+ ABFD, when non NULL, designates a target program. The program is
+ not loaded.
+
+ ARGV is a standard ARGV pointer such as that passed from the
+ command line. The syntax of the argument list is is assumed to be
+ ``SIM-PROG { SIM-OPTION } [ TARGET-PROGRAM { TARGET-OPTION } ]''.
+ The trailing TARGET-PROGRAM and args are only valid for a
+ stand-alone simulator.
+
+ On success, the result is a non NULL descriptor that shall be
+ passed to the other sim_foo functions. While the simulator
+ configuration can be parameterized by (in decreasing precedence)
+ ARGV's SIM-OPTION, ARGV's TARGET-PROGRAM and the ABFD argument, the
+ successful creation of the simulator shall not dependent on the
+ presence of any of these arguments/options.
+
+ Hardware simulator: The created simulator shall be sufficiently
+ initialized to handle, with out restrictions any client requests
+ (including memory reads/writes, register fetch/stores and a
+ resume).
+
+ Process simulator: that process is not created until a call to
+ sim_create_inferior. FIXME: What should the state of the simulator
+ be? */
+
+SIM_DESC sim_open PARAMS ((SIM_OPEN_KIND kind, struct host_callback_struct *callback, struct _bfd *abfd, char **argv));