Mercurial > hg > truffle
annotate src/cpu/x86/vm/nativeInst_x86.hpp @ 304:dc7f315e41f7
5108146: Merge i486 and amd64 cpu directories
6459804: Want client (c1) compiler for x86_64 (amd64) for faster start-up
Reviewed-by: kvn
| author | never |
|---|---|
| date | Wed, 27 Aug 2008 00:21:55 -0700 |
| parents | d1605aabd0a1 |
| children | 3a26e9e4be71 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // We have interfaces for the following instructions: | |
| 26 // - NativeInstruction | |
| 27 // - - NativeCall | |
| 28 // - - NativeMovConstReg | |
| 29 // - - NativeMovConstRegPatching | |
| 30 // - - NativeMovRegMem | |
| 31 // - - NativeMovRegMemPatching | |
| 32 // - - NativeJump | |
| 33 // - - NativeIllegalOpCode | |
| 34 // - - NativeGeneralJump | |
| 35 // - - NativeReturn | |
| 36 // - - NativeReturnX (return with argument) | |
| 37 // - - NativePushConst | |
| 38 // - - NativeTstRegMem | |
| 39 | |
| 40 // The base class for different kinds of native instruction abstractions. | |
| 41 // Provides the primitive operations to manipulate code relative to this. | |
| 42 | |
| 43 class NativeInstruction VALUE_OBJ_CLASS_SPEC { | |
| 44 friend class Relocation; | |
| 45 | |
| 46 public: | |
| 47 enum Intel_specific_constants { | |
| 48 nop_instruction_code = 0x90, | |
| 49 nop_instruction_size = 1 | |
| 50 }; | |
| 51 | |
| 52 bool is_nop() { return ubyte_at(0) == nop_instruction_code; } | |
|
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53 bool is_dtrace_trap(); |
| 0 | 54 inline bool is_call(); |
| 55 inline bool is_illegal(); | |
| 56 inline bool is_return(); | |
| 57 inline bool is_jump(); | |
| 58 inline bool is_cond_jump(); | |
| 59 inline bool is_safepoint_poll(); | |
| 60 inline bool is_mov_literal64(); | |
| 61 | |
| 62 protected: | |
| 63 address addr_at(int offset) const { return address(this) + offset; } | |
| 64 | |
| 65 s_char sbyte_at(int offset) const { return *(s_char*) addr_at(offset); } | |
| 66 u_char ubyte_at(int offset) const { return *(u_char*) addr_at(offset); } | |
| 67 | |
| 68 jint int_at(int offset) const { return *(jint*) addr_at(offset); } | |
| 69 | |
| 70 intptr_t ptr_at(int offset) const { return *(intptr_t*) addr_at(offset); } | |
| 71 | |
| 72 oop oop_at (int offset) const { return *(oop*) addr_at(offset); } | |
| 73 | |
| 74 | |
| 75 void set_char_at(int offset, char c) { *addr_at(offset) = (u_char)c; wrote(offset); } | |
| 76 void set_int_at(int offset, jint i) { *(jint*)addr_at(offset) = i; wrote(offset); } | |
| 77 void set_ptr_at (int offset, intptr_t ptr) { *(intptr_t*) addr_at(offset) = ptr; wrote(offset); } | |
| 78 void set_oop_at (int offset, oop o) { *(oop*) addr_at(offset) = o; wrote(offset); } | |
| 79 | |
| 80 // This doesn't really do anything on Intel, but it is the place where | |
| 81 // cache invalidation belongs, generically: | |
| 82 void wrote(int offset); | |
| 83 | |
| 84 public: | |
| 85 | |
| 86 // unit test stuff | |
| 87 static void test() {} // override for testing | |
| 88 | |
| 89 inline friend NativeInstruction* nativeInstruction_at(address address); | |
| 90 }; | |
| 91 | |
| 92 inline NativeInstruction* nativeInstruction_at(address address) { | |
| 93 NativeInstruction* inst = (NativeInstruction*)address; | |
| 94 #ifdef ASSERT | |
| 95 //inst->verify(); | |
| 96 #endif | |
| 97 return inst; | |
| 98 } | |
| 99 | |
| 100 inline NativeCall* nativeCall_at(address address); | |
| 101 // The NativeCall is an abstraction for accessing/manipulating native call imm32/rel32off | |
