xref: /linux/arch/x86/um/shared/sysdep/tls.h (revision ca55b2fef3a9373fcfc30f82fd26bc7fccbda732)
1 #ifndef _SYSDEP_TLS_H
2 #define _SYSDEP_TLS_H
3 
4 #ifdef __UM_HOST__
5 
6 /* Change name to avoid conflicts with the original one from <asm/ldt.h>, which
7  * may be named user_desc (but in 2.4 and in header matching its API was named
8  * modify_ldt_ldt_s). */
9 
10 typedef struct um_dup_user_desc {
11 	unsigned int  entry_number;
12 	unsigned int  base_addr;
13 	unsigned int  limit;
14 	unsigned int  seg_32bit:1;
15 	unsigned int  contents:2;
16 	unsigned int  read_exec_only:1;
17 	unsigned int  limit_in_pages:1;
18 	unsigned int  seg_not_present:1;
19 	unsigned int  useable:1;
20 #ifdef __x86_64__
21 	unsigned int  lm:1;
22 #endif
23 } user_desc_t;
24 
25 #else /* __UM_HOST__ */
26 
27 typedef struct user_desc user_desc_t;
28 
29 #endif /* __UM_HOST__ */
30 
31 extern int os_set_thread_area(user_desc_t *info, int pid);
32 extern int os_get_thread_area(user_desc_t *info, int pid);
33 
34 #ifdef __i386__
35 #define GDT_ENTRY_TLS_MIN_I386 6
36 #define GDT_ENTRY_TLS_MIN_X86_64 12
37 #endif
38 
39 #endif /* _SYSDEP_TLS_H */
40