Mercurial > hg > truffle
annotate src/cpu/sparc/vm/nativeInst_sparc.cpp @ 2396:b868d9928221
Merge
author | twisti |
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date | Thu, 24 Mar 2011 23:04:40 -0700 |
parents | f95d63e2154a |
children | d673ef06fe96 |
rev | line source |
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0 | 1 /* |
1579 | 2 * Copyright (c) 1997, 2010, 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 * | |
1552
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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" |
26 #include "assembler_sparc.inline.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "nativeInst_sparc.hpp" | |
29 #include "oops/oop.inline.hpp" | |
30 #include "runtime/handles.hpp" | |
31 #include "runtime/sharedRuntime.hpp" | |
32 #include "runtime/stubRoutines.hpp" | |
33 #include "utilities/ostream.hpp" | |
34 #ifdef COMPILER1 | |
35 #include "c1/c1_Runtime1.hpp" | |
36 #endif | |
0 | 37 |
38 | |
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39 bool NativeInstruction::is_dtrace_trap() { |
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40 return !is_nop(); |
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41 } |
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42 |
0 | 43 void NativeInstruction::set_data64_sethi(address instaddr, intptr_t x) { |
44 ResourceMark rm; | |
45 CodeBuffer buf(instaddr, 10 * BytesPerInstWord ); | |
46 MacroAssembler* _masm = new MacroAssembler(&buf); | |
47 Register destreg; | |
48 | |
49 destreg = inv_rd(*(unsigned int *)instaddr); | |
50 // Generate a the new sequence | |
727 | 51 _masm->patchable_sethi(x, destreg); |
0 | 52 ICache::invalidate_range(instaddr, 7 * BytesPerInstWord); |
53 } | |
54 | |
55 void NativeInstruction::verify() { | |
56 // make sure code pattern is actually an instruction address | |
57 address addr = addr_at(0); | |
58 if (addr == 0 || ((intptr_t)addr & 3) != 0) { | |
59 fatal("not an instruction address"); | |
60 } | |
61 } | |
62 | |
63 void NativeInstruction::print() { | |
64 tty->print_cr(INTPTR_FORMAT ": 0x%x", addr_at(0), long_at(0)); | |
65 } | |
66 | |
67 void NativeInstruction::set_long_at(int offset, int i) { | |
68 address addr = addr_at(offset); | |
69 *(int*)addr = i; | |
70 ICache::invalidate_word(addr); | |
71 } | |
72 | |
73 void NativeInstruction::set_jlong_at(int offset, jlong i) { | |
74 address addr = addr_at(offset); | |
75 *(jlong*)addr = i; | |
76 // Don't need to invalidate 2 words here, because | |
77 // the flush instruction operates on doublewords. | |
78 ICache::invalidate_word(addr); | |
79 } | |
80 | |
81 void NativeInstruction::set_addr_at(int offset, address x) { | |
82 address addr = addr_at(offset); | |
83 assert( ((intptr_t)addr & (wordSize-1)) == 0, "set_addr_at bad address alignment"); | |
84 *(uintptr_t*)addr = (uintptr_t)x; | |
85 // Don't need to invalidate 2 words here in the 64-bit case, | |
86 // because the flush instruction operates on doublewords. | |
87 ICache::invalidate_word(addr); | |
88 // The Intel code has this assertion for NativeCall::set_destination, | |
89 // NativeMovConstReg::set_data, NativeMovRegMem::set_offset, | |
90 // NativeJump::set_jump_destination, and NativePushImm32::set_data | |
91 //assert (Patching_lock->owned_by_self(), "must hold lock to patch instruction") | |
92 } | |
93 | |
94 bool NativeInstruction::is_zero_test(Register ®) { | |
95 int x = long_at(0); | |
96 Assembler::op3s temp = (Assembler::op3s) (Assembler::sub_op3 | Assembler::cc_bit_op3); | |
97 if (is_op3(x, temp, Assembler::arith_op) && | |
98 inv_immed(x) && inv_rd(x) == G0) { | |
99 if (inv_rs1(x) == G0) { | |
100 reg = inv_rs2(x); | |
101 return true; | |
102 } else if (inv_rs2(x) == G0) { | |
103 reg = inv_rs1(x); | |
104 return true; | |
105 } | |
106 } | |
107 return false; | |
108 } | |
109 | |
110 bool NativeInstruction::is_load_store_with_small_offset(Register reg) { | |
111 int x = long_at(0); | |
112 if (is_op(x, Assembler::ldst_op) && | |
113 inv_rs1(x) == reg && inv_immed(x)) { | |
114 return true; | |
115 } | |
116 return false; | |
117 } | |
118 | |
119 void NativeCall::verify() { | |
120 NativeInstruction::verify(); | |
121 // make sure code pattern is actually a call instruction | |
122 if (!is_op(long_at(0), Assembler::call_op)) { | |
123 fatal("not a call"); | |
124 } | |
125 } | |
126 | |
127 void NativeCall::print() { | |
128 tty->print_cr(INTPTR_FORMAT ": call " INTPTR_FORMAT, instruction_address(), destination()); | |
129 } | |
130 | |
131 | |
132 // MT-safe patching of a call instruction (and following word). | |
133 // First patches the second word, and then atomicly replaces | |
134 // the first word with the first new instruction word. | |
135 // Other processors might briefly see the old first word | |
136 // followed by the new second word. This is OK if the old | |
137 // second word is harmless, and the new second word may be | |
