4 * Program to add the modified U-Boot header to a binary used with
5 * the D-Link DNS-313 boot loader when booting directly from an
6 * EXT2 formatted hard drive.
8 * The DNS313 use the same header on zImage, ramdisk, rootfs.
10 * Written by Linus Walleij <linus.walleij@linaro.org>
11 * License terms: GPLv2
18 #include <sys/types.h>
23 * This is the U-Boot magic number, so the U-Boot header was used
24 * (obviously) as a template for this custom header.
26 #define IH_MAGIC 0x27051956
27 #define HEADER_SIZE 0x68
29 #define OFFSET_MAGIC 0x00
30 #define OFFSET_HCRC 0x04
31 #define OFFSET_TIME 0x08
32 #define OFFSET_SIZE 0x0c
33 #define OFFSET_LOAD 0x10
34 #define OFFSET_EP 0x14
35 #define OFFSET_DCRC 0x18
36 #define OFFSET_OS 0x1c
37 #define OFFSET_ARCH 0x1d
38 #define OFFSET_TYPE 0x1e
39 #define OFFSET_COMP 0x1f
40 #define OFFSET_NAME 0x20
42 #define OFFSET_MODEL 0x40
43 #define MODEL_LEN 0x10
44 #define OFFSET_VERSION 0x50
45 #define VERSION_LEN 0x10
46 #define OFFSET_MAC 0x60
49 static const uint32_t crc32_table
[256] = {
50 0x00000000UL
, 0x77073096UL
, 0xee0e612cUL
, 0x990951baUL
, 0x076dc419UL
,
51 0x706af48fUL
, 0xe963a535UL
, 0x9e6495a3UL
, 0x0edb8832UL
, 0x79dcb8a4UL
,
52 0xe0d5e91eUL
, 0x97d2d988UL
, 0x09b64c2bUL
, 0x7eb17cbdUL
, 0xe7b82d07UL
,
53 0x90bf1d91UL
, 0x1db71064UL
, 0x6ab020f2UL
, 0xf3b97148UL
, 0x84be41deUL
,
54 0x1adad47dUL
, 0x6ddde4ebUL
, 0xf4d4b551UL
, 0x83d385c7UL
, 0x136c9856UL
,
55 0x646ba8c0UL
, 0xfd62f97aUL
, 0x8a65c9ecUL
, 0x14015c4fUL
, 0x63066cd9UL
,
56 0xfa0f3d63UL
, 0x8d080df5UL
, 0x3b6e20c8UL
, 0x4c69105eUL
, 0xd56041e4UL
,
57 0xa2677172UL
, 0x3c03e4d1UL
, 0x4b04d447UL
, 0xd20d85fdUL
, 0xa50ab56bUL
,
58 0x35b5a8faUL
, 0x42b2986cUL
, 0xdbbbc9d6UL
, 0xacbcf940UL
, 0x32d86ce3UL
,
59 0x45df5c75UL
, 0xdcd60dcfUL
, 0xabd13d59UL
, 0x26d930acUL
, 0x51de003aUL
,
60 0xc8d75180UL
, 0xbfd06116UL
, 0x21b4f4b5UL
, 0x56b3c423UL
, 0xcfba9599UL
,
61 0xb8bda50fUL
, 0x2802b89eUL
, 0x5f058808UL
, 0xc60cd9b2UL
, 0xb10be924UL
,
62 0x2f6f7c87UL
, 0x58684c11UL
, 0xc1611dabUL
, 0xb6662d3dUL
, 0x76dc4190UL
,
63 0x01db7106UL
, 0x98d220bcUL
, 0xefd5102aUL
, 0x71b18589UL
, 0x06b6b51fUL
,
64 0x9fbfe4a5UL
, 0xe8b8d433UL
, 0x7807c9a2UL
, 0x0f00f934UL
, 0x9609a88eUL
,
65 0xe10e9818UL
, 0x7f6a0dbbUL
, 0x086d3d2dUL
, 0x91646c97UL
, 0xe6635c01UL
,
66 0x6b6b51f4UL
, 0x1c6c6162UL
, 0x856530d8UL
, 0xf262004eUL
, 0x6c0695edUL
,
67 0x1b01a57bUL
, 0x8208f4c1UL
, 0xf50fc457UL
, 0x65b0d9c6UL
, 0x12b7e950UL
,
68 0x8bbeb8eaUL
, 0xfcb9887cUL
, 0x62dd1ddfUL
, 0x15da2d49UL
, 0x8cd37cf3UL
,
69 0xfbd44c65UL
, 0x4db26158UL
, 0x3ab551ceUL
, 0xa3bc0074UL
, 0xd4bb30e2UL
,
70 0x4adfa541UL
, 0x3dd895d7UL
, 0xa4d1c46dUL
, 0xd3d6f4fbUL
