.TH CHECKOBJ 1
.UC
.SH NAME
checkobj \- check an object file to see whether it can be executed
.SH SYNTAX
.B checkobj
[
.B \-s
]
[
.B \-f
]
[
.B \-40
]
[ file ... ]
.SH DESCRIPTION
.I Checkobj
attempts to determine whether the named files are valid executable
binary files.
It checks for size restrictions, including those due to the granularity
of memory management on the PDP11.
It is especially useful for overlaid object files, where there are
a number of constraints.
If a file is too large or improperly laid out,
.I checkobj
attempts to point out format changes that would allow the program to run.
.SH OPTIONS
Several options control the checks:
.TP
.B \-\^s
Check for the use of separate I/D.
If the file is separate executable, an error is flagged,
and an appropriate way to load for a nonseparate machine is suggested
if possible.
.TP
.B \-\^f
Check for the use of floating point arithmetic without inclusion of
the floating-point interpreter.
.TP
.B \-\^40
Combine the
.B \-s
and
.B \-f
options, to check for suitability for an 11/40-class PDP11.
.SH BUGS
The test for floating point is simple-minded.
It is based on the definition of ``fltused'' by the C compiler
and ``fptrap'' in the floating-point simulator.
This test does not work if the object has been stripped.
.SH DIAGNOSTICS
The exit status is 0 if all named files are runnable with the
specified options, nonzero otherwise.
.SH AUTHOR
Mike Karels, University of California, Berkeley