diff -uNpr utkernel_source.orig/config/sysdepend/app_mb9af312k/utk_config_depend.h utkernel_source/config/sysdepend/app_mb9af312k/utk_config_depend.h
--- utkernel_source.orig/config/sysdepend/app_mb9af312k/utk_config_depend.h	Fri May 10 10:31:26 2013
+++ utkernel_source/config/sysdepend/app_mb9af312k/utk_config_depend.h	Thu Aug 29 05:19:45 2013
@@ -46,7 +46,7 @@
 #define CFN_MAX_MPFID		8
 #define CFN_MAX_CYCID		4
 #define CFN_MAX_ALMID		8
-#define CFN_MAX_SSYID		4
+#define CFN_MAX_SSYID		0
 #define CFN_MAX_SSYPRI	16
 
 #define CFN_MAX_REGDEV		(8)
diff -uNpr utkernel_source.orig/etc/mkfuncfiles utkernel_source/etc/mkfuncfiles
--- utkernel_source.orig/etc/mkfuncfiles	Fri May 10 10:31:28 2013
+++ utkernel_source/etc/mkfuncfiles	Sat Aug 24 05:40:28 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/etc/mkiflib utkernel_source/etc/mkiflib
--- utkernel_source.orig/etc/mkiflib	Fri May 10 10:31:28 2013
+++ utkernel_source/etc/mkiflib	Sat Aug 24 05:40:08 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/etc/mktdsvc utkernel_source/etc/mktdsvc
--- utkernel_source.orig/etc/mktdsvc	Fri May 10 10:31:28 2013
+++ utkernel_source/etc/mktdsvc	Sat Aug 24 05:40:01 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/etc/mktksvc utkernel_source/etc/mktksvc
--- utkernel_source.orig/etc/mktksvc	Fri May 10 10:31:29 2013
+++ utkernel_source/etc/mktksvc	Sat Aug 24 05:39:43 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/etc/platform utkernel_source/etc/platform
--- utkernel_source.orig/etc/platform	Fri May 10 10:31:29 2013
+++ utkernel_source/etc/platform	Sat Aug 24 05:41:49 2013
@@ -20,6 +20,7 @@ case $os in
   SunOS)	platform=$os-`uname -p` ;;
   Linux)	platform=$os-`uname -m` ;;
   FreeBSD)	platform=$os-`uname -p` ;;
+  OpenBSD)	platform=$os-`uname -m` ;;
   CYGWIN*)	platform="Cygwin-`uname -m`" ;;
   *)		platform=unknown ;;
 esac
diff -uNpr utkernel_source.orig/etc/sysdepend/app_mb9af312k/makerules.sysdepend utkernel_source/etc/sysdepend/app_mb9af312k/makerules.sysdepend
--- utkernel_source.orig/etc/sysdepend/app_mb9af312k/makerules.sysdepend	Fri May 10 10:31:30 2013
+++ utkernel_source/etc/sysdepend/app_mb9af312k/makerules.sysdepend	Thu Aug 29 07:31:48 2013
@@ -56,6 +56,9 @@ endif
 ifneq ($(filter Linux-%, $(CROSS_ARCH)), )
   PATH := $(PATH):/usr/local/bin:/bin:/usr/bin
 endif
+ifneq ($(filter OpenBSD-%, $(CROSS_ARCH)), )
+  PATH := $(PATH):/usr/local/bin:/bin:/usr/bin
+endif
 ifneq ($(filter Cygwin-%, $(CROSS_ARCH)), )
   PATH := $(PATH):/usr/local/bin:/bin:/usr/bin
 endif
@@ -66,8 +69,8 @@ endif
 TARGET_ARCH =
 
 # target type
-_CPUTYPE_FLAGS    = -mcpu=cortex-m3
-_CPUTYPE_FLAGS_AS = -mcpu=cortex-m3
+_CPUTYPE_FLAGS    = -march=armv6-m
+_CPUTYPE_FLAGS_AS = -march=armv6-m
 _TE_SYSTEM_NAME_ = _APP_MB9AF312K_
 
 # code set
@@ -80,7 +83,7 @@ ASFLAGS +=
 LDFLAGS +=
 
 ### C  ###
-CC := $(GNUARM_2)/bin/gcc4arm
+CC := $(GNUARM_2)/bin/$(TOOL_PREFIX)gcc
 OUTPUT_OPTION = -o $@
 ifeq ($(mode), debug)
   CFLAGS += -g
@@ -117,7 +120,7 @@ LINK.c = $(CC) $(TARGET_ARCH) $(CFLAGS) $(CPPFLAGS) $(
 	$(CC) $(TARGET_ARCH) $(CFLAGS) $(CPPFLAGS) -E $< $(OUTPUT_OPTION)
 
 ### C++ ###
-CXX := $(GNUARM_2)/bin/gcc4arm
+CXX := $(GNUARM_2)/bin/$(TOOL_PREFIX)gcc
 CXXFLAGS = $(CFLAGS)
 
 COMPILE.cc = $(CXX) $(TARGET_ARCH) $(CXXFLAGS) $(CPPFLAGS) -c
@@ -133,7 +136,7 @@ LINK.cc = $(CXX) $(TARGET_ARCH) $(CXXFLAGS) $(CPPFLAGS
 	$(CXX) $(TARGET_ARCH) $(CXXFLAGS) $(CPPFLAGS) -E $< $(OUTPUT_OPTION)
 
