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authorYangbo Lu <yangbo.lu@nxp.com>2019-06-19 11:12:19 +0800
committerPetr Štetiar <ynezz@true.cz>2019-07-26 08:09:16 +0200
commitdf0d555ea5a984ccfc2a493b63267a6e24d87c5b (patch)
tree7e5a5af51f54cb44744ce56515419ef2046d44b2
parent316c8b5503e54cdb3ee5bd3b5d81a3b7dd139294 (diff)
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layerscape: convert to python3 for rcw
Python 2.7 will not be maintained past 2020. Let's convert to python3 for rcw. Also drop byte swapping since TF-A had been already used which handled byte swapping instead. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
-rw-r--r--package/firmware/layerscape/ls-rcw/patches/0001-Disable-byte-swapping.patch44
-rw-r--r--package/firmware/layerscape/ls-rcw/patches/0001-rcw-support-byte-swapping-without-tclsh-tool.patch82
-rw-r--r--package/firmware/layerscape/ls-rcw/patches/0002-Convert-to-python3.patch504
3 files changed, 548 insertions, 82 deletions
diff --git a/package/firmware/layerscape/ls-rcw/patches/0001-Disable-byte-swapping.patch b/package/firmware/layerscape/ls-rcw/patches/0001-Disable-byte-swapping.patch
new file mode 100644
index 0000000000..2ea260bfd4
--- /dev/null
+++ b/package/firmware/layerscape/ls-rcw/patches/0001-Disable-byte-swapping.patch
@@ -0,0 +1,44 @@
+From ef78dc0683a7f5ae80b27878a8a2f91d504e3290 Mon Sep 17 00:00:00 2001
+From: Yangbo Lu <yangbo.lu@nxp.com>
+Date: Wed, 19 Jun 2019 10:50:29 +0800
+Subject: [PATCH 1/2] Disable byte swapping
+
+Because TF-A had already handled rcw byte swapping, the
+byte swapping in rcw could be dropped.
+
+Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
+---
+ Makefile | 4 ----
+ Makefile.inc | 1 -
+ 2 files changed, 5 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index f697241..837b69e 100644
+--- a/Makefile
++++ b/Makefile
+@@ -14,10 +14,6 @@ TCLSH := $(shell command -v tclsh 2> /dev/null)
+ VER = $(shell git describe --tags)
+
+ all install clean:
+-ifndef TCLSH
+- $(error "tclsh is not available. please install it.")
+- exit 1
+-endif
+ @for board in $(BOARDS); do \
+ $(MAKE) -C $$board $@ DESTDIR=$(DESTDIR)/$$board; \
+ done
+diff --git a/Makefile.inc b/Makefile.inc
+index 87639bc..7d9a3d3 100644
+--- a/Makefile.inc
++++ b/Makefile.inc
+@@ -17,7 +17,6 @@ targets = $(txt_sources:.txt=.bin) $(rcw_sources:.rcw=.bin) $(swap_sources)
+ $(RCW) -i $< -o $@
+
+ all: $(targets)
+- $(QSPI_SWAP_SCRIPT) $(QSPI_SWAP_LIST)
+
+ install: $(targets)
+ $(INSTALL) -d $(DESTDIR)
+--
+2.7.4
+
diff --git a/package/firmware/layerscape/ls-rcw/patches/0001-rcw-support-byte-swapping-without-tclsh-tool.patch b/package/firmware/layerscape/ls-rcw/patches/0001-rcw-support-byte-swapping-without-tclsh-tool.patch
deleted file mode 100644
index 08492dd479..0000000000
--- a/package/firmware/layerscape/ls-rcw/patches/0001-rcw-support-byte-swapping-without-tclsh-tool.patch
+++ /dev/null
@@ -1,82 +0,0 @@
-From c87a500c45f36ad248b1298d63e590d1d7e74f12 Mon Sep 17 00:00:00 2001
-From: Yangbo Lu <yangbo.lu@nxp.com>
-Date: Tue, 3 Jul 2018 11:06:47 +0800
-Subject: [PATCH] rcw: support byte swapping without tclsh tool
-
-Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
----
- Makefile | 4 ----
- byte_swap.py | 32 ++++++++++++++++++++++++++++++++
- qspi_swap.sh | 2 +-
- 3 files changed, 33 insertions(+), 5 deletions(-)
- create mode 100755 byte_swap.py
-
-diff --git a/Makefile b/Makefile
-index 9f0587e..393bb2c 100644
---- a/Makefile
-+++ b/Makefile
-@@ -13,10 +13,6 @@ TCLSH := $(shell command -v tclsh 2> /dev/null)
- VER = $(shell git describe --tags)
-
- all install clean:
--ifndef TCLSH
-- $(error "tclsh is not available. please install it.")
