Better process implementation (#491)

* Initial implementation of KProcess

* Some improvements to the memory manager, implement back guest stack trace printing

* Better GetInfo implementation, improve checking in some places with information from process capabilities

* Allow the cpu to read/write from the correct memory locations for accesses crossing a page boundary

* Change long -> ulong for address/size on memory related methods to avoid unnecessary casts

* Attempt at implementing ldr:ro with new KProcess

* Allow BSS with size 0 on ldr:ro

* Add checking for memory block slab heap usage, return errors if full, exit gracefully

* Use KMemoryBlockSize const from KMemoryManager

* Allow all methods to read from non-contiguous locations

* Fix for TransactParcelAuto

* Address PR feedback, additionally fix some small issues related to the KIP loader and implement SVCs GetProcessId, GetProcessList, GetSystemInfo, CreatePort and ManageNamedPort

* Fix wrong check for source pages count from page list on MapPhysicalMemory

* Fix some issues with UnloadNro on ldr:ro

1 files changed, 59 insertions, 5 deletions

diff --git a/Ryujinx.HLE/HOS/Kernel/KSharedMemory.cs b/Ryujinx.HLE/HOS/Kernel/KSharedMemory.cs
index cdd31667..a440438b 100644
--- a/Ryujinx.HLE/HOS/Kernel/KSharedMemory.cs
+++ b/Ryujinx.HLE/HOS/Kernel/KSharedMemory.cs
@@ -1,14 +1,68 @@
+using Ryujinx.Common;
+
 namespace Ryujinx.HLE.HOS.Kernel
 {
     class KSharedMemory
     {
-        public long PA   { get; private set; }
-        public long Size { get; private set; }
+        private KPageList PageList;
+
+        private long OwnerPid;
+
+        private MemoryPermission OwnerPermission;
+        private MemoryPermission UserPermission;
+
+        public KSharedMemory(
+            KPageList        PageList,
+            long             OwnerPid,
+            MemoryPermission OwnerPermission,
+            MemoryPermission UserPermission)
+        {
+            this.PageList        = PageList;
+            this.OwnerPid        = OwnerPid;
+            this.OwnerPermission = OwnerPermission;
+            this.UserPermission  = UserPermission;
+        }
 
-        public KSharedMemory(long PA, long Size)
+        public KernelResult MapIntoProcess(
+            KMemoryManager   MemoryManager,
+            ulong            Address,
+            ulong            Size,
+            KProcess         Process,
+            MemoryPermission Permission)
         {
-            this.PA   = PA;
-            this.Size = Size;
+            ulong PagesCountRounded = BitUtils.DivRoundUp(Size, KMemoryManager.PageSize);
+
+            if (PageList.GetPagesCount() != PagesCountRounded)
+            {
+                return KernelResult.InvalidSize;
+            }
+
+            MemoryPermission ExpectedPermission = Process.Pid == OwnerPid
+                ? OwnerPermission
+                : UserPermission;
+
+            if (Permission != ExpectedPermission)
+            {
+                return KernelResult.InvalidPermission;
+            }
+
+            return MemoryManager.MapPages(Address, PageList, MemoryState.SharedMemory, Permission);
+        }
+
+        public KernelResult UnmapFromProcess(
+            KMemoryManager   MemoryManager,
+            ulong            Address,
+            ulong            Size,
+            KProcess         Process)
+        {
+            ulong PagesCountRounded = BitUtils.DivRoundUp(Size, KMemoryManager.PageSize);
+
+            if (PageList.GetPagesCount() != PagesCountRounded)
+            {
+                return KernelResult.InvalidSize;
+            }
+
+            return MemoryManager.UnmapPages(Address, PageList, MemoryState.SharedMemory);
         }
     }
 }
\ No newline at end of file