Patrick Georgi | 11f0079 | 2020-03-04 15:10:45 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Martin Roth | 9df9e939 | 2016-01-12 15:55:28 -0700 | [diff] [blame] | 2 | |
Stefan Reinauer | 0054afa | 2011-10-25 23:43:34 +0000 | [diff] [blame] | 3 | #include <string.h> |
Harshit Sharma | 51593dd | 2020-08-08 17:51:59 -0700 | [diff] [blame] | 4 | #include <stdbool.h> |
| 5 | #include <asan.h> |
Stefan Reinauer | 0054afa | 2011-10-25 23:43:34 +0000 | [diff] [blame] | 6 | |
Mathias Krause | dd30acd | 2012-03-31 17:23:53 +0200 | [diff] [blame] | 7 | void *memcpy(void *dest, const void *src, size_t n) |
Stefan Reinauer | 0054afa | 2011-10-25 23:43:34 +0000 | [diff] [blame] | 8 | { |
Mathias Krause | dd30acd | 2012-03-31 17:23:53 +0200 | [diff] [blame] | 9 | unsigned long d0, d1, d2; |
| 10 | |
Harshit Sharma | 51593dd | 2020-08-08 17:51:59 -0700 | [diff] [blame] | 11 | #if (ENV_ROMSTAGE && CONFIG(ASAN_IN_ROMSTAGE)) || \ |
| 12 | (ENV_RAMSTAGE && CONFIG(ASAN_IN_RAMSTAGE)) |
| 13 | check_memory_region((unsigned long)src, n, false, _RET_IP_); |
| 14 | check_memory_region((unsigned long)dest, n, true, _RET_IP_); |
| 15 | #endif |
| 16 | |
Mathias Krause | dd30acd | 2012-03-31 17:23:53 +0200 | [diff] [blame] | 17 | asm volatile( |
Stefan Reinauer | 7c35af2 | 2015-06-17 16:09:10 -0700 | [diff] [blame] | 18 | #ifdef __x86_64__ |
| 19 | "rep ; movsd\n\t" |
| 20 | "mov %4,%%rcx\n\t" |
| 21 | #else |
Stefan Reinauer | 3140961 | 2012-08-22 17:01:08 -0700 | [diff] [blame] | 22 | "rep ; movsl\n\t" |
| 23 | "movl %4,%%ecx\n\t" |
Stefan Reinauer | 7c35af2 | 2015-06-17 16:09:10 -0700 | [diff] [blame] | 24 | #endif |
Stefan Reinauer | 3140961 | 2012-08-22 17:01:08 -0700 | [diff] [blame] | 25 | "rep ; movsb\n\t" |
| 26 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
| 27 | : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) |
Mathias Krause | dd30acd | 2012-03-31 17:23:53 +0200 | [diff] [blame] | 28 | : "memory" |
Stefan Reinauer | 3140961 | 2012-08-22 17:01:08 -0700 | [diff] [blame] | 29 | ); |
Mathias Krause | dd30acd | 2012-03-31 17:23:53 +0200 | [diff] [blame] | 30 | |
| 31 | return dest; |
Stefan Reinauer | 0054afa | 2011-10-25 23:43:34 +0000 | [diff] [blame] | 32 | } |