138 // harmlessly executed in the delay slot of the call. | |
139 void NativeCall::replace_mt_safe(address instr_addr, address code_buffer) { | |
140 assert(Patching_lock->is_locked() || | |
141 SafepointSynchronize::is_at_safepoint(), "concurrent code patching"); | |
142 assert (instr_addr != NULL, "illegal address for code patching"); | |
143 NativeCall* n_call = nativeCall_at (instr_addr); // checking that it is a call | |
144 assert(NativeCall::instruction_size == 8, "wrong instruction size; must be 8"); | |
145 int i0 = ((int*)code_buffer)[0]; | |
146 int i1 = ((int*)code_buffer)[1]; | |
147 int* contention_addr = (int*) n_call->addr_at(1*BytesPerInstWord); | |
148 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
149 *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(), | |
150 "must not interfere with original call"); | |
151 // The set_long_at calls do the ICacheInvalidate so we just need to do them in reverse order | |
152 n_call->set_long_at(1*BytesPerInstWord, i1); | |
153 n_call->set_long_at(0*BytesPerInstWord, i0); | |
154 // NOTE: It is possible that another thread T will execute | |
155 // only the second patched word. | |
156 // In other words, since the original instruction is this | |
157 // call patching_stub; nop (NativeCall) | |
158 // and the new sequence from the buffer is this: | |
159 // sethi %hi(K), %r; add %r, %lo(K), %r (NativeMovConstReg) | |
160 // what T will execute is this: | |
161 // call patching_stub; add %r, %lo(K), %r | |
162 // thereby putting garbage into %r before calling the patching stub. | |
163 // This is OK, because the patching stub ignores the value of %r. | |
164 | |
165 // Make sure the first-patched instruction, which may co-exist | |
166 // briefly with the call, will do something harmless. | |
167 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
168 *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(), | |
169 "must not interfere with original call"); | |
170 } | |
171 | |
172 // Similar to replace_mt_safe, but just changes the destination. The | |
173 // important thing is that free-running threads are able to execute this | |
174 // call instruction at all times. Thus, the displacement field must be | |
175 // instruction-word-aligned. This is always true on SPARC. | |
176 // | |
177 // Used in the runtime linkage of calls; see class CompiledIC. | |
178 void NativeCall::set_destination_mt_safe(address dest) { | |
179 assert(Patching_lock->is_locked() || | |
180 SafepointSynchronize::is_at_safepoint(), "concurrent code patching"); | |
181 // set_destination uses set_long_at which does the ICache::invalidate | |
182 set_destination(dest); | |
183 } | |
184 | |
185 // Code for unit testing implementation of NativeCall class | |
186 void NativeCall::test() { | |
187 #ifdef ASSERT | |
188 ResourceMark rm; | |
189 CodeBuffer cb("test", 100, 100); | |
190 MacroAssembler* a = new MacroAssembler(&cb); | |
191 NativeCall *nc; | |
192 uint idx; | |
193 int offsets[] = { | |
194 0x0, | |
195 0xfffffff0, | |
196 0x7ffffff0, | |
197 0x80000000, | |
198 0x20, | |
199 0x4000, | |
200 }; | |
201 | |
202 VM_Version::allow_all(); | |
203 | |
204 a->call( a->pc(), relocInfo::none ); | |
205 a->delayed()->nop(); | |
1748 | 206 nc = nativeCall_at( cb.insts_begin() ); |
0 | 207 nc->print(); |
208 | |
209 nc = nativeCall_overwriting_at( nc->next_instruction_address() ); | |
210 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
1748 | 211 nc->set_destination( cb.insts_begin() + offsets[idx] ); |
212 assert(nc->destination() == (cb.insts_begin() + offsets[idx]), "check unit test"); | |
0 | 213 nc->print(); |
214 } | |
215 | |
1748 | 216 nc = nativeCall_before( cb.insts_begin() + 8 ); |
0 | 217 nc->print(); |
218 | |
219 VM_Version::revert(); | |
220 #endif | |
221 } | |
222 // End code for unit testing implementation of NativeCall class | |
223 | |
224 //------------------------------------------------------------------- | |
225 | |
226 #ifdef _LP64 | |
227 | |
228 void NativeFarCall::set_destination(address dest) { | |
229 // Address materialized in the instruction stream, so nothing to do. | |
230 return; | |
231 #if 0 // What we'd do if we really did want to change the destination | |
232 if (destination() == dest) { | |
233 return; | |
234 } | |
235 ResourceMark rm; | |
236 CodeBuffer buf(addr_at(0), instruction_size + 1); | |
237 MacroAssembler* _masm = new MacroAssembler(&buf); | |
238 // Generate the new sequence | |
727 | 239 AddressLiteral(dest); |
240 _masm->jumpl_to(dest, O7, O7); | |
0 | 241 ICache::invalidate_range(addr_at(0), instruction_size ); |
242 #endif | |
243 } | |
244 | |
245 void NativeFarCall::verify() { | |
246 // make sure code pattern is actually a jumpl_to instruction | |
247 assert((int)instruction_size == (int)NativeJump::instruction_size, "same as jump_to"); | |
248 assert((int)jmpl_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