, 0x4369e96aUL
,
71 0x346ed9fcUL
, 0xad678846UL
, 0xda60b8d0UL
, 0x44042d73UL
, 0x33031de5UL
,
72 0xaa0a4c5fUL
, 0xdd0d7cc9UL
, 0x5005713cUL
, 0x270241aaUL
, 0xbe0b1010UL
,
73 0xc90c2086UL
, 0x5768b525UL
, 0x206f85b3UL
, 0xb966d409UL
, 0xce61e49fUL
,
74 0x5edef90eUL
, 0x29d9c998UL
, 0xb0d09822UL
, 0xc7d7a8b4UL
, 0x59b33d17UL
,
75 0x2eb40d81UL
, 0xb7bd5c3bUL
, 0xc0ba6cadUL
, 0xedb88320UL
, 0x9abfb3b6UL
,
76 0x03b6e20cUL
, 0x74b1d29aUL
, 0xead54739UL
, 0x9dd277afUL
, 0x04db2615UL
,
77 0x73dc1683UL
, 0xe3630b12UL
, 0x94643b84UL
, 0x0d6d6a3eUL
, 0x7a6a5aa8UL
,
78 0xe40ecf0bUL
, 0x9309ff9dUL
, 0x0a00ae27UL
, 0x7d079eb1UL
, 0xf00f9344UL
,
79 0x8708a3d2UL
, 0x1e01f268UL
, 0x6906c2feUL
, 0xf762575dUL
, 0x806567cbUL
,
80 0x196c3671UL
, 0x6e6b06e7UL
, 0xfed41b76UL
, 0x89d32be0UL
, 0x10da7a5aUL
,
81 0x67dd4accUL
, 0xf9b9df6fUL
, 0x8ebeeff9UL
, 0x17b7be43UL
, 0x60b08ed5UL
,
82 0xd6d6a3e8UL
, 0xa1d1937eUL
, 0x38d8c2c4UL
, 0x4fdff252UL
, 0xd1bb67f1UL
,
83 0xa6bc5767UL
, 0x3fb506ddUL
, 0x48b2364bUL
, 0xd80d2bdaUL
, 0xaf0a1b4cUL
,
84 0x36034af6UL
, 0x41047a60UL
, 0xdf60efc3UL
, 0xa867df55UL
, 0x316e8eefUL
,
85 0x4669be79UL
, 0xcb61b38cUL
, 0xbc66831aUL
, 0x256fd2a0UL
, 0x5268e236UL
,
86 0xcc0c7795UL
, 0xbb0b4703UL
, 0x220216b9UL
, 0x5505262fUL
, 0xc5ba3bbeUL
,
87 0xb2bd0b28UL
, 0x2bb45a92UL
, 0x5cb36a04UL
, 0xc2d7ffa7UL
, 0xb5d0cf31UL
,
88 0x2cd99e8bUL
, 0x5bdeae1dUL
, 0x9b64c2b0UL
, 0xec63f226UL
, 0x756aa39cUL
,
89 0x026d930aUL
, 0x9c0906a9UL
, 0xeb0e363fUL
, 0x72076785UL
, 0x05005713UL
,
90 0x95bf4a82UL
, 0xe2b87a14UL
, 0x7bb12baeUL
, 0x0cb61b38UL
, 0x92d28e9bUL
,
91 0xe5d5be0dUL
, 0x7cdcefb7UL
, 0x0bdbdf21UL
, 0x86d3d2d4UL
, 0xf1d4e242UL
,
92 0x68ddb3f8UL
, 0x1fda836eUL
, 0x81be16cdUL
, 0xf6b9265bUL
, 0x6fb077e1UL
,
93 0x18b74777UL
, 0x88085ae6UL
, 0xff0f6a70UL
, 0x66063bcaUL
, 0x11010b5cUL
,
94 0x8f659effUL
, 0xf862ae69UL
, 0x616bffd3UL
, 0x166ccf45UL
, 0xa00ae278UL
,
95 0xd70dd2eeUL
, 0x4e048354UL
, 0x3903b3c2UL
, 0xa7672661UL
, 0xd06016f7UL
,
96 0x4969474dUL
, 0x3e6e77dbUL
, 0xaed16a4aUL
, 0xd9d65adcUL
, 0x40df0b66UL
,
97 0x37d83bf0UL
, 0xa9bcae53UL
, 0xdebb9ec5UL
, 0x47b2cf7fUL
, 0x30b5ffe9UL
,
98 0xbdbdf21cUL
, 0xcabac28aUL
, 0x53b39330UL
, 0x24b4a3a6UL
, 0xbad03605UL
,
99 0xcdd70693UL
, 0x54de5729UL
, 0x23d967bfUL
, 0xb3667a2eUL
, 0xc4614ab8UL
,
100 0x5d681b02UL
, 0x2a6f2b94UL
, 0xb40bbe37UL
, 0xc30c8ea1UL
, 0x5a05df1bUL
,
104 static uint32_t crc32(uint32_t crc
,
108 const uint8_t *buf
= data
;
110 crc
= crc
^ 0xffffffffUL
;
112 crc
= crc32_table
[((int)crc
^ (*buf
++)) & 0xff] ^ (crc
>> 8);
114 return crc
^ 0xffffffffUL
;
117 static void be_wr(char *buf
, uint32_t val
)
119 buf
[0] = (val
>> 24) & 0xFFU
;
120 buf
