some modify

mkramfs/Makefile

@@ -0,0 +1,8 @@
+CC := g++
+CFLAGS := -std=c++17
+
+
+mkramfs: main.cpp
+	$(CC) $(CFLAGS) -o mkramfs main.cpp
+
+clean:	$(RM) mkramfs

mkramfs/main.cpp

@@ -0,0 +1,37 @@
+#include <string.h>
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+typedef struct {
+    int Start;
+    int Size;
+    char name[256];
+} FILE_DESC;
+
+int main(int argc, char **argv) {
+    if (argc == 1) {
+        std::cout << "Usage:mkramfs <file1> <file2> ..." << std::endl;
+        return -1;
+    }
+    FILE_DESC descriptor[256] = {0};
+    std::ofstream ramfs("ramfs.img", std::ios::binary | std::ios::ate);
+    for (int i = 1; i < argc; i++) {
+        if (!std::filesystem::exists(std::filesystem::path(argv[i]))) {
+            std::cout << "file does not exist! - " << argv[i] << std::endl;
+            continue;
+        }
+        descriptor[i].Start = descriptor[i - 1].Start + descriptor[i - 1].Size;
+        descriptor[i].Size =
+            std::filesystem::file_size(std::filesystem::path(argv[i]));
+        strncpy(descriptor[i].name,
+                std::filesystem::path(argv[i]).filename().c_str(), 255);
+    }
+    ramfs.write(reinterpret_cast<char *>(descriptor), sizeof(descriptor));
+    for (int i = 1; i < argc; i++) {
+        std::ifstream file(argv[i], std::ios::binary);
+        ramfs << file.rdbuf();
+        file.close();
+    }
+    ramfs.close();
+}