diff options
Diffstat (limited to 'kmod/util.c')
| -rwxr-xr-x | kmod/util.c | 39 |
1 files changed, 8 insertions, 31 deletions
diff --git a/kmod/util.c b/kmod/util.c index 1932c9b..de87d3b 100755 --- a/kmod/util.c +++ b/kmod/util.c @@ -1,41 +1,18 @@ #include "util.h" -static size_t random_pos = 0; -static uint8_t random[] = { 90, 227, 179, 229, 27, 117, 69, 81, 188, 253, 129, 140, 140, 180, 191, 152, 194, 98, 169, 205, 254, 155, 249, 81, 208, 245, 186, 80, 81, 50, 63, 67, 200, 108, 70, 32, 239, 158, 38, 234, 183, 130, 141, 175, 39, 230, 107, 199, 59, 43, 238, 122, 103, 25, 184, 66, 31, 239, 57, 92, 119, 101, 147, 188, 171, 112, 209, 227, 92, 224, 9, 150, 220, 10, 154, 92, 86, 39, 154, 140, 65, 57, 158, 47, 142, 168, 222, 200, 69, 183, 160, 249, 103, 45, 241, 112, 49, 85, 2, 73, 255, 16, 132, 215, 190, 143, 215, 128, 119, 75, 136, 112, 67, 27, 213, 78, 127, 1, 197, 18, 122, 216, 123, 244, 11, 154, 124, 212, 171, 29, 184, 45, 42, 128, 124, 168, 112, 191, 139, 136, 20, 127, 169, 75, 220, 4, 162, 207, 80, 147, 25, 39, 232, 219, 100, 13, 199, 88, 19, 40, 141, 2, 16, 109, 40, 127, 47, 60, 221, 151, 156, 115, 182, 198, 231, 193, 36, 89, 127, 31, 187, 47, 109, 70, 75, 115, 221, 236, 46, 65, 151, 48, 185, 157, 177, 152, 134, 38, 246, 146, 15, 67, 80, 192, 74, 244, 250, 194, 21, 19, 151, 199, 124, 9, 174, 171, 239, 146, 213, 214, 226, 137, 237, 13, 92, 87, 10, 144, 21, 143, 158, 130, 129, 176, 40, 25, 247, 182, 90, 226, 14, 199, 219, 242, 52, 225, 154, 218, 242, 191, 53, 253, 36, 62, 154, 13, 145, 182, 72, 234, 140, 166, 125, 93, 236, 14, 40, 183, 48, 138, 240, 243, 100, 119, 160, 73, 182, 204, 130, 108, 80, 226, 13, 36, 118, 245, 85, 205, 131, 110, 69, 116, 130, 211, 243, 182, 180, 28, 197, 224, 245, 78, 122, 135, 194, 31, 138, 178, 194, 150, 42, 190, 7, 217, 100, 19, 161, 154, 237, 76, 135, 63, 2, 33, 229, 164, 223, 175, 0, 51, 177, 78, 13, 241, 198, 152, 109, 166, 92, 226, 42, 213, 148, 149, 144, 39, 20, 51, 239, 153, 56, 198, 190, 165, 243, 108, 66, 132, 127, 179, 182, 211, 207, 107, 223, 188, 198, 103, 147, 127, 87, 187, 137, 123, 72, 141, 156, 28, 76, 234, 244, 108, 176, 227, 221, 26, 110, 81, 28, 187, 14, 24, 82, 218, 201, 156, 20, 184, 105, 117, 188, 132, 243, 11, 13, 188, 243, 181, 98, 136, 124, 152, 254, 228, 221, 114, 140, 103, 44, 55, 147, 227, 241, 96, 198, 27, 98, 35, 179, 6, 244, 17, 152, 128, 44, 75, 8, 18, 122, 79, 244, 210, 8, 168, 99, 80, 19, 100, 38, 6, 243, 216, 200, 105, 164, 29, 171, 232, 247, 218, 17, 133, 232, 68, 140, 100, 106, 49, 17, 90, 178, 38, 69, 238, 23, 174, 180, 90, 18, 12, 71, 45, 101, 200, 83, 77, 95, 218, 91, 176, 63, 179, 203, 125, 56, 171, 218, 98, 135, 127, 214, 63, 41, 151, 197, 157, 192, 152, 67, 67, 157, 54, 123, 111, 118, 45, 94, 15, 81, 123, 125, 169, 67, 50, 150, 113, 147, 13, 16, 86, 2, 135, 129, 88, 154, 246, 170, 223, 47, 247, 190, 187, 35, 213, 194, 67, 226, 181, 208, 135, 75, 30, 233, 136, 45, 222, 121, 60, 157, 48, 171, 244, 52, 40, 187, 8, 23, 173, 41, 157, 165, 158, 92, 139, 22, 95, 72, 164, 142, 213, 156, 