diff options
Diffstat (limited to 'boot/boot.c')
| -rw-r--r-- | boot/boot.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/boot/boot.c b/boot/boot.c index 950aedb9..13a19d28 100644 --- a/boot/boot.c +++ b/boot/boot.c @@ -196,12 +196,66 @@ mig_reply_setup ( #undef OutP } +error_t +mach_msg_forward (mach_msg_header_t *inp, + mach_port_t destination, mach_msg_type_name_t destination_type) +{ + /* Put the reply port back at the correct position, insert new + destination. */ + inp->msgh_local_port = inp->msgh_remote_port; + inp->msgh_remote_port = destination; + inp->msgh_bits = + MACH_MSGH_BITS (destination_type, MACH_MSGH_BITS_REMOTE (inp->msgh_bits)) + | MACH_MSGH_BITS_OTHER (inp->msgh_bits); + + /* A word about resources carried in complex messages. + + "In a received message, msgt_deallocate is TRUE in type + descriptors for out-of-line memory". Therefore, "[the + out-of-line memory] is implicitly deallocated from the sender + [when we resend the message], as if by vm_deallocate". + + Similarly, rights in messages will be either + MACH_MSG_TYPE_PORT_SEND, MACH_MSG_TYPE_PORT_SEND_ONCE, or + MACH_MSG_TYPE_PORT_RECEIVE. These types are aliases for, + respectively, MACH_MSG_TYPE_MOVE_SEND, + MACH_MSG_TYPE_MOVE_SEND_ONCE, and MACH_MSG_TYPE_MOVE_RECEIVE. + Therefore, the rights are moved when we resend the message. */ + + return mach_msg (inp, MACH_SEND_MSG, inp->msgh_size, + 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); +} + int boot_demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp) { + error_t err; mig_routine_t routine; mig_reply_setup (inp, outp); + + if (inp->msgh_local_port == task_notification_port + && MACH_PORT_VALID (new_task_notification) + && 24000 <= inp->msgh_id && inp->msgh_id < 24100) + { + /* This is a message of the Process subsystem. We relay this to + allow the "outer" proc servers to communicate with the "inner" + one. */ + mig_reply_header_t *reply = (mig_reply_header_t *) outp; + + if (MACH_PORT_VALID (new_task_notification)) + err = mach_msg_forward (inp, new_task_notification, MACH_MSG_TYPE_COPY_SEND); + else + err = EOPNOTSUPP; + + if (err) + reply->RetCode = err; + else + reply->RetCode = MIG_NO_REPLY; + + return TRUE; + } + if ((routine = io_server_routine (inp)) || (routine = device_server_routine (inp)) || (routine = notify_server_routine (inp)) || |