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ryujinx-final/Ryujinx.HLE/HOS/Services/Ro/IRoInterface.cs

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using LibHac.FsSystem;
using Ryujinx.Common;
using Ryujinx.Cpu;
using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.HLE.HOS.Kernel.Memory;
using Ryujinx.HLE.HOS.Kernel.Process;
using Ryujinx.HLE.Loaders.Executables;
using Ryujinx.HLE.Utilities;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
namespace Ryujinx.HLE.HOS.Services.Ro
{
[Service("ldr:ro")]
[Service("ro:1")] // 7.0.0+
class IRoInterface : IpcService, IDisposable
{
private const int MaxNrr = 0x40;
private const int MaxNro = 0x40;
private const int MaxMapRetries = 0x200;
private const int GuardPagesSize = 0x4000;
private const uint NrrMagic = 0x3052524E;
private const uint NroMagic = 0x304F524E;
private List<NrrInfo> _nrrInfos;
private List<NroInfo> _nroInfos;
private KProcess _owner;
private static Random _random = new Random();
public IRoInterface(ServiceCtx context)
{
_nrrInfos = new List<NrrInfo>(MaxNrr);
_nroInfos = new List<NroInfo>(MaxNro);
_owner = null;
}
private ResultCode ParseNrr(out NrrInfo nrrInfo, ServiceCtx context, long nrrAddress, long nrrSize)
{
nrrInfo = null;
if (nrrSize == 0 || nrrAddress + nrrSize <= nrrAddress || (nrrSize & 0xFFF) != 0)
{
return ResultCode.InvalidSize;
}
else if ((nrrAddress & 0xFFF) != 0)
{
return ResultCode.InvalidAddress;
}
StructReader reader = new StructReader(_owner.CpuMemory, nrrAddress);
NrrHeader header = reader.Read<NrrHeader>();
if (header.Magic != NrrMagic)
{
return ResultCode.InvalidNrr;
}
else if (header.NrrSize != nrrSize)
{
return ResultCode.InvalidSize;
}
List<byte[]> hashes = new List<byte[]>();
for (int i = 0; i < header.HashCount; i++)
{
byte[] temp = new byte[0x20];
_owner.CpuMemory.Read((ulong)(nrrAddress + header.HashOffset + (i * 0x20)), temp);
hashes.Add(temp);
}
nrrInfo = new NrrInfo(nrrAddress, header, hashes);
return ResultCode.Success;
}
public bool IsNroHashPresent(byte[] nroHash)
{
foreach (NrrInfo info in _nrrInfos)
{
foreach (byte[] hash in info.Hashes)
{
if (hash.SequenceEqual(nroHash))
{
return true;
}
}
}
return false;
}
public bool IsNroLoaded(byte[] nroHash)
{
foreach (NroInfo info in _nroInfos)
{
if (info.Hash.SequenceEqual(nroHash))
{
return true;
}
}
return false;
}
public ResultCode ParseNro(out NroInfo res, ServiceCtx context, ulong nroAddress, ulong nroSize, ulong bssAddress, ulong bssSize)
{
res = null;
if (_nroInfos.Count >= MaxNro)
{
return ResultCode.TooManyNro;
}
else if (nroSize == 0 || nroAddress + nroSize <= nroAddress || (nroSize & 0xFFF) != 0)
{
return ResultCode.InvalidSize;
}
else if (bssSize != 0 && bssAddress + bssSize <= bssAddress)
{
return ResultCode.InvalidSize;
}
else if ((nroAddress & 0xFFF) != 0)
{
return ResultCode.InvalidAddress;
}
uint magic = _owner.CpuMemory.Read<uint>(nroAddress + 0x10);
uint nroFileSize = _owner.CpuMemory.Read<uint>(nroAddress + 0x18);
if (magic != NroMagic || nroSize != nroFileSize)
{
return ResultCode.InvalidNro;
}
byte[] nroData = new byte[nroSize];
_owner.CpuMemory.Read(nroAddress, nroData);
byte[] nroHash = null;
MemoryStream stream = new MemoryStream(nroData);
using (SHA256 hasher = SHA256.Create())
{
nroHash = hasher.ComputeHash(stream);
}
if (!IsNroHashPresent(nroHash))
{
return ResultCode.NotRegistered;
}
if (IsNroLoaded(nroHash))
{
return ResultCode.AlreadyLoaded;
}
stream.Position = 0;
NroExecutable nro = new NroExecutable(stream.AsStorage(), nroAddress, bssAddress);
// Check if everything is page align.
