text: // SPDX-License-Identifier: GPL-2.0+
  /*
   * (C) Copyright 2014
   * DENX Software Engineering
   * Heiko Schocher <hs@denx.de>
   *
   * (C) Copyright 2008 Semihalf
   *
   * (C) Copyright 2000-2004
   * DENX Software Engineering
   * Wolfgang Denk, wd@denx.de
   *
   * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
   *		FIT image specific code abstracted from mkimage.c
   *		some functions added to address abstraction
   *
   * All rights reserved.
   */
  
  #include "imagetool.h"
  #include "mkimage.h"
  #include "fit_common.h"
  #include <image.h>
  #include <u-boot/crc.h>
  
  int fit_verify_header(unsigned char *ptr, int image_size,
  			struct image_tool_params *params)
  {
  	if (fdt_check_header(ptr) != EXIT_SUCCESS || !fit_check_format(ptr))
  		return EXIT_FAILURE;
  
  	return EXIT_SUCCESS;
  }
  
  int fit_check_image_types(uint8_t type)
  {
  	if (type == IH_TYPE_FLATDT)
  		return EXIT_SUCCESS;
  	else
  		return EXIT_FAILURE;
  }
  
  int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
  	     void **blobp, struct stat *sbuf, bool delete_on_error,
  	     bool read_only)
  {
  	void *ptr;
  	int fd;
  
  	/* Load FIT blob into memory (we need to write hashes/signatures) */
  	fd = open(fname, (read_only ? O_RDONLY : O_RDWR) | O_BINARY);
  
  	if (fd < 0) {
  		fprintf(stderr, "%s: Can't open %s: %s\n",
  			cmdname, fname, strerror(errno));
  		goto err;
  	}
  
  	if (fstat(fd, sbuf) < 0) {
  		fprintf(stderr, "%s: Can't stat %s: %s\n",
  			cmdname, fname, strerror(errno));
  		goto err;
  	}
  
  	if (size_inc) {
  		sbuf->st_size += size_inc;
  		if (ftruncate(fd, sbuf->st_size)) {
  			fprintf(stderr, "%s: Can't expand %s: %s\n",
  				cmdname, fname, strerror(errno));
  		goto err;
  		}
  	}
  
  	errno = 0;
  	ptr = mmap(0, sbuf->st_size,
  		   (read_only ? PROT_READ : PROT_READ | PROT_WRITE), MAP_SHARED,
  		   fd, 0);
  	if ((ptr == MAP_FAILED) || (errno != 0)) {
  		fprintf(stderr, "%s: Can't read %s: %s\n",
  			cmdname, fname, strerror(errno));
  		goto err;
  	}
  
  	/* check if ptr has a valid blob */
  	if (fdt_check_header(ptr)) {
  		fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
  		goto err;
  	}
  
  	/* expand if needed */
  	if (size_inc) {
  		int ret;
  
  		ret = fdt_open_into(ptr, ptr, sbuf->st_size);
  		if (ret) {
  			fprintf(stderr, "%s: Cannot expand FDT: %s\n",
  				cmdname, fdt_strerror(ret));
  			goto err;
  		}
  	}
  
  	*blobp = ptr;
  	return fd;
  
  err:
  	if (fd >= 0)
  		close(fd);
  	if (delete_on_error)
  		unlink(fname);
  
  	return -1;
  }
  