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freebsd-dev/contrib/llvm/patches/patch-r262261-llvm-r198580-sparc.diff
Dimitry Andric a1f8ad145e Add separate patch files for all the customizations we have currently 
applied to our copy of llvm/clang.  These can be applied in alphabetical
order to a pristine llvm/clang 3.4 release source tree, to result in the
same version used in FreeBSD.

This is intended to clearly document all the changes until now, which
mostly consist of cherry pickings from the respective upstream trunks,
plus a number of hand-written FreeBSD-specific ones.  Hopefully those
can eventually be cleaned up and sent upstream too.

MFC after:	1 week
X-MFC-With:	r263313
2014-03-18 22:07:45 +00:00

461 lines
17 KiB
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Pull in r198580 from upstream llvm trunk (by Venkatraman Govindaraju):
[Sparc] Add ELF Object Writer for Sparc.
Introduced here: http://svn.freebsd.org/changeset/base/262261
Index: lib/Target/Sparc/MCTargetDesc/SparcMCCodeEmitter.cpp
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcMCCodeEmitter.cpp
+++ lib/Target/Sparc/MCTargetDesc/SparcMCCodeEmitter.cpp
@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "mccodeemitter"
+#include "SparcMCExpr.h"
#include "SparcMCTargetDesc.h"
#include "MCTargetDesc/SparcFixupKinds.h"
#include "llvm/MC/MCCodeEmitter.h"
@@ -92,6 +93,41 @@ getMachineOpValue(const MCInst &MI, const MCOperan
assert(MO.isExpr());
const MCExpr *Expr = MO.getExpr();
+ if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(Expr)) {
+ switch(SExpr->getKind()) {
+ default: assert(0 && "Unhandled sparc expression!"); break;
+ case SparcMCExpr::VK_Sparc_LO:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_lo10));
+ break;
+ case SparcMCExpr::VK_Sparc_HI:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_hi22));
+ break;
+ case SparcMCExpr::VK_Sparc_H44:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_h44));
+ break;
+ case SparcMCExpr::VK_Sparc_M44:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_m44));
+ break;
+ case SparcMCExpr::VK_Sparc_L44:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_l44));
+ break;
+ case SparcMCExpr::VK_Sparc_HH:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_hh));
+ break;
+ case SparcMCExpr::VK_Sparc_HM:
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ (MCFixupKind)Sparc::fixup_sparc_hm));
+ break;
+ }
+ return 0;
+ }
+
int64_t Res;
if (Expr->EvaluateAsAbsolute(Res))
return Res;
Index: lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.cpp
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.cpp
+++ lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.cpp
@@ -89,6 +89,14 @@ static MCCodeGenInfo *createSparcV9MCCodeGenInfo(S
return X;
}
+static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
+ MCContext &Context, MCAsmBackend &MAB,
+ raw_ostream &OS, MCCodeEmitter *Emitter,
+ bool RelaxAll, bool NoExecStack) {
+ SparcTargetELFStreamer *S = new SparcTargetELFStreamer();
+ return createELFStreamer(Context, S, MAB, OS, Emitter, RelaxAll, NoExecStack);
+}
+
static MCStreamer *
createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
bool isVerboseAsm, bool useLoc, bool useCFI,
@@ -148,6 +156,13 @@ extern "C" void LLVMInitializeSparcTargetMC() {
TargetRegistry::RegisterMCAsmBackend(TheSparcV9Target,
createSparcAsmBackend);
+ // Register the object streamer.
+ TargetRegistry::RegisterMCObjectStreamer(TheSparcTarget,
+ createMCStreamer);
+ TargetRegistry::RegisterMCObjectStreamer(TheSparcV9Target,
+ createMCStreamer);
+
+ // Register the asm streamer.
