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authorPaul Lawrence <[email protected]>2018-02-06 15:36:03 -0800
committerLinus Torvalds <[email protected]>2018-02-06 18:32:42 -0800
commit53a98ed73b848432a51631346b02049bb7fa039d (patch)
treef923b316690f5fd0064f5e6a968acf82c33b1420
parent0e410e158e5baa1300bdf678cea4f4e0cf9d8b94 (diff)
kasan: add compiler support for clang
Patch series "kasan: support alloca, LLVM", v4. This patch (of 5): For now we can hard-code ASAN ABI level 5, since historical clang builds can't build the kernel anyway. We also need to emulate gcc's __SANITIZE_ADDRESS__ flag, or memset() calls won't be instrumented. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Hackmann <[email protected]> Signed-off-by: Paul Lawrence <[email protected]> Acked-by: Andrey Ryabinin <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Masahiro Yamada <[email protected]> Cc: Matthias Kaehlcke <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r--include/linux/compiler-clang.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
index 3b609edffa8f..d02a4df3f473 100644
--- a/include/linux/compiler-clang.h
+++ b/include/linux/compiler-clang.h
@@ -19,3 +19,11 @@
#define randomized_struct_fields_start struct {
#define randomized_struct_fields_end };
+
+/* all clang versions usable with the kernel support KASAN ABI version 5 */
+#define KASAN_ABI_VERSION 5
+
+/* emulate gcc's __SANITIZE_ADDRESS__ flag */
+#if __has_feature(address_sanitizer)
+#define __SANITIZE_ADDRESS__
+#endif