1 /* 2 * (C) Copyright 2013 3 * 4 * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #ifndef _IMAGETOOL_H_ 10 #define _IMAGETOOL_H_ 11 12 #include "os_support.h" 13 #include <errno.h> 14 #include <fcntl.h> 15 #include <stdio.h> 16 #include <stdlib.h> 17 #include <string.h> 18 #include <sys/stat.h> 19 #include <sys/types.h> 20 #include <time.h> 21 #include <unistd.h> 22 #include <u-boot/sha1.h> 23 24 #include "fdt_host.h" 25 26 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 27 28 #define IH_ARCH_DEFAULT IH_ARCH_INVALID 29 30 /* Information about a file that needs to be placed into the FIT */ 31 struct content_info { 32 struct content_info *next; 33 int type; /* File type (IH_TYPE_...) */ 34 const char *fname; 35 }; 36 37 /* 38 * This structure defines all such variables those are initialized by 39 * mkimage and dumpimage main core and need to be referred by image 40 * type specific functions 41 */ 42 struct image_tool_params { 43 int dflag; 44 int eflag; 45 int fflag; 46 int iflag; 47 int lflag; 48 int pflag; 49 int vflag; 50 int xflag; 51 int skipcpy; 52 int os; 53 int arch; 54 int type; 55 int comp; 56 char *dtc; 57 unsigned int addr; 58 unsigned int ep; 59 char *imagename; 60 char *imagename2; 61 char *datafile; 62 char *imagefile; 63 char *cmdname; 64 const char *outfile; /* Output filename */ 65 const char *keydir; /* Directory holding private keys */ 66 const char *keydest; /* Destination .dtb for public key */ 67 const char *comment; /* Comment to add to signature node */ 68 int require_keys; /* 1 to mark signing keys as 'required' */ 69 int file_size; /* Total size of output file */ 70 int orig_file_size; /* Original size for file before padding */ 71 bool auto_its; /* Automatically create the .its file */ 72 int fit_image_type; /* Image type to put into the FIT */ 73 char *fit_ramdisk; /* Ramdisk file to include */ 74 struct content_info *content_head; /* List of files to include */ 75 struct content_info *content_tail; 76 bool external_data; /* Store data outside the FIT */ 77 bool quiet; /* Don't output text in normal operation */ 78 unsigned int external_offset; /* Add padding to external data */ 79 const char *engine_id; /* Engine to use for signing */ 80 }; 81 82 /* 83 * image type specific variables and callback functions 84 */ 85 struct image_type_params { 86 /* name is an identification tag string for added support */ 87 char *name; 88 /* 89 * header size is local to the specific image type to be supported, 90 * mkimage core treats this as number of bytes 91 */ 92 uint32_t header_size; 93 /* Image type header pointer */ 94 void *hdr; 95 /* 96 * There are several arguments that are passed on the command line 97 * and are registered as flags in image_tool_params structure. 98 * This callback function can be used to check the passed arguments 99 * are in-lined with the image type to be supported 100 * 101 * Returns 1 if parameter check is successful 102 */ 103 int (*check_params) (struct image_tool_params *); 104 /* 105 * This function is used by list command (i.e. mkimage -l <filename>) 106 * image type verification code must be put here 107 * 108 * Returns 0 if image header verification is successful 109 * otherwise, returns respective negative error codes 110 */ 111 int (*verify_header) (unsigned char *, int, struct image_tool_params *); 112 /* Prints image information abstracting from image header */ 113 void (*print_header) (const void *); 114 /* 115 * The header or image contents need to be set as per image type to 116 * be generated using this callback function. 117 * further output file post processing (for ex. checksum calculation, 118 * padding bytes etc..) can also be done in this callback function. 119 */ 120 void (*set_header) (void *, struct stat *, int, 121 struct image_tool_params *); 122 /* 123 * This function is used by the command to retrieve a component 124 * (sub-image) from the image (i.e. dumpimage -i <image> -p <position> 125 * <sub-image-name>). 126 * Thus the code to extract a file from an image must be put here. 127 * 128 * Returns 0 if the file was successfully retrieved from the image, 129 * or a negative value on error. 130 */ 131 int (*extract_subimage)(void *, struct image_tool_params *); 132 /* 133 * Some image generation support for ex (default image type) supports 134 * more than one type_ids, this callback function is used to check 135 * whether input (-T <image_type>) is supported by registered image 136 * generation/list low level code 137 */ 138 int (*check_image_type) (uint8_t); 139 /* This callback function will be executed if fflag is defined */ 140 int (*fflag_handle) (struct image_tool_params *); 141 /* 142 * This callback function will be executed for variable size record 143 * It is expected to build this header in memory and return its length 144 * and a pointer to it by using image_type_params.header_size and 145 * image_type_params.hdr. The return value shall indicate if an 146 * additional padding should be used when copying the data image 147 * by returning the padding length. 