[mirror_ubuntu-artful-kernel.git] / include / linux / string.h

#ifndef _LINUX_STRING_H_
#define _LINUX_STRING_H_


#include <linux/compiler.h>	/* for inline */
#include <linux/types.h>	/* for size_t */
#include <linux/stddef.h>	/* for NULL */
#include <stdarg.h>
#include <uapi/linux/string.h>

extern char *strndup_user(const char __user *, long);
extern void *memdup_user(const void __user *, size_t);
extern void *memdup_user_nul(const void __user *, size_t);

/*
 * Include machine specific inline routines
 */
#include <asm/string.h>

#ifndef __HAVE_ARCH_STRCPY
extern char * strcpy(char *,const char *);
#endif
#ifndef __HAVE_ARCH_STRNCPY
extern char * strncpy(char *,const char *, __kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRLCPY
size_t strlcpy(char *, const char *, size_t);
#endif
#ifndef __HAVE_ARCH_STRSCPY
ssize_t __must_check strscpy(char *, const char *, size_t);
#endif
#ifndef __HAVE_ARCH_STRCAT
extern char * strcat(char *, const char *);
#endif
#ifndef __HAVE_ARCH_STRNCAT
extern char * strncat(char *, const char *, __kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRLCAT
extern size_t strlcat(char *, const char *, __kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRCMP
extern int strcmp(const char *,const char *);
#endif
#ifndef __HAVE_ARCH_STRNCMP
extern int strncmp(const char *,const char *,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRCASECMP
extern int strcasecmp(const char *s1, const char *s2);
#endif
#ifndef __HAVE_ARCH_STRNCASECMP
extern int strncasecmp(const char *s1, const char *s2, size_t n);
#endif
#ifndef __HAVE_ARCH_STRCHR
extern char * strchr(const char *,int);
#endif
#ifndef __HAVE_ARCH_STRCHRNUL
extern char * strchrnul(const char *,int);
#endif
#ifndef __HAVE_ARCH_STRNCHR
extern char * strnchr(const char *, size_t, int);
#endif
#ifndef __HAVE_ARCH_STRRCHR
extern char * strrchr(const char *,int);
#endif
extern char * __must_check skip_spaces(const char *);

extern char *strim(char *);

static inline __must_check char *strstrip(char *str)
{
	return strim(str);
}

#ifndef __HAVE_ARCH_STRSTR
extern char * strstr(const char *, const char *);
#endif
#ifndef __HAVE_ARCH_STRNSTR
extern char * strnstr(const char *, const char *, size_t);
#endif
#ifndef __HAVE_ARCH_STRLEN
extern __kernel_size_t strlen(const char *);
#endif
#ifndef __HAVE_ARCH_STRNLEN
extern __kernel_size_t strnlen(const char *,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRPBRK
extern char * strpbrk(const char *,const char *);
#endif
#ifndef __HAVE_ARCH_STRSEP
extern char * strsep(char **,const char *);
#endif
#ifndef __HAVE_ARCH_STRSPN
extern __kernel_size_t strspn(const char *,const char *);
#endif
#ifndef __HAVE_ARCH_STRCSPN
extern __kernel_size_t strcspn(const char *,const char *);
#endif

#ifndef __HAVE_ARCH_MEMSET
extern void * memset(void *,int,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_MEMCPY
extern void * memcpy(void *,const void *,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_MEMMOVE
extern void * memmove(void *,const void *,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_MEMSCAN
extern void * memscan(void *,int,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_MEMCMP
extern int memcmp(const void *,const void *,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_MEMCHR
extern void * memchr(const void *,int,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_MEMCPY_MCSAFE
static inline __must_check int memcpy_mcsafe(void *dst, const void *src,
		size_t cnt)
{
	memcpy(dst, src, cnt);
	return 0;
}
#endif
#ifndef __HAVE_ARCH_MEMCPY_FLUSHCACHE
static inline void memcpy_flushcache(void *dst, const void *src, size_t cnt)
{
	memcpy(dst, src, cnt);
}
#endif
void *memchr_inv(const void *s, int c, size_t n);
char *strreplace(char *s, char old, char new);

