diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index f21984b75..b6906d9c8 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,10 @@
+2003-03-18  D.Venkatasubramanian  <dvenkat@noida.hcltech.com>
+
+	* libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline
+	support.
+	* configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__
+	flag to support simulator only extensions.
+
 2003-03-17  Bob Cassels  <bcassels@abinitio.com>
 
         * libc/string/wcschr.c: (wcschr): Look for character first, 
diff --git a/newlib/configure.host b/newlib/configure.host
index 07ef60795..40b72931e 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -503,6 +503,9 @@ case "${host}" in
   h8300*-*-*)
 	syscall_dir=syscalls	
 	newlib_cflags="${newlib_cflags} -DSMALL_DTOA -DSMALL_MEMORY"
+	# Simulator only extensions for H8300.
+	# Uncomment the next line to enable them.
+	# newlib_cflags="${newlib_cflags} -D__SIMULATOR__"
 	;;	
   h8500-*-*)
 	syscall_dir=syscalls	
diff --git a/newlib/libc/sys/h8300hms/crt0.S b/newlib/libc/sys/h8300hms/crt0.S
index 2845f4324..a2137ad3a 100644
--- a/newlib/libc/sys/h8300hms/crt0.S
+++ b/newlib/libc/sys/h8300hms/crt0.S
@@ -16,8 +16,14 @@ _start:
 #ifdef __ELF__
 	mov.l   #__fini,r0
 	jsr     @_atexit
+#ifdef __SIMULATOR__
+        jsr     @0xcc
+#endif
 	jsr     @__init
 #else
+#ifdef __SIMULATOR__
+        jsr     @0xcc
+#endif
 	jsr	@___main
 #endif
 	jsr	@_main
@@ -45,8 +51,14 @@ _start:
 #ifdef __ELF__
 	mov.l   #__fini,r0
 	jsr     @_atexit
+#ifdef __SIMULATOR__
+        jsr     @0xcc
+#endif
 	jsr     @__init
 #else
+#ifdef __SIMULATOR__
+        jsr     @0xcc
+#endif
 	jsr	@___main
 #endif
 	jsr	@_main
@@ -74,8 +86,14 @@ _start:
 #ifdef __ELF__
 	mov.l   #__fini,r0
 	jsr     @_atexit
+#ifdef __SIMULATOR__
+        jsr     @0xcc
+#endif
 	jsr     @__init
 #else
+#ifdef __SIMULATOR__
+        jsr     @0xcc
+#endif
 	jsr	@___main
 #endif
 	jsr	@_main