[PATCH] D84398: [yaml2obj] - Introduce a way to set default values when using ShOffset, ShName and ShSize fields.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.
grimar added reviewers: jhenderson, MaskRay.
Herald added subscribers: rupprecht, atanasyan, hiraditya, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.

For some fields it might be convenient to specify the `DEFAULT` as a value.
E.g. instead of:

0x18 is the standard entsize value.
-----------------------------------

EntSize: [[ENTSIZE=0x18]]

we could write just:
EntSize: [[ENTSIZE=DEFAULT]]

and just ignore the `EntSize` key, like it doesn'y exist at all.

This patch adds a support for the `DEFAULT` value for `ShOffset`,
`ShName` and `ShSize` fields. It also updates a test for llvm-readobj,
which can use the new feature now.

If the whole idea is fine, I'll post patches for another
fields we have that might benefit from this approach.


https://reviews.llvm.org/D84398

Files:
  llvm/lib/ObjectYAML/ELFYAML.cpp
  llvm/test/tools/llvm-readobj/ELF/mips-abiflags.test
  llvm/test/tools/yaml2obj/ELF/override-shname.yaml
  llvm/test/tools/yaml2obj/ELF/override-shoffset.yaml
  llvm/test/tools/yaml2obj/ELF/override-shsize.yaml

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