CORE(F) XENIX System V CORE(F)
Name
core - Format of core image file.
Description
XENIX writes out a core image of a terminated process when
any of various errors occur. See signal(S) 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'
working directory (provided it can be; normal access
controls apply). A process with an effective user ID
different from the real user ID will not produce a core
image.
The first section of the core image is a copy of the
system's per-user data for the process, including the
registers as they were at the time of the fault. The size
of this section depends on the parameter usize, which is
defined in /usr/include/sys/param.h. The remainder
represents the actual contents of the user's core area when
the core image was written. If the text segment is read-
only and shared, or separated from data space, it is not
dumped.
The format of the information in the first section is
described by the user structure of the system, defined in
/usr/include/sys/user.h. The locations of registers, are
outlined in /usr/include/sys/reg.h.
See Also
adb(CP), setuid(S), signal(S)
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