[sigrok-util.git] / firmware / saleae-logic16 / sigrok-fwextract-saleae-logic16

#!/usr/bin/python3
##
## This file is part of the sigrok-util project.
##
## Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, see <http://www.gnu.org/licenses/>.
##

import sys
import struct
import parseelf

class searcher:

    def reset(this, offs=0):
        if offs < 0 or offs > this.length:
            raise Exception('Reset past end of section')
        this.address = this.baseaddr + offs
        this.offset = offs

    def skip(this, cnt):
        if this.offset + cnt > this.length:
            raise Exception('Skip past end of section')
        this.address += cnt
        this.offset += cnt

    def peek(this, cnt, offs=0):
        if this.offset + offs + cnt > this.length:
            raise Exception('Peek past end of section')
        return this.data[this.offset + offs : this.offset + offs + cnt]

    def look_for(this, needle):
        pos = this.data.find(needle, this.offset)
        if pos < 0:
            raise Exception('Needle not found in haystack')
        this.skip(pos - this.offset)

    def __init__(this, data, addr):
        this.data = data
        this.baseaddr = addr
        this.length = len(data)
        this.reset()

def search_plt_32(plt, addr):
    plt.reset()
    plt.look_for(struct.pack('<BBI', 0xff, 0x25, addr))	# jmp *addr32
    return plt.address

def search_plt_64(plt, addr):
    plt.reset()
    while True:
        plt.look_for(b'\xff\x25')		# jmpq *offs32(%rip)
        offs = struct.unpack('<i', plt.peek(4, 2))[0]
        if plt.address + offs + 6 == addr:
            return plt.address
        plt.skip(2)

def find_hex_file_lines_constructor_32(text, hex_file_lines_got, got_plt):
    while True:
        text.look_for(b'\x8b\xbb')		# mov offs32(%ebx),%edi
        offs = struct.unpack('<i', text.peek(4, 2))[0]
        if got_plt + offs == hex_file_lines_got:
            text.skip(6)
            return
        text.skip(2)

def find_hex_file_lines_constructor_64(text, hex_file_lines_got):
    while True:
        text.look_for(b'\x48\x8b\x2d')		# mov offs32(%rip),%rbp
        offs = struct.unpack('<i', text.peek(4, 3))[0]
        if text.address + offs + 7 == hex_file_lines_got:
            text.skip(7)
            return
        text.skip(3)

def parse_hex_file_lines_constructor_32(text, basic_string_plt, got_plt, lines):
    cnt = len(lines)
    while cnt > 0:
        if text.peek(2) == b'\x8d\x45':		# lea offs8(%ebp),%eax
            text.skip(3)
        elif text.peek(2) == b'\x8d\x85':	# lea offs32(%ebp),%eax
            text.skip(6)
        if text.peek(1) == b'\xbe':		# mov $imm32,%esi
            text.skip(5)
        elif text.peek(2) == b'\x31\xf6':	# xor %esi,%esi
            text.skip(2)
        if text.peek(4) == b'\x89\x44\x24\x08':	# mov %eax,0x8(%esp)
            text.skip(4)
        if text.peek(2) == b'\x8d\x83':		# lea offs32(%ebx),%eax
            straddr = struct.unpack('<i', text.peek(4, 2))[0]
            text.skip(6)
            straddr += got_plt
        else:
            raise Exception('Expected lea offs32(%ebx),%eax @ ' +
                            ('0x%x' % text.address))
        if text.peek(4) == b'\x89\x44\x24\x04':	# mov %eax,0x4(%esp)
            text.skip(4)
        if text.peek(3) == b'\x89\x3c\x24':	# mov %edi,(%esp)
            offs = 0
            text.skip(3)
        elif text.peek(2) == b'\x8d\x47':	# lea offs8(%edi),%eax
            offs = struct.unpack('<b', text.peek(1, 2))[0]
            text.skip(3)
        elif text.peek(2) == b'\x8d\x87':	# lea offs32(%edi),%eax
            offs = struct.unpack('<i', text.peek(4, 2))[0]
            text.skip(6)
        else:
            raise Exception('Expected lea offs(%edi),%eax @ ' +
                            ('0x%x' % text.address))
        if offs < 0 or offs > (len(lines) << 2) or (offs & 3) != 0:
            raise Exception('Invalid offset %d' % offs)
        index = offs >> 2
        if lines[index] != 0:
            raise Exception('Line %d filled multiple times' % index)
        if text.peek(3) == b'\x89\x04\x24':	# mov %eax,(%esp)
            text.skip(3)
        if text.peek(1) == b'\xe8':		# call offs32
            offs = struct.unpack('<i', text.peek(4, 1))[0]
            text.skip(5)
            if text.address + offs != basic_string_plt:
                raise Exception('Expected call ZNSsC1EPKcRKSaIcE@plt @ ' +
                                ('0x%x' % text.address))
        else:
            raise Exception('Expected call ZNSsC1EPKcRKSaIcE@plt @ ' +
                            ('0x%x' % text.address))
        if straddr == 0:
            raise Exception('NULL pointer stored to index %d' % index)
        lines[index] = straddr
        cnt -= 1

