lib/csu/arm32/c++rt0.c

   1 /*      $NetBSD: c++rt0.c,v 1.3 2005/12/24 21:54:01 perry Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Paul Kranenburg.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Run-time module for GNU C++ compiled shared libraries.
  34  *
  35  * The linker constructs the following arrays of pointers to global
  36  * constructors and destructors. The first element contains the
  37  * number of pointers in each.
  38  * The tables are also null-terminated.
  39  */
  40 #include <stdlib.h>
  41
  42
  43 /*
  44  * We make the __{C,D}TOR_LIST__ symbols appear as type `SETD' and
  45  * include a dummy local function in the set. This keeps references
  46  * to these symbols local to the shared object this module is linked to.
  47  */
  48 static void dummy __P((void)) { return; }
  49
  50 /* Note: this is "a.out" dependent. */
  51 __asm(".stabs \"___CTOR_LIST__\",22,0,0,_dummy");
  52 __asm(".stabs \"___DTOR_LIST__\",22,0,0,_dummy");
  53
  54 #ifdef __arm32__                        /* XXX ARM32_BROKEN_RELOCATIONS */
  55 #define ARM32_BROKEN_RELOCATIONS        /* XXX ARM32_BROKEN_RELOCATIONS */
  56 #endif                                  /* XXX ARM32_BROKEN_RELOCATIONS */
  57
  58 void (*__CTOR_LIST__[0]) __P((void));
  59 void (*__DTOR_LIST__[0]) __P((void));
  60
  61 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
  62 static void     __dtors __P((long));    /* XXX ARM32_BROKEN_RELOCATIONS */
  63 static void     __ctors __P((long));    /* XXX ARM32_BROKEN_RELOCATIONS */
  64 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
  65 static void     __dtors __P((void));
  66 static void     __ctors __P((void));
  67 #endif
  68
  69 static void
  70 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
  71 __dtors(base)                           /* XXX ARM32_BROKEN_RELOCATIONS */
  72         long base;                      /* XXX ARM32_BROKEN_RELOCATIONS */
  73 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
  74 __dtors()
  75 #endif
  76 {
  77         unsigned long i = (unsigned long) __DTOR_LIST__[0];
  78         void (**p)(void) = __DTOR_LIST__ + i;
  79
  80         while (i--)
  81 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
  82                 (*(void (*)(void))((char *)(*p--) + base))(); /* XXX ... */
  83 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
  84                 (**p--)();
  85 #endif
  86 }
  87
  88 static void
  89 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
  90 __ctors(base)                           /* XXX ARM32_BROKEN_RELOCATIONS */
  91         long base;                      /* XXX ARM32_BROKEN_RELOCATIONS */
  92 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
  93 __ctors()
  94 #endif
  95 {
  96         unsigned long i = (unsigned long) __CTOR_LIST__[0];
  97         void (**p)(void) = __CTOR_LIST__ + 1;
  98
  99         while (i--)
 100 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
 101                 (*(void (*)(void))((char *)(*p++) + base))(); /* XXX ... */
 102 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
 103                 (**p++)();
 104 #endif
 105 }
 106
 107 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
 108 extern void __init __P((long)) __asm(".init"); /* XXX ARM32_BROKEN_RELOCATIONS */
 109 extern void __fini __P((long)) __asm(".fini"); /* XXX ARM32_BROKEN_RELOCATIONS */
 110 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
 111 extern void __init __P((void)) __asm(".init");
 112 extern void __fini __P((void)) __asm(".fini");
 113 #endif
 114
 115 void
 116 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
 117 __init(base)                            /* XXX ARM32_BROKEN_RELOCATIONS */
 118         long base;                      /* XXX ARM32_BROKEN_RELOCATIONS */
 119 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
 120 __init()
 121 #endif
 122 {
 123         static int initialized = 0;
 124
 125         /*
 126          * Call global constructors.
 127          * Arrange to call global destructors at exit.
 128          */
 129         if (!initialized) {
 130                 initialized = 1;
 131 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
 132                 __ctors(base);          /* XXX ARM32_BROKEN_RELOCATIONS */
 133 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
 134                 __ctors();
 135 #endif                                  /* XXX ARM32_BROKEN_RELOCATIONS */
 136         }
 137
 138 }
 139
 140 void
 141 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
 142 __fini(base)                            /* XXX ARM32_BROKEN_RELOCATIONS */
 143         long base;                      /* XXX ARM32_BROKEN_RELOCATIONS */
 144 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
 145 __fini()
 146 #endif                                  /* XXX ARM32_BROKEN_RELOCATIONS */
 147 {
 148         /*
 149          * Call global destructors.
 150          */
 151 #ifdef ARM32_BROKEN_RELOCATIONS         /* XXX ARM32_BROKEN_RELOCATIONS */
 152         __dtors(base);                  /* XXX ARM32_BROKEN_RELOCATIONS */
 153 #else                                   /* XXX ARM32_BROKEN_RELOCATIONS */
 154         __dtors();
 155 #endif                                  /* XXX ARM32_BROKEN_RELOCATIONS */
 156 }