old-autovect-branch/gcc/config/mmix/crtn.asm

   1 /* Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   2    Contributed by Hans-Peter Nilsson <hp@bitrange.com>
   3
   4 This file is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU General Public License as published by the
   6 Free Software Foundation; either version 2, or (at your option) any
   7 later version.
   8
   9 In addition to the permissions in the GNU General Public License, the
  10 Free Software Foundation gives you unlimited permission to link the
  11 compiled version of this file into combinations with other programs,
  12 and to distribute those combinations without any restriction coming
  13 from the use of this file.  (The General Public License restrictions
  14 do apply in other respects; for example, they cover modification of
  15 the file, and distribution when not linked into a combine
  16 executable.)
  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, 51 Franklin Street, Fifth Floor,
  26 Boston, MA 02110-1301, USA.  */
  27
  28 % This must be the last file on the link-line, allocating global registers
  29 % from the top.
  30
  31 % Register $254 is the stack-pointer.
  32 sp GREG
  33
  34 % Register $253 is frame-pointer.  It's not supposed to be used in most
  35 % functions.
  36 fp GREG
  37
  38 % $252 is the static chain register; nested functions receive the
  39 % context of the surrounding function through a pointer passed in this
  40 % register.
  41 static_chain GREG
  42 struct_value_reg GREG
  43
  44 % These registers are used to pass state at an exceptional return (C++).
  45 eh_state_3 GREG
  46 eh_state_2 GREG
  47 eh_state_1 GREG
  48 eh_state_0 GREG
  49
  50 #ifdef __MMIX_ABI_GNU__
  51
  52 % Allocate global registers used by the GNU ABI.
  53 gnu_parm_reg_16 GREG
  54 gnu_parm_reg_15 GREG
  55 gnu_parm_reg_14 GREG
  56 gnu_parm_reg_13 GREG
  57 gnu_parm_reg_12 GREG
  58 gnu_parm_reg_11 GREG
  59 gnu_parm_reg_10 GREG
  60 gnu_parm_reg_9 GREG
  61 gnu_parm_reg_8 GREG
  62 gnu_parm_reg_7 GREG
  63 gnu_parm_reg_6 GREG
  64 gnu_parm_reg_5 GREG
  65 gnu_parm_reg_4 GREG
  66 gnu_parm_reg_3 GREG
  67 gnu_parm_reg_2 GREG
  68 gnu_parm_reg_1 GREG
  69
  70 #endif /* __MMIX_ABI_GNU__ */
  71
  72 % Provide last part of _init and _fini.
  73
  74 % The return address is stored in the topmost stored register in the
  75 % register-stack.  We ignore the current value in rJ.  It is probably
  76 % garbage because each fragment of _init and _fini may have their own idea
  77 % of the current stack frame, if they're cut out from a "real" function
  78 % like in gcc/crtstuff.c.
  79
  80         .section .init,"ax",@progbits
  81         GETA    $255,0F
  82         PUT     rJ,$255
  83         POP     0,0
  84 0H      PUT     rJ,$0
  85         POP     0,0
  86
  87         .section .fini,"ax",@progbits
  88         GETA    $255,0F
  89         PUT     rJ,$255
  90         POP     0,0
  91 0H      PUT     rJ,$0
  92         POP     0,0