249 nativeJump_at(addr_at(0))->verify(); | |
250 } | |
251 | |
252 bool NativeFarCall::is_call_at(address instr) { | |
253 return nativeInstruction_at(instr)->is_sethi(); | |
254 } | |
255 | |
256 void NativeFarCall::print() { | |
257 tty->print_cr(INTPTR_FORMAT ": call " INTPTR_FORMAT, instruction_address(), destination()); | |
258 } | |
259 | |
260 bool NativeFarCall::destination_is_compiled_verified_entry_point() { | |
261 nmethod* callee = CodeCache::find_nmethod(destination()); | |
262 if (callee == NULL) { | |
263 return false; | |
264 } else { | |
265 return destination() == callee->verified_entry_point(); | |
266 } | |
267 } | |
268 | |
269 // MT-safe patching of a far call. | |
270 void NativeFarCall::replace_mt_safe(address instr_addr, address code_buffer) { | |
271 Unimplemented(); | |
272 } | |
273 | |
274 // Code for unit testing implementation of NativeFarCall class | |
275 void NativeFarCall::test() { | |
276 Unimplemented(); | |
277 } | |
278 // End code for unit testing implementation of NativeFarCall class | |
279 | |
280 #endif // _LP64 | |
281 | |
282 //------------------------------------------------------------------- | |
283 | |
284 | |
285 void NativeMovConstReg::verify() { | |
286 NativeInstruction::verify(); | |
287 // make sure code pattern is actually a "set_oop" synthetic instruction | |
288 // see MacroAssembler::set_oop() | |
289 int i0 = long_at(sethi_offset); | |
290 int i1 = long_at(add_offset); | |
291 | |
292 // verify the pattern "sethi %hi22(imm), reg ; add reg, %lo10(imm), reg" | |
293 Register rd = inv_rd(i0); | |
294 #ifndef _LP64 | |
295 if (!(is_op2(i0, Assembler::sethi_op2) && rd != G0 && | |
296 is_op3(i1, Assembler::add_op3, Assembler::arith_op) && | |
297 inv_immed(i1) && (unsigned)get_simm13(i1) < (1 << 10) && | |
298 rd == inv_rs1(i1) && rd == inv_rd(i1))) { | |
299 fatal("not a set_oop"); | |
300 } | |
301 #else | |
302 if (!is_op2(i0, Assembler::sethi_op2) && rd != G0 ) { | |
303 fatal("not a set_oop"); | |
304 } | |
305 #endif | |
306 } | |
307 | |
308 | |
309 void NativeMovConstReg::print() { | |
310 tty->print_cr(INTPTR_FORMAT ": mov reg, " INTPTR_FORMAT, instruction_address(), data()); | |
311 } | |
312 | |
313 | |
314 #ifdef _LP64 | |
315 intptr_t NativeMovConstReg::data() const { | |
316 return data64(addr_at(sethi_offset), long_at(add_offset)); | |
317 } | |
318 #else | |
319 intptr_t NativeMovConstReg::data() const { | |
320 return data32(long_at(sethi_offset), long_at(add_offset)); | |
321 } | |
322 #endif | |
323 | |
324 | |
325 void NativeMovConstReg::set_data(intptr_t x) { | |
326 #ifdef _LP64 | |
327 set_data64_sethi(addr_at(sethi_offset), x); | |
328 #else | |
329 set_long_at(sethi_offset, set_data32_sethi( long_at(sethi_offset), x)); | |
330 #endif | |
331 set_long_at(add_offset, set_data32_simm13( long_at(add_offset), x)); | |
332 | |
333 // also store the value into an oop_Relocation cell, if any | |
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334 CodeBlob* cb = CodeCache::find_blob(instruction_address()); |
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335 nmethod* nm = cb ? cb->as_nmethod_or_null() : NULL; |
0 | 336 if (nm != NULL) { |
337 RelocIterator iter(nm, instruction_address(), next_instruction_address()); | |
338 oop* oop_addr = NULL; | |
339 while (iter.next()) { | |
340 if (iter.type() == relocInfo::oop_type) { | |
341 oop_Relocation *r = iter.oop_reloc(); | |
342 if (oop_addr == NULL) { | |
343 oop_addr = r->oop_addr(); | |
344 *oop_addr = (oop)x; | |
345 } else { | |
346 assert(oop_addr == r->oop_addr(), "must be only one set-oop here"); | |
347 } | |
348 } | |
349 } | |
350 } | |
351 } | |
352 | |
353 | |
354 // Code for unit testing implementation of NativeMovConstReg class | |
355 void NativeMovConstReg::test() { | |
356 #ifdef ASSERT | |
357 ResourceMark rm; | |
358 CodeBuffer cb("test", 100, 100); | |
359 MacroAssembler* a = new MacroAssembler(&cb); | |
360 NativeMovConstReg* nm; | |
361 uint idx; | |
362 int offsets[] = { | |
363 0x0, | |
364 0x7fffffff, | |
365 0x80000000, | |
366 0xffffffff, | |
367 0x20, | |
368 4096, | |
369 4097, | |
370 }; | |
371 | |
372 VM_Version::allow_all(); | |
373 | |
727 | 374 AddressLiteral al1(0xaaaabbbb, relocInfo::external_word_type); |
375 a->sethi(al1, I3); | |
376 a->add(I3, al1.low10(), I3); | |
377 AddressLiteral al2(0xccccdddd, relocInfo::external_word_type); | |
378 a->sethi(al2, O2); | |
379 a->add(O2, al2.low10(), O2); | |
0 | 380 |
1748 | 381 nm = nativeMovConstReg_at( cb.insts_begin() ); |
0 | 382 nm->print(); |
383 | |
384 nm = nativeMovConstReg_at( nm->next_instruction_address() ); | |
385 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
386 nm->set_data( offsets[idx] ); | |
387 assert(nm->data() == offsets[idx], "check unit test"); | |
388 } | |
389 nm->print(); | |
390 | |
391 VM_Version::revert(); | |
392 #endif | |
393 } | |
394 // End code for unit testing implementation of NativeMovConstReg class | |