-- exit 1
--endif
- @for board in $(BOARDS); do \
- $(MAKE) -C $$board $@ DESTDIR=$(DESTDIR)/$$board; \
- done
-diff --git a/byte_swap.py b/byte_swap.py
-new file mode 100755
-index 0000000..386310e
---- /dev/null
-+++ b/byte_swap.py
-@@ -0,0 +1,32 @@
-+#!/usr/bin/env python
-+"""
-+Swap the 4/8 bytes endian except for PBI CRC
-+2016-10-9: Initial version
-+
-+Usage:
-+ ./byte_swap.py <file_name> <byte>
-+"""
-+import sys
-+
-+try:
-+ file_name = sys.argv[1]
-+ byte = int(sys.argv[2])
-+except:
-+ print("Usage: ./byte_swap.py <file_name> <byte>")
-+ print("E.g.: ./byte_swap.py rcw_1600.bin 8\n")
-+ exit
-+
-+with open(file_name,'rb') as file:
-+ tmp = file.read()
-+file.close()
-+
-+with open(file_name + '.swapped','wb') as file:
-+ for i in range(0, len(tmp) - 1, byte):
-+ if(tmp[i:i+4].encode('hex')) == "08610040":
-+ #print("PBI CRC command")
-+ file.write(tmp[i:i+8])
-+ break
-+ file.write(tmp[i:i+byte][::-1])
-+file.close()
-+
-+print("Swapped file: " + file_name + '.swapped')
-diff --git a/qspi_swap.sh b/qspi_swap.sh
-index 0b58e44..d23fd8b 100755
---- a/qspi_swap.sh
-+++ b/qspi_swap.sh
-@@ -9,7 +9,7 @@ do
- if [ "$board_name" = "$current_dir" ]; then
- if [ -e $filename ]; then
- swapped_file="$filename.swapped"
-- tclsh ../tools/byte_swap.tcl $filename $swapped_file 8
-+ ../byte_swap.py $filename 8
- fi
- fi
- done < $1
---
-1.7.1
-
diff --git a/package/firmware/layerscape/ls-rcw/patches/0002-Convert-to-python3.patch b/package/firmware/layerscape/ls-rcw/patches/0002-Convert-to-python3.patch
new file mode 100644
index 0000000000..8aa629dd85
--- /dev/null
+++ b/package/firmware/layerscape/ls-rcw/patches/0002-Convert-to-python3.patch
@@ -0,0 +1,504 @@
+From 7bd43eb9e5cdf2035793d50a31bf13052eb9812a Mon Sep 17 00:00:00 2001
+From: Yangbo Lu <yangbo.lu@nxp.com>
+Date: Wed, 19 Jun 2019 10:25:41 +0800
+Subject: [PATCH 2/2] Convert to python3
+
+Python 2.7 will not be maintained past 2020. Let's convert
+to python3 for rcw. Below were the changes of this patch.
