From 7901de2b75bf527790c3c24e6667b275e2ebeb2b Mon Sep 17 00:00:00 2001
From: Zach Hilman <zachhilman@gmail.com>
Date: Fri, 9 Nov 2018 17:02:50 -0500
Subject: svc: Implement svcCreateTransferMemory

Seems to be used and created identically to SharedMemory, so just reuse that.
---
 src/core/hle/kernel/svc.cpp | 36 +++++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

(limited to 'src/core/hle/kernel')

diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index 2e7c9d094..20af65ee7 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -1194,9 +1194,39 @@ static ResultCode ResetSignal(Handle handle) {
 
 /// Creates a TransferMemory object
 static ResultCode CreateTransferMemory(Handle* handle, VAddr addr, u64 size, u32 permissions) {
-    LOG_WARNING(Kernel_SVC, "(STUBBED) called addr=0x{:X}, size=0x{:X}, perms=0x{:08X}", addr, size,
-                permissions);
-    *handle = 0;
+    LOG_DEBUG(Kernel_SVC, "called addr=0x{:X}, size=0x{:X}, perms=0x{:08X}", addr, size,
+              permissions);
+
+    if (!Common::Is4KBAligned(addr)) {
+        LOG_ERROR(Kernel_SVC, "Address ({:016X}) is not page aligned!", addr);
+        return ERR_INVALID_ADDRESS;
+    }
+
+    if (!Common::Is4KBAligned(size) || size == 0) {
+        LOG_ERROR(Kernel_SVC, "Size ({:016X}) is not page aligned or equal to zero!", size);
+        return ERR_INVALID_ADDRESS;
+    }
+
+    if (addr + size <= addr) {
+        LOG_ERROR(Kernel_SVC, "Address and size cause overflow! (address={:016X}, size={:016X})",
+                  addr, size);
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+
+    if (permissions > static_cast<u32>(MemoryPermission::ReadWrite) ||
+        permissions == static_cast<u32>(MemoryPermission::Write)) {
+        LOG_ERROR(Kernel_SVC, "Invalid memory permissions for transfer memory! (perms={:08X})",
+                  permissions);
+        return ERR_INVALID_MEMORY_PERMISSIONS;
+    }
+
+    auto& kernel = Core::System::GetInstance().Kernel();
+    auto& handle_table = Core::CurrentProcess()->GetHandleTable();
+    const auto perms = static_cast<MemoryPermission>(permissions);
+    const auto shared_mem_handle = SharedMemory::Create(
+        kernel, handle_table.Get<Process>(CurrentProcess), size, perms, perms, addr);
+
+    CASCADE_RESULT(*handle, handle_table.Create(shared_mem_handle));
     return RESULT_SUCCESS;
 }
 
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