def parse_hex_file_lines_constructor_64(text, basic_string_plt, lines):
    cnt = len(lines)
    while cnt > 0:
        if text.peek(1) == b'\xbb':		# mov $imm32,%ebx
            text.skip(5)
        elif text.peek(2) == b'\x31\xdb':	# xor %ebx,%ebx
            text.skip(2)
        if text.peek(4) == b'\x48\x8d\x54\x24':	# lea offs8(%rsp),%rdx
            text.skip(5)
        elif text.peek(4) == b'\x48\x8d\x94\x24': # lea offs32(%rsp),%rdx
            text.skip(8)
        if text.peek(3) == b'\x48\x8d\x35':	# lea offs32(%rip),%rsi
            straddr = struct.unpack('<i', text.peek(4, 3))[0]
            text.skip(7)
            straddr += text.address
        else:
            raise Exception('Expected lea offs(%rip),%rsi @ ' +
                            ('0x%x' % text.address))
        if text.peek(3) == b'\x48\x89\xef':	# mov %rbp,%rdi
            offs = 0
            text.skip(3)
        elif text.peek(3) == b'\x48\x8d\x7d':	# lea offs8(%rbp),%rdi
            offs = struct.unpack('<b', text.peek(1, 3))[0]
            text.skip(4)
        elif text.peek(3) == b'\x48\x8d\xbd':	# lea offs32(%rbp),%rdi
            offs = struct.unpack('<i', text.peek(4, 3))[0]
            text.skip(7)
        else:
            raise Exception('Expected lea offs(%rbp),%rdi @ ' +
                            ('0x%x' % text.address))
        if offs < 0 or offs > (len(lines) << 3) or (offs & 7) != 0:
            raise Exception('Invalid offset %d' % offs)
        index = offs >> 3
        if lines[index] != 0:
            raise Exception('Line %d filled multiple times' % index)
        if text.peek(1) == b'\xe8':		# callq offs32
            offs = struct.unpack('<i', text.peek(4, 1))[0]
            text.skip(5)
            if text.address + offs != basic_string_plt:
                raise Exception('Expected callq ZNSsC1EPKcRKSaIcE@plt @ ' +
                                ('0x%x' % text.address))
        else:
            raise Exception('Expected callq ZNSsC1EPKcRKSaIcE@plt @ ' +
                            ('0x%x' % text.address))
        if straddr == 0:
            raise Exception('NULL pointer stored to index %d' % index)
        lines[index] = straddr
        cnt -= 1

def find_reloc(elf, symname):
    for section, relocs in elf.relocs.items():
        if 'symbols' in relocs and symname in relocs['symbols']:
            symnum = relocs['symbols'][symname]['number']
            for reloc in relocs['relocs']:
                if reloc['r_sym'] == symnum:
                    return reloc
    raise Exception('Unable to find a relocation against ' + symname)