[1] = (val
>> 16) & 0xFFU
;
121 buf
[2] = (val
>> 8) & 0xFFU
;
122 buf
[3] = val
& 0xFFU
;
125 int main(int argc
, char **argv
)
140 printf("Too few arguments.\n");
141 printf("%s <infile> <outfile>\n", argv
[0]);
147 ret
= stat(pathin
, &sb
);
151 filesize
= sb
.st_size
;
152 printf("INFILE: %s, size: %08x bytes\n", pathin
, filesize
);
153 /* File + extended header size */
154 bufsize
= filesize
+ HEADER_SIZE
;
156 printf("Allocate %08zx bytes\n", bufsize
);
157 buffer
= malloc(bufsize
);
159 printf("OOM: could not allocate buffer\n");
163 memset(buffer
, 0x00, bufsize
);
165 /* Read file to buffer */
166 fdin
= open(pathin
, O_RDONLY
);
168 printf("ERROR: could not open input file\n");
172 bytes
= read(fdin
, buffer
+ HEADER_SIZE
, filesize
);
173 if (bytes
< filesize
) {
174 printf("ERROR: could not read entire file\n");
181 be_wr(buffer
+ OFFSET_MAGIC
, IH_MAGIC
);
183 /* FIXME: use actual time */
184 be_wr(buffer
+ OFFSET_TIME
, 0x4c06738c);
185 be_wr(buffer
+ OFFSET_SIZE
, filesize
);
187 /* Load address & entry point */
188 be_wr(buffer
+ OFFSET_LOAD
, 0x00008000);
189 be_wr(buffer
+ OFFSET_EP
, 0x00008000);
191 buffer
[OFFSET_OS
] = 0x05; /* Linux */
192 buffer
[OFFSET_ARCH
] = 0x02; /* ARM */
193 buffer
[OFFSET_TYPE
] = 0x02; /* OS kernel image */
194 buffer
[OFFSET_COMP
] = 0x01; /* gzip */
196 /* The vendor firmware just hardcodes this */
197 strncpy(buffer
+ OFFSET_NAME
, "kernel.img", NAME_LEN
);
198 buffer
[OFFSET_NAME
+ NAME_LEN
- 1] = '\0';
199 strncpy(buffer
+ OFFSET_MODEL
, "dns-313v3", MODEL_LEN
);
200 buffer
[OFFSET_MODEL
+ MODEL_LEN
- 1] = '\0';
201 strncpy(buffer
+ OFFSET_VERSION
, "2.01b04", VERSION_LEN
);
202 buffer
[OFFSET_VERSION
+ VERSION_LEN
- 1] = '\0';
203 /* Just some MAC address from the example */
204 buffer
[OFFSET_MAC
] = 0x00;
205 buffer
[OFFSET_MAC
+ 1] = 0x80;
206 buffer
[OFFSET_MAC
+ 2] = 0xc8;
207 buffer
[OFFSET_MAC
+ 3] = 0x16;
208 buffer
[OFFSET_MAC
+ 4] = 0x81;
209 buffer
[OFFSET_MAC
+ 5] = 0x68;
211 /* Checksum payload */
212 sum
= crc32(0, buffer
+ HEADER_SIZE
, filesize
);
213 be_wr(buffer
+ OFFSET_DCRC
, sum
);
214 printf("data checksum: 0x%08x\n", sum
);
216 /* Checksum header, then write that into the header checksum */
217 sum
= crc32(0, buffer
, HEADER_SIZE
);
218 be_wr(buffer
+ OFFSET_HCRC
, sum
);
219 printf("header checksum: 0x%08x\n", sum
);
221 printf("OUTFILE: %s, size: %08zx bytes\n", pathout
, bufsize
);
222 fdout
= open(pathout
, O_RDWR
|O_CREAT
|O_TRUNC
,S_IRWXU
|S_IRGRP
);
224 printf("ERROR: could not open output file\n");
227 bytes
= write(fdout
, buffer
, bufsize
);
228 if (bytes
< bufsize
) {
229 printf("ERROR: could not write complete output file\n");