395 | |
396 //------------------------------------------------------------------- | |
397 | |
398 void NativeMovConstRegPatching::verify() { | |
399 NativeInstruction::verify(); | |
400 // Make sure code pattern is sethi/nop/add. | |
401 int i0 = long_at(sethi_offset); | |
402 int i1 = long_at(nop_offset); | |
403 int i2 = long_at(add_offset); | |
404 assert((int)nop_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
405 | |
406 // Verify the pattern "sethi %hi22(imm), reg; nop; add reg, %lo10(imm), reg" | |
407 // The casual reader should note that on Sparc a nop is a special case if sethi | |
408 // in which the destination register is %g0. | |
409 Register rd0 = inv_rd(i0); | |
410 Register rd1 = inv_rd(i1); | |
411 if (!(is_op2(i0, Assembler::sethi_op2) && rd0 != G0 && | |
412 is_op2(i1, Assembler::sethi_op2) && rd1 == G0 && // nop is a special case of sethi | |
413 is_op3(i2, Assembler::add_op3, Assembler::arith_op) && | |
414 inv_immed(i2) && (unsigned)get_simm13(i2) < (1 << 10) && | |
415 rd0 == inv_rs1(i2) && rd0 == inv_rd(i2))) { | |
416 fatal("not a set_oop"); | |
417 } | |
418 } | |
419 | |
420 | |
421 void NativeMovConstRegPatching::print() { | |
422 tty->print_cr(INTPTR_FORMAT ": mov reg, " INTPTR_FORMAT, instruction_address(), data()); | |
423 } | |
424 | |
425 | |
426 int NativeMovConstRegPatching::data() const { | |
427 #ifdef _LP64 | |
428 return data64(addr_at(sethi_offset), long_at(add_offset)); | |
429 #else | |
430 return data32(long_at(sethi_offset), long_at(add_offset)); | |
431 #endif | |
432 } | |
433 | |
434 | |
435 void NativeMovConstRegPatching::set_data(int x) { | |
436 #ifdef _LP64 | |
437 set_data64_sethi(addr_at(sethi_offset), x); | |
438 #else | |
439 set_long_at(sethi_offset, set_data32_sethi(long_at(sethi_offset), x)); | |
440 #endif | |
441 set_long_at(add_offset, set_data32_simm13(long_at(add_offset), x)); | |
442 | |
443 // also store the value into an oop_Relocation cell, if any | |
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444 CodeBlob* cb = CodeCache::find_blob(instruction_address()); |
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445 nmethod* nm = cb ? cb->as_nmethod_or_null() : NULL; |
0 | 446 if (nm != NULL) { |
447 RelocIterator iter(nm, instruction_address(), next_instruction_address()); | |
448 oop* oop_addr = NULL; | |
449 while (iter.next()) { | |
450 if (iter.type() == relocInfo::oop_type) { | |
451 oop_Relocation *r = iter.oop_reloc(); | |
452 if (oop_addr == NULL) { | |
453 oop_addr = r->oop_addr(); | |
454 *oop_addr = (oop)x; | |
455 } else { | |
456 assert(oop_addr == r->oop_addr(), "must be only one set-oop here"); | |
457 } | |
458 } | |
459 } | |
460 } | |
461 } | |
462 | |
463 | |
464 // Code for unit testing implementation of NativeMovConstRegPatching class | |
465 void NativeMovConstRegPatching::test() { | |
466 #ifdef ASSERT | |
467 ResourceMark rm; | |
468 CodeBuffer cb("test", 100, 100); | |
469 MacroAssembler* a = new MacroAssembler(&cb); | |
470 NativeMovConstRegPatching* nm; | |
471 uint idx; | |
472 int offsets[] = { | |
473 0x0, | |
474 0x7fffffff, | |
475 0x80000000, | |
476 0xffffffff, | |
477 0x20, | |
478 4096, | |
479 4097, | |
480 }; | |
481 | |
482 VM_Version::allow_all(); | |
483 | |
727 | 484 AddressLiteral al1(0xaaaabbbb, relocInfo::external_word_type); |
485 a->sethi(al1, I3); | |
0 | 486 a->nop(); |
727 | 487 a->add(I3, al1.low10(), I3); |
488 AddressLiteral al2(0xccccdddd, relocInfo::external_word_type); | |
489 a->sethi(al2, O2); | |
0 | 490 a->nop(); |
727 | 491 a->add(O2, al2.low10(), O2); |
0 | 492 |
1748 | 493 nm = nativeMovConstRegPatching_at( cb.insts_begin() ); |
0 | 494 nm->print(); |
495 | |
496 nm = nativeMovConstRegPatching_at( nm->next_instruction_address() ); | |
497 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
498 nm->set_data( offsets[idx] ); | |
499 assert(nm->data() == offsets[idx], "check unit test"); | |
500 } | |
501 nm->print(); | |
502 | |
503 VM_Version::revert(); | |
504 #endif // ASSERT | |
505 } | |
506 // End code for unit testing implementation of NativeMovConstRegPatching class | |
507 | |
508 | |
509 //------------------------------------------------------------------- | |
510 | |
511 | |
512 void NativeMovRegMem::copy_instruction_to(address new_instruction_address) { | |
513 Untested("copy_instruction_to"); | |
514 int instruction_size = next_instruction_address() - instruction_address(); | |
515 for (int i = 0; i < instruction_size; i += BytesPerInstWord) { | |
516 *(int*)(new_instruction_address + i) = *(int*)(address(this) + i); | |
517 } | |
518 } | |
519 | |
520 | |
521 void NativeMovRegMem::verify() { | |
522 NativeInstruction::verify(); | |
523 // make sure code pattern is actually a "ld" or "st" of some sort. | |
524 int i0 = long_at(0); | |
525 int op3 = inv_op3(i0); | |
526 | |
527 assert((int)add_offset == NativeMovConstReg::add_offset, "sethi size ok"); | |
528 | |
