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 #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 /* GCC visibility helper macro */ 99 #define __LIBC_HIDDEN__ \ 100 __attribute__ ((visibility ("hidden"))) 101 102 #define __IDSTRING(_n,_s) __SECTIONSTRING(.ident,_s) 103 104 #define __RCSID(_s) __IDSTRING(rcsid,_s) 105 #define __SCCSID(_s) 106 #define __SCCSID2(_s) 107 #if 0 /* XXX userland __COPYRIGHTs have \ns in them */ 108 #define __COPYRIGHT(_s) __SECTIONSTRING(.copyright,_s) 109 #else 110 #define __COPYRIGHT(_s) \ 111 static const char copyright[] \ 112 __attribute__((__unused__,__section__(".copyright"))) = _s 113 #endif 114 115 #define __KERNEL_RCSID(_n, _s) __RCSID(_s) 116 #define __KERNEL_SCCSID(_n, _s) 117 #if 0 /* XXX see above */ 118 #define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s) 119 #else 120 #define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s) 121 #endif 122 123 #ifndef __lint__ 124 #define __link_set_make_entry(set, sym) \ 125 static void const * const __link_set_##set##_sym_##sym \ 126 __section("link_set_" #set) __used = &sym 127 #define __link_set_make_entry2(set, sym, n) \ 128 static void const * const __link_set_##set##_sym_##sym##_##n \ 129 __section("link_set_" #set) __used = &sym[n] 130 #else 131 #define __link_set_make_entry(set, sym) \ 132 extern void const * const __link_set_##set##_sym_##sym 133 #define __link_set_make_entry2(set, sym, n) \ 134 extern void const * const __link_set_##set##_sym_##sym##_##n 135 #endif /* __lint__ */ 136 137 #define __link_set_add_text(set, sym) __link_set_make_entry(set, sym) 138 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym) 139 #define __link_set_add_data(set, sym) __link_set_make_entry(set, sym) 140 #define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym) 141 #define __link_set_add_text2(set, sym, n) __link_set_make_entry2(set, sym, n) 142 #define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n) 143 #define __link_set_add_data2(set, sym, n) __link_set_make_entry2(set, sym, n) 144 #define __link_set_add_bss2(set, sym, n) __link_set_make_entry2(set, sym, n) 145 146 #define __link_set_decl(set, ptype) \ 147 extern ptype * const __start_link_set_##set[]; \ 148 extern ptype * const __stop_link_set_##set[] \ 149 150 #define __link_set_start(set) (__start_link_set_##set) 151 #define __link_set_end(set) (__stop_link_set_##set) 152 153 #define __link_set_count(set) \ 154 (__link_set_end(set) - __link_set_start(set)) 155 156 #endif /* !_SYS_CDEFS_ELF_H_ */ 157