diff options
Diffstat (limited to 'arch/s390/include/asm/string.h')
| -rw-r--r-- | arch/s390/include/asm/string.h | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h new file mode 100644 index 000000000..3fae93ddb --- /dev/null +++ b/arch/s390/include/asm/string.h @@ -0,0 +1,215 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * S390 version + * Copyright IBM Corp. 1999 + * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), + */ + +#ifndef _S390_STRING_H_ +#define _S390_STRING_H_ + +#ifndef _LINUX_TYPES_H +#include <linux/types.h> +#endif + +#define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */ +#define __HAVE_ARCH_MEMMOVE /* gcc builtin & arch function */ +#define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */ +#define __HAVE_ARCH_MEMSET16 /* arch function */ +#define __HAVE_ARCH_MEMSET32 /* arch function */ +#define __HAVE_ARCH_MEMSET64 /* arch function */ + +void *memcpy(void *dest, const void *src, size_t n); +void *memset(void *s, int c, size_t n); +void *memmove(void *dest, const void *src, size_t n); + +#ifndef CONFIG_KASAN +#define __HAVE_ARCH_MEMCHR /* inline & arch function */ +#define __HAVE_ARCH_MEMCMP /* arch function */ +#define __HAVE_ARCH_MEMSCAN /* inline & arch function */ +#define __HAVE_ARCH_STRCAT /* inline & arch function */ +#define __HAVE_ARCH_STRCMP /* arch function */ +#define __HAVE_ARCH_STRCPY /* inline & arch function */ +#define __HAVE_ARCH_STRLCAT /* arch function */ +#define __HAVE_ARCH_STRLEN /* inline & arch function */ +#define __HAVE_ARCH_STRNCAT /* arch function */ +#define __HAVE_ARCH_STRNCPY /* arch function */ +#define __HAVE_ARCH_STRNLEN /* inline & arch function */ +#define __HAVE_ARCH_STRSTR /* arch function */ + +/* Prototypes for non-inlined arch strings functions. */ +int memcmp(const void *s1, const void *s2, size_t n); +int strcmp(const char *s1, const char *s2); +size_t strlcat(char *dest, const char *src, size_t n); +char *strncat(char *dest, const char *src, size_t n); +char *strncpy(char *dest, const char *src, size_t n); +char *strstr(const char *s1, const char *s2); +#endif /* !CONFIG_KASAN */ + +#undef __HAVE_ARCH_STRCHR +#undef __HAVE_ARCH_STRNCHR +#undef __HAVE_ARCH_STRNCMP +#undef __HAVE_ARCH_STRPBRK +#undef __HAVE_ARCH_STRSEP +#undef __HAVE_ARCH_STRSPN + +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) + +extern void *__memcpy(void *dest, const void *src, size_t n); +extern void *__memset(void *s, int c, size_t n); +extern void *__memmove(void *dest, const void *src, size_t n); + +/* + * For files that are not instrumented (e.g. mm/slub.c) we + * should use not instrumented version of mem* functions. + */ + +#define memcpy(dst, src, len) __memcpy(dst, src, len) +#define memmove(dst, src, len) __memmove(dst, src, len) +#define memset(s, c, n) __memset(s, c, n) +#define strlen(s) __strlen(s) + +#define __no_sanitize_prefix_strfunc(x) __##x + +#ifndef __NO_FORTIFY +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ +#endif + +#else +#define __no_sanitize_prefix_strfunc(x) x +#endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */ + +void *__memset16(uint16_t *s, uint16_t v, size_t count); +void *__memset32(uint32_t *s, uint32_t v, size_t count); +void *__memset64(uint64_t *s, uint64_t v, size_t count); + +static inline void *memset16(uint16_t *s, uint16_t v, size_t count) +{ + return __memset16(s, v, count * sizeof(v)); +} + +static inline void *memset32(uint32_t *s, uint32_t v, size_t count) +{ + return __memset32(s, v, count * sizeof(v)); +} + +static inline void *memset64(uint64_t *s, uint64_t v, size_t count) +{ + return __memset64(s, v, count * sizeof(v)); +} + +#if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY)) + +#ifdef __HAVE_ARCH_MEMCHR +static inline void *memchr(const void * s, int c, size_t n) +{ + const void *ret = s + n; + + asm volatile( + " lgr 0,%[c]\n" + "0: srst %[ret],%[s]\n" + " jo 0b\n" + " jl 1f\n" + " la %[ret],0\n" + "1:" + : [ret] "+&a" (ret), [s] "+&a" (s) + : [c] "d" (c) + : "cc", "memory", "0"); + return (void *) ret; +} +#endif + +#ifdef __HAVE_ARCH_MEMSCAN +static inline void *memscan(void *s, int c, size_t n) +{ + const void *ret = s + n; + + asm volatile( + " lgr 0,%[c]\n" + "0: srst %[ret],%[s]\n" + " jo 0b\n" + : [ret] "+&a" (ret), [s] "+&a" (s) + : [c] "d" (c) + : "cc", "memory", "0"); + return (void *) ret; +} +#endif + +#ifdef __HAVE_ARCH_STRCAT +static inline char *strcat(char *dst, const char *src) +{ + unsigned long dummy = 0; + char *ret = dst; + + asm volatile( + " lghi 0,0\n" + "0: srst %[dummy],%[dst]\n" + " jo 0b\n" + "1: mvst %[dummy],%[src]\n" + " jo 1b" + : [dummy] "+&a" (dummy), [dst] "+&a" (dst), [src] "+&a" (src) + : + : "cc", "memory", "0"); + return ret; +} +#endif + +#ifdef __HAVE_ARCH_STRCPY +static inline char *strcpy(char *dst, const char *src) +{ + char *ret = dst; + + asm volatile( + " lghi 0,0\n" + "0: mvst %[dst],%[src]\n" + " jo 0b" + : [dst] "+&a" (dst), [src] "+&a" (src) + : + : "cc", "memory", "0"); + return ret; +} +#endif + +#if defined(__HAVE_ARCH_STRLEN) || (defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)) +static inline size_t __no_sanitize_prefix_strfunc(strlen)(const char *s) +{ + unsigned long end = 0; + const char *tmp = s; + + asm volatile( + " lghi 0,0\n" + "0: srst %[end],%[tmp]\n" + " jo 0b" + : [end] "+&a" (end), [tmp] "+&a" (tmp) + : + : "cc", "memory", "0"); + return end - (unsigned long)s; +} +#endif + +#ifdef __HAVE_ARCH_STRNLEN +static inline size_t strnlen(const char * s, size_t n) +{ + const char *tmp = s; + const char *end = s + n; + + asm volatile( + " lghi 0,0\n" + "0: srst %[end],%[tmp]\n" + " jo 0b" + : [end] "+&a" (end), [tmp] "+&a" (tmp) + : + : "cc", "memory", "0"); + return end - s; +} +#endif +#else /* IN_ARCH_STRING_C */ +void *memchr(const void * s, int c, size_t n); +void *memscan(void *s, int c, size_t n); +char *strcat(char *dst, const char *src); +char *strcpy(char *dst, const char *src); +size_t strlen(const char *s); +size_t strnlen(const char * s, size_t n); +#endif /* !IN_ARCH_STRING_C */ + +#endif /* __S390_STRING_H_ */ |