08-06-2008
i have heard that the BSD families are more "true" to the old unix core
not that i think is a good thing, but you specified "unix"
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CRASH(L) CRASH(L)
NAME
crash - analyze kernel dump or active system image
SYNOPSIS
crash [ aps ] [ -bdvtiz ] [ -s sfile ] [ -c cfile ] [ -u addr ]
DESCRIPTION
Synopsis of options -
-b Brief mode; skip general display of processes
-d Crash dump contains swap image. (default?)
-v Verbose; dump much information about each proc [future]
-t TTY structs to be dumpped
-i Incore inode table to be printed
-c FILE Provide non-standard file name for system image input
-s FILE Provide non-standard symboltable input
-u ADDR Trace a process other than currently selected one
-z Interrupt Trace displayed
aps Print PS & PC at time of interupt (doesn't do anything)
crash examines a dump of unix which it looks for in the file sysdump. It prints out the contents of the general registers, the kernel
stack and a traceback through the kernel stack. If an aps is specified, the ps and pc at time of interrupt are also printed out. The dump
of the stack commences from a "reasonable" address and all addresses are relocated to virtual addresses by using the value of kdsa6 found
in the dump.
The following options may be specified.
-b Brief mode; skip general display of processes. Only the currently selected process will be traced.
-c cfile
If the -c argument is found, the following argument is taken to be the name of a file containing the system image. The default is
"/usr/sys/core".
-s sfile
If the -s argument is found the following argument is taken to be the name of a file, containing a symbol table which should be used
in interpreting text addresses. The default is "/unix".
-u addr
Force a process to be displayed as if it were active when the crash occurred. addr is the octal address of the proc table entry.
FILES
/unix system namelist
/dev/swap swap device
/usr/sys/core core file
SEE ALSO
crash(8), adb(1), ps(1), rstat(1)
DIAGNOSTICS
Missing arg Unable to Open file Format Error in symbolfile
BUGS
Care should be used in running crash on "/dev/mem". Things can change while crash is running; the picture it gives is only a close approx-
imation to reality.
AUTHOR
Mike Muuss, JHU EE
John Stewart, Teledyne Geotech
March 1983 CRASH(L)