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 GCC.
   5
   6 GCC 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 GCC 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 #if __SHMEDIA__
  54         addi    r15, -16, r15
  55         st.q    r15, 8, r14
  56         st.q    r15, 0, r18
  57         add     r15, r63, r14
  58 #elif __SH5__ && ! __SHMEDIA__
  59         mov     r15,r0
  60         add     #-8,r15
  61         mov.l   r14,@-r0
  62         sts.l   pr,@-r0
  63         mov     r15,r14
  64         nop
  65 #else
  66 #ifdef __ELF__
  67         mov.l   r12,@-r15
  68         mova    0f,r0
  69         mov.l   0f,r12
  70 #endif
  71         mov.l   r14,@-r15
  72 #ifdef __ELF__
  73         add     r0,r12
  74 #endif
  75         sts.l   pr,@-r15
  76 #ifdef __ELF__
  77         bra     1f
  78 #endif
  79         mov     r15,r14
  80 #ifdef __ELF__
  81 0:      .long   _GLOBAL_OFFSET_TABLE_
  82 1:
  83 #endif
  84 #endif /* __SHMEDIA__ */
  85
  86         .section .fini
  87 /* The alignment below can't be smaller, otherwise the mova below
  88    breaks.  Yes, we might align just the label, but then we'd be
  89    exchanging an alignment here for one there, since the code fragment
  90    below ensures 4-byte alignment on __ELF__.  */
  91 #ifdef __ELF__
  92         .p2align 2
  93 #else
  94         .p2align 1
  95 #endif
  96         .global  _fini
  97 _fini:
  98 #if __SHMEDIA__
  99         addi    r15, -16, r15
 100         st.q    r15, 8, r14
 101         st.q    r15, 0, r18
 102         add     r15, r63, r14
 103 #elif __SH5__ && ! __SHMEDIA__
 104         mov     r15,r0
 105         add     #-8,r15
 106         mov.l   r14,@-r0
 107         sts.l   pr,@-r0
 108         mov     r15,r14
 109         nop
 110 #else
 111 #ifdef __ELF__
 112         mov.l   r12,@-r15
 113         mova    0f,r0
 114         mov.l   0f,r12
 115 #endif
 116         mov.l   r14,@-r15
 117 #ifdef __ELF__
 118         add     r0,r12
 119 #endif
 120         sts.l   pr,@-r15
 121 #ifdef __ELF__
 122         bra     1f
 123 #endif
 124         mov     r15,r14
 125 #ifdef __ELF__
 126 0:      .long   _GLOBAL_OFFSET_TABLE_
 127 1:
 128 #endif
 129 #endif /* __SHMEDIA__ */