1 files changed, 35 insertions, 0 deletions

diff --git a/arch/um/os-Linux/tls.c b/arch/um/os-Linux/tls.c
new file mode 100644
index 00000000000..73277801ef1
--- /dev/null
+++ b/arch/um/os-Linux/tls.c
@@ -0,0 +1,35 @@
+#include <errno.h>
+#include <sys/ptrace.h>
+#include "sysdep/tls.h"
+
+/* TLS support - we basically rely on the host's one.*/
+
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
+#ifndef PTRACE_SET_THREAD_AREA
+#define PTRACE_SET_THREAD_AREA 26
+#endif
+
+int os_set_thread_area(user_desc_t *info, int pid)
+{
+        int ret;
+
+        ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,
+                     (unsigned long) info);
+        if (ret < 0)
+                ret = -errno;
+        return ret;
+}
+
+int os_get_thread_area(user_desc_t *info, int pid)
+{
+        int ret;
+
+        ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,
+                     (unsigned long) info);
+        if (ret < 0)
+                ret = -errno;
+        return ret;
+}