Patrick Welche <prlw1@cam.ac.uk>
[netbsd-mini2440.git] / lib / csu / i386 / crt0.c
blob29d81642cc84e9f6aea5aa44939d2e10cf55c94c
1 /* $NetBSD: crt0.c,v 1.34 2008/04/28 20:22:54 martin Exp $ */
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum and Paul Kranenburg.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include <stdlib.h>
34 #include "common.h"
36 extern void start __P((void)) __asm("start");
37 void __start __P((int, char *[], char *[]));
39 __asm("
40 .text
41 .align 2
42 .globl start
43 start:
44 movl %ebx,___ps_strings
45 movl (%esp),%eax
46 leal 8(%esp,%eax,4),%ecx
47 leal 4(%esp),%edx
48 pushl %ecx
49 pushl %edx
50 pushl %eax
51 call ___start
52 ");
54 #if defined(LIBC_SCCS) && !defined(lint)
55 __RCSID("$NetBSD: crt0.c,v 1.34 2008/04/28 20:22:54 martin Exp $");
56 #endif /* LIBC_SCCS and not lint */
58 void
59 __start(argc, argv, envp)
60 int argc;
61 char *argv[];
62 char *envp[];
64 char *ap;
66 environ = envp;
68 if ((ap = argv[0]))
69 if ((__progname = _strrchr(ap, '/')) == NULL)
70 __progname = ap;
71 else
72 ++__progname;
74 #ifdef DYNAMIC
75 /* ld(1) convention: if DYNAMIC = 0 then statically linked */
76 if (&_DYNAMIC)
77 __load_rtld(&_DYNAMIC);
78 #endif /* DYNAMIC */
80 #ifdef MCRT0
81 atexit(_mcleanup);
82 monstartup((u_long)&eprol, (u_long)&etext);
83 #endif /* MCRT0 */
85 __asm("__callmain:"); /* Defined for the benefit of debuggers */
86 exit(main(argc, argv, envp));
89 #ifdef DYNAMIC
90 __asm("
91 .text
92 .align 2
93 ___syscall:
94 popl %ecx
95 popl %eax
96 pushl %ecx
97 int $0x80
98 jc 1f
99 jmp %ecx
101 movl $-1,%eax
102 jmp %ecx
104 #endif /* DYNAMIC */
106 #include "common.c"
108 #ifdef MCRT0
109 __asm("
110 .text
111 .align 2
112 eprol:
114 #endif /* MCRT0 */