pyr0ball
27174a1c79
Diagnosed and fixed the crash that killed HAVOC_NOCD.EXE ~1s after launch
(dgVoodoo window appears black, then the process exits). It was not a clean
exit: an ACCESS_VIOLATION (null-pointer read at VA 0x444E6A) during init.
Root cause is a copy-protection check in the WORLDS\ data-file loader
(0x42a480). It opens each file (GRAFIX/LAND/MAP/STUF) from both a local
"WORLDS\<name>" path and a CD-drive path (HAVOC.INI [SETUP] DRIVE=D:\), and
returns a valid stream only when the local open fails and the CD-drive open
succeeds. With files present locally and no D: drive it returned NULL, and the
GRAFIX loader (0x444db0) dereferenced that NULL without checking.
Fix: 14-byte patch at FO 0x29a2b rewrites the return decision to hand back the
successfully-opened local object. The game now boots to the title screen
("HAVOC(tm) by Reality Bytes"), responsive, main loop running.
- docs/PATCHES.md: full patch table (28 patches) + crash write-up
- tools/: RE + patching scripts (r2pipe disasm, minidump parser, ctypes
debugger, PE/IAT/import analysis)
- run_probe.bat / run_and_log.bat: reliable native launch for repro
- .gitignore: exclude CD images, Ghidra install/project, dgVoodoo, *.ini
Diagnosed via WER minidumps (%LOCALAPPDATA%\CrashDumps) parsed in pure Python
(no cdb/windbg available).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TN4Ytn3gdWRonNmHpisWQv
67 lines
991 B
Text
67 lines
991 B
Text
# --- Original game data (copyright Reality Bytes, Inc. 1995) — DO NOT COMMIT ---
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*.EXE
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*.exe
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*.DLL
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*.dll
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*.VXD
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*.FF
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*.DAT
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*.MAP
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*.ICO
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*.INF
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*.INI
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*.ini
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.windows-serial
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BIGFILE.DAT
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WORLDS/
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DIRECTX/
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LICENSE.TXT
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# --- CD images (copyright) ---
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*.cue
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*.bin
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tmp_cd/
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# --- Third-party (dgVoodoo2 DirectDraw wrapper) - not ours to redistribute ---
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dgVoodoo.conf
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dgVoodooCpl.exe
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ddraw.dll
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DSETUP*.DLL
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# --- Ghidra: install is third-party; project + decompile output embed the binary ---
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ghidra/
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tools/ghidra_*/
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tools/ghidra_decompile.txt
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# --- Derived audio / extracted assets (also copyrighted) ---
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tools/out_*/
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tools/Havoc_*/
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*.wav
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*.ogg
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*.mp3
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*.mid
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*.zip
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# --- Python / tooling cruft ---
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__pycache__/
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*.pyc
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.venv/
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venv/
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# --- Godot ---
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.godot/
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*.import
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export_presets.cfg
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# --- Reference material (third-party copyrighted screenshots) — local only ---
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tools/refs/
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# --- Claude Code local session/settings ---
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.claude/
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# --- Editor / OS ---
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.vscode/
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.idea/
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*.swp
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.DS_Store
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Thumbs.db
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