+- Adapted print usage
+- Didn't use tab anymore
+- Handled str and bytes type separately
+- Other minor changes
+
+Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
+---
+ Makefile.inc | 2 +-
+ rcw.py | 144 +++++++++++++++++++++++++++++------------------------------
+ 2 files changed, 73 insertions(+), 73 deletions(-)
+
+diff --git a/Makefile.inc b/Makefile.inc
+index 7d9a3d3..8bee2be 100644
+--- a/Makefile.inc
++++ b/Makefile.inc
+@@ -1,6 +1,6 @@
+ DESTDIR = $(shell basename $(CURDIR))
+ INSTALL = install
+-PYTHON ?= python2
++PYTHON ?= python3
+ RCW = $(PYTHON) ../rcw.py
+ QSPI_SWAP_LIST = $(shell pwd)/../qspi_swap_list.txt
+ QSPI_SWAP_SCRIPT=$(shell pwd)/../qspi_swap.sh
+diff --git a/rcw.py b/rcw.py
+index e5cd28b..619770a 100755
+--- a/rcw.py
++++ b/rcw.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python2
++#!/usr/bin/env python3
+
+ # rcw.py -- compiles an RCW source file into an PBL/RCW binary
+
+@@ -95,7 +95,7 @@ from optparse import OptionParser, OptionGroup
+ class ordered_dict(dict):
+ def __init__(self, *args, **kwargs):
+ dict.__init__(self, *args, **kwargs)
+- self._order = self.keys()
++ self._order = list(self.keys())
+
+ def __setitem__(self, key, value):
+ dict.__setitem__(self, key, value)
+@@ -132,7 +132,7 @@ def crc32(data):
+
+ crc = 0xffffffff
+ for i in data:
+- crc = (crc << 8) ^ table[(crc >> 24) ^ ord(i)]
++ crc = (crc << 8) ^ table[(crc >> 24) ^ int(i)]
+ crc = crc & 0xffffffff
+
+ return crc
+@@ -187,7 +187,7 @@ def command_line():
+ options.output = '/dev/stdout'
+
+ if options.reverse and not options.rcwi:
+- print "Error: -r option requires --rcw"
++ print("Error: -r option requires --rcw")
+ sys.exit(1)
+
+ # Checks if the bits for the given field overlap those of another field that
+@@ -196,27 +196,27 @@ def check_for_overlap(name, begin, end):
+ global symbols
+
+ if name in symbols:
+- print 'Error: Duplicate bitfield definition for', name
++ print('Error: Duplicate bitfield definition for', name)
+ return
+
+ # Iterate over the list of symbols that have already been defined
+- for n, [b, e] in symbols.iteritems():
++ for n, [b, e] in symbols.items():
+ # check if either 'begin' or 'end' is inside an bitfield range
+ if (b <= begin <= e) or (b <= end <= e):
+- print 'Error: Bitfield', name, 'overlaps with', n
++ print('Error: Bitfield', name, 'overlaps with', n)
+
+ #
+ # Build a u-boot PBI section for SPI/SD/NAND boot
+-# refer: Chapter 10, u-boot of QorIQ_SDK_Infocenter.pdf
++# refer: Chapter 10, u-boot of QorIQ_SDK_Infocenter.pdf
+ #
+ # pre-cond 1: u-boot.xxd should be created
+ # how to create u-boot.xxd
+-# xxd u-boot.bin > u-boot.xxd1 && cut -d " " -f1-10 u-boot.xxd1 > u-boot.xxd && rm -f u-boot.xxd1
++# xxd u-boot.bin > u-boot.xxd1 && cut -d " " -f1-10 u-boot.xxd1 > u-boot.xxd && rm -f u-boot.xxd1
+ #
+ # rcw file should include spi_boot.rcw as well
+ #
+ def build_pbi_uboot(lines):
+- subsection = ''
++ subsection = b''
+ cnt = 1
+ l_tmp = []
+
+@@ -224,55 +224,55 @@ def build_pbi_uboot(lines):
+ for l in lines:
+ # prepare 0x40 per lines except the last one
+ # add flush at the end
+- lstr = l.split()
+- addr = int(lstr[0][:-1], 16)
++ lstr = l.split()
++ addr = int(lstr[0][:-1], 16)
+
+ # print l
+ #
+ # last two lines take 0x20 numbers
