1 7285a491 2004-06-17 devnull #include <u.h>
2 7285a491 2004-06-17 devnull #include <libc.h>
3 7285a491 2004-06-17 devnull #include <bio.h>
4 7285a491 2004-06-17 devnull #include <libsec.h>
6 7285a491 2004-06-17 devnull #include "iso9660.h"
8 7285a491 2004-06-17 devnull /* FreeBSD 4.5 installation CD for reference
9 7285a491 2004-06-17 devnull g% cdsector 17 | xd -b
10 7285a491 2004-06-17 devnull 1+0 records in
11 7285a491 2004-06-17 devnull 1+0 records out
12 7285a491 2004-06-17 devnull 0000000 00 - volume descriptor type (0)
13 7285a491 2004-06-17 devnull 43 44 30 30 31 - "CD001"
14 7285a491 2004-06-17 devnull 01 - volume descriptor version (1)
15 7285a491 2004-06-17 devnull 45 4c 20 54 4f 52 49 54 4f
16 7285a491 2004-06-17 devnull 0000010 20 53 50 45 43 49 46 49 43 41 54 49 4f 4e 00 00
17 7285a491 2004-06-17 devnull 0000020 00 00 00 00 00 00 00 - 7-39 boot system identifier
18 7285a491 2004-06-17 devnull "EL TORITO SPECIFICATION"
20 7285a491 2004-06-17 devnull 00 00 00 00 00 00 00 00 00
21 7285a491 2004-06-17 devnull 0000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
22 7285a491 2004-06-17 devnull 0000040 00 00 00 00 00 00 00 - 39-71 boot identifier
24 7285a491 2004-06-17 devnull boot system use:
26 7285a491 2004-06-17 devnull absolute pointer to the boot catalog??
28 7285a491 2004-06-17 devnull 4d 0c 00 00 00 00 00 00 00
29 7285a491 2004-06-17 devnull 0000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 7285a491 2004-06-17 devnull 0000580 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
31 7285a491 2004-06-17 devnull 0000590 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
32 7285a491 2004-06-17 devnull 00005a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
33 7285a491 2004-06-17 devnull g% cdsector 3149 | xd -b # 0x0c4d
34 7285a491 2004-06-17 devnull 1+0 records in
35 7285a491 2004-06-17 devnull 1+0 records out
36 7285a491 2004-06-17 devnull 0000000 01 - header (1)
37 7285a491 2004-06-17 devnull 00 - platform id (0 = 0x86)
38 7285a491 2004-06-17 devnull 00 00 - reserved 0
39 7285a491 2004-06-17 devnull 00 00 00 00 00 00 00 00 00 00 00 00
40 7285a491 2004-06-17 devnull 0000010 00 00 00 00 00 00 00 00 00 00 00 00 - id string
41 7285a491 2004-06-17 devnull aa 55 - checksum
42 7285a491 2004-06-17 devnull 55 aa - magic
44 7285a491 2004-06-17 devnull 0000020 88 - 88 = bootable
45 7285a491 2004-06-17 devnull 03 - 3 = 2.88MB diskette
46 7285a491 2004-06-17 devnull 00 00 - load segment 0 means default 0x7C0
47 7285a491 2004-06-17 devnull 00 - system type (byte 5 of boot image)
48 7285a491 2004-06-17 devnull 00 - unused (0)
49 7285a491 2004-06-17 devnull 01 00 - 512-byte sector count for initial load
50 7285a491 2004-06-17 devnull 4e 0c 00 00 - ptr to virtual disk
51 7285a491 2004-06-17 devnull 00 00 00 00
52 7285a491 2004-06-17 devnull 0000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
53 7285a491 2004-06-17 devnull 0000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
54 7285a491 2004-06-17 devnull 0000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
