xnu-4570.51.1.tar.gz

[apple/xnu.git] / bsd / libkern / libkern.h

diff --git a/bsd/libkern/libkern.h b/bsd/libkern/libkern.h
index e2a47fdefef1ed617f553b3d16b7f2f190e00e1c..fa8317325e493498ece6e0f33e8b9040f546c473 100644 (file)
--- a/bsd/libkern/libkern.h
+++ b/bsd/libkern/libkern.h
@@ -179,6 +179,15 @@ int        _consume_printf_args(int, ...);
 uint16_t       crc16(uint16_t crc, const void *bufp, size_t len);
 uint32_t       crc32(uint32_t crc, const void *bufp, size_t len);
 
+#if XNU_KERNEL_PRIVATE
+#if KASAN
+uint16_t __nosan_crc16(uint16_t crc, const void *bufp, size_t len);
+#else
+static inline uint16_t
+__nosan_crc16(uint16_t crc, const void *bufp, size_t len) { return crc16(crc, bufp, len); }
+#endif
+#endif
+
 int    copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done);
 int    copyinstr(const user_addr_t uaddr, void *kaddr, size_t len, size_t *done);
 int    copyoutstr(const void *kaddr, user_addr_t udaddr, size_t len, size_t *done);
@@ -229,6 +238,20 @@ clz(unsigned int num)
 #endif
 }
 
+#if XNU_KERNEL_PRIVATE
+
+/*
+ * Define a function that for whatever reason needs to exist, but must never be
+ * called.
+ */
+#define UNSUPPORTED_API(funcname, ...) \
+       _Pragma("clang diagnostic push") \
+       _Pragma("clang diagnostic ignored \"-Wunused-parameter\"") \
+       funcname(__VA_ARGS__) { panic(__func__ ": unsupported API\n"); } \
+       _Pragma("clang diagnostic pop")
+
+#endif
+
 __END_DECLS
 
 #endif /* _LIBKERN_LIBKERN_H_ */