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 */ 7 8 #ifndef _S390_STRING_H_ 9 #define _S390_STRING_H_ 10 11 #ifndef _LINUX_TYPES_H 12 #include <linux/types.h> 13 #endif 14 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 */ 21 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); 25 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 */ 41 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 */ 52 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 59 60 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) 61 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); 65 66 /* 67 * For files that are not instrumented (e.g. mm/slub.c) we 68 * should use not instrumented version of mem* functions. 69 */ 70 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) 74 75 #ifndef __NO_FORTIFY 76 #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ 77 #endif 78 79 #endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */ 80 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); 84 85 static inline void *memset16(uint16_t *s, uint16_t v, size_t count) 86 { 87 return __memset16(s, v, count * sizeof(v)); 88 } 89 90 static inline void *memset32(uint32_t *s, uint32_t v, size_t count) 91 { 92 return __memset32(s, v, count * sizeof(v)); 93 } 94 95 static inline void *memset64(uint64_t *s, uint64_t v, size_t count) 96 { 97 return __memset64(s, v, count * sizeof(v)); 98 } 99 100 #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY)) 101 102 #ifdef __HAVE_ARCH_MEMCHR 103 static inline void *memchr(const void * s, int c, size_t n) 104 { 105 register int r0 asm("0") = (char) c; 106 const void *ret = s + n; 107 108 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; 116 } 117 #endif 118 119 #ifdef __HAVE_ARCH_MEMSCAN 120 static inline void *memscan(void *s, int c, size_t n) 121 { 122 register int r0 asm("0") = (char) c; 123 const void *ret = s + n; 124 125 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; 130 } 131 #endif 132 133 #ifdef __HAVE_ARCH_STRCAT 134 static inline char *strcat(char *dst, const char *src) 135 { 136 register int r0 asm("0") = 0; 137 unsigned long dummy; 138 char *ret = dst; 139 140 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; 148 } 149 #endif 150 151 #ifdef __HAVE_ARCH_STRCPY 152 static inline char *strcpy(char *dst, const char *src) 153 { 154 register int r0 asm("0") = 0; 155 char *ret = dst; 156 157 asm volatile( 158 "0: mvst %0,%1\n" 159 " jo 0b" 160 : "+&a" (dst), "+&a" (src) : "d" (r0) 161 : "cc", "memory"); 162 return ret; 163 } 164 #endif 165 166 #ifdef __HAVE_ARCH_STRLEN 167 static inline size_t strlen(const char *s) 168 { 169 register unsigned long r0 asm("0") = 0; 170 const char *tmp = s; 171 172 asm volatile( 173 "0: srst %0,%1\n" 174 " jo 0b" 175 : "+d" (r0), "+a" (tmp) : : "cc", "memory"); 176 return r0 - (unsigned long) s; 177 } 178 #endif 179 180 #ifdef __HAVE_ARCH_STRNLEN 181 static inline size_t strnlen(const char * s, size_t n) 182 { 183 register int r0 asm("0") = 0; 184 const char *tmp = s; 185 const char *end = s + n; 186 187 asm volatile( 188 "0: srst %0,%1\n" 189 " jo 0b" 190 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc", "memory"); 191 return end - s; 192 } 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 */ 202 203 #endif /* __S390_STRING_H_ */ 204