mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-05 19:51:45 +00:00
109 lines
No EOL
4.1 KiB
C++
109 lines
No EOL
4.1 KiB
C++
/*
|
|
* Copyright (c) 2018 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <switch.h>
|
|
#include "dmnt_cheat_types.hpp"
|
|
#include "dmnt_cheat_vm.hpp"
|
|
|
|
bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
|
|
/* TODO: Parse opcodes */
|
|
return false;
|
|
}
|
|
|
|
void DmntCheatVm::SkipConditionalBlock() {
|
|
CheatVmOpcode skip_opcode;
|
|
while (this->DecodeNextOpcode(&skip_opcode)) {
|
|
/* Decode instructions until we see end of conditional block. */
|
|
/* NOTE: This is broken in gateway's implementation. */
|
|
/* Gateway currently checks for "0x2" instead of "0x20000000" */
|
|
/* In addition, they do a linear scan instead of correctly decoding opcodes. */
|
|
/* This causes issues if "0x2" appears as an immediate in the conditional block... */
|
|
if (skip_opcode.opcode == CheatVmOpcodeType_EndConditionalBlock) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
|
|
CheatVmOpcode cur_opcode;
|
|
u64 kDown = 0;
|
|
|
|
/* TODO: Get Keys down. */
|
|
|
|
/* Clear VM state. */
|
|
for (size_t i = 0; i < DmntCheatVm::NumRegisters; i++) {
|
|
this->registers[i] = 0;
|
|
this->loop_tops[i] = 0;
|
|
}
|
|
|
|
/* Loop until program finishes. */
|
|
while (this->DecodeNextOpcode(&cur_opcode)) {
|
|
switch (cur_opcode.opcode) {
|
|
case CheatVmOpcodeType_StoreStatic:
|
|
{
|
|
/* TODO */
|
|
}
|
|
break;
|
|
case CheatVmOpcodeType_BeginConditionalBlock:
|
|
{
|
|
/* TODO */
|
|
}
|
|
break;
|
|
case CheatVmOpcodeType_EndConditionalBlock:
|
|
/* There is nothing to do here. Just move on to the next instruction. */
|
|
break;
|
|
case CheatVmOpcodeType_ControlLoop:
|
|
if (cur_opcode.ctrl_loop.start_loop) {
|
|
/* Start a loop. */
|
|
this->registers[cur_opcode.ctrl_loop.register_index] = cur_opcode.ctrl_loop.num_iters;
|
|
this->loop_tops[cur_opcode.ctrl_loop.register_index] = this->instruction_ptr;
|
|
} else {
|
|
/* End a loop. */
|
|
this->registers[cur_opcode.ctrl_loop.register_index]--;
|
|
if (this->registers[cur_opcode.ctrl_loop.register_index] != 0) {
|
|
this->instruction_ptr = this->loop_tops[cur_opcode.ctrl_loop.register_index];
|
|
}
|
|
}
|
|
break;
|
|
case CheatVmOpcodeType_LoadRegisterStatic:
|
|
/* Set a register to a static value. */
|
|
this->registers[cur_opcode.ldr_static.register_index] = cur_opcode.ldr_static.value;
|
|
break;
|
|
case CheatVmOpcodeType_LoadRegisterMemory:
|
|
{
|
|
/* TODO */
|
|
}
|
|
break;
|
|
case CheatVmOpcodeType_StoreToRegisterAddress:
|
|
{
|
|
/* TODO */
|
|
}
|
|
break;
|
|
case CheatVmOpcodeType_PerformArithmetic:
|
|
{
|
|
/* TODO */
|
|
}
|
|
break;
|
|
case CheatVmOpcodeType_BeginKeypressConditionalBlock:
|
|
/* Check for keypress. */
|
|
if ((cur_opcode.begin_keypress_cond.key_mask & kDown) != cur_opcode.begin_keypress_cond.key_mask) {
|
|
/* Keys not pressed. Skip conditional block. */
|
|
this->SkipConditionalBlock();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} |