 ### asm ###
-AS = $(GNUARM_2)/bin/as
+AS = $(GNUARM_2)/bin/$(TOOL_PREFIX)as
 ifeq ($(mode), debug)
   ASFLAGS += -g
 else
@@ -156,7 +159,7 @@ COMPILE.s = $(AS) $(ASFLAGS.s)
 	$(CC) $(TARGET_ARCH) $(ASFLAGS) $(CPPFLAGS) -E $< $(OUTPUT_OPTION)
 
 ### linker ###
-LD = $(GNUARM_2)/bin/ld
+LD = $(GNUARM_2)/bin/$(TOOL_PREFIX)ld
 ifeq ($(mode), debug)
   LDFLAGS += $(LIBDIR:%=-L%)
 else
@@ -204,15 +207,15 @@ LOCATE.o = $(CC) $(TARGET_ARCH) $(LDFLAGS) -nostdlib $
 	$(RM) _$@
 
 ### library ###
-AR = $(GNUARM_2)/bin/ar
+AR = $(GNUARM_2)/bin/$(TOOL_PREFIX)ar
 ARFLAGS = rv
-RANLIB = $(GNUARM_2)/bin/ranlib
+RANLIB = $(GNUARM_2)/bin/$(TOOL_PREFIX)ranlib
 
 (%): %
 	$(AR) $(ARFLAGS) $@ $%
 
 ### create name list ###
-NM = $(GNUARM_2)/bin/nm
+NM = $(GNUARM_2)/bin/$(TOOL_PREFIX)nm
 NMFLAGS = -n
 
 %.map: %
@@ -252,11 +255,10 @@ DATABOX = $(DB) $(DBFLAGS)
 
 ### other ###
 ifndef CPP
-  CPP = $(GNU_BD)/bin/arm_2-unknown-tkernel-cpp
+  CPP = $(GNUARM_2)/bin/$(TOOL_PREFIX)cpp
 endif
-STRIP = $(GNUARM_2)/bin/strip --strip-unneeded
+STRIP = $(GNUARM_2)/bin/$(TOOL_PREFIX)strip --strip-unneeded
 
-#OBJCOPY = $(GNU_BD)/bin/arm_2-unknown-tkernel-objcopy
-OBJCOPY = $(GNU_BD)/bin/arm-none-eabi-objcopy
+OBJCOPY = $(GNUARM_2)/bin/$(TOOL_PREFIX)objcopy
 OUTPUT_SREC = -O srec --srec-forceS3 --srec-len 32
 OUTPUT_BIN = -O binary
diff -uNpr utkernel_source.orig/kernel/sysdepend/cpu/mb9af312k/cpu_support.S utkernel_source/kernel/sysdepend/cpu/mb9af312k/cpu_support.S
--- utkernel_source.orig/kernel/sysdepend/cpu/mb9af312k/cpu_support.S	Fri May 10 10:31:53 2013
+++ utkernel_source/kernel/sysdepend/cpu/mb9af312k/cpu_support.S	Thu Aug 29 07:33:03 2013
@@ -33,8 +33,8 @@
 #include <tk/asm.h>
 #include <sys/sysinfo.h>
 
-#if USE_TRAP | (USE_DBGSPT & USE_HOOK_TRACE)
-#include "isysconf.h"
+#if USE_TRAP | USE_DBGSPT | USE_HOOK_TRACE
+#error ouch!
 #endif
 
 #include "tkdev_conf.h"
@@ -75,24 +75,21 @@
 	.globl Csym(knl_dispatch_to_schedtsk)
 Csym(knl_dispatch_to_schedtsk):
 	/* Interrupt is disabled(CPSR.I=1 F=1), during SVC mode */
-	ldr	sp, =TMP_STACK_TOP		/* Set temporal stack */
+	ldr	r0, =TMP_STACK_TOP		/* Set temporal stack */
+	mov	sp, r0
 
-	ldr	ip, =Csym(knl_dispatch_disabled)
+	ldr	r3, =Csym(knl_dispatch_disabled)
 	ldr	r0, =1
-	str	r0, [ip]			/* Dispatch disable */
+	str	r0, [r3]			/* Dispatch disable */
 
 	ldr	r4, =Csym(knl_ctxtsk)		/* R4 = &ctxtsk */
 	ldr	r0, =0
-#if USE_DBGSPT
-	ldr	r8, [r4]
-#endif
-
 	str	r0, [r4]			/* ctxtsk = NULL */
 
 	/* Clear the pending state from the PendSV exception */
 	ldr	r0, =SCB_ICSR
-	ldr	ip, =ICSR_PENDSVCLR
-	str	ip, [r0]
+	ldr	r3, =ICSR_PENDSVCLR
+	str	r3, [r0]
 
 	b	l_dispatch0
 
@@ -101,35 +98,32 @@ Csym(knl_dispatch_to_schedtsk):
 	.globl Csym(knl_dispatch_entry)
 Csym(knl_dispatch_entry):
 _ret_int_dispatch:
-	stmfd	sp!, {lr}			/* Context save (lr) */
-
 	ldr	r0, =Csym(knl_dispatch_disabled)
 	ldr	r1, =1
 	str	r1, [r0]			/* Dispatch disable */
 
-	ldr	lr, =Csym(knl_taskmode)
-	ldr	lr, [lr]
-	stmfd	sp!, {r4-r11, lr}
+	ldr	r0, =Csym(knl_taskmode)
+	ldr	r0, [r0]
+	push	{r0, lr}			/* Context save (lr) */
 
