gcc/config/alpha/crtend.asm

   1 /*
   2  * Copyright (C) 1996, 2000 Free Software Foundation, Inc.
   3  *  Contributed by Richard Henderson (rth@tamu.edu)
   4  *
   5  * This file is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2, or (at your option) any
   8  * later version.
   9  *
  10  * In addition to the permissions in the GNU General Public License, the
  11  * Free Software Foundation gives you unlimited permission to link the
  12  * compiled version of this file with other programs, and to distribute
  13  * those programs without any restriction coming from the use of this
  14  * file.  (The General Public License restrictions do apply in other
  15  * respects; for example, they cover modification of the file, and
  16  * distribution when not linked into another program.)
  17  *
  18  * This file is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; see the file COPYING.  If not, write to
  25  * the Free Software Foundation, 59 Temple Place - Suite 330,
  26  * Boston, MA 02111-1307, USA.
  27  *
  28  *    As a special exception, if you link this library with files
  29  *    compiled with GCC to produce an executable, this does not cause
  30  *    the resulting executable to be covered by the GNU General Public License.
  31  *    This exception does not however invalidate any other reasons why
  32  *    the executable file might be covered by the GNU General Public License.
  33  */
  34
  35 /*
  36  * Tails of the constructor/destructor lists.
  37  */
  38
  39 /* The __*TOR_END__ symbols are not global because when this file is used
  40    in a shared library, we do not want the symbol to fall over to the
  41    application's lists.  */
  42
  43 .section .ctors,"aw"
  44         .align 3
  45 __CTOR_END__:
  46         .quad   0
  47
  48 .section .dtors,"aw"
  49         .align 3
  50 __DTOR_END__:
  51         .quad   0
  52
  53 .section .jcr,"aw"
  54         .align 3
  55 __JCR_END__:
  56         .quad   0
  57
  58 .section .eh_frame,"aw"
  59 __FRAME_END__:
  60         .quad   0
  61
  62 /*
  63  * Fragment of the ELF _init routine that invokes our ctor startup
  64  */
  65
  66 .section .init,"ax"
  67
  68         /* Since the bits of the _init function are spread across many
  69            object files, each potentially with its own GP, we must
  70            assume we need to load ours.  Further, our .init section
  71            can easily be more than 4MB away from our .text bits so we
  72            can't use bsr.  */
  73
  74         br      $29,1f
  75 1:      ldgp    $29,0($29)
  76         jsr     $26,__do_global_ctors_aux
  77
  78         /* Must match the alignment we got from crti.o else we get
  79            zero-filled holes in our _init function and thense SIGILL.  */
  80         .align 3
  81
  82 /*
  83  * Invoke our constructors in order.
  84  */
  85
  86 .text
  87
  88         .align 3
  89         .ent __do_global_ctors_aux
  90
  91 __do_global_ctors_aux:
  92         ldgp    $29,0($27)
  93         lda     $30,-16($30)
  94         .frame  $30,16,$26,0
  95         stq     $9,8($30)
  96         stq     $26,0($30)
  97         .mask   0x4000200,-16
  98         .prologue 1
  99
 100         lda     $9,__CTOR_END__-8
 101         br      1f
 102 0:      jsr     $26,($27)
 103 1:      ldq     $27,0($9)
 104         subq    $9,8,$9
 105         not     $27,$0
 106         bne     $0,0b
 107
 108         ldq     $26,0($30)
 109         ldq     $9,8($30)
 110         lda     $30,16($30)
 111         ret
 112
 113         .end __do_global_ctors_aux