mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2026-09-29 07:36:32 +02:00
omegadox
d75bf5ab97
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@904 8ced0084-cf51-0410-be5f-012b33b47a6e
495 lines
13 KiB
C++
495 lines
13 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, version 2.0.
|
|
|
|
// This program is distributed in the hope that 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 2.0 for more details.
|
|
|
|
// A copy of the GPL 2.0 should have been included with the program.
|
|
// If not, see http://www.gnu.org/licenses/
|
|
|
|
// Official SVN repository and contact information can be found at
|
|
// http://code.google.com/p/dolphin-emu/
|
|
|
|
|
|
// Simple partial Action Replay code system implementation.
|
|
|
|
// Will never be able to support some AR codes - specifically those that patch the running
|
|
// Action Replay engine itself - yes they do exist!!!
|
|
|
|
// Action Replay actually is a small virtual machine with a limited number of commands.
|
|
// It probably is Turing complete - but what does that matter when AR codes can write
|
|
// actual PowerPC code.
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "StringUtil.h"
|
|
#include "IniFile.h"
|
|
#include "HW/Memmap.h"
|
|
#include "ActionReplay.h"
|
|
|
|
namespace {
|
|
|
|
// These should be turned into locals in RunActionReplayCode, and passed as parameters to the others.
|
|
static u32 cmd_addr;
|
|
static u8 cmd;
|
|
static u32 addr;
|
|
static u32 data;
|
|
static u8 subtype;
|
|
static u8 w;
|
|
static u8 type;
|
|
static u8 zcode;
|
|
static bool doFillNSlide = false;
|
|
static bool doMemoryCopy = false;
|
|
static u32 addr_last;
|
|
static u32 val_last;
|
|
static std::vector<AREntry>::const_iterator iter;
|
|
|
|
static std::vector<ARCode> arCodes;
|
|
static ARCode code;
|
|
|
|
} // namespace
|
|
|
|
void DoARSubtype_RamWriteAndFill();
|
|
void DoARSubtype_WriteToPointer();
|
|
void DoARSubtype_AddCode();
|
|
void DoARSubtype_MasterCodeAndWriteToCCXXXXXX();
|
|
void DoARSubtype_Other();
|
|
void DoARZeroCode_FillAndSlide();
|
|
void DoARZeroCode_MemoryCopy();
|
|
|
|
// Parses the Action Replay section of a game ini file.
|
|
void LoadActionReplayCodes(IniFile &ini)
|
|
{
|
|
std::vector<std::string> lines;
|
|
ARCode currentCode;
|
|
arCodes.clear();
|
|
|
|
if (!ini.GetLines("ActionReplay", lines))
|
|
return; // no codes found.
|
|
|
|
for (std::vector<std::string>::const_iterator it = lines.begin(); it != lines.end(); ++it)
|
|
{
|
|
std::string line = *it;
|
|
std::vector<std::string> pieces;
|
|
SplitString(line, " ", pieces);
|
|
if (pieces.size() == 2 && pieces[0].size() == 8 && pieces[1].size() == 8)
|
|
{
|
|
// Smells like a decrypted Action Replay code, great! Decode!
|
|
AREntry op;
|
|
bool success = TryParseUInt(std::string("0x") + pieces[0], &op.cmd_addr);
|
|
success |= TryParseUInt(std::string("0x") + pieces[1], &op.value);
|
|
if (!success)
|
|
PanicAlert("Invalid AR code line: %s", line.c_str());
|
|
else
|
|
currentCode.ops.push_back(op);
|
|
}
|
|
else
|
|
{
|
|
SplitString(line, "-", pieces);
|
|
if (pieces.size() == 3 && pieces[0].size() == 4 && pieces[1].size() == 4 && pieces[2].size() == 4)
|
|
{
|
|
// Encrypted AR code
|
|
PanicAlert("Dolphin does not yet support encrypted AR codes.");
|
|
}
|
|
else if (line.size() > 1)
|
|
{
|
|
// OK, name line. This is the start of a new code. Push the old one, prepare the new one.
|
|
if (currentCode.ops.size())
|
|
arCodes.push_back(currentCode);
|
|
currentCode.name = "(invalid)";
|
|
currentCode.ops.clear();
|
|
|
|
if (line[0] == '+')
|
|
{
|
|
// Active code - name line.
|
|
line = StripSpaces(line.substr(1));
|
|
currentCode.name = line;
|
|
currentCode.active = true;
|
|
}
|
|
else
|
|
{
|
|
// Inactive code.
|
|
currentCode.name = line;
|
|
currentCode.active = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Handle the last code correctly.
