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1 # Copyright (C) 2001, 2008, 2009 Free Software Foundation, Inc.
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2 # Written By Nick Clifton
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3 #
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4 # This file is free software; you can redistribute it and/or modify it
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5 # under the terms of the GNU General Public License as published by the
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6 # Free Software Foundation; either version 3, or (at your option) any
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7 # later version.
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8 #
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9 # This file is distributed in the hope that it will be useful, but
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10 # WITHOUT ANY WARRANTY; without even the implied warranty of
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 # General Public License for more details.
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13 #
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14 # Under Section 7 of GPL version 3, you are granted additional
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15 # permissions described in the GCC Runtime Library Exception, version
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16 # 3.1, as published by the Free Software Foundation.
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17 #
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18 # You should have received a copy of the GNU General Public License and
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19 # a copy of the GCC Runtime Library Exception along with this program;
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20 # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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21 # <http://www.gnu.org/licenses/>.
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22
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23 /* An executable stack is *not* required for these functions. */
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24 #if defined(__ELF__) && defined(__linux__)
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25 .section .note.GNU-stack,"",%progbits
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26 .previous
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27 #endif
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28
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29 # This file just make a stack frame for the contents of the .fini and
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30 # .init sections. Users may put any desired instructions in those
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31 # sections.
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32
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33 #ifdef __ELF__
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34 #define TYPE(x) .type x,function
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35 #else
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36 #define TYPE(x)
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37 #endif
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38
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39 # Note - this macro is complemented by the FUNC_END macro
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40 # in crtn.asm. If you change this macro you must also change
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41 # that macro match.
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42 .macro FUNC_START
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43 #ifdef __thumb__
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44 .thumb
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45
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46 push {r3, r4, r5, r6, r7, lr}
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47 #else
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48 .arm
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49 # Create a stack frame and save any call-preserved registers
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50 mov ip, sp
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51 stmdb sp!, {r3, r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
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52 sub fp, ip, #4
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53 #endif
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54 .endm
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55
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56 .section ".init"
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57 .align 2
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58 .global _init
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59 #ifdef __thumb__
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60 .thumb_func
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61 #endif
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62 TYPE(_init)
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63 _init:
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64 FUNC_START
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65
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66
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67 .section ".fini"
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68 .align 2
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69 .global _fini
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70 #ifdef __thumb__
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71 .thumb_func
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72 #endif
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73 TYPE(_fini)
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74 _fini:
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75 FUNC_START
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76
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77 # end of crti.asm
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