Mask top 5 bits of PC for symbols

src/emulator/shrooms_vb_core.rs

@@ -261,7 +261,7 @@ extern "C" fn on_exception(sim: *mut VB, cause: *mut u16) -> c_int {
     };
     data.monitor.event = data.monitor.queued_event.take();
     data.monitor.new_inline_stack = data.monitor.detect_new_inline_stack(pc);
-    data.monitor.queued_event = Some(SimEvent::Interrupt(cause, pc));
+    data.monitor.queued_event = Some(SimEvent::Interrupt(cause, pc & 0x07ffffff));
     unsafe { vb_set_exception_callback(sim, None) };
     if data.monitor.event.is_some() || data.monitor.new_inline_stack.is_some() {
         1
@@ -439,7 +439,9 @@ impl EventMonitor {
                 // JAL .+4 is how programs get r31 to a known value for indirect calls
                 // (which we detect later.)
                 // Any other JAL is a function call.
-                return Some(SimEvent::Call(address.wrapping_add_signed(disp)));
+                return Some(SimEvent::Call(
+                    address.wrapping_add_signed(disp) & 0x07ffffff,
+                ));
             }
         }
 
@@ -453,7 +455,7 @@ impl EventMonitor {
             if r31 as u32 == address.wrapping_add(2) {
                 // JMP anywhere else, if r31 points to after the JMP, is an indirect call
                 let target = unsafe { vb_get_program_register(sim, jmp_reg as u32) };
-                return Some(SimEvent::Call(target as u32));
+                return Some(SimEvent::Call(target as u32 & 0x07ffffff));
             }
         }