sandbox/win/wow_helper/service64_resolver.h

   1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SANDBOX_WOW_HELPER_SERVICE64_RESOLVER_H__
   6 #define SANDBOX_WOW_HELPER_SERVICE64_RESOLVER_H__
   7
   8 #include "sandbox/win/src/nt_internals.h"
   9 #include "sandbox/win/src/resolver.h"
  10
  11 namespace sandbox {
  12
  13 // This is the concrete resolver used to perform service-call type functions
  14 // inside ntdll.dll (64-bit).
  15 class Service64ResolverThunk : public ResolverThunk {
  16  public:
  17   // The service resolver needs a child process to write to.
  18   explicit Service64ResolverThunk(HANDLE process)
  19       : process_(process), ntdll_base_(NULL) {}
  20   virtual ~Service64ResolverThunk() {}
  21
  22   // Implementation of Resolver::Setup.
  23   virtual NTSTATUS Setup(const void* target_module,
  24                          const void* interceptor_module,
  25                          const char* target_name,
  26                          const char* interceptor_name,
  27                          const void* interceptor_entry_point,
  28                          void* thunk_storage,
  29                          size_t storage_bytes,
  30                          size_t* storage_used);
  31
  32   // Implementation of Resolver::ResolveInterceptor.
  33   virtual NTSTATUS ResolveInterceptor(const void* module,
  34                                       const char* function_name,
  35                                       const void** address);
  36
  37   // Implementation of Resolver::ResolveTarget.
  38   virtual NTSTATUS ResolveTarget(const void* module,
  39                                  const char* function_name,
  40                                  void** address);
  41
  42   // Implementation of Resolver::GetThunkSize.
  43   virtual size_t GetThunkSize() const;
  44
  45  protected:
  46   // The unit test will use this member to allow local patch on a buffer.
  47   HMODULE ntdll_base_;
  48
  49   // Handle of the child process.
  50   HANDLE process_;
  51
  52  private:
  53   // Returns true if the code pointer by target_ corresponds to the expected
  54   // type of function. Saves that code on the first part of the thunk pointed
  55   // by local_thunk (should be directly accessible from the parent).
  56   virtual bool IsFunctionAService(void* local_thunk) const;
  57
  58   // Performs the actual patch of target_.
  59   // local_thunk must be already fully initialized, and the first part must
  60   // contain the original code. The real type of this buffer is ServiceFullThunk
  61   // (yes, private). remote_thunk (real type ServiceFullThunk), must be
  62   // allocated on the child, and will contain the thunk data, after this call.
  63   // Returns the apropriate status code.
  64   virtual NTSTATUS PerformPatch(void* local_thunk, void* remote_thunk);
  65
  66   DISALLOW_COPY_AND_ASSIGN(Service64ResolverThunk);
  67 };
  68
  69 }  // namespace sandbox
  70
  71
  72 #endif  // SANDBOX_WOW_HELPER_SERVICE64_RESOLVER_H__