Add support for stack-protector

Add support for stack protector for UBOOT, SPL, and TPL
as well as new pytest for stackprotector

Signed-off-by: Joel Peshkin <joel.peshkin@broadcom.com>

Adjust UEFI build flags.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 20 insertions, 0 deletions

diff --git a/common/stackprot.c b/common/stackprot.c
new file mode 100644
index 0000000000..d5b7061665
--- /dev/null
+++ b/common/stackprot.c
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  Copyright 2021 Broadcom
+ */
+
+#include <common.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+unsigned long __stack_chk_guard = (unsigned long)(0xfeedf00ddeadbeef & ~0UL);
+
+void __stack_chk_fail(void)
+{
+	void *ra;
+
+	ra = __builtin_extract_return_addr(__builtin_return_address(0));
+	panic("Stack smashing detected in function:\n%p relocated from %p",
+	      ra, ra - gd->reloc_off);
+}