mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Giacomo Vercesi
942cf50735
Package revng's python code in two wheels: `revng` and `revng_internal`.
The revng wheel contains the
`revng.{pipeline_description,model,tupletree}` modules, while the
`revng_internal` one everything under `revng.internal`.
82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
#
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# This file is distributed under the MIT License. See LICENSE.md for details.
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#
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from pathlib import Path
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from typing import List, Union
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from elftools.elf.dynamic import DynamicSegment
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from elftools.elf.elffile import ELFFile
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def get_elf_needed(path: str) -> List[str]:
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with open(path, "rb") as elf_file:
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segments = [
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segment
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for segment in ELFFile(elf_file).iter_segments()
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if isinstance(segment, DynamicSegment)
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]
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if len(segments) != 1:
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return []
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needed = [
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to_string(tag.needed)
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for tag in segments[0].iter_tags()
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if tag.entry.d_tag == "DT_NEEDED"
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]
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elf_runpath: List[str] = [
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tag.runpath for tag in segments[0].iter_tags() if tag.entry.d_tag == "DT_RUNPATH"
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]
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assert len(elf_runpath) < 2
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if not elf_runpath:
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return needed
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runpaths = [
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runpath.replace("$ORIGIN", str(Path(path).parent))
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for runpath in elf_runpath[0].split(":")
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]
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absolute_needed = []
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for lib in needed:
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found = False
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for runpath in runpaths:
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full_path = Path(runpath) / lib
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if full_path.is_file():
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absolute_needed.append(str(full_path.resolve()))
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found = True
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break
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if not found:
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absolute_needed.append(lib)
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return absolute_needed
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def is_executable(path: str) -> bool:
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with open(path, "rb") as program:
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return program.read(4) == b"\x7fELF"
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def is_dynamic(path: str) -> bool:
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with open(path, "rb") as input_file:
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return (
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len(
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[
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segment
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for segment in ELFFile(input_file).iter_segments()
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if segment.header.p_type == "PT_DYNAMIC"
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]
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)
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!= 0
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)
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# Use in case different version of pyelftools might give str or bytes
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def to_string(obj: Union[str, bytes]) -> str:
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if isinstance(obj, str):
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return obj
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return obj.decode("utf-8")
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