More NCSD loading

src/core/loader/ncch.cpp

@@ -0,0 +1,30 @@
+#include "loader/ncch.hpp"
+
+bool NCCH::loadFromHeader(u8* header) {
+    const u8* exheader = &header[0x200]; // Extended NCCH header
+
+    if (header[0x100] != 'N' || header[0x101] != 'C' || header[0x102] != 'C' || header[0x103] != 'H') {
+        printf("Invalid header on NCCH\n");
+        return false;
+    }
+
+    size = u64(*(u32*)&header[0x104]) * mediaUnit; // TODO: Maybe don't type pun because big endian will break
+
+    // Read NCCH flags
+    isNew3DS = header[0x188 + 4] == 2;
+    mountRomFS = (header[0x188 + 7] & 0x1) != 0x1;
+    encrypted = (header[0x188 + 7] & 0x4) != 0x4;
+
+    compressExeFS = (exheader[0xD] & 1) != 0;
+
+    if (compressExeFS) {
+        Helpers::panic("Compressed ExeFS");
+    }
+
+    if (encrypted) {
+        Helpers::panic("Encrypted NCCH partition");
+    }
+
+    initialized = true;
+    return true;
+}