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1.1 root 1: /*-
2: * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)boot.c 7.4 (Berkeley) 5/5/91
34: */
35:
36: #include <sys/param.h>
37: #include <sys/reboot.h>
38: #include <a.out.h>
39: #include "saio.h"
40:
41: #ifndef INSECURE
42: #include "sys/stat.h"
43: struct stat sb;
44: #endif
45: /* XXX -- see sys/reboot.h */
46: #define B_MAKEDEV(a,u,p,t) \
47: (((a) << B_ADAPTORSHIFT) | ((u) << B_UNITSHIFT) | \
48: ((p) << B_PARTITIONSHIFT) | ((t) << B_TYPESHIFT))
49:
50: /*
51: * Boot program... arguments in `devtype' and `howto' determine
52: * whether boot stops to ask for system name and which device
53: * boot comes from.
54: */
55:
56: /* Types in `devtype' specifying major device */
57: char devname[][2] = {
58: '\0', '\0', /* 0 = ct */
59: '\0', '\0', /* 1 = fd */
60: 'r', 'd', /* 2 = rd */
61: '\0', '\0', /* 3 = sw */
62: 's', 'd', /* 4 = sd */
63: };
64: #define MAXTYPE (sizeof(devname) / sizeof(devname[0]))
65:
66: char line[100];
67:
68: int retry = 0;
69: extern char *lowram;
70: extern int noconsole;
71: extern int howto, devtype;
72:
73: #define MSUS (0xfffffedc)
74:
75: char rom2mdev[] = {
76: 0, /* 0 - none */
77: 0, /* 1 - none */
78: 0, /* 2 - none */
79: 0, /* 3 - none */
80: 0, /* 4 - none */
81: 0, /* 5 - none */
82: 0, /* 6 - none */
83: 0, /* 7 - none */
84: 0, /* 8 - none */
85: 0, /* 9 - none */
86: 0, /* 10 - none */
87: 0, /* 11 - none */
88: 0, /* 12 - none */
89: 0, /* 13 - none */
90: 4, /* 14 - SCSI disk */
91: 0, /* 15 - none */
92: 2, /* 16 - CS/80 device on HPIB */
93: 2, /* 17 - CS/80 device on HPIB */
94: 0, /* 18 - none */
95: 0, /* 19 - none */
96: 0, /* 20 - none */
97: 0, /* 21 - none */
98: 0, /* 22 - none */
99: 0, /* 23 - none */
100: 0, /* 24 - none */
101: 0, /* 25 - none */
102: 0, /* 26 - none */
103: 0, /* 27 - none */
104: 0, /* 28 - none */
105: 0, /* 29 - none */
106: 0, /* 30 - none */
107: 0, /* 31 - none */
108: };
109:
110: main()
111: {
112: register type, part, unit, io;
113: register char *cp;
114:
115: printf("\nBoot\n");
116: #ifdef JUSTASK
117: howto = RB_ASKNAME|RB_SINGLE;
118: #else
119: type = (devtype >> B_TYPESHIFT) & B_TYPEMASK;
120: unit = (devtype >> B_UNITSHIFT) & B_UNITMASK;
121: unit += 8 * ((devtype >> B_ADAPTORSHIFT) & B_ADAPTORMASK);
122: part = (devtype >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
123: if ((howto & RB_ASKNAME) == 0) {
124: if ((devtype & B_MAGICMASK) != B_DEVMAGIC) {
125: /*
126: * we have to map the ROM device type codes
127: * to Unix major device numbers.
128: */
129: type = rom2mdev[*(char *)MSUS & 0x1f];
130: devtype = (devtype &~ (B_TYPEMASK << B_TYPESHIFT))
131: | (type << B_TYPESHIFT);
132: }
133: if (type >= 0 && type <= MAXTYPE && devname[type][0]) {
134: cp = line;
135: *cp++ = devname[type][0];
136: *cp++ = devname[type][1];
137: *cp++ = '(';
138: if (unit >= 10)
139: *cp++ = unit / 10 + '0';
140: *cp++ = unit % 10 + '0';
141: *cp++ = ',';
142: *cp++ = part + '0';
143: *cp++ = ')';
144: strcpy(cp, UNIX);
145: } else
146: howto = RB_SINGLE|RB_ASKNAME;
147: }
148: #endif
149: for (;;) {
150: if (!noconsole && (howto & RB_ASKNAME)) {
151: printf(": ");
152: gets(line);
153: } else
154: printf(": %s\n", line);
155: io = open(line, 0);
156: if (io >= 0) {
157: #ifndef INSECURE
158: (void) fstat(io, &sb);
159: if (sb.st_uid || (sb.st_mode & 2)) {
160: printf("non-secure file, will not load\n");
161: howto = RB_SINGLE|RB_ASKNAME;
162: continue;
163: }
164: #endif
165: if (howto & RB_ASKNAME) {
166: /*
167: * Build up devtype register to pass on to
168: * booted program.
169: */
170: cp = line;
171: for (type = 0; type <= MAXTYPE; type++)
172: if ((devname[type][0] == cp[0]) &&
173: (devname[type][1] == cp[1]))
174: break;
175: if (type <= MAXTYPE) {
176: cp += 3;
177: unit = *cp++ - '0';
178: if (*cp >= '0' && *cp <= '9')
179: unit = unit * 10 + *cp++ - '0';
180: cp++;
181: part = atol(cp);
182: devtype = B_MAKEDEV(unit >> 3, unit & 7, part, type);
183: }
184: }
185: devtype |= B_DEVMAGIC;
186: copyunix(howto, devtype, io);
187: close(io);
188: howto = RB_SINGLE|RB_ASKNAME;
189: }
190: bad:
191: if (++retry > 2)
192: howto = RB_SINGLE|RB_ASKNAME;
193: }
194: }
195:
196: /*ARGSUSED*/
197: copyunix(howto, devtype, io)
198: register howto; /* d7 contains boot flags */
199: register devtype; /* d6 contains boot device */
200: register io;
201: {
202: struct exec x;
203: register int i;
204: register char *load; /* a5 contains load addr for unix */
205: register char *addr;
206:
207: i = read(io, (char *)&x, sizeof x);
208: if (i != sizeof x ||
209: (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
210: _stop("Bad format\n");
211: printf("%d", x.a_text);
212: if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1)
213: goto shread;
214: load = addr = lowram;
215: if (read(io, (char *)addr, x.a_text) != x.a_text)
216: goto shread;
217: addr += x.a_text;
218: if (x.a_magic == 0413 || x.a_magic == 0410)
219: while ((int)addr & CLOFSET)
220: *addr++ = 0;
221: printf("+%d", x.a_data);
222: if (read(io, addr, x.a_data) != x.a_data)
223: goto shread;
224: addr += x.a_data;
225: printf("+%d", x.a_bss);
226: x.a_bss += 128*512; /* slop */
227: for (i = 0; i < x.a_bss; i++)
228: *addr++ = 0;
229: x.a_entry += (int)lowram;
230: printf(" start 0x%x\n", x.a_entry);
231: #ifdef __GNUC__
232: asm(" movl %0,d7" : : "m" (howto));
233: asm(" movl %0,d6" : : "m" (devtype));
234: asm(" movl %0,a5" : : "a" (load));
235: #endif
236: (*((int (*)()) x.a_entry))();
237: exit();
238: shread:
239: _stop("Short read\n");
240: }
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