1 files changed, 89 insertions, 0 deletions
diff --git a/winsup/mingw/dllcrt1.c b/winsup/mingw/dllcrt1.c
new file mode 100644
index 000000000..a0055d8b0
--- /dev/null
+++ b/winsup/mingw/dllcrt1.c
@@ -0,0 +1,89 @@
+/*
+ * dllcrt1.c
+ *
+ * Initialization code for DLLs.
+ *
+ * This file is part of the Mingw32 package.
+ *
+ * Contributors:
+ *  Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
+ *  DLL support adapted from Gunther Ebert <gunther.ebert@ixos-leipzig.de>
+ *  Maintained by Mumit Khan <khan@xraylith.wisc.EDU>
+ *
+ *  THIS SOFTWARE IS NOT COPYRIGHTED
+ *
+ *  This source code is offered for use in the public domain. You may
+ *  use, modify or distribute it freely.
+ *
+ *  This code is distributed in the hope that it will be useful but
+ *  WITHOUT ANY WARRANTY. ALL WARRENTIES, EXPRESS OR IMPLIED ARE HEREBY
+ *  DISCLAMED. This includes but is not limited to warrenties of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Revision$
+ * $Author$
+ * $Date$
+ * 
+ */
+
+#include <stdio.h>
+#include <io.h>
+#include <process.h>
+#include <windows.h>
+
+/* Unlike normal crt1, I don't initialize the FPU, because the process
+ * should have done that already. I also don't set the file handle modes,
+ * because that would be rude. */
+
+#ifdef	__GNUC__
+extern void __main ();
+extern void __do_global_dtors ();
+#endif
+
+extern BOOL WINAPI DllMain (HANDLE, DWORD, LPVOID);
+
+BOOL WINAPI
+DllMainCRTStartup (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
+{
+  BOOL bRet;
+
+  if (dwReason == DLL_PROCESS_ATTACH)
+    {
+#ifdef	__GNUC__
+      /* From libgcc.a, calls global class constructors. */
+      __main ();
+#endif
+    }
+
+  /*
+   * Call the user-supplied DllMain subroutine
+   * NOTE: DllMain is optional, so libmingw32.a includes a stub
+   *       which will be used if the user does not supply one.
+   */
+  bRet = DllMain (hDll, dwReason, lpReserved);
+
+#ifdef	__GNUC__
+  if (dwReason == DLL_PROCESS_DETACH)
+    {
+      /* From libgcc.a, calls global class destructors. */
+      __do_global_dtors ();
+    }
+#endif
+
+  return bRet;
+}
+
+/*
+ * For the moment a dummy atexit. Atexit causes problems in DLLs, especially
+ * if they are dynamically loaded. For now atexit inside a DLL does nothing.
+ * NOTE: We need this even if the DLL author never calls atexit because
+ *       the global constructor function __do_global_ctors called from __main
+ *       will attempt to register __do_global_dtors using atexit.
+ *       Thanks to Andrey A. Smirnov for pointing this one out.
+ */
+int
+atexit (void (*pfn) ())
+{
+  return 0;
+}
+