From 6778dc3f1a5e444c281bf39a3f199abde00478bd Mon Sep 17 00:00:00 2001 From: Joern Rennecke Date: Fri, 25 Jun 2004 16:48:01 +0000 Subject: [PATCH] 2004-06-25 J"orn Rennecke include/gdb: * callback.h (host_callback_struct): Replace members fdopen and alwaysopen with fd_buddy. sim/common: * callback.c: Changed all users. --- include/gdb/ChangeLog | 6 ++++++ include/gdb/callback.h | 11 +++++++++-- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/include/gdb/ChangeLog b/include/gdb/ChangeLog index 3a17b1d79..80a9e0650 100644 --- a/include/gdb/ChangeLog +++ b/include/gdb/ChangeLog @@ -1,3 +1,9 @@ +2004-06-25 J"orn Rennecke + + * 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 * sim-frv.h: New file. diff --git a/include/gdb/callback.h b/include/gdb/callback.h index 3fa419143..aa956d05f 100644 --- a/include/gdb/callback.h +++ b/include/gdb/callback.h @@ -123,8 +123,15 @@ struct host_callback_struct 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;