mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 23:05:23 +07:00
f45f7b5bda
s390 kasan code uses sclp_early_printk to report initialization failures. The code doing that should not be instrumented, because kasan shadow memory has not been set up yet. Even though sclp_early_core.c is compiled with instrumentation disabled it uses strlen function, which is instrumented and would produce shadow memory access if used. To avoid that, introduce uninstrumented __strlen function to be used instead. Before commit7e0d92f002("s390/kasan: improve string/memory functions checks") few string functions (including strlen) were escaping kasan instrumentation due to usage of platform specific versions which are implemented in inline assembly. Fixes:7e0d92f002("s390/kasan: improve string/memory functions checks") Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
209 lines
5.6 KiB
C
209 lines
5.6 KiB
C
/* 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_STRLCPY /* 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_STRRCHR /* 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);
|
|
size_t strlcpy(char *dest, const char *src, size_t size);
|
|
char *strncat(char *dest, const char *src, size_t n);
|
|
char *strncpy(char *dest, const char *src, size_t n);
|
|
char *strrchr(const char *s, int c);
|
|
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)
|
|
{
|
|
register int r0 asm("0") = (char) c;
|
|
const void *ret = s + n;
|
|
|
|
asm volatile(
|
|
"0: srst %0,%1\n"
|
|
" jo 0b\n"
|
|
" jl 1f\n"
|
|
" la %0,0\n"
|
|
"1:"
|
|
: "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
|
|
return (void *) ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef __HAVE_ARCH_MEMSCAN
|
|
static inline void *memscan(void *s, int c, size_t n)
|
|
{
|
|
register int r0 asm("0") = (char) c;
|
|
const void *ret = s + n;
|
|
|
|
asm volatile(
|
|
"0: srst %0,%1\n"
|
|
" jo 0b\n"
|
|
: "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
|
|
return (void *) ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef __HAVE_ARCH_STRCAT
|
|
static inline char *strcat(char *dst, const char *src)
|
|
{
|
|
register int r0 asm("0") = 0;
|
|
unsigned long dummy;
|
|
char *ret = dst;
|
|
|
|
asm volatile(
|
|
"0: srst %0,%1\n"
|
|
" jo 0b\n"
|
|
"1: mvst %0,%2\n"
|
|
" jo 1b"
|
|
: "=&a" (dummy), "+a" (dst), "+a" (src)
|
|
: "d" (r0), "0" (0) : "cc", "memory" );
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef __HAVE_ARCH_STRCPY
|
|
static inline char *strcpy(char *dst, const char *src)
|
|
{
|
|
register int r0 asm("0") = 0;
|
|
char *ret = dst;
|
|
|
|
asm volatile(
|
|
"0: mvst %0,%1\n"
|
|
" jo 0b"
|
|
: "+&a" (dst), "+&a" (src) : "d" (r0)
|
|
: "cc", "memory");
|
|
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)
|
|
{
|
|
register unsigned long r0 asm("0") = 0;
|
|
const char *tmp = s;
|
|
|
|
asm volatile(
|
|
"0: srst %0,%1\n"
|
|
" jo 0b"
|
|
: "+d" (r0), "+a" (tmp) : : "cc", "memory");
|
|
return r0 - (unsigned long) s;
|
|
}
|
|
#endif
|
|
|
|
#ifdef __HAVE_ARCH_STRNLEN
|
|
static inline size_t strnlen(const char * s, size_t n)
|
|
{
|
|
register int r0 asm("0") = 0;
|
|
const char *tmp = s;
|
|
const char *end = s + n;
|
|
|
|
asm volatile(
|
|
"0: srst %0,%1\n"
|
|
" jo 0b"
|
|
: "+a" (end), "+a" (tmp) : "d" (r0) : "cc", "memory");
|
|
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_ */
|