2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
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10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
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15 * contributors may be used to endorse or promote products derived
16 * from this software without specific, prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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31 * $DragonFly: src/sys/i386/include/Attic/tls.h,v 1.7 2005/06/03 17:14:50 dillon Exp $
34 #ifndef _MACHINE_TLS_H_
35 #define _MACHINE_TLS_H_
37 #include <sys/types.h>
41 * NOTE: the tcb_{self,dtv,pthread,errno) fields must be declared
42 * in the structure in the specified order as assembly will access the
43 * fields with a hardwired offset.
45 * Outside of this file, the system call layer generation will hardwire
46 * the offset for tcb_errno.
49 struct tls_tcb *tcb_self; /* pointer to self*/
50 void *tcb_dtv; /* Dynamic Thread Vector */
51 void *tcb_pthread; /* thread library's data*/
52 int *tcb_errno_p; /* pointer to per-thread errno */
57 uintptr_t dtv_generation;
58 uintptr_t dtv_max_index;
59 void *dtv_offset[__ARRAY_ZERO];
62 #define RTLD_TCB_HAS_SELF_POINTER
63 #define RTLD_STATIC_TLS_ALIGN 16
64 #define RTLD_STATIC_TLS_ALIGN_MASK (RTLD_STATIC_TLS_ALIGN - 1)
65 #define RTLD_STATIC_TLS_EXTRA 256
66 #define RTLD_STATIC_TLS_VARIANT_II
68 /* Get the current TCB. */
69 static __inline struct tls_tcb *
74 __asm __volatile ("movl %%gs:%1, %0"
76 : "m" (((struct tls_tcb *)0)->tcb_self));
81 /* Get the current thread. */
82 static __inline void *
83 tls_get_curthread(void)
87 __asm __volatile ("movl %%gs:%1, %0"
89 : "m" (((struct tls_tcb *)0)->tcb_pthread));
95 tls_set_tcb(struct tls_tcb *tcb)
102 seg = sys_set_tls_area(0, &info, sizeof(info));
103 __asm __volatile("movl %0, %%gs" : : "r" (seg));
106 struct tls_tcb *_rtld_allocate_tls(void);
107 struct tls_tcb *_libc_allocate_tls(void);
108 void _rtld_free_tls(struct tls_tcb *);
109 void _libc_free_tls(struct tls_tcb *);
110 void _rtld_call_init(void);
111 struct tls_tcb *_libc_init_tls(void);
112 struct tls_tcb *_init_tls(void);
114 #endif /* !_MACHINE_TLS_H_ */