namespace {
enum {
- // Shift value for STT_* flags. 7 possible values. 3 bits.
- ELF_STT_Shift = 0,
-
- // Shift value for STB_* flags. 4 possible values, 2 bits.
- ELF_STB_Shift = 3,
-
- // Shift value for STV_* flags. 4 possible values, 2 bits.
- ELF_STV_Shift = 5,
-
- // Shift value for STO_* flags. 3 bits. All the values are between 0x20 and
- // 0xe0, so we shift right by 5 before storing.
- ELF_STO_Shift = 7,
-
- // One bit.
- ELF_IsSignature_Shift = 10,
-
- // One bit.
- ELF_WeakrefUsedInReloc_Shift = 11,
-
- // One bit.
- ELF_UsedInReloc_Shift = 12,
-
- // One bit.
- ELF_BindingSet_Shift = 13
+ ELF_STT_Shift = 0, // Shift value for STT_* flags
+ ELF_STB_Shift = 4, // Shift value for STB_* flags
+ ELF_STV_Shift = 8, // Shift value for STV_* flags
+ ELF_STO_Shift = 10 // Shift value for STO_* flags
};
}
void MCSymbolELF::setBinding(unsigned Binding) const {
- setIsBindingSet();
- unsigned Val;
- switch (Binding) {
- default:
- llvm_unreachable("Unsupported Binding");
- case ELF::STB_LOCAL:
- Val = 0;
- break;
- case ELF::STB_GLOBAL:
- Val = 1;
- break;
- case ELF::STB_WEAK:
- Val = 2;
- break;
- case ELF::STB_GNU_UNIQUE:
- Val = 3;
- break;
- }
- uint32_t OtherFlags = getFlags() & ~(0x3 << ELF_STB_Shift);
- setFlags(OtherFlags | (Val << ELF_STB_Shift));
+ BindingSet = true;
+ assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
+ Binding == ELF::STB_WEAK || Binding == ELF::STB_GNU_UNIQUE);
+ uint32_t OtherFlags = getFlags() & ~(0xf << ELF_STB_Shift);
+ setFlags(OtherFlags | (Binding << ELF_STB_Shift));
}
unsigned MCSymbolELF::getBinding() const {
if (isBindingSet()) {
- uint32_t Val = (getFlags() & (0x3 << ELF_STB_Shift)) >> ELF_STB_Shift;
- switch (Val) {
- default:
- llvm_unreachable("Invalid value");
- case 0:
- return ELF::STB_LOCAL;
- case 1:
- return ELF::STB_GLOBAL;
- case 2:
- return ELF::STB_WEAK;
- case 3:
- return ELF::STB_GNU_UNIQUE;
- }
+ uint32_t Binding = (getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
+ assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
+ Binding == ELF::STB_WEAK || Binding == ELF::STB_GNU_UNIQUE);
+ return Binding;
}
if (isDefined())
}
void MCSymbolELF::setType(unsigned Type) const {
- unsigned Val;
- switch (Type) {
- default:
- llvm_unreachable("Unsupported Binding");
- case ELF::STT_NOTYPE:
- Val = 0;
- break;
- case ELF::STT_OBJECT:
- Val = 1;
- break;
- case ELF::STT_FUNC:
- Val = 2;
- break;
- case ELF::STT_SECTION:
- Val = 3;
- break;
- case ELF::STT_COMMON:
- Val = 4;
- break;
- case ELF::STT_TLS:
- Val = 5;
- break;
- case ELF::STT_GNU_IFUNC:
- Val = 6;
- break;
- }
- uint32_t OtherFlags = getFlags() & ~(0x7 << ELF_STT_Shift);
- setFlags(OtherFlags | (Val << ELF_STT_Shift));
+ assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
+ Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
+ Type == ELF::STT_COMMON || Type == ELF::STT_TLS ||
+ Type == ELF::STT_GNU_IFUNC);
+
+ uint32_t OtherFlags = getFlags() & ~(0xf << ELF_STT_Shift);
+ setFlags(OtherFlags | (Type << ELF_STT_Shift));
}
unsigned MCSymbolELF::getType() const {
