exception vectors

Ingmar i2a at gmx.net
Mon Oct 31 11:35:49 EST 2005

Hi all,

I am trying to overwrite the exception vector space of an ibook G4 :).

I have set up (for every exception) a small piece of code, that's a prefix of a
handler to be called. My problem is, that writing the “small” chunks of code to
the exception vector space gives no problem(so it seams) but writing all the
pieces of code as one chunk gives a exception [dsi, dsisr 0x42000000], this
indicates a store problem.

I have tried different modes of copying, mmu on/off, also chanced the WING bit,
switched the exception prefix on.

I don't believe putting the exception vectors to there “place” one by one is the
right way, in the Linux kernel the kernel get relocated and the code comes into
place. I have taken this as an example, unfortunately to to result :(..

 - Am I overlooking something?
 - Is the a “standard way” to overwrite the exception vector space of a powerpc?


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