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dmnt-cheat: Add Save/Restore register mask opcode

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This commit is contained in:
Michael Scire 2019-04-04 12:23:51 -07:00
parent 477bee2e4c
commit 08a2f02a7c
2 changed files with 43 additions and 0 deletions
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36
stratosphere/dmnt/source/dmnt_cheat_vm.cpp
View File

@ -194,6 +194,13 @@ void DmntCheatVm::LogOpcode(const CheatVmOpcode *opcode) {
this->LogToDebugFile("Src Idx: %x\n", opcode->save_restore_reg.src_index);
this->LogToDebugFile("Is Save: %d\n", opcode->save_restore_reg.is_save);
break;
case CheatVmOpcodeType_SaveRestoreRegisterMask:
this->LogToDebugFile("Opcode: Save or Restore Register Mask\n");
this->LogToDebugFile("Is Save: %d\n", opcode->save_restore_regmask.is_save);
for (size_t i = 0; i < NumRegisters; i++) {
this->LogToDebugFile("Act[%02x]: %d\n", i, opcode->save_restore_regmask.should_save_or_restore[i]);
}
break;
default:
this->LogToDebugFile("Unknown opcode: %x\n", opcode->opcode);
break;
@ -481,6 +488,18 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
opcode.save_restore_reg.is_save = ((first_dword >> 4) & 0xF) != 0;
}
break;
case CheatVmOpcodeType_SaveRestoreRegisterMask:
{
/* C2x0XXXX */
/* C2 = opcode 0xC2 */
/* x = 1 if saving, 0 if restoring. */
/* X = 16-bit bitmask, bit i --> save or restore register i. */
opcode.save_restore_regmask.is_save = ((first_dword >> 20) & 0xF) != 0;
for (size_t i = 0; i < NumRegisters; i++) {
opcode.save_restore_regmask.should_save_or_restore[i] = (first_dword & (1u << i)) != 0;
}
}
break;
case CheatVmOpcodeType_ExtendedWidth:
default:
/* Unrecognized instruction cannot be decoded. */
@ -996,6 +1015,23 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
this->registers[cur_opcode.save_restore_reg.dst_index] = this->saved_values[cur_opcode.save_restore_reg.src_index];
}
break;
case CheatVmOpcodeType_SaveRestoreRegisterMask:
/* Save or restore register mask. */
u64 *src;
u64 *dst;
if (cur_opcode.save_restore_regmask.is_save) {
src = this->registers;
dst = this->saved_values;
} else {
src = this->registers;
dst = this->saved_values;
}
for (size_t i = 0; i < NumRegisters; i++) {
if (cur_opcode.save_restore_regmask.should_save_or_restore[i]) {
dst[i] = src[i];
}
}
break;
default:
/* By default, we do a no-op. */
break;

7
stratosphere/dmnt/source/dmnt_cheat_vm.hpp
View File

@ -44,6 +44,7 @@ enum CheatVmOpcodeType : u32 {
/* Extended width opcodes. */
CheatVmOpcodeType_BeginRegisterConditionalBlock = 0xC0,
CheatVmOpcodeType_SaveRestoreRegister = 0xC1,
CheatVmOpcodeType_SaveRestoreRegisterMask = 0xC2,
};
enum MemoryAccessType : u32 {
@ -198,6 +199,11 @@ struct SaveRestoreRegisterOpcode {
bool is_save;
};
struct SaveRestoreRegisterMaskOpcode {
bool is_save;
bool should_save_or_restore[0x10];
};
struct CheatVmOpcode {
CheatVmOpcodeType opcode;
bool begin_conditional_block;
@ -215,6 +221,7 @@ struct CheatVmOpcode {
StoreRegisterToAddressOpcode str_register;
BeginRegisterConditionalOpcode begin_reg_cond;
SaveRestoreRegisterOpcode save_restore_reg;
SaveRestoreRegisterMaskOpcode save_restore_regmask;
};
};