* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_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
* 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,
* 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_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Version 2.0.
*/
/*
- * HISTORY
+ * HISTORY
* @OSF_COPYRIGHT@
*/
-#ifndef _STRING_H_
-#define _STRING_H_ 1
+#ifndef _STRING_H_
+#define _STRING_H_ 1
#ifdef MACH_KERNEL_PRIVATE
#include <types.h>
#include <sys/types.h>
#endif
+#if defined(KERNEL)
+#include <sys/cdefs.h>
+#endif
+
#ifdef __cplusplus
extern "C" {
#endif
-#ifndef NULL
+#ifndef NULL
#if defined (__cplusplus)
+#if __cplusplus >= 201103L
+#define NULL nullptr
+#else
#define NULL 0
+#endif
#else
#define NULL ((void *)0)
#endif
#endif
-extern void *memcpy(void *, const void *, size_t);
-extern int memcmp(const void *, const void *, size_t);
-extern void *memmove(void *, const void *, size_t);
-extern void *memset(void *, int, size_t);
-extern int memset_s(void *, size_t, int, size_t);
+extern void *memcpy(void *, const void *, size_t);
+extern int memcmp(const void *, const void *, size_t);
+extern void *memmove(void *, const void *, size_t);
+extern void *memset(void *, int, size_t);
+extern int memset_s(void *, size_t, int, size_t);
-extern size_t strlen(const char *);
-extern size_t strnlen(const char *, size_t);
+#ifdef XNU_KERNEL_PRIVATE
+/* memcmp_zero_ptr_aligned() checks string s of n bytes contains all zeros.
+ * Address and size of the string s must be pointer-aligned.
+ * Return 0 if true, 1 otherwise. Also return 0 if n is 0.
+ */
+extern unsigned long memcmp_zero_ptr_aligned(const void *s, size_t n);
+#endif
+
+extern size_t strlen(const char *);
+extern size_t strnlen(const char *, size_t);
-/* strcpy() is being deprecated. Please use strlcpy() instead. */
-extern char *strcpy(char *, const char *) __deprecated;
-extern char *strncpy(char *, const char *, size_t);
+/* strcpy() and strncpy() are deprecated. Please use strlcpy() instead. */
+__kpi_deprecated_arm64_macos_unavailable
+extern char *strcpy(char *, const char *) __deprecated;
-extern size_t strlcat(char *, const char *, size_t);
-extern size_t strlcpy(char *, const char *, size_t);
+__kpi_deprecated_arm64_macos_unavailable
+extern char *strncpy(char *, const char *, size_t);
-/* strcat() is being deprecated. Please use strlcat() instead. */
-extern char *strcat(char *, const char *) __deprecated;
-extern char *strncat(char *, const char *, size_t);
+/* strcat() and strncat() are deprecated. Please use strlcat() instead. */
+__kpi_deprecated_arm64_macos_unavailable
+extern char *strcat(char *, const char *) __deprecated;
-/* strcmp() is being deprecated. Please use strncmp() instead. */
-extern int strcmp(const char *, const char *);
-extern int strncmp(const char *,const char *, size_t);
+__kpi_deprecated_arm64_macos_unavailable
+extern char *strncat(char *, const char *, size_t);
-extern int strcasecmp(const char *s1, const char *s2);
-extern int strncasecmp(const char *s1, const char *s2, size_t n);
-extern char *strnstr(char *s, const char *find, size_t slen);
-extern char *strchr(const char *s, int c);
+extern int strcmp(const char *, const char *);
+extern int strncmp(const char *, const char *, size_t);
+
+extern size_t strlcpy(char *, const char *, size_t);
+extern size_t strlcat(char *, const char *, size_t);
+
+extern int strcasecmp(const char *s1, const char *s2);
+extern int strncasecmp(const char *s1, const char *s2, size_t n);
#ifdef XNU_KERNEL_PRIVATE
-extern char *strrchr(const char *s, int c);
+extern const char *strnstr(const char *s, const char *find, size_t slen);
+#else
+extern char *strnstr(const char *s, const char *find, size_t slen);
#endif
-extern char *STRDUP(const char *, int);
-extern int strprefix(const char *s1, const char *s2);
+extern char *strchr(const char *s, int c);
+#ifdef XNU_KERNEL_PRIVATE
+extern char *strrchr(const char *s, int c);
+#endif
+extern char *STRDUP(const char *, int);
+extern int strprefix(const char *s1, const char *s2);
