Archos

[sashz]

Sashz,
Can you recomend good arm dissasembler, I looked on net for one but can't find good free one. Using dumpobj is a pain.

Didn't discover much last night.
Just if you have USB host connected when on blue debug screen it will sit there until you disconnect, and you can access HD wfrom host when on blue screen.
Interestring strings in ROM as you say. Same that say "duddudu" etc though might be button press combos, but no luck trying them.
Do you think there might be a terminal open somewhere ?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100298\"][{POST_SNAPBACK}][/a][/div]

Use IDA - commercial Interactive Disassembler (look in p2p  )

If Archos connected to host during power up , that will wait disconnect and work as storage.
So in this mode you can restore corrupted fs or system.

Dunno about terminal software , there inside messages about USB2 port, so maybe its possible:) Anyway need disassembly and learn rom. Official french office says they cannot give us signature generator because security issues  So archos unlike linux and opensources i guess even if they released pma400 )

[pyknite]

when the will work on pdaxrom, the usb host will run???

thx

[fantshare]

Shame, it would be good for their sales I think.

Official french office says they cannot give us signature generator because security issues  So archos unlike linux and opensources i guess even if they released pma400 )
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100319\"][{POST_SNAPBACK}][/a][/div]

[j4p13j0]

This is interesting stuff !
I have tried to dissasemble the firmware but never succeeded in mounting the resulting cramfs. Never figured out if the problem was related to xip-linear
patches I needed, or the image being bad.  

What did you do to mount the cramfs ?

And how would the pdaxrom work ? Changeroot from qtopia, killing qpe and starting X ? Or hacking the image so qpe does not start at all ?

I'd be very interested in helping, but must say I have no experience using arm (dis)assembler or kernel coding.  
BTW, are you using the latest (1.14-2) firmware for the kernel ? Or do you use 1.13-2 which, I believe, is more stable ?

[fantshare]

This is interesting stuff !
I have tried to dissasemble the firmware but never succeeded in mounting the resulting cramfs. Never figured out if the problem was related to xip-linear
patches I needed, or the image being bad.  

What did you do to mount the cramfs ?

And how would the pdaxrom work ? Changeroot from qtopia, killing qpe and starting X ? Or hacking the image so qpe does not start at all ?

I'd be very interested in helping, but must say I have no experience using arm (dis)assembler or kernel coding.   
BTW, are you using the latest (1.14-2) firmware for the kernel ? Or do you use 1.13-2 which, I believe, is more stable ?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100593\"][{POST_SNAPBACK}][/a][/div]

Ultimately I would like to boot direct into pdaxrom, but first there will be a chroot method I expect.

To mount the cramfs on pc I did:
Search in aimage.img for bytes 45 3d cd 28 (this is the cramfs header start)
Then extract all  from that offset onwards to create a  cramfs.img (using dd)
I mounted it with:

mkdir /PMA400/rom
mount -o loop -t cramfs cramfs.img /PMA400/rom

The problem is in modfying the cramfs or the precceding data (kernel) and building a new aimage.img, because there are two meaty signatures at the start of aimage.img that are checked at boot time.

[j4p13j0]

Ultimately I would like to boot direct into pdaxrom, but first there will be a chroot method I expect.

To mount the cramfs on pc I did:
Search in aimage.img for bytes 45 3d cd 28 (this is the cramfs header start)
Then extract all  from that offset onwards to create a  cramfs.img (using dd)
I mounted it with:

mkdir /PMA400/rom
mount -o loop -t cramfs cramfs.img /PMA400/rom

The problem is in modfying the cramfs or the precceding data (kernel) and building a new aimage.img, because there are two meaty signatures at the start of aimage.img that are checked at boot time.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100608\"][{POST_SNAPBACK}][/a][/div]

Yes, I tried that but my pc hangs when reading the files in the image, because I can't seem to get my kernel patched properly for the cramfs features that are used, esp. the xip stuff. Oh well, it's not going to be of much help untill that signature checking gets reverse-engineered  

Would love to help but wouldn't know where to start.... I have got some different
firmware releases (1.12, 1.13-2, 1.14-1 and 1.14-2) if anyone is interested for analysis of how the sig is created...

[clayde]

for information you can make
a script for editing /etc/rc.d/rc.qpe
(this file is respawn by inittab)
and add in this:
 kill qpe and start pdxarom in chrootmode for example


and after this modification,  kill the process with name /bin/sh (he is rc.qpe)
then the new rc.qpe starting,
Excuse me for my english,

Clayde

[pyknite]

for information you can make
a script for editing /etc/rc.d/rc.qpe
(this file is respawn by inittab)
and add in this:
 kill qpe and start pdxarom in chrootmode for example


and after this modification,  kill the process with name /bin/sh (he is rc.qpe)
then the new rc.qpe starting,
Excuse me for my english,

Clayde
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100617\"][{POST_SNAPBACK}][/a][/div]

i try to kill qpe with a command find in qpe.sh (a script for start or stop qpe), i insert it in rc.qpe but it doesn't work...

i will try with kill qpe... i'm trying to rotate the screen

one interesting thing is when you chmod rc.qpe and execute, an 2nd qtopia run... if we can make an applet we can have some virtual desktop like  a desktop pc...

[fantshare]

Sashz,
How is it going with the first beta release ?
Will there be one soon ?

[pyknite]

no news yet?

[sashz]

sorry for delay, i still work with bootrom disassembling:)

[pyknite]

sorry for delay, i still work with bootrom disassembling:)
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100890\"][{POST_SNAPBACK}][/a][/div]

no probleme

but have you a date?

++

[tixmcprods]

sorry for delay, i still work with bootrom disassembling:)
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100890\"][{POST_SNAPBACK}][/a][/div]

no probleme

but have you a date?

++
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100891\"][{POST_SNAPBACK}][/a][/div]

Re,

I'd like to know how we'll have to install it on our PMA430 ? A big aimage.img file or another boot-script, which will give choice for boot ?
Need a date too  .

Thanks.

PS : Sorry for my bad english

[pyknite]

sorry for delay, i still work with bootrom disassembling:)
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100890\"][{POST_SNAPBACK}][/a][/div]

no probleme

but have you a date?

++
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100891\"][{POST_SNAPBACK}][/a][/div]

Re,

I'd like to know how we'll have to install it on our PMA430 ? A big aimage.img file or another boot-script, which will give choice for boot ?
Need a date too  .

Thanks.

PS : Sorry for my bad english
[div align=\"right\"][a href=\"index.php?act=findpost&pid=100966\"][{POST_SNAPBACK}][/a][/div]

we speak about that one page before

we will chroot the rom from qtopia... and if i understand correctly, pdaxrom will kill qtopia and appear

[pma430@pointlisse.com]

Hi,

I just started a PMA430 resource site, and this could be a good edition. Please let me know if/when it's ready to test and I'd be happy to post it on my site as well.

Any other info appreciated, too... What it can/will do, advantages, future plans, etc. Thanks!

www.pointlisse.com/PMA430