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 /*
  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
  34  */
  35 struct image_tool_params {
  36         int dflag;
  37         int eflag;
  38         int fflag;
  39         int iflag;
  40         int lflag;
  41         int pflag;
  42         int vflag;
  43         int xflag;
  44         int skipcpy;
  45         int os;
  46         int arch;
  47         int type;
  48         int comp;
  49         char *dtc;
  50         unsigned int addr;
  51         unsigned int ep;
  52         char *imagename;
  53         char *imagename2;
  54         char *datafile;
  55         char *imagefile;
  56         char *cmdname;
  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 */
  63         int orig_file_size;     /* Original size for file before padding */
  64         int fit_image_type;     /* Image type to put into the FIT */
  65 };
  66
  67 /*
  68  * image type specific variables and callback functions
  69  */
  70 struct image_type_params {
  71         /* name is an identification tag string for added support */
  72         char *name;
  73         /*
  74          * header size is local to the specific image type to be supported,
  75          * mkimage core treats this as number of bytes
  76          */
  77         uint32_t header_size;
  78         /* Image type header pointer */
  79         void *hdr;
  80         /*
  81          * There are several arguments that are passed on the command line
  82          * and are registered as flags in image_tool_params structure.
  83          * This callback function can be used to check the passed arguments
  84          * are in-lined with the image type to be supported
  85          *
  86          * Returns 1 if parameter check is successful
  87          */
  88         int (*check_params) (struct image_tool_params *);
  89         /*
  90          * This function is used by list command (i.e. mkimage -l <filename>)
  91          * image type verification code must be put here
  92          *
  93          * Returns 0 if image header verification is successful
  94          * otherwise, returns respective negative error codes
  95          */
  96         int (*verify_header) (unsigned char *, int, struct image_tool_params *);
  97         /* Prints image information abstracting from image header */
  98         void (*print_header) (const void *);
  99         /*
 100          * The header or image contents need to be set as per image type to
 101          * be generated using this callback function.
 102          * further output file post processing (for ex. checksum calculation,
 103          * padding bytes etc..) can also be done in this callback function.
 104          */
 105         void (*set_header) (void *, struct stat *, int,
 106                                         struct image_tool_params *);
 107         /*
 108          * This function is used by the command to retrieve a component
 109          * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
 110          * <sub-image-name>).
 111          * Thus the code to extract a file from an image must be put here.
 112          *
 113          * Returns 0 if the file was successfully retrieved from the image,
 114          * or a negative value on error.
 115          */
 116         int (*extract_subimage)(void *, struct image_tool_params *);
 117         /*
 118          * Some image generation support for ex (default image type) supports
 119          * more than one type_ids, this callback function is used to check
 120          * whether input (-T <image_type>) is supported by registered image
 121          * generation/list low level code
 122          */
 123         int (*check_image_type) (uint8_t);
 124         /* This callback function will be executed if fflag is defined */
 125         int (*fflag_handle) (struct image_tool_params *);
 126         /*
 127          * This callback function will be executed for variable size record
 128          * It is expected to build this header in memory and return its length
 129          * and a pointer to it by using image_type_params.header_size and
 130          * image_type_params.hdr. The return value shall indicate if an
 131          * additional padding should be used when copying the data image
 132          * by returning the padding length.
 133          */
 134         int (*vrec_header) (struct image_tool_params *,
 135                 struct image_type_params *);
 136 };
 137
 138 /**
 139  * imagetool_get_type() - find the image type params for a given image type
 140  *
 141  * It scans all registers image type supports
 142  * checks the input type for each supported image type
 143  *
 144  * if successful,
 145  *     returns respective image_type_params pointer if success
 146  * if input type_id is not supported by any of image_type_support
 147  *     returns NULL
 148  */
 149 struct image_type_params *imagetool_get_type(int type);
 150
 151 /*
 152  * imagetool_verify_print_header() - verifies the image header
 153  *
 154  * Scan registered image types and verify the image_header for each
 155  * supported image type. If verification is successful, this prints
 156  * the respective header.
