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