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Feature/writeable code section #4

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merged 2 commits into from
Sep 19, 2023
Merged

Feature/writeable code section #4

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ec0e8bc
ElfBuilder: Support adding writeable code section
matan1008 Sep 19, 2023
5212a98
Reorder imports
matan1008 Sep 19, 2023
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14 changes: 7 additions & 7 deletions simpleelf/elf_builder.py
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Original file line number Diff line number Diff line change
@@ -1,10 +1,9 @@
from collections import namedtuple

from construct import Padding
from simpleelf.elf_consts import ELFCLASS32

from simpleelf.elf_structs import ElfStructs
from simpleelf import elf_consts
from simpleelf.elf_consts import ELFCLASS32
from simpleelf.elf_structs import ElfStructs


class ElfBuilder:
Expand Down Expand Up @@ -99,10 +98,11 @@ def add_section(self, type_, address, size, name, flags):
self._e_shnum += 1
self._sections.append(section)

def add_code_section(self, name, address, size):
self.add_section(self._structs.Elf_SectionType.SHT_PROGBITS, address,
size,
name, elf_consts.SHF_ALLOC | elf_consts.SHF_EXECINSTR)
def add_code_section(self, name: str, address: int, size: int, writeable: bool = False):
flags = elf_consts.SHF_ALLOC | elf_consts.SHF_EXECINSTR
if writeable:
flags |= elf_consts.SHF_WRITE
self.add_section(self._structs.Elf_SectionType.SHT_PROGBITS, address, size, name, flags)

def add_empty_data_section(self, name, address, size):
self.add_section(self._structs.Elf_SectionType.SHT_NOBITS, address,
Expand Down