| 102 // instructions (used to manipulate inline caches, primitive & dll calls, etc.). | |
| 103 | |
| 104 class NativeCall: public NativeInstruction { | |
| 105 public: | |
| 106 enum Intel_specific_constants { | |
| 107 instruction_code = 0xE8, | |
| 108 instruction_size = 5, | |
| 109 instruction_offset = 0, | |
| 110 displacement_offset = 1, | |
| 111 return_address_offset = 5 | |
| 112 }; | |
| 113 | |
| 114 enum { cache_line_size = BytesPerWord }; // conservative estimate! | |
| 115 | |
| 116 address instruction_address() const { return addr_at(instruction_offset); } | |
| 117 address next_instruction_address() const { return addr_at(return_address_offset); } | |
| 118 int displacement() const { return (jint) int_at(displacement_offset); } | |
| 119 address displacement_address() const { return addr_at(displacement_offset); } | |
| 120 address return_address() const { return addr_at(return_address_offset); } | |
| 121 address destination() const; | |
| 122 void set_destination(address dest) { | |
| 123 #ifdef AMD64 | |
| 124 assert((labs((intptr_t) dest - (intptr_t) return_address()) & | |
| 125 0xFFFFFFFF00000000) == 0, | |
| 126 "must be 32bit offset"); | |
| 127 #endif // AMD64 | |
| 128 set_int_at(displacement_offset, dest - return_address()); | |
| 129 } | |
| 130 void set_destination_mt_safe(address dest); | |
| 131 | |
| 132 void verify_alignment() { assert((intptr_t)addr_at(displacement_offset) % BytesPerInt == 0, "must be aligned"); } | |
| 133 void verify(); | |
| 134 void print(); | |
| 135 | |
| 136 // Creation | |
| 137 inline friend NativeCall* nativeCall_at(address address); | |
| 138 inline friend NativeCall* nativeCall_before(address return_address); | |
| 139 | |
| 140 static bool is_call_at(address instr) { | |
| 141 return ((*instr) & 0xFF) == NativeCall::instruction_code; | |
| 142 } | |
| 143 | |
| 144 static bool is_call_before(address return_address) { | |
| 145 return is_call_at(return_address - NativeCall::return_address_offset); | |
| 146 } | |
| 147 | |
| 148 static bool is_call_to(address instr, address target) { | |
| 149 return nativeInstruction_at(instr)->is_call() && | |
| 150 nativeCall_at(instr)->destination() == target; | |
| 151 } | |
| 152 | |
| 153 // MT-safe patching of a call instruction. | |
| 154 static void insert(address code_pos, address entry); | |
| 155 | |
| 156 static void replace_mt_safe(address instr_addr, address code_buffer); | |
| 157 }; | |
| 158 | |
| 159 inline NativeCall* nativeCall_at(address address) { | |
| 160 NativeCall* call = (NativeCall*)(address - NativeCall::instruction_offset); | |
| 161 #ifdef ASSERT | |
| 162 call->verify(); | |
| 163 #endif | |
| 164 return call; | |
| 165 } | |
| 166 | |
| 167 inline NativeCall* nativeCall_before(address return_address) { | |
| 168 NativeCall* call = (NativeCall*)(return_address - NativeCall::return_address_offset); | |
| 169 #ifdef ASSERT | |
| 170 call->verify(); | |
| 171 #endif | |
| 172 return call; | |
| 173 } | |
| 174 | |
| 175 // An interface for accessing/manipulating native mov reg, imm32 instructions. | |
| 176 // (used to manipulate inlined 32bit data dll calls, etc.) | |
| 177 class NativeMovConstReg: public NativeInstruction { | |
| 178 #ifdef AMD64 | |
| 179 static const bool has_rex = true; | |
| 180 static const int rex_size = 1; | |
| 181 #else | |
| 182 static const bool has_rex = false; | |
| 183 static const int rex_size = 0; | |
| 184 #endif // AMD64 | |
| 185 public: | |
| 186 enum Intel_specific_constants { | |