if ((nro.Text.Length & 0xFFF) != 0 || (nro.Ro.Length & 0xFFF) != 0 ||
(nro.Data.Length & 0xFFF) != 0 || (nro.BssSize & 0xFFF) != 0)
{
return ResultCode.InvalidNro;
}
// Check if everything is contiguous.
if (nro.RoOffset != nro.TextOffset + nro.Text.Length ||
nro.DataOffset != nro.RoOffset + nro.Ro.Length ||
nroFileSize != nro.DataOffset + nro.Data.Length)
{
return ResultCode.InvalidNro;
}
// Check the bss size match.
if ((ulong)nro.BssSize != bssSize)
{
return ResultCode.InvalidNro;
}
uint totalSize = (uint)nro.Text.Length + (uint)nro.Ro.Length + (uint)nro.Data.Length + nro.BssSize;
// Apply patches
context.Device.FileSystem.ModLoader.ApplyNroPatches(nro);
res = new NroInfo(
nro,
nroHash,
nroAddress,
nroSize,
bssAddress,
bssSize,
(ulong)totalSize);
return ResultCode.Success;
}
private ResultCode MapNro(KProcess process, NroInfo info, out ulong nroMappedAddress)
{
KMemoryManager memMgr = process.MemoryManager;
int retryCount = 0;
nroMappedAddress = 0;
while (retryCount++ < MaxMapRetries)
{
ResultCode result = MapCodeMemoryInProcess(process, info.NroAddress, info.NroSize, out nroMappedAddress);
if (result != ResultCode.Success)
{
return result;
}
if (info.BssSize > 0)
{
KernelResult bssMappingResult = memMgr.MapProcessCodeMemory(nroMappedAddress + info.NroSize, info.BssAddress, info.BssSize);
if (bssMappingResult == KernelResult.InvalidMemState)
{
memMgr.UnmapProcessCodeMemory(nroMappedAddress + info.NroSize, info.BssAddress, info.BssSize);
memMgr.UnmapProcessCodeMemory(nroMappedAddress, info.NroAddress, info.NroSize);
continue;
}
else if (bssMappingResult != KernelResult.Success)
{
memMgr.UnmapProcessCodeMemory(nroMappedAddress + info.NroSize, info.BssAddress, info.BssSize);
memMgr.UnmapProcessCodeMemory(nroMappedAddress, info.NroAddress, info.NroSize);
return (ResultCode)bssMappingResult;
}
}
if (CanAddGuardRegionsInProcess(process, nroMappedAddress, info.TotalSize))
{
return ResultCode.Success;
}
}
return ResultCode.InsufficientAddressSpace;
}
private bool CanAddGuardRegionsInProcess(KProcess process, ulong baseAddress, ulong size)
{
KMemoryManager memMgr = process.MemoryManager;
KMemoryInfo memInfo = memMgr.QueryMemory(baseAddress - 1);
if (memInfo.State == MemoryState.Unmapped && baseAddress - GuardPagesSize >= memInfo.Address)
{
memInfo = memMgr.QueryMemory(baseAddress + size);
if (memInfo.State == MemoryState.Unmapped)
{
return baseAddress + size + GuardPagesSize <= memInfo.Address + memInfo.Size;
}
}
return false;
}
private ResultCode MapCodeMemoryInProcess(KProcess process, ulong baseAddress, ulong size, out ulong targetAddress)
{
KMemoryManager memMgr = process.MemoryManager;
targetAddress = 0;
int retryCount;
ulong addressSpacePageLimit = (memMgr.GetAddrSpaceSize() - size) >> 12;
for (retryCount = 0; retryCount < MaxMapRetries; retryCount++)
{
while (true)
{
ulong randomOffset = (ulong)(uint)_random.Next(0, (int)addressSpacePageLimit) << 12;
targetAddress = memMgr.GetAddrSpaceBaseAddr() + randomOffset;
