The code in linker-utils/src/elf.rs wraps enum constants from object in newtypes. It's got hand-written and sometimes missing implementations of Debug and Display for each. I introduced a macro to generate the newtype as well as a sub-module that contains the constants of this form:

pub const GNU_LIBLIST: SectionType = SectionType(object::elf::SHT_GNU_LIBLIST);

This has a few benefits. There is less hand-written code to maintain. Human error in naming the constants is no longer possible. The macro also generates common inherent methods and trait implementations for all the newtypes. The other nice thing is that there are now far fewer results when searching for values of these enums. Also, it's possible to define constants not present in object, such as RISCV_ATTRIBUTES.

I used this new macro to introduce another newtype - SymbolType. I've shoehorned in a couple of Debug derivations which originally catalyzed this work. There are fewer opaque integers in debug output. Example:

InternalSymDefInfo {
    placement: SectionEnd(
        osid-34,
    ),
    name: "_TLS_MODULE_BASE_",
    elf_symbol_type: TLS,
},

One new dependency is required - paste - but it is lightweight, compile-time only dtolnayware that was already in the dependency closure.