Adding x86 I/O port communication capabilities (see IOPortEvent)

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1295 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

core/SAL/bochs/BochsController.cc

@@ -117,6 +117,28 @@ void BochsController::onInstrPtrChanged(address_t instrPtr, address_t address_sp
 	//       implementation.
 }
 
+void BochsController::onIOPortEvent(unsigned char data, unsigned port, bool out) {
+	// Check for active breakpoint-events:
+	fi::EventList::iterator it = m_EvList.begin();
+	while(it != m_EvList.end())
+	{
+		// FIXME: Maybe we need to improve the performance of this check.
+		fi::IOPortEvent* pIOPt = dynamic_cast<fi::IOPortEvent*>(*it);
+		if(pIOPt && pIOPt->isMatching(port, out))
+		{
+			pIOPt->setData(data);
+			it = m_EvList.makeActive(it);
+			// "it" has already been set to the next element (by calling
+			// makeActive()):
+			continue; // -> skip iterator increment
+		}
+		it++;
+	}
+	m_EvList.fireActiveEvents();
+	// Note: SimulatorController::onBreakpointEvent will not be invoked in this
+	//       implementation.
+}
+
 void BochsController::save(const string& path)
 {
 	int stat;

core/SAL/bochs/BochsController.hpp

@@ -86,9 +86,17 @@ class BochsController : public SimulatorController
 		 * Instruction pointer modification handler. This method is called (from
 		 * the Breakpoints aspect) every time when the Bochs-internal IP changes.
 		 * @param instrPtr the new instruction pointer
-		 * @param address_space
+		 * @param address_space the address space the CPU is currently in
 		 */
 		void onInstrPtrChanged(address_t instrPtr, address_t address_space);
+		/**
+		 * I/O port communication handler. This method is called (from
+		 * the IOPortCom aspect) every time when Bochs performs a port I/O operation.
+		 * @param data the data transmitted
+		 * @param port the port it was transmitted on
+		 * @param out true if the I/O traffic has been outbound, false otherwise
+		 */
+		void onIOPortEvent(unsigned char data, unsigned port, bool out);
 		/**
 		 * This method is called when an experiment flow adds a new event by
 		 * calling \c simulator.addEvent(pev) or \c simulator.addEventAndWait(pev).

core/SAL/bochs/IOPortCom.ah

@@ -0,0 +1,38 @@
+#ifndef __IOPORT_COM_AH__
+#define __IOPORT_COM_AH__
+
+#include "config/FailConfig.hpp"
+
+#ifdef CONFIG_EVENT_IOPORT
+
+#include "../../../bochs/bochs.h"
+#include "../../../bochs/cpu/cpu.h"
+#include "../SALInst.hpp"
+
+#include "bochs_helpers.hpp"
+
+aspect IOPortCom
+{
+// ATM only capturing bytewise output (most common, I suppose)
+	pointcut outInstruction() = "% ...::bx_cpu_c::OUT_DXAL%(...)";
+
+	advice execution (outInstruction()) : after ()
+	{
+		unsigned rDX = getCPU(tjp->that())->gen_reg[2].word.rx; // port number
+		unsigned char rAL = getCPU(tjp->that())->gen_reg[0].word.byte.rl; // data
+		sal::simulator.onIOPortEvent(rAL, rDX, true);
+	}
+
+	pointcut inInstruction() = "% ...::bx_cpu_c::IN_ALDX%(...)";
+
+	advice execution (inInstruction()) : after ()
+	{
+		unsigned rDX = getCPU(tjp->that())->gen_reg[2].word.rx; // port number
+		unsigned char rAL = getCPU(tjp->that())->gen_reg[0].word.byte.rl; // data
+		sal::simulator.onIOPortEvent(rAL, rDX, false);
+	}
+};
+
+#endif // CONFIG_EVENT_IOPORT
+
+#endif /* __IOPORT_COM_AH__ */