Add 64-bit support to browser blacklisting

chrome_elf/blacklist/blacklist_interceptions.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Implementation of NtMapViewOfSection intercept for 32 bit builds.
 //
 // TODO(robertshield): Implement the 64 bit intercept.
 
 #include "chrome_elf/blacklist/blacklist_interceptions.h"
 
@@ skipping 151 matching lines @@
 }
 
 bool IsSameAsCurrentProcess(HANDLE process) {
   return  (NtCurrentProcess == process) ||
           (::GetProcessId(process) == ::GetCurrentProcessId());
 }
 
 }  // namespace
 
 namespace blacklist {
+// 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;

[robertshield, 2014/01/07 18:30:47]

#if defined(_WIN64)?

[csharp, 2014/01/07 20:43:07]

Done.

 
 bool InitializeInterceptImports() {
   g_nt_query_section_func = reinterpret_cast<NtQuerySectionFunction>(
           GetNtDllExportByName("NtQuerySection"));
   g_nt_query_virtual_memory_func =
       reinterpret_cast<NtQueryVirtualMemoryFunction>(
           GetNtDllExportByName("NtQueryVirtualMemory"));
   g_nt_unmap_view_of_section_func =
       reinterpret_cast<NtUnmapViewOfSectionFunction>(
           GetNtDllExportByName("NtUnmapViewOfSection"));
@@ skipping 40 matching lines @@
     if (!module_name.empty() && DllMatch(module_name)) {
       DCHECK_NT(g_nt_unmap_view_of_section_func);
       g_nt_unmap_view_of_section_func(process, *base);
       ret = STATUS_UNSUCCESSFUL;
     }
 
   }
   return ret;
 }
 
+NTSTATUS WINAPI BlNtMapViewOfSection64(

[csharp, 2014/01/07 18:02:40]

I had thought about moving this into a 64-bit specific file, but it does so
little it seems best to keep it next to the 32-bit version (since it does all
the real work).

[robertshield, 2014/01/07 18:30:47]

SGTM. Add #ifdefs around it?

[csharp, 2014/01/07 20:43:07]

Done.

+    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