def read_segment_list_entry(f):
v = [ None ] * loaderlib.SIZEOF_SI
v[loaderlib.SI_TYPE] = persistence.read_uint8(f)
offset_value = persistence.read_uint32(f)
if offset_value == 0xFFFFFFFF: # Unsigned, special value.
offset_value = -1
v[loaderlib.SI_FILE_OFFSET] = offset_value
v[loaderlib.SI_DATA_LENGTH] = persistence.read_uint32(f)
v[loaderlib.SI_LENGTH] = persistence.read_uint32(f)
v[loaderlib.SI_ADDRESS] = persistence.read_uint32(f)
return v
def read_segment_list_entry(f):
v = [None] * loaderlib.SIZEOF_SI
v[loaderlib.SI_TYPE] = persistence.read_uint8(f)
offset_value = persistence.read_uint32(f)
if offset_value == 0xFFFFFFFF: # Unsigned, special value.
offset_value = -1
v[loaderlib.SI_FILE_OFFSET] = offset_value
v[loaderlib.SI_DATA_LENGTH] = persistence.read_uint32(f)
v[loaderlib.SI_LENGTH] = persistence.read_uint32(f)
v[loaderlib.SI_ADDRESS] = persistence.read_uint32(f)
return v
def read_SegmentBlock(f):
block = SegmentBlock()
bytes_to_read = struct.calcsize(SEGMENTBLOCK_PACK_FORMAT)
block.segment_id, block.segment_offset, block.address, block.length, block.flags, block.line_count, line_data_count = struct.unpack(SEGMENTBLOCK_PACK_FORMAT, f.read(bytes_to_read))
if line_data_count > 0:
if get_block_data_type(block) == DATA_TYPE_CODE:
block.line_data = [ None ] * line_data_count
for i in xrange(line_data_count):
type_id = persistence.read_uint8(f)
if type_id == SLD_INSTRUCTION:
block_offset = persistence.read_uint16(f)
block.line_data[i] = (type_id, block_offset)
elif type_id == SLD_EQU_LOCATION_RELATIVE:
block_offset = persistence.read_uint32(f)
block.line_data[i] = (type_id, block_offset)
elif type_id in (SLD_COMMENT_TRAILING, SLD_COMMENT_FULL_LINE):
text = persistence.read_string(f)
block.line_data[i] = (type_id, text)
return block
def read_SegmentBlock(f):
block = SegmentBlock()
bytes_to_read = struct.calcsize(SEGMENTBLOCK_PACK_FORMAT)
block.segment_id, block.segment_offset, block.address, block.length, block.flags, block.line_count, line_data_count = struct.unpack(
SEGMENTBLOCK_PACK_FORMAT, f.read(bytes_to_read))
if line_data_count > 0:
if get_block_data_type(block) == DATA_TYPE_CODE:
block.line_data = [None] * line_data_count
for i in range(line_data_count):
type_id = persistence.read_uint8(f)
if type_id == SLD_INSTRUCTION:
block_offset = persistence.read_uint16(f)
block.line_data[i] = (type_id, block_offset)
elif type_id == SLD_EQU_LOCATION_RELATIVE:
block_offset = persistence.read_uint32(f)
block.line_data[i] = (type_id, block_offset)
elif type_id in (SLD_COMMENT_TRAILING, SLD_COMMENT_FULL_LINE):
text = persistence.read_string(f)
block.line_data[i] = (type_id, text)
return block