[Bug ld/21180] ld segfault for microblaze when --gc-sections is used

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21180

Nick Clifton  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |FIXED

--- Comment #6 from Nick Clifton  ---
Patch applied.

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[Bug ld/21180] ld segfault for microblaze when --gc-sections is used

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=21180

--- Comment #5 from cvs-commit at gcc dot gnu.org  ---
The master branch has been updated by Nick Clifton :

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=bd757ca7bf5886a4025ca02093fca1b8c5ce11a2

commit bd757ca7bf5886a4025ca02093fca1b8c5ce11a2
Author: Nick Clifton 
Date:   Mon Feb 27 11:33:05 2017 +

Fix segfault in microblaze linker when garbage collection removes a symbol
scheduled for a slot in the PLT.

PR ld/21180
* elf32-microblaze.c (microblaze_elf_finish_dynamic_symbol): Avoid
generating a seg-fault when encountering a symbol that has been
deleted by garbage collection.

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[Bug ld/21180] ld segfault for microblaze when --gc-sections is used

[wbx at openadk dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=21180

--- Comment #4 from wbx at openadk dot org ---
Works for me. No segfaults anymore, certutil application inside libnss shows no
problems.

Thanks for the bugfix,
 Waldemar

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[Bug ld/21180] ld segfault for microblaze when --gc-sections is used

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21180

--- Comment #3 from Nick Clifton  ---
Created attachment 9849
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9849=edit
Proposed patch

Thanks - I can reproduce the problem now.

Please could you try out the uploaded patch and let me know if it works - and
if the resulting library actually executes properly...

The patch is more of a workaround than a fix, since it ends up creating a
redundant entry in the GOT table.  But I believe in keeping things simple, so
if
it works I am happy to apply it as is.

Cheers
  Nick

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[Bug ld/21180] ld segfault for microblaze when --gc-sections is used

[wbx at openadk dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=21180

wbx at openadk dot org changed:

   What|Removed |Added

 Target||microblaze
   Host||x86_64
  Build||x86_64

--- Comment #2 from wbx at openadk dot org ---
You don't need microblaze hardware, the problem appear while cross-compiling
from x86_64 to microblaze. The segfault happens without any assertion failure
while trying to cross-compile libnss or kmod.

You can reproduce using for example Buildroot or OpenADK buildsystem targeting 
Qemu system for microblaze.

git clone git://buildroot.org/buildroot 
cd buildroot
git revert fceb1afd5dda45cf180f22877a6ab0e51d1b3dac
make qemu_microblazeel_mmu_defconfig
make menuconfig
--> choose Target Packages - Libraries - Crypto - libnss
make V=1

Wait a while for the segfault happening.

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[Bug ld/21180] ld segfault for microblaze when --gc-sections is used

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21180

Nick Clifton  changed:

   What|Removed |Added

 CC||nickc at redhat dot com

--- Comment #1 from Nick Clifton  ---
Would it be possible for you to provide us with a testcase that demonstrates
this problem ?  I do not have access to a microblaze system so I cannot just
download and build nss.

Also - is an assertion being triggered, and if so, what is the message and
line number associated with the assertion failure ?

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