Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/browser/app/winlauncher/freestanding/ntdll_freestanding.def b/browser/app/winlauncher/freestanding/ntdll_freestanding.def
new file mode 100644
index 0000000000..6e5e2685fe
--- /dev/null
+++ b/browser/app/winlauncher/freestanding/ntdll_freestanding.def
@@ -0,0 +1,25 @@
+; 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/.
+
+LIBRARY ntdll
+
+; When we compile with -freestanding, the compiler still requires implementation
+; of the four functions listed below.
+;
+; We could implement our own naive versions of these functions, but that
+; solution is less than ideal since the implementations must be extern and are
+; thus picked up by the entire firefox.exe binary. This denies the rest of
+; firefox.exe the benefit of optimized implementations. On Windows the
+; sandbox is linked into firefox.exe, so we cannot just shrug and
+; assume that a naive implementation will not have any effect on anything.
+;
+; There are, however, optimized implementations of these functions that are
+; exported by ntdll.dll. OTOH, they are not included in the ntdll.lib
+; import library. This .def file is used to build an import library that "fills
+; in the blanks" and allows us to link into the ntdll implementations.
+EXPORTS
+    memcmp
+    memcpy
+    memmove
+    memset