xnu-3789.31.2.tar.gz

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

diff --git a/bsd/libkern/libkern.h b/bsd/libkern/libkern.h
index 651a013901c53d5030eb460ebd02879eff2a74f0..4e660600792e516ab39cbe6bc8de4b2b083a69be 100644 (file)
--- a/bsd/libkern/libkern.h
+++ b/bsd/libkern/libkern.h
@@ -73,6 +73,7 @@
 #include <stdint.h>
 #include <stdarg.h>    /* for platform-specific va_list */
 #include <string.h>
+#include <machine/limits.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <mach/vm_param.h>
@@ -168,6 +169,7 @@ int _consume_printf_args(int, ...);
 #endif
 #endif
 
+uint16_t       crc16(uint16_t crc, const void *bufp, size_t len);
 uint32_t       crc32(uint32_t crc, const void *bufp, size_t len);
 
 int    copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done);
@@ -175,12 +177,21 @@ 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);
 int    copyin(const user_addr_t uaddr, void *kaddr, size_t len);
 int    copyout(const void *kaddr, user_addr_t udaddr, size_t len);
+#if XNU_KERNEL_PRIVATE
+extern int copyin_word(const user_addr_t user_addr, uint64_t *kernel_addr, vm_size_t nbytes);
+#endif
 
 int vsscanf(const char *, char const *, va_list);
 
 extern int     vprintf(const char *, va_list);
 extern int     vsnprintf(char *, size_t, const char *, va_list);
 
+#if XNU_KERNEL_PRIVATE
+extern int     vprintf_log_locked(const char *, va_list);
+extern void    osobject_retain(void * object);
+extern void    osobject_release(void * object);
+#endif
+
 /* vsprintf() is being deprecated. Please use vsnprintf() instead. */
 extern int     vsprintf(char *bufp, const char *, va_list) __deprecated;
 
@@ -195,18 +206,13 @@ extern void invalidate_icache64(addr64_t, unsigned, int);
 extern void flush_dcache64(addr64_t, unsigned, int);
 
 
-/*
- * assembly versions of clz... ideally we would just call
- * __builtin_clz(num), unfortunately this one is ill defined
- * by gcc for num=0
- */
-static __inline__ unsigned int
+static inline int
 clz(unsigned int num)
 {
-       return num?__builtin_clz(num):__builtin_clz(0);
+       // On Intel, clz(0) is undefined
+       return num ? __builtin_clz(num) : sizeof(num) * CHAR_BIT;
 }
 
-
 __END_DECLS
 
 #endif /* _LIBKERN_LIBKERN_H_ */