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kernel: Implement SetMemoryPermission syscall (#2772)

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* kernel: Implement SetMemoryPermission syscall

This commit implement the SetMemoryPermission syscall accurately.
This also fix KMemoryPermission not being an unsigned 32 bits type and
add the "DontCare" bit (used by shared memory, currently unused in
Ryujinx)

* Update MemoryPermission mask

* Address gdkchan's comments

* Fix a nit

* Address gdkchan's comment
This commit is contained in:
Mary 2021-10-24 01:24:49 +02:00 committed by GitHub
parent e7e65ccbc9
commit c94d47cc40
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 102 additions and 5 deletions
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46
Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
View file

@ -799,6 +799,52 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
return KernelResult.Success;
}
public KernelResult SetMemoryPermission(ulong address, ulong size, KMemoryPermission permission)
{
lock (_blockManager)
{
if (CheckRange(
address,
size,
MemoryState.PermissionChangeAllowed,
MemoryState.PermissionChangeAllowed,
KMemoryPermission.None,
KMemoryPermission.None,
MemoryAttribute.Mask,
MemoryAttribute.None,
MemoryAttribute.IpcAndDeviceMapped,
out MemoryState oldState,
out KMemoryPermission oldPermission,
out _))
{
if (permission != oldPermission)
{
if (!_slabManager.CanAllocate(MaxBlocksNeededForInsertion))
{
return KernelResult.OutOfResource;
}
ulong pagesCount = size / PageSize;
KernelResult result = Reprotect(address, pagesCount, permission);
if (result != KernelResult.Success)
{
return result;
}
_blockManager.InsertBlock(address, pagesCount, oldState, permission);
}
return KernelResult.Success;
}
else
{
return KernelResult.InvalidMemState;
}
}
}
public ulong GetTotalHeapSize()
{
lock (_blockManager)

5
Ryujinx.HLE/HOS/Kernel/Memory/MemoryPermission.cs
View file

@ -3,14 +3,15 @@ using System;
namespace Ryujinx.HLE.HOS.Kernel.Memory
{
[Flags]
enum KMemoryPermission : byte
enum KMemoryPermission : uint
{
None = 0,
Mask = 0xff,
Mask = uint.MaxValue,
Read = 1 << 0,
Write = 1 << 1,
Execute = 1 << 2,
DontCare = 1 << 28,
ReadAndWrite = Read | Write,
ReadAndExecute = Read | Execute

32
Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
View file

@ -819,6 +819,38 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
return process.MemoryManager.SetHeapSize(size, out position);
}
public KernelResult SetMemoryPermission(ulong address, ulong size, KMemoryPermission permission)
{
if (!PageAligned(address))
{
return KernelResult.InvalidAddress;
}
if (!PageAligned(size) || size == 0)
{
return KernelResult.InvalidSize;
}
if (address + size <= address)
{
return KernelResult.InvalidMemState;
}
if (permission == KMemoryPermission.None || (permission | KMemoryPermission.Write) != KMemoryPermission.ReadAndWrite)
{
return KernelResult.InvalidPermission;
}
KProcess currentProcess = KernelStatic.GetCurrentProcess();
if (!currentProcess.MemoryManager.InsideAddrSpace(address, size))
{
return KernelResult.InvalidMemState;
}
return currentProcess.MemoryManager.SetMemoryPermission(address, size, permission);
}
public KernelResult SetMemoryAttribute(
ulong position,
ulong size,

8
Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall32.cs
View file

@ -88,6 +88,14 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
return result;
}
public KernelResult SetMemoryPermission32(
[R(0)] ulong position,
[R(1)] ulong size,
[R(2)] KMemoryPermission permission)
{
return _syscall.SetMemoryPermission(position, size, permission);
}
public KernelResult SetMemoryAttribute32(
[R(0)] uint position,
[R(1)] uint size,

8
Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall64.cs
View file

@ -109,6 +109,14 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
return _syscall.SetHeapSize(size, out position);
}
public KernelResult SetMemoryPermission64(
[R(0)] ulong position,
[R(1)] ulong size,
[R(2)] KMemoryPermission permission)
{
return _syscall.SetMemoryPermission(position, size, permission);
}
public KernelResult SetMemoryAttribute64(
[R(0)] ulong position,
[R(1)] ulong size,

2
Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallTable.cs
View file

@ -25,6 +25,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
Dictionary<int, string> svcFuncs64 = new Dictionary<int, string>
{
{ 0x01, nameof(Syscall64.SetHeapSize64) },
{ 0x02, nameof(Syscall64.SetMemoryPermission64) },
{ 0x03, nameof(Syscall64.SetMemoryAttribute64) },
{ 0x04, nameof(Syscall64.MapMemory64) },
{ 0x05, nameof(Syscall64.UnmapMemory64) },
@ -94,6 +95,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
Dictionary<int, string> svcFuncs32 = new Dictionary<int, string>
{
{ 0x01, nameof(Syscall32.SetHeapSize32) },
{ 0x02, nameof(Syscall32.SetMemoryPermission32) },
{ 0x03, nameof(Syscall32.SetMemoryAttribute32) },
{ 0x04, nameof(Syscall32.MapMemory32) },
{ 0x05, nameof(Syscall32.UnmapMemory32) },