[9fans] wierd kw errata?

[9fans] wierd kw errata?

[erik quanstrom]

i finally got some traction on the plumbing problem
i've been seeing on kw.  but now i'm stumped.

perhaps there is something obvious that i am missing.
here's the original problem.  this only is observable on kw,
as far as i know:
	mkdir /tmp/2.6 && cd /tmp && acme
	b3 on 2.6, directory does not open.
in /sys/src/cmd/acme/look.c:/^look3.c if i add
	fn1("");
right before Return:, the problem goes away.  if i
add
	fn0();
the problem remains.  the definitions are
	void
	fn0(void)
	{
	}

	void
	fn1(char*)
	{
	}
i think i've ruled out a timing or proc restore problem
because a call to sleep(100) from fn0 doesn't change
anything.

but this is really a strange problem, since openfile()
should have already run!  somehow code run later
seems to change the result.

the assembly in question is (works)
	look3+0x2dc 0x0001265c	BL	openfile
	look3+0x2e0 0x00012660	MOVW	$#0x471b1,R0
	look3+0x2e4 0x00012664	BL	fn1
	look3+0x2e8 0x00012668	B	look3+0x1b0
or (doesn't work)
	look3+0x2dc 0x0001265c	BL	openfile
	look3+0x2e0 0x00012660	BL	fn0
	look3+0x2e4 0x00012664	B	look3+0x1b0

ideas?

- erik