+	mov	r0, r8
+	mov	r1, r9
+	mov	r2, r10
+	mov	r3, r11
+	push	{r0-r7}
+
 	/* Context save */
 	ldr	r4, =Csym(knl_ctxtsk)		/* R4 = &ctxtsk */
 	ldr	r0, =0
-	ldr	r8, [r4]
-	cmp 	r8, #0
-	it 	ne
-	strne	sp, [r8, #TCB_tskctxb + CTXB_ssp] 	/* Save 'ssp' to TCB */
+	ldr	r7, [r4]
+	cmp 	r7, #0
+	beq	0f
+	mov	r1, sp
+	str	r1, [r7, #TCB_tskctxb + CTXB_ssp] 	/* Save 'ssp' to TCB */
+0:
 	str	r0, [r4]			/* ctxtsk = NULL */
 
 l_dispatch0:
-
-#if USE_DBGSPT & USE_HOOK_TRACE
-	ldr	ip, =hook_stop_jmp		/* Hook processing */
-	ldr	pc, [ip]
-
-	.thumb_func
-ret_hook_stop:
-#endif
-
 	ldr	r5, =Csym(knl_schedtsk)		/* R5 = &schedtsk */
 	ldr	r6, =Csym(knl_lowpow_discnt)	/* R6 = &lowpow_discnt */
 
@@ -137,42 +131,41 @@ l_dispatch1:
   	ldr	r0, =MAX_EXTINT_PRI
 	msr	basepri, r0
 
-	ldr	r8, [r5]			/* R8 = schedtsk */
-	cmp	r8, #0				/* Is there 'schedtsk'? */
+	ldr	r7, [r5]			/* R7 = schedtsk */
+	cmp	r7, #0				/* Is there 'schedtsk'? */
 	bne	l_dispatch2
 
 	/* Because there is no task that should be executed, move to the power-saving mode */
-	ldr	ip, [r6]			/* Is 'low_pow' disabled? */
-	cmp	ip, #0
-	it	eq
-	bleq	Csym(knl_low_pow)		/* call low_pow() */
-
+	ldr	r3, [r6]			/* Is 'low_pow' disabled? */
+	cmp	r3, #0
+	bne	1f
+	bl	Csym(knl_low_pow)		/* call low_pow() */
+1:
   	ldr	r0, =0
 	msr	basepri, r0
 
 	b	l_dispatch1
 
 l_dispatch2:					/* Switch to 'schedtsk' */
-	str	r8, [r4]			/* ctxtsk = schedtsk */
-	ldr	sp, [r8, #TCB_tskctxb + CTXB_ssp]	/* Restore 'ssp' from TCB */
+	str	r7, [r4]			/* ctxtsk = schedtsk */
+	ldr	r1, [r7, #TCB_tskctxb + CTXB_ssp]	/* Restore 'ssp' from TCB */
+	mov	sp, r1
 
-#if USE_DBGSPT & USE_HOOK_TRACE
-	ldr	ip, =hook_exec_jmp		/* Hook processing */
-	ldr	pc, [ip]
-
-	.thumb_func
-ret_hook_exec:
-#endif
-
 	ldr	r0, =Csym(knl_dispatch_disabled)
 	ldr	r1, =0
 	str	r1, [r0]			/* Dispatch enable */
 
-	ldmfd	sp!, {r4-r11, lr}
+	pop	{r0-r7}
+	mov	r8, r0
+	mov	r9, r1
+	mov	r10, r2
+	mov	r11, r3
+
+	pop	{r0, r3}
 	ldr	r1, =Csym(knl_taskmode)
-	str	lr, [r1]
+	str	r0, [r1]
 
-	ldmfd	sp!, {lr}			/* R14_svc restore */
+	mov	lr, r3				/* R14_svc restore */
 
   	ldr	r0, =0
 	msr	basepri, r0
@@ -181,79 +174,6 @@ ret_hook_exec:
 
 	EXC_RETURN
 
-
-#if USE_DBGSPT & USE_HOOK_TRACE
-/*
- * Task dispatcher hook routine call
- *	void stop( ID tskid, INT lsid, UINT tskstat )
- *	void exec( ID tskid, INT lsid )
- */
-	.text
-	.align 2
-	.thumb_func
-hook_stop:
-	cmp	r8, #0			/* r8 = ctxtsk */
-	beq	l_notask
-
-	ldrb	r2, [r8, #TCB_state]	/* tskstat */
-	mov	r2, r2, lsl #1
-	ldr	r0, [r8, #TCB_tskid]	/* tskid */
-
-	ldr	ip, =Csym(knl_hook_stopfn)
-	ldr	ip, [ip]
-	blx	ip			/* call stop(tskid, lsid, tskstat) */
-
-l_notask:
-	b	ret_hook_stop
-
-	.thumb_func
-hook_exec:
-					/* r8 = ctxtsk */
-	ldr	r0, [r8, #TCB_tskid]	/* tskid */
-
-	ldr	ip, =Csym(knl_hook_execfn)
-	ldr	ip, [ip]
-	blx	ip			/* call exec(tskid, lsid) */
-
-	b	ret_hook_exec
-
-/*
- * Set/Free task dispatcher hook routine
- */
-	.text
-	.align 2
-	.thumb
-	.thumb_func
-	.global Csym(knl_hook_dsp)
-Csym(knl_hook_dsp):
-	ldr	r0, =hook_exec_jmp
-	ldr	r1, =hook_stop_jmp
-	ldr	r2, =hook_exec
-	ldr	r3, =hook_stop
-	str	r2, [r0]
-	str	r3, [r1]
-	bx	lr
-
-	.thumb
-	.thumb_func
-	.global Csym(knl_unhook_dsp)
-Csym(knl_unhook_dsp):
-	ldr	r0, =hook_exec_jmp
-	ldr	r1, =hook_stop_jmp
-	ldr	r2, =ret_hook_exec
-	ldr	r3, =ret_hook_stop
-	str	r2, [r0]
-	str	r3, [r1]
-	bx	lr
-
-	.data
-	.align 2
-hook_exec_jmp:	.long	ret_hook_exec
-hook_stop_jmp:	.long	ret_hook_stop
-
-#endif /* USE_DBGSPT & USE_HOOK_TRACE */
-
-
 #if USE_HLL_INTHDR
 /* ------------------------------------------------------------------------ */
 /*
@@ -270,112 +190,33 @@ hook_stop_jmp:	.long	ret_hook_stop
 	.thumb_func
 	.globl	Csym(knl_inthdr_startup)
 Csym(knl_inthdr_startup):
-	push	{lr}			/* push EXC_RETURN value to stack */
+	push	{r2, lr}		/* push EXC_RETURN value to stack */
 
