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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 is only permitted until one year after the first shipment
6: * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
7: * binary forms are permitted provided that: (1) source distributions retain
8: * this entire copyright notice and comment, and (2) distributions including
9: * binaries display the following acknowledgement: This product includes
10: * software developed by the University of California, Berkeley and its
11: * contributors'' in the documentation or other materials provided with the
12: * distribution and in all advertising materials mentioning features or use
13: * of this software. Neither the name of the University nor the names of
14: * its contributors may be used to endorse or promote products derived from
15: * this software without specific prior written permission.
16: * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
18: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19: *
20: * @(#)boot.c 7.1 (Berkeley) 5/8/90
21: */
22:
23: #include <a.out.h>
24: #include "saio.h"
25: #include "../sys/reboot.h"
26:
27: #ifndef INSECURE
28: #include "../sys/stat.h"
29: struct stat sb;
30: #endif
31:
32: #define B_MAKEDEV(a,u,p,t) \
33: (((a) << B_ADAPTORSHIFT) | ((u) << B_UNITSHIFT) | \
34: ((p) << B_PARTITIONSHIFT) | ((t) << B_TYPESHIFT))
35:
36: /*
37: * Boot program... arguments in `devtype' and `howto' determine
38: * whether boot stops to ask for system name and which device
39: * boot comes from.
40: */
41:
42: /* Types in `devtype' specifying major device */
43: char devname[][2] = {
44: 0,0, /* 0 = ct */
45: 0,0, /* 1 = fd */
46: 'r','d', /* 2 = rd */
47: 0,0, /* 3 = sw */
48: 's','d', /* 4 = sd */
49: };
50: #define MAXTYPE (sizeof(devname) / sizeof(devname[0]))
51:
52: #define UNIX "vmunix"
53: char line[100];
54:
55: int retry = 0;
56: extern char *lowram;
57: extern int noconsole;
58: extern int howto, devtype;
59:
60: #define MSUS (0xfffffedc)
61:
62: char rom2mdev[] = {
63: 0, /* 0 - none */
64: 0, /* 1 - none */
65: 0, /* 2 - none */
66: 0, /* 3 - none */
67: 0, /* 4 - none */
68: 0, /* 5 - none */
69: 0, /* 6 - none */
70: 0, /* 7 - none */
71: 0, /* 8 - none */
72: 0, /* 9 - none */
73: 0, /* 10 - none */
74: 0, /* 11 - none */
75: 0, /* 12 - none */
76: 0, /* 13 - none */
77: 4, /* 14 - SCSI disk */
78: 0, /* 15 - none */
79: 2, /* 16 - CS/80 device on HPIB */
80: 2, /* 17 - CS/80 device on HPIB */
81: 0, /* 18 - none */
82: 0, /* 19 - none */
83: 0, /* 20 - none */
84: 0, /* 21 - none */
85: 0, /* 22 - none */
86: 0, /* 23 - none */
87: 0, /* 24 - none */
88: 0, /* 25 - none */
89: 0, /* 26 - none */
90: 0, /* 27 - none */
91: 0, /* 28 - none */
92: 0, /* 29 - none */
93: 0, /* 30 - none */
94: 0, /* 31 - none */
95: };
96:
97: main()
98: {
99: register type, part, unit, io;
100: register char *cp;
101:
102: printf("\nBoot\n");
103: #ifdef JUSTASK
104: howto = RB_ASKNAME|RB_SINGLE;
105: #else
106: type = (devtype >> B_TYPESHIFT) & B_TYPEMASK;
107: unit = (devtype >> B_UNITSHIFT) & B_UNITMASK;
108: unit += 8 * ((devtype >> B_ADAPTORSHIFT) & B_ADAPTORMASK);
109: part = (devtype >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
110: if ((howto & RB_ASKNAME) == 0) {
111: if ((devtype & B_MAGICMASK) != B_DEVMAGIC) {
112: /*
113: * we have to map the ROM device type codes
114: * to Unix major device numbers.
