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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright (C) 1997 Martin Mares
5 * Copyright (C) 2007 H. Peter Anvin
6 */
7
8/*
9 * This file builds a disk-image from three different files:
10 *
11 * - setup: 8086 machine code, sets up system parm
12 * - system: 80386 code for actual system
13 * - zoffset.h: header with ZO_* defines
14 *
15 * It does some checking that all files are of the correct type, and writes
16 * the result to the specified destination, removing headers and padding to
17 * the right amount. It also writes some system data to stdout.
18 */
19
20/*
21 * Changes by tytso to allow root device specification
22 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
23 * Cross compiling fixes by Gertjan van Wingerde, July 1996
24 * Rewritten by Martin Mares, April 1997
25 * Substantially overhauled by H. Peter Anvin, April 2007
26 */
27
28#include <stdio.h>
29#include <string.h>
30#include <stdlib.h>
31#include <stdarg.h>
32#include <sys/types.h>
33#include <sys/stat.h>
34#include <unistd.h>
35#include <fcntl.h>
36#include <sys/mman.h>
37#include <tools/le_byteshift.h>
38
39typedef unsigned char u8;
40typedef unsigned short u16;
41typedef unsigned int u32;
42
43/* Minimal number of setup sectors */
44#define SETUP_SECT_MIN 5
45#define SETUP_SECT_MAX 64
46
47/* This must be large enough to hold the entire setup */
48u8 buf[SETUP_SECT_MAX*512];
49
50static unsigned long _edata;
51
52/*----------------------------------------------------------------------*/
53
54static const u32 crctab32[] = {
55 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
56 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
57 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
58 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
59 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
60 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
61 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
62 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
63 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
64 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
65 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
66 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
67 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
68 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
69 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
70 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
71 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
72 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
73 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
74 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
75 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
76 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
77 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
78 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
79 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
80 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
81 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
82 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
83 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
84 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
85 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
86 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
87 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
88 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
89 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
90 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
91 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
92 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
93 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
94 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
95 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
96 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
97 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
98 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
99 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
100 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
101 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
102 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
103 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
104 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
105 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
106 0x2d02ef8d
107};
108
109static u32 partial_crc32_one(u8 c, u32 crc)
110{
111 return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
112}
113
114static u32 partial_crc32(const u8 *s, int len, u32 crc)
115{
116 while (len--)
117 crc = partial_crc32_one(*s++, crc);
118 return crc;
119}
120
121static void die(const char * str, ...)
122{
123 va_list args;
124 va_start(args, str);
125 vfprintf(stderr, str, args);
126 va_end(args);
127 fputc('\n', stderr);
128 exit(1);
129}
130
131static void usage(void)
132{
133 die("Usage: build setup system zoffset.h image");
134}
135
136/*
137 * Parse zoffset.h and find the entry points. We could just #include zoffset.h
138 * but that would mean tools/build would have to be rebuilt every time. It's
139 * not as if parsing it is hard...
