Merge changes between r8452 and r8459 from /fsf/trunk.

git-svn-id: svn://svn.eglibc.org/trunk@8460 7b3dc134-2b1b-0410-93df-9e9f96275f8d

2 files changed, 55 insertions, 1 deletions

diff --git a/libc/sysdeps/i386/____longjmp_chk.S b/libc/sysdeps/i386/____longjmp_chk.S
new file mode 100644
index 000000000..6cd74968a
--- /dev/null
+++ b/libc/sysdeps/i386/____longjmp_chk.S
@@ -0,0 +1,45 @@
+/* Copyright (C) 2001,2004,2005,2006,2009 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
+   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.  */
+
+	.section .rodata.str1.1,"aMS",@progbits,1
+	.type	longjmp_msg,@object
+longjmp_msg:
+	.string "longjmp causes uninitialized stack frame"
+	.size	longjmp_msg, .-longjmp_msg
+
+
+#define __longjmp ____longjmp_chk
+
+#ifdef PIC
+# define CALL_FAIL	movl	%ebx, %ecx;				      \
+			cfi_register(%ebx,%ecx);			      \
+			LOAD_PIC_REG (bx);				      \
+			leal	longjmp_msg@GOTOFF(%ebx), %eax;		      \
+			call	__GI___fortify_fail@PLT
+#else
+# define CALL_FAIL	movl	$longjmp_msg, %eax;			      \
+			call	__fortify_fail
+#endif
+
+#define CHECK_ESP(reg) \
+	cmpl	reg, %esp;						      \
+	jbe	.Lok;							      \
+	CALL_FAIL;							      \
+.Lok:
+
+#include "__longjmp.S"
diff --git a/libc/sysdeps/i386/__longjmp.S b/libc/sysdeps/i386/__longjmp.S
index 559d56b25..15c9e55ec 100644
--- a/libc/sysdeps/i386/__longjmp.S
+++ b/libc/sysdeps/i386/__longjmp.S
@@ -1,5 +1,6 @@
 /* longjmp for i386.
-   Copyright (C) 1995-1998,2000,2002,2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1995-1998,2000,2002,2005,2006,2009
+   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
@@ -40,6 +41,9 @@ ENTRY (BP_SYM (__longjmp))
 	movl (JB_SP*4)(%eax), %ecx
 	PTR_DEMANGLE (%edx)
 	PTR_DEMANGLE (%ecx)
+# ifdef CHECK_ESP
+	CHECK_ESP (%ecx)
+# endif
 	cfi_def_cfa(%eax, 0)
 	cfi_register(%eip, %edx)
 	cfi_register(%esp, %ecx)
@@ -63,6 +67,11 @@ ENTRY (BP_SYM (__longjmp))
 	movl JBUF(%esp), %ecx	/* User's jmp_buf in %ecx.  */
 	CHECK_BOUNDS_BOTH_WIDE (%ecx, JBUF(%esp), $JB_SIZE)
 
+# ifdef CHECK_ESP
+	movl (JB_SP*4)(%ecx), %eax
+	CHECK_ESP (%eax)
+# endif
+
 	movl VAL(%esp), %eax	/* Second argument is return value.  */
 	/* Save the return address now.  */
 	movl (JB_PC*4)(%ecx), %edx