529 if (!(is_op(i0, Assembler::ldst_op) && | |
530 inv_immed(i0) && | |
531 0 != (op3 < op3_ldst_int_limit | |
532 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
533 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf)))) | |
534 { | |
535 int i1 = long_at(ldst_offset); | |
536 Register rd = inv_rd(i0); | |
537 | |
538 op3 = inv_op3(i1); | |
539 if (!is_op(i1, Assembler::ldst_op) && rd == inv_rs2(i1) && | |
540 0 != (op3 < op3_ldst_int_limit | |
541 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
542 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))) { | |
543 fatal("not a ld* or st* op"); | |
544 } | |
545 } | |
546 } | |
547 | |
548 | |
549 void NativeMovRegMem::print() { | |
550 if (is_immediate()) { | |
551 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + %x]", instruction_address(), offset()); | |
552 } else { | |
553 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + reg]", instruction_address()); | |
554 } | |
555 } | |
556 | |
557 | |
558 // Code for unit testing implementation of NativeMovRegMem class | |
559 void NativeMovRegMem::test() { | |
560 #ifdef ASSERT | |
561 ResourceMark rm; | |
562 CodeBuffer cb("test", 1000, 1000); | |
563 MacroAssembler* a = new MacroAssembler(&cb); | |
564 NativeMovRegMem* nm; | |
565 uint idx = 0; | |
566 uint idx1; | |
567 int offsets[] = { | |
568 0x0, | |
569 0xffffffff, | |
570 0x7fffffff, | |
571 0x80000000, | |
572 4096, | |
573 4097, | |
574 0x20, | |
575 0x4000, | |
576 }; | |
577 | |
578 VM_Version::allow_all(); | |
579 | |
727 | 580 AddressLiteral al1(0xffffffff, relocInfo::external_word_type); |
581 AddressLiteral al2(0xaaaabbbb, relocInfo::external_word_type); | |
582 a->ldsw( G5, al1.low10(), G4 ); idx++; | |
583 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 584 a->ldsw( G5, I3, G4 ); idx++; |
727 | 585 a->ldsb( G5, al1.low10(), G4 ); idx++; |
586 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 587 a->ldsb( G5, I3, G4 ); idx++; |
727 | 588 a->ldsh( G5, al1.low10(), G4 ); idx++; |
589 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 590 a->ldsh( G5, I3, G4 ); idx++; |
727 | 591 a->lduw( G5, al1.low10(), G4 ); idx++; |
592 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 593 a->lduw( G5, I3, G4 ); idx++; |
727 | 594 a->ldub( G5, al1.low10(), G4 ); idx++; |
595 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 596 a->ldub( G5, I3, G4 ); idx++; |
727 | 597 a->lduh( G5, al1.low10(), G4 ); idx++; |
598 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 599 a->lduh( G5, I3, G4 ); idx++; |
727 | 600 a->ldx( G5, al1.low10(), G4 ); idx++; |
601 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 602 a->ldx( G5, I3, G4 ); idx++; |
727 | 603 a->ldd( G5, al1.low10(), G4 ); idx++; |
604 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 605 a->ldd( G5, I3, G4 ); idx++; |
606 a->ldf( FloatRegisterImpl::D, O2, -1, F14 ); idx++; | |
727 | 607 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); |
0 | 608 a->ldf( FloatRegisterImpl::S, O0, I3, F15 ); idx++; |
609 | |
727 | 610 a->stw( G5, G4, al1.low10() ); idx++; |
611 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 612 a->stw( G5, G4, I3 ); idx++; |
727 | 613 a->stb( G5, G4, al1.low10() ); idx++; |
614 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 615 a->stb( G5, G4, I3 ); idx++; |
727 | 616 a->sth( G5, G4, al1.low10() ); idx++; |
617 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 618 a->sth( G5, G4, I3 ); idx++; |
727 | 619 a->stx( G5, G4, al1.low10() ); idx++; |
620 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 621 a->stx( G5, G4, I3 ); idx++; |
727 | 622 a->std( G5, G4, al1.low10() ); idx++; |
623 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); | |
0 | 624 a->std( G5, G4, I3 ); idx++; |
625 a->stf( FloatRegisterImpl::S, F18, O2, -1 ); idx++; | |
727 | 626 a->sethi(al2, I3); a->add(I3, al2.low10(), I3); |
0 | 627 a->stf( FloatRegisterImpl::S, F15, O0, I3 ); idx++; |
628 | |
1748 | 629 nm = nativeMovRegMem_at( cb.insts_begin() ); |
0 | 630 nm->print(); |
631 nm->set_offset( low10(0) ); | |
632 nm->print(); | |
633 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
634 nm->print(); | |
635 | |
636 while (--idx) { | |
637 nm = nativeMovRegMem_at( nm->next_instruction_address() ); | |
638 nm->print(); | |
639 for (idx1 = 0; idx1 < ARRAY_SIZE(offsets); idx1++) { | |
640 nm->set_offset( nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1] ); | |
641 assert(nm->offset() == (nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1]), | |
642 "check unit test"); | |
643 nm->print(); | |
644 } | |
645 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
646 nm->print(); | |
647 } | |
648 | |
649 VM_Version::revert(); | |
650 #endif // ASSERT | |
651 } | |
652 | |
653 // End code for unit testing implementation of NativeMovRegMem class | |
654 | |
655 //-------------------------------------------------------------------------------- | |
656 | |
