DriverStudio 3.2 - Can't set breakpoint in DLL function

[sackpower]

I tried to set a breakpoint on a well known DLL function, but SoftIce 3.2 returns a "NO LDT" error (no Local Descriptor Table) and doesn¡¯t accept the breakpoint. In SoftIce 3.1 the same works very well.

Here is what I wanted to do:

1) Start Symbolloader and load exports dynamically from ¡°mytest.dll¡±.
2) From Symbolloader, open the application ¡°myApp.exe¡± (which uses ¡°mytest.dll¡±) and press ¡°Load symbols¡±. SoftIce pops up.
3) Set breakpoint: bpx mytest!myfunc - SoftIce says: "NO LTD" and doesn¡¯t accept the breakpoint.

What is going wrong here?

Any help on this point would be greatly appreciated.

Sackpower

Maybe you should try to set a breakpoint as 'bpx myfunc' or 'bpx addr', where addr is the address of your myfunc function.

And what did happen if you enter
'u mytest!myfunc'
did it show the correct part of code ???

i recently get driverstudio 3.2 and not install yet but i think u didn't completely load symbols(relative .nms file) to your softice

[sackpower]

Thank you guys for reply

@dMITR0: 'bpx myfunc' still responds with NO LTD

@freddy2002: 'u mytest!myfunc' is INVALID

@MagMag: I'm confused about loading symbols because I had no problem with SoftIce 3.1. The problem occurred after upgrading to SoftIce 3.2 and I don't know what different symbols I would have to load.

I'm using Windows 2000 and I think the best solution is to go back to SoftIce 3.1.

Sackpower

You can try to use another debugger such as OllyDbg/WinDBG/etc. just to see it works fine.

Or you can do the trick with 'int3' in SoftICE: in the beggining of your myfunc function use assembler directive '__asm int3' and enable SoftICE break on int3 by 'i3here ON'

Probably it could somehow help to break SI on your function start...