def ihex_to_binary(lines):
    chunks = {}
    for line in lines:
        if line[0] != ':':
            raise Exception('ihex line does not start with ":"')
        line = bytes.fromhex(line[1:])
        if (sum(bytearray(line)) & 0xff) != 0:
            raise Exception('Invalid checksum in ihex')
        (byte_count, address, rectype) = struct.unpack('>BHB', line[:4])
        (data, checksum) = struct.unpack('>%dsB' % (byte_count), line[4:])
        if rectype == 1 and byte_count == 0:
            pass
        elif rectype != 0 or byte_count == 0:
            raise Exception('Unexpected rectype %d with bytecount %d' %
                            (rectype, byte_count))
        elif address in chunks:
            raise Exception('Multiple ihex lines with address 0x%x' % address)
        else:
            chunks[address] = data
    blob = b''
    for address in sorted(iter(chunks)):
        if address < len(blob):
            raise Exception('Overlapping ihex chunks')
        elif address > len(blob):
            blob += b'\x00' * (address - len(blob))
        blob += chunks[address]
    return blob

def extract_fx2_firmware(elf, symname, filename):
    blob = elf.load_symbol(elf.dynsym[symname + 'Count'])
    count = struct.unpack('<I', blob)[0]
    got_plt = elf.find_section('.got.plt')['sh_addr']
    hex_file_lines_got = find_reloc(elf, symname)['r_offset']
    basic_string_got = find_reloc(elf, '_ZNSsC1EPKcRKSaIcE')['r_offset']
    pltsec = elf.find_section('.plt')
    plt = searcher(elf.read_section(pltsec), pltsec['sh_addr'])
    try:
        if elf.elf_wordsize == 64:
            basic_string_plt = search_plt_64(plt, basic_string_got)
        else:
            basic_string_plt = search_plt_32(plt, basic_string_got)
    except:
        raise Exception('Unable to find a PLT entry for _ZNSsC1EPKcRKSaIcE')
    textsec = elf.find_section('.text')
    text = searcher(elf.read_section(textsec), textsec['sh_addr'])
    while True:
        try:
            if elf.elf_wordsize == 64:
                find_hex_file_lines_constructor_64(text, hex_file_lines_got)
            else:
                find_hex_file_lines_constructor_32(text, hex_file_lines_got,
                                                   got_plt)
        except:
            raise Exception('Unable to find constructor for ' + symname)
        oldoffs = text.offset
        l = [0]*count
        try:
            if elf.elf_wordsize == 64:
                parse_hex_file_lines_constructor_64(text, basic_string_plt, l)
            else:
                parse_hex_file_lines_constructor_32(text, basic_string_plt,
                                                    got_plt, l)
            break
        except KeyError:
            text.reset(oldoffs)
    rodatasec = elf.find_section('.rodata')
    rodata = elf.read_section(rodatasec)
    lo = rodatasec['sh_addr']
    hi = lo + rodatasec['sh_size']
    for i in range(count):
        addr = l[i]
        if addr < lo or addr >= hi:
            raise Exception('Address 0x%x outside of .rodata section' % addr)
        l[i] = elf.get_name(addr - lo, rodata)
    blob = ihex_to_binary(l)
    f = open(filename, 'wb')
    f.write(blob)
    f.close()
    print("saved %d bytes to %s" % (len(blob), filename))

def extract_symbol(elf, symname, filename):
    blob = elf.load_symbol(elf.dynsym[symname])
    f = open(filename, 'wb')
    f.write(blob)
    f.close()
    print("saved %d bytes to %s" % (len(blob), filename))

def extract_bitstream(elf, lv):
    extract_symbol(elf, 'gLogic16Lv' + lv + 'CompressedBitstream',
                   'saleae-logic16-fpga-' + lv + '.bitstream')

def usage():
    print("sigrok-fwextract-saleae-logic16 <programfile>")
    sys.exit()


