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Rename PltZeroEntrySize -> PltZeroSize. 

This patch also fixes parameter name. They points to the beginning
of PLT or GOT tables, so GotAddr or PltAddr are better.)

llvm-svn: 259150
This commit is contained in:
Rui Ueyama 2016-01-29 03:00:32 +00:00
parent 69c30edb5e
commit 6251545683
3 changed files with 49 additions and 49 deletions
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6
lld/ELF/OutputSections.cpp
View File

@ -193,7 +193,7 @@ template <class ELFT> void PltSection<ELFT>::writeTo(uint8_t *Buf) {
if (LazyReloc) {
// First write PLT[0] entry which is special.
Target->writePltZero(Buf, Out<ELFT>::GotPlt->getVA(), this->getVA());
Off += Target->PltZeroEntrySize;
Off += Target->PltZeroSize;
}
for (auto &I : Entries) {
const SymbolBody *E = I.first;
@ -219,13 +219,13 @@ template <class ELFT> void PltSection<ELFT>::addEntry(SymbolBody *Sym) {
template <class ELFT>
typename PltSection<ELFT>::uintX_t
PltSection<ELFT>::getEntryAddr(const SymbolBody &B) const {
return this->getVA() + Target->PltZeroEntrySize +
return this->getVA() + Target->PltZeroSize +
B.PltIndex * Target->PltEntrySize;
}
template <class ELFT> void PltSection<ELFT>::finalize() {
this->Header.sh_size =
Target->PltZeroEntrySize + Entries.size() * Target->PltEntrySize;
Target->PltZeroSize + Entries.size() * Target->PltEntrySize;
}
template <class ELFT>

