diff --git a/llvm/include/llvm/Object/ELF.h b/llvm/include/llvm/Object/ELF.h
--- a/llvm/include/llvm/Object/ELF.h
+++ b/llvm/include/llvm/Object/ELF.h
@@ -392,6 +392,11 @@
   Expected<ArrayRef<T>> getSectionContentsAsArray(const Elf_Shdr &Sec) const;
   Expected<ArrayRef<uint8_t>> getSectionContents(const Elf_Shdr &Sec) const;
   Expected<ArrayRef<uint8_t>> getSegmentContents(const Elf_Phdr &Phdr) const;
+
+  /// Returns a vector of BBAddrMap structs corresponding to each function
+  /// within the text section that the SHT_LLVM_BB_ADDR_MAP section \p Sec
+  /// is associated with. If the current ELFFile is relocatable, a corresponding
+  /// \p RelaSec must be passed in as an argument.
   Expected<std::vector<BBAddrMap>>
   decodeBBAddrMap(const Elf_Shdr &Sec, const Elf_Shdr *RelaSec = nullptr) const;