From 04eb18e2fb92a973b2ddf3d1b654dd59ebf5f45a Mon Sep 17 00:00:00 2001
From: Sean Cross <sean@xobs.io>
Date: Thu, 19 Mar 2020 08:54:52 +0800
Subject: [PATCH] kernel: add Connect stub

It doesn't respond, but it prints a message now at least.

Signed-off-by: Sean Cross <sean@xobs.io>
---
 kernel/src/services.rs | 8 +++++++-
 kernel/src/syscall.rs  | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/kernel/src/services.rs b/kernel/src/services.rs
index caae30f6c..2170dc01e 100644
--- a/kernel/src/services.rs
+++ b/kernel/src/services.rs
@@ -5,7 +5,7 @@ pub use crate::arch::ProcessContext;
 use crate::args::KernelArguments;
 use crate::mem::{MemoryManagerHandle, PAGE_SIZE};
 use core::{mem, slice};
-use xous::{MemoryFlags, PID, SID};
+use xous::{MemoryFlags, CID, PID, SID};
 
 const MAX_PROCESS_COUNT: usize = 32;
 const MAX_SERVER_COUNT: usize = 32;
@@ -490,6 +490,12 @@ impl SystemServices {
         }
         Err(xous::Error::OutOfMemory)
     }
+
+    /// Allocate a new server ID for this process and return the address.
+    /// If the server table is full, return an error.
+    pub fn connect_to_server(&mut self, sid: SID) -> Result<CID, xous::Error> {
+        Err(xous::Error::OutOfMemory)
+    }
 }
 
 /// How many people have checked out the handle object.
diff --git a/kernel/src/syscall.rs b/kernel/src/syscall.rs
index a9f4358b2..04644fa28 100644
--- a/kernel/src/syscall.rs
+++ b/kernel/src/syscall.rs
@@ -244,6 +244,12 @@ pub fn handle(call: SysCall) -> xous::Result {
                 .map(|x| xous::Result::ServerID(x))
                 .unwrap_or_else(|e| xous::Result::Error(e))
         }
+        SysCall::Connect(sid) => {
+            let mut ss = SystemServicesHandle::get();
+            ss.connect_to_server(sid)
+                .map(|x| xous::Result::ConnectionID(x))
+                .unwrap_or_else(|e| xous::Result::Error(e))
+        }
         _ => xous::Result::Error(xous::Error::UnhandledSyscall),
     }
 }