[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 **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);
543537bd	140
d84d1cc7 JF	141	extern char *argv_split(gfp_t gfp, const char str, int *argcp);
	142	extern void argv_free(char **argv);
	143
34990cf7	144	extern bool sysfs_streq(const char s1, const char s2);
ef951599 KC	145	extern int kstrtobool(const char s, bool res);
	146	static inline int strtobool(const char s, bool res)
	147	{
	148	return kstrtobool(s, res);
	149	}
34990cf7	150
56b06081	151	int match_string(const char * const array, size_t n, const char string);
e1fe7b6a HK	152	int __sysfs_match_string(const char * const array, size_t n, const char s);
	153
	154	/**
	155	* sysfs_match_string - matches given string in an array
	156	* @_a: array of strings
	157	* @_s: string to match with
	158	*
	159	* Helper for __sysfs_match_string(). Calculates the size of @a automatically.
	160	*/
	161	#define sysfs_match_string(_a, _s) __sysfs_match_string(_a, ARRAY_SIZE(_a), _s)
56b06081	162
4370aa4a LJ	163	#ifdef CONFIG_BINARY_PRINTF
	164	int vbin_printf(u32 bin_buf, size_t size, const char fmt, va_list args);
	165	int bstr_printf(char buf, size_t size, const char fmt, const u32 *bin_buf);
	166	int bprintf(u32 bin_buf, size_t size, const char fmt, ...) __printf(3, 4);
	167	#endif
	168
e108526e	169	extern ssize_t memory_read_from_buffer(void to, size_t count, loff_t ppos,
d4c5efdb	170	const void *from, size_t available);
e108526e	171
66f92cf9 RR	172	/**
	173	* strstarts - does @str start with @prefix?
	174	* @str: string to examine
	175	* @prefix: prefix to look for.
	176	*/
	177	static inline bool strstarts(const char str, const char prefix)
	178	{
	179	return strncmp(str, prefix, strlen(prefix)) == 0;
	180	}
639b9e34	181
d4c5efdb DB	182	size_t memweight(const void *ptr, size_t bytes);
d4c5efdb DB	183	void memzero_explicit(void *s, size_t count);
639b9e34	184
b18888ab AS	185	/**
	186	* kbasename - return the last part of a pathname.
	187	*
	188	* @path: path to extract the filename from.
	189	*/
	190	static inline const char kbasename(const char path)
	191	{
	192	const char *tail = strrchr(path, '/');
	193	return tail ? tail + 1 : path;
	194	}
	195
6974f0c4 DM	196	#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
	197	#define __RENAME(x) __asm__(#x)
	198
	199	void fortify_panic(const char *name) __noreturn __cold;
	200	void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
	201	void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
	202	void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
	203
	204	#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
6974f0c4 DM	205	__FORTIFY_INLINE char strncpy(char p, const char *q, __kernel_size_t size)
	206	{
	207	size_t p_size = __builtin_object_size(p, 0);
	208	if (__builtin_constant_p(size) && p_size < size)
	209	__write_overflow();
	210	if (p_size < size)
	211	fortify_panic(__func__);
	212	return __builtin_strncpy(p, q, size);
	213	}
	214
	215	__FORTIFY_INLINE char strcat(char p, const char *q)
	216	{
	217	size_t p_size = __builtin_object_size(p, 0);
	218	if (p_size == (size_t)-1)
	219	return __builtin_strcat(p, q);
	220	if (strlcat(p, q, p_size) >= p_size)
	221	fortify_panic(__func__);
	222	return p;
	223	}
	224
	225	__FORTIFY_INLINE __kernel_size_t strlen(const char *p)
	226	{
	227	__kernel_size_t ret;
	228	size_t p_size = __builtin_object_size(p, 0);
	229	if (p_size == (size_t)-1)
	230	return __builtin_strlen(p);
	231	ret = strnlen(p, p_size);
	232	if (p_size <= ret)
	233	fortify_panic(__func__);
	234	return ret;
	235	}
	236
	237	extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
	238	__FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
	239	{
	240	size_t p_size = __builtin_object_size(p, 0);
	241	__kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
	242	if (p_size <= ret && maxlen != ret)
	243	fortify_panic(__func__);
	244	return ret;
	245	}
	246
	247	/* defined after fortified strlen to reuse it */
	248	extern size_t __real_strlcpy(char , const char , size_t) __RENAME(strlcpy);
	249	__FORTIFY_INLINE size_t strlcpy(char p, const char q, size_t size)
	250	{
	251	size_t ret;
	252	size_t p_size = __builtin_object_size(p, 0);
	253	size_t q_size = __builtin_object_size(q, 0);
	254	if (p_size == (size_t)-1 && q_size == (size_t)-1)
	255	return __real_strlcpy(p, q, size);
	256	ret = strlen(q);
	257	if (size) {
	258	size_t len = (ret >= size) ? size - 1 : ret;
