Nico Huber | ca41a6a | 2016-01-23 21:29:47 +0100 | [diff] [blame] | 1 | #!/usr/bin/env python2 |
Vadim Bendebury | a85a92d | 2014-04-07 13:36:48 -0700 | [diff] [blame] | 2 | # |
| 3 | # Copyright (c) 2013 The Linux Foundation. All rights reserved. |
| 4 | # |
| 5 | # Redistribution and use in source and binary forms, with or without |
| 6 | # modification, are permitted provided that the following conditions are met: |
| 7 | # |
| 8 | # 1. Redistributions of source code must retain the above copyright notice, |
| 9 | # this list of conditions and the following disclaimer. |
| 10 | # |
| 11 | # 2. Redistributions in binary form must reproduce the above copyright notice, |
| 12 | # this list of conditions and the following disclaimer in the documentation |
| 13 | # and/or other materials provided with the distribution. |
| 14 | # |
| 15 | # 3. Neither the name of the copyright holder nor the names of its |
| 16 | # contributors may be used to endorse or promote products derived from this |
| 17 | # software without specific prior written permission. |
| 18 | # |
| 19 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 20 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 23 | # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | # POSSIBILITY OF SUCH DAMAGE. |
| 30 | # |
| 31 | |
| 32 | import os |
| 33 | import struct |
| 34 | import sys |
| 35 | |
| 36 | PROG_NAME = os.path.basename(sys.argv[0]) |
| 37 | |
| 38 | def create_header(base, size): |
| 39 | """Returns a packed MBN header image with the specified base and size. |
| 40 | |
| 41 | @arg base: integer, specifies the image load address in RAM |
| 42 | @arg size: integer, specifies the size of the image |
| 43 | @returns: string, the MBN header |
| 44 | """ |
| 45 | |
| 46 | # SBLs require size to be 4 bytes aligned. |
| 47 | size = (size + 3) & 0xfffffffc |
| 48 | |
| 49 | # We currently do not support appending certificates. Signing GPL |
| 50 | # code might violate the GPL. So U-Boot will never be signed. So |
| 51 | # this is not required for U-Boot. |
| 52 | |
| 53 | header = [ |
| 54 | 0x5, # Type: APPSBL |
| 55 | 0x3, # Version: 3 |
| 56 | 0x0, # Image source pointer |
| 57 | base, # Image destination pointer |
| 58 | size, # Code Size + Cert Size + Signature Size |
| 59 | size, # Code Size |
| 60 | base + size, # Destination + Code Size |
| 61 | 0x0, # Signature Size |
| 62 | base + size, # Destination + Code Size + Signature Size |
| 63 | 0x0, # Cert Size |
| 64 | ] |
| 65 | |
| 66 | header_packed = struct.pack('<10I', *header) |
| 67 | return header_packed |
| 68 | |
| 69 | def mkheader(base_addr, infname, outfname): |
| 70 | """Prepends the image with the MBN header. |
| 71 | |
| 72 | @arg base_addr: integer, specifies the image load address in RAM |
| 73 | @arg infname: string, image filename |
| 74 | @arg outfname: string, output image with header prepended |
| 75 | @raises IOError: if reading/writing input/output file fails |
| 76 | """ |
| 77 | with open(infname, "rb") as infp: |
| 78 | image = infp.read() |
| 79 | insize = len(image) |
| 80 | |
| 81 | if base_addr > 0xFFFFFFFF: |
| 82 | raise ValueError("invalid base address") |
| 83 | |
| 84 | if base_addr + insize > 0xFFFFFFFF: |
| 85 | raise ValueError("invalid destination range") |
| 86 | |
| 87 | header = create_header(base_addr, insize) |
| 88 | with open(outfname, "wb") as outfp: |
| 89 | outfp.write(header) |
| 90 | outfp.write(image) |
| 91 | |
| 92 | def usage(msg=None): |
| 93 | """Print command usage. |
| 94 | |
| 95 | @arg msg: string, error message if any (default: None) |
| 96 | """ |
| 97 | if msg != None: |
| 98 | sys.stderr.write("%s: %s\n" % (PROG_NAME, msg)) |
| 99 | |
| 100 | print "Usage: %s <base-addr> <input-file> <output-file>" % PROG_NAME |
| 101 | |
| 102 | if msg != None: |
| 103 | exit(1) |
| 104 | |
| 105 | def main(): |
| 106 | """Main entry function""" |
| 107 | |
| 108 | if len(sys.argv) != 4: |
| 109 | usage("incorrect number of arguments") |
| 110 | |
| 111 | try: |
| 112 | base_addr = int(sys.argv[1], 0) |
| 113 | infname = sys.argv[2] |
| 114 | outfname = sys.argv[3] |
| 115 | except ValueError as e: |
| 116 | sys.stderr.write("mkheader: invalid base address '%s'\n" % sys.argv[1]) |
| 117 | exit(1) |
| 118 | |
| 119 | try: |
| 120 | mkheader(base_addr, infname, outfname) |
| 121 | except IOError as e: |
| 122 | sys.stderr.write("%s: %s\n" % (PROG_NAME, e)) |
| 123 | exit(1) |
| 124 | except ValueError as e: |
| 125 | sys.stderr.write("%s: %s\n" % (PROG_NAME, e)) |
| 126 | exit(1) |
| 127 | |
| 128 | if __name__ == "__main__": |
| 129 | main() |