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Hello,

> Valgrind is a debugger completely in userspace. However it is closely
> tied to the kernel and the arch, hence some code reading of the kernel
> would definitely be required.
> Afaik, as part of the porting work,  it would be required to write
> wrapper code in valgrind for all system calls, among other things. The
> netbsd binary being debugged will have to be provided with an
> environment by valgrind to make it believe that its running on
> netbsd/i386.

Having an alternative to gdb sounds good to me. Any chance to support
something else than i386?

have fun
Michael

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