gcc/config/sh/crti.asm

   1 /* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   2    This file was adapted from glibc sources.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 2, or (at your option) any
   9 later version.
  10
  11 In addition to the permissions in the GNU General Public License, the
  12 Free Software Foundation gives you unlimited permission to link the
  13 compiled version of this file into combinations with other programs,
  14 and to distribute those combinations without any restriction coming
  15 from the use of this file.  (The General Public License restrictions
  16 do apply in other respects; for example, they cover modification of
  17 the file, and distribution when not linked into a combine
  18 executable.)
  19
  20 GNU CC is distributed in the hope that it will be useful,
  21 but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23 General Public License for more details.
  24
  25 You should have received a copy of the GNU General Public License
  26 along with this program; see the file COPYING.  If not, write to
  27 the Free Software Foundation, 59 Temple Place - Suite 330,
  28 Boston, MA 02111-1307, USA.  */
  29
  30 /* The code in sections .init and .fini is supposed to be a single
  31    regular function.  The function in .init is called directly from
  32    start in crt1.asm.  The function in .fini is atexit()ed in crt1.asm
  33    too.
  34
  35    crti.asm contributes the prologue of a function to these sections,
  36    and crtn.asm comes up the epilogue.  STARTFILE_SPEC should list
  37    crti.o before any other object files that might add code to .init
  38    or .fini sections, and ENDFILE_SPEC should list crtn.o after any
  39    such object files.  */
  40
  41         .section .init
  42 /* The alignment below can't be smaller, otherwise the mova below
  43    breaks.  Yes, we might align just the label, but then we'd be
  44    exchanging an alignment here for one there, since the code fragment
  45    below ensures 4-byte alignment on __ELF__.  */
  46 #ifdef __ELF__
  47         .p2align 2
  48 #else
  49         .p2align 1
  50 #endif
  51         .global  _init
  52 _init:
  53 #ifdef __ELF__
  54         mov.l   r12,@-r15
  55         mova    0f,r0
  56         mov.l   0f,r12
  57 #endif
  58         mov.l   r14,@-r15
  59 #ifdef __ELF__
  60         add     r0,r12
  61 #endif
  62         sts.l   pr,@-r15
  63 #ifdef __ELF__
  64         bra     1f
  65 #endif
  66         mov     r15,r14
  67 #ifdef __ELF__
  68 0:      .long   _GLOBAL_OFFSET_TABLE_
  69 1:
  70 #endif
  71
  72         .section .fini
  73 /* The alignment below can't be smaller, otherwise the mova below
  74    breaks.  Yes, we might align just the label, but then we'd be
  75    exchanging an alignment here for one there, since the code fragment
  76    below ensures 4-byte alignment on __ELF__.  */
  77 #ifdef __ELF__
  78         .p2align 2
  79 #else
  80         .p2align 1
  81 #endif
  82         .global  _fini
  83 _fini:
  84 #ifdef __ELF__
  85         mov.l   r12,@-r15
  86         mova    0f,r0
  87         mov.l   0f,r12
  88 #endif
  89         mov.l   r14,@-r15
  90 #ifdef __ELF__
  91         add     r0,r12
  92 #endif
  93         sts.l   pr,@-r15
  94 #ifdef __ELF__
  95         bra     1f
  96 #endif
  97         mov     r15,r14
  98 #ifdef __ELF__
  99 0:      .long   _GLOBAL_OFFSET_TABLE_
 100 1:
 101 #endif