StdLib/Include/sys/cdefs_aout.h

   1 /*  $NetBSD: cdefs_aout.h,v 1.20 2006/05/18 17:55:38 christos Exp $ */
   2
   3 /*
   4  * Written by J.T. Conklin <jtc@wimsey.com> 01/17/95.
   5  * Public domain.
   6  */
   7
   8 #ifndef _SYS_CDEFS_AOUT_H_
   9 #define _SYS_CDEFS_AOUT_H_
  10
  11 #define _C_LABEL(x)   __CONCAT(_,x)
  12 #define _C_LABEL_STRING(x)  "_"x
  13
  14 #if __STDC__
  15 #define ___RENAME(x)  __asm(___STRING(_C_LABEL(x)))
  16 #else
  17 #define ___RENAME(x)  ____RENAME(_/**/x)
  18 #define ____RENAME(x) __asm(___STRING(x))
  19 #endif
  20
  21 #define __indr_reference(sym,alias) /* nada, since we do weak refs */
  22
  23 #ifdef __GNUC__
  24 #if __STDC__
  25     #ifndef   DONT_USE_STRONG_WEAK_ALIAS
  26 #define __strong_alias(alias,sym)               \
  27     __asm(".global " _C_LABEL_STRING(#alias) "\n"     \
  28       _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
  29 #define __weak_alias(alias,sym)           \
  30     __asm(".weak " _C_LABEL_STRING(#alias) "\n"     \
  31       _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
  32
  33 /* Do not use __weak_extern, use __weak_reference instead */
  34 #define __weak_extern(sym)            \
  35     __asm(".weak " _C_LABEL_STRING(#sym));
  36
  37 #if __GNUC_PREREQ__(4, 0)
  38 #define __weak_reference(sym) __attribute__((__weakref__))
  39 #else
  40 #define __weak_reference(sym) ; __asm(".weak " _C_LABEL_STRING(#sym))
  41 #endif
  42
  43 #define __warn_references(sym,msg)          \
  44   __asm(".stabs \"" msg "\",30,0,0,0");       \
  45   __asm(".stabs \"_" #sym "\",1,0,0,0");
  46     #else
  47       #define __strong_alias(alias,sym)   /* NOTHING */
  48       #define __weak_alias(alias,sym)     /* NOTHING */
  49       #define __weak_extern(sym)          /* NOTHING */
  50       #define __weak_reference(sym)       /* NOTHING */
  51
  52       #define __warn_references(sym,msg)          \
  53               __asm(".stabs \"" msg "\",30,0,0,0");       \
  54               __asm(".stabs \"_" #sym "\",1,0,0,0");
  55     #endif
  56 #else /* __STDC__ */
  57 #define __weak_alias(alias,sym) ___weak_alias(_/**/alias,_/**/sym)
  58 #define ___weak_alias(alias,sym)          \
  59     __asm(".weak alias\nalias = sym");
  60 /* Do not use __weak_extern, use __weak_reference instead */
  61 #define __weak_extern(sym) ___weak_extern(_/**/sym)
  62 #define ___weak_extern(sym)           \
  63     __asm(".weak sym");
  64
  65 #if __GNUC_PREREQ__(4, 0)
  66 #define __weak_reference(sym) __attribute__((__weakref__))
  67 #else
  68 #define ___weak_reference(sym)  ; __asm(".weak sym");
  69 #define __weak_reference(sym) ___weak_reference(_/**/sym)
  70 #endif
  71
  72 #define __warn_references(sym,msg)          \
  73   __asm(".stabs msg,30,0,0,0");         \
  74   __asm(".stabs \"_/**/sym\",1,0,0,0");
  75 #endif /* __STDC__ */
  76 #else /* __GNUC__ */
  77 #define __warn_references(sym,msg)
  78 #endif /* __GNUC__ */
  79
  80 #if defined(__sh__)   /* XXX SH COFF */
  81 #undef __indr_reference(sym,alias)
  82 #undef __warn_references(sym,msg)
  83 #define __warn_references(sym,msg)
  84 #endif
  85
  86 #define __IDSTRING(_n,_s)           \
  87   __asm(".data ; .asciz \"" _s "\" ; .text")
  88
  89 #undef __KERNEL_RCSID
  90
  91 #define __RCSID(_s) __IDSTRING(rcsid,_s)
  92 #define __SCCSID(_s)
  93 #define __SCCSID2(_s)
  94 #if 0 /* XXX userland __COPYRIGHTs have \ns in them */
  95 #define __COPYRIGHT(_s) __IDSTRING(copyright,_s)
  96 #else
  97 #define __COPYRIGHT(_s)             \
  98   static const char copyright[] __attribute__((__unused__)) = _s
  99 #endif
 100
 101 #if defined(USE_KERNEL_RCSIDS) || !defined(_KERNEL)
 102 #define __KERNEL_RCSID(_n,_s) __IDSTRING(__CONCAT(rcsid,_n),_s)
 103 #else
 104 #define __KERNEL_RCSID(_n,_s)
 105 #endif
 106 #define __KERNEL_SCCSID(_n,_s)
 107 #define __KERNEL_COPYRIGHT(_n, _s) __IDSTRING(__CONCAT(copyright,_n),_s)
 108
 109 #ifndef __lint__
 110 #define __link_set_make_entry(set, sym, type)       \
 111   static void const * const         \
 112       __link_set_##set##_sym_##sym __used = &sym;   \
 113   __asm(".stabs \"___link_set_" #set "\", " #type ", 0, 0, _" #sym)
 114 #else
 115 #define __link_set_make_entry(set, sym, type)       \
 116   extern void const * const __link_set_##set##_sym_##sym
 117 #endif /* __lint__ */
 118
 119 #define __link_set_add_text(set, sym) __link_set_make_entry(set, sym, 23)
 120 #define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym, 23)
 121 #define __link_set_add_data(set, sym) __link_set_make_entry(set, sym, 25)
 122 #define __link_set_add_bss(set, sym)  __link_set_make_entry(set, sym, 27)
 123
 124 #define __link_set_decl(set, ptype)         \
 125 extern struct {               \
 126   int __ls_length;            \
 127   ptype *__ls_items[1];           \
 128 } __link_set_##set
 129
 130 #define __link_set_start(set) (&(__link_set_##set).__ls_items[0])
 131 #define __link_set_end(set)           \
 132   (&(__link_set_##set).__ls_items[(__link_set_##set).__ls_length])
 133
 134 #define __link_set_count(set) ((__link_set_##set).__ls_length)
 135
 136 #endif /* !_SYS_CDEFS_AOUT_H_ */