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

src/trusted/service_runtime/sel_main.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 207 matching lines @@
   char                          *rest;
   struct redir                  *entry;
   struct redir                  *redir_queue;
   struct redir                  **redir_qend;
 
   struct NaClApp                state;
   char                          *nacl_file = 0;
   int                           main_thread_only = 1;
   int                           export_addr_to = -2;
   int                           dump_sock_addr_to = -1;
-  enum NaClAbiMismatchOption    abi_mismatch_option =
-                                    NACL_ABI_MISMATCH_OPTION_ABORT;
+  enum NaClAbiCheckOption       check_abi = NACL_ABI_CHECK_OPTION_CHECK;
 
   struct NaClApp                *nap;
 
   struct GioFile                gout;
   NaClErrorCode                 errcode;
   struct GioMemoryFileSnapshot  gf;
 
   int                           ret_code;
   /* NOTE: because of windows dll issue this cannot be moved to the top level */
   /* @IGNORE_LINES_FOR_CODE_HYGIENE[1] */
@@ skipping 88 matching lines @@
           return 1;
         }
         entry->next = NULL;
         entry->nacl_desc = strtol(optarg, &rest, 0);
         entry->tag = IMC_DESC;
         entry->u.handle = (NaClHandle) strtol(rest+1, (char **) 0, 0);
         *redir_qend = entry;
         redir_qend = &entry->next;
         break;
       case 'I':
-        abi_mismatch_option = NACL_ABI_MISMATCH_OPTION_IGNORE;
+        check_abi = NACL_ABI_CHECK_OPTION_SKIP;
         break;
      case 'l':
         log_file = optarg;
         break;
       case 'm':
         main_thread_only = 1;
         break;
       case 'M':
         main_thread_only = 0;
         break;
@@ skipping 94 matching lines @@
    */
   if (!NaClOsIsSupported()) {
     errcode = LOAD_UNSUPPORTED_OS_PLATFORM;
     nap->module_load_status = errcode;
     fprintf(stderr, "Error while loading \"%s\": %s\n",
             nacl_file,
             NaClErrorString(errcode));
   }
 
   if (LOAD_OK == errcode) {
-    errcode = NaClAppLoadFile((struct Gio *) &gf, nap, abi_mismatch_option);
+    errcode = NaClAppLoadFile((struct Gio *) &gf, nap, check_abi);
     if (LOAD_OK != errcode) {
       nap->module_load_status = errcode;
       fprintf(stderr, "Error while loading \"%s\": %s\n",
               nacl_file,
               NaClErrorString(errcode));
     }
   }
 
   if (LOAD_OK == errcode) {
     if (verbosity) {
@@ skipping 228 matching lines @@
     printf("Done.\n");
   }
   fflush(stdout);
 
   NaClAllModulesFini();
 
   WINDOWS_EXCEPTION_CATCH;
 
   _exit(ret_code);
 }