Messages in this thread | | | Subject | Re: [PATCH] i386 & x86_64: Live Patching Funcion on 2.6.11.7 | From | Andi Kleen <> | Date | Sat, 23 Apr 2005 18:10:09 +0200 |
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"David S. Miller" <davem@davemloft.net> writes:
> Takashi-san, have you ever investigated using kprobes to > implement this feature? It seems a perfect fit, and would > allow support on several architectures other than just x86 > and x86_64. > > If kprobes does not meet your needs completely, it could > be trivially extended to do so.
kprobes would require an exception for each patchpoint because it uses an trap instruction.
Probably a bit too costly for commonly used functions. Especially on a P4 exceptions are quite costly.
But you could add lightweight kprobes that just use jmp for it in the kprobes framework, that might be useful for other stuff too
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