/*
* Weak aliases for breakpoint management,
* can be overriden by architectures when needed:
*/
char *
arch_set_breakpoint(GdbState *ks, struct bkpt *bpt)
{
char *err;
err = rmem(bpt->saved_instr, ks->threadid, bpt->bpt_addr, machdata->bpsize);
if (err)
return err;
err = wmem(bpt->bpt_addr, ks->threadid, machdata->bpinst, machdata->bpsize);
return err;
}
/*
* Marks all unvisited squares as wall.
* This is used for marking all tiles outside of the enclosed area as wall.
*/
void mark_walls(){
uint8_t i;
uint8_t j;
for(i = 1; i < 31; i++){
for(j = 1; j < 31; j++){
if(visited[i][j] == 0){
wmem(WALL,i,j);
}
}
}
}
std::uint16_t VirtualCPU::executeInstructionAtAddress(std::uint16_t address) {
debugger_.pc_ = address; //HACK FOR NOW
switch (memoryController_.readAtAddress(address)) {
case 0:
return address + halt();
case 1:
return address + set(memoryController_.readAtAddress(address + 1), memoryController_.readAtAddress(address + 2));
case 2:
return address + push(memoryController_.readAtAddress(address + 1));
case 3:
return address + pop(memoryController_.readAtAddress(address + 1));
case 4:
return address +
eq(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
memoryController_.readAtAddress(address + 3));
case 5:
return address + gt(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address +2),
memoryController_.readAtAddress(address + 3));
case 6:
return jump(memoryController_.readAtAddress(address + 1), address);
case 7:
return jt(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
address);
case 8:
return jf(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
address);
case 9:
return address + add(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
memoryController_.readAtAddress(address + 3));
case 10:
return address + mult(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
memoryController_.readAtAddress(address + 3));
case 11:
return address + mod(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
memoryController_.readAtAddress(address + 3));
case 12:
return address + and_i(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
memoryController_.readAtAddress(address + 3));
case 13:
return address + or_i(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2),
memoryController_.readAtAddress(address + 3));
case 14:
return address + not_i(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2));
case 15:
return address + rmem(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2));
case 16:
return address + wmem(memoryController_.readAtAddress(address + 1),
memoryController_.readAtAddress(address + 2));
case 17:
return call(memoryController_.readAtAddress(address + 1), address);
case 18:
return ret();
case 19:
return address + out(memoryController_.readAtAddress(address + 1));
case 21:
return address + noop();
case 20:
return address + in(memoryController_.readAtAddress(address + 1));
default:
std::cout << "CPU ERROR illegal op code: " << memoryController_.readAtAddress(address) << std::endl;
return address + 1;
}
}
char *
arch_remove_breakpoint(GdbState *ks, struct bkpt *bpt)
{
return wmem(bpt->bpt_addr, ks->threadid, bpt->saved_instr, machdata->bpsize);
}
