b8e4cd2bb3
It boots FreeBSD from a running MS-DOS system. It's compiled using some MS-DOS tools, but there is a binary hidden in the uuencoded file. (Go ahead, flame me if you can come up with a solution for the problem. Just saying "this is bad" doesn't count!) Rod, you were right: one would have to deal with weird interfaces to the memory managers, and it seems that Christian found them all, and made them work. Thanks Christian! Reviewed by: phk Submitted by: DI. Christian Gusenbauer <cg@fimp01.fim.uni-linz.ac.at> Christians README: ------------------ Hi Everybody! This is version 1.5 of "fbsdboot", a program that allows you to boot a kernel from a MS-DOS partition or a FreeBSD partition. This program runs using DOS. It works with various memory managers (like EMM386, 386MAX) under certain circumstances. First, a FreeBSD kernel is always loaded to memory starting at 0x100000. To assure that loading the kernel *does not* overwrite memory used by memory managers, high memory for the kernel is allocated and after loading the kernel it's moved to 0x100000. Second, there are many ways to switch to protected mode which is necessary to start the kernel. Each BIOS gives you the possibility to use INT15H (AH=89H) to do that. But some memory-managers like 386max does not allow you to use this method. An other way to do the switch is to use DPMI services, but they do not guarantee, that the protected mode application is executed with privilege level 0. Therefore this method is *not* used. VCPI services offer another way to switch to protected mode, and VCPI servers are built into "emm386.exe", "386max" and "qemm". That's why, this method is implemented in fbsdboot.exe. Fbsdboot.exe tries to switch to protected mode using VCPI services. If they're not available INT15H is used to do the switch. If that fails, it's not possible for this version of fbsdboot.exe to boot a kernel :-(. You can get commandline options of fbsdboot if you start it with "-?" as option! I don't know, if fbsdboot works with QEMM, as I don't have the possibility to test it. Enjoy and have fun! Christian. cg@fimp01.fim.uni-linz.ac.at PS: Many thanks to Bruce Evans for his assistance!
282 lines
11 KiB
C
282 lines
11 KiB
C
/*
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* Copyright (c) 1982, 1989 The Regents of the University of California.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)inode.h 7.17 (Berkeley) 5/8/91
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* $Id: inode.h,v 1.6 1993/12/19 00:55:37 wollman Exp $
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*/
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#ifndef _UFS_INODE_H_
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#define _UFS_INODE_H_ 1
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#ifdef KERNEL
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include "../ufs/dinode.h"
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#else
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#include "dinode.h"
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#endif
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/*
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* The inode is used to describe each active (or recently active)
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* file in the UFS filesystem. It is composed of two types of
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* information. The first part is the information that is needed
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* only while the file is active (such as the identity of the file
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* and linkage to speed its lookup). The second part is the
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* permannent meta-data associated with the file which is read
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* in from the permanent dinode from long term storage when the
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* file becomes active, and is put back when the file is no longer
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* being used.
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*/
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struct inode {
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struct inode *i_chain[2]; /* hash chain, MUST be first */
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struct vnode *i_vnode; /* vnode associated with this inode */
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struct vnode *i_devvp; /* vnode for block I/O */
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u_long i_flag; /* see below */
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dev_t i_dev; /* device where inode resides */
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ino_t i_number; /* the identity of the inode */
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struct fs *i_fs; /* filesystem associated with this inode */
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struct dquot *i_dquot[MAXQUOTAS]; /* pointer to dquot structures */
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struct lockf *i_lockf; /* head of byte-level lock list */
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long i_diroff; /* offset in dir, where we found last entry */
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off_t i_endoff; /* end of useful stuff in directory */
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long i_spare0;
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long i_spare1;
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struct dinode i_din; /* the on-disk dinode */
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};
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#define FASTLINK(ip) (DFASTLINK((ip)->i_din))
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#define i_symlink i_din.di_symlink
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#define i_mode i_din.di_mode
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#define i_nlink i_din.di_nlink
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#define i_uid i_din.di_uid
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#define i_gid i_din.di_gid
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#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */
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#define i_size i_din.di_qsize.val[0]
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#else /* BYTE_ORDER == BIG_ENDIAN */
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#define i_size i_din.di_qsize.val[1]
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#endif
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#define i_db i_din.di_db
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#define i_ib i_din.di_ib
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#define i_atime i_din.di_atime
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#define i_mtime i_din.di_mtime
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#define i_ctime i_din.di_ctime
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#define i_blocks i_din.di_blocks
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#define i_rdev i_din.di_db[0]
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#define i_flags i_din.di_flags
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#define i_gen i_din.di_gen
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#define i_forw i_chain[0]
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#define i_back i_chain[1]
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#define i_di_spare i_din.di_spare
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/* flags */
