1 //===-- SparcMCExpr.cpp - Sparc specific MC expression classes --------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains the implementation of the assembly expression modifiers 10 // accepted by the Sparc architecture (e.g. "%hi", "%lo", ...). 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "SparcMCExpr.h" 15 #include "llvm/BinaryFormat/ELF.h" 16 #include "llvm/MC/MCAssembler.h" 17 #include "llvm/MC/MCContext.h" 18 #include "llvm/MC/MCObjectStreamer.h" 19 #include "llvm/MC/MCSymbolELF.h" 20 21 using namespace llvm; 22 23 #define DEBUG_TYPE "sparcmcexpr" 24 25 const SparcMCExpr* 26 SparcMCExpr::create(VariantKind Kind, const MCExpr *Expr, 27 MCContext &Ctx) { 28 return new (Ctx) SparcMCExpr(Kind, Expr); 29 } 30 31 void SparcMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const { 32 33 bool closeParen = printVariantKind(OS, Kind); 34 35 const MCExpr *Expr = getSubExpr(); 36 Expr->print(OS, MAI); 37 38 if (closeParen) 39 OS << ')'; 40 } 41 42 bool SparcMCExpr::printVariantKind(raw_ostream &OS, VariantKind Kind) 43 { 44 switch (Kind) { 45 case VK_Sparc_None: return false; 46 case VK_Sparc_LO: OS << "%lo("; return true; 47 case VK_Sparc_HI: OS << "%hi("; return true; 48 case VK_Sparc_H44: OS << "%h44("; return true; 49 case VK_Sparc_M44: OS << "%m44("; return true; 50 case VK_Sparc_L44: OS << "%l44("; return true; 51 case VK_Sparc_HH: OS << "%hh("; return true; 52 case VK_Sparc_HM: OS << "%hm("; return true; 53 case VK_Sparc_LM: OS << "%lm("; return true; 54 // FIXME: use %pc22/%pc10, if system assembler supports them. 55 case VK_Sparc_PC22: OS << "%hi("; return true; 56 case VK_Sparc_PC10: OS << "%lo("; return true; 57 // FIXME: use %got22/%got10, if system assembler supports them. 58 case VK_Sparc_GOT22: OS << "%hi("; return true; 59 case VK_Sparc_GOT10: OS << "%lo("; return true; 60 case VK_Sparc_GOT13: return false; 61 case VK_Sparc_13: return false; 62 case VK_Sparc_WDISP30: return false; 63 case VK_Sparc_WPLT30: return false; 64 case VK_Sparc_R_DISP32: OS << "%r_disp32("; return true; 65 case VK_Sparc_TLS_GD_HI22: OS << "%tgd_hi22("; return true; 66 case VK_Sparc_TLS_GD_LO10: OS << "%tgd_lo10("; return true; 67 case VK_Sparc_TLS_GD_ADD: OS << "%tgd_add("; return true; 68 case VK_Sparc_TLS_GD_CALL: OS << "%tgd_call("; return true; 69 case VK_Sparc_TLS_LDM_HI22: OS << "%tldm_hi22("; return true; 70 case VK_Sparc_TLS_LDM_LO10: OS << "%tldm_lo10("; return true; 71 case VK_Sparc_TLS_LDM_ADD: OS << "%tldm_add("; return true; 72 case VK_Sparc_TLS_LDM_CALL: OS << "%tldm_call("; return true; 73 case VK_Sparc_TLS_LDO_HIX22: OS << "%tldo_hix22("; return true; 74 case VK_Sparc_TLS_LDO_LOX10: OS << "%tldo_lox10("; return true; 75 case VK_Sparc_TLS_LDO_ADD: OS << "%tldo_add("; return true; 76 case VK_Sparc_TLS_IE_HI22: OS << "%tie_hi22("; return true; 77 case VK_Sparc_TLS_IE_LO10: OS << "%tie_lo10("; return true; 78 case VK_Sparc_TLS_IE_LD: OS << "%tie_ld("; return true; 79 case VK_Sparc_TLS_IE_LDX: OS << "%tie_ldx("; return true; 80 case VK_Sparc_TLS_IE_ADD: OS << "%tie_add("; return true; 81 case VK_Sparc_TLS_LE_HIX22: OS << "%tle_hix22("; return