4 * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
6 * SPDX-License-Identifier: GPL-2.0+
12 #include "os_support.h"
19 #include <sys/types.h>
22 #include <u-boot/sha1.h>
26 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
28 #define IH_ARCH_DEFAULT IH_ARCH_INVALID
31 * This structure defines all such variables those are initialized by
32 * mkimage and dumpimage main core and need to be referred by image
33 * type specific functions
35 struct image_tool_params {
57 const char *outfile; /* Output filename */
58 const char *keydir; /* Directory holding private keys */
59 const char *keydest; /* Destination .dtb for public key */
60 const char *comment; /* Comment to add to signature node */
61 int require_keys; /* 1 to mark signing keys as 'required' */
62 int file_size; /* Total size of output file */
66 * image type specific variables and callback functions
68 struct image_type_params {
69 /* name is an identification tag string for added support */
72 * header size is local to the specific image type to be supported,
73 * mkimage core treats this as number of bytes
76 /* Image type header pointer */
79 * There are several arguments that are passed on the command line
80 * and are registered as flags in image_tool_params structure.
81 * This callback function can be used to check the passed arguments
82 * are in-lined with the image type to be supported
84 * Returns 1 if parameter check is successful
86 int (*check_params) (struct image_tool_params *);
88 * This function is used by list command (i.e. mkimage -l <filename>)
89 * image type verification code must be put here
91 * Returns 0 if image header verification is successful
92 * otherwise, returns respective negative error codes
94 int (*verify_header) (unsigned char *, int, struct image_tool_params *);
95 /* Prints image information abstracting from image header */
96 void (*print_header) (const void *);
98 * The header or image contents need to be set as per image type to
99 * be generated using this callback function.
100 * further output file post processing (for ex. checksum calculation,
101 * padding bytes etc..) can also be done in this callback function.
103 void (*set_header) (void *, struct stat *, int,
104 struct image_tool_params *);
106 * This function is used by the command to retrieve a component
107 * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
109 * Thus the code to extract a file from an image must be put here.
111 * Returns 0 if the file was successfully retrieved from the image,
112 * or a negative value on error.
114 int (*extract_subimage)(void *, struct image_tool_params *);
116 * Some image generation support for ex (default image type) supports
117 * more than one type_ids, this callback function is used to check
118 * whether input (-T <image_type>) is supported by registered image
119 * generation/list low level code
121 int (*check_image_type) (uint8_t);
122 /* This callback function will be executed if fflag is defined */
123 int (*fflag_handle) (struct image_tool_params *);
125 * This callback function will be executed for variable size record
126 * It is expected to build this header in memory and return its length
127 * and a pointer to it by using image_type_params.header_size and
128 * image_type_params.hdr. The return value shall indicate if an
129 * additional padding should be used when copying the data image
130 * by returning the padding length.
132 int (*vrec_header) (struct image_tool_params *,
133 struct image_type_params *);
137 * imagetool_get_type() - find the image type params for a given image type
139 * It scans all registers image type supports
140 * checks the input type for each supported image type
143 * returns respective image_type_params pointer if success
144 * if input type_id is not supported by any of image_type_support
147 struct image_type_params *imagetool_get_type(int type);
150 * imagetool_verify_print_header() - verifies the image header
152 * Scan registered image types and verify the image_header for each
153 * supported image type. If verification is successful, this prints
154 * the respective header.
156 * @return 0 on success, negative if input image format does not match with
157 * any of supported image types
159 int imagetool_verify_print_header(
162 struct image_type_params *tparams,
163 struct image_tool_params *params);
166 * imagetool_save_subimage - store data into a file
167 * @file_name: name of the destination file
168 * @file_data: data to be written
169 * @file_len: the amount of data to store
171 * imagetool_save_subimage() store file_len bytes of data pointed by file_data
172 * into the file name by file_name.
175 * zero in case of success or a negative value if fail.
177 int imagetool_save_subimage(
178 const char *file_name,
183 * There is a c file associated with supported image type low level code
184 * for ex. default_image.c, fit_image.c
188 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
190 #define ___cat(a, b) a ## b
191 #define __cat(a, b) ___cat(a, b)
193 /* we need some special handling for this host tool running eventually on
194 * Darwin. The Mach-O section handling is a bit different than ELF section
195 * handling. The differnces in detail are:
196 * a) we have segments which have sections
197 * b) we need a API call to get the respective section symbols */
198 #if defined(__MACH__)
199 #include <mach-o/getsect.h>
201 #define INIT_SECTION(name) do { \
202 unsigned long name ## _len; \
203 char *__cat(pstart_, name) = getsectdata("__TEXT", \
204 #name, &__cat(name, _len)); \
205 char *__cat(pstop_, name) = __cat(pstart_, name) + \
207 __cat(__start_, name) = (void *)__cat(pstart_, name); \
208 __cat(__stop_, name) = (void *)__cat(pstop_, name); \
210 #define SECTION(name) __attribute__((section("__TEXT, " #name)))
212 struct image_type_params **__start_image_type, **__stop_image_type;
214 #define INIT_SECTION(name) /* no-op for ELF */
215 #define SECTION(name) __attribute__((section(#name)))
217 /* We construct a table of pointers in an ELF section (pointers generally
218 * go unpadded by gcc). ld creates boundary syms for us. */
219 extern struct image_type_params *__start_image_type[], *__stop_image_type[];
220 #endif /* __MACH__ */
223 # if __GNUC__ == 3 && __GNUC_MINOR__ < 3
224 # define __used __attribute__((__unused__))
226 # define __used __attribute__((__used__))
230 #define U_BOOT_IMAGE_TYPE( \
244 static struct image_type_params __cat(image_type_, _id) = \
247 .header_size = _header_size, \
249 .check_params = _check_params, \
250 .verify_header = _verify_header, \
251 .print_header = _print_header, \
252 .set_header = _set_header, \
253 .extract_subimage = _extract_subimage, \
254 .check_image_type = _check_image_type, \
255 .fflag_handle = _fflag_handle, \
256 .vrec_header = _vrec_header \
258 static struct image_type_params *SECTION(image_type) __used \
259 __cat(image_type_ptr_, _id) = &__cat(image_type_, _id)
261 #endif /* _IMAGETOOL_H_ */