86
lld/ELF/Target.cpp
View File

@ -90,8 +90,8 @@ public:
unsigned getTlsGotRel(unsigned Type) const override;
bool isTlsDynRel(unsigned Type, const SymbolBody &S) const override;
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -124,8 +124,8 @@ public:
bool isTlsDynRel(unsigned Type, const SymbolBody &S) const override;
void writeGotPltHeader(uint8_t *Buf) const override;
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -156,8 +156,8 @@ class PPCTargetInfo final : public TargetInfo {
public:
PPCTargetInfo();
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -173,8 +173,8 @@ class PPC64TargetInfo final : public TargetInfo {
public:
PPC64TargetInfo();
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -191,8 +191,8 @@ public:
AArch64TargetInfo();
unsigned getDynRel(unsigned Type) const override;
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -210,8 +210,8 @@ class AMDGPUTargetInfo final : public TargetInfo {
public:
AMDGPUTargetInfo();
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -228,8 +228,8 @@ public:
unsigned getDynRel(unsigned Type) const override;
void writeGotHeader(uint8_t *Buf) const override;
void writeGotPlt(uint8_t *Buf, uint64_t Plt) const override;
void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const override;
void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const override;
void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
unsigned RelOff) const override;
@ -313,7 +313,7 @@ X86TargetInfo::X86TargetInfo() {
TlsOffsetRel = R_386_TLS_DTPOFF32;
UseLazyBinding = true;
PltEntrySize = 16;
PltZeroEntrySize = 16;
PltZeroSize = 16;
}
void X86TargetInfo::writeGotPltHeader(uint8_t *Buf) const {
@ -348,8 +348,8 @@ bool X86TargetInfo::isTlsDynRel(unsigned Type, const SymbolBody &S) const {
return Type == R_386_TLS_GD;
}
void X86TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {
void X86TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {
// Executable files and shared object files have
// separate procedure linkage tables.
if (Config->Shared) {
@ -368,8 +368,8 @@ void X86TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
0x90, 0x90, 0x90, 0x90 // nop;nop;nop;nop
};
memcpy(Buf, PltData, sizeof(PltData));
write32le(Buf + 2, GotEntryAddr + 4); // GOT+4
write32le(Buf + 8, GotEntryAddr + 8); // GOT+8
write32le(Buf + 2, GotAddr + 4); // GOT+4
write32le(Buf + 8, GotAddr + 8); // GOT+8
}
void X86TargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
@ -385,7 +385,7 @@ void X86TargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
Buf[1] = Config->Shared ? 0xa3 : 0x25;
write32le(Buf + 2, Config->Shared ? (GotEntryAddr - GotAddr) : GotEntryAddr);
write32le(Buf + 7, RelOff);
write32le(Buf + 12, -Index * PltEntrySize - PltZeroEntrySize - 16);
write32le(Buf + 12, -Index * PltEntrySize - PltZeroSize - 16);
}
bool X86TargetInfo::needsCopyRel(uint32_t Type, const SymbolBody &S) const {
@ -617,7 +617,7 @@ X86_64TargetInfo::X86_64TargetInfo() {
TlsOffsetRel = R_X86_64_DTPOFF64;
UseLazyBinding = true;
PltEntrySize = 16;
PltZeroEntrySize = 16;
PltZeroSize = 16;
}
void X86_64TargetInfo::writeGotPltHeader(uint8_t *Buf) const {
@ -629,16 +629,16 @@ void X86_64TargetInfo::writeGotPlt(uint8_t *Buf, uint64_t Plt) const {
write32le(Buf, Plt + 6);
}
void X86_64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {
void X86_64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {
const uint8_t PltData[] = {
0xff, 0x35, 0x00, 0x00, 0x00, 0x00, // pushq GOT+8(%rip)
0xff, 0x25, 0x00, 0x00, 0x00, 0x00, // jmp *GOT+16(%rip)
0x0f, 0x1f, 0x40, 0x00 // nopl 0x0(rax)
};
memcpy(Buf, PltData, sizeof(PltData));
write32le(Buf + 2, GotEntryAddr - PltEntryAddr + 2); // GOT+8
write32le(Buf + 8, GotEntryAddr - PltEntryAddr + 4); // GOT+16
write32le(Buf + 2, GotAddr - PltAddr + 2); // GOT+8
write32le(Buf + 8, GotAddr - PltAddr + 4); // GOT+16
}
void X86_64TargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
@ -653,7 +653,7 @@ void X86_64TargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
write32le(Buf + 2, GotEntryAddr - PltEntryAddr - 6);
write32le(Buf + 7, Index);
write32le(Buf + 12, -Index * PltEntrySize - PltZeroEntrySize - 16);
write32le(Buf + 12, -Index * PltEntrySize - PltZeroSize - 16);
}
bool X86_64TargetInfo::needsCopyRel(uint32_t Type, const SymbolBody &S) const {
@ -936,8 +936,8 @@ static uint16_t applyPPCHighesta(uint64_t V) { return (V + 0x8000) >> 48; }
PPCTargetInfo::PPCTargetInfo() {}
void PPCTargetInfo::writeGotPlt(uint8_t *Buf, uint64_t Plt) const {}
void PPCTargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {}
void PPCTargetInfo::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {}
void PPCTargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
uint64_t GotEntryAddr, uint64_t PltEntryAddr,
int32_t Index, unsigned RelOff) const {}
@ -1002,8 +1002,8 @@ uint64_t getPPC64TocBase() {
}
void PPC64TargetInfo::writeGotPlt(uint8_t *Buf, uint64_t Plt) const {}
void PPC64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {}
void PPC64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {}
void PPC64TargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
uint64_t GotEntryAddr, uint64_t PltEntryAddr,
int32_t Index, unsigned RelOff) const {
@ -1183,7 +1183,7 @@ AArch64TargetInfo::AArch64TargetInfo() {
TlsGotRel = R_AARCH64_TLS_TPREL64;
UseLazyBinding = true;
PltEntrySize = 16;
PltZeroEntrySize = 32;
PltZeroSize = 32;
}
unsigned AArch64TargetInfo::getDynRel(unsigned Type) const {
@ -1198,8 +1198,8 @@ void AArch64TargetInfo::writeGotPlt(uint8_t *Buf, uint64_t Plt) const {
write64le(Buf, Out<ELF64LE>::Plt->getVA());
}
void AArch64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {
void AArch64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {
const uint8_t PltData[] = {
0xf0, 0x7b, 0xbf, 0xa9, // stp x16, x30, [sp,#-16]!
0x10, 0x00, 0x00, 0x90, // adrp x16, Page(&(.plt.got[2]))
@ -1212,12 +1212,12 @@ void AArch64TargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
};
memcpy(Buf, PltData, sizeof(PltData));
relocateOne(Buf + 4, Buf + 8, R_AARCH64_ADR_PREL_PG_HI21, PltEntryAddr + 4,
GotEntryAddr + 16);
relocateOne(Buf + 8, Buf + 12, R_AARCH64_LDST64_ABS_LO12_NC, PltEntryAddr + 8,
GotEntryAddr + 16);
relocateOne(Buf + 12, Buf + 16, R_AARCH64_ADD_ABS_LO12_NC, PltEntryAddr + 12,
GotEntryAddr + 16);
relocateOne(Buf + 4, Buf + 8, R_AARCH64_ADR_PREL_PG_HI21, PltAddr + 4,
GotAddr + 16);
relocateOne(Buf + 8, Buf + 12, R_AARCH64_LDST64_ABS_LO12_NC, PltAddr + 8,
GotAddr + 16);
relocateOne(Buf + 12, Buf + 16, R_AARCH64_ADD_ABS_LO12_NC, PltAddr + 12,
GotAddr + 16);
}
void AArch64TargetInfo::writePlt(uint8_t *Buf, uint64_t GotAddr,
@ -1416,8 +1416,8 @@ void AMDGPUTargetInfo::writeGotPlt(uint8_t *Buf, uint64_t Plt) const {
llvm_unreachable("not implemented");
}
void AMDGPUTargetInfo::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {
void AMDGPUTargetInfo::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {
llvm_unreachable("not implemented");
}
@ -1471,8 +1471,8 @@ void MipsTargetInfo<ELFT>::writeGotHeader(uint8_t *Buf) const {
template <class ELFT>
void MipsTargetInfo<ELFT>::writeGotPlt(uint8_t *Buf, uint64_t Plt) const {}
template <class ELFT>
void MipsTargetInfo<ELFT>::writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const {}
void MipsTargetInfo<ELFT>::writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const {}
template <class ELFT>
void MipsTargetInfo<ELFT>::writePlt(uint8_t *Buf, uint64_t GotAddr,
uint64_t GotEntryAddr,

6
lld/ELF/Target.h
View File

@ -46,8 +46,8 @@ public:
// If lazy binding is supported, the first entry of the PLT has code
// to call the dynamic linker to resolve PLT entries the first time
// they are called. This function writes that code.
virtual void writePltZero(uint8_t *Buf, uint64_t GotEntryAddr,
uint64_t PltEntryAddr) const = 0;
virtual void writePltZero(uint8_t *Buf, uint64_t GotAddr,
uint64_t PltAddr) const = 0;
virtual void writePlt(uint8_t *Buf, uint64_t GotAddr, uint64_t GotEntryAddr,
uint64_t PltEntryAddr, int32_t Index,
@ -100,7 +100,7 @@ public:
unsigned TlsModuleIndexRel;
unsigned TlsOffsetRel;
unsigned PltEntrySize = 8;
unsigned PltZeroEntrySize = 0;
unsigned PltZeroSize = 0;
unsigned GotHeaderEntriesNum = 0;
unsigned GotPltHeaderEntriesNum = 3;
bool UseLazyBinding = false;