gcc/config/arm/crti.asm

   1 #   Copyright (C) 2001 Free Software Foundation, Inc.
   2 #   Written By Nick Clifton
   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 with other programs, and to distribute
  12 # those programs without any restriction coming from the use of this
  13 # file.  (The General Public License restrictions do apply in other
  14 # respects; for example, they cover modification of the file, and
  15 # distribution when not linked into another program.)
  16 #
  17 # This file is distributed in the hope that it will be useful, but
  18 # WITHOUT ANY WARRANTY; without even the implied warranty of
  19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 # General Public License for more details.
  21 #
  22 # You should have received a copy of the GNU General Public License
  23 # along with this program; see the file COPYING.  If not, write to
  24 # the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  25 # Boston, MA 02110-1301, USA.
  26 #
  27 #    As a special exception, if you link this library with files
  28 #    compiled with GCC to produce an executable, this does not cause
  29 #    the resulting executable to be covered by the GNU General Public License.
  30 #    This exception does not however invalidate any other reasons why
  31 #    the executable file might be covered by the GNU General Public License.
  32 #
  33
  34 /* An executable stack is *not* required for these functions.  */
  35 #if defined(__ELF__) && defined(__linux__)
  36 .section .note.GNU-stack,"",%progbits
  37 .previous
  38 #endif
  39
  40 # This file just make a stack frame for the contents of the .fini and
  41 # .init sections.  Users may put any desired instructions in those
  42 # sections.
  43
  44 #ifdef __ELF__
  45 #define TYPE(x) .type x,function
  46 #else
  47 #define TYPE(x)
  48 #endif
  49
  50         # Note - this macro is complemented by the FUNC_END macro
  51         # in crtn.asm.  If you change this macro you must also change
  52         # that macro match.
  53 .macro FUNC_START
  54 #ifdef __thumb__
  55         .thumb
  56
  57         push    {r3, r4, r5, r6, r7, lr}
  58 #else
  59         .arm
  60         #  Create a stack frame and save any call-preserved registers
  61         mov     ip, sp
  62         stmdb   sp!, {r3, r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
  63         sub     fp, ip, #4
  64 #endif
  65 .endm
  66
  67         .file           "crti.asm"
  68
  69         .section        ".init"
  70         .align 2
  71         .global _init
  72 #ifdef __thumb__
  73         .thumb_func
  74 #endif
  75         TYPE(_init)
  76 _init:
  77         FUNC_START
  78
  79
  80         .section        ".fini"
  81         .align  2
  82         .global _fini
  83 #ifdef __thumb__
  84         .thumb_func
  85 #endif
  86         TYPE(_fini)
  87 _fini:
  88         FUNC_START
  89
  90 # end of crti.asm