There are literally 2 of you reinventing the wheel here.
"What is this Safestrap thing? "
You think you're in over you're heads?
"What is this Safestrap thing? "
You think you're in over you're heads?
Would it be plausible to use JTAG to rewrite an unlocked firmware?
- Thread starter dreamwave
- Start date
Except getting a custom kernel or full aosp on the verizon/at&t s5 hasn't been done once yet...
And TBH It would be over my head if I were right off the bat asking how to "write with machine code", but that's not what I'm trying to do. I had an idea that's actually pretty simple that I think I understand what is involved for that would solve...let's just say a problem that gathered somewhere in the realm of 20,000 USD. Also, I'll take "reinventing the wheel" here as a compliment, it means the way I'm doing it hasn't been done before and isn't just using the "wheel" that already exists...a somewhat temperamental method that doesn't give full choice of custom roms and makes it so you're screwed if you run into a bug in the OS that leads to a bootloop or FC of critical apps
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whoa whoa whoa whoah.
Ok, so I think I wasn't getting what you were saying until I saw your post on /r/galaxys5
Are you thinking of bricking the S5 you have so that way you can use the older boot img that would be located on your sdcard instead of the one that is locked down on the device??
Pretty much
:silly:But not an older boot image necessarily, just a new one that I've modified a bit
That would be very interesting. Do you know if anyone has used that method on the S5? As far as booting from the sdcard. Whether it was to fix corruption, or whatever intention.Pretty much
But not an older boot image necessarily, just a new one that I've modified a bit
If anyone has successfully booted from sd without root, then the next step would be seeing if we can use that as a workaround to boot verification like you said. Which would be easily correctable if it doesn't succeed.
---------- Post added at 07:22 PM ---------- Previous post was at 07:13 PM ----------
I just got the S5 and am starting research as I type. Excuse me for thinking out loud. It is how I get things done. I am aware of what safestrap is. I worked with the Droid X Bootstrap to port MIUI during closed source development. Framework and I were the only two working on the project, and we handled it in a matter of days. I think we can manage a little init business.
Yea, I wouldn't see the point in "recovering" to another version of a locked system lololPretty much
But not an older boot image necessarily, just a new one that I've modified a bit
I forgot that you posted about the success of another s5 user utilizing the secondary boot method. I'm going to see what verification methods it takes into place. I'm thinking it shouldn't need to be the same version as the one in place on the system, hopefully. (Most likely not since the hash wouldn't match regardless) Hmmmm interesting stuffs.
---------- Post added at 07:25 PM ---------- Previous post was at 07:22 PM ----------
It just might be that each user will have to create their own recovery sd based on what you linked to me. Since everyone has their own key. After creating your sd, you would then soft brick, recover to the modified sd recovery and go from there... Correct?Pretty much
But not an older boot image necessarily, just a new one that I've modified a bit
Edit: I'm thinking the recovery sd might have to be made before taking the update to OE1+ unless we can merge the current sd recovery with the necessary bits from the kit kat tar. Let's start digging though. Just something to look out for.
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The folks over http://forum.xda-developers.com/verizon-galaxy-s5/help/g900v-hard-brick-t2914847 seem to have gotten it to boot from an sd, so it's a start :fingers-crossed:
actually needs to be what most would consider a "hard brick", basically no useful info in any bootable partition :silly:
and the recovery image can be created just by using DD to copy the first couple hundred megs off eMMC, then overwriting the SBL with a modified file appropriate for the firmware version you already had (it needs to be the same version, I've played around with it on the s3 and it's pretty specific)
Yea yea yea. Soft/Hard you know what I mean lol. Are you actively pursuing this as well, or just throwing ideas into the atmosphere to inspire people?
Actively pursuing as much as I can from a very booked Junior Year at high school
Whenever I have time I can be working on this...it'd be really cool if it works
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As long as you're putting in field time. I'll be creating a recovery sd img today. Then I'll see what modifications it will allow. Let me know if you run into anything. Whether it is +-. Please and thank you!Actively pursuing as much as I can from a very booked Junior Year at high school
I absolutely will, thanks for helping
What you're looking for is somewhere within it a signature/hash check. Modify that to basically anything the same length and try booting from the card. If it works then I think we'll have guaranteed it will work
No problem. I either want to find root, or abandon Samsung. Hopefully the first option since I haven't done anything for the community in several years.I absolutely will, thanks for helping
What you're looking for is somewhere within it a signature/hash check. Modify that to basically anything the same length and try booting from the card. If it works then I think we'll have guaranteed it will work
I'm surprised no one's tried this...I haven't been able to find anything anywhere where someone experimented with this even with the $20,000 bounty on it. I wonder if it's still there
I kind of wonder what size it needs to be in order to work (the debrick image)
Would you be able to upload a dump so I can look? My normal computer is acting funny so I'm on my chromebook.
I'll post some logs when I make any attempts at this. I haven't had the chance to play around yet.
Ok sounds good, I'm at school but should be able to make a dump of my own when I get back home (hopefully if I don't have too much homework from AP Language and APUSH :/)
Yeah I have very little time this week but over the weekend I expect to have time
Friday...soooooo I think I'll have time over today and this weekend to do a dump and try modifying it to see if it hash checks even the recovery image.
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