What's wrong with my kernel debugging?

What's wrong with my kernel debugging?

[Wojciech Kromer]

I'm trying to debug kernel module on remote PPC machine.
Say me if I'm doing something wrong.

I had fonud 0xc303b04c address using loadmodule.sh script


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(gdb) target remote /dev/ttyS0
Remote debugging using /dev/ttyS0
0xc000aff8 in ?? ()
(gdb) add-symbol-file /lib/modules/vtxcsmod 0xc303b04c
add symbol table from file "/lib/modules/vtxcsmod" at
        .text_addr = 0xc303b04c
(y or n) y
Reading symbols from /lib/modules/vtxcsmod...done.
(gdb) b init_module
Breakpoint 1 at 0xc30aba20: file vtxcs_mod.c, line 93.
(gdb) continue
Continuing.
warning: Cannot insert breakpoint 1:
Cannot access memory at address 0xc30aba20
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ why ???




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