Add test for patching a system call instruction

library.h

 // 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 LIBRARY_H__
 #define LIBRARY_H__
 
 #include <elf.h>
 #include <functional>
 #include <map>
@@ skipping 101 matching lines @@
     *reinterpret_cast<T *>(
         reinterpret_cast<char *>(iter->second.start) + offset) = *value;
     return true;
   }
 
   bool parseElf();
   const Elf_Ehdr* getEhdr();
   const Elf_Shdr* getSection(const string& section);
   void makeWritable(bool state) const;
   void patchSystemCalls();
+  void patchSystemCallsInRange(char* start, char* stop,
+                               char** extraSpace, int* extraLength);
   bool isVDSO() const { return isVDSO_; }
 
  protected:
   bool parseSymbols();
 
  private:
   class GreaterThan : public std::binary_function<Elf_Addr, Elf_Addr, bool> {
     // We create the RangeMap with a GreaterThan rather than the default
     // comparator, as that allows us to use lower_bound() to find memory
     // mappings.
@@ skipping 35 matching lines @@
   RangeMap        memory_ranges_;
   bool            valid_;
   bool            isVDSO_;
   char*           asr_offset_;
   int             vsys_offset_;
   Elf_Ehdr        ehdr_;
   SectionTable    section_table_;
   SymbolTable     symbols_;
   char*           image_;
   size_t          image_size_;
-  static Maps*    maps_;
+  Maps*           maps_;
   static char*    __kernel_vsyscall;
   static char*    __kernel_sigreturn;
   static char*    __kernel_rt_sigreturn;
 };
 
 } // namespace
 
 #endif // LIBRARY_H__