DwarfInstructions.hpp revision 1.5.2.2
1 1.5.2.2 rmind //===-------------------------- DwarfInstructions.hpp ---------------------===// 2 1.5.2.2 rmind // 3 1.5.2.2 rmind // The LLVM Compiler Infrastructure 4 1.5.2.2 rmind // 5 1.5.2.2 rmind // This file is dual licensed under the MIT and the University of Illinois Open 6 1.5.2.2 rmind // Source Licenses. See LICENSE.TXT for details. 7 1.5.2.2 rmind // 8 1.5.2.2 rmind // 9 1.5.2.2 rmind // Processor specific interpretation of DWARF unwind info. 10 1.5.2.2 rmind // 11 1.5.2.2 rmind //===----------------------------------------------------------------------===// 12 1.5.2.2 rmind 13 1.5.2.2 rmind #ifndef __DWARF_INSTRUCTIONS_HPP__ 14 1.5.2.2 rmind #define __DWARF_INSTRUCTIONS_HPP__ 15 1.5.2.2 rmind 16 1.5.2.2 rmind #include <cstdint> 17 1.5.2.2 rmind #include <cstdlib> 18 1.5.2.2 rmind 19 1.5.2.2 rmind #include "dwarf2.h" 20 1.5.2.2 rmind #include "AddressSpace.hpp" 21 1.5.2.2 rmind #include "Registers.hpp" 22 1.5.2.2 rmind #include "DwarfParser.hpp" 23 1.5.2.2 rmind 24 1.5.2.2 rmind namespace _Unwind { 25 1.5.2.2 rmind 26 1.5.2.2 rmind enum step_result { 27 1.5.2.2 rmind UNW_STEP_SUCCESS, 28 1.5.2.2 rmind UNW_STEP_END, 29 1.5.2.2 rmind UNW_STEP_FAILED 30 1.5.2.2 rmind }; 31 1.5.2.2 rmind 32 1.5.2.2 rmind /// DwarfInstructions maps abtract dwarf unwind instructions to a particular 33 1.5.2.2 rmind /// architecture 34 1.5.2.2 rmind template <typename A, typename R> class DwarfInstructions { 35 1.5.2.2 rmind public: 36 1.5.2.2 rmind typedef typename A::pint_t pint_t; 37 1.5.2.2 rmind typedef typename A::sint_t sint_t; 38 1.5.2.2 rmind 39 1.5.2.2 rmind static step_result stepWithDwarf(A &, pint_t, pint_t, R &, unw_proc_info_t *); 40 1.5.2.2 rmind 41 1.5.2.2 rmind private: 42 1.5.2.2 rmind static pint_t evaluateExpression(pint_t, A &, const R &, pint_t); 43 1.5.2.2 rmind static pint_t 44 1.5.2.2 rmind getSavedRegister(A &, const R &, pint_t, 45 1.5.2.2 rmind const typename CFI_Parser<A, R>::RegisterLocation &); 46 1.5.2.2 rmind static pint_t 47 1.5.2.2 rmind computeRegisterLocation(A &, const R &, pint_t, 48 1.5.2.2 rmind const typename CFI_Parser<A, R>::RegisterLocation &); 49 1.5.2.2 rmind 50 1.5.2.2 rmind static int lastRestoreReg(const R &) { return R::LAST_RESTORE_REG; } 51 1.5.2.2 rmind 52 1.5.2.2 rmind static pint_t getCFA(A &addressSpace, 53 1.5.2.2 rmind const typename CFI_Parser<A, R>::PrologInfo &prolog, 54 1.5.2.2 rmind const R ®isters) { 55 1.5.2.2 rmind if (prolog.cfaRegister != 0) 56 1.5.2.2 rmind return registers.getRegister(prolog.cfaRegister) + 57 1.5.2.2 rmind prolog.cfaRegisterOffset; 58 1.5.2.2 rmind if (prolog.cfaExpression != 0) 59 1.5.2.2 rmind return evaluateExpression(prolog.cfaExpression, addressSpace, registers, 60 1.5.2.2 rmind 0); 61 1.5.2.2 rmind assert(0 && "getCFA(): unknown location"); 62 1.5.2.2 rmind __builtin_unreachable(); 