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authorPaul Mundt <lethal@linux-sh.org>2007-05-14 09:12:39 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-05-14 09:12:39 +0900
commitc18fe9a0467afaec7de05ec76cd994ae7c866760 (patch)
tree4f469753ff8829c50bd26b6be32526824040c508 /arch/sh64/kernel
parent599c26d32950c33bdd2a5ac6939bfe15ecf057e0 (diff)
sh64: ppoll/pselect6() and restartable syscalls.
This patch was hanging around for some time while we were waiting for the compiler situation to improve.. now that all is well again, finally merge it. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh64/kernel')
-rw-r--r--arch/sh64/kernel/entry.S4
-rw-r--r--arch/sh64/kernel/signal.c33
2 files changed, 31 insertions, 6 deletions
diff --git a/arch/sh64/kernel/entry.S b/arch/sh64/kernel/entry.S
index 40d45346248..7013fcb6665 100644
--- a/arch/sh64/kernel/entry.S
+++ b/arch/sh64/kernel/entry.S
@@ -947,14 +947,14 @@ ret_with_reschedule:
! FIXME:!!!
! no handling of TIF_SYSCALL_TRACE yet!!
- movi (1 << TIF_NEED_RESCHED), r8
+ movi _TIF_NEED_RESCHED, r8
and r8, r7, r8
pta work_resched, tr0
bne r8, ZERO, tr0
pta restore_all, tr1
- movi (1 << TIF_SIGPENDING), r8
+ movi (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r8
and r8, r7, r8
pta work_notifysig, tr0
bne r8, ZERO, tr0
diff --git a/arch/sh64/kernel/signal.c b/arch/sh64/kernel/signal.c
index b76bdfa473d..c8525ade056 100644
--- a/arch/sh64/kernel/signal.c
+++ b/arch/sh64/kernel/signal.c
@@ -698,7 +698,9 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
if (try_to_freeze())
goto no_signal;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else if (!oldset)
oldset = &current->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, 0);
@@ -706,6 +708,15 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
if (signr > 0) {
/* Whee! Actually deliver the signal. */
handle_signal(signr, &info, &ka, oldset, regs);
+
+ /*
+ * If a signal was successfully delivered, the saved sigmask
+ * is in its frame, and we can clear the TIF_RESTORE_SIGMASK
+ * flag.
+ */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+
return 1;
}
@@ -713,13 +724,27 @@ no_signal:
/* Did we come from a system call? */
if (regs->syscall_nr >= 0) {
/* Restart the system call - no handlers present */
- if (regs->regs[REG_RET] == -ERESTARTNOHAND ||
- regs->regs[REG_RET] == -ERESTARTSYS ||
- regs->regs[REG_RET] == -ERESTARTNOINTR) {
+ switch (regs->regs[REG_RET]) {
+ case -ERESTARTNOHAND:
+ case -ERESTARTSYS:
+ case -ERESTARTNOINTR:
/* Decode Syscall # */
regs->regs[REG_RET] = regs->syscall_nr;
regs->pc -= 4;
+ break;
+
+ case -ERESTART_RESTARTBLOCK:
+ regs->regs[REG_RET] = __NR_restart_syscall;
+ regs->pc -= 4;
+ break;
}
}
+
+ /* No signal to deliver -- put the saved sigmask back */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
+
return 0;
}