	259	if (__builtin_constant_p(len) && len >= p_size)
	260	__write_overflow();
	261	if (len >= p_size)
	262	fortify_panic(__func__);
	263	__builtin_memcpy(p, q, len);
	264	p[len] = '\0';
	265	}
	266	return ret;
	267	}
	268
269	/* defined after fortified strlen and strnlen to reuse them */
270	__FORTIFY_INLINE char strncat(char p, const char *q, __kernel_size_t count)
271	{
272	size_t p_len, copy_len;
273	size_t p_size = __builtin_object_size(p, 0);
274	size_t q_size = __builtin_object_size(q, 0);
275	if (p_size == (size_t)-1 && q_size == (size_t)-1)
276	return __builtin_strncat(p, q, count);
277	p_len = strlen(p);
278	copy_len = strnlen(q, count);
279	if (p_size < p_len + copy_len + 1)
280	fortify_panic(__func__);
281	__builtin_memcpy(p + p_len, q, copy_len);
282	p[p_len + copy_len] = '\0';
283	return p;
284	}
285
286	__FORTIFY_INLINE void memset(void p, int c, __kernel_size_t size)
287	{
288	size_t p_size = __builtin_object_size(p, 0);
289	if (__builtin_constant_p(size) && p_size < size)
290	__write_overflow();
291	if (p_size < size)
292	fortify_panic(__func__);
293	return __builtin_memset(p, c, size);
294	}
295
296	__FORTIFY_INLINE void memcpy(void p, const void *q, __kernel_size_t size)
297	{
298	size_t p_size = __builtin_object_size(p, 0);
299	size_t q_size = __builtin_object_size(q, 0);
300	if (__builtin_constant_p(size)) {
301	if (p_size < size)
302	__write_overflow();
303	if (q_size < size)
304	__read_overflow2();
305	}
306	if (p_size < size \|\| q_size < size)
307	fortify_panic(__func__);
308	return __builtin_memcpy(p, q, size);
309	}
310
311	__FORTIFY_INLINE void memmove(void p, const void *q, __kernel_size_t size)
312	{
313	size_t p_size = __builtin_object_size(p, 0);
314	size_t q_size = __builtin_object_size(q, 0);
315	if (__builtin_constant_p(size)) {
316	if (p_size < size)
317	__write_overflow();
318	if (q_size < size)
319	__read_overflow2();
320	}
321	if (p_size < size \|\| q_size < size)
322	fortify_panic(__func__);
323	return __builtin_memmove(p, q, size);
324	}
325
326	extern void __real_memscan(void , int, __kernel_size_t) __RENAME(memscan);
327	__FORTIFY_INLINE void memscan(void p, int c, __kernel_size_t size)
328	{
329	size_t p_size = __builtin_object_size(p, 0);
330	if (__builtin_constant_p(size) && p_size < size)
331	__read_overflow();
332	if (p_size < size)
333	fortify_panic(__func__);
334	return __real_memscan(p, c, size);
335	}
336
337	__FORTIFY_INLINE int memcmp(const void p, const void q, __kernel_size_t size)
338	{
339	size_t p_size = __builtin_object_size(p, 0);
340	size_t q_size = __builtin_object_size(q, 0);
341	if (__builtin_constant_p(size)) {
342	if (p_size < size)
343	__read_overflow();
344	if (q_size < size)
345	__read_overflow2();
346	}
347	if (p_size < size \|\| q_size < size)
348	fortify_panic(__func__);
349	return __builtin_memcmp(p, q, size);
350	}
351
352	__FORTIFY_INLINE void memchr(const void p, int c, __kernel_size_t size)
353	{
354	size_t p_size = __builtin_object_size(p, 0);
355	if (__builtin_constant_p(size) && p_size < size)
356	__read_overflow();
357	if (p_size < size)
358	fortify_panic(__func__);
359	return __builtin_memchr(p, c, size);
360	}
361
362	void __real_memchr_inv(const void s, int c, size_t n) __RENAME(memchr_inv);
363	__FORTIFY_INLINE void memchr_inv(const void p, int c, size_t size)
364	{
365	size_t p_size = __builtin_object_size(p, 0);
366	if (__builtin_constant_p(size) && p_size < size)
367	__read_overflow();
368	if (p_size < size)
369	fortify_panic(__func__);
370	return __real_memchr_inv(p, c, size);
371	}
372
373	extern void __real_kmemdup(const void src, size_t len, gfp_t gfp) __RENAME(kmemdup);
374	__FORTIFY_INLINE void kmemdup(const void p, size_t size, gfp_t gfp)
375	{
376	size_t p_size = __builtin_object_size(p, 0);
377	if (__builtin_constant_p(size) && p_size < size)
378	__read_overflow();
379	if (p_size < size)
380	fortify_panic(__func__);
381	return __real_kmemdup(p, size, gfp);
382	}
077d2ba5 DM	383
	384	/* defined after fortified strlen and memcpy to reuse them */
	385	__FORTIFY_INLINE char strcpy(char p, const char *q)
	386	{
	387	size_t p_size = __builtin_object_size(p, 0);
	388	size_t q_size = __builtin_object_size(q, 0);
	389	if (p_size == (size_t)-1 && q_size == (size_t)-1)
	390	return __builtin_strcpy(p, q);
	391	memcpy(p, q, strlen(q) + 1);
	392	return p;
	393	}
	394
6974f0c4 DM	395	#endif
6974f0c4 DM	396
1da177e4	397	#endif /* _LINUX_STRING_H_ */