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 /* Used to tag non-static symbols that are public and exposed by the shared library. */ 68 #define __LIBC_ABI_PUBLIC__ __attribute__((visibility ("default"))) 69 70 #define __IDSTRING(_n,_s) __SECTIONSTRING(.ident,_s) 71 72 #define __RCSID(_s) __IDSTRING(rcsid,_s) 73 #define __SCCSID(_s) 74 #define __SCCSID2(_s) 75 #if 0 /* XXX userland __COPYRIGHTs have \ns in them */ 76 #define __COPYRIGHT(_s) __SECTIONSTRING(.copyright,_s) 77 #else 78 #define __COPYRIGHT(_s) \ 79 static const char copyright[] \ 80 __attribute__((__unused__,__section__(".copyright"))) = _s 81 #endif 82 83 #define __KERNEL_RCSID(_n, _s) __RCSID(_s) 84 #define __KERNEL_SCCSID(_n, _s) 85 #if 0 /* XXX see above */ 86 #define __KERNEL_COPYRIGHT(_n, _s) __COPYRIGHT(_s) 87 #else 88 #define __KERNEL_COPYRIGHT(_n, _s) __SECTIONSTRING(.copyright, _s) 89 #endif 90 91 #ifndef __lint__ 92 #define __link_set_make_entry(set, sym) \ 93 static void const * const __link_set_##set##_sym_##sym \ 94 __section("link_set_" #set) __used = &sym 95 #define __link_set_make_entry2(set, sym, n) \ 96 static void const * const __link_set_##set##_sym_##sym##_##n \ 97 __section("link_set_" #set) __used = &sym[n] 98 #else 99 #define __link_set_make_entry(set, sym) \ 100 extern void const * const __link_set_##set##_sym_##sym 101 #define __link_set_make_entry2(set, sym, n) \ 102 extern void const * const __link_set_##set##_sym_##sym##_##n 103 #endif /* __lint__ */ 104 105 #define __link_set_add_text(set, sym) __link_set_make_entry(set, sym) 106 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym) 107 #define __link_set_add_data(set, sym) __link_set_make_entry(set, sym) 108 #define __link_set_add_bss(set, sym) __link_set_make_entry(set, sym) 109 #define __link_set_add_text2(set, sym, n) __link_set_make_entry2(set, sym, n) 110 #define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n) 111 #define __link_set_add_data2(set, sym, n) __link_set_make_entry2(set, sym, n) 112 #define __link_set_add_bss2(set, sym, n) __link_set_make_entry2(set, sym, n) 113 114 #define __link_set_decl(set, ptype) \ 115 extern ptype * const __start_link_set_##set[]; \ 116 extern ptype * const __stop_link_set_##set[] \ 117 118 #define __link_set_start(set) (__start_link_set_##set) 119 #define __link_set_end(set) (__stop_link_set_##set) 120 121 #define __link_set_count(set) \ 122 (__link_set_end(set) - __link_set_start(set)) 123 124 #endif /* !_SYS_CDEFS_ELF_H_ */ 125