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-rw-r--r--lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp153
1 files changed, 66 insertions, 87 deletions
diff --git a/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp b/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
index 1ba6ab0..e66e985 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
@@ -8,9 +8,11 @@
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/ARMMCTargetDesc.h"
+#include "MCTargetDesc/ARMAddressingModes.h"
#include "MCTargetDesc/ARMBaseInfo.h"
#include "MCTargetDesc/ARMFixupKinds.h"
-#include "MCTargetDesc/ARMAddressingModes.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDirectives.h"
@@ -21,7 +23,6 @@
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Object/MachOFormat.h"
@@ -114,11 +115,15 @@ public:
MCValue &Target, uint64_t &Value,
bool &IsResolved);
+
+ void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
+ uint64_t Value) const;
+
bool mayNeedRelaxation(const MCInst &Inst) const;
bool fixupNeedsRelaxation(const MCFixup &Fixup,
uint64_t Value,
- const MCInstFragment *DF,
+ const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const;
void relaxInstruction(const MCInst &Inst, MCInst &Res) const;
@@ -161,7 +166,7 @@ bool ARMAsmBackend::mayNeedRelaxation(const MCInst &Inst) const {
bool ARMAsmBackend::fixupNeedsRelaxation(const MCFixup &Fixup,
uint64_t Value,
- const MCInstFragment *DF,
+ const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const {
switch ((unsigned)Fixup.getKind()) {
case ARM::fixup_arm_thumb_br: {
@@ -216,7 +221,7 @@ void ARMAsmBackend::relaxInstruction(const MCInst &Inst, MCInst &Res) const {
bool ARMAsmBackend::writeNopData(uint64_t Count, MCObjectWriter *OW) const {
const uint16_t Thumb1_16bitNopEncoding = 0x46c0; // using MOV r8,r8
const uint16_t Thumb2_16bitNopEncoding = 0xbf00; // NOP
- const uint32_t ARMv4_NopEncoding = 0xe1a0000; // using MOV r0,r0
+ const uint32_t ARMv4_NopEncoding = 0xe1a00000; // using MOV r0,r0
const uint32_t ARMv6T2_NopEncoding = 0xe320f000; // NOP
if (isThumb()) {
const uint16_t nopEncoding = hasNOP() ? Thumb2_16bitNopEncoding
@@ -552,65 +557,6 @@ void ARMAsmBackend::processFixupValue(const MCAssembler &Asm,
(void)adjustFixupValue(Fixup, Value, &Asm.getContext());
}
-namespace {
-
-// FIXME: This should be in a separate file.
-// ELF is an ELF of course...
-class ELFARMAsmBackend : public ARMAsmBackend {
-public:
- uint8_t OSABI;
- ELFARMAsmBackend(const Target &T, const StringRef TT,
- uint8_t _OSABI)
- : ARMAsmBackend(T, TT), OSABI(_OSABI) { }
-
- void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
- uint64_t Value) const;
-
- MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
- return createARMELFObjectWriter(OS, OSABI);
- }
-};
-
-// FIXME: Raise this to share code between Darwin and ELF.
-void ELFARMAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
- unsigned DataSize, uint64_t Value) const {
- unsigned NumBytes = 4; // FIXME: 2 for Thumb
- Value = adjustFixupValue(Fixup, Value);
- if (!Value) return; // Doesn't change encoding.
-
- unsigned Offset = Fixup.getOffset();
-
- // For each byte of the fragment that the fixup touches, mask in the bits from
- // the fixup value. The Value has been "split up" into the appropriate
- // bitfields above.
- for (unsigned i = 0; i != NumBytes; ++i)
- Data[Offset + i] |= uint8_t((Value >> (i * 8)) & 0xff);
-}
-
-// FIXME: This should be in a separate file.
-class DarwinARMAsmBackend : public ARMAsmBackend {
-public:
- const object::mach::CPUSubtypeARM Subtype;
- DarwinARMAsmBackend(const Target &T, const StringRef TT,
- object::mach::CPUSubtypeARM st)
- : ARMAsmBackend(T, TT), Subtype(st) {
- HasDataInCodeSupport = true;
- }
-
- MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
- return createARMMachObjectWriter(OS, /*Is64Bit=*/false,
- object::mach::CTM_ARM,
- Subtype);
- }
-
- void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
- uint64_t Value) const;
-
- virtual bool doesSectionRequireSymbols(const MCSection &Section) const {
- return false;
- }
-};
-
/// getFixupKindNumBytes - The number of bytes the fixup may change.
static unsigned getFixupKindNumBytes(unsigned Kind) {
switch (Kind) {
@@ -659,8 +605,8 @@ static unsigned getFixupKindNumBytes(unsigned Kind) {
}
}
-void DarwinARMAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
- unsigned DataSize, uint64_t Value) const {
+void ARMAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
+ unsigned DataSize, uint64_t Value) const {
unsigned NumBytes = getFixupKindNumBytes(Fixup.getKind());
Value = adjustFixupValue(Fixup, Value);
if (!Value) return; // Doesn't change encoding.
