diff --git a/examples/rules.mk b/examples/rules.mk
index 6314380ec..55e39f4ed 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -182,10 +182,12 @@ flash-jlink: $(BUILD)/$(PROJECT).hex
 flash-stlink: $(BUILD)/$(PROJECT).elf
 	STM32_Programmer_CLI --connect port=swd --write $< --go
 
-flash-xfel: $(BUILD)/$(PROJECT).bin
-	xfel ddr 
-	xfel write 0x80000000 $<
-	xfel exec 0x80000000
+$(BUILD)/$(PROJECT)-sunxi.bin: $(BUILD)/$(PROJECT).bin
+	$(PYTHON) $(TOP)/tools/mksunxi.py $< $@
+
+flash-xfel: $(BUILD)/$(PROJECT)-sunxi.bin
+	xfel spinor write 0 $<
+	xfel reset
 
 # Flash using pyocd
 PYOCD_OPTION ?=
diff --git a/hw/bsp/f1c100s/board.mk b/hw/bsp/f1c100s/board.mk
index 993aa0d24..9bd9380a7 100644
--- a/hw/bsp/f1c100s/board.mk
+++ b/hw/bsp/f1c100s/board.mk
@@ -41,5 +41,10 @@ INC += \
 	$(TOP)/$(MCU_DIR)/include \
 	$(TOP)/$(BOARD_PATH)
 
-# flash target using on-board stlink
+# flash target using xfel
 flash: flash-xfel
+
+exec: $(BUILD)/$(PROJECT).bin
+	xfel ddr 
+	xfel write 0x80000000 $<
+	xfel exec 0x80000000
\ No newline at end of file
diff --git a/hw/mcu/allwinner/f1c100s/f1c100s.ld b/hw/mcu/allwinner/f1c100s/f1c100s.ld
index a261618e5..43c353bbd 100644
--- a/hw/mcu/allwinner/f1c100s/f1c100s.ld
+++ b/hw/mcu/allwinner/f1c100s/f1c100s.ld
@@ -21,15 +21,15 @@ SECTIONS
 		PROVIDE(__bootloader_start = .);
 		PROVIDE(__image_start = .);
 		PROVIDE(__text_start = .);
-		*/machine/start.o (.text)
-		*/lib/memcpy.o (.text)
-		*/lib/memset.o (.text)
-		*/machine/sys-uart.o (.text)
-		*/machine/sys-clock.o (.text)
-		*/machine/sys-dram.o (.text)
-		*/machine/sys-mmu.o (.text)
-		*/machine/sys-spi-flash.o (.text)
-		*/machine/sys-copyself.o (.text)
+		_build/*/obj/hw/mcu/allwinner/*/machine/start_asm.o (.text)
+		_build/*/obj/hw/mcu/allwinner/*/lib/memcpy_asm.o (.text)
+		_build/*/obj/hw/mcu/allwinner/*/lib/memset_asm.o (.text)
+		_build/*/obj/hw/mcu/allwinner/*/machine/sys-uart.o (.text*)
+		_build/*/obj/hw/mcu/allwinner/*/machine/sys-clock.o (.text*)
+		_build/*/obj/hw/mcu/allwinner/*/machine/sys-dram.o (.text*)
+		_build/*/obj/hw/mcu/allwinner/*/machine/sys-mmu.o (.text*)
+		_build/*/obj/hw/mcu/allwinner/*/machine/sys-spi-flash.o (.text*)
+		_build/*/obj/hw/mcu/allwinner/*/machine/sys-copyself.o (.text*)
 		PROVIDE(__bootloader_end = .);
 	} > ram
 
@@ -37,7 +37,6 @@ SECTIONS
 
 	.text :
 	{
-		*/main.o (.text)
 		*(.text*)
 		*(.glue*)
 		*(.note.gnu.build-id)
diff --git a/tools/mksunxi.py b/tools/mksunxi.py
new file mode 100644
index 000000000..04786f429
--- /dev/null
+++ b/tools/mksunxi.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+import sys
+import struct
+
+def align(num, alignment):
+    if num % alignment != 0:
+        num += (alignment - num % alignment)
+    return num
+
+
+def process_file(input, output):
+    with open(input, 'rb') as fin:
+        content = bytearray(fin.read())
+
+    align_value = 512
+    padded_length = align(len(content), align_value)
+    # pad file to actual length
+    content += b'\x00' * (padded_length - len(content))
+
+    struct_format = '<L8sLL'
+    (instruction, magic, checksum, length) = struct.unpack_from(struct_format, content)
+
+    if magic != b'eGON.BT0':
+        print("Magic is invalid:", magic)
+        return 2
+
+    checksum = 0x5F0A6C39
+    length = align(length, align_value)
+
+    struct.pack_into(struct_format, content, 0, instruction, magic, checksum, length)
+
+    checksum = 0
+    for i in range(0, length, 4):
+        (n, ) = struct.unpack_from('<L', content, i)
+        checksum += n
+        checksum %= 4294967296
+
+    struct.pack_into(struct_format, content, 0, instruction, magic, checksum, length)
+
+    with open(output, 'wb') as fout:
+        fout.write(content)
+    return 0
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: mksunxi.py input.bin output.bin")
+        exit(1)
+    exit(process_file(sys.argv[1], sys.argv[2]))
\ No newline at end of file