+2004-06-25 J"orn Rennecke <joern.rennecke@superh.com>
+
+ * callback.h (host_callback_struct): Replace members fdopen and
+ alwaysopen with fd_buddy.
+ [sim/common: * callback.c: Changed all users. ]
+
2003-10-31 Kevin Buettner <kevin@redhat.com>
* sim-frv.h: New file.
int last_errno; /* host format */
int fdmap[MAX_CALLBACK_FDS];
- char fdopen[MAX_CALLBACK_FDS];
- char alwaysopen[MAX_CALLBACK_FDS];
+ /* fd_buddy is used to contruct circular lists of target fds that point to
+ the same host fd. A uniquely mapped fd points to itself; for a closed
+ one, fd_buddy has the value -1. The host file descriptors for stdin /
+ stdout / stderr are never closed by the simulators, so they are put
+ in a special fd_buddy circular list which also has MAX_CALLBACK_FDS
+ as a member. */
+ /* ??? We don't have a callback entry for dup, although it is trival to
+ implement now. */
+ short fd_buddy[MAX_CALLBACK_FDS+1];
/* System call numbers. */
CB_TARGET_DEFS_MAP *syscall_map;