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
|
/*
* CBFS Image Manipulation
*
* Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#ifndef __CBFS_IMAGE_H
#define __CBFS_IMAGE_H
#include "common.h"
#include "cbfs.h"
#define IS_TOP_ALIGNED_ADDRESS(x) ((uint32_t)(x) > 0x80000000)
/* CBFS image processing */
struct cbfs_image {
struct buffer buffer;
struct cbfs_header *header;
};
/* Given a pointer, serialize the header from host-native byte format
* to cbfs format, i.e. big-endian. */
void cbfs_put_header(void *dest, const struct cbfs_header *header);
/* Or deserialize into host-native format */
void cbfs_get_header(struct cbfs_header *header, const void *src);
/* Creates an empty CBFS image by given size, and description to its content
* (bootblock, align, header location, starting offset of CBFS entries.
* The output image will contain a valid cbfs_header, with one cbfs_file
* entry with type CBFS_COMPONENT_NULL, with max available size.
* Returns 0 on success, otherwise none-zero. */
int cbfs_image_create(struct cbfs_image *image,
uint32_t arch,
size_t size,
uint32_t align,
struct buffer *bootblock,
int32_t bootblock_offset,
int32_t header_offset,
int32_t entries_offset);
/* Loads a CBFS image from file. Returns 0 on success, otherwise non-zero. */
int cbfs_image_from_file(struct cbfs_image *image,
const char *filename, uint32_t offset);
/* Create a duplicate CBFS image. Returns 0 on success, otherwise non-zero. */
int cbfs_copy_instance(struct cbfs_image *image, size_t copy_offset,
size_t copy_size);
/* Writes a CBFS image into file. Returns 0 on success, otherwise non-zero. */
int cbfs_image_write_file(struct cbfs_image *image, const char *filename);
/* Releases the CBFS image. Returns 0 on success, otherwise non-zero. */
int cbfs_image_delete(struct cbfs_image *image);
/* Returns a pointer to entry by name, or NULL if name is not found. */
struct cbfs_file *cbfs_get_entry(struct cbfs_image *image, const char *name);
/* Exports an entry to external file.
* Returns 0 on success, otherwise (ex, not found) non-zero. */
int cbfs_export_entry(struct cbfs_image *image, const char *entry_name,
const char *filename);
/* Adds an entry to CBFS image by given name and type. If content_offset is
* non-zero, try to align "content" (CBFS_SUBHEADER(p)) at content_offset.
* Returns 0 on success, otherwise non-zero. */
int cbfs_add_entry(struct cbfs_image *image, struct buffer *buffer,
const char *name, uint32_t type, uint32_t content_offset);
/* Removes an entry from CBFS image. Returns 0 on success, otherwise non-zero. */
int cbfs_remove_entry(struct cbfs_image *image, const char *name);
/* Initializes a new empty (type = NULL) entry with size and name in CBFS image.
* Returns 0 on success, otherwise (ex, not found) non-zero. */
int cbfs_create_empty_entry(struct cbfs_file *entry,
size_t len, const char *name);
/* Finds a location to put given content by specified criteria:
* "page_size" limits the content to fit on same memory page, and
* "align" specifies starting address alignment.
* Returns a valid offset, or -1 on failure. */
int32_t cbfs_locate_entry(struct cbfs_image *image, const char *name,
uint32_t size, uint32_t page_size, uint32_t align);
/* Callback function used by cbfs_walk.
* Returns 0 on success, or non-zero to stop further iteration. */
typedef int (*cbfs_entry_callback)(struct cbfs_image *image,
struct cbfs_file *file,
void *arg);
/* Iterates through all entries in CBFS image, and invoke with callback.
* Stops if callback returns non-zero values.
* Returns number of entries invoked. */
int cbfs_walk(struct cbfs_image *image, cbfs_entry_callback callback, void *arg);
/* Primitive CBFS utilities */
/* Returns a pointer to the only valid CBFS header in give buffer, otherwise
* NULL (including when multiple headers were found). If there is a X86 ROM
* style signature (pointer at 0xfffffffc) found in ROM, it will be selected as
* the only header.*/
struct cbfs_header *cbfs_find_header(char *data, size_t size,
uint32_t forced_offset);
/* Returns the first cbfs_file entry in CBFS image by CBFS header (no matter if
* the entry has valid content or not), otherwise NULL. */
struct cbfs_file *cbfs_find_first_entry(struct cbfs_image *image);
/* Returns next cbfs_file entry (no matter if its content is valid or not), or
* NULL on failure. */
struct cbfs_file *cbfs_find_next_entry(struct cbfs_image *image,
struct cbfs_file *entry);
/* Returns ROM address (offset) of entry.
* This is different from entry->offset (pointer to content). */
uint32_t cbfs_get_entry_addr(struct cbfs_image *image, struct cbfs_file *entry);
/* Returns 1 if entry has valid data (by checking magic number), otherwise 0. */
int cbfs_is_valid_entry(struct cbfs_image *image, struct cbfs_file *entry);
/* Print CBFS component information. */
int cbfs_print_directory(struct cbfs_image *image);
int cbfs_print_header_info(struct cbfs_image *image);
int cbfs_print_entry_info(struct cbfs_image *image, struct cbfs_file *entry,
void *arg);
/* Merge empty entries starting from given entry.
* Returns 0 on success, otherwise non-zero. */
int cbfs_merge_empty_entry(struct cbfs_image *image, struct cbfs_file *entry,
void *arg);
#endif
|