TargetRegistry::RegisterAsmStreamer(TheSparcTarget,
createMCAsmStreamer);
TargetRegistry::RegisterAsmStreamer(TheSparcV9Target,
Index: lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp
+++ lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp
@@ -10,6 +10,7 @@
#include "llvm/MC/MCAsmBackend.h"
#include "MCTargetDesc/SparcMCTargetDesc.h"
#include "MCTargetDesc/SparcFixupKinds.h"
+#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCFixupKindInfo.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/Support/TargetRegistry.h"
@@ -16,11 +17,43 @@
using namespace llvm;
+static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
+ switch (Kind) {
+ default:
+ llvm_unreachable("Unknown fixup kind!");
+ case FK_Data_1:
+ case FK_Data_2:
+ case FK_Data_4:
+ case FK_Data_8:
+ return Value;
+ case Sparc::fixup_sparc_call30:
+ return Value & 0x3fffffff;
+ case Sparc::fixup_sparc_br22:
+ return Value & 0x3fffff;
+ case Sparc::fixup_sparc_br19:
+ return Value & 0x1ffff;
+ case Sparc::fixup_sparc_hi22:
+ return (Value >> 10) & 0x3fffff;
+ case Sparc::fixup_sparc_lo10:
+ return Value & 0x3ff;
+ case Sparc::fixup_sparc_h44:
+ return (Value >> 22) & 0x3fffff;
+ case Sparc::fixup_sparc_m44:
+ return (Value >> 12) & 0x3ff;
+ case Sparc::fixup_sparc_l44:
+ return Value & 0xfff;
+ case Sparc::fixup_sparc_hh:
+ return (Value >> 42) & 0x3fffff;
+ case Sparc::fixup_sparc_hm:
+ return (Value >>32) & 0x3ff;
+ }
+}
+
namespace {
class SparcAsmBackend : public MCAsmBackend {
-
+ const Target &TheTarget;
public:
- SparcAsmBackend(const Target &T) : MCAsmBackend() {}
+ SparcAsmBackend(const Target &T) : MCAsmBackend(), TheTarget(T) {}
unsigned getNumFixupKinds() const {
return Sparc::NumTargetFixupKinds;
@@ -31,7 +64,14 @@ namespace {
// name offset bits flags
{ "fixup_sparc_call30", 0, 30, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_sparc_br22", 0, 22, MCFixupKindInfo::FKF_IsPCRel },
- { "fixup_sparc_br19", 0, 19, MCFixupKindInfo::FKF_IsPCRel }
+ { "fixup_sparc_br19", 0, 19, MCFixupKindInfo::FKF_IsPCRel },
+ { "fixup_sparc_hi22", 0, 22, 0 },
+ { "fixup_sparc_lo10", 0, 10, 0 },
+ { "fixup_sparc_h44", 0, 22, 0 },
+ { "fixup_sparc_m44", 0, 10, 0 },
+ { "fixup_sparc_l44", 0, 12, 0 },
+ { "fixup_sparc_hh", 0, 21, 0 },
+ { "fixup_sparc_hm", 0, 10, 0 },
};
if (Kind < FirstTargetFixupKind)
@@ -68,21 +108,38 @@ namespace {
OW->Write8(0);
return true;
}
+
+ bool is64Bit() const {
+ StringRef name = TheTarget.getName();
+ return name == "sparcv9";
+ }
};
class ELFSparcAsmBackend : public SparcAsmBackend {
+ Triple::OSType OSType;
public:
ELFSparcAsmBackend(const Target &T, Triple::OSType OSType) :
- SparcAsmBackend(T) { }
+ SparcAsmBackend(T), OSType(OSType) { }
void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
uint64_t Value) const {
- assert(0 && "applyFixup not implemented yet");
+
+ Value = adjustFixupValue(Fixup.getKind(), 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 != 4; ++i)
+ Data[Offset + i] |= uint8_t((Value >> ((4 - i - 1)*8)) & 0xff);
+
}
MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
- assert(0 && "Object Writer not implemented yet");
- return 0;
+ uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(OSType);
+ return createSparcELFObjectWriter(OS, is64Bit(), OSABI);
}
virtual bool doesSectionRequireSymbols(const MCSection &Section) const {
Index: lib/Target/Sparc/MCTargetDesc/SparcFixupKinds.h
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcFixupKinds.h
+++ lib/Target/Sparc/MCTargetDesc/SparcFixupKinds.h
@@ -22,10 +22,32 @@ namespace llvm {
/// branches
fixup_sparc_br22,
