FreeBSD/Linux Kernel Cross Reference
sys/sys/cdefs_elf.h
1 /* $NetBSD: cdefs_elf.h,v 1.30 2008/07/21 15:22:19 lukem Exp $ */
2
3 /*
4 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30 #ifndef _SYS_CDEFS_ELF_H_
31 #define _SYS_CDEFS_ELF_H_
32
33 #ifdef __LEADING_UNDERSCORE
34 #define _C_LABEL(x) __CONCAT(_,x)
35 #define _C_LABEL_STRING(x) "_"x
36 #else
37 #define _C_LABEL(x) x
38 #define _C_LABEL_STRING(x) x
39 #endif
40
41 #if __STDC__
42 #define ___RENAME(x) __asm(___STRING(_C_LABEL(x)))
43 #else
44 #ifdef __LEADING_UNDERSCORE
45 #define ___RENAME(x) ____RENAME(_/**/x)
46 #define ____RENAME(x) __asm(___STRING(x))
47 #else
48 #define ___RENAME(x) __asm(___STRING(x))
49 #endif
50 #endif
51
52 #define __indr_reference(sym,alias) /* nada, since we do weak refs */
53
54 #if __STDC__
55 #define __strong_alias(alias,sym) \
56 __asm(".global " _C_LABEL_STRING(#alias) "\n" \
57 _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
58
59 #define __weak_alias(alias,sym) \
60 __asm(".weak " _C_LABEL_STRING(#alias) "\n" \
61 _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
62
63 /* Do not use __weak_extern, use __weak_reference instead */
64 #define __weak_extern(sym) \
65 __asm(".weak " _C_LABEL_STRING(#sym));
66
67 #if __GNUC_PREREQ__(4, 0)
68 #define __weak_reference(sym) __attribute__((__weakref__))
69 #else
70 #define __weak_reference(sym) ; __asm(".weak " _C_LABEL_STRING(#sym))
71 #endif
72
73 #define __warn_references(sym,msg) \
74 __asm(".pushsection .gnu.warning." #sym "\n" \
75 ".ascii \"" msg "\"\n" \
76 ".popsection");
77
78 #else /* !__STDC__ */
79
80 #ifdef __LEADING_UNDERSCORE
81 #define __weak_alias(alias,sym) ___weak_alias(_/**/alias,_/**/sym)
82 #define ___weak_alias(alias,sym) \
83 __asm(".weak alias\nalias = sym");
84 #else
85 #define __weak_alias(alias,sym) \
86 __asm(".weak alias\nalias = sym");
87 #endif
88 #ifdef __LEADING_UNDERSCORE
89 #define __weak_extern(sym) ___weak_extern(_/**/sym)
90 #define ___weak_extern(sym) \
91 __asm(".weak sym");
92 #else
93 #define __weak_extern(sym) \
94 __asm(".weak sym");
95 #endif
96 #define __warn_references(sym,msg) \
97 __asm(".pushsection .gnu.warning.sym\n" \
98 ".ascii \"" msg "\"\n" \
99 ".popsection");
100
101 #endif /* !__STDC__ */
102
103 #if __STDC__
104 #define __SECTIONSTRING(_sec, _str) \
105 __asm(".pushsection " #_sec "\n" \
106 ".asciz \"" _str "\"\n" \
107 ".popsection")
108 #else
109 #define __SECTIONSTRING(_sec, _str) \
110 __asm(".pushsection _sec\n" \
111 ".asciz \"" _str "\"\n" \
112 ".popsection")
113 #endif
114
115 #define __IDSTRING(_n,_s) __SECTIONSTRING(.ident,_s)
116
117 #define __RCSID(_s) __IDSTRING(rcsid,_s)
118 #define __SCCSID(_s)
119 #define __SCCSID2(_s)
120 #define __COPYRIGHT(_s) __SECTIONSTRING(.copyright,_s)
121
122 #define __KERNEL_RCSID(_n, _s) __RCSID(_s)
123 #define __KERNEL_SCCSID(_n, _s)
124 #define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s)
125
126 #ifndef __lint__
127 #define __link_set_make_entry(set, sym) \
128 static void const * const __link_set_##set##_sym_##sym \
129 __section("link_set_" #set) __used = &sym
130 #define __link_set_make_entry2(set, sym, n) \
131 static void const * const __link_set_##set##_sym_##sym##_##n \
132 __section("link_set_" #set) __used = &sym[n]
133 #else
134 #define __link_set_make_entry(set, sym) \
135 extern void const * const __link_set_##set##_sym_##sym
136 #define __link_set_make_entry2(set, sym, n) \
137 extern void const * const __link_set_##set##_sym_##sym##_##n
138 #endif /* __lint__ */
139
140 #define __link_set_add_text(set, sym) __link_set_make_entry(set, sym)
141 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
142 #define __link_set_add_data(set, sym) __link_set_make_entry(set, sym)
143 #define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym)
144 #define __link_set_add_text2(set, sym, n) __link_set_make_entry2(set, sym, n)
145 #define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n)
146 #define __link_set_add_data2(set, sym, n) __link_set_make_entry2(set, sym, n)
147 #define __link_set_add_bss2(set, sym, n) __link_set_make_entry2(set, sym, n)
148
149 #define __link_set_decl(set, ptype) \
150 extern ptype * const __start_link_set_##set[]; \
151 extern ptype * const __stop_link_set_##set[] \
152
153 #define __link_set_start(set) (__start_link_set_##set)
154 #define __link_set_end(set) (__stop_link_set_##set)
155
156 #define __link_set_count(set) \
157 (__link_set_end(set) - __link_set_start(set))
158
159 #endif /* !_SYS_CDEFS_ELF_H_ */
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