true; 82 case VK_Sparc_TLS_LE_LOX10: OS << "%tle_lox10("; return true; 83 } 84 llvm_unreachable("Unhandled SparcMCExpr::VariantKind"); 85 } 86 87 SparcMCExpr::VariantKind SparcMCExpr::parseVariantKind(StringRef name) 88 { 89 return StringSwitch<SparcMCExpr::VariantKind>(name) 90 .Case("lo", VK_Sparc_LO) 91 .Case("hi", VK_Sparc_HI) 92 .Case("h44", VK_Sparc_H44) 93 .Case("m44", VK_Sparc_M44) 94 .Case("l44", VK_Sparc_L44) 95 .Case("hh", VK_Sparc_HH) 96 .Case("hm", VK_Sparc_HM) 97 .Case("lm", VK_Sparc_LM) 98 .Case("pc22", VK_Sparc_PC22) 99 .Case("pc10", VK_Sparc_PC10) 100 .Case("got22", VK_Sparc_GOT22) 101 .Case("got10", VK_Sparc_GOT10) 102 .Case("got13", VK_Sparc_GOT13) 103 .Case("r_disp32", VK_Sparc_R_DISP32) 104 .Case("tgd_hi22", VK_Sparc_TLS_GD_HI22) 105 .Case("tgd_lo10", VK_Sparc_TLS_GD_LO10) 106 .Case("tgd_add", VK_Sparc_TLS_GD_ADD) 107 .Case("tgd_call", VK_Sparc_TLS_GD_CALL) 108 .Case("tldm_hi22", VK_Sparc_TLS_LDM_HI22) 109 .Case("tldm_lo10", VK_Sparc_TLS_LDM_LO10) 110 .Case("tldm_add", VK_Sparc_TLS_LDM_ADD) 111 .Case("tldm_call", VK_Sparc_TLS_LDM_CALL) 112 .Case("tldo_hix22", VK_Sparc_TLS_LDO_HIX22) 113 .Case("tldo_lox10", VK_Sparc_TLS_LDO_LOX10) 114 .Case("tldo_add", VK_Sparc_TLS_LDO_ADD) 115 .Case("tie_hi22", VK_Sparc_TLS_IE_HI22) 116 .Case("tie_lo10", VK_Sparc_TLS_IE_LO10) 117 .Case("tie_ld", VK_Sparc_TLS_IE_LD) 118 .Case("tie_ldx", VK_Sparc_TLS_IE_LDX) 119 .Case("tie_add", VK_Sparc_TLS_IE_ADD) 120 .Case("tle_hix22", VK_Sparc_TLS_LE_HIX22) 121 .Case("tle_lox10", VK_Sparc_TLS_LE_LOX10) 122 .Default(VK_Sparc_None); 123 } 124 125 Sparc::Fixups SparcMCExpr::getFixupKind(SparcMCExpr::VariantKind Kind) { 126 switch (Kind) { 127 default: llvm_unreachable("Unhandled SparcMCExpr::VariantKind"); 128 case VK_Sparc_LO: return Sparc::fixup_sparc_lo10; 129 case VK_Sparc_HI: return Sparc::fixup_sparc_hi22; 130 case VK_Sparc_H44: return Sparc::fixup_sparc_h44; 131 case VK_Sparc_M44: return Sparc::fixup_sparc_m44; 132 case VK_Sparc_L44: return Sparc::fixup_sparc_l44; 133 case VK_Sparc_HH: return Sparc::fixup_sparc_hh; 134 case VK_Sparc_HM: return Sparc::fixup_sparc_hm; 135 case VK_Sparc_LM: return Sparc::fixup_sparc_lm; 136 case VK_Sparc_PC22: return Sparc::fixup_sparc_pc22; 137 case VK_Sparc_PC10: return Sparc::fixup_sparc_pc10; 138 case VK_Sparc_GOT22: return Sparc::fixup_sparc_got22; 139 case VK_Sparc_GOT10: return Sparc::fixup_sparc_got10; 140 case VK_Sparc_GOT13: return Sparc::fixup_sparc_got13; 141 case VK_Sparc_13: return Sparc::fixup_sparc_13; 142 case VK_Sparc_WPLT30: return Sparc::fixup_sparc_wplt30; 143 case VK_Sparc_WDISP30: return Sparc::fixup_sparc_call30; 144 case VK_Sparc_TLS_GD_HI22: return Sparc::fixup_sparc_tls_gd_hi22; 145 case VK_Sparc_TLS_GD_LO10: return Sparc::fixup_sparc_tls_gd_lo10; 146 case VK_Sparc_TLS_GD_ADD: return Sparc::fixup_sparc_tls_gd_add; 147 case VK_Sparc_TLS_GD_CALL: return Sparc::fixup_sparc_tls_gd_call; 148 case VK_Sparc_TLS_LDM_HI22: return Sparc::fixup_sparc_tls_ldm_hi22; 149 case VK_Sparc_TLS_LDM_LO10: return Sparc::fixup_sparc_tls_ldm_lo10; 150 case VK_Sparc_TLS_LDM_ADD: return Sparc::fixup_sparc_tls_ldm_add; 151 case