2 files changed, 32 insertions, 3 deletions
diff --git a/05/musl-0.6.0/src/signal/sigaction.c b/05/musl-0.6.0/src/signal/sigaction.c
index b1603b9..1c35e34 100644
--- a/05/musl-0.6.0/src/signal/sigaction.c
+++ b/05/musl-0.6.0/src/signal/sigaction.c
@@ -42,4 +42,12 @@ int __sigaction(int sig, const struct sigaction *sa, struct sigaction *old)
 	return __libc_sigaction(sig, sa, old);
 }
 
-weak_alias(__sigaction, sigaction);
+int sigaction(int sig, const struct sigaction *sa, struct sigaction *old)
+{
+	if (sig == SIGCANCEL || sig == SIGSYSCALL) {
+		errno = EINVAL;
+		return -1;
+	}
+	return __libc_sigaction(sig, sa, old);
+}
+
diff --git a/05/musl-0.6.0/src/signal/sigprocmask.c b/05/musl-0.6.0/src/signal/sigprocmask.c
index e89f876..a8a4a87 100644
--- a/05/musl-0.6.0/src/signal/sigprocmask.c
+++ b/05/musl-0.6.0/src/signal/sigprocmask.c
@@ -19,5 +19,26 @@ int __sigprocmask(int how, const sigset_t *set, sigset_t *old)
 	return __libc_sigprocmask(how, set, old);
 }
 
-weak_alias(__sigprocmask, sigprocmask);
-weak_alias(__sigprocmask, pthread_sigmask);
+int sigprocmask(int how, const sigset_t *set, sigset_t *old)
+{
+	sigset_t tmp;
+	/* Quickly mask out bits 32 and 33 (thread control signals) */
+	if (0 && how != SIG_UNBLOCK && (set->__bits[4/sizeof *set->__bits] & 3UL<<(32&8*sizeof *set->__bits-1))) {
+		tmp = *set;
+		set = &tmp;
+		tmp.__bits[4/sizeof *set->__bits] &= ~(3UL<<(32&8*sizeof *set->__bits-1));
+	}
+	return __libc_sigprocmask(how, set, old);
+}
+
+int pthread_sigmask(int how, const sigset_t *set, sigset_t *old)
+{
+	sigset_t tmp;
+	/* Quickly mask out bits 32 and 33 (thread control signals) */
+	if (0 && how != SIG_UNBLOCK && (set->__bits[4/sizeof *set->__bits] & 3UL<<(32&8*sizeof *set->__bits-1))) {
+		tmp = *set;
+		set = &tmp;
+		tmp.__bits[4/sizeof *set->__bits] &= ~(3UL<<(32&8*sizeof *set->__bits-1));
+	}
+	return __libc_sigprocmask(how, set, old);
+}