forked from luck/tmp_suning_uos_patched
32bb954dbf
Many uses of strncpy() on xtensa causes a warning like arch/xtensa/include/asm/string.h:56:42: warning: array subscript is above array bounds [-Warray-bounds] : "0" (__dest), "1" (__src), "r" (__src+__n) This avoids the warning by turning the pointer arithmetic into an integer operation that does not get checked the same way. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*
|
|
* include/asm-xtensa/string.h
|
|
*
|
|
* These trivial string functions are considered part of the public domain.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2001 - 2005 Tensilica Inc.
|
|
*/
|
|
|
|
/* We should optimize these. See arch/xtensa/lib/strncpy_user.S */
|
|
|
|
#ifndef _XTENSA_STRING_H
|
|
#define _XTENSA_STRING_H
|
|
|
|
#define __HAVE_ARCH_STRCPY
|
|
static inline char *strcpy(char *__dest, const char *__src)
|
|
{
|
|
register char *__xdest = __dest;
|
|
unsigned long __dummy;
|
|
|
|
__asm__ __volatile__("1:\n\t"
|
|
"l8ui %2, %1, 0\n\t"
|
|
"s8i %2, %0, 0\n\t"
|
|
"addi %1, %1, 1\n\t"
|
|
"addi %0, %0, 1\n\t"
|
|
"bnez %2, 1b\n\t"
|
|
: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
|
|
: "0" (__dest), "1" (__src)
|
|
: "memory");
|
|
|
|
return __xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCPY
|
|
static inline char *strncpy(char *__dest, const char *__src, size_t __n)
|
|
{
|
|
register char *__xdest = __dest;
|
|
unsigned long __dummy;
|
|
|
|
if (__n == 0)
|
|
return __xdest;
|
|
|
|
__asm__ __volatile__(
|
|
"1:\n\t"
|
|
"l8ui %2, %1, 0\n\t"
|
|
"s8i %2, %0, 0\n\t"
|
|
"addi %1, %1, 1\n\t"
|
|
"addi %0, %0, 1\n\t"
|
|
"beqz %2, 2f\n\t"
|
|
"bne %1, %5, 1b\n"
|
|
"2:"
|
|
: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
|
|
: "0" (__dest), "1" (__src), "r" ((uintptr_t)__src+__n)
|
|
: "memory");
|
|
|
|
return __xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCMP
|
|
static inline int strcmp(const char *__cs, const char *__ct)
|
|
{
|
|
register int __res;
|
|
unsigned long __dummy;
|
|
|
|
__asm__ __volatile__(
|
|
"1:\n\t"
|
|
"l8ui %3, %1, 0\n\t"
|
|
"addi %1, %1, 1\n\t"
|
|
"l8ui %2, %0, 0\n\t"
|
|
"addi %0, %0, 1\n\t"
|
|
"beqz %2, 2f\n\t"
|
|
"beq %2, %3, 1b\n"
|
|
"2:\n\t"
|
|
"sub %2, %2, %3"
|
|
: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
|
|
: "0" (__cs), "1" (__ct));
|
|
|
|
return __res;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCMP
|
|
static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
|
|
{
|
|
register int __res;
|
|
unsigned long __dummy;
|
|
|
|
__asm__ __volatile__(
|
|
"mov %2, %3\n"
|
|
"1:\n\t"
|
|
"beq %0, %6, 2f\n\t"
|
|
"l8ui %3, %1, 0\n\t"
|
|
"addi %1, %1, 1\n\t"
|
|
"l8ui %2, %0, 0\n\t"
|
|
"addi %0, %0, 1\n\t"
|
|
"beqz %2, 2f\n\t"
|
|
"beqz %3, 2f\n\t"
|
|
"beq %2, %3, 1b\n"
|
|
"2:\n\t"
|
|
"sub %2, %2, %3"
|
|
: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
|
|
: "0" (__cs), "1" (__ct), "r" ((uintptr_t)__cs+__n));
|
|
|
|
return __res;
|
|
}
|
|
|
|
#define __HAVE_ARCH_MEMSET
|
|
extern void *memset(void *__s, int __c, size_t __count);
|
|
extern void *__memset(void *__s, int __c, size_t __count);
|
|
|
|
#define __HAVE_ARCH_MEMCPY
|
|
extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
|
|
extern void *__memcpy(void *__to, __const__ void *__from, size_t __n);
|
|
|
|
#define __HAVE_ARCH_MEMMOVE
|
|
extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
|
|
extern void *__memmove(void *__dest, __const__ void *__src, size_t __n);
|
|
|
|
/* Don't build bcopy at all ... */
|
|
#define __HAVE_ARCH_BCOPY
|
|
|
|
#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
|
|
|
|
/*
|
|
* 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)
|
|
|
|
#ifndef __NO_FORTIFY
|
|
#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
|
|
#endif
|
|
#endif
|
|
|
|
#endif /* _XTENSA_STRING_H */
|