cdefs.h revision 1.8 
1/* $NetBSD: cdefs.h,v 1.8 1997/04/07 23:40:16 cgd 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 _MACHINE_CDEFS_H_
31#define	_MACHINE_CDEFS_H_
32
33#define	_C_LABEL(x)	_STRING(x)
34
35#ifdef __ELF__
36
37#define	__DO_NOT_DO_WEAK__		/* NO WEAK SYMS IN LIBC YET */
38
39#ifndef __DO_NOT_DO_WEAK__
40#define	__indr_reference(sym,alias)	/* nada, since we do weak refs */
41#endif /* !__DO_NOT_DO_WEAK__ */
42
43#ifdef __STDC__
44
45#ifndef __DO_NOT_DO_WEAK__
46#define	__weak_alias(alias,sym)						\
47    __asm__(".weak " #alias " ; " #alias " = " #sym)
48#endif /* !__DO_NOT_DO_WEAK__ */
49#define	__warn_references(sym,msg)					\
50    __asm__(".section .gnu.warning." #sym " ; .ascii \"" msg "\" ; .text")
51
52#else /* !__STDC__ */
53
54#ifndef __DO_NOT_DO_WEAK__
55#define	__weak_alias(alias,sym)						\
56    __asm__(".weak alias ; alias = sym")
57#endif /* !__DO_NOT_DO_WEAK__ */
58#define	__warn_references(sym,msg)					\
59    __asm__(".section .gnu.warning.sym ; .ascii msg ; .text")
60
61#endif /* !__STDC__ */
62
63#else /* !__ELF__ */
64
65/*
66 * Very little to do if not ELF: we support neither indirect or
67 * weak references, and don't do anything with warnings.
68 */
69
70#define	__warn_references(sym,msg)	/* nothing */
71
72#endif /* !__ELF__ */
73
74
75#ifdef _KERNEL
76
77#ifdef __ELF__
78
79#ifdef __STDC__
80#define	__KERNEL_SECTIONSTRING(_sec, _str)				\
81	__asm__(".section " #_sec " ; .asciz \"" _str "\" ; .text")
82#else
83#define	__KERNEL_SECTIONSTRING(_sec, _str)				\
84	__asm__(".section _sec ; .asciz _str ; .text")
85#endif
86
87#define	__KERNEL_RCSID(_n, _s)		__KERNEL_SECTIONSTRING(.ident, _s)
88#define	__KERNEL_COPYRIGHT(_n, _s)	__KERNEL_SECTIONSTRING(.copyright, _s)
89
90#else /* __ELF__ */
91
92#define	__KERNEL_RCSID(_n, _s)						\
93	static const char __CONCAT(rcsid,_n)[]				\
94	    __attribute__ ((unused)) = _s
95#define	__KERNEL_COPYRIGHT(_n, _s)					\
96	static const char __CONCAT(copyright,_n)[]			\
97	    __attribute__ ((unused)) = _s
98
99#endif /* __ELF__ */
100
101#ifdef NO_KERNEL_RCSIDS
102#undef __KERNEL_RCSID
103#define	__KERNEL_RCSID(_n, _s)		/* nothing */
104#endif
105
106#endif /* _KERNEL */
107
108#endif /* !_MACHINE_CDEFS_H_ */
109