RTEMS  5.1
cdefs_elf.h
1 /* $NetBSD: cdefs_elf.h,v 1.24 2005/07/16 17:53:36 christos 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[] \
108  __attribute__((__unused__,__section__(".copyright"))) = _s
109 #endif
110 
111 #define __KERNEL_RCSID(_n, _s) __RCSID(_s)
112 #define __KERNEL_SCCSID(_n, _s)
113 #if 0 /* XXX see above */
114 #define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s)
115 #else
116 #define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s)
117 #endif
118 
119 #ifndef __lint__
120 #define __link_set_make_entry(set, sym) \
121  static void const * const __link_set_##set##_sym_##sym \
122  __section("link_set_" #set) __used = &sym
123 #define __link_set_make_entry2(set, sym, n) \
124  static void const * const __link_set_##set##_sym_##sym##_##n \
125  __section("link_set_" #set) __used = &sym[n]
126 #else
127 #define __link_set_make_entry(set, sym) \
128  extern void const * const __link_set_##set##_sym_##sym
129 #define __link_set_make_entry2(set, sym, n) \
130  extern void const * const __link_set_##set##_sym_##sym##_##n
131 #endif /* __lint__ */
132 
133 #define __link_set_add_text(set, sym) __link_set_make_entry(set, sym)
134 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
135 #define __link_set_add_data(set, sym) __link_set_make_entry(set, sym)
136 #define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym)
137 #define __link_set_add_text2(set, sym, n) __link_set_make_entry2(set, sym, n)
138 #define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n)
139 #define __link_set_add_data2(set, sym, n) __link_set_make_entry2(set, sym, n)
140 #define __link_set_add_bss2(set, sym, n) __link_set_make_entry2(set, sym, n)
141 
142 #define __link_set_decl(set, ptype) \
143  extern ptype * const __start_link_set_##set[]; \
144  extern ptype * const __stop_link_set_##set[] \
145 
146 #define __link_set_start(set) (__start_link_set_##set)
147 #define __link_set_end(set) (__stop_link_set_##set)
148 
149 #define __link_set_count(set) \
150  (__link_set_end(set) - __link_set_start(set))
151 
152 #endif /* !_SYS_CDEFS_ELF_H_ */
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