Linux 커널 이미지를 백업하는 방법

마더보드는 NAND 플래시 장치인 NAND 32MiB에서 임베디드 Linux v2.6.26.5를 실행하는 ARM926EJ CPU를 사용합니다. Linux는 NAND 장치의 MTD 파티션에 있습니다.

직렬 인터페이스에서 Linux 커널 이미지(SP2Xcybertan_rom_bin)를 백업하는 방법은 무엇입니까? tftp를 통해 보드에서 호스트 PC로 파일을 전송하는 TFTP 옵션이 없기 때문입니다. 낸드를 일부 메모리 주소로 읽고 출력을 터미널에 덤프하고 저장한 다음 16진수를 이진수로 변환할 수 있습니다.

nand read 0x20000000  0x80000  0x0017FF80
md.b 0x20000000 0x0017FF80

부팅 프로세스 로그에서:

U-Boot 2009.03 (Oct 06 2011 - 20:04:03)

Stack:->21F1EC74 U-Boot code: 21FC4D00->21FF9454  BSS:->21FFFF3B
CPU: PNX8181-2B OM6xxx-ARM926EJ-S(ARMv5TEJ) @ 221MHz(armclk), 110MHz(hclk)
Board: Vega_PNX8181_BaseStation Platform IV (LC)
I2C:   ready
RAM Configuration:
Bank #0: 20000000 32 MB
NAND:  32 MiB
In:    serial
Out:   serial
Err:   serial
Use Full Image's Kernel
Net:   VLAN Mode
L2 switch present
ETN1
Hit any key to stop autoboot:  0 

Loading from NAND 32MiB 3,3V 8-bit, offset 0x80000
   Image Name:   SP2Xcybertan_rom_bin
   Created:      1970-01-01   0:00:-1 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1572736 Bytes =  1.5 MB
   Load Address: 20008000
   Entry Point:  20008000
## Booting kernel from Legacy Image at 20200000 ...
   Image Name:   SP2Xcybertan_rom_bin
   Created:      1970-01-01   0:00:-1 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1572736 Bytes =  1.5 MB
   Load Address: 20008000
   Entry Point:  20008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...
Uncompressing Linux.........

환경 변수

firetux # printenv
baudrate=115200
ethaddr=FF:FF:FF:FF:FF:FF
netmask=255.255.255.0
ipaddr=192.168.1.1
serverip=192.168.1.100
bootfile=firetux.kernel
bootcmd1=setenv bootargs ${bootargs} && nboot 0x20200000 0 ${image_addr} && bootm 0x20200000
bootcmd2=setenv bootargs ${bootargs} && tftpboot 20200000 firetux.kernel && bootm 20200000
phymode=auto
mtdids=nand0=gen_nand
unlock=yes
verify=y
update.uboot=echo Update u-boot && tftpboot 0x20000000 nandboot.flash && nand erase 0x0 0x03ffff && nand write.jffs2 0x20000000 0x0 ${filesize}
update.kernel=echo Update kernel && tftpboot 0x20000000 uImage && nand erase 0x80000 0x180000 && nand write.jffs2 20000000 0x80000 0x180000
update.romimg=echo Update RomImage && tftpboot 0x20000000 romimage.img && nand erase 0x80000 0x13e0000&& nand write.jffs2 20000000 0x80000 ${filesize}
update.halfimg=echo Update HalfImage && tftpboot 0x20000000 recovery.img && nand erase 0x1460000 0x700000&& nand write.jffs2 20000000 0x1460000 ${filesize}
eraseenv=echo Erase Environment && nand erase 0x60000 0x20000
HwModel=Hw_Model=SPA122
bootcmd=run bootcmd1
halfImage=half_image=0
cy_boot_code_ver=1.0.1 (Oct  6 2011 - 20:04:00)
RouterMode=Router_Mode=0
stdin=serial
stdout=serial
stderr=serial
bootcmd=run bootcmd1
image_addr=0x80000
bootargs=console=ttyS1,115200n8 rootfstype=squashfs noalign half_image=0 verify=y Hw_Model=SPA122 Router_Mode=0
ethact=ETN1
bootdelay=3 

부팅 프로세스 측면에서 커널(uImage)과 romimage(romimg.img)의 차이점은 무엇입니까?