checkobj(1) [bsd man page]

CHECKOBJ(1)						      General Commands Manual						       CHECKOBJ(1)

NAME

       checkobj - check an object file to see whether it can be executed

SYNTAX

       checkobj [ -s ] [ -f ] [ -40 ] [ file ... ]

DESCRIPTION

       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, checkobj attempts to point out format changes that would allow the program to
       run.

OPTIONS

       Several options control the checks:

       -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.

       -f     Check for the use of floating point arithmetic without inclusion of the floating-point interpreter.

       -40    Combine the -s and -f options, to check for suitability for an 11/40-class PDP11.

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 float-
       ing-point simulator.  This test does not work if the object has been stripped.

DIAGNOSTICS

       The exit status is 0 if all named files are runnable with the specified options, nonzero otherwise.

AUTHOR

       Mike Karels, University of California, Berkeley

3rd Berkeley Distribution													       CHECKOBJ(1)

FEGETENV(3)						   BSD Library Functions Manual 					       FEGETENV(3)

NAME

     fegetenv, feholdexcept, fesetenv, feupdateenv -- functions providing access to the floating-point environment.

SYNOPSIS

     #include <fenv.h>
     #pragma STDC FENV_ACCESS ON

     int
     fegetenv(fenv_t *envp);

     int
     feholdexcept(fenvt_t *envp);

     int
     fesetenv(fenv_t *envp);

     int
     feupdateenv(fenv_t *envp);

DESCRIPTION

     These functions provide the means to manage the entire floating-point environment--including both status flags and control modes--as a single
     entity.

     The fegetenv() function attempts to store the current floating-point environment in the object pointed to by envp.  It returns zero if the
     environment was successfully stored, and a nonzero value otherwise.

     The feholdexcept() function saves the current floating-point environment in the object pointed to by envp, clears the floating-point status
     flags, and then installs a "non-stop" mode, if available, under which no traps are taken for floating-point exceptions (as is the case in
     default IEEE-754 floating-point execution).  It returns zero if and only if such a mode was successfully installed.

     The fesetenv() function attempts to establish the floating-point environment represented by the object pointed to by envp.  This object shall
     have been set by a call to fegetenv() or feholdexcept(), or be equal to a floating-point environment macro defined in <fenv.h>.  Note that
     this function merely installs the floating-point status flags represented by its argument, and does not raise the corresponding floating-
     point exceptions.	It returns zero if and only if the environment pointed to by envp was successfully installed.

     The feupdateenv() function attempts to save the currently raised floating-point flags, install the floating-point environment represented by
     *envp, and then raise the floating-point exceptions corresponding to the saved flags.  The object pointed to by envp shall have been set by a
     call to fegetenv() or feholdexcept(), or be equal to a floating-point environment macro defined in <fenv.h>.  It returns zero if and only if
     all of the specified actions were successfully carried out.

SEE ALSO

     fenv(3), feclearexcept(3), fegetexceptflag(3), fegetround(3), feraiseexcept(3), fesetexceptflag(3), fesetround(3), feraiseexcept(3)

STANDARDS

     These functions conform to ISO/IEC 9899:TC3.

BSD
								    May 9, 2011 							       BSD