- /// fixup_sparc_br22 - 22-bit PC relative relocation for
+ /// fixup_sparc_br19 - 19-bit PC relative relocation for
/// branches on icc/xcc
fixup_sparc_br19,
+ /// fixup_sparc_hi22 - 22-bit fixup corresponding to %hi(foo)
+ /// for sethi
+ fixup_sparc_hi22,
+
+ /// fixup_sparc_lo10 - 10-bit fixup corresponding to %lo(foo)
+ fixup_sparc_lo10,
+
+ /// fixup_sparc_h44 - 22-bit fixup corresponding to %h44(foo)
+ fixup_sparc_h44,
+
+ /// fixup_sparc_m44 - 10-bit fixup corresponding to %m44(foo)
+ fixup_sparc_m44,
+
+ /// fixup_sparc_l44 - 12-bit fixup corresponding to %l44(foo)
+ fixup_sparc_l44,
+
+ /// fixup_sparc_hh - 22-bit fixup corresponding to %hh(foo)
+ fixup_sparc_hh,
+
+ /// fixup_sparc_hm - 10-bit fixup corresponding to %hm(foo)
+ fixup_sparc_hm,
+
// Marker
LastTargetFixupKind,
NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind
Index: lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
+++ lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
@@ -0,0 +1,86 @@
+//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/SparcMCTargetDesc.h"
+#include "MCTargetDesc/SparcFixupKinds.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace llvm;
+
+namespace {
+ class SparcELFObjectWriter : public MCELFObjectTargetWriter {
+ public:
+ SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI)
+ : MCELFObjectTargetWriter(Is64Bit, OSABI,
+ Is64Bit ? ELF::EM_SPARCV9 : ELF::EM_SPARC,
+ /*HasRelocationAddend*/ true) {}
+
+ virtual ~SparcELFObjectWriter() {}
+ protected:
+ virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
+ bool IsPCRel, bool IsRelocWithSymbol,
+ int64_t Addend) const;
+
+ };
+}
+
+
+unsigned SparcELFObjectWriter::GetRelocType(const MCValue &Target,
+ const MCFixup &Fixup,
+ bool IsPCRel,
+ bool IsRelocWithSymbol,
+ int64_t Addend) const {
+ if (IsPCRel) {
+ switch((unsigned)Fixup.getKind()) {
+ default:
+ llvm_unreachable("Unimplemented fixup -> relocation");
+ case FK_Data_1: return ELF::R_SPARC_DISP8;
+ case FK_Data_2: return ELF::R_SPARC_DISP16;
+ case FK_Data_4: return ELF::R_SPARC_DISP32;
+ case FK_Data_8: return ELF::R_SPARC_DISP64;
+ case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30;
+ case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22;
+ case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19;
+ }
+ }
+
+ switch((unsigned)Fixup.getKind()) {
+ default:
+ llvm_unreachable("Unimplemented fixup -> relocation");
+ case FK_Data_1: return ELF::R_SPARC_8;
+ case FK_Data_2: return ((Fixup.getOffset() % 2)
+ ? ELF::R_SPARC_UA16
+ : ELF::R_SPARC_16);
+ case FK_Data_4: return ((Fixup.getOffset() % 4)
+ ? ELF::R_SPARC_UA32
+ : ELF::R_SPARC_32);
+ case FK_Data_8: return ((Fixup.getOffset() % 8)
+ ? ELF::R_SPARC_UA64
+ : ELF::R_SPARC_64);
+ case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22;
+ case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10;
+ case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44;
+ case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44;
+ case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44;
+ case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22;
+ case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10;
+ }
+ return ELF::R_SPARC_NONE;
+}
+
+MCObjectWriter *llvm::createSparcELFObjectWriter(raw_ostream &OS,
+ bool Is64Bit,
+ uint8_t OSABI) {
+ MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI);
+ return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
+}
Index: lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.h
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.h
