On Mon, Nov 22, 2010 at 12:06 PM, Nico Rittner <nritt...@cs.atlas-brb.de> wrote:
> immediately segfault with con0=tty:/dev/tty10
>
> Calling UML with con0=tty:/dev/tty10 immediately
> leads to segfault.
>
> uml : ~ $ bin/image initrd=bin/initrd init=/linuxrc mem=256M
> umid=app.dev.dpvw eth0=tuntap,,,192.168.178.21 con0=tty:/dev/tty9 con1=null
> con2=null con3=null con4=null con5=null con6=null con7=null con8=null
> con9=null con10=null con11=null con12=null root=/dev/ram0 realm=grw
> readonly=/dev/ubdb readwrite=/dev/ubdc ubdc=machines/app.dev.dpvw/ubdc
> ubda=machines/app.dev.dpvw/ubda ubdb=machines/app.dev.dpvw/ubdb
> Locating the bottom of the address space ... 0x1000
> Locating the top of the address space ... 0xc0000000
> Core dump limits :
> soft - 0
> hard - NONE
> Checking that ptrace can change system call numbers...OK
> Checking syscall emulation patch for ptrace...OK
> Checking advanced syscall emulation patch for ptrace...OK
> Checking for tmpfs mount on /dev/shm...nothing mounted on /dev/shm
> Checking PROT_EXEC mmap in /tmp/...OK
> Checking for the skas3 patch in the host:
> - /proc/mm...not found: No such file or directory
> - PTRACE_FAULTINFO...not found
> - PTRACE_LDT...not found
> UML running in SKAS0 mode
> Segmentation fault
> uml : ~ $
>
> Whenn changing con0 to 'null' or 'fd:0,fd:1'
> the segfault disappears and the uml is booting
> without problems. The user the UML runs
> under is member of the tty group and able to
> write to /dev/ttyXY.
> Both UML and Host source tree is 2.6.34-gentoo-r12
> from gentoo portage. uml config is attached.
>
> The last lines when running with strace are:
Can you please post the output of "strace ./linux con0=tty:/dev/tty9
... 2>&1 | grep tty9"
Does the problem also occur on the most current vanilla kernel?
> waitpid(19109, [{WIFSTOPPED(s) && WSTOPSIG(s) == 133}], WSTOPPED|__WALL) =
> 19109
> ptrace(PTRACE_GETREGS, 19109, 0, 0x17c59e04) = 0
> ptrace(PTRACE_SETREGS, 19109, 0, 0x17c59e04) = 0
> ptrace(0x1f /* PTRACE_??? */, 19109, 0, 0) = 0
> --- SIGCHLD (Child exited) @ 0 (0) ---
> waitpid(19109, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGSEGV}], WSTOPPED|__WALL)
> = 19109
> ptrace(PTRACE_GETREGS, 19109, 0, 0x17c59e04) = 0
> ptrace(PTRACE_GETFPXREGS, 19109, 0, 0x17c63d58) = 0
> ptrace(PTRACE_CONT, 19109, 0, SIGSEGV) = 0
> --- SIGCHLD (Child exited) @ 0 (0) ---
> waitpid(19109, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGTRAP}], WSTOPPED|__WALL)
> = 19109
> ptrace(PTRACE_SETFPXREGS, 19109, 0, 0x17c63d58) = 0
> ptrace(PTRACE_SETREGS, 19109, 0, 0x8253960) = 0
> ptrace(PTRACE_CONT, 19109, 0, SIG_0) = 0
> --- SIGCHLD (Child exited) @ 0 (0) ---
> waitpid(19109, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGTRAP}], WSTOPPED|__WALL)
> = 19109
> ptrace(PTRACE_SETREGS, 19109, 0, 0x17c59e04) = 0
> ptrace(0x1f /* PTRACE_??? */, 19109, 0, 0) = 0
> --- SIGCHLD (Child exited) @ 0 (0) ---
> waitpid(19109, [{WIFSTOPPED(s) && WSTOPSIG(s) == 133}], WSTOPPED|__WALL) =
> 19109
> ptrace(PTRACE_GETREGS, 19109, 0, 0x17c59e04) = 0
> rt_sigaction(SIGSEGV, {SIG_DFL, [SEGV], SA_RESTART}, {0x8070d30, [USR1
> VTALRM WINCH IO], SA_STACK|SA_NODEFER}, 8) = 0
> rt_sigaction(SIGTERM, {SIG_IGN, [TERM], SA_RESTART}, {0x806d5c0, [],
> SA_NODEFER|SA_RESETHAND}, 8) = 0
> kill(0, SIGTERM <unfinished ...>
>
>
> Further info:
> - gcc version 4.4.4 (Gentoo 4.4.4-r2 p1.2, pie-0.4.5)
> - GNU C Library stable release version 2.11.2
>
> How can i make uml work with ttys as console i/o?
>
>
> Thanks in advance!
>
> Nico
>
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--
Thanks,
//richard
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Beautiful is writing same markup. Internet Explorer 9 supports
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Spend less time writing and rewriting code and more time creating great
experiences on the web. Be a part of the beta today
http://p.sf.net/sfu/msIE9-sfdev2dev
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