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author | Nick Alcock <nick.alcock@oracle.com> | 2016-12-26 10:08:41 +0100 |
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committer | Florian Weimer <fweimer@redhat.com> | 2016-12-26 10:08:41 +0100 |
commit | de6591238b478bc86b8cf5af01a484114e399213 (patch) | |
tree | 2717c115fbc7518fcbe9348239ff536eb914d267 /sysdeps/powerpc | |
parent | 003a27e8195470f470f4d9384ca70d4e9fc8bd1b (diff) | |
download | glibc-de6591238b478bc86b8cf5af01a484114e399213.tar.gz glibc-de6591238b478bc86b8cf5af01a484114e399213.tar.xz glibc-de6591238b478bc86b8cf5af01a484114e399213.zip |
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/powerpc')
-rw-r--r-- | sysdeps/powerpc/ifunc-sel.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/powerpc/ifunc-sel.h b/sysdeps/powerpc/ifunc-sel.h index ac589bd3c0..bdb00bf2c6 100644 --- a/sysdeps/powerpc/ifunc-sel.h +++ b/sysdeps/powerpc/ifunc-sel.h @@ -5,6 +5,7 @@ extern int global; static inline void * +inhibit_stack_protector ifunc_sel (int (*f1) (void), int (*f2) (void), int (*f3) (void)) { register void *ret __asm__ ("r3"); @@ -32,6 +33,7 @@ ifunc_sel (int (*f1) (void), int (*f2) (void), int (*f3) (void)) } static inline void * +inhibit_stack_protector ifunc_one (int (*f1) (void)) { register void *ret __asm__ ("r3"); |