| 187 instruction_code = 0xB8, | |
| 188 instruction_size = 1 + rex_size + wordSize, | |
| 189 instruction_offset = 0, | |
| 190 data_offset = 1 + rex_size, | |
| 191 next_instruction_offset = instruction_size, | |
| 192 register_mask = 0x07 | |
| 193 }; | |
| 194 | |
| 195 address instruction_address() const { return addr_at(instruction_offset); } | |
| 196 address next_instruction_address() const { return addr_at(next_instruction_offset); } | |
| 197 intptr_t data() const { return ptr_at(data_offset); } | |
| 198 void set_data(intptr_t x) { set_ptr_at(data_offset, x); } | |
| 199 | |
| 200 void verify(); | |
| 201 void print(); | |
| 202 | |
| 203 // unit test stuff | |
| 204 static void test() {} | |
| 205 | |
| 206 // Creation | |
| 207 inline friend NativeMovConstReg* nativeMovConstReg_at(address address); | |
| 208 inline friend NativeMovConstReg* nativeMovConstReg_before(address address); | |
| 209 }; | |
| 210 | |
| 211 inline NativeMovConstReg* nativeMovConstReg_at(address address) { | |
| 212 NativeMovConstReg* test = (NativeMovConstReg*)(address - NativeMovConstReg::instruction_offset); | |
| 213 #ifdef ASSERT | |
| 214 test->verify(); | |
| 215 #endif | |
| 216 return test; | |
| 217 } | |
| 218 | |
| 219 inline NativeMovConstReg* nativeMovConstReg_before(address address) { | |
| 220 NativeMovConstReg* test = (NativeMovConstReg*)(address - NativeMovConstReg::instruction_size - NativeMovConstReg::instruction_offset); | |
| 221 #ifdef ASSERT | |
| 222 test->verify(); | |
| 223 #endif | |
| 224 return test; | |
| 225 } | |
| 226 | |
| 227 class NativeMovConstRegPatching: public NativeMovConstReg { | |
| 228 private: | |
| 229 friend NativeMovConstRegPatching* nativeMovConstRegPatching_at(address address) { | |
| 230 NativeMovConstRegPatching* test = (NativeMovConstRegPatching*)(address - instruction_offset); | |
| 231 #ifdef ASSERT | |
| 232 test->verify(); | |
| 233 #endif | |
| 234 return test; | |
| 235 } | |
| 236 }; | |
| 237 | |
| 238 // An interface for accessing/manipulating native moves of the form: | |
| 304 | 239 // mov[b/w/l/q] [reg + offset], reg (instruction_code_reg2mem) |
| 240 // mov[b/w/l/q] reg, [reg+offset] (instruction_code_mem2reg | |
| 241 // mov[s/z]x[w/b/q] [reg + offset], reg | |
| 0 | 242 // fld_s [reg+offset] |
| 243 // fld_d [reg+offset] | |
| 244 // fstp_s [reg + offset] | |
| 245 // fstp_d [reg + offset] | |
| 304 | 246 // mov_literal64 scratch,<pointer> ; mov[b/w/l/q] 0(scratch),reg | mov[b/w/l/q] reg,0(scratch) |
| 0 | 247 // |
| 248 // Warning: These routines must be able to handle any instruction sequences | |
| 249 // that are generated as a result of the load/store byte,word,long | |
| 250 // macros. For example: The load_unsigned_byte instruction generates | |
| 251 // an xor reg,reg inst prior to generating the movb instruction. This | |
| 252 // class must skip the xor instruction. | |
| 253 | |
| 254 class NativeMovRegMem: public NativeInstruction { | |
| 255 public: | |
| 256 enum Intel_specific_constants { | |
| 304 | 257 instruction_prefix_wide_lo = Assembler::REX, |
| 258 instruction_prefix_wide_hi = Assembler::REX_WRXB, | |
| 0 | 259 instruction_code_xor = 0x33, |
| 260 instruction_extended_prefix = 0x0F, | |
| 304 | 261 instruction_code_mem2reg_movslq = 0x63, |
| 0 | 262 instruction_code_mem2reg_movzxb = 0xB6, |
| 263 instruction_code_mem2reg_movsxb = 0xBE, | |
| 264 instruction_code_mem2reg_movzxw = 0xB7, | |
| 265 instruction_code_mem2reg_movsxw = 0xBF, | |
| 266 instruction_operandsize_prefix = 0x66, | |