extern void kfree_const(const void *x);

extern char *kstrdup(const char *s, gfp_t gfp) __malloc;
extern const char *kstrdup_const(const char *s, gfp_t gfp);
extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
extern char *kmemdup_nul(const char *s, size_t len, gfp_t gfp);

extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
extern void argv_free(char **argv);

extern bool sysfs_streq(const char *s1, const char *s2);
extern int kstrtobool(const char *s, bool *res);
static inline int strtobool(const char *s, bool *res)
{
	return kstrtobool(s, res);
}

int match_string(const char * const *array, size_t n, const char *string);
int __sysfs_match_string(const char * const *array, size_t n, const char *s);

/**
 * sysfs_match_string - matches given string in an array
 * @_a: array of strings
 * @_s: string to match with
 *
 * Helper for __sysfs_match_string(). Calculates the size of @a automatically.
 */
#define sysfs_match_string(_a, _s) __sysfs_match_string(_a, ARRAY_SIZE(_a), _s)

#ifdef CONFIG_BINARY_PRINTF
int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
#endif

extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
				       const void *from, size_t available);

/**
 * strstarts - does @str start with @prefix?
 * @str: string to examine
 * @prefix: prefix to look for.
 */
static inline bool strstarts(const char *str, const char *prefix)
{
	return strncmp(str, prefix, strlen(prefix)) == 0;
}

size_t memweight(const void *ptr, size_t bytes);
void memzero_explicit(void *s, size_t count);

/**
 * kbasename - return the last part of a pathname.
 *
 * @path: path to extract the filename from.
 */
static inline const char *kbasename(const char *path)
{
	const char *tail = strrchr(path, '/');
	return tail ? tail + 1 : path;
}

#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
#define __RENAME(x) __asm__(#x)

void fortify_panic(const char *name) __noreturn __cold;
void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");

#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
__FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (__builtin_constant_p(size) && p_size < size)
		__write_overflow();
	if (p_size < size)
		fortify_panic(__func__);
	return __builtin_strncpy(p, q, size);
}

__FORTIFY_INLINE char *strcat(char *p, const char *q)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (p_size == (size_t)-1)
		return __builtin_strcat(p, q);
	if (strlcat(p, q, p_size) >= p_size)
		fortify_panic(__func__);
	return p;
}

__FORTIFY_INLINE __kernel_size_t strlen(const char *p)
{
	__kernel_size_t ret;
	size_t p_size = __builtin_object_size(p, 0);
	if (p_size == (size_t)-1)
		return __builtin_strlen(p);
	ret = strnlen(p, p_size);
	if (p_size <= ret)
		fortify_panic(__func__);
	return ret;
}

extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
__FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
{
	size_t p_size = __builtin_object_size(p, 0);
	__kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
	if (p_size <= ret && maxlen != ret)
		fortify_panic(__func__);
	return ret;
}

/* defined after fortified strlen to reuse it */
extern size_t __real_strlcpy(char *, const char *, size_t) __RENAME(strlcpy);
__FORTIFY_INLINE size_t strlcpy(char *p, const char *q, size_t size)
{
	size_t ret;
	size_t p_size = __builtin_object_size(p, 0);
	size_t q_size = __builtin_object_size(q, 0);
	if (p_size == (size_t)-1 && q_size == (size_t)-1)
		return __real_strlcpy(p, q, size);
	ret = strlen(q);
	if (size) {
		size_t len = (ret >= size) ? size - 1 : ret;
		if (__builtin_constant_p(len) && len >= p_size)
			__write_overflow();
		if (len >= p_size)
			fortify_panic(__func__);
		__builtin_memcpy(p, q, len);
		p[len] = '\0';
	}
	return ret;
}

/* defined after fortified strlen and strnlen to reuse them */
__FORTIFY_INLINE char *strncat(char *p, const char *q, __kernel_size_t count)
{
	size_t p_len, copy_len;
	size_t p_size = __builtin_object_size(p, 0);
	size_t q_size = __builtin_object_size(q, 0);
	if (p_size == (size_t)-1 && q_size == (size_t)-1)
		return __builtin_strncat(p, q, count);
	p_len = strlen(p);
	copy_len = strnlen(q, count);
	if (p_size < p_len + copy_len + 1)
		fortify_panic(__func__);
	__builtin_memcpy(p + p_len, q, copy_len);
	p[p_len + copy_len] = '\0';
	return p;
}

