Mercurial > hg > truffle
annotate src/cpu/sparc/vm/nativeInst_sparc.cpp @ 18408:2c3666f44855
Truffle: initial commit of object API implementation
| author | Andreas Woess <andreas.woess@jku.at> |
|---|---|
| date | Tue, 18 Nov 2014 23:19:43 +0100 |
| parents | cefad50507d8 |
| children | b51e29501f30 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
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28 #include "code/codeCache.hpp" |
| 1972 | 29 #include "memory/resourceArea.hpp" |
| 30 #include "nativeInst_sparc.hpp" | |
| 31 #include "oops/oop.inline.hpp" | |
| 32 #include "runtime/handles.hpp" | |
| 33 #include "runtime/sharedRuntime.hpp" | |
| 34 #include "runtime/stubRoutines.hpp" | |
| 35 #include "utilities/ostream.hpp" | |
| 36 #ifdef COMPILER1 | |
| 37 #include "c1/c1_Runtime1.hpp" | |
| 38 #endif | |
| 0 | 39 |
| 40 | |
|
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41 bool NativeInstruction::is_dtrace_trap() { |
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42 return !is_nop(); |
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43 } |
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44 |
| 0 | 45 void NativeInstruction::set_data64_sethi(address instaddr, intptr_t x) { |
| 46 ResourceMark rm; | |
| 47 CodeBuffer buf(instaddr, 10 * BytesPerInstWord ); | |
| 48 MacroAssembler* _masm = new MacroAssembler(&buf); | |
| 49 Register destreg; | |
| 50 | |
| 51 destreg = inv_rd(*(unsigned int *)instaddr); | |
| 52 // Generate a the new sequence | |
| 727 | 53 _masm->patchable_sethi(x, destreg); |
| 0 | 54 ICache::invalidate_range(instaddr, 7 * BytesPerInstWord); |
| 55 } | |
| 56 | |
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57 void NativeInstruction::verify_data64_sethi(address instaddr, intptr_t x) { |
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58 ResourceMark rm; |
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59 unsigned char buffer[10 * BytesPerInstWord]; |
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60 CodeBuffer buf(buffer, 10 * BytesPerInstWord); |
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61 MacroAssembler masm(&buf); |
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62 |
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63 Register destreg = inv_rd(*(unsigned int *)instaddr); |
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64 // Generate the proper sequence into a temporary buffer and compare |
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65 // it with the original sequence. |
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66 masm.patchable_sethi(x, destreg); |
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67 int len = buffer - masm.pc(); |
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68 for (int i = 0; i < len; i++) { |
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69 assert(instaddr[i] == buffer[i], "instructions must match"); |
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70 } |
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71 } |
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72 |
| 0 | 73 void NativeInstruction::verify() { |
| 74 // make sure code pattern is actually an instruction address | |
| 75 address addr = addr_at(0); | |
| 76 if (addr == 0 || ((intptr_t)addr & 3) != 0) { | |
| 77 fatal("not an instruction address"); | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 void NativeInstruction::print() { | |
| 82 tty->print_cr(INTPTR_FORMAT ": 0x%x", addr_at(0), long_at(0)); | |
| 83 } | |
| 84 | |
| 85 void NativeInstruction::set_long_at(int offset, int i) { | |
| 86 address addr = addr_at(offset); | |
| 87 *(int*)addr = i; | |
| 88 ICache::invalidate_word(addr); | |
| 89 } | |
| 90 | |
| 91 void NativeInstruction::set_jlong_at(int offset, jlong i) { | |
| 92 address addr = addr_at(offset); | |
| 93 *(jlong*)addr = i; | |
| 94 // Don't need to invalidate 2 words here, because | |
| 95 // the flush instruction operates on doublewords. | |
| 96 ICache::invalidate_word(addr); | |
| 97 } | |
| 98 | |
| 99 void NativeInstruction::set_addr_at(int offset, address x) { | |
| 100 address addr = addr_at(offset); | |
| 101 assert( ((intptr_t)addr & (wordSize-1)) == 0, "set_addr_at bad address alignment"); | |
| 102 *(uintptr_t*)addr = (uintptr_t)x; | |
| 103 // Don't need to invalidate 2 words here in the 64-bit case, | |
| 104 // because the flush instruction operates on doublewords. | |
| 105 ICache::invalidate_word(addr); | |
| 106 // The Intel code has this assertion for NativeCall::set_destination, | |
| 107 // NativeMovConstReg::set_data, NativeMovRegMem::set_offset, | |
| 108 // NativeJump::set_jump_destination, and NativePushImm32::set_data | |
| 109 //assert (Patching_lock->owned_by_self(), "must hold lock to patch instruction") | |
| 110 } | |
| 111 | |
| 112 bool NativeInstruction::is_zero_test(Register ®) { | |
| 113 int x = long_at(0); | |
| 114 Assembler::op3s temp = (Assembler::op3s) (Assembler::sub_op3 | Assembler::cc_bit_op3); | |
| 115 if (is_op3(x, temp, Assembler::arith_op) && | |
| 116 inv_immed(x) && inv_rd(x) == G0) { | |
| 117 if (inv_rs1(x) == G0) { | |
| 118 reg = inv_rs2(x); | |
| 119 return true; | |
| 120 } else if (inv_rs2(x) == G0) { | |
| 121 reg = inv_rs1(x); | |
| 122 return true; | |
| 123 } | |
| 124 } | |
| 125 return false; | |
| 126 } | |
| 127 | |
| 128 bool NativeInstruction::is_load_store_with_small_offset(Register reg) { | |
| 129 int x = long_at(0); | |
| 130 if (is_op(x, Assembler::ldst_op) && | |
| 131 inv_rs1(x) == reg && inv_immed(x)) { | |
| 132 return true; | |
