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dmnt-cheat: skeleton decode, fix missing libnx call

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This commit is contained in:
Michael Scire 2019-03-03 06:44:21 -08:00
parent bc6ad53018
commit af70a4a3a3
3 changed files with 103 additions and 7 deletions
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100
stratosphere/dmnt/source/dmnt_cheat_vm.cpp
View file

@ -20,8 +20,90 @@
#include "dmnt_cheat_manager.hpp"
bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
/* TODO: Parse opcodes */
return false;
/* If we've ever seen a decode failure, return true. */
bool valid = this->decode_success;
CheatVmOpcode opcode = {};
ON_SCOPE_EXIT {
this->decode_success &= valid;
if (valid) {
*out = opcode;
}
};
/* If we have ever seen a decode failure, don't decode any more. */
if (!valid) {
return valid;
}
/* Validate instruction pointer. */
if (this->instruction_ptr >= this->num_opcodes) {
valid = false;
return valid;
}
/* Read opcode. */
const u32 first_dword = this->program[this->instruction_ptr++];
opcode.opcode = (CheatVmOpcodeType)(((first_dword >> 28) & 0xF));
switch (opcode.opcode) {
case CheatVmOpcodeType_StoreStatic:
{
/* TODO */
}
break;
case CheatVmOpcodeType_BeginConditionalBlock:
{
/* TODO */
}
break;
case CheatVmOpcodeType_EndConditionalBlock:
{
/* There's actually nothing left to process here! */
}
break;
case CheatVmOpcodeType_ControlLoop:
{
/* TODO */
}
break;
case CheatVmOpcodeType_LoadRegisterStatic:
{
/* TODO */
}
break;
case CheatVmOpcodeType_LoadRegisterMemory:
{
/* TODO */
}
break;
case CheatVmOpcodeType_StoreToRegisterAddress:
{
/* TODO */
}
break;
case CheatVmOpcodeType_PerformArithmeticStatic:
{
/* TODO */
}
break;
case CheatVmOpcodeType_BeginKeypressConditionalBlock:
{
/* TODO */
}
break;
case CheatVmOpcodeType_PerformArithmeticRegister:
{
/* TODO */
}
break;
default:
/* Unrecognized instruction cannot be decoded. */
valid = false;
break;
}
/* End decoding. */
return valid;
}
void DmntCheatVm::SkipConditionalBlock() {
@ -64,6 +146,15 @@ u64 DmntCheatVm::GetCheatProcessAddress(const CheatProcessMetadata* metadata, Me
}
}
void DmntCheatVm::ResetState() {
for (size_t i = 0; i < DmntCheatVm::NumRegisters; i++) {
this->registers[i] = 0;
this->loop_tops[i] = 0;
}
this->instruction_ptr = 0;
this->decode_success = true;
}
void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
CheatVmOpcode cur_opcode;
u64 kDown = 0;
@ -71,10 +162,7 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
/* 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;
}
this->ResetState();
/* Loop until program finishes. */
while (this->DecodeNextOpcode(&cur_opcode)) {

2
stratosphere/dmnt/source/dmnt_cheat_vm.hpp
View file

@ -162,12 +162,14 @@ class DmntCheatVm {
private:
size_t num_opcodes = 0;
size_t instruction_ptr = 0;
bool decode_success = false;
u32 program[MaximumProgramOpcodeCount] = {0};
u64 registers[NumRegisters] = {0};
size_t loop_tops[NumRegisters] = {0};
private:
bool DecodeNextOpcode(CheatVmOpcode *out);
void SkipConditionalBlock();
void ResetState();
static u64 GetVmInt(VmInt value, u32 bit_width);
static u64 GetCheatProcessAddress(const CheatProcessMetadata* metadata, MemoryAccessType mem_type, u64 rel_address);

8
stratosphere/dmnt/source/dmnt_main.cpp
View file

@ -57,6 +57,8 @@ void __libnx_initheap(void) {
void __appInit(void) {
Result rc;
SetFirmwareVersionForLibnx();
rc = smInitialize();
if (R_FAILED(rc)) {
fatalSimple(MAKERESULT(Module_Libnx, LibnxError_InitFail_SM));
@ -133,7 +135,11 @@ int main(int argc, char **argv)
auto server_manager = new WaitableManager(5);
/* Create services. */
server_manager->AddWaitable(new ServiceServer<DebugMonitorService>("dmnt:-", 4));
/* TODO: Implement rest of dmnt:- in ams.tma development branch. */
/* server_manager->AddWaitable(new ServiceServer<DebugMonitorService>("dmnt:-", 4)); */
server_manager->AddWaitable(new ServiceServer<DmntCheatService>("dmnt:cht", 1));
/* Loop forever, servicing our services. */