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#define ILOCKED 0x0001 /* inode is locked */
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#define IWANT 0x0002 /* some process waiting on lock */
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#define IRENAME 0x0004 /* inode is being renamed */
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#define IUPD 0x0010 /* file has been modified */
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#define IACC 0x0020 /* inode access time to be updated */
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#define ICHG 0x0040 /* inode has been changed */
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#define IMOD 0x0080 /* inode has been modified */
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#define ISHLOCK 0x0100 /* file has shared lock */
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#define IEXLOCK 0x0200 /* file has exclusive lock */
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#define ILWAIT 0x0400 /* someone waiting on file lock */
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#ifdef KERNEL
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/*
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* Convert between inode pointers and vnode pointers
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*/
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#define VTOI(vp) ((struct inode *)(vp)->v_data)
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#define ITOV(ip) ((ip)->i_vnode)
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/*
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* Convert between vnode types and inode formats
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*/
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extern enum vtype iftovt_tab[];
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extern int vttoif_tab[];
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#define IFTOVT(mode) (iftovt_tab[((mode) & IFMT) >> 12])
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#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
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#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
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extern u_long nextgennumber; /* next generation number to assign */
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extern ino_t dirpref();
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/*
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* Lock and unlock inodes.
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*/
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#ifdef notdef
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#define ILOCK(ip) { \
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while ((ip)->i_flag & ILOCKED) { \
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(ip)->i_flag |= IWANT; \
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(void) sleep((caddr_t)(ip), PINOD); \
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} \
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(ip)->i_flag |= ILOCKED; \
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}
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#define IUNLOCK(ip) { \
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(ip)->i_flag &= ~ILOCKED; \
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if ((ip)->i_flag&IWANT) { \
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(ip)->i_flag &= ~IWANT; \
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wakeup((caddr_t)(ip)); \
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} \
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}
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#else
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#define ILOCK(ip) ilock(ip)
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#define IUNLOCK(ip) iunlock(ip)
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#endif
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#define IUPDAT(ip, t1, t2, waitfor) { \
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if (ip->i_flag&(IUPD|IACC|ICHG|IMOD)) \
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(void) iupdat(ip, t1, t2, waitfor); \
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}
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#define ITIMES(ip, t1, t2) { \
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if ((ip)->i_flag&(IUPD|IACC|ICHG)) { \
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(ip)->i_flag |= IMOD; \
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if ((ip)->i_flag&IACC) \
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(ip)->i_atime = (t1)->tv_sec; \
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if ((ip)->i_flag&IUPD) \
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(ip)->i_mtime = (t2)->tv_sec; \
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if ((ip)->i_flag&ICHG) \
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(ip)->i_ctime = time.tv_sec; \
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(ip)->i_flag &= ~(IACC|IUPD|ICHG); \
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} \
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}
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/*
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* This overlays the fid sturcture (see mount.h)
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*/
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struct ufid {
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u_short ufid_len; /* length of structure */
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u_short ufid_pad; /* force long alignment */
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ino_t ufid_ino; /* file number (ino) */
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long ufid_gen; /* generation number */
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};
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/*
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* Prototypes for UFS vnode operations
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*/
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int ufs_lookup __P((struct vnode *vp, struct nameidata *ndp, struct proc *p));
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int ufs_create __P((struct nameidata *ndp, struct vattr *vap, struct proc *p));
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int ufs_mknod __P((struct nameidata *ndp, struct vattr *vap, struct ucred *cred,
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struct proc *p));
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int ufs_open __P((struct vnode *vp, int mode, struct ucred *cred,
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struct proc *p));
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int ufs_close __P((struct vnode *vp, int fflag, struct ucred *cred,
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struct proc *p));
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int ufs_access __P((struct vnode *vp, int mode, struct ucred *cred,
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struct proc *p));
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int ufs_getattr __P((struct vnode *vp, struct vattr *vap, struct ucred *cred,
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struct proc *p));
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int ufs_setattr __P((struct vnode *vp, struct vattr *vap, struct ucred *cred,
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struct proc *p));
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int ufs_read __P((struct vnode *vp, struct uio *uio, int ioflag,
