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/* $OpenBSD: crt0.c,v 1.2 2005/08/04 16:33:05 espie Exp $ */
/*
* Copyright (c) 2001 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
int global __asm ("$global$") = 0;
#include <sys/param.h>
#include <sys/syscall.h>
#include <sys/fcntl.h>
#include <sys/exec.h>
#include <stdlib.h>
#include <paths.h>
typedef char Obj_Entry;
/*
* Lots of the chunks of this file cobbled together from pieces of
* other OpenBSD crt files, including the common code.
*/
char **environ;
extern void __init(void);
extern void __fini(void);
#ifdef MCRT0
extern void monstartup(u_long, u_long);
extern void _mcleanup(void);
extern unsigned char etext, eprol;
#endif /* MCRT0 */
void __start(char **, void (*)(void), const Obj_Entry *);
static char *__strrchr(const char *p, char ch);
char *__progname = "";
char __progname_storage[NAME_MAX+1];
void __start(char **sp, void (*cleanup)(void), const Obj_Entry *obj);
__asm(
".import $global$, data\n\t"
".import ___start, code\n\t"
".text\n\t"
".align 4\n\t"
".export _start, entry\n\t"
".export __start, entry\n\t"
".type _start,@function\n\t"
".type __start,@function\n\t"
".label _start\n\t"
".label __start\n\t"
".proc\n\t"
".callinfo frame=0, calls\n\t"
".entry\n\t"
"ldil L%$global$, %r27\n\t"
".call\n\t"
"b ___start\n\t"
"ldo R%$global$(%r27), %r27\n\t"
".exit\n\t"
".procend\n\t");
void
___start(sp, cleanup, obj)
char **sp;
void (*cleanup)(void); /* from shared loader */
const Obj_Entry *obj; /* from shared loader */
{
struct ps_strings *arginfo = (struct ps_strings *)sp;
char **argv, *namep;
char *s;
argv = arginfo->ps_argvstr;
environ = arginfo->ps_envstr;
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = __strrchr(namep, '/')) == NULL)
__progname = namep;
else
__progname++;
for (s = __progname_storage; *__progname &&
s < &__progname_storage[sizeof __progname_storage - 1]; )
*s++ = *__progname++;
*s = '\0';
__progname = __progname_storage;
}
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif
__init();
exit(main(arginfo->ps_nargvstr, argv, environ));
}
static char *
__strrchr(const char *p, char ch)
{
char *save;
for (save = NULL;; ++p) {
if (*p == ch)
save = (char *)p;
if (!*p)
return(save);
}
}
#ifdef MCRT0
__asm (".export eprol, entry\n\t.label eprol");
#endif
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