessly now on this system.

Thank you for your time.

C.

-----Original Message-----
From: Tinycc-devel [mailto:tinycc-devel-bounces+eligis=address@hidden] On 
Behalf Of Michael Matz
Sent: Sunday, June 16, 2019 23:00
To: address@hidden
Cc: address@hidden
Subject: Re: [Tinycc-devel] tcc crashes at the dlltest in Fedora 30

Hi,

On Sun, 16 Jun 2019, C.J. Wagenius wrote:

> Thanks for info. Sorry for not checking the history of this.
>
> There seems to be a section in crti.o that messes things up. Its name is 
> ".rela.gnu.build.attributes" and I can't see that anything like it loads 
> from the crti.o of CentOS 7 (gcc version 4.8.5 20150623, glibc 2.17). I 
> have no clue why it doesn't get its sh_info value set (or if that's the 
> root of the problem at all); which seems to be the case for other 
> SHT_RELX sections. Neither do I know the importance of this particular 
> section. I don't know anything about this crt-stuff to be honest. First 
> time I'm looking in to it.
>
> https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00018.html 
> <https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00018.html>
> This doesn't work. It ends up in some invalid section type errors.

Hmm, I seem to have dropped the ball on this one, sorry for that.  Can you 
please try current mob.  I've committed a nicer fix than fef838db which 
should take care of the problem (which is, that while in some parts 
of TCC reloc sections to ignored sections are correctly ignored, in other 
parts (when creating shared libraries) they weren't ignored completely).

Christian J.: you should also test your Fedora 29 setup, the idea is, that 
current mob is at least as good as (and actually better than) after commit 
fef838db.


Ciao,
Michael.


> ---
> make[2]: Entering directory '/home/cjw/Temp/tinycc/tests'
> ------------ hello-exe ------------
> ../tcc -B.. -I../include -I.. -I.. ../examples/ex1.c -o hello && ./hello || 
> (set -x; ../tcc -vv; ldd ../tcc; exit 1)
> /usr/lib64/crti.o: error: invalid section type
> ---
>
> https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00017.html 
> <https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00017.html>
> This is the conclusion I came up with too. It seems to work but I don't know 
> all side effects of it.
>
>
> I hope this information can help in any way.
>
> /cjw
>
> 16 juni 2019 06:55 av address@hidden:
>
>> Yes this known,
>> See thread started by 
>> "https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00000.html";
>>
>> And my investigations with (possible?) fix
>> https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00017.html
>> https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00018.html
>>
>> As I'm far to be an ELF expert, I'm waiting for someone to understand what 
>> happens ... and to do the right fix.
>>
>> C.
>>
>> -----Original Message-----
>> From: Tinycc-devel [mailto:tinycc-devel-bounces+eligis=address@hidden] On 
>> Behalf Of C.J. Wagenius
>> Sent: Saturday, June 15, 2019 22:26
>> To: address@hidden
>> Subject: [Tinycc-devel] tcc crashes at the dlltest in Fedora 30
>>
>> gcc version 9.1.1 20190503, glibc-2.29
>>
>> ../tcc -B.. -I../include -I.. -I.. -DCONFIG_LDDIR="\"lib64\"" 
>> -DTCC_TARGET_X86_64 -DHAVE_SELINUX -DLIBTCC_AS_DLL ../libtcc.c -lm -ldl 
>> -shared -o libtcc2.so
>> make[2]: *** [Makefile:134: dlltest] Segmentation fault (core dumped)
>>
>> Regards
>>
>> /cjw
>>
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>
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