1995-08-15 00:49:23 +02:00
|
|
|
/* Replacement for mach_msg used in interruptible Hurd RPCs.
|
2005-10-23 02:55:27 +02:00
|
|
|
Copyright (C) 1995,96,97,98,99,2000,2001,2002,2005
|
|
|
|
Free Software Foundation, Inc.
|
1997-02-15 05:31:36 +01:00
|
|
|
This file is part of the GNU C Library.
|
1995-08-15 00:49:23 +02:00
|
|
|
|
1997-02-15 05:31:36 +01:00
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
2001-07-06 06:58:11 +02:00
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
1995-08-15 00:49:23 +02:00
|
|
|
|
1997-02-15 05:31:36 +01:00
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
2001-07-06 06:58:11 +02:00
|
|
|
Lesser General Public License for more details.
|
1995-08-15 00:49:23 +02:00
|
|
|
|
2001-07-06 06:58:11 +02:00
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
|
|
License along with the GNU C Library; if not, write to the Free
|
|
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
|
02111-1307 USA. */
|
1995-08-15 00:49:23 +02:00
|
|
|
|
|
|
|
#include <mach.h>
|
|
|
|
#include <mach/mig_errors.h>
|
1996-01-04 11:00:22 +01:00
|
|
|
#include <mach/mig_support.h>
|
1995-08-15 00:49:23 +02:00
|
|
|
#include <hurd/signal.h>
|
1999-08-23 00:23:58 +02:00
|
|
|
#include <assert.h>
|
1995-08-15 00:49:23 +02:00
|
|
|
|
1995-08-18 00:55:22 +02:00
|
|
|
#include "intr-msg.h"
|
|
|
|
|
2002-02-18 21:57:51 +01:00
|
|
|
#ifdef NDR_CHAR_ASCII /* OSF Mach flavors have different names. */
|
|
|
|
# define mig_reply_header_t mig_reply_error_t
|
|
|
|
#endif
|
1995-08-18 00:55:22 +02:00
|
|
|
|
1995-08-15 00:49:23 +02:00
|
|
|
error_t
|
|
|
|
_hurd_intr_rpc_mach_msg (mach_msg_header_t *msg,
|
|
|
|
mach_msg_option_t option,
|
|
|
|
mach_msg_size_t send_size,
|
|
|
|
mach_msg_size_t rcv_size,
|
|
|
|
mach_port_t rcv_name,
|
|
|
|
mach_msg_timeout_t timeout,
|
|
|
|
mach_port_t notify)
|
|
|
|
{
|
|
|
|
error_t err;
|
1998-10-19 01:19:12 +02:00
|
|
|
struct hurd_sigstate *ss;
|
1999-08-23 00:23:58 +02:00
|
|
|
const mach_msg_option_t user_option = option;
|
|
|
|
const mach_msg_timeout_t user_timeout = timeout;
|
|
|
|
|
2002-02-18 21:57:51 +01:00
|
|
|
struct clobber
|
|
|
|
{
|
|
|
|
#ifdef NDR_CHAR_ASCII
|
|
|
|
NDR_record_t ndr;
|
|
|
|
#else
|
|
|
|
mach_msg_type_t type;
|
|
|
|
#endif
|
|
|
|
error_t err;
|
|
|
|
};
|
1999-08-23 00:23:58 +02:00
|
|
|
union msg
|
|
|
|
{
|
|
|
|
mach_msg_header_t header;
|
|
|
|
mig_reply_header_t reply;
|
|
|
|
struct
|
|
|
|
{
|
|
|
|
mach_msg_header_t header;
|
2002-02-18 21:57:51 +01:00
|
|
|
#ifdef NDR_CHAR_ASCII
|
|
|
|
NDR_record_t ndr;
|
|
|
|
#else
|
1999-08-23 00:23:58 +02:00
|
|
|
int type;
|
2002-02-18 21:57:51 +01:00
|
|
|
#endif
|
1999-08-23 00:23:58 +02:00
|
|
|
int code;
|
|
|
|
} check;
|
|
|
|
struct
|
1998-10-19 01:19:12 +02:00
|
|
|
{
|
1999-08-23 00:23:58 +02:00
|
|
|
mach_msg_header_t header;
|
|
|
|
struct clobber data;
|
|
|
|
} request;
|
|
|
|
};
|
|
|
|
union msg *const m = (void *) msg;
|
|
|
|
mach_msg_bits_t msgh_bits;
|
|
|
|
mach_port_t remote_port;
|
|
|
|
mach_msg_id_t msgid;
|
|
|
|
struct clobber save_data;
|
|
|
|
|
|
|
|
if ((option & (MACH_SEND_MSG|MACH_RCV_MSG)) != (MACH_SEND_MSG|MACH_RCV_MSG)
|
|
|
|
|| _hurd_msgport_thread == MACH_PORT_NULL)
|
|
|
|
{
|
|
|
|
/* Either this is not an RPC (i.e., only a send or only a receive),
|
|
|
|
