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/* 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_ */
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