Hello. I came upon a weird reboot in FreeBSD 5.0-RELEASE-p7 #0: Sun Apr 27 12:00:07 CEST 2003 i386 i have a small program: .text .global main main: movb $2, %al int $0x80 i do a gcc -o prog prog.S gcc (GCC) 3.2.1 [FreeBSD] 20021119 (release) GNU assembler 2.13.2 [FreeBSD] 2002-11-27 [both from FreeBSD] when i debug it with ald [ /usr/ports/devel/ald ] ... creep[/usr/ports/devel/ald]$ cat pkg-descr This is a port of ALD - the Assembly Language Debugger. It provides breakpoint debugging capabilities to those wishing to debug their assembly language programs. Currently, x86 platforms are supported. It was compiled on this release. .. as a normal user, I do ald ./prog break main run step step [here is the int $0x80 for a syscall] and poof. A reboot. when i compiled an almost GENERIC kernel ... creep[/sys/i386/conf]$ diff GENERIC OHBUGGER 25c25 < ident GENERIC --- > ident OHBUGGER 62,63c62,63 < #options DDB #Enable the kernel debugger < #options INVARIANTS #Enable calls of extra sanity checking --- > options DDB #Enable the kernel debugger > options INVARIANTS #Enable calls of extra sanity checking 65c65 < #options WITNESS #Enable checks to detect deadlocks and c ycles --- > options WITNESS #Enable checks to detect deadlocks and c ycles 142a143,146 > options SC_NORM_ATTR=(FG_WHITE|BG_BLACK) > options SC_NORM_REV_ATTR=(FG_BLACK|BG_LIGHTGREY) > options SC_KERNEL_CONS_ATTR=(FG_LIGHTRED|BG_BLACK) > options SC_HISTORY_SIZE=800 235a240,241 > device pcm ...and reproduce the event, it drops me to the DDB with this message: Stopped at sw1b+0xa9: movl %ecx,%fs:0 db> trace sw1b(2f,2f,2f,bfbffa54,bfbffa5c) at sw1b+0xa9 fork_trampoline() at fork_trampoline --- trap 0xa, eip = 0x80484a0, esp = 0xbfbffa2c, ebp = 0xbfbffa2c --- when i issue a 'cont' i the debugger continues and everything seems going normal, but on a system with debugging turned off This is my custom kernel: ---------------------------------------- machine i386 cpu I686_CPU ident NIGDY maxusers 0 options INET #InterNETworking options INET6 #IPv6 communications protocols options FFS #Berkeley Fast Filesystem options SOFTUPDATES #Enable FFS soft updates support options UFS_ACL #Support for access control lists options UFS_DIRHASH #Improve performance on big directories options MD_ROOT #MD is a potential root device options NFSCLIENT #Network Filesystem Client options NFSSERVER #Network Filesystem Server options EXT2FS options MSDOSFS #MSDOS Filesystem options CD9660 #ISO 9660 Filesystem options PROCFS #Process filesystem (requires PSEUDOFS) options PSEUDOFS #Pseudo-filesystem framework options NULLFS options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!] options COMPAT_FREEBSD4 #Compatible with FreeBSD4 options SCSI_DELAY=0 #Delay (in ms) before probing SCSI options KTRACE #ktrace(1) support options SYSVSHM #SYSV-style shared memory options SYSVMSG #SYSV-style message queues options SYSVSEM #SYSV-style semaphores options _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions options KBD_INSTALL_CDEV # install a CDEV entry in /dev options IPFIREWALL options IPFIREWALL_DEFAULT_TO_ACCEPT options IPV6FIREWALL #firewall for IPv6 options IPV6FIREWALL_DEFAULT_TO_ACCEPT device isa device pci device smbus # Bus support, required for smb below. device intpm # power menage device iicbus device iicbb device smb device fdc device ata device atadisk # ATA disk drives device atapicd # ATAPI CDROM drives device atapifd # ATAPI floppy drives device atapist # ATAPI tape drives options ATA_STATIC_ID #Static device numbering device atkbdc # AT keyboard controller device atkbd # AT keyboard device psm # PS/2 mouse device vga # VGA video card driver device splash # Splash screen and screen saver support device sc options SC_NORM_ATTR=(FG_WHITE|BG_BLACK) options SC_NORM_REV_ATTR=(FG_BLACK|BG_LIGHTGREY) options SC_KERNEL_CONS_ATTR=(FG_LIGHTRED|BG_BLACK) options SC_HISTORY_SIZE=800 device agp # support several AGP chipsets device npx device apm hint.apm.0.flags="0x20" device pmtimer device sio # 8250, 16[45]50 based serial ports device ppc device ppbus # Parallel port bus (required) device lpt # Printer device plip # TCP/IP over parallel device ppi # Parallel port interface device device miibus # MII bus support device rl # RealTek 8129/8139 device random # Entropy device device loop # Network loopback device ether # Ethernet support device sl # Kernel SLIP device ppp # Kernel PPP device tun # Packet tunnel. device pty # Pseudo-ttys (telnet etc) device md # Memory "disks" device gif # IPv6 and IPv4 tunneling device faith # IPv6-to-IPv4 relaying (translation) device snp device bpf # Berkeley packet filter device pcm device uhci # UHCI PCI->USB interface device ohci # OHCI PCI->USB interface device usb # USB Bus (required) device ugen # Generic device uhid # "Human Interface Devices" device ukbd # Keyboard device ulpt # Printer ------------------------------------- The dmesg output is as follows: Copyright (c) 1992-2003 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.0-RELEASE-p7 #0: Sun Apr 27 12:00:07 CEST 2003 root_at_mistress:/usr/src/sys/i386/compile/NIGDY Preloaded elf kernel "/boot/kernel/kernel" at 0xc0611000. Preloaded elf module "/boot/kernel/linux.ko" at 0xc06110a8. Preloaded elf module "/boot/kernel/nvidia.ko" at 0xc0611154. Timecounter "i8254" frequency 1193182 Hz CPU: Pentium III/Pentium III Xeon/Celeron (601.37-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x683 Stepping = 3 Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE> real memory = 134217728 (128 MB) avail memory = 123813888 (118 MB) Initializing GEOMetry subsystem Pentium Pro MTRR support enabled npx0: <math processor> on motherboard npx0: INT 16 interface Using $PIR table, 9 entries at 0xc00fde70 apm0: <APM BIOS> on motherboard apm0: found APM BIOS v1.2, connected at v1.2 pcib0: <Intel 82443BX (440 BX) host to PCI bridge> at pcibus 0 on motherboard pci0: <PCI bus> on pcib0 agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xd8000000-0xdbffffff at device 0.0 on pci0 pcib1: <PCIBIOS PCI-PCI bridge> at device 1.0 on pci0 pci1: <PCI bus> on pcib1 nvidia0: <GeForce2 MX/MX 400> mem 0xd0000000-0xd7ffffff,0xdc000000-0xdcffffff irq 10 at device 0.0 on pci1 isab0: <PCI-ISA bridge> at device 7.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <Intel PIIX4 ATA33 controller> port 0xf000-0xf00f at device 7.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xc000-0xc01f irq 9 at device 7.2 on pci0 usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0 usb0: USB revision 1.0 uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered ugen0: OmniVision OV511+ Camera, rev 1.00/1.00, addr 2 ulpt0: Hewlett-Packard DeskJet 840C, rev 1.00/1.00, addr 3, iclass 7/1 ulpt0: using bi-directional mode intpm0: <Intel 82371AB Power management controller> port 0x5000-0x500f irq 9 at device 7.3 on pci0 intpm0: I/O mapped 5000 intpm0: intr IRQ 9 enabled revision 0 smbus0: <System Management Bus> on intsmb0 smb0: <SMBus generic I/O> on smbus0 intpm0: PM I/O mapped 4000 pci0: <simple comms, UART> at device 11.0 (no driver attached) rl0: <RealTek 8139 10/100BaseTX> port 0xc400-0xc4ff mem 0xdf010000-0xdf0100ff irq 11 at device 13.0 on pci0 rl0: Realtek 8139B detected. Warning, this may be unstable in autoselect mode rl0: Ethernet address: 00:02:44:29:5e:d3 miibus0: <MII bus> on rl0 rlphy0: <RealTek internal media interface> on miibus0 rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto pcm0: <Creative EMU10K1> port 0xc800-0xc81f irq 5 at device 15.0 on pci0 atapci1: <HighPoint HPT370 ATA100 controller> port 0xe000-0xe0ff,0xdc00-0xdc03,0xd800-0xd807,0xd400-0xd403,0xd000-0xd007 irq 11 at device 19.0 on pci0 ata2: at 0xd000 on atapci1 ata3: at 0xd800 on atapci1 orm0: <Option ROM> at iomem 0xc0000-0xcb7ff on isa0 pmtimer0 on isa0 atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0 atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 psm0: <PS/2 Mouse> irq 12 on atkbdc0 psm0: model MouseMan+, device ID 0 fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0 ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode plip0: <PLIP network interface> on ppbus0 lpt0: <Printer> on ppbus0 lpt0: Interrupt-driven port ppi0: <Parallel I/O> on ppbus0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1 at port 0x2f8-0x2ff irq 3 on isa0 sio1: type 16550A vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 unknown: <PNP0303> can't assign resources (port) unknown: <PNP0a03> can't assign resources (port) unknown: <PNP0f13> can't assign resources (irq) unknown: <PNP0501> can't assign resources (port) unknown: <PNP0700> can't assign resources (port) unknown: <PNP0400> can't assign resources (port) unknown: <PNP0501> can't assign resources (port) Timecounters tick every 10.000 msec ipfw2 initialized, divert disabled, rule-based forwarding enabled, default to accept, logging disabled IPv6 packet filtering initialized, default to accept, logging disabled ad4: 38166MB <WDC WD400BB-00DEA0> [77545/16/63] at ata2-master UDMA100 ad5: 12949MB <IBM-DJNA-371350> [26310/16/63] at ata2-slave UDMA66 acd0: CD-RW <CR-4802TE> at ata0-master PIO3 acd1: CDROM <TOSHIBA CD-ROM XM-6702B> at ata0-slave PIO4 MBREXT Slice 5 on ad4s4: 0000 00 0f ff ff 83 0f ff ff 3f 00 00 00 91 01 a0 00 |........?.......| [0] f:00 typ:131 s(CHS):255/15/255 e(CHS):255/15/255 s:63 l:10486161 0000 00 0f ff ff 05 0f ff ff d0 01 a0 00 a0 03 40 01 |.............._at_.| [1] f:00 typ:5 s(CHS):255/15/255 e(CHS):255/15/255 s:10486224 l:20972448 MBREXT Slice 6 on ad4s4: 0000 00 0f ff ff a5 0f ff ff 3f 00 00 00 61 03 40 01 |........?...a._at_.| [0] f:00 typ:165 s(CHS):255/15/255 e(CHS):255/15/255 s:63 l:20972385 0000 00 0f ff ff 05 0f ff ff 70 05 e0 01 90 dd 26 02 |........p.....&.| [1] f:00 typ:5 s(CHS):255/15/255 e(CHS):255/15/255 s:31458672 l:36101520 MBREXT Slice 7 on ad4s4: 0000 00 0f ff ff 0b 0f ff ff 3f 00 00 00 51 dd 26 02 |........?...Q.&.| [0] f:00 typ:11 s(CHS):255/15/255 e(CHS):255/15/255 s:63 l:36101457 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| [1] f:00 typ:0 s(CHS):0/0/0 e(CHS):0/0/0 s:0 l:0 Mounting root from ufs:/dev/ad4s3c ----------------------------------------- Note: when testing with 'almost GENERIC' kernel, i checked without nvidia.ko module. I know i have ugly MBREXT warnings but it's propably not their fault and i'm still not sure how to get rid of them ;( best regards to almighty freebsd hackers, -- ... creep ......... yes LoL | tr -u '\n' ' 'Received on Tue May 13 2003 - 06:42:51 UTC
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