-	ldr	ip, =Csym(knl_taskindp)	/* Task independent part */
-	ldr	r1, [ip]
-	add	r1, r1, #1
-	str	r1, [ip]
+	ldr	r3, =Csym(knl_taskindp)	/* Task independent part */
+	ldr	r1, [r3]
+	adds	r1, r1, #1
+	str	r1, [r3]
 
 	mrs	r0, ipsr
-	sub	r0, r0, #16		/* interrupt number (dintno) */
+	subs	r0, r0, #16		/* interrupt number (dintno) */
 
-#if USE_DBGSPT & USE_HOOK_TRACE
-	ldr	ip, =hook_ienter_jmp
-	ldr	pc, [ip]
+	ldr	r3, =Csym(knl_hll_inthdr)
+	lsls	r1, r0, #2
+	ldr	r3, [r3, r1]
+	blx	r3			/* call hll_inthdr[n](dintno) */
 
-	.thumb_func
-ret_hook_ienter:
-#endif
+	ldr	r3, =Csym(knl_taskindp)
+	ldr	r2, [r3]
+	subs	r2, r1, #1
+	str	r2, [r3]
 
-	ldr	ip, =Csym(knl_hll_inthdr)
-	lsl	r1, r0, #2
-	ldr	ip, [ip, r1]
-	blx	ip			/* call hll_inthdr[n](dintno) */
+	pop	{r2, r3}		/* pop EXC_RETURN value from stack */
+	mov	lr, r3
 
-#if USE_DBGSPT & USE_HOOK_TRACE
-	ldr	ip, =hook_ileave_jmp
-	ldr	pc, [ip]
-
-	.thumb_func
-ret_hook_ileave:
-#endif
-
-	ldr	ip, =Csym(knl_taskindp)
-	ldr	r2, [ip]
-	sub	r2, r2, #1
-	str	r2, [ip]
-
-	pop	{lr}			/* pop EXC_RETURN value from stack */
-
 	EXC_RETURN
 
-
-#if USE_DBGSPT & USE_HOOK_TRACE
-/*
- * Interrupt handler hook routine call
- */
-	.text
-	.align 2
-	.thumb_func
-hook_ienter:
-	stmfd	sp!, {r0, r1}		/* Register save */
-	stmfd	sp!, {r3}
-
-	ldr	ip, =Csym(knl_hook_ienterfn)
-	ldr	ip, [ip]
-	blx	ip			/* call enter(dintno, sp) */
-
-	ldmfd	sp!, {r3}		/* Register restore */
-	ldmfd	sp, {r0, r1}		/* Leave 'dintno,' 'sp' on stack */
-	b	ret_hook_ienter
-
-	.thumb_func
-hook_ileave:
-	ldmfd	sp!, {r0, r1}		/* Restore 'dintno,' 'sp' */
-
-	ldr	ip, =Csym(knl_hook_ileavefn)
-	ldr	ip, [ip]
-	blx	ip			/* call leave(dintno, info) */
-
-	b	ret_hook_ileave
-
-/*
- * Set/Free interrupt handler hook routine
- */
-	.thumb
-	.thumb_func
-	.globl Csym(knl_hook_int)
-Csym(knl_hook_int):
-	ldr	r0, =hook_ienter_jmp
-	ldr	r1, =hook_ileave_jmp
-	ldr	r2, =hook_ienter
-	ldr	r3, =hook_ileave
-	str	r2, [r0]
-	str	r3, [r1]
-	bx	lr
-
-	.thumb
-	.thumb_func
-	.globl Csym(knl_unhook_int)
-Csym(knl_unhook_int):
-	ldr	r0, =hook_ienter_jmp
-	ldr	r1, =hook_ileave_jmp
-	ldr	r2, =ret_hook_ienter
-	ldr	r3, =ret_hook_ileave
-	str	r2, [r0]
-	str	r3, [r1]
-	bx	lr
-
-	.data
-	.align 2
-hook_ienter_jmp:		.long	ret_hook_ienter
-hook_ileave_jmp:		.long	ret_hook_ileave
-
-#endif /* USE_DBGSPT & USE_HOOK_TRACE */
 #endif /* USE_HLL_INTHDR */
 
