1    :  // Copyright 2012 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  //
  15    :  // Declares a BlockGraphTransform that trims the DOS header and ensures the NT
  16    :  // headers are sufficiently big to represent all sections in the block graph.
  17    :  // To be applied before layout so that the layout remains valid after
  18    :  // finalizing the headers.
  19    :  //
  20    :  // After this transform both the DOS header and the NT headers have been sized
  21    :  // appropriately for the resulting image. The DOS header has also been finalized
  22    :  // and will be valid after the transform. The NT headers are not necessarily
  23    :  // valid.
  24    :  
  25    :  #ifndef SYZYGY_PE_TRANSFORMS_PE_PREPARE_HEADERS_TRANSFORM_H_
  26    :  #define SYZYGY_PE_TRANSFORMS_PE_PREPARE_HEADERS_TRANSFORM_H_
  27    :  
  28    :  #include "syzygy/block_graph/transforms/named_transform.h"
  29    :  
  30  m :  namespace pe {
  31  m :  namespace transforms {
  32    :  
  33  m :  class PEPrepareHeadersTransform
  34  m :      : public block_graph::transforms::NamedBlockGraphTransformImpl<
  35  m :            PEPrepareHeadersTransform> {
  36  m :   public:
  37  m :    typedef block_graph::BlockGraph BlockGraph;
  38  m :    typedef block_graph::TransformPolicyInterface TransformPolicyInterface;
  39    :  
  40    :    // Applies this transform to the provided PE image block graph.
  41    :    //
  42    :    // @param policy The policy object restricting how the transform is applied.
  43    :    // @param block_graph The block graph to transform.
  44    :    // @param dos_header_block The DOS header block of the block graph.
  45    :    // @returns true on success, false otherwise.
  46  m :    virtual bool TransformBlockGraph(
  47  m :        const TransformPolicyInterface* policy,
  48  m :        BlockGraph* block_graph,
  49  m :        BlockGraph::Block* dos_header_block) override;
  50    :  
  51    :    // The name of this transform.
  52  m :    static const char kTransformName[];
  53  m :  };
  54    :  
  55  m :  }  // namespace transforms
  56  m :  }  // namespace pe
  57    :  
  58    :  #endif  // SYZYGY_PE_TRANSFORMS_PE_PREPARE_HEADERS_TRANSFORM_H_