[PATCH] D158911: [BOLT] Support input binaries that use R_X86_GOTPC64

[Rafael Auler via Phabricator via llvm-commits]

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In large code model, the address of GOT is calculated by the
static linker via R_X86_GOTPC64 reloc applied against a MOVABSQ
instruction. In the final binary, it can be disassembled as a regular
immediate, but because such immediate is the result of PC-relative
pointer arithmetic, we need to parse this relocation and update this
calculation whenever we move code, otherwise we break the code trying
to read GOT.

A test case showing how GOT is accessed was provided.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158911

Files:
  bolt/include/bolt/Core/Relocation.h
  bolt/lib/Core/Relocation.cpp
  bolt/lib/Target/X86/X86MCPlusBuilder.cpp
  bolt/lib/Target/X86/X86MCSymbolizer.cpp
  bolt/lib/Target/X86/X86MCSymbolizer.h
  bolt/test/runtime/X86/gotoff-large-code-model.s

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