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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163// SPDX-License-Identifier: GPL-2.0/* * arch/arm/boot/compressed/string.c * * Small subset of simple string routines */
#define __NO_FORTIFY#include <linux/string.h>
/* * The decompressor is built without KASan but uses the same redirects as the * rest of the kernel when CONFIG_KASAN is enabled, defining e.g. memcpy() * to __memcpy() but since we are not linking with the main kernel string * library in the decompressor, that will lead to link failures. * * Undefine KASan's versions, define the wrapped functions and alias them to * the right names so that when e.g. __memcpy() appear in the code, it will * still be linked to this local version of memcpy(). */#ifdef CONFIG_KASAN#undef memcpy#undef memmove#undef memsetvoid *__memcpy(void *__dest, __const void *__src, size_t __n) __alias(memcpy);void *__memmove(void *__dest, __const void *__src, size_t count) __alias(memmove);void *__memset(void *s, int c, size_t count) __alias(memset);#endif
void *memcpy(void *__dest, __const void *__src, size_t __n){ int i = 0; unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
for (i = __n >> 3; i > 0; i--) { *d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++; }
if (__n & 1 << 2) { *d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++; }
if (__n & 1 << 1) { *d++ = *s++; *d++ = *s++; }
if (__n & 1) *d++ = *s++;
return __dest;}
void *memmove(void *__dest, __const void *__src, size_t count){ unsigned char *d = __dest; const unsigned char *s = __src;
if (__dest == __src) return __dest;
if (__dest < __src) return memcpy(__dest, __src, count);
while (count--) d[count] = s[count]; return __dest;}
size_t strlen(const char *s){ const char *sc = s;
while (*sc != '\0') sc++; return sc - s;}
size_t strnlen(const char *s, size_t count){ const char *sc;
for (sc = s; count-- && *sc != '\0'; ++sc) /* nothing */; return sc - s;}
int memcmp(const void *cs, const void *ct, size_t count){ const unsigned char *su1 = cs, *su2 = ct, *end = su1 + count; int res = 0;
while (su1 < end) { res = *su1++ - *su2++; if (res) break; } return res;}
int strcmp(const char *cs, const char *ct){ unsigned char c1, c2; int res = 0;
do { c1 = *cs++; c2 = *ct++; res = c1 - c2; if (res) break; } while (c1); return res;}
void *memchr(const void *s, int c, size_t count){ const unsigned char *p = s;
while (count--) if ((unsigned char)c == *p++) return (void *)(p - 1); return NULL;}
char *strchr(const char *s, int c){ while (*s != (char)c) if (*s++ == '\0') return NULL; return (char *)s;}
char *strrchr(const char *s, int c){ const char *last = NULL; do { if (*s == (char)c) last = s; } while (*s++); return (char *)last;}
#undef memset
void *memset(void *s, int c, size_t count){ char *xs = s; while (count--) *xs++ = c; return s;}