xnu-4903.231.4.tar.gz

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

diff --git a/bsd/libkern/libkern.h b/bsd/libkern/libkern.h
index 4e660600792e516ab39cbe6bc8de4b2b083a69be..73545298d305961360af39e1b3e25e6c93d5ef70 100644 (file)
--- a/bsd/libkern/libkern.h
+++ b/bsd/libkern/libkern.h
@@ -77,7 +77,12 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <mach/vm_param.h>
+#include <libkern/crc.h>
+#include <libkern/copyio.h>
 
+#if defined(__arm__) || defined(__arm64__)
+#include <arm/arch.h> /* for _ARM_ARCH_* */
+#endif
 
 #ifdef __APPLE_API_OBSOLETE
 /* BCD conversions. */
@@ -140,6 +145,9 @@ ulmin(u_int32_t a, u_int32_t b)
 
 /* Prototypes for non-quad routines. */
 extern int     ffs(int);
+extern int     ffsll(unsigned long long);
+extern int     fls(int);
+extern int     flsll(unsigned long long);
 extern u_int32_t       random(void);
 extern int     scanc(u_int, u_char *, const u_char *, int);
 extern int     skpc(int, int, char *);
@@ -149,11 +157,12 @@ extern quad_t     strtoq(const char *, char **, int);
 extern u_quad_t strtouq(const char *, char **, int);
 extern char    *strsep(char **, const char *);
 extern void    *memchr(const void *, int, size_t);
+extern void    url_decode(char *str);
 
 int    snprintf(char *, size_t, const char *, ...) __printflike(3,4);
 
 /* sprintf() is being deprecated. Please use snprintf() instead. */
-int    sprintf(char *bufp, const char *, ...) __deprecated;
+int    sprintf(char *bufp, const char *, ...) __deprecated __printflike(2,3);
 int    sscanf(const char *, char const *, ...) __scanflike(2,3);
 int    printf(const char *, ...) __printflike(1,2);
 
@@ -172,30 +181,41 @@ 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);
-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);
+extern int     vprintf(const char *, va_list) __printflike(1,0);
+extern int     vsnprintf(char *, size_t, const char *, va_list) __printflike(3,0);
 
 #if XNU_KERNEL_PRIVATE
-extern int     vprintf_log_locked(const char *, va_list);
+extern int     vprintf_log_locked(const char *, va_list) __printflike(1,0);
 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;
+extern int     vsprintf(char *bufp, const char *, va_list) __deprecated __printflike(2,0);
 
 #ifdef KERNEL_PRIVATE
+#ifdef __arm__
+void flush_inner_dcaches(void);
+void clean_inner_dcaches(void);
+#endif
 extern void invalidate_icache(vm_offset_t, unsigned, int);
 extern void flush_dcache(vm_offset_t, unsigned, int);
 #else
@@ -209,10 +229,29 @@ extern void flush_dcache64(addr64_t, unsigned, int);
 static inline int
 clz(unsigned int num)
 {
+#if (__arm__ || __arm64__)
+       // On ARM, clz(0) is defined to return number of bits in the input type
+       return __builtin_clz(num);
+#else
        // On Intel, clz(0) is undefined
        return num ? __builtin_clz(num) : sizeof(num) * CHAR_BIT;
+#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_ */