Add 64-bit support to browser blacklisting

chrome_elf/blacklist/blacklist_interceptions.cc

Index: chrome_elf/blacklist/blacklist_interceptions.cc
diff --git a/chrome_elf/blacklist/blacklist_interceptions.cc b/chrome_elf/blacklist/blacklist_interceptions.cc
index d0f64ea3721c0da47c368529ef6c53d254f12b60..236e5f6d3846b71d5c3b8075dd315b4c8c6d1638 100644
--- a/chrome_elf/blacklist/blacklist_interceptions.cc
+++ b/chrome_elf/blacklist/blacklist_interceptions.cc
@@ -169,6 +169,12 @@ bool IsSameAsCurrentProcess(HANDLE process) {
 }  // namespace
 
 namespace blacklist {
+#if defined(_WIN64)
+// Allocate storage for the pointer to the old NtMapViewOfSectionFunction.
+#pragma section(".oldntmap",write,read)
+__declspec(allocate(".oldntmap"))
+NtMapViewOfSectionFunction g_nt_map_view_of_section_func = NULL;
+#endif
 
 bool InitializeInterceptImports() {
   g_nt_query_section_func = reinterpret_cast<NtQuerySectionFunction>(
@@ -229,4 +235,13 @@ SANDBOX_INTERCEPT NTSTATUS WINAPI BlNtMapViewOfSection(
   return ret;
 }
 
+NTSTATUS WINAPI BlNtMapViewOfSection64(
+    HANDLE section, HANDLE process, PVOID *base, ULONG_PTR zero_bits,
+    SIZE_T commit_size, PLARGE_INTEGER offset, PSIZE_T view_size,
+    SECTION_INHERIT inherit, ULONG allocation_type, ULONG protect) {
+  return BlNtMapViewOfSection(g_nt_map_view_of_section_func, section, process,
+                              base, zero_bits, commit_size, offset, view_size,
+                              inherit, allocation_type, protect);
+}
+
 }  // namespace blacklist