-
 /*
  * tk_ret_int_impl()
  */
@@ -388,368 +229,7 @@ Csym(tk_ret_int_impl):
 	EXC_RETURN
 
 /* ------------------------------------------------------------------------ */
-
-#if USE_TRAP | USE_DBGSPT | (CFN_MAX_SSYID > 0)
 /*
- * Unsupported system call
- */
-	.text
-	.align 2
-	.thumb
-	.thumb_func
-	.globl Csym(knl_no_support)
-Csym(knl_no_support):
-	ldr	r0, =E_RSFN
-	bx	lr
-
-/*
- * System call entry table
- */
-#if USE_TRAP | (USE_DBGSPT & USE_HOOK_TRACE)
-	.text
-	.align	2
-_svctbl:
-	.int	Csym(knl_no_support)
-#define	tk_ret_int_impl	knl_no_support
-#include <sys/svc/tksvctbl.h>
-#undef	tk_ret_int_impl
-#endif /* USE_TRAP */
-
-/*
- * System call entry
- *	Do not need to save the temporary register.
- *	The compiler saves the permanent register.
- *
- *		+---------------+
- *		| xPSR		|
- *		| Return Address|
- *		| lr		|
- *		| ip		|
- *		| r3		| Function code
- *		| r2		|
- *		| r1		| Addressof(svc #0) + 1
- *		| r0		|
- *	sp ->	+---------------+
- */
-	.text
-	.align 2
-	.thumb
-	.thumb_func
-	.globl Csym(knl_svcall_entry)
-Csym(knl_svcall_entry):
-	tst	lr, #0x4		/* Test EXC_RETURN number in LR bit 2 */
-	ite	eq
-	mrseq	r1, msp			/* Main stack */
-	mrsne	r1, psp			/* Process stack */
-
-	/* Get Parameter of SVC instruction */
-	ldr	r2, [r1, #24]
-	ldrb	r1, [r2, #-2]
-
-	ldr	r0, svcall_exc_ret
-
-	cmp	r1, #SVC_SYSCALL
-	it	eq
-	ldreq	r0, =knl_call_entry
-
-	cmp	r1, #SVC_EXTENDED_SVC
-	it	eq
-	ldreq	r0, =Csym(knl_call_entry)
-
-#if USE_DBGSPT & (USE_TRAP | USE_HOOK_TRACE)
-	cmp	r1, #SVC_DEBUG_SUPPORT
-	it	eq
-	ldreq	r0, =Csym(knl_call_dbgspt)
-#endif
-
-	ldr	r2, =svcall_exc_ret
-	cmp	r0, r2
-	ittt	eq
-	ldreq	r2, =E_RSFN
-	streq	r2, [sp]
-	beq	svcall_exc_ret
-
-	ldr	r1, [sp, #24]
-	orr	r1, r1, #0x00000001
-	str	r1, [sp, #20]
-
-	str	r0, [sp, #24]
-
-svcall_exc_ret:
-	EXC_RETURN
-
-	.thumb
-	.thumb_func
-	.globl Csym(knl_call_entry)
-Csym(knl_call_entry):
-
-	stmfd	sp!, {r0-r7, ip, lr}
-
-	/* Load func code */
-	add	r5, sp, #8*4
-
-	ldr	ip, =Csym(knl_taskmode)	/* Task mode flag update */
-	ldr	r7, [ip]
-	stmfd	sp!, {r7}		/* taskmode save */
-	mov	r6, sp			/* Save stack pointer */
-	mov	lr, r7, lsl #16
-	str	lr, [ip]
-
-#if USE_DBGSPT & USE_HOOK_TRACE
-	ldr	ip, =hook_enter_jmp	/* Hook processing */
-	ldr	pc, [ip]
-
-	.thumb_func
-ret_hook_enter:
-#endif
-
-	ldr	ip, [r5]
-	cmp	ip, #0			/*	< 0:  System call */
-	bge	l_esvc_function		/*	>= 0: Extended SVC */
-
-#if USE_TRAP | (USE_DBGSPT & USE_HOOK_TRACE)
-
-	/* micro T-Kernel System Call */
-	mov	r2, ip, asr #16		/* r2 = Function number */
-	ldr	r1, =N_TFN + 0xffff8000
-	cmp	r2, r1
-	bgt	l_illegal_svc
-
-	mov	ip, ip, lsr #8
-	and	ip, ip, #0xff		/* ip = Number of arguments */
-	cmp	ip, #5
-	bne	l_nocopy
-	ldr	ip, [r4]		/* Copy fifth argument */
-	stmfd	sp!, {ip}
-l_nocopy:
-
-	ldr	ip, =_svctbl - (0xffff8000 << 2)
-	add	r4, ip, r2, lsl #2
-	add	ip, r6, #4
-	ldmfd	ip, {r0, r1, r2, r3}
-	ldr	r4, [r4]		/* r4 = system call address */
-	blx	r4
-#else
-	b	l_illegal_svc
-#endif
-
-l_retsvc:
-
-#if USE_DBGSPT & USE_HOOK_TRACE
-	ldr	ip, =hook_leave_jmp	/* Hook processing */
-	ldr	pc, [ip]
-
-	.thumb_func
-ret_hook_leave:
-#endif
-
-	mov	sp, r6
-	ldmfd	sp!, {ip}		/* Restore register for work */
-
-	ldr	r4, =Csym(knl_taskmode)	/* Task mode restore */
-	str	ip, [r4]
-
-	add	sp, sp, #16
-	ldmfd	sp!, {r4-r7, ip, lr}
-
-	EXC_RETURN
-
-l_illegal_svc:
-	ldr	r0, =E_RSFN
-	b	l_retsvc
-
-l_esvc_function:
-
-#if CFN_MAX_SSYID > 0
-	/* Extended SVC */
-	ldr	r1, [r5]		/* r1 = Function code */
-	bl	Csym(knl_svc_ientry)	/* svc_ientry(pk_para, fncd) */
-	b	l_retsvc
-#else
-	ldr	r0, =E_SYS
-	b	l_retsvc
-#endif /* CFN_MAX_SSYID > 0 */
-
-
-#if USE_DBGSPT & USE_HOOK_TRACE
-/*
- * System call/Extended SVC hook routine call
- *	VP enter( FN fncd, TD_CALINF *calinf, ... )
- *	void leave( FN fncd, INT ret, VP exinf )
- *
- *	typedef struct td_calinf {
- *		VP	ssp;	System stack pointer
- *		VP	r11;	Flame pointer when calling
- *	} TD_CALINF;
- */
-	.text
-	.align 2
-
-	.thumb
