core(4)

NAME
     core - format of core image file

SYNOPSIS
     #include <core.out.h>

DESCRIPTION
     The IRIX system writes out a core image of a terminated process when any
     of various errors occur.  See signal(2) for the list of reasons; the most
     common are memory violations, illegal instructions, bus errors, and
     user-generated quit signals.  The core image is called core and is
     written in the process's working directory (provided it can be; normal
     access controls apply).  A process with an effective user ID different
     from the real user ID does not produce a core image.

     The format of the core image is defined by <core.out.h>.  It consists of
     a header, maps, descriptors, and section data.

     The header data includes the process name (as in ps(1)), the signal that
     caused the core dump, the descriptor array, and the corefile location of
     the map array.

     Each descriptor defines the length of useful process data.  One
     descriptor defines the general-purpose registers at the time of the core
     dump for example.  The data is present in the core image at the file
     location given in the descriptor only if the IVALID flag is set in the
     descriptor.

     Each map defines the virtual address and length of a section of the
     process at the time of the core dump.  The data is present in the core
     image at the file location given in the descriptor only if the VDUMPED
     flag is set in the map.  The process's stack and data sections are
     normally written in the core image.  The process's text is not normally
     written in the core image.

NOTE
     Core image format designed by Silicon Graphics, Inc.

SEE ALSO
     dbx(1), ps(1), setuid(2), signal(2).