55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/**************************************************************
|
|
_ __ _ _
|
|
_ __ ___| |_ _ __ ___ / _| ___ _ __| |_| |__
|
|
| '__/ _ \ __| '__/ _ \| |_ / _ \| '__| __| '_ \
|
|
| | | __/ |_| | | (_) | _| (_) | | | |_| | | |
|
|
|_| \___|\__|_| \___/|_| \___/|_| \__|_| |_|
|
|
for nga
|
|
|
|
(c) Charles Childers, Luke Parrish, Marc Simpsonn,
|
|
Jay Skeer, Kenneth Keating
|
|
|
|
**************************************************************/
|
|
|
|
|
|
/*
|
|
| 001 | Data Stack Underflow |
|
|
| 002 | Data Stack Overflow |
|
|
| 003 | Address Stack Underflow |
|
|
| 004 | Address Stack Overflow |
|
|
| 005 | Invalid Memory Access |
|
|
| 006 | Division by Zero |
|
|
*/
|
|
|
|
#ifdef ENABLE_ERROR
|
|
V execute(NgaState *vm, CELL cell);
|
|
|
|
V handle_error(NgaState *vm, CELL error) {
|
|
CELL saved_ip = vm->cpu[vm->active].ip;
|
|
if (vm->ErrorHandlers[error] != 0) {
|
|
printf("\nHandling %lld\n", (long long)error);
|
|
execute(vm, vm->ErrorHandlers[error]);
|
|
}
|
|
vm->cpu[vm->active].ip = saved_ip;
|
|
}
|
|
|
|
V register_error_handler(NgaState *vm) {
|
|
CELL ErrorID = stack_pop(vm);
|
|
CELL ErrorHandler = stack_pop(vm);
|
|
vm->ErrorHandlers[ErrorID] = ErrorHandler;
|
|
printf("Assigned %lld to %lld\n", (long long)ErrorID, (long long)ErrorHandler);
|
|
}
|
|
|
|
V io_error(NgaState *vm) {
|
|
switch (stack_pop(vm)) {
|
|
case 0: register_error_handler(vm); break;
|
|
default: break;
|
|
}
|
|
}
|
|
|
|
V query_error(NgaState *vm) {
|
|
stack_push(vm, 0);
|
|
stack_push(vm, DEVICE_ERROR);
|
|
}
|
|
|
|
#endif
|