105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*-
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* Copyright 1996-1998 John D. Polstra.
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* All rights reserved.
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* Copyright (c) 1995 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: crt1.c,v 1.3 1999/01/07 20:18:18 steve Exp $
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*/
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#ifndef __GNUC__
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#error "GCC is needed to compile this file"
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#endif
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#include <stdlib.h>
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#include <sys/exec.h>
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#include <sys/syscall.h>
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#include <rtld.h>
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const Obj_Entry *__mainprog_obj;
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extern int __syscall (int, ...);
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#define _exit(v) __syscall(SYS_exit, (v))
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#define write(fd, s, n) __syscall(SYS_write, (fd), (s), (n))
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#define _FATAL(str) \
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do { \
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write(2, str, sizeof(str)); \
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_exit(1); \
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} while (0)
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#pragma weak _DYNAMIC
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extern int _DYNAMIC;
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extern void _init(void);
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extern void _fini(void);
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extern int main(int, char **, char **);
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char **environ;
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char *__progname = "";
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/* The entry function. */
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void
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_start(char **ap,
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void (*cleanup)(void), /* from shared loader */
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const Obj_Entry *obj, /* from shared loader */
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struct ps_strings *ps_strings)
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{
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int argc;
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char **argv;
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char **env;
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argc = * (long *) ap;
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argv = ap + 1;
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env = ap + 2 + argc;
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environ = env;
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if(argc > 0 && argv[0] != NULL) {
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char *s;
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__progname = argv[0];
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for (s = __progname; *s != '\0'; s++)
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if (*s == '/')
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__progname = s + 1;
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}
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if (&_DYNAMIC != NULL) {
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if ((obj == NULL) || (obj->magic != RTLD_MAGIC))
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_FATAL("Corrupt Obj_Entry pointer in GOT");
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if (obj->version != RTLD_VERSION)
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_FATAL("Dynamic linker version mismatch");
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__mainprog_obj = obj;
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atexit(cleanup);
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}
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atexit(_fini);
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_init();
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exit( main(argc, argv, env) );
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}
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