DSM- SIGSEGV signal read or write?

From: Daniel Kawer (dkawer_at_ic-itcr.ac.cr)
Date: 05/23/04

  • Next message: Kasper Dupont: "Re: DSM- SIGSEGV signal read or write?" 
    Date: 22 May 2004 15:08:40 -0700

    Im working on the development of a DSM. I have a problem when catching
    the SIGSEGV signal. I need to know if the signal was generated the
    program trying to read or to write to the page in question.

    I read somewhere that it could be done like this:

    void PageHandler(int signum, struct sigcontext_struct scs )
    {
    address = (int) scs.cr2;
    error = (scs.err & 2); // 1==write, 0==read
    …
    }

    but the variable never changes its value, no matter if its a read or
    write.

    Does anyone know a different/better way to approach this?

    Help will be aprecciated,
    Daniel Kawer
    Costa Rican Institute of Technology

  • Next message: Kasper Dupont: "Re: DSM- SIGSEGV signal read or write?"

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