| 133 } | |
| 134 return false; | |
| 135 } | |
| 136 | |
| 137 void NativeCall::verify() { | |
| 138 NativeInstruction::verify(); | |
| 139 // make sure code pattern is actually a call instruction | |
| 140 if (!is_op(long_at(0), Assembler::call_op)) { | |
| 141 fatal("not a call"); | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 void NativeCall::print() { | |
| 146 tty->print_cr(INTPTR_FORMAT ": call " INTPTR_FORMAT, instruction_address(), destination()); | |
| 147 } | |
| 148 | |
| 149 | |
| 150 // MT-safe patching of a call instruction (and following word). | |
| 151 // First patches the second word, and then atomicly replaces | |
| 152 // the first word with the first new instruction word. | |
| 153 // Other processors might briefly see the old first word | |
| 154 // followed by the new second word. This is OK if the old | |
| 155 // second word is harmless, and the new second word may be | |
| 156 // harmlessly executed in the delay slot of the call. | |
| 157 void NativeCall::replace_mt_safe(address instr_addr, address code_buffer) { | |
| 158 assert(Patching_lock->is_locked() || | |
| 159 SafepointSynchronize::is_at_safepoint(), "concurrent code patching"); | |
| 160 assert (instr_addr != NULL, "illegal address for code patching"); | |
| 161 NativeCall* n_call = nativeCall_at (instr_addr); // checking that it is a call | |
| 162 assert(NativeCall::instruction_size == 8, "wrong instruction size; must be 8"); | |
| 163 int i0 = ((int*)code_buffer)[0]; | |
| 164 int i1 = ((int*)code_buffer)[1]; | |
| 165 int* contention_addr = (int*) n_call->addr_at(1*BytesPerInstWord); | |
| 166 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
| 10997 | 167 *contention_addr == nop_instruction(), |
| 0 | 168 "must not interfere with original call"); |
| 169 // The set_long_at calls do the ICacheInvalidate so we just need to do them in reverse order | |
| 170 n_call->set_long_at(1*BytesPerInstWord, i1); | |
| 171 n_call->set_long_at(0*BytesPerInstWord, i0); | |
| 172 // NOTE: It is possible that another thread T will execute | |
| 173 // only the second patched word. | |
| 174 // In other words, since the original instruction is this | |
| 175 // call patching_stub; nop (NativeCall) | |
| 176 // and the new sequence from the buffer is this: | |
| 177 // sethi %hi(K), %r; add %r, %lo(K), %r (NativeMovConstReg) | |
| 178 // what T will execute is this: | |
| 179 // call patching_stub; add %r, %lo(K), %r | |
| 180 // thereby putting garbage into %r before calling the patching stub. | |
| 181 // This is OK, because the patching stub ignores the value of %r. | |
| 182 | |
| 183 // Make sure the first-patched instruction, which may co-exist | |
| 184 // briefly with the call, will do something harmless. | |
| 185 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
| 10997 | 186 *contention_addr == nop_instruction(), |
| 0 | 187 "must not interfere with original call"); |
| 188 } | |
| 189 | |
| 190 // Similar to replace_mt_safe, but just changes the destination. The | |
| 191 // important thing is that free-running threads are able to execute this | |
| 192 // call instruction at all times. Thus, the displacement field must be | |
| 193 // instruction-word-aligned. This is always true on SPARC. | |
| 194 // | |
| 195 // Used in the runtime linkage of calls; see class CompiledIC. | |
| 196 void NativeCall::set_destination_mt_safe(address dest) { | |
| 197 assert(Patching_lock->is_locked() || | |
| 198 SafepointSynchronize::is_at_safepoint(), "concurrent code patching"); | |
| 199 // set_destination uses set_long_at which does the ICache::invalidate | |
| 200 set_destination(dest); | |
| 201 } | |
| 202 | |
| 203 // Code for unit testing implementation of NativeCall class | |
| 204 void NativeCall::test() { | |
| 205 #ifdef ASSERT | |
| 206 ResourceMark rm; | |
| 207 CodeBuffer cb("test", 100, 100); | |
| 208 MacroAssembler* a = new MacroAssembler(&cb); | |
| 209 NativeCall *nc; | |
| 210 uint idx; | |
| 211 int offsets[] = { | |
| 212 0x0, | |
| 213 0xfffffff0, | |
| 214 0x7ffffff0, | |
| 215 0x80000000, | |
| 216 0x20, | |
| 217 0x4000, | |
| 218 }; | |
| 219 | |
| 220 VM_Version::allow_all(); | |
| 221 | |
| 222 a->call( a->pc(), relocInfo::none ); | |
| 223 a->delayed()->nop(); | |
| 1748 | 224 nc = nativeCall_at( cb.insts_begin() ); |
| 0 | 225 nc->print(); |
| 226 | |
| 227 nc = nativeCall_overwriting_at( nc->next_instruction_address() ); | |
| 228 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
| 1748 | 229 nc->set_destination( cb.insts_begin() + offsets[idx] ); |
| 230 assert(nc->destination() == (cb.insts_begin() + offsets[idx]), "check unit test"); | |
| 0 | 231 nc->print(); |
| 232 } | |
| 233 | |
| 1748 | 234 nc = nativeCall_before( cb.insts_begin() + 8 ); |
| 0 | 235 nc->print(); |
| 236 | |
| 237 VM_Version::revert(); | |
| 238 #endif | |
| 239 } | |
| 240 // End code for unit testing implementation of NativeCall class | |
| 241 | |
| 242 //------------------------------------------------------------------- | |
| 243 | |
| 244 #ifdef _LP64 | |
| 245 | |
| 246 void NativeFarCall::set_destination(address dest) { | |
| 247 // Address materialized in the instruction stream, so nothing to do. | |
| 248 return; | |
| 249 #if 0 // What we'd do if we really did want to change the destination | |
| 250 if (destination() == dest) { | |
| 251 return; | |
| 252 } | |
| 253 ResourceMark rm; | |
| 254 CodeBuffer buf(addr_at(0), instruction_size + 1); | |
| 255 MacroAssembler* _masm = new MacroAssembler(&buf); | |
| 256 // Generate the new sequence | |
| 727 | 257 AddressLiteral(dest); |
