tools/fit_common.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2014
   4  * DENX Software Engineering
   5  * Heiko Schocher <hs@denx.de>
   6  *
   7  * (C) Copyright 2008 Semihalf
   8  *
   9  * (C) Copyright 2000-2004
  10  * DENX Software Engineering
  11  * Wolfgang Denk, wd@denx.de
  12  *
  13  * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
  14  *              FIT image specific code abstracted from mkimage.c
  15  *              some functions added to address abstraction
  16  *
  17  * All rights reserved.
  18  */
  19
  20 #include "imagetool.h"
  21 #include "mkimage.h"
  22 #include "fit_common.h"
  23 #include <image.h>
  24 #include <u-boot/crc.h>
  25
  26 int fit_verify_header(unsigned char *ptr, int image_size,
  27                         struct image_tool_params *params)
  28 {
  29         if (fdt_check_header(ptr) != EXIT_SUCCESS || !fit_check_format(ptr))
  30                 return EXIT_FAILURE;
  31
  32         return EXIT_SUCCESS;
  33 }
  34
  35 int fit_check_image_types(uint8_t type)
  36 {
  37         if (type == IH_TYPE_FLATDT)
  38                 return EXIT_SUCCESS;
  39         else
  40                 return EXIT_FAILURE;
  41 }
  42
  43 int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
  44              void **blobp, struct stat *sbuf, bool delete_on_error)
  45 {
  46         void *ptr;
  47         int fd;
  48
  49         /* Load FIT blob into memory (we need to write hashes/signatures) */
  50         fd = open(fname, O_RDWR | O_BINARY);
  51
  52         if (fd < 0) {
  53                 fprintf(stderr, "%s: Can't open %s: %s\n",
  54                         cmdname, fname, strerror(errno));
  55                 goto err;
  56         }
  57
  58         if (fstat(fd, sbuf) < 0) {
  59                 fprintf(stderr, "%s: Can't stat %s: %s\n",
  60                         cmdname, fname, strerror(errno));
  61                 goto err;
  62         }
  63
  64         if (size_inc) {
  65                 sbuf->st_size += size_inc;
  66                 if (ftruncate(fd, sbuf->st_size)) {
  67                         fprintf(stderr, "%s: Can't expand %s: %s\n",
  68                                 cmdname, fname, strerror(errno));
  69                 goto err;
  70                 }
  71         }
  72
  73         errno = 0;
  74         ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
  75         if ((ptr == MAP_FAILED) || (errno != 0)) {
  76                 fprintf(stderr, "%s: Can't read %s: %s\n",
  77                         cmdname, fname, strerror(errno));
  78                 goto err;
  79         }
  80
  81         /* check if ptr has a valid blob */
  82         if (fdt_check_header(ptr)) {
  83                 fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
  84                 goto err;
  85         }
  86
  87         /* expand if needed */
  88         if (size_inc) {
  89                 int ret;
  90
  91                 ret = fdt_open_into(ptr, ptr, sbuf->st_size);
  92                 if (ret) {
  93                         fprintf(stderr, "%s: Cannot expand FDT: %s\n",
  94                                 cmdname, fdt_strerror(ret));
  95                         goto err;
  96                 }
  97         }
  98
  99         *blobp = ptr;
 100         return fd;
 101
 102 err:
 103         if (fd >= 0)
 104                 close(fd);
 105         if (delete_on_error)
 106                 unlink(fname);
 107
 108         return -1;
 109 }