source: trunk/libs/newlib/src/libgloss/spu/crtn.S @ 546

Last change on this file since 546 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 2.5 KB
Line 
1# (C) Copyright IBM Corp. 2005, 2006
2#
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are met:
7#
8#     * Redistributions of source code must retain the above copyright notice,
9# this list of conditions and the following disclaimer.
10#     * Redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution.
13#     * Neither the name of IBM nor the names of its contributors may be
14# used to endorse or promote products derived from this software without
15# specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27# POSSIBILITY OF SUCH DAMAGE.
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 complimented by the FUNC_START macro
34        # in crti.S.  If you change this macro you must also change
35        # that macro match.
36        #
37        # Note - we do not try any fancy optimisations of the return
38        # sequences here, it is just not worth it.  Instead keep things
39        # simple.  The link register is restored and then the correct
40        # function return instruction is performed.
41.macro FUNC_END
42        ai      $sp, $sp, 32
43        lqd     $lr, 16($sp)
44        bi      $lr
45.endm
46        .file           "crtn.S"
47
48        .section        ".init"
49
50        FUNC_END
51       
52        .section        ".fini"
53       
54        FUNC_END
55       
56        # To ensure nothing is linked at address 0, provide a dummy
57        # .interrupt section.  This is in crtn.S to make sure any
58        # user-provided real .interrupt section will get linked
59        # in front of this dummy.
60        .section        ".interrupt","ax"
61        .align 2
62        heq $0,$0
63
64# end of crtn.S
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