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/* SPDX-License-Identifier: GPL-2.0-only */
#include <string.h>
#include <stdbool.h>
#include <asan.h>
void *memcpy(void *dest, const void *src, size_t n)
{
unsigned long d0, d1, d2;
#if (ENV_ROMSTAGE && CONFIG(ASAN_IN_ROMSTAGE)) || \
(ENV_RAMSTAGE && CONFIG(ASAN_IN_RAMSTAGE))
check_memory_region((unsigned long)src, n, false, _RET_IP_);
check_memory_region((unsigned long)dest, n, true, _RET_IP_);
#endif
asm volatile(
#if ENV_X86_64
"rep ; movsd\n\t"
"mov %4,%%rcx\n\t"
#else
"rep ; movsl\n\t"
"movl %4,%%ecx\n\t"
#endif
"rep ; movsb\n\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
: "memory"
);
return dest;
}
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