[PATCH] D135196: [AArch64][Windows] Add llvm-readobj support for save_any_reg unwind opcode.

[Eli Friedman via Phabricator via llvm-commits]

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This is primarily used for Arm64EC, but it could be used for other non-standard calling conventions.  The testcase is based on an Arm64EC thunk generated by MSVC.

The name save_any_reg comes from Microsoft documentation, but the full encoding isn't specified there; this is reverse-engineered from the behavior of the unwinder.  (Thanks to Martin Storsjö for his example of how to write simple unwinder testcases by directly calling RtlVirtualUnwind.)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135196

Files:
  llvm/test/tools/llvm-readobj/COFF/arm64-unwind-save_any_reg.s
  llvm/tools/llvm-readobj/ARMWinEHPrinter.cpp
  llvm/tools/llvm-readobj/ARMWinEHPrinter.h

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