| 258 _masm->jumpl_to(dest, O7, O7); | |
| 0 | 259 ICache::invalidate_range(addr_at(0), instruction_size ); |
| 260 #endif | |
| 261 } | |
| 262 | |
| 263 void NativeFarCall::verify() { | |
| 264 // make sure code pattern is actually a jumpl_to instruction | |
| 265 assert((int)instruction_size == (int)NativeJump::instruction_size, "same as jump_to"); | |
| 266 assert((int)jmpl_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
| 267 nativeJump_at(addr_at(0))->verify(); | |
| 268 } | |
| 269 | |
| 270 bool NativeFarCall::is_call_at(address instr) { | |
| 271 return nativeInstruction_at(instr)->is_sethi(); | |
| 272 } | |
| 273 | |
| 274 void NativeFarCall::print() { | |
| 275 tty->print_cr(INTPTR_FORMAT ": call " INTPTR_FORMAT, instruction_address(), destination()); | |
| 276 } | |
| 277 | |
| 278 bool NativeFarCall::destination_is_compiled_verified_entry_point() { | |
| 279 nmethod* callee = CodeCache::find_nmethod(destination()); | |
| 280 if (callee == NULL) { | |
| 281 return false; | |
| 282 } else { | |
| 283 return destination() == callee->verified_entry_point(); | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 // MT-safe patching of a far call. | |
| 288 void NativeFarCall::replace_mt_safe(address instr_addr, address code_buffer) { | |
| 289 Unimplemented(); | |
| 290 } | |
| 291 | |
| 292 // Code for unit testing implementation of NativeFarCall class | |
| 293 void NativeFarCall::test() { | |
| 294 Unimplemented(); | |
| 295 } | |
| 296 // End code for unit testing implementation of NativeFarCall class | |
| 297 | |
| 298 #endif // _LP64 | |
| 299 | |
| 300 //------------------------------------------------------------------- | |
| 301 | |
| 302 | |
| 303 void NativeMovConstReg::verify() { | |
| 304 NativeInstruction::verify(); | |
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305 // make sure code pattern is actually a "set_metadata" synthetic instruction |
| 0 | 306 // see MacroAssembler::set_oop() |
| 307 int i0 = long_at(sethi_offset); | |
| 308 int i1 = long_at(add_offset); | |
| 309 | |
| 310 // verify the pattern "sethi %hi22(imm), reg ; add reg, %lo10(imm), reg" | |
| 311 Register rd = inv_rd(i0); | |
| 312 #ifndef _LP64 | |
| 313 if (!(is_op2(i0, Assembler::sethi_op2) && rd != G0 && | |
| 314 is_op3(i1, Assembler::add_op3, Assembler::arith_op) && | |
| 315 inv_immed(i1) && (unsigned)get_simm13(i1) < (1 << 10) && | |
| 316 rd == inv_rs1(i1) && rd == inv_rd(i1))) { | |
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317 fatal("not a set_metadata"); |
| 0 | 318 } |
| 319 #else | |
| 320 if (!is_op2(i0, Assembler::sethi_op2) && rd != G0 ) { | |
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321 fatal("not a set_metadata"); |
| 0 | 322 } |
| 323 #endif | |
| 324 } | |
| 325 | |
| 326 | |
| 327 void NativeMovConstReg::print() { | |
| 328 tty->print_cr(INTPTR_FORMAT ": mov reg, " INTPTR_FORMAT, instruction_address(), data()); | |
| 329 } | |
| 330 | |
| 331 | |
| 332 #ifdef _LP64 | |
| 333 intptr_t NativeMovConstReg::data() const { | |
| 334 return data64(addr_at(sethi_offset), long_at(add_offset)); | |
| 335 } | |
| 336 #else | |
| 337 intptr_t NativeMovConstReg::data() const { | |
| 338 return data32(long_at(sethi_offset), long_at(add_offset)); | |
| 339 } | |
| 340 #endif | |
| 341 | |
| 342 | |
| 343 void NativeMovConstReg::set_data(intptr_t x) { | |
| 344 #ifdef _LP64 | |
| 345 set_data64_sethi(addr_at(sethi_offset), x); | |
| 346 #else | |
| 347 set_long_at(sethi_offset, set_data32_sethi( long_at(sethi_offset), x)); | |
| 348 #endif | |
| 349 set_long_at(add_offset, set_data32_simm13( long_at(add_offset), x)); | |
| 350 | |
| 351 // also store the value into an oop_Relocation cell, if any | |
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352 CodeBlob* cb = CodeCache::find_blob(instruction_address()); |
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353 nmethod* nm = cb ? cb->as_nmethod_or_null() : NULL; |
| 0 | 354 if (nm != NULL) { |
| 355 RelocIterator iter(nm, instruction_address(), next_instruction_address()); | |
| 356 oop* oop_addr = NULL; | |
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357 Metadata** metadata_addr = NULL; |
| 0 | 358 while (iter.next()) { |
| 359 if (iter.type() == relocInfo::oop_type) { | |
| 360 oop_Relocation *r = iter.oop_reloc(); | |
| 361 if (oop_addr == NULL) { | |
| 362 oop_addr = r->oop_addr(); | |
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363 *oop_addr = cast_to_oop(x); |
| 0 | 364 } else { |
| 365 assert(oop_addr == r->oop_addr(), "must be only one set-oop here"); | |
| 366 } | |
| 367 } | |
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368 if (iter.type() == relocInfo::metadata_type) { |
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369 metadata_Relocation *r = iter.metadata_reloc(); |
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370 if (metadata_addr == NULL) { |
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371 metadata_addr = r->metadata_addr(); |
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372 *metadata_addr = (Metadata*)x; |
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373 } else { |
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374 assert(metadata_addr == r->metadata_addr(), "must be only one set-metadata here"); |
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375 } |
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376 } |
| 0 | 377 } |
| 378 } | |
| 379 } | |
| 380 | |
| 381 | |
| 382 // Code for unit testing implementation of NativeMovConstReg class | |
| 383 void NativeMovConstReg::test() { | |
