Dynamic linker issue with bind now?

[Petar Jovanovic <petar dot jovanovic at rt-rk dot com>]

Hello everyone,

Is it possible that someone familiar enough with elf/dynamic-link.h
takes a look at _ELF_DYNAMIC_DO_RELOC macro?
I am under impression that the macro does not correctly handle a case
when DT_REL* and DT_JMPREL are completely separated and there is a gap
between them.
Previously, David S. Miller's patch [1] aimed to fix that case.

Ergo, the code will work in the lazy-bound case, but not in the
bind-now case, and DT_JMPREL section will not be processed. In a
particular case that I have come across, this caused a crash in
_PROCEDURE_LINKAGE_TABLE_, since plt entry for libc_start_main function
did not get updated.

If my assumptions are correct, I would propose a patch that will resolve
the case. Otherwise, I would appreciate explanation how that case gets
resolved correctly.

Thank you.

Regards,
Petar

[1] ld.so regression patch,
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=d7dd44133f53e8bcc81e18c11694bee985cd86d0

Petar Jovanovic (1):
  Fix dynamic linker issue with bind-now

 elf/dynamic-link.h |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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1.7.9.5