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1 # Copyright (C) 2001, 2004, 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 makes sure that the .fini and .init sections do in
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30 # fact return. Users may put any desired instructions in those sections.
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31 # This file is the last thing linked into any executable.
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32
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33 # Note - this macro is complemented by the FUNC_START macro
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34 # in crti.asm. If you change this macro you must also change
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35 # that macro match.
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36 #
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37 # Note - we do not try any fancy optimizations of the return
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38 # sequences here, it is just not worth it. Instead keep things
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39 # simple. Restore all the save resgisters, including the link
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40 # register and then perform the correct function return instruction.
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41 # We also save/restore r3 to ensure stack alignment.
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42 .macro FUNC_END
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43 #ifdef __thumb__
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44 .thumb
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45
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46 pop {r3, r4, r5, r6, r7}
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47 pop {r3}
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48 mov lr, r3
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49 #else
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50 .arm
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51
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52 sub sp, fp, #40
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53 ldmfd sp, {r4, r5, r6, r7, r8, r9, sl, fp, sp, lr}
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54 #endif
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55
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56 #if defined __THUMB_INTERWORK__ || defined __thumb__
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57 bx lr
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58 #else
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59 mov pc, lr
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60 #endif
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61 .endm
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62
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63
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64 .section ".init"
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65 ;;
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66 FUNC_END
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67
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68 .section ".fini"
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69 ;;
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70 FUNC_END
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71
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72 # end of crtn.asm
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