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-rw-r--r--lib/Target/ARM/ARMAsmPrinter.cpp163
1 files changed, 112 insertions, 51 deletions
diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp
index 0fa865f..55e9fe5 100644
--- a/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -12,7 +12,6 @@
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "asm-printer"
#include "ARMAsmPrinter.h"
#include "ARM.h"
#include "ARMConstantPoolValue.h"
@@ -45,6 +44,7 @@
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ARMBuildAttributes.h"
+#include "llvm/Support/COFF.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ELF.h"
@@ -55,6 +55,8 @@
#include <cctype>
using namespace llvm;
+#define DEBUG_TYPE "asm-printer"
+
void ARMAsmPrinter::EmitFunctionBodyEnd() {
// Make sure to terminate any constant pools that were at the end
// of the function.
@@ -85,7 +87,7 @@ void ARMAsmPrinter::EmitXXStructor(const Constant *CV) {
? MCSymbolRefExpr::VK_ARM_TARGET1
: MCSymbolRefExpr::VK_None),
OutContext);
-
+
OutStreamer.EmitValue(E, Size);
}
@@ -96,7 +98,28 @@ bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
AFI = MF.getInfo<ARMFunctionInfo>();
MCP = MF.getConstantPool();
- return AsmPrinter::runOnMachineFunction(MF);
+ SetupMachineFunction(MF);
+
+ if (Subtarget->isTargetCOFF()) {
+ bool Internal = MF.getFunction()->hasInternalLinkage();
+ COFF::SymbolStorageClass Scl = Internal ? COFF::IMAGE_SYM_CLASS_STATIC
+ : COFF::IMAGE_SYM_CLASS_EXTERNAL;
+ int Type = COFF::IMAGE_SYM_DTYPE_FUNCTION << COFF::SCT_COMPLEX_TYPE_SHIFT;
+
+ OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
+ OutStreamer.EmitCOFFSymbolStorageClass(Scl);
+ OutStreamer.EmitCOFFSymbolType(Type);
+ OutStreamer.EndCOFFSymbolDef();
+ }
+
+ // Have common code print out the function header with linkage info etc.
+ EmitFunctionHeader();
+
+ // Emit the rest of the function body.
+ EmitFunctionBody();
+
+ // We didn't modify anything.
+ return false;
}
void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
@@ -239,7 +262,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
if (ARM::GPRPairRegClass.contains(RegBegin)) {
const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
unsigned Reg0 = TRI->getSubReg(RegBegin, ARM::gsub_0);
- O << ARMInstPrinter::getRegisterName(Reg0) << ", ";;
+ O << ARMInstPrinter::getRegisterName(Reg0) << ", ";
RegBegin = TRI->getSubReg(RegBegin, ARM::gsub_1);
}
O << ARMInstPrinter::getRegisterName(RegBegin);
@@ -383,7 +406,7 @@ void ARMAsmPrinter::emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
// If either end mode is unknown (EndInfo == NULL) or different than
// the start mode, then restore the start mode.
const bool WasThumb = isThumb(StartInfo);
- if (EndInfo == NULL || WasThumb != isThumb(*EndInfo)) {
+ if (!EndInfo || WasThumb != isThumb(*EndInfo)) {
OutStreamer.EmitAssemblerFlag(WasThumb ? MCAF_Code16 : MCAF_Code32);
}
}
@@ -456,6 +479,29 @@ void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
emitAttributes();
}
+static void
+emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel,
+ MachineModuleInfoImpl::StubValueTy &MCSym) {
+ // L_foo$stub:
+ OutStreamer.EmitLabel(StubLabel);
+ // .indirect_symbol _foo
+ OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
+
+ if (MCSym.getInt())
+ // External to current translation unit.
+ OutStreamer.EmitIntValue(0, 4/*size*/);
+ else
+ // Internal to current translation unit.
+ //
+ // When we place the LSDA into the TEXT section, the type info
+ // pointers need to be indirect and pc-rel. We accomplish this by
+ // using NLPs; however, sometimes the types are local to the file.
+ // We need to fill in the value for the NLP in those cases.
+ OutStreamer.EmitValue(
+ MCSymbolRefExpr::Create(MCSym.getPointer(), OutStreamer.getContext()),
+ 4 /*size*/);
+}
+
void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
if (Subtarget->isTargetMachO()) {
@@ -472,27 +518,9 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
// Switch with ".non_lazy_symbol_pointer" directive.
OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
EmitAlignment(2);
- for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
- // L_foo$stub:
- OutStreamer.EmitLabel(Stubs[i].first);
- // .indirect_symbol _foo
- MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
- OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol);
-
- if (MCSym.getInt())
- // External to current translation unit.
- OutStreamer.EmitIntValue(0, 4/*size*/);
- else
- // Internal to current translation unit.
- //
- // When we place the LSDA into the TEXT section, the type info
- // pointers need to be indirect and pc-rel. We accomplish this by
- // using NLPs; however, sometimes the types are local to the file.
