[Bug translator/13934] hand-written assembly SDT probes fail to parse

["jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13934

Josh Stone <jistone at redhat dot com> changed:

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                 CC|                            |jistone at redhat dot com

--- Comment #2 from Josh Stone <jistone at redhat dot com> 2012-04-01 19:33:49 UTC ---
(In reply to comment #1)
> Some more analysis:
> http://sourceware.org/ml/systemtap/2012-q2/msg00001.html

> For compiler-generated code, each argument will be of the form N@OP.
> For hand-written assembly, or for inline assembly in C or C++, the initial
> N@ may be missing. If N is present, it describes the size of the argument.
> [...] If N is omitted, the argument size is the natural size of the operand;
> usually this is the size of the register or the word size of the machine.
> In this case, the signedness is ambiguous.

Ugh, I didn't realize SDTv3 exempted assembly from N@OP, but indeed that's how
it plays out -- _SDT_ARGFMT is only defined in the !__ASSEMBLY__ case.  That
certainly complicates things... :(

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