so it can't be interruptible; or, the signal thread is not set up
|
|
|
|
yet, so we cannot do the normal signal magic. Do a normal,
|
|
|
|
uninterruptible mach_msg call instead. */
|
|
|
|
return __mach_msg (&m->header, option, send_size, rcv_size, rcv_name,
|
1998-10-19 01:19:12 +02:00
|
|
|
timeout, notify);
|
|
|
|
}
|
|
|
|
|
|
|
|
ss = _hurd_self_sigstate ();
|
|
|
|
|
1999-08-23 00:23:58 +02:00
|
|
|
/* Save state that gets clobbered by an EINTR reply message.
|
|
|
|
We will need to restore it if we want to retry the RPC. */
|
|
|
|
msgh_bits = m->header.msgh_bits;
|
|
|
|
remote_port = m->header.msgh_remote_port;
|
|
|
|
msgid = m->header.msgh_id;
|
|
|
|
assert (rcv_size >= sizeof m->request);
|
|
|
|
save_data = m->request.data;
|
1995-08-15 00:49:23 +02:00
|
|
|
|
|
|
|
/* Tell the signal thread that we are doing an interruptible RPC on
|
|
|
|
this port. If we get a signal and should return EINTR, the signal
|
|
|
|
thread will set this variable to MACH_PORT_NULL. The RPC might
|
|
|
|
return EINTR when some other thread gets a signal, in which case we
|
|
|
|
want to restart our call. */
|
1999-08-23 00:23:58 +02:00
|
|
|
ss->intr_port = m->header.msgh_remote_port;
|
1996-01-04 11:00:22 +01:00
|
|
|
|
1999-08-23 00:23:58 +02:00
|
|
|
/* A signal may arrive here, after intr_port is set, but before the
|
|
|
|
mach_msg system call. The signal handler might do an interruptible
|
|
|
|
RPC, and clobber intr_port; then it would not be set properly when we
|
|
|
|
actually did send the RPC, and a later signal wouldn't interrupt that
|
|
|
|
RPC. So, _hurd_setup_sighandler saves intr_port in the sigcontext,
|
|
|
|
and sigreturn restores it. */
|
1995-08-15 00:49:23 +02:00
|
|
|
|
|
|
|
message:
|
|
|
|
|
1999-08-23 00:23:58 +02:00
|
|
|
/* XXX
|
|
|
|
At all points here (once SS->intr_port is set), the signal thread
|
|
|
|
thinks we are "about to enter the syscall", and might mutate our
|
|
|
|
return-value register. This is bogus.
|
|
|
|
*/
|
|
|
|
|
1995-08-15 00:49:23 +02:00
|
|
|
if (ss->cancel)
|
|
|
|
{
|
1996-02-01 02:08:12 +01:00
|
|
|
/* We have been cancelled. Don't do an RPC at all. */
|
|
|
|
ss->intr_port = MACH_PORT_NULL;
|
1995-08-15 00:49:23 +02:00
|
|
|
ss->cancel = 0;
|
1996-01-04 11:00:22 +01:00
|
|
|
return EINTR;
|
1995-08-15 00:49:23 +02:00
|
|
|
}
|
1996-01-04 11:00:22 +01:00
|
|
|
|
1999-08-23 00:23:58 +02:00
|
|
|
/* Note that the signal trampoline code might modify our OPTION! */
|
1996-01-04 11:00:22 +01:00
|
|
|
err = INTR_MSG_TRAP (msg, option, send_size,
|
|
|
|
rcv_size, rcv_name, timeout, notify);
|
1995-08-15 00:49:23 +02:00
|
|
|
|
|
|
|
switch (err)
|
|
|
|
{
|
1995-08-31 02:02:32 +02:00
|
|
|
case MACH_RCV_TIMED_OUT:
|
1999-08-23 00:23:58 +02:00
|
|
|
if (user_option & MACH_RCV_TIMEOUT)
|
1995-08-31 02:02:32 +02:00
|
|
|
/* The real user RPC timed out. */
|
|
|
|
break;
|
|
|
|
else
|
|
|
|
/* The operation was supposedly interrupted, but still has
|
|
|
|
not returned. Declare it interrupted. */
|
|
|
|
goto interrupted;
|
|
|
|
|
1995-08-15 00:49:23 +02:00
|
|
|
case MACH_SEND_INTERRUPTED: /* RPC didn't get out. */
|
1999-08-23 00:23:58 +02:00
|
|
|
if (!(option & MACH_SEND_MSG))
|
|
|
|
{
|
|
|
|
/* Oh yes, it did! Since we were not doing a message send,
|
|
|
|
this return code cannot have come from the kernel!