- // We need to fill in the value for the NLP in those cases.
- OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
- OutContext),
- 4/*size*/);
- }
+
+ for (auto &Stub : Stubs)
+ emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second);
Stubs.clear();
OutStreamer.AddBlankLine();
@@ -500,17 +528,11 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
Stubs = MMIMacho.GetHiddenGVStubList();
if (!Stubs.empty()) {
- OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
+ OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
EmitAlignment(2);
- for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
- // L_foo$stub:
- OutStreamer.EmitLabel(Stubs[i].first);
- // .long _foo
- OutStreamer.EmitValue(MCSymbolRefExpr::
- Create(Stubs[i].second.getPointer(),
- OutContext),
- 4/*size*/);
- }
+
+ for (auto &Stub : Stubs)
+ emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second);
Stubs.clear();
OutStreamer.AddBlankLine();
@@ -523,6 +545,28 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
// generates code that does this, it is always safe to set.
OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
}
+
+ // Emit a .data.rel section containing any stubs that were created.
+ if (Subtarget->isTargetELF()) {
+ const TargetLoweringObjectFileELF &TLOFELF =
+ static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
+
+ MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
+
+ // Output stubs for external and common global variables.
+ MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
+ const DataLayout *TD = TM.getDataLayout();
+
+ for (auto &stub: Stubs) {
+ OutStreamer.EmitLabel(stub.first);
+ OutStreamer.EmitSymbolValue(stub.second.getPointer(),
+ TD->getPointerSize(0));
+ }
+ Stubs.clear();
+ }
+ }
}
//===----------------------------------------------------------------------===//
@@ -575,7 +619,7 @@ void ARMAsmPrinter::emitAttributes() {
getArchForCPU(CPUString, Subtarget));
// Tag_CPU_arch_profile must have the default value of 0 when "Architecture
- // profile is not applicable (e.g. pre v7, or cross-profile code)".
+ // profile is not applicable (e.g. pre v7, or cross-profile code)".
if (Subtarget->hasV7Ops()) {
if (Subtarget->isAClass()) {
ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
@@ -627,6 +671,20 @@ void ARMAsmPrinter::emitAttributes() {
ATS.emitFPU(ARM::VFPV2);
}
+ if (TM.getRelocationModel() == Reloc::PIC_) {
+ // PIC specific attributes.
+ ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RW_data,
+ ARMBuildAttrs::AddressRWPCRel);
+ ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RO_data,
+ ARMBuildAttrs::AddressROPCRel);
+ ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use,
+ ARMBuildAttrs::AddressGOT);
+ } else {
+ // Allow direct addressing of imported data for all other relocation models.
+ ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use,
+ ARMBuildAttrs::AddressDirect);
+ }
+
// Signal various FP modes.
if (!TM.Options.UnsafeFPMath) {
ATS.emitAttribute(ARMBuildAttrs::ABI_FP_denormal, ARMBuildAttrs::Allowed);
@@ -723,7 +781,7 @@ MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV,
MachineModuleInfoImpl::StubValueTy &StubSym =
GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) :
MMIMachO.getGVStubEntry(MCSym);
- if (StubSym.getPointer() == 0)
+ if (!StubSym.getPointer())
StubSym = MachineModuleInfoImpl::
StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
return MCSym;
@@ -971,7 +1029,8 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
RegList.push_back(SrcReg);
break;
}
- ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
+ if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+ ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
} else {
// Changes of stack / frame pointer.
if (SrcReg == ARM::SP) {
@@ -1016,18 +1075,20 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
}
}
- if (DstReg == FramePtr && FramePtr != ARM::SP)
- // Set-up of the frame pointer. Positive values correspond to "add"
- // instruction.
- ATS.emitSetFP(FramePtr, ARM::SP, -Offset);
- else if (DstReg == ARM::SP) {
- // Change of SP by an offset. Positive values correspond to "sub"
- // instruction.
- ATS.emitPad(Offset);
- } else {
- // Move of SP to a register. Positive values correspond to an "add"
- // instruction.
- ATS.emitMovSP(DstReg, -Offset);
+ if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM) {
+ if (DstReg == FramePtr && FramePtr != ARM::SP)
+ // Set-up of the frame pointer. Positive values correspond to "add"
+ // instruction.
+ ATS.emitSetFP(FramePtr, ARM::SP, -Offset);
+ else if (DstReg == ARM::SP) {
+ // Change of SP by an offset. Positive values correspond to "sub"
+ // instruction.
+ ATS.emitPad(Offset);
+ } else {
+ // Move of SP to a register. Positive values correspond to an "add"
+ // instruction.
+ ATS.emitMovSP(DstReg, -Offset);
+ }
}
} else if (DstReg == ARM::SP) {
MI->dump();
generated by cgit v1.1 at 2024-05-18 00:35:38 +0000