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#!/usr/bin/env python
from collections import namedtuple
import re
import sys
import struct
DATA = 0
DATA = 1
class Section(object):
DATA = 0
CODE = 1
STYP_NOLOAD = 0x0002
STYP_TEXT = 0x0020
STYP_DATA = 0x0040
STYP_BSS = 0x0080
def __init__(self, name, type, start, size, data=None):
self.name = name
self.type = type
self.start = start
self.size = size
self.data = data
@property
def flags(self):
if self.type == Section.DATA:
return Section.STYP_DATA if self.data else Section.STYP_BSS
else:
return Section.STYP_TEXT if self.data else Section.STYP_NOLOAD
class CalypsoCOFF(object):
F_RELFLG = 0x0001 # Relocation information stripped from the file
F_EXEC = 0x0002 # File is executable (i.e., no unresolved external references)
F_LNNO = 0x0004 # Line numbers stripped from the file
F_LSYMS = 0x0010 # Local symbols stripped from the file
F_LITTLE = 0x0100 # Little endian
def __init__(self, data_seg_base=0x80000000):
self.sections = {}
self.data_seg_base = data_seg_base
self.ver_magic = 0x00c1
self.tgt_magic = 0x0098
self.flags = \
CalypsoCOFF.F_RELFLG | \
CalypsoCOFF.F_EXEC | \
CalypsoCOFF.F_LNNO | \
CalypsoCOFF.F_LSYMS | \
CalypsoCOFF.F_LITTLE
def _data_pack(self, d):
return ''.join(struct.pack('<H', x) for x in d)
def save(self, filename):
# Formats
HDR_FILE = '<HHlllHHH'
HDR_SECTIONS = '<8sLLllllHHHcc'
# Optional header
oh = ''
# File header
fh = struct.pack(HDR_FILE,
self.ver_magic, # unsigned short f_ver_magic; /* version magic number */
len(self.sections), # unsigned short f_nscns; /* number of section */
0, # long f_timdat; /* time and date stamp */
0, # long f_symptr; /* file ptr to symbol table */
0, # long f_nsyms; /* number entries in the sym table */
len(oh), # unsigned short f_opthdr; /* size of optional header */
self.flags, # unsigned short f_flags; /* flags */
self.tgt_magic, # unsigned short f_tgt_magic; /* target magic number */
)
# File header size + #sections * sizeof(section header)
dptr = struct.calcsize(HDR_FILE) + len(oh) + len(self.sections) * struct.calcsize(HDR_SECTIONS)
# Section headers
sh = []
sd = []
sk = lambda x: self.data_seg_base + x.start if x.type==Section.DATA else x.start
for s in sorted(self.sections.values(), key=sk):
# Values
if s.type == Section.DATA:
mp = 0x80
sa = s.start
else:
mp = 0
sa = s.start
sptr = dptr if s.data else 0
# Header
sh.append(struct.pack(HDR_SECTIONS,
s.name, # char[8] s_name; /* 8-character null padded section name */
sa, # long int s_paddr; /* Physical address of section */
sa, # long int s_vaddr; /* Virtual address of section */
s.size, # long int s_size; /* Section size in bytes */
sptr, # long int s_scnptr; /* File pointer to raw data */
0, # long int s_relptr; /* File pointer to relocation entries */
0, # long int s_lnnoptr;/* File pointer to line number entries */
0, # unsigned short s_nreloc; /* Number of relocation entrie */
0, # unsigned short s_nlnno; /* Number of line number entries */
s.flags,# unsigned short s_flags; /* Flags (see ``Section header flags'') */
'\x00', # /
chr(mp),# char s_mempage;/* Memory page number */
))
# Data
if s.data:
sd.append(self._data_pack(s.data))
dptr += s.size * 2
# Write the thing
f = open(filename, 'wb')
f.write(fh)
f.write(oh)
f.write(''.join(sh))
f.write(''.join(sd))
f.close()
def add_section(self, name, type, addr, size, data=None):
self.sections[name] = Section(name, type, addr, size, data=data)
# ----------------------------------------------------------------------------
# Dump loading
# ----------------------------------------------------------------------------
RE_DUMP_HDR = re.compile(
r"^DSP dump: (\w*) \[([0-9a-fA-F]{5})-([0-9a-fA-F]{5})\]$"
)
def _file_strip_gen(f):
while True:
l = f.readline()
if not l:
return
yield l.strip()
def dump_load_section(fg, sa, ea):
data = []
ca = sa
for l in fg:
if not l:
break
ra = int(l[0:5], 16)
if ra != ca:
raise ValueError('Invalid dump address %05x != %05x', ra, ca)
v = l[8:].split()
if len(v) != 16:
raise ValueError('Invalid dump format')
v = [int(x,16) for x in v]
data.extend(v)
ca += 0x10
if ca != ea:
raise ValueError('Missing dump data %05x != %05x', ra, ea)
return data
def dump_load(filename):
# Open file
f = open(filename, 'r')
fg = _file_strip_gen(f)
# Scan line by line for a dump header line
sections = []
for l in fg:
m = RE_DUMP_HDR.match(l)
if not m:
continue
name = m.group(1)
sa = int(m.group(2), 16)
ea = int(m.group(3), 16) + 1
sections.append((
name, sa, ea,
dump_load_section(fg, sa, ea),
))
# Done
f.close()
return sections
# ----------------------------------------------------------------------------
# Main
# ----------------------------------------------------------------------------
def main(pname, dump_filename, out_filename):
# Section to place in the COFF
sections = [
# name type start size
('.regs', Section.DATA, 0x00000, 0x0060),
('.scratch', Section.DATA, 0x00060, 0x0020),
('.drom', Section.DATA, 0x09000, 0x5000),
('.pdrom', Section.CODE, 0x0e000, 0x2000),
('.prom0', Section.CODE, 0x07000, 0x7000),
('.prom1', Section.CODE, 0x18000, 0x8000),
('.prom2', Section.CODE, 0x28000, 0x8000),
('.prom3', Section.CODE, 0x38000, 0x2000),
('.daram0', Section.DATA, 0x00080, 0x0780),
('.api', Section.DATA, 0x00800, 0x2000),
('.daram1', Section.DATA, 0x02800, 0x4800),
]
# COFF name -> dump name
dump_mapping = {
# '.regs' : 'Registers',
'.drom' : 'DROM',
'.pdrom' : 'PDROM',
'.prom0' : 'PROM0',
'.prom1' : 'PROM1',
'.prom2' : 'PROM2',
'.prom3' : 'PROM3',
}
# Load the dump
dump_sections = dict([(s[0], s) for s in dump_load(dump_filename)])
# Create the COFF
coff = CalypsoCOFF()
# Add each section (with data if we have some)
for name, type, start, size in sections:
# Dumped data ?
d_data = None
if (name in dump_mapping) and (dump_mapping[name] in dump_sections):
d_name, d_sa, d_ea, d_data = dump_sections[dump_mapping[name]]
# Add sections
coff.add_section(name, type, start, size, d_data)
# Save result
coff.save(out_filename)
return 0
if __name__ == '__main__':
sys.exit(main(*sys.argv))
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