Date: Mon, 26 Mar 2012 13:53:25 -0400 From: John Baldwin <jhb@freebsd.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: freebsd-current@freebsd.org Subject: Re: general protection fault panic Message-ID: <201203261353.25138.jhb@freebsd.org> In-Reply-To: <20120326174155.GA1931@troutmask.apl.washington.edu> References: <20120323222313.GA1331@troutmask.apl.washington.edu> <201203261318.37373.jhb@freebsd.org> <20120326174155.GA1931@troutmask.apl.washington.edu>
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On Monday, March 26, 2012 1:41:55 pm Steve Kargl wrote: > On Mon, Mar 26, 2012 at 01:18:37PM -0400, John Baldwin wrote: > > On Monday, March 26, 2012 12:21:29 pm Steve Kargl wrote: > > > > You know your APIC ID is 0, so you should be able to find the IRQ for vector > > 51 from here in apic_idt_to_irq(): > > > > irq = lapics[apic_id].la_ioint_irqs[vector - APIC_IO_INTS]; > > > > Your apic_id is 0, and APIC_IO_INTS is 48, so you should be able to do this > > in kgdb: > > > > p lapics[0].la_ioint_irqs[3] > > > > That should give you an index, and intr_lookup_source() just does an array > > lookup. However, I'd be curious to see what the assembly looks like > > (x/10i $rip at this frame). > > > > > (kgdb) p lapics[0].la_ioint_irqs[3] > $1 = 16 > (kgdb) frame 27 > #27 0xffffffff806dc186 in acpi_cpu_c1 () > at /usr/src/sys/amd64/acpica/acpi_machdep.c:97 Sorry, I meant down at the frame that faulted (frame 7 in this case). -- John Baldwin
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