1 files changed, 118 insertions, 0 deletions
diff --git a/gdbsupport/gdb-dlfcn.c b/gdbsupport/gdb-dlfcn.c
new file mode 100644
index 00000000000..1a755bdd37c
--- /dev/null
+++ b/gdbsupport/gdb-dlfcn.c
@@ -0,0 +1,118 @@
+/* Platform independent shared object routines for GDB.
+
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "common-defs.h"
+#include "gdb-dlfcn.h"
+
+#ifdef HAVE_DLFCN_H
+#include <dlfcn.h>
+#elif __MINGW32__
+#include <windows.h>
+#else
+/* Unsupported configuration. */
+#define NO_SHARED_LIB
+#endif
+
+#ifdef NO_SHARED_LIB
+
+gdb_dlhandle_up
+gdb_dlopen (const char *filename)
+{
+  gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
+}
+
+void *
+gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
+{
+  gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
+}
+
+void
+dlclose_deleter::operator() (void *handle) const
+{
+  gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
+}
+
+int
+is_dl_available (void)
+{
+  return 0;
+}
+
+#else /* NO_SHARED_LIB */
+
+gdb_dlhandle_up
+gdb_dlopen (const char *filename)
+{
+  void *result;
+#ifdef HAVE_DLFCN_H
+  result = dlopen (filename, RTLD_NOW);
+#elif __MINGW32__
+  result = (void *) LoadLibrary (filename);
+#endif
+  if (result != NULL)
+    return gdb_dlhandle_up (result);
+
+#ifdef HAVE_DLFCN_H
+  error (_("Could not load %s: %s"), filename, dlerror());
+#else
+  {
+    LPVOID buffer;
+    DWORD dw;
+
+    dw = GetLastError();
+
+    FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+                   FORMAT_MESSAGE_IGNORE_INSERTS,
+                   NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                   (LPTSTR) &buffer,
+                   0, NULL);
+
+    error (_("Could not load %s: %s"), filename, (char *) buffer);
+  }
+#endif
+}
+
+void *
+gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
+{
+#ifdef HAVE_DLFCN_H
+  return dlsym (handle.get (), symbol);
+#elif __MINGW32__
+  return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
+#endif
+}
+
+void
+dlclose_deleter::operator() (void *handle) const
+{
+#ifdef HAVE_DLFCN_H
+  dlclose (handle);
+#elif __MINGW32__
+  FreeLibrary ((HMODULE) handle);
+#endif
+}
+
+int
+is_dl_available (void)
+{
+  return 1;
+}
+
+#endif /* NO_SHARED_LIB */