marfrit
09c4a92432
Extracted from rkbin git (using git show <add-commit>:<path> since each version-update commit deletes the previous binary). Sits here so future runs don't need to re-extract. Byte-diff analysis: v1.x → v1.(x+1) differs in ~88% of bytes. Every release is a near-rewrite, not a patch. Consequence: cross-version symbol porting tools (Polypyus, BinDiff) would match few functions on this target. Function-level opcode-silhouette matching with wildcards for branch targets may still work but needs Ghidra baseline in each version, not a one-sided v1.19 annotation. Polypyus attempted 2026-04-15 — blocked by Python 3.14 / pony 0.7 bytecode decompiler incompatibility (LOAD_FAST_BORROW + varname table layout). Would need pyenv Python 3.11 venv, or switch to BinDiff CLI (no Python dep). Deferred. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Historical RK3588 DDR blob snapshots
Extracted from the rkbin git log for cross-version analysis. v1.19 is the deployed version; v1.16-v1.18 are the closest-in-time prior revisions.
| file | size | commit msg |
|---|---|---|
| v1.16.bin | 75480 B | "update ddrbin to v1.16" — 2736 MHz LP5 dropped |
| v1.17.bin | 73456 B | "update ddrbin to v1.17" — smaller, feature cull |
| v1.18.bin | 75320 B | "update ddrbin to v1.18" — single-rank LPDDR5 derate crash per BUG_ANALYSIS.md |
| v1.19 | 76704 B | current deployed (in rkbin/bin/rk35/) |
Byte-level divergence
Each release is essentially a near-rewrite, NOT a patch:
v1.17 vs v1.18: ~88% bytes differ v1.18 vs v1.19: ~88% bytes differ v1.16 vs v1.19: even higher
This explains why cross-version symbol porting (via Polypyus or BinDiff) has low yield on this target — not enough preserved byte sequences. Function-level fuzzy matching (i.e., reduce each function to an opcode silhouette with wildcards for branch targets and immediates) would help, but requires Ghidra-analysed baselines in each version, not just one-sided v1.19 annotations.
Tooling note (2026-04-15)
Attempted Polypyus → blocked by Python 3.14 / pony 0.7 decompiler
incompatibility. See project_rk3588_ddr.md memory for retry options
(pyenv Python 3.11, or switch to BinDiff CLI which has no Python dep).