-extern int bcmp(const void *, const void *, size_t);
-extern void bcopy(const void *, void *, size_t);
-extern void bzero(void *, size_t);
+extern int bcmp(const void *, const void *, size_t);
+extern void bcopy(const void *, void *, size_t);
+extern void bzero(void *, size_t);
+extern int timingsafe_bcmp(const void *b1, const void *b2, size_t n);
#ifdef PRIVATE
#include <san/memintrinsics.h>
#endif
+#if __has_builtin(__builtin_dynamic_object_size)
+#define XNU_BOS __builtin_dynamic_object_size
+#else
+#define XNU_BOS __builtin_object_size
+#endif
+
+
+/* __nochk_ functions for opting out of type 1 bounds checking */
+__attribute__((always_inline)) static inline void *
+__nochk_memcpy(void *dest, const void *src, size_t len)
+{
+ return __builtin___memcpy_chk(dest, src, len, XNU_BOS(dest, 0));
+}
+__attribute__((always_inline)) static inline void *
+__nochk_memmove(void *dest, const void *src, size_t len)
+{
+ return __builtin___memmove_chk(dest, src, len, XNU_BOS(dest, 0));
+}
+__attribute__((always_inline)) static inline void
+__nochk_bcopy(const void *src, void *dest, size_t len)
+{
+ __builtin___memmove_chk(dest, src, len, XNU_BOS(dest, 0));
+}
+
#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_13
/* older deployment target */
#elif defined(KASAN) || (defined (_FORTIFY_SOURCE) && _FORTIFY_SOURCE == 0)
-/* FORTIFY_SOURCE disabled */
+/* _FORTIFY_SOURCE disabled */
#else /* _chk macros */
+
+#if defined XNU_KERNEL_PRIVATE || defined(_FORTIFY_SOURCE_STRICT)
+/* Stricter checking is optional for kexts. When type is set to 1, __builtin_object_size
+ * returns the size of the closest surrounding sub-object, which would detect copying past
+ * the end of a struct member. */
+#define BOS_COPY_TYPE 1
+#else
+#define BOS_COPY_TYPE 0
+#endif
+
#if __has_builtin(__builtin___memcpy_chk)
-#define memcpy(dest, src, len) __builtin___memcpy_chk(dest, src, len, __builtin_object_size(dest, 0))
+#define memcpy(dest, src, len) __builtin___memcpy_chk(dest, src, len, XNU_BOS(dest, BOS_COPY_TYPE))
#endif
#if __has_builtin(__builtin___memmove_chk)
-#define memmove(dest, src, len) __builtin___memmove_chk(dest, src, len, __builtin_object_size(dest, 0))
+#define memmove(dest, src, len) __builtin___memmove_chk(dest, src, len, XNU_BOS(dest, BOS_COPY_TYPE))
#endif
#if __has_builtin(__builtin___strncpy_chk)
-#define strncpy(dest, src, len) __builtin___strncpy_chk(dest, src, len, __builtin_object_size(dest, 1))
+#define strncpy(dest, src, len) __builtin___strncpy_chk(dest, src, len, XNU_BOS(dest, 1))
#endif
#if __has_builtin(__builtin___strncat_chk)
-#define strncat(dest, src, len) __builtin___strncat_chk(dest, src, len, __builtin_object_size(dest, 1))
+#define strncat(dest, src, len) __builtin___strncat_chk(dest, src, len, XNU_BOS(dest, 1))
#endif
#if __has_builtin(__builtin___strlcat_chk)
-#define strlcat(dest, src, len) __builtin___strlcat_chk(dest, src, len, __builtin_object_size(dest, 1))
+#define strlcat(dest, src, len) __builtin___strlcat_chk(dest, src, len, XNU_BOS(dest, 1))
#endif
#if __has_builtin(__builtin___strlcpy_chk)
-#define strlcpy(dest, src, len) __builtin___strlcpy_chk(dest, src, len, __builtin_object_size(dest, 1))
+#define strlcpy(dest, src, len) __builtin___strlcpy_chk(dest, src, len, XNU_BOS(dest, 1))
#endif
#if __has_builtin(__builtin___strcpy_chk)
-#define strcpy(dest, src, len) __builtin___strcpy_chk(dest, src, __builtin_object_size(dest, 1))
+#define strcpy(dest, src, len) __builtin___strcpy_chk(dest, src, XNU_BOS(dest, 1))
#endif
#if __has_builtin(__builtin___strcat_chk)
-#define strcat(dest, src) __builtin___strcat_chk(dest, src, __builtin_object_size(dest, 1))
+#define strcat(dest, src) __builtin___strcat_chk(dest, src, XNU_BOS(dest, 1))
#endif
#if __has_builtin(__builtin___memmove_chk)
-#define bcopy(src, dest, len) __builtin___memmove_chk(dest, src, len, __builtin_object_size(dest, 0))
+#define bcopy(src, dest, len) __builtin___memmove_chk(dest, src, len, XNU_BOS(dest, BOS_COPY_TYPE))
#endif
#endif /* _chk macros */
}
#endif
-#endif /* _STRING_H_ */
+#endif /* _STRING_H_ */
projects / apple / xnu.git / blobdiff