Initial commit

backends/plugins/3ds/3ds-provider.cpp

@@ -0,0 +1,72 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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/>.
+ *
+ */
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+#include "common/scummsys.h"
+
+#if defined(DYNAMIC_MODULES) && defined(__3DS__)
+
+#include "backends/plugins/3ds/3ds-provider.h"
+#include "backends/plugins/elf/arm-loader.h"
+
+#include "common/debug.h"
+
+#include <3ds.h>
+
+extern uint32 __end__; // End of the main program in memory. Set by the linker.
+
+static uint32 alignUp(uint32 ptr, uint32 align) {
+	return (ptr + align - 1) & ~(align - 1);
+}
+
+class CTRDLObject : public ARMDLObject {
+protected:
+	static const uint32 kPageSize = 0x1000;
+
+	uint32 _segmentHeapAddress;
+
+	void flushDataCache(void *ptr, uint32 len) const override {
+		svcFlushProcessDataCache(CUR_PROCESS_HANDLE, (uint32)ptr, len);
+	}
+
+	void protectMemory(void *ptr, uint32 len, int prot) const override {
+		debug(2, "elfloader: Protecting memory at %p, len %d with %d", ptr, len, prot);
+
+		uint32 ctrFlags = 0;
+		if (prot & PF_R) ctrFlags |= MEMPERM_READ;
+		if (prot & PF_W) ctrFlags |= MEMPERM_WRITE;
+		if (prot & PF_X) ctrFlags |= MEMPERM_EXECUTE;
+
+		// The kernel expects the range to be aligned to page boundaries
+		len = alignUp(len, kPageSize);
+
+		Handle currentHandle;
+		svcDuplicateHandle(&currentHandle, CUR_PROCESS_HANDLE);
+		svcControlProcessMemory(currentHandle, (uint32)ptr, 0, len, MEMOP_PROT, ctrFlags);
+		svcCloseHandle(currentHandle);
+	}
+};
+
+Plugin *CTRPluginProvider::createPlugin(const Common::FSNode &node) const {
+	return new TemplatedELFPlugin<CTRDLObject>(node.getPath());
+}
+
+#endif // defined(DYNAMIC_MODULES) && defined(__3DS__)