Kim write:
If you don't use driver as module, whenever you modify the driver you should compile the kernel.
(I think it's one of the reasons why module is used)
Maybe we can write programe controling simple hardware in user space not in kernel sapce.About KGDB ,does it need more device? Thanks.
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.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.
thanks.
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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@neowave.co.kr
==============================================
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