linux kernel - Undefined Instruction handler -

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i need handle undefined instruction exception in loadable kernel module. use register_undef_hook(&my_undef_hook) in module initialization. have such compile error:

... building modules, stage 2. modpost 1 modules warning: "register_undef_hook" [/home/user/my_driver.ko] undefined! warning: "unregister_undef_hook" [/home/user/my_driver.ko] undefined! ...

i wonder, can use these functions in kernel modules?

these functions not exported (aka, there no export_symbol(register_undef_hook)) not usable in modules code.

you have more details here


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