| 384 #ifdef ASSERT | |
| 385 ResourceMark rm; | |
| 386 CodeBuffer cb("test", 100, 100); | |
| 387 MacroAssembler* a = new MacroAssembler(&cb); | |
| 388 NativeMovConstReg* nm; | |
| 389 uint idx; | |
| 390 int offsets[] = { | |
| 391 0x0, | |
| 392 0x7fffffff, | |
| 393 0x80000000, | |
| 394 0xffffffff, | |
| 395 0x20, | |
| 396 4096, | |
| 397 4097, | |
| 398 }; | |
| 399 | |
| 400 VM_Version::allow_all(); | |
| 401 | |
| 727 | 402 AddressLiteral al1(0xaaaabbbb, relocInfo::external_word_type); |
| 403 a->sethi(al1, I3); | |
| 404 a->add(I3, al1.low10(), I3); | |
| 405 AddressLiteral al2(0xccccdddd, relocInfo::external_word_type); | |
| 406 a->sethi(al2, O2); | |
| 407 a->add(O2, al2.low10(), O2); | |
| 0 | 408 |
| 1748 | 409 nm = nativeMovConstReg_at( cb.insts_begin() ); |
| 0 | 410 nm->print(); |
| 411 | |
| 412 nm = nativeMovConstReg_at( nm->next_instruction_address() ); | |
| 413 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
| 414 nm->set_data( offsets[idx] ); | |
| 415 assert(nm->data() == offsets[idx], "check unit test"); | |
| 416 } | |
| 417 nm->print(); | |
| 418 | |
| 419 VM_Version::revert(); | |
| 420 #endif | |
| 421 } | |
| 422 // End code for unit testing implementation of NativeMovConstReg class | |
| 423 | |
| 424 //------------------------------------------------------------------- | |
| 425 | |
| 426 void NativeMovConstRegPatching::verify() { | |
| 427 NativeInstruction::verify(); | |
| 428 // Make sure code pattern is sethi/nop/add. | |
| 429 int i0 = long_at(sethi_offset); | |
| 430 int i1 = long_at(nop_offset); | |
| 431 int i2 = long_at(add_offset); | |
| 432 assert((int)nop_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
| 433 | |
| 434 // Verify the pattern "sethi %hi22(imm), reg; nop; add reg, %lo10(imm), reg" | |
| 435 // The casual reader should note that on Sparc a nop is a special case if sethi | |
| 436 // in which the destination register is %g0. | |
| 437 Register rd0 = inv_rd(i0); | |
| 438 Register rd1 = inv_rd(i1); | |
| 439 if (!(is_op2(i0, Assembler::sethi_op2) && rd0 != G0 && | |
| 440 is_op2(i1, Assembler::sethi_op2) && rd1 == G0 && // nop is a special case of sethi | |
| 441 is_op3(i2, Assembler::add_op3, Assembler::arith_op) && | |
| 442 inv_immed(i2) && (unsigned)get_simm13(i2) < (1 << 10) && | |
| 443 rd0 == inv_rs1(i2) && rd0 == inv_rd(i2))) { | |
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444 fatal("not a set_metadata"); |
| 0 | 445 } |
| 446 } | |
| 447 | |
| 448 | |
| 449 void NativeMovConstRegPatching::print() { | |
| 450 tty->print_cr(INTPTR_FORMAT ": mov reg, " INTPTR_FORMAT, instruction_address(), data()); | |
| 451 } | |
| 452 | |
| 453 | |
| 454 int NativeMovConstRegPatching::data() const { | |
| 455 #ifdef _LP64 | |
| 456 return data64(addr_at(sethi_offset), long_at(add_offset)); | |
| 457 #else | |
| 458 return data32(long_at(sethi_offset), long_at(add_offset)); | |
| 459 #endif | |
| 460 } | |
| 461 | |
| 462 | |
| 463 void NativeMovConstRegPatching::set_data(int x) { | |
| 464 #ifdef _LP64 | |
| 465 set_data64_sethi(addr_at(sethi_offset), x); | |
| 466 #else | |
| 467 set_long_at(sethi_offset, set_data32_sethi(long_at(sethi_offset), x)); | |
| 468 #endif | |
| 469 set_long_at(add_offset, set_data32_simm13(long_at(add_offset), x)); | |
| 470 | |
| 471 // also store the value into an oop_Relocation cell, if any | |
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472 CodeBlob* cb = CodeCache::find_blob(instruction_address()); |
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473 nmethod* nm = cb ? cb->as_nmethod_or_null() : NULL; |
| 0 | 474 if (nm != NULL) { |
| 475 RelocIterator iter(nm, instruction_address(), next_instruction_address()); | |
| 476 oop* oop_addr = NULL; | |
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477 Metadata** metadata_addr = NULL; |
| 0 | 478 while (iter.next()) { |
| 479 if (iter.type() == relocInfo::oop_type) { | |
| 480 oop_Relocation *r = iter.oop_reloc(); | |
| 481 if (oop_addr == NULL) { | |
| 482 oop_addr = r->oop_addr(); | |
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483 *oop_addr = cast_to_oop(x); |
| 0 | 484 } else { |
| 485 assert(oop_addr == r->oop_addr(), "must be only one set-oop here"); | |
| 486 } | |
| 487 } | |
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488 if (iter.type() == relocInfo::metadata_type) { |
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489 metadata_Relocation *r = iter.metadata_reloc(); |
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490 if (metadata_addr == NULL) { |
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491 metadata_addr = r->metadata_addr(); |
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492 *metadata_addr = (Metadata*)x; |
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493 } else { |
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494 assert(metadata_addr == r->metadata_addr(), "must be only one set-metadata here"); |
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495 } |
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496 } |
| 0 | 497 } |
| 498 } | |
| 499 } | |
| 500 | |
| 501 | |
| 502 // Code for unit testing implementation of NativeMovConstRegPatching class | |
| 503 void NativeMovConstRegPatching::test() { | |
| 504 #ifdef ASSERT | |
| 505 ResourceMark rm; | |
| 506 CodeBuffer cb("test", 100, 100); | |
| 507 MacroAssembler* a = new MacroAssembler(&cb); | |
| 508 NativeMovConstRegPatching* nm; | |
| 509 uint idx; | |
| 510 int offsets[] = { | |
| 511 0x0, | |
| 512 0x7fffffff, | |
| 513 0x80000000, | |
| 514 0xffffffff, | |