|
|
if (currentCode.ops.size())
|
|
arCodes.push_back(currentCode);
|
|
}
|
|
|
|
void ActionReplayRunAllActive()
|
|
{
|
|
for (std::vector<ARCode>::const_iterator iter = arCodes.begin(); iter != arCodes.end(); ++iter)
|
|
if (iter->active)
|
|
RunActionReplayCode(*iter, false);
|
|
}
|
|
|
|
|
|
// The mechanism is slightly different than what the real AR uses, so there may be compatibility problems.
|
|
// For example, some authors have created codes that add features to AR. Hacks for popular ones can be added here,
|
|
// but the problem is not generally solvable.
|
|
void RunActionReplayCode(const ARCode &arcode, bool nowIsBootup) {
|
|
code = arcode;
|
|
for (iter = code.ops.begin(); iter != code.ops.end(); ++iter)
|
|
{
|
|
cmd_addr = iter->cmd_addr;
|
|
cmd = iter->cmd_addr >> 24;
|
|
addr = iter->cmd_addr;
|
|
data = iter->value;
|
|
subtype = ((cmd_addr >> 30) & 0x03);
|
|
w = (cmd & 0x07);
|
|
type = ((cmd_addr >> 27) & 0x07);
|
|
zcode = ((data >> 29) & 0x07);
|
|
|
|
// Do Fill & Slide
|
|
if (doFillNSlide) {
|
|
DoARZeroCode_FillAndSlide();
|
|
continue;
|
|
}
|
|
|
|
// Memory Copy
|
|
if (doMemoryCopy) {
|
|
DoARZeroCode_MemoryCopy();
|
|
continue;
|
|
}
|
|
|
|
// ActionReplay program self modification codes
|
|
if (addr >= 0x00002000 && addr < 0x00003000) {
|
|
PanicAlert("This action replay simulator does not support codes that modify Action Replay itself.");
|
|
return;
|
|
}
|
|
|
|
// skip these weird init lines
|
|
if (iter == code.ops.begin() && cmd == 1) continue;
|
|
|
|
// Zero codes
|
|
if (addr == 0x0) // Check if the code is a zero code
|
|
{
|
|
switch(zcode)
|
|
{
|
|
case 0x00: // END OF CODES
|
|
return;
|
|
case 0x02: // Normal execution of codes
|
|
// Todo: Set register 1BB4 to 0
|
|
break;
|
|
case 0x03: // Executes all codes in the same row
|
|
// Todo: Set register 1BB4 to 1
|
|
PanicAlert("Zero code 3 is not supported");
|
|
continue;
|
|
case 0x04: // Fill & Slide or Memory Copy
|
|
if (((addr >> 25) & 0x03) == 0x3) {
|
|
doMemoryCopy = true;
|
|
addr_last = addr;
|
|
val_last = data;
|
|
}
|
|
else {
|
|
doFillNSlide = true;
|
|
addr_last = addr;
|
|
}
|
|
continue;
|
|
default:
|
|
PanicAlert("Zero code unknown to dolphin: %08x",zcode);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Normal codes
|
|
switch (subtype)
|
|
{
|
|
case 0x0: // Ram write (and fill)
|
|
DoARSubtype_RamWriteAndFill();
|
|
continue;
|
|
case 0x1: // Write to pointer
|
|
DoARSubtype_WriteToPointer();
|
|
continue;
|
|
case 0x2: // Add code
|
|
DoARSubtype_AddCode();
|
|
continue;
|
|
case 0x3: // Master Code & Write to CCXXXXXX
|
|
DoARSubtype_MasterCodeAndWriteToCCXXXXXX();
|
|
continue; // TODO: This is not implemented yet
|
|
default: // non-specific z codes (hacks)
|
|
DoARSubtype_Other();
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DoARSubtype_RamWriteAndFill()
|
|
{
|
|
if (w < 0x8) // Check the value W in 0xZWXXXXXXX
|
|
{
|
|
u32 new_addr = ( (addr & 0x01FFFFFF) | 0x80000000);
|
|
switch ((addr >> 25) & 0x03)
|
|
{
|
|
case 0x00: // Byte write
|
|
{
|
|
u8 repeat = data >> 8;
|
|
for (int i = 0; i <= repeat; i++) {
|
|
Memory::Write_U8(data & 0xFF, new_addr + i);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 0x01: // Short write
|
|
{
|
|
u16 repeat = data >> 16;
|
|
for (int i = 0; i <= repeat; i++) {
|
|
Memory::Write_U16(data & 0xFFFF, new_addr + i * 2);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 0x02: // Dword write
|
|
Memory::Write_U32(data, new_addr);
|
|
break;
|
|
default:
|
|
break; // TODO(Omega): maybe add a PanicAlert here?
