123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189 |
- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- #include <libsec.h>
- #include "iso9660.h"
- /* FreeBSD 4.5 installation CD for reference
- g% cdsector 17 | xd -b
- 1+0 records in
- 1+0 records out
- 0000000 00 - volume descriptor type (0)
- 43 44 30 30 31 - "CD001"
- 01 - volume descriptor version (1)
- 45 4c 20 54 4f 52 49 54 4f
- 0000010 20 53 50 45 43 49 46 49 43 41 54 49 4f 4e 00 00
- 0000020 00 00 00 00 00 00 00 - 7-39 boot system identifier
- "EL TORITO SPECIFICATION"
- 00 00 00 00 00 00 00 00 00
- 0000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 0000040 00 00 00 00 00 00 00 - 39-71 boot identifier
- boot system use:
- absolute pointer to the boot catalog??
- 4d 0c 00 00 00 00 00 00 00
- 0000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 0000580 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 0000590 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 00005a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- g% cdsector 3149 | xd -b # 0x0c4d
- 1+0 records in
- 1+0 records out
- 0000000 01 - header (1)
- 00 - platform id (0 = 0x86)
- 00 00 - reserved 0
- 00 00 00 00 00 00 00 00 00 00 00 00
- 0000010 00 00 00 00 00 00 00 00 00 00 00 00 - id string
- aa 55 - checksum
- 55 aa - magic
- 0000020 88 - 88 = bootable
- 03 - 3 = 2.88MB diskette
- 00 00 - load segment 0 means default 0x7C0
- 00 - system type (byte 5 of boot image)
- 00 - unused (0)
- 01 00 - 512-byte sector count for initial load
- 4e 0c 00 00 - ptr to virtual disk
- 00 00 00 00
- 0000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 0000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 0000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- 0000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
- g% cdsector `{h2d 0c4e} | xd -b
- 1+0 records in
- 1+0 records out
- 0000000 eb 3c 00 00 00 00 00 00 00 00 00 00 02 00 00 00
- 0000010 00 00 00 00 00 00 00 00 12 00 02 00 00 00 00 00
- 0000020 00 00 00 00 00 16 1f 66 6a 00 51 50 06 53
- 31 c0
- FREEBSD
- 0000000 eb 3c 00 00 00 00 00 00 00 00 00 00 02 00 00 00
- 0000010 00 00 00 00 00 00 00 00 12 00 02 00 00 00 00 00
- 0000020 00 00 00 00 00 16 1f 66 6a 00 51 50 06 53
- 31 c0
- DOS 5
- 0000000 eb 3c 90 4d 53 44 4f 53 35 2e 30 00 02 01 01 00
- 0000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00
- 0000020 00 00 00 00 00 00 29 6a 2c e0 16 4e 4f 20 4e 41
- 0000030 4d 45 20 20 20 20 46 41 54 31 32 20 20 20 fa 33
- 0000040 c0 8e d0 bc 00 7c 16 07 bb 78 00 36 c5 37 1e 56
- 0000050 16 53 bf 3e 7c b9 0b 00 fc f3 a4 06 1f c6 45 fe
- 0000060 0f 8b 0e 18 7c 88 4d f9 89 47 02 c7 07 3e 7c fb
- 0000070 cd 13 72 79 33 c0 39 06 13 7c 74 08 8b 0e 13 7c
