1 /* SPDX-License-Identifier: GPL-2.0 */
4 * Copyright IBM Corp. 1999
8 #ifndef _S390_STRING_H_
9 #define _S390_STRING_H_
11 #ifndef _LINUX_TYPES_H
12 #include <linux/types.h>
15 #define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */
16 #define __HAVE_ARCH_MEMMOVE /* gcc builtin & arch function */
17 #define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */
18 #define __HAVE_ARCH_MEMSET16 /* arch function */
19 #define __HAVE_ARCH_MEMSET32 /* arch function */
20 #define __HAVE_ARCH_MEMSET64 /* arch function */
22 void *memcpy(void *dest, const void *src, size_t n);
23 void *memset(void *s, int c, size_t n);
24 void *memmove(void *dest, const void *src, size_t n);
27 #define __HAVE_ARCH_MEMCHR /* inline & arch function */
28 #define __HAVE_ARCH_MEMCMP /* arch function */
29 #define __HAVE_ARCH_MEMSCAN /* inline & arch function */
30 #define __HAVE_ARCH_STRCAT /* inline & arch function */
31 #define __HAVE_ARCH_STRCMP /* arch function */
32 #define __HAVE_ARCH_STRCPY /* inline & arch function */
33 #define __HAVE_ARCH_STRLCAT /* arch function */
34 #define __HAVE_ARCH_STRLEN /* inline & arch function */
35 #define __HAVE_ARCH_STRNCAT /* arch function */
36 #define __HAVE_ARCH_STRNCPY /* arch function */
37 #define __HAVE_ARCH_STRNLEN /* inline & arch function */
38 #define __HAVE_ARCH_STRSTR /* arch function */
40 /* Prototypes for non-inlined arch strings functions. */
41 int memcmp(const void *s1, const void *s2, size_t n);
42 int strcmp(const char *s1, const char *s2);
43 size_t strlcat(char *dest, const char *src, size_t n);
44 char *strncat(char *dest, const char *src, size_t n);
45 char *strncpy(char *dest, const char *src, size_t n);
46 char *strstr(const char *s1, const char *s2);
47 #endif /* !CONFIG_KASAN */
49 #undef __HAVE_ARCH_STRCHR
50 #undef __HAVE_ARCH_STRNCHR
51 #undef __HAVE_ARCH_STRNCMP
52 #undef __HAVE_ARCH_STRPBRK
53 #undef __HAVE_ARCH_STRSEP
54 #undef __HAVE_ARCH_STRSPN
56 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
58 #define strlen(s) __strlen(s)
60 #define __no_sanitize_prefix_strfunc(x) __##x
63 #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
67 #define __no_sanitize_prefix_strfunc(x) x
68 #endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */
70 void *__memcpy(void *dest, const void *src, size_t n);
71 void *__memset(void *s, int c, size_t n);
72 void *__memmove(void *dest, const void *src, size_t n);
73 void *__memset16(uint16_t *s, uint16_t v, size_t count);
74 void *__memset32(uint32_t *s, uint32_t v, size_t count);
75 void *__memset64(uint64_t *s, uint64_t v, size_t count);
77 static inline void *memset16(uint16_t *s, uint16_t v, size_t count)
79 return __memset16(s, v, count * sizeof(v));
82 static inline void *memset32(uint32_t *s, uint32_t v, size_t count)
84 return __memset32(s, v, count * sizeof(v));
87 static inline void *memset64(uint64_t *s, uint64_t v, size_t count)
89 return __memset64(s, v, count * sizeof(v));
92 #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY))
94 #ifdef __HAVE_ARCH_MEMCHR
95 static inline void *memchr(const void * s, int c, size_t n)
97 const void *ret = s + n;
101 "0: srst %[ret],%[s]\n"
106 : [ret] "+&a" (ret), [s] "+&a" (s)
108 : "cc", "memory", "0");
113 #ifdef __HAVE_ARCH_MEMSCAN
114 static inline void *memscan(void *s, int c, size_t n)
116 const void *ret = s + n;
120 "0: srst %[ret],%[s]\n"
122 : [ret] "+&a" (ret), [s] "+&a" (s)
124 : "cc", "memory", "0");
129 #ifdef __HAVE_ARCH_STRCAT
130 static inline char *strcat(char *dst, const char *src)
132 unsigned long dummy = 0;
137 "0: srst %[dummy],%[dst]\n"
139 "1: mvst %[dummy],%[src]\n"
141 : [dummy] "+&a" (dummy), [dst] "+&a" (dst), [src] "+&a" (src)
143 : "cc", "memory", "0");
148 #ifdef __HAVE_ARCH_STRCPY
149 static inline char *strcpy(char *dst, const char *src)
155 "0: mvst %[dst],%[src]\n"
157 : [dst] "+&a" (dst), [src] "+&a" (src)
159 : "cc", "memory", "0");
164 #if defined(__HAVE_ARCH_STRLEN) || (defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__))
165 static inline size_t __no_sanitize_prefix_strfunc(strlen)(const char *s)
167 unsigned long end = 0;
172 "0: srst %[end],%[tmp]\n"
174 : [end] "+&a" (end), [tmp] "+&a" (tmp)
176 : "cc", "memory", "0");
177 return end - (unsigned long)s;
181 #ifdef __HAVE_ARCH_STRNLEN
182 static inline size_t strnlen(const char * s, size_t n)
185 const char *end = s + n;
189 "0: srst %[end],%[tmp]\n"
191 : [end] "+&a" (end), [tmp] "+&a" (tmp)
193 : "cc", "memory", "0");
197 #else /* IN_ARCH_STRING_C */
198 void *memchr(const void * s, int c, size_t n);
199 void *memscan(void *s, int c, size_t n);
200 char *strcat(char *dst, const char *src);
201 char *strcpy(char *dst, const char *src);
202 size_t strlen(const char *s);
203 size_t strnlen(const char * s, size_t n);
204 #endif /* !IN_ARCH_STRING_C */
206 #endif /* __S390_STRING_H_ */