657 | |
658 void NativeMovRegMemPatching::copy_instruction_to(address new_instruction_address) { | |
659 Untested("copy_instruction_to"); | |
660 int instruction_size = next_instruction_address() - instruction_address(); | |
661 for (int i = 0; i < instruction_size; i += wordSize) { | |
662 *(long*)(new_instruction_address + i) = *(long*)(address(this) + i); | |
663 } | |
664 } | |
665 | |
666 | |
667 void NativeMovRegMemPatching::verify() { | |
668 NativeInstruction::verify(); | |
669 // make sure code pattern is actually a "ld" or "st" of some sort. | |
670 int i0 = long_at(0); | |
671 int op3 = inv_op3(i0); | |
672 | |
673 assert((int)nop_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
674 | |
675 if (!(is_op(i0, Assembler::ldst_op) && | |
676 inv_immed(i0) && | |
677 0 != (op3 < op3_ldst_int_limit | |
678 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
679 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf)))) { | |
680 int i1 = long_at(ldst_offset); | |
681 Register rd = inv_rd(i0); | |
682 | |
683 op3 = inv_op3(i1); | |
684 if (!is_op(i1, Assembler::ldst_op) && rd == inv_rs2(i1) && | |
685 0 != (op3 < op3_ldst_int_limit | |
686 ? (1 << op3 ) & (op3_mask_ld | op3_mask_st) | |
687 : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))) { | |
688 fatal("not a ld* or st* op"); | |
689 } | |
690 } | |
691 } | |
692 | |
693 | |
694 void NativeMovRegMemPatching::print() { | |
695 if (is_immediate()) { | |
696 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + %x]", instruction_address(), offset()); | |
697 } else { | |
698 tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + reg]", instruction_address()); | |
699 } | |
700 } | |
701 | |
702 | |
703 // Code for unit testing implementation of NativeMovRegMemPatching class | |
704 void NativeMovRegMemPatching::test() { | |
705 #ifdef ASSERT | |
706 ResourceMark rm; | |
707 CodeBuffer cb("test", 1000, 1000); | |
708 MacroAssembler* a = new MacroAssembler(&cb); | |
709 NativeMovRegMemPatching* nm; | |
710 uint idx = 0; | |
711 uint idx1; | |
712 int offsets[] = { | |
713 0x0, | |
714 0xffffffff, | |
715 0x7fffffff, | |
716 0x80000000, | |
717 4096, | |
718 4097, | |
719 0x20, | |
720 0x4000, | |
721 }; | |
722 | |
723 VM_Version::allow_all(); | |
724 | |
727 | 725 AddressLiteral al(0xffffffff, relocInfo::external_word_type); |
726 a->ldsw( G5, al.low10(), G4); idx++; | |
727 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 728 a->ldsw( G5, I3, G4 ); idx++; |
727 | 729 a->ldsb( G5, al.low10(), G4); idx++; |
730 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 731 a->ldsb( G5, I3, G4 ); idx++; |
727 | 732 a->ldsh( G5, al.low10(), G4); idx++; |
733 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 734 a->ldsh( G5, I3, G4 ); idx++; |
727 | 735 a->lduw( G5, al.low10(), G4); idx++; |
736 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 737 a->lduw( G5, I3, G4 ); idx++; |
727 | 738 a->ldub( G5, al.low10(), G4); idx++; |
739 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 740 a->ldub( G5, I3, G4 ); idx++; |
727 | 741 a->lduh( G5, al.low10(), G4); idx++; |
742 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 743 a->lduh( G5, I3, G4 ); idx++; |
727 | 744 a->ldx( G5, al.low10(), G4); idx++; |
745 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
746 a->ldx( G5, I3, G4 ); idx++; | |
747 a->ldd( G5, al.low10(), G4); idx++; | |
748 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
749 a->ldd( G5, I3, G4 ); idx++; | |
750 a->ldf( FloatRegisterImpl::D, O2, -1, F14 ); idx++; | |
751 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
752 a->ldf( FloatRegisterImpl::S, O0, I3, F15 ); idx++; | |
0 | 753 |
727 | 754 a->stw( G5, G4, al.low10()); idx++; |
755 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 756 a->stw( G5, G4, I3 ); idx++; |
727 | 757 a->stb( G5, G4, al.low10()); idx++; |
758 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 759 a->stb( G5, G4, I3 ); idx++; |
727 | 760 a->sth( G5, G4, al.low10()); idx++; |
761 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 762 a->sth( G5, G4, I3 ); idx++; |
727 | 763 a->stx( G5, G4, al.low10()); idx++; |
764 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 765 a->stx( G5, G4, I3 ); idx++; |
727 | 766 a->std( G5, G4, al.low10()); idx++; |
767 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); | |
0 | 768 a->std( G5, G4, I3 ); idx++; |
769 a->stf( FloatRegisterImpl::S, F18, O2, -1 ); idx++; | |
727 | 770 a->sethi(al, I3); a->nop(); a->add(I3, al.low10(), I3); |
0 | 771 a->stf( FloatRegisterImpl::S, F15, O0, I3 ); idx++; |
772 | |
1748 | 773 nm = nativeMovRegMemPatching_at( cb.insts_begin() ); |
0 | 774 nm->print(); |
775 nm->set_offset( low10(0) ); | |
776 nm->print(); | |
777 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
778 nm->print(); | |
779 | |
780 while (--idx) { | |
781 nm = nativeMovRegMemPatching_at( nm->next_instruction_address() ); | |
782 nm->print(); | |
