tools/imagetool.h

   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 };
  80
  81 /*
  82  * image type specific variables and callback functions
  83  */
  84 struct image_type_params {
  85         /* name is an identification tag string for added support */
  86         char *name;
  87         /*
  88          * header size is local to the specific image type to be supported,
  89          * mkimage core treats this as number of bytes
  90          */
  91         uint32_t header_size;
  92         /* Image type header pointer */
  93         void *hdr;
  94         /*
  95          * There are several arguments that are passed on the command line
  96          * and are registered as flags in image_tool_params structure.
  97          * This callback function can be used to check the passed arguments
  98          * are in-lined with the image type to be supported
  99          *
 100          * Returns 1 if parameter check is successful
 101          */
 102         int (*check_params) (struct image_tool_params *);
 103         /*
 104          * This function is used by list command (i.e. mkimage -l <filename>)
 105          * image type verification code must be put here
 106          *
 107          * Returns 0 if image header verification is successful
 108          * otherwise, returns respective negative error codes
 109          */
 110         int (*verify_header) (unsigned char *, int, struct image_tool_params *);
 111         /* Prints image information abstracting from image header */
 112         void (*print_header) (const void *);
 113         /*
 114          * The header or image contents need to be set as per image type to
 115          * be generated using this callback function.
 116          * further output file post processing (for ex. checksum calculation,
 117          * padding bytes etc..) can also be done in this callback function.
 118          */
 119         void (*set_header) (void *, struct stat *, int,
 120                                         struct image_tool_params *);
 121         /*
 122          * This function is used by the command to retrieve a component
 123          * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
 124          * <sub-image-name>).
 125          * Thus the code to extract a file from an image must be put here.
 126          *
 127          * Returns 0 if the file was successfully retrieved from the image,
 128          * or a negative value on error.
 129          */
 130         int (*extract_subimage)(void *, struct image_tool_params *);
 131         /*
 132          * Some image generation support for ex (default image type) supports
 133          * more than one type_ids, this callback function is used to check
 134          * whether input (-T <image_type>) is supported by registered image
 135          * generation/list low level code
 136          */
 137         int (*check_image_type) (uint8_t);
 138         /* This callback function will be executed if fflag is defined */
 139         int (*fflag_handle) (struct image_tool_params *);
 140         /*
 141          * This callback function will be executed for variable size record
 142          * It is expected to build this header in memory and return its length
 143          * and a pointer to it by using image_type_params.header_size and
 144          * image_type_params.hdr. The return value shall indicate if an
 145          * additional padding should be used when copying the data image
 146          * by returning the padding length.
 147          */
 148         int (*vrec_header) (struct image_tool_params *,
 149                 struct image_type_params *);
 150 };
 151
 152 /**
 153  * imagetool_get_type() - find the image type params for a given image type
 154  *
 155  * It scans all registers image type supports
 156  * checks the input type for each supported image type
 157  *
 158  * if successful,
 159  *     returns respective image_type_params pointer if success
 160  * if input type_id is not supported by any of image_type_support
 161  *     returns NULL
 162  */
 163 struct image_type_params *imagetool_get_type(int type);
 164
 165 /*
 166  * imagetool_verify_print_header() - verifies the image header
 167  *
 168  * Scan registered image types and verify the image_header for each
 169  * supported image type. If verification is successful, this prints
 170  * the respective header.
 171  *
 172  * @return 0 on success, negative if input image format does not match with
 173  * any of supported image types
 174  */
 175 int imagetool_verify_print_header(
 176         void *ptr,
 177         struct stat *sbuf,
 178         struct image_type_params *tparams,
 179         struct image_tool_params *params);
 180
 181 /**
 182  * imagetool_save_subimage - store data into a file
 183  * @file_name: name of the destination file
 184  * @file_data: data to be written
 185  * @file_len: the amount of data to store
 186  *
 187  * imagetool_save_subimage() store file_len bytes of data pointed by file_data
 188  * into the file name by file_name.
 189  *
 190  * returns:
 191  *     zero in case of success or a negative value if fail.
 192  */
 193 int imagetool_save_subimage(
 194         const char *file_name,
 195         ulong file_data,
 196         ulong file_len);
 197
 198 /**
 199  * imagetool_get_filesize() - Utility function to obtain the size of a file
 200  *
 201  * This function prints a message if an error occurs, showing the error that
 202  * was obtained.
