Tornado

Tornado 2.0
User’s Guide
simply supply the address in place of the function name. Thus the following
expression calls a parameterless function whose entry point is at address 10000
hex:
0x10000 ()
Subroutines as Commands
Both VxWorks and the Tornado shell itself provide routines that are meant to be
called from the shell interactively. You can think of these routines as commands,
rather than as subroutines, even though they can also be called with the same syntax
as C subroutines (and those that run on the target are in fact subroutines). All the
commands discussed in this chapter fall in this category. When you see the word
command, you can read subroutine, or vice versa, since their meaning here is
identical.
Arguments to Commands
In practice, most statements input to the shell are function calls, often to invoke
VxWorks facilities. To simplify this use of the shell, an important exception is
allowed to the standard expression syntax required by C. When a function name is
the very first item encountered in a shell statement, the parentheses surrounding
the function’s arguments may be omitted. Thus the following shell statements are
synonymous:
as are:
-> rename ("oldname", "newname")
-> rename "oldname", "newname"
-> evtBufferAddress ( )
-> evtBufferAddress
However, note that if you wish to assign the result to a variable, the function call
cannot be the first item in the shell statement—thus, the syntactic exception above
does not apply. The following captures the address, not the return value, of
evtBufferAddress( ):
-> value = evtBufferAddress
180