Michael J. Spencer | 7d49004 | 2010-10-09 11:01:07 +0000 | [diff] [blame] | 1 | //===- COFFAsmParser.cpp - COFF Assembly Parser ---------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "llvm/MC/MCParser/MCAsmParserExtension.h" |
| 11 | #include "llvm/ADT/Twine.h" |
| 12 | #include "llvm/MC/MCAsmInfo.h" |
| 13 | #include "llvm/MC/MCContext.h" |
| 14 | #include "llvm/MC/MCParser/MCAsmLexer.h" |
| 15 | #include "llvm/MC/MCSectionCOFF.h" |
| 16 | #include "llvm/MC/MCStreamer.h" |
Charles Davis | fbc539f | 2011-05-22 21:12:15 +0000 | [diff] [blame^] | 17 | #include "llvm/MC/MCExpr.h" |
Michael J. Spencer | 7d49004 | 2010-10-09 11:01:07 +0000 | [diff] [blame] | 18 | #include "llvm/Support/COFF.h" |
| 19 | using namespace llvm; |
| 20 | |
| 21 | namespace { |
| 22 | |
| 23 | class COFFAsmParser : public MCAsmParserExtension { |
| 24 | template<bool (COFFAsmParser::*Handler)(StringRef, SMLoc)> |
| 25 | void AddDirectiveHandler(StringRef Directive) { |
| 26 | getParser().AddDirectiveHandler(this, Directive, |
| 27 | HandleDirective<COFFAsmParser, Handler>); |
| 28 | } |
| 29 | |
| 30 | bool ParseSectionSwitch(StringRef Section, |
| 31 | unsigned Characteristics, |
| 32 | SectionKind Kind); |
| 33 | |
| 34 | virtual void Initialize(MCAsmParser &Parser) { |
| 35 | // Call the base implementation. |
| 36 | MCAsmParserExtension::Initialize(Parser); |
| 37 | |
| 38 | AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveText>(".text"); |
| 39 | AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveData>(".data"); |
| 40 | AddDirectiveHandler<&COFFAsmParser::ParseSectionDirectiveBSS>(".bss"); |
| 41 | AddDirectiveHandler<&COFFAsmParser::ParseDirectiveDef>(".def"); |
| 42 | AddDirectiveHandler<&COFFAsmParser::ParseDirectiveScl>(".scl"); |
| 43 | AddDirectiveHandler<&COFFAsmParser::ParseDirectiveType>(".type"); |
| 44 | AddDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef"); |
Charles Davis | fbc539f | 2011-05-22 21:12:15 +0000 | [diff] [blame^] | 45 | |
| 46 | // Win64 EH directives. |
| 47 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartProc>( |
| 48 | ".seh_proc"); |
| 49 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProc>( |
| 50 | ".seh_endproc"); |
| 51 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveStartChained>( |
| 52 | ".seh_startchained"); |
| 53 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndChained>( |
| 54 | ".seh_endchained"); |
| 55 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandler>( |
| 56 | ".seh_handler"); |
| 57 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveHandlerData>( |
| 58 | ".seh_handlerdata"); |
| 59 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushReg>( |
| 60 | ".seh_pushreg"); |
| 61 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSetFrame>( |
| 62 | ".seh_setframe"); |
| 63 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveAllocStack>( |
| 64 | ".seh_stackalloc"); |
| 65 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveReg>( |
| 66 | ".seh_savereg"); |
| 67 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveSaveXMM>( |
| 68 | ".seh_savexmm"); |
| 69 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectivePushFrame>( |
| 70 | ".seh_pushframe"); |
| 71 | AddDirectiveHandler<&COFFAsmParser::ParseSEHDirectiveEndProlog>( |
| 72 | ".seh_endprologue"); |
Michael J. Spencer | 7d49004 | 2010-10-09 11:01:07 +0000 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | bool ParseSectionDirectiveText(StringRef, SMLoc) { |
| 76 | return ParseSectionSwitch(".text", |
| 77 | COFF::IMAGE_SCN_CNT_CODE |
| 78 | | COFF::IMAGE_SCN_MEM_EXECUTE |
| 79 | | COFF::IMAGE_SCN_MEM_READ, |
| 80 | SectionKind::getText()); |
| 81 | } |
| 82 | bool ParseSectionDirectiveData(StringRef, SMLoc) { |
| 83 | return ParseSectionSwitch(".data", |
| 84 | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
| 85 | | COFF::IMAGE_SCN_MEM_READ |
| 86 | | COFF::IMAGE_SCN_MEM_WRITE, |
| 87 | SectionKind::getDataRel()); |
| 88 | } |
