6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-08-05 13:26:55 +00:00
Code Issues Projects Releases Wiki Activity

Teach the MC to output code/data region marker labels in MachO and ELF modes. These are used by disassemblers to provide better disassembly, particularly on targets like ARM Thumb that like to intermingle data in the TEXT segment.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141135 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2011-10-04 23:26:17 +00:00
parent 9e5887b17e
commit 2fec6c5ff1
10 changed files with 208 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
lib/Target/ARM/ARMAsmPrinter.cpp
View File

@@ -290,6 +290,8 @@ void ARMAsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
}
void ARMAsmPrinter::EmitFunctionEntryLabel() {
OutStreamer.ForceCodeRegion();
if (AFI->isThumbFunction()) {
OutStreamer.EmitAssemblerFlag(MCAF_Code16);
OutStreamer.EmitThumbFunc(CurrentFnSym);
@@ -905,6 +907,9 @@ void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
unsigned JTI = MO1.getIndex();
// Tag the jump table appropriately for precise disassembly.
OutStreamer.EmitJumpTable32Region();
// Emit a label for the jump table.
MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
OutStreamer.EmitLabel(JTISymbol);
@@ -947,6 +952,14 @@ void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
unsigned JTI = MO1.getIndex();
// Emit a label for the jump table.
if (MI->getOpcode() == ARM::t2TBB_JT) {
OutStreamer.EmitJumpTable8Region();
} else if (MI->getOpcode() == ARM::t2TBH_JT) {
OutStreamer.EmitJumpTable16Region();
} else {
OutStreamer.EmitJumpTable32Region();
}
MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
OutStreamer.EmitLabel(JTISymbol);
@@ -1165,6 +1178,9 @@ extern cl::opt<bool> EnableARMEHABI;
#include "ARMGenMCPseudoLowering.inc"
void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
if (MI->getOpcode() != ARM::CONSTPOOL_ENTRY)
OutStreamer.EmitCodeRegion();
// Emit unwinding stuff for frame-related instructions
if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
EmitUnwindingInstruction(MI);
@@ -1470,6 +1486,10 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
EmitAlignment(2);
// Mark the constant pool entry as data if we're not already in a data
// region.
OutStreamer.EmitDataRegion();
OutStreamer.EmitLabel(GetCPISymbol(LabelId));
const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
@@ -1477,7 +1497,6 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
else
EmitGlobalConstant(MCPE.Val.ConstVal);
return;
}
case ARM::t2BR_JT: {

4
lib/Target/X86/X86MCInstLower.cpp
View File

@@ -592,6 +592,8 @@ static void LowerTlsAddr(MCStreamer &OutStreamer,
}
void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
OutStreamer.EmitCodeRegion();
X86MCInstLower MCInstLowering(Mang, *MF, *this);
switch (MI->getOpcode()) {
case TargetOpcode::DBG_VALUE:
@@ -608,7 +610,7 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
if (OutStreamer.hasRawTextSupport())
OutStreamer.EmitRawText(StringRef("\t#MEMBARRIER"));
return;
case X86::EH_RETURN:
case X86::EH_RETURN64: {