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from typing import Optional, List, IO
from pathlib import Path
from . import elf
from .section import *
class Symbol:
header: elf.Symbol
name: Optional[str]
bind: int
type: int
visibility: int
addr: Optional[int]
used: int
section: Optional[Section]
def __init__(self, header: elf.Symbol, name: Optional[str]):
self.header = header
self.name = name
self.bind = elf.ST_BIND(header.st_info)
self.type = elf.ST_TYPE(header.st_info)
self.visibility = elf.ST_VISIBILITY(header.st_other)
self.size = header.st_size
self.object = None
self.addr = None
self.used = 0
self.section = None
self.object = None
def isSection(self):
return self.type == elf.STT_SECTION
def isObject(self):
return self.type == elf.STT_OBJECT
def isFile(self):
return self.type == elf.STT_FILE
def isBindLocal(self):
return self.bind == elf.STB_LOCAL
def isBindGlobal(self):
return self.bind == elf.STB_GLOBAL
def getSection(self):
fail("Symbol is not associated to any section")
class NullSymbol(Symbol):
def __init__(self, header: elf.Symbol):
super().__init__(header, None)
class UndefSymbol(Symbol):
reference: Optional[Symbol]
def __init__(self, header: elf.Symbol, name: Optional[str]):
super().__init__(header, name)
self.reference = None
def resolveAddress(self):
assert self.reference
self.reference.resolveAddress()
self.addr = self.reference.addr
def getSection(self):
assert self.reference
return self.reference.getSection()
class AbsoluteSymbol(Symbol):
address: int
def __init__(self, header: elf.Symbol, name: Optional[str], value: int):
super().__init__(header, name)
self.address = value
def resolveAddress(self):
self.addr = self.address
class OffsetSymbol(Symbol):
section: Section
offset: int
def __init__(self, header: elf.Symbol, name: Optional[str], section: Section, offset: int):
super().__init__(header, name)
self.section = section
self.offset = offset
def resolveAddress(self):
self.addr = self.section.addr + self.offset
def getSection(self):
return self.section
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