Maybe we can write programe controling simple hardware in user space
not in kernel sapce.About KGDB ,does it need more device? Thanks.
-> KGDB uses just console for display printk output on target. After selecting
KGDB support on kernel configuration, place breakpoint() where you want to
begin debugging. Even in module you can use it. (I can't remember whether you
should export breakpoint symbol.) Notice that you should place breakpoint after
console initialized.
GDB in host will communicate with target with the serial target used for
console.
I still don't konw why after uncompressing kernel,it works noting.
But when I remove CONFIG_MODULES from config file,it works well again.
-> Actually, I don't know why it hangs. But how about checking whether the
symbols in no use are exported?
When
arch/ppc/mbxboot/head.s give the control to init/main.c ,it will
display LINUX_BANNER information,but it do noting,I think serial port must
works well.My bootloader is pSOS's.
-> if it hangs just after transmit on serial port, these banner may not
displayed. If you want to check kernel executes that command, how about use
test LED?
==============================================
Kwansuk Kim
Engineer, NeoWave Inc.
Tel +82-31-380-4927 Fax +82-31-380-4747
E-mail: kskim at neowave.co.kr
==============================================
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