#
# main
#

if len(sys.argv) != 2:
    usage()

try:
    filename = sys.argv[1]
    elf = parseelf.elf(filename)
    if elf.ehdr['e_machine'] != 3 and elf.ehdr['e_machine'] != 62:
        raise Exception('Unsupported e_machine')
    extract_fx2_firmware(elf, 'gLogic16HexFileLines', 'saleae-logic16-fx2.fw')
    extract_bitstream(elf, '18')
    extract_bitstream(elf, '33')
except Exception as e:
    print("Error: %s" % str(e))
Commit	Line	Data
a5419fb5 MC	1	#!/usr/bin/python3
	2	##
	3	## This file is part of the sigrok-util project.
	4	##
	5	## Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
	6	##
	7	## This program is free software; you can redistribute it and/or modify
	8	## it under the terms of the GNU General Public License as published by
	9	## the Free Software Foundation; either version 3 of the License, or
	10	## (at your option) any later version.
	11	##
	12	## This program is distributed in the hope that it will be useful,
	13	## but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	## GNU General Public License for more details.
	16	##
	17	## You should have received a copy of the GNU General Public License
	18	## along with this program; if not, see <http://www.gnu.org/licenses/>.
	19	##
	20
	21	import sys
1b0c6828	22	import struct
a5419fb5 MC	23	import parseelf
a5419fb5 MC	24
1b0c6828 MC	25	class searcher:
1b0c6828 MC	26
08a979af	27	def reset(this, offs=0):
1b0c6828 MC	28	if offs < 0 or offs > this.length:
	29	raise Exception('Reset past end of section')
	30	this.address = this.baseaddr + offs
	31	this.offset = offs
	32
	33	def skip(this, cnt):
	34	if this.offset + cnt > this.length:
	35	raise Exception('Skip past end of section')
	36	this.address += cnt
	37	this.offset += cnt
	38
	39	def peek(this, cnt, offs=0):
	40	if this.offset + offs + cnt > this.length:
	41	raise Exception('Peek past end of section')
	42	return this.data[this.offset + offs : this.offset + offs + cnt]
	43
	44	def look_for(this, needle):
	45	pos = this.data.find(needle, this.offset)
	46	if pos < 0:
	47	raise Exception('Needle not found in haystack')
	48	this.skip(pos - this.offset)
	49
	50	def __init__(this, data, addr):
	51	this.data = data
	52	this.baseaddr = addr
	53	this.length = len(data)
	54	this.reset()
	55
	56	def search_plt_32(plt, addr):
	57	plt.reset()
	58	plt.look_for(struct.pack('<BBI', 0xff, 0x25, addr)) # jmp *addr32
	59	return plt.address
	60
	61	def search_plt_64(plt, addr):
	62	plt.reset()
	63	while True:
	64	plt.look_for(b'\xff\x25') # jmpq *offs32(%rip)
	65	offs = struct.unpack('<i', plt.peek(4, 2))[0]
	66	if plt.address + offs + 6 == addr:
	67	return plt.address
	68	plt.skip(2)
	69
	70	def find_hex_file_lines_constructor_32(text, hex_file_lines_got, got_plt):
	71	while True:
	72	text.look_for(b'\x8b\xbb') # mov offs32(%ebx),%edi
	73	offs = struct.unpack('<i', text.peek(4, 2))[0]
	74	if got_plt + offs == hex_file_lines_got:
	75	text.skip(6)
	76	return
	77	text.skip(2)
	78
