Update ipc/ directory to use mach_port_name_t

Make it explicit where we use port names versus actual ports. For the 64
bit kernel, port names and ports are of different size so this corrects
the syscall arguments and internal structs to have the right size.

This patch also uncovered several issues we need to solve to make
GNUMach work well on 64 bits. First, the mach_msg call will receive 4
byte port names while the kernel "thinks" they are 8 bytes, which will
be a problem. Also, when we send a message, the kernel translates the
port names into port pointers in the message copied from user space.
This also won't work on 64 bits. In this patch, I added several TODOs to fix
the issues later.
Message-Id: <Y4cCzNmc6vC4bjsX@viriathus>

1 files changed, 5 insertions, 3 deletions

diff --git a/kern/exception.c b/kern/exception.c
index 6a812490..2ff122f2 100644
--- a/kern/exception.c
+++ b/kern/exception.c
@@ -269,9 +269,9 @@ exception_no_server(void)
 struct mach_exception {
 	mach_msg_header_t	Head;
 	mach_msg_type_t		threadType;
-	mach_port_t		thread;
+	mach_port_name_t	thread;
 	mach_msg_type_t		taskType;
-	mach_port_t		task;
+	mach_port_name_t	task;
 	mach_msg_type_t		exceptionType;
 	integer_t		exception;
 	mach_msg_type_t		codeType;
@@ -607,10 +607,12 @@ exception_raise(
     {
 	kern_return_t kr;
 	ipc_entry_t entry;
+	mach_port_name_t port_name;
 
-	kr = ipc_entry_get (space, &exc->Head.msgh_remote_port, &entry);
+	kr = ipc_entry_get (space, &port_name, &entry);
 	if (kr)
 		goto abort_copyout;
+	exc->Head.msgh_remote_port = (mach_port_t) port_name;
     {
 	mach_port_gen_t gen;