Hello,
I am developing a kernel module (called myModule);
I have errors when running it in the kernel log; and I want to know in
which line of my module exactly did this error occur.
in the kernel log I have:
...
...
myModule_ioctl+0x4b1/0x864
[<ffffffff8025c509>] ret_from_intr+0x0/0xa
<EOI> [<ffffffff8025f952>] copy_user_generic+0x9e/0x126
[<ffffffff8833fe78>] :myModule:myModule_ioctl+0x4b1/0x864
[<ffffffff802406be>] do_ioctl+0x55/0x6b
[<ffffffff80230101>] vfs_ioctl+0x256/0x26f
[<ffffffff8029f1a9>] sys_futex+0x103/0x121
[<ffffffff8024aec5>] sys_ioctl+0x59/0x78
[<ffffffff8025c00e>] system_call+0x7e/0x83
...
where myModule_ioctl is a method in myModule.
Can I know with GDB in which line of this method this happened ?
I tried to follow LDD3. I used the ./gdbline myModule
and got:
add-symbol-file 0xffffffff88329000 \
-s .bss 0xffffffff8832eb80 \
-s .data 0xffffffff8832c7c0 \
-s .exit.text 0xffffffff8832a8a0 \
-s .gnu.linkonce.this_module 0xffffffff8832c900 \
-s .init.text 0xffffffff880c5000 \
-s .note.gnu.build-id 0xffffffff8832a9dc \
-s .rodata 0xffffffff8832aa00 \
-s .rodata.str1.1 0xffffffff8832aae9 \
-s .smp_locks 0xffffffff8832b4e8 \
-s .strtab 0xffffffff8832c1a8 \
-s .symtab 0xffffffff8832b590 \
-s __param 0xffffffff8832b540
Then I ran:
gdb myModule.ko
and
add-symbol-file 0xffffffff88329000 \
-s .bss 0xffffffff8832eb80 \
-s .data 0xffffffff8832c7c0 \
and it was ok.
from the gdb prompt,
(gdb) print myModule_ioctl
gives:
$10 = {int (struct inode *, struct file *, unsigned int,
long unsigned int)} 0x9c7 <myModule_ioctl>
Now what should I do in order to know which line of code is:
myModule_ioctl+0x4b1/0x864?
Regards,
Ian
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