From: Andreas Schwab <schwab@linux-m68k.org>
Date: Sun, 6 Sep 2009 19:20:26 +0000 (+0200)
Subject: Add ____longjmp_chk for m68k-linux
X-Git-Tag: upstream/2.30~10627^2~598
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f0e694490652893bd0957f8ded779133d883ebcd;p=external%2Fglibc.git

Add ____longjmp_chk for m68k-linux
---

diff --git a/ChangeLog.m68k b/ChangeLog.m68k
index 3afc3da..41ede01 100644
--- a/ChangeLog.m68k
+++ b/ChangeLog.m68k
@@ -1,3 +1,9 @@
+2009-09-06  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c: New file.
+
+	* sysdeps/m68k/__longjmp.c (__longjmp): Call CHECK_SP if defined.
+
 2009-05-16  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/m68k/Versions (libc): Add
diff --git a/sysdeps/m68k/__longjmp.c b/sysdeps/m68k/__longjmp.c
index 7d876a7..5ba2478 100644
--- a/sysdeps/m68k/__longjmp.c
+++ b/sysdeps/m68k/__longjmp.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1991, 92, 93, 94, 95, 97 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1997, 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
@@ -27,6 +28,10 @@ __longjmp (__jmp_buf env, int val)
   /* This restores the FP and SP that setjmp's caller had,
      and puts the return address into A0 and VAL into D0. */
 
+#ifdef CHECK_SP
+  CHECK_SP (env[0].__sp);
+#endif
+
 #if	defined(__HAVE_68881__) || defined(__HAVE_FPU__)
   /* Restore the floating-point registers.  */
   asm volatile("fmovem%.x %0, %/fp0-%/fp7" :
diff --git a/sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c b/sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c
new file mode 100644
index 0000000..8eaf591
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c
@@ -0,0 +1,39 @@
+/* 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>
+#include <signal.h>
+#include <sysdep.h>
+#define __longjmp ____longjmp_chk
+#define CHECK_SP(sp)							      \
+  do {									      \
+    register unsigned long this_sp asm ("sp");				      \
+    if ((unsigned long) (sp) < this_sp)					      \
+      {									      \
+	struct sigaltstack oss;						      \
+	INTERNAL_SYSCALL_DECL (err);					      \
+	int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);      \
+	if (!INTERNAL_SYSCALL_ERROR_P (result, err)			      \
+	    && ((oss.ss_flags & SS_ONSTACK) == 0			      \
+		|| ((unsigned long) oss.ss_sp + oss.ss_size		      \
+		    - (unsigned long) (sp)) < oss.ss_size))		      \
+	  __fortify_fail ("longjmp causes uninitialized stack frame");	      \
+      }									      \
+  } while (0)
+
+#include <__longjmp.c>