63 1.5.2.2 rmind } 64 1.5.2.2 rmind }; 65 1.5.2.2 rmind 66 1.5.2.2 rmind template <typename A, typename R> 67 1.5.2.2 rmind typename A::pint_t DwarfInstructions<A, R>::getSavedRegister( 68 1.5.2.2 rmind A &addressSpace, const R ®isters, pint_t cfa, 69 1.5.2.2 rmind const typename CFI_Parser<A, R>::RegisterLocation &savedReg) { 70 1.5.2.2 rmind switch (savedReg.location) { 71 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterInCFA: 72 1.5.2.2 rmind return addressSpace.getP(cfa + savedReg.value); 73 1.5.2.2 rmind 74 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterAtExpression: 75 1.5.2.2 rmind return addressSpace.getP( 76 1.5.2.2 rmind evaluateExpression(savedReg.value, addressSpace, registers, cfa)); 77 1.5.2.2 rmind 78 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterIsExpression: 79 1.5.2.2 rmind return evaluateExpression(savedReg.value, addressSpace, registers, cfa); 80 1.5.2.2 rmind 81 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterInRegister: 82 1.5.2.2 rmind return registers.getRegister(savedReg.value); 83 1.5.2.2 rmind 84 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterUnused: 85 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterOffsetFromCFA: 86 1.5.2.2 rmind assert(0 && "unsupported restore location for register"); 87 1.5.2.2 rmind } 88 1.5.2.2 rmind __builtin_unreachable(); 89 1.5.2.2 rmind } 90 1.5.2.2 rmind 91 1.5.2.2 rmind template <typename A, typename R> 92 1.5.2.2 rmind typename DwarfInstructions<A, R>::pint_t 93 1.5.2.2 rmind DwarfInstructions<A, R>::computeRegisterLocation( 94 1.5.2.2 rmind A &addressSpace, const R ®isters, pint_t cfa, 95 1.5.2.2 rmind const typename CFI_Parser<A, R>::RegisterLocation &savedReg) { 96 1.5.2.2 rmind switch (savedReg.location) { 97 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterInCFA: 98 1.5.2.2 rmind return cfa + savedReg.value; 99 1.5.2.2 rmind 100 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterAtExpression: 101 1.5.2.2 rmind return evaluateExpression(savedReg.value, addressSpace, registers, cfa); 102 1.5.2.2 rmind 103 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterIsExpression: 104 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterUnused: 105 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterOffsetFromCFA: 106 1.5.2.2 rmind case CFI_Parser<A, R>::kRegisterInRegister: 107 1.5.2.2 rmind assert(0 && "unsupported restore location for float/vector register"); 108 1.5.2.2 rmind } 109 1.5.2.2 rmind __builtin_unreachable(); 110 1.5.2.2 rmind } 111 1.5.2.2 rmind 112 1.5.2.2 rmind template <typename A, typename R> 113 1.5.2.2 rmind step_result DwarfInstructions<A, R>::stepWithDwarf(A &addressSpace, pint_t pc, 114 1.5.2.2 rmind pint_t fdeStart, 115 1.5.2.2 rmind R ®isters, 116 1.5.2.2 rmind unw_proc_info_t *ctx) { 117 1.5.2.2 rmind typename CFI_Parser<A, R>::FDE_Info