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| author | Nick Alcock <nick.alcock@oracle.com> | 2016-12-26 10:09:06 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-12-26 10:11:06 +0100 |
| commit | 2e6c45c59bcd40f1ae8466cbd32f4d263ff45619 (patch) | |
| tree | fc558d3f90670cf9028bfd33839dbe75c2d674bb /signal | |
| parent | 1ad4ba28e9335c288687d1757bce3221c522f576 (diff) | |
| download | glibc-2e6c45c59bcd40f1ae8466cbd32f4d263ff45619.tar.gz glibc-2e6c45c59bcd40f1ae8466cbd32f4d263ff45619.tar.xz glibc-2e6c45c59bcd40f1ae8466cbd32f4d263ff45619.zip | |
Do not stack-protect sigreturn stubs [BZ #7065]
These are called from the kernel with the stack at a carefully- chosen location so that the stack frame can be restored: they must not move the stack pointer lest garbage be restored into the registers. We explicitly inhibit protection for SPARC and for signal/sigreturn.c: other arches either define their sigreturn stubs in .S files, or (i386, x86_64, mips) use macros expanding to top-level asm blocks and explicit labels in the text section to mock up a "function" without telling the compiler that one is there at all.
Diffstat (limited to 'signal')
| -rw-r--r-- | signal/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/signal/Makefile b/signal/Makefile index 9d29ff49f3..ccd6f51619 100644 --- a/signal/Makefile +++ b/signal/Makefile @@ -48,3 +48,5 @@ CFLAGS-sigsuspend.c = -fexceptions -fasynchronous-unwind-tables CFLAGS-sigtimedwait.c = -fexceptions -fasynchronous-unwind-tables CFLAGS-sigwait.c = -fexceptions -fasynchronous-unwind-tables CFLAGS-sigwaitinfo.c = -fexceptions -fasynchronous-unwind-tables + +CFLAGS-sigreturn.c = $(no-stack-protector) |