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| author | Filippo Arcidiacono | 2012-04-19 08:45:57 +0200 |
|---|---|---|
| committer | Paul Mundt | 2012-04-19 08:45:57 +0200 |
| commit | 5d920bb929a99446062a48cf90867bbca57b8e77 (patch) | |
| tree | fdadebe0b0fe8906ffd81ad9f726430d6428a8f5 /arch/sh/Kconfig | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmo... (diff) | |
| download | kernel-qcow2-linux-5d920bb929a99446062a48cf90867bbca57b8e77.tar.gz kernel-qcow2-linux-5d920bb929a99446062a48cf90867bbca57b8e77.tar.xz kernel-qcow2-linux-5d920bb929a99446062a48cf90867bbca57b8e77.zip | |
sh: initial stack protector support.
This implements basic -fstack-protector support, based on the early ARM
version in c743f38013aeff58ef6252601e397b5ba281c633. The SMP case is
limited to the initial canary value, while the UP case handles per-task
granularity (limited to 32-bit sh until a new enough sh64 compiler
manifests itself).
Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Reviewed-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/Kconfig')
| -rw-r--r-- | arch/sh/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index ff9e033ce626..60ed3669979d 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -685,6 +685,20 @@ config SECCOMP If unsure, say N. +config CC_STACKPROTECTOR + bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" + depends on SUPERH32 && EXPERIMENTAL + help + This option turns on the -fstack-protector GCC feature. This + feature puts, at the beginning of functions, a canary value on + the stack just before the return address, and validates + the value just before actually returning. Stack based buffer + overflows (that need to overwrite this return address) now also + overwrite the canary, which gets detected and the attack is then + neutralized via a kernel panic. + + This feature requires gcc version 4.2 or above. + config SMP bool "Symmetric multi-processing support" depends on SYS_SUPPORTS_SMP |