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// Copyright (c) 2010 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.
#ifndef SANDBOX_WOW_HELPER_SERVICE64_RESOLVER_H__
#define SANDBOX_WOW_HELPER_SERVICE64_RESOLVER_H__
#include "sandbox/src/nt_internals.h"
#include "sandbox/src/resolver.h"
namespace sandbox {
// This is the concrete resolver used to perform service-call type functions
// inside ntdll.dll (64-bit).
class Service64ResolverThunk : public ResolverThunk {
public:
// The service resolver needs a child process to write to.
explicit Service64ResolverThunk(HANDLE process)
: process_(process), ntdll_base_(NULL) {}
virtual ~Service64ResolverThunk() {}
// Implementation of Resolver::Setup.
virtual NTSTATUS 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);
// Implementation of Resolver::ResolveInterceptor.
virtual NTSTATUS ResolveInterceptor(const void* module,
const char* function_name,
const void** address);
// Implementation of Resolver::ResolveTarget.
virtual NTSTATUS ResolveTarget(const void* module,
const char* function_name,
void** address);
// Implementation of Resolver::GetThunkSize.
virtual size_t GetThunkSize() const;
protected:
// The unit test will use this member to allow local patch on a buffer.
HMODULE ntdll_base_;
// Handle of the child process.
HANDLE process_;
private:
// Returns true if the code pointer by target_ corresponds to the expected
// type of function. Saves that code on the first part of the thunk pointed
// by local_thunk (should be directly accessible from the parent).
virtual bool IsFunctionAService(void* local_thunk) const;
// Performs the actual patch of target_.
// local_thunk must be already fully initialized, and the first part must
// contain the original code. The real type of this buffer is ServiceFullThunk
// (yes, private). remote_thunk (real type ServiceFullThunk), must be
// allocated on the child, and will contain the thunk data, after this call.
// Returns the apropriate status code.
virtual NTSTATUS PerformPatch(void* local_thunk, void* remote_thunk);
DISALLOW_COPY_AND_ASSIGN(Service64ResolverThunk);
};
} // namespace sandbox
#endif // SANDBOX_WOW_HELPER_SERVICE64_RESOLVER_H__