Red Hat Bugzilla – Bug 1010392
prelink causes python and others to crash on s390x
Last modified: 2015-02-18 06:14:01 EST
Created attachment 800574 [details]
Description of problem:
The prelinker causes several programs to crash on s390x. The problem
is that an R_390_IRELATIVE relocation for a memcpy IPLT in libc gets
added to the conflict list as a normal R_390_64 relocation. The IPLT
then ends up calling the ifunc resolver rather than a real memcpy
Version-Release number of selected component (if applicable):
Steps to Reproduce:
From an un-prelinked state:
$ sudo prelink /usr/bin/python
Segmentation fault (core dumped)
$ sudo prelink -u /usr/bin/python
Python 2.7.5 (default, Aug 27 2013, 05:19:42)
[GCC 4.8.1 20130603 (Red Hat 4.8.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
The attached patch fixes things for me.
Looks correct, committed as r207 to prelink SVN. Will try to add a testcase tomorrow.
I've also committed s390 and s390x additions to testsuite/ifunc.h, with r207 reverted all the ifunc* tests FAIL on s390x, with r207 they all pass.
There was a similar bug to this in s390 31-bit support, committed as r209.
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