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s390/kasan: remove override of mem*() functions 

The kasan mem*() functions are not used anymore since s390 has switched
to GENERIC_ENTRY and commit 69d4c0d321 ("entry, kasan, x86: Disallow
overriding mem*() functions").

Therefore remove the now dead code, similar to x86.
While at it also use the SYM* macros in mem.S.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2023-04-16 20:15:17 +02:00 committed by Vasily Gorbik
parent 2d1b21ecea
commit e48b6853d8
2 changed files with 18 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/s390/include/asm/string.h
View File

@ -55,18 +55,6 @@ char *strstr(const char *s1, const char *s2);
#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
@ -79,6 +67,9 @@ extern void *__memmove(void *dest, const void *src, size_t n);
#define __no_sanitize_prefix_strfunc(x) x
#endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */
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);
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);

24
arch/s390/lib/mem.S
View File

@ -14,8 +14,7 @@
/*
* void *memmove(void *dest, const void *src, size_t n)
*/
WEAK(memmove)
ENTRY(__memmove)
SYM_FUNC_START(__memmove)
ltgr %r4,%r4
lgr %r1,%r2
jz .Lmemmove_exit
@ -48,7 +47,10 @@ ENTRY(__memmove)
BR_EX %r14
.Lmemmove_mvc:
mvc 0(1,%r1),0(%r3)
ENDPROC(__memmove)
SYM_FUNC_END(__memmove)
EXPORT_SYMBOL(__memmove)
SYM_FUNC_ALIAS(memmove, __memmove)
EXPORT_SYMBOL(memmove)
/*
@ -66,8 +68,7 @@ EXPORT_SYMBOL(memmove)
* return __builtin_memset(s, c, n);
* }
*/
WEAK(memset)
ENTRY(__memset)
SYM_FUNC_START(__memset)
ltgr %r4,%r4
jz .Lmemset_exit
ltgr %r3,%r3
@ -111,7 +112,10 @@ ENTRY(__memset)
xc 0(1,%r1),0(%r1)
.Lmemset_mvc:
mvc 1(1,%r1),0(%r1)
ENDPROC(__memset)
SYM_FUNC_END(__memset)
EXPORT_SYMBOL(__memset)
SYM_FUNC_ALIAS(memset, __memset)
EXPORT_SYMBOL(memset)
/*
@ -119,8 +123,7 @@ EXPORT_SYMBOL(memset)
*
* void *memcpy(void *dest, const void *src, size_t n)
*/
WEAK(memcpy)
ENTRY(__memcpy)
SYM_FUNC_START(__memcpy)
ltgr %r4,%r4
jz .Lmemcpy_exit
aghi %r4,-1
@ -141,7 +144,10 @@ ENTRY(__memcpy)
j .Lmemcpy_remainder
.Lmemcpy_mvc:
mvc 0(1,%r1),0(%r3)
ENDPROC(__memcpy)
SYM_FUNC_END(__memcpy)
EXPORT_SYMBOL(__memcpy)
SYM_FUNC_ALIAS(memcpy, __memcpy)
EXPORT_SYMBOL(memcpy)
/*