140 */
141#define PARSE_ZOFS(p, sym) do { \
142 if (!strncmp(p, "#define ZO_" #sym " ", 11+sizeof(#sym))) \
143 sym = strtoul(p + 11 + sizeof(#sym), NULL, 16); \
144} while (0)
145
146static void parse_zoffset(char *fname)
147{
148 FILE *file;
149 char *p;
150 int c;
151
152 file = fopen(fname, "r");
153 if (!file)
154 die("Unable to open `%s': %m", fname);
155 c = fread(buf, 1, sizeof(buf) - 1, file);
156 if (ferror(file))
157 die("read-error on `zoffset.h'");
158 fclose(file);
159 buf[c] = 0;
160
161 p = (char *)buf;
162
163 while (p && *p) {
164 PARSE_ZOFS(p, _edata);
165
166 p = strchr(p, '\n');
167 while (p && (*p == '\r' || *p == '\n'))
168 p++;
169 }
170}
171
172int main(int argc, char ** argv)
173{
174 unsigned int i, sz, setup_sectors;
175 int c;
176 struct stat sb;
177 FILE *file, *dest;
178 int fd;
179 void *kernel;
180 u32 crc = 0xffffffffUL;
181
182 if (argc != 5)
183 usage();
184 parse_zoffset(argv[3]);
185
186 dest = fopen(argv[4], "w");
187 if (!dest)
188 die("Unable to write `%s': %m", argv[4]);
189
190 /* Copy the setup code */
191 file = fopen(argv[1], "r");
192 if (!file)
193 die("Unable to open `%s': %m", argv[1]);
194 c = fread(buf, 1, sizeof(buf), file);
195 if (ferror(file))
196 die("read-error on `setup'");
197 if (c < 1024)
198 die("The setup must be at least 1024 bytes");
199 if (get_unaligned_le16(&buf[510]) != 0xAA55)
200 die("Boot block hasn't got boot flag (0xAA55)");
201 fclose(file);
202
203 /* Pad unused space with zeros */
204 setup_sectors = (c + 4095) / 4096;
205 setup_sectors *= 8;
206 if (setup_sectors < SETUP_SECT_MIN)
207 setup_sectors = SETUP_SECT_MIN;
208 i = setup_sectors*512;
209 memset(buf+c, 0, i-c);
210
211 /* Open and stat the kernel file */
212 fd = open(argv[2], O_RDONLY);
213 if (fd < 0)
214 die("Unable to open `%s': %m", argv[2]);
215 if (fstat(fd, &sb))
216 die("Unable to stat `%s': %m", argv[2]);
217 if (_edata != sb.st_size)
218 die("Unexpected file size `%s': %u != %u", argv[2], _edata,
219 sb.st_size);
220 sz = _edata - 4;
221 kernel = mmap(NULL, sz, PROT_READ, MAP_SHARED, fd, 0);
222 if (kernel == MAP_FAILED)
223 die("Unable to mmap '%s': %m", argv[2]);
224
225 crc = partial_crc32(buf, i, crc);
226 if (fwrite(buf, 1, i, dest) != i)
227 die("Writing setup failed");
228
229 /* Copy the kernel code */
230 crc = partial_crc32(kernel, sz, crc);
231 if (fwrite(kernel, 1, sz, dest) != sz)
232 die("Writing kernel failed");
233
234 /* Write the CRC */
235 put_unaligned_le32(crc, buf);
236 if (fwrite(buf, 1, 4, dest) != 4)
237 die("Writing CRC failed");
238
239 /* Catch any delayed write failures */
240 if (fclose(dest))
241 die("Writing image failed");
242
243 close(fd);
244
245 /* Everything is OK */
246 return 0;
247}
1/*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 1997 Martin Mares
4 * Copyright (C) 2007 H. Peter Anvin
5 */
6
7/*
8 * This file builds a disk-image from three different files:
9 *
10 * - setup: 8086 machine code, sets up system parm
11 * - system: 80386 code for actual system
12 * - zoffset.h: header with ZO_* defines
13 *
14 * It does some checking that all files are of the correct type, and writes
15 * the result to the specified destination, removing headers and padding to
16 * the right amount. It also writes some system data to stdout.
