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IOS HLE: Refactor ExecuteCommand 

ExecuteCommand was becoming pretty confusing with unused variables
for some commands, confusing names (device ID != IOS file descriptor),
duplicated checks, not keeping the indentation level low, and having
tons of things into a single function.

This commit gives more correct names to variables, deduplicates the
device checking code, and splits ExecuteCommand so that it's
easier to read.

It's worth noting that some device checks have been forgotten in the
past, which has caused a bug (which was recently fixed in 288e75f6).
This commit is contained in:
Léo Lam 2016-12-03 22:23:15 +01:00
parent 9f164d7c33
commit b65ad538ba
2 changed files with 90 additions and 179 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

267
Source/Core/Core/IPC_HLE/WII_IPC_HLE.cpp
View File

@ -283,14 +283,6 @@ std::shared_ptr<IWII_IPC_HLE_Device> AccessDeviceByID(u32 id)
return nullptr;
}
// This is called from ExecuteCommand() COMMAND_OPEN_DEVICE
std::shared_ptr<IWII_IPC_HLE_Device> CreateFileIO(u32 device_id, const std::string& device_name)
{
// scan device name and create the right one
INFO_LOG(WII_IPC_FILEIO, "IOP: Create FileIO %s", device_name.c_str());
return std::make_shared<CWII_IPC_HLE_Device_FileIO>(device_id, device_name);
}
void DoState(PointerWrap& p)
{
p.Do(s_request_queue);
@ -377,188 +369,109 @@ void DoState(PointerWrap& p)
}
}
void ExecuteCommand(u32 address)
static std::shared_ptr<IWII_IPC_HLE_Device> GetUnusedESDevice()
{
IPCCommandResult result = IWII_IPC_HLE_Device::GetNoReply();
IPCCommandType Command = static_cast<IPCCommandType>(Memory::Read_U32(address));
s32 DeviceID = Memory::Read_U32(address + 8);
std::shared_ptr<IWII_IPC_HLE_Device> device =
(DeviceID >= 0 && DeviceID < IPC_MAX_FDS) ? s_fdmap[DeviceID] : nullptr;
DEBUG_LOG(WII_IPC_HLE, "-->> Execute Command Address: 0x%08x (code: %x, device: %x) %p", address,
Command, DeviceID, device.get());
switch (Command)
for (u32 es_number = 0; es_number < ES_MAX_COUNT; ++es_number)
{
case IPC_CMD_OPEN:
{
u32 Mode = Memory::Read_U32(address + 0x10);
DeviceID = GetFreeDeviceID();
std::string device_name = Memory::GetString(Memory::Read_U32(address + 0xC));
INFO_LOG(WII_IPC_HLE, "Trying to open %s as %d", device_name.c_str(), DeviceID);
if (DeviceID >= 0)
{
if (device_name.find("/dev/es") == 0)
{
u32 j;
for (j = 0; j < ES_MAX_COUNT; j++)
{
if (!s_es_inuse[j])
{
s_es_inuse[j] = true;
s_fdmap[DeviceID] = s_es_handles[j];
result = s_es_handles[j]->Open(address, Mode);
Memory::Write_U32(DeviceID, address + 4);
break;
}
}
if (j == ES_MAX_COUNT)
{
Memory::Write_U32(FS_EESEXHAUSTED, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
}
else if (device_name.find("/dev/") == 0)
{
device = GetDeviceByName(device_name);
if (device)
{
s_fdmap[DeviceID] = device;
result = device->Open(address, Mode);
DEBUG_LOG(WII_IPC_FILEIO, "IOP: ReOpen (Device=%s, DeviceID=%08x, Mode=%i)",
device->GetDeviceName().c_str(), DeviceID, Mode);
Memory::Write_U32(DeviceID, address + 4);
}
else
{
WARN_LOG(WII_IPC_HLE, "Unimplemented device: %s", device_name.c_str());
Memory::Write_U32(FS_ENOENT, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
}
else if (device_name.find('/') == 0)
{
device = CreateFileIO(DeviceID, device_name);
result = device->Open(address, Mode);
DEBUG_LOG(WII_IPC_FILEIO, "IOP: Open File (Device=%s, ID=%08x, Mode=%i)",
device->GetDeviceName().c_str(), DeviceID, Mode);
if (Memory::Read_U32(address + 4) == (u32)DeviceID)
s_fdmap[DeviceID] = device;
}
else
{
WARN_LOG(WII_IPC_HLE, "Invalid device: %s", device_name.c_str());
Memory::Write_U32(FS_ENOENT, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
}
else
{
Memory::Write_U32(FS_EFDEXHAUSTED, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
if (s_es_inuse[es_number])
continue;
s_es_inuse[es_number] = true;
return s_es_handles[es_number];
}
return nullptr;
}
// Returns the FD for the newly opened device (on success) or an error code.
