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         struct content_info *content_head;      /* List of files to include */
  74         struct content_info *content_tail;
  75         bool external_data;     /* Store data outside the FIT */
  76 };
  77
  78 /*
  79  * image type specific variables and callback functions
  80  */
  81 struct image_type_params {
  82         /* name is an identification tag string for added support */
  83         char *name;
  84         /*
  85          * header size is local to the specific image type to be supported,
  86          * mkimage core treats this as number of bytes
  87          */
  88         uint32_t header_size;
  89         /* Image type header pointer */
  90         void *hdr;
  91         /*
  92          * There are several arguments that are passed on the command line
  93          * and are registered as flags in image_tool_params structure.
  94          * This callback function can be used to check the passed arguments
  95          * are in-lined with the image type to be supported
  96          *
  97          * Returns 1 if parameter check is successful
  98          */
  99         int (*check_params) (struct image_tool_params *);
 100         /*
 101          * This function is used by list command (i.e. mkimage -l <filename>)
 102          * image type verification code must be put here
 103          *
 104          * Returns 0 if image header verification is successful
 105          * otherwise, returns respective negative error codes
 106          */
 107         int (*verify_header) (unsigned char *, int, struct image_tool_params *);
 108         /* Prints image information abstracting from image header */
 109         void (*print_header) (const void *);
 110         /*
 111          * The header or image contents need to be set as per image type to
 112          * be generated using this callback function.
 113          * further output file post processing (for ex. checksum calculation,
 114          * padding bytes etc..) can also be done in this callback function.
 115          */
 116         void (*set_header) (void *, struct stat *, int,
 117                                         struct image_tool_params *);
 118         /*
 119          * This function is used by the command to retrieve a component
 120          * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
 121          * <sub-image-name>).
 122          * Thus the code to extract a file from an image must be put here.
 123          *
 124          * Returns 0 if the file was successfully retrieved from the image,
 125          * or a negative value on error.
 126          */
 127         int (*extract_subimage)(void *, struct image_tool_params *);
 128         /*
 129          * Some image generation support for ex (default image type) supports
 130          * more than one type_ids, this callback function is used to check
 131          * whether input (-T <image_type>) is supported by registered image
 132          * generation/list low level code
 133          */
 134         int (*check_image_type) (uint8_t);
 135         /* This callback function will be executed if fflag is defined */
 136         int (*fflag_handle) (struct image_tool_params *);
 137         /*
 138          * This callback function will be executed for variable size record
 139          * It is expected to build this header in memory and return its length
 140          * and a pointer to it by using image_type_params.header_size and
 141          * image_type_params.hdr. The return value shall indicate if an
 142          * additional padding should be used when copying the data image
 143          * by returning the padding length.
 144          */
 145         int (*vrec_header) (struct image_tool_params *,
 146                 struct image_type_params *);
 147 };
 148
 149 /**
 150  * imagetool_get_type() - find the image type params for a given image type
 151  *
 152  * It scans all registers image type supports
 153  * checks the input type for each supported image type
 154  *
 155  * if successful,
 156  *     returns respective image_type_params pointer if success
 157  * if input type_id is not supported by any of image_type_support
 158  *     returns NULL
 159  */
 160 struct image_type_params *imagetool_get_type(int type);
 161
 162 /*
 163  * imagetool_verify_print_header() - verifies the image header
 164  *
 165  * Scan registered image types and verify the image_header for each
 166  * supported image type. If verification is successful, this prints
 167  * the respective header.
 168  *
 169  * @return 0 on success, negative if input image format does not match with
 170  * any of supported image types
 171  */
 172 int imagetool_verify_print_header(
 173         void *ptr,
 174         struct stat *sbuf,
 175         struct image_type_params *tparams,
 176         struct image_tool_params *params);
 177
 178 /**
 179  * imagetool_save_subimage - store data into a file
 180  * @file_name: name of the destination file
 181  * @file_data: data to be written
 182  * @file_len: the amount of data to store
 183  *
 184  * imagetool_save_subimage() store file_len bytes of data pointed by file_data
 185  * into the file name by file_name.