	79	def find_hex_file_lines_constructor_64(text, hex_file_lines_got):
	80	while True:
	81	text.look_for(b'\x48\x8b\x2d') # mov offs32(%rip),%rbp
	82	offs = struct.unpack('<i', text.peek(4, 3))[0]
	83	if text.address + offs + 7 == hex_file_lines_got:
	84	text.skip(7)
	85	return
	86	text.skip(3)
	87
	88	def parse_hex_file_lines_constructor_32(text, basic_string_plt, got_plt, lines):
	89	cnt = len(lines)
	90	while cnt > 0:
	91	if text.peek(2) == b'\x8d\x45': # lea offs8(%ebp),%eax
92	text.skip(3)
93	elif text.peek(2) == b'\x8d\x85': # lea offs32(%ebp),%eax
94	text.skip(6)
95	if text.peek(1) == b'\xbe': # mov $imm32,%esi
96	text.skip(5)
97	elif text.peek(2) == b'\x31\xf6': # xor %esi,%esi
98	text.skip(2)
99	if text.peek(4) == b'\x89\x44\x24\x08': # mov %eax,0x8(%esp)
100	text.skip(4)
101	if text.peek(2) == b'\x8d\x83': # lea offs32(%ebx),%eax
102	straddr = struct.unpack('<i', text.peek(4, 2))[0]
103	text.skip(6)
104	straddr += got_plt
105	else:
08a979af	106	raise Exception('Expected lea offs32(%ebx),%eax @ ' +
1b0c6828 MC	107	('0x%x' % text.address))
	108	if text.peek(4) == b'\x89\x44\x24\x04': # mov %eax,0x4(%esp)
	109	text.skip(4)
	110	if text.peek(3) == b'\x89\x3c\x24': # mov %edi,(%esp)
	111	offs = 0
	112	text.skip(3)
	113	elif text.peek(2) == b'\x8d\x47': # lea offs8(%edi),%eax
	114	offs = struct.unpack('<b', text.peek(1, 2))[0]
	115	text.skip(3)
	116	elif text.peek(2) == b'\x8d\x87': # lea offs32(%edi),%eax
	117	offs = struct.unpack('<i', text.peek(4, 2))[0]
	118	text.skip(6)
	119	else:
08a979af	120	raise Exception('Expected lea offs(%edi),%eax @ ' +
1b0c6828 MC	121	('0x%x' % text.address))
	122	if offs < 0 or offs > (len(lines) << 2) or (offs & 3) != 0:
	123	raise Exception('Invalid offset %d' % offs)
	124	index = offs >> 2
	125	if lines[index] != 0:
	126	raise Exception('Line %d filled multiple times' % index)
	127	if text.peek(3) == b'\x89\x04\x24': # mov %eax,(%esp)
	128	text.skip(3)
	129	if text.peek(1) == b'\xe8': # call offs32
	130	offs = struct.unpack('<i', text.peek(4, 1))[0]
	131	text.skip(5)
	132	if text.address + offs != basic_string_plt:
08a979af	133	raise Exception('Expected call ZNSsC1EPKcRKSaIcE@plt @ ' +
1b0c6828 MC	134	('0x%x' % text.address))
1b0c6828 MC	135	else:
08a979af	136	raise Exception('Expected call ZNSsC1EPKcRKSaIcE@plt @ ' +
1b0c6828 MC	137	('0x%x' % text.address))
	138	if straddr == 0:
	139	raise Exception('NULL pointer stored to index %d' % index)
	140	lines[index] = straddr
	141	cnt -= 1
	142
	143	def parse_hex_file_lines_constructor_64(text, basic_string_plt, lines):
	144	cnt = len(lines)
	145	while cnt > 0:
	146	if text.peek(1) == b'\xbb': # mov $imm32,%ebx
	147	text.skip(5)
	148	elif text.peek(2) == b'\x31\xdb': # xor %ebx,%ebx
	149	text.skip(2)
	150	if text.peek(4) == b'\x48\x8d\x54\x24': # lea offs8(%rsp),%rdx
	151	text.skip(5)
	152	elif text.peek(4) == b'\x48\x8d\x94\x24': # lea offs32(%rsp),%rdx
	153	text.skip(8)
	154	if text.peek(3) == b'\x48\x8d\x35': # lea offs32(%rip),%rsi
