FreeBSD/Linux Kernel Cross Reference
sys/sys/cdefs_elf.h
1 /* $NetBSD: cdefs_elf.h,v 1.17 2003/10/29 21:56:02 mycroft 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 #define __weak_extern(sym) \
63 __asm__(".weak " _C_LABEL_STRING(#sym));
64 #define __warn_references(sym,msg) \
65 __asm__(".section .gnu.warning." #sym "\n\t.ascii \"" msg "\"\n\t.text");
66
67 #else /* !__STDC__ */
68
69 #ifdef __LEADING_UNDERSCORE
70 #define __weak_alias(alias,sym) ___weak_alias(_/**/alias,_/**/sym)
71 #define ___weak_alias(alias,sym) \
72 __asm__(".weak alias\nalias = sym");
73 #else
74 #define __weak_alias(alias,sym) \
75 __asm__(".weak alias\nalias = sym");
76 #endif
77 #ifdef __LEADING_UNDERSCORE
78 #define __weak_extern(sym) ___weak_extern(_/**/sym)
79 #define ___weak_extern(sym) \
80 __asm__(".weak sym");
81 #else
82 #define __weak_extern(sym) \
83 __asm__(".weak sym");
84 #endif
85 #define __warn_references(sym,msg) \
86 __asm__(".section .gnu.warning.sym\n\t.ascii msg ; .text");
87
88 #endif /* !__STDC__ */
89
90 #if __STDC__
91 #define __SECTIONSTRING(_sec, _str) \
92 __asm__(".section " #_sec "\n\t.asciz \"" _str "\"\n\t.previous")
93 #else
94 #define __SECTIONSTRING(_sec, _str) \
95 __asm__(".section _sec\n\t.asciz _str\n\t.previous")
96 #endif
97
98 #define __IDSTRING(_n,_s) __SECTIONSTRING(.ident,_s)
99
100 #define __RCSID(_s) __IDSTRING(rcsid,_s)
101 #define __SCCSID(_s)
102 #define __SCCSID2(_s)
103 #if 0 /* XXX userland __COPYRIGHTs have \ns in them */
104 #define __COPYRIGHT(_s) __SECTIONSTRING(.copyright,_s)
105 #else
106 #define __COPYRIGHT(_s) \
107 static const char copyright[] __attribute__((__unused__)) = _s
108 #endif
109
110 #define __KERNEL_RCSID(_n, _s) __RCSID(_s)
111 #define __KERNEL_SCCSID(_n, _s)
112 #if 0 /* XXX see above */
113 #define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s)
114 #else
115 #define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s)
116 #endif
117
118 #ifndef __lint__
119 #define __link_set_make_entry(set, sym) \
120 static void const * const __link_set_##set##_sym_##sym \
121 __section("link_set_" #set) __unused = &sym
122 #else
123 #define __link_set_make_entry(set, sym) \
124 extern void const * const __link_set_##set##_sym_##sym
125 #endif /* __lint__ */
126
127 #define __link_set_add_text(set, sym) __link_set_make_entry(set, sym)
128 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
129 #define __link_set_add_data(set, sym) __link_set_make_entry(set, sym)
130 #define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym)
131
132 #define __link_set_decl(set, ptype) \
133 extern ptype *__start_link_set_##set; \
134 extern ptype *__stop_link_set_##set
135
136 #define __link_set_start(set) (&__start_link_set_##set)
137 #define __link_set_end(set) (&__stop_link_set_##set)
138
139 #define __link_set_count(set) \
140 (__link_set_end(set) - __link_set_start(set))
141
142 #endif /* !_SYS_CDEFS_ELF_H_ */
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