Displaying external variables
To display the values of all external variables in a program,
use the
$e
command.
External variables are variables in a program
that have global scope, or have been defined outside
of any function. This may include variables
defined in library routines used by your program.
For example, use the $e command to display the following external variables and their values in hexadecimal format in a program:
environ: 0xff08 fcnt: 0x0 gcnt: 0x0 hcnt: 0x0 errno: 0x0 _bufend: 0x0