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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 */
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
22void *memcpy(void *dest, const void *src, size_t n);
23void *memset(void *s, int c, size_t n);
24void *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. */
43int memcmp(const void *s1, const void *s2, size_t n);
44int strcmp(const char *s1, const char *s2);
45size_t strlcat(char *dest, const char *src, size_t n);
46size_t strlcpy(char *dest, const char *src, size_t size);
47char *strncat(char *dest, const char *src, size_t n);
48char *strncpy(char *dest, const char *src, size_t n);
49char *strrchr(const char *s, int c);
50char *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
62extern void *__memcpy(void *dest, const void *src, size_t n);
63extern void *__memset(void *s, int c, size_t n);
64extern 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
81void *__memset16(uint16_t *s, uint16_t v, size_t count);
82void *__memset32(uint32_t *s, uint32_t v, size_t count);
83void *__memset64(uint64_t *s, uint64_t v, size_t count);
84
85static inline void *memset16(uint16_t *s, uint16_t v, size_t count)
86{
87 return __memset16(s, v, count * sizeof(v));
88}
89
90static inline void *memset32(uint32_t *s, uint32_t v, size_t count)
91{
92 return __memset32(s, v, count * sizeof(v));
93}
94
95static 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
103static 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
120static 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
134static 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
152static 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
167static 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
181static 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 */
195void *memchr(const void * s, int c, size_t n);
196void *memscan(void *s, int c, size_t n);
197char *strcat(char *dst, const char *src);
198char *strcpy(char *dst, const char *src);
199size_t strlen(const char *s);
200size_t strnlen(const char * s, size_t n);
201#endif /* !IN_ARCH_STRING_C */
202
203#endif /* __S390_STRING_H_ */