Both constructors and main() may be executed with different function
signatures than they are actually using.
This is intentional but trips up UBSAN.
Disable the function sanitizer of UBSAN in _start_c().
Signed-off-by: Thomas Weißschuh <li...@weissschuh.net>
---
tools/include/nolibc/crt.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/tools/include/nolibc/crt.h b/tools/include/nolibc/crt.h
index
c4b10103bbec50f1a3a0a4562e34fdbd1b43ce6f..961cfe777c3564e705dfdd581de828b374d05b0b
100644
--- a/tools/include/nolibc/crt.h
+++ b/tools/include/nolibc/crt.h
@@ -7,6 +7,8 @@
#ifndef _NOLIBC_CRT_H
#define _NOLIBC_CRT_H
+#include "compiler.h"
+
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
@@ -25,6 +27,9 @@ extern void (*const __fini_array_end[])(void)
__attribute__((weak));
void _start_c(long *sp);
__attribute__((weak,used))
+#if __nolibc_has_feature(undefined_behavior_sanitizer)
+ __attribute__((no_sanitize("function")))
+#endif
void _start_c(long *sp)
{
long argc;
--
2.49.0
