ELF (LLVM Side)

// include/llvm/BinaryFormat/ELF.h

// Section flags.
enum : unsigned {
  // Section data should be writable during execution.
  SHF_WRITE = 0x1,

  // Section occupies memory during program execution.
  SHF_ALLOC = 0x2,

  // Section contains executable machine instructions.
  SHF_EXECINSTR = 0x4,

  // The data in this section may be merged.
  SHF_MERGE = 0x10,

  // The data in this section is null-terminated strings.
  SHF_STRINGS = 0x20,

  // A field in this section holds a section header table index.
  SHF_INFO_LINK = 0x40U,

  // Adds special ordering requirements for link editors.
  SHF_LINK_ORDER = 0x80U,

  // This section requires special OS-specific processing to avoid incorrect
  // behavior.
  SHF_OS_NONCONFORMING = 0x100U,

  // This section is a member of a section group.
  SHF_GROUP = 0x200U,

  // This section holds Thread-Local Storage.
  SHF_TLS = 0x400U,

  // Identifies a section containing compressed data.
  SHF_COMPRESSED = 0x800U,

  // This section is excluded from the final executable or shared library.
  SHF_EXCLUDE = 0x80000000U,

  // Start of target-specific flags.

  SHF_MASKOS = 0x0ff00000,

  // Bits indicating processor-specific flags.
  SHF_MASKPROC = 0xf0000000,

  /// All sections with the "d" flag are grouped together by the linker to form
  /// the data section and the dp register is set to the start of the section by
  /// the boot code.
  XCORE_SHF_DP_SECTION = 0x10000000,

  /// All sections with the "c" flag are grouped together by the linker to form
  /// the constant pool and the cp register is set to the start of the constant
  /// pool by the boot code.
  XCORE_SHF_CP_SECTION = 0x20000000,

  // If an object file section does not have this flag set, then it may not hold
  // more than 2GB and can be freely referred to in objects using smaller code
  // models. Otherwise, only objects using larger code models can refer to them.
  // For example, a medium code model object can refer to data in a section that
  // sets this flag besides being able to refer to data in a section that does
  // not set it; likewise, a small code model object can refer only to code in a
  // section that does not set this flag.
  SHF_X86_64_LARGE = 0x10000000,

  // All sections with the GPREL flag are grouped into a global data area
  // for faster accesses
  SHF_HEX_GPREL = 0x10000000,

  // Section contains text/data which may be replicated in other sections.
  // Linker must retain only one copy.
  SHF_MIPS_NODUPES = 0x01000000,

  // Linker must generate implicit hidden weak names.
  SHF_MIPS_NAMES = 0x02000000,

  // Section data local to process.
  SHF_MIPS_LOCAL = 0x04000000,

  // Do not strip this section.
  SHF_MIPS_NOSTRIP = 0x08000000,

  // Section must be part of global data area.
  SHF_MIPS_GPREL = 0x10000000,

  // This section should be merged.
  SHF_MIPS_MERGE = 0x20000000,

  // Address size to be inferred from section entry size.
  SHF_MIPS_ADDR = 0x40000000,

  // Section data is string data by default.
  SHF_MIPS_STRING = 0x80000000,

  // Make code section unreadable when in execute-only mode
  SHF_ARM_PURECODE = 0x20000000
};

// lib/Object/ELF.cpp

#define STRINGIFY_ENUM_CASE(ns, name)          \
  case ns::name:                               \
    return #name;

#define ELF_RELOC(name, value) STRINGIFY_ENUM_CASE(ELF, name)

StringRef llvm::object::getELFRelocationTypeName(uint32_t Machine,
                                                 uint32_t Type) {
  switch (Machine) {
   ...
   case ELF::EM_MIPS:
    switch (Type) {
#include "llvm/BinaryFormat/ELFRelocs/Mips.def"
    default:
      break;
    }
    break;
   ...