first step in factoring out code dealing with elf into a separate library....

src/trusted/service_runtime/sel_ldr.c

 /*
  * Copyright 2008, Google 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.
@@ skipping 58 matching lines @@
   if (!DynArrayCtor(&nap->threads, 2)) {
     goto cleanup_none;
   }
   if (!DynArrayCtor(&nap->desc_tbl, 2)) {
     goto cleanup_threads;
   }
   if (!NaClVmmapCtor(&nap->mem_map)) {
     goto cleanup_desc_tbl;
   }
 
-  nap->phdrs = NULL;
   nap->service_port = NULL;
   nap->service_address = NULL;
   nap->secure_channel = NULL;
 
   if (!NaClMutexCtor(&nap->mu)) {
     goto cleanup_mem_map;
   }
   if (!NaClCondVarCtor(&nap->cv)) {
     goto cleanup_mu;
   }
@@ skipping 715 matching lines @@
     return NACL_SRPC_RESULT_NO_MEMORY;
   }
   UNREFERENCED_PARAMETER(out_args);
 
   if (!GioMemoryFileCtor(&gf, map_addr, rounded_size)) {
     return NACL_SRPC_RESULT_NO_MEMORY;
   }
 
   errcode = NaClAppLoadFile((struct Gio *) &gf,
                             nap,
-                            NACL_ABI_MISMATCH_OPTION_ABORT);
+                            NACL_ABI_CHECK_OPTION_CHECK);
   if (LOAD_OK != errcode) {
     nap->module_load_status = errcode;
     return NACL_SRPC_RESULT_APP_ERROR;
   }
 
   GioMemoryFileDtor((struct Gio *)&gf);
 
   /*
    * Finish setting up the NaCl App.  This includes dup'ing
    * descriptors 0-2 and making them available to the NaCl App.
@@ skipping 268 matching lines @@
 
   state.nap = nap;
   state.effp = (struct NaClDescEffector *) &eff;
   state.partial = 0;
   state.pbytes = 0;
 
   NaClDescEffectorCleanupCtor(&eff);
   NaClVmmapVisit(&nap->mem_map, NaClAppFreeWalker, &state);
   (*eff.base.vtbl->Dtor)(&eff.base);
 }