In article <199902071257.XAA12129@zen.quick.com.au> sjg@quick.com.au (Simon J. Gerraty) writes:
>An odd question perhaps.  I'm sort of trolling for ideas.
>
>I'm just starting out on porting Sun's JDK 1.2, and it appears to make
>_much_ heavier use of the ucontext_t related syscalls and functions
>than did JDK 1.1.x
>
>I'm currently wondering whether, rather than bash the JDK into working
>differently, I can provide what it wants to see.  I noted that there
>is a svr4_ucontext.h which provides a svr4_ucontext_t struct with the
>right members etc.  
>
>But is svr4_sys_context callable from the NetBSD emulation or there
>another means of populating this or a similar struct with the relevant
>info such that I can make a {get,set}context work.
>
>If I sound confused, its because I'm still trying to work out why the
>new JDK uses {get,set}context, as well as using {set,long}jmp() which
>is what we used in the 1.1 port... that is, the green_threads in the
>new JDK appears to work much like the BSD ports for JDK 1.1.x, yet at
>the same time, make much more use of {get,set}context (and I'm only
>loking at the green_threads stuff).
>
>I'm still running 1.3.x - I'd like the JDK to be able to run on
>that... mind you, 1.4 might be out before I finish this port :-)
>

Someone is working to provide get and set context calls for native netbsd.
In the meantime, you can add the svr4 ones to kern/syscall.master...

christos