diff options
Diffstat (limited to 'src/randomenv.cpp')
| -rw-r--r-- | src/randomenv.cpp | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/src/randomenv.cpp b/src/randomenv.cpp index ec42ddabc3..6992c720ff 100644 --- a/src/randomenv.cpp +++ b/src/randomenv.cpp @@ -197,19 +197,30 @@ void AddAllCPUID(CSHA512& hasher) // Iterate over all standard leaves AddCPUID(hasher, 0, 0, ax, bx, cx, dx); // Returns max leaf in ax uint32_t max = ax; - for (uint32_t leaf = 1; leaf <= max; ++leaf) { - for (uint32_t subleaf = 0;; ++subleaf) { + for (uint32_t leaf = 1; leaf <= max && leaf <= 0xFF; ++leaf) { + uint32_t maxsub = 0; + for (uint32_t subleaf = 0; subleaf <= 0xFF; ++subleaf) { AddCPUID(hasher, leaf, subleaf, ax, bx, cx, dx); - // Iterate over subleaves for leaf 4, 11, 13 - if (leaf != 4 && leaf != 11 && leaf != 13) break; - if ((leaf == 4 || leaf == 13) && ax == 0) break; - if (leaf == 11 && (cx & 0xFF00) == 0) break; + // Iterate subleafs for leaf values 4, 7, 11, 13 + if (leaf == 4) { + if ((ax & 0x1f) == 0) break; + } else if (leaf == 7) { + if (subleaf == 0) maxsub = ax; + if (subleaf == maxsub) break; + } else if (leaf == 11) { + if ((cx & 0xff00) == 0) break; + } else if (leaf == 13) { + if (ax == 0 && bx == 0 && cx == 0 && dx == 0) break; + } else { + // For any other leaf, stop after subleaf 0. + break; + } } } // Iterate over all extended leaves AddCPUID(hasher, 0x80000000, 0, ax, bx, cx, dx); // Returns max extended leaf in ax uint32_t ext_max = ax; - for (uint32_t leaf = 0x80000001; leaf <= ext_max; ++leaf) { + for (uint32_t leaf = 0x80000001; leaf <= ext_max && leaf <= 0x800000FF; ++leaf) { AddCPUID(hasher, leaf, 0, ax, bx, cx, dx); } } |