+ #
+- if ((cnt % 2 == 0) and (cnt > len(lines) -4)):
++ if ((cnt % 2 == 0) and (cnt > len(lines) -4)):
+ l_tmp.append(l)
+ b = []
+
+- for t in l_tmp:
++ for t in l_tmp:
+ lstr = t.split()
+
+- for i in range(1, len(lstr)):
++ for i in range(1, len(lstr)):
+ b.append(int(lstr[i], 16))
+
+ subsection += struct.pack('>LHHHHHHHHHHHHHHHH',\
+- 0x0C1F80000 + (addr - 0x10),\
+- b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],\
+- b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15])
++ 0x0C1F80000 + (addr - 0x10),\
++ b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],\
++ b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15])
+ l_tmp = []
+ #
+ # the rest of lines take 0x40 numbers
+ elif (cnt % 4 == 0):
+ l_tmp.append(l)
+- b = []
+- for t in l_tmp:
++ b = []
++ for t in l_tmp:
+ lstr = t.split()
+- for i in range(1, len(lstr)):
++ for i in range(1, len(lstr)):
+ b.append(int(lstr[i], 16))
+
+ subsection += struct.pack('>LHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH',\
+- 0x081F80000 + (addr - 0x30),\
+- b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],\
+- b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15],\
+- b[16], b[17], b[18], b[19], b[20], b[21], b[22], b[23], \
+- b[24], b[25], b[26], b[27], b[28], b[29], b[30], b[31])
++ 0x081F80000 + (addr - 0x30),\
++ b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],\
++ b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15],\
++ b[16], b[17], b[18], b[19], b[20], b[21], b[22], b[23], \
++ b[24], b[25], b[26], b[27], b[28], b[29], b[30], b[31])
+ l_tmp = []
+ else:
+ l_tmp.append(l)
+
+- cnt = cnt + 1
++ cnt = cnt + 1
+
+ return subsection
+
+ # Build a PBI section
+ def build_pbi(lines):
+- subsection = ''
++ subsection = b''
+ global vars
+
+ if 'pbiformat' in vars:
+@@ -286,9 +286,9 @@ def build_pbi(lines):
+ for l in lines:
+ # Check for an instruction without 0-2 parameters
+ # The + ' ' is a hack to make the regex work for just 'flush'
+- m = re.match(r'\s*([a-z]+)(|\.b1|\.b2|\.b4|\.short|\.long)\s*(?<=\s)([^,]*),?([^,]*),?([^,]*),?([^,]*)', l + ' ')
++ m = re.match(r'\s*([a-z]+)(|\.b1|\.b2|\.b4|\.short|\.long)\s*(?<=\s)([^,]*),?([^,]*),?([^,]*),?([^,]*)', l.decode("ascii") + ' ')
+ if not m:
+- print 'Unknown PBI subsection command "%s"' % l
++ print('Unknown PBI subsection command "%s"' % l)
+ return ''
+ op = m.group(1)
+ opsize = m.group(2)
+@@ -306,7 +306,7 @@ def build_pbi(lines):
+ p4 = eval(p4, {"__builtins__":None}, {}) if len(p4) else None
+ if op == 'wait':
+ if p1 == None:
+- print 'Error: "wait" instruction requires one parameter'
++ print('Error: "wait" instruction requires one parameter')
+ return ''
+ if pbiformat == 2:
+ v1 = struct.pack(endianess + 'L', 0x80820000 | p1)
+@@ -318,7 +318,7 @@ def build_pbi(lines):
+ subsection += v2
+ elif op == 'write':
+ if p1 == None or p2 == None:
+- print 'Error: "write" instruction requires two parameters'
++ print('Error: "write" instruction requires two parameters')
+ return ''
+ if pbiformat == 2:
+ v1 = struct.pack(endianess + 'L', (opsizebytes << 28) | p1)
+@@ -329,7 +329,7 @@ def build_pbi(lines):
+ subsection += v2
+ elif op == 'awrite':
+ if p1 == None or p2 == None:
+- print 'Error: "awrite" instruction requires two parameters'
