xnu-6153.141.1.tar.gz

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

diff --git a/bsd/libkern/libkern.h b/bsd/libkern/libkern.h
index 58e0224f65c9e528936f182048b793ec7dcf0875..b95c70e3cb8ece4d151089470342375ca32dd274 100644 (file)
--- a/bsd/libkern/libkern.h
+++ b/bsd/libkern/libkern.h
@@ -1,15 +1,20 @@
 /*
 /*

- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in

- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -17,8 +22,8 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*-
  * Copyright (c) 1992, 1993
  */
 /*-
  * Copyright (c) 1992, 1993


@@ -54,108 +59,214 @@
  *
  *     @(#)libkern.h   8.1 (Berkeley) 6/10/93
  */
  *
  *     @(#)libkern.h   8.1 (Berkeley) 6/10/93
  */

+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections.  This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */

 
 #ifndef _LIBKERN_LIBKERN_H_
 #define _LIBKERN_LIBKERN_H_
 
 #include <sys/appleapiopts.h>
 #include <stdint.h>
 
 #ifndef _LIBKERN_LIBKERN_H_
 #define _LIBKERN_LIBKERN_H_
 
 #include <sys/appleapiopts.h>
 #include <stdint.h>

+#include <stdarg.h>     /* for platform-specific va_list */

 #include <string.h>
 #include <string.h>

+#include <machine/limits.h>

 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <mach/vm_param.h>
 #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. */
 
 #ifdef __APPLE_API_OBSOLETE
 /* BCD conversions. */

-extern u_char const    bcd2bin_data[];
-extern u_char const    bin2bcd_data[];
+extern u_char const     bcd2bin_data[];
+extern u_char const     bin2bcd_data[];

 
 

-#define        bcd2bin(bcd)    (bcd2bin_data[bcd])
-#define        bin2bcd(bin)    (bin2bcd_data[bin])
+#define bcd2bin(bcd)    (bcd2bin_data[bcd])
+#define bin2bcd(bin)    (bin2bcd_data[bin])

 #endif /* __APPLE_API_OBSOLETE */
 
 #ifdef __APPLE_API_PRIVATE
 #endif /* __APPLE_API_OBSOLETE */
 
 #ifdef __APPLE_API_PRIVATE

-extern char const      hex2ascii_data[];
+extern char const       hex2ascii_data[];

 
 

-#define        hex2ascii(hex)  (hex2ascii_data[hex])
+#define hex2ascii(hex)  (hex2ascii_data[hex])

 #endif /* __APPLE_API_PRIVATE */
 
 __BEGIN_DECLS
 static inline int
 imax(int a, int b)
 {
 #endif /* __APPLE_API_PRIVATE */
 
 __BEGIN_DECLS
 static inline int
 imax(int a, int b)
 {

-       return (a > b ? a : b);
+       return a > b ? a : b;

 }
 static inline int
 imin(int a, int b)
 {
 }
 static inline int
 imin(int a, int b)
 {

-       return (a < b ? a : b);
+       return a < b ? a : b;

 }
 static inline long
 lmax(long a, long b)
 {
 }
 static inline long
 lmax(long a, long b)
 {

-       return (a > b ? a : b);
+       return a > b ? a : b;

 }
 static inline long
 lmin(long a, long b)
 {
 }
 static inline long
 lmin(long a, long b)
 {

-       return (a < b ? a : b);
+       return a < b ? a : b;

 }
 static inline u_int
 max(u_int a, u_int b)
 {
 }
 static inline u_int
 max(u_int a, u_int b)
 {

-       return (a > b ? a : b);
+       return a > b ? a : b;

 }
 static inline u_int
 min(u_int a, u_int b)
 {
 }
 static inline u_int
 min(u_int a, u_int b)
 {

-       return (a < b ? a : b);
+       return a < b ? a : b;

 }
 }

-static inline u_long
-ulmax(u_long a, u_long b)
+static inline u_int32_t
+ulmax(u_int32_t a, u_int32_t b)

 {
 {

-       return (a > b ? a : b);
+       return a > b ? a : b;

 }
 }

-static inline u_long
-ulmin(u_long a, u_long b)
+static inline u_int32_t
+ulmin(u_int32_t a, u_int32_t b)