 157  *
 158  * @return 0 on success, negative if input image format does not match with
 159  * any of supported image types
 160  */
 161 int imagetool_verify_print_header(
 162         void *ptr,
 163         struct stat *sbuf,
 164         struct image_type_params *tparams,
 165         struct image_tool_params *params);
 166
 167 /**
 168  * imagetool_save_subimage - store data into a file
 169  * @file_name: name of the destination file
 170  * @file_data: data to be written
 171  * @file_len: the amount of data to store
 172  *
 173  * imagetool_save_subimage() store file_len bytes of data pointed by file_data
 174  * into the file name by file_name.
 175  *
 176  * returns:
 177  *     zero in case of success or a negative value if fail.
 178  */
 179 int imagetool_save_subimage(
 180         const char *file_name,
 181         ulong file_data,
 182         ulong file_len);
 183
 184 /**
 185  * imagetool_get_filesize() - Utility function to obtain the size of a file
 186  *
 187  * This function prints a message if an error occurs, showing the error that
 188  * was obtained.
 189  *
 190  * @params:     mkimage parameters
 191  * @fname:      filename to check
 192  * @return size of file, or -ve value on error
 193  */
 194 int imagetool_get_filesize(struct image_tool_params *params, const char *fname);
 195
 196 /*
 197  * There is a c file associated with supported image type low level code
 198  * for ex. default_image.c, fit_image.c
 199  */
 200
 201
 202 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
 203
 204 #define ___cat(a, b) a ## b
 205 #define __cat(a, b) ___cat(a, b)
 206
 207 /* we need some special handling for this host tool running eventually on
 208  * Darwin. The Mach-O section handling is a bit different than ELF section
 209  * handling. The differnces in detail are:
 210  *  a) we have segments which have sections
 211  *  b) we need a API call to get the respective section symbols */
 212 #if defined(__MACH__)
 213 #include <mach-o/getsect.h>
 214
 215 #define INIT_SECTION(name)  do {                                        \
 216                 unsigned long name ## _len;                             \
 217                 char *__cat(pstart_, name) = getsectdata("__TEXT",      \
 218                         #name, &__cat(name, _len));                     \
 219                 char *__cat(pstop_, name) = __cat(pstart_, name) +      \
 220                         __cat(name, _len);                              \
 221                 __cat(__start_, name) = (void *)__cat(pstart_, name);   \
 222                 __cat(__stop_, name) = (void *)__cat(pstop_, name);     \
 223         } while (0)
 224 #define SECTION(name)   __attribute__((section("__TEXT, " #name)))
 225
 226 struct image_type_params **__start_image_type, **__stop_image_type;
 227 #else
 228 #define INIT_SECTION(name) /* no-op for ELF */
 229 #define SECTION(name)   __attribute__((section(#name)))
 230
 231 /* We construct a table of pointers in an ELF section (pointers generally
 232  * go unpadded by gcc).  ld creates boundary syms for us. */
 233 extern struct image_type_params *__start_image_type[], *__stop_image_type[];
 234 #endif /* __MACH__ */
 235
 236 #if !defined(__used)
 237 # if __GNUC__ == 3 && __GNUC_MINOR__ < 3
 238 #  define __used                        __attribute__((__unused__))
 239 # else
 240 #  define __used                        __attribute__((__used__))
 241 # endif
 242 #endif
 243
 244 #define U_BOOT_IMAGE_TYPE( \
 245                 _id, \
 246                 _name, \
 247                 _header_size, \
 248                 _header, \
 249                 _check_params, \
 250                 _verify_header, \
 251                 _print_header, \
 252                 _set_header, \
 253                 _extract_subimage, \
 254                 _check_image_type, \
 255                 _fflag_handle, \
 256                 _vrec_header \
 257         ) \
 258         static struct image_type_params __cat(image_type_, _id) = \
 259         { \
 260                 .name = _name, \
 261                 .header_size = _header_size, \
 262                 .hdr = _header, \
 263                 .check_params = _check_params, \
 264                 .verify_header = _verify_header, \
 265                 .print_header = _print_header, \
 266                 .set_header = _set_header, \
 267                 .extract_subimage = _extract_subimage, \
 268                 .check_image_type = _check_image_type, \
 269                 .fflag_handle = _fflag_handle, \
 270                 .vrec_header = _vrec_header \
 271         }; \
 272         static struct image_type_params *SECTION(image_type) __used \
 273                 __cat(image_type_ptr_, _id) = &__cat(image_type_, _id)
 274
 275 #endif /* _IMAGETOOL_H_ */