| 515 0x20, | |
| 516 4096, | |
| 517 4097, | |
| 518 }; | |
| 519 | |
| 520 VM_Version::allow_all(); | |
| 521 | |
| 727 | 522 AddressLiteral al1(0xaaaabbbb, relocInfo::external_word_type); |
| 523 a->sethi(al1, I3); | |
| 0 | 524 a->nop(); |
| 727 | 525 a->add(I3, al1.low10(), I3); |
| 526 AddressLiteral al2(0xccccdddd, relocInfo::external_word_type); | |
| 527 a->sethi(al2, O2); | |
| 0 | 528 a->nop(); |
| 727 | 529 a->add(O2, al2.low10(), O2); |
| 0 | 530 |
| 1748 | 531 nm = nativeMovConstRegPatching_at( cb.insts_begin() ); |
| 0 | 532 nm->print(); |
| 533 | |
| 534 nm = nativeMovConstRegPatching_at( nm->next_instruction_address() ); | |
| 535 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
| 536 nm->set_data( offsets[idx] ); | |
| 537 assert(nm->data() == offsets[idx], "check unit test"); | |
| 538 } | |
| 539 nm->print(); | |
| 540 | |
| 541 VM_Version::revert(); | |
| 542 #endif // ASSERT | |
| 543 } | |
| 544 // End code for unit testing implementation of NativeMovConstRegPatching class | |
| 545 | |
| 546 | |
| 547 //------------------------------------------------------------------- | |
| 548 | |
| 549 | |
| 550 void NativeMovRegMem::copy_instruction_to(address new_instruction_address) { | |
| 551 Untested("copy_instruction_to"); | |
| 552 int instruction_size = next_instruction_address() - instruction_address(); | |
| 553 for (int i = 0; i < instruction_size; i += BytesPerInstWord) { | |
| 554 *(int*)(new_instruction_address + i) = *(int*)(address(this) + i); | |
| 555 } | |
| 556 } | |
| 557 | |
| 558 | |
| 559 void NativeMovRegMem::verify() { | |
| 560 NativeInstruction::verify(); | |
| 561 // make sure code pattern is actually a "ld" or "st" of some sort. | |
| 562 int i0 = long_at(0); | |
| 563 int op3 = inv_op3(i0); | |
| 564 | |
| 565 assert((int)add_offset == NativeMovConstReg::add_offset, "sethi size ok"); | |
| 566 | |
| 567 if (!(is_op(i0, Assembler::ldst_op) && | |
| 568 inv_immed(i0) && | |
| 569 0 != (op3 < op3_ldst_int_limit | |
| 570 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
| 571 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf)))) | |
| 572 { | |
| 573 int i1 = long_at(ldst_offset); | |
| 574 Register rd = inv_rd(i0); | |
| 575 | |
| 576 op3 = inv_op3(i1); | |
| 577 if (!is_op(i1, Assembler::ldst_op) && rd == inv_rs2(i1) && | |
| 578 0 != (op3 < op3_ldst_int_limit | |
| 579 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
| 580 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))) { | |
| 581 fatal("not a ld* or st* op"); | |
| 582 } | |
| 583 } | |
| 584 } | |
| 585 | |
| 586 | |
| 587 void NativeMovRegMem::print() { | |
| 588 if (is_immediate()) { | |
| 589 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + %x]", instruction_address(), offset()); | |
| 590 } else { | |
| 591 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + reg]", instruction_address()); | |
| 592 } | |
| 593 } | |
| 594 | |
| 595 | |
| 596 // Code for unit testing implementation of NativeMovRegMem class | |
| 597 void NativeMovRegMem::test() { | |
| 598 #ifdef ASSERT | |
| 599 ResourceMark rm; | |
| 600 CodeBuffer cb("test", 1000, 1000); | |
| 601 MacroAssembler* a = new MacroAssembler(&cb); | |
| 602 NativeMovRegMem* nm; | |
| 603 uint idx = 0; | |
| 604 uint idx1; | |
| 605 int offsets[] = { | |
| 606 0x0, | |
| 607 0xffffffff, | |
| 608 0x7fffffff, | |
| 609 0x80000000, | |
| 610 4096, | |
| 611 4097, | |
| 612 0x20, | |
| 613 0x4000, | |
| 614 }; | |
| 615 | |
| 616 VM_Version::allow_all(); | |
| 617 | |
| 727 | 618 AddressLiteral al1(0xffffffff, relocInfo::external_word_type); |
| 619 AddressLiteral al2(0xaaaabbbb, relocInfo::external_word_type); | |
| 620 a->ldsw( G5, al1.low10(), G4 ); idx++; | |
| 621 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 622 a->ldsw( G5, I3, G4 ); idx++; |
| 727 | 623 a->ldsb( G5, al1.low10(), G4 ); idx++; |
| 624 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 625 a->ldsb( G5, I3, G4 ); idx++; |
| 727 | 626 a->ldsh( G5, al1.low10(), G4 ); idx++; |
| 627 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 628 a->ldsh( G5, I3, G4 ); idx++; |
| 727 | 629 a->lduw( G5, al1.low10(), G4 ); idx++; |
| 630 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 631 a->lduw( G5, I3, G4 ); idx++; |
| 727 | 632 a->ldub( G5, al1.low10(), G4 ); idx++; |
| 633 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 634 a->ldub( G5, I3, G4 ); idx++; |
| 727 | 635 a->lduh( G5, al1.low10(), G4 ); idx++; |
| 636 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 637 a->lduh( G5, I3, G4 ); idx++; |
| 727 | 638 a->ldx( G5, al1.low10(), G4 ); idx++; |
| 639 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 640 a->ldx( G5, I3, G4 ); idx++; |
| 727 | 641 a->ldd( G5, al1.low10(), G4 ); idx++; |
| 642 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 643 a->ldd( G5, I3, G4 ); idx++; |
| 644 a->ldf( FloatRegisterImpl::D, O2, -1, F14 ); idx++; | |
| 727 | 645 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); |
| 0 | 646 a->ldf( FloatRegisterImpl::S, O0, I3, F15 ); idx++; |
| 647 | |
| 727 | 648 a->stw( G5, G4, al1.low10() ); idx++; |
| 649 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 650 a->stw( G5, G4, I3 ); idx++; |
| 727 | 651 a->stb( G5, G4, al1.low10() ); idx++; |
| 652 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 653 a->stb( G5, G4, I3 ); idx++; |
| 727 | 654 a->sth( G5, G4, al1.low10() ); idx++; |
| 655 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 656 a->sth( G5, G4, I3 ); idx++; |
| 727 | 657 a->stx( G5, G4, al1.low10() ); idx++; |
