Kernel Debugging

[Daniel O'Connor]

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On Wed, 18 Aug 2004 15:41, Dennis George wrote:
> I am studying the kernel source of FreeBSD. I like to know the flow of
> packets from NIC to different modules of Kernel and then to the
> user-level. I studied the code and identified some of the functions through
> which the kernel handles network packets..... But I want to check from
> where the control goes to that function.......
>
> So I decided to debug the kernel.... since I have only one machine I am
> not checking for kgdb.... I decided to work with DDB so compiled the
> kernel with option DDB and with debugging enabled (-g option). After
> installing the new kernel I rebooted the system and in the boot prompt I
> gave "-d" option to  enter the debugging module..... My problem is that I
> can't provide any breakpoints with this method... It gives me error
> saying "symbol not found".....  Can anybody tell me where is the
> problem................

Maybe you should try vmware then you can pretend you have 2 machines :)

Not sure how to answer your actual question though.

- -- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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