Problem with kgdb debugger

Problem with kgdb debugger

Post by Saurabh Des » Sun, 28 Sep 1997 04:00:00

I compiled the kernel using -g option in /usr/src/linux/Makefile and
ran kgdb. It gives me following messages before coming to (gdb) prompt.
   Reading symbols from /usr/src/linux/vmlinux... 0x0 in ??() loading
   /lib/modules/2.0.27/misc/kdebug.0... /tmp/kgdb.104:14:Error in source
                        command file:
   /kdebug.o.text: No such file or directory
When I issue a command:
(gdb) call printk(linux_banner)
It gives a flurry of messages such as:
   Unable to handle kernel paging request at virtual address c11aa5c4
   (some more messages)
   EIP : 0010:[<01823244>]
   (some more messages)
   kdebug: device or resource busy

After this, it comes back to prompt. I tried checking EIP value in
vmlinux using "nm vmlinux | sort \less", but it does not have an entry
in it.

Question: Is the problem with the configuration of the kernel or is
there an illegal pointer somewhere in the source file? (by the way, I
have not changed any source file).

I would appreciate any help in this matter.


1. problem executing 'kgdb' debugger

        Hi pal!  Thank you for your time.
- I compiled the kernel using -g option.
- Built the kdebug module by running
        - make config
        - make all
- Installed kdebug module by
        - make install

When I execute kgdb, it gives me following error messages.

        Reading symbols from /usr/src/linux/vmlinux...
        0x0 in ?? ()
        loading ./kdebug.o...
        warning: No loadable sections found in added symbol-file
        warning: Lowest section in / is .data at 0x0
        /tmp/kgdb.402:17: Error in sourced command file:
        /kdebug.o.rodata: No such file or directory

I am using Red Hat Linux 4.2; kernel 2.0.30. The kgdb version is 1.8

I would appreciate any assistance on this matter.
thank you

saurabh desai

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