build(corstone1000): rename diphda to corstone1000
diphda platform is now being renamed to corstone1000.
These changes are to replace all the instances and traces
of diphda corstone1000.
Change-Id: I330f3a112d232b99b4721b6bf0236253b068dbba
Signed-off-by: Arpita S.K <Arpita.S.K@arm.com>
Signed-off-by: Vishnu Banavath <vishnu.banavath@arm.com>
diff --git a/plat/arm/board/corstone1000/common/corstone1000_stack_protector.c b/plat/arm/board/corstone1000/common/corstone1000_stack_protector.c
new file mode 100644
index 0000000..393235e
--- /dev/null
+++ b/plat/arm/board/corstone1000/common/corstone1000_stack_protector.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <arch_helpers.h>
+#include <plat/common/platform.h>
+
+static uint32_t plat_generate_random_number(void)
+{
+ uintptr_t return_addr = (uintptr_t)__builtin_return_address(0U);
+ uintptr_t frame_addr = (uintptr_t)__builtin_frame_address(0U);
+ uint64_t cntpct = read_cntpct_el0();
+
+ /* Generate 32-bit pattern: saving the 2 least significant bytes
+ * in random_lo and random_hi
+ */
+ uint16_t random_lo = (uint16_t)(
+ (((uint64_t)return_addr) << 13) ^ frame_addr ^ cntpct
+ );
+
+ uint16_t random_hi = (uint16_t)(
+ (((uint64_t)frame_addr) << 15) ^ return_addr ^ cntpct
+ );
+
+ return (((uint32_t)random_hi) << 16) | random_lo;
+}
+
+u_register_t plat_get_stack_protector_canary(void)
+{
+ return plat_generate_random_number(); /* a 32-bit pattern returned */
+}