1 /*
2 * $NetBSD: cd9660_eltorito.h,v 1.6 2017/01/24 11:22:43 nonaka Exp $
3 */
4
5 /*
6 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
7 *
8 * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
9 * Perez-Rathke and Ram Vedam. All rights reserved.
10 *
11 * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
12 * Alan Perez-Rathke and Ram Vedam.
13 *
14 * Redistribution and use in source and binary forms, with or
15 * without modification, are permitted provided that the following
16 * conditions are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
25 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
29 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
32 * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
33 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
34 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
36 * OF SUCH DAMAGE.
37 */
38
39 #ifndef _CD9660_ELTORITO_H_
40 #define _CD9660_ELTORITO_H_
41
42 #include <sys/types.h>
43 #include <sys/queue.h>
44
45 /* Boot defines */
46 #define ET_ID "EL TORITO SPECIFICATION"
47 #define ET_SYS_X86 0
48 #define ET_SYS_PPC 1
49 #define ET_SYS_MAC 2
50 #define ET_SYS_EFI 0xef /* Platform ID at section header entry */
51
52 #define ET_BOOT_ENTRY_SIZE 0x20
53
54 #define ET_BOOTABLE 0x88
55 #define ET_NOT_BOOTABLE 0
56
57 #define ET_MEDIA_NOEM 0
58 #define ET_MEDIA_12FDD 1
59 #define ET_MEDIA_144FDD 2
60 #define ET_MEDIA_288FDD 3
61 #define ET_MEDIA_HDD 4
62
63 #define ET_INDICATOR_HEADERMORE 0x90
64 #define ET_INDICATOR_HEADERLAST 0x91
65 #define ET_INDICATOR_EXTENSION 0x44
66
67 /* Boot Structures */
68
69 #define ISODCL(from, to) (to - from + 1)
70
71 typedef struct _boot_volume_descriptor {
72 uchar_t boot_record_indicator [ISODCL(0x00, 0x00)];
73 uchar_t identifier [ISODCL(0x01, 0x05)];
74 uchar_t version [ISODCL(0x06, 0x06)];
75 uchar_t boot_system_identifier [ISODCL(0x07, 0x26)];
76 uchar_t unused1 [ISODCL(0x27, 0x46)];
77 uchar_t boot_catalog_pointer [ISODCL(0x47, 0x4A)];
78 uchar_t unused2 [ISODCL(0x4B, 0x7FF)];
79 } boot_volume_descriptor;
80
81 typedef struct _boot_catalog_validation_entry {
82 uchar_t header_id [ISODCL(0x00, 0x00)];
83 uchar_t platform_id [ISODCL(0x01, 0x01)];
84 uchar_t reserved1 [ISODCL(0x02, 0x03)];
85 uchar_t manufacturer [ISODCL(0x04, 0x1B)];
86 uchar_t checksum [ISODCL(0x1C, 0x1D)];
87 uchar_t key [ISODCL(0x1E, 0x1F)];
88 } boot_catalog_validation_entry;
89
90 typedef struct _boot_catalog_initial_entry {
91 uchar_t boot_indicator [ISODCL(0x00, 0x00)];
92 uchar_t media_type [ISODCL(0x01, 0x01)];
93 uchar_t load_segment [ISODCL(0x02, 0x03)];
94 uchar_t system_type [ISODCL(0x04, 0x04)];
95 uchar_t unused_1 [ISODCL(0x05, 0x05)];
96 uchar_t sector_count [ISODCL(0x06, 0x07)];
97 uchar_t load_rba [ISODCL(0x08, 0x0B)];
98 uchar_t unused_2 [ISODCL(0x0C, 0x1F)];
99 } boot_catalog_initial_entry;
100
101 #define ET_SECTION_HEADER_MORE 0x90
102 #define ET_SECTION_HEADER_LAST 0x91
103
104 typedef struct _boot_catalog_section_header {
105 uchar_t header_indicator [ISODCL(0x00, 0x00)];
106 uchar_t platform_id [ISODCL(0x01, 0x01)];
107 uchar_t num_section_entries [ISODCL(0x02, 0x03)];
108 uchar_t id_string [ISODCL(0x04, 0x1F)];
109 } boot_catalog_section_header;
110
111 typedef struct _boot_catalog_section_entry {
112 uchar_t boot_indicator [ISODCL(0x00, 0x00)];
113 uchar_t media_type [ISODCL(0x01, 0x01)];
114 uchar_t load_segment [ISODCL(0x02, 0x03)];
115 uchar_t system_type [ISODCL(0x04, 0x04)];
116 uchar_t unused_1 [ISODCL(0x05, 0x05)];
117 uchar_t sector_count [ISODCL(0x06, 0x07)];
118 uchar_t load_rba [ISODCL(0x08, 0x0B)];
119 uchar_t selection_criteria [ISODCL(0x0C, 0x0C)];
120 uchar_t vendor_criteria [ISODCL(0x0D, 0x1F)];
121 } boot_catalog_section_entry;
122
123 typedef struct _boot_catalog_section_entry_extension {
124 uchar_t extension_indicator [ISODCL(0x00, 0x00)];
125 uchar_t flags [ISODCL(0x01, 0x01)];
126 uchar_t vendor_criteria [ISODCL(0x02, 0x1F)];
127 } boot_catalog_section_entry_extension;
128
129 #define ET_ENTRY_VE 1
130 #define ET_ENTRY_IE 2
131 #define ET_ENTRY_SH 3
132 #define ET_ENTRY_SE 4
133 #define ET_ENTRY_EX 5
134
135 struct boot_catalog_entry {
136 char entry_type;
137 union {
138 boot_catalog_validation_entry VE;
139 boot_catalog_initial_entry IE;
140 boot_catalog_section_header SH;
141 boot_catalog_section_entry SE;
142 boot_catalog_section_entry_extension EX;
143 } entry_data;
144
145 LIST_ENTRY(boot_catalog_entry) ll_struct;
146 };
147
148 /* Temporary structure */
149 struct cd9660_boot_image {
150 char *filename;
151 int size;
152 int sector; /* copied to LoadRBA */
153 int num_sectors;
154 unsigned int loadSegment;
155 uchar_t targetMode;
156 uchar_t system;
157 uchar_t bootable;
158 uchar_t platform_id; /* for section header entry */
159 /*
160 * If the boot image exists in the filesystem
161 * already, this is a pointer to that node. For the sake
162 * of simplicity in future versions, this pointer is only
163 * to the node in the primary volume. This SHOULD be done
164 * via a hashtable lookup.
165 */
166 struct _cd9660node *boot_image_node;
167 TAILQ_ENTRY(cd9660_boot_image) image_list;
168 int serialno;
169 };
170
171 void cd9660_721(uint16_t, unsigned char *);
172
173 static __inline uint16_t
isonum_721(const unsigned char * p)174 isonum_721(const unsigned char *p)
175 {
176
177 return (p[0] | p[1] << 8);
178 }
179
180 static __inline uint32_t
isonum_731(const unsigned char * p)181 isonum_731(const unsigned char *p)
182 {
183
184 return (p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24);
185 }
186
187 #endif /* _CD9660_ELTORITO_H_ */
188