a124f32704
bring in stddef.h so we can use NULL instead of 0 for pointer comparisons. Hinted at by: Bruce Evans Reviewed by: John Polstra
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/*-
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* Copyright 1996-1998 John D. Polstra.
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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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*
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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 1.2 1998/09/07 23:31:59 jdp 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 <stddef.h>
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#include <stdlib.h>
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typedef void (*fptr)(void);
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extern void _fini(void);
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extern void _init(void);
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extern int main(int, char **, char **);
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#ifdef GCRT
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extern void _mcleanup(void);
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extern void monstartup(void *, void *);
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extern int eprol;
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extern int etext;
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#endif
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extern int _DYNAMIC;
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#pragma weak _DYNAMIC
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#ifdef __i386__
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#define get_rtld_cleanup() \
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({ fptr __value; \
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__asm__("movl %%edx,%0" : "=rm"(__value)); \
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__value; })
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#else
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#error "This file only supports the i386 architecture"
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#endif
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char **environ;
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char *__progname = "";
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void
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_start(char *arguments, ...)
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{
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fptr rtld_cleanup;
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int argc;
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char **argv;
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char **env;
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rtld_cleanup = get_rtld_cleanup();
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argv = &arguments;
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argc = * (int *) (argv - 1);
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env = argv + argc + 1;
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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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atexit(rtld_cleanup);
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#ifdef GCRT
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atexit(_mcleanup);
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#endif
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atexit(_fini);
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#ifdef GCRT
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monstartup(&eprol, &etext);
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#endif
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_init();
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exit( main(argc, argv, env) );
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}
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#ifdef GCRT
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__asm__(".text");
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__asm__("eprol:");
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__asm__(".previous");
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#endif
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