| 89 | bool ParseSectionDirectiveBSS(StringRef, SMLoc) { |
| 90 | return ParseSectionSwitch(".bss", |
| 91 | COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
| 92 | | COFF::IMAGE_SCN_MEM_READ |
| 93 | | COFF::IMAGE_SCN_MEM_WRITE, |
| 94 | SectionKind::getBSS()); |
| 95 | } |
| 96 | |
| 97 | bool ParseDirectiveDef(StringRef, SMLoc); |
| 98 | bool ParseDirectiveScl(StringRef, SMLoc); |
| 99 | bool ParseDirectiveType(StringRef, SMLoc); |
| 100 | bool ParseDirectiveEndef(StringRef, SMLoc); |
| 101 | |
Charles Davis | fbc539f | 2011-05-22 21:12:15 +0000 | [diff] [blame^] | 102 | // Win64 EH directives. |
| 103 | bool ParseSEHDirectiveStartProc(StringRef, SMLoc); |
| 104 | bool ParseSEHDirectiveEndProc(StringRef, SMLoc); |
| 105 | bool ParseSEHDirectiveStartChained(StringRef, SMLoc); |
| 106 | bool ParseSEHDirectiveEndChained(StringRef, SMLoc); |
| 107 | bool ParseSEHDirectiveHandler(StringRef, SMLoc); |
| 108 | bool ParseSEHDirectiveHandlerData(StringRef, SMLoc); |
| 109 | bool ParseSEHDirectivePushReg(StringRef, SMLoc L); |
| 110 | bool ParseSEHDirectiveSetFrame(StringRef, SMLoc L); |
| 111 | bool ParseSEHDirectiveAllocStack(StringRef, SMLoc L); |
| 112 | bool ParseSEHDirectiveSaveReg(StringRef, SMLoc L); |
| 113 | bool ParseSEHDirectiveSaveXMM(StringRef, SMLoc L); |
| 114 | bool ParseSEHDirectivePushFrame(StringRef, SMLoc L); |
| 115 | bool ParseSEHDirectiveEndProlog(StringRef, SMLoc); |
| 116 | |
| 117 | bool ParseAtUnwindOrAtExcept(bool &unwind, bool &except); |
Michael J. Spencer | 7d49004 | 2010-10-09 11:01:07 +0000 | [diff] [blame] | 118 | public: |
| 119 | COFFAsmParser() {} |
| 120 | }; |
| 121 | |
| 122 | } // end annonomous namespace. |
| 123 | |
| 124 | bool COFFAsmParser::ParseSectionSwitch(StringRef Section, |
| 125 | unsigned Characteristics, |
| 126 | SectionKind Kind) { |
| 127 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 128 | return TokError("unexpected token in section switching directive"); |
| 129 | Lex(); |
| 130 | |
| 131 | getStreamer().SwitchSection(getContext().getCOFFSection( |
| 132 | Section, Characteristics, Kind)); |
| 133 | |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | bool COFFAsmParser::ParseDirectiveDef(StringRef, SMLoc) { |
| 138 | StringRef SymbolName; |
| 139 | |
| 140 | if (getParser().ParseIdentifier(SymbolName)) |
| 141 | return TokError("expected identifier in directive"); |
| 142 | |
| 143 | MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName); |
| 144 | |
| 145 | getStreamer().BeginCOFFSymbolDef(Sym); |
| 146 | |
| 147 | Lex(); |
| 148 | return false; |
| 149 | } |
| 150 | |
| 151 | bool COFFAsmParser::ParseDirectiveScl(StringRef, SMLoc) { |
| 152 | int64_t SymbolStorageClass; |
| 153 | if (getParser().ParseAbsoluteExpression(SymbolStorageClass)) |
| 154 | return true; |
| 155 | |
| 156 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 157 | return TokError("unexpected token in directive"); |
| 158 | |
| 159 | Lex(); |
| 160 | getStreamer().EmitCOFFSymbolStorageClass(SymbolStorageClass); |
| 161 | return false; |
| 162 | } |
| 163 | |
| 164 | bool COFFAsmParser::ParseDirectiveType(StringRef, SMLoc) { |
| 165 | int64_t Type; |
| 166 | if (getParser().ParseAbsoluteExpression(Type)) |
| 167 | return true; |
| 168 | |
| 169 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 170 | return TokError("unexpected token in directive"); |
| 171 | |
| 172 | Lex(); |
| 173 | getStreamer().EmitCOFFSymbolType(Type); |
| 174 | return false; |
| 175 | } |
| 176 | |
| 177 | bool COFFAsmParser::ParseDirectiveEndef(StringRef, SMLoc) { |
| 178 | Lex(); |
| 179 | getStreamer().EndCOFFSymbolDef(); |
| 180 | return false; |
| 181 | } |
| 182 | |
Charles Davis | fbc539f | 2011-05-22 21:12:15 +0000 | [diff] [blame^] | 183 | bool COFFAsmParser::ParseSEHDirectiveStartProc(StringRef, SMLoc) { |
| 184 | const MCExpr *e; |
| 185 | const MCSymbolRefExpr *funcExpr; |
| 186 | SMLoc startLoc = getLexer().getLoc(); |
| 187 | if (getParser().ParseExpression(e)) |
| 188 | return true; |
