On Wed, Mar 22, 2000 at 08:04:37AM -0500, Daniel Eischen wrote:
>
> I had them implemented and working for i386, and even had a hacked up
> libc_r that used them instead of setjmp/longjmp. This was a few months
> ago under 4.0-current. At the time, I thought they'd be better off
> implemented as syscalls, but now I'm leaning towards library routines
> similar to setjmp/longjmp (which make a syscall to change the signal
> mask).
>
UNIX 98 specifies that setcontext should be callable from signal handlers.
http://www.opengroup.org/onlinepubs/007908799/xsh/getcontext.html
That pretty much means system calls. Doesn't it ?
I was wrong about this being necessary for the JDK. Linux doesn't implement
it either (it does have man pages and header files though!) and the JDK
runs fine on Linux. I was mislead by the some of these calls, which will
always fail on Linux.
-Arun
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