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 SetBinding(MCSymbolData & SD,unsigned Binding)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 GetBinding(const MCSymbolData & SD)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 SetType(MCSymbolData & SD,unsigned Type)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 GetType(const MCSymbolData & SD)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 SetVisibility(MCSymbolData & SD,unsigned Visibility)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() & ~(0x3 << ELF_STV_Shift); 61 SD.setFlags(OtherFlags | (Visibility << ELF_STV_Shift)); 62 } 63 GetVisibility(MCSymbolData & SD)64 unsigned MCELF::GetVisibility(MCSymbolData &SD) { 65 unsigned Visibility = 66 (SD.getFlags() & (0x3 << 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 } 73