From fed7c9acdac3d17cfb319d30944270adadeedee9 Mon Sep 17 00:00:00 2001
From: zhangjing <zhangjing@ultrarisc.com>
Date: Tue, 22 Oct 2024 15:12:23 +0800
Subject: [PATCH] [src][signal]:fix issue with inconsistency between sig_mask
 and sigaddset implementations when using musl libc

---
 src/signal.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/signal.c b/src/signal.c
index ace2dd1f4c4..b33e24220e4 100644
--- a/src/signal.c
+++ b/src/signal.c
@@ -30,7 +30,11 @@
 #define DBG_LVL     DBG_WARNING
 #include <rtdbg.h>
 
-#define sig_mask(sig_no)    (1u << sig_no)
+#ifdef RT_USING_MUSLLIBC
+    #define sig_mask(sig_no)    (1u << (sig_no - 1))
+#else
+    #define sig_mask(sig_no)    (1u << sig_no)
+#endif
 #define sig_valid(sig_no)   (sig_no >= 0 && sig_no < RT_SIG_MAX)
 
 static struct rt_spinlock _thread_signal_lock = RT_SPINLOCK_INIT;