The elf package provide a sentinel error, ErrNoSymbols for the case
that Symbols or DynamicSymbols cannot return a symbol list because the
section is empty[1]. The same situation is handled in plan9obj by
returning a new error for this case[2-3]. For PE/Mach-O there is no
issue since access to the symbols is via direct access to a slice
field.
Because of this, it's either necessary to do an error string comparison
or re-call f.Section("syms") to check whether is was nil.
Would a PR to add a package var error reflecting the elf package
approach be acceptable?
thanks
Dan
[1]https://pkg.go.dev/debug/elf@go1.17#pkg-variables
[2]https://pkg.go.dev/debug/plan9obj@go1.17#pkg-variables
[3]
https://cs.opensource.google/go/go/+/refs/tags/go1.17:src/debug/plan9obj/file.go;l=308
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