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Diffstat (limited to 'lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp')
-rw-r--r--lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp92
1 files changed, 65 insertions, 27 deletions
diff --git a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index 5a01d26..a4d13ed 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -30,6 +30,7 @@
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSection.h"
@@ -62,7 +63,7 @@ static const char *GetFPUName(unsigned ID) {
#define ARM_FPU_NAME(NAME, ID) case ARM::ID: return NAME;
#include "ARMFPUName.def"
}
- return NULL;
+ return nullptr;
}
static const char *GetArchName(unsigned ID) {
@@ -75,7 +76,7 @@ static const char *GetArchName(unsigned ID) {
#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
#include "ARMArchName.def"
}
- return NULL;
+ return nullptr;
}
static const char *GetArchDefaultCPUName(unsigned ID) {
@@ -88,7 +89,7 @@ static const char *GetArchDefaultCPUName(unsigned ID) {
#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
#include "ARMArchName.def"
}
- return NULL;
+ return nullptr;
}
static unsigned GetArchDefaultCPUArch(unsigned ID) {
@@ -139,6 +140,7 @@ class ARMTargetAsmStreamer : public ARMTargetStreamer {
void finishAttributeSection() override;
void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE) override;
+ void emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) override;
public:
ARMTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS,
@@ -260,6 +262,10 @@ ARMTargetAsmStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *S) {
OS << "\t.tlsdescseq\t" << S->getSymbol().getName();
}
+void ARMTargetAsmStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) {
+ OS << "\t.thumb_set\t" << *Symbol << ", " << *Value << '\n';
+}
+
void ARMTargetAsmStreamer::emitInst(uint32_t Inst, char Suffix) {
OS << "\t.inst";
if (Suffix)
@@ -310,7 +316,7 @@ private:
for (size_t i = 0; i < Contents.size(); ++i)
if (Contents[i].Tag == Attribute)
return &Contents[i];
- return 0;
+ return nullptr;
}
void setAttributeItem(unsigned Attribute, unsigned Value,
@@ -406,8 +412,10 @@ private:
void emitFPU(unsigned FPU) override;
void emitInst(uint32_t Inst, char Suffix = '\0') override;
void finishAttributeSection() override;
+ void emitLabel(MCSymbol *Symbol) override;
void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE) override;
+ void emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) override;
size_t calculateContentSize() const;
@@ -415,7 +423,7 @@ public:
ARMTargetELFStreamer(MCStreamer &S)
: ARMTargetStreamer(S), CurrentVendor("aeabi"), FPU(ARM::INVALID_FPU),
Arch(ARM::INVALID_ARCH), EmittedArch(ARM::INVALID_ARCH),
- AttributeSection(0) {}
+ AttributeSection(nullptr) {}
};
/// Extend the generic ELFStreamer class so that it can emit mapping symbols at
@@ -531,7 +539,8 @@ public:
/// This is one of the functions used to emit data into an ELF section, so the
/// ARM streamer overrides it to add the appropriate mapping symbol ($d) if
/// necessary.
- void EmitValueImpl(const MCExpr *Value, unsigned Size) override {
+ void EmitValueImpl(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) override {
EmitDataMappingSymbol();
MCELFStreamer::EmitValueImpl(Value, Size);
}
@@ -600,12 +609,8 @@ private:
}
void EmitThumbFunc(MCSymbol *Func) override {
- // FIXME: Anything needed here to flag the function as thumb?