783 for (idx1 = 0; idx1 < ARRAY_SIZE(offsets); idx1++) { | |
784 nm->set_offset( nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1] ); | |
785 assert(nm->offset() == (nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1]), | |
786 "check unit test"); | |
787 nm->print(); | |
788 } | |
789 nm->add_offset_in_bytes( low10(0xbb) * wordSize ); | |
790 nm->print(); | |
791 } | |
792 | |
793 VM_Version::revert(); | |
794 #endif // ASSERT | |
795 } | |
796 // End code for unit testing implementation of NativeMovRegMemPatching class | |
797 | |
798 | |
799 //-------------------------------------------------------------------------------- | |
800 | |
801 | |
802 void NativeJump::verify() { | |
803 NativeInstruction::verify(); | |
804 int i0 = long_at(sethi_offset); | |
805 int i1 = long_at(jmpl_offset); | |
806 assert((int)jmpl_offset == (int)NativeMovConstReg::add_offset, "sethi size ok"); | |
807 // verify the pattern "sethi %hi22(imm), treg ; jmpl treg, %lo10(imm), lreg" | |
808 Register rd = inv_rd(i0); | |
809 #ifndef _LP64 | |
810 if (!(is_op2(i0, Assembler::sethi_op2) && rd != G0 && | |
811 (is_op3(i1, Assembler::jmpl_op3, Assembler::arith_op) || | |
812 (TraceJumps && is_op3(i1, Assembler::add_op3, Assembler::arith_op))) && | |
813 inv_immed(i1) && (unsigned)get_simm13(i1) < (1 << 10) && | |
814 rd == inv_rs1(i1))) { | |
815 fatal("not a jump_to instruction"); | |
816 } | |
817 #else | |
818 // In LP64, the jump instruction location varies for non relocatable | |
819 // jumps, for example is could be sethi, xor, jmp instead of the | |
820 // 7 instructions for sethi. So let's check sethi only. | |
821 if (!is_op2(i0, Assembler::sethi_op2) && rd != G0 ) { | |
822 fatal("not a jump_to instruction"); | |
823 } | |
824 #endif | |
825 } | |
826 | |
827 | |
828 void NativeJump::print() { | |
829 tty->print_cr(INTPTR_FORMAT ": jmpl reg, " INTPTR_FORMAT, instruction_address(), jump_destination()); | |
830 } | |
831 | |
832 | |
833 // Code for unit testing implementation of NativeJump class | |
834 void NativeJump::test() { | |
835 #ifdef ASSERT | |
836 ResourceMark rm; | |
837 CodeBuffer cb("test", 100, 100); | |
838 MacroAssembler* a = new MacroAssembler(&cb); | |
839 NativeJump* nj; | |
840 uint idx; | |
841 int offsets[] = { | |
842 0x0, | |
843 0xffffffff, | |
844 0x7fffffff, | |
845 0x80000000, | |
846 4096, | |
847 4097, | |
848 0x20, | |
849 0x4000, | |
850 }; | |
851 | |
852 VM_Version::allow_all(); | |
853 | |
727 | 854 AddressLiteral al(0x7fffbbbb, relocInfo::external_word_type); |
855 a->sethi(al, I3); | |
856 a->jmpl(I3, al.low10(), G0, RelocationHolder::none); | |
0 | 857 a->delayed()->nop(); |
727 | 858 a->sethi(al, I3); |
859 a->jmpl(I3, al.low10(), L3, RelocationHolder::none); | |
0 | 860 a->delayed()->nop(); |
861 | |
1748 | 862 nj = nativeJump_at( cb.insts_begin() ); |
0 | 863 nj->print(); |
864 | |
865 nj = nativeJump_at( nj->next_instruction_address() ); | |
866 for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) { | |
867 nj->set_jump_destination( nj->instruction_address() + offsets[idx] ); | |
868 assert(nj->jump_destination() == (nj->instruction_address() + offsets[idx]), "check unit test"); | |
869 nj->print(); | |
870 } | |
871 | |
872 VM_Version::revert(); | |
873 #endif // ASSERT | |
874 } | |
875 // End code for unit testing implementation of NativeJump class | |
876 | |
877 | |
878 void NativeJump::insert(address code_pos, address entry) { | |
879 Unimplemented(); | |
880 } | |
881 | |
882 // MT safe inserting of a jump over an unknown instruction sequence (used by nmethod::makeZombie) | |
883 // The problem: jump_to <dest> is a 3-word instruction (including its delay slot). | |
884 // Atomic write can be only with 1 word. | |
885 void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) { | |
886 // Here's one way to do it: Pre-allocate a three-word jump sequence somewhere | |
887 // in the header of the nmethod, within a short branch's span of the patch point. | |
888 // Set up the jump sequence using NativeJump::insert, and then use an annulled | |
889 // unconditional branch at the target site (an atomic 1-word update). | |
890 // Limitations: You can only patch nmethods, with any given nmethod patched at | |
891 // most once, and the patch must be in the nmethod's header. | |
892 // It's messy, but you can ask the CodeCache for the nmethod containing the | |
893 // target address. | |
894 | |
895 // %%%%% For now, do something MT-stupid: | |
896 ResourceMark rm; | |
897 int code_size = 1 * BytesPerInstWord; | |
898 CodeBuffer cb(verified_entry, code_size + 1); | |
899 MacroAssembler* a = new MacroAssembler(&cb); | |
900 if (VM_Version::v9_instructions_work()) { | |
901 a->ldsw(G0, 0, O7); // "ld" must agree with code in the signal handler | |
902 } else { | |
903 a->lduw(G0, 0, O7); // "ld" must agree with code in the signal handler | |
904 } | |
905 ICache::invalidate_range(verified_entry, code_size); | |
