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    SubjectRe: utrace comments
    On Mon, Apr 30, 2007 at 10:18:09AM +0100, Russell King wrote:
    > Roland's idea of single-stepping is that it *must* be supported by
    > hardware for utrace to use it. There are a number of architectures
    > which can only do single-stepping by modifying the text of the
    > program being single stepped. ARM is one such example.
    > As such, even when utrace is complete, some architectures will never
    > support in-kernel single step with utrace. I believe Roland's idea
    > is to have single step supported on these via some vapourware userspace
    > library.

    Does the current arm ptrace code support single stepping in kernelspace?
    If yes we absolutely need to continue to support it.

    > I'd also like to see utrace become *optional*
    > for architectures to support, rather than as it currently stands as
    > a *mandatory* requirement when merged.

    No way we'd keep both the old ptrace mess and utrace in the same tree.

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