if (memMgr.InsideAddrSpace(targetAddress, size) && !memMgr.InsideHeapRegion(targetAddress, size) && !memMgr.InsideAliasRegion(targetAddress, size))
{
break;
}
}
KernelResult result = memMgr.MapProcessCodeMemory(targetAddress, baseAddress, size);
if (result == KernelResult.InvalidMemState)
{
continue;
}
else if (result != KernelResult.Success)
{
return (ResultCode)result;
}
if (!CanAddGuardRegionsInProcess(process, targetAddress, size))
{
continue;
}
return ResultCode.Success;
}
if (retryCount == MaxMapRetries)
{
return ResultCode.InsufficientAddressSpace;
}
return ResultCode.Success;
}
private KernelResult SetNroMemoryPermissions(KProcess process, IExecutable relocatableObject, ulong baseAddress)
{
ulong textStart = baseAddress + (ulong)relocatableObject.TextOffset;
ulong roStart = baseAddress + (ulong)relocatableObject.RoOffset;
ulong dataStart = baseAddress + (ulong)relocatableObject.DataOffset;
ulong bssStart = dataStart + (ulong)relocatableObject.Data.Length;
ulong bssEnd = BitUtils.AlignUp(bssStart + (ulong)relocatableObject.BssSize, KMemoryManager.PageSize);
process.CpuMemory.Write(textStart, relocatableObject.Text);
process.CpuMemory.Write(roStart, relocatableObject.Ro);
process.CpuMemory.Write(dataStart, relocatableObject.Data);
MemoryHelper.FillWithZeros(process.CpuMemory, (long)bssStart, (int)(bssEnd - bssStart));
KernelResult result;
result = process.MemoryManager.SetProcessMemoryPermission(textStart, roStart - textStart, KMemoryPermission.ReadAndExecute);
if (result != KernelResult.Success)
{
return result;
}
result = process.MemoryManager.SetProcessMemoryPermission(roStart, dataStart - roStart, KMemoryPermission.Read);
if (result != KernelResult.Success)
{
return result;
}
return process.MemoryManager.SetProcessMemoryPermission(dataStart, bssEnd - dataStart, KMemoryPermission.ReadAndWrite);
}
private ResultCode RemoveNrrInfo(long nrrAddress)
{
foreach (NrrInfo info in _nrrInfos)
{
if (info.NrrAddress == nrrAddress)
{
_nrrInfos.Remove(info);
return ResultCode.Success;
}
}
return ResultCode.NotLoaded;
}
private ResultCode RemoveNroInfo(ulong nroMappedAddress)
{
foreach (NroInfo info in _nroInfos)
{
if (info.NroMappedAddress == nroMappedAddress)
{
_nroInfos.Remove(info);
return UnmapNroFromInfo(info);
}
}
return ResultCode.NotLoaded;
}
private ResultCode UnmapNroFromInfo(NroInfo info)
{
ulong textSize = (ulong)info.Executable.Text.Length;
ulong roSize = (ulong)info.Executable.Ro.Length;
ulong dataSize = (ulong)info.Executable.Data.Length;
ulong bssSize = (ulong)info.Executable.BssSize;
KernelResult result = KernelResult.Success;
if (info.Executable.BssSize != 0)
{
result = _owner.MemoryManager.UnmapProcessCodeMemory(
info.NroMappedAddress + textSize + roSize + dataSize,
info.Executable.BssAddress,
bssSize);
}
if (result == KernelResult.Success)
{
result = _owner.MemoryManager.UnmapProcessCodeMemory(
info.NroMappedAddress + textSize + roSize,
info.Executable.SourceAddress + textSize + roSize,
dataSize);
if (result == KernelResult.Success)
{
result = _owner.MemoryManager.UnmapProcessCodeMemory(
info.NroMappedAddress,
info.Executable.SourceAddress,
