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-rw-r--r--lib/MC/MCDwarf.cpp89
1 files changed, 50 insertions, 39 deletions
diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 13164ed..ad86db1 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -7,22 +7,21 @@
//
//===----------------------------------------------------------------------===//
-#include "llvm/ADT/FoldingSet.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDwarf.h"
-#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCObjectWriter.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetAsmBackend.h"
#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Twine.h"
using namespace llvm;
// Given a special op, return the address skip amount (in units of
@@ -173,7 +172,9 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS,
// At this point we want to emit/create the sequence to encode the delta in
// line numbers and the increment of the address from the previous Label
// and the current Label.
- MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label);
+ const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo();
+ MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label,
+ asmInfo.getPointerSize());
LastLine = it->getLine();
LastLabel = Label;
@@ -197,7 +198,9 @@ static inline void EmitDwarfLineTable(MCStreamer *MCOS,
// Switch back the the dwarf line section.
MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection());
- MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd);
+ const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo();
+ MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd,
+ asmInfo.getPointerSize());
}
//
@@ -428,25 +431,24 @@ void MCDwarfFile::dump() const {
static int getDataAlignmentFactor(MCStreamer &streamer) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ const MCAsmInfo &asmInfo = context.getAsmInfo();
int size = asmInfo.getPointerSize();
- if (asmInfo.getStackGrowthDirection() == TargetFrameLowering::StackGrowsUp)
+ if (asmInfo.isStackGrowthDirectionUp())
return size;
- else
- return -size;
+ else
+ return -size;
}
static unsigned getSizeForEncoding(MCStreamer &streamer,
unsigned symbolEncoding) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
unsigned format = symbolEncoding & 0x0f;
switch (format) {
default:
assert(0 && "Unknown Encoding");
case dwarf::DW_EH_PE_absptr:
case dwarf::DW_EH_PE_signed:
- return asmInfo.getPointerSize();
+ return context.getAsmInfo().getPointerSize();
case dwarf::DW_EH_PE_udata2:
case dwarf::DW_EH_PE_sdata2:
return 2;
@@ -483,11 +485,11 @@ static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol,
}
static const MachineLocation TranslateMachineLocation(
- const TargetAsmInfo &AsmInfo,
+ const TargetAsmInfo &TAI,
const MachineLocation &Loc) {
unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ?
MachineLocation::VirtualFP :
- unsigned(AsmInfo.getDwarfRegNum(Loc.getReg(), true));
+ unsigned(TAI.getDwarfRegNum(Loc.getReg(), true));
const MachineLocation &NewLoc = Loc.isReg() ?
MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset());
return NewLoc;
@@ -500,7 +502,6 @@ namespace {
bool UsingCFI;
bool IsEH;
const MCSymbol *SectionStart;
-
public:
FrameEmitterImpl(bool usingCFI, bool isEH, const MCSymbol *sectionStart) :
CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH),
@@ -715,6 +716,15 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
// .quad __gxx_personality
// .quad except_tab1
+ uint32_t Encoding =
+ TAI.getCompactUnwindEncoding(Frame.Instructions,
+ getDataAlignmentFactor(Streamer), IsEH);
+ if (!Encoding) return false;
+
+ // The encoding needs to know we have an LSDA.
+ if (Frame.Lsda)
+ Encoding |= 0x40000000;
+
Streamer.SwitchSection(TAI.getCompactUnwindSection());
// Range Start
@@ -729,16 +739,14 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
if (VerboseAsm) Streamer.AddComment("Range Length");
Streamer.EmitAbsValue(Range, 4);
- // FIXME:
// Compact Encoding
- const std::vector<MachineMove> &Moves = TAI.getInitialFrameState();
- uint32_t Encoding = 0;
Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4);
- if (VerboseAsm) Streamer.AddComment("Compact Unwind Encoding");
+ if (VerboseAsm) Streamer.AddComment(Twine("Compact Unwind Encoding: 0x") +
+ Twine(llvm::utohexstr(Encoding)));
Streamer.EmitIntValue(Encoding, Size);
// Personality Function
- Size = getSizeForEncoding(Streamer, Frame.PersonalityEncoding);
+ Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr);
if (VerboseAsm) Streamer.AddComment("Personality Function");
if (Frame.Personality)
Streamer.EmitSymbolValue(Frame.Personality, Size);
@@ -763,11 +771,11 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
