browser/app/winlauncher/NtLoaderAPI.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/LoaderAPIInterfaces.h"
   8
   9 #include "freestanding/CheckForCaller.h"
  10 #include "freestanding/LoaderPrivateAPI.h"
  11
  12 namespace mozilla {
  13
  14 extern "C" MOZ_EXPORT nt::LoaderAPI* GetNtLoaderAPI(
  15     nt::LoaderObserver* aNewObserver) {
  16   // Make sure the caller is inside mozglue.dll - we don't want to allow
  17   // external access to this function, as it contains details about
  18   // the SharedSection which is used to sandbox future child processes.
  19   const bool isCallerMozglue =
  20       CheckForAddress(RETURN_ADDRESS(), L"mozglue.dll");
  21   MOZ_ASSERT(isCallerMozglue);
  22   if (!isCallerMozglue) {
  23     return nullptr;
  24   }
  25
  26   freestanding::EnsureInitialized();
  27   freestanding::LoaderPrivateAPI& api = freestanding::gLoaderPrivateAPI;
  28   api.SetObserver(aNewObserver);
  29
  30   return &api;
  31 }
  32
  33 }  // namespace mozilla