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_MEMCHR /* inline & arch function */ 16 #define __HAVE_ARCH_MEMCMP /* arch function */ 17 #define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */ 18 #define __HAVE_ARCH_MEMMOVE /* gcc builtin & arch function */ 19 #define __HAVE_ARCH_MEMSCAN /* inline & arch function */ 20 #define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */ 21 #define __HAVE_ARCH_MEMSET16 /* arch function */ 22 #define __HAVE_ARCH_MEMSET32 /* arch function */ 23 #define __HAVE_ARCH_MEMSET64 /* arch function */ 24 #define __HAVE_ARCH_STRCAT /* inline & arch function */ 25 #define __HAVE_ARCH_STRCMP /* arch function */ 26 #define __HAVE_ARCH_STRCPY /* inline & arch function */ 27 #define __HAVE_ARCH_STRLCAT /* arch function */ 28 #define __HAVE_ARCH_STRLCPY /* arch function */ 29 #define __HAVE_ARCH_STRLEN /* inline & arch function */ 30 #define __HAVE_ARCH_STRNCAT /* arch function */ 31 #define __HAVE_ARCH_STRNCPY /* arch function */ 32 #define __HAVE_ARCH_STRNLEN /* inline & arch function */ 33 #define __HAVE_ARCH_STRRCHR /* arch function */ 34 #define __HAVE_ARCH_STRSTR /* arch function */ 35 36 /* Prototypes for non-inlined arch strings functions. */ 37 int memcmp(const void *s1, const void *s2, size_t n); 38 void *memcpy(void *dest, const void *src, size_t n); 39 void *memset(void *s, int c, size_t n); 40 void *memmove(void *dest, const void *src, size_t n); 41 int strcmp(const char *s1, const char *s2); 42 size_t strlcat(char *dest, const char *src, size_t n); 43 size_t strlcpy(char *dest, const char *src, size_t size); 44 char *strncat(char *dest, const char *src, size_t n); 45 char *strncpy(char *dest, const char *src, size_t n); 46 char *strrchr(const char *s, int c); 47 char *strstr(const char *s1, const char *s2); 48 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 55 56 void *__memset16(uint16_t *s, uint16_t v, size_t count); 57 void *__memset32(uint32_t *s, uint32_t v, size_t count); 58 void *__memset64(uint64_t *s, uint64_t v, size_t count); 59 60 static inline void *memset16(uint16_t *s, uint16_t v, size_t count) 61 { 62 return __memset16(s, v, count * sizeof(v)); 63 } 64 65 static inline void *memset32(uint32_t *s, uint32_t v, size_t count) 66 { 67 return __memset32(s, v, count * sizeof(v)); 68 } 69 70 static inline void *memset64(uint64_t *s, uint64_t v, size_t count) 71 { 72 return __memset64(s, v, count * sizeof(v)); 73 } 74 75 #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY)) 76 77 static inline void *memchr(const void * s, int c, size_t n) 78 { 79 register int r0 asm("0") = (char) c; 80 const void *ret = s + n; 81 82 asm volatile( 83 "0: srst %0,%1\n" 84 " jo 0b\n" 85 " jl 1f\n" 86 " la %0,0\n" 87 "1:" 88 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory"); 89 return (void *) ret; 90 } 91 92 static inline void *memscan(void *s, int c, size_t n) 93 { 94 register int r0 asm("0") = (char) c; 95 const void *ret = s + n; 96 97 asm volatile( 98 "0: srst %0,%1\n" 99 " jo 0b\n" 100 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory"); 101 return (void *) ret; 102 } 103 104 static inline char *strcat(char *dst, const char *src) 105 { 106 register int r0 asm("0") = 0; 107 unsigned long dummy; 108 char *ret = dst; 109 110 asm volatile( 111 "0: srst %0,%1\n" 112 " jo 0b\n" 113 "1: mvst %0,%2\n" 114 " jo 1b" 115 : "=&a" (dummy), "+a" (dst), "+a" (src) 116 : "d" (r0), "0" (0) : "cc", "memory" ); 117 return ret; 118 } 119 120 static inline char *strcpy(char *dst, const char *src) 121 { 122 register int r0 asm("0") = 0; 123 char *ret = dst; 124 125 asm volatile( 126 "0: mvst %0,%1\n" 127 " jo 0b" 128 : "+&a" (dst), "+&a" (src) : "d" (r0) 129 : "cc", "memory"); 130 return ret; 131 } 132 133 static inline size_t strlen(const char *s) 134 { 135 register unsigned long r0 asm("0") = 0; 136 const char *tmp = s; 137 138 asm volatile( 139 "0: srst %0,%1\n" 140 " jo 0b" 141 : "+d" (r0), "+a" (tmp) : : "cc", "memory"); 142 return r0 - (unsigned long) s; 143 } 144 145 static inline size_t strnlen(const char * s, size_t n) 146 { 147 register int r0 asm("0") = 0; 148 const char *tmp = s; 149 const char *end = s + n; 150 151 asm volatile( 152 "0: srst %0,%1\n" 153 " jo 0b" 154 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc", "memory"); 155 return end - s; 156 } 157 #else /* IN_ARCH_STRING_C */ 158 void *memchr(const void * s, int c, size_t n); 159 void *memscan(void *s, int c, size_t n); 160 char *strcat(char *dst, const char *src); 161 char *strcpy(char *dst, const char *src); 162 size_t strlen(const char *s); 163 size_t strnlen(const char * s, size_t n); 164 #endif /* !IN_ARCH_STRING_C */ 165 166 #endif /* __S390_STRING_H_ */ 167