-	.thumb_func
-hook_enter:
-	stmfd	sp!, {r0-r3, r8-r10}	/* Save argument and register for work */
-	mov	r8, sp			/* r8 = Keep stack position */
-
-	mov	ip, r5			/* Create TD_CALINF */
-	stmfd	sp!, {r5, ip}
-	mov	r9, sp			/* r9 = &TD_CALINF */
-
-	ldr	ip, [r5]		/* ip = Function code */
-	cmp	ip, #0			/*	< 0: System call */
-	bge	l_hooksvc		/*	>= 0: Extended SVC */
-
-	mov	ip, ip, lsr #8
-	and	ip, ip, #0xff		/* Number of arguments */
-
-	cmp	ip, #5
-	itt	ge
-	ldrge	r10, [r4]
-	stmfdge	sp!, {r10}		/* Fifth argument */
-	cmp	ip, #4
-	it	ge
-	stmfdge	sp!, {r3}		/* Fourth argument */
-	cmp	ip, #3
-	it	ge
-	stmfdge	sp!, {r2}		/* Third argument */
-	mov	r3, r1			/* Second argument */
-l_hooksvc:
-	mov	r2, r0			/* First argument */
-	mov	r1, r9			/* calinf */
-	ldr	r0, [r5]		/* fncd */
-	ldr	ip, =Csym(knl_hook_enterfn)
-	ldr	ip, [ip]
-	blx	ip			/* exinf = enter(fncd, ...) */
-	mov	ip, r0			/* Temporarily save 'exinf' */
-
-	mov	sp, r8			/* Return stack position */
-	ldmfd	sp!, {r0-r3, r8-r10}	/* Restore argument and register for work */
-	stmfd	sp!, {ip}		/* Save 'exinf' to stack */
-	b	ret_hook_enter
-
-	.thumb_func
-hook_leave:
-	mov	r1, r0			/* r1 = ret */
-
-	mov	lr, #0
-	ldr	r0, [r5]		/* r0 = Function code */
-	cmp	r0, #0			/*	< 0: System call */
-	bge	l_hooksvc2		/*	>= 0: Extended SVC */
-
-	mov	lr, r0, lsr #8
-	and	lr, lr, #0xff		/* Number of arguments */
-	subs	lr, lr, #4
-	it	lt
-	movlt	lr, #0
-l_hooksvc2:
-
-	add	lr, lr, #1		/* Whether 'hook_enter' is executed */
-	sub	ip, sp, r5		/* Check by stack usage */
-	sub 	r7, r5, #10*4		/* Location in which 'sp = exinf' is saved */
-	cmp	lr, ip, lsr #2		/* If 'hook_enter' is executed, */
-	ite	eq
-	ldreq	r2, =0			/* Get 'exinf' from stack */
-	ldrne	r2, [r7]		/* If 'exinf' is not saved, 0 */
-
-	str	r9, [r7]		/* r9 save */
-	mov	r9, r1			/* Save 'ret' in 'r9' */
-
-	ldr	ip, =Csym(knl_hook_leavefn)
-	ldr	ip, [ip]
-	blx	ip			/* call leave(fncd, ret, exinf) */
-
-	mov	r0, r9			/* r0 = ret restore */
-	ldr	r9, [r7]		/* r9 restore */
-	b	ret_hook_leave
-
-/*
- * Set/Free system call/extended SVC hook routine
-*/
-	.text
-	.align 2
-
-	.thumb
-	.thumb_func
-	.globl Csym(knl_hook_svc)
-Csym(knl_hook_svc):
-	ldr	r0, =hook_enter_jmp
-	ldr	r1, =hook_leave_jmp
-	ldr	r2, =hook_enter
-	ldr	r3, =hook_leave
-	str	r2, [r0]
-	str	r3, [r1]
-	bx	lr
-
-	.thumb
-	.thumb_func
-	.globl	Csym(knl_unhook_svc)
-Csym(knl_unhook_svc):
-	ldr	r0, =hook_enter_jmp
-	ldr	r1, =hook_leave_jmp
-	ldr	r2, =ret_hook_enter
-	ldr	r3, =ret_hook_leave
-	str	r2, [r0]
-	str	r3, [r1]
-	bx	lr
-
-	.data
-hook_enter_jmp:	.long	ret_hook_enter
-hook_leave_jmp:	.long	ret_hook_leave
-
-#endif /* USE_DBGSPT & USE_HOOK_TRACE */
-#endif /* USE_TRAP | USE_DBGSPT | CFN_MAX_SSYID > 0 */
-
-/* ------------------------------------------------------------------------ */
-
-#if USE_DBGSPT & (USE_TRAP | USE_HOOK_TRACE)
-/*
- * Debugger support function service call entry table
- */
-
-	.text
-	.align	2
-	.thumb
-_tdsvctbl:
-	.int	Csym(knl_no_support)
-#include <sys/svc/tdsvctbl.h>
-
-/*
- * Debugger support function service call entry
- */
-	.text
-	.align 2
-	.thumb
-	.thumb_func
-	.globl Csym(knl_call_dbgspt)
-Csym(knl_call_dbgspt):
-
-	stmfd	sp!, {r4-r6, lr}	/* Save register for work */
-
-	mov 	r4, ip			/* r4 -> func code */
-	mov	r5, r4, asr #16		/* r5 = Function number */
-	ldr	r6, =N_TDFN + 0xffff8000
-	cmp	r5, r6
-	bgt	b_illegal_svc
-
-	ldr	ip, =_tdsvctbl - (0xffff8000 << 2)
-	add	r4, ip, r5, lsl #2
-	ldr	r4, [r4]		/* r4 = system call address */
-	blx	r4
-
-b_retsvc:
-	ldmfd	sp!, {r4-r6, lr}	/* Restore register for work */
-	EXC_RETURN
-
-
-b_illegal_svc:
-	ldr	r0, =E_RSFN
-	b	b_retsvc
-
-#endif /* USE_DBGSPT & (USE_TRAP | USE_HOOK_TRACE) */
-
-
-/* ------------------------------------------------------------------------ */
-/*
  * High level programming language routine for timer handler
  */
 	.text
@@ -759,21 +239,19 @@ b_illegal_svc:
 	.globl Csym(knl_timer_handler_startup)
 Csym(knl_timer_handler_startup):
 