| 658 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 659 a->stx( G5, G4, I3 ); idx++; |
| 727 | 660 a->std( G5, G4, al1.low10() ); idx++; |
| 661 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
| 0 | 662 a->std( G5, G4, I3 ); idx++; |
| 663 a->stf( FloatRegisterImpl::S, F18, O2, -1 ); idx++; | |
| 727 | 664 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); |
| 0 | 665 a->stf( FloatRegisterImpl::S, F15, O0, I3 ); idx++; |
| 666 | |
| 1748 | 667 nm = nativeMovRegMem_at( cb.insts_begin() ); |
| 0 | 668 nm->print(); |
| 669 nm->set_offset( low10(0) ); | |
| 670 nm->print(); | |
| 671 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
| 672 nm->print(); | |
| 673 | |
| 674 while (--idx) { | |
| 675 nm = nativeMovRegMem_at( nm->next_instruction_address() ); | |
| 676 nm->print(); | |
| 677 for (idx1 = 0; idx1 < ARRAY_SIZE(offsets); idx1++) { | |
| 678 nm->set_offset( nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1] ); | |
| 679 assert(nm->offset() == (nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1]), | |
| 680 "check unit test"); | |
| 681 nm->print(); | |
| 682 } | |
| 683 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
| 684 nm->print(); | |
| 685 } | |
| 686 | |
| 687 VM_Version::revert(); | |
| 688 #endif // ASSERT | |
| 689 } | |
| 690 | |
| 691 // End code for unit testing implementation of NativeMovRegMem class | |
| 692 | |
| 693 //-------------------------------------------------------------------------------- | |
| 694 | |
| 695 | |
| 696 void NativeMovRegMemPatching::copy_instruction_to(address new_instruction_address) { | |
| 697 Untested("copy_instruction_to"); | |
| 698 int instruction_size = next_instruction_address() - instruction_address(); | |
| 699 for (int i = 0; i < instruction_size; i += wordSize) { | |
| 700 *(long*)(new_instruction_address + i) = *(long*)(address(this) + i); | |
| 701 } | |
| 702 } | |
| 703 | |
| 704 | |
| 705 void NativeMovRegMemPatching::verify() { | |
| 706 NativeInstruction::verify(); | |
| 707 // make sure code pattern is actually a "ld" or "st" of some sort. | |
| 708 int i0 = long_at(0); | |
| 709 int op3 = inv_op3(i0); | |
| 710 | |
| 711 assert((int)nop_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
| 712 | |
| 713 if (!(is_op(i0, Assembler::ldst_op) && | |
| 714 inv_immed(i0) && | |
| 715 0 != (op3 < op3_ldst_int_limit | |
| 716 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
| 717 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf)))) { | |
| 718 int i1 = long_at(ldst_offset); | |
| 719 Register rd = inv_rd(i0); | |
| 720 | |
| 721 op3 = inv_op3(i1); | |
| 722 if (!is_op(i1, Assembler::ldst_op) && rd == inv_rs2(i1) && | |
| 723 0 != (op3 < op3_ldst_int_limit | |
| 724 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
| 725 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))) { | |
| 726 fatal("not a ld* or st* op"); | |
| 727 } | |
| 728 } | |
| 729 } | |
| 730 | |
| 731 | |
| 732 void NativeMovRegMemPatching::print() { | |
| 733 if (is_immediate()) { | |
| 734 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + %x]", instruction_address(), offset()); | |
| 735 } else { | |
| 736 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + reg]", instruction_address()); | |
| 737 } | |
| 738 } | |
| 739 | |
| 740 | |
| 741 // Code for unit testing implementation of NativeMovRegMemPatching class | |
| 742 void NativeMovRegMemPatching::test() { | |
| 743 #ifdef ASSERT | |
| 744 ResourceMark rm; | |
| 745 CodeBuffer cb("test", 1000, 1000); | |
| 746 MacroAssembler* a = new MacroAssembler(&cb); | |
| 747 NativeMovRegMemPatching* nm; | |
| 748 uint idx = 0; | |
| 749 uint idx1; | |
| 750 int offsets[] = { | |
| 751 0x0, | |
| 752 0xffffffff, | |
| 753 0x7fffffff, | |
| 754 0x80000000, | |
| 755 4096, | |
| 756 4097, | |
| 757 0x20, | |
| 758 0x4000, | |
| 759 }; | |
| 760 | |
| 761 VM_Version::allow_all(); | |
| 762 | |
| 727 | 763 AddressLiteral al(0xffffffff, relocInfo::external_word_type); |
| 764 a->ldsw( G5, al.low10(), G4); idx++; | |
| 765 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 766 a->ldsw( G5, I3, G4 ); idx++; |
| 727 | 767 a->ldsb( G5, al.low10(), G4); idx++; |
| 768 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 769 a->ldsb( G5, I3, G4 ); idx++; |
| 727 | 770 a->ldsh( G5, al.low10(), G4); idx++; |
| 771 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 772 a->ldsh( G5, I3, G4 ); idx++; |
| 727 | 773 a->lduw( G5, al.low10(), G4); idx++; |
| 774 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 775 a->lduw( G5, I3, G4 ); idx++; |
| 727 | 776 a->ldub( G5, al.low10(), G4); idx++; |
| 777 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 778 a->ldub( G5, I3, G4 ); idx++; |
| 727 | 779 a->lduh( G5, al.low10(), G4); idx++; |
| 780 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 781 a->lduh( G5, I3, G4 ); idx++; |
| 727 | 782 a->ldx( G5, al.low10(), G4); idx++; |
| 783 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 784 a->ldx( G5, I3, G4 ); idx++; | |
| 785 a->ldd( G5, al.low10(), G4); idx++; | |
| 786 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 787 a->ldd( G5, I3, G4 ); idx++; | |
| 788 a->ldf( FloatRegisterImpl::D, O2, -1, F14 ); idx++; | |
| 789 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 790 a->ldf( FloatRegisterImpl::S, O0, I3, F15 ); idx++; | |
| 0 | 791 |
| 727 | 792 a->stw( G5, G4, al.low10()); idx++; |
| 793 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 794 a->stw( G5, G4, I3 ); idx++; |
| 727 | 795 a->stb( G5, G4, al.low10()); idx++; |
| 796 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 797 a->stb( G5, G4, I3 ); idx++; |
