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From: "hjl.tools at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/19178] ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA conflict
Date: Wed, 28 Oct 2015 13:41:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=19178

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Apparently, prelink does

 argv[i] = NULL;
  envp[0] = "LD_TRACE_LOADED_OBJECTS=1";
  envp[1] = "LD_BIND_NOW=1";
  p = alloca (sizeof "LD_TRACE_PRELINKING=" + strlen (info->ent->filename));
  strcpy (stpcpy (p, "LD_TRACE_PRELINKING="), info->ent->filename);
  envp[2] = p;
  envp[3] = NULL;

  ret = 2;
  f = execve_open (dl, (char * const *)argv, (char * const *)envp);
  if (f == NULL)
    {
      error (0, errno, "%s: Could not trace symbol resolving",
             info->ent->filename);
      return 0;
    }

to get relocation type from ld.so and has

#define RTYPE_CLASS_VALID       8
#define RTYPE_CLASS_PLT         (8|1)
#define RTYPE_CLASS_COPY        (8|2)
#define RTYPE_CLASS_TLS         (8|4)

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