static s32 OpenDevice(const u32 address)
{
const std::string device_name = Memory::GetString(Memory::Read_U32(address + 0xC));
const u32 open_mode = Memory::Read_U32(address + 0x10);
const s32 new_fd = GetFreeDeviceID();
INFO_LOG(WII_IPC_HLE, "Opening %s (mode %d, fd %d)", device_name.c_str(), open_mode, new_fd);
if (new_fd < 0 || new_fd >= IPC_MAX_FDS)
{
ERROR_LOG(WII_IPC_HLE, "Couldn't get a free fd, too many open files");
return FS_EFDEXHAUSTED;
}
std::shared_ptr<IWII_IPC_HLE_Device> device;
if (device_name.find("/dev/es") == 0)
{
device = GetUnusedESDevice();
if (!device)
return FS_EESEXHAUSTED;
}
else if (device_name.find("/dev/") == 0)
{
device = GetDeviceByName(device_name);
}
else if (device_name.find('/') == 0)
{
device = std::make_shared<CWII_IPC_HLE_Device_FileIO>(new_fd, device_name);
}
if (!device)
{
ERROR_LOG(WII_IPC_HLE, "Unknown device: %s", device_name.c_str());
return FS_ENOENT;
}
Memory::Write_U32(new_fd, address + 4);
device->Open(address, open_mode);
const s32 open_return_code = Memory::Read_U32(address + 4);
if (open_return_code < 0)
return open_return_code;
s_fdmap[new_fd] = device;
return new_fd;
}
static IPCCommandResult HandleCommand(const u32 address)
{
const auto command = static_cast<IPCCommandType>(Memory::Read_U32(address));
if (command == IPC_CMD_OPEN)
{
const s32 new_fd = OpenDevice(address);
Memory::Write_U32(new_fd, address + 4);
return IWII_IPC_HLE_Device::GetDefaultReply();
}
const s32 fd = Memory::Read_U32(address + 8);
const auto device = (fd >= 0 && fd < IPC_MAX_FDS) ? s_fdmap[fd] : nullptr;
if (!device)
{
Memory::Write_U32(FS_EINVAL, address + 4);
return IWII_IPC_HLE_Device::GetDefaultReply();
}
switch (command)
{
case IPC_CMD_CLOSE:
{
if (device)
for (u32 j = 0; j < ES_MAX_COUNT; j++)
{
result = device->Close(address);
for (u32 j = 0; j < ES_MAX_COUNT; j++)
{
if (s_es_handles[j] == s_fdmap[DeviceID])
{
s_es_inuse[j] = false;
}
}
s_fdmap[DeviceID].reset();
if (s_es_handles[j] == s_fdmap[fd])
s_es_inuse[j] = false;
}
else
{
Memory::Write_U32(FS_EINVAL, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
}
s_fdmap[fd].reset();
return device->Close(address);
case IPC_CMD_READ:
{
if (device)
{
result = device->Read(address);
}
else
{
Memory::Write_U32(FS_EINVAL, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
}
return device->Read(address);
case IPC_CMD_WRITE:
{
if (device)
{
result = device->Write(address);
}
else
{
Memory::Write_U32(FS_EINVAL, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
}
return device->Write(address);
case IPC_CMD_SEEK:
{
if (device)
{
result = device->Seek(address);
}
else
{
Memory::Write_U32(FS_EINVAL, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
}
return device->Seek(address);
case IPC_CMD_IOCTL:
{
if (device)
{
result = device->IOCtl(address);
}
else
{
Memory::Write_U32(FS_EINVAL, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
}
return device->IOCtl(address);
case IPC_CMD_IOCTLV:
{
if (device)
{
result = device->IOCtlV(address);
}
else
{
Memory::Write_U32(FS_EINVAL, address + 4);
result = IWII_IPC_HLE_Device::GetDefaultReply();
}
break;
}
return device->IOCtlV(address);
default:
{
_dbg_assert_msg_(WII_IPC_HLE, 0, "Unknown IPC Command %i (0x%08x)", Command, address);
break;
}
_assert_msg_(WII_IPC_HLE, false, "Unexpected command: %x", command);
return IWII_IPC_HLE_Device::GetDefaultReply();
}
}
void ExecuteCommand(const u32 address)
{
IPCCommandResult result = HandleCommand(address);
// Ensure replies happen in order
const s64 ticks_until_last_reply = s_last_reply_time - CoreTiming::GetTicks();

2
Source/Core/Core/IPC_HLE/WII_IPC_HLE.h
View File

@ -62,8 +62,6 @@ void ES_DIVerify(const std::vector<u8>& tmd);
void SDIO_EventNotify();
std::shared_ptr<IWII_IPC_HLE_Device> CreateFileIO(u32 _DeviceID, const std::string& _rDeviceName);
std::shared_ptr<IWII_IPC_HLE_Device> GetDeviceByName(const std::string& _rDeviceName);
std::shared_ptr<IWII_IPC_HLE_Device> AccessDeviceByID(u32 _ID);