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//===-- AArch64MCExpr.cpp - AArch64 specific MC expression classes --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the implementation of the assembly expression modifiers
// accepted by the AArch64 architecture (e.g. ":lo12:", ":gottprel_g1:", ...).
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "aarch64mcexpr"
#include "AArch64MCExpr.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCELF.h"
#include "llvm/Object/ELF.h"
using namespace llvm;
const AArch64MCExpr*
AArch64MCExpr::Create(VariantKind Kind, const MCExpr *Expr,
MCContext &Ctx) {
return new (Ctx) AArch64MCExpr(Kind, Expr);
}
void AArch64MCExpr::PrintImpl(raw_ostream &OS) const {
switch (Kind) {
default: llvm_unreachable("Invalid kind!");
case VK_AARCH64_GOT: OS << ":got:"; break;
case VK_AARCH64_GOT_LO12: OS << ":got_lo12:"; break;
case VK_AARCH64_LO12: OS << ":lo12:"; break;
case VK_AARCH64_ABS_G0: OS << ":abs_g0:"; break;
case VK_AARCH64_ABS_G0_NC: OS << ":abs_g0_nc:"; break;
case VK_AARCH64_ABS_G1: OS << ":abs_g1:"; break;
case VK_AARCH64_ABS_G1_NC: OS << ":abs_g1_nc:"; break;
case VK_AARCH64_ABS_G2: OS << ":abs_g2:"; break;
case VK_AARCH64_ABS_G2_NC: OS << ":abs_g2_nc:"; break;
case VK_AARCH64_ABS_G3: OS << ":abs_g3:"; break;
case VK_AARCH64_SABS_G0: OS << ":abs_g0_s:"; break;
case VK_AARCH64_SABS_G1: OS << ":abs_g1_s:"; break;
case VK_AARCH64_SABS_G2: OS << ":abs_g2_s:"; break;
case VK_AARCH64_DTPREL_G2: OS << ":dtprel_g2:"; break;
case VK_AARCH64_DTPREL_G1: OS << ":dtprel_g1:"; break;
case VK_AARCH64_DTPREL_G1_NC: OS << ":dtprel_g1_nc:"; break;
case VK_AARCH64_DTPREL_G0: OS << ":dtprel_g0:"; break;
case VK_AARCH64_DTPREL_G0_NC: OS << ":dtprel_g0_nc:"; break;
case VK_AARCH64_DTPREL_HI12: OS << ":dtprel_hi12:"; break;
case VK_AARCH64_DTPREL_LO12: OS << ":dtprel_lo12:"; break;
case VK_AARCH64_DTPREL_LO12_NC: OS << ":dtprel_lo12_nc:"; break;
case VK_AARCH64_GOTTPREL_G1: OS << ":gottprel_g1:"; break;
case VK_AARCH64_GOTTPREL_G0_NC: OS << ":gottprel_g0_nc:"; break;
case VK_AARCH64_GOTTPREL: OS << ":gottprel:"; break;
case VK_AARCH64_GOTTPREL_LO12: OS << ":gottprel_lo12:"; break;
case VK_AARCH64_TPREL_G2: OS << ":tprel_g2:"; break;
case VK_AARCH64_TPREL_G1: OS << ":tprel_g1:"; break;
case VK_AARCH64_TPREL_G1_NC: OS << ":tprel_g1_nc:"; break;
case VK_AARCH64_TPREL_G0: OS << ":tprel_g0:"; break;
case VK_AARCH64_TPREL_G0_NC: OS << ":tprel_g0_nc:"; break;
case VK_AARCH64_TPREL_HI12: OS << ":tprel_hi12:"; break;
case VK_AARCH64_TPREL_LO12: OS << ":tprel_lo12:"; break;
case VK_AARCH64_TPREL_LO12_NC: OS << ":tprel_lo12_nc:"; break;
case VK_AARCH64_TLSDESC: OS << ":tlsdesc:"; break;
case VK_AARCH64_TLSDESC_LO12: OS << ":tlsdesc_lo12:"; break;
}
const MCExpr *Expr = getSubExpr();
if (Expr->getKind() != MCExpr::SymbolRef)
OS << '(';
Expr->print(OS);
if (Expr->getKind() != MCExpr::SymbolRef)
OS << ')';
}
bool
AArch64MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
const MCAsmLayout *Layout) const {
return getSubExpr()->EvaluateAsRelocatable(Res, *Layout);
}
static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
switch (Expr->getKind()) {
case MCExpr::Target:
llvm_unreachable("Can't handle nested target expression");
break;
case MCExpr::Constant:
break;
case MCExpr::Binary: {
const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr);
fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm);
fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm);
break;
}
case MCExpr::SymbolRef: {
// We're known to be under a TLS fixup, so any symbol should be
// modified. There should be only one.
const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr);
MCSymbolData &SD = Asm.getOrCreateSymbolData(SymRef.getSymbol());
MCELF::SetType(SD, ELF::STT_TLS);
break;
}
case MCExpr::Unary:
fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
break;
}
}
void AArch64MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
switch (getKind()) {
default:
return;
case VK_AARCH64_DTPREL_G2:
case VK_AARCH64_DTPREL_G1:
case VK_AARCH64_DTPREL_G1_NC:
case VK_AARCH64_DTPREL_G0:
case VK_AARCH64_DTPREL_G0_NC:
case VK_AARCH64_DTPREL_HI12:
case VK_AARCH64_DTPREL_LO12:
case VK_AARCH64_DTPREL_LO12_NC:
case VK_AARCH64_GOTTPREL_G1:
case VK_AARCH64_GOTTPREL_G0_NC:
case VK_AARCH64_GOTTPREL:
case VK_AARCH64_GOTTPREL_LO12:
case VK_AARCH64_TPREL_G2:
case VK_AARCH64_TPREL_G1:
case VK_AARCH64_TPREL_G1_NC:
case VK_AARCH64_TPREL_G0:
case VK_AARCH64_TPREL_G0_NC:
case VK_AARCH64_TPREL_HI12:
case VK_AARCH64_TPREL_LO12:
case VK_AARCH64_TPREL_LO12_NC:
case VK_AARCH64_TLSDESC:
case VK_AARCH64_TLSDESC_LO12:
break;
}
fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm);
}
// FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
// that method should be made public?
// FIXME: really do above: now that two 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 AArch64MCExpr::AddValueSymbols(MCAssembler *Asm) const {
AddValueSymbolsImpl(getSubExpr(), Asm);
}
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