core man page on Ultrix

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core(5)								       core(5)

Name
       core - format of memory image file

Syntax
       #include <machine/param.h>

Description
       The  ULTRIX  system  writes  out a memory image of a terminated process
       when any of various errors occur.  See for the list  of	reasons.   The
       most  common  reasons  are memory violations, illegal instructions, bus
       errors, and user-generated quit signals.	 The memory  image  is	called
       and  is written in the process's working directory, provided it can be,
       and normal access controls apply.

       The maximum size of a file is limited by Files  that  would  be	larger
       than the limit are not created.

       The  core  file	consists  of  the  u.	area, whose size (in pages) is
       defined by the UPAGES manifest in the < machine/param.h > file.	The u.
       area  starts  with  a  user  structure  as  given in <sys/user.h>.  The
       remainder of the core file consists first of the data  pages  and  then
       the  stack  pages of the process image.	The amount of data space image
       in the core file is given (in pages) by the variable u_dsize in the  u.
       area.   The  amount of stack image in the core file is given (in pages)
       by the variable u_ssize in the u.  area.

       In general, the debugger is sufficient to deal with core images.

See Also
       adb(1), dbx(1), setrlimit(2), sigvec(2)

				      VAX			       core(5)
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