272 lines
9.5 KiB
C
272 lines
9.5 KiB
C
/*
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* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)libkern.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
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* support for mandatory and extensible security protections. This notice
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* is included in support of clause 2.2 (b) of the Apple Public License,
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* Version 2.0.
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*/
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#ifndef _LIBKERN_LIBKERN_H_
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#define _LIBKERN_LIBKERN_H_
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#include <sys/appleapiopts.h>
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#include <stdint.h>
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#include <stdarg.h> /* for platform-specific va_list */
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#include <string.h>
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#include <machine/limits.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <mach/vm_param.h>
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#include <libkern/crc.h>
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#include <libkern/copyio.h>
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#if defined(__arm__) || defined(__arm64__)
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#include <arm/arch.h> /* for _ARM_ARCH_* */
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#endif
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#ifdef __APPLE_API_OBSOLETE
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/* BCD conversions. */
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extern u_char const bcd2bin_data[];
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extern u_char const bin2bcd_data[];
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#define bcd2bin(bcd) (bcd2bin_data[bcd])
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#define bin2bcd(bin) (bin2bcd_data[bin])
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#endif /* __APPLE_API_OBSOLETE */
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#ifdef __APPLE_API_PRIVATE
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extern char const hex2ascii_data[];
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#define hex2ascii(hex) (hex2ascii_data[hex])
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#endif /* __APPLE_API_PRIVATE */
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__BEGIN_DECLS
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static inline int
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imax(int a, int b)
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{
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return a > b ? a : b;
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}
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static inline int
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imin(int a, int b)
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{
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return a < b ? a : b;
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}
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static inline long
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lmax(long a, long b)
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{
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return a > b ? a : b;
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}
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static inline long
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lmin(long a, long b)
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{
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return a < b ? a : b;
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}
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static inline u_int
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max(u_int a, u_int b)
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{
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return a > b ? a : b;
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}
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static inline u_int
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min(u_int a, u_int b)
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{
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return a < b ? a : b;
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}
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static inline u_int32_t
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ulmax(u_int32_t a, u_int32_t b)
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{
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return a > b ? a : b;
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}
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static inline u_int32_t
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ulmin(u_int32_t a, u_int32_t b)
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{
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return a < b ? a : b;
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}
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/* Prototypes for non-quad routines. */
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extern int ffs(unsigned int);
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extern int ffsll(unsigned long long);
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extern int fls(unsigned int);
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extern int flsll(unsigned long long);
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extern u_int32_t random(void);
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extern size_t scanc(size_t, u_char *, const u_char *, u_char);
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extern long strtol(const char*, char **, int);
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extern u_long strtoul(const char *, char **, int);
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extern quad_t strtoq(const char *, char **, int);
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extern u_quad_t strtouq(const char *, char **, int);
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extern char *strsep(char **, const char *);
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extern void *memchr(const void *, int, size_t);
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extern void url_decode(char *str);
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/*
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* NOTE: snprintf() returns the full length of the formatted string even if it
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* couldn't fit in the supplied buffer.
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* Use scnprintf() if you need the actual number of bytes (minus the \0)
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*/
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int snprintf(char *__counted_by(count), size_t count, const char *, ...) __printflike(3, 4);
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int scnprintf(char *__counted_by(count), size_t count, const char *, ...) __printflike(3, 4);
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/*
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* Like (v)snprintf, but returns a __null_terminated pointer to `dst` (or NULL
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* if `count` was 0). This can be used to "finalize" editing a char array and
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* turn it into a NUL-terminated string when -fbounds-safety is enabled.
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* Care must be taken to avoid aliasing the character data after the string
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* has been finalized.
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*/
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const char *
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tsnprintf(char *__counted_by(count) dst, size_t count, const char *fmt, ...) __printflike(3, 4);
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const char *
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vtsnprintf(char *__counted_by(count) dst, size_t count, const char *fmt, va_list ap) __printflike(3, 0);
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/* sprintf() is being deprecated. Please use snprintf() instead. */
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int sprintf(char *bufp, const char *, ...) __deprecated __printflike(2, 3);
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int sscanf(const char *, char const *, ...) __scanflike(2, 3);
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int printf(const char *, ...) __printflike(1, 2);
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#if KERNEL_PRIVATE
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int _consume_printf_args(int, ...);
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#endif
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#if CONFIG_NO_PRINTF_STRINGS
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#if KERNEL_PRIVATE
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#define printf(x, ...) _consume_printf_args( 0, ## __VA_ARGS__ )
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#else
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#define printf(x, ...) do {} while (0)
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#endif
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#endif
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uint32_t crc32(uint32_t crc, const void *bufp, size_t len);
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int copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done);
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int copyinstr(const user_addr_t uaddr, void *kaddr, size_t len, size_t *done) OS_WARN_RESULT;
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int copyoutstr(const void *kaddr, user_addr_t udaddr, size_t len, size_t *done);
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#if XNU_KERNEL_PRIVATE
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int copyin_atomic32(const user_addr_t user_addr, uint32_t *u32);
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int copyin_atomic32_wait_if_equals(const user_addr_t user_addr, uint32_t u32);
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int copyin_atomic64(const user_addr_t user_addr, uint64_t *u64);
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int copyout_atomic32(uint32_t u32, user_addr_t user_addr);
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int copyout_atomic64(uint64_t u64, user_addr_t user_addr);
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int copyoutstr_prevalidate(const void *kaddr, user_addr_t uaddr, size_t len);
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#endif
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int vsscanf(const char *, char const *, va_list);
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extern int vprintf(const char *, va_list) __printflike(1, 0);
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extern int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
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extern int vscnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
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#if XNU_KERNEL_PRIVATE
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extern bool printf_log_locked(bool addcr, const char*, ...) __printflike(2, 3);
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extern bool vprintf_log_locked(const char *, va_list, bool driverkit) __printflike(1, 0);
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extern void osobject_retain(void * object);
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extern void osobject_release(void * object);
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#endif
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/* vsprintf() is being deprecated. Please use vsnprintf() instead. */
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extern int vsprintf(char *bufp, const char *, va_list) __deprecated __printflike(2, 0);
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#ifdef KERNEL_PRIVATE
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#ifdef __arm__
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void flush_inner_dcaches(void);
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void clean_inner_dcaches(void);
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#endif
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extern void invalidate_icache(vm_offset_t, unsigned, int);
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extern void flush_dcache(vm_offset_t, unsigned, int);
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#else
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extern void invalidate_icache(vm_offset_t, unsigned, int);
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extern void flush_dcache(vm_offset_t, unsigned, int);
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#endif
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extern void invalidate_icache64(addr64_t, unsigned, int);
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extern void flush_dcache64(addr64_t, unsigned, int);
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static inline int
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clz(unsigned int num)
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{
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#if (__arm__ || __arm64__)
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// On ARM, clz(0) is defined to return number of bits in the input type
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return __builtin_clz(num);
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#else
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// On Intel, clz(0) is undefined
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return num ? __builtin_clz(num) : sizeof(num) * CHAR_BIT;
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#endif
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}
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#if XNU_KERNEL_PRIVATE
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/*
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* Define a function that for whatever reason needs to exist, but must never be
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* called.
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*/
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#define UNSUPPORTED_API(funcname, ...) \
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_Pragma("clang diagnostic push") \
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_Pragma("clang diagnostic ignored \"-Wunused-parameter\"") \
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funcname(__VA_ARGS__) { panic("%s: unsupported API", __func__); } \
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_Pragma("clang diagnostic pop")
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#endif
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__END_DECLS
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#endif /* _LIBKERN_LIBKERN_H_ */
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