VK_Sparc_TLS_LDM_CALL: return Sparc::fixup_sparc_tls_ldm_call; 152 case VK_Sparc_TLS_LDO_HIX22: return Sparc::fixup_sparc_tls_ldo_hix22; 153 case VK_Sparc_TLS_LDO_LOX10: return Sparc::fixup_sparc_tls_ldo_lox10; 154 case VK_Sparc_TLS_LDO_ADD: return Sparc::fixup_sparc_tls_ldo_add; 155 case VK_Sparc_TLS_IE_HI22: return Sparc::fixup_sparc_tls_ie_hi22; 156 case VK_Sparc_TLS_IE_LO10: return Sparc::fixup_sparc_tls_ie_lo10; 157 case VK_Sparc_TLS_IE_LD: return Sparc::fixup_sparc_tls_ie_ld; 158 case VK_Sparc_TLS_IE_LDX: return Sparc::fixup_sparc_tls_ie_ldx; 159 case VK_Sparc_TLS_IE_ADD: return Sparc::fixup_sparc_tls_ie_add; 160 case VK_Sparc_TLS_LE_HIX22: return Sparc::fixup_sparc_tls_le_hix22; 161 case VK_Sparc_TLS_LE_LOX10: return Sparc::fixup_sparc_tls_le_lox10; 162 } 163 } 164 165 bool 166 SparcMCExpr::evaluateAsRelocatableImpl(MCValue &Res, 167 const MCAsmLayout *Layout, 168 const MCFixup *Fixup) const { 169 return getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup); 170 } 171 172 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) { 173 switch (Expr->getKind()) { 174 case MCExpr::Target: 175 llvm_unreachable("Can't handle nested target expr!"); 176 break; 177 178 case MCExpr::Constant: 179 break; 180 181 case MCExpr::Binary: { 182 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr); 183 fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm); 184 fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm); 185 break; 186 } 187 188 case MCExpr::SymbolRef: { 189 const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr); 190 cast<MCSymbolELF>(SymRef.getSymbol()).setType(ELF::STT_TLS); 191 break; 192 } 193 194 case MCExpr::Unary: 195 fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm); 196 break; 197 } 198 199 } 200 201 void SparcMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const { 202 switch(getKind()) { 203 default: return; 204 case VK_Sparc_TLS_GD_CALL: 205 case VK_Sparc_TLS_LDM_CALL: { 206 // The corresponding relocations reference __tls_get_addr, as they call it, 207 // but this is only implicit; we must explicitly add it to our symbol table 208 // to bind it for these uses. 209 MCSymbol *Symbol = Asm.getContext().getOrCreateSymbol("__tls_get_addr"); 210 Asm.registerSymbol(*Symbol); 211 auto ELFSymbol = cast<MCSymbolELF>(Symbol); 212 if (!ELFSymbol->isBindingSet()) 213 ELFSymbol->setBinding(ELF::STB_GLOBAL); 214 LLVM_FALLTHROUGH; 215 } 216 case VK_Sparc_TLS_GD_HI22: 217 case VK_Sparc_TLS_GD_LO10: 218 case VK_Sparc_TLS_GD_ADD: 219 case VK_Sparc_TLS_LDM_HI22: 220 case VK_Sparc_TLS_LDM_LO10: 221 case VK_Sparc_TLS_LDM_ADD: 222 case VK_Sparc_TLS_LDO_HIX22: 223 case VK_Sparc_TLS_LDO_LOX10: 224 case VK_Sparc_TLS_LDO_ADD: 225 case VK_Sparc_TLS_IE_HI22: 226 case VK_Sparc_TLS_IE_LO10: 227 case VK_Sparc_TLS_IE_LD: 228 case VK_Sparc_TLS_IE_LDX: 229 case VK_Sparc_TLS_IE_ADD: 230 case VK_Sparc_TLS_LE_HIX22: 231 case VK_Sparc_TLS_LE_LOX10: break; 232 } 233 fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm); 234 } 235 236 void SparcMCExpr::visitUsedExpr(MCStreamer &Streamer) const { 237 Streamer.visitUsedExpr(*getSubExpr()); 238 } 239