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struct ucred *cred));
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int ufs_write __P((struct vnode *vp, struct uio *uio, int ioflag,
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struct ucred *cred));
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int ufs_ioctl __P((struct vnode *vp, int command, caddr_t data, int fflag,
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struct ucred *cred, struct proc *p));
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int ufs_select __P((struct vnode *vp, int which, int fflags, struct ucred *cred,
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struct proc *p));
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int ufs_mmap __P((struct vnode *vp, int fflags, struct ucred *cred,
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struct proc *p));
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int ufs_fsync __P((struct vnode *vp, int fflags, struct ucred *cred,
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int waitfor, struct proc *p));
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int ufs_seek __P((struct vnode *vp, off_t oldoff, off_t newoff,
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struct ucred *cred));
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int ufs_remove __P((struct nameidata *ndp, struct proc *p));
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int ufs_link __P((struct vnode *vp, struct nameidata *ndp, struct proc *p));
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int ufs_rename __P((struct nameidata *fndp, struct nameidata *tdnp,
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struct proc *p));
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int ufs_mkdir __P((struct nameidata *ndp, struct vattr *vap, struct proc *p));
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int ufs_rmdir __P((struct nameidata *ndp, struct proc *p));
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int ufs_symlink __P((struct nameidata *ndp, struct vattr *vap, char *target,
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struct proc *p));
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int ufs_readdir __P((struct vnode *vp, struct uio *uio, struct ucred *cred,
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int *eofflagp));
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int ufs_readlink __P((struct vnode *vp, struct uio *uio, struct ucred *cred));
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int ufs_abortop __P((struct nameidata *ndp));
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int ufs_inactive __P((struct vnode *vp, struct proc *p));
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int ufs_reclaim __P((struct vnode *vp));
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int ufs_lock __P((struct vnode *vp));
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int ufs_unlock __P((struct vnode *vp));
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int ufs_bmap __P((struct vnode *vp, daddr_t bn, struct vnode **vpp,
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daddr_t *bnp));
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int ufs_strategy __P((struct buf *bp));
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void ufs_print __P((struct vnode *vp));
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int ufs_islocked __P((struct vnode *vp));
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int ufs_advlock __P((struct vnode *vp, caddr_t id, int op, struct flock *fl,
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int flags));
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extern void blkfree(struct inode *, daddr_t, off_t);
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extern void ifree(struct inode *, ino_t, int);
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extern void iput(struct inode *);
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extern void ilock(struct inode *);
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extern void iunlock(struct inode *);
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extern void dirbad(struct inode *, off_t, char *);
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extern int alloc(struct inode *, daddr_t, daddr_t, int, daddr_t *);
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extern int realloccg(struct inode *, off_t, daddr_t, int, int, struct buf **);
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extern int ialloc(struct inode *, ino_t, int, struct ucred *, struct inode **);
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extern daddr_t blkpref(struct inode *, daddr_t, int, daddr_t *);
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extern u_long hashalloc(struct inode *, int, long, int,
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u_long (*)(struct inode *, int, long, int));
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extern daddr_t fragextend(struct inode *, int, long, int, int);
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extern daddr_t alloccg(struct inode *, int, daddr_t, int);
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struct cg; /* I really don't want to know why */
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struct direct; /* this header is required by NFS... */
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extern daddr_t alloccgblk(struct fs *, struct cg *, daddr_t);
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extern ino_t ialloccg(struct inode *, int, daddr_t, int);
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extern int ufs_lookup(struct vnode *, struct nameidata *, struct proc *);
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extern int dirbadentry(struct direct *, int);
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extern int direnter(struct inode *, struct nameidata *);
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extern int dirremove(struct nameidata *);
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extern int dirrewrite(struct inode *, struct inode *, struct nameidata *);
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extern int blkatoff(struct inode *, off_t, char **, struct buf **);
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extern int dirempty(struct inode *, ino_t, struct ucred *);
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extern int checkpath(struct inode *, struct inode *, struct ucred *);
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extern void ufs_init(void);
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extern int iget(struct inode *, ino_t, struct inode **);
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extern int ufs_inactive(struct vnode *, struct proc *);
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extern int ufs_reclaim(struct vnode *);
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extern int iupdat(struct inode *, struct timeval *, struct timeval *,
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int);
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extern int itrunc(struct inode *, u_long, int);
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extern int indirtrunc(struct inode *, daddr_t, daddr_t, int, long *);
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extern int bmap(struct inode *, daddr_t, daddr_t *);
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extern int balloc(struct inode *, daddr_t, int, struct buf **, int);
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#endif /* KERNEL */
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#endif /* _UFS_INODE_H_ */
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