+++ lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.h
@@ -14,15 +14,19 @@
#ifndef SPARCMCTARGETDESC_H
#define SPARCMCTARGETDESC_H
+#include "llvm/Support/DataTypes.h"
+
namespace llvm {
class MCAsmBackend;
class MCCodeEmitter;
class MCContext;
class MCInstrInfo;
+class MCObjectWriter;
class MCRegisterInfo;
class MCSubtargetInfo;
class Target;
class StringRef;
+class raw_ostream;
extern Target TheSparcTarget;
extern Target TheSparcV9Target;
@@ -35,7 +39,9 @@ MCAsmBackend *createSparcAsmBackend(const Target &
const MCRegisterInfo &MRI,
StringRef TT,
StringRef CPU);
-
+MCObjectWriter *createSparcELFObjectWriter(raw_ostream &OS,
+ bool Is64Bit,
+ uint8_t OSABI);
} // End llvm namespace
// Defines symbolic names for Sparc registers. This defines a mapping from
Index: lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp
===================================================================
--- lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp
+++ lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp
@@ -70,15 +70,67 @@ void SparcMCExpr::PrintImpl(raw_ostream &OS) const
bool
SparcMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
const MCAsmLayout *Layout) const {
- assert(0 && "FIXME: Implement SparcMCExpr::EvaluateAsRelocatableImpl");
return getSubExpr()->EvaluateAsRelocatable(Res, *Layout);
}
+static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
+ assert(0 && "Implement fixELFSymbolsInTLSFixupsImpl!");
+}
void SparcMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
- assert(0 && "FIXME: Implement SparcMCExpr::fixELFSymbolsInTLSFixups");
+ switch(getKind()) {
+ default: return;
+ case VK_Sparc_TLS_GD_HI22:
+ case VK_Sparc_TLS_GD_LO10:
+ case VK_Sparc_TLS_GD_ADD:
+ case VK_Sparc_TLS_GD_CALL:
+ case VK_Sparc_TLS_LDM_HI22:
+ case VK_Sparc_TLS_LDM_LO10:
+ case VK_Sparc_TLS_LDM_ADD:
+ case VK_Sparc_TLS_LDM_CALL:
+ case VK_Sparc_TLS_LDO_HIX22:
+ case VK_Sparc_TLS_LDO_LOX10:
+ case VK_Sparc_TLS_LDO_ADD:
+ case VK_Sparc_TLS_IE_HI22:
+ case VK_Sparc_TLS_IE_LO10:
+ case VK_Sparc_TLS_IE_LD:
+ case VK_Sparc_TLS_IE_LDX:
+ case VK_Sparc_TLS_IE_ADD:
+ case VK_Sparc_TLS_LE_HIX22:
+ case VK_Sparc_TLS_LE_LOX10: break;
+ }
+ fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm);
}
+// FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
+// that method should be made public?
+// FIXME: really do above: now that at least three other backends are using it.
+static void AddValueSymbolsImpl(const MCExpr *Value, MCAssembler *Asm) {
+ switch (Value->getKind()) {
+ case MCExpr::Target:
+ llvm_unreachable("Can't handle nested target expr!");
+ break;
+
+ case MCExpr::Constant:
+ break;
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
+ AddValueSymbolsImpl(BE->getLHS(), Asm);
+ AddValueSymbolsImpl(BE->getRHS(), Asm);
+ break;
+ }
+
+ case MCExpr::SymbolRef:
+ Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
+ break;
+
+ case MCExpr::Unary:
+ AddValueSymbolsImpl(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
+ break;
+ }
+}
+
void SparcMCExpr::AddValueSymbols(MCAssembler *Asm) const {
- assert(0 && "FIXME: Implement SparcMCExpr::AddValueSymbols");
+ AddValueSymbolsImpl(getSubExpr(), Asm);
}
Index: lib/Target/Sparc/MCTargetDesc/CMakeLists.txt
===================================================================
--- lib/Target/Sparc/MCTargetDesc/CMakeLists.txt
+++ lib/Target/Sparc/MCTargetDesc/CMakeLists.txt
@@ -1,5 +1,6 @@
add_llvm_library(LLVMSparcDesc
SparcAsmBackend.cpp
+ SparcELFObjectWriter.cpp
SparcMCAsmInfo.cpp
SparcMCCodeEmitter.cpp
SparcMCTargetDesc.cpp
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