- 0000080 89 0e 20 7c a0 10 7c f7 26 16 7c 03 06 1c 7c 13
- 0000090 16 1e 7c 03 06 0e 7c 83 d2 00 a3 50 7c 89 16 52
- 00000a0 7c a3 49 7c 89 16 4b 7c b8 20 00 f7 26 11 7c 8b
- NDISK
- 0000000 eb 3c 90 50 6c 61 6e 39 2e 30 30 00 02 01 01 00
- 0000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00
- 0000020 40 0b 00 00 00 00 29 13 00 00 00 43 59 4c 49 4e
- 0000030 44 52 49 43 41 4c 46 41 54 31 32 20 20 20 fa 31
- 0000040 c0 8e d0 8e d8 8e c0 bc ec 7b 89 e5 88 56 12 fb
- 0000050 be ea 7d bf 90 7d ff d7 bf 82 7d ff d7 8b 06 27
- 0000060 7c 8b 16 29 7c bb 00 7e bf 2c 7d ff d7 bb 10 00
- PBSDISK
- 0000000 eb 3c 90 50 6c 61 6e 39 2e 30 30 00 02 01 01 00
- 0000010 02 e0 00 40 0b f0 09 00 12 00 02 00 00 00 00 00
- 0000020 40 0b 00 00 00 00 29 13 00 00 00 43 59 4c 49 4e
- 0000030 44 52 49 43 41 4c 46 41 54 31 32 20 20 20 fa 31
- 0000040 c0 8e d0 8e d8 8e c0 bc f8 7b 89 e5 88 56 00 fb
- 0000050 be f8 7d bf 00 7d ff d7 bf df 7c ff d7 8b 06 27
- 0000060 7c 8b 16 29 7c bb 00 7e bf 89 7c ff d7 bf fb 7c
- */
- void
- Cputbootvol(Cdimg *cd)
- {
- Cputc(cd, 0x00);
- Cputs(cd, "CD001", 5);
- Cputc(cd, 0x01);
- Cputs(cd, "EL TORITO SPECIFICATION", 2+1+6+1+13);
- Crepeat(cd, 0, 2+16+16+7);
- cd->bootcatptr = Cwoffset(cd);
- Cpadblock(cd);
- }
- void
- Cupdatebootvol(Cdimg *cd)
- {
- uvlong o;
- o = Cwoffset(cd);
- Cwseek(cd, cd->bootcatptr);
- Cputnl(cd, cd->bootcatblock, 4);
- Cwseek(cd, o);
- }
- void
- Cputbootcat(Cdimg *cd)
- {
- cd->bootcatblock = Cwoffset(cd) / Blocksize;
- Cputc(cd, 0x01);
- Cputc(cd, 0x00);
- Cputc(cd, 0x00);
- Cputc(cd, 0x00);
- Crepeat(cd, 0, 12+12);
- /*
- * either the checksum doesn't include the header word
- * or it just doesn't matter.
- */
- Cputc(cd, 0xAA);
- Cputc(cd, 0x55);
- Cputc(cd, 0x55);
- Cputc(cd, 0xAA);
- cd->bootimageptr = Cwoffset(cd);
- Cpadblock(cd);
- }
- void
- Cupdatebootcat(Cdimg *cd)
- {
- uvlong o;
- if(cd->bootdirec == nil)
- return;
- o = Cwoffset(cd);
- Cwseek(cd, cd->bootimageptr);
- Cputc(cd, 0x88);
- switch(cd->bootdirec->length){
- default:
- fprint(2, "warning: boot image is not 1.44MB or 2.88MB; pretending 1.44MB\n");
- case 1440*1024:
- Cputc(cd, 0x02); /* 1.44MB disk */
- break;
- case 2880*1024:
- Cputc(cd, 0x03); /* 2.88MB disk */
- break;
- }
- Cputnl(cd, 0, 2); /* load segment */
- Cputc(cd, 0); /* system type */
- Cputc(cd, 0); /* unused */
- Cputnl(cd, 1, 2); /* 512-byte sector count for load */
- Cputnl(cd, cd->bootdirec->block, 4); /* ptr to disk image */
- Cwseek(cd, o);
- }
- void
- findbootimage(Cdimg *cd, Direc *root)
- {
- Direc *d;
- d = walkdirec(root, cd->bootimage);
- if(d == nil){
- fprint(2, "warning: did not encounter boot image\n");
- return;
- }
- cd->bootdirec = d;
- }
|