ASkyeye · April 29, 2025 12:27 · Apr 27, 2025 · Apr 27, 2025
diff --git a/hello.c b/hello.c
@@ -0,0 +1,11 @@
+
+// cl /D_NO_CRT_STDIO_INLINE /Os /O1 /GS- hello.c crt.c /link /nodefaultlib /subsystem:console msvcrt.lib kernel32.lib
+
+#include <stdio.h>
+
+int main(int argc, char *argv[]) {
+    for (int i=0; i<argc; i++) {
+        printf("argv[%i]: %s\n", i, argv[i]);
+    }
+    return 0;
+}
diff --git a/crt.c b/crt.c
@@ -0,0 +1,51 @@
+/**
+    Compile with your C console project.
+*/
+#include <stdio.h>
+#include <windows.h>
+
+#define __UNKNOWN_APP    0
+#define __CONSOLE_APP    1
+#define __GUI_APP        2
+
+int main(int, char **, char **);
+int wmain(int, wchar_t **, wchar_t **);
+
+typedef void (__cdecl * new_handler) ();
+
+typedef struct _startupinfo_t {
+    int newmode;
+    new_handler newh;
+} _startupinfo;
+
+int __getmainargs(int *argc, char ***argv, char ***penv, int glob, _startupinfo *info);
+int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***penv, int glob, _startupinfo *info);
+
+#ifndef _UNICODE
+    void mainCRTStartup(void)
+#else
+    void wmainCRTStartup(void)
+#endif
+{
+    _startupinfo si = {0};
+    int argc, ret;
+
+    __set_app_type(__CONSOLE_APP);
+
+    #ifndef _UNICODE
+        char **argv = NULL;
+        char **envp = NULL;
+
+        __getmainargs(&argc, &argv, &envp, 0, &si);
+        ret = main(argc, argv, envp);
+    #else
+        wchar_t **argv = NULL;
+        wchar_t **wenvp = NULL;
+
+        __wgetmainargs(&argc, &wargv, &wenvp, 0, &si);
+        ret = wmain(argc, wargv, wenvp);
+    #endif
+
+    ExitProcess(ret);
+}
+
diff --git a/dll2def.py b/dll2def.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+"""
+dll2def.py - Create a module-definition (.def) file from a Windows DLL.
+
+Usage
+-----
+    python dll2def.py library.dll  [optional_output.def]
+
+The script writes a .def file next to the DLL (or to the explicitly
+supplied output path) and prints a short summary.
+
+Requires
+--------
+    pip install pefile
+"""
+from __future__ import annotations
+import argparse
+import sys
+from pathlib import Path
+import pefile
+
+
+def build_def_text(dll_path: Path) -> str:
+    """Return the complete .def file text for *dll_path*."""
+    pe = pefile.PE(dll_path.as_posix(), fast_load=True)
+    pe.parse_data_directories(directories=[pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_EXPORT']])
+
+    if not hasattr(pe, 'DIRECTORY_ENTRY_EXPORT'):
+        raise ValueError(f"'{dll_path.name}' has no export table.")
+
+    lines: list[str] = []
+    lines.append(f'LIBRARY "{dll_path.name}"')
+    lines.append('EXPORTS')
+
+    for sym in pe.DIRECTORY_ENTRY_EXPORT.symbols:
+        # Symbol names can be None (export-by-ordinal only)
+        name = sym.name.decode(errors='replace') if sym.name else f'#{sym.ordinal}'
+        lines.append(f'    {name}')
+
+    # A final newline keeps MSVC's LIB.EXE happy
+    return '\n'.join(lines) + '\n'
+
+
+def parse_args(argv: list[str]) -> argparse.Namespace:
+    p = argparse.ArgumentParser(description="Generate a .def file from a DLL's export table.")
+    p.add_argument('dll', type=Path, help='Path to the input DLL')
+    p.add_argument('out', nargs='?', type=Path,
+                   help='Optional .def output path (default: DLL name with .def extension)')
+    return p.parse_args(argv)
+
+
+def main(argv: list[str] | None = None) -> None:
+    args = parse_args(argv or sys.argv[1:])
+
+    dll_path: Path = args.dll.expanduser().resolve()
+    if not dll_path.is_file():
+        sys.exit(f"Error: '{dll_path}' is not a file.")
+
+    out_path: Path = (args.out or dll_path.with_suffix('.def')).expanduser().resolve()
+
+    try:
+        def_text = build_def_text(dll_path)
+    except Exception as exc:
+        sys.exit(f"Failed to read exports: {exc}")
+
+    out_path.write_text(def_text, encoding='utf-8')
+    print(f"Wrote {out_path} ({len(def_text.splitlines()) - 2} exports)")
+
+
+if __name__ == '__main__':
+    main()
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