148 */ 149 int (*vrec_header) (struct image_tool_params *, 150 struct image_type_params *); 151 }; 152 153 /** 154 * imagetool_get_type() - find the image type params for a given image type 155 * 156 * It scans all registers image type supports 157 * checks the input type for each supported image type 158 * 159 * if successful, 160 * returns respective image_type_params pointer if success 161 * if input type_id is not supported by any of image_type_support 162 * returns NULL 163 */ 164 struct image_type_params *imagetool_get_type(int type); 165 166 /* 167 * imagetool_verify_print_header() - verifies the image header 168 * 169 * Scan registered image types and verify the image_header for each 170 * supported image type. If verification is successful, this prints 171 * the respective header. 172 * 173 * @return 0 on success, negative if input image format does not match with 174 * any of supported image types 175 */ 176 int imagetool_verify_print_header( 177 void *ptr, 178 struct stat *sbuf, 179 struct image_type_params *tparams, 180 struct image_tool_params *params); 181 182 /** 183 * imagetool_save_subimage - store data into a file 184 * @file_name: name of the destination file 185 * @file_data: data to be written 186 * @file_len: the amount of data to store 187 * 188 * imagetool_save_subimage() store file_len bytes of data pointed by file_data 189 * into the file name by file_name. 190 * 191 * returns: 192 * zero in case of success or a negative value if fail. 193 */ 194 int imagetool_save_subimage( 195 const char *file_name, 196 ulong file_data, 197 ulong file_len); 198 199 /** 200 * imagetool_get_filesize() - Utility function to obtain the size of a file 201 * 202 * This function prints a message if an error occurs, showing the error that 203 * was obtained. 204 * 205 * @params: mkimage parameters 206 * @fname: filename to check 207 * @return size of file, or -ve value on error 208 */ 209 int imagetool_get_filesize(struct image_tool_params *params, const char *fname); 210 211 /** 212 * imagetool_get_source_date() - Get timestamp for build output. 213 * 214 * Gets a timestamp for embedding it in a build output. If set 215 * SOURCE_DATE_EPOCH is used. Else the given fallback value is returned. Prints 216 * an error message if SOURCE_DATE_EPOCH contains an invalid value and returns 217 * 0. 218 * 219 * @params: mkimage parameters 220 * @fallback: timestamp to use if SOURCE_DATE_EPOCH isn't set 221 * @return timestamp based on SOURCE_DATE_EPOCH 222 */ 223 time_t imagetool_get_source_date( 224 struct image_tool_params *params, 225 time_t fallback); 226 227 /* 228 * There is a c file associated with supported image type low level code 229 * for ex. default_image.c, fit_image.c 230 */ 231 232 233 void pbl_load_uboot(int fd, struct image_tool_params *mparams); 234 235 #define ___cat(a, b) a ## b 236 #define __cat(a, b) ___cat(a, b) 237 238 /* we need some special handling for this host tool running eventually on 239 * Darwin. The Mach-O section handling is a bit different than ELF section 240 * handling. The differnces in detail are: 241 * a) we have segments which have sections 242 * b) we need a API call to get the respective section symbols */ 243 #if defined(__MACH__) 244 #include <mach-o/getsect.h> 245 246 #define INIT_SECTION(name) do { \ 247 unsigned long name ## _len; \ 248 char *__cat(pstart_, name) = getsectdata("__TEXT", \ 249 #name, &__cat(name, _len)); \ 250 char *__cat(pstop_, name) = __cat(pstart_, name) + \ 251 __cat(name, _len); \ 252 __cat(__start_, name) = (void *)__cat(pstart_, name); \ 253 __cat(__stop_, name) = (void *)__cat(pstop_, name); \ 254 } while (0) 255 #define SECTION(name) __attribute__((section("__TEXT, " #name))) 256 257 struct image_type_params **__start_image_type, **__stop_image_type; 258 #else 259 #define INIT_SECTION(name) /* no-op for ELF */ 260 #define SECTION(name) __attribute__((section(#name))) 261 262 /* We construct a table of pointers in an ELF section (pointers generally 263 * go unpadded by gcc). ld creates boundary syms for us. */ 264 extern struct image_type_params *__start_image_type[], *__stop_image_type[]; 265 #endif /* __MACH__ */ 266 267 #if !defined(__used) 268 # if __GNUC__ == 3 && __GNUC_MINOR__ < 3 269 # define __used __attribute__((__unused__)) 270 # else 271 # define __used __attribute__((__used__)) 272 # endif 273 #endif 274 275 #define U_BOOT_IMAGE_TYPE( \ 276 _id, \ 277 _name, \ 278 _header_size, \ 279 _header, \ 280 _check_params, \ 281 _verify_header, \ 282 _print_header, \ 283 _set_header, \ 284 _extract_subimage, \ 285 _check_image_type, \ 286 _fflag_handle, \ 287 _vrec_header \ 288 ) \ 289 static struct image_type_params __cat(image_type_, _id) = \ 290 { \ 291 .name = _name, \ 292 .header_size = _header_size, \ 293 .hdr = _header, \ 294 .check_params = _check_params, \ 295 .verify_header = _verify_header, \ 296 .print_header = _print_header, \ 297 .set_header = _set_header, \ 298 .extract_subimage = _extract_subimage, \ 299 .check_image_type = _check_image_type, \ 300 .fflag_handle = _fflag_handle, \ 301 .vrec_header = _vrec_header \ 302 }; \ 303 static struct image_type_params *SECTION(image_type) __used \ 304 __cat(image_type_ptr_, _id) = &__cat(image_type_, _id) 305 306 #endif /* _IMAGETOOL_H_ */ 307