2 * Copyright (c) 2005,2008 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
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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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21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/types.h>
43 * NOTE: the tcb_{self,dtv,pthread,errno) fields must be declared
44 * in the structure in the specified order as assembly will access the
45 * fields with a hardwired offset.
47 * Outside of this file, the system call layer generation will hardwire
48 * the offset for tcb_errno.
51 struct tls_tcb *tcb_self; /* pointer to self*/
52 void *tcb_dtv; /* Dynamic Thread Vector */
53 void *tcb_pthread; /* thread library's data*/
54 int *tcb_errno_p; /* pointer to per-thread errno */
59 uintptr_t dtv_generation;
60 uintptr_t dtv_max_index;
61 void *dtv_offset[__ARRAY_ZERO];
64 #define RTLD_TCB_HAS_SELF_POINTER
65 #define RTLD_STATIC_TLS_ALIGN 16
66 #define RTLD_STATIC_TLS_ALIGN_MASK (RTLD_STATIC_TLS_ALIGN - 1)
67 #define RTLD_STATIC_TLS_EXTRA 256
68 #define RTLD_STATIC_TLS_VARIANT_II
70 /* Get the current TCB. */
71 static __inline struct tls_tcb *
76 __asm __volatile ("movq %%fs:%1, %0"
78 : "m" (((struct tls_tcb *)0)->tcb_self));
83 /* Get the current thread. */
84 static __inline void *
85 tls_get_curthread(void)
89 __asm __volatile ("movq %%fs:%1, %0"
91 : "m" (((struct tls_tcb *)0)->tcb_pthread));
97 tls_set_tcb(struct tls_tcb *tcb)
104 seg = set_tls_area(0, &info, sizeof(info));
105 /*__asm __volatile("movl %0, %%fs" : : "r" (seg));*/
109 tls_set_gs(void *base, size_t bytes)
111 struct tls_info info;
116 seg = set_tls_area(1, &info, sizeof(info));
117 /*__asm __volatile("mov %0, %%fs" : : "g" (seg));*/
122 struct tls_tcb *_rtld_allocate_tls(void);
123 struct tls_tcb *_libc_allocate_tls(void);
124 void _rtld_free_tls(struct tls_tcb *);
125 void _libc_free_tls(struct tls_tcb *);
126 void _rtld_call_init(void);
127 struct tls_tcb *_libc_init_tls(void);
128 struct tls_tcb *_init_tls(void);
132 #endif /* !_CPU_TLS_H_ */