On Tue, Jan 04, 2000 at 09:06:14AM +0000, Alex wrote:
> Today's -current:
>
> Copyright (c) 1992-2000 The FreeBSD Project.
> Copyright (c) 1982, 1986, 1989, 1991, 1993
> The Regents of the University of California. All rights
> reserved.
> FreeBSD 4.0-CURRENT #21: Tue Jan 4 08:00:34 GMT 2000
> Timecounter "i8254" frequency 1193182 Hz
> CPU: AMD-K6(tm) 3D processor (333.35-MHz 586-class CPU)
> Origin = "AuthenticAMD" Id = 0x58c Stepping = 12
> Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
> AMD Features=0x80000800<SYSCALL,3DNow!>
> real memory = 134217728 (131072K bytes)
> avail memory = 126709760 (123740K bytes)
> Preloaded elf kernel "kernel.test" at 0xc02e2000.
> VESA: v2.0, 4096k memory, flags:0x0, mode table:0xc0294fa0 (1000040)
> VESA: CHIPS 6x555 Super VGA
> npx0: <math processor> on motherboard
> npx0: INT 16 interface
> apm0: <APM BIOS> on motherboard
> apm: found APM BIOS v1.2, connected at v1.2
> pcib0: <Host to PCI bridge> on motherboard
> pci0: <PCI bus> on pcib0
> isab0: <Intel 82371AB PCI to ISA bridge> at device 1.0 on pci0
> isa0: <ISA bus> on isab0
> ata-pci0: <Intel PIIX4 ATA-33 controller> at device 1.1 on pci0
> ata-pci0: Busmastering DMA supported
> ata0 at 0x01f0 irq 14 on ata-pci0
> ata1 at 0x0170 irq 15 on ata-pci0
> pci0: Intel 82371AB/EB (PIIX4) USB controller (vendor=0x8086,
> dev=0x7112) at 1.2
> chip1: <Intel 82371AB Power management controller> at device 1.3 on pci0
> vga-pci0: <Chips & Technologies model 00e5 VGA-compatible display
> device> at device 6.0 on pci0
> pcic-pci0: <TI PCI-1131 PCI-CardBus Bridge> at device 7.0 on pci0
> pcic-pci1: <TI PCI-1131 PCI-CardBus Bridge> at device 7.1 on pci0
> fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f7 irq 6 drq 2 on isa0
> fdc0: FIFO enabled, 8 bytes threshold
> fd0: <1440-KB 3.5" drive> on fdc0 drive 0
> atkbdc0: <keyboard controller (i8042)> at port 0x60-0x6f on isa0
> atkbd0: <AT Keyboard> irq 1 on atkbdc0
> psm0: <PS/2 Mouse> irq 12 on atkbdc0
> psm0: model Generic PS/2 mouse, device ID 0
> vga0: <Generic ISA VGA> at port 0x3b0-0x3df iomem 0xa0000-0xbffff on
> isa0
> sc0: <System console> on isa0
> sc0: VGA <16 virtual consoles, flags=0x200>
> pcic0: <VLSI 82C146> at irq 10 on isa0
> pccard0: <PC Card bus -- kludge version> on pcic0
> pccard1: <PC Card bus -- kludge version> on pcic0
> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
> sio0: type 16550A
> sio1: not probed (disabled)
> sio2: configured irq 3 not in bitmap of probed irqs 0
> sio2 at port 0x3e8-0x3ef irq 3 on isa0
> sio2: type 16550A
> ppc0 at port 0x378-0x37f irq 7 flags 0x40 on isa0
> ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
> plip0: <PLIP network interface> on ppbus 0
> lpt0: <generic printer> on ppbus 0
> lpt0: Interrupt-driven port
> ppi0: <generic parallel i/o> on ppbus 0
> pcm0: <CS4231> at port 0x530-0x537,0x538-0x539 irq 5 drq 1 flags 0xa110
> on isa0
>
>
> Fatal trap 12: page fault while in kernel mode
> fault virtual address = 0xbff21000
> fault code = supervisor read, page not present
> instruction pointer = 0x8:0xc0214ffe
> stack pointer = 0x10:0xc02f6b58
> frame pointer = 0x10:0xc02f6b8c
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, def32 1, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 0 (swapper)
> interrupt mask = net tty bio cam
> trap number = 12
> panic: page fault
> Uptime: 0s
> Automatic reboot in 15 seconds - press a key on the console to abort
>
>
> % nm /kernel.test | grep c0214f
> c0214f68 T bus_dmamap_load
> c0214f28 T bus_dmamem_free
>
>
> Would you like to know more?
>
>
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I got exactly this from compiling a kernel (accidentally) with the
development port of GCC. I am not sure if the same feature exists with
the latest GCC imported into the tree, but as of two days ago it didn't.
I am currently doing a make world on a spare machine to check it with
the latest compiler.
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