1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SYSDEP_TLS_H
3 #define _SYSDEP_TLS_H
4
5 #ifdef __UM_HOST__
6
7 /* Change name to avoid conflicts with the original one from <asm/ldt.h>, which
8 * may be named user_desc (but in 2.4 and in header matching its API was named
9 * modify_ldt_ldt_s). */
10
11 typedef struct um_dup_user_desc {
12 unsigned int entry_number;
13 unsigned int base_addr;
14 unsigned int limit;
15 unsigned int seg_32bit:1;
16 unsigned int contents:2;
17 unsigned int read_exec_only:1;
18 unsigned int limit_in_pages:1;
19 unsigned int seg_not_present:1;
20 unsigned int useable:1;
21 #ifdef __x86_64__
22 unsigned int lm:1;
23 #endif
24 } user_desc_t;
25
26 #else /* __UM_HOST__ */
27
28 typedef struct user_desc user_desc_t;
29
30 #endif /* __UM_HOST__ */
31
32 extern int os_set_thread_area(user_desc_t *info, int pid);
33 extern int os_get_thread_area(user_desc_t *info, int pid);
34
35 #ifdef __i386__
36 #define GDT_ENTRY_TLS_MIN_I386 6
37 #define GDT_ENTRY_TLS_MIN_X86_64 12
38 #endif
39
40 #endif /* _SYSDEP_TLS_H */
41
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