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authorNick Alcock <nick.alcock@oracle.com>2016-12-26 10:08:41 +0100
committerFlorian Weimer <fweimer@redhat.com>2016-12-26 10:08:41 +0100
commitde6591238b478bc86b8cf5af01a484114e399213 (patch)
tree2717c115fbc7518fcbe9348239ff536eb914d267 /sysdeps/nacl
parent003a27e8195470f470f4d9384ca70d4e9fc8bd1b (diff)
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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 'sysdeps/nacl')
-rw-r--r--sysdeps/nacl/nacl_interface_query.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/nacl/nacl_interface_query.c b/sysdeps/nacl/nacl_interface_query.c
index adf1dd4c02..dbaa88b037 100644
--- a/sysdeps/nacl/nacl_interface_query.c
+++ b/sysdeps/nacl/nacl_interface_query.c
@@ -29,6 +29,7 @@ extern TYPE_nacl_irt_query nacl_interface_query_ifunc (void)
   asm ("nacl_interface_query");
 
 TYPE_nacl_irt_query
+inhibit_stack_protector
 nacl_interface_query_ifunc (void)
 {
   return &__nacl_irt_query;