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ELF: Provide default implemenatations for simple functions. 

llvm-svn: 259157
This commit is contained in:
Rui Ueyama 2016-01-29 04:05:09 +00:00
parent 07390fedee
commit 012eb783b3
2 changed files with 26 additions and 41 deletions
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45
lld/ELF/Target.cpp
View File

@ -153,8 +153,6 @@ private:
class PPCTargetInfo final : public TargetInfo {
public:
PPCTargetInfo();
bool needsGot(uint32_t Type, const SymbolBody &S) const override;
bool needsPlt(uint32_t Type, const SymbolBody &S) const override;
void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
uint64_t SA, uint64_t ZA = 0,
uint8_t *PairedLoc = nullptr) const override;
@ -196,9 +194,7 @@ public:
class AMDGPUTargetInfo final : public TargetInfo {
public:
AMDGPUTargetInfo();
bool needsGot(uint32_t Type, const SymbolBody &S) const override;
bool needsPlt(uint32_t Type, const SymbolBody &S) const override;
AMDGPUTargetInfo() {}
void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
uint64_t SA, uint64_t ZA = 0,
uint8_t *PairedLoc = nullptr) const override;
@ -258,14 +254,31 @@ bool TargetInfo::needsCopyRel(uint32_t Type, const SymbolBody &S) const {
return false;
}
bool TargetInfo::isTlsLocalDynamicRel(unsigned Type) const {
return Type == TlsLocalDynamicRel;
}
bool TargetInfo::isTlsGlobalDynamicRel(unsigned Type) const {
return Type == TlsGlobalDynamicRel;
}
bool TargetInfo::isTlsDynRel(unsigned Type, const SymbolBody &S) const {
return false;
}
bool TargetInfo::isGotRelative(uint32_t Type) const { return false; }
bool TargetInfo::isHintRel(uint32_t Type) const { return false; }
bool TargetInfo::isRelRelative(uint32_t Type) const { return true; }
bool TargetInfo::isSizeRel(uint32_t Type) const { return false; }
bool TargetInfo::needsGot(uint32_t Type, const SymbolBody &S) const {
return false;
}
bool TargetInfo::needsPlt(uint32_t Type, const SymbolBody &S) const {
return false;
}
unsigned TargetInfo::relaxTls(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
uint64_t P, uint64_t SA,
const SymbolBody *S) const {
@ -908,12 +921,6 @@ static uint16_t applyPPCHighest(uint64_t V) { return V >> 48; }
static uint16_t applyPPCHighesta(uint64_t V) { return (V + 0x8000) >> 48; }
PPCTargetInfo::PPCTargetInfo() {}
bool PPCTargetInfo::needsGot(uint32_t Type, const SymbolBody &S) const {
return false;
}
bool PPCTargetInfo::needsPlt(uint32_t Type, const SymbolBody &S) const {
return false;
}
bool PPCTargetInfo::isRelRelative(uint32_t Type) const { return false; }
void PPCTargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
@ -1374,16 +1381,6 @@ void AArch64TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd,
}
}
AMDGPUTargetInfo::AMDGPUTargetInfo() {}
bool AMDGPUTargetInfo::needsGot(uint32_t Type, const SymbolBody &S) const {
return false;
}
bool AMDGPUTargetInfo::needsPlt(uint32_t Type, const SymbolBody &S) const {
return false;
}
// Implementing relocations for AMDGPU is low priority since most
// programs don't use relocations now. Thus, this function is not
// actually called (relocateOne is called for each relocation).

22
lld/ELF/Target.h
View File

@ -22,23 +22,11 @@ class SymbolBody;
class TargetInfo {
public:
uint64_t getVAStart() const;
bool isTlsLocalDynamicRel(unsigned Type) const {
return Type == TlsLocalDynamicRel;
}
bool isTlsGlobalDynamicRel(unsigned Type) const {
return Type == TlsGlobalDynamicRel;
}
bool isTlsLocalDynamicRel(unsigned Type) const;
bool isTlsGlobalDynamicRel(unsigned Type) const;
virtual unsigned getDynRel(unsigned Type) const { return Type; }
virtual bool isTlsDynRel(unsigned Type, const SymbolBody &S) const {
return false;
}
virtual bool isTlsDynRel(unsigned Type, const SymbolBody &S) const;
virtual unsigned getTlsGotRel(unsigned Type = -1) const { return TlsGotRel; }
virtual void writeGotHeader(uint8_t *Buf) const {}
virtual void writeGotPltHeader(uint8_t *Buf) const {}
virtual void writeGotPlt(uint8_t *Buf, uint64_t Plt) const {};
@ -66,8 +54,8 @@ public:
virtual bool isSizeRel(uint32_t Type) const;
virtual bool needsDynRelative(unsigned Type) const { return false; }
virtual bool needsGot(uint32_t Type, const SymbolBody &S) const = 0;
virtual bool needsPlt(uint32_t Type, const SymbolBody &S) const = 0;
virtual bool needsGot(uint32_t Type, const SymbolBody &S) const;
virtual bool needsPlt(uint32_t Type, const SymbolBody &S) const;
virtual void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
uint64_t P, uint64_t SA, uint64_t ZA = 0,
uint8_t *PairedLoc = nullptr) const = 0;