[RFC PATCH V1 6/8] kasan: Allow arch to overrride kasan shadow offsets
From: Aneesh Kumar K.V <hidden>
Date: 2015-08-17 06:38:08
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
Some archs may want to provide kasan shadow memory as a constant offset from the address. Such arch even though cannot use inline kasan support, they can work with outofline kasan support. Signed-off-by: Aneesh Kumar K.V <redacted> --- include/linux/kasan.h | 3 +++ mm/kasan/kasan.h | 3 +++ 2 files changed, 6 insertions(+)
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 5486d777b706..e458ca64cdaf 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h@@ -15,11 +15,14 @@ struct vm_struct; #include <asm/kasan.h> #include <linux/sched.h> +#ifndef kasan_mem_to_shadow static inline void *kasan_mem_to_shadow(const void *addr) { return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET; } +#define kasan_mem_to_shadow kasan_mem_to_shadow +#endif /* Enable reporting bugs after kasan_disable_current() */ static inline void kasan_enable_current(void)
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index deb547d5a916..c0686f2b1224 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h@@ -57,11 +57,14 @@ struct kasan_global { void kasan_report_error(struct kasan_access_info *info); void kasan_report_user_access(struct kasan_access_info *info); +#ifndef kasan_shadow_to_mem static inline const void *kasan_shadow_to_mem(const void *shadow_addr) { return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET) << KASAN_SHADOW_SCALE_SHIFT); } +#define kasan_shadow_to_mem kasan_shadow_to_mem +#endif static inline bool kasan_report_enabled(void) {
--
2.5.0