| /* 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 |
| |
| #if ENV_X86_64 |
| asm volatile( |
| "rep ; movsq\n\t" |
| "mov %4,%%rcx\n\t" |
| "rep ; movsb\n\t" |
| : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
| : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) |
| : "memory" |
| ); |
| #else |
| asm volatile( |
| "rep ; movsl\n\t" |
| "movl %4,%%ecx\n\t" |
| "rep ; movsb\n\t" |
| : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
| : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) |
| : "memory" |
| ); |
| #endif |
| |
| |
| return dest; |
| } |