sys
===

::

   NAME
     sys - system data

   SYNOPSIS
     sys [-c [name|number]] [-t] [-i] config

   DESCRIPTION
     This command displays system-specific data.  If no arguments are entered,
     the same system data shown during crash invocation is shown.

       -c [name|number]  If no name or number argument is entered, dump all
                         sys_call_table entries.  If a name string is entered,
                         search the table for all entries containing the string.
                         If a number is entered, the table entry associated with
                         that number is displayed.  If the current output radix
                         has been set to 16, the system call numbers will be 
                         displayed in hexadecimal.
       config            If the kernel was configured with CONFIG_IKCONFIG, then
                         dump the in-kernel configuration data.
       -t                Display kernel taint information.  If the "tainted_mask"
                         symbol exists, show its hexadecimal value and translate
                         each bit set to the symbolic letter of the taint type.
                         On older kernels with the "tainted" symbol, only its
                         hexadecimal value is shown.  The relevant kernel sources
                         should be consulted for the meaning of the letter(s) or
                         hexadecimal bit value(s).
       -panic            Panic a live system.  Requires write permission to
                         /dev/mem.  Results in the crash context causing an
                         "Attempted to kill the idle task!" panic.  (The dump
                         will indicate that the crash context has a PID of 0).
       -i                Dump the DMI string data if available in the kernel.

   EXAMPLES
     Display essential system information:

       crash> sys
             KERNEL: vmlinux.4
           DUMPFILE: lcore.cr.4
               CPUS: 4
               DATE: Mon Oct 11 18:48:55 1999
             UPTIME: 10 days, 14:14:39
       LOAD AVERAGE: 0.74, 0.23, 0.08
              TASKS: 77
           NODENAME: test.mclinux.com
            RELEASE: 2.2.5-15smp
            VERSION: #24 SMP Mon Oct 11 17:41:40 CDT 1999
            MACHINE: i686  (500 MHz)
             MEMORY: 1 GB

     Dump the system configuration data (if CONFIG_IKCONFIG):

       crash> sys config
       #
       # Automatically generated make config: don't edit
       # Linux kernel version: 2.6.16
       # Mon Apr 10 07:58:06 2006
       #
       CONFIG_X86_64=y
       CONFIG_64BIT=y
       CONFIG_X86=y
       CONFIG_SEMAPHORE_SLEEPERS=y
       CONFIG_MMU=y
       CONFIG_RWSEM_GENERIC_SPINLOCK=y
       CONFIG_GENERIC_CALIBRATE_DELAY=y
       CONFIG_X86_CMPXCHG=y
       CONFIG_EARLY_PRINTK=y
       CONFIG_GENERIC_ISA_DMA=y
       CONFIG_GENERIC_IOMAP=y
       CONFIG_ARCH_MAY_HAVE_PC_FDC=y
       CONFIG_DMI=y
       ...

     Display the kernel taint information, in this case where both the
     TAINT_WARN and TAINT_PROPRIETARY_MODULE bits have been set:

       crash> sys -t
       TAINTED_MASK: 201  PW

     Dump the system call table:

       crash> sys -c
       NUM  SYSTEM CALL                FILE AND LINE NUMBER
         0  sys_ni_syscall             ../kernel/sys.c: 48
         1  sys_exit                   ../kernel/exit.c: 404
         2  sys_fork                   ../arch/i386/kernel/process.c: 771
         3  sys_read                   ../fs/read_write.c: 117
         4  sys_write                  ../fs/read_write.c: 146
         5  sys_open                   ../fs/open.c: 754
         6  sys_close                  ../fs/open.c: 839
         7  sys_waitpid                ../kernel/exit.c: 503
         8  sys_creat                  ../fs/open.c: 789
         9  sys_link                   ../fs/namei.c: 1213
        10  sys_unlink                 ../fs/namei.c: 1074
        11  sys_execve                 ../arch/i386/kernel/process.c: 806
       ...

     Find the system call number of the select system call:

       crash> sys -c select
       NUM  SYSTEM CALL                FILE AND LINE NUMBER
        65  sys_select                 ../fs/select.c: 259

       If the current output radix has been set to 16, the system call numbers
       will be displayed in hexadecimal.

     Dump the DMI string data:

       crash> sys -i
               DMI_BIOS_VENDOR: LENOVO
              DMI_BIOS_VERSION: G4ET37WW (1.12 )
                 DMI_BIOS_DATE: 05/29/2012
                DMI_SYS_VENDOR: LENOVO
              DMI_PRODUCT_NAME: 2429BQ1
           DMI_PRODUCT_VERSION: ThinkPad T530
            DMI_PRODUCT_SERIAL: R9R91HZ
              DMI_PRODUCT_UUID: 568DFA01-5180-11CB-B851-BD06085ADDB0
              DMI_BOARD_VENDOR: LENOVO
                DMI_BOARD_NAME: 2429BQ1
             DMI_BOARD_VERSION: Not Available
              DMI_BOARD_SERIAL: 1ZLV127F17M
           DMI_BOARD_ASSET_TAG: Not Available
            DMI_CHASSIS_VENDOR: LENOVO
              DMI_CHASSIS_TYPE: 10
           DMI_CHASSIS_VERSION: Not Available
            DMI_CHASSIS_SERIAL: R9R91HZ
         DMI_CHASSIS_ASSET_TAG: RH0004111