commit f9c96e041d49596492144674ec8c2e2bc3a7216c
author Doug Evans <dje@google.com> Thu Feb 09 15:44:23 2017 -0800
committer Doug Evans <dje@google.com> Fri Feb 10 14:49:02 2017 -0800
tree 781835a15675f87907f77d557e2c39b9c30e419d
parent 0b45d6efbb9e57b1c5bb4c585a60b410c5fe0337

Fix handling of fully zeroed PT_GNU_RELRO

From PR 21126:
strip can now fully zero out PT_GNU_RELRO segments
(as in even the segment type is changed to PT_NULL).

The bug has been seen with recent versions of strip on clang-built binaries
when used with gdbserver.
gdb's exec_bfd needs to be the non-stripped version and the program running
 needs to be the stripped version in order to see the bug.

gdb/ChangeLog:

        PR symtab/21126
        * solib-svr4.c (svr4_exec_displacment): Ignore PT_GNU_RELRO segment.

testsuite/ChangeLog:

        PR symtab/21126
        * gdb.server/stripped-pie.exp: New testcase.

Change-Id: Iac9ce2275084ee4c5a107f3a4ef72dc3ac12f1bd