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

[C.J. Wagenius]

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.
---
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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