internal unsafe static void CallHandler(InternalSystem.Exception exception, SharpOS.Korlib.Runtime.ExceptionHandlingClause handler, void *callerBP)
{
uint _callerBP = (uint)callerBP;
uint targetIP = (uint)handler.HandlerBegin;
uint exceptionAddress = (uint)Runtime.GetPointerFromObject(exception);
// The address (EDX) will be then used in the handler
Asm.MOV(R32.EDX, &exceptionAddress);
// Set the address where it will jump to handle the exception
Asm.MOV(R32.ECX, &targetIP);
// This is very dependent of the way the AOT generates the prolog of the method
Asm.MOV(R32.EAX, &_callerBP);
Asm.SUB(R32.EAX, 12);
Asm.MOV(R32.ESP, R32.EAX);
Asm.POP(R32.EDI);
Asm.POP(R32.ESI);
Asm.POP(R32.EBX);
Asm.POP(R32.EBP);
// Just dump the address of the caller
Asm.POP(R32.EAX);
// Assign EAX the address of the exception object
Asm.MOV(R32.EAX, R32.EDX);
// Push target address of the handler
Asm.PUSH(R32.ECX);
Asm.RET();
}
internal unsafe static uint CallFilter(InternalSystem.Exception exception, SharpOS.Korlib.Runtime.ExceptionHandlingClause handler, void *callerBP)
{
uint _callerBP = (uint)callerBP;
uint targetIP = (uint)handler.FilterBegin;
uint exceptionAddress = (uint)Runtime.GetPointerFromObject(exception);
uint result = 0;
// The address (EDX) will be then used in the handler
Asm.MOV(R32.EDX, &exceptionAddress);
// Set the address where it will jump to handle the exception
Asm.MOV(R32.ECX, &targetIP);
// This is very dependent of the way the AOT generates the prolog of the method
Asm.MOV(R32.EAX, &_callerBP);
Asm.PUSH(R32.EBP);
Asm.PUSH(R32.EBX);
Asm.PUSH(R32.ESI);
Asm.PUSH(R32.EDI);
Asm.MOV(R32.EBP, new DWordMemory(null, R32.EAX, null, 0, 0));
Asm.MOV(R32.EBX, new DWordMemory(null, R32.EAX, null, 0, -4));
Asm.MOV(R32.ESI, new DWordMemory(null, R32.EAX, null, 0, -8));
Asm.MOV(R32.EDI, new DWordMemory(null, R32.EAX, null, 0, -12));
// Assign EAX the address of the exception object
Asm.MOV(R32.EAX, R32.EDX);
// Push target address of the handler
Asm.CALL(R32.ECX);
Asm.POP(R32.EDI);
Asm.POP(R32.ESI);
Asm.POP(R32.EBX);
Asm.POP(R32.EBP);
// Get the result of the filter
Asm.MOV(&result, R32.EAX);
return(result);
}
internal unsafe static void CallFinallyFault(InternalSystem.Exception exception, SharpOS.Korlib.Runtime.ExceptionHandlingClause handler, void *callerBP)
{
uint _callerBP = (uint)callerBP;
uint targetIP = (uint)handler.HandlerBegin;
// Set the address where it will jump to handle the exception
Asm.MOV(R32.ECX, &targetIP);
// This is very dependent of the way the AOT generates the prolog of the method
Asm.MOV(R32.EAX, &_callerBP);
Asm.PUSH(R32.EBP);
Asm.PUSH(R32.EBX);
Asm.PUSH(R32.ESI);
Asm.PUSH(R32.EDI);
Asm.MOV(R32.EBP, new DWordMemory(null, R32.EAX, null, 0, 0));
Asm.MOV(R32.EBX, new DWordMemory(null, R32.EAX, null, 0, -4));
Asm.MOV(R32.ESI, new DWordMemory(null, R32.EAX, null, 0, -8));
Asm.MOV(R32.EDI, new DWordMemory(null, R32.EAX, null, 0, -12));
// Push target address of the handler
Asm.CALL(R32.ECX);
Asm.POP(R32.EDI);
Asm.POP(R32.ESI);
Asm.POP(R32.EBX);
Asm.POP(R32.EBP);
}