 {
 {

-       return (a < b ? a : b);
+       return a < b ? a : b;

 }
 
 }
 

+
+

 /* Prototypes for non-quad routines. */
 /* Prototypes for non-quad routines. */

-extern int     ffs(int);
-extern int     locc(int, char *, u_int);
-extern u_long  random(void);
-extern char    *rindex(const char *, int);
-extern int     scanc(u_int, u_char *, const u_char *, int);
-extern int     skpc(int, int, char *);
-extern long    strtol(const char*, char **, int);
-extern u_long  strtoul(const char *, char **, int);
-extern quad_t  strtoq(const char *, char **, int);
+extern int      ffs(unsigned int);
+extern int      ffsll(unsigned long long);
+extern int      fls(unsigned 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 *);
+extern long     strtol(const char*, char **, int);
+extern u_long   strtoul(const char *, char **, int);
+extern quad_t   strtoq(const char *, char **, int);

 extern u_quad_t strtouq(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);
+
+/*
+ * NOTE: snprintf() returns the full length of the formatted string even if it
+ * couldn't fit in the supplied buffer.
+ * Use scnprintf() if you need the actual number of bytes (minus the \0)
+ */
+int     snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
+int     scnprintf(char *, size_t, const char *, ...) __printflike(3, 4);
+
+/* sprintf() is being deprecated. Please use snprintf() instead. */
+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);
+
+#if KERNEL_PRIVATE
+int     _consume_printf_args(int, ...);
+#endif
+
+#if CONFIG_NO_PRINTF_STRINGS
+#if KERNEL_PRIVATE
+#define printf(x, ...)  _consume_printf_args( 0, ## __VA_ARGS__ )
+#else
+#define printf(x, ...)  do {} while (0)
+#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    snprintf(char *, size_t, const char *, ...);
-int    sprintf(char *bufp, const char *, ...);
-int    sscanf(const char *, char const *, ...);
-void printf(const char *, ...);
+#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) OS_WARN_RESULT;
+int     copyoutstr(const void *kaddr, user_addr_t udaddr, size_t len, size_t *done);
+#if XNU_KERNEL_PRIVATE
+int     copyin_atomic32(const user_addr_t user_addr, uint32_t *u32);
+int     copyin_atomic32_wait_if_equals(const user_addr_t user_addr, uint32_t u32);
+int     copyin_atomic64(const user_addr_t user_addr, uint64_t *u64);
+int     copyout_atomic32(uint32_t u32, user_addr_t user_addr);
+int     copyout_atomic64(uint64_t u64, user_addr_t user_addr);
+int     copyoutstr_prevalidate(const void *kaddr, user_addr_t uaddr, size_t len);
+#endif
+
+int vsscanf(const char *, char const *, va_list);

 
 

-uint32_t       crc32(uint32_t crc, const void *bufp, size_t len);
+extern int      vprintf(const char *, va_list) __printflike(1, 0);
+extern int      vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
+extern int      vscnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);

 
 

-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      vprintf_log_locked(const char *, va_list, bool addcr) __printflike(1, 0);
+extern void     osobject_retain(void * object);
+extern void     osobject_release(void * object);
+#endif

 
 

-int vsscanf(const char *, char const *, __darwin_va_list);
-extern int     vsnprintf(char *, size_t, const char *, __darwin_va_list);
-extern int     vsprintf(char *bufp, const char *, __darwin_va_list); 
+/* vsprintf() is being deprecated. Please use vsnprintf() instead. */
+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);
 extern void invalidate_icache(vm_offset_t, unsigned, int);
 extern void flush_dcache(vm_offset_t, unsigned, int);

+#else
+extern void invalidate_icache(vm_offset_t, unsigned, int);
+extern void flush_dcache(vm_offset_t, unsigned, int);
+#endif

 extern void invalidate_icache64(addr64_t, unsigned, int);
 extern void flush_dcache64(addr64_t, unsigned, int);
 
 extern void invalidate_icache64(addr64_t, unsigned, int);
 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_ */
 __END_DECLS
 
 #endif /* _LIBKERN_LIBKERN_H_ */