| 304 | 267 instruction_code_reg2mem = 0x89, |
| 268 instruction_code_mem2reg = 0x8b, | |
| 0 | 269 instruction_code_reg2memb = 0x88, |
| 270 instruction_code_mem2regb = 0x8a, | |
| 271 instruction_code_float_s = 0xd9, | |
| 272 instruction_code_float_d = 0xdd, | |
| 273 instruction_code_long_volatile = 0xdf, | |
| 274 instruction_code_xmm_ss_prefix = 0xf3, | |
| 275 instruction_code_xmm_sd_prefix = 0xf2, | |
| 276 instruction_code_xmm_code = 0x0f, | |
| 277 instruction_code_xmm_load = 0x10, | |
| 278 instruction_code_xmm_store = 0x11, | |
| 279 instruction_code_xmm_lpd = 0x12, | |
| 280 | |
| 281 instruction_size = 4, | |
| 282 instruction_offset = 0, | |
| 283 data_offset = 2, | |
| 284 next_instruction_offset = 4 | |
| 285 }; | |
| 286 | |
| 304 | 287 // helper |
| 288 int instruction_start() const; | |
| 289 | |
| 290 address instruction_address() const; | |
| 0 | 291 |
| 304 | 292 address next_instruction_address() const; |
| 0 | 293 |
| 304 | 294 int offset() const; |
| 295 | |
| 296 void set_offset(int x); | |
| 0 | 297 |
| 298 void add_offset_in_bytes(int add_offset) { set_offset ( ( offset() + add_offset ) ); } | |
| 299 | |
| 300 void verify(); | |
| 301 void print (); | |
| 302 | |
| 303 // unit test stuff | |
| 304 static void test() {} | |
| 305 | |
| 306 private: | |
| 307 inline friend NativeMovRegMem* nativeMovRegMem_at (address address); | |
| 308 }; | |
| 309 | |
| 310 inline NativeMovRegMem* nativeMovRegMem_at (address address) { | |
| 311 NativeMovRegMem* test = (NativeMovRegMem*)(address - NativeMovRegMem::instruction_offset); | |
| 312 #ifdef ASSERT | |
| 313 test->verify(); | |
| 314 #endif | |
| 315 return test; | |
| 316 } | |
| 317 | |
| 318 class NativeMovRegMemPatching: public NativeMovRegMem { | |
| 319 private: | |
| 320 friend NativeMovRegMemPatching* nativeMovRegMemPatching_at (address address) { | |
| 321 NativeMovRegMemPatching* test = (NativeMovRegMemPatching*)(address - instruction_offset); | |
| 322 #ifdef ASSERT | |
| 323 test->verify(); | |
| 324 #endif | |
| 325 return test; | |
| 326 } | |
| 327 }; | |
| 328 | |
| 329 | |
| 330 | |
| 331 // An interface for accessing/manipulating native leal instruction of form: | |
| 332 // leal reg, [reg + offset] | |
| 333 | |
| 334 class NativeLoadAddress: public NativeMovRegMem { | |
| 304 | 335 #ifdef AMD64 |
| 336 static const bool has_rex = true; | |
| 337 static const int rex_size = 1; | |
| 338 #else | |
| 339 static const bool has_rex = false; | |
| 340 static const int rex_size = 0; | |
| 341 #endif // AMD64 | |
| 0 | 342 public: |
| 343 enum Intel_specific_constants { | |
| 304 | 344 instruction_prefix_wide = Assembler::REX_W, |
| 345 instruction_prefix_wide_extended = Assembler::REX_WB, | |
| 346 lea_instruction_code = 0x8D, | |
| 347 mov64_instruction_code = 0xB8 | |
| 0 | 348 }; |
| 349 | |
| 350 void verify(); | |
| 351 void print (); | |
| 352 | |
| 353 // unit test stuff | |
| 354 static void test() {} | |
| 355 | |
| 356 private: | |
| 357 friend NativeLoadAddress* nativeLoadAddress_at (address address) { | |
| 358 NativeLoadAddress* test = (NativeLoadAddress*)(address - instruction_offset); | |
| 359 #ifdef ASSERT | |
| 360 test->verify(); | |
| 361 #endif | |
| 362 return test; | |
| 363 } | |
| 364 }; | |
| 365 | |
| 366 // jump rel32off | |
| 367 | |
| 368 class NativeJump: public NativeInstruction { | |
| 369 public: | |
| 370 enum Intel_specific_constants { | |
| 371 instruction_code = 0xe9, | |
| 372 instruction_size = 5, | |
| 373 instruction_offset = 0, | |
