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[linux/fpc-iii.git] / arch / s390 / include / asm / string.h
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1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * S390 version
4 * Copyright IBM Corp. 1999
5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
6 */
8 #ifndef _S390_STRING_H_
9 #define _S390_STRING_H_
11 #ifndef _LINUX_TYPES_H
12 #include <linux/types.h>
13 #endif
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);
26 #ifndef CONFIG_KASAN
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_STRLCPY /* arch function */
35 #define __HAVE_ARCH_STRLEN /* inline & arch function */
36 #define __HAVE_ARCH_STRNCAT /* arch function */
37 #define __HAVE_ARCH_STRNCPY /* arch function */
38 #define __HAVE_ARCH_STRNLEN /* inline & arch function */
39 #define __HAVE_ARCH_STRRCHR /* arch function */
40 #define __HAVE_ARCH_STRSTR /* arch function */
42 /* Prototypes for non-inlined arch strings functions. */
43 int memcmp(const void *s1, const void *s2, size_t n);
44 int strcmp(const char *s1, const char *s2);
45 size_t strlcat(char *dest, const char *src, size_t n);
46 size_t strlcpy(char *dest, const char *src, size_t size);
47 char *strncat(char *dest, const char *src, size_t n);
48 char *strncpy(char *dest, const char *src, size_t n);
49 char *strrchr(const char *s, int c);
50 char *strstr(const char *s1, const char *s2);
51 #endif /* !CONFIG_KASAN */
53 #undef __HAVE_ARCH_STRCHR
54 #undef __HAVE_ARCH_STRNCHR
55 #undef __HAVE_ARCH_STRNCMP
56 #undef __HAVE_ARCH_STRPBRK
57 #undef __HAVE_ARCH_STRSEP
58 #undef __HAVE_ARCH_STRSPN
60 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
62 extern void *__memcpy(void *dest, const void *src, size_t n);
63 extern void *__memset(void *s, int c, size_t n);
64 extern void *__memmove(void *dest, const void *src, size_t n);
67 * For files that are not instrumented (e.g. mm/slub.c) we
68 * should use not instrumented version of mem* functions.
71 #define memcpy(dst, src, len) __memcpy(dst, src, len)
72 #define memmove(dst, src, len) __memmove(dst, src, len)
73 #define memset(s, c, n) __memset(s, c, n)
75 #ifndef __NO_FORTIFY
76 #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
77 #endif
79 #endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */
81 void *__memset16(uint16_t *s, uint16_t v, size_t count);
82 void *__memset32(uint32_t *s, uint32_t v, size_t count);
83 void *__memset64(uint64_t *s, uint64_t v, size_t count);
85 static inline void *memset16(uint16_t *s, uint16_t v, size_t count)
87 return __memset16(s, v, count * sizeof(v));
90 static inline void *memset32(uint32_t *s, uint32_t v, size_t count)
92 return __memset32(s, v, count * sizeof(v));
95 static inline void *memset64(uint64_t *s, uint64_t v, size_t count)
97 return __memset64(s, v, count * sizeof(v));
100 #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY))
102 #ifdef __HAVE_ARCH_MEMCHR
103 static inline void *memchr(const void * s, int c, size_t n)
105 register int r0 asm("0") = (char) c;
106 const void *ret = s + n;
108 asm volatile(
109 "0: srst %0,%1\n"
110 " jo 0b\n"
111 " jl 1f\n"
112 " la %0,0\n"
113 "1:"
114 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
115 return (void *) ret;
117 #endif
119 #ifdef __HAVE_ARCH_MEMSCAN
120 static inline void *memscan(void *s, int c, size_t n)
122 register int r0 asm("0") = (char) c;
123 const void *ret = s + n;
125 asm volatile(
126 "0: srst %0,%1\n"
127 " jo 0b\n"
128 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
129 return (void *) ret;
131 #endif
133 #ifdef __HAVE_ARCH_STRCAT
134 static inline char *strcat(char *dst, const char *src)
136 register int r0 asm("0") = 0;
137 unsigned long dummy;
138 char *ret = dst;
140 asm volatile(
141 "0: srst %0,%1\n"
142 " jo 0b\n"
143 "1: mvst %0,%2\n"
144 " jo 1b"
145 : "=&a" (dummy), "+a" (dst), "+a" (src)
146 : "d" (r0), "0" (0) : "cc", "memory" );
147 return ret;
149 #endif
151 #ifdef __HAVE_ARCH_STRCPY
152 static inline char *strcpy(char *dst, const char *src)
154 register int r0 asm("0") = 0;
155 char *ret = dst;
157 asm volatile(
158 "0: mvst %0,%1\n"
159 " jo 0b"
160 : "+&a" (dst), "+&a" (src) : "d" (r0)
161 : "cc", "memory");
162 return ret;
164 #endif
166 #ifdef __HAVE_ARCH_STRLEN
167 static inline size_t strlen(const char *s)
169 register unsigned long r0 asm("0") = 0;
170 const char *tmp = s;
172 asm volatile(
173 "0: srst %0,%1\n"
174 " jo 0b"
175 : "+d" (r0), "+a" (tmp) : : "cc", "memory");
176 return r0 - (unsigned long) s;
178 #endif
180 #ifdef __HAVE_ARCH_STRNLEN
181 static inline size_t strnlen(const char * s, size_t n)
183 register int r0 asm("0") = 0;
184 const char *tmp = s;
185 const char *end = s + n;
187 asm volatile(
188 "0: srst %0,%1\n"
189 " jo 0b"
190 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc", "memory");
191 return end - s;
193 #endif
194 #else /* IN_ARCH_STRING_C */
195 void *memchr(const void * s, int c, size_t n);
196 void *memscan(void *s, int c, size_t n);
197 char *strcat(char *dst, const char *src);
198 char *strcpy(char *dst, const char *src);
199 size_t strlen(const char *s);
200 size_t strnlen(const char * s, size_t n);
201 #endif /* !IN_ARCH_STRING_C */
203 #endif /* __S390_STRING_H_ */