From 34edaed563e78081ce17ff1f682628c11d337bf2 Mon Sep 17 00:00:00 2001
From: Sandrine Bailleux <sandrine.bailleux@arm.com>
Date: Mon, 2 Dec 2013 15:45:07 +0000
Subject: [PATCH] BL2: Sanity check value in x0 in the entry point code

Change-Id: Icef68e314e6ba0f3694189b57f4b1dbbea5ba255
---
 bl2/aarch64/bl2_entrypoint.S | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/bl2/aarch64/bl2_entrypoint.S b/bl2/aarch64/bl2_entrypoint.S
index 75970f745..03d084807 100644
--- a/bl2/aarch64/bl2_entrypoint.S
+++ b/bl2/aarch64/bl2_entrypoint.S
@@ -77,6 +77,14 @@ bl2_entrypoint:; .type bl2_entrypoint, %function
 
 	isb
 
+	/* ---------------------------------------------
+	 * Check the opcodes out of paranoia.
+	 * ---------------------------------------------
+	 */
+	mov	x0, #RUN_IMAGE
+	cmp	x0, x20
+	b.ne	_panic
+
 	/* ---------------------------------------------
 	 * Zero out NOBITS sections. There are 2 of them:
 	 *   - the .bss section;