gcc-4.1.2/gcc/config/ia64/crtend.asm

   1 /* Copyright (C) 2000, 2001, 2003, 2005 Free Software Foundation, Inc.
   2    Contributed by Jes Sorensen, <Jes.Sorensen@cern.ch>
   3
   4    This file is part of GCC.
   5
   6    GCC is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GCC is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GCC; see the file COPYING.  If not, write to
  18    the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19    Boston, MA 02110-1301, USA.  */
  20
  21 /* As a special exception, if you link this library with other files,
  22    some of which are compiled with GCC, to produce an executable,
  23    this library does not by itself cause the resulting executable
  24    to be covered by the GNU General Public License.
  25    This exception does not however invalidate any other reasons why
  26    the executable file might be covered by the GNU General Public License.  */
  27
  28 #include "auto-host.h"
  29
  30 .section .ctors,"aw","progbits"
  31         .align  8
  32 __CTOR_END__:
  33         data8   0
  34
  35 .section .dtors,"aw","progbits"
  36         .align 8
  37 __DTOR_END__:
  38         data8   0
  39
  40 .section .jcr,"aw","progbits"
  41         .align 8
  42 __JCR_END__:
  43         data8   0
  44
  45 #ifdef HAVE_INITFINI_ARRAY
  46         .global __do_global_ctors_aux
  47         .hidden __do_global_ctors_aux
  48 #else /* !HAVE_INITFINI_ARRAY */
  49 /*
  50  * Fragment of the ELF _init routine that invokes our dtor cleanup.
  51  *
  52  * We make the call by indirection, because in large programs the
  53  * .fini and .init sections are not in range of the destination, and
  54  * we cannot allow the linker to insert a stub at the end of this
  55  * fragment of the _fini function.  Further, Itanium does not implement
  56  * the long branch instructions, and we do not wish every program to
  57  * trap to the kernel for emulation.
  58  *
  59  * Note that we require __do_global_ctors_aux to preserve the GP,
  60  * so that the next fragment in .fini gets the right value.
  61  */
  62 .section .init,"ax","progbits"
  63         { .mlx
  64           movl r2 = @pcrel(__do_global_ctors_aux - 16)
  65         }
  66         { .mii
  67           mov r3 = ip
  68           ;;
  69           add r2 = r2, r3
  70           ;;
  71         }
  72         { .mib
  73           mov b6 = r2
  74           br.call.sptk.many b0 = b6
  75           ;;
  76         }
  77 #endif /* !HAVE_INITFINI_ARRAY */
  78
  79 .text
  80         .align 32
  81         .proc __do_global_ctors_aux
  82 __do_global_ctors_aux:
  83         .prologue
  84         /*
  85                 for (loc0 = __CTOR_END__-1; *p != -1; --p)
  86                   (*p) ();
  87         */
  88         .save ar.pfs, r34
  89         alloc loc2 = ar.pfs, 0, 5, 0, 0
  90         movl loc0 = @gprel(__CTOR_END__ - 8)
  91         ;;
  92
  93         add loc0 = loc0, gp
  94         ;;
  95         ld8 loc3 = [loc0], -8
  96         .save rp, loc1
  97         mov loc1 = rp
  98         .body
  99         ;;
 100
 101         cmp.eq p6, p0 = -1, loc3
 102         mov loc4 = gp
 103 (p6)    br.cond.spnt.few .exit
 104
 105 .loop:  ld8 r15 = [loc3], 8
 106         ;;
 107         ld8 gp = [loc3]
 108         mov b6 = r15
 109
 110         ld8 loc3 = [loc0], -8
 111         nop 0
 112         br.call.sptk.many rp = b6
 113         ;;
 114
 115         cmp.ne p6, p0 = -1, loc3
 116         nop 0
 117 (p6)    br.cond.sptk.few .loop
 118
 119 .exit:  mov gp = loc3
 120         mov rp = loc1
 121         mov ar.pfs = loc2
 122
 123         br.ret.sptk.many rp
 124         .endp __do_global_ctors_aux