|
|
|
|
Instead, it was the signal thread mutating our state to tell
|
|
|
|
us not to enter this RPC. However, we are already in the receive!
|
|
|
|
Since the signal thread thought we weren't in the RPC yet,
|
|
|
|
it didn't do an interrupt_operation.
|
|
|
|
XXX */
|
|
|
|
goto retry_receive;
|
|
|
|
}
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
|
2000-03-18 09:25:11 +01:00
|
|
|
/* These are the other codes that mean a pseudo-receive modified
|
|
|
|
the message buffer and we might need to clean up the port rights. */
|
|
|
|
case MACH_SEND_TIMED_OUT:
|
|
|
|
case MACH_SEND_INVALID_NOTIFY:
|
2002-02-18 21:57:51 +01:00
|
|
|
#ifdef MACH_SEND_NO_NOTIFY
|
2000-03-18 09:25:11 +01:00
|
|
|
case MACH_SEND_NO_NOTIFY:
|
2002-02-18 21:57:51 +01:00
|
|
|
#endif
|
|
|
|
#ifdef MACH_SEND_NOTIFY_IN_PROGRESS
|
2000-03-18 09:25:11 +01:00
|
|
|
case MACH_SEND_NOTIFY_IN_PROGRESS:
|
2002-02-18 21:57:51 +01:00
|
|
|
#endif
|
2000-03-18 09:25:11 +01:00
|
|
|
if (MACH_MSGH_BITS_REMOTE (msg->msgh_bits) == MACH_MSG_TYPE_MOVE_SEND)
|
|
|
|
{
|
|
|
|
__mach_port_deallocate (__mach_task_self (), msg->msgh_remote_port);
|
|
|
|
msg->msgh_bits
|
|
|
|
= (MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND,
|
|
|
|
MACH_MSGH_BITS_LOCAL (msg->msgh_bits))
|
|
|
|
| MACH_MSGH_BITS_OTHER (msg->msgh_bits));
|
|
|
|
}
|
|
|
|
if (msg->msgh_bits & MACH_MSGH_BITS_COMPLEX)
|
|
|
|
{
|
2002-02-18 21:57:51 +01:00
|
|
|
#ifndef MACH_MSG_PORT_DESCRIPTOR
|
2000-03-18 09:25:11 +01:00
|
|
|
/* Check for MOVE_SEND rights in the message. These hold refs
|
|
|
|
that we need to release in case the message is in fact never
|
|
|
|
re-sent later. Since it might in fact be re-sent, we turn
|
|
|
|
these into COPY_SEND's after deallocating the extra user ref;
|
|
|
|
the caller is responsible for still holding a ref to go with
|
|
|
|
the original COPY_SEND right, so the resend copies it again. */
|
|
|
|
|
|
|
|
mach_msg_type_long_t *ty = (void *) (msg + 1);
|
|
|
|
while ((void *) ty < (void *) msg + msg->msgh_size)
|
|
|
|
{
|
|
|
|
mach_msg_type_name_t name;
|
|
|
|
mach_msg_type_size_t size;
|
|
|
|
mach_msg_type_number_t number;
|
|
|
|
|
|
|
|
inline void clean_ports (mach_port_t *ports, int dealloc)
|
|
|
|
{
|
|
|
|
mach_msg_type_number_t i;
|
|
|
|
switch (name)
|
|
|
|
{
|
|
|
|
case MACH_MSG_TYPE_MOVE_SEND:
|
|
|
|
for (i = 0; i < number; i++)
|
|
|
|
__mach_port_deallocate (__mach_task_self (), *ports++);
|
2005-10-23 02:43:15 +02:00
|
|
|
if (ty->msgtl_header.msgt_longform)
|
|
|
|
ty->msgtl_name = MACH_MSG_TYPE_COPY_SEND;
|
|
|
|
else
|
|
|
|
ty->msgtl_header.msgt_name = MACH_MSG_TYPE_COPY_SEND;
|
2000-03-18 09:25:11 +01:00
|
|
|
break;
|
|
|
|
case MACH_MSG_TYPE_COPY_SEND:
|
|
|
|
case MACH_MSG_TYPE_MOVE_RECEIVE:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (MACH_MSG_TYPE_PORT_ANY (name))