++ print('Error: "awrite" instruction requires two parameters')
+ return ''
+ if pbiformat == 2:
+ v1 = struct.pack(endianess + 'L', 0x80000000 + (opsizebytes << 26) + p1)
+@@ -340,10 +340,10 @@ def build_pbi(lines):
+ subsection += v2
+ elif op == 'poll':
+ if pbiformat != 2:
+- print 'Error: "poll" not support for old PBI format'
++ print('Error: "poll" not support for old PBI format')
+ return ''
+ if p1 == None or p2 == None or p3 == None:
+- print 'Error: "poll" instruction requires three parameters'
++ print('Error: "poll" instruction requires three parameters')
+ return ''
+ if opsize == '.long':
+ cmd = 0x81
+@@ -357,19 +357,19 @@ def build_pbi(lines):
+ subsection += v3
+ elif op == 'loadacwindow':
+ if pbiformat != 2:
+- print 'Error: "loadacwindow" not supported for old PBI format'
++ print('Error: "loadacwindow" not supported for old PBI format')
+ return ''
+ if p1 == None:
+- print 'Error: "loadacwindow" instruction requires one parameter'
++ print('Error: "loadacwindow" instruction requires one parameter')
+ return ''
+ v1 = struct.pack(endianess + 'L', 0x80120000 + p1)
+ subsection += v1
+ elif op == 'blockcopy':
+ if pbiformat != 2:
+- print 'Error: "blockcopy" not supported for old PBI format'
++ print('Error: "blockcopy" not supported for old PBI format')
+ return ''
+ if p1 == None or p2 == None or p3 == None or p4 == None:
+- print 'Error: "blockcopy" instruction requires four parameters'
++ print('Error: "blockcopy" instruction requires four parameters')
+ return ''
+ v1 = struct.pack(endianess + 'L', 0x80000000 + (p1 & 0xff))
+ v2 = struct.pack(endianess + 'L', p2)
+@@ -382,7 +382,7 @@ def build_pbi(lines):
+ elif op == 'flush':
+ subsection += struct.pack('>LL', 0x09000000 | (int(vars['pbladdr'], 16) & 0x00ffff00), 0)
+ else:
+- print 'Unknown PBI subsection command "%s"' % l
++ print('Unknown PBI subsection command "%s"' % l)
+ return ''
+
+ return subsection
+@@ -394,7 +394,7 @@ def parse_subsection(header, lines):
+ elif header == "uboot":
+ return build_pbi_uboot(lines)
+
+- print 'Error: unknown subsection "%s"' % header
++ print('Error: unknown subsection "%s"' % header)
+ return ''
+
+ # Parse the .rcw file, one line at a time
+@@ -408,10 +408,10 @@ def parse_source_file(source):
+ symbols = ordered_dict()
+
+ in_subsection = False # True == we're in a subsection
+- pbi = ''
++ pbi = b''
+
+ for l2 in source:
+- l = re.sub(r'\s+', '', l2) # Remove all whitespace
++ l = re.sub(r'\s+', '', l2.decode("ascii")) # Remove all whitespace
+
+ if not len(l): # Skip blank or comment-only lines
+ continue
+@@ -466,14 +466,14 @@ def parse_source_file(source):
+ (name, value) = m.groups()
+ value = int(value, 0)
+ if not name in symbols:
+- print 'Error: Unknown bitfield', name
++ print('Error: Unknown bitfield', name)
+ else:
+ if options.warnings and (name in assignments):
+- print 'Warning: Duplicate assignment for bitfield', name
++ print('Warning: Duplicate assignment for bitfield', name)
+ assignments[name] = value
+ continue
+
+- print 'Error: unknown command', ' '.join(l2)
++ print('Error: unknown command', ' '.join(l2))
+
+ # Parse the -D command line parameter for additional bitfield assignments
+ def parse_cmdline_bitfields():
