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Date: Tue, 26 May 2015 11:56:41 +0200
From: Florian Weimer <>
Subject: ELF PLT changes in gcc/binutils/glibc

There are some changes in the pipeline which change the way dynamic
linking works, particularly in combination with BIND_NOW/-z now:

GCC and -fno-plt:


binutils PLT->GOT elision with -Wl,z,now:


glibc fixes for binutils changes:


I have been asked to comment on these developments, but I feel that I
lack sufficient data to make a recommendation one way or the other.  I
know that some people feel strongly about ROP opportunities and indirect
calls, so they might want to comment (presumably on the glibc mailing
list, libc-alpha).

Florian Weimer / Red Hat Product Security

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