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void DoARSubtype_WriteToPointer()
|
|
{
|
|
if (w < 0x8)
|
|
{
|
|
u32 new_addr = ( addr | 0x80000000);
|
|
switch ((addr >> 25) & 0x03)
|
|
{
|
|
case 0x00: // Byte write to pointer [40]
|
|
{
|
|
u32 ptr = Memory::Read_U32(new_addr);
|
|
u8 thebyte = data & 0xFF;
|
|
u32 offset = data >> 8;
|
|
Memory::Write_U8(thebyte, ptr + offset);
|
|
break;
|
|
}
|
|
|
|
case 0x01: // Short write to pointer [42]
|
|
{
|
|
u32 ptr = Memory::Read_U32(new_addr);
|
|
u16 theshort = data & 0xFFFF;
|
|
u32 offset = (data >> 16) << 1;
|
|
Memory::Write_U16(theshort, ptr + offset);
|
|
break;
|
|
}
|
|
|
|
case 0x02: // Dword write to pointer [44]
|
|
Memory::Write_U32(data, Memory::Read_U32(new_addr));
|
|
break;
|
|
|
|
default:
|
|
PanicAlert("AR Method Error (Write To Pointer): w = %08x, addr = %08x", w, addr);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DoARSubtype_AddCode()
|
|
{
|
|
if (w < 0x8)
|
|
{
|
|
u32 new_addr = ( addr & 0x81FFFFFF);
|
|
switch ((addr >> 25) & 0x03)
|
|
{
|
|
case 0x0: // Byte add
|
|
Memory::Write_U8(Memory::Read_U8(new_addr) + (data & 0xFF), new_addr);
|
|
break;
|
|
case 0x1: // Short add
|
|
Memory::Write_U16(Memory::Read_U16(new_addr) + (data & 0xFFFF), new_addr);
|
|
break;
|
|
case 0x2: // DWord add
|
|
Memory::Write_U32(Memory::Read_U32(new_addr) + data, new_addr);
|
|
break;
|
|
case 0x3: // Float add (not working?)
|
|
{
|
|
union { u32 u; float f;} fu, d;
|
|
fu.u = Memory::Read_U32(new_addr);
|
|
d.u = data;
|
|
fu.f += data;
|
|
Memory::Write_U32(fu.u, new_addr);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DoARSubtype_MasterCodeAndWriteToCCXXXXXX()
|
|
{
|
|
// code not yet implemented - TODO
|
|
|
|
//if (w < 0x8)
|
|
//{
|
|
// u32 new_addr = (addr | 0x80000000);
|
|
// switch ((new_addr >> 25) & 0x03)
|
|
// {
|
|
// case 0x2:
|
|
// {
|
|
|
|
// }
|
|
// }
|
|
//}
|
|
}
|
|
|
|
void DoARSubtype_Other()
|
|
{
|
|
switch (cmd & 0xFE)
|
|
{
|
|
case 0x90:
|
|
// Eh, this must be wrong. Should it really fallthrough?
|
|
if (Memory::Read_U32(addr) == data) return; // IF 32 bit equal, exit
|
|
case 0x08: // IF 8 bit equal, execute next opcode
|
|
case 0x48: // (double)
|
|
if (Memory::Read_U16(addr) != (data & 0xFFFF)) {
|
|
if (++iter == code.ops.end()) return;
|
|
if (cmd == 0x48) if (++iter == code.ops.end()) return;
|
|
}
|
|
break;
|
|
case 0x0A: // IF 16 bit equal, execute next opcode
|
|
case 0x4A: // (double)
|
|
if (Memory::Read_U16(addr) != (data & 0xFFFF)) {
|
|
if (++iter == code.ops.end()) return;
|
|
if (cmd == 0x4A) if (++iter == code.ops.end()) return;
|
|
}
|
|
break;
|
|
case 0x0C: // IF 32 bit equal, execute next opcode
|
|
case 0x4C: // (double)
|
|
if (Memory::Read_U32(addr) != data) {
|
|
if (++iter == code.ops.end()) return;
|
|
if (cmd == 0x4C) if (++iter == code.ops.end()) return;
|
|
}
|
|
break;
|
|
case 0x10: // IF NOT 8 bit equal, execute next opcode
|
|
case 0x50: // (double)
|
|
if (Memory::Read_U8(addr) == (data & 0xFF)) {
|
|
if (++iter == code.ops.end()) return;
|
|
if (cmd == 0x50) if (++iter == code.ops.end()) return;
|
|
}
|
|
break;
|
|
case 0x12: // IF NOT 16 bit equal, execute next opcode
|
|
case 0x52: // (double)
|
|
if (Memory::Read_U16(addr) == (data & 0xFFFF)) {
|
|
if (++iter == code.ops.end()) return;
|
|
if (cmd == 0x52) if (++iter == code.ops.end()) return;
|
|
}
|
|
break;
|
|
case 0x14: // IF NOT 32 bit equal, execute next opcode
|
|
case 0x54: // (double)
|
|
if (Memory::Read_U32(addr) == data) {
|
|
if (++iter == code.ops.end()) return;
|
|
if (cmd == 0x54) if (++iter == code.ops.end()) return;
|
|
}
|
|
break;
|
|
case 0xC4: // "Master Code" - configure the AR
|
|
{
|
|
u8 number = data & 0xFF;
|
|
if (number == 0)
|
|
{
|
|
// Normal master code - execute once.