__FORTIFY_INLINE void *memset(void *p, int c, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (__builtin_constant_p(size) && p_size < size)
		__write_overflow();
	if (p_size < size)
		fortify_panic(__func__);
	return __builtin_memset(p, c, size);
}

__FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	size_t q_size = __builtin_object_size(q, 0);
	if (__builtin_constant_p(size)) {
		if (p_size < size)
			__write_overflow();
		if (q_size < size)
			__read_overflow2();
	}
	if (p_size < size || q_size < size)
		fortify_panic(__func__);
	return __builtin_memcpy(p, q, size);
}

__FORTIFY_INLINE void *memmove(void *p, const void *q, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	size_t q_size = __builtin_object_size(q, 0);
	if (__builtin_constant_p(size)) {
		if (p_size < size)
			__write_overflow();
		if (q_size < size)
			__read_overflow2();
	}
	if (p_size < size || q_size < size)
		fortify_panic(__func__);
	return __builtin_memmove(p, q, size);
}

extern void *__real_memscan(void *, int, __kernel_size_t) __RENAME(memscan);
__FORTIFY_INLINE void *memscan(void *p, int c, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (__builtin_constant_p(size) && p_size < size)
		__read_overflow();
	if (p_size < size)
		fortify_panic(__func__);
	return __real_memscan(p, c, size);
}

__FORTIFY_INLINE int memcmp(const void *p, const void *q, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	size_t q_size = __builtin_object_size(q, 0);
	if (__builtin_constant_p(size)) {
		if (p_size < size)
			__read_overflow();
		if (q_size < size)
			__read_overflow2();
	}
	if (p_size < size || q_size < size)
		fortify_panic(__func__);
	return __builtin_memcmp(p, q, size);
}

__FORTIFY_INLINE void *memchr(const void *p, int c, __kernel_size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (__builtin_constant_p(size) && p_size < size)
		__read_overflow();
	if (p_size < size)
		fortify_panic(__func__);
	return __builtin_memchr(p, c, size);
}

void *__real_memchr_inv(const void *s, int c, size_t n) __RENAME(memchr_inv);
__FORTIFY_INLINE void *memchr_inv(const void *p, int c, size_t size)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (__builtin_constant_p(size) && p_size < size)
		__read_overflow();
	if (p_size < size)
		fortify_panic(__func__);
	return __real_memchr_inv(p, c, size);
}

extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup);
__FORTIFY_INLINE void *kmemdup(const void *p, size_t size, gfp_t gfp)
{
	size_t p_size = __builtin_object_size(p, 0);
	if (__builtin_constant_p(size) && p_size < size)
		__read_overflow();
	if (p_size < size)
		fortify_panic(__func__);
	return __real_kmemdup(p, size, gfp);
}

/* defined after fortified strlen and memcpy to reuse them */
__FORTIFY_INLINE char *strcpy(char *p, const char *q)
{
	size_t p_size = __builtin_object_size(p, 0);
	size_t q_size = __builtin_object_size(q, 0);
	if (p_size == (size_t)-1 && q_size == (size_t)-1)
		return __builtin_strcpy(p, q);
	memcpy(p, q, strlen(q) + 1);
	return p;
}

