1 //===- lib/MC/MCSymbolELF.cpp ---------------------------------------------===// 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 #include "llvm/MC/MCAssembler.h" 11 #include "llvm/MC/MCSymbolELF.h" 12 #include "llvm/MC/MCELFSymbolFlags.h" 13 #include "llvm/MC/MCFixupKindInfo.h" 14 #include "llvm/Support/ELF.h" 15 16 namespace llvm { 17 18 void MCSymbolELF::setBinding(unsigned Binding) const { 19 BindingSet = true; 20 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 21 Binding == ELF::STB_WEAK || Binding == ELF::STB_GNU_UNIQUE); 22 uint32_t OtherFlags = getFlags() & ~(0xf << ELF_STB_Shift); 23 setFlags(OtherFlags | (Binding << ELF_STB_Shift)); 24 } 25 26 unsigned MCSymbolELF::getBinding() const { 27 if (isBindingSet()) { 28 uint32_t Binding = (getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift; 29 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 30 Binding == ELF::STB_WEAK || Binding == ELF::STB_GNU_UNIQUE); 31 return Binding; 32 } 33 34 if (isDefined()) 35 return ELF::STB_LOCAL; 36 if (isUsedInReloc()) 37 return ELF::STB_GLOBAL; 38 if (isSignature()) 39 return ELF::STB_LOCAL; 40 return ELF::STB_GLOBAL; 41 } 42 43 void MCSymbolELF::setType(unsigned Type) const { 44 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT || 45 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION || 46 Type == ELF::STT_COMMON || Type == ELF::STT_TLS || 47 Type == ELF::STT_GNU_IFUNC); 48 49 uint32_t OtherFlags = getFlags() & ~(0xf << ELF_STT_Shift); 50 setFlags(OtherFlags | (Type << ELF_STT_Shift)); 51 } 52 53 unsigned MCSymbolELF::getType() const { 54 uint32_t Type = (getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift; 55 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT || 56 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION || 57 Type == ELF::STT_COMMON || Type == ELF::STT_TLS || 58 Type == ELF::STT_GNU_IFUNC); 59 return Type; 60 } 61 62 // Visibility is stored in the first two bits of st_other 63 // st_other values are stored in the second byte of get/setFlags 64 void MCSymbolELF::setVisibility(unsigned Visibility) { 65 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL || 66 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED); 67 68 uint32_t OtherFlags = getFlags() & ~(0x3 << ELF_STV_Shift); 69 setFlags(OtherFlags | (Visibility << ELF_STV_Shift)); 70 } 71 72 unsigned MCSymbolELF::getVisibility() const { 73 unsigned Visibility = (getFlags() & (0x3 << ELF_STV_Shift)) >> ELF_STV_Shift; 74 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL || 75 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED); 76 return Visibility; 77 } 78 79 // Other is stored in the last six bits of st_other 80 // st_other values are stored in the second byte of get/setFlags 81 void MCSymbolELF::setOther(unsigned Other) { 82 uint32_t OtherFlags = getFlags() & ~(0x3f << ELF_STO_Shift); 83 setFlags(OtherFlags | (Other << ELF_STO_Shift)); 84 } 85 86 unsigned MCSymbolELF::getOther() const { 87 unsigned Other = (getFlags() & (0x3f << ELF_STO_Shift)) >> ELF_STO_Shift; 88 return Other; 89 } 90 91 void MCSymbolELF::setUsedInReloc() const { 92 UsedInReloc = true; 93 } 94 95 bool MCSymbolELF::isUsedInReloc() const { 96 return UsedInReloc; 97 } 98 99 void MCSymbolELF::setIsSignature() const { IsSignature = true; } 100 101 bool MCSymbolELF::isSignature() const { return IsSignature; } 102 } 103