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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 10 Oct 2011 14:46:40 +0000 (UTC)
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Subject: svn commit: r226214 - stable/9/libexec/rtld-elf
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Author: kib
Date: Mon Oct 10 14:46:40 2011
New Revision: 226214
URL: http://svn.freebsd.org/changeset/base/226214

Log:
  MFC r226155:
  Setting up TLS block for the main thread must be done after the
  relocations are processed.
  
  Approved by:	re (bz)

Modified:
  stable/9/libexec/rtld-elf/rtld.c
Directory Properties:
  stable/9/libexec/rtld-elf/   (props changed)

Modified: stable/9/libexec/rtld-elf/rtld.c
==============================================================================
--- stable/9/libexec/rtld-elf/rtld.c	Mon Oct 10 14:35:26 2011	(r226213)
+++ stable/9/libexec/rtld-elf/rtld.c	Mon Oct 10 14:46:40 2011	(r226214)
@@ -495,8 +495,12 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_
        exit (0);
     }
 
-    /* setup TLS for main thread */
-    dbg("initializing initial thread local storage");
+    /*
+     * Processing tls relocations requires having the tls offsets
+     * initialized.  Prepare offsets before starting initial
+     * relocation processing.
+     */
+    dbg("initializing initial thread local storage offsets");
     STAILQ_FOREACH(entry, &list_main, link) {
 	/*
 	 * Allocate all the initial objects out of the static TLS
@@ -504,7 +508,6 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_
 	 */
 	allocate_tls_offset(entry->obj);
     }
-    allocate_initial_tls(obj_list);
 
     if (relocate_objects(obj_main,
       ld_bind_now != NULL && *ld_bind_now != '\0', &obj_rtld, NULL) == -1)
@@ -519,6 +522,14 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_
        exit (0);
     }
 
+    /*
+     * Setup TLS for main thread.  This must be done after the
+     * relocations are processed, since tls initialization section
+     * might be the subject for relocations.
+     */
+    dbg("initializing initial thread local storage");
+    allocate_initial_tls(obj_list);
+
     dbg("initializing key program variables");
     set_program_var("__progname", argv[0] != NULL ? basename(argv[0]) : "");
     set_program_var("environ", env);