17 */
18
19/*
20 * Changes by tytso to allow root device specification
21 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
22 * Cross compiling fixes by Gertjan van Wingerde, July 1996
23 * Rewritten by Martin Mares, April 1997
24 * Substantially overhauled by H. Peter Anvin, April 2007
25 */
26
27#include <stdio.h>
28#include <string.h>
29#include <stdlib.h>
30#include <stdarg.h>
31#include <sys/types.h>
32#include <sys/stat.h>
33#include <unistd.h>
34#include <fcntl.h>
35#include <sys/mman.h>
36#include <tools/le_byteshift.h>
37
38typedef unsigned char u8;
39typedef unsigned short u16;
40typedef unsigned int u32;
41
42#define DEFAULT_MAJOR_ROOT 0
43#define DEFAULT_MINOR_ROOT 0
44#define DEFAULT_ROOT_DEV (DEFAULT_MAJOR_ROOT << 8 | DEFAULT_MINOR_ROOT)
45
46/* Minimal number of setup sectors */
47#define SETUP_SECT_MIN 5
48#define SETUP_SECT_MAX 64
49
50/* This must be large enough to hold the entire setup */
51u8 buf[SETUP_SECT_MAX*512];
52
53#define PECOFF_RELOC_RESERVE 0x20
54
55unsigned long efi32_stub_entry;
56unsigned long efi64_stub_entry;
57unsigned long efi_pe_entry;
58unsigned long startup_64;
59
60/*----------------------------------------------------------------------*/
61
62static const u32 crctab32[] = {
63 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
64 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
65 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
66 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
67 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
68 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
69 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
70 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
71 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
72 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
73 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
74 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
75 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
76 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
77 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
78 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
79 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
80 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
81 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
82 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
83 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
84 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
85 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
86 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
87 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
88 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
89 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
90 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
91 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
92 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
93 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
94 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
95 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
96 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
97 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
98 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
99 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
100 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
101 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
102 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
103 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
104 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
105 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
106 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
107 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
108 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
109 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
110 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
111 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
112 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
113 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
114 0x2d02ef8d
115};
116
117static u32 partial_crc32_one(u8 c, u32 crc)
118{
119 return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
120}
121
122static u32 partial_crc32(const u8 *s, int len, u32 crc)
123{
124 while (len--)
125 crc = partial_crc32_one(*s++, crc);
126 return crc;
127}
128
129static void die(const char * str, ...)
130{
131 va_list args;
132 va_start(args, str);
133 vfprintf(stderr, str, args);
134 fputc('\n', stderr);
135 exit(1);
136}
137
138static void usage(void)
139{
140 die("Usage: build setup system zoffset.h image");
141}
142
143#ifdef CONFIG_EFI_STUB
144
145static void update_pecoff_section_header_fields(char *section_name, u32 vma, u32 size, u32 datasz, u32 offset)
146{
147 unsigned int pe_header;
148 unsigned short num_sections;
149 u8 *section;
150
151 pe_header = get_unaligned_le32(&buf[0x3c]);
152 num_sections = get_unaligned_le16(&buf[pe_header + 6]);
153
154#ifdef CONFIG_X86_32
155 section = &buf[pe_header + 0xa8];
156#else
157 section = &buf[pe_header + 0xb8];
158#endif
159
160 while (num_sections > 0) {
161 if (strncmp((char*)section, section_name, 8) == 0) {
162 /* section header size field */
163 put_unaligned_le32(size, section + 0x8);
164
165 /* section header vma field */
166 put_unaligned_le32(vma, section + 0xc);
167
168 /* section header 'size of initialised data' field */
169 put_unaligned_le32(datasz, section + 0x10);
170
171 /* section header 'file offset' field */
172 put_unaligned_le32(offset, section + 0x14);
173
174 break;
175 }
176 section += 0x28;
177 num_sections--;
178 }
179}
180
181static void update_pecoff_section_header(char *section_name, u32 offset, u32 size)
182{
183 update_pecoff_section_header_fields(section_name, offset, size, size, offset);
184}
185
186static void update_pecoff_setup_and_reloc(unsigned int size)
187{
188 u32 setup_offset = 0x200;
189 u32 reloc_offset = size - PECOFF_RELOC_RESERVE;
190 u32 setup_size = reloc_offset - setup_offset;
191
192 update_pecoff_section_header(".setup", setup_offset, setup_size);
193 update_pecoff_section_header(".reloc", reloc_offset, PECOFF_RELOC_RESERVE);
194
195 /*
196 * Modify .reloc section contents with a single entry. The
197 * relocation is applied to offset 10 of the relocation section.
198 */
199 put_unaligned_le32(reloc_offset + 10, &buf[reloc_offset]);
200 put_unaligned_le32(10, &buf[reloc_offset + 4]);
201}
202
203static void update_pecoff_text(unsigned int text_start, unsigned int file_sz)
204{
205 unsigned int pe_header;
206 unsigned int text_sz = file_sz - text_start;
207
208 pe_header = get_unaligned_le32(&buf[0x3c]);
209
210 /*
211 * Size of code: Subtract the size of the first sector (512 bytes)
212 * which includes the header.
