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comparison gcc/config/arm/crtn.asm @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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1 # Copyright (C) 2001, 2004, 2008, 2009 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 3, or (at your option) any
7 # later version.
8 #
9 # This file is distributed in the hope that it will be useful, but
10 # WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # General Public License for more details.
13 #
14 # Under Section 7 of GPL version 3, you are granted additional
15 # permissions described in the GCC Runtime Library Exception, version
16 # 3.1, as published by the Free Software Foundation.
17 #
18 # You should have received a copy of the GNU General Public License and
19 # a copy of the GCC Runtime Library Exception along with this program;
20 # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
21 # <http://www.gnu.org/licenses/>.
22
23 /* An executable stack is *not* required for these functions. */
24 #if defined(__ELF__) && defined(__linux__)
25 .section .note.GNU-stack,"",%progbits
26 .previous
27 #endif
28
29 # This file just makes sure that the .fini and .init sections do in
30 # fact return. Users may put any desired instructions in those sections.
31 # This file is the last thing linked into any executable.
32
33 # Note - this macro is complemented by the FUNC_START macro
34 # in crti.asm. If you change this macro you must also change
35 # that macro match.
36 #
37 # Note - we do not try any fancy optimizations of the return
38 # sequences here, it is just not worth it. Instead keep things
39 # simple. Restore all the save resgisters, including the link
40 # register and then perform the correct function return instruction.
41 # We also save/restore r3 to ensure stack alignment.
42 .macro FUNC_END
43 #ifdef __thumb__
44 .thumb
45
46 pop {r3, r4, r5, r6, r7}
47 pop {r3}
48 mov lr, r3
49 #else
50 .arm
51
52 sub sp, fp, #40
53 ldmfd sp, {r4, r5, r6, r7, r8, r9, sl, fp, sp, lr}
54 #endif
55
56 #if defined __THUMB_INTERWORK__ || defined __thumb__
57 bx lr
58 #else
59 mov pc, lr
60 #endif
61 .endm
62
63
64 .section ".init"
65 ;;
66 FUNC_END
67
68 .section ".fini"
69 ;;
70 FUNC_END
71
72 # end of crtn.asm