	155	straddr = struct.unpack('<i', text.peek(4, 3))[0]
	156	text.skip(7)
	157	straddr += text.address
	158	else:
08a979af	159	raise Exception('Expected lea offs(%rip),%rsi @ ' +
1b0c6828 MC	160	('0x%x' % text.address))
	161	if text.peek(3) == b'\x48\x89\xef': # mov %rbp,%rdi
	162	offs = 0
	163	text.skip(3)
	164	elif text.peek(3) == b'\x48\x8d\x7d': # lea offs8(%rbp),%rdi
	165	offs = struct.unpack('<b', text.peek(1, 3))[0]
	166	text.skip(4)
	167	elif text.peek(3) == b'\x48\x8d\xbd': # lea offs32(%rbp),%rdi
	168	offs = struct.unpack('<i', text.peek(4, 3))[0]
	169	text.skip(7)
	170	else:
08a979af	171	raise Exception('Expected lea offs(%rbp),%rdi @ ' +
1b0c6828 MC	172	('0x%x' % text.address))
	173	if offs < 0 or offs > (len(lines) << 3) or (offs & 7) != 0:
	174	raise Exception('Invalid offset %d' % offs)
	175	index = offs >> 3
	176	if lines[index] != 0:
	177	raise Exception('Line %d filled multiple times' % index)
	178	if text.peek(1) == b'\xe8': # callq offs32
	179	offs = struct.unpack('<i', text.peek(4, 1))[0]
	180	text.skip(5)
	181	if text.address + offs != basic_string_plt:
08a979af	182	raise Exception('Expected callq ZNSsC1EPKcRKSaIcE@plt @ ' +
1b0c6828 MC	183	('0x%x' % text.address))
1b0c6828 MC	184	else:
08a979af	185	raise Exception('Expected callq ZNSsC1EPKcRKSaIcE@plt @ ' +
1b0c6828 MC	186	('0x%x' % text.address))
	187	if straddr == 0:
	188	raise Exception('NULL pointer stored to index %d' % index)
	189	lines[index] = straddr
	190	cnt -= 1
	191
	192	def find_reloc(elf, symname):
	193	for section, relocs in elf.relocs.items():
	194	if 'symbols' in relocs and symname in relocs['symbols']:
	195	symnum = relocs['symbols'][symname]['number']
	196	for reloc in relocs['relocs']:
	197	if reloc['r_sym'] == symnum:
	198	return reloc
08a979af	199	raise Exception('Unable to find a relocation against ' + symname)
1b0c6828 MC	200
	201	def ihex_to_binary(lines):
	202	chunks = {}
	203	for line in lines:
	204	if line[0] != ':':
	205	raise Exception('ihex line does not start with ":"')
	206	line = bytes.fromhex(line[1:])
	207	if (sum(bytearray(line)) & 0xff) != 0:
	208	raise Exception('Invalid checksum in ihex')
	209	(byte_count, address, rectype) = struct.unpack('>BHB', line[:4])
	210	(data, checksum) = struct.unpack('>%dsB' % (byte_count), line[4:])
	211	if rectype == 1 and byte_count == 0:
	212	pass
	213	elif rectype != 0 or byte_count == 0:
	214	raise Exception('Unexpected rectype %d with bytecount %d' %
	215	(rectype, byte_count))
	216	elif address in chunks:
	217	raise Exception('Multiple ihex lines with address 0x%x' % address)
	218	else:
	219	chunks[address] = data
	220	blob = b''
	221	for address in sorted(iter(chunks)):
	222	if address < len(blob):
	223	raise Exception('Overlapping ihex chunks')
	224	elif address > len(blob):
	225	blob += b'\x00' * (address - len(blob))
	226	blob += chunks[address]
	227	return blob
	228
	229	def extract_fx2_firmware(elf, symname, filename):
08a979af	230	blob = elf.load_symbol(elf.dynsym[symname + 'Count'])
