rtld: increase TLS storage space (bug 2566)
[dragonfly.git] / sys / cpu / x86_64 / include / tls.h
CommitLineData
fc3f9779 1/*
c8fe38ae 2 * Copyright (c) 2005,2008 The DragonFly Project. All rights reserved.
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3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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
13 * distribution.
14 * 3. Neither the name of The DragonFly Project nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific, prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
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30 */
31
32#ifndef _CPU_TLS_H_
33#define _CPU_TLS_H_
34
35#ifndef _SYS_TYPES_H_
36#include <sys/types.h>
37#endif
38#ifndef _SYS_TLS_H_
39#include <sys/tls.h>
40#endif
41
42/*
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.
46 *
47 * Outside of this file, the system call layer generation will hardwire
48 * the offset for tcb_errno.
49 */
50struct tls_tcb {
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 */
55 void *tcb_unused[4];
56};
57
58struct tls_dtv {
59 uintptr_t dtv_generation;
60 uintptr_t dtv_max_index;
61 void *dtv_offset[__ARRAY_ZERO];
62};
63
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)
4b2454d1 67#define RTLD_STATIC_TLS_EXTRA 1280
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68#define RTLD_STATIC_TLS_VARIANT_II
69
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70/* Get the current TCB. */
71static __inline struct tls_tcb *
72tls_get_tcb(void)
73{
74 void *self;
75
76 __asm __volatile ("movq %%fs:%1, %0"
77 : "=r" (self)
78 : "m" (((struct tls_tcb *)0)->tcb_self));
79
80 return(self);
81}
82
83/* Get the current thread. */
84static __inline void *
85tls_get_curthread(void)
86{
87 void *self;
88
89 __asm __volatile ("movq %%fs:%1, %0"
90 : "=r" (self)
91 : "m" (((struct tls_tcb *)0)->tcb_pthread));
92
93 return(self);
94}
95
96static __inline void
97tls_set_tcb(struct tls_tcb *tcb)
98{
99 struct tls_info info;
100 int seg;
101
102 info.base = tcb;
103 info.size = -1;
104 seg = set_tls_area(0, &info, sizeof(info));
c8fe38ae 105 /*__asm __volatile("movl %0, %%fs" : : "r" (seg));*/
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106}
107
a293ac08
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108static __inline void
109tls_set_gs(void *base, size_t bytes)
110{
111 struct tls_info info;
112 int seg;
113
114 info.base = base;
115 info.size = bytes;
116 seg = set_tls_area(1, &info, sizeof(info));
117 /*__asm __volatile("mov %0, %%fs" : : "g" (seg));*/
118}
119
120#ifndef _KERNEL
121
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122struct tls_tcb *_rtld_allocate_tls(void);
123struct tls_tcb *_libc_allocate_tls(void);
124void _rtld_free_tls(struct tls_tcb *);
125void _libc_free_tls(struct tls_tcb *);
126void _rtld_call_init(void);
127struct tls_tcb *_libc_init_tls(void);
128struct tls_tcb *_init_tls(void);
129
130#endif
131
132#endif /* !_CPU_TLS_H_ */