[llvm] e895c52 - [Object] getBuildAttributes: check e_machine. NFC
Fangrui Song via llvm-commits
llvm-commits at lists.llvm.org
Thu Mar 14 21:55:27 PDT 2024
Author: Fangrui Song
Date: 2024-03-14T21:55:23-07:00
New Revision: e895c523b53c97c92a69ba0997e8904edd1e40a8
URL: https://github.com/llvm/llvm-project/commit/e895c523b53c97c92a69ba0997e8904edd1e40a8
DIFF: https://github.com/llvm/llvm-project/commit/e895c523b53c97c92a69ba0997e8904edd1e40a8.diff
LOG: [Object] getBuildAttributes: check e_machine. NFC
getBuildAttributes is only called for ARM/RISCV object files and
`SHT_ARM_ATTRIBUTES == SHT_RISCV_ATTRIBUTES`, so the following check
`Sec.sh_type == ELF::SHT_ARM_ATTRIBUTES || Sec.sh_type == ELF::SHT_RISCV_ATTRIBUTES`
is actually fine. But the convention is to guard such processor-specific
section type checks with an e_machine test.
Added:
Modified:
llvm/include/llvm/Object/ELFObjectFile.h
Removed:
################################################################################
diff --git a/llvm/include/llvm/Object/ELFObjectFile.h b/llvm/include/llvm/Object/ELFObjectFile.h
index c9227da65708cc..1e73de9f08c19d 100644
--- a/llvm/include/llvm/Object/ELFObjectFile.h
+++ b/llvm/include/llvm/Object/ELFObjectFile.h
@@ -389,25 +389,35 @@ template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
}
Error getBuildAttributes(ELFAttributeParser &Attributes) const override {
+ uint32_t Type;
+ switch (getEMachine()) {
+ case ELF::EM_ARM:
+ Type = ELF::SHT_ARM_ATTRIBUTES;
+ break;
+ case ELF::EM_RISCV:
+ Type = ELF::SHT_RISCV_ATTRIBUTES;
+ break;
+ default:
+ return Error::success();
+ }
+
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return SectionsOrErr.takeError();
-
for (const Elf_Shdr &Sec : *SectionsOrErr) {
- if (Sec.sh_type == ELF::SHT_ARM_ATTRIBUTES ||
- Sec.sh_type == ELF::SHT_RISCV_ATTRIBUTES) {
- auto ErrorOrContents = EF.getSectionContents(Sec);
- if (!ErrorOrContents)
- return ErrorOrContents.takeError();
-
- auto Contents = ErrorOrContents.get();
- if (Contents[0] != ELFAttrs::Format_Version || Contents.size() == 1)
- return Error::success();
-
- if (Error E = Attributes.parse(Contents, ELFT::TargetEndianness))
- return E;
- break;
- }
+ if (Sec.sh_type != Type)
+ continue;
+ auto ErrorOrContents = EF.getSectionContents(Sec);
+ if (!ErrorOrContents)
+ return ErrorOrContents.takeError();
+
+ auto Contents = ErrorOrContents.get();
+ if (Contents[0] != ELFAttrs::Format_Version || Contents.size() == 1)
+ return Error::success();
+
+ if (Error E = Attributes.parse(Contents, ELFT::TargetEndianness))
+ return E;
+ break;
}
return Error::success();
}
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