+@@ -484,12 +484,12 @@ def parse_cmdline_bitfields():
+ # This is the same regex as used in parse_source_file()
+ m = re.search(r'([A-Z0-9_]+)=([0-9a-zA-Z]+)', l)
+ if not m:
+- print 'Unrecognized command-line bitfield:', l
++ print('Unrecognized command-line bitfield:', l)
+ else:
+ (name, value) = m.groups()
+ value = int(value, 0)
+ if not name in symbols:
+- print 'Error: Unknown bitfield', name
++ print('Error: Unknown bitfield', name)
+ else:
+ # Don't bother printing a warning, since the command-line will
+ # normally be used to overwrite values in the .rcw file
+@@ -510,7 +510,7 @@ def read_source_file(filename):
+ global options
+
+ if not find_program('gcc'):
+- print 'Could not find gcc in PATH'
++ print('Could not find gcc in PATH')
+ return None
+
+ i = ['-I', '.'] # Always look in the current directory
+@@ -521,7 +521,7 @@ def read_source_file(filename):
+ shell=False, stdin=None, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+ ret = p.communicate()
+ if p.returncode != 0:
+- print ret[1],
++ print(ret[1],)
+ return None
+
+ return ret[0].splitlines()
+@@ -532,13 +532,13 @@ def check_vars():
+ global options
+
+ if not 'size' in vars:
+- print 'Error: "%size" variable must be specified'
++ print('Error: "%size" variable must be specified')
+ sys.exit(1)
+
+ if options.pbl:
+ if 'pbiformat' in vars and int(vars['pbiformat'], 0) == 2:
+ if 'sysaddr' in vars:
+- print 'Error: PBL format does not use %sysaddr'
++ print('Error: PBL format does not use %sysaddr')
+ sys.exit(1)
+ #if 'pbladdr' in vars:
+ # print 'Error: PBL format does not use %pbladdr'
+@@ -546,7 +546,7 @@ def check_vars():
+ else:
+ # If we want the PBL header/footer, the vars for those must be defined
+ if not 'sysaddr' in vars:
+- print 'Error: PBL format requires %sysaddr to be defined'
++ print('Error: PBL format requires %sysaddr to be defined')
+ sys.exit(1)
+
+ # Create a .bin file
+@@ -581,7 +581,7 @@ def create_binary():
+ dont64bswapcrc = 0
+ if 'dont64bswapcrc' in vars and int(vars['dont64bswapcrc'], 0):
+ dont64bswapcrc = 1
+- bits = 0L
++ bits = 0
+
+ # Magic hack. If a pbi is specified and we didn't set the size,
+ # set it for the new format!
+@@ -593,7 +593,7 @@ def create_binary():
+ pbilen += 2
+ assignments['PBI_LENGTH'] = pbilen
+
+- for n, v in assignments.iteritems():
++ for n, v in assignments.items():
+ # n = name of symbol
+ # v = value to assign
+ bb, ee = symbols[n] # First bit and last bit
+@@ -603,13 +603,13 @@ def create_binary():
+
+ # Make sure it's not too large
+ if v >= (1 << s):
+- print 'Error: Value', v, 'is too large for field', n
++ print('Error: Value', v, 'is too large for field', n)
+ continue
+
+ # If we treat the bitfield as "classic" numbered, reverse
+ # the value before adding it!
+ if b != bb:
+- v = int(bin(v)[2:].zfill(s)[::-1], 2)
++ v = int(bin(int(v))[2:].zfill(s)[::-1], 2)
+
+ # Set the bits. We assume that bits [b:e] are already zero. They can be
+ # non-zero only if we have overlapping bitfield definitions, which we
+@@ -617,7 +617,7 @@ def create_binary():
+ bits += v << ((size - 1) - e)
+
+ # Generate the binary. First, apply the preamble, if requested
+- binary = ''
++ binary = b''
+ if options.pbl:
+ # Starting with LS2, we have a larger field and a different
+ # format.