213 */
214 put_unaligned_le32(file_sz - 512, &buf[pe_header + 0x1c]);
215
216 /*
217 * Address of entry point for PE/COFF executable
218 */
219 put_unaligned_le32(text_start + efi_pe_entry, &buf[pe_header + 0x28]);
220
221 update_pecoff_section_header(".text", text_start, text_sz);
222}
223
224static void update_pecoff_bss(unsigned int file_sz, unsigned int init_sz)
225{
226 unsigned int pe_header;
227 unsigned int bss_sz = init_sz - file_sz;
228
229 pe_header = get_unaligned_le32(&buf[0x3c]);
230
231 /* Size of uninitialized data */
232 put_unaligned_le32(bss_sz, &buf[pe_header + 0x24]);
233
234 /* Size of image */
235 put_unaligned_le32(init_sz, &buf[pe_header + 0x50]);
236
237 update_pecoff_section_header_fields(".bss", file_sz, bss_sz, 0, 0);
238}
239
240static int reserve_pecoff_reloc_section(int c)
241{
242 /* Reserve 0x20 bytes for .reloc section */
243 memset(buf+c, 0, PECOFF_RELOC_RESERVE);
244 return PECOFF_RELOC_RESERVE;
245}
246
247static void efi_stub_defaults(void)
248{
249 /* Defaults for old kernel */
250#ifdef CONFIG_X86_32
251 efi_pe_entry = 0x10;
252#else
253 efi_pe_entry = 0x210;
254 startup_64 = 0x200;
255#endif
256}
257
258static void efi_stub_entry_update(void)
259{
260 unsigned long addr = efi32_stub_entry;
261
262#ifdef CONFIG_X86_64
263 /* Yes, this is really how we defined it :( */
264 addr = efi64_stub_entry - 0x200;
265#endif
266
267#ifdef CONFIG_EFI_MIXED
268 if (efi32_stub_entry != addr)
269 die("32-bit and 64-bit EFI entry points do not match\n");
270#endif
271 put_unaligned_le32(addr, &buf[0x264]);
272}
273
274#else
275
276static inline void update_pecoff_setup_and_reloc(unsigned int size) {}
277static inline void update_pecoff_text(unsigned int text_start,
278 unsigned int file_sz) {}
279static inline void update_pecoff_bss(unsigned int file_sz,
280 unsigned int init_sz) {}
281static inline void efi_stub_defaults(void) {}
282static inline void efi_stub_entry_update(void) {}
283
284static inline int reserve_pecoff_reloc_section(int c)
285{
286 return 0;
287}
288#endif /* CONFIG_EFI_STUB */
289
290
291/*
292 * Parse zoffset.h and find the entry points. We could just #include zoffset.h
293 * but that would mean tools/build would have to be rebuilt every time. It's
294 * not as if parsing it is hard...