fdeInfo; 118 1.5.2.2 rmind typename CFI_Parser<A, R>::CIE_Info cieInfo; 119 1.5.2.2 rmind if (!CFI_Parser<A, R>::decodeFDE(addressSpace, fdeStart, &fdeInfo, &cieInfo, 120 1.5.2.2 rmind ctx)) 121 1.5.2.2 rmind return UNW_STEP_FAILED; 122 1.5.2.2 rmind 123 1.5.2.2 rmind typename CFI_Parser<A, R>::PrologInfo prolog; 124 1.5.2.2 rmind if (!CFI_Parser<A, R>::parseFDEInstructions(addressSpace, fdeInfo, cieInfo, 125 1.5.2.2 rmind pc, &prolog, ctx)) 126 1.5.2.2 rmind return UNW_STEP_FAILED; 127 1.5.2.2 rmind 128 1.5.2.2 rmind // Create working copy of the register set. 129 1.5.2.2 rmind R newRegisters = registers; 130 1.5.2.2 rmind 131 1.5.2.2 rmind // Get pointer to CFA by the architecture-specific code. 132 1.5.2.2 rmind pint_t cfa = getCFA(addressSpace, prolog, registers); 133 1.5.2.2 rmind 134 1.5.2.2 rmind // Restore registers according to DWARF instructions 135 1.5.2.2 rmind pint_t returnAddress = 0; 136 1.5.2.2 rmind for (int i = 0; i <= lastRestoreReg(newRegisters); ++i) { 137 1.5.2.2 rmind if (prolog.savedRegisters[i].location == CFI_Parser<A, R>::kRegisterUnused) 138 1.5.2.2 rmind continue; 139 1.5.2.2 rmind if (i == (int)cieInfo.returnAddressRegister) 140 1.5.2.2 rmind returnAddress = getSavedRegister(addressSpace, registers, cfa, 141 1.5.2.2 rmind prolog.savedRegisters[i]); 142 1.5.2.2 rmind else if (registers.validRegister(i)) 143 1.5.2.2 rmind newRegisters.setRegister(i, getSavedRegister(addressSpace, registers, cfa, 144 1.5.2.2 rmind prolog.savedRegisters[i])); 145 1.5.2.2 rmind else if (registers.validFloatVectorRegister(i)) 146 1.5.2.2 rmind newRegisters.copyFloatVectorRegister( 147 1.5.2.2 rmind i, computeRegisterLocation(addressSpace, registers, cfa, 148 1.5.2.2 rmind prolog.savedRegisters[i])); 149 1.5.2.2 rmind else 150 1.5.2.2 rmind return UNW_STEP_FAILED; 151 1.5.2.2 rmind } 152 1.5.2.2 rmind 153 1.5.2.2 rmind // The CFA is defined as the stack pointer at the call site. 154 1.5.2.2 rmind // Therefore the SP is restored by setting it to the CFA. 155 1.5.2.2 rmind newRegisters.setSP(cfa); 156 1.5.2.2 rmind newRegisters.setIP(returnAddress + R::RETURN_OFFSET); 157 1.5.2.2 rmind 158 1.5.2.2 rmind // Now replace register set with the working copy. 159 1.5.2.2 rmind registers = newRegisters; 160 1.5.2.2 rmind 161 1.5.2.2 rmind return UNW_STEP_SUCCESS; 162 1.5.2.2 rmind } 163 1.5.2.2 rmind 164 1.5.2.2 rmind template <typename A, typename R> 165 1.5.2.2 rmind typename A::pint_t 166 1.5.2.2 rmind DwarfInstructions<A, R>::evaluateExpression(pint_t expression, A &addressSpace, 167 1.5.2.2 rmind const R ®isters, 168 1.5.2.2 rmind pint_t initialStackValue) { 169 1.5.2.2 rmind pint_t p = expression; 170 1.5.2.2 rmind pint_t expressionEnd = expression + 20; // Rough estimate 171 1.5.2.2 rmind uint64_t length = addressSpace.getULEB128(p, expressionEnd); 172 1.5.2.2 rmind expressionEnd = p + length; 173 1.5.2.2 rmind pint_t stack[100]; 174 1.5.2.2 rmind pint_t *sp = stack; 175 1.5.2.2 rmind *(++sp) = initialStackValue; 176 1.5.2.2 rmind 177 1.5.2.2 rmind while (p < expressionEnd) { 178 1.5.2.2 rmind uint8_t opcode = addressSpace.get8(p++); 179 1.5.2.2 rmind sint_t svalue; 180 1.5.2.2 rmind pint_t value; 181 1.5.2.2 rmind uint32_t reg; 182 1.5.2.2 rmind switch (opcode) { 183 1.5.2.2 rmind case DW_OP_addr: 184 1.5.2.2 rmind // push immediate address sized value 185 1.5.2.2 rmind value = addressSpace.getP(p); 186 1.5.2.2 rmind p += sizeof(pint_t); 187 1.5.2.2 rmind *(++sp) = value; 188 1.5.2.2 rmind break; 189 1.5.2.2 rmind 190 1.5.2.2 rmind case DW_OP_deref: 191 1.5.2.2 rmind // pop stack, dereference, push result 192 1.5.2.2 rmind value = *sp--; 193 1.5.2.2 rmind *(++sp) = addressSpace.getP(value); 194 1.5.2.2 rmind break; 195 1.5.2.2 rmind 196 1.5.2.2 rmind case DW_OP_const1u: 197 1.5.2.2 rmind // push immediate 1 byte value 198 1.5.2.2 rmind value = addressSpace.get8(p); 199 1.5.2.2 rmind p += 1; 200 1.5.2.2 rmind *(++sp) = value; 201 1.5.2.2 rmind break; 202 1.5.2.2 rmind 203 1.5.2.2 rmind case DW_OP_const1s: 204 1.5.2.2 rmind // push immediate 1 byte signed value 205 1.5.2.2 rmind svalue = (int8_t)addressSpace.get8(p); 206 1.5.2.2 rmind p += 1; 207 1.5.2.2 rmind *(++sp) = svalue; 208 1.5.2.2 rmind break; 209 1.5.2.2 rmind 210 1.5.2.2 rmind case DW_OP_const2u: 211 1.5.2.2 rmind // push immediate 2 byte value 212 1.5.2.2 rmind value = addressSpace.get16(p); 213 1.5.2.2 rmind p += 2; 214 1.5.2.2 rmind *(++sp) = value; 215 1.5.2.2 rmind break; 216 1.5.2.2 rmind 217 1.5.2.2 rmind case DW_OP_const2s: 218 1.5.2.2 rmind // push immediate 2 byte signed value 219 1.5.2.2 rmind svalue = (int16_t)addressSpace.get16(p); 220 1.5.2.2 rmind p += 2; 221 1.5.2.2 rmind *(++sp) = svalue; 222 1.5.2.2 rmind break; 223 1.5.2.2 rmind 224 1.5.2.2 rmind case DW_OP_const4u: 225 1.5.2.2 rmind // push immediate 4 byte value 226 1.5.2.2 rmind value = addressSpace.get32(p); 227 1.5.2.2 rmind p += 4; 228 1.5.2.2 rmind *(++sp) = value; 229 1.5.2.2 rmind break; 230 1.5.2.2 rmind 231 1.5.2.2 rmind case DW_OP_const4s: 232 1.5.2.2 rmind // push immediate 4 byte signed value 233 1.5.2.2 rmind svalue = (int32_t)addressSpace.get32(p); 234 1.5.2.2 rmind p += 4; 235 1.5.2.2 rmind *(++sp) = svalue; 236 1.5.2.2 rmind break; 237 1.5.2.2 rmind 238 1.5.2.2 rmind case DW_OP_const8u: 239 1.5.2.2 rmind // push immediate 8 byte value 240 1.5.2.2 rmind value = addressSpace.get64(p); 241 1.5.2.2 rmind p += 8; 242 1.5.2.2 rmind *(++sp) = value; 243 1.5.2.2 rmind break; 244 1.5.2.2 rmind 245 1.5.2.2 rmind case DW_OP_const8s: 246 1.5.2.2 rmind // push immediate 8 byte signed value 247 1.5.2.2 rmind value = (int32_t)addressSpace.get64(p); 248 1.5.2.2 rmind p += 8; 249 1.5.2.2 rmind *(++sp) = value; 250 1.5.2.2 rmind break; 251 1.5.2.2 