diff options
Diffstat (limited to 'arch/mips/kernel/linux32.c')
-rw-r--r-- | arch/mips/kernel/linux32.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index ca7ad78f4def..fc4dd6c9dd80 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c | |||
@@ -39,6 +39,7 @@ | |||
39 | #include <net/sock.h> | 39 | #include <net/sock.h> |
40 | #include <net/scm.h> | 40 | #include <net/scm.h> |
41 | 41 | ||
42 | #include <asm/compat-signal.h> | ||
42 | #include <asm/ipc.h> | 43 | #include <asm/ipc.h> |
43 | #include <asm/sim.h> | 44 | #include <asm/sim.h> |
44 | #include <asm/uaccess.h> | 45 | #include <asm/uaccess.h> |
@@ -736,3 +737,49 @@ _sys32_clone(nabi_no_regargs struct pt_regs regs) | |||
736 | return do_fork(clone_flags, newsp, ®s, 0, | 737 | return do_fork(clone_flags, newsp, ®s, 0, |
737 | parent_tidptr, child_tidptr); | 738 | parent_tidptr, child_tidptr); |
738 | } | 739 | } |
740 | |||
741 | /* | ||
742 | * Implement the event wait interface for the eventpoll file. It is the kernel | ||
743 | * part of the user space epoll_pwait(2). | ||
744 | */ | ||
745 | asmlinkage long compat_sys_epoll_pwait(int epfd, | ||
746 | struct epoll_event __user *events, int maxevents, int timeout, | ||
747 | const compat_sigset_t __user *sigmask, size_t sigsetsize) | ||
748 | { | ||
749 | int error; | ||
750 | sigset_t ksigmask, sigsaved; | ||
751 | |||
752 | /* | ||
753 | * If the caller wants a certain signal mask to be set during the wait, | ||
754 | * we apply it here. | ||
755 | */ | ||
756 | if (sigmask) { | ||
757 | if (sigsetsize != sizeof(sigset_t)) | ||
758 | return -EINVAL; | ||
759 | if (!access_ok(VERIFY_READ, sigmask, sizeof(ksigmask))) | ||
760 | return -EFAULT; | ||
761 | if (__copy_conv_sigset_from_user(&ksigmask, sigmask)) | ||
762 | return -EFAULT; | ||
763 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | ||
764 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | ||
765 | } | ||
766 | |||
767 | error = sys_epoll_wait(epfd, events, maxevents, timeout); | ||
768 | |||
769 | /* | ||
770 | * If we changed the signal mask, we need to restore the original one. | ||
771 | * In case we've got a signal while waiting, we do not restore the | ||
772 | * signal mask yet, and we allow do_signal() to deliver the signal on | ||
773 | * the way back to userspace, before the signal mask is restored. | ||
774 | */ | ||
775 | if (sigmask) { | ||
776 | if (error == -EINTR) { | ||
777 | memcpy(¤t->saved_sigmask, &sigsaved, | ||
778 | sizeof(sigsaved)); | ||
779 | set_thread_flag(TIF_RESTORE_SIGMASK); | ||
780 | } else | ||
781 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | ||
782 | } | ||
783 | |||
784 | return error; | ||
785 | } | ||