mirror of
https://github.com/c64scene-ar/llvm-6502.git
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5bd6cb2dab
Only comments affected. No code change at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175169 91177308-0d34-0410-b5e6-96231b3b80d8
179 lines
6.2 KiB
C++
179 lines
6.2 KiB
C++
//===-- AArch64MCExpr.cpp - AArch64 specific MC expression classes --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the implementation of the assembly expression modifiers
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// accepted by the AArch64 architecture (e.g. ":lo12:", ":gottprel_g1:", ...).
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "aarch64mcexpr"
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#include "AArch64MCExpr.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCELF.h"
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#include "llvm/Object/ELF.h"
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using namespace llvm;
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const AArch64MCExpr*
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AArch64MCExpr::Create(VariantKind Kind, const MCExpr *Expr,
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MCContext &Ctx) {
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return new (Ctx) AArch64MCExpr(Kind, Expr);
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}
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void AArch64MCExpr::PrintImpl(raw_ostream &OS) const {
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switch (Kind) {
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default: llvm_unreachable("Invalid kind!");
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case VK_AARCH64_GOT: OS << ":got:"; break;
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case VK_AARCH64_GOT_LO12: OS << ":got_lo12:"; break;
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case VK_AARCH64_LO12: OS << ":lo12:"; break;
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case VK_AARCH64_ABS_G0: OS << ":abs_g0:"; break;
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case VK_AARCH64_ABS_G0_NC: OS << ":abs_g0_nc:"; break;
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case VK_AARCH64_ABS_G1: OS << ":abs_g1:"; break;
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case VK_AARCH64_ABS_G1_NC: OS << ":abs_g1_nc:"; break;
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case VK_AARCH64_ABS_G2: OS << ":abs_g2:"; break;
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case VK_AARCH64_ABS_G2_NC: OS << ":abs_g2_nc:"; break;
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case VK_AARCH64_ABS_G3: OS << ":abs_g3:"; break;
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case VK_AARCH64_SABS_G0: OS << ":abs_g0_s:"; break;
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case VK_AARCH64_SABS_G1: OS << ":abs_g1_s:"; break;
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case VK_AARCH64_SABS_G2: OS << ":abs_g2_s:"; break;
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case VK_AARCH64_DTPREL_G2: OS << ":dtprel_g2:"; break;
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case VK_AARCH64_DTPREL_G1: OS << ":dtprel_g1:"; break;
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case VK_AARCH64_DTPREL_G1_NC: OS << ":dtprel_g1_nc:"; break;
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case VK_AARCH64_DTPREL_G0: OS << ":dtprel_g0:"; break;
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case VK_AARCH64_DTPREL_G0_NC: OS << ":dtprel_g0_nc:"; break;
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case VK_AARCH64_DTPREL_HI12: OS << ":dtprel_hi12:"; break;
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case VK_AARCH64_DTPREL_LO12: OS << ":dtprel_lo12:"; break;
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case VK_AARCH64_DTPREL_LO12_NC: OS << ":dtprel_lo12_nc:"; break;
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case VK_AARCH64_GOTTPREL_G1: OS << ":gottprel_g1:"; break;
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case VK_AARCH64_GOTTPREL_G0_NC: OS << ":gottprel_g0_nc:"; break;
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case VK_AARCH64_GOTTPREL: OS << ":gottprel:"; break;
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case VK_AARCH64_GOTTPREL_LO12: OS << ":gottprel_lo12:"; break;
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case VK_AARCH64_TPREL_G2: OS << ":tprel_g2:"; break;
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case VK_AARCH64_TPREL_G1: OS << ":tprel_g1:"; break;
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case VK_AARCH64_TPREL_G1_NC: OS << ":tprel_g1_nc:"; break;
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case VK_AARCH64_TPREL_G0: OS << ":tprel_g0:"; break;
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case VK_AARCH64_TPREL_G0_NC: OS << ":tprel_g0_nc:"; break;
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case VK_AARCH64_TPREL_HI12: OS << ":tprel_hi12:"; break;
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case VK_AARCH64_TPREL_LO12: OS << ":tprel_lo12:"; break;
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case VK_AARCH64_TPREL_LO12_NC: OS << ":tprel_lo12_nc:"; break;
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case VK_AARCH64_TLSDESC: OS << ":tlsdesc:"; break;
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case VK_AARCH64_TLSDESC_LO12: OS << ":tlsdesc_lo12:"; break;
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}
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const MCExpr *Expr = getSubExpr();
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if (Expr->getKind() != MCExpr::SymbolRef)
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OS << '(';
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Expr->print(OS);
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if (Expr->getKind() != MCExpr::SymbolRef)
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OS << ')';
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}
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bool
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AArch64MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
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const MCAsmLayout *Layout) const {
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return getSubExpr()->EvaluateAsRelocatable(Res, *Layout);
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}
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static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
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switch (Expr->getKind()) {