| 727 | 798 a->sth( G5, G4, al.low10()); idx++; |
| 799 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 800 a->sth( G5, G4, I3 ); idx++; |
| 727 | 801 a->stx( G5, G4, al.low10()); idx++; |
| 802 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 803 a->stx( G5, G4, I3 ); idx++; |
| 727 | 804 a->std( G5, G4, al.low10()); idx++; |
| 805 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
| 0 | 806 a->std( G5, G4, I3 ); idx++; |
| 807 a->stf( FloatRegisterImpl::S, F18, O2, -1 ); idx++; | |
| 727 | 808 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); |
| 0 | 809 a->stf( FloatRegisterImpl::S, F15, O0, I3 ); idx++; |
| 810 | |
| 1748 | 811 nm = nativeMovRegMemPatching_at( cb.insts_begin() ); |
| 0 | 812 nm->print(); |
| 813 nm->set_offset( low10(0) ); | |
| 814 nm->print(); | |
| 815 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
| 816 nm->print(); | |
| 817 | |
| 818 while (--idx) { | |
| 819 nm = nativeMovRegMemPatching_at( nm->next_instruction_address() ); | |
| 820 nm->print(); | |
| 821 for (idx1 = 0; idx1 < ARRAY_SIZE(offsets); idx1++) { | |
| 822 nm->set_offset( nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1] ); | |
| 823 assert(nm->offset() == (nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1]), | |
| 824 "check unit test"); | |
| 825 nm->print(); | |
| 826 } | |
| 827 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
| 828 nm->print(); | |
| 829 } | |
| 830 | |
| 831 VM_Version::revert(); | |
| 832 #endif // ASSERT | |
| 833 } | |
| 834 // End code for unit testing implementation of NativeMovRegMemPatching class | |
| 835 | |
| 836 | |
| 837 //-------------------------------------------------------------------------------- | |
| 838 | |
| 839 | |
| 840 void NativeJump::verify() { | |
| 841 NativeInstruction::verify(); | |
| 842 int i0 = long_at(sethi_offset); | |
| 843 int i1 = long_at(jmpl_offset); | |
| 844 assert((int)jmpl_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
| 845 // verify the pattern "sethi %hi22(imm), treg ; jmpl treg, %lo10(imm), lreg" | |
| 846 Register rd = inv_rd(i0); | |
| 847 #ifndef _LP64 | |
| 848 if (!(is_op2(i0, Assembler::sethi_op2) && rd != G0 && | |
| 849 (is_op3(i1, Assembler::jmpl_op3, Assembler::arith_op) || | |
| 850 (TraceJumps && is_op3(i1, Assembler::add_op3, Assembler::arith_op))) && | |
| 851 inv_immed(i1) && (unsigned)get_simm13(i1) < (1 << 10) && | |
| 852 rd == inv_rs1(i1))) { | |
| 853 fatal("not a jump_to instruction"); | |
| 854 } | |
| 855 #else | |
| 856 // In LP64, the jump instruction location varies for non relocatable | |
| 857 // jumps, for example is could be sethi, xor, jmp instead of the | |
| 858 // 7 instructions for sethi. So let's check sethi only. | |
| 859 if (!is_op2(i0, Assembler::sethi_op2) && rd != G0 ) { | |
| 860 fatal("not a jump_to instruction"); | |
| 861 } | |
| 862 #endif | |
| 863 } | |
| 864 | |
| 865 | |
| 866 void NativeJump::print() { | |
| 867 tty->print_cr(INTPTR_FORMAT ": jmpl reg, " INTPTR_FORMAT, instruction_address(), jump_destination()); | |
| 868 } | |
| 869 | |
| 870 | |
| 871 // Code for unit testing implementation of NativeJump class | |
| 872 void NativeJump::test() { | |
| 873 #ifdef ASSERT | |
| 874 ResourceMark rm; | |
| 875 CodeBuffer cb("test", 100, 100); | |
| 876 MacroAssembler* a = new MacroAssembler(&cb); | |
| 877 NativeJump* nj; | |
| 878 uint idx; | |
| 879 int offsets[] = { | |
| 880 0x0, | |
| 881 0xffffffff, | |
| 882 0x7fffffff, | |
| 883 0x80000000, | |
| 884 4096, | |
| 885 4097, | |
| 886 0x20, | |
| 887 0x4000, | |
| 888 }; | |
| 889 | |
| 890 VM_Version::allow_all(); | |
| 891 | |
| 727 | 892 AddressLiteral al(0x7fffbbbb, relocInfo::external_word_type); |
| 893 a->sethi(al, I3); | |
| 894 a->jmpl(I3, al.low10(), G0, RelocationHolder::none); | |
| 0 | 895 a->delayed()->nop(); |
| 727 | 896 a->sethi(al, I3); |
| 897 a->jmpl(I3, al.low10(), L3, RelocationHolder::none); | |
| 0 | 898 a->delayed()->nop(); |
| 899 | |
| 1748 | 900 nj = nativeJump_at( cb.insts_begin() ); |
| 0 | 901 nj->print(); |
| 902 | |
| 903 nj = nativeJump_at( nj->next_instruction_address() ); | |
| 904 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
| 905 nj->set_jump_destination( nj->instruction_address() + offsets[idx] ); | |
| 906 assert(nj->jump_destination() == (nj->instruction_address() + offsets[idx]), "check unit test"); | |
| 907 nj->print(); | |
| 908 } | |
| 909 | |
| 910 VM_Version::revert(); | |
| 911 #endif // ASSERT | |
| 912 } | |
| 913 // End code for unit testing implementation of NativeJump class | |
| 914 | |
| 915 | |
| 916 void NativeJump::insert(address code_pos, address entry) { | |
| 917 Unimplemented(); | |
| 918 } | |
| 919 | |
| 920 // MT safe inserting of a jump over an unknown instruction sequence (used by nmethod::makeZombie) | |
| 921 // The problem: jump_to <dest> is a 3-word instruction (including its delay slot). | |
| 922 // Atomic write can be only with 1 word. | |
| 923 void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) { | |
| 924 // Here's one way to do it: Pre-allocate a three-word jump sequence somewhere | |
| 925 // in the header of the nmethod, within a short branch's span of the patch point. | |
| 926 // Set up the jump sequence using NativeJump::insert, and then use an annulled | |
| 927 // unconditional branch at the target site (an atomic 1-word update). | |
| 928 // Limitations: You can only patch nmethods, with any given nmethod patched at | |
| 929 // most once, and the patch must be in the nmethod's header. | |
| 930 // It's messy, but you can ask the CodeCache for the nmethod containing the | |