rmind 252 1.5.2.2 rmind case DW_OP_constu: 253 1.5.2.2 rmind // push immediate ULEB128 value 254 1.5.2.2 rmind value = addressSpace.getULEB128(p, expressionEnd); 255 1.5.2.2 rmind *(++sp) = value; 256 1.5.2.2 rmind break; 257 1.5.2.2 rmind 258 1.5.2.2 rmind case DW_OP_consts: 259 1.5.2.2 rmind // push immediate SLEB128 value 260 1.5.2.2 rmind svalue = addressSpace.getSLEB128(p, expressionEnd); 261 1.5.2.2 rmind *(++sp) = svalue; 262 1.5.2.2 rmind break; 263 1.5.2.2 rmind 264 1.5.2.2 rmind case DW_OP_dup: 265 1.5.2.2 rmind // push top of stack 266 1.5.2.2 rmind value = *sp; 267 1.5.2.2 rmind *(++sp) = value; 268 1.5.2.2 rmind break; 269 1.5.2.2 rmind 270 1.5.2.2 rmind case DW_OP_drop: 271 1.5.2.2 rmind // pop 272 1.5.2.2 rmind --sp; 273 1.5.2.2 rmind break; 274 1.5.2.2 rmind 275 1.5.2.2 rmind case DW_OP_over: 276 1.5.2.2 rmind // dup second 277 1.5.2.2 rmind value = sp[-1]; 278 1.5.2.2 rmind *(++sp) = value; 279 1.5.2.2 rmind break; 280 1.5.2.2 rmind 281 1.5.2.2 rmind case DW_OP_pick: 282 1.5.2.2 rmind // pick from 283 1.5.2.2 rmind reg = addressSpace.get8(p); 284 1.5.2.2 rmind p += 1; 285 1.5.2.2 rmind value = sp[-reg]; 286 1.5.2.2 rmind *(++sp) = value; 287 1.5.2.2 rmind break; 288 1.5.2.2 rmind 289 1.5.2.2 rmind case DW_OP_swap: 290 1.5.2.2 rmind // swap top two 291 1.5.2.2 rmind value = sp[0]; 292 1.5.2.2 rmind sp[0] = sp[-1]; 293 1.5.2.2 rmind sp[-1] = value; 294 1.5.2.2 rmind break; 295 1.5.2.2 rmind 296 1.5.2.2 rmind case DW_OP_rot: 297 1.5.2.2 rmind // rotate top three 298 1.5.2.2 rmind value = sp[0]; 299 1.5.2.2 rmind sp[0] = sp[-1]; 300 1.5.2.2 rmind sp[-1] = sp[-2]; 301 1.5.2.2 rmind sp[-2] = value; 302 1.5.2.2 rmind break; 303 1.5.2.2 rmind 304 1.5.2.2 rmind case DW_OP_xderef: 305 1.5.2.2 rmind // pop stack, dereference, push result 306 1.5.2.2 rmind value = *sp--; 307 1.5.2.2 rmind *sp = *((uint64_t *)value); 308 1.5.2.2 rmind break; 309 1.5.2.2 rmind 310 1.5.2.2 rmind case DW_OP_abs: 311 1.5.2.2 rmind svalue = *sp; 312 1.5.2.2 rmind if (svalue < 0) 313 1.5.2.2 rmind *sp = -svalue; 314 1.5.2.2 rmind break; 315 1.5.2.2 rmind 316 1.5.2.2 rmind case DW_OP_and: 317 1.5.2.2 rmind value = *sp--; 318 1.5.2.2 rmind *sp &= value; 319 1.5.2.2 rmind break; 320 1.5.2.2 rmind 321 1.5.2.2 rmind case DW_OP_div: 322 1.5.2.2 rmind svalue = *sp--; 323 1.5.2.2 rmind *sp = *sp / svalue; 324 1.5.2.2 rmind break; 325 1.5.2.2 rmind 326 1.5.2.2 rmind case DW_OP_minus: 327 1.5.2.2 rmind svalue = *sp--; 328 1.5.2.2 rmind *sp = *sp - svalue; 329 1.5.2.2 rmind break; 330 1.5.2.2 rmind 331 1.5.2.2 rmind case DW_OP_mod: 332 1.5.2.2 rmind svalue = *sp--; 333 1.5.2.2 rmind *sp = *sp % svalue; 334 1.5.2.2 rmind break; 335 1.5.2.2 rmind 336 1.5.2.2 rmind case DW_OP_mul: 337 1.5.2.2 rmind svalue = *sp--; 338 1.5.2.2 rmind *sp = *sp * svalue; 339 1.5.2.2 rmind break; 340 1.5.2.2 rmind 341 1.5.2.2 rmind case DW_OP_neg: 342 