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dmnt-cheat: add clear-reg to save/restore reg

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This commit is contained in:
Michael Scire 2019-04-05 14:19:12 -07:00
parent c7ffcad74e
commit 5bedcd305d
2 changed files with 21 additions and 13 deletions
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31
stratosphere/dmnt/source/dmnt_cheat_vm.cpp
View File

@ -481,7 +481,7 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
/* C1 = opcode 0xC1 */
/* D = destination index. */
/* S = source index. */
/* x = 2 if clearing saved value, 1 if saving a register, 0 if restoring a register. */
/* x = 3 if clearing reg, 2 if clearing saved value, 1 if saving a register, 0 if restoring a register. */
/* NOTE: If we add more save slots later, current encoding is backwards compatible. */
opcode.save_restore_reg.dst_index = (first_dword >> 16) & 0xF;
opcode.save_restore_reg.src_index = (first_dword >> 8) & 0xF;
@ -492,7 +492,7 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
{
/* C2x0XXXX */
/* C2 = opcode 0xC2 */
/* x = 2 if clearing saved value, 1 if saving, 0 if restoring. */
/* x = 3 if clearing reg, 2 if clearing saved value, 1 if saving, 0 if restoring. */
/* X = 16-bit bitmask, bit i --> save or restore register i. */
opcode.save_restore_regmask.op_type = (SaveRestoreRegisterOpType)((first_dword >> 20) & 0xF);
for (size_t i = 0; i < NumRegisters; i++) {
@ -1010,7 +1010,10 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
case CheatVmOpcodeType_SaveRestoreRegister:
/* Save or restore a register. */
switch (cur_opcode.save_restore_reg.op_type) {
case SaveRestoreRegisterOpType_Clear:
case SaveRestoreRegisterOpType_ClearRegs:
this->registers[cur_opcode.save_restore_reg.dst_index] = 0ul;
break;
case SaveRestoreRegisterOpType_ClearSaved:
this->saved_values[cur_opcode.save_restore_reg.dst_index] = 0ul;
break;
case SaveRestoreRegisterOpType_Save:
@ -1024,21 +1027,15 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
break;
case CheatVmOpcodeType_SaveRestoreRegisterMask:
/* Save or restore register mask. */
if (cur_opcode.save_restore_reg.op_type == SaveRestoreRegisterOpType_Clear) {
for (size_t i = 0; i < NumRegisters; i++) {
if (cur_opcode.save_restore_regmask.should_operate[i]) {
this->saved_values[i] = 0;
}
}
break;
}
u64 *src;
u64 *dst;
switch (cur_opcode.save_restore_regmask.op_type) {
case SaveRestoreRegisterOpType_ClearSaved:
case SaveRestoreRegisterOpType_Save:
src = this->registers;
dst = this->saved_values;
break;
case SaveRestoreRegisterOpType_ClearRegs:
case SaveRestoreRegisterOpType_Restore:
default:
src = this->registers;
@ -1047,7 +1044,17 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
}
for (size_t i = 0; i < NumRegisters; i++) {
if (cur_opcode.save_restore_regmask.should_operate[i]) {
dst[i] = src[i];
switch (cur_opcode.save_restore_regmask.op_type) {
case SaveRestoreRegisterOpType_ClearSaved:
case SaveRestoreRegisterOpType_ClearRegs:
dst[i] = 0ul;
break;
case SaveRestoreRegisterOpType_Save:
case SaveRestoreRegisterOpType_Restore:
default:
dst[i] = src[i];
break;
}
}
}
break;

3
stratosphere/dmnt/source/dmnt_cheat_vm.hpp
View File

@ -98,7 +98,8 @@ enum CompareRegisterValueType : u32 {
enum SaveRestoreRegisterOpType : u32 {
SaveRestoreRegisterOpType_Restore = 0,
SaveRestoreRegisterOpType_Save = 1,
SaveRestoreRegisterOpType_Clear = 2,
SaveRestoreRegisterOpType_ClearSaved = 2,
SaveRestoreRegisterOpType_ClearRegs = 3,
};
union VmInt {