diff --git a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h
index 586e5816d..576ffcf30 100644
--- a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h
+++ b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h
@@ -264,37 +264,6 @@ typedef uint8_t __wasi_sdflags_t;
 typedef uint16_t __wasi_siflags_t;
 
 typedef uint8_t __wasi_signal_t;
-// 0 is reserved; POSIX has special semantics for kill(pid, 0).
-#define __WASI_SIGHUP    (1)
-#define __WASI_SIGINT    (2)
-#define __WASI_SIGQUIT   (3)
-#define __WASI_SIGILL    (4)
-#define __WASI_SIGTRAP   (5)
-#define __WASI_SIGABRT   (6)
-#define __WASI_SIGBUS    (7)
-#define __WASI_SIGFPE    (8)
-#define __WASI_SIGKILL   (9)
-#define __WASI_SIGUSR1   (10)
-#define __WASI_SIGSEGV   (11)
-#define __WASI_SIGUSR2   (12)
-#define __WASI_SIGPIPE   (13)
-#define __WASI_SIGALRM   (14)
-#define __WASI_SIGTERM   (15)
-#define __WASI_SIGCHLD   (16)
-#define __WASI_SIGCONT   (17)
-#define __WASI_SIGSTOP   (18)
-#define __WASI_SIGTSTP   (19)
-#define __WASI_SIGTTIN   (20)
-#define __WASI_SIGTTOU   (21)
-#define __WASI_SIGURG    (22)
-#define __WASI_SIGXCPU   (23)
-#define __WASI_SIGXFSZ   (24)
-#define __WASI_SIGVTALRM (25)
-#define __WASI_SIGPROF   (26)
-#define __WASI_SIGWINCH  (27)
-#define __WASI_SIGPOLL   (28)
-#define __WASI_SIGPWR    (29)
-#define __WASI_SIGSYS    (30)
 
 typedef uint16_t __wasi_subclockflags_t;
 #define __WASI_SUBSCRIPTION_CLOCK_ABSTIME (0x0001)
@@ -986,20 +955,6 @@ __wasi_errno_t wasmtime_ssp_poll_oneoff(
     size_t *nevents
 ) WASMTIME_SSP_SYSCALL_NAME(poll_oneoff) __attribute__((__warn_unused_result__));
 
-#if 0
-/**
- * We throw exception in libc-wasi wrapper function wasi_proc_exit()
- * but not call this function.
- */
-_Noreturn void wasmtime_ssp_proc_exit(
-    __wasi_exitcode_t rval
-) WASMTIME_SSP_SYSCALL_NAME(proc_exit);
-#endif
-
-__wasi_errno_t wasmtime_ssp_proc_raise(
-    __wasi_signal_t sig
-) WASMTIME_SSP_SYSCALL_NAME(proc_raise) __attribute__((__warn_unused_result__));
-
 __wasi_errno_t wasmtime_ssp_random_get(
     void *buf,
     size_t buf_len
diff --git a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
index 3038e3d44..6fef381df 100644
--- a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
+++ b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
@@ -2787,123 +2787,6 @@ wasmtime_ssp_poll_oneoff(
     return error;
 }
 
-#if 0
-/**
- * We throw exception in libc-wasi wrapper function wasi_proc_exit()
- * but not call this function.
- */
-void wasmtime_ssp_proc_exit(
-    __wasi_exitcode_t rval
-) {
-  _Exit((int32)rval);
-}
-#endif
-
-__wasi_errno_t
-wasmtime_ssp_proc_raise(__wasi_signal_t sig)
-{
-    static const int signals[] = {
-#define X(v) [__WASI_##v] = v
-#if defined(SIGABRT)
-        X(SIGABRT),
-#endif
-#if defined(SIGALRM)
-        X(SIGALRM),
-#endif
-#if defined(SIGBUS)
-        X(SIGBUS),
-#endif
-#if defined(SIGCHLD)
-        X(SIGCHLD),
-#endif
-#if defined(SIGCONT)
-        X(SIGCONT),
-#endif
-#if defined(SIGFPE)
-        X(SIGFPE),
-#endif
-#if defined(SIGHUP)
-        X(SIGHUP),
-#endif
-#if defined(SIGILL)
-        X(SIGILL),
-#endif
-#if defined(SIGINT)
-        X(SIGINT),
-#endif
-#if defined(SIGKILL)
-        X(SIGKILL),
-#endif
-#if defined(SIGPIPE)
-        X(SIGPIPE),
-#endif
-#if defined(SIGQUIT)
-        X(SIGQUIT),
-#endif
-#if defined(SIGSYS)
-        X(SIGSEGV),
-#endif
-#if defined(SIGSTOP)
-        X(SIGSTOP),
-#endif
-#if defined(SIGSYS)
-        X(SIGSYS),
-#endif
-#if defined(SIGTERM)
-        X(SIGTERM),
-#endif
-#if defined(SIGTRAP)
-        X(SIGTRAP),
-#endif
-#if defined(SIGTSTP)
-        X(SIGTSTP),
-#endif
-#if defined(SIGTTIN)
-        X(SIGTTIN),
-#endif
-#if defined(SIGTTOU)
-        X(SIGTTOU),
-#endif
-#if defined(SIGURG)
-        X(SIGURG),
-#endif
-#if defined(SIGUSR1)
-        X(SIGUSR1),
-#endif
-#if defined(SIGUSR2)
-        X(SIGUSR2),
-#endif
-#if defined(SIGVTALRM)
-        X(SIGVTALRM),
-#endif
-#if defined(SIGXCPU)
-        X(SIGXCPU),
-#endif
-#if defined(SIGXFSZ)
-        X(SIGXFSZ),
-#endif
-#undef X
-    };
-    if (sig >= sizeof(signals) / sizeof(signals[0]) || signals[sig] == 0)
-        return __WASI_EINVAL;
-
-#if CONFIG_TLS_USE_GSBASE
-    // TLS on OS X depends on installing a SIGSEGV handler. Reset SIGSEGV
-    // to the default action before raising.
-    if (sig == __WASI_SIGSEGV) {
-        struct sigaction sa = {
-            .sa_handler = SIG_DFL,
-        };
-        sigemptyset(&sa.sa_mask);
-        sigaction(SIGSEGV, &sa, NULL);
-    }
-#endif
-
-    if (raise(signals[sig]) < 0)
-        return convert_errno(errno);
-    return 0;
-}
-
 __wasi_errno_t
 wasmtime_ssp_random_get(void *buf, size_t nbyte)
 {
diff --git a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h
index 7f6e9b941..f5e130a9e 100644
--- a/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h
+++ b/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h
@@ -101,12 +101,6 @@
 #define st_mtim st_mtimespec
 #endif
 
-#ifdef __APPLE__
-#define CONFIG_TLS_USE_GSBASE 1
-#else
-#define CONFIG_TLS_USE_GSBASE 0
-#endif
-
 #if !defined(BH_PLATFORM_LINUX_SGX)
 /* Clang's __GNUC_PREREQ macro has a different meaning than GCC one,
 so we have to handle this case specially */