From: Joseph Myers <joseph@codesourcery.com>
Date: Sat, 16 May 2009 22:24:56 +0000 (+0000)
Subject: ____longjmp_chk for MIPS.
X-Git-Tag: upstream/2.30~10627^2~614
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6a9f82ac93563fa55cb5aed4cf20fa67352899c9;p=external%2Fglibc.git

____longjmp_chk for MIPS.

	* sysdeps/mips/____longjmp_chk.c: New file.
	* sysdeps/mips/__longjmp.c: If CHECK_SP is defined, use it.  Don't
	undefine __longjmp.
	* sysdeps/mips64/__longjmp.c: Likewise.
---

diff --git a/ChangeLog.mips b/ChangeLog.mips
index 4039c01..9b0b7bd 100644
--- a/ChangeLog.mips
+++ b/ChangeLog.mips
@@ -1,5 +1,12 @@
 2009-05-16  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/mips/____longjmp_chk.c: New file.
+	* sysdeps/mips/__longjmp.c: If CHECK_SP is defined, use it.  Don't
+	undefine __longjmp.
+	* sysdeps/mips64/__longjmp.c: Likewise.
+
+2009-05-16  Joseph Myers  <joseph@codesourcery.com>
+
 	* sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate.c,
 	sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate64.c,
 	sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate.c,
diff --git a/sysdeps/mips/____longjmp_chk.c b/sysdeps/mips/____longjmp_chk.c
new file mode 100644
index 0000000..a46ed15
--- /dev/null
+++ b/sysdeps/mips/____longjmp_chk.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 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
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdio.h>
+#define __longjmp ____longjmp_chk
+#define CHECK_SP
+#include <__longjmp.c>
diff --git a/sysdeps/mips/__longjmp.c b/sysdeps/mips/__longjmp.c
index 386c056..340485d 100644
--- a/sysdeps/mips/__longjmp.c
+++ b/sysdeps/mips/__longjmp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992, 1995, 1997, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1992, 1995, 1997, 2000, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Brendan Kehoe (brendan@zen.org).
 
@@ -20,8 +20,6 @@
 #include <setjmp.h>
 #include <stdlib.h>
 
-#undef __longjmp
-
 #ifndef	__GNUC__
   #error This file uses GNU C extensions; you must compile with GCC.
 #endif
@@ -36,6 +34,11 @@ __longjmp (env, val_arg)
      Without this it saves $a1 in a register which gets clobbered
      along the way.  */
   register int val asm ("a1");
+#ifdef CHECK_SP
+  register long sp asm ("$29");
+  if ((long) (env[0].__sp) < sp)
+    __fortify_fail ("longjmp causes uninitialized stack frame");
+#endif
 
 #ifdef __mips_hard_float
   /* Pull back the floating point callee-saved registers.  */
diff --git a/sysdeps/mips/mips64/__longjmp.c b/sysdeps/mips/mips64/__longjmp.c
index 973b078..d7e36ff 100644
--- a/sysdeps/mips/mips64/__longjmp.c
+++ b/sysdeps/mips/mips64/__longjmp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992, 1995, 1997, 2000, 2003, 2004
+/* Copyright (C) 1992, 1995, 1997, 2000, 2003, 2004, 2009
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Brendan Kehoe (brendan@zen.org).
@@ -22,8 +22,6 @@
 #include <sgidefs.h>
 #include <stdlib.h>
 
-#undef __longjmp
-
 #ifndef	__GNUC__
   #error This file uses GNU C extensions; you must compile with GCC.
 #endif
@@ -38,6 +36,11 @@ __longjmp (env, val_arg)
      Without this it saves $a1 in a register which gets clobbered
      along the way.  */
   register int val asm ("a1");
+#ifdef CHECK_SP
+  register long long sp asm ("$29");
+  if ((long long) (env[0].__sp) < sp)
+    __fortify_fail ("longjmp causes uninitialized stack frame");
+#endif
 
 #ifdef __mips_hard_float
   /* Pull back the floating point callee-saved registers.  */