samples: code_relocation: An example for code relocation feature.

This sample provides an example for using the code relocation
feature. This example will place text,data,bss from 3 files to
various parts in the SRAM. For this a custom linker file is used
which is derived from include/arch/arm/cortex_m/scripts/linker.ld.

Signed-off-by: Varun Sharma <varun.sharma@intel.com>
Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>

samples/application_development/code_relocation/linker_arm_sram2.ld

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2013-2014 Wind River Systems, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file
+ * @brief Linker command/script file
+ *
+ * Linker script for the Cortex-M platforms.
+ */
+
+#define _LINKER
+#define _ASMLANGUAGE
+
+#include <autoconf.h>
+#include <linker/sections.h>
+#include <generated_dts_board.h>
+
+#include <linker/linker-defs.h>
+#include <linker/linker-tool.h>
+
+/** enable CONFIG_SRAM2 or any other partition in soc Kconfig,
+ * this is just an example to show relocation of code/data/bss script
+ */
+#if defined CONFIG_ARM
+  #define CONFIG_SRAM2 1
+  #define _SRAM2_DATA_SECTION_NAME  .sram2_data
+  #define _SRAM2_BSS_SECTION_NAME   .sram2_bss
+  #define _SRAM2_TEXT_SECTION_NAME  .sram2_text
+#endif
+
+#define RAM_SIZE2 (CONFIG_SRAM_SIZE * 512)
+MEMORY
+    {
+#ifdef CONFIG_SRAM2
+    SRAM2                  (wx) : ORIGIN = (CONFIG_SRAM_BASE_ADDRESS + RAM_SIZE2), LENGTH = RAM_SIZE2
+#endif
+    }
+
+#include <arch/arm/cortex_m/scripts/linker.ld>