-	stmfd	sp!, {r4-r5, ip, lr}	/* Register save */
+	push	{r3-r5, lr}		/* Register save */
 
 	ldr	r4, =Csym(knl_taskindp)	/* Enter task independent part */
 	ldr	r5, [r4]
-	add	r0, r5, #1
+	adds	r0, r5, #1
 	str	r0, [r4]
 
 	bl	Csym(knl_timer_handler)	/* call timer_handler() */
 
 	str	r5, [r4]		/* Leave task independent part */
 
-	ldmfd	sp!, {r4-r5, ip, lr}	/* Register restore */
+	pop	{r3-r5, pc}		/* Register restore */
 
-	bx	lr
-
 /* ------------------------------------------------------------------------ */
 
 /*
@@ -791,7 +269,7 @@ Csym(knl_force_dispatch):
 	str	r0, [r1]
 	dsb
 
-	mov	r0, #0
+	movs	r0, #0
 	bl	Csym(enaint)
 	bx	lr
 
diff -uNpr utkernel_source.orig/kernel/sysdepend/device/app_mb9af312k/icrt0.S utkernel_source/kernel/sysdepend/device/app_mb9af312k/icrt0.S
--- utkernel_source.orig/kernel/sysdepend/device/app_mb9af312k/icrt0.S	Fri May 10 10:32:00 2013
+++ utkernel_source/kernel/sysdepend/device/app_mb9af312k/icrt0.S	Thu Aug 29 05:37:35 2013
@@ -62,8 +62,9 @@ bss_done:
 #if USE_IMALLOC
 	ldr     r5, =SYSTEMAREA_TOP
 	cmp	r2, r5			/* _end or RAM_TOP */
-	it	hi
-	movhi	r5, r2			/* Either of High addresses */
+	bls	0f
+	mov	r5, r2			/* Either of High addresses */
+0:	
 	ldr	r0, =Csym(knl_lowmem_top)
 	str	r5, [r0]		/* knl_lowmem_top = _end or RAM_TOP */
 	ldr     r5, =SYSTEMAREA_END - (EXC_STACK_SIZE + TMP_STACK_SIZE)
@@ -80,7 +81,8 @@ bss_done:
 	ldr	r6, [r5]
 	ldr	r7, =0xFFFFF8FF
 	ands	r6, r6, r7
-	orrs	r6, r6, #0x0300		/* PRIGRP:SUBPRI = 4 : 4 */
+	ldr	r7, =0x0300		/* PRIGRP:SUBPRI = 4 : 4 */
+	orrs	r6, r6, r7
 	str	r6, [r5]
 
 	ldr	r5, =SCB_SHPR2
@@ -93,19 +95,20 @@ bss_done:
 
 	ldr	r5, =NVIC_IPR_FORCE_DISPATCH
 	ldr	r6, [r5]
-	movt	r6, #0xc030		/* force dispatch pri = 0xC, IRQ #94 pri = 0x3 */
+	ldr	r6, =0xc030		/* force dispatch pri = 0xC, IRQ #94 pri = 0x3 */
 	str	r6, [r5]
 
 	/* Enable software interrupt */
 	ldr	r0, =INTNO_FORCE_DISPATCH
 	bl	Csym(EnableInt)
 
