[APT/CFG/Kernel] Smash Bros stuff

include/memory.hpp

@@ -235,4 +235,6 @@ public:
 	u8* getDSPMem() { return dspRam; }
 	u8* getDSPDataMem() { return &dspRam[DSP_DATA_MEMORY_OFFSET]; }
 	u8* getDSPCodeMem() { return &dspRam[DSP_CODE_MEMORY_OFFSET]; }
+
+	u32 getUsedUserMem() { return usedUserMemory; }
 };

include/services/apt.hpp

@@ -8,6 +8,10 @@
 // Yay, more circular dependencies
 class Kernel;
 
+enum class ConsoleModel : u32 {
+	Old3DS, New3DS
+};
+
 class APTService {
 	Handle handle = KernelHandles::APT;
 	Memory& mem;
@@ -17,6 +21,8 @@ class APTService {
 	std::optional<Handle> notificationEvent = std::nullopt;
 	std::optional<Handle> resumeEvent = std::nullopt;
 
+	ConsoleModel model = ConsoleModel::Old3DS;
+
 	MAKE_LOG_FUNCTION(log, aptLogger)
 
 	// Service commands
@@ -34,6 +40,7 @@ class APTService {
 	void replySleepQuery(u32 messagePointer);
 	void setApplicationCpuTimeLimit(u32 messagePointer);
 	void setScreencapPostPermission(u32 messagePointer);
+	void theSmashBrosFunction(u32 messagePointer);
 
 	// Percentage of the syscore available to the application, between 5% and 89%
 	u32 cpuTimeLimit;

src/core/kernel/kernel.cpp

@@ -194,6 +194,13 @@ void Kernel::getProcessInfo() {
 	}
 
 	switch (type) {
+		// According to 3DBrew: Amount of private (code, data, heap) memory used by the process + total supervisor-mode
+		// stack size + page-rounded size of the external handle table
+		case 2:
+			regs[1] = mem.getUsedUserMem();
+			regs[2] = 0;
+			break;
+
 		case 20: // Returns 0x20000000 - <linear memory base vaddr for process>
 			regs[1] = PhysicalAddrs::FCRAM - mem.getLinearHeapVaddr();
 			regs[2] = 0;

src/core/services/apt.cpp

@@ -16,14 +16,8 @@ namespace APTCommands {
 		GetApplicationCpuTimeLimit = 0x00500040,
 		SetScreencapPostPermission = 0x00550040,
 		CheckNew3DSApp = 0x01010000,
-		CheckNew3DS = 0x01020000
+		CheckNew3DS = 0x01020000,
-	};
+		TheSmashBrosFunction = 0x01030000
-}
-
-namespace Model {
-	enum : u8 {
-		Old3DS = 0,
-		New3DS = 1
 	};
 }
 
@@ -61,6 +55,7 @@ void APTService::handleSyncRequest(u32 messagePointer) {
 		case APTCommands::ReplySleepQuery: replySleepQuery(messagePointer); break;
 		case APTCommands::SetApplicationCpuTimeLimit: setApplicationCpuTimeLimit(messagePointer); break;
 		case APTCommands::SetScreencapPostPermission: setScreencapPostPermission(messagePointer); break;
+		case APTCommands::TheSmashBrosFunction: theSmashBrosFunction(messagePointer); break;
 		default: Helpers::panic("APT service requested. Command: %08X\n", command);
 	}
 }
@@ -79,7 +74,7 @@ void APTService::appletUtility(u32 messagePointer) {
 void APTService::checkNew3DS(u32 messagePointer) {
 	log("APT::CheckNew3DS\n");
 	mem.write32(messagePointer + 4, Result::Success);
-	mem.write8(messagePointer + 8, Model::Old3DS); // u8, Status (0 = Old 3DS, 1 = New 3DS)
+	mem.write8(messagePointer + 8, (model == ConsoleModel::New3DS) ? 1 : 0); // u8, Status (0 = Old 3DS, 1 = New 3DS)
 }
 
 // TODO: Figure out the slight way this differs from APT::CheckNew3DS
@@ -193,4 +188,13 @@ void APTService::getSharedFont(u32 messagePointer) {
 	mem.write32(messagePointer + 4, Result::Success);
 	mem.write32(messagePointer + 8, fontVaddr);
 	mem.write32(messagePointer + 16, KernelHandles::FontSharedMemHandle);
+}
+
+// This function is entirely undocumented. We know Smash Bros uses it and that it normally writes 2 to cmdreply[2] on New 3DS
+// And that writing 1 stops it from accessing the ir:USER service for New 3DS HID use
+void APTService::theSmashBrosFunction(u32 messagePointer) {
+	log("APT: Called the elusive Smash Bros function\n");
+
+	mem.write32(messagePointer + 4, Result::Success);
+	mem.write32(messagePointer + 8, (model == ConsoleModel::New3DS) ? 2 : 1);
 }

src/core/services/cfg.cpp

@@ -87,6 +87,9 @@ void CFGService::getConfigInfoBlk2(u32 messagePointer) {
 	} else if (size == 4 && blockID == 0xB0003) { // Coordinates (latidude and longtitude) as s16
 		mem.write16(output, 0); // Latitude
 		mem.write16(output + 2, 0); // Longtitude
+	} else if (size == 2 && blockID == 0xA0001) { // Birthday
+		mem.write8(output, 5); // Month (May)
+		mem.write8(output + 1, 5); // Day (Fifth)
 	} else if (size == 8 && blockID == 0x30001) { // User time offset
 		printf("Read from user time offset field in NAND. TODO: What is this\n");
 		mem.write64(output, 0);