1 //===-- HexagonMCExpr.cpp - Hexagon specific MC expression classes 2 //----------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "HexagonMCExpr.h" 11 #include "llvm/BinaryFormat/ELF.h" 12 #include "llvm/MC/MCContext.h" 13 #include "llvm/MC/MCStreamer.h" 14 #include "llvm/MC/MCSymbolELF.h" 15 #include "llvm/MC/MCValue.h" 16 #include "llvm/Support/raw_ostream.h" 17 18 using namespace llvm; 19 20 #define DEBUG_TYPE "hexagon-mcexpr" 21 22 HexagonMCExpr *HexagonMCExpr::create(MCExpr const *Expr, MCContext &Ctx) { 23 return new (Ctx) HexagonMCExpr(Expr); 24 } 25 26 bool HexagonMCExpr::evaluateAsRelocatableImpl(MCValue &Res, 27 MCAsmLayout const *Layout, 28 MCFixup const *Fixup) const { 29 return Expr->evaluateAsRelocatable(Res, Layout, Fixup); 30 } 31 32 void HexagonMCExpr::visitUsedExpr(MCStreamer &Streamer) const { 33 Streamer.visitUsedExpr(*Expr); 34 } 35 36 MCFragment *llvm::HexagonMCExpr::findAssociatedFragment() const { 37 return Expr->findAssociatedFragment(); 38 } 39 40 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) { 41 switch (Expr->getKind()) { 42 case MCExpr::Target: 43 llvm_unreachable("Cannot handle nested target MCExpr"); 44 break; 45 case MCExpr::Constant: 46 break; 47 48 case MCExpr::Binary: { 49 const MCBinaryExpr *be = cast<MCBinaryExpr>(Expr); 50 fixELFSymbolsInTLSFixupsImpl(be->getLHS(), Asm); 51 fixELFSymbolsInTLSFixupsImpl(be->getRHS(), Asm); 52 break; 53 } 54 case MCExpr::SymbolRef: { 55 const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(Expr); 56 switch (symRef.getKind()) { 57 default: 58 return; 59 case MCSymbolRefExpr::VK_Hexagon_GD_GOT: 60 case MCSymbolRefExpr::VK_Hexagon_LD_GOT: 61 case MCSymbolRefExpr::VK_Hexagon_GD_PLT: 62 case MCSymbolRefExpr::VK_Hexagon_LD_PLT: 63 case MCSymbolRefExpr::VK_Hexagon_IE: 64 case MCSymbolRefExpr::VK_Hexagon_IE_GOT: 65 case MCSymbolRefExpr::VK_TPREL: 66 break; 67 } 68 cast<MCSymbolELF>(symRef.getSymbol()).setType(ELF::STT_TLS); 69 break; 70 } 71 case MCExpr::Unary: 72 fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm); 73 break; 74 } 75 } 76 77 void HexagonMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const { 78 auto expr = getExpr(); 79 fixELFSymbolsInTLSFixupsImpl(expr, Asm); 80 } 81 82 MCExpr const *HexagonMCExpr::getExpr() const { return Expr; } 83 84 void HexagonMCExpr::setMustExtend(bool Val) { 85 assert((!Val || !MustNotExtend) && "Extension contradiction"); 86 MustExtend = Val; 87 } 88 89 bool HexagonMCExpr::mustExtend() const { return MustExtend; } 90 void HexagonMCExpr::setMustNotExtend(bool Val) { 91 assert((!Val || !MustExtend) && "Extension contradiction"); 92 MustNotExtend = Val; 93 } 94 bool HexagonMCExpr::mustNotExtend() const { return MustNotExtend; } 95 96 bool HexagonMCExpr::s27_2_reloc() const { return S27_2_reloc; } 97 void HexagonMCExpr::setS27_2_reloc(bool Val) { 98 S27_2_reloc = Val; 99 } 100 101 bool HexagonMCExpr::classof(MCExpr const *E) { 102 return E->getKind() == MCExpr::Target; 103 } 104 105 HexagonMCExpr::HexagonMCExpr(MCExpr const *Expr) 106 : Expr(Expr), MustNotExtend(false), MustExtend(false), S27_2_reloc(false), 107 SignMismatch(false) {} 108 109 void HexagonMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const { 110 Expr->print(OS, MAI); 111 } 112 113 void HexagonMCExpr::setSignMismatch(bool Val) { 114 SignMismatch = Val; 115 } 116 117 bool HexagonMCExpr::signMismatch() const { 118 return SignMismatch; 119 } 120