textSize + roSize);
}
}
return (ResultCode)result;
}
private ResultCode IsInitialized(long pid)
{
if (_owner != null && _owner.Pid == pid)
{
return ResultCode.Success;
}
return ResultCode.InvalidProcess;
}
[Command(0)]
// LoadNro(u64, u64, u64, u64, u64, pid) -> u64
public ResultCode LoadNro(ServiceCtx context)
{
ResultCode result = IsInitialized(_owner.Pid);
// Zero
context.RequestData.ReadUInt64();
ulong nroHeapAddress = context.RequestData.ReadUInt64();
ulong nroSize = context.RequestData.ReadUInt64();
ulong bssHeapAddress = context.RequestData.ReadUInt64();
ulong bssSize = context.RequestData.ReadUInt64();
ulong nroMappedAddress = 0;
if (result == ResultCode.Success)
{
NroInfo info;
result = ParseNro(out info, context, nroHeapAddress, nroSize, bssHeapAddress, bssSize);
if (result == ResultCode.Success)
{
result = MapNro(_owner, info, out nroMappedAddress);
if (result == ResultCode.Success)
{
result = (ResultCode)SetNroMemoryPermissions(_owner, info.Executable, nroMappedAddress);
if (result == ResultCode.Success)
{
info.NroMappedAddress = nroMappedAddress;
_nroInfos.Add(info);
}
}
}
}
context.ResponseData.Write(nroMappedAddress);
return result;
}
[Command(1)]
// UnloadNro(u64, u64, pid)
public ResultCode UnloadNro(ServiceCtx context)
{
ResultCode result = IsInitialized(_owner.Pid);
// Zero
context.RequestData.ReadUInt64();
ulong nroMappedAddress = context.RequestData.ReadUInt64();
if (result == ResultCode.Success)
{
if ((nroMappedAddress & 0xFFF) != 0)
{
return ResultCode.InvalidAddress;
}
result = RemoveNroInfo(nroMappedAddress);
}
return result;
}
[Command(2)]
// LoadNrr(u64, u64, u64, pid)
public ResultCode LoadNrr(ServiceCtx context)
{
ResultCode result = IsInitialized(_owner.Pid);
// pid placeholder, zero
context.RequestData.ReadUInt64();
long nrrAddress = context.RequestData.ReadInt64();
long nrrSize = context.RequestData.ReadInt64();
if (result == ResultCode.Success)
{
NrrInfo info;
result = ParseNrr(out info, context, nrrAddress, nrrSize);
if (result == ResultCode.Success)
{
if (_nrrInfos.Count >= MaxNrr)
{
result = ResultCode.NotLoaded;
}
else
{
_nrrInfos.Add(info);
}
}
}
return result;
}
[Command(3)]
// UnloadNrr(u64, u64, pid)
public ResultCode UnloadNrr(ServiceCtx context)
{
ResultCode result = IsInitialized(_owner.Pid);
// pid placeholder, zero
context.RequestData.ReadUInt64();
long nrrHeapAddress = context.RequestData.ReadInt64();
if (result == ResultCode.Success)
{
if ((nrrHeapAddress & 0xFFF) != 0)
{
return ResultCode.InvalidAddress;
}
result = RemoveNrrInfo(nrrHeapAddress);
}
return result;
}
[Command(4)]
// Initialize(u64, pid, KObject)
public ResultCode Initialize(ServiceCtx context)
{
if (_owner != null)
{
return ResultCode.InvalidSession;
}
_owner = context.Process.HandleTable.GetKProcess(context.Request.HandleDesc.ToCopy[0]);
context.Device.System.KernelContext.Syscall.CloseHandle(context.Request.HandleDesc.ToCopy[0]);
return ResultCode.Success;
}
public void Dispose()
{
foreach (NroInfo info in _nroInfos)
{
UnmapNroFromInfo(info);
}
_nroInfos.Clear();
}
}
}