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Write protect the bottom stack page?

  • 1.  Write protect the bottom stack page?

    Posted 05/05/14 11:10 AM

    Originally posted by: farmand


    Hi,

    I've a program where argv[0] gets apparently overwritten from time to time. This happens on a production machine which I cannot access and where we cannot use a debugger. In order to find the origin of this corruption, I'd like to write protect this stack page, so that any write access would be turned in a fault.

    The system is 64 bits based. When I try to invoke mprotect on my stack page, I get an ENOMEM error.  I'm using gcc to generate my program.

    On a Linux system (x86 based) I can set the protection using mprotect without trouble.

    Is there any way to achieve this on AIX. Or is this a hopeless attempt?

    Thanks for your help,

    François


    #AIX-Forum


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