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This implements svcMapPhysicalMemory/svcUnmapPhysicalMemory for Yuzu, which can be used to map memory at a desired address by games since 3.0.0. It also properly parses SystemResourceSize from NPDM, and makes information available via svcGetInfo. This is needed for games like Super Smash Bros. and Diablo 3 -- this PR's implementation does not run into the "ASCII reads" issue mentioned in the comments of #2626, which was caused by the following bugs in Yuzu's memory management that this PR also addresses: * Yuzu's memory coalescing does not properly merge blocks. This results in a polluted address space/svcQueryMemory results that would be impossible to replicate on hardware, which can lead to game code making the wrong assumptions about memory layout. * This implements better merging for AllocatedMemoryBlocks. * Yuzu's implementation of svcMirrorMemory unprotected the entire virtual memory range containing the range being mirrored. This could lead to games attempting to map data at that unprotected range/attempting to access that range after yuzu improperly unmapped it. * This PR fixes it by simply calling ReprotectRange instead of Reprotect. |
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yuzu emulator
yuzu is an experimental open-source emulator for the Nintendo Switch from the creators of Citra.
It is written in C++ with portability in mind, with builds actively maintained for Windows, Linux and macOS. The emulator is currently only useful for homebrew development and research purposes.
yuzu only emulates a subset of Switch hardware and therefore is generally only useful for running/debugging homebrew applications. yuzu can boot some games, to varying degrees of success.
yuzu is licensed under the GPLv2 (or any later version). Refer to the license.txt file included.
Check out our website!
For development discussion, please join us on Discord.
Development
Most of the development happens on GitHub. It's also where our central repository is hosted.
If you want to contribute please take a look at the Contributor's Guide and Developer Information. You should as well contact any of the developers on Discord in order to know about the current state of the emulator.
Building
- Windows: Windows Build
- Linux: Linux Build
- macOS: macOS Build
Support
We happily accept monetary donations or donated games and hardware. Please see our donations page for more information on how you can contribute to yuzu. Any donations received will go towards things like:
- Switch consoles to explore and reverse-engineer the hardware
- Switch games for testing, reverse-engineering, and implementing new features
- Web hosting and infrastructure setup
- Software licenses (e.g. Visual Studio, IDA Pro, etc.)
- Additional hardware (e.g. GPUs as-needed to improve rendering support, other peripherals to add support for, etc.)
We also more than gladly accept used Switch consoles, preferably ones with firmware 3.0.0 or lower! If you would like to give yours away, don't hesitate to join our Discord and talk to bunnei. You may also contact: donations@yuzu-emu.org.