 186  *
 187  * returns:
 188  *     zero in case of success or a negative value if fail.
 189  */
 190 int imagetool_save_subimage(
 191         const char *file_name,
 192         ulong file_data,
 193         ulong file_len);
 194
 195 /**
 196  * imagetool_get_filesize() - Utility function to obtain the size of a file
 197  *
 198  * This function prints a message if an error occurs, showing the error that
 199  * was obtained.
 200  *
 201  * @params:     mkimage parameters
 202  * @fname:      filename to check
 203  * @return size of file, or -ve value on error
 204  */
 205 int imagetool_get_filesize(struct image_tool_params *params, const char *fname);
 206
 207 /*
 208  * There is a c file associated with supported image type low level code
 209  * for ex. default_image.c, fit_image.c
 210  */
 211
 212
 213 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
 214
 215 #define ___cat(a, b) a ## b
 216 #define __cat(a, b) ___cat(a, b)
 217
 218 /* we need some special handling for this host tool running eventually on
 219  * Darwin. The Mach-O section handling is a bit different than ELF section
 220  * handling. The differnces in detail are:
 221  *  a) we have segments which have sections
 222  *  b) we need a API call to get the respective section symbols */
 223 #if defined(__MACH__)
 224 #include <mach-o/getsect.h>
 225
 226 #define INIT_SECTION(name)  do {                                        \
 227                 unsigned long name ## _len;                             \
 228                 char *__cat(pstart_, name) = getsectdata("__TEXT",      \
 229                         #name, &__cat(name, _len));                     \
 230                 char *__cat(pstop_, name) = __cat(pstart_, name) +      \
 231                         __cat(name, _len);                              \
 232                 __cat(__start_, name) = (void *)__cat(pstart_, name);   \
 233                 __cat(__stop_, name) = (void *)__cat(pstop_, name);     \
 234         } while (0)
 235 #define SECTION(name)   __attribute__((section("__TEXT, " #name)))
 236
 237 struct image_type_params **__start_image_type, **__stop_image_type;
 238 #else
 239 #define INIT_SECTION(name) /* no-op for ELF */
 240 #define SECTION(name)   __attribute__((section(#name)))
 241
 242 /* We construct a table of pointers in an ELF section (pointers generally
 243  * go unpadded by gcc).  ld creates boundary syms for us. */
 244 extern struct image_type_params *__start_image_type[], *__stop_image_type[];
 245 #endif /* __MACH__ */
 246
 247 #if !defined(__used)
 248 # if __GNUC__ == 3 && __GNUC_MINOR__ < 3
 249 #  define __used                        __attribute__((__unused__))
 250 # else
 251 #  define __used                        __attribute__((__used__))
 252 # endif
 253 #endif
 254
 255 #define U_BOOT_IMAGE_TYPE( \
 256                 _id, \
 257                 _name, \
 258                 _header_size, \
 259                 _header, \
 260                 _check_params, \
 261                 _verify_header, \
 262                 _print_header, \
 263                 _set_header, \
 264                 _extract_subimage, \
 265                 _check_image_type, \
 266                 _fflag_handle, \
 267                 _vrec_header \
 268         ) \
 269         static struct image_type_params __cat(image_type_, _id) = \
 270         { \
 271                 .name = _name, \
 272                 .header_size = _header_size, \
 273                 .hdr = _header, \
 274                 .check_params = _check_params, \
 275                 .verify_header = _verify_header, \
 276                 .print_header = _print_header, \
 277                 .set_header = _set_header, \
 278                 .extract_subimage = _extract_subimage, \
 279                 .check_image_type = _check_image_type, \
 280                 .fflag_handle = _fflag_handle, \
 281                 .vrec_header = _vrec_header \
 282         }; \
 283         static struct image_type_params *SECTION(image_type) __used \
 284                 __cat(image_type_ptr_, _id) = &__cat(image_type_, _id)
 285
 286 #endif /* _IMAGETOOL_H_ */