+@@ -626,7 +626,7 @@ def create_binary():
+ # Load RCW command
+ binary += struct.pack(endianess + 'L', 0x80100000)
+ else:
+- length_byte = (((size / 8) & 63) << 1) | 1
++ length_byte = (((size // 8) & 63) << 1) | 1
+ binary += struct.pack(endianess + 'L', (length_byte << 24) | (int(vars['sysaddr'], 16) & 0x00ffffff))
+
+ # Then convert 'bits' into an array of bytes
+@@ -634,7 +634,7 @@ def create_binary():
+ byte = bits >> i & 0xff
+ if classicbitnumbers:
+ byte = int(bin(byte)[2:].zfill(8)[::-1], 2)
+- binary += chr(byte)
++ binary += bytes([byte])
+
+ if options.pbl:
+ if pbiformat == 2:
+@@ -672,11 +672,11 @@ def create_binary():
+ # Precise bit any byte ordering of the CRC calculation is
+ # not clearly specified. This is empirical.
+ if classicbitnumbers:
+- newcrcbinary = ''
++ newcrcbinary = b''
+ for c in crcbinary:
+- byte = ord(c)
++ byte = int(c)
+ byte = int(bin(byte)[2:].zfill(8)[::-1], 2)
+- newcrcbinary += chr(byte)
++ newcrcbinary += bytes([byte])
+ crcbinary = newcrcbinary
+
+ # Calculate and add the CRC
+@@ -693,7 +693,7 @@ def create_binary():
+ l = len(binary)
+ if dont64bswapcrc and options.pbl:
+ l -= 8
+- newbinary = ''
++ newbinary = b''
+ for i in range(0, l, 8):
+ x64 = struct.unpack('>Q', binary[i:i + 8])[0]
+ newbinary += struct.pack('<Q', x64)
+@@ -771,7 +771,7 @@ def create_source():
+ # We skip the checksum field
+ pbi = binary[8 + (size / 8) + 4:]
+ else:
+- print 'Weird binary RCW format!'
++ print('Weird binary RCW format!')
+ bitbytes = ''
+ else:
+ if binary[0:4] == preambletst:
+@@ -780,7 +780,7 @@ def create_source():
+ bitbytes = rcw
+ pbi = binary[8 + (size / 8):]
+ else:
+- print 'Weird binary RCW format!'
++ print('Weird binary RCW format!')
+ bitbytes = ''
+ else:
+ bitbytes = binary
+@@ -827,16 +827,16 @@ def create_source():
+ bits &= ~(mask << shift)
+
+ if bits:
+- print 'Unknown bits in positions:',
++ print('Unknown bits in positions:',)
+ mask = 1
+ n = 0
+ while bits:
+ if (bits & mask):
+- print n,
++ print(n,)
+ n += 1
+ bits &= ~mask
+ mask <<= 1
+- print
++ print()
+
+ if len(pbi) > 0:
+ l = len(pbi)
+@@ -953,7 +953,7 @@ def create_source():
+ if cnt == 0:
+ cnt = 64
+ if i + cnt >= l:
+- print 'Error in write 0x%08x at offset %d within PBI\n' % (word, i)
++ print('Error in write 0x%08x at offset %d within PBI\n' % (word, i))
+ if (addr & 0x00ffff00 == pbladdr):
+ arg1 = struct.unpack(endianess + 'L', pbi[i:i+4])[0]
+ i += 4
+@@ -986,8 +986,8 @@ def create_source():
+
+ return source
+
+-if (sys.version_info < (2,6)) or (sys.version_info >= (3,0)):
+- print 'Only Python versions 2.6 or 2.7 are supported.'
++if (sys.version_info < (3,0)):
++ print('Only Python versions 3.0+ are supported.')
+ sys.exit(1)
+
+ # Make all 'print' statements output to stderr instead of stdout
+--
+2.7.4
+