Messages in this thread | | | Date | Tue, 5 Nov 2002 09:30:10 -0500 (EST) | From | Zwane Mwaikambo <> | Subject | Re: 2.5.45 odd deref in serial_in |
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On Tue, 5 Nov 2002, Russell King wrote:
> static _INLINE_ unsigned int serial_in(struct uart_8250_port *up, int offset) > { > offset <<= up->port.regshift; > > switch (up->port.iotype) { > > which also dereferences "up". So something may have corrupted %ebx > between executing that switch statement and executing the inb(). > > Could the NMI handler be corrupting %ebx ?
Yes that is highly likely, my current NMI handler does a fair amount of work, however it chains from the current default nmi handler, i thought register saving was already taken care of otherwise wouldn't i have all sorts of other strange bugs creeping up?
Zwane -- function.linuxpower.ca
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