295 */
296#define PARSE_ZOFS(p, sym) do { \
297 if (!strncmp(p, "#define ZO_" #sym " ", 11+sizeof(#sym))) \
298 sym = strtoul(p + 11 + sizeof(#sym), NULL, 16); \
299} while (0)
300
301static void parse_zoffset(char *fname)
302{
303 FILE *file;
304 char *p;
305 int c;
306
307 file = fopen(fname, "r");
308 if (!file)
309 die("Unable to open `%s': %m", fname);
310 c = fread(buf, 1, sizeof(buf) - 1, file);
311 if (ferror(file))
312 die("read-error on `zoffset.h'");
313 fclose(file);
314 buf[c] = 0;
315
316 p = (char *)buf;
317
318 while (p && *p) {
319 PARSE_ZOFS(p, efi32_stub_entry);
320 PARSE_ZOFS(p, efi64_stub_entry);
321 PARSE_ZOFS(p, efi_pe_entry);
322 PARSE_ZOFS(p, startup_64);
323
324 p = strchr(p, '\n');
325 while (p && (*p == '\r' || *p == '\n'))
326 p++;
327 }
328}
329
330int main(int argc, char ** argv)
331{
332 unsigned int i, sz, setup_sectors, init_sz;
333 int c;
334 u32 sys_size;
335 struct stat sb;
336 FILE *file, *dest;
337 int fd;
338 void *kernel;
339 u32 crc = 0xffffffffUL;
340
341 efi_stub_defaults();
342
343 if (argc != 5)
344 usage();
345 parse_zoffset(argv[3]);
346
347 dest = fopen(argv[4], "w");
348 if (!dest)
349 die("Unable to write `%s': %m", argv[4]);
350
351 /* Copy the setup code */
352 file = fopen(argv[1], "r");
353 if (!file)
354 die("Unable to open `%s': %m", argv[1]);
355 c = fread(buf, 1, sizeof(buf), file);
356 if (ferror(file))
357 die("read-error on `setup'");
358 if (c < 1024)
359 die("The setup must be at least 1024 bytes");
360 if (get_unaligned_le16(&buf[510]) != 0xAA55)
361 die("Boot block hasn't got boot flag (0xAA55)");
362 fclose(file);
363
364 c += reserve_pecoff_reloc_section(c);
365
366 /* Pad unused space with zeros */
367 setup_sectors = (c + 511) / 512;
368 if (setup_sectors < SETUP_SECT_MIN)
369 setup_sectors = SETUP_SECT_MIN;
370 i = setup_sectors*512;
371 memset(buf+c, 0, i-c);
372
373 update_pecoff_setup_and_reloc(i);
374
375 /* Set the default root device */
376 put_unaligned_le16(DEFAULT_ROOT_DEV, &buf[508]);
377
378 printf("Setup is %d bytes (padded to %d bytes).\n", c, i);
379
380 /* Open and stat the kernel file */
381 fd = open(argv[2], O_RDONLY);
382 if (fd < 0)
383 die("Unable to open `%s': %m", argv[2]);
384 if (fstat(fd, &sb))
385 die("Unable to stat `%s': %m", argv[2]);
386 sz = sb.st_size;
387 printf("System is %d kB\n", (sz+1023)/1024);
388 kernel = mmap(NULL, sz, PROT_READ, MAP_SHARED, fd, 0);
389 if (kernel == MAP_FAILED)
390 die("Unable to mmap '%s': %m", argv[2]);
391 /* Number of 16-byte paragraphs, including space for a 4-byte CRC */
392 sys_size = (sz + 15 + 4) / 16;
393
394 /* Patch the setup code with the appropriate size parameters */
395 buf[0x1f1] = setup_sectors-1;
396 put_unaligned_le32(sys_size, &buf[0x1f4]);
397
398 update_pecoff_text(setup_sectors * 512, i + (sys_size * 16));
399 init_sz = get_unaligned_le32(&buf[0x260]);
400 update_pecoff_bss(i + (sys_size * 16), init_sz);
401
402 efi_stub_entry_update();
403
404 crc = partial_crc32(buf, i, crc);
405 if (fwrite(buf, 1, i, dest) != i)
406 die("Writing setup failed");
407
408 /* Copy the kernel code */
409 crc = partial_crc32(kernel, sz, crc);
410 if (fwrite(kernel, 1, sz, dest) != sz)
411 die("Writing kernel failed");
412
413 /* Add padding leaving 4 bytes for the checksum */
414 while (sz++ < (sys_size*16) - 4) {
415 crc = partial_crc32_one('\0', crc);
416 if (fwrite("\0", 1, 1, dest) != 1)
417 die("Writing padding failed");
418 }
419
420 /* Write the CRC */
421 printf("CRC %x\n", crc);
422 put_unaligned_le32(crc, buf);
423 if (fwrite(buf, 1, 4, dest) != 4)
424 die("Writing CRC failed");
425
426 /* Catch any delayed write failures */
427 if (fclose(dest))
428 die("Writing image failed");
429
430 close(fd);
431
432 /* Everything is OK */
433 return 0;
434}