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Diffstat (limited to 'boot/mach-crt0.c')
| -rw-r--r-- | boot/mach-crt0.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/boot/mach-crt0.c b/boot/mach-crt0.c deleted file mode 100644 index 0469424e..00000000 --- a/boot/mach-crt0.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1991,1990,1989 Carnegie Mellon University - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" - * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR - * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * Carnegie Mellon requests users of this software to return to - * - * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU - * School of Computer Science - * Carnegie Mellon University - * Pittsburgh PA 15213-3890 - * - * any improvements or extensions that they make and grant Carnegie Mellon - * the rights to redistribute these changes. - */ -/* - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * William Jolitz. - * - * Redistribution and use in source and binary forms are permitted - * provided that: (1) source distributions retain this entire copyright - * notice and comment, and (2) distributions including binaries display - * the following acknowledgement: ``This product includes software - * developed by the University of California, Berkeley and its contributors'' - * in the documentation or other materials provided with the distribution - * and in all advertising materials mentioning features or use of this - * software. Neither the name of the University nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#ifndef lint -static char sccsid[] = "@(#)crt0.c 5.2 (Berkeley) 5/14/90"; -#endif /* not lint */ - -/* - * C start up routine. - * Robert Henry, UCB, 20 Oct 81 - * - * We make the following (true) assumptions: - * 1) when the kernel calls start, it does a jump to location 2, - * and thus avoids the register save mask. We are NOT called - * with a calls! see sys1.c:setregs(). - * 2) The only register variable that we can trust is sp, - * which points to the base of the kernel calling frame. - * Do NOT believe the documentation in exec(2) regarding the - * values of fp and ap. - * 3) We can allocate as many register variables as we want, - * and don't have to save them for anybody. - * 4) Because of the ways that asm's work, we can't have - * any automatic variables allocated on the stack, because - * we must catch the value of sp before any automatics are - * allocated. - */ - -#include <mach/machine/asm.h> - -int __data_start = 0; -char **environ = (char **)0; -#ifdef paranoid -static int fd; -#endif paranoid - -int (*mach_init_routine)(); -int (*_cthread_init_routine)(); -int (*_cthread_exit_routine)(); -int (*_monstartup_routine)(); -int (*_StrongBox_init_routine)(); -int errno = 0; -int exit(); - -extern int main(); - -extern unsigned char etext; -int _start() -{ - __label__ eprol; - struct kframe { - int kargc; - char *kargv[1]; /* size depends on kargc */ - char kargstr[1]; /* size varies */ - char kenvstr[1]; /* size varies */ - }; - /* - * ALL REGISTER VARIABLES!!! - */ - register struct kframe *kfp; /* r10 */ - register char **targv; - register char **argv; - -#ifdef lint - kfp = 0; - initcode = initcode = 0; -#else not lint -#define Entry_sp() \ -({ int _spl__, _tmp1__; \ - asm volatile("leal 4(%%ebp), %0" : "=r" (_spl__) : "r" (_tmp1__)); \ - _spl__; }) - - kfp = (struct kframe *)Entry_sp(); -#endif not lint - for (argv = targv = &kfp->kargv[0]; *targv++; /* void */) - /* void */ ; - if (targv >= (char **)(*argv)) - --targv; - environ = targv; - if (mach_init_routine) - (void) mach_init_routine(); - - eprol: -#ifdef paranoid - /* - * The standard I/O library assumes that file descriptors 0, 1, and 2 - * are open. If one of these descriptors is closed prior to the start - * of the process, I/O gets very confused. To avoid this problem, we - * insure that the first three file descriptors are open before calling - * main(). Normally this is undefined, as it adds two unnecessary - * system calls. - */ - do { - fd = open("/dev/null", 2); - } while (fd >= 0 && fd < 3); - close(fd); -#endif paranoid - - - if (_cthread_init_routine) { - int new_sp; - new_sp = (*_cthread_init_routine)(); - if (new_sp) { - asm volatile("movl %0, %%esp" : : "g" (new_sp) ); - } - } - if (_StrongBox_init_routine) (*_StrongBox_init_routine)(); - - if (_monstartup_routine) { - _monstartup_routine(&&eprol, &etext); - } - - (* (_cthread_exit_routine ? _cthread_exit_routine : exit)) - (main(kfp->kargc, argv, targv)); -} |