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authorDavid Woodhouse <dwmw2@infradead.org>2006-01-18 17:44:01 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-18 19:20:30 -0800
commitf27201da5c8f118cfe266f51447bdd108d5f081d (patch)
tree9d889f4afec179b5b6f422b58dd36fa7606f3eee /arch/powerpc/kernel/signal_32.c
parent283828f3c19ceb3a64a8544d42cc189003e8b0fe (diff)
[PATCH] TIF_RESTORE_SIGMASK support for arch/powerpc
Implement the TIF_RESTORE_SIGMASK flag in the new arch/powerpc kernel, for both 32-bit and 64-bit system call paths. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/powerpc/kernel/signal_32.c')
-rw-r--r--arch/powerpc/kernel/signal_32.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 7f0d5ce2567d..3747ab0dac3f 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1128,7 +1128,7 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
siginfo_t info;
struct k_sigaction ka;
- unsigned int frame, newsp;
+ unsigned int newsp;
int signr, ret;
#ifdef CONFIG_PPC32
@@ -1139,11 +1139,11 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
}
#endif
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else if (!oldset)
oldset = &current->blocked;
- newsp = frame = 0;
-
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
#ifdef CONFIG_PPC32
no_signal:
@@ -1173,8 +1173,14 @@ no_signal:
}
}
- if (signr == 0)
+ if (signr == 0) {
+ /* 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; /* no signals delivered */
+ }
if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
&& !on_sig_stack(regs->gpr[1]))
@@ -1207,6 +1213,10 @@ no_signal:
sigaddset(&current->blocked, signr);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
+ /* 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 ret;