1.5.2.2 rmind *sp = 0 - *sp; 343 1.5.2.2 rmind break; 344 1.5.2.2 rmind 345 1.5.2.2 rmind case DW_OP_not: 346 1.5.2.2 rmind svalue = *sp; 347 1.5.2.2 rmind *sp = ~svalue; 348 1.5.2.2 rmind break; 349 1.5.2.2 rmind 350 1.5.2.2 rmind case DW_OP_or: 351 1.5.2.2 rmind value = *sp--; 352 1.5.2.2 rmind *sp |= value; 353 1.5.2.2 rmind break; 354 1.5.2.2 rmind 355 1.5.2.2 rmind case DW_OP_plus: 356 1.5.2.2 rmind value = *sp--; 357 1.5.2.2 rmind *sp += value; 358 1.5.2.2 rmind break; 359 1.5.2.2 rmind 360 1.5.2.2 rmind case DW_OP_plus_uconst: 361 1.5.2.2 rmind // pop stack, add uelb128 constant, push result 362 1.5.2.2 rmind *sp += addressSpace.getULEB128(p, expressionEnd); 363 1.5.2.2 rmind break; 364 1.5.2.2 rmind 365 1.5.2.2 rmind case DW_OP_shl: 366 1.5.2.2 rmind value = *sp--; 367 1.5.2.2 rmind *sp = *sp << value; 368 1.5.2.2 rmind break; 369 1.5.2.2 rmind 370 1.5.2.2 rmind case DW_OP_shr: 371 1.5.2.2 rmind value = *sp--; 372 1.5.2.2 rmind *sp = *sp >> value; 373 1.5.2.2 rmind break; 374 1.5.2.2 rmind 375 1.5.2.2 rmind case DW_OP_shra: 376 1.5.2.2 rmind value = *sp--; 377 1.5.2.2 rmind svalue = *sp; 378 1.5.2.2 rmind *sp = svalue >> value; 379 1.5.2.2 rmind break; 380 1.5.2.2 rmind 381 1.5.2.2 rmind case DW_OP_xor: 382 1.5.2.2 rmind value = *sp--; 383 1.5.2.2 rmind *sp ^= value; 384 1.5.2.2 rmind break; 385 1.5.2.2 rmind 386 1.5.2.2 rmind case DW_OP_skip: 387 1.5.2.2 rmind svalue = (int16_t)addressSpace.get16(p); 388 1.5.2.2 rmind p += 2; 389 1.5.2.2 rmind p += svalue; 390 1.5.2.2 rmind break; 391 1.5.2.2 rmind 392 1.5.2.2 rmind case DW_OP_bra: 393 1.5.2.2 rmind svalue = (int16_t)addressSpace.get16(p); 394 1.5.2.2 rmind p += 2; 395 1.5.2.2 rmind if (*sp--) 396 1.5.2.2 rmind p += svalue; 397 1.5.2.2 rmind break; 398 1.5.2.2 rmind 399 1.5.2.2 rmind case DW_OP_eq: 400 1.5.2.2 rmind value = *sp--; 401 1.5.2.2 rmind *sp = (*sp == value); 402 1.5.2.2 rmind break; 403 1.5.2.2 rmind 404 1.5.2.2 rmind case DW_OP_ge: 405 1.5.2.2 rmind value = *sp--; 406 1.5.2.2 rmind *sp = (*sp >= value); 407 1.5.2.2 rmind break; 408 1.5.2.2 rmind 409 1.5.2.2 rmind case DW_OP_gt: 410 1.5.2.2 rmind value = *sp--; 411 1.5.2.2 rmind *sp = (*sp > value); 412 1.5.2.2 rmind break; 413 1.5.2.2 rmind 414 1.5.2.2 rmind case DW_OP_le: 415 1.5.2.2 rmind value = *sp--; 416 1.5.2.2 rmind *sp = (*sp <= value); 417 1.5.2.2 rmind break; 418 1.5.2.2 rmind 419 1.5.2.2 rmind case DW_OP_lt: 420 1.5.2.2 rmind value = *sp--; 421 1.5.2.2 rmind *sp = (*sp < value); 422 1.5.2.2 rmind break; 423 1.5.2.2 rmind 424 1.5.2.2 rmind case DW_OP_ne: 425 1.5.2.2 rmind value = *sp--; 426 1.5.2.2 rmind *sp = (*sp != value); 427 1.5.2.2 rmind break; 428 1.5.2.2 rmind 429 1.5.2.2 rmind case DW_OP_lit0: 430 1.5.2.2 rmind case DW_OP_lit1: 431 1.5.2.2 rmind case DW_OP_lit2: 432 1.5.2.2 rmind case DW_OP_lit3: 433 1.5.2.2 rmind case DW_OP_lit4: 434 1.5.2.2 rmind case