|
|
} else {
|
|
// PanicAlert("Not supporting multiple master codes.");
|
|
}
|
|
// u8 numOpsPerFrame = (data >> 8) & 0xFF;
|
|
// Blah, we generally ignore master codes.
|
|
break;
|
|
}
|
|
default:
|
|
PanicAlert("Unknown Action Replay command %02x (%08x %08x)", cmd, iter->cmd_addr, iter->value);
|
|
break;
|
|
}
|
|
}
|
|
void DoARZeroCode_FillAndSlide()
|
|
{
|
|
u32 new_addr = (addr_last & 0x81FFFFFF);
|
|
u8 size = ((new_addr >> 25) & 0x03);
|
|
u32 addr_incr;
|
|
u32 val = addr;
|
|
int val_incr;
|
|
u8 write_num = ((data & 0x78000) >> 16); // Z2
|
|
u32 curr_addr = new_addr;
|
|
|
|
if (write_num < 1) {
|
|
doFillNSlide = false;
|
|
return;
|
|
}
|
|
|
|
if ((data >> 24) >> 3) { // z1 >> 3
|
|
addr_incr = ((data & 0x7FFF) + 0xFFFF0000); // FFFFZ3Z4
|
|
val_incr = (int)((data & 0x7F) + 0xFFFFFF00); // FFFFFFZ1
|
|
}
|
|
else {
|
|
addr_incr = (data & 0x7FFF); // 0000Z3Z4
|
|
val_incr = (int)(data & 0x7F); // 000000Z1
|
|
}
|
|
|
|
if (val_incr < 0)
|
|
{
|
|
curr_addr = new_addr + (addr_incr * write_num);
|
|
}
|
|
|
|
switch(size)
|
|
{
|
|
case 0x0: // Byte
|
|
for(int i=0; i < write_num; i++) {
|
|
u8 repeat = val >> 8;
|
|
for(int j=0; j < repeat; j++) {
|
|
Memory::Write_U8(val & 0xFF, new_addr + j);
|
|
}
|
|
val += val_incr;
|
|
if (val_incr < 0) curr_addr -= addr_incr;
|
|
else curr_addr += addr_incr;
|
|
} break;
|
|
case 0x1: // Halfword
|
|
for(int i=0; i < write_num; i++) {
|
|
u8 repeat = val >> 16;
|
|
for(int j=0; j < repeat; j++) {
|
|
Memory::Write_U8(val & 0xFFFF, new_addr + j * 2);
|
|
}
|
|
val += val_incr;
|
|
if (val_incr < 0) curr_addr -= addr_incr;
|
|
else curr_addr += addr_incr;
|
|
} break;
|
|
case 0x2: // Word
|
|
for(int i=0; i < write_num; i++) {
|
|
Memory::Write_U16(val, new_addr);
|
|
val += val_incr;
|
|
if (val_incr < 0) curr_addr -= addr_incr;
|
|
else curr_addr += addr_incr;
|
|
} break;
|
|
default: break;
|
|
}
|
|
doFillNSlide = false;
|
|
return;
|
|
}
|
|
void DoARZeroCode_MemoryCopy()
|
|
{
|
|
u32 addr_dest = (val_last | 0x06000000);
|
|
u32 addr_src = addr;
|
|
u8 num_bytes = (data & 0x7FFF);
|
|
|
|
if ((data & ~0x7FFF) == 0x0000) {
|
|
if((data >> 24) != 0x0) { // Memory Copy With Pointers Support
|
|
for(int i = 0; i < 138; i++) {
|
|
Memory::Write_U8(Memory::Read_U8(addr_src + i), addr_dest + i);
|
|
}
|
|
}
|
|
else { // Memory Copy Without Pointer Support
|
|
for(int i=0; i < num_bytes; i++) {
|
|
Memory::Write_U32(Memory::Read_U32(addr_src + i), addr_dest + i);
|
|
} return;
|
|
}
|
|
}
|
|
} |