From f07a4c844da9f0ecae5bbee1ab94be56505f26f7 Mon Sep 17 00:00:00 2001
From: Thomas Bushnell <thomas@gnu.org>
Date: Tue, 25 Feb 1997 21:28:37 +0000
Subject: Initial source

---
 ipc/mach_rpc.c | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 ipc/mach_rpc.c

(limited to 'ipc/mach_rpc.c')

diff --git a/ipc/mach_rpc.c b/ipc/mach_rpc.c
new file mode 100644
index 0000000..0ceeeb4
--- /dev/null
+++ b/ipc/mach_rpc.c
@@ -0,0 +1,148 @@
+/* 
+ * Copyright (c) 1994 The University of Utah and
+ * the Computer Systems Laboratory (CSL).  All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ */
+
+#ifdef MIGRATING_THREADS
+
+#include <mach/kern_return.h>
+#include <mach/port.h>
+#include <mach/rpc.h>
+#include <mach/notify.h>
+#include <mach/mach_param.h>
+#include <mach/vm_param.h>
+#include <mach/vm_prot.h>
+#include <kern/task.h>
+#include <kern/act.h>
+#include <vm/vm_map.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_user.h>
+#include <ipc/ipc_entry.h>
+#include <ipc/ipc_space.h>
+#include <ipc/ipc_object.h>
+#include <ipc/ipc_notify.h>
+#include <ipc/ipc_port.h>
+#include <ipc/ipc_pset.h>
+#include <ipc/ipc_right.h>
+
+#undef DEBUG_MPRC
+
+/*
+ * XXX need to identify if one endpoint of an RPC is the kernel to
+ * ensure proper port name translation (or lack of).  This is bogus.
+ */
+#define ISKERNELACT(act)	((act)->task == kernel_task)
+
+/*
+ * Copy the indicated port from the task associated with the source
+ * activation into the task associated with the destination activation.
+ *
+ * XXX on errors we should probably clear the portp to avoid leaking
+ * info to the other side.
+ */
+kern_return_t
+mach_port_rpc_copy(portp, sact, dact)
+	struct rpc_port_desc *portp;
+	struct Act *sact, *dact;
+{
+	ipc_space_t sspace, dspace;
+	mach_msg_type_name_t tname;
+	ipc_object_t iname;
+	kern_return_t kr;
+
+#ifdef DEBUG_MPRC
+	printf("m_p_rpc_copy(portp=%x/%x, sact=%x, dact=%x): ",
+	       portp->name, portp->msgt_name, sact, dact);
+#endif
+	sspace = sact->task->itk_space;
+	dspace = dact->task->itk_space;
+	if (sspace == IS_NULL || dspace == IS_NULL) {
+#ifdef DEBUG_MPRC
+		printf("bogus src (%x) or dst (%x) space\n", sspace, dspace);
+#endif
+		return KERN_INVALID_TASK;
+	}
+
+	if (!MACH_MSG_TYPE_PORT_ANY(portp->msgt_name)) {
+#ifdef DEBUG_MPRC
+		printf("invalid port type\n");
+#endif
+		return KERN_INVALID_VALUE;
+	}
+
+	if (ISKERNELACT(sact)) {
+		iname = (ipc_object_t) portp->name;
+		ipc_object_copyin_from_kernel(iname, portp->msgt_name);
+		kr = KERN_SUCCESS;
+	} else {
+		kr = ipc_object_copyin(sspace, portp->name, portp->msgt_name,
+				       &iname);
+	}
+	if (kr != KERN_SUCCESS) {
+#ifdef DEBUG_MPRC
+		printf("copyin returned %x\n", kr);
+#endif
+		return kr;
+	}
+
+	tname = ipc_object_copyin_type(portp->msgt_name);
+	if (!IO_VALID(iname)) {
+		portp->name = (mach_port_t) iname;
+		portp->msgt_name = tname;
+#ifdef DEBUG_MPRC
+		printf("iport %x invalid\n", iname);
+#endif
+		return KERN_SUCCESS;
+	}
+
+	if (ISKERNELACT(dact)) {
+		portp->name = (mach_port_t) iname;
+		kr = KERN_SUCCESS;
+	} else {
+		kr = ipc_object_copyout(dspace, iname, tname, TRUE,
+					&portp->name);
+	}
+	if (kr != KERN_SUCCESS) {
+		ipc_object_destroy(iname, tname);
+
+		if (kr == KERN_INVALID_CAPABILITY)
+			portp->name = MACH_PORT_DEAD;
+		else {
+			portp->name = MACH_PORT_NULL;
+#ifdef DEBUG_MPRC
+			printf("copyout iport %x returned %x\n", iname);
+#endif
+			return kr;
+		}
+	}
+
+	portp->msgt_name = tname;
+#ifdef DEBUG_MPRC
+	printf("portp=%x/%x, iname=%x\n", portp->name, portp->msgt_name, iname);
+#endif
+	return KERN_SUCCESS;
+}
+
+kern_return_t
+mach_port_rpc_sig(space, name, buffer, buflen)
+{
+	return KERN_FAILURE;
+}
+
+#endif /* MIGRATING_THREADS */
-- 
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