From 2c074b0d6cb2b28c5d1c0ccb2809965f4676efeb Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Fri, 26 Apr 2013 19:48:01 -0400
Subject: transition to using functions for internal signal blocking/restoring

there are several reasons for this change. one is getting rid of the
repetition of the syscall signature all over the place. another is
sharing the constant masks without costly GOT accesses in PIC.

the main motivation, however, is accurately representing whether we
want to block signals that might be handled by the application, or all
signals.
---
 src/signal/block.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/signal/block.c

(limited to 'src/signal/block.c')

diff --git a/src/signal/block.c b/src/signal/block.c
new file mode 100644
index 00000000..d7f61001
--- /dev/null
+++ b/src/signal/block.c
@@ -0,0 +1,44 @@
+#include "pthread_impl.h"
+#include "syscall.h"
+#include <signal.h>
+
+static const unsigned long all_mask[] = {
+#if ULONG_MAX == 0xffffffff && _NSIG == 129
+	-1UL, -1UL, -1UL, -1UL
+#elif ULONG_MAX == 0xffffffff
+	-1UL, -1UL
+#else
+	-1UL
+#endif
+};
+
+static const unsigned long app_mask[] = {
+#if ULONG_MAX == 0xffffffff
+#if _NSIG == 65
+	0x7fffffff, 0xfffffffc
+#else
+	0x7fffffff, 0xfffffffc, -1UL, -1UL
+#endif
+#else
+#if _NSIG == 65
+	0xfffffffc7fffffff
+#else
+	0xfffffffc7fffffff, -1UL
+#endif
+#endif
+};
+
+void __block_all_sigs(void *set)
+{
+	__syscall(SYS_rt_sigprocmask, SIG_BLOCK, &all_mask, set, _NSIG/8);
+}
+
+void __block_app_sigs(void *set)
+{
+	__syscall(SYS_rt_sigprocmask, SIG_BLOCK, &app_mask, set, _NSIG/8);
+}
+
+void __restore_sigs(void *set)
+{
+	__syscall(SYS_rt_sigprocmask, SIG_SETMASK, set, 0, _NSIG/8);
+}
-- 
cgit v1.2.1