102, 196, 108, 228, 203, 99, 72, 254, 173, 37, 212, 150, 145, 104, 76, 117, 242, 185, 180, 108, 50, 188, 206, 40, 52, 55, 147, 240, 89, 248, 203, 110, 237, 24, 88, 63, 99, 224, 121, 229, 90, 253, 12, 72, 24, 3, 247, 127, 35, 178, 198, 80, 151, 223, 243, 195, 114, 5, 134, 250, 85, 182, 154, 206, 41, 53, 50, 59, 174, 117, 203, 200, 33, 182, 230, 147, 101, 36, 111, 23, 187, 130, 16, 211, 90, 102, 207, 154, 140, 123, 212, 66, 45, 35, 165, 139, 109, 169, 226, 210, 115, 16, 92, 196, 31, 245, 154, 110, 181, 161, 126, 184, 177, 237, 125, 181, 71, 120, 86, 222, 179, 133, 113, 72, 206, 157, 89, 162, 80, 164, 223, 38, 17, 238, 114, 188, 125, 69, 1, 28, 126, 249, 180, 189, 144, 215, 152, 89, 92, 62, 98, 151, 242, 46, 48, 162, 3, 95, 211, 122, 217, 36, 235, 109, 100, 94, 233, 173, 150, 71, 125, 201, 168, 4, 180, 248, 249, 240, 50, 206, 242, 169, 201, 31, 137, 198, 93, 241, 219, 11, 9, 1, 229, 249, 194, 67, 41, 143, 117, 103, 238, 247, 72, 178, 21, 193, 146, 119, 159, 21, 253, 206, 66, 186, 60, 200, 102, 179, 117, 103, 32, 0, 116, 31, 133, 129, 127, 38, 5, 177, 195, 25, 23, 86, 29, 222, 53, 0, 140, 179, 118, 239, 141, 237, 122, 80, 200, 92, 47, 15, 58, 167, 26, 37, 146, 254, 3, 74, 148, 159, 221, 38, 68, 110, 98, 82, 16, 171, 232, 139, 72, 87, 114, 113, 61, 210, 82, 180, 196, 8, 14, 249, 185, 159, 253, 166, 200, 82, 176, 112, 173, 246, 40, 22, 202, 140, 76, 60, 92, 225, 10, 198, 41, 26, 223, 250, 181, 135, 196, 230, 10, 103, 197, 128, 155, 148, 121, 150, 51, 196, 143, 183, 153, 229, 93, 118, 12, 235, 237, 105, 73, 27, 24, 86, 248, 39, 190, 71, 184, 212, 74, 196, 181, 46, 140, 9, 18, 168, 110, 30, 93, 166, 44, 153, 88, 82, 148, 237, 146, 173, 158, 29, 215, 202, 3, 224, 240, 186, 202, 52, 123, 244, 226, 109, 79, 174, 245, 35, 242, 82, 187, 101, 69, 245, 104, 139, 118, 134, 236, 135, 243, 10, 149, 162, 212, 245, 132, 3, 90, 38, 96, 28, 98, 200, 80, 141, 252, 40, 214, 80, 152, 221, 239, 166, 135, 104, 105, 227, 248, 102, 53, 78, 186, 95, 15, 97, 58, 129, 98, 219, 233, 167, 89, 198, 175, 98, 77, 20, 182, 112, 104, 165, 34 }; - -void -prng_bytes(uint8_t *dst, size_t size) -{ - size_t i; - - if (random_pos + size > sizeof(random)) - random_pos = 0; - - for (i = 0; i < size; i++) - dst[i] = random[random_pos + i]; - - random_pos += size; -} - void random_perm(uint32_t *arr, uint32_t arr_len) { - uint32_t i, mid; // idx, tmp; + uint32_t i, mid; - /* defeat stream prefetcher by preventing access direction */ - mid = arr_len / 2; - for (i = 0; i < arr_len; i++) { - arr[i] = mid + (i % 2 ? -1 : 1) * ((i + 1) / 2); - } - - // for (i = arr_len - 1; i > 0; --i) { - // prng_bytes((void*)&idx, 4); - // idx = idx % i; + /* no special ordering needed when prefetcher is disabled */ + for (i = 0; i < arr_len; i++) + arr[i] = i; - // tmp = arr[idx]; - // arr[idx] = arr[i]; - // arr[i] = tmp; - // } + // /* prevent stream prefetching by alternating access direction */ + // mid = arr_len / 2; + // for (i = 0; i < arr_len; i++) + // arr[i] = mid + (i % 2 ? -1 : 1) * ((i + 1) / 2); } void |