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 #define strlen(s) __strlen(s) 75 76 #define __no_sanitize_prefix_strfunc(x) __##x 77 78 #ifndef __NO_FORTIFY 79 #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ 80 #endif 81 82 #else 83 #define __no_sanitize_prefix_strfunc(x) x 84 #endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */ 85 86 void *__memset16(uint16_t *s, uint16_t v, size_t count); 87 void *__memset32(uint32_t *s, uint32_t v, size_t count); 88 void *__memset64(uint64_t *s, uint64_t v, size_t count); 89 90 static inline void *memset16(uint16_t *s, uint16_t v, size_t count) 91 { 92 return __memset16(s, v, count * sizeof(v)); 93 } 94 95 static inline void *memset32(uint32_t *s, uint32_t v, size_t count) 96 { 97 return __memset32(s, v, count * sizeof(v)); 98 } 99 100 static inline void *memset64(uint64_t *s, uint64_t v, size_t count) 101 { 102 return __memset64(s, v, count * sizeof(v)); 103 } 104 105 #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY)) 106 107 #ifdef __HAVE_ARCH_MEMCHR 108 static inline void *memchr(const void * s, int c, size_t n) 109 { 110 register int r0 asm("0") = (char) c; 111 const void *ret = s + n; 112 113 asm volatile( 114 "0: srst %0,%1\n" 115 " jo 0b\n" 116 " jl 1f\n" 117 " la %0,0\n" 118 "1:" 119 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory"); 120 return (void *) ret; 121 } 122 #endif 123 124 #ifdef __HAVE_ARCH_MEMSCAN 125 static inline void *memscan(void *s, int c, size_t n) 126 { 127 register int r0 asm("0") = (char) c; 128 const void *ret = s + n; 129 130 asm volatile( 131 "0: srst %0,%1\n" 132 " jo 0b\n" 133 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory"); 134 return (void *) ret; 135 } 136 #endif 137 138 #ifdef __HAVE_ARCH_STRCAT 139 static inline char *strcat(char *dst, const char *src) 140 { 141 register int r0 asm("0") = 0; 142 unsigned long dummy; 143 char *ret = dst; 144 145 asm volatile( 146 "0: srst %0,%1\n" 147 " jo 0b\n" 148 "1: mvst %0,%2\n" 149 " jo 1b" 150 : "=&a" (dummy), "+a" (dst), "+a" (src) 151 : "d" (r0), "0" (0) : "cc", "memory" ); 152 return ret; 153 } 154 #endif 155 156 #ifdef __HAVE_ARCH_STRCPY 157 static inline char *strcpy(char *dst, const char *src) 158 { 159 register int r0 asm("0") = 0; 160 char *ret = dst; 161 162 asm volatile( 163 "0: mvst %0,%1\n" 164 " jo 0b" 165 : "+&a" (dst), "+&a" (src) : "d" (r0) 166 : "cc", "memory"); 167 return ret; 168 } 169 #endif 170 171 #if defined(__HAVE_ARCH_STRLEN) || (defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)) 172 static inline size_t __no_sanitize_prefix_strfunc(strlen)(const char *s) 173 { 174 register unsigned long r0 asm("0") = 0; 175 const char *tmp = s; 176 177 asm volatile( 178 "0: srst %0,%1\n" 179 " jo 0b" 180 : "+d" (r0), "+a" (tmp) : : "cc", "memory"); 181 return r0 - (unsigned long) s; 182 } 183 #endif 184 185 #ifdef __HAVE_ARCH_STRNLEN 186 static inline size_t strnlen(const char * s, size_t n) 187 { 188 register int r0 asm("0") = 0; 189 const char *tmp = s; 190 const char *end = s + n; 191 192 asm volatile( 193 "0: srst %0,%1\n" 194 " jo 0b" 195 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc", "memory"); 196 return end - s; 197 } 198 #endif 199 #else /* IN_ARCH_STRING_C */ 200 void *memchr(const void * s, int c, size_t n); 201 void *memscan(void *s, int c, size_t n); 202 char *strcat(char *dst, const char *src); 203 char *strcpy(char *dst, const char *src); 204 size_t strlen(const char *s); 205 size_t strnlen(const char * s, size_t n); 206 #endif /* !IN_ARCH_STRING_C */ 207 208 #endif /* __S390_STRING_H_ */ 209