summaryrefslogtreecommitdiff
path: root/tools/mkeficapsule.c
blob: 4995ba4e0c2a4fb7c0afa1d0bb9fcc5d168fe747 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright 2018 Linaro Limited
 *		Author: AKASHI Takahiro
 */

#include <getopt.h>
#include <malloc.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/types.h>

#include <sys/stat.h>
#include <sys/types.h>

typedef __u8 u8;
typedef __u16 u16;
typedef __u32 u32;
typedef __u64 u64;
typedef __s16 s16;
typedef __s32 s32;

#define aligned_u64 __aligned_u64

#ifndef __packed
#define __packed __attribute__((packed))
#endif

#include <efi.h>
#include <efi_api.h>

static const char *tool_name = "mkeficapsule";

efi_guid_t efi_guid_fm_capsule = EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID;
efi_guid_t efi_guid_image_type_uboot_fit =
		EFI_FIRMWARE_IMAGE_TYPE_UBOOT_FIT_GUID;
efi_guid_t efi_guid_image_type_uboot_raw =
		EFI_FIRMWARE_IMAGE_TYPE_UBOOT_RAW_GUID;

static struct option options[] = {
	{"fit", required_argument, NULL, 'f'},
	{"raw", required_argument, NULL, 'r'},
	{"index", required_argument, NULL, 'i'},
	{"instance", required_argument, NULL, 'I'},
	{"help", no_argument, NULL, 'h'},
	{NULL, 0, NULL, 0},
};

static void print_usage(void)
{
	printf("Usage: %s [options] <output file>\n"
	       "Options:\n"

	       "\t-f, --fit <fit image>       new FIT image file\n"
	       "\t-r, --raw <raw image>       new raw image file\n"
	       "\t-i, --index <index>         update image index\n"
	       "\t-I, --instance <instance>   update hardware instance\n"
	       "\t-h, --help                  print a help message\n",
	       tool_name);
}

static int create_fwbin(char *path, char *bin, efi_guid_t *guid,
			unsigned long index, unsigned long instance)
{
	struct efi_capsule_header header;
	struct efi_firmware_management_capsule_header capsule;
	struct efi_firmware_management_capsule_image_header image;
	FILE *f, *g;
	struct stat bin_stat;
	u8 *data;
	size_t size;
	u64 offset;

#ifdef DEBUG
	printf("For output: %s\n", path);
	printf("\tbin: %s\n\ttype: %pUl\n", bin, guid);
	printf("\tindex: %ld\n\tinstance: %ld\n", index, instance);
#endif

	g = fopen(bin, "r");
	if (!g) {
		printf("cannot open %s\n", bin);
		return -1;
	}
	if (stat(bin, &bin_stat) < 0) {
		printf("cannot determine the size of %s\n", bin);
		goto err_1;
	}
	data = malloc(bin_stat.st_size);
	if (!data) {
		printf("cannot allocate memory: %zx\n", (size_t)bin_stat.st_size);
		goto err_1;
	}
	f = fopen(path, "w");
	if (!f) {
		printf("cannot open %s\n", path);
		goto err_2;
	}
	header.capsule_guid = efi_guid_fm_capsule;
	header.header_size = sizeof(header);
	/* TODO: The current implementation ignores flags */
	header.flags = CAPSULE_FLAGS_PERSIST_ACROSS_RESET;
	header.capsule_image_size = sizeof(header)
					+ sizeof(capsule) + sizeof(u64)
					+ sizeof(image)
					+ bin_stat.st_size;

	size = fwrite(&header, 1, sizeof(header), f);
	if (size < sizeof(header)) {
		printf("write failed (%zx)\n", size);
		goto err_3;
	}

	capsule.version = 0x00000001;
	capsule.embedded_driver_count = 0;
	capsule.payload_item_count = 1;
	size = fwrite(&capsule, 1, sizeof(capsule), f);
	if (size < (sizeof(capsule))) {
		printf("write failed (%zx)\n", size);
		goto err_3;
	}
	offset = sizeof(capsule) + sizeof(u64);
	size = fwrite(&offset, 1, sizeof(offset), f);
	if (size < sizeof(offset)) {
		printf("write failed (%zx)\n", size);
		goto err_3;
	}

	image.version = 0x00000003;
	memcpy(&image.update_image_type_id, guid, sizeof(*guid));
	image.update_image_index = index;
	image.reserved[0] = 0;
	image.reserved[1] = 0;
	image.reserved[2] = 0;
	image.update_image_size = bin_stat.st_size;
	image.update_vendor_code_size = 0; /* none */
	image.update_hardware_instance = instance;
	image.image_capsule_support = 0;

	size = fwrite(&image, 1, sizeof(image), f);
	if (size < sizeof(image)) {
		printf("write failed (%zx)\n", size);
		goto err_3;
	}
	size = fread(data, 1, bin_stat.st_size, g);
	if (size < bin_stat.st_size) {
		printf("read failed (%zx)\n", size);
		goto err_3;
	}
	size = fwrite(data, 1, bin_stat.st_size, f);
	if (size < bin_stat.st_size) {
		printf("write failed (%zx)\n", size);
		goto err_3;
	}

	fclose(f);
	fclose(g);
	free(data);

	return 0;

err_3:
	fclose(f);
err_2:
	free(data);
err_1:
	fclose(g);

	return -1;
}

/*
 * Usage:
 *   $ mkeficapsule -f <firmware binary> <output file>
 */
int main(int argc, char **argv)
{
	char *file;
	efi_guid_t *guid;
	unsigned long index, instance;
	int c, idx;

	file = NULL;
	guid = NULL;
	index = 0;
	instance = 0;
	for (;;) {
		c = getopt_long(argc, argv, "f:r:i:I:v:h", options, &idx);
		if (c == -1)
			break;

		switch (c) {
		case 'f':
			if (file) {
				printf("Image already specified\n");
				return -1;
			}
			file = optarg;
			guid = &efi_guid_image_type_uboot_fit;
			break;
		case 'r':
			if (file) {
				printf("Image already specified\n");
				return -1;
			}
			file = optarg;
			guid = &efi_guid_image_type_uboot_raw;
			break;
		case 'i':
			index = strtoul(optarg, NULL, 0);
			break;
		case 'I':
			instance = strtoul(optarg, NULL, 0);
			break;
		case 'h':
			print_usage();
			return 0;
		}
	}

	/* need an output file */
	if (argc != optind + 1) {
		print_usage();
		exit(EXIT_FAILURE);
	}

	/* need a fit image file or raw image file */
	if (!file) {
		print_usage();
		exit(EXIT_SUCCESS);
	}

	if (create_fwbin(argv[optind], file, guid, index, instance)
			< 0) {
		printf("Creating firmware capsule failed\n");
		exit(EXIT_FAILURE);
	}

	exit(EXIT_SUCCESS);
}