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    SubjectRe: [uClinux-dev] [PATCH/RFC] FDPIC: add hook for arches to customize program header parsing
    Date
    Jie Zhang <jie.zhang@analog.com> wrote:

    > > There needs to be a mapping covering the SRAM region for the purposes of the
    >
    > Our GDB is still lack of the feature to debug applications using SRAM. So this
    > part of code was not got exercised. So if we remove this line, can this patch
    > got merged?

    No. Firstly, the piece of storage that gets munmapped isn't used, so unmapping
    it isn't wrong. What you need to do is to put a mapping over the bit of the
    SRAM you wish to use and then fill it and use it. Ideally, you'd do this
    inside of do_mmap_pgoff() - that way those bits of the SRAM can be shared, but
    I'm not sure how best to do that.

    But you need to stick a VMA over it so that various checks don't spit
    EFAULT/EIO at you.

    David


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