2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
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5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
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16 * from this software without specific, prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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31 * $DragonFly: src/sys/amd64/include/Attic/tls.h,v 1.1 2006/07/27 00:42:46 corecode Exp $
34 #ifndef _MACHINE_TLS_H_
35 #define _MACHINE_TLS_H_
38 #include <sys/types.h>
45 * NOTE: the tcb_{self,dtv,pthread,errno) fields must be declared
46 * in the structure in the specified order as assembly will access the
47 * fields with a hardwired offset.
49 * Outside of this file, the system call layer generation will hardwire
50 * the offset for tcb_errno.
53 struct tls_tcb *tcb_self; /* pointer to self*/
54 void *tcb_dtv; /* Dynamic Thread Vector */
55 void *tcb_pthread; /* thread library's data*/
56 int *tcb_errno_p; /* pointer to per-thread errno */
61 uintptr_t dtv_generation;
62 uintptr_t dtv_max_index;
63 void *dtv_offset[__ARRAY_ZERO];
66 #define RTLD_TCB_HAS_SELF_POINTER
67 #define RTLD_STATIC_TLS_ALIGN 16
68 #define RTLD_STATIC_TLS_ALIGN_MASK (RTLD_STATIC_TLS_ALIGN - 1)
69 #define RTLD_STATIC_TLS_EXTRA 256
70 #define RTLD_STATIC_TLS_VARIANT_II
74 /* Get the current TCB. */
75 static __inline struct tls_tcb *
80 __asm __volatile ("movq %%fs:%1, %0"
82 : "m" (((struct tls_tcb *)0)->tcb_self));
87 /* Get the current thread. */
88 static __inline void *
89 tls_get_curthread(void)
93 __asm __volatile ("movq %%fs:%1, %0"
95 : "m" (((struct tls_tcb *)0)->tcb_pthread));
101 tls_set_tcb(struct tls_tcb *tcb)
103 struct tls_info info;
108 seg = sys_set_tls_area(0, &info, sizeof(info));
109 __asm __volatile("movl %0, %%fs" : : "r" (seg));
112 struct tls_tcb *_rtld_allocate_tls(void);
113 struct tls_tcb *_libc_allocate_tls(void);
114 void _rtld_free_tls(struct tls_tcb *);
115 void _libc_free_tls(struct tls_tcb *);
116 void _rtld_call_init(void);
117 struct tls_tcb *_libc_init_tls(void);
118 struct tls_tcb *_init_tls(void);
122 #endif /* !_MACHINE_TLS_H_ */