#endif

#endif /* _LINUX_STRING_H_ */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_STRING_H_
	2	#define _LINUX_STRING_H_
	3
1da177e4 LT	4
	5	#include <linux/compiler.h> /* for inline */
	6	#include <linux/types.h> /* for size_t */
	7	#include <linux/stddef.h> /* for NULL */
4370aa4a	8	#include <stdarg.h>
607ca46e	9	#include <uapi/linux/string.h>
1da177e4	10
96840aa0	11	extern char strndup_user(const char __user , long);
610a77e0	12	extern void memdup_user(const void __user , size_t);
e9d408e1	13	extern void memdup_user_nul(const void __user , size_t);
96840aa0	14
1da177e4 LT	15	/*
	16	* Include machine specific inline routines
	17	*/
	18	#include <asm/string.h>
	19
	20	#ifndef __HAVE_ARCH_STRCPY
	21	extern char * strcpy(char ,const char );
	22	#endif
	23	#ifndef __HAVE_ARCH_STRNCPY
	24	extern char * strncpy(char ,const char , __kernel_size_t);
	25	#endif
	26	#ifndef __HAVE_ARCH_STRLCPY
	27	size_t strlcpy(char , const char , size_t);
	28	#endif
30035e45 CM	29	#ifndef __HAVE_ARCH_STRSCPY
	30	ssize_t __must_check strscpy(char , const char , size_t);
	31	#endif
1da177e4 LT	32	#ifndef __HAVE_ARCH_STRCAT
	33	extern char * strcat(char , const char );
	34	#endif
	35	#ifndef __HAVE_ARCH_STRNCAT
	36	extern char * strncat(char , const char , __kernel_size_t);
	37	#endif
	38	#ifndef __HAVE_ARCH_STRLCAT
	39	extern size_t strlcat(char , const char , __kernel_size_t);
	40	#endif
	41	#ifndef __HAVE_ARCH_STRCMP
	42	extern int strcmp(const char ,const char );
	43	#endif
	44	#ifndef __HAVE_ARCH_STRNCMP
	45	extern int strncmp(const char ,const char ,__kernel_size_t);
	46	#endif
ded220bd DM	47	#ifndef __HAVE_ARCH_STRCASECMP
	48	extern int strcasecmp(const char s1, const char s2);
	49	#endif
	50	#ifndef __HAVE_ARCH_STRNCASECMP
	51	extern int strncasecmp(const char s1, const char s2, size_t n);
	52	#endif
1da177e4 LT	53	#ifndef __HAVE_ARCH_STRCHR
	54	extern char * strchr(const char *,int);
	55	#endif
11d200e9 GL	56	#ifndef __HAVE_ARCH_STRCHRNUL
	57	extern char * strchrnul(const char *,int);
	58	#endif
1da177e4 LT	59	#ifndef __HAVE_ARCH_STRNCHR
	60	extern char * strnchr(const char *, size_t, int);
	61	#endif
	62	#ifndef __HAVE_ARCH_STRRCHR
	63	extern char * strrchr(const char *,int);
	64	#endif
f653398c	65	extern char * __must_check skip_spaces(const char *);
ca54cb8c KM	66
	67	extern char strim(char );
	68
	69	static inline __must_check char strstrip(char str)
	70	{
	71	return strim(str);
	72	}
	73
1da177e4	74	#ifndef __HAVE_ARCH_STRSTR
d5f1fb53 LZ	75	extern char * strstr(const char , const char );
	76	#endif
	77	#ifndef __HAVE_ARCH_STRNSTR
	78	extern char * strnstr(const char , const char , size_t);
1da177e4 LT	79	#endif
	80	#ifndef __HAVE_ARCH_STRLEN
	81	extern __kernel_size_t strlen(const char *);
	82	#endif
	83	#ifndef __HAVE_ARCH_STRNLEN
	84	extern __kernel_size_t strnlen(const char *,__kernel_size_t);
	85	#endif
8833d328 KM	86	#ifndef __HAVE_ARCH_STRPBRK
	87	extern char * strpbrk(const char ,const char );
	88	#endif
	89	#ifndef __HAVE_ARCH_STRSEP
	90	extern char * strsep(char *,const char );
	91	#endif
	92	#ifndef __HAVE_ARCH_STRSPN
	93	extern __kernel_size_t strspn(const char ,const char );
	94	#endif
	95	#ifndef __HAVE_ARCH_STRCSPN
	96	extern __kernel_size_t strcspn(const char ,const char );
	97	#endif
1da177e4 LT	98
	99	#ifndef __HAVE_ARCH_MEMSET
	100	extern void * memset(void *,int,__kernel_size_t);
	101	#endif
	102	#ifndef __HAVE_ARCH_MEMCPY
