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