1 //===- SPARCV9.cpp --------------------------------------------------------===// 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 #include "InputFiles.h" 10 #include "Symbols.h" 11 #include "SyntheticSections.h" 12 #include "Target.h" 13 #include "lld/Common/ErrorHandler.h" 14 #include "llvm/Support/Endian.h" 15 16 using namespace llvm; 17 using namespace llvm::support::endian; 18 using namespace llvm::ELF; 19 using namespace lld; 20 using namespace lld::elf; 21 22 namespace { 23 class SPARCV9 final : public TargetInfo { 24 public: 25 SPARCV9(); 26 RelExpr getRelExpr(RelType type, const Symbol &s, 27 const uint8_t *loc) const override; 28 void writePlt(uint8_t *buf, const Symbol &sym, 29 uint64_t pltEntryAddr) const override; 30 void relocate(uint8_t *loc, const Relocation &rel, 31 uint64_t val) const override; 32 }; 33 } // namespace 34 35 SPARCV9::SPARCV9() { 36 copyRel = R_SPARC_COPY; 37 gotRel = R_SPARC_GLOB_DAT; 38 pltRel = R_SPARC_JMP_SLOT; 39 relativeRel = R_SPARC_RELATIVE; 40 symbolicRel = R_SPARC_64; 41 pltEntrySize = 32; 42 pltHeaderSize = 4 * pltEntrySize; 43 44 defaultCommonPageSize = 8192; 45 defaultMaxPageSize = 0x100000; 46 defaultImageBase = 0x100000; 47 } 48 49 RelExpr SPARCV9::getRelExpr(RelType type, const Symbol &s, 50 const uint8_t *loc) const { 51 switch (type) { 52 case R_SPARC_32: 53 case R_SPARC_UA32: 54 case R_SPARC_64: 55 case R_SPARC_UA64: 56 case R_SPARC_H44: 57 case R_SPARC_M44: 58 case R_SPARC_L44: 59 case R_SPARC_HH22: 60 case R_SPARC_HM10: 61 case R_SPARC_LM22: 62 case R_SPARC_HI22: 63 case R_SPARC_LO10: 64 return R_ABS; 65 case R_SPARC_PC10: 66 case R_SPARC_PC22: 67 case R_SPARC_DISP32: 68 case R_SPARC_WDISP30: 69 return R_PC; 70 case R_SPARC_GOT10: 71 return R_GOT_OFF; 72 case R_SPARC_GOT22: 73 return R_GOT_OFF; 74 case R_SPARC_WPLT30: 75 return R_PLT_PC; 76 case R_SPARC_NONE: 77 return R_NONE; 78 case R_SPARC_TLS_LE_HIX22: 79 case R_SPARC_TLS_LE_LOX10: 80 return R_TPREL; 81 default: 82 error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) + 83 ") against symbol " + toString(s)); 84 return R_NONE; 85 } 86 } 87 88 void SPARCV9::relocate(uint8_t *loc, const Relocation &rel, 89 uint64_t val) const { 90 switch (rel.type) { 91 case R_SPARC_32: 92 case R_SPARC_UA32: 93 // V-word32 94 checkUInt(loc, val, 32, rel); 95 write32be(loc, val); 96 break; 97 case R_SPARC_DISP32: 98 // V-disp32 99 checkInt(loc, val, 32, rel); 100 write32be(loc, val); 101 break; 102 case R_SPARC_WDISP30: 103 case R_SPARC_WPLT30: 104 // V-disp30 105 checkInt(loc, val, 32, rel); 106 write32be(loc, (read32be(loc) & ~0x3fffffff) | ((val >> 2) & 0x3fffffff)); 107 break; 108 case R_SPARC_22: 109 // V-imm22 110 checkUInt(loc, val, 22, rel); 111 write32be(loc, (read32be(loc) & ~0x003fffff) | (val & 0x003fffff)); 112 break; 113 case R_SPARC_GOT22: 114 case R_SPARC_PC22: 115 case R_SPARC_LM22: 116 // T-imm22 117 write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 10) & 0x003fffff)); 118 break; 119 case R_SPARC_HI22: 120 // V-imm22 121 checkUInt(loc, val >> 10, 22, rel); 122 write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 10) & 0x003fffff)); 123 break; 124 case R_SPARC_WDISP19: 125 // V-disp19 126 checkInt(loc, val, 21, rel); 127 write32be(loc, (read32be(loc) & ~0x0007ffff) | ((val >> 2) & 0x0007ffff)); 128 break; 129 case R_SPARC_GOT10: 130 case R_SPARC_PC10: 131 // T-simm10 132 write32be(loc, (read32be(loc) & ~0x000003ff) | (val & 0x000003ff)); 133 break; 134 case R_SPARC_LO10: 135 // T-simm13 136 write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x000003ff)); 137 break; 138 case R_SPARC_64: 139 case R_SPARC_UA64: 140 // V-xword64 141 write64be(loc, val); 142 break; 143 case R_SPARC_HH22: 144 // V-imm22 145 checkUInt(loc, val >> 42, 22, rel); 146 write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 42) & 0x003fffff)); 147 break; 148 case R_SPARC_HM10: 149 // T-simm13 150 write32be(loc, (read32be(loc) & ~0x00001fff) | ((val >> 32) & 0x000003ff)); 151 break; 152 case R_SPARC_H44: 153 // V-imm22 154 checkUInt(loc, val >> 22, 22, rel); 155 write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 22) & 0x003fffff)); 156 break; 157 case R_SPARC_M44: 158 // T-imm10 159 write32be(loc, (read32be(loc) & ~0x000003ff) | ((val >> 12) & 0x000003ff)); 160 break; 161 case R_SPARC_L44: 162 // T-imm13 163 write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x00000fff)); 164 break; 165 case R_SPARC_TLS_LE_HIX22: 166 // T-imm22 167 write32be(loc, (read32be(loc) & ~0x003fffff) | ((~val >> 10) & 0x003fffff)); 168 break; 169 case R_SPARC_TLS_LE_LOX10: 170 // T-simm13 171 write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x000003ff) | 0x1C00); 172 break; 173 default: 174 llvm_unreachable("unknown relocation"); 175 } 176 } 177 178 void SPARCV9::writePlt(uint8_t *buf, const Symbol & /*sym*/, 179 uint64_t pltEntryAddr) const { 180 const uint8_t pltData[] = { 181 0x03, 0x00, 0x00, 0x00, // sethi (. - .PLT0), %g1 182 0x30, 0x68, 0x00, 0x00, // ba,a %xcc, .PLT1 183 0x01, 0x00, 0x00, 0x00, // nop 184 0x01, 0x00, 0x00, 0x00, // nop 185 0x01, 0x00, 0x00, 0x00, // nop 186 0x01, 0x00, 0x00, 0x00, // nop 187 0x01, 0x00, 0x00, 0x00, // nop 188 0x01, 0x00, 0x00, 0x00 // nop 189 }; 190 memcpy(buf, pltData, sizeof(pltData)); 191 192 uint64_t off = pltEntryAddr - in.plt->getVA(); 193 relocateNoSym(buf, R_SPARC_22, off); 194 relocateNoSym(buf + 4, R_SPARC_WDISP19, -(off + 4 - pltEntrySize)); 195 } 196 197 TargetInfo *elf::getSPARCV9TargetInfo() { 198 static SPARCV9 target; 199 return ⌖ 200 } 201