source: trunk/libs/newlib/src/libgloss/microblaze/sim-crtinit.S @ 633

Last change on this file since 633 was 444, checked in by satin@…, 6 years ago

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

File size: 2.6 KB
Line 
1## Copyright (c) 2001, 2009 Xilinx, Inc.  All rights reserved.
2##
3## Redistribution and use in source and binary forms, with or without
4## modification, are permitted provided that the following conditions are
5## met:
6##
7## 1.  Redistributions source code must retain the above copyright notice,
8## this list of conditions and the following disclaimer.
9##
10## 2.  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##
14## 3.  Neither the name of Xilinx nor the names of its contributors may be
15## used to endorse or promote products derived from this software without
16## specific prior written permission.
17##
18## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
19## IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20## TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
21## PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22## HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
24## TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25## PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26## LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27## NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28## SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29#
30#
31# sim-crtinit.s
32#
33# Default second stage of C run-time initialization that does not peform
34# BSS initialization to zero. Typical use is on a simulator.     
35#   
36
37        .globl _crtinit
38        .align 2
39        .ent _crtinit
40
41_crtinit:
42        addi    r1, r1, -20                     /* Save Link register    */
43        swi     r15, r1, 0
44
45        brlid   r15, _program_init              /* Initialize the program  */
46        nop
47
48        brlid   r15, __init                     /* Invoke language initialization functions */
49        nop
50   
51        addi    r6, r0, 0                       /* Initialize argc = 1 and argv = NULL and envp = NULL  */
52        addi    r7, r0, 0                       
53        brlid   r15, main                       /* Execute the program */
54        addi    r5, r0, 0                       
55
56        addik   r19, r3, 0                      /* Save return value */
57   
58        brlid   r15, __fini                     /* Invoke language cleanup functions */
59        nop
60
61        brlid   r15, _program_clean             /* Cleanup the program  */
62        nop
63
64        lw      r15, r1, r0                     /* Return back to CRT   */
65        addik   r3, r19, 0                      /* Restore return value */
66        rtsd    r15, 8
67        addi    r1, r1, 20
68        .end _crtinit
69
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