130 lines
4.3 KiB
Python
Executable File
130 lines
4.3 KiB
Python
Executable File
#!/usr/bin/env python2
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#
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# Copyright (c) 2013 The Linux Foundation. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its
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# contributors may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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import os
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import struct
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import sys
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PROG_NAME = os.path.basename(sys.argv[0])
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def create_header(base, size):
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"""Returns a packed MBN header image with the specified base and size.
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@arg base: integer, specifies the image load address in RAM
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@arg size: integer, specifies the size of the image
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@returns: string, the MBN header
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"""
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# SBLs require size to be 4 bytes aligned.
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size = (size + 3) & 0xfffffffc
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# We currently do not support appending certificates. Signing GPL
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# code might violate the GPL. So U-Boot will never be signed. So
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# this is not required for U-Boot.
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header = [
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0x5, # Type: APPSBL
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0x3, # Version: 3
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0x0, # Image source pointer
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base, # Image destination pointer
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size, # Code Size + Cert Size + Signature Size
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size, # Code Size
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base + size, # Destination + Code Size
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0x0, # Signature Size
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base + size, # Destination + Code Size + Signature Size
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0x0, # Cert Size
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]
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header_packed = struct.pack('<10I', *header)
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return header_packed
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def mkheader(base_addr, infname, outfname):
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"""Prepends the image with the MBN header.
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@arg base_addr: integer, specifies the image load address in RAM
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@arg infname: string, image filename
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@arg outfname: string, output image with header prepended
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@raises IOError: if reading/writing input/output file fails
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"""
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with open(infname, "rb") as infp:
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image = infp.read()
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insize = len(image)
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if base_addr > 0xFFFFFFFF:
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raise ValueError("invalid base address")
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if base_addr + insize > 0xFFFFFFFF:
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raise ValueError("invalid destination range")
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header = create_header(base_addr, insize)
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with open(outfname, "wb") as outfp:
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outfp.write(header)
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outfp.write(image)
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def usage(msg=None):
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"""Print command usage.
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@arg msg: string, error message if any (default: None)
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"""
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if msg != None:
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sys.stderr.write("%s: %s\n" % (PROG_NAME, msg))
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print "Usage: %s <base-addr> <input-file> <output-file>" % PROG_NAME
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if msg != None:
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exit(1)
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def main():
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"""Main entry function"""
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if len(sys.argv) != 4:
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usage("incorrect number of arguments")
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try:
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base_addr = int(sys.argv[1], 0)
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infname = sys.argv[2]
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outfname = sys.argv[3]
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except ValueError as e:
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sys.stderr.write("mkheader: invalid base address '%s'\n" % sys.argv[1])
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exit(1)
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try:
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mkheader(base_addr, infname, outfname)
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except IOError as e:
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sys.stderr.write("%s: %s\n" % (PROG_NAME, e))
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exit(1)
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except ValueError as e:
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sys.stderr.write("%s: %s\n" % (PROG_NAME, e))
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exit(1)
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if __name__ == "__main__":
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main()
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