Slick Daddy 33be88bdf9 memory: back the free pages of a partially-overlapping fixed mapping (#458) ...

A SCE_KERNEL_MAP_FIXED request whose window partially overlaps an
existing allocation was failing outright: AllocateAt reserves the whole
range in one all-or-nothing VirtualAlloc, which returns 0 on partial
overlap. The mapping call then returned NOT_FOUND while leaving the free
tail unmapped, so the guest faulted (0xC0000005) writing into it.

Add IGuestAddressSpace.TryBackFixedRange, which walks the range via the
host Query (VirtualQuery reports contiguous same-state runs) and fills
only the free sub-ranges, leaving already-backed pages untouched. This
matches the fixed-mapping contract on hardware. Route the fixed
reservation path through it via a new backPartialOverlap flag.

Co-authored-by: slick-daddy <slick-daddy@users.noreply.github.com>

2026-07-20 09:08:29 +03:00

..

SharpEmu.Libs.Tests

memory: back the free pages of a partially-overlapping fixed mapping (#458)

2026-07-20 09:08:29 +03:00

SharpEmu.ShaderCompiler.Metal.Tests

[Gpu] Metal backend: complete IGuestGpuBackend implementation on AppKit + Metal (#283)

2026-07-18 20:32:00 +03:00

SharpEmu.SourceGenerators.Tests

[SourceGenerators] Compile-time SysAbi export registry, analyzers, and build-generated aerolib.bin (#204)

2026-07-16 00:00:32 +03:00