55 7285a491 2004-06-17 devnull 0000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
56 7285a491 2004-06-17 devnull g% cdsector `{h2d 0c4e} | xd -b
57 7285a491 2004-06-17 devnull 1+0 records in
58 7285a491 2004-06-17 devnull 1+0 records out
59 7285a491 2004-06-17 devnull 0000000 eb 3c 00 00 00 00 00 00 00 00 00 00 02 00 00 00
60 7285a491 2004-06-17 devnull 0000010 00 00 00 00 00 00 00 00 12 00 02 00 00 00 00 00
61 7285a491 2004-06-17 devnull 0000020 00 00 00 00 00 16 1f 66 6a 00 51 50 06 53
65 7285a491 2004-06-17 devnull 0000000 eb 3c 00 00 00 00 00 00 00 00 00 00 02 00 00 00
66 7285a491 2004-06-17 devnull 0000010 00 00 00 00 00 00 00 00 12 00 02 00 00 00 00 00
67 7285a491 2004-06-17 devnull 0000020 00 00 00 00 00 16 1f 66 6a 00 51 50 06 53
71 7285a491 2004-06-17 devnull 0000000 eb 3c 90 4d 53 44 4f 53 35 2e 30 00 02 01 01 00
72 7285a491 2004-06-17 devnull 0000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00
73 7285a491 2004-06-17 devnull 0000020 00 00 00 00 00 00 29 6a 2c e0 16 4e 4f 20 4e 41
74 7285a491 2004-06-17 devnull 0000030 4d 45 20 20 20 20 46 41 54 31 32 20 20 20 fa 33
75 7285a491 2004-06-17 devnull 0000040 c0 8e d0 bc 00 7c 16 07 bb 78 00 36 c5 37 1e 56
76 7285a491 2004-06-17 devnull 0000050 16 53 bf 3e 7c b9 0b 00 fc f3 a4 06 1f c6 45 fe
77 7285a491 2004-06-17 devnull 0000060 0f 8b 0e 18 7c 88 4d f9 89 47 02 c7 07 3e 7c fb
78 7285a491 2004-06-17 devnull 0000070 cd 13 72 79 33 c0 39 06 13 7c 74 08 8b 0e 13 7c
79 7285a491 2004-06-17 devnull 0000080 89 0e 20 7c a0 10 7c f7 26 16 7c 03 06 1c 7c 13
80 7285a491 2004-06-17 devnull 0000090 16 1e 7c 03 06 0e 7c 83 d2 00 a3 50 7c 89 16 52
81 7285a491 2004-06-17 devnull 00000a0 7c a3 49 7c 89 16 4b 7c b8 20 00 f7 26 11 7c 8b
84 7285a491 2004-06-17 devnull 0000000 eb 3c 90 50 6c 61 6e 39 2e 30 30 00 02 01 01 00
85 7285a491 2004-06-17 devnull 0000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00
86 7285a491 2004-06-17 devnull 0000020 40 0b 00 00 00 00 29 13 00 00 00 43 59 4c 49 4e
87 7285a491 2004-06-17 devnull 0000030 44 52 49 43 41 4c 46 41 54 31 32 20 20 20 fa 31
88 7285a491 2004-06-17 devnull 0000040 c0 8e d0 8e d8 8e c0 bc ec 7b 89 e5 88 56 12 fb
89 7285a491 2004-06-17 devnull 0000050 be ea 7d bf 90 7d ff d7 bf 82 7d ff d7 8b 06 27
90 7285a491 2004-06-17 devnull 0000060 7c 8b 16 29 7c bb 00 7e bf 2c 7d ff d7 bb 10 00
93 7285a491 2004-06-17 devnull 0000000 eb 3c 90 50 6c 61 6e 39 2e 30 30 00 02 01 01 00
94 7285a491 2004-06-17 devnull 0000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00
95 7285a491 2004-06-17 devnull 0000020 40 0b 00 00 00 00 29 13 00 00 00 43 59 4c 49 4e
96 7285a491 2004-06-17 devnull 0000030 44 52 49 43 41 4c 46 41 54 31 32 20 20 20 fa 31
97 7285a491 2004-06-17 devnull 0000040 c0 8e d0 8e d8 8e c0 bc f8 7b 89 e5 88 56 00 fb
98 7285a491 2004-06-17 devnull 0000050 be f8 7d bf 00 7d ff d7 bf df 7c ff d7 8b 06 27
99 7285a491 2004-06-17 devnull 0000060 7c 8b 16 29 7c bb 00 7e bf 89 7c ff d7 bf fb 7c
103 7285a491 2004-06-17 devnull Cputbootvol(Cdimg *cd)
105 7285a491 2004-06-17 devnull Cputc(cd, 0x00);
