diff options
Diffstat (limited to 'usr/src/uts/intel/ia32/syscall/getcontext.c')
| -rw-r--r-- | usr/src/uts/intel/ia32/syscall/getcontext.c | 32 |
1 files changed, 10 insertions, 22 deletions
diff --git a/usr/src/uts/intel/ia32/syscall/getcontext.c b/usr/src/uts/intel/ia32/syscall/getcontext.c index 35be9fc49c..972a90fdf5 100644 --- a/usr/src/uts/intel/ia32/syscall/getcontext.c +++ b/usr/src/uts/intel/ia32/syscall/getcontext.c @@ -18,16 +18,14 @@ * * CDDL HEADER END */ -/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ -/* All Rights Reserved */ - /* - * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ -#pragma ident "%Z%%M% %I% %E% SMI" +/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ +/* All Rights Reserved */ #include <sys/param.h> #include <sys/types.h> @@ -166,14 +164,14 @@ restorecontext(ucontext_t *ucp) setfpregs(lwp, &ucp->uc_mcontext.fpregs); if (ucp->uc_flags & UC_SIGMASK) { - proc_t *p = ttoproc(t); - - mutex_enter(&p->p_lock); + /* + * We don't need to acquire p->p_lock here; + * we are manipulating thread-private data. + */ schedctl_finish_sigblock(t); sigutok(&ucp->uc_sigmask, &t->t_hold); - if (sigcheck(p, t)) + if (sigcheck(ttoproc(t), t)) t->t_sig_check = 1; - mutex_exit(&p->p_lock); } } @@ -199,12 +197,7 @@ getsetcontext(int flag, void *arg) return (set_errno(EINVAL)); case GETCONTEXT: - if (schedctl_sigblock(curthread)) { - proc_t *p = ttoproc(curthread); - mutex_enter(&p->p_lock); - schedctl_finish_sigblock(curthread); - mutex_exit(&p->p_lock); - } + schedctl_finish_sigblock(curthread); savecontext(&uc, curthread->t_hold); if (copyout(&uc, arg, sizeof (uc))) return (set_errno(EFAULT)); @@ -331,12 +324,7 @@ getsetcontext32(int flag, void *arg) return (set_errno(EINVAL)); case GETCONTEXT: - if (schedctl_sigblock(curthread)) { - proc_t *p = ttoproc(curthread); - mutex_enter(&p->p_lock); - schedctl_finish_sigblock(curthread); - mutex_exit(&p->p_lock); - } + schedctl_finish_sigblock(curthread); savecontext32(&uc, curthread->t_hold); if (copyout(&uc, arg, sizeof (uc))) return (set_errno(EFAULT)); |