1 files changed, 43 insertions, 0 deletions
diff --git a/security/manager/ssl/ipcclientcerts/dynamic-library/stub.c b/security/manager/ssl/ipcclientcerts/dynamic-library/stub.c
new file mode 100644
index 0000000000..f679e5dfd4
--- /dev/null
+++ b/security/manager/ssl/ipcclientcerts/dynamic-library/stub.c
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "pkcs11.h"
+
+// The build system builds the rust library ipcclientcerts as a static library
+// called ipcclientcerts_static. On macOS and Windows, that static library can
+// be linked with an empty file and turned into a shared library with the
+// function C_GetFunctionList exposed. This allows that shared library to be
+// used as a PKCS#11 module (see osclientcerts).
+// Unfortunately, on Linux, exposing the C_GetFunctionList in the static
+// library doesn't work for some unknown reason. As a workaround, this file
+// declares its own C_GetFunctionList that can be exposed in the shared
+// library. It then calls the function IPCCC_GetFunctionList exposed
+// (internally to the linkage in question) by ipcclientcerts. This enables
+// the build system to ultimately turn ipcclientcerts into a shared library
+// that exposes a C_GetFunctionList function, meaning it can be used as a
+// PKCS#11 module.
+
+CK_RV IPCCC_GetFunctionList(CK_FUNCTION_LIST_PTR_PTR ppFunctionList);
+
+CK_RV C_GetFunctionList(CK_FUNCTION_LIST_PTR_PTR ppFunctionList) {
+  return IPCCC_GetFunctionList(ppFunctionList);
+}
+
+// On MinGW there's a toolchain mismatch that results in _Unwind_Resume being
+// undefined. It's never going to get called here anyway, so this defines it to
+// satisfy the linker. See bug 1745855 and
+// https://github.com/rust-lang/rust/issues/79609#issuecomment-987107562.
+#ifdef __MINGW32__
+#  include "mozilla/Assertions.h"
+void _Unwind_Resume() { MOZ_CRASH("Unexpected call to _Unwind_*"); }
+void _Unwind_GetDataRelBase() { _Unwind_Resume(); }
+void _Unwind_GetTextRelBase() { _Unwind_Resume(); }
+void _Unwind_GetLanguageSpecificData() { _Unwind_Resume(); }
+void _Unwind_GetIPInfo() { _Unwind_Resume(); }
+void _Unwind_GetRegionStart() { _Unwind_Resume(); }
+void _Unwind_SetGR() { _Unwind_Resume(); }
+void _Unwind_SetIP() { _Unwind_Resume(); }
+void _GCC_specific_handler() { _Unwind_Resume(); }
+#endif