|
|
|
|
assert (! "unexpected port type in interruptible RPC");
|
|
|
|
}
|
|
|
|
if (dealloc)
|
|
|
|
__vm_deallocate (__mach_task_self (),
|
|
|
|
(vm_address_t) ports,
|
|
|
|
number * sizeof (mach_port_t));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ty->msgtl_header.msgt_longform)
|
|
|
|
{
|
|
|
|
name = ty->msgtl_name;
|
|
|
|
size = ty->msgtl_size;
|
|
|
|
number = ty->msgtl_number;
|
2005-10-23 02:43:15 +02:00
|
|
|
ty = (void *) ty + sizeof (mach_msg_type_long_t);
|
2000-03-18 09:25:11 +01:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
name = ty->msgtl_header.msgt_name;
|
|
|
|
size = ty->msgtl_header.msgt_size;
|
|
|
|
number = ty->msgtl_header.msgt_number;
|
2005-10-23 02:43:15 +02:00
|
|
|
ty = (void *) ty + sizeof (mach_msg_type_t);
|
2000-03-18 09:25:11 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
if (ty->msgtl_header.msgt_inline)
|
|
|
|
{
|
|
|
|
clean_ports ((void *) ty, 0);
|
|
|
|
/* calculate length of data in bytes, rounding up */
|
2005-10-23 02:43:15 +02:00
|
|
|
ty = (void *) ty + (((((number * size) + 7) >> 3)
|
|
|
|
+ sizeof (mach_msg_type_t) - 1)
|
|
|
|
&~ (sizeof (mach_msg_type_t) - 1));
|
2000-03-18 09:25:11 +01:00
|
|
|
}
|
|
|
|
else
|
2001-12-17 02:03:08 +01:00
|
|
|
{
|
|
|
|
clean_ports (*(void **) ty,
|
|
|
|
ty->msgtl_header.msgt_deallocate);
|
2005-10-23 02:43:15 +02:00
|
|
|
ty = (void *) ty + sizeof (void *);
|
2001-12-17 02:03:08 +01:00
|
|
|
}
|
2000-03-18 09:25:11 +01:00
|
|
|
}
|
2002-02-18 21:57:51 +01:00
|
|
|
#else /* Untyped Mach IPC flavor. */
|
|
|
|
mach_msg_body_t *body = (void *) (msg + 1);
|
|
|
|
mach_msg_descriptor_t *desc = (void *) (body + 1);
|
|
|
|
mach_msg_descriptor_t *desc_end = desc + body->msgh_descriptor_count;
|
|
|
|
for (; desc < desc_end; ++desc)
|
|
|
|
switch (desc->type.type)
|
|
|
|
{
|
|
|
|
case MACH_MSG_PORT_DESCRIPTOR:
|
|
|
|
switch (desc->port.disposition)
|
|
|
|
{
|
|
|
|
case MACH_MSG_TYPE_MOVE_SEND:
|
|
|
|
__mach_port_deallocate (mach_task_self (),
|
|
|
|
desc->port.name);
|
|
|
|
desc->port.disposition = MACH_MSG_TYPE_COPY_SEND;
|
|
|
|
break;
|
|
|
|
case MACH_MSG_TYPE_COPY_SEND:
|
|
|
|
case MACH_MSG_TYPE_MOVE_RECEIVE:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
assert (! "unexpected port type in interruptible RPC");
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case MACH_MSG_OOL_DESCRIPTOR:
|
|
|
|
if (desc->out_of_line.deallocate)
|
|
|
|
__vm_deallocate (__mach_task_self (),
|
|
|
|
(vm_address_t) desc->out_of_line.address,
|
|
|
|
desc->out_of_line.size);
|
|
|
|
break;
|
|
|
|
case MACH_MSG_OOL_PORTS_DESCRIPTOR:
|
|
|
|
switch (desc->ool_ports.disposition)
|
|
|
|
{
|
|
|
|
case MACH_MSG_TYPE_MOVE_SEND:
|
|
|
|
{
|
|
|
|
mach_msg_size_t i;
|
|
|
|
const mach_port_t *ports = desc->ool_ports.address;
|
|
|
|
