lib/MC/MCELF.cpp

   1 //===- lib/MC/MCELF.cpp - MC ELF ------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements ELF object file writer information.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "MCELF.h"
  15 #include "llvm/MC/MCAssembler.h"
  16 #include "llvm/MC/MCELFSymbolFlags.h"
  17 #include "llvm/MC/MCFixupKindInfo.h"
  18 #include "llvm/Support/ELF.h"
  19 #include "llvm/Target/TargetAsmBackend.h"
  20
  21 namespace llvm {
  22
  23 void MCELF::SetBinding(MCSymbolData &SD, unsigned Binding) {
  24   assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
  25          Binding == ELF::STB_WEAK);
  26   uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift);
  27   SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift));
  28 }
  29
  30 unsigned MCELF::GetBinding(const MCSymbolData &SD) {
  31   uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
  32   assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
  33          Binding == ELF::STB_WEAK);
  34   return Binding;
  35 }
  36
  37 void MCELF::SetType(MCSymbolData &SD, unsigned Type) {
  38   assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
  39          Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
  40          Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
  41          Type == ELF::STT_TLS);
  42
  43   uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STT_Shift);
  44   SD.setFlags(OtherFlags | (Type << ELF_STT_Shift));
  45 }
  46
  47 unsigned MCELF::GetType(const MCSymbolData &SD) {
  48   uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift;
  49   assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
  50          Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
  51          Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
  52          Type == ELF::STT_TLS);
  53   return Type;
  54 }
  55
  56 void MCELF::SetVisibility(MCSymbolData &SD, unsigned Visibility) {
  57   assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
  58          Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
  59
  60   uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STV_Shift);
  61   SD.setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
  62 }
  63
  64 unsigned MCELF::GetVisibility(MCSymbolData &SD) {
  65   unsigned Visibility =
  66     (SD.getFlags() & (0xf << ELF_STV_Shift)) >> ELF_STV_Shift;
  67   assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
  68          Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
  69   return Visibility;
  70 }
  71
  72 }