RTEMS: cpukit/include/sys/cdefs_elf.h Source File

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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_ */