ams-mtc: add ams-mtc

2025-11-09 15:44:33 -05:00
parent ac42e7af43
commit a76c2b33b6
3765 changed files with 568544 additions and 16 deletions
--- a/Source/Atmosphere-MTC-Unlock/stratosphere/memlet/source/memlet_service.cpp
+++ b/Source/Atmosphere-MTC-Unlock/stratosphere/memlet/source/memlet_service.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "memlet_service.hpp"
+
+namespace ams::memlet {
+
+    Result Service::CreateAppletSharedMemory(sf::Out<u64> out_size, sf::OutMoveHandle out_handle, u64 desired_size) {
+        /* Create a handle to set the output to when done. */
+        os::NativeHandle handle = os::InvalidNativeHandle;
+        ON_SCOPE_EXIT { out_handle.SetValue(handle, true); };
+
+        /* Check that the requested size has megabyte alignment and isn't too big. */
+        R_UNLESS(util::IsAligned(desired_size, 1_MB), os::ResultInvalidParameter());
+        R_UNLESS(desired_size <= 128_MB,              os::ResultInvalidParameter());
+
+        /* Try to create a shared memory of the desired size, giving up 1 MB each iteration. */
+        os::SharedMemoryType shmem = {};
+        while (true) {
+            /* If we have zero desired-size left, we've failed. */
+            R_UNLESS(desired_size > 0, os::ResultOutOfMemory());
+
+            /* Try to create a shared memory. */
+            if (R_FAILED(os::CreateSharedMemory(std::addressof(shmem), desired_size, os::MemoryPermission_ReadWrite, os::MemoryPermission_ReadWrite))) {
+                /* We failed, so decrease the size to see if that works. */
+                desired_size -= 1_MB;
+                continue;
+            }
+
+            /* We successfully created the shared memory. */
+            break;
+        }
+
+        /* Get the native handle for the shared memory we created. */
+        handle = os::GetSharedMemoryHandle(std::addressof(shmem));
+
+        /* HACK: Clear the shared memory object, since we've stolen its handle, and there's no "correct" way to detach. */
+        shmem = {};
+
+        /* We successfully created a shared memory! */
+        *out_size = desired_size;
+        R_SUCCEED();
+    }
+
+}