const MCSymbol *lsda,
unsigned lsdaEncoding) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ const TargetAsmInfo &TAI = context.getTargetAsmInfo();
bool verboseAsm = streamer.isVerboseAsm();
MCSymbol *sectionStart;
- if (asmInfo.isFunctionEHFrameSymbolPrivate() || !IsEH)
+ if (TAI.isFunctionEHFrameSymbolPrivate() || !IsEH)
sectionStart = context.CreateTempSymbol();
else
sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum));
@@ -775,7 +783,7 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
streamer.EmitLabel(sectionStart);
CIENum++;
- MCSymbol *sectionEnd = streamer.getContext().CreateTempSymbol();
+ MCSymbol *sectionEnd = context.CreateTempSymbol();
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart,
@@ -816,7 +824,7 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
// Return Address Register
if (verboseAsm) streamer.AddComment("CIE Return Address Column");
- streamer.EmitULEB128IntValue(asmInfo.getDwarfRARegNum(true));
+ streamer.EmitULEB128IntValue(TAI.getDwarfRARegNum(true));
// Augmentation Data Length (optional)
@@ -850,21 +858,21 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding");
// Encoding of the FDE pointers
- EmitEncodingByte(streamer, asmInfo.getFDEEncoding(UsingCFI),
+ EmitEncodingByte(streamer, TAI.getFDEEncoding(UsingCFI),
"FDE Encoding");
}
// Initial Instructions
- const std::vector<MachineMove> &Moves = asmInfo.getInitialFrameState();
+ const std::vector<MachineMove> &Moves = TAI.getInitialFrameState();
std::vector<MCCFIInstruction> Instructions;
for (int i = 0, n = Moves.size(); i != n; ++i) {
MCSymbol *Label = Moves[i].getLabel();
const MachineLocation &Dst =
- TranslateMachineLocation(asmInfo, Moves[i].getDestination());
+ TranslateMachineLocation(TAI, Moves[i].getDestination());
const MachineLocation &Src =
- TranslateMachineLocation(asmInfo, Moves[i].getSource());
+ TranslateMachineLocation(TAI, Moves[i].getSource());
MCCFIInstruction Inst(Label, Dst, Src);
Instructions.push_back(Inst);
}
@@ -872,7 +880,8 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
EmitCFIInstructions(streamer, Instructions, NULL);
// Padding
- streamer.EmitValueToAlignment(IsEH ? 4 : asmInfo.getPointerSize());
+ streamer.EmitValueToAlignment(IsEH
+ ? 4 : context.getAsmInfo().getPointerSize());
streamer.EmitLabel(sectionEnd);
return *sectionStart;
@@ -884,10 +893,10 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
MCContext &context = streamer.getContext();
MCSymbol *fdeStart = context.CreateTempSymbol();
MCSymbol *fdeEnd = context.CreateTempSymbol();
- const TargetAsmInfo &TAsmInfo = context.getTargetAsmInfo();
+ const TargetAsmInfo &TAI = context.getTargetAsmInfo();
bool verboseAsm = streamer.isVerboseAsm();
- if (!TAsmInfo.isFunctionEHFrameSymbolPrivate() && IsEH) {
+ if (!TAI.isFunctionEHFrameSymbolPrivate() && IsEH) {
MCSymbol *EHSym =
context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh"));
streamer.EmitEHSymAttributes(frame.Function, EHSym);
@@ -916,7 +925,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
streamer.EmitSymbolValue(&cieStart, 4);
}
- unsigned fdeEncoding = TAsmInfo.getFDEEncoding(UsingCFI);
+ unsigned fdeEncoding = TAI.getFDEEncoding(UsingCFI);
unsigned size = getSizeForEncoding(streamer, fdeEncoding);
// PC Begin
@@ -1002,9 +1011,9 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
bool UsingCFI,
bool IsEH) {
MCContext &Context = Streamer.getContext();
- const TargetAsmInfo &AsmInfo = Context.getTargetAsmInfo();
- const MCSection &Section = IsEH ? *AsmInfo.getEHFrameSection() :
- *AsmInfo.getDwarfFrameSection();
+ const TargetAsmInfo &TAI = Context.getTargetAsmInfo();
+ const MCSection &Section = IsEH ? *TAI.getEHFrameSection() :
+ *TAI.getDwarfFrameSection();
Streamer.SwitchSection(&Section);
MCSymbol *SectionStart = Context.CreateTempSymbol();
Streamer.EmitLabel(SectionStart);
@@ -1016,9 +1025,11 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
const MCSymbol *DummyDebugKey = NULL;
for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
- if (IsEH && AsmInfo.getCompactUnwindSection() &&
- Emitter.EmitCompactUnwind(Streamer, Frame))
+ if (IsEH && TAI.getCompactUnwindSection() &&
+ Emitter.EmitCompactUnwind(Streamer, Frame)) {
+ FDEEnd = NULL;
continue;
+ }
CIEKey Key(Frame.Personality, Frame.PersonalityEncoding,
Frame.LsdaEncoding);
@@ -1034,7 +1045,7 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
Streamer.EmitLabel(FDEEnd);
}
- Streamer.EmitValueToAlignment(AsmInfo.getPointerSize());
+ Streamer.EmitValueToAlignment(Context.getAsmInfo().getPointerSize());
if (FDEEnd)
Streamer.EmitLabel(FDEEnd);
}
generated by cgit v1.1 at 2025-08-15 23:05:46 +0000