- uint32_t Val = (getFlags() & (0x7 << ELF_STT_Shift)) >> ELF_STT_Shift;
- switch (Val) {
- default:
- llvm_unreachable("Invalid value");
- case 0:
- return ELF::STT_NOTYPE;
- case 1:
- return ELF::STT_OBJECT;
- case 2:
- return ELF::STT_FUNC;
- case 3:
- return ELF::STT_SECTION;
- case 4:
- return ELF::STT_COMMON;
- case 5:
- return ELF::STT_TLS;
- case 6:
- return ELF::STT_GNU_IFUNC;
- }
+ uint32_t Type = (getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift;
+ assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
+ Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
+ Type == ELF::STT_COMMON || Type == ELF::STT_TLS ||
+ Type == ELF::STT_GNU_IFUNC);
+ return Type;
}
+// Visibility is stored in the first two bits of st_other
+// st_other values are stored in the second byte of get/setFlags
void MCSymbolELF::setVisibility(unsigned Visibility) {
assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
return Visibility;
}
+// Other is stored in the last six bits of st_other
+// st_other values are stored in the second byte of get/setFlags
void MCSymbolELF::setOther(unsigned Other) {
- assert((Other & 0x1f) == 0);
- Other >>= 5;
- assert(Other <= 0x7);
- uint32_t OtherFlags = getFlags() & ~(0x7 << ELF_STO_Shift);
+ uint32_t OtherFlags = getFlags() & ~(0x3f << ELF_STO_Shift);
setFlags(OtherFlags | (Other << ELF_STO_Shift));
}
unsigned MCSymbolELF::getOther() const {
unsigned Other = (getFlags() & (0x3f << ELF_STO_Shift)) >> ELF_STO_Shift;
- return Other << 5;
+ return Other;
}
void MCSymbolELF::setUsedInReloc() const {
- uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_UsedInReloc_Shift);
- setFlags(OtherFlags | (1 << ELF_UsedInReloc_Shift));
+ UsedInReloc = true;
}
bool MCSymbolELF::isUsedInReloc() const {
- return getFlags() & (0x1 << ELF_UsedInReloc_Shift);
+ return UsedInReloc;
}
-void MCSymbolELF::setIsWeakrefUsedInReloc() const {
- uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_WeakrefUsedInReloc_Shift);
- setFlags(OtherFlags | (1 << ELF_WeakrefUsedInReloc_Shift));
-}
+void MCSymbolELF::setIsWeakrefUsedInReloc() const { WeakrefUsedInReloc = true; }
-bool MCSymbolELF::isWeakrefUsedInReloc() const {
- return getFlags() & (0x1 << ELF_WeakrefUsedInReloc_Shift);
-}
+bool MCSymbolELF::isWeakrefUsedInReloc() const { return WeakrefUsedInReloc; }
-void MCSymbolELF::setIsSignature() const {
- uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_IsSignature_Shift);
- setFlags(OtherFlags | (1 << ELF_IsSignature_Shift));
-}
+void MCSymbolELF::setIsSignature() const { IsSignature = true; }
-bool MCSymbolELF::isSignature() const {
- return getFlags() & (0x1 << ELF_IsSignature_Shift);
-}
-
-void MCSymbolELF::setIsBindingSet() const {
- uint32_t OtherFlags = getFlags() & ~(0x1 << ELF_BindingSet_Shift);
- setFlags(OtherFlags | (1 << ELF_BindingSet_Shift));
-}
-
-bool MCSymbolELF::isBindingSet() const {
- return getFlags() & (0x1 << ELF_BindingSet_Shift);
-}
+bool MCSymbolELF::isSignature() const { return IsSignature; }
}
projects / oota-llvm.git / blobdiff