-
getAssembler().setIsThumbFunc(Func);
-
- MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Func);
- SD.setFlags(SD.getFlags() | ELF_Other_ThumbFunc);
+ EmitSymbolAttribute(Func, MCSA_ELF_TypeFunction);
}
// Helper functions for ARM exception handling directives
@@ -980,10 +985,35 @@ void ARMTargetELFStreamer::finishAttributeSection() {
Contents.clear();
FPU = ARM::INVALID_FPU;
}
+
+void ARMTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
+ ARMELFStreamer &Streamer = getStreamer();
+ if (!Streamer.IsThumb)
+ return;
+
+ const MCSymbolData &SD = Streamer.getOrCreateSymbolData(Symbol);
+ if (MCELF::GetType(SD) & (ELF::STT_FUNC << ELF_STT_Shift))
+ Streamer.EmitThumbFunc(Symbol);
+}
+
void
ARMTargetELFStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *S) {
getStreamer().EmitFixup(S, FK_Data_4);
}
+
+void ARMTargetELFStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) {
+ if (const MCSymbolRefExpr *SRE = dyn_cast<MCSymbolRefExpr>(Value)) {
+ const MCSymbol &Sym = SRE->getSymbol();
+ if (!Sym.isDefined()) {
+ getStreamer().EmitAssignment(Symbol, Value);
+ return;
+ }
+ }
+
+ getStreamer().EmitThumbFunc(Symbol);
+ getStreamer().EmitAssignment(Symbol, Value);
+}
+
void ARMTargetELFStreamer::emitInst(uint32_t Inst, char Suffix) {
getStreamer().emitInst(Inst, Suffix);
}
@@ -1012,7 +1042,7 @@ inline void ARMELFStreamer::SwitchToEHSection(const char *Prefix,
}
// Get .ARM.extab or .ARM.exidx section
- const MCSectionELF *EHSection = NULL;
+ const MCSectionELF *EHSection = nullptr;
if (const MCSymbol *Group = FnSection.getGroup()) {
EHSection = getContext().getELFSection(
EHSecName, Type, Flags | ELF::SHF_GROUP, Kind,
@@ -1049,9 +1079,9 @@ void ARMELFStreamer::EmitFixup(const MCExpr *Expr, MCFixupKind Kind) {
}
void ARMELFStreamer::Reset() {
- ExTab = NULL;
- FnStart = NULL;
- Personality = NULL;
+ ExTab = nullptr;
+ FnStart = nullptr;
+ Personality = nullptr;
PersonalityIndex = ARM::EHABI::NUM_PERSONALITY_INDEX;
FPReg = ARM::SP;
FPOffset = 0;
@@ -1065,7 +1095,7 @@ void ARMELFStreamer::Reset() {
}
void ARMELFStreamer::emitFnStart() {
- assert(FnStart == 0);
+ assert(FnStart == nullptr);
FnStart = getContext().CreateTempSymbol();
EmitLabel(FnStart);
}
@@ -1104,11 +1134,14 @@ void ARMELFStreamer::emitFnEnd() {
// the second word of exception index table entry. The size of the unwind
// opcodes should always be 4 bytes.
assert(PersonalityIndex == ARM::EHABI::AEABI_UNWIND_CPP_PR0 &&
- "Compact model must use __aeabi_cpp_unwind_pr0 as personality");
+ "Compact model must use __aeabi_unwind_cpp_pr0 as personality");
assert(Opcodes.size() == 4u &&
- "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be equal to 4");
- EmitBytes(StringRef(reinterpret_cast<const char*>(Opcodes.data()),
- Opcodes.size()));
+ "Unwind opcode size for __aeabi_unwind_cpp_pr0 must be equal to 4");
+ uint64_t Intval = Opcodes[0] |
+ Opcodes[1] << 8 |
+ Opcodes[2] << 16 |
+ Opcodes[3] << 24;
+ EmitIntValue(Intval, Opcodes.size());
}
// Switch to the section containing FnStart
@@ -1180,8 +1213,15 @@ void ARMELFStreamer::FlushUnwindOpcodes(bool NoHandlerData) {
}
// Emit unwind opcodes
- EmitBytes(StringRef(reinterpret_cast<const char *>(Opcodes.data()),
- Opcodes.size()));
+ assert((Opcodes.size() % 4) == 0 &&
+ "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be multiple of 4");
+ for (unsigned I = 0; I != Opcodes.size(); I += 4) {
+ uint64_t Intval = Opcodes[I] |
+ Opcodes[I + 1] << 8 |
+ Opcodes[I + 2] << 16 |
+ Opcodes[I + 3] << 24;
+ EmitIntValue(Intval, 4);
+ }
// According to ARM EHABI section 9.2, if the __aeabi_unwind_cpp_pr1() or
// __aeabi_unwind_cpp_pr2() is used, then the handler data must be emitted
@@ -1283,13 +1323,11 @@ void ARMELFStreamer::emitUnwindRaw(int64_t Offset,
namespace llvm {
MCStreamer *createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
- bool isVerboseAsm, bool useCFI,
- bool useDwarfDirectory,
+ bool isVerboseAsm, bool useDwarfDirectory,
MCInstPrinter *InstPrint, MCCodeEmitter *CE,
MCAsmBackend *TAB, bool ShowInst) {
- MCStreamer *S =
- llvm::createAsmStreamer(Ctx, OS, isVerboseAsm, useCFI, useDwarfDirectory,
- InstPrint, CE, TAB, ShowInst);
+ MCStreamer *S = llvm::createAsmStreamer(
+ Ctx, OS, isVerboseAsm, useDwarfDirectory, InstPrint, CE, TAB, ShowInst);
new ARMTargetAsmStreamer(*S, OS, *InstPrint, isVerboseAsm);
return S;
}
generated by cgit v1.1 at 2024-06-03 16:37:34 +0000