gfw.exe: a simple Garmin firmware manipulation utility.

**Philipych** · 14th February 2016, 02:18 AM

@kunix
Hi, there is a problem here with this firmware B2268000B.GCD (B2267000B.GCD)
repacking GCD to RGN

[Only registered and activated users can see links. ]

000001000220.rgn

**kunix** · 14th February 2016, 08:52 AM

Thank you for the bug report. For some reason HWID is misdetected... I don't remember all the details about gfw internals, will check it later. Just put the HWID manually.

**kunix** · 18th February 2016, 08:22 AM

gfw.exe is right: HWID = 0 in the firmware. I think it's initialized to the right value by the bootloader.
I can suggest using bldfldrsmpl instead of bldfldr, as the latter is trying to be too smartass by additionally detecting HWID and SWVR from firmware internals.

**osiris4isis** · 16th October 2017, 10:07 PM

Can we get a "dump_rgn" option?

Code:

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**Butters** · 18th October 2017, 12:54 AM

kunix hasn't been active since the forum crashed. Why not just convert the RGN to a GCD and then run "dump_gcd"?

**osiris4isis** · 18th October 2017, 01:53 AM

Ugh, no. Because I'm working on a tool that will consolidates all the steps (and precautions) to make updating FW safe. No big deal, I'll figure it out eventually.

**Giomen** · 18th October 2017, 03:51 AM

Originally Posted by Butters

kunix hasn't been active since the forum crashed. Why not just convert the RGN to a GCD and then run "dump_gcd"?

Probably it is impossible too because Nuvi2585TVEU have not truly classic Garmin SW. It is Linux gibrid!

**Butters** · 18th October 2017, 08:25 AM

Yes of course. I hadn't looked at the fw naming.

O-thingy, are you intentionally mucking around with the 2585TV fw or did you just pick it out randomly?

**osiris4isis** · 19th October 2017, 06:51 PM

2585TV is definitely a Linux image (just like an .update file). After mounting you'll see (amongst other things)
boot.img.gz
bootloader.img.gz
system.img.gz
userdata.img.gz

So what would we need to manipulate?

Update: I see evidence of Android proggy.