See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=788113

diff -N -u -r ../PRoot-5.1.0/src/loader/assemble-arm64.h ./src/loader/assemble-arm64.h
--- ../PRoot-5.1.0/src/loader/assembly-arm64.h	1969-12-31 19:00:00.000000000 -0500
+++ ./src/loader/assembly-arm64.h	2016-01-08 20:12:46.494779723 -0500
@@ -0,0 +1,93 @@
+/* -*- c-set-style: "K&R"; c-basic-offset: 8 -*-
+ *
+ * This file is part of PRoot.
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA.
+ */
+
+#define BRANCH(stack_pointer, destination) do {			\
+	asm volatile (						\
+		"// Restore initial stack pointer.	\n\t"	\
+		"mov sp, %0				\n\t"	\
+		"					\n\t"	\
+		"// Clear rtld_fini.			\n\t"	\
+		"mov x0, #0				\n\t"	\
+		"					\n\t"	\
+		"// Start the program.			\n\t"	\
+		"br %1					\n"	\
+		: /* no output */				\
+		: "r" (stack_pointer), "r" (destination)	\
+		: "memory", "sp", "x0");			\
+	__builtin_unreachable();				\
+	} while (0)
+
+#define PREPARE_ARGS_1(arg1_)				\
+	register word_t arg1 asm("x0") = arg1_;		\
+
+#define PREPARE_ARGS_3(arg1_, arg2_, arg3_)		\
+	PREPARE_ARGS_1(arg1_)				\
+	register word_t arg2 asm("x1") = arg2_;		\
+	register word_t arg3 asm("x2") = arg3_;		\
+
+#define PREPARE_ARGS_4(arg1_, arg2_, arg3_, arg4_)	\
+	PREPARE_ARGS_3(arg1_, arg2_, arg3_)		\
+	register word_t arg4 asm("x3") = arg4_;
+
+#define PREPARE_ARGS_6(arg1_, arg2_, arg3_, arg4_, arg5_, arg6_)	\
+	PREPARE_ARGS_3(arg1_, arg2_, arg3_)				\
+	register word_t arg4 asm("x3") = arg4_;				\
+	register word_t arg5 asm("x4") = arg5_;				\
+	register word_t arg6 asm("x5") = arg6_;
+
+#define OUTPUT_CONTRAINTS_1			\
+	"r" (arg1)
+
+#define OUTPUT_CONTRAINTS_3			\
+	OUTPUT_CONTRAINTS_1,			\
+	"r" (arg2), "r" (arg3)
+
+#define OUTPUT_CONTRAINTS_4			\
+	OUTPUT_CONTRAINTS_3,			\
+	"r" (arg4)
+
+#define OUTPUT_CONTRAINTS_6				\
+	OUTPUT_CONTRAINTS_3,				\
+	"r" (arg4), "r" (arg5), "r" (arg6)
+
+#define SYSCALL(number_, nb_args, args...)			\
+	({							\
+		register word_t number asm("w8") = number_;	\
+		register word_t result asm("x0");		\
+		PREPARE_ARGS_##nb_args(args)			\
+			asm volatile (				\
+				"svc #0x00000000	\n\t"	\
+				: "=r" (result)			\
+				: "r" (number),			\
+				OUTPUT_CONTRAINTS_##nb_args	\
+				: "memory");			\
+			result;					\
+	})
+
+#define OPENAT	56
+#define CLOSE	57
+#define MMAP	222
+#define MMAP_OFFSET_SHIFT 0
+#define EXECVE	221
+#define EXIT	93
+#define PRCTL	167
+