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 #include "llvm/Support/Casting.h" 21 22 using namespace llvm; 23 24 #define DEBUG_TYPE "sparcmcexpr" 25 26 const SparcMCExpr* 27 SparcMCExpr::create(VariantKind Kind, const MCExpr *Expr, 28 MCContext &Ctx) { 29 return new (Ctx) SparcMCExpr(Kind, Expr); 30 } 31 32 void SparcMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const { 33 34 bool closeParen = printVariantKind(OS, Kind); 35 36 const MCExpr *Expr = getSubExpr(); 37 Expr->print(OS, MAI); 38 39 if (closeParen) 40 OS << ')'; 41 } 42 43 bool SparcMCExpr::printVariantKind(raw_ostream &OS, VariantKind Kind) 44 { 45 switch (Kind) { 46 case VK_Sparc_None: return false; 47 case VK_Sparc_LO: OS << "%lo("; return true; 48 case VK_Sparc_HI: OS << "%hi("; return true; 49 case VK_Sparc_H44: OS << "%h44("; return true; 50 case VK_Sparc_M44: OS << "%m44("; return true; 51 case VK_Sparc_L44: OS << "%l44("; return true; 52 case VK_Sparc_HH: OS << "%hh("; return true; 53 case VK_Sparc_HM: OS << "%hm("; return true; 54 case VK_Sparc_LM: OS << "%lm("; return true; 55 // FIXME: use %pc22/%pc10, if system assembler supports them. 56 case VK_Sparc_PC22: OS << "%hi("; return true; 57 case VK_Sparc_PC10: OS << "%lo("; return true; 58 // FIXME: use %got22/%got10, if system assembler supports them. 59 case VK_Sparc_GOT22: OS << "%hi("; return true; 60 case VK_Sparc_GOT10: OS << "%lo("; return true; 61 case VK_Sparc_GOT13: return false; 62 case VK_Sparc_13: return false; 63 case VK_Sparc_WDISP30: return false; 64 case VK_Sparc_WPLT30: return false; 65 case VK_Sparc_R_DISP32: OS << "%r_disp32("; return true; 66 case VK_Sparc_TLS_GD_HI22: OS << "%tgd_hi22("; return true; 67 case VK_Sparc_TLS_GD_LO10: OS << "%tgd_lo10("; return true; 68 case VK_Sparc_TLS_GD_ADD: OS << "%tgd_add("; return true; 69 case VK_Sparc_TLS_GD_CALL: OS << "%tgd_call("; return true; 70 case VK_Sparc_TLS_LDM_HI22: OS << "%tldm_hi22("; return true; 71 case VK_Sparc_TLS_LDM_LO10: OS << "%tldm_lo10("; return true; 72 case VK_Sparc_TLS_LDM_ADD: OS << "%tldm_add("; return true; 73 case VK_Sparc_TLS_LDM_CALL: OS << "%tldm_call("; return true; 74 case VK_Sparc_TLS_LDO_HIX22: OS << "%tldo_hix22("; return true; 75 case VK_Sparc_TLS_LDO_LOX10: OS << "%tldo_lox10("; return true; 76 case VK_Sparc_TLS_LDO_ADD: OS << "%tldo_add("; return true; 77 case VK_Sparc_TLS_IE_HI22: OS << "%tie_hi22("; return true; 78 case VK_Sparc_TLS_IE_LO10: OS << "%tie_lo10("; return true; 79 case VK_Sparc_TLS_IE_LD: OS << "%tie_ld("; return true; 80 case VK_Sparc_TLS_IE_LDX: OS << "%tie_ldx("; return true; 81 case VK_Sparc_TLS_IE_ADD: OS << "%tie_add("; return true; 82 case VK_Sparc_TLS_LE_HIX22: OS << "%tle_hix22("; return true; 83 case VK_Sparc_TLS_LE_LOX10: OS << "%tle_lox10("; return true; 84 case VK_Sparc_HIX22: OS << "%hix("; return true; 85 case VK_Sparc_LOX10: OS << "%lox("; return true; 86 case VK_Sparc_GOTDATA_HIX22: OS << "%gdop_hix22("; return true; 87 case VK_Sparc_GOTDATA_LOX10: OS << "%gdop_lox10("; return true; 88 case VK_Sparc_GOTDATA_OP: OS << "%gdop("; return true; 89 } 90 llvm_unreachable("Unhandled SparcMCExpr::VariantKind"); 91 } 92 93 SparcMCExpr::VariantKind SparcMCExpr::parseVariantKind(StringRef name) 94 { 95 return StringSwitch<SparcMCExpr::VariantKind>(name) 