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Code Issues Projects Releases Wiki Activity

Proper support of non-lazy indirect symbols.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81422 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-09-10 01:23:53 +00:00
parent 43e484fbcf
commit 08669746d0
2 changed files with 21 additions and 8 deletions
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26
lib/Target/ARM/ARMCodeEmitter.cpp
View File

@ -60,6 +60,7 @@ namespace {
ARMJITInfo *JTI;
const ARMInstrInfo *II;
const TargetData *TD;
const ARMSubtarget *Subtarget;
TargetMachine &TM;
CodeEmitter &MCE;
const std::vector<MachineConstantPoolEntry> *MCPEs;
@ -163,7 +164,7 @@ namespace {
/// Routines that handle operands which add machine relocations which are
/// fixed up by the relocation stage.
void emitGlobalAddress(GlobalValue *GV, unsigned Reloc,
bool NeedStub, intptr_t ACPV = 0);
bool NeedStub, bool Indirect, intptr_t ACPV = 0);
void emitExternalSymbolAddress(const char *ES, unsigned Reloc);
void emitConstPoolAddress(unsigned CPI, unsigned Reloc);
void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc);
@ -195,9 +196,10 @@ bool Emitter<CodeEmitter>::runOnMachineFunction(MachineFunction &MF) {
assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
MF.getTarget().getRelocationModel() != Reloc::Static) &&
"JIT relocation model must be set to static or default!");
JTI = ((ARMTargetMachine&)MF.getTarget()).getJITInfo();
II = ((ARMTargetMachine&)MF.getTarget()).getInstrInfo();
TD = ((ARMTargetMachine&)MF.getTarget()).getTargetData();
JTI = ((ARMTargetMachine&)MF.getTarget()).getJITInfo();
Subtarget = &TM.getSubtarget<ARMSubtarget>();
MCPEs = &MF.getConstantPool()->getConstants();
MJTEs = &MF.getJumpTableInfo()->getJumpTables();
IsPIC = TM.getRelocationModel() == Reloc::PIC_;
@ -244,7 +246,7 @@ unsigned Emitter<CodeEmitter>::getMachineOpValue(const MachineInstr &MI,
else if (MO.isImm())
return static_cast<unsigned>(MO.getImm());
else if (MO.isGlobal())
emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true);
emitGlobalAddress(MO.getGlobal(), ARM::reloc_arm_branch, true, false);
else if (MO.isSymbol())
emitExternalSymbolAddress(MO.getSymbolName(), ARM::reloc_arm_branch);
else if (MO.isCPI()) {
@ -270,9 +272,14 @@ unsigned Emitter<CodeEmitter>::getMachineOpValue(const MachineInstr &MI,
///
template<class CodeEmitter>
void Emitter<CodeEmitter>::emitGlobalAddress(GlobalValue *GV, unsigned Reloc,
bool NeedStub, intptr_t ACPV) {
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
GV, ACPV, NeedStub));
bool NeedStub, bool Indirect,
intptr_t ACPV) {
MachineRelocation MR = Indirect
? MachineRelocation::getIndirectSymbol(MCE.getCurrentPCOffset(), Reloc,
GV, ACPV, NeedStub)
: MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
GV, ACPV, NeedStub);
MCE.addRelocation(MR);
}
/// emitExternalSymbolAddress - Arrange for the address of an external symbol to
@ -417,8 +424,11 @@ void Emitter<CodeEmitter>::emitConstPoolInstruction(const MachineInstr &MI) {
GlobalValue *GV = ACPV->getGV();
if (GV) {
Reloc::Model RelocM = TM.getRelocationModel();
emitGlobalAddress(GV, ARM::reloc_arm_machine_cp_entry,
isa<Function>(GV), (intptr_t)ACPV);
isa<Function>(GV),
Subtarget->GVIsIndirectSymbol(GV, RelocM),
(intptr_t)ACPV);
} else {
emitExternalSymbolAddress(ACPV->getSymbol(), ARM::reloc_arm_absolute);
}
@ -437,7 +447,7 @@ void Emitter<CodeEmitter>::emitConstPoolInstruction(const MachineInstr &MI) {
});
if (GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV));
emitGlobalAddress(GV, ARM::reloc_arm_absolute, isa<Function>(GV), false);
emitWordLE(0);
} else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
uint32_t Val = *(uint32_t*)CI->getValue().getRawData();

3
lib/Target/ARM/ARMJITInfo.cpp
View File

@ -145,6 +145,9 @@ void *ARMJITInfo::emitGlobalValueIndirectSym(const GlobalValue *GV, void *Ptr,
llvm_unreachable("ERROR: Unable to mark indirect symbol writable");
}
JCE.emitWordLE((intptr_t)Ptr);
if (!sys::Memory::setRangeExecutable((void*)Addr, 4)) {
llvm_unreachable("ERROR: Unable to mark indirect symbol executable");
}
void *PtrAddr = JCE.finishGVStub(GV);
addIndirectSymAddr(Ptr, (intptr_t)PtrAddr);
return PtrAddr;