import sys
import tempfile
-from elftools.elf.elffile import ELFFile
-from elftools.elf.sections import SymbolTableSection
+try:
+ import elftools
+ from elftools.elf.elffile import ELFFile
+ from elftools.elf.sections import SymbolTableSection
+except ImportError:
+ pass
+
+import coff
class ELFSymbol:
self._image = image
self._symbol = symbol
- @property
- def size(self):
- return self._symbol["st_size"]
-
- @property
- def value(self):
- data = self._image.get_section_data(self._symbol["st_shndx"])
- base = self._symbol["st_value"]
- return data[base:base + self.size]
-
@property
def string_value(self):
- value = self.value
+ size = self._symbol["st_size"]
+ value = self.get_value(0, size)
return value[:-1].decode() if value else ""
+ def get_value(self, offset, size):
+ section = self._symbol["st_shndx"]
+ data = self._image.get_section(section).data()
+ base = self._symbol["st_value"] + offset
+ return data[base : base + size]
+
class ELFImage:
def __init__(self, data):
+ version = tuple(int(c) for c in elftools.__version__.split("."))
+ self._legacy_elftools = version < (0, 24)
+
self._image = ELFFile(data)
- self._symtab = self._image.get_section_by_name(".symtab")
+
+ section = b".symtab" if self._legacy_elftools else ".symtab"
+ self._symtab = self._image.get_section_by_name(section)
if not isinstance(self._symtab, SymbolTableSection):
raise Exception(".symtab section is not a symbol table")
def is_big_endian(self):
return not self._image.little_endian
- def get_section_data(self, name):
- return self._image.get_section(name).data()
-
def find_by_name(self, name):
- symbol = self._symtab.get_symbol_by_name(name)
- return ELFSymbol(self, symbol[0]) if symbol else None
+ symbol = self._get_symbol_by_name(name)
+ return ELFSymbol(self._image, symbol[0]) if symbol else None
+
+ def _get_symbol_by_name(self, name):
+ if not self._legacy_elftools:
+ return self._symtab.get_symbol_by_name(name)
+ name = name.encode("utf-8")
+ for symbol in self._symtab.iter_symbols():
+ if symbol.name == name:
+ return [symbol]
+ return None
def find_by_prefix(self, prefix):
+ prefix = prefix.encode("utf-8") if self._legacy_elftools else prefix
for i in range(self._symtab.num_symbols()):
symbol = self._symtab.get_symbol(i)
if symbol.name.startswith(prefix):
- yield ELFSymbol(self, symbol)
+ yield ELFSymbol(self._image, symbol)
+
+
+class COFFSymbol:
+ def __init__(self, image, symbol):
+ self._image = image
+ self._symbol = symbol
+
+ def get_value(self, offset, size):
+ value = self._symbol.get_value(offset)
+ return value[:size] if value else value
+
+ @property
+ def string_value(self):
+ value = self._symbol.get_value(0)
+ return coff.decode_asciiz(value) if value else ''
+
+
+class COFFImage:
+ def __init__(self, data):
+ self._image = coff.Image(data)
+
+ @property
+ def is_big_endian(self):
+ return False
+
+ def find_by_prefix(self, prefix):
+ for symbol in self._image.symbols:
+ if symbol.name.startswith(prefix):
+ yield COFFSymbol(self._image, symbol)
+
+ def find_by_name(self, name):
+ for symbol in self._image.symbols:
+ if symbol.name == name:
+ return COFFSymbol(self._image, symbol)
+ return None
def define_rte_pci_id(is_big_endian):
rte_pci_id = define_rte_pci_id(image.is_big_endian)
- pci_id_size = ctypes.sizeof(rte_pci_id)
- pci_ids_desc = rte_pci_id * (table_symbol.size // pci_id_size)
- pci_ids = pci_ids_desc.from_buffer_copy(table_symbol.value)
result = []
- for pci_id in pci_ids:
+ while True:
+ size = ctypes.sizeof(rte_pci_id)
+ offset = size * len(result)
+ data = table_symbol.get_value(offset, size)
+ if not data:
+ break
+ pci_id = rte_pci_id.from_buffer_copy(data)
if not pci_id.device_id:
break
- result.append([
- pci_id.vendor_id,
- pci_id.device_id,
- pci_id.subsystem_vendor_id,
- pci_id.subsystem_device_id,
- ])
+ result.append(
+ [
+ pci_id.vendor_id,
+ pci_id.device_id,
+ pci_id.subsystem_vendor_id,
+ pci_id.subsystem_device_id,
+ ]
+ )
return result
def dump(self, file):
def parse_args():
parser = argparse.ArgumentParser()
- parser.add_argument("input", help="input object file path or '-' for stdin")
+ parser.add_argument("format", help="object file format, 'elf' or 'coff'")
+ parser.add_argument(
+ "input", nargs='+', help="input object file path or '-' for stdin"
+ )
parser.add_argument("output", help="output C file path or '-' for stdout")
return parser.parse_args()
return open(path, "rb")
+def read_input(path):
+ if path == "-":
+ return sys.stdin.buffer.read()
+ with open(path, "rb") as file:
+ return file.read()
+
+
+def load_image(fmt, path):
+ if fmt == "elf":
+ return ELFImage(open_input(path))
+ if fmt == "coff":
+ return COFFImage(read_input(path))
+ raise Exception("unsupported object file format")
+
+
def open_output(path):
if path == "-":
return sys.stdout
return open(path, "w")
+def write_header(output):
+ output.write(
+ "static __attribute__((unused)) const char *generator = \"%s\";\n" % sys.argv[0]
+ )
+
+
def main():
args = parse_args()
- infile = open_input(args.input)
- image = ELFImage(infile)
- drivers = load_drivers(image)
+ if args.input.count('-') > 1:
+ raise Exception("'-' input cannot be used multiple times")
+ if args.format == "elf" and "ELFFile" not in globals():
+ raise Exception("elftools module not found")
+
output = open_output(args.output)
- dump_drivers(drivers, output)
+ write_header(output)
+ for path in args.input:
+ image = load_image(args.format, path)
+ drivers = load_drivers(image)
+ dump_drivers(drivers, output)
if __name__ == "__main__":
git.droids-corp.org / dpdk.git / blobdiff