[rtems-tools commit] Add a pure Python clone of mkimage written by Craig Barker.
Amar Takhar
amar at rtems.org
Wed Mar 4 23:35:00 UTC 2020
Module: rtems-tools
Branch: master
Commit: fc078dbdef36a05ae1bf6f2ae91a50ee4366a493
Changeset: http://git.rtems.org/rtems-tools/commit/?id=fc078dbdef36a05ae1bf6f2ae91a50ee4366a493
Author: Amar Takhar <verm at darkbeer.org>
Date: Tue Mar 3 19:58:25 2020 -0500
Add a pure Python clone of mkimage written by Craig Barker.
I emailed Craig Barker to ask if he would release his mkimage Python rewrite
as 2BSD. He graciously accepted and you can see his work here:
https://github.com/cmbarker83/pythonmkimage
This is a verbatim commit of 35d6d from his repository.
---
misc/tools/mkimage.py | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 139 insertions(+)
diff --git a/misc/tools/mkimage.py b/misc/tools/mkimage.py
new file mode 100644
index 0000000..ee57481
--- /dev/null
+++ b/misc/tools/mkimage.py
@@ -0,0 +1,139 @@
+# A quickly bashed together replacement for u-boot's mkimage written in python
+#
+# Copyright 2010 Craig Barker
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+
+from optparse import OptionParser
+from struct import *
+import sys
+import os.path
+import time
+import binascii
+
+MAGIC = 0x27051956
+IMG_NAME_LENGTH = 32
+
+archs = {'invalid':0, 'alpha':1, 'arm':2, 'x86':3, 'ia64':4, 'm68k':12,
+ 'microblaze':14, 'mips':5, 'mips64':6, 'nios':13, 'nios2':15,
+ 'powerpc':7, 'ppc':7, 's390':8, 'sh':9, 'sparc':10,
+ 'sparc64':11, 'blackfin':16, 'arv32':17, 'st200':18 }
+
+oss = {'invalid':0, 'openbsd':1, 'netbsd':2, 'freebsd':3, '4_4bsd':4,
+ 'linux':5, 'svr4':6, 'esix':7, 'solaris':8, 'irix':9,
+ 'sco':10, 'dell':11, 'ncr':12, 'lynos':13, 'vxworks':14,
+ 'psos':15, 'qnx':16, 'u-boot':17, 'rtems':18, 'artos':19,
+ 'unity':20, 'integrity':21 }
+
+types = {'invalid':0, 'standalone':1, 'kernel':2, 'ramdisk':3, 'multi':4,
+ 'firmware':5,'script':6, 'filesystem':7, 'flat_dt':8 }
+
+comps = {'none':0, 'bzip2':2, 'gzip':1, 'lzma':3 }
+
+usage = "usage: %prog [options] image"
+parser = OptionParser(usage=usage)
+parser.add_option("-A","--arch", dest="arch", default="powerpc",
+ help="set architecture to 'arch'", metavar="ARCH")
+parser.add_option("-O","--os", dest="os", default="linux",
+ help="set operating system to 'os'", metavar="OS")
+parser.add_option("-T","--type", dest="type", default="kernel",
+ help="set image type to 'type'", metavar="TYPE")
+parser.add_option("-C","--comp", dest="comp", default="gzip",
+ help="set compression type 'comp'", metavar="COMP")
+parser.add_option("-a","--addr", dest="addr", default="0",
+ help="set load address to 'addr' (hex)", metavar="ADDR")
+parser.add_option("-e","--ep", dest="ep", default="0",
+ help="set entry point to 'ep' (hex)", metavar="EP")
+parser.add_option("-n","--name", dest="name", default="",
+ help="set image name to 'name'", metavar="NAME")
+parser.add_option("-d","--datafile", dest="datafile",
+ help="use image data from 'datafile'", metavar="DATAFILE")
+parser.add_option("-x","--xip", action="store_true", dest="xip", default=False,
+ help="set XIP (execute in place)")
+
+(options, args) = parser.parse_args()
+
+if len(args) != 1: parser.print_help()
+
+if options.arch not in archs:
+ print "Invalid architecture specified, aborting"
+ sys.exit(2)
+
+if options.os not in oss:
+ print "Invalid operating system specified, aborting"
+ sys.exit(2)
+
+if options.comp not in comps:
+ print "Invalid compression specified, aborting"
+ sys.exit(2)
+
+if options.type not in types:
+ print "Invalid image type specified, aborting"
+ sys.exit(2)
+
+try:
+ inputsize = os.path.getsize(options.datafile)
+ inputfile = open(options.datafile, 'rb')
+
+except IOError:
+ print "Invalid datafile specified, aborting"
+ sys.exit(2)
+
+try:
+ outputfile = open(args[0],'wb')
+
+except IOError:
+ print "Error opening output file for writing, aborting"
+ sys.exit(1)
+
+struct = Struct("!IIIIIIIBBBB"+str(IMG_NAME_LENGTH)+"s")
+
+outputfile.seek(struct.size);
+
+inputcrc = 0;
+
+while True:
+ inputblock = inputfile.read(4096)
+ if not inputblock: break
+ inputcrc = binascii.crc32(inputblock, inputcrc)
+ outputfile.write(inputblock)
+
+inputcrc = inputcrc & 0xffffffff
+
+structdata = struct.pack(MAGIC, 0, int(time.time()), inputsize,
+ int(options.addr,16), int(options.ep,16), inputcrc,
+ oss[options.os], archs[options.arch], types[options.type],
+ comps[options.comp], options.name)
+
+headercrc = binascii.crc32(structdata) & 0xFFFFFFFF
+
+structdata = struct.pack(MAGIC, headercrc, int(time.time()), inputsize,
+ int(options.addr,16), int(options.ep,16), inputcrc,
+ oss[options.os], archs[options.arch], types[options.type],
+ comps[options.comp], options.name)
+
+outputfile.seek(0)
+outputfile.write(structdata)
+outputfile.close()
+inputfile.close()
More information about the vc
mailing list