cdefs_elf.h

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    1 /*      $NetBSD: cdefs_elf.h,v 1.27 2006/05/18 17:55:38 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 
   63 /* Do not use __weak_extern, use __weak_reference instead */
   64 #define __weak_extern(sym)                                              \
   65     __asm(".weak " _C_LABEL_STRING(#sym));
   66 
   67 #if __GNUC_PREREQ__(4, 0)
   68 #define __weak_reference(sym)   __attribute__((__weakref__))
   69 #else
   70 #define __weak_reference(sym)   ; __asm(".weak " _C_LABEL_STRING(#sym))
   71 #endif
   72 
   73 #define __warn_references(sym,msg)                                      \
   74     __asm(".section .gnu.warning." #sym "\n\t.ascii \"" msg "\"\n\t.text");
   75 
   76 #else /* !__STDC__ */
   77 
   78 #ifdef __LEADING_UNDERSCORE
   79 #define __weak_alias(alias,sym) ___weak_alias(_/**/alias,_/**/sym)
   80 #define ___weak_alias(alias,sym)                                        \
   81     __asm(".weak alias\nalias = sym");
   82 #else
   83 #define __weak_alias(alias,sym)                                         \
   84     __asm(".weak alias\nalias = sym");
   85 #endif
   86 #ifdef __LEADING_UNDERSCORE
   87 #define __weak_extern(sym) ___weak_extern(_/**/sym)
   88 #define ___weak_extern(sym)                                             \
   89     __asm(".weak sym");
   90 #else
   91 #define __weak_extern(sym)                                              \
   92     __asm(".weak sym");
   93 #endif
   94 #define __warn_references(sym,msg)                                      \
   95     __asm(".section .gnu.warning.sym\n\t.ascii msg ; .text");
   96 
   97 #endif /* !__STDC__ */
   98 
   99 #if __STDC__
  100 #define __SECTIONSTRING(_sec, _str)                                     \
  101         __asm(".section " #_sec "\n\t.asciz \"" _str "\"\n\t.previous")
  102 #else
  103 #define __SECTIONSTRING(_sec, _str)                                     \
  104         __asm(".section _sec\n\t.asciz _str\n\t.previous")
  105 #endif
  106 
  107 #define __IDSTRING(_n,_s)               __SECTIONSTRING(.ident,_s)
  108 
  109 #define __RCSID(_s)                     __IDSTRING(rcsid,_s)
  110 #define __SCCSID(_s)
  111 #define __SCCSID2(_s)
  112 #if 0   /* XXX userland __COPYRIGHTs have \ns in them */
  113 #define __COPYRIGHT(_s)                 __SECTIONSTRING(.copyright,_s)
  114 #else
  115 #define __COPYRIGHT(_s)                                                 \
  116         static const char copyright[]                                   \
  117             __attribute__((__unused__,__section__(".copyright"))) = _s
  118 #endif
  119 
  120 #define __KERNEL_RCSID(_n, _s)          __RCSID(_s)
  121 #define __KERNEL_SCCSID(_n, _s)
  122 #if 0   /* XXX see above */
  123 #define __KERNEL_COPYRIGHT(_n, _s)      __COPYRIGHT(_s)
  124 #else
  125 #define __KERNEL_COPYRIGHT(_n, _s)      __SECTIONSTRING(.copyright, _s)
  126 #endif
  127 
  128 #ifndef __lint__
  129 #define __link_set_make_entry(set, sym)                                 \
  130         static void const * const __link_set_##set##_sym_##sym          \
  131             __section("link_set_" #set) __used = &sym
  132 #define __link_set_make_entry2(set, sym, n)                             \
  133         static void const * const __link_set_##set##_sym_##sym##_##n    \
  134             __section("link_set_" #set) __used = &sym[n]
  135 #else
  136 #define __link_set_make_entry(set, sym)                                 \
  137         extern void const * const __link_set_##set##_sym_##sym
  138 #define __link_set_make_entry2(set, sym, n)                             \
  139         extern void const * const __link_set_##set##_sym_##sym##_##n
  140 #endif /* __lint__ */
  141 
  142 #define __link_set_add_text(set, sym)   __link_set_make_entry(set, sym)
  143 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
  144 #define __link_set_add_data(set, sym)   __link_set_make_entry(set, sym)
  145 #define __link_set_add_bss(set, sym)    __link_set_make_entry(set, sym)
  146 #define __link_set_add_text2(set, sym, n)   __link_set_make_entry2(set, sym, n)
  147 #define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n)
  148 #define __link_set_add_data2(set, sym, n)   __link_set_make_entry2(set, sym, n)
  149 #define __link_set_add_bss2(set, sym, n)    __link_set_make_entry2(set, sym, n)
  150 
  151 #define __link_set_decl(set, ptype)                                     \
  152         extern ptype * const __start_link_set_##set[];                  \
  153         extern ptype * const __stop_link_set_##set[]                    \
  154 
  155 #define __link_set_start(set)   (__start_link_set_##set)
  156 #define __link_set_end(set)     (__stop_link_set_##set)
  157 
  158 #define __link_set_count(set)                                           \
  159         (__link_set_end(set) - __link_set_start(set))
  160 
  161 #endif /* !_SYS_CDEFS_ELF_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/sys/cdefs_elf.h

FreeBSD/Linux Kernel Cross Reference
sys/sys/cdefs_elf.h