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' */
65 * image type specific variables and callback functions
67 struct image_type_params {
68 /* name is an identification tag string for added support */
71 * header size is local to the specific image type to be supported,
72 * mkimage core treats this as number of bytes
75 /* Image type header pointer */
78 * There are several arguments that are passed on the command line
79 * and are registered as flags in image_tool_params structure.
80 * This callback function can be used to check the passed arguments
81 * are in-lined with the image type to be supported
83 * Returns 1 if parameter check is successful
85 int (*check_params) (struct image_tool_params *);
87 * This function is used by list command (i.e. mkimage -l <filename>)
88 * image type verification code must be put here
90 * Returns 0 if image header verification is successful
91 * otherwise, returns respective negative error codes
93 int (*verify_header) (unsigned char *, int, struct image_tool_params *);
94 /* Prints image information abstracting from image header */
95 void (*print_header) (const void *);
97 * The header or image contents need to be set as per image type to
98 * be generated using this callback function.
99 * further output file post processing (for ex. checksum calculation,
100 * padding bytes etc..) can also be done in this callback function.
102 void (*set_header) (void *, struct stat *, int,
103 struct image_tool_params *);
105 * This function is used by the command to retrieve a component
106 * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
108 * Thus the code to extract a file from an image must be put here.
110 * Returns 0 if the file was successfully retrieved from the image,
111 * or a negative value on error.
113 int (*extract_subimage)(void *, struct image_tool_params *);
115 * Some image generation support for ex (default image type) supports
116 * more than one type_ids, this callback function is used to check
117 * whether input (-T <image_type>) is supported by registered image
118 * generation/list low level code
120 int (*check_image_type) (uint8_t);
121 /* This callback function will be executed if fflag is defined */
122 int (*fflag_handle) (struct image_tool_params *);
124 * This callback function will be executed for variable size record
125 * It is expected to build this header in memory and return its length
126 * and a pointer to it by using image_type_params.header_size and
127 * image_type_params.hdr. The return value shall indicate if an
128 * additional padding should be used when copying the data image
129 * by returning the padding length.
131 int (*vrec_header) (struct image_tool_params *,
132 struct image_type_params *);
136 * imagetool_get_type() - find the image type params for a given image type
138 * It scans all registers image type supports
139 * checks the input type for each supported image type
142 * returns respective image_type_params pointer if success
143 * if input type_id is not supported by any of image_type_support
146 struct image_type_params *imagetool_get_type(int type);
149 * imagetool_verify_print_header() - verifies the image header
151 * Scan registered image types and verify the image_header for each
152 * supported image type. If verification is successful, this prints
153 * the respective header.
155 * @return 0 on success, negative if input image format does not match with
156 * any of supported image types
158 int imagetool_verify_print_header(
161 struct image_type_params *tparams,
162 struct image_tool_params *params);
165 * imagetool_save_subimage - store data into a file
166 * @file_name: name of the destination file
167 * @file_data: data to be written
168 * @file_len: the amount of data to store
170 * imagetool_save_subimage() store file_len bytes of data pointed by file_data
171 * into the file name by file_name.
174 * zero in case of success or a negative value if fail.
176 int imagetool_save_subimage(
177 const char *file_name,
182 * There is a c file associated with supported image type low level code
183 * for ex. default_image.c, fit_image.c
187 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
189 #define ___cat(a, b) a ## b
190 #define __cat(a, b) ___cat(a, b)
192 /* we need some special handling for this host tool running eventually on
193 * Darwin. The Mach-O section handling is a bit different than ELF section
194 * handling. The differnces in detail are:
195 * a) we have segments which have sections
196 * b) we need a API call to get the respective section symbols */
197 #if defined(__MACH__)
198 #include <mach-o/getsect.h>
200 #define INIT_SECTION(name) do { \
201 unsigned long name ## _len; \
202 char *__cat(pstart_, name) = getsectdata("__TEXT", \
203 #name, &__cat(name, _len)); \
204 char *__cat(pstop_, name) = __cat(pstart_, name) + \
206 __cat(__start_, name) = (void *)__cat(pstart_, name); \
207 __cat(__stop_, name) = (void *)__cat(pstop_, name); \
209 #define SECTION(name) __attribute__((section("__TEXT, " #name)))
211 struct image_type_params **__start_image_type, **__stop_image_type;
213 #define INIT_SECTION(name) /* no-op for ELF */
214 #define SECTION(name) __attribute__((section(#name)))
216 /* We construct a table of pointers in an ELF section (pointers generally
217 * go unpadded by gcc). ld creates boundary syms for us. */
218 extern struct image_type_params *__start_image_type[], *__stop_image_type[];
219 #endif /* __MACH__ */
222 # if __GNUC__ == 3 && __GNUC_MINOR__ < 3
223 # define __used __attribute__((__unused__))
225 # define __used __attribute__((__used__))
229 #define U_BOOT_IMAGE_TYPE( \
243 static struct image_type_params __cat(image_type_, _id) = \
246 .header_size = _header_size, \
248 .check_params = _check_params, \
249 .verify_header = _verify_header, \
250 .print_header = _print_header, \
251 .set_header = _set_header, \
252 .extract_subimage = _extract_subimage, \
253 .check_image_type = _check_image_type, \
254 .fflag_handle = _fflag_handle, \
255 .vrec_header = _vrec_header \
257 static struct image_type_params *SECTION(image_type) __used \
258 __cat(image_type_ptr_, _id) = &__cat(image_type_, _id)
260 #endif /* _IMAGETOOL_H_ */