Strange, I get kernel panic when i get the address from System.map.
The address is rather to the low side, I am not sure if this address
can be "used" but when I used the symbol address from /proc/ksyms,
I am able to overwrite the syscall, and it works! :-)
Eugene
<quote sender="Eugene Teo">
> Hi guys,
>
> I would like to check up the address of sys_mkdir in System.map.
> But in UML, we do not have /boot. I can get it from System.map
> in the UML kernel, but whenever I try to assign the address to
> the function pointer, it will give a kernel panic. Is there an
> issue where I can't overwrite the address of a syscall function
> pointer?
>
> Also, what is the different between the address in System.map
> and /proc/ksyms?
>
> Thanks.
>
> Eugene
> --
> Eugene TEO @ Linux Users Group, Singapore <eugeneteo@lugs.org.sg>
> GPG FP: D851 4574 E357 469C D308 A01E 7321 A38A 14A0 DDE5
> main(i){putchar(182623909>>(i-1)*5&31|!!(i<7)<<6)&&main(++i);}
>
--
Eugene TEO @ Linux Users Group, Singapore <eugeneteo@lugs.org.sg>
GPG FP: D851 4574 E357 469C D308 A01E 7321 A38A 14A0 DDE5
main(i){putchar(182623909>>(i-1)*5&31|!!(i<7)<<6)&&main(++i);}
--
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