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sh: initial stack protector support.

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This implements basic -fstack-protector support, based on the early ARM
version in c743f38013. 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>
This commit is contained in:
Filippo Arcidiacono 2012-04-19 15:45:57 +09:00 • committed by Paul Mundt
parent 932e9f352b
commit 5d920bb929
5 changed files with 57 additions and 0 deletions
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7
arch/sh/kernel/process.c
View file

@ -2,10 +2,17 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/export.h>
#include <linux/stackprotector.h>
struct kmem_cache *task_xstate_cachep = NULL;
unsigned int xstate_size;
#ifdef CONFIG_CC_STACKPROTECTOR
unsigned long __stack_chk_guard __read_mostly;
EXPORT_SYMBOL(__stack_chk_guard);
#endif
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
*dst = *src;