Re: [rvm-research] Inserting Assembly into Jikes

Claire Murphy <[email protected]> wrote on 10/23/2013 09:35:25 PM:
>
> My name is Claire, and I'm part of a team of students from Harvey
> Mudd College.
>
> We are working with Jikes RVM and need to insert a new assembly
> instruction directly into the host machine--similar to calling asm
> goto("(instruction)") in C. I've looked at the Jikes source code and
> I suspect the magic functions and the emit(instruction) functions in
> the Assembler file are what I'm looking for, but I'm unclear on how
> they work and whether they do what I want. Can you help?
>
> We literally want a faster equivalent of using JNI to insert C,
> which inserts assembly.
>

Hi,

	If a fast path from Java to C is what you are looking for, then the
quickest way to get it working is using VM.sysCall.  (Injects a call to a C
function that you write in the bootimage).

	See org.jikesrvm.runtime.SysCall.java and follow the pattern that is
there for the other sysCalls.

--dave

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