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[Cpu] Place the guest exception mcontext at the start of the context 

Co-authored-by: Sekai <140012992+SekaixX@users.noreply.github.com>
This commit is contained in:
ParantezTech 2026-10-08 23:44:40 +03:00
parent 3d65921eb7
commit 10254a3c7e
1 changed files with 1 additions and 5 deletions
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6
src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.cs
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@ -5386,11 +5386,7 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
BinaryPrimitives.WriteUInt64LittleEndian(bytes.AsSpan(offset, sizeof(ulong)), value);
var hasContinuation = continuation.Rip >= 65536 && continuation.Rsp != 0;
// Orbis ucontext_t has a 0x10-byte signal mask and 0x30 bytes of
// private fields before its amd64 mcontext. These offsets match the
// platform ABI used by libScePs5Util and Unity's Boehm GC. Supplying a
// bare mcontext here makes the collector miss live register roots.
const int mcontext = 0x40;
const int mcontext = 0;
Write64(mcontext + 0x08, hasContinuation ? continuation.Rdi : context[CpuRegister.Rdi]);
Write64(mcontext + 0x10, hasContinuation ? continuation.Rsi : context[CpuRegister.Rsi]);
Write64(mcontext + 0x18, hasContinuation ? continuation.Rdx : context[CpuRegister.Rdx]);