and the decompiler has misinterpreted it as a longlong because of the access patterns (64bit pointers). So I think this might be part of an initialization function for some property on top of a object that exists at *param_1. The 0x2b part I'm not sure about myself but it looks like some other kind of similar checks.Īnd actually then thinking about the way it's calling it, i'm wondering if this is actually from some C++ standard library code for doing stuff with a vtable, looking up the vtable entry and checking it's validity before calling it (in this case, location 0x18, and checking some kind of RTTI at 0x28 and 0x2b) and storing that it's been initialized in 0x21. From my memory, the windows ABI uses the first two bytes of functions for installing hooks/debugging by patching the first two bytes into some kind of jump (while originally being nops). This particular one looks like it's taking a function pointer in and checking if it's a valid function (not null) and then checking the first two bytes of the function. The sibling comment covers it a bit more in detail, but it's largely just some guessing and as much an art to figuring out what the types are or could be. (disclosure: per the child post, my original assumption that OpenRCT2 was copied out of Hex-Rays was inaccurate, since it was originally written in assembler it didn't follow a standard C ABI and the decompiler wouldn't work properly anyway). For example, OpenRCT2 started as a repository full of manually created source with Hex-Rays names and slowly evolved module-by-module into readable source code. Launch the ball and use the flippers to make sure the ball stays at work. Highly manual process, for some files it's just pattern matching / renaming and goes really quickly, for others it's full reimplementation and a bit harder.Īnd, if you look at most "decompiled game" projects, I think this is the industry standard way to do this. 3D Pinball is a casual classic pinball game. When I've done this in the past, it basically consists of:ġ) Decompile project using Ghidra/IDA, first pass.Ģ) Load symbols if present (sounds like there was a PDB for this one, which makes things a lot easier).ģ) Read decompilation/asm for unnamed subs and try to name them based on what they do.Ĥ) Export all decompiled source into an editor and start copy/paste/editing into readable source. If the alterations constitute a material change to the Terms of Service, we will notify the User via an update on the website.I'm not aware of any good general-case automation for this. We reserve the right to alter these Terms of Service at any time. We reserve the right to modify or terminate the service for any reason, without notice, at any time. The User will not use the service for any illegal or unauthorized purpose. The User agrees to comply with all applicable laws and regulations in their use of the service. The User will not post or transmit any content that is defamatory, obscene, or otherwise objectionable. The User will not engage in any form of harassment, discrimination, or abuse towards other users. The User agrees to respect the rights and dignity of others. Any violation of these terms may result in temporary or permanent suspension of the User's account. We reserve the right to use the User's IP address for the purposes of enforcing these rules. The User will not attempt to disrupt the service or the experience of other players. The User will not use any software or hardware to gain an unfair advantage in our games. ![]() By using our multiplayer gaming website, you ("the User") agree to the following terms and conditions ("the Agreement").
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