	103	extern void * memcpy(void ,const void ,__kernel_size_t);
	104	#endif
	105	#ifndef __HAVE_ARCH_MEMMOVE
	106	extern void * memmove(void ,const void ,__kernel_size_t);
	107	#endif
	108	#ifndef __HAVE_ARCH_MEMSCAN
	109	extern void * memscan(void *,int,__kernel_size_t);
	110	#endif
	111	#ifndef __HAVE_ARCH_MEMCMP
	112	extern int memcmp(const void ,const void ,__kernel_size_t);
	113	#endif
	114	#ifndef __HAVE_ARCH_MEMCHR
	115	extern void * memchr(const void *,int,__kernel_size_t);
	116	#endif
6abccd1b DW	117	#ifndef __HAVE_ARCH_MEMCPY_MCSAFE
	118	static inline __must_check int memcpy_mcsafe(void dst, const void src,
	119	size_t cnt)
	120	{
	121	memcpy(dst, src, cnt);
	122	return 0;
	123	}
	124	#endif
0aed55af DW	125	#ifndef __HAVE_ARCH_MEMCPY_FLUSHCACHE
	126	static inline void memcpy_flushcache(void dst, const void src, size_t cnt)
	127	{
	128	memcpy(dst, src, cnt);
	129	}
	130	#endif
79824820	131	void memchr_inv(const void s, int c, size_t n);
94df2904	132	char strreplace(char s, char old, char new);
1da177e4	133
a4bb1e43 AH	134	extern void kfree_const(const void *x);
a4bb1e43 AH	135
48a27055	136	extern char kstrdup(const char s, gfp_t gfp) __malloc;
a4bb1e43	137	extern const char kstrdup_const(const char s, gfp_t gfp);
1e66df3e	138	extern char kstrndup(const char s, size_t len, gfp_t gfp);
1a2f67b4	139	extern void kmemdup(const void src, size_t len, gfp_t gfp);
f3515741	140	extern char kmemdup_nul(const char s, size_t len, gfp_t gfp);
543537bd	141
d84d1cc7 JF	142	extern char *argv_split(gfp_t gfp, const char str, int *argcp);
	143	extern void argv_free(char **argv);
	144
34990cf7	145	extern bool sysfs_streq(const char s1, const char s2);
ef951599 KC	146	extern int kstrtobool(const char s, bool res);
	147	static inline int strtobool(const char s, bool res)
	148	{
	149	return kstrtobool(s, res);
	150	}
34990cf7	151
56b06081	152	int match_string(const char * const array, size_t n, const char string);
e1fe7b6a HK	153	int __sysfs_match_string(const char * const array, size_t n, const char s);
	154
	155	/**
	156	* sysfs_match_string - matches given string in an array
	157	* @_a: array of strings
	158	* @_s: string to match with
	159	*
	160	* Helper for __sysfs_match_string(). Calculates the size of @a automatically.
	161	*/
	162	#define sysfs_match_string(_a, _s) __sysfs_match_string(_a, ARRAY_SIZE(_a), _s)
56b06081	163
4370aa4a LJ	164	#ifdef CONFIG_BINARY_PRINTF
	165	int vbin_printf(u32 bin_buf, size_t size, const char fmt, va_list args);
	166	int bstr_printf(char buf, size_t size, const char fmt, const u32 *bin_buf);
	167	int bprintf(u32 bin_buf, size_t size, const char fmt, ...) __printf(3, 4);
	168	#endif
	169
e108526e	170	extern ssize_t memory_read_from_buffer(void to, size_t count, loff_t ppos,
d4c5efdb	171	const void *from, size_t available);
e108526e	172
66f92cf9 RR	173	/**
	174	* strstarts - does @str start with @prefix?
	175	* @str: string to examine
	176	* @prefix: prefix to look for.
	177	*/
	178	static inline bool strstarts(const char str, const char prefix)
	179	{
	180	return strncmp(str, prefix, strlen(prefix)) == 0;
	181	}
639b9e34	182
d4c5efdb DB	183	size_t memweight(const void *ptr, size_t bytes);
d4c5efdb DB	184	void memzero_explicit(void *s, size_t count);
639b9e34	185
b18888ab AS	186	/**
	187	* kbasename - return the last part of a pathname.
	188	*
	189	* @path: path to extract the filename from.
	190	*/
