Support for 16k Page Size & 64-bit

[Amonoman]

I am trying to run SLSsteam on Fedora Asahi Remix Apple Silicon M1 using FEX-Emu and Box64 but the current ELFCLASS32 binaries fail to load on this 64-bit ARM host. Additionally the 16k page size of the M1 kernel causes jemalloc to crash with an unsupported system page size error. A native ARM64 port is not necessary as providing an x86_64 64-bit build compiled with the linker flag -Wl,-z,max-page-size=0x4000 would be sufficient to resolve both the architecture mismatch and the memory alignment issues. Please consider adding an x86_64 build target with 16k page support to allow the emulation layer to handle execution correctly and I am happy to test any experimental builds or provide further logs from my setup.

[AceSLS]

Only the beta SteamRT3 Steam client is fully 64 bit on Linux. The stable branch is still using 32 bit. The linker warnings about the Elf class missmatch are expected since Steam uses a mix of 32 bit and 64 bit executables. No clue if the alignment changes will mess anything up though. 64 bit SLSsteam will release once the SteamRT3 enters the stable branch. I might finish it sooner than that but you should not count on it. I will post another comment in this issue when the time has come.

[Amonoman]

Thanks for the clarification! The main issue on Asahi Linux (ARM64) is that 32-bit support is completely unavailable at the hardware/kernel level. We are forced to use 64-bit for everything. If you ever decide to push an experimental 64-bit branch sooner, I’d be more than happy to test the 16k alignment on Apple Silicon!