RISCVAsmBackend.cpp File Reference

#include "RISCVAsmBackend.h"
#include "RISCVFixupKinds.h"
#include "llvm/ADT/APInt.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/BinaryFormat/ELFRelocs/RISCV.def"
#include "llvm/BinaryFormat/ELFRelocs/RISCV_nonstandard.def"

Go to the source code of this file.

Macros
#define	ELF_RELOC(NAME, ID)
#define	ELF_RISCV_NONSTANDARD_RELOC(_VENDOR, NAME, ID)

Functions
static unsigned	getRelaxedOpcode (unsigned Opcode, ArrayRef< MCOperand > Operands, const MCSubtargetInfo &STI)
static uint64_t	adjustFixupValue (const MCFixup &Fixup, uint64_t Value, MCContext &Ctx)
static const MCFixup *	getPCRelHiFixup (const MCSpecifierExpr &Expr, const MCFragment **DFOut)
static bool	relaxableFixupNeedsRelocation (const MCFixupKind Kind)
static bool	isDataFixup (unsigned Kind)

Variables
static cl::opt< bool >	ULEB128Reloc ("riscv-uleb128-reloc", cl::init(true), cl::Hidden, cl::desc("Emit R_RISCV_SET_ULEB128/E_RISCV_SUB_ULEB128 if appropriate"))
static cl::opt< bool >	AlignRvc ("riscv-align-rvc", cl::init(true), cl::Hidden, cl::desc("When generating R_RISCV_ALIGN, insert $alignment-2 " "bytes of NOPs even in norvc code"))

Macro Definition Documentation

ELF_RELOC

#define ELF_RELOC	(		NAME,
			ID )

Value:

.Case(#NAME, ID)

ELF_RISCV_NONSTANDARD_RELOC

#define ELF_RISCV_NONSTANDARD_RELOC	(		_VENDOR,
			NAME,
			ID )

Value:

.Case(#NAME, ID)

Function Documentation

adjustFixupValue()

uint64_t adjustFixupValue ( const MCFixup & Fixup, uint64_t Value, MCContext & Ctx )

static

Definition at line 496 of file RISCVAsmBackend.cpp.

References Fixup, llvm::RISCV::fixup_riscv_12_i, llvm::RISCV::fixup_riscv_branch, llvm::RISCV::fixup_riscv_call, llvm::RISCV::fixup_riscv_call_plt, llvm::RISCV::fixup_riscv_hi20, llvm::RISCV::fixup_riscv_jal, llvm::RISCV::fixup_riscv_lo12_i, llvm::RISCV::fixup_riscv_lo12_s, llvm::RISCV::fixup_riscv_nds_branch_10, llvm::RISCV::fixup_riscv_pcrel_hi20, llvm::RISCV::fixup_riscv_pcrel_lo12_i, llvm::RISCV::fixup_riscv_pcrel_lo12_s, llvm::RISCV::fixup_riscv_qc_abs20_u, llvm::RISCV::fixup_riscv_qc_e_32, llvm::RISCV::fixup_riscv_qc_e_branch, llvm::RISCV::fixup_riscv_qc_e_call_plt, llvm::RISCV::fixup_riscv_rvc_branch, llvm::RISCV::fixup_riscv_rvc_imm, llvm::RISCV::fixup_riscv_rvc_jump, llvm::FK_Data_1, llvm::FK_Data_2, llvm::FK_Data_4, llvm::FK_Data_8, llvm::FK_Data_leb128, llvm::isInt(), and llvm_unreachable.

getPCRelHiFixup()

const MCFixup * getPCRelHiFixup ( const MCSpecifierExpr & Expr, const MCFragment ** DFOut )

static

Definition at line 677 of file RISCVAsmBackend.cpp.

References DF, llvm::MCExpr::evaluateAsRelocatable(), F, llvm::RISCV::fixup_riscv_pcrel_hi20, llvm::MCValue::getAddSym(), llvm::MCSymbol::getFragment(), llvm::MCSymbol::getOffset(), llvm::MCSpecifierExpr::getSubExpr(), llvm::mc::isRelocation(), and llvm::Offset.

Referenced by llvm::RISCVAsmBackend::evaluateFixup().

getRelaxedOpcode()

unsigned getRelaxedOpcode ( unsigned Opcode, ArrayRef< MCOperand > Operands, const MCSubtargetInfo & STI )

static

Definition at line 156 of file RISCVAsmBackend.cpp.

References llvm::MCSubtargetInfo::hasFeature(), and Reg.

isDataFixup()

bool isDataFixup ( unsigned Kind )

static

Definition at line 909 of file RISCVAsmBackend.cpp.

References llvm::FK_Data_1, llvm::FK_Data_2, llvm::FK_Data_4, and llvm::FK_Data_8.

Referenced by llvm::RISCVAsmBackend::applyFixup().

relaxableFixupNeedsRelocation()

bool relaxableFixupNeedsRelocation ( const MCFixupKind Kind )

static

Definition at line 815 of file RISCVAsmBackend.cpp.

References llvm::RISCV::fixup_riscv_jal, llvm::RISCV::fixup_riscv_rvc_branch, llvm::RISCV::fixup_riscv_rvc_imm, and llvm::RISCV::fixup_riscv_rvc_jump.

Referenced by llvm::RISCVAsmBackend::addReloc().

Variable Documentation

AlignRvc

cl::opt< bool > AlignRvc("riscv-align-rvc", cl::init(true), cl::Hidden, cl::desc("When generating R_RISCV_ALIGN, insert $alignment-2 " "bytes of NOPs even in norvc code")) ( "riscv-align-rvc" , cl::init(true) , cl::Hidden , cl::desc("When generating R_RISCV_ALIGN, insert $alignment-2 " "bytes of NOPs even in norvc code")  )

static

Referenced by llvm::RISCVAsmBackend::relaxAlign().

ULEB128Reloc

cl::opt< bool > ULEB128Reloc("riscv-uleb128-reloc", cl::init(true), cl::Hidden, cl::desc("Emit R_RISCV_SET_ULEB128/E_RISCV_SUB_ULEB128 if appropriate")) ( "riscv-uleb128-reloc" , cl::init(true) , cl::Hidden , cl::desc("Emit R_RISCV_SET_ULEB128/E_RISCV_SUB_ULEB128 if appropriate")  )

static

Referenced by llvm::RISCVAsmBackend::relaxLEB128().