for (i = 0; i < desc->ool_ports.count; ++i)
|
|
|
|
__mach_port_deallocate (__mach_task_self (), ports[i]);
|
|
|
|
desc->ool_ports.disposition = MACH_MSG_TYPE_COPY_SEND;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case MACH_MSG_TYPE_COPY_SEND:
|
|
|
|
case MACH_MSG_TYPE_MOVE_RECEIVE:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
assert (! "unexpected port type in interruptible RPC");
|
|
|
|
}
|
|
|
|
if (desc->ool_ports.deallocate)
|
|
|
|
__vm_deallocate (__mach_task_self (),
|
|
|
|
(vm_address_t) desc->ool_ports.address,
|
|
|
|
desc->ool_ports.count
|
|
|
|
* sizeof (mach_port_t));
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
assert (! "unexpected descriptor type in interruptible RPC");
|
|
|
|
}
|
|
|
|
#endif
|
2000-03-18 09:25:11 +01:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
1999-08-23 00:23:58 +02:00
|
|
|
case EINTR:
|
|
|
|
/* Either the process was stopped and continued,
|
|
|
|
or the server doesn't support interrupt_operation. */
|
1995-08-15 00:49:23 +02:00
|
|
|
if (ss->intr_port != MACH_PORT_NULL)
|
|
|
|
/* If this signal was for us and it should interrupt calls, the
|
|
|
|
signal thread will have cleared SS->intr_port.
|
|
|
|
Since it's not cleared, the signal was for another thread,
|
|
|
|
or SA_RESTART is set. Restart the interrupted call. */
|
1996-01-04 11:00:22 +01:00
|
|
|
{
|
1999-08-23 00:23:58 +02:00
|
|
|
/* Make sure we have a valid reply port. The one we were using
|
|
|
|
may have been destroyed by interruption. */
|
|
|
|
m->header.msgh_local_port = rcv_name = __mig_get_reply_port ();
|
|
|
|
m->header.msgh_bits = msgh_bits;
|
|
|
|
option = user_option;
|
|
|
|
timeout = user_timeout;
|
1996-01-04 11:00:22 +01:00
|
|
|
goto message;
|
|
|
|
}
|
1995-08-15 00:49:23 +02:00
|
|
|
/* FALLTHROUGH */
|
|
|
|
|
|
|
|
case MACH_RCV_PORT_DIED:
|
|
|
|
/* Server didn't respond to interrupt_operation,
|
|
|
|
so the signal thread destroyed the reply port. */
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
|
1995-08-31 02:02:32 +02:00
|
|
|
interrupted:
|
1995-08-15 00:49:23 +02:00
|
|
|
err = EINTR;
|
|
|
|
|
|
|
|
/* The EINTR return indicates cancellation, so clear the flag. */
|
|
|
|
ss->cancel = 0;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MACH_RCV_INTERRUPTED: /* RPC sent; no reply. */
|
|
|
|
option &= ~MACH_SEND_MSG; /* Don't send again. */
|
1999-08-23 00:23:58 +02:00
|
|
|
retry_receive:
|
1995-08-15 00:49:23 +02:00
|
|
|
if (ss->intr_port == MACH_PORT_NULL)
|
|
|
|
{
|
|
|
|
/* This signal or cancellation was for us. We need to wait for
|
|
|
|
the reply, but not hang forever. */
|
|
|
|
option |= MACH_RCV_TIMEOUT;
|
1995-08-31 02:02:32 +02:00
|
|
|
/* Never decrease the user's timeout. */
|
1999-08-23 00:23:58 +02:00
|
|
|
if (!(user_option & MACH_RCV_TIMEOUT)
|
|
|
|
|| timeout > _hurd_interrupted_rpc_timeout)
