Fix the loading of the dynamic string table in a file without sections.

PR 23050
	* readelf.c (process_dynamic_section): Correct dynamic string
	table size calculation.

binutils/ChangeLog

@@ -1,3 +1,9 @@
+2018-04-12  Nick Clifton  <nickc@redhat.com>
+
+	PR 23050
+	* readelf.c (process_dynamic_section): Correct dynamic string
+	table size calculation.
+
 2018-04-11  Alan Modra  <amodra@gmail.com>
 
 	* ieee.c: Remove i960 support.

binutils/readelf.c

@@ -9639,7 +9639,7 @@ process_dynamic_section (Filedata * filedata)
 	  if (archive_file_offset != 0)
 	    str_tab_len = archive_file_size - offset;
 	  else
-	    str_tab_len = filedata->file_size;
+	    str_tab_len = filedata->file_size - offset;
 
 	  if (str_tab_len < 1)
 	    {