source: trunk/libs/newlib/src/libgloss/d30v/crt0.S @ 616

Last change on this file since 616 was 444, checked in by satin@…, 6 years ago

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

File size: 1.4 KB
Line 
1/*
2 * crt0.S -- startup file for D30V systems.
3 *
4 * Copyright (c) 1997 Cygnus Support
5 *
6 * The authors hereby grant permission to use, copy, modify, distribute,
7 * and license this software and its documentation for any purpose, provided
8 * that existing copyright notices are retained in all copies and that this
9 * notice is included verbatim in any distributions. No written agreement,
10 * license, or royalty fee is required for any of the authorized uses.
11 * Modifications to this software may be copyrighted by their authors
12 * and need not follow the licensing terms described here, provided that
13 * the new terms are clearly indicated on the first page of each file where
14 * they apply.
15 */
16
17        .file   "crt0.S"
18        .text
19        .globl  _start
20        .extern main
21        .extern exit
22        .extern __stack
23        .extern __sbss_start
24        .extern __sbss_end
25        .extern __ebss_start
26        .extern __ebss_end
27        .extern __bss_start
28        .extern __bss_end
29        .extern memset
30        .type   _start,@function
31
32_start: or.l    sp,r0,__stack
33
34        /* Zero the .sbss area */
35        or.l    r2,r0,__sbss_start
36        or.l    r4,r0,__sbss_end
37        sub     r4,r4,r2        || or.s r3,r0,0
38        bsrtnz.l r4,(memset)
39
40        /* Zero the .ebss area */
41        or.l    r2,r0,__ebss_start
42        or.l    r4,r0,__ebss_end
43        sub     r4,r4,r2        || or.s r3,r0,0
44        bsrtnz.l r4,(memset)
45
46        /* Zero the .bss area */
47        or.l    r2,r0,__bss_start
48        or.l    r4,r0,__bss_end
49        sub     r4,r4,r2        || or.s r3,r0,0
50        bsrtnz.l r4,(memset)
51
52        or.s    r2,r0,0         || or.s r3,r0,0
53        or      r4,r0,0         || nop
54        jsr.l   (main)
55        jsr.l   (exit)
56        .size   _start,.-_start
Note: See TracBrowser for help on using the repository browser.