ldso: Initialize fully dtv before calling the constructors.

If a shared object has a constructor that accesses a TLS variable
using the localor global synamic access model (that is by calling
the __tls_get_addr function), all the filed of each dtv entry must be
already initialized to point to the right address in the TLS static block

Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/test/tls/tst-tlsmod16.c b/test/tls/tst-tlsmod16.c
new file mode 100644
index 000000000..bd04b5081
--- /dev/null
+++ b/test/tls/tst-tlsmod16.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <tls.h>
+
+#define TLS_VAR_INIT_VALUE 99
+
+#ifdef USE_TLS
+__thread int tls_var  __attribute__((tls_model("global-dynamic")));
+static __thread int local_tls_var __attribute__((tls_model("local-dynamic")));
+#endif
+
+void __attribute__((constructor)) libtls_ctor(void);
+void libtls_ctor(void)
+{
+	printf("libtls: constructor!\n");
+#ifdef USE_TLS
+	local_tls_var = TLS_VAR_INIT_VALUE;
+	tls_var = local_tls_var;
+#endif
+}
+
+void __attribute__((destructor)) libtls_dtor(void);
+void libtls_dtor(void)
+{
+	printf("libtls: destructor!\n");
+}