From 480a728dee614ba5f8afda7d09ca6be8ffa5e860 Mon Sep 17 00:00:00 2001
From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Sat, 31 May 2003 21:14:25 +0000
Subject: [PATCH] Implement cpu_set_upcall(). Required by libthr and used by
 thr_create(2). This implementation is so far only compile tested. But since
 this is also the last of the functions required to support libthr, we're now
 functionally complete (for some weird definition of functionally; and
 complete). Runtime testing can commence.

---
 sys/ia64/ia64/vm_machdep.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/sys/ia64/ia64/vm_machdep.c b/sys/ia64/ia64/vm_machdep.c
index d0ecb6e667a..28227642a5d 100644
--- a/sys/ia64/ia64/vm_machdep.c
+++ b/sys/ia64/ia64/vm_machdep.c
@@ -114,6 +114,28 @@ cpu_thread_setup(struct thread *td)
 void
 cpu_set_upcall(struct thread *td, void *pcb)
 {
+	struct pcb *pcb2;
+	struct trapframe *tf;
+
+	pcb2 = td->td_pcb;
+	bcopy(pcb, pcb2, sizeof(*pcb2));
+
+	tf = (struct trapframe *)pcb2 - 1;
+	td->td_frame = tf;
+	tf->tf_length = sizeof(struct trapframe);
+	tf->tf_flags = FRAME_SYSCALL;
+
+	tf->tf_scratch.gr8 = 0;
+	tf->tf_scratch.gr9 = 1;
+	tf->tf_scratch.gr10 = 0;
+
+	/* XXX */
+	pcb2->pcb_special.bspstore = td->td_kstack + tf->tf_special.ndirty;
+	pcb2->pcb_special.pfs = 0;
+	pcb2->pcb_current_pmap = vmspace_pmap(td->td_proc->p_vmspace);
+	pcb2->pcb_special.sp = (uintptr_t)tf - 16;
+	pcb2->pcb_special.rp = FDESC_FUNC(fork_trampoline);
+	cpu_set_fork_handler(td, (void (*)(void*))fork_return, td);
 }
 
 void