Re: [9fans] updating 9vx's Plan 9 install

[erik quanstrom <quanstro@quanstro.net>]

On Fri May  6 23:55:38 EDT 2011, fusion@storytotell.org wrote:
>
> On May 6, 2011, at 11:31 AM, Anthony Sorace wrote:
>
> > In addition to the tree Andrey noted, the general
> > answer is simply to download the normal distribution
> > image and use that. The effect is the same as using
> > the tree Andrey pointed to and updating, but you'll
> > save yourself time and work by just grabbing the
> > current image.
> >
> > http://plan9.bell-labs.com/plan9/download/plan9.iso.bz2
> >
> > just mount the image and copy the contents to
> > wherever you'd like your 9vx root to live, and point
> > 9vx at that.
> >
>
>
> That didn't work. Rio doesn't live long; you create a window and then get this:
>
> invalid opcode f0 0f b1 at eip 00013f3b
> invalid opcode f0 0f b1 at eip 00020dc2

looks like your 9vx itself is confused, not rio.  that's a lock; cmpxchg.

; 9fs sources
post...
; acid /n/sources/plan9/386/bin/rio
/n/sources/plan9/386/bin/rio:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: src(0x20dc2)
/sys/src/libc/386/atom.s:8
 3	ainclp:
 4		MOVL	(BX), AX
 5		MOVL	AX, CX
 6		INCL	CX
 7		LOCK
>8		BYTE	$0x0F; BYTE $0xB1; BYTE $0x0B	/* CMPXCHGL CX, (BX) */
 9		JNZ	ainclp
 10		MOVL	CX, AX
 11		RET
 12

- erik