os: add UnsafeMemory apis

libraries/libstratosphere/include/stratosphere/os.hpp

@@ -29,6 +29,7 @@
 #include <stratosphere/os/os_process_memory_api.hpp>
 #include <stratosphere/os/os_process_code_memory_api.hpp>
 #include <stratosphere/os/os_insecure_memory_api.hpp>
+#include <stratosphere/os/os_unsafe_memory_api.hpp>
 #include <stratosphere/os/os_random.hpp>
 #include <stratosphere/os/os_mutex.hpp>
 #include <stratosphere/os/os_condition_variable.hpp>

libraries/libstratosphere/include/stratosphere/os/os_unsafe_memory_api.hpp

@@ -0,0 +1,25 @@
+/*
+ * 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/>.
+ */
+
+#pragma once
+#include <stratosphere/os/os_memory_common.hpp>
+
+namespace ams::os {
+
+    Result AllocateUnsafeMemory(uintptr_t *out_address, size_t size);
+    Result FreeUnsafeMemory(uintptr_t address, size_t size);
+
+}

libraries/libstratosphere/source/os/impl/os_insecure_memory_impl.os.horizon.cpp

@@ -24,6 +24,7 @@ namespace ams::os::impl {
         R_RETURN(impl::GetAslrSpaceManager().MapAtRandomAddress(out_address,
             [](uintptr_t map_address, size_t map_size) -> Result {
                 R_TRY_CATCH(svc::MapInsecureMemory(map_address, map_size)) {
+                    R_CONVERT(svc::ResultOutOfMemory,          os::ResultOutOfMemory())
                     R_CONVERT(svc::ResultInvalidCurrentMemory, os::ResultInvalidCurrentMemoryState())
                 } R_END_TRY_CATCH_WITH_ABORT_UNLESS;
 

libraries/libstratosphere/source/os/impl/os_unsafe_memory_impl.hpp

@@ -0,0 +1,27 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::os::impl {
+
+    class UnsafeMemoryImpl {
+        public:
+            static Result AllocateUnsafeMemoryImpl(uintptr_t *out_address, size_t size);
+            static Result FreeUnsafeMemoryImpl(uintptr_t address, size_t size);
+    };
+
+}

libraries/libstratosphere/source/os/impl/os_unsafe_memory_impl.os.horizon.cpp

@@ -0,0 +1,54 @@
+/*
+ * 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 "os_unsafe_memory_impl.hpp"
+#include "os_aslr_space_manager.hpp"
+
+namespace ams::os::impl {
+
+    Result UnsafeMemoryImpl::AllocateUnsafeMemoryImpl(uintptr_t *out_address, size_t size) {
+        /* Map at a random address. */
+        R_RETURN(impl::GetAslrSpaceManager().MapAtRandomAddress(out_address,
+            [](uintptr_t map_address, size_t map_size) -> Result {
+                R_TRY_CATCH(svc::MapPhysicalMemoryUnsafe(map_address, map_size)) {
+                    R_CONVERT(svc::ResultOutOfResource,        os::ResultOutOfResource())
+                    R_CONVERT(svc::ResultOutOfMemory,          os::ResultOutOfMemory())
+                    R_CONVERT(svc::ResultInvalidCurrentMemory, os::ResultInvalidCurrentMemoryState())
+                    R_CONVERT(svc::ResultLimitReached,         os::ResultOutOfMemory())
+                } R_END_TRY_CATCH_WITH_ABORT_UNLESS;
+
+                R_SUCCEED();
+            },
+            [](uintptr_t map_address, size_t map_size) -> void {
+                R_ABORT_UNLESS(UnsafeMemoryImpl::FreeUnsafeMemoryImpl(map_address, map_size));
+            },
+            size,
+            0
+        ));
+    }
+
+    Result UnsafeMemoryImpl::FreeUnsafeMemoryImpl(uintptr_t address, size_t size) {
+        R_TRY_CATCH(svc::UnmapPhysicalMemoryUnsafe(address, size)) {
+            R_CONVERT(svc::ResultOutOfResource,        os::ResultOutOfResource())
+            R_CONVERT(svc::ResultOutOfMemory,          os::ResultOutOfResource())
+            R_CONVERT(svc::ResultInvalidCurrentMemory, os::ResultBusy())
+            R_CONVERT(svc::ResultInvalidMemoryRegion,  os::ResultInvalidParameter())
+        } R_END_TRY_CATCH_WITH_ABORT_UNLESS;
+
+        R_SUCCEED();
+    }
+
+}

libraries/libstratosphere/source/os/os_unsafe_memory.cpp

@@ -0,0 +1,39 @@
+/*
+ * 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 "impl/os_unsafe_memory_impl.hpp"
+
+namespace ams::os {
+
+    Result AllocateUnsafeMemory(uintptr_t *out_address, size_t size) {
+        /* Check arguments. */
+        AMS_ASSERT(size > 0);
+        AMS_ASSERT(util::IsAligned(size, os::MemoryPageSize));
+
+        /* Allocate memory. */
+        R_RETURN(impl::UnsafeMemoryImpl::AllocateUnsafeMemoryImpl(out_address, size));
+    }
+
+    Result FreeUnsafeMemory(uintptr_t address, size_t size) {
+        /* Check arguments. */
+        AMS_ASSERT(util::IsAligned(address, os::MemoryPageSize));
+        AMS_ASSERT(util::IsAligned(size, os::MemoryPageSize));
+
+        /* Free memory. */
+        R_RETURN(impl::UnsafeMemoryImpl::FreeUnsafeMemoryImpl(address, size));
+    }
+
+}