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Added code to patch the codehandler's MMIO address to the currently running system. Added code to detect the location of where the code list should be. This allows any Gecko code handler to be used. Replace the codehandler.bin file with the code handler to be used (e.g. codehandleronly.bin).

This commit is contained in:
skidau 2014-09-04 00:48:52 +10:00
parent b583879c2a
commit 08715167a8
1 changed files with 33 additions and 14 deletions
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47
Source/Core/Core/GeckoCode.cpp
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@ -14,6 +14,10 @@
namespace Gecko
{
const u32 installer_base_address = 0x80001800;
const u32 installer_end_address = 0x80003000;
// return true if a code exists
bool GeckoCode::Exist(u32 address, u32 data)
{
@ -70,7 +74,6 @@ void SetActiveCodes(const std::vector<GeckoCode>& gcodes)
static bool InstallCodeHandler()
{
u32 codelist_location = 0x800028B8; // Debugger on location (0x800022A8 = Debugger off, using codehandleronly.bin)
std::string data;
std::string _rCodeHandlerFilename = File::GetSysDirectory() + GECKO_CODE_HANDLER;
if (!File::ReadFileToString(_rCodeHandlerFilename, data))
@ -79,15 +82,31 @@ static bool InstallCodeHandler()
return false;
}
// Install code handler
Memory::WriteBigEData((const u8*)data.data(), 0x80001800, data.length());
u8 mmioAddr = 0xCC;
// Turn off Pause on start
Memory::Write_U32(0, 0x80002774);
if (SConfig::GetInstance().m_LocalCoreStartupParameter.bWii)
{
mmioAddr = 0xCD;
}
// Install code handler
Memory::WriteBigEData((const u8*)data.data(), installer_base_address, data.length());
// Patch the code handler to the system starting up
for (unsigned int h = 0; h < data.length(); h += 4)
{
// Patch MMIO address
if (Memory::ReadUnchecked_U32(installer_base_address + h) == (0x3f000000 | ((mmioAddr ^ 1) << 8)))
{
NOTICE_LOG(ACTIONREPLAY, "Patching MMIO access at %08x", installer_base_address + h);
Memory::Write_U32(0x3f000000 | mmioAddr << 8, installer_base_address + h);
}
}
u32 codelist_location = installer_base_address + (u32)data.length() - 8;
// Write a magic value to 'gameid' (codehandleronly does not actually read this).
// For the purpose of this, see HLEGeckoCodehandler.
Memory::Write_U32(0xd01f1bad, 0x80001800);
Memory::Write_U32(0xd01f1bad, installer_base_address);
// Create GCT in memory
Memory::Write_U32(0x00d0c0de, codelist_location);
@ -104,7 +123,7 @@ static bool InstallCodeHandler()
for (const GeckoCode::Code& code : active_code.codes)
{
// Make sure we have enough memory to hold the code list
if ((codelist_location + 24 + i) < 0x80003000)
if ((codelist_location + 24 + i) < installer_end_address)
{
Memory::Write_U32(code.address, codelist_location + 8 + i);
Memory::Write_U32(code.data, codelist_location + 12 + i);
@ -118,12 +137,12 @@ static bool InstallCodeHandler()
Memory::Write_U32(0x00000000, codelist_location + 12 + i);
// Turn on codes
Memory::Write_U8(1, 0x80001807);
Memory::Write_U8(1, installer_base_address + 7);
// Invalidate the icache
for (unsigned int j = 0; j < data.length(); j += 32)
// Invalidate the icache and any asm codes
for (unsigned int j = 0; j < installer_end_address; j += 32)
{
PowerPC::ppcState.iCache.Invalidate(0x80001800 + j);
PowerPC::ppcState.iCache.Invalidate(installer_base_address + j);
}
return true;
}
@ -132,7 +151,7 @@ void RunCodeHandler()
{
if (SConfig::GetInstance().m_LocalCoreStartupParameter.bEnableCheats && active_codes.size() > 0)
{
if (!code_handler_installed || Memory::Read_U32(0x80001800) - 0xd01f1bad > 5)
if (!code_handler_installed || Memory::Read_U32(installer_base_address) - 0xd01f1bad > 5)
code_handler_installed = InstallCodeHandler();
if (!code_handler_installed)
@ -146,7 +165,7 @@ void RunCodeHandler()
u32 oldLR = LR;
PowerPC::CoreMode oldMode = PowerPC::GetMode();
PC = 0x800018A8;
PC = installer_base_address + 0xA8;
LR = 0;
// Execute the code handler in interpreter mode to track when it exits