115: */
116: type = rom2mdev[*(char *)MSUS & 0x1f];
117: devtype = (devtype &~ (B_TYPEMASK << B_TYPESHIFT))
118: | (type << B_TYPESHIFT);
119: }
120: if (type >= 0 && type <= MAXTYPE && devname[type][0]) {
121: cp = line;
122: *cp++ = devname[type][0];
123: *cp++ = devname[type][1];
124: *cp++ = '(';
125: if (unit >= 10)
126: *cp++ = unit / 10 + '0';
127: *cp++ = unit % 10 + '0';
128: *cp++ = ',';
129: *cp++ = part + '0';
130: *cp++ = ')';
131: strcpy(cp, UNIX);
132: } else
133: howto = RB_SINGLE|RB_ASKNAME;
134: }
135: #endif
136: for (;;) {
137: if (!noconsole && (howto & RB_ASKNAME)) {
138: printf(": ");
139: gets(line);
140: } else
141: printf(": %s\n", line);
142: io = open(line, 0);
143: if (io >= 0) {
144: #ifndef INSECURE
145: (void) fstat(io, &sb);
146: if (sb.st_uid || (sb.st_mode & 2)) {
147: printf("non-secure file, will not load\n");
148: howto = RB_SINGLE|RB_ASKNAME;
149: continue;
150: }
151: #endif
152: if (howto & RB_ASKNAME) {
153: /*
154: * Build up devtype register to pass on to
155: * booted program.
156: */
157: cp = line;
158: for (type = 0; type <= MAXTYPE; type++)
159: if ((devname[type][0] == cp[0]) &&
160: (devname[type][1] == cp[1]))
161: break;
162: if (type <= MAXTYPE) {
163: cp += 3;
164: unit = *cp++ - '0';
165: if (*cp >= '0' && *cp <= '9')
166: unit = unit * 10 + *cp++ - '0';
167: cp++;
168: part = atol(cp);
169: devtype = B_MAKEDEV(unit >> 3, unit & 7, part, type);
170: }
171: }
172: devtype |= B_DEVMAGIC;
173: copyunix(howto, devtype, io);
174: close(io);
175: howto = RB_SINGLE|RB_ASKNAME;
176: }
177: bad:
178: if (++retry > 2)
179: howto = RB_SINGLE|RB_ASKNAME;
180: }
181: }
182:
183: /*ARGSUSED*/
184: copyunix(howto, devtype, io)
185: register howto; /* d7 contains boot flags */
186: register devtype; /* d6 contains boot device */
187: register io;
188: {
189: struct exec x;
190: register int i;
191: register char *load; /* a5 contains load addr for unix */
192: register char *addr;
193:
194: i = read(io, (char *)&x, sizeof x);
195: if (i != sizeof x ||
196: (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
197: _stop("Bad format\n");
198: printf("%d", x.a_text);
199: if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1)
200: goto shread;
201: load = addr = lowram;
202: if (read(io, (char *)addr, x.a_text) != x.a_text)
203: goto shread;
204: addr += x.a_text;
205: if (x.a_magic == 0413 || x.a_magic == 0410)
206: while ((int)addr & CLOFSET)
207: *addr++ = 0;
208: printf("+%d", x.a_data);
209: if (read(io, addr, x.a_data) != x.a_data)
210: goto shread;
211: addr += x.a_data;
212: printf("+%d", x.a_bss);
213: x.a_bss += 128*512; /* slop */
214: for (i = 0; i < x.a_bss; i++)
215: *addr++ = 0;
216: x.a_entry += (int)lowram;
217: printf(" start 0x%x\n", x.a_entry);
218: #ifdef __GNUC__
219: asm(" movl %0,d7" : : "m" (howto));
220: asm(" movl %0,d6" : : "m" (devtype));
221: asm(" movl %0,a5" : : "a" (load));
222: #endif
223: (*((int (*)()) x.a_entry))();
224: exit();
225: shread:
226: _stop("Short read\n");
227: }
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