PRS-500 Logging ebookUsb.dll calls

geekraver · 10-21-2006, 03:22 AM

If anyone is interested, I have made a replacement ebookUsb.dll that can be dropped in to the reader software directory. It logs all the calls into the DLL to a file c:\reader.log (and then calls into the real DLL; i.e. its just a thin wrapper).

Note that you *will* need to modify your existing ebookUsb.dll, changing the name to ibookUsb.dll, and changing the first letter of each entry point to be an I (so the Usb* functions become Isb* and the CheckBlock function becomes IheckBlock). Obviously you should keep a backup first. I'm not including a patched version of the original DLL due to copyright and other restrictions.

VS.Net project is available here . You can also use this to set breakpoints in calls in the VS debugger, etc. I did this mostly to figure out why my prsutils prog isn't copying files, but it could be useful to others who want to take things much further than I'm interested in going.

gseryakov · 10-21-2006, 08:54 AM

Quote:

Originally Posted by geekraver

Note that you *will* need to modify your existing ebookUsb.dll, changing the name to ibookUsb.dll, and changing the first letter of each entry point to be an I (so the Usb* functions become Isb* and the CheckBlock function becomes IheckBlock).

You can avoid the binary editing: use run-time dynamic linking (LoadLibrary/GetProcAddress). Another possibility could be (I am not 100% sure about it) to create a custom export lib with exports renaming like

Code:

; ibookUsb.def
LIBRARY      "ibookUsb"
EXPORTS
...
    IheckBlock = CheckBlock
...

dstewart · 12-29-2006, 08:25 PM

I modded the file to use LoadLibrary/GetProcAddress instead, which means you don't need to modify the original ebookUsb.dll in any way except temporarilty renaming it to ebookUsb.org.dll. However, I hesitate to release it as it crashes after a while

... I'll track that down -- but in the meantime, geekraver, as you seeing the same with your code? (seems to run fine for a while but then crashes after a call to UsbBeginEnd?)

kovidgoyal · 12-29-2006, 08:35 PM

You can also log the actual USB packets for more information using one of the many freely available USB packet sniffers.

geekraver · 12-30-2006, 01:06 AM

Quote:

Originally Posted by dstewart

I modded the file to use LoadLibrary/GetProcAddress instead, which means you don't need to modify the original ebookUsb.dll in any way except temporarilty renaming it to ebookUsb.org.dll. However, I hesitate to release it as it crashes after a while

... I'll track that down -- but in the meantime, geekraver, as you seeing the same with your code? (seems to run fine for a while but then crashes after a call to UsbBeginEnd?)

Haven't used this in a long time so I'm not sure, but I don't recall seeing crashes.

Guess you finally got yourself a reader for Xmas, eh Dave?

10-21-2006, 03:22 AM	#1
geekraver Addict Posts: 364 Karma: 1035291 Join Date: Jul 2006 Location: Redmond, WA Device: iPad Mini,Kindle Paperwhite	Logging ebookUsb.dll calls If anyone is interested, I have made a replacement ebookUsb.dll that can be dropped in to the reader software directory. It logs all the calls into the DLL to a file c:\reader.log (and then calls into the real DLL; i.e. its just a thin wrapper). Note that you will need to modify your existing ebookUsb.dll, changing the name to ibookUsb.dll, and changing the first letter of each entry point to be an I (so the Usb* functions become Isb* and the CheckBlock function becomes IheckBlock). Obviously you should keep a backup first. I'm not including a patched version of the original DLL due to copyright and other restrictions. VS.Net project is available here . You can also use this to set breakpoints in calls in the VS debugger, etc. I did this mostly to figure out why my prsutils prog isn't copying files, but it could be useful to others who want to take things much further than I'm interested in going. Last edited by geekraver; 10-21-2006 at 03:33 AM.

12-29-2006, 08:25 PM	#3
dstewart Junior Member Posts: 3 Karma: 10 Join Date: Dec 2006 Location: Seattle, WA Device: Sony PRS-500	GetProcAddress version I modded the file to use LoadLibrary/GetProcAddress instead, which means you don't need to modify the original ebookUsb.dll in any way except temporarilty renaming it to ebookUsb.org.dll. However, I hesitate to release it as it crashes after a while ... I'll track that down -- but in the meantime, geekraver, as you seeing the same with your code? (seems to run fine for a while but then crashes after a call to UsbBeginEnd?)

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12-29-2006, 08:35 PM	#4
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You can also log the actual USB packets for more information using one of the many freely available USB packet sniffers.

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