106 7285a491 2004-06-17 devnull Cputs(cd, "CD001", 5);
107 7285a491 2004-06-17 devnull Cputc(cd, 0x01);
108 7285a491 2004-06-17 devnull Cputs(cd, "EL TORITO SPECIFICATION", 2+1+6+1+13);
109 7285a491 2004-06-17 devnull Crepeat(cd, 0, 2+16+16+7);
110 7285a491 2004-06-17 devnull cd->bootcatptr = Cwoffset(cd);
111 7285a491 2004-06-17 devnull Cpadblock(cd);
115 7285a491 2004-06-17 devnull Cupdatebootvol(Cdimg *cd)
117 7285a491 2004-06-17 devnull ulong o;
119 7285a491 2004-06-17 devnull o = Cwoffset(cd);
120 7285a491 2004-06-17 devnull Cwseek(cd, cd->bootcatptr);
121 7285a491 2004-06-17 devnull Cputnl(cd, cd->bootcatblock, 4);
122 7285a491 2004-06-17 devnull Cwseek(cd, o);
126 7285a491 2004-06-17 devnull Cputbootcat(Cdimg *cd)
128 7285a491 2004-06-17 devnull cd->bootcatblock = Cwoffset(cd) / Blocksize;
129 7285a491 2004-06-17 devnull Cputc(cd, 0x01);
130 7285a491 2004-06-17 devnull Cputc(cd, 0x00);
131 7285a491 2004-06-17 devnull Cputc(cd, 0x00);
132 7285a491 2004-06-17 devnull Cputc(cd, 0x00);
133 7285a491 2004-06-17 devnull Crepeat(cd, 0, 12+12);
136 7285a491 2004-06-17 devnull * either the checksum doesn't include the header word
137 7285a491 2004-06-17 devnull * or it just doesn't matter.
139 7285a491 2004-06-17 devnull Cputc(cd, 0xAA);
140 7285a491 2004-06-17 devnull Cputc(cd, 0x55);
141 7285a491 2004-06-17 devnull Cputc(cd, 0x55);
142 7285a491 2004-06-17 devnull Cputc(cd, 0xAA);
144 7285a491 2004-06-17 devnull cd->bootimageptr = Cwoffset(cd);
145 7285a491 2004-06-17 devnull Cpadblock(cd);
149 7285a491 2004-06-17 devnull Cupdatebootcat(Cdimg *cd)
151 7285a491 2004-06-17 devnull ulong o;
153 7285a491 2004-06-17 devnull if(cd->bootdirec == nil)
156 7285a491 2004-06-17 devnull o = Cwoffset(cd);
157 7285a491 2004-06-17 devnull Cwseek(cd, cd->bootimageptr);
158 7285a491 2004-06-17 devnull Cputc(cd, 0x88);
159 7285a491 2004-06-17 devnull switch(cd->bootdirec->length){
160 7285a491 2004-06-17 devnull default:
161 7285a491 2004-06-17 devnull fprint(2, "warning: boot image is not 1.44MB or 2.88MB; pretending 1.44MB\n");
162 7285a491 2004-06-17 devnull case 1440*1024:
163 7285a491 2004-06-17 devnull Cputc(cd, 0x02); /* 1.44MB disk */
165 7285a491 2004-06-17 devnull case 2880*1024:
166 7285a491 2004-06-17 devnull Cputc(cd, 0x03); /* 2.88MB disk */
169 7285a491 2004-06-17 devnull Cputnl(cd, 0, 2); /* load segment */
170 7285a491 2004-06-17 devnull Cputc(cd, 0); /* system type */
171 7285a491 2004-06-17 devnull Cputc(cd, 0); /* unused */
172 7285a491 2004-06-17 devnull Cputnl(cd, 1, 2); /* 512-byte sector count for load */
173 7285a491 2004-06-17 devnull Cputnl(cd, cd->bootdirec->block, 4); /* ptr to disk image */
174 7285a491 2004-06-17 devnull Cwseek(cd, o);
178 7285a491 2004-06-17 devnull findbootimage(Cdimg *cd, Direc *root)
180 7285a491 2004-06-17 devnull Direc *d;
182 7285a491 2004-06-17 devnull d = walkdirec(root, cd->bootimage);
183 7285a491 2004-06-17 devnull if(d == nil){
184 7285a491 2004-06-17 devnull fprint(2, "warning: did not encounter boot image\n");
188 7285a491 2004-06-17 devnull cd->bootdirec = d;