|
1995-08-31 02:02:32 +02:00
|
|
|
timeout = _hurd_interrupted_rpc_timeout;
|
1995-08-15 00:49:23 +02:00
|
|
|
}
|
1999-08-23 00:23:58 +02:00
|
|
|
else
|
|
|
|
{
|
|
|
|
option = user_option;
|
|
|
|
timeout = user_timeout;
|
|
|
|
}
|
1995-08-15 00:49:23 +02:00
|
|
|
goto message; /* Retry the receive. */
|
|
|
|
|
|
|
|
case MACH_MSG_SUCCESS:
|
1999-08-23 00:23:58 +02:00
|
|
|
{
|
|
|
|
/* We got a reply. Was it EINTR? */
|
2002-02-18 21:57:51 +01:00
|
|
|
#ifdef MACH_MSG_TYPE_BIT
|
1999-08-23 00:23:58 +02:00
|
|
|
const union
|
1995-08-15 00:49:23 +02:00
|
|
|
{
|
1999-08-23 00:23:58 +02:00
|
|
|
mach_msg_type_t t;
|
|
|
|
int i;
|
|
|
|
} check =
|
|
|
|
{ t: { MACH_MSG_TYPE_INTEGER_T, sizeof (integer_t) * 8,
|
|
|
|
1, TRUE, FALSE, FALSE, 0 } };
|
2002-02-18 21:57:51 +01:00
|
|
|
#endif
|
1999-08-23 00:23:58 +02:00
|
|
|
|
|
|
|
if (m->reply.RetCode == EINTR &&
|
|
|
|
m->header.msgh_size == sizeof m->reply &&
|
2002-02-18 21:57:51 +01:00
|
|
|
#ifdef MACH_MSG_TYPE_BIT
|
1999-08-23 00:23:58 +02:00
|
|
|
m->check.type == check.i &&
|
2002-02-18 21:57:51 +01:00
|
|
|
#endif
|
1999-08-23 00:23:58 +02:00
|
|
|
!(m->header.msgh_bits & MACH_MSGH_BITS_COMPLEX))
|
|
|
|
{
|
|
|
|
/* It is indeed EINTR. Is the interrupt for us? */
|
|
|
|
if (ss->intr_port != MACH_PORT_NULL)
|
|
|
|
{
|
1995-08-15 00:49:23 +02:00
|
|
|
/* Nope; repeat the RPC.
|
|
|
|
XXX Resources moved? */
|
1999-08-23 00:23:58 +02:00
|
|
|
|
|
|
|
assert (m->header.msgh_id == msgid + 100);
|
|
|
|
|
|
|
|
/* We know we have a valid reply port, because we just
|
|
|
|
received the EINTR reply on it. Restore it and the
|
|
|
|
other fields in the message header needed for send,
|
|
|
|
since the header now reflects receipt of the reply. */
|
|
|
|
m->header.msgh_local_port = rcv_name;
|
|
|
|
m->header.msgh_remote_port = remote_port;
|
|
|
|
m->header.msgh_id = msgid;
|
|
|
|
m->header.msgh_bits = msgh_bits;
|
|
|
|
/* Restore the two words clobbered by the reply data. */
|
|
|
|
m->request.data = save_data;
|
|
|
|
|
|
|
|
/* Restore the original mach_msg options.
|
|
|
|
OPTION may have had MACH_RCV_TIMEOUT added,
|
|
|
|
and/or MACH_SEND_MSG removed. */
|
|
|
|
option = user_option;
|
|
|
|
timeout = user_timeout;
|
|
|
|
|
|
|
|
/* Now we are ready to repeat the original message send. */
|
|
|
|
goto message;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
/* The EINTR return indicates cancellation,
|
|
|
|
so clear the flag. */
|
|
|
|
ss->cancel = 0;
|
|
|
|
}
|
|
|
|
}
|
1995-08-15 00:49:23 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default: /* Quiet -Wswitch-enum. */
|
2001-12-17 02:03:08 +01:00
|
|
|
break;
|
1995-08-15 00:49:23 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
ss->intr_port = MACH_PORT_NULL;
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|