[PATCH] D37960: [mips] Fix relocation record format and ELF header for N32 ABI

[Simon Atanasyan via Phabricator via llvm-commits]

atanasyan created this revision.
Herald added a subscriber: arichardson.

The N32 ABI uses RELA relocation format, do not use 3-in-1 relocation's encoding, and uses ELFCLASS32. This change passes the `IsN32` flag to the `MCAsmBackend` to distinguish usage of N32 ABI.

We still do not handle some cases like providing the `-target-abi=o32` command line option with the `mips64` target triple. That's why elf_header.s contains some "FIXME" strings. This case will be fixed in a separate patch.


Repository:
  rL LLVM

https://reviews.llvm.org/D37960

Files:
  lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
  lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
  lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
  lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
  lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h
  test/MC/Mips/cpsetup.s
  test/MC/Mips/elf_header.s
  test/MC/Mips/expansion-j-sym-pic.s
  test/MC/Mips/expansion-jal-sym-pic.s
  test/MC/Mips/reloc-directive.s

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