 203  *
 204  * @params:     mkimage parameters
 205  * @fname:      filename to check
 206  * @return size of file, or -ve value on error
 207  */
 208 int imagetool_get_filesize(struct image_tool_params *params, const char *fname);
 209
 210 /**
 211  * imagetool_get_source_date() - Get timestamp for build output.
 212  *
 213  * Gets a timestamp for embedding it in a build output. If set
 214  * SOURCE_DATE_EPOCH is used. Else the given fallback value is returned. Prints
 215  * an error message if SOURCE_DATE_EPOCH contains an invalid value and returns
 216  * 0.
 217  *
 218  * @params:     mkimage parameters
 219  * @fallback:   timestamp to use if SOURCE_DATE_EPOCH isn't set
 220  * @return timestamp based on SOURCE_DATE_EPOCH
 221  */
 222 time_t imagetool_get_source_date(
 223         struct image_tool_params *params,
 224         time_t fallback);
 225
 226 /*
 227  * There is a c file associated with supported image type low level code
 228  * for ex. default_image.c, fit_image.c
 229  */
 230
 231
 232 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
 233
 234 #define ___cat(a, b) a ## b
 235 #define __cat(a, b) ___cat(a, b)
 236
 237 /* we need some special handling for this host tool running eventually on
 238  * Darwin. The Mach-O section handling is a bit different than ELF section
 239  * handling. The differnces in detail are:
 240  *  a) we have segments which have sections
 241  *  b) we need a API call to get the respective section symbols */
 242 #if defined(__MACH__)
 243 #include <mach-o/getsect.h>
 244
 245 #define INIT_SECTION(name)  do {                                        \
 246                 unsigned long name ## _len;                             \
 247                 char *__cat(pstart_, name) = getsectdata("__TEXT",      \
 248                         #name, &__cat(name, _len));                     \
 249                 char *__cat(pstop_, name) = __cat(pstart_, name) +      \
 250                         __cat(name, _len);                              \
 251                 __cat(__start_, name) = (void *)__cat(pstart_, name);   \
 252                 __cat(__stop_, name) = (void *)__cat(pstop_, name);     \
 253         } while (0)
 254 #define SECTION(name)   __attribute__((section("__TEXT, " #name)))
 255
 256 struct image_type_params **__start_image_type, **__stop_image_type;
 257 #else
 258 #define INIT_SECTION(name) /* no-op for ELF */
 259 #define SECTION(name)   __attribute__((section(#name)))
 260
 261 /* We construct a table of pointers in an ELF section (pointers generally
 262  * go unpadded by gcc).  ld creates boundary syms for us. */
 263 extern struct image_type_params *__start_image_type[], *__stop_image_type[];
 264 #endif /* __MACH__ */
 265
 266 #if !defined(__used)
 267 # if __GNUC__ == 3 && __GNUC_MINOR__ < 3
 268 #  define __used                        __attribute__((__unused__))
 269 # else
 270 #  define __used                        __attribute__((__used__))
 271 # endif
 272 #endif
 273
 274 #define U_BOOT_IMAGE_TYPE( \
 275                 _id, \
 276                 _name, \
 277                 _header_size, \
 278                 _header, \
 279                 _check_params, \
 280                 _verify_header, \
 281                 _print_header, \
 282                 _set_header, \
 283                 _extract_subimage, \
 284                 _check_image_type, \
 285                 _fflag_handle, \
 286                 _vrec_header \
 287         ) \
 288         static struct image_type_params __cat(image_type_, _id) = \
 289         { \
 290                 .name = _name, \
 291                 .header_size = _header_size, \
 292                 .hdr = _header, \
 293                 .check_params = _check_params, \
 294                 .verify_header = _verify_header, \
 295                 .print_header = _print_header, \
 296                 .set_header = _set_header, \
 297                 .extract_subimage = _extract_subimage, \
 298                 .check_image_type = _check_image_type, \
 299                 .fflag_handle = _fflag_handle, \
 300                 .vrec_header = _vrec_header \
 301         }; \
 302         static struct image_type_params *SECTION(image_type) __used \
 303                 __cat(image_type_ptr_, _id) = &__cat(image_type_, _id)
 304
 305 #endif /* _IMAGETOOL_H_ */