--- Log opened Thu Mar 03 00:01:56 2011
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08:58 < STeeF> Does anyone know the requirements for a png using the libpng png_decode_rgba emCORE call? I thought 8bit RGBA
09:15 < TheSeven> STeeF: it supports everything except interlaced
09:15 < STeeF> hmmm ok
09:16 < STeeF> I was playing around with the boot-menu
09:16 < TheSeven> so even things like 16bit greyscale will hopefully be transcoded to RGBA8888
09:16 < STeeF> and tried to change (add) and image
09:16 < TheSeven> however those weird formats haven't really been tested yet ;)
09:17 < STeeF> to the psd and in GIMP saved-as png and it gave an decoding error
09:17 < STeeF> Cannot parse icon set
09:17 < TheSeven> what certainly works is 8bit RGB/RGBA and indexed, so basically everything I've seen in the wild so far
09:18 < TheSeven> can you pass me the file that it didn't like?
09:19 < STeeF> ehu, I'll have to trick around a bit (I don't have internet on my laptop at work)
09:22 < STeeF> TheSeven, http://www.mediafire.com/?c6z017faepsvwb7
09:23 < STeeF> Btw, I'm porting the uninstaller from embios to emcore just as practise 
09:24  * TheSeven suggests making a backup of the sysinfo first :)
09:28 < STeeF> TheSeven, what do you mean with sysinfo? The flash or HDD?
09:30 < TheSeven> flash
09:31 < STeeF> ok, but if I'm correct I can always use DFU to 'restore' emCORE right?
09:32 < TheSeven> yes, but there is no way to restore the sysinfo if you lose it
09:33 < TheSeven> it's unique to each ipod
09:33 < STeeF> aha I get it, can the backup be done using emCORE?
09:37 < TheSeven> yes
09:37 < TheSeven> emcore memalign 16 0x1000
09:37 < TheSeven> note the address of the buffer
09:37 < TheSeven> emcore readbootflash 0x1000 <address> 0x1000
09:38 < TheSeven> emcore downloadfile <address> 0x1000 sysinfo.bin
09:38 < TheSeven> emcore free <address>
09:38 < TheSeven> after that, have a look at the sysinfo.bin file
09:39 < TheSeven> should start with some bytes like this:
09:39 < TheSeven> 00000000   67 66 43 53 CC 00 00 00  00 20 00 00 01 00 01 00  00 00 00 00 09 00 00 00  6D 4E 72 53 38 4B 37 33   gfCSÌ.... ..............mNrS8K73
09:40 < TheSeven> regarding the PNG file: seems like you found a bug :/
09:40 < TheSeven> i have no idea what's going on yet, need to write some simple png viewer app first to debug it
09:40 < TheSeven> doing it inside the boot menu is a bit complicated
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09:40 < STeeF> Yep
09:41  * STeeF thought It might me a Linux / GIMP / libpng related issue
09:41 < STeeF> as your images are made with Adobe products (i guess on Windows)
09:42 < STeeF> I'll backup the flash first, and after that experiment with the uninstaller :)
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09:50 < TheSeven> the PNG can be opened fine by other programs, so it's probably just that you're triggering some bug somewhere in the parser
09:51 < TheSeven> i've already tried removing some non-essential information from it (sRGB, pHYs, tIME), but it didn't help
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10:26 < TheSeven> STeeF: trace log: http://pastie.org/1628045
10:27  * TheSeven has leave for work now
10:27 < TheSeven> i'll look at this in the evening
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14:55 < TheSeven> STeeF: something is wrong with the IDAT block merging
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15:04 < STeeF> TheSeven, from the w3-standard:
15:04 < STeeF> There may be multiple IDAT chunks; if so, they shall appear consecutively with no other intervening chunks. The compressed datastream is then the concatenation of the contents of the data fields of all the IDAT chunks.
15:05 < STeeF> if I'm informed correctly photoshop creates a single IDAT chunk while the GIMP / libpng doesn't....
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15:07 < TheSeven> seems like that
15:16  * STeeF just found the exsisting of pngchunks giving debug information about the number of png chunks in a png :)
15:16 < STeeF> It is indeed correct PhotoShop creates one chunk, while GIMP created multiple chunks
15:16 < STeeF> :)
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15:36 < STeeF> TheSeven, I used the command 'pngcrush' to force the window size of the IDAT to large enough to have only one IDAT chunk
15:37 < STeeF> rebuild the bootmenu and installer, tried and tested it works!!Now I got my own Icon in the boot menu :)
15:37 < TheSeven> we should nevertheless fix it
15:38 < STeeF> sure, but I use this work-a-round for now :)
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--- Log opened Thu Mar 03 16:57:36 2011
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21:57 < bcoco851> another strange behaviour with r29510
21:58 < bcoco851> sometimes rockbox mount
21:58 < bcoco851> some other times, it returns 
21:58 < bcoco851> Mar  3 22:56:55 debian kernel: [24317.340560] sd 11:0:0:0: [sdd] Unhandled error code
21:59 < bcoco851> (and relater error lines)
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23:33 < paulo_> TheSeven: do you know where the pwnage 2.0 exploit is?
23:34 < paulo_> in the ida
23:34 < TheSeven> you mean where in the bootrom the vulnerability that is being exploited by pwnage 2.0 is?
23:35 < paulo_> yes :)
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23:55 < TheSeven> paulo_: IIRC it's 0x2000690C
23:57 < paulo_> TheSeven: there's nothing there
23:57 < paulo_> null bytes
23:57 < TheSeven> paulo_: on which device?
23:57 < TheSeven> i'm talking about the S5L8702 here
23:58 < paulo_> the idb file you gave me
23:58 < paulo_> isn't this the nano 2g?
--- Log closed Fri Mar 04 00:02:15 2011