diff --git a/arch/x86/core/crt0.S b/arch/x86/core/crt0.S
index e0ac89457d9..c1f30588680 100644
--- a/arch/x86/core/crt0.S
+++ b/arch/x86/core/crt0.S
@@ -322,6 +322,14 @@ __csSet:
 	call	_x86_data_copy
 #endif /* CONFIG_APPLICATION_MEMORY */
 
+#ifdef CONFIG_APP_SHARED_MEM
+	movl	$_app_smem_start, %edi /* DATA in RAM (dest) */
+	movl	$_app_smem_rom_start, %esi /* DATA in ROM (src) */
+	movl	$_app_smem_num_words, %ecx /* Size of DATA in quad bytes */
+
+	call	_x86_data_copy
+#endif /* CONFIG_APP_SHARED_MEM */
+
 #endif /* CONFIG_XIP */
 
 	/*
diff --git a/include/arch/x86/linker.ld b/include/arch/x86/linker.ld
index 4984f05b115..f40435f95fa 100644
--- a/include/arch/x86/linker.ld
+++ b/include/arch/x86/linker.ld
@@ -214,6 +214,7 @@ SECTIONS
 	} GROUP_DATA_LINK_IN(RAMABLE_REGION, RAMABLE_REGION)
 
 	_app_smem_size = _app_smem_end - _app_smem_start;
+	_app_smem_num_words = _app_smem_size >> 2;
 	_app_smem_rom_start = LOADADDR(_APP_SMEM_SECTION_NAME);
 
 
diff --git a/include/linker/linker-defs.h b/include/linker/linker-defs.h
index 1dbb3ccb826..f56f0fa64cf 100644
--- a/include/linker/linker-defs.h
+++ b/include/linker/linker-defs.h
@@ -167,6 +167,7 @@ extern char _app_smem_start[];
 extern char _app_smem_end[];
 extern char _app_smem_size[];
 extern char _app_smem_rom_start[];
+extern char _app_smem_num_words[];
 
 #ifdef CONFIG_APPLICATION_MEMORY
 /* Memory owned by the application. Start and end will be aligned for memory