In message <
, Jeremie Le Hen writes:
> On Mon, Dec 21, 2015 at 12:57 AM, Adrian Chadd <> wrote
> :
> > can you copy/paste the file:line that each of those stackframes represents?
> >
> > I may have an idea or two..
> Sure here we go:
> (kgdb) list *vesa_configure+0x270
> 0xffffffff80b25cd0 is in vesa_configure (/usr/src-svn/sys/dev/fb/vesa.c:827).
> (kgdb) list *vga_init+0x65
> 0xffffffff80b286e5 is in vga_init (/usr/src-svn/sys/dev/fb/vga.c:1402).
> (kgdb) list *isavga_attach+0x92
> 0xffffffff80b9afd2 is in isavga_attach (/usr/src-svn/sys/isa/vga_isa.c:224).

Here is what I see. Only happens on real hardware (not VirtualBox VMs).

uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
uart0: console (9600,n,8,1)
acpi_alloc_wakeup_handler: can't alloc wake memory
orm0: <ISA Option ROM> at iomem 0xc0000-0xcc7ff on isa0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x0
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0xffffffff80bb7284
stack pointer           = 0x28:0xffffffff81e4f960
frame pointer           = 0x28:0xffffffff81e4f970
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 (swapper)
trap number             = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 
vpanic() at vpanic+0x182/frame 0xffffffff81e4f570
panic() at panic+0x43/frame 0xffffffff81e4f5d0
trap_fatal() at trap_fatal+0x351/frame 0xffffffff81e4f630
trap_pfault() at trap_pfault+0x1e4/frame 0xffffffff81e4f690
trap() at trap+0x46e/frame 0xffffffff81e4f8a0
calltrap() at calltrap+0x8/frame 0xffffffff81e4f8a0
--- trap 0xc, rip = 0xffffffff80bb7284, rsp = 0xffffffff81e4f970, rbp = 
0xffffffff81e4f970 ---
bcopy() at bcopy+0x24/frame 0xffffffff81e4f970
vesa_configure() at vesa_configure+0x270/frame 0xffffffff81e4fb60
vga_init() at vga_init+0x65/frame 0xffffffff81e4fb80
isavga_attach() at isavga_attach+0x92/frame 0xffffffff81e4fbc0
device_attach() at device_attach+0x420/frame 0xffffffff81e4fc20
isa_probe_children() at isa_probe_children+0x211/frame 0xffffffff81e4fc90
mi_startup() at mi_startup+0x108/frame 0xffffffff81e4fcb0
btext() at btext+0x2c
Uptime: 1s
acpi0: reset failed - timeout
Automatic reboot in 15 seconds - press a key on the console to abort

It's getting late here. I'll try digging around tomorrow.

Cy Schubert <> or <>
FreeBSD UNIX:  <>   Web:

        The need of the many outweighs the greed of the few.

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