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LibELF: Relax restriction on allowed values of EI_OSABI to allow GNU

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This check is here to make sure we only try to load serenity binaries.
However, with -fprofile-instr-generate -fcoverage-mapping, clang
sets the EI_OSABI field to 3, for GNU. The instrumentation uses a lot of
retained COMDAT sections for coverage instrumentation that get the
SHF_GNU_RETAINED section header flag set on them, forcing llvm to set
the ABI to GNU.
This commit is contained in:
Andrew Kaster 2022-03-04 18:02:23 -07:00 • committed by Andreas Kling
parent 1a8b5ef80a
commit 435a263998
1 changed files with 3 additions and 2 deletions
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5
Userland/Libraries/LibELF/Validation.cpp
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@ -46,9 +46,10 @@ bool validate_elf_header(ElfW(Ehdr) const& elf_header, size_t file_size, bool ve
return false;
}
if (ELFOSABI_SYSV != elf_header.e_ident[EI_OSABI]) {
// NOTE: With Clang, -fprofile-instr-generate -fcoverage-mapping sets our ELF ABI Version to 3 b/c of SHF_GNU_RETAIN
if (ELFOSABI_SYSV != elf_header.e_ident[EI_OSABI] && ELFOSABI_LINUX != elf_header.e_ident[EI_OSABI]) {
if (verbose)
dbgln("File has unknown OS ABI ({}), expected SYSV(0)!", elf_header.e_ident[EI_OSABI]);
dbgln("File has unknown OS ABI ({}), expected SYSV(0) or GNU/Linux(3)!", elf_header.e_ident[EI_OSABI]);
return false;
}