That’s a possibility, but I would think there must be some assembly syntax to 
obtain the offset of a method of an interface function table.  When you look at 
the assembly generated the offsets are constants...  otherwise you need to 
perform multiple lookups to determine it - ruining the performance. If I 
hardcore the constant than any change to the interface breaks the assembly 
code, but I guess that’s the same for struct parameters and parameter order in 
general. 

> On Dec 15, 2018, at 8:12 AM, Jason E. Aten <j.e.a...@gmail.com> wrote:
> 
>> On Saturday, December 15, 2018 at 1:29:14 AM UTC-6, robert engels wrote:
>> Are there any examples of a hand-written assembly function that accepts an 
>> interface and then makes calls on the interface methods? 
>> 
>> In reviewing the documentation, it seems impossible, as the PCDATA, and 
>> FUNCDATA are not documented, and thus, I think the GC scanner ends up 
>> barfing when these are omitted. 
>> 
>> Although, since the interface is passed as a parameter, I would expect that 
>> the caller would retain the reference, so adding NO_LOCAL_POINTERS should 
>> suffice, but it is failing. 
>> 
>> Any help would be appreciated. Thanks.
> 
> I would try writing what I wanted to do using the `reflect` package, and then 
> looking at the disassembly of it. 
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