| 374 data_offset = 1, | |
| 375 next_instruction_offset = 5 | |
| 376 }; | |
| 377 | |
| 378 address instruction_address() const { return addr_at(instruction_offset); } | |
| 379 address next_instruction_address() const { return addr_at(next_instruction_offset); } | |
| 380 address jump_destination() const { | |
| 381 address dest = (int_at(data_offset)+next_instruction_address()); | |
| 304 | 382 // 32bit used to encode unresolved jmp as jmp -1 |
| 383 // 64bit can't produce this so it used jump to self. | |
| 384 // Now 32bit and 64bit use jump to self as the unresolved address | |
| 385 // which the inline cache code (and relocs) know about | |
| 386 | |
| 0 | 387 // return -1 if jump to self |
| 388 dest = (dest == (address) this) ? (address) -1 : dest; | |
| 389 return dest; | |
| 390 } | |
| 391 | |
| 392 void set_jump_destination(address dest) { | |
| 393 intptr_t val = dest - next_instruction_address(); | |
| 394 #ifdef AMD64 | |
| 304 | 395 assert((labs(val) & 0xFFFFFFFF00000000) == 0 || dest == (address)-1, "must be 32bit offset or -1"); |
| 0 | 396 #endif // AMD64 |
| 397 set_int_at(data_offset, (jint)val); | |
| 398 } | |
| 399 | |
| 400 // Creation | |
| 401 inline friend NativeJump* nativeJump_at(address address); | |
| 402 | |
| 403 void verify(); | |
| 404 | |
| 405 // Unit testing stuff | |
| 406 static void test() {} | |
| 407 | |
| 408 // Insertion of native jump instruction | |
| 409 static void insert(address code_pos, address entry); | |
| 410 // MT-safe insertion of native jump at verified method entry | |
| 411 static void check_verified_entry_alignment(address entry, address verified_entry); | |
| 412 static void patch_verified_entry(address entry, address verified_entry, address dest); | |
| 413 }; | |
| 414 | |
| 415 inline NativeJump* nativeJump_at(address address) { | |
| 416 NativeJump* jump = (NativeJump*)(address - NativeJump::instruction_offset); | |
| 417 #ifdef ASSERT | |
| 418 jump->verify(); | |
| 419 #endif | |
| 420 return jump; | |
| 421 } | |
| 422 | |
| 423 // Handles all kinds of jump on Intel. Long/far, conditional/unconditional | |
| 424 class NativeGeneralJump: public NativeInstruction { | |
| 425 public: | |
| 426 enum Intel_specific_constants { | |
| 427 // Constants does not apply, since the lengths and offsets depends on the actual jump | |
| 428 // used | |
| 429 // Instruction codes: | |
| 430 // Unconditional jumps: 0xE9 (rel32off), 0xEB (rel8off) | |
| 431 // Conditional jumps: 0x0F8x (rel32off), 0x7x (rel8off) | |
| 432 unconditional_long_jump = 0xe9, | |
| 433 unconditional_short_jump = 0xeb, | |
| 434 instruction_size = 5 | |
| 435 }; | |
| 436 | |
| 437 address instruction_address() const { return addr_at(0); } | |
| 438 address jump_destination() const; | |
| 439 | |
| 440 // Creation | |
| 441 inline friend NativeGeneralJump* nativeGeneralJump_at(address address); | |
| 442 | |
| 443 // Insertion of native general jump instruction | |
| 444 static void insert_unconditional(address code_pos, address entry); | |
| 445 static void replace_mt_safe(address instr_addr, address code_buffer); | |
| 446 | |
| 447 void verify(); | |
| 448 }; | |
| 449 | |
| 450 inline NativeGeneralJump* nativeGeneralJump_at(address address) { | |
| 451 NativeGeneralJump* jump = (NativeGeneralJump*)(address); | |
| 452 debug_only(jump->verify();) | |
| 453 return jump; | |
| 454 } | |
| 455 | |
| 456 class NativePopReg : public NativeInstruction { | |
| 457 public: | |
| 458 enum Intel_specific_constants { | |
