cdefs_elf.h revision f79ee064b64af54bce6d3931f4112761edb7d3a9
1/* $NetBSD: cdefs_elf.h,v 1.22 2005/02/26 22:25:34 perry 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#define ___RENAME(x) __asm__(___STRING(_C_LABEL(x))) 42 43#define __indr_reference(sym,alias) /* nada, since we do weak refs */ 44 45#define __strong_alias(alias,sym) \ 46 __asm__(".global " _C_LABEL_STRING(#alias) "\n" \ 47 _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym)); 48 49#define __weak_alias(alias,sym) \ 50 __asm__(".weak " _C_LABEL_STRING(#alias) "\n" \ 51 _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym)); 52#define __weak_extern(sym) \ 53 __asm__(".weak " _C_LABEL_STRING(#sym)); 54 55/* We use __warnattr instead of __warn_references. 56 * TODO: remove this and put an empty definition in one of the upstream-* compatibility headers. 57 */ 58#define __warn_references(sym,msg) \ 59 /*__asm__(".section .gnu.warning." #sym "\n\t.ascii \"" msg "\"\n\t.text");*/ 60 61#define __SECTIONSTRING(_sec, _str) \ 62 __asm__(".section " #_sec "\n\t.asciz \"" _str "\"\n\t.previous") 63 64/* Used to tag non-static symbols that are private and never exposed by the shared library. */ 65#define __LIBC_HIDDEN__ __attribute__((visibility ("hidden"))) 66 67/* Like __LIBC_HIDDEN__, but preserves binary compatibility for LP32. */ 68#ifdef __LP64__ 69#define __LIBC64_HIDDEN__ __LIBC_HIDDEN__ 70#else 71#define __LIBC64_HIDDEN__ 72#endif 73 74/* Used to tag non-static symbols that are public and exposed by the shared library. */ 75#define __LIBC_ABI_PUBLIC__ __attribute__((visibility ("default"))) 76 77#define __IDSTRING(_n,_s) __SECTIONSTRING(.ident,_s) 78 79#define __RCSID(_s) __IDSTRING(rcsid,_s) 80#define __SCCSID(_s) 81#define __SCCSID2(_s) 82#if 0 /* XXX userland __COPYRIGHTs have \ns in them */ 83#define __COPYRIGHT(_s) __SECTIONSTRING(.copyright,_s) 84#else 85#define __COPYRIGHT(_s) \ 86 static const char copyright[] \ 87 __attribute__((__unused__,__section__(".copyright"))) = _s 88#endif 89 90#define __KERNEL_RCSID(_n, _s) __RCSID(_s) 91#define __KERNEL_SCCSID(_n, _s) 92#if 0 /* XXX see above */ 93#define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s) 94#else 95#define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s) 96#endif 97 98#ifndef __lint__ 99#define __link_set_make_entry(set, sym) \ 100 static void const * const __link_set_##set##_sym_##sym \ 101 __section("link_set_" #set) __used = &sym 102#define __link_set_make_entry2(set, sym, n) \ 103 static void const * const __link_set_##set##_sym_##sym##_##n \ 104 __section("link_set_" #set) __used = &sym[n] 105#else 106#define __link_set_make_entry(set, sym) \ 107 extern void const * const __link_set_##set##_sym_##sym 108#define __link_set_make_entry2(set, sym, n) \ 109 extern void const * const __link_set_##set##_sym_##sym##_##n 110#endif /* __lint__ */ 111 112#define __link_set_add_text(set, sym) __link_set_make_entry(set, sym) 113#define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym) 114#define __link_set_add_data(set, sym) __link_set_make_entry(set, sym) 115#define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym) 116#define __link_set_add_text2(set, sym, n) __link_set_make_entry2(set, sym, n) 117#define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n) 118#define __link_set_add_data2(set, sym, n) __link_set_make_entry2(set, sym, n) 119#define __link_set_add_bss2(set, sym, n) __link_set_make_entry2(set, sym, n) 120 121#define __link_set_decl(set, ptype) \ 122 extern ptype * const __start_link_set_##set[]; \ 123 extern ptype * const __stop_link_set_##set[] \ 124 125#define __link_set_start(set) (__start_link_set_##set) 126#define __link_set_end(set) (__stop_link_set_##set) 127 128#define __link_set_count(set) \ 129 (__link_set_end(set) - __link_set_start(set)) 130 131#endif /* !_SYS_CDEFS_ELF_H_ */ 132