exec.c revision 1.6 
1/*	$NetBSD: exec.c,v 1.6 1999/01/28 20:21:24 christos Exp $	 */
2
3/*
4 * Copyright (c) 1982, 1986, 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 * Copyright (c) 1996
7 *	Matthias Drochner.  All rights reserved.
8 * Copyright (c) 1996
9 * 	Perry E. Metzger.  All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the University of
22 *	California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * 	@(#)boot.c	8.1 (Berkeley) 6/10/93
40 */
41
42/*
43 * starts NetBSD a.out kernel needs lowlevel startup from startprog.S
44 */
45#include <sys/param.h>
46#include <sys/reboot.h>
47#ifdef COMPAT_OLDBOOT
48#include <sys/disklabel.h>
49#endif
50
51#include <lib/libsa/stand.h>
52
53#include "loadfile.h"
54#include "libi386.h"
55#include "bootinfo.h"
56
57#ifdef COMPAT_OLDBOOT
58static int
59dev2major(devname, major)
60	char           *devname;
61	int            *major;
62{
63	static char    *devices[] = {"wd", "", "fd", "", "sd"};
64#define NUMDEVICES (sizeof(devices)/sizeof(char *))
65	int             i;
66
67	for (i = 0; i < NUMDEVICES; i++)
68		if (!strcmp(devname, devices[i])) {
69			*major = i;
70			return (0);
71		}
72	return (-1);
73}
74#endif
75#define BOOT_NARGS	6
76
77extern struct btinfo_console btinfo_console;
78
79int
80exec_netbsd(file, loadaddr, boothowto)
81	const char     *file;
82	physaddr_t      loadaddr;
83	int             boothowto;
84{
85	u_long          boot_argv[BOOT_NARGS];
86	int		fd;
87#ifdef COMPAT_OLDBOOT
88	char           *fsname, *devname;
89	int             unit, part;
90	const char     *filename;
91	int             bootdevnr;
92	u_long		marks[LOAD_MAX];
93	struct btinfo_symtab btinfo_symtab;
94#endif
95
96#ifdef	DEBUG
97	printf("exec: file=%s loadaddr=0x%lx\n", file, loadaddr);
98#endif
99
100	BI_ALLOC(6); /* ??? */
101
102	BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console));
103
104	marks[LOAD_START] = loadaddr;
105	if ((fd = loadfile(file, marks)) == -1)
106		goto out;
107
108	marks[LOAD_END] = (((u_long) marks[LOAD_END] + sizeof(int) - 1)) &
109	    (-sizeof(int));
110
111	btinfo_symtab.nsym = marks[LOAD_NSYM];
112	btinfo_symtab.ssym = marks[LOAD_SYM];
113	btinfo_symtab.esym = marks[LOAD_END];
114	BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab));
115
116	boot_argv[0] = boothowto;
117
118#ifdef COMPAT_OLDBOOT
119	/* prepare boot device information for kernel */
120	if (parsebootfile(file, &fsname, &devname, &unit, &part, &filename)
121	    || strcmp(fsname, "ufs"))
122		bootdevnr = 0;	/* XXX error out if parse error??? */
123	else {
124		int             major;
125
126		if (strcmp(devname, "hd") == 0) {
127			/* generic BIOS disk, have to guess type */
128			struct open_file *f = &files[fd];	/* XXX */
129
130			if (biosdisk_gettype(f) == DTYPE_SCSI)
131				devname = "sd";
132			else
133				devname = "wd";
134
135			/*
136			 * The old boot block performed the following
137			 * conversion:
138			 *
139			 *	hdN -> Xd0
140			 *
141			 * where X is the type specified by the label.
142			 * We mimmick that here, for lack of any better
143			 * way of doing things.
144			 */
145			unit = 0;
146		}
147
148		if (dev2major(devname, &major))
149			bootdevnr = 0;	/* XXX error out??? */
150		else
151			bootdevnr = MAKEBOOTDEV(major, 0, 0, unit, part);
152	}
153
154	boot_argv[1] = bootdevnr;
155#else
156	boot_argv[1] = 0;
157#endif
158#ifdef PASS_BIOSGEOM
159	bi_getbiosgeom();
160#endif
161	boot_argv[2] = vtophys(bootinfo);	/* old cyl offset */
162	boot_argv[3] = marks[LOAD_END];
163	boot_argv[4] = getextmem();
164	boot_argv[5] = getbasemem();
165
166	close(fd);
167
168#ifdef DEBUG
169	printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[LOAD_START],
170	    marks[LOAD_NSYM], marks[LOAD_SYM], marks[LOAD_END]);
171#endif
172
173	startprog(marks[LOAD_START], BOOT_NARGS, boot_argv, 0x90000);
174	panic("exec returned");
175
176out:
177	BI_FREE();
178	bootinfo = 0;
179	return (-1);
180}
181