From a814a8d55429605fe6d7045045cd25b6bf624580 Mon Sep 17 00:00:00 2001
From: "initial.commit" <initial.commit@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Sat, 26 Jul 2008 22:41:28 +0000
Subject: Add sandbox to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13 0039d316-1c4b-4281-b951-d872f2087c98
---
 sandbox/src/eat_resolver.cc | 99 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 sandbox/src/eat_resolver.cc

(limited to 'sandbox/src/eat_resolver.cc')

diff --git a/sandbox/src/eat_resolver.cc b/sandbox/src/eat_resolver.cc
new file mode 100644
index 0000000..f3a8ca2
--- /dev/null
+++ b/sandbox/src/eat_resolver.cc
@@ -0,0 +1,99 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "sandbox/src/eat_resolver.h"
+
+#include "sandbox/src/pe_image.h"
+#include "sandbox/src/sandbox_nt_util.h"
+
+namespace sandbox {
+
+NTSTATUS EatResolverThunk::Setup(const void* target_module,
+                                 const void* interceptor_module,
+                                 const char* target_name,
+                                 const char* interceptor_name,
+                                 const void* interceptor_entry_point,
+                                 void* thunk_storage,
+                                 size_t storage_bytes,
+                                 size_t* storage_used) {
+  NTSTATUS ret = Init(target_module, interceptor_module, target_name,
+                      interceptor_name, interceptor_entry_point,
+                      thunk_storage, storage_bytes);
+  if (!NT_SUCCESS(ret))
+    return ret;
+
+  if (!eat_entry_)
+    return STATUS_INVALID_PARAMETER;
+
+  if (!SetInternalThunk(thunk_storage, storage_bytes, target_, interceptor_))
+    return STATUS_BUFFER_TOO_SMALL;
+
+  AutoProtectMemory memory;
+  memory.ChangeProtection(eat_entry_, sizeof(DWORD), PAGE_READWRITE);
+
+  // Perform the patch.
+#pragma warning(push)
+#pragma warning(disable: 4311)
+  // These casts generate warnings because they are 32 bit specific.
+  *eat_entry_ = reinterpret_cast<DWORD>(thunk_storage) -
+                reinterpret_cast<DWORD>(target_module);
+#pragma warning(pop)
+
+  if (NULL != storage_used)
+    *storage_used = GetInternalThunkSize();
+
+  return ret;
+}
+
+NTSTATUS EatResolverThunk::ResolveTarget(const void* module,
+                                         const char* function_name,
+                                         void** address) {
+  DCHECK_NT(address);
+  if (!module)
+    return STATUS_INVALID_PARAMETER;
+
+  PEImage pe(module);
+  if (!pe.VerifyMagic())
+    return STATUS_INVALID_IMAGE_FORMAT;
+
+  eat_entry_ = pe.GetExportEntry(function_name);
+
+  if (!eat_entry_)
+    return STATUS_PROCEDURE_NOT_FOUND;
+
+  *address = pe.RVAToAddr(*eat_entry_);
+
+  return STATUS_SUCCESS;
+}
+
+size_t EatResolverThunk::GetThunkSize() const {
+  return GetInternalThunkSize();
+}
+
+}  // namespace sandbox
-- 
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