[PATCH] D99551: [clang-offload-wrapper] Add standard notes for ELF offload images

[Vyacheslav Zakharin via Phabricator via cfe-commits]

vzakhari created this revision.
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This patch is a piece of D99360 <https://reviews.llvm.org/D99360>.

The patch adds ELF notes into SHT_NOTE sections of ELF offload images passed to clang-offload-wrapper.

The new notes use a null-terminated //"LLVMOMPOFFLOAD"// note name. There are currently three types of notes:

//VERSION//: a string (not null-terminated) representing the ELF offload image structure. The current version '1.0' does not put any restrictions on the structure of the image. If we ever need to come up with a common structure for ELF offload images (e.g. to be able to analyze the images in libomptarget in some standard way), then we will introduce new versions.
//PRODUCER//: a vendor specific name of the producing toolchain. Upstream LLVM uses //"LLVM"// (not null-terminated).
//PRODUCER_VERSION//: a vendor specific version of the producing toolchain. Upstream LLVM uses //LLVM_VERSION_STRING// with optional //<space> LLVM_REVISION//.

All three notes are not mandatory currently.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99551

Files:
  clang/test/Driver/Inputs/clang-offload-wrapper/elf32be
  clang/test/Driver/Inputs/clang-offload-wrapper/elf32le
  clang/test/Driver/Inputs/clang-offload-wrapper/elf64be
  clang/test/Driver/Inputs/clang-offload-wrapper/elf64le
  clang/test/Driver/clang-offload-wrapper.c
  clang/tools/clang-offload-wrapper/ClangOffloadWrapper.cpp
  llvm/include/llvm/BinaryFormat/ELF.h

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