	191	static inline const char kbasename(const char path)
	192	{
	193	const char *tail = strrchr(path, '/');
	194	return tail ? tail + 1 : path;
	195	}
	196
6974f0c4 DM	197	#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
	198	#define __RENAME(x) __asm__(#x)
	199
	200	void fortify_panic(const char *name) __noreturn __cold;
	201	void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
	202	void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
	203	void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
	204
	205	#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
6974f0c4 DM	206	__FORTIFY_INLINE char strncpy(char p, const char *q, __kernel_size_t size)
	207	{
	208	size_t p_size = __builtin_object_size(p, 0);
	209	if (__builtin_constant_p(size) && p_size < size)
	210	__write_overflow();
	211	if (p_size < size)
	212	fortify_panic(__func__);
	213	return __builtin_strncpy(p, q, size);
	214	}
	215
	216	__FORTIFY_INLINE char strcat(char p, const char *q)
	217	{
	218	size_t p_size = __builtin_object_size(p, 0);
	219	if (p_size == (size_t)-1)
	220	return __builtin_strcat(p, q);
	221	if (strlcat(p, q, p_size) >= p_size)
	222	fortify_panic(__func__);
	223	return p;
	224	}
	225
	226	__FORTIFY_INLINE __kernel_size_t strlen(const char *p)
	227	{
	228	__kernel_size_t ret;
	229	size_t p_size = __builtin_object_size(p, 0);
	230	if (p_size == (size_t)-1)
	231	return __builtin_strlen(p);
	232	ret = strnlen(p, p_size);
	233	if (p_size <= ret)
	234	fortify_panic(__func__);
	235	return ret;
	236	}
	237
	238	extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
	239	__FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
	240	{
	241	size_t p_size = __builtin_object_size(p, 0);
	242	__kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
	243	if (p_size <= ret && maxlen != ret)
	244	fortify_panic(__func__);
	245	return ret;
	246	}
	247
	248	/* defined after fortified strlen to reuse it */
	249	extern size_t __real_strlcpy(char , const char , size_t) __RENAME(strlcpy);
	250	__FORTIFY_INLINE size_t strlcpy(char p, const char q, size_t size)
	251	{
	252	size_t ret;
	253	size_t p_size = __builtin_object_size(p, 0);
	254	size_t q_size = __builtin_object_size(q, 0);
	255	if (p_size == (size_t)-1 && q_size == (size_t)-1)
	256	return __real_strlcpy(p, q, size);
	257	ret = strlen(q);
	258	if (size) {
	259	size_t len = (ret >= size) ? size - 1 : ret;
	260	if (__builtin_constant_p(len) && len >= p_size)
	261	__write_overflow();
	262	if (len >= p_size)
	263	fortify_panic(__func__);
	264	__builtin_memcpy(p, q, len);
	265	p[len] = '\0';
	266	}
	267	return ret;
	268	}
	269
270	/* defined after fortified strlen and strnlen to reuse them */
271	__FORTIFY_INLINE char strncat(char p, const char *q, __kernel_size_t count)
272	{
273	size_t p_len, copy_len;
274	size_t p_size = __builtin_object_size(p, 0);
275	size_t q_size = __builtin_object_size(q, 0);
276	if (p_size == (size_t)-1 && q_size == (size_t)-1)
277	return __builtin_strncat(p, q, count);
278	p_len = strlen(p);
279	copy_len = strnlen(q, count);
280	if (p_size < p_len + copy_len + 1)
281	fortify_panic(__func__);
282	__builtin_memcpy(p + p_len, q, copy_len);
283	p[p_len + copy_len] = '\0';
284	return p;
285	}
286
287	__FORTIFY_INLINE void memset(void p, int c, __kernel_size_t size)
288	{
289	size_t p_size = __builtin_object_size(p, 0);
290	if (__builtin_constant_p(size) && p_size < size)
291	__write_overflow();
