Re: Memory Management during Program Loading

From: Sreeni (sreeni.pulichi_at_gmail.com)
Date: 06/28/05

  • Next message: Andy Isaacson: "Re: wrong madvise(MADV_DONTNEED) semantic" 
    Date:	Tue, 28 Jun 2005 14:12:43 -0400
To: "Valdis.Kletnieks@vt.edu" <Valdis.Kletnieks@vt.edu>

    Thanks you Valdis for your reply.

    We have a "Bus Monitor hardware" which monitors and polices the bus at
    the specified physical address.

    Basically we need to run "secure" program under the supervision of the
    Bus monitor hardware.

    Kernel can see the "secure" memory region, and kernel is reponsible for enabling
    the "Bus monitor Hardware".

    Thanks,
    Sreeni

    On 6/28/05, Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> wrote:
    > On Tue, 28 Jun 2005 13:49:46 EDT, Sreeni said:
    > > In our system we have a secure physical memory starting and ending at
    > > predefined addresses. We want to execute certain programs, which have
    > > to be running secure in those address spaces only.
    >
    > Can you explain how this memory is "secure", and how you expect a kernel that's
    > running *outside* this secure space to load a program into it?
    >
    > > Is it possible to force the loader to load the "particular" program
    > > (both the code and data segment) at that pre-defined secure physical
    > > memory, without any major kernel changes?
    >
    > It's more complicated than that - not only do you need to worry about running
    > the program in that space, you also need to worry about things like malloc()
    > space for the program, I/O buffers, and so on.....
    >
    >
    > 

    -- 
~Sreeni
       -iDream
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