| 931 // target address. | |
| 932 | |
| 933 // %%%%% For now, do something MT-stupid: | |
| 934 ResourceMark rm; | |
| 935 int code_size = 1 * BytesPerInstWord; | |
| 936 CodeBuffer cb(verified_entry, code_size + 1); | |
| 937 MacroAssembler* a = new MacroAssembler(&cb); | |
| 10997 | 938 a->ldsw(G0, 0, O7); // "ld" must agree with code in the signal handler |
| 0 | 939 ICache::invalidate_range(verified_entry, code_size); |
| 940 } | |
| 941 | |
| 942 | |
| 943 void NativeIllegalInstruction::insert(address code_pos) { | |
| 944 NativeIllegalInstruction* nii = (NativeIllegalInstruction*) nativeInstruction_at(code_pos); | |
| 945 nii->set_long_at(0, illegal_instruction()); | |
| 946 } | |
| 947 | |
| 948 static int illegal_instruction_bits = 0; | |
| 949 | |
| 950 int NativeInstruction::illegal_instruction() { | |
| 951 if (illegal_instruction_bits == 0) { | |
| 952 ResourceMark rm; | |
| 953 char buf[40]; | |
| 954 CodeBuffer cbuf((address)&buf[0], 20); | |
| 955 MacroAssembler* a = new MacroAssembler(&cbuf); | |
| 956 address ia = a->pc(); | |
| 957 a->trap(ST_RESERVED_FOR_USER_0 + 1); | |
| 958 int bits = *(int*)ia; | |
| 959 assert(is_op3(bits, Assembler::trap_op3, Assembler::arith_op), "bad instruction"); | |
| 960 illegal_instruction_bits = bits; | |
| 961 assert(illegal_instruction_bits != 0, "oops"); | |
| 962 } | |
| 963 return illegal_instruction_bits; | |
| 964 } | |
| 965 | |
| 966 static int ic_miss_trap_bits = 0; | |
| 967 | |
| 968 bool NativeInstruction::is_ic_miss_trap() { | |
| 969 if (ic_miss_trap_bits == 0) { | |
| 970 ResourceMark rm; | |
| 971 char buf[40]; | |
| 972 CodeBuffer cbuf((address)&buf[0], 20); | |
| 973 MacroAssembler* a = new MacroAssembler(&cbuf); | |
| 974 address ia = a->pc(); | |
| 975 a->trap(Assembler::notEqual, Assembler::ptr_cc, G0, ST_RESERVED_FOR_USER_0 + 2); | |
| 976 int bits = *(int*)ia; | |
| 977 assert(is_op3(bits, Assembler::trap_op3, Assembler::arith_op), "bad instruction"); | |
| 978 ic_miss_trap_bits = bits; | |
| 979 assert(ic_miss_trap_bits != 0, "oops"); | |
| 980 } | |
| 981 return long_at(0) == ic_miss_trap_bits; | |
| 982 } | |
| 983 | |
| 984 | |
| 985 bool NativeInstruction::is_illegal() { | |
| 986 if (illegal_instruction_bits == 0) { | |
| 987 return false; | |
| 988 } | |
| 989 return long_at(0) == illegal_instruction_bits; | |
| 990 } | |
| 991 | |
| 992 | |
| 993 void NativeGeneralJump::verify() { | |
| 994 assert(((NativeInstruction *)this)->is_jump() || | |
| 995 ((NativeInstruction *)this)->is_cond_jump(), "not a general jump instruction"); | |
| 996 } | |
| 997 | |
| 998 | |
| 999 void NativeGeneralJump::insert_unconditional(address code_pos, address entry) { | |
| 1000 Assembler::Condition condition = Assembler::always; | |
| 1001 int x = Assembler::op2(Assembler::br_op2) | Assembler::annul(false) | | |
| 1002 Assembler::cond(condition) | Assembler::wdisp((intptr_t)entry, (intptr_t)code_pos, 22); | |
| 1003 NativeGeneralJump* ni = (NativeGeneralJump*) nativeInstruction_at(code_pos); | |
| 1004 ni->set_long_at(0, x); | |
| 1005 } | |
| 1006 | |
| 1007 | |
| 1008 // MT-safe patching of a jmp instruction (and following word). | |
| 1009 // First patches the second word, and then atomicly replaces | |
| 1010 // the first word with the first new instruction word. | |
| 1011 // Other processors might briefly see the old first word | |
| 1012 // followed by the new second word. This is OK if the old | |
| 1013 // second word is harmless, and the new second word may be | |
| 1014 // harmlessly executed in the delay slot of the call. | |
| 1015 void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) { | |
| 1016 assert(Patching_lock->is_locked() || | |
| 1017 SafepointSynchronize::is_at_safepoint(), "concurrent code patching"); | |
| 1018 assert (instr_addr != NULL, "illegal address for code patching"); | |
| 1019 NativeGeneralJump* h_jump = nativeGeneralJump_at (instr_addr); // checking that it is a call | |
| 1020 assert(NativeGeneralJump::instruction_size == 8, "wrong instruction size; must be 8"); | |
| 1021 int i0 = ((int*)code_buffer)[0]; | |
| 1022 int i1 = ((int*)code_buffer)[1]; | |
| 1023 int* contention_addr = (int*) h_jump->addr_at(1*BytesPerInstWord); | |
| 1024 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
| 10997 | 1025 *contention_addr == nop_instruction(), |
| 0 | 1026 "must not interfere with original call"); |
| 1027 // The set_long_at calls do the ICacheInvalidate so we just need to do them in reverse order | |
| 1028 h_jump->set_long_at(1*BytesPerInstWord, i1); | |
| 1029 h_jump->set_long_at(0*BytesPerInstWord, i0); | |
| 1030 // NOTE: It is possible that another thread T will execute | |
| 1031 // only the second patched word. | |
| 1032 // In other words, since the original instruction is this | |
| 1033 // jmp patching_stub; nop (NativeGeneralJump) | |
| 1034 // and the new sequence from the buffer is this: | |
| 1035 // sethi %hi(K), %r; add %r, %lo(K), %r (NativeMovConstReg) | |
| 1036 // what T will execute is this: | |
| 1037 // jmp patching_stub; add %r, %lo(K), %r | |
| 1038 // thereby putting garbage into %r before calling the patching stub. | |
| 1039 // This is OK, because the patching stub ignores the value of %r. | |
| 1040 | |
| 1041 // Make sure the first-patched instruction, which may co-exist | |
| 1042 // briefly with the call, will do something harmless. | |
| 1043 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
| 10997 | 1044 *contention_addr == nop_instruction(), |
| 0 | 1045 "must not interfere with original call"); |
| 1046 } |