| 189 | |
| 190 | if (!(funcExpr = dyn_cast<MCSymbolRefExpr>(e))) |
| 191 | return Error(startLoc, "expected symbol"); |
| 192 | |
| 193 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 194 | return TokError("unexpected token in directive"); |
| 195 | |
| 196 | Lex(); |
| 197 | getStreamer().EmitWin64EHStartProc(&funcExpr->getSymbol()); |
| 198 | return false; |
| 199 | } |
| 200 | |
| 201 | bool COFFAsmParser::ParseSEHDirectiveEndProc(StringRef, SMLoc) { |
| 202 | Lex(); |
| 203 | getStreamer().EmitWin64EHEndProc(); |
| 204 | return false; |
| 205 | } |
| 206 | |
| 207 | bool COFFAsmParser::ParseSEHDirectiveStartChained(StringRef, SMLoc) { |
| 208 | Lex(); |
| 209 | getStreamer().EmitWin64EHStartChained(); |
| 210 | return false; |
| 211 | } |
| 212 | |
| 213 | bool COFFAsmParser::ParseSEHDirectiveEndChained(StringRef, SMLoc) { |
| 214 | Lex(); |
| 215 | getStreamer().EmitWin64EHEndChained(); |
| 216 | return false; |
| 217 | } |
| 218 | |
| 219 | bool COFFAsmParser::ParseSEHDirectiveHandler(StringRef, SMLoc) { |
| 220 | const MCExpr *e; |
| 221 | const MCSymbolRefExpr *funcExpr; |
| 222 | SMLoc startLoc = getLexer().getLoc(); |
| 223 | if (getParser().ParseExpression(e)) |
| 224 | return true; |
| 225 | |
| 226 | if (!(funcExpr = dyn_cast<MCSymbolRefExpr>(e))) |
| 227 | return Error(startLoc, "expected symbol"); |
| 228 | |
| 229 | bool unwind = false, except = false; |
| 230 | if (!ParseAtUnwindOrAtExcept(unwind, except)) |
| 231 | return true; |
| 232 | if (getLexer().is(AsmToken::Comma)) { |
| 233 | Lex(); |
| 234 | if (!ParseAtUnwindOrAtExcept(unwind, except)) |
| 235 | return true; |
| 236 | } |
| 237 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 238 | return TokError("unexpected token in directive"); |
| 239 | |
| 240 | Lex(); |
| 241 | getStreamer().EmitWin64EHHandler(&funcExpr->getSymbol(), unwind, except); |
| 242 | return false; |
| 243 | } |
| 244 | |
| 245 | bool COFFAsmParser::ParseSEHDirectiveHandlerData(StringRef, SMLoc) { |
| 246 | Lex(); |
| 247 | getStreamer().EmitWin64EHHandlerData(); |
| 248 | return false; |
| 249 | } |
| 250 | |
| 251 | bool COFFAsmParser::ParseSEHDirectivePushReg(StringRef, SMLoc L) { |
| 252 | return Error(L, "not implemented yet"); |
| 253 | } |
| 254 | |
| 255 | bool COFFAsmParser::ParseSEHDirectiveSetFrame(StringRef, SMLoc L) { |
| 256 | return Error(L, "not implemented yet"); |
| 257 | } |
| 258 | |
| 259 | bool COFFAsmParser::ParseSEHDirectiveAllocStack(StringRef, SMLoc L) { |
| 260 | return Error(L, "not implemented yet"); |
| 261 | } |
| 262 | |
| 263 | bool COFFAsmParser::ParseSEHDirectiveSaveReg(StringRef, SMLoc L) { |
| 264 | return Error(L, "not implemented yet"); |
| 265 | } |
| 266 | |
| 267 | bool COFFAsmParser::ParseSEHDirectiveSaveXMM(StringRef, SMLoc L) { |
| 268 | return Error(L, "not implemented yet"); |
| 269 | } |
| 270 | |
| 271 | bool COFFAsmParser::ParseSEHDirectivePushFrame(StringRef, SMLoc L) { |
| 272 | return Error(L, "not implemented yet"); |
| 273 | } |
| 274 | |
| 275 | bool COFFAsmParser::ParseSEHDirectiveEndProlog(StringRef, SMLoc) { |
| 276 | Lex(); |
| 277 | getStreamer().EmitWin64EHEndProlog(); |
| 278 | return false; |
| 279 | } |
| 280 | |
| 281 | bool COFFAsmParser::ParseAtUnwindOrAtExcept(bool &unwind, bool &except) { |
| 282 | StringRef identifier; |
| 283 | SMLoc startLoc = getLexer().getLoc(); |
| 284 | if (!getParser().ParseIdentifier(identifier)) |
| 285 | return Error(startLoc, "expected @unwind or @except"); |
| 286 | if (identifier == "@unwind") |
| 287 | unwind = true; |
| 288 | else if (identifier == "@except") |
| 289 | except = true; |
| 290 | else |
| 291 | return Error(startLoc, "expected @unwind or @except"); |
| 292 | return false; |
| 293 | } |
| 294 | |
Michael J. Spencer | 7d49004 | 2010-10-09 11:01:07 +0000 | [diff] [blame] | 295 | namespace llvm { |
| 296 | |
| 297 | MCAsmParserExtension *createCOFFAsmParser() { |
| 298 | return new COFFAsmParser; |
| 299 | } |
| 300 | |
| 301 | } |