From: Ulrich Drepper <drepper@redhat.com>
Date: Wed, 29 Jul 2009 04:58:32 +0000 (-0700)
Subject: Fix bookkeeping of static TLS block for TLS_TCB_AT_TP architectures.
X-Git-Tag: upstream/2.30~13399
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9655389317c92e5935c47d90c0ba48ca54bd245e;p=external%2Fglibc.git

Fix bookkeeping of static TLS block for TLS_TCB_AT_TP architectures.
---

diff --git a/ChangeLog b/ChangeLog
index 60b7654..ff34e5f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2009-07-28  Ulrich Drepper  <drepper@redhat.com>
+
+	* csu/libc-tls.c (__libc_setup_tls) [TLS_TCB_AT_TP]: Don't add TCB
+	size to memsz.
+	(init_static_tls) [TLS_TCB_AT_TP]: Add it to GL(dl_tls_static_size)
+	here.
+	* elf/dl-reloc.c (_dl_try_allocate_static_tls): Compute freebytes in
+	two steps to catch bugs.
+
 2009-07-27  Ulrich Drepper  <drepper@redhat.com>
 
 	* sysdeps/x86_64/tst-xmmymm.sh: Refine testing.  The script now
diff --git a/csu/libc-tls.c b/csu/libc-tls.c
index 0d240cc..5a49942 100644
--- a/csu/libc-tls.c
+++ b/csu/libc-tls.c
@@ -1,5 +1,5 @@
 /* Initialization code for TLS in statically linked application.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -99,6 +99,9 @@ init_static_tls (size_t memsz, size_t align)
      surplus that permits dynamic loading of modules with IE-model TLS.  */
   GL(dl_tls_static_size) = roundup (memsz + GL(dl_tls_static_size),
 				    TLS_TCB_ALIGN);
+#if TLS_TCB_AT_TP
+  GL(dl_tls_static_size) += TLS_TCB_SIZE;
+#endif
   GL(dl_tls_static_used) = memsz;
   /* The alignment requirement for the static TLS block.  */
   GL(dl_tls_static_align) = align;
@@ -211,9 +214,7 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign)
 
   memsz = roundup (memsz, align ?: 1);
 
-#if TLS_TCB_AT_TP
-  memsz += tcbsize;
-#elif TLS_DTV_AT_TP
+#if TLS_DTV_AT_TP
   memsz += tcb_offset;
 #endif
 
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index 28f08de..680caad 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -61,7 +61,10 @@ _dl_try_allocate_static_tls (struct link_map *map)
   size_t n;
   size_t blsize;
 
-  freebytes = GL(dl_tls_static_size) - GL(dl_tls_static_used) - TLS_TCB_SIZE;
+  freebytes = GL(dl_tls_static_size) - GL(dl_tls_static_used);
+  if (freebytes < TLS_TCB_SIZE)
+    goto fail;
+  freebytes -= TLS_TCB_SIZE;
 
   blsize = map->l_tls_blocksize + map->l_tls_firstbyte_offset;
   if (freebytes < blsize)