1b0c6828 MC	231	count = struct.unpack('<I', blob)[0]
1b0c6828 MC	232	got_plt = elf.find_section('.got.plt')['sh_addr']
08a979af	233	hex_file_lines_got = find_reloc(elf, symname)['r_offset']
1b0c6828 MC	234	basic_string_got = find_reloc(elf, '_ZNSsC1EPKcRKSaIcE')['r_offset']
	235	pltsec = elf.find_section('.plt')
	236	plt = searcher(elf.read_section(pltsec), pltsec['sh_addr'])
	237	try:
	238	if elf.elf_wordsize == 64:
	239	basic_string_plt = search_plt_64(plt, basic_string_got)
	240	else:
	241	basic_string_plt = search_plt_32(plt, basic_string_got)
	242	except:
	243	raise Exception('Unable to find a PLT entry for _ZNSsC1EPKcRKSaIcE')
	244	textsec = elf.find_section('.text')
	245	text = searcher(elf.read_section(textsec), textsec['sh_addr'])
	246	while True:
	247	try:
	248	if elf.elf_wordsize == 64:
	249	find_hex_file_lines_constructor_64(text, hex_file_lines_got)
	250	else:
	251	find_hex_file_lines_constructor_32(text, hex_file_lines_got,
	252	got_plt)
	253	except:
08a979af	254	raise Exception('Unable to find constructor for ' + symname)
1b0c6828 MC	255	oldoffs = text.offset
	256	l = [0]*count
	257	try:
	258	if elf.elf_wordsize == 64:
	259	parse_hex_file_lines_constructor_64(text, basic_string_plt, l)
	260	else:
	261	parse_hex_file_lines_constructor_32(text, basic_string_plt,
	262	got_plt, l)
	263	break
	264	except KeyError:
	265	text.reset(oldoffs)
	266	rodatasec = elf.find_section('.rodata')
	267	rodata = elf.read_section(rodatasec)
	268	lo = rodatasec['sh_addr']
	269	hi = lo + rodatasec['sh_size']
	270	for i in range(count):
	271	addr = l[i]
	272	if addr < lo or addr >= hi:
	273	raise Exception('Address 0x%x outside of .rodata section' % addr)
	274	l[i] = elf.get_name(addr - lo, rodata)
	275	blob = ihex_to_binary(l)
	276	f = open(filename, 'wb')
	277	f.write(blob)
	278	f.close()
	279	print("saved %d bytes to %s" % (len(blob), filename))
	280
a5419fb5 MC	281	def extract_symbol(elf, symname, filename):
	282	blob = elf.load_symbol(elf.dynsym[symname])
	283	f = open(filename, 'wb')
	284	f.write(blob)
	285	f.close()
	286	print("saved %d bytes to %s" % (len(blob), filename))
	287
	288	def extract_bitstream(elf, lv):
08a979af UH	289	extract_symbol(elf, 'gLogic16Lv' + lv + 'CompressedBitstream',
08a979af UH	290	'saleae-logic16-fpga-' + lv + '.bitstream')
a5419fb5 MC	291
a5419fb5 MC	292	def usage():
231faffa	293	print("sigrok-fwextract-saleae-logic16 <programfile>")
a5419fb5 MC	294	sys.exit()
	295
	296
	297	#
	298	# main
	299	#
	300
	301	if len(sys.argv) != 2:
	302	usage()
	303
	304	try:
	305	filename = sys.argv[1]
	306	elf = parseelf.elf(filename)
1b0c6828 MC	307	if elf.ehdr['e_machine'] != 3 and elf.ehdr['e_machine'] != 62:
	308	raise Exception('Unsupported e_machine')
	309	extract_fx2_firmware(elf, 'gLogic16HexFileLines', 'saleae-logic16-fx2.fw')
a5419fb5 MC	310	extract_bitstream(elf, '18')
	311	extract_bitstream(elf, '33')
	312	except Exception as e:
	313	print("Error: %s" % str(e))