[Bug translator/16914] probe syscall.* fails with compilation error

["dsmith at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16914

David Smith <dsmith at redhat dot com> changed:

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                 CC|                            |dsmith at redhat dot com

--- Comment #2 from David Smith <dsmith at redhat dot com> ---
(In reply to Martin Cermak from comment #0)
> Created attachment 7588 [details]
> stap output
> 
> On aarch64, stap -e 'probe syscall.* { log("hey!"); exit() }' returns errors
> like this:
> 
> /tmp/stapV76Au7/stap_19d2b02d95ec8b13d55cf356928e49ab_143230_src.c: In
> function ‘probe_2344’:
> /tmp/stapV76Au7/stap_19d2b02d95ec8b13d55cf356928e49ab_143230_src.c:11776:43:
> error: ‘__NR_compat_clone’ undeclared (first use in this function)
>        if ((((l->l___nr) != ((((int64_t) ( __NR_compat_clone ))))))) {

I understand what is going on here, but I need some aarch64 education to know
how to fix it. Does aarch64 run 32-bit executables? Is the CONFIG_COMPAT option
on on an aarch64 kernel?

If so, aarch64 will need its own section in runtime/linux/compat_unistd.h.

If not, something wacky is going on and that code should have never been hit.

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