292	if (p_size < size)
293	fortify_panic(__func__);
294	return __builtin_memset(p, c, size);
295	}
296
297	__FORTIFY_INLINE void memcpy(void p, const void *q, __kernel_size_t size)
298	{
299	size_t p_size = __builtin_object_size(p, 0);
300	size_t q_size = __builtin_object_size(q, 0);
301	if (__builtin_constant_p(size)) {
302	if (p_size < size)
303	__write_overflow();
304	if (q_size < size)
305	__read_overflow2();
306	}
307	if (p_size < size \|\| q_size < size)
308	fortify_panic(__func__);
309	return __builtin_memcpy(p, q, size);
310	}
311
312	__FORTIFY_INLINE void memmove(void p, const void *q, __kernel_size_t size)
313	{
314	size_t p_size = __builtin_object_size(p, 0);
315	size_t q_size = __builtin_object_size(q, 0);
316	if (__builtin_constant_p(size)) {
317	if (p_size < size)
318	__write_overflow();
319	if (q_size < size)
320	__read_overflow2();
321	}
322	if (p_size < size \|\| q_size < size)
323	fortify_panic(__func__);
324	return __builtin_memmove(p, q, size);
325	}
326
327	extern void __real_memscan(void , int, __kernel_size_t) __RENAME(memscan);
328	__FORTIFY_INLINE void memscan(void p, int c, __kernel_size_t size)
329	{
330	size_t p_size = __builtin_object_size(p, 0);
331	if (__builtin_constant_p(size) && p_size < size)
332	__read_overflow();
333	if (p_size < size)
334	fortify_panic(__func__);
335	return __real_memscan(p, c, size);
336	}
337
338	__FORTIFY_INLINE int memcmp(const void p, const void q, __kernel_size_t size)
339	{
340	size_t p_size = __builtin_object_size(p, 0);
341	size_t q_size = __builtin_object_size(q, 0);
342	if (__builtin_constant_p(size)) {
343	if (p_size < size)
344	__read_overflow();
345	if (q_size < size)
346	__read_overflow2();
347	}
348	if (p_size < size \|\| q_size < size)
349	fortify_panic(__func__);
350	return __builtin_memcmp(p, q, size);
351	}
352
353	__FORTIFY_INLINE void memchr(const void p, int c, __kernel_size_t size)
354	{
355	size_t p_size = __builtin_object_size(p, 0);
356	if (__builtin_constant_p(size) && p_size < size)
357	__read_overflow();
358	if (p_size < size)
359	fortify_panic(__func__);
360	return __builtin_memchr(p, c, size);
361	}
362
363	void __real_memchr_inv(const void s, int c, size_t n) __RENAME(memchr_inv);
364	__FORTIFY_INLINE void memchr_inv(const void p, int c, size_t size)
365	{
366	size_t p_size = __builtin_object_size(p, 0);
367	if (__builtin_constant_p(size) && p_size < size)
368	__read_overflow();
369	if (p_size < size)
370	fortify_panic(__func__);
371	return __real_memchr_inv(p, c, size);
372	}
373
374	extern void __real_kmemdup(const void src, size_t len, gfp_t gfp) __RENAME(kmemdup);
375	__FORTIFY_INLINE void kmemdup(const void p, size_t size, gfp_t gfp)
376	{
377	size_t p_size = __builtin_object_size(p, 0);
378	if (__builtin_constant_p(size) && p_size < size)
379	__read_overflow();
380	if (p_size < size)
381	fortify_panic(__func__);
382	return __real_kmemdup(p, size, gfp);
383	}
077d2ba5 DM	384
	385	/* defined after fortified strlen and memcpy to reuse them */
	386	__FORTIFY_INLINE char strcpy(char p, const char *q)
	387	{
	388	size_t p_size = __builtin_object_size(p, 0);
	389	size_t q_size = __builtin_object_size(q, 0);
	390	if (p_size == (size_t)-1 && q_size == (size_t)-1)
	391	return __builtin_strcpy(p, q);
	392	memcpy(p, q, strlen(q) + 1);
	393	return p;
	394	}
	395
6974f0c4 DM	396	#endif
6974f0c4 DM	397
1da177e4	398	#endif /* _LINUX_STRING_H_ */