96 .Case("lo", VK_Sparc_LO) 97 .Case("hi", VK_Sparc_HI) 98 .Case("h44", VK_Sparc_H44) 99 .Case("m44", VK_Sparc_M44) 100 .Case("l44", VK_Sparc_L44) 101 .Case("hh", VK_Sparc_HH) 102 .Case("hm", VK_Sparc_HM) 103 .Case("lm", VK_Sparc_LM) 104 .Case("pc22", VK_Sparc_PC22) 105 .Case("pc10", VK_Sparc_PC10) 106 .Case("got22", VK_Sparc_GOT22) 107 .Case("got10", VK_Sparc_GOT10) 108 .Case("got13", VK_Sparc_GOT13) 109 .Case("r_disp32", VK_Sparc_R_DISP32) 110 .Case("tgd_hi22", VK_Sparc_TLS_GD_HI22) 111 .Case("tgd_lo10", VK_Sparc_TLS_GD_LO10) 112 .Case("tgd_add", VK_Sparc_TLS_GD_ADD) 113 .Case("tgd_call", VK_Sparc_TLS_GD_CALL) 114 .Case("tldm_hi22", VK_Sparc_TLS_LDM_HI22) 115 .Case("tldm_lo10", VK_Sparc_TLS_LDM_LO10) 116 .Case("tldm_add", VK_Sparc_TLS_LDM_ADD) 117 .Case("tldm_call", VK_Sparc_TLS_LDM_CALL) 118 .Case("tldo_hix22", VK_Sparc_TLS_LDO_HIX22) 119 .Case("tldo_lox10", VK_Sparc_TLS_LDO_LOX10) 120 .Case("tldo_add", VK_Sparc_TLS_LDO_ADD) 121 .Case("tie_hi22", VK_Sparc_TLS_IE_HI22) 122 .Case("tie_lo10", VK_Sparc_TLS_IE_LO10) 123 .Case("tie_ld", VK_Sparc_TLS_IE_LD) 124 .Case("tie_ldx", VK_Sparc_TLS_IE_LDX) 125 .Case("tie_add", VK_Sparc_TLS_IE_ADD) 126 .Case("tle_hix22", VK_Sparc_TLS_LE_HIX22) 127 .Case("tle_lox10", VK_Sparc_TLS_LE_LOX10) 128 .Case("hix", VK_Sparc_HIX22) 129 .Case("lox", VK_Sparc_LOX10) 130 .Case("gdop_hix22", VK_Sparc_GOTDATA_HIX22) 131 .Case("gdop_lox10", VK_Sparc_GOTDATA_LOX10) 132 .Case("gdop", VK_Sparc_GOTDATA_OP) 133 .Default(VK_Sparc_None); 134 } 135 136 Sparc::Fixups SparcMCExpr::getFixupKind(SparcMCExpr::VariantKind Kind) { 137 switch (Kind) { 138 default: llvm_unreachable("Unhandled SparcMCExpr::VariantKind"); 139 case VK_Sparc_LO: return Sparc::fixup_sparc_lo10; 140 case VK_Sparc_HI: return Sparc::fixup_sparc_hi22; 141 case VK_Sparc_H44: return Sparc::fixup_sparc_h44; 142 case VK_Sparc_M44: return Sparc::fixup_sparc_m44; 143 case VK_Sparc_L44: return Sparc::fixup_sparc_l44; 144 case VK_Sparc_HH: return Sparc::fixup_sparc_hh; 145 case VK_Sparc_HM: return Sparc::fixup_sparc_hm; 146 case VK_Sparc_LM: return Sparc::fixup_sparc_lm; 147 case VK_Sparc_PC22: return Sparc::fixup_sparc_pc22; 148 case VK_Sparc_PC10: return Sparc::fixup_sparc_pc10; 149 case VK_Sparc_GOT22: return Sparc::fixup_sparc_got22; 150 case VK_Sparc_GOT10: return Sparc::fixup_sparc_got10; 151 case VK_Sparc_GOT13: return Sparc::fixup_sparc_got13; 152 case VK_Sparc_13: return Sparc::fixup_sparc_13; 153 case VK_Sparc_WPLT30: return Sparc::fixup_sparc_wplt30; 154 case VK_Sparc_WDISP30: return Sparc::fixup_sparc_call30; 155 case VK_Sparc_TLS_GD_HI22: return Sparc::fixup_sparc_tls_gd_hi22; 156 case VK_Sparc_TLS_GD_LO10: return Sparc::fixup_sparc_tls_gd_lo10; 157 case VK_Sparc_TLS_GD_ADD: return Sparc::fixup_sparc_tls_gd_add; 158 case VK_Sparc_TLS_GD_CALL: return Sparc::fixup_sparc_tls_gd_call; 159 case VK_Sparc_TLS_LDM_HI22: return Sparc::fixup_sparc_tls_ldm_hi22; 160 case VK_Sparc_TLS_LDM_LO10: return Sparc::fixup_sparc_tls_ldm_lo10; 161 case VK_Sparc_TLS_LDM_ADD: return Sparc::fixup_sparc_tls_ldm_add; 162 case VK_Sparc_TLS_LDM_CALL: return Sparc::fixup_sparc_tls_ldm_call; 163 case VK_Sparc_TLS_LDO_HIX22: return Sparc::fixup_sparc_tls_ldo_hix22; 164 case VK_Sparc_TLS_LDO_LOX10: return