Add arm-nacl port.roland/nacl-merge

1 files changed, 47 insertions, 0 deletions

diff --git a/sysdeps/arm/nacl/____longjmp_chk.S b/sysdeps/arm/nacl/____longjmp_chk.S
new file mode 100644
index 0000000000..f950f17d7b
--- /dev/null
+++ b/sysdeps/arm/nacl/____longjmp_chk.S
@@ -0,0 +1,47 @@
+/* longjmp that validates stack addresses.  ARM/NaCl version.
+   Copyright (C) 2015 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+	.section .rodata.str1.1,"aMS",%progbits,1
+	.type	longjmp_msg,%object
+longjmp_msg:
+	.string "longjmp causes uninitialized stack frame"
+	.size	longjmp_msg, .-longjmp_msg
+
+	.text
+
+/* We don't have sigaltstack and so any longjmp must be to an outer frame.  */
+.macro check_sp reg
+	cmp sp, \reg
+	bls .Lok
+#ifdef PIC
+	movw r0, #:lower16:longjmp_msg-(.LPIC0+8)
+	movt r0, #:upper16:longjmp_msg-(.LPIC0+8)
+.LPIC0:	add r0, r0, pc
+#else
+	movw r0, #:lower16:longjmp_msg
+	movt r0, #:upper16:longjmp_msg
+#endif
+	b HIDDEN_JUMPTARGET(__fortify_fail)
+.Lok:
+.endm
+
+#define CHECK_SP(reg)	check_sp reg
+#define __longjmp	____longjmp_chk
+#include <__longjmp.S>