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Merge pull request #3933 from bylaws/arm64-suspend

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Support cooperative suspend on ARM64EC
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Ryan Houdek authored and GitHub committed 2024-08-15 01:22:28 -07:00
2 parents ce88f5f948 ea4004ec9d
commit df0ecad15b
5 files changed
+31 -2
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Source/Windows/ARM64EC/Module.cpp
+10
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@@ -605,6 +605,15 @@ bool ResetToConsistentStateImpl(EXCEPTION_RECORD* Exception, CONTEXT* GuestConte
return true;
}
// The JIT (in CompileBlock) emits code to check the suspend doorbell at the start of every block, and run the following instruction if it is set:
static constexpr uint32_t SuspendTrapMagic {0xD4395FC0}; // brk #0xCAFE
if (Exception->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION && *reinterpret_cast<uint32_t*>(NativeContext->Pc) == SuspendTrapMagic) {
*NativeContext = Exception::ReconstructPackedECContext(*NativeContext);
LogMan::Msg::DFmt("Suspending: RIP: {:X} SP: {:X}", NativeContext->Pc, NativeContext->Sp);
CPUArea.Area->InSimulation = 0;
*CPUArea.Area->SuspendDoorbell = 0;
return true;
}
if (IsEmulatorStackAddress(reinterpret_cast<uint64_t>(__builtin_frame_address(0)))) {
Exception::RethrowGuestException(*Exception, *NativeContext);
@@ -764,6 +773,7 @@ NTSTATUS ThreadInit() {
}
CPUArea.ThreadState() = Thread;
CPUArea.Area->SuspendDoorbell = reinterpret_cast<ULONG*>(&Thread->CurrentFrame->SuspendDoorbell);
return STATUS_SUCCESS;
}