Sparc::fixup_sparc_tls_ldo_lox10; 165 case VK_Sparc_TLS_LDO_ADD: return Sparc::fixup_sparc_tls_ldo_add; 166 case VK_Sparc_TLS_IE_HI22: return Sparc::fixup_sparc_tls_ie_hi22; 167 case VK_Sparc_TLS_IE_LO10: return Sparc::fixup_sparc_tls_ie_lo10; 168 case VK_Sparc_TLS_IE_LD: return Sparc::fixup_sparc_tls_ie_ld; 169 case VK_Sparc_TLS_IE_LDX: return Sparc::fixup_sparc_tls_ie_ldx; 170 case VK_Sparc_TLS_IE_ADD: return Sparc::fixup_sparc_tls_ie_add; 171 case VK_Sparc_TLS_LE_HIX22: return Sparc::fixup_sparc_tls_le_hix22; 172 case VK_Sparc_TLS_LE_LOX10: return Sparc::fixup_sparc_tls_le_lox10; 173 case VK_Sparc_HIX22: return Sparc::fixup_sparc_hix22; 174 case VK_Sparc_LOX10: return Sparc::fixup_sparc_lox10; 175 case VK_Sparc_GOTDATA_HIX22: return Sparc::fixup_sparc_gotdata_hix22; 176 case VK_Sparc_GOTDATA_LOX10: return Sparc::fixup_sparc_gotdata_lox10; 177 case VK_Sparc_GOTDATA_OP: return Sparc::fixup_sparc_gotdata_op; 178 } 179 } 180 181 bool 182 SparcMCExpr::evaluateAsRelocatableImpl(MCValue &Res, 183 const MCAsmLayout *Layout, 184 const MCFixup *Fixup) const { 185 return getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup); 186 } 187 188 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) { 189 switch (Expr->getKind()) { 190 case MCExpr::Target: 191 llvm_unreachable("Can't handle nested target expr!"); 192 break; 193 194 case MCExpr::Constant: 195 break; 196 197 case MCExpr::Binary: { 198 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr); 199 fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm); 200 fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm); 201 break; 202 } 203 204 case MCExpr::SymbolRef: { 205 const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr); 206 cast<MCSymbolELF>(SymRef.getSymbol()).setType(ELF::STT_TLS); 207 break; 208 } 209 210 case MCExpr::Unary: 211 fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm); 212 break; 213 } 214 215 } 216 217 void SparcMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const { 218 switch(getKind()) { 219 default: return; 220 case VK_Sparc_TLS_GD_CALL: 221 case VK_Sparc_TLS_LDM_CALL: { 222 // The corresponding relocations reference __tls_get_addr, as they call it, 223 // but this is only implicit; we must explicitly add it to our symbol table 224 // to bind it for these uses. 225 MCSymbol *Symbol = Asm.getContext().getOrCreateSymbol("__tls_get_addr"); 226 Asm.registerSymbol(*Symbol); 227 auto ELFSymbol = cast<MCSymbolELF>(Symbol); 228 if (!ELFSymbol->isBindingSet()) 229 ELFSymbol->setBinding(ELF::STB_GLOBAL); 230 [[fallthrough]]; 231 } 232 case VK_Sparc_TLS_GD_HI22: 233 case VK_Sparc_TLS_GD_LO10: 234 case VK_Sparc_TLS_GD_ADD: 235 case VK_Sparc_TLS_LDM_HI22: 236 case VK_Sparc_TLS_LDM_LO10: 237 case VK_Sparc_TLS_LDM_ADD: 238 case VK_Sparc_TLS_LDO_HIX22: 239 case VK_Sparc_TLS_LDO_LOX10: 240 case VK_Sparc_TLS_LDO_ADD: 241 case VK_Sparc_TLS_IE_HI22: 242 case VK_Sparc_TLS_IE_LO10: 243 case VK_Sparc_TLS_IE_LD: 244 case VK_Sparc_TLS_IE_LDX: 245 case VK_Sparc_TLS_IE_ADD: 246 case VK_Sparc_TLS_LE_HIX22: 247 case VK_Sparc_TLS_LE_LOX10: break; 248 } 249 fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm); 250 } 251 252 void SparcMCExpr::visitUsedExpr(MCStreamer &Streamer) const { 253 Streamer.visitUsedExpr(*getSubExpr()); 254 } 255