DW_OP_lit5: 435 1.5.2.2 rmind case DW_OP_lit6: 436 1.5.2.2 rmind case DW_OP_lit7: 437 1.5.2.2 rmind case DW_OP_lit8: 438 1.5.2.2 rmind case DW_OP_lit9: 439 1.5.2.2 rmind case DW_OP_lit10: 440 1.5.2.2 rmind case DW_OP_lit11: 441 1.5.2.2 rmind case DW_OP_lit12: 442 1.5.2.2 rmind case DW_OP_lit13: 443 1.5.2.2 rmind case DW_OP_lit14: 444 1.5.2.2 rmind case DW_OP_lit15: 445 1.5.2.2 rmind case DW_OP_lit16: 446 1.5.2.2 rmind case DW_OP_lit17: 447 1.5.2.2 rmind case DW_OP_lit18: 448 1.5.2.2 rmind case DW_OP_lit19: 449 1.5.2.2 rmind case DW_OP_lit20: 450 1.5.2.2 rmind case DW_OP_lit21: 451 1.5.2.2 rmind case DW_OP_lit22: 452 1.5.2.2 rmind case DW_OP_lit23: 453 1.5.2.2 rmind case DW_OP_lit24: 454 1.5.2.2 rmind case DW_OP_lit25: 455 1.5.2.2 rmind case DW_OP_lit26: 456 1.5.2.2 rmind case DW_OP_lit27: 457 1.5.2.2 rmind case DW_OP_lit28: 458 1.5.2.2 rmind case DW_OP_lit29: 459 1.5.2.2 rmind case DW_OP_lit30: 460 1.5.2.2 rmind case DW_OP_lit31: 461 1.5.2.2 rmind value = opcode - DW_OP_lit0; 462 1.5.2.2 rmind *(++sp) = value; 463 1.5.2.2 rmind break; 464 1.5.2.2 rmind 465 1.5.2.2 rmind case DW_OP_reg0: 466 1.5.2.2 rmind case DW_OP_reg1: 467 1.5.2.2 rmind case DW_OP_reg2: 468 1.5.2.2 rmind case DW_OP_reg3: 469 1.5.2.2 rmind case DW_OP_reg4: 470 1.5.2.2 rmind case DW_OP_reg5: 471 1.5.2.2 rmind case DW_OP_reg6: 472 1.5.2.2 rmind case DW_OP_reg7: 473 1.5.2.2 rmind case DW_OP_reg8: 474 1.5.2.2 rmind case DW_OP_reg9: 475 1.5.2.2 rmind case DW_OP_reg10: 476 1.5.2.2 rmind case DW_OP_reg11: 477 1.5.2.2 rmind case DW_OP_reg12: 478 1.5.2.2 rmind case DW_OP_reg13: 479 1.5.2.2 rmind case DW_OP_reg14: 480 1.5.2.2 rmind case DW_OP_reg15: 481 1.5.2.2 rmind case DW_OP_reg16: 482 1.5.2.2 rmind case DW_OP_reg17: 483 1.5.2.2 rmind case DW_OP_reg18: 484 1.5.2.2 rmind case DW_OP_reg19: 485 1.5.2.2 rmind case DW_OP_reg20: 486 1.5.2.2 rmind case DW_OP_reg21: 487 1.5.2.2 rmind case DW_OP_reg22: 488 1.5.2.2 rmind case DW_OP_reg23: 489 1.5.2.2 rmind case DW_OP_reg24: 490 1.5.2.2 rmind case DW_OP_reg25: 491 1.5.2.2 rmind case DW_OP_reg26: 492 1.5.2.2 rmind case DW_OP_reg27: 493 1.5.2.2 rmind case DW_OP_reg28: 494 1.5.2.2 rmind case DW_OP_reg29: 495 1.5.2.2 rmind case DW_OP_reg30: 496 1.5.2.2 rmind case DW_OP_reg31: 497 1.5.2.2 rmind reg = opcode - DW_OP_reg0; 498 1.5.2.2 rmind *(++sp) = registers.getRegister(reg); 499 1.5.2.2 rmind break; 500 1.5.2.2 rmind 501 1.5.2.2 rmind case DW_OP_regx: 502 1.5.2.2 rmind reg = addressSpace.getULEB128(p, expressionEnd); 503 1.5.2.2 rmind *(++sp) = registers.getRegister(reg); 504 1.5.2.2 rmind break; 505 1.5.2.2 rmind 506 1.5.2.2 rmind case DW_OP_breg0: 507 1.5.2.2 rmind case DW_OP_breg1: 508 1.5.2.2 rmind case DW_OP_breg2: 509 1.5.2.2 rmind case DW_OP_breg3: 510 1.5.2.2 rmind case DW_OP_breg4: 511 1.5.2.2 rmind case DW_OP_breg5: 512 1.5.2.2 rmind case DW_OP_breg6: 513 1.5.2.2 rmind case DW_OP_breg7: 