1/*
2 * Copyright 2019, Data61
3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
4 * ABN 41 687 119 230.
5 *
6 * This software may be distributed and modified according to the terms of
7 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
8 * See "LICENSE_BSD2.txt" for details.
9 *
10 * @TAG(DATA61_BSD)
11 */
12#include <autoconf.h>
13#include <sel4runtime/stdint.h>
14
15/*
16 * Obtain the value of the TLS base for the current thread.
17 */
18static inline sel4runtime_uintptr_t sel4runtime_get_tls_base(void)
19{
20    sel4runtime_uintptr_t tp;
21    __asm__ __volatile__("movl %%gs:0,%0" : "=r"(tp));
22    return tp;
23}
24
25#ifdef CONFIG_SET_TLS_BASE_SELF
26/*
27 * Set the value of the TLS base for the current thread.
28 */
29static inline void sel4runtime_set_tls_base(sel4runtime_uintptr_t tls_base)
30{
31    seL4_SetTLSBase(tls_base);
32}
33#else
34#error "Set TLS for ia32 not implemented"
35#endif /* CONFIG_SET_TLS_BASE_SELF */
36