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[Bug build/7065] Support building glibc with -fstack-protector or -fstack-protector-all
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Mon, 10 Jul 2017 17:28:27 +0000
- Subject: [Bug build/7065] Support building glibc with -fstack-protector or -fstack-protector-all
- Auto-submitted: auto-generated
- References: <bug-7065-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=7065
--- Comment #32 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".
The branch, hjl/pr21740 has been created
at 217275043ad73f922d07f42e5fc1a4be70183209 (commit)
- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=217275043ad73f922d07f42e5fc1a4be70183209
commit 217275043ad73f922d07f42e5fc1a4be70183209
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Sun Jul 9 08:39:17 2017 -0700
Add __stack_chk_fail_local alias only to libc.so [BZ #21740]
commit 524a8ef2ad76af8ac049293d993a1856b0d888fb
Author: Nick Alcock <nick.alcock@oracle.com>
Date: Mon Dec 26 10:08:57 2016 +0100
PLT avoidance for __stack_chk_fail [BZ #7065]
Add a hidden __stack_chk_fail_local alias to libc.so,
and make sure that on targets which use __stack_chk_fail,
this does not introduce a local PLT reference into libc.so.
unconditionally added
strong_alias (__stack_chk_fail, __stack_chk_fail_local)
Since libc.a and libc_nonshared.a has debug/stack_chk_fail_local.c,
__stack_chk_fail_local alias should be limited to libc.so.
Tested on x86-64 with --enable-stack-protector=all and got
FAIL: elf/tst-env-setuid
FAIL: elf/tst-env-setuid-tunables
FAIL: stdlib/tst-secure-getenv
which are the same as without this patch.
[BZ #21740]
* debug/stack_chk_fail.c (__stack_chk_fail_local): Add the
alias only if SHARED is defined.
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