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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 /config.h.in | |
| parent | 003a27e8195470f470f4d9384ca70d4e9fc8bd1b (diff) | |
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 'config.h.in')
| -rw-r--r-- | config.h.in | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/config.h.in b/config.h.in index d96ce0f8cf..82f95a6dbd 100644 --- a/config.h.in +++ b/config.h.in @@ -48,6 +48,10 @@ /* Define if compiler accepts -ftree-loop-distribute-patterns. */ #undef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL +/* Define if compiler accepts -fno-stack-protector in an + __attribute__ ((__optimize__)). */ +#undef HAVE_CC_NO_STACK_PROTECTOR + /* The level of stack protection in use for glibc as a whole. May be overridden on a file-by-file basis. */ #ifndef STACK_PROTECTOR_LEVEL |