text: // Copyright (c) 2013, Facebook, 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 Facebook 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 HOLDER 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.
  
  #ifndef fishhook_h
  #define fishhook_h
  
  #include <stddef.h>
  #include <stdint.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif //__cplusplus
  
  /*
   * A structure representing a particular intended rebinding from a symbol
   * name to its replacement
   */
  struct rcd_rebinding {
    const char *name;
    void *replacement;
    void **replaced;
  };
  
  /*
   * For each rebinding in rebindings, rebinds references to external, indirect
   * symbols with the specified name to instead point at replacement for each
   * image in the calling process as well as for all future images that are loaded
   * by the process. If rebind_functions is called more than once, the symbols to
   * rebind are added to the existing list of rebindings, and if a given symbol
   * is rebound more than once, the later rebinding will take precedence.
   */
  int rcd_rebind_symbols(struct rcd_rebinding rebindings[], size_t rebindings_nel);
  
  /*
   * Rebinds as above, but only in the specified image. The header should point
   * to the mach-o header, the slide should be the slide offset. Others as above.
   */
  int rcd_rebind_symbols_image(void *header,
                               intptr_t slide,
                               struct rcd_rebinding rebindings[],
                               size_t rebindings_nel);
  
  #ifdef __cplusplus
  }
  #endif //__cplusplus
  
  #endif //fishhook_h
  
  