[PATCH 2/3] tools/nolibc: support UBSAN on gcc

[Thomas Weißschuh]

The UBSAN implementation in gcc requires a slightly different function
attribute to skip instrumentation.

Extend __nolibc_no_sanitize_undefined to also handle gcc.

Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
 tools/include/nolibc/compiler.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/include/nolibc/compiler.h b/tools/include/nolibc/compiler.h
index b1239344d894..b56570bf9f69 100644
--- a/tools/include/nolibc/compiler.h
+++ b/tools/include/nolibc/compiler.h
@@ -81,7 +81,11 @@
 #define _NOLIBC_OPTIMIZER_HIDE_VAR(var)	__asm__ ("" : "+r" (var))
 
 #if __nolibc_has_feature(undefined_behavior_sanitizer)
-#  define __nolibc_no_sanitize_undefined __attribute__((no_sanitize("function")))
+#  if defined(__clang__)
+#    define __nolibc_no_sanitize_undefined __attribute__((no_sanitize("function")))
+#  else
+#    define __nolibc_no_sanitize_undefined __attribute__((no_sanitize_undefined))
+#  endif
 #else
 #  define __nolibc_no_sanitize_undefined
 #endif

-- 
2.53.0