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| author | Nick Alcock <nick.alcock@oracle.com> | 2016-12-26 10:08:54 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-12-26 10:10:58 +0100 |
| commit | 66a704c43cfec810fea67a6959f2d1c94f4d594f (patch) | |
| tree | 174dece4f1f3b73874398c029f8aa96911632e9d /ChangeLog | |
| parent | bc174f20b83d19167ecac14ce0762eddbe47cc64 (diff) | |
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Work even with compilers which enable -fstack-protector by default [BZ #7065]
With all the machinery we just added, we can easily arrange to work even
when the compiler passes in -fstack-protector automatically: all the
necessary bits of glibc are always compiled with -fno-stack-protector
now.
So tear out the check in configure, and add appropriate calls to
-fno-stack-protector in tests that need them (largely those that use
-nostdlib), since we don't yet have a __stack_chk_fail that those
tests can rely upon. (GCC often provides one, but we cannot rely on
this, especially not when bootstrapping.)
When stack protection is disabled, explicitly pass -fno-stack-protector
to everything, to stop a compiler hacked to enable it from inserting
calls to __stack_chk_fail via the PLT in every object file.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -1,6 +1,27 @@ 2016-12-26 Nick Alcock <nick.alcock@oracle.com> [BZ #7065] + * configure.ac: Add check for unsupported stack-protection level. + (libc_cv_predef_stack_protector): Remove. + (no_ssp): New variable. + (STACK_PROTECTOR_LEVEL): Set to zero when --disable-stack-protector. + (stack_protector): Set to -fno-stack-protector similarly. + (libc_cv_ld_gnu_indirect_function): Use no_ssp. + (libc_cv_asm_set_directive): Likewise. + (libc_cv_protected_data): Likewise. + (libc_cv_z_combreloc): Likewise. + (libc_cv_hashstyle): Likewise. + (libc_cv_has_glob_dat): Likewise. + (libc_cv_output_format): Likewise. + (libc_cv_output_format): Likewise. + (libc_cv_ehdr_start): Likewise. + * aclocal.m4 (LIBC_TRY_LINK_STATIC): Likewise. + (LIBC_LINKER_FEATURE): Likewise. + (LIBC_COMPILER_BUILTIN_INLINED): Likewise. + +2016-12-26 Nick Alcock <nick.alcock@oracle.com> + + [BZ #7065] * elf/Makefile (dummy-stack-chk-fail): New. (librtld.map): Use it. |