@@ -668,37 +614,70 @@ void DarwinARMAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
unsigned Offset = Fixup.getOffset();
assert(Offset + NumBytes <= DataSize && "Invalid fixup offset!");
- // For each byte of the fragment that the fixup touches, mask in the
- // bits from the fixup value.
+ // For each byte of the fragment that the fixup touches, mask in the bits from
+ // the fixup value. The Value has been "split up" into the appropriate
+ // bitfields above.
for (unsigned i = 0; i != NumBytes; ++i)
Data[Offset + i] |= uint8_t((Value >> (i * 8)) & 0xff);
}
+namespace {
+
+// FIXME: This should be in a separate file.
+// ELF is an ELF of course...
+class ELFARMAsmBackend : public ARMAsmBackend {
+public:
+ uint8_t OSABI;
+ ELFARMAsmBackend(const Target &T, const StringRef TT,
+ uint8_t _OSABI)
+ : ARMAsmBackend(T, TT), OSABI(_OSABI) { }
+
+ MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
+ return createARMELFObjectWriter(OS, OSABI);
+ }
+};
+
+// FIXME: This should be in a separate file.
+class DarwinARMAsmBackend : public ARMAsmBackend {
+public:
+ const object::mach::CPUSubtypeARM Subtype;
+ DarwinARMAsmBackend(const Target &T, const StringRef TT,
+ object::mach::CPUSubtypeARM st)
+ : ARMAsmBackend(T, TT), Subtype(st) {
+ HasDataInCodeSupport = true;
+ }
+
+ MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
+ return createARMMachObjectWriter(OS, /*Is64Bit=*/false,
+ object::mach::CTM_ARM,
+ Subtype);
+ }
+
+ virtual bool doesSectionRequireSymbols(const MCSection &Section) const {
+ return false;
+ }
+};
+
} // end anonymous namespace
MCAsmBackend *llvm::createARMAsmBackend(const Target &T, StringRef TT, StringRef CPU) {
Triple TheTriple(TT);
if (TheTriple.isOSDarwin()) {
- if (TheTriple.getArchName() == "armv4t" ||
- TheTriple.getArchName() == "thumbv4t")
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V4T);
- else if (TheTriple.getArchName() == "armv5e" ||
- TheTriple.getArchName() == "thumbv5e")
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V5TEJ);
- else if (TheTriple.getArchName() == "armv6" ||
- TheTriple.getArchName() == "thumbv6")
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V6);
- else if (TheTriple.getArchName() == "armv7f" ||
- TheTriple.getArchName() == "thumbv7f")
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V7F);
- else if (TheTriple.getArchName() == "armv7k" ||
- TheTriple.getArchName() == "thumbv7k")
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V7K);
- else if (TheTriple.getArchName() == "armv7s" ||
- TheTriple.getArchName() == "thumbv7s")
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V7S);
- return new DarwinARMAsmBackend(T, TT, object::mach::CSARM_V7);
+ object::mach::CPUSubtypeARM CS =
+ StringSwitch<object::mach::CPUSubtypeARM>(TheTriple.getArchName())
+ .Cases("armv4t", "thumbv4t", object::mach::CSARM_V4T)
+ .Cases("armv5e", "thumbv5e",object::mach::CSARM_V5TEJ)
+ .Cases("armv6", "thumbv6", object::mach::CSARM_V6)
+ .Cases("armv6m", "thumbv6m", object::mach::CSARM_V6M)
+ .Cases("armv7em", "thumbv7em", object::mach::CSARM_V7EM)
+ .Cases("armv7f", "thumbv7f", object::mach::CSARM_V7F)
+ .Cases("armv7k", "thumbv7k", object::mach::CSARM_V7K)
+ .Cases("armv7m", "thumbv7m", object::mach::CSARM_V7M)
+ .Cases("armv7s", "thumbv7s", object::mach::CSARM_V7S)
+ .Default(object::mach::CSARM_V7);
+
+ return new DarwinARMAsmBackend(T, TT, CS);
}
if (TheTriple.isOSWindows())
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