Fwd: KLD: program.ko: depends of kernel - no avaiable

[John Baldwin]

On Wednesday 28 January 2009 10:40:20 am Jacky Oh wrote:
> hi everyone,
> 
> the main goal of KLD are load code for executing as part of kernel at
> run-time, so, i don't think that rebuild the kernel are a good solution..
> In other way a try to load any dev/syscall example at
> /usr/share/examples/kld the result was the same..
> When i was thinking in S. Sedov reply about the undefined symbols i go to
> run objdump for my syscall.ko and i can find the following:
> # objdump -x syscall.ko
> ...
> 000019d4 l     O .data    00000010 M_DIRP2_uninit_sys_uninit
> 0000094c l     O set_sysinit_set    00000004
> __set_sysinit_set_sym_M_DIRP2_init_sys_init
> 000019e4 l     O .data    00000010 M_DIRP2_init_sys_init
> 000019f4 l     O .data    0000000c syscall_mod
> 00001a00 l     O .data    0000000c _syscall_depend_on_kernel     <------
> 00001a20 l     O .data    00000028 syscall_syscall_mod
> 00001a48 l     O .data    00000004 offset
> ...
> The result whit the examples also shows the same symbol
> (_syscall_depend_on_kernel), so, y disassemble this function:
> 
> 00001a00 <_syscall_depend_on_kernel>:
>     1a00:    3c 35                    cmp    $0x35,%al
>     1a02:    0c 00                    or     $0x0,%al
>     1a04:    3c 35                    cmp    $0x35,%al
>     1a06:    0c 00                    or     $0x0,%al
>     1a08:    9f                          lahf
>     1a09:    bb 0d 00 00 00     mov    $0xd,%ebx
>     ...
> 
> lahf == load status flags (EFLAGS) on ah register
> 
> so, my question is, why precompiled modules (as if_ipw.ko, for example)
> don't show this function?

That is a MODULE_DEPEND() data structure, not a function.

-- 
John Baldwin