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| author | Nick Alcock <nick.alcock@oracle.com> | 2016-12-26 10:08:41 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-12-26 10:08:41 +0100 |
| commit | de6591238b478bc86b8cf5af01a484114e399213 (patch) | |
| tree | 2717c115fbc7518fcbe9348239ff536eb914d267 /configure.ac | |
| parent | 003a27e8195470f470f4d9384ca70d4e9fc8bd1b (diff) | |
| download | glibc-de6591238b478bc86b8cf5af01a484114e399213.tar.gz | |
Do not stack-protect ifunc resolvers [BZ #7065]
When dynamically linking, ifunc resolvers are called before TLS is
initialized, so they cannot be safely stack-protected.
We avoid disabling stack-protection on large numbers of files by
using __attribute__ ((__optimize__ ("-fno-stack-protector")))
to turn it off just for the resolvers themselves. (We provide
the attribute even when statically linking, because we will later
use it elsewhere too.)
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index c159768984..f5fa1aaefa 100644 --- a/configure.ac +++ b/configure.ac @@ -653,6 +653,7 @@ stack_protector= no_stack_protector= if test "$libc_cv_ssp" = yes; then no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0" + AC_DEFINE(HAVE_CC_NO_STACK_PROTECTOR) fi if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then |