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case MCExpr::Target:
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llvm_unreachable("Can't handle nested target expression");
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break;
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case MCExpr::Constant:
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break;
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case MCExpr::Binary: {
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const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr);
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fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm);
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fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm);
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break;
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}
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case MCExpr::SymbolRef: {
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// We're known to be under a TLS fixup, so any symbol should be
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// modified. There should be only one.
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const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr);
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MCSymbolData &SD = Asm.getOrCreateSymbolData(SymRef.getSymbol());
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MCELF::SetType(SD, ELF::STT_TLS);
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break;
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}
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case MCExpr::Unary:
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fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
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break;
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}
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}
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void AArch64MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
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switch (getKind()) {
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default:
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return;
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case VK_AARCH64_DTPREL_G2:
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case VK_AARCH64_DTPREL_G1:
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case VK_AARCH64_DTPREL_G1_NC:
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case VK_AARCH64_DTPREL_G0:
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case VK_AARCH64_DTPREL_G0_NC:
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case VK_AARCH64_DTPREL_HI12:
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case VK_AARCH64_DTPREL_LO12:
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case VK_AARCH64_DTPREL_LO12_NC:
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case VK_AARCH64_GOTTPREL_G1:
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case VK_AARCH64_GOTTPREL_G0_NC:
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case VK_AARCH64_GOTTPREL:
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case VK_AARCH64_GOTTPREL_LO12:
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case VK_AARCH64_TPREL_G2:
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case VK_AARCH64_TPREL_G1:
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case VK_AARCH64_TPREL_G1_NC:
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case VK_AARCH64_TPREL_G0:
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case VK_AARCH64_TPREL_G0_NC:
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case VK_AARCH64_TPREL_HI12:
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case VK_AARCH64_TPREL_LO12:
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case VK_AARCH64_TPREL_LO12_NC:
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case VK_AARCH64_TLSDESC:
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case VK_AARCH64_TLSDESC_LO12:
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break;
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}
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fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm);
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}
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// FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
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// that method should be made public?
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// FIXME: really do above: now that two backends are using it.
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static void AddValueSymbolsImpl(const MCExpr *Value, MCAssembler *Asm) {
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switch (Value->getKind()) {
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case MCExpr::Target:
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llvm_unreachable("Can't handle nested target expr!");
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break;
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case MCExpr::Constant:
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break;
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case MCExpr::Binary: {
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const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
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AddValueSymbolsImpl(BE->getLHS(), Asm);
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AddValueSymbolsImpl(BE->getRHS(), Asm);
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break;
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}
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case MCExpr::SymbolRef:
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Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
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break;
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case MCExpr::Unary:
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AddValueSymbolsImpl(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
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break;
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}
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}
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void AArch64MCExpr::AddValueSymbols(MCAssembler *Asm) const {
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AddValueSymbolsImpl(getSubExpr(), Asm);
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}
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