Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/lib/stack_protector/stack_protector.c b/lib/stack_protector/stack_protector.c
new file mode 100644
index 0000000..3ff74fc
--- /dev/null
+++ b/lib/stack_protector/stack_protector.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <common/debug.h>
+#include <plat/common/platform.h>
+
+/*
+ * Canary value used by the compiler runtime checks to detect stack corruption.
+ *
+ * Force the canary to be in .data to allow predictable memory layout relatively
+ * to the stacks.
+ */
+u_register_t  __attribute__((section(".data.stack_protector_canary")))
+	__stack_chk_guard = (u_register_t) 3288484550995823360ULL;
+
+/*
+ * Function called when the stack's canary check fails, which means the stack
+ * was corrupted. It must not return.
+ */
+void __dead2 __stack_chk_fail(void)
+{
+#if DEBUG
+	ERROR("Stack corruption detected\n");
+#endif
+	panic();
+}
+