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RPCS3 Guest Memory Dumper

Jul 2026 · Merged upstream, shipped in RPCS3 v0.0.42

A reverse-engineering utility I wrote for the RPCS3 PlayStation 3 emulator. It dumps all allocated guest memory and every SPU local store into a sparse image whose file offsets match PS3 guest addresses, with a JSON manifest of regions. Merged into RPCS3 and shipped in a tagged release.

Tools: C++ · Qt · PS3 internals

GitHub RPCS3 on GitHub

More info

Why

When you are statically recompiling a game you constantly need to look at what the real thing has in memory at a given moment: which segments are mapped, what the SPU local stores contain, where a structure lives. RPCS3 could pause a game but had no clean way to export that state.

What it does

Walks the emulator's guest memory map and writes every allocated region to a sparse file, so a 4 GB address space does not become a 4 GB file.
File offsets equal guest addresses, so any address you see in a disassembler maps straight to the dump.
Captures each SPU's 256 KB local store as well.
Writes a JSON manifest describing every region (address, size, flags, origin) next to the image.

Outcome

Reviewed and merged by the RPCS3 maintainers as pull request #19068, and shipped in tagged release v0.0.42.

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