re-enable vdso clock_gettime on arm (32-bit) with workaround

[musl] / src / thread / synccall.c

diff --git a/src/thread/synccall.c b/src/thread/synccall.c
index 648a6ad..a6b177c 100644 (file)
--- a/src/thread/synccall.c
+++ b/src/thread/synccall.c
@@ -45,7 +45,7 @@ void __synccall(void (*func)(void *), void *ctx)
 {
        sigset_t oldmask;
        int cs, i, r;
-       struct sigaction sa = { .sa_flags = SA_RESTART, .sa_handler = handler };
+       struct sigaction sa = { .sa_flags = SA_RESTART | SA_ONSTACK, .sa_handler = handler };
        pthread_t self = __pthread_self(), td;
        int count = 0;
 
@@ -63,7 +63,8 @@ void __synccall(void (*func)(void *), void *ctx)
        sem_init(&target_sem, 0, 0);
        sem_init(&caller_sem, 0, 0);
 
-       if (!libc.threads_minus_1) goto single_threaded;
+       if (!libc.threads_minus_1 || __syscall(SYS_gettid) != self->tid)
+               goto single_threaded;
 
        callback = func;
        context = ctx;