Dear Wolfgang Denk,
My ISP doesn't have the source of U-Boot because they left the original one (from ZTE) on the router. They modified the main firmware only. I want to make a dump from the hall flash and then install a new main firmware. I tried md but it made the router restart (except with address 0x00000000).
Szabolcs Sipos
-----Original Message----- From: Wolfgang Denk [mailto:wd@denx.de] Sent: Tuesday, June 25, 2013 8:32 PM To: Szabolcs Sipos Cc: u-boot@lists.denx.de Subject: Re: [U-Boot] Save flash from U-Boot
Dear "Szabolcs Sipos",
In message 000101ce71cd$34a620a0$9df261e0$@balfug.com you wrote:
Unfortunately the bootloader isn't modified by the ISP, only the main firmware. If a knew that the main firmware was also covered by GPL, I would ask them but I am sure they would tell me nothing, they don't tell even my VOIP password.
I'm afraid I don't understand your situation. If you have the U-Boot code, you could add the missing commands, and just install teh new U-Boot, leaving the rest of the firmware untouched?
As for backup, if everything else goes wrong, you can just run a "md" over the whole U-Boot code area, and capture the outpput to a file (say, by running your terminal program in a "script" session if it does not support recording directly). Recoding the "md" output into a binary blob is a trivial thing to do; a quick & dirty hack could look like that:
--------------------------- snip --------------------------- #!/usr/bin/perl -w
# Un-dump hexdump listing and write binary image to stdout. # 002044F4 3C353E5B 20202020 302E3030 30303030 <5>[ 0.000000 # 00204504 5D204C69 6E757820 76657273 696F6E20 ] Linux version # 00204514 322E362E 32322E36 20286D61 7263656C 2.6.22.6 (marcel # 00204524 40736861 646F776C 61702920 28676363 @shadowlap) (gcc # 00204534 20766572 73696F6E 20342E31 2E322028 version 4.1.2 ( # ... #
while (<>) { chomp; my (@tmp) = split; for ($i=1; $i<5; $i++) { syswrite(STDOUT, pack ("N", hex ($tmp[$i]))); } } --------------------------- snip ---------------------------
Best regards,
Wolfgang Denk