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Wow64: Implement support for breakpoints

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Passes my instruction breakpoint test properly.
This commit is contained in:
Ryan Houdek committed 2026-11-02 17:19:24 -08:00
1 parent c2181679c9
commit 18cc74cae2
1 file changed
+64
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Source/Windows/WOW64/Module.cpp
+64
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@@ -246,6 +246,62 @@ void LoadStateFromWowContext(FEXCore::Core::InternalThreadState* Thread) {
State.flags[FEXCore::X86State::X87FLAG_C3_LOC] = (XSave->StatusWord >> 14) & 1;
State.flags[FEXCore::X86State::X87FLAG_TOP_LOC] = (XSave->StatusWord >> 11) & 0b111;
State.AbridgedFTW = XSave->TagWord;
// If any of the debug register state changed then we need to invalidate.
const bool Dr0Changed = (Context->Dr0 != State.Dr[0]) || ((Context->Dr7 ^ State.Dr7) & ((0b1111 << 16) | (0b11 << 0)));
const bool Dr1Changed = (Context->Dr1 != State.Dr[1]) || ((Context->Dr7 ^ State.Dr7) & ((0b1111 << 20) | (0b11 << 2)));
const bool Dr2Changed = (Context->Dr2 != State.Dr[2]) || ((Context->Dr7 ^ State.Dr7) & ((0b1111 << 24) | (0b11 << 4)));
const bool Dr3Changed = (Context->Dr3 != State.Dr[3]) || ((Context->Dr7 ^ State.Dr7) & ((0b1111 << 28) | (0b11 << 6)));
if (Dr0Changed || Dr1Changed || Dr2Changed || Dr3Changed) {
std::scoped_lock Lock(ThreadCreationMutex);
// Need to clear both context and state addresses if changed.
// Only if the BP type was instruction class.
if (Dr0Changed) {
if (Context->Dr0 && ((Context->Dr7 >> 16) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(Context->Dr0, 8, false);
}
if (State.Dr[0] && ((State.Dr7 >> 16) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(State.Dr[0], 8, false);
}
}
if (Dr1Changed) {
if (Context->Dr1 && ((Context->Dr7 >> 20) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(Context->Dr1, 8, false);
}
if (State.Dr[1] && ((State.Dr7 >> 20) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(State.Dr[1], 8, false);
}
}
if (Dr2Changed) {
if (Context->Dr2 && ((Context->Dr7 >> 24) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(Context->Dr2, 8, false);
}
if (State.Dr[2] && ((State.Dr7 >> 24) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(State.Dr[2], 8, false);
}
}
if (Dr3Changed) {
if (Context->Dr3 && ((Context->Dr7 >> 28) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(Context->Dr3, 8, false);
}
if (State.Dr[3] && ((State.Dr7 >> 28) & 0b11) == 0) {
InvalidationTracker->InvalidateAlignedInterval(State.Dr[3], 8, false);
}
}
}
// Update context now that we have invalidated.
State.Dr[0] = Context->Dr0;
State.Dr[1] = Context->Dr1;
State.Dr[2] = Context->Dr2;
State.Dr[3] = Context->Dr3;
State.Dr6 = Context->Dr6;
State.Dr7 = Context->Dr7;
}
void StoreWowContextFromState(WOW64_CONTEXT* Context) {
@@ -294,6 +350,14 @@ void StoreWowContextFromState(WOW64_CONTEXT* Context) {
Context->FloatSave.DataOffset = XSave->DataOffset;
Context->FloatSave.DataSelector = XSave->DataSelector;
Context->FloatSave.Cr0NpxState = XSave->StatusWord | 0xffff0000;
// Save the debug register state to the context.
Context->Dr0 = State.Dr[0];
Context->Dr1 = State.Dr[1];
Context->Dr2 = State.Dr[2];
Context->Dr3 = State.Dr[3];
Context->Dr6 = State.Dr6;
Context->Dr7 = State.Dr7;
}
void FlushThreadStateContext() {