| 459 instruction_code = 0x58, | |
| 460 instruction_size = 1, | |
| 461 instruction_offset = 0, | |
| 462 data_offset = 1, | |
| 463 next_instruction_offset = 1 | |
| 464 }; | |
| 465 | |
| 466 // Insert a pop instruction | |
| 467 static void insert(address code_pos, Register reg); | |
| 468 }; | |
| 469 | |
| 470 | |
| 471 class NativeIllegalInstruction: public NativeInstruction { | |
| 472 public: | |
| 473 enum Intel_specific_constants { | |
| 474 instruction_code = 0x0B0F, // Real byte order is: 0x0F, 0x0B | |
| 475 instruction_size = 2, | |
| 476 instruction_offset = 0, | |
| 477 next_instruction_offset = 2 | |
| 478 }; | |
| 479 | |
| 480 // Insert illegal opcode as specific address | |
| 481 static void insert(address code_pos); | |
| 482 }; | |
| 483 | |
| 484 // return instruction that does not pop values of the stack | |
| 485 class NativeReturn: public NativeInstruction { | |
| 486 public: | |
| 487 enum Intel_specific_constants { | |
| 488 instruction_code = 0xC3, | |
| 489 instruction_size = 1, | |
| 490 instruction_offset = 0, | |
| 491 next_instruction_offset = 1 | |
| 492 }; | |
| 493 }; | |
| 494 | |
| 495 // return instruction that does pop values of the stack | |
| 496 class NativeReturnX: public NativeInstruction { | |
| 497 public: | |
| 498 enum Intel_specific_constants { | |
| 499 instruction_code = 0xC2, | |
| 500 instruction_size = 2, | |
| 501 instruction_offset = 0, | |
| 502 next_instruction_offset = 2 | |
| 503 }; | |
| 504 }; | |
| 505 | |
| 506 // Simple test vs memory | |
| 507 class NativeTstRegMem: public NativeInstruction { | |
| 508 public: | |
| 509 enum Intel_specific_constants { | |
| 510 instruction_code_memXregl = 0x85 | |
| 511 }; | |
| 512 }; | |
| 513 | |
| 514 inline bool NativeInstruction::is_illegal() { return (short)int_at(0) == (short)NativeIllegalInstruction::instruction_code; } | |
| 515 inline bool NativeInstruction::is_call() { return ubyte_at(0) == NativeCall::instruction_code; } | |
| 516 inline bool NativeInstruction::is_return() { return ubyte_at(0) == NativeReturn::instruction_code || | |
| 517 ubyte_at(0) == NativeReturnX::instruction_code; } | |
| 518 inline bool NativeInstruction::is_jump() { return ubyte_at(0) == NativeJump::instruction_code || | |
| 519 ubyte_at(0) == 0xEB; /* short jump */ } | |
| 520 inline bool NativeInstruction::is_cond_jump() { return (int_at(0) & 0xF0FF) == 0x800F /* long jump */ || | |
| 521 (ubyte_at(0) & 0xF0) == 0x70; /* short jump */ } | |
| 522 inline bool NativeInstruction::is_safepoint_poll() { | |
| 523 #ifdef AMD64 | |
| 304 | 524 if ( ubyte_at(0) == NativeTstRegMem::instruction_code_memXregl && |
| 525 ubyte_at(1) == 0x05 ) { // 00 rax 101 | |
| 526 address fault = addr_at(6) + int_at(2); | |
| 527 return os::is_poll_address(fault); | |
| 528 } else { | |
| 529 return false; | |
| 530 } | |
| 0 | 531 #else |
| 304 | 532 return ( ubyte_at(0) == NativeMovRegMem::instruction_code_mem2reg || |
| 0 | 533 ubyte_at(0) == NativeTstRegMem::instruction_code_memXregl ) && |
| 534 (ubyte_at(1)&0xC7) == 0x05 && /* Mod R/M == disp32 */ | |
| 535 (os::is_poll_address((address)int_at(2))); | |
| 536 #endif // AMD64 | |
| 537 } | |
| 538 | |
| 539 inline bool NativeInstruction::is_mov_literal64() { | |
| 540 #ifdef AMD64 | |
| 541 return ((ubyte_at(0) == Assembler::REX_W || ubyte_at(0) == Assembler::REX_WB) && | |
| 542 (ubyte_at(1) & (0xff ^ NativeMovConstReg::register_mask)) == 0xB8); | |
| 543 #else | |
| 544 return false; | |
| 545 #endif // AMD64 | |
| 546 } |