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elf2efi: Add GNU_RELRO support

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This commit is contained in:
Jan Janssen
2023-09-28 17:54:35 +02:00
parent 79ae0d0b3e
commit 823bf39a49
2 changed files with 12 additions and 1 deletions
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11
tools/elf2efi.py
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@ -258,6 +258,13 @@ def iter_copy_sections(elf: ELFFile) -> typing.Iterator[PeSection]:
# manually, so that we can easily strip unwanted sections. We try to only discard things we know
# about so that there are no surprises.
relro = None
for elf_seg in elf.iter_segments():
if elf_seg["p_type"] == "PT_LOAD" and elf_seg["p_align"] != SECTION_ALIGNMENT:
raise RuntimeError("ELF segments are not properly aligned.")
elif elf_seg["p_type"] == "PT_GNU_RELRO":
relro = elf_seg
for elf_s in elf.iter_sections():
if (
elf_s["sh_flags"] & SH_FLAGS.SHF_ALLOC == 0
@ -275,6 +282,10 @@ def iter_copy_sections(elf: ELFFile) -> typing.Iterator[PeSection]:
else:
rwx = PE_CHARACTERISTICS_R
# PE images are always relro.
if relro and relro.section_in_segment(elf_s):
rwx = PE_CHARACTERISTICS_R
if pe_s and pe_s.Characteristics != rwx:
yield pe_s
pe_s = None