PERFORCE change 162189 for review

[Ulf Lilleengen]

http://perforce.freebsd.org/chv.cgi?CH=162189

Change 162189 by lulf at lulf_carrot on 2009/05/16 22:45:22

	- First take on sigreturn.

Affected files ...

.. //depot/projects/avr32/src/sys/avr32/avr32/pm_machdep.c#9 edit

Differences ...

==== //depot/projects/avr32/src/sys/avr32/avr32/pm_machdep.c#9 (text+ko) ====

@@ -215,7 +215,35 @@
 int
 sigreturn(struct thread *td, struct sigreturn_args *uap)
 {
-	avr32_impl();
-	return (0);
+	struct trapframe *tf;
+	struct reg *regs;
+	const ucontext_t *ucp;
+	struct proc *p;
+	ucontext_t uc;
+	int error;
+
+	ucp = &uc;
+	p = td->td_proc;
+
+	error = copyin(uap->sigcntxp, &uc, sizeof(uc));
+	if (error != 0)
+		return (error);
+	tf = td->td_frame;
+	regs = &tf->regs;
+
+	/* Check magic */
+	if (ucp->uc_mcontext.mc_len != sizeof(ucp->uc_mcontext)) {
+		CTR2(KTR_SIG, "sigreturn: pid=%d, ucp %p\n", p->p_pid, ucp);
+		return (EINVAL);
+	}
+	bcopy(&ucp->uc_mcontext.mc_regs, regs,
+	    sizeof(ucp->uc_mcontext.mc_regs));
+
+	PROC_LOCK(p);
+	td->td_sigmask = ucp->uc_sigmask;
+	SIG_CANTMASK(td->td_sigmask);
+	signotify(td);
+	PROC_UNLOCK(p);
+	return (EJUSTRETURN);
 }