xref: /openbmc/u-boot/tools/fit_common.c (revision e3963c09)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2014
4  * DENX Software Engineering
5  * Heiko Schocher <hs@denx.de>
6  *
7  * (C) Copyright 2008 Semihalf
8  *
9  * (C) Copyright 2000-2004
10  * DENX Software Engineering
11  * Wolfgang Denk, wd@denx.de
12  *
13  * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
14  *		FIT image specific code abstracted from mkimage.c
15  *		some functions added to address abstraction
16  *
17  * All rights reserved.
18  */
19 
20 #include "imagetool.h"
21 #include "mkimage.h"
22 #include "fit_common.h"
23 #include <image.h>
24 #include <u-boot/crc.h>
25 
26 int fit_verify_header(unsigned char *ptr, int image_size,
27 			struct image_tool_params *params)
28 {
29 	return fdt_check_header(ptr);
30 }
31 
32 int fit_check_image_types(uint8_t type)
33 {
34 	if (type == IH_TYPE_FLATDT)
35 		return EXIT_SUCCESS;
36 	else
37 		return EXIT_FAILURE;
38 }
39 
40 int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
41 	     void **blobp, struct stat *sbuf, bool delete_on_error)
42 {
43 	void *ptr;
44 	int fd;
45 
46 	/* Load FIT blob into memory (we need to write hashes/signatures) */
47 	fd = open(fname, O_RDWR | O_BINARY);
48 
49 	if (fd < 0) {
50 		fprintf(stderr, "%s: Can't open %s: %s\n",
51 			cmdname, fname, strerror(errno));
52 		goto err;
53 	}
54 
55 	if (fstat(fd, sbuf) < 0) {
56 		fprintf(stderr, "%s: Can't stat %s: %s\n",
57 			cmdname, fname, strerror(errno));
58 		goto err;
59 	}
60 
61 	if (size_inc) {
62 		sbuf->st_size += size_inc;
63 		if (ftruncate(fd, sbuf->st_size)) {
64 			fprintf(stderr, "%s: Can't expand %s: %s\n",
65 				cmdname, fname, strerror(errno));
66 		goto err;
67 		}
68 	}
69 
70 	errno = 0;
71 	ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
72 	if ((ptr == MAP_FAILED) || (errno != 0)) {
73 		fprintf(stderr, "%s: Can't read %s: %s\n",
74 			cmdname, fname, strerror(errno));
75 		goto err;
76 	}
77 
78 	/* check if ptr has a valid blob */
79 	if (fdt_check_header(ptr)) {
80 		fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
81 		goto err;
82 	}
83 
84 	/* expand if needed */
85 	if (size_inc) {
86 		int ret;
87 
88 		ret = fdt_open_into(ptr, ptr, sbuf->st_size);
89 		if (ret) {
90 			fprintf(stderr, "%s: Cannot expand FDT: %s\n",
91 				cmdname, fdt_strerror(ret));
92 			goto err;
93 		}
94 	}
95 
96 	*blobp = ptr;
97 	return fd;
98 
99 err:
100 	if (fd >= 0)
101 		close(fd);
102 	if (delete_on_error)
103 		unlink(fname);
104 
105 	return -1;
106 }
107