-	ldr	r0, =INTNO_IRQ
-	bl	Csym(EnableInt)
+//	ldr	r0, =INTNO_IRQ
+//	bl	Csym(EnableInt)
 
 	ldr	r5, =SCB_CCR
 	ldr	r6, [r5]
-	orrs	r6, r6, #0x02
+	movs	r7, #0x02
+	orrs	r6, r6, r7
 	str	r6, [r5]
 
 kernel_start:
diff -uNpr utkernel_source.orig/kernel/sysdepend/device/app_mb9af312k/startup_rom.S utkernel_source/kernel/sysdepend/device/app_mb9af312k/startup_rom.S
--- utkernel_source.orig/kernel/sysdepend/device/app_mb9af312k/startup_rom.S	Fri May 10 10:32:01 2013
+++ utkernel_source/kernel/sysdepend/device/app_mb9af312k/startup_rom.S	Wed Aug 28 14:03:38 2013
@@ -65,7 +65,7 @@ setup_ram_vectors:
 	ldr     r1,	=__vector_org	/* src address */
 	ldr     r2,	=__vector_start	/* dst address */
 	ldr     r3,	=__vector_end
-	sub     r3,	r3,	r2	/* r3 := r3 - r2 = vector_size */
+	subs    r3,	r3,	r2	/* r3 := r3 - r2 = vector_size */
 
 vector_loop:
 	ldmia   r1!, {r0}
diff -uNpr utkernel_source.orig/kernel/sysdepend/device/app_mb9af312k/vector.S utkernel_source/kernel/sysdepend/device/app_mb9af312k/vector.S
--- utkernel_source.orig/kernel/sysdepend/device/app_mb9af312k/vector.S	Fri May 10 10:32:02 2013
+++ utkernel_source/kernel/sysdepend/device/app_mb9af312k/vector.S	Thu Aug 29 05:15:35 2013
@@ -53,7 +53,7 @@ __vector:
 	.word	0				/* 8 -> Reserved */
 	.word	0				/* 9 -> Reserved */
 	.word	0				/* 10 -> Reserved */
-	.word	Csym(knl_svcall_entry)		/* 11 -> Svcall */
+	.word	0				/* 11 -> Svcall */
 	.word	0				/* 12 -> Debug monitor */
 	.word	0				/* 13 -> Reserved */
 	.word	Csym(knl_dispatch_entry)	/* 14 -> Pend SV */
@@ -106,7 +106,7 @@ __extintvec:
 	.word	Csym(DMAC5_Handler)		/* 43: DMAC ch.5 */
 	.word	Csym(DMAC6_Handler)		/* 44: DMAC ch.6 */
 	.word	Csym(DMAC7_Handler)		/* 45: DMAC ch.7 */
-	.word	Csym(knl_call_entry)		/* 46:	Software Interrupt */
+	.word	0				/* 46:	Software Interrupt */
 	.word	Csym(knl_dispatch_to_schedtsk)	/* 47:	force dispatch */
 
 	.weak	Csym(knl_intvec)
diff -uNpr utkernel_source.orig/lib/libsvc/build/mb9af312k/makeifex.pl utkernel_source/lib/libsvc/build/mb9af312k/makeifex.pl
--- utkernel_source.orig/lib/libsvc/build/mb9af312k/makeifex.pl	Fri May 10 10:32:27 2013
+++ utkernel_source/lib/libsvc/build/mb9af312k/makeifex.pl	Sun Aug 25 06:52:35 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/lib/libsvc/build/mb9af312k/makeiftd.pl utkernel_source/lib/libsvc/build/mb9af312k/makeiftd.pl
--- utkernel_source.orig/lib/libsvc/build/mb9af312k/makeiftd.pl	Fri May 10 10:32:27 2013
+++ utkernel_source/lib/libsvc/build/mb9af312k/makeiftd.pl	Sun Aug 25 06:52:29 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/lib/libsvc/build/mb9af312k/makeiftk.pl utkernel_source/lib/libsvc/build/mb9af312k/makeiftk.pl
--- utkernel_source.orig/lib/libsvc/build/mb9af312k/makeiftk.pl	Fri May 10 10:32:27 2013
+++ utkernel_source/lib/libsvc/build/mb9af312k/makeiftk.pl	Sun Aug 25 06:52:23 2013
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     micro T-Kernel
diff -uNpr utkernel_source.orig/lib/libsvc/src/sysdepend/mb9af312k/callsvc.S utkernel_source/lib/libsvc/src/sysdepend/mb9af312k/callsvc.S
--- utkernel_source.orig/lib/libsvc/src/sysdepend/mb9af312k/callsvc.S	Fri May 10 10:33:40 2013
+++ utkernel_source/lib/libsvc/src/sysdepend/mb9af312k/callsvc.S	Mon Aug 26 03:25:13 2013
@@ -22,10 +22,9 @@
 	.globl	Csym(callsvc)
 	.type	Csym(callsvc), %function
 Csym(callsvc):
-	stmfd	sp!, {r1-r3}
+	push	{r1-r3,lr}
 	mov	ip, r0
 	mov	r0, sp
-	stmfd	sp!, {lr}
 
 #if USE_TRAP
 	svc	SVC_EXTENDED_SVC
@@ -33,7 +32,6 @@ Csym(callsvc):
 	bl	knl_call_entry
 #endif
 
-	ldmfd	sp!, {lr}
 	add	sp, sp, #3*4
-	bx	lr
+	pop	{pc}