Add Loader service commands

libctru/include/3ds.h

@@ -63,6 +63,7 @@ extern "C" {
 #include <3ds/services/news.h>
 #include <3ds/services/qtm.h>
 #include <3ds/services/srvpm.h>
+#include <3ds/services/loader.h>
 #include <3ds/services/y2r.h>
 #include <3ds/services/hb.h>
 

libctru/include/3ds/services/loader.h

@@ -0,0 +1,45 @@
+/**
+ * @file loader.h
+ * @brief LOADER Service
+ */
+
+#pragma once
+
+#include <3ds/exheader.h>
+#include <3ds/services/fs.h>
+
+/// Initializes LOADER.
+Result loaderInit(void);
+
+/// Exits LOADER.
+void loaderExit(void);
+
+/**
+ * @brief Loads a program and returns a process handle to the newly created process.
+ * @param[out] process Pointer to output the process handle to.
+ * @param programHandle The handle of the program to load.
+ */
+Result LOADER_LoadProcess(Handle* process, u64 programHandle);
+
+/**
+ * @brief Registers a program (along with its update).
+ * @param[out] programHandle Pointer to output the program handle to.
+ * @param titleId The program's title ID.
+ * @param mediaType The program's media type.
+ * @param updateTitleId The program update's title ID.
+ * @param updateMediaType The program update's media type.
+ */
+Result LOADER_RegisterProgram(u64* programHandle, u64 titleId, FS_MediaType mediaType, u64 updateTitleId, FS_MediaType updateMediaType);
+
+/**
+ * @brief Registers a program (along with its update).
+ * @param programHandle The handle of the program to unregister.
+ */
+Result LOADER_UnregisterProgram(u64 programHandle);
+
+/**
+ * @brief Retrives a program's main NCCH extended header info (SCI + ACI, see @ref ExHeader_Info).
+ * @param[out] exheaderInfo Pointer to output the main NCCH extended header info.
+ * @param programHandle The handle of the program to unregister
+ */
+Result LOADER_GetProgramInfo(ExHeader_Info* exheaderInfo, u64 programHandle);

libctru/source/services/loader.c

@@ -0,0 +1,93 @@
+#include <3ds/services/loader.h>
+#include <3ds/result.h>
+#include <3ds/svc.h>
+#include <3ds/srv.h>
+#include <3ds/synchronization.h>
+#include <3ds/ipc.h>
+
+static Handle loaderHandle;
+static int loaderRefCount;
+
+Result loaderInit(void)
+{
+	Result res;
+	if (AtomicPostIncrement(&loaderRefCount)) return 0;
+	res = srvGetServiceHandle(&loaderHandle, "Loader");
+	if (R_FAILED(res)) AtomicDecrement(&loaderRefCount);
+	return res;
+}
+
+void loaderExit(void)
+{
+	if (AtomicDecrement(&loaderRefCount)) return;
+	svcCloseHandle(loaderHandle);
+}
+
+Result LOADER_LoadProcess(Handle* process, u64 programHandle)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(1, 2, 0); // 0x10080
+	cmdbuf[1] = (u32)programHandle;
+	cmdbuf[2] = (u32)(programHandle >> 32);
+	
+	if(R_FAILED(ret = svcSendSyncRequest(loaderHandle))) return ret;
+
+	*process = cmdbuf[3];
+
+	return (Result)cmdbuf[1];
+}
+
+Result LOADER_RegisterProgram(u64* programHandle, u64 titleId, FS_MediaType mediaType, u64 updateTitleId, FS_MediaType updateMediaType)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(2, 8, 0); // 0x20200
+	cmdbuf[1] = (u32)titleId;
+	cmdbuf[2] = (u32)(titleId >> 32);
+	cmdbuf[3] = mediaType;
+
+	cmdbuf[5] = (u32)updateTitleId;
+	cmdbuf[6] = (u32)(updateTitleId >> 32);
+	cmdbuf[7] = updateMediaType;
+
+	if(R_FAILED(ret = svcSendSyncRequest(loaderHandle))) return ret;
+
+	*programHandle = ((u64)cmdbuf[2] << 32) | cmdbuf[3];
+
+	return (Result)cmdbuf[1];
+}
+
+Result LOADER_UnregisterProgram(u64 programHandle)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(3, 2, 0); // 0x30080
+	cmdbuf[1] = (u32)programHandle;
+	cmdbuf[2] = (u32)(programHandle >> 32);
+	
+	if(R_FAILED(ret = svcSendSyncRequest(loaderHandle))) return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+Result LOADER_GetProgramInfo(ExHeader_Info* exheaderInfo, u64 programHandle)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+	u32 *staticbufs = getThreadStaticBuffers();
+
+	cmdbuf[0] = IPC_MakeHeader(4, 2, 0); // 0x40080
+	cmdbuf[1] = (u32)programHandle;
+	cmdbuf[2] = (u32)(programHandle >> 32);
+
+	staticbufs[0] = IPC_Desc_StaticBuffer(0x400, 0);
+	staticbufs[1] = (u32)exheaderInfo;
+
+	if(R_FAILED(ret = svcSendSyncRequest(loaderHandle))) return ret;
+
+	return (Result)cmdbuf[1];
+}