129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
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/*
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* Copyright 2001 David E. O'Brien
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* All rights reserved.
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* Copyright (c) 1995, 1998 Berkeley Software Design, Inc.
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* All rights reserved.
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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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* 3. The name of the authors 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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#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 "crtbrand.c"
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struct Struct_Obj_Entry;
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struct ps_strings;
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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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#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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char **environ;
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char *__progname = "";
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/* The entry function. */
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*
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* %o0 holds ps_strings pointer. For Solaris compat and/or shared
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* libraries, if %g1 is not 0, it is a routine to pass to atexit().
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* (By passing the pointer in the usual argument register, we avoid
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* having to do any inline assembly, except to recover %g1.)
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*
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* Note: kernel may (is not set in stone yet) pass ELF aux vector in %o1,
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* but for now we do not use it here.
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*/
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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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struct Struct_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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void (*term)(void);
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/* Grab %g1 before it gets used for anything by the compiler. */
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/* Sparc ELF psABI specifies a termination routine (if any) will be in
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%g1 */
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__asm__ volatile("mov %%g1,%0" : "=r"(term));
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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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/*
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* If the kernel or a shared library wants us to call
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* a termination function, arrange to do so.
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*/
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if (term)
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atexit(term);
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if (&_DYNAMIC != NULL)
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atexit(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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/*
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* NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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