514 1.5.2.2 rmind case DW_OP_breg8: 515 1.5.2.2 rmind case DW_OP_breg9: 516 1.5.2.2 rmind case DW_OP_breg10: 517 1.5.2.2 rmind case DW_OP_breg11: 518 1.5.2.2 rmind case DW_OP_breg12: 519 1.5.2.2 rmind case DW_OP_breg13: 520 1.5.2.2 rmind case DW_OP_breg14: 521 1.5.2.2 rmind case DW_OP_breg15: 522 1.5.2.2 rmind case DW_OP_breg16: 523 1.5.2.2 rmind case DW_OP_breg17: 524 1.5.2.2 rmind case DW_OP_breg18: 525 1.5.2.2 rmind case DW_OP_breg19: 526 1.5.2.2 rmind case DW_OP_breg20: 527 1.5.2.2 rmind case DW_OP_breg21: 528 1.5.2.2 rmind case DW_OP_breg22: 529 1.5.2.2 rmind case DW_OP_breg23: 530 1.5.2.2 rmind case DW_OP_breg24: 531 1.5.2.2 rmind case DW_OP_breg25: 532 1.5.2.2 rmind case DW_OP_breg26: 533 1.5.2.2 rmind case DW_OP_breg27: 534 1.5.2.2 rmind case DW_OP_breg28: 535 1.5.2.2 rmind case DW_OP_breg29: 536 1.5.2.2 rmind case DW_OP_breg30: 537 1.5.2.2 rmind case DW_OP_breg31: 538 1.5.2.2 rmind reg = opcode - DW_OP_breg0; 539 1.5.2.2 rmind svalue = addressSpace.getSLEB128(p, expressionEnd); 540 1.5.2.2 rmind *(++sp) = registers.getRegister(reg) + svalue; 541 1.5.2.2 rmind break; 542 1.5.2.2 rmind 543 1.5.2.2 rmind case DW_OP_bregx: 544 1.5.2.2 rmind reg = addressSpace.getULEB128(p, expressionEnd); 545 1.5.2.2 rmind svalue = addressSpace.getSLEB128(p, expressionEnd); 546 1.5.2.2 rmind *(++sp) = registers.getRegister(reg) + svalue; 547 1.5.2.2 rmind break; 548 1.5.2.2 rmind 549 1.5.2.2 rmind case DW_OP_deref_size: 550 1.5.2.2 rmind // pop stack, dereference, push result 551 1.5.2.2 rmind value = *sp--; 552 1.5.2.2 rmind switch (addressSpace.get8(p++)) { 553 1.5.2.2 rmind case 1: 554 1.5.2.2 rmind value = addressSpace.get8(value); 555 1.5.2.2 rmind break; 556 1.5.2.2 rmind case 2: 557 1.5.2.2 rmind value = addressSpace.get16(value); 558 1.5.2.2 rmind break; 559 1.5.2.2 rmind case 4: 560 1.5.2.2 rmind value = addressSpace.get32(value); 561 1.5.2.2 rmind break; 562 1.5.2.2 rmind case 8: 563 1.5.2.2 rmind value = addressSpace.get64(value); 564 1.5.2.2 rmind break; 565 1.5.2.2 rmind default: 566 1.5.2.2 rmind assert(0 && "DW_OP_deref_size with bad size"); 567 1.5.2.2 rmind } 568 1.5.2.2 rmind *(++sp) = value; 569 1.5.2.2 rmind break; 570 1.5.2.2 rmind 571 1.5.2.2 rmind case DW_OP_fbreg: 572 1.5.2.2 rmind case DW_OP_piece: 573 1.5.2.2 rmind case DW_OP_xderef_size: 574 1.5.2.2 rmind case DW_OP_nop: 575 1.5.2.2 rmind case DW_OP_push_object_addres: 576 1.5.2.2 rmind case DW_OP_call2: 577 1.5.2.2 rmind case DW_OP_call4: 578 1.5.2.2 rmind case DW_OP_call_ref: 579 1.5.2.2 rmind default: 580 1.5.2.2 rmind assert(0 && "dwarf opcode not implemented"); 581 1.5.2.2 rmind } 582 1.5.2.2 rmind } 583 1.5.2.2 rmind return *sp; 584 1.5.2.2 rmind } 585 1.5.2.2 rmind 586 1.5.2.2 rmind } // namespace _Unwind 587 1.5.2.2 rmind 588 1.5.2.2 rmind #endif // __DWARF_INSTRUCTIONS_HPP__ 589
Indexes created Thu Sep 25 08:09:54 GMT 2025