906 } | |
907 | |
908 | |
909 void NativeIllegalInstruction::insert(address code_pos) { | |
910 NativeIllegalInstruction* nii = (NativeIllegalInstruction*) nativeInstruction_at(code_pos); | |
911 nii->set_long_at(0, illegal_instruction()); | |
912 } | |
913 | |
914 static int illegal_instruction_bits = 0; | |
915 | |
916 int NativeInstruction::illegal_instruction() { | |
917 if (illegal_instruction_bits == 0) { | |
918 ResourceMark rm; | |
919 char buf[40]; | |
920 CodeBuffer cbuf((address)&buf[0], 20); | |
921 MacroAssembler* a = new MacroAssembler(&cbuf); | |
922 address ia = a->pc(); | |
923 a->trap(ST_RESERVED_FOR_USER_0 + 1); | |
924 int bits = *(int*)ia; | |
925 assert(is_op3(bits, Assembler::trap_op3, Assembler::arith_op), "bad instruction"); | |
926 illegal_instruction_bits = bits; | |
927 assert(illegal_instruction_bits != 0, "oops"); | |
928 } | |
929 return illegal_instruction_bits; | |
930 } | |
931 | |
932 static int ic_miss_trap_bits = 0; | |
933 | |
934 bool NativeInstruction::is_ic_miss_trap() { | |
935 if (ic_miss_trap_bits == 0) { | |
936 ResourceMark rm; | |
937 char buf[40]; | |
938 CodeBuffer cbuf((address)&buf[0], 20); | |
939 MacroAssembler* a = new MacroAssembler(&cbuf); | |
940 address ia = a->pc(); | |
941 a->trap(Assembler::notEqual, Assembler::ptr_cc, G0, ST_RESERVED_FOR_USER_0 + 2); | |
942 int bits = *(int*)ia; | |
943 assert(is_op3(bits, Assembler::trap_op3, Assembler::arith_op), "bad instruction"); | |
944 ic_miss_trap_bits = bits; | |
945 assert(ic_miss_trap_bits != 0, "oops"); | |
946 } | |
947 return long_at(0) == ic_miss_trap_bits; | |
948 } | |
949 | |
950 | |
951 bool NativeInstruction::is_illegal() { | |
952 if (illegal_instruction_bits == 0) { | |
953 return false; | |
954 } | |
955 return long_at(0) == illegal_instruction_bits; | |
956 } | |
957 | |
958 | |
959 void NativeGeneralJump::verify() { | |
960 assert(((NativeInstruction *)this)->is_jump() || | |
961 ((NativeInstruction *)this)->is_cond_jump(), "not a general jump instruction"); | |
962 } | |
963 | |
964 | |
965 void NativeGeneralJump::insert_unconditional(address code_pos, address entry) { | |
966 Assembler::Condition condition = Assembler::always; | |
967 int x = Assembler::op2(Assembler::br_op2) | Assembler::annul(false) | | |
968 Assembler::cond(condition) | Assembler::wdisp((intptr_t)entry, (intptr_t)code_pos, 22); | |
969 NativeGeneralJump* ni = (NativeGeneralJump*) nativeInstruction_at(code_pos); | |
970 ni->set_long_at(0, x); | |
971 } | |
972 | |
973 | |
974 // MT-safe patching of a jmp instruction (and following word). | |
975 // First patches the second word, and then atomicly replaces | |
976 // the first word with the first new instruction word. | |
977 // Other processors might briefly see the old first word | |
978 // followed by the new second word. This is OK if the old | |
979 // second word is harmless, and the new second word may be | |
980 // harmlessly executed in the delay slot of the call. | |
981 void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) { | |
982 assert(Patching_lock->is_locked() || | |
983 SafepointSynchronize::is_at_safepoint(), "concurrent code patching"); | |
984 assert (instr_addr != NULL, "illegal address for code patching"); | |
985 NativeGeneralJump* h_jump = nativeGeneralJump_at (instr_addr); // checking that it is a call | |
986 assert(NativeGeneralJump::instruction_size == 8, "wrong instruction size; must be 8"); | |
987 int i0 = ((int*)code_buffer)[0]; | |
988 int i1 = ((int*)code_buffer)[1]; | |
989 int* contention_addr = (int*) h_jump->addr_at(1*BytesPerInstWord); | |
990 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
991 *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(), | |
992 "must not interfere with original call"); | |
993 // The set_long_at calls do the ICacheInvalidate so we just need to do them in reverse order | |
994 h_jump->set_long_at(1*BytesPerInstWord, i1); | |
995 h_jump->set_long_at(0*BytesPerInstWord, i0); | |
996 // NOTE: It is possible that another thread T will execute | |
997 // only the second patched word. | |
998 // In other words, since the original instruction is this | |
999 // jmp patching_stub; nop (NativeGeneralJump) | |
1000 // and the new sequence from the buffer is this: | |
1001 // sethi %hi(K), %r; add %r, %lo(K), %r (NativeMovConstReg) | |
1002 // what T will execute is this: | |
1003 // jmp patching_stub; add %r, %lo(K), %r | |
1004 // thereby putting garbage into %r before calling the patching stub. | |
1005 // This is OK, because the patching stub ignores the value of %r. | |
1006 | |
1007 // Make sure the first-patched instruction, which may co-exist | |
1008 // briefly with the call, will do something harmless. | |
1009 assert(inv_op(*contention_addr) == Assembler::arith_op || | |
1010 *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(), | |
1011 "must not interfere with original call"); | |
1012 } |