1 /*
2 * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "asm/macroAssembler.inline.hpp"
27 #include "c1/c1_CodeStubs.hpp"
28 #include "c1/c1_FrameMap.hpp"
29 #include "c1/c1_LIRAssembler.hpp"
30 #include "c1/c1_MacroAssembler.hpp"
31 #include "c1/c1_Runtime1.hpp"
32 #include "classfile/javaClasses.hpp"
33 #include "nativeInst_aarch64.hpp"
34 #include "runtime/sharedRuntime.hpp"
35 #include "vmreg_aarch64.inline.hpp"
36
37
38 #define __ ce->masm()->
39
40 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
41 __ bind(_entry);
42 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
43 __ adr(rscratch1, safepoint_pc);
44 __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
45
46 assert(SharedRuntime::polling_page_return_handler_blob() != nullptr,
47 "polling page return stub not created yet");
48 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
49
50 __ far_jump(RuntimeAddress(stub));
51 }
52
53 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
54 __ bind(_entry);
55 Metadata *m = _method->as_constant_ptr()->as_metadata();
56 __ mov_metadata(rscratch1, m);
57 ce->store_parameter(rscratch1, 1);
58 ce->store_parameter(_bci, 0);
59 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::counter_overflow_id)));
60 ce->add_call_info_here(_info);
61 ce->verify_oop_map(_info);
62 __ b(_continuation);
63 }
64
65 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
66 __ bind(_entry);
67 if (_info->deoptimize_on_exception()) {
68 address a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
69 __ far_call(RuntimeAddress(a));
70 ce->add_call_info_here(_info);
71 ce->verify_oop_map(_info);
72 debug_only(__ should_not_reach_here());
73 return;
74 }
75
76 if (_index->is_cpu_register()) {
77 __ mov(rscratch1, _index->as_register());
78 } else {
79 __ mov(rscratch1, _index->as_jint());
80 }
81 C1StubId stub_id;
82 if (_throw_index_out_of_bounds_exception) {
83 stub_id = C1StubId::throw_index_exception_id;
84 } else {
85 assert(_array != LIR_Opr::nullOpr(), "sanity");
86 __ mov(rscratch2, _array->as_pointer_register());
87 stub_id = C1StubId::throw_range_check_failed_id;
88 }
89 __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
90 __ blr(lr);
91 ce->add_call_info_here(_info);
92 ce->verify_oop_map(_info);
93 debug_only(__ should_not_reach_here());
94 }
95
96 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
97 _info = new CodeEmitInfo(info);
98 }
99
100 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
101 __ bind(_entry);
102 address a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
103 __ far_call(RuntimeAddress(a));
104 ce->add_call_info_here(_info);
105 ce->verify_oop_map(_info);
106 debug_only(__ should_not_reach_here());
107 }
108
109 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
110 if (_offset != -1) {
111 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
112 }
113 __ bind(_entry);
114 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::throw_div0_exception_id)));
115 ce->add_call_info_here(_info);
116 ce->verify_oop_map(_info);
117 #ifdef ASSERT
118 __ should_not_reach_here();
119 #endif
120 }
121
122 // Implementation of LoadFlattenedArrayStub
123
124 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
125 _array = array;
126 _index = index;
127 _result = result;
128 _scratch_reg = FrameMap::r0_oop_opr;
129 _info = new CodeEmitInfo(info);
130 }
131
132 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
133 assert(__ rsp_offset() == 0, "frame size should be fixed");
134 __ bind(_entry);
135 ce->store_parameter(_array->as_register(), 1);
136 ce->store_parameter(_index->as_register(), 0);
137 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::load_flat_array_id)));
138 ce->add_call_info_here(_info);
139 ce->verify_oop_map(_info);
140 if (_result->as_register() != r0) {
141 __ mov(_result->as_register(), r0);
142 }
143 __ b(_continuation);
144 }
145
146
147 // Implementation of StoreFlattenedArrayStub
148
149 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) {
150 _array = array;
151 _index = index;
152 _value = value;
153 _scratch_reg = FrameMap::r0_oop_opr;
154 _info = new CodeEmitInfo(info);
155 }
156
157
158 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
159 assert(__ rsp_offset() == 0, "frame size should be fixed");
160 __ bind(_entry);
161 ce->store_parameter(_array->as_register(), 2);
162 ce->store_parameter(_index->as_register(), 1);
163 ce->store_parameter(_value->as_register(), 0);
164 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::store_flat_array_id)));
165 ce->add_call_info_here(_info);
166 ce->verify_oop_map(_info);
167 __ b(_continuation);
168 }
169
170 // Implementation of SubstitutabilityCheckStub
171 SubstitutabilityCheckStub::SubstitutabilityCheckStub(LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
172 _left = left;
173 _right = right;
174 _scratch_reg = FrameMap::r0_oop_opr;
175 _info = new CodeEmitInfo(info);
176 }
177
178 void SubstitutabilityCheckStub::emit_code(LIR_Assembler* ce) {
179 assert(__ rsp_offset() == 0, "frame size should be fixed");
180 __ bind(_entry);
181 ce->store_parameter(_left->as_register(), 1);
182 ce->store_parameter(_right->as_register(), 0);
183 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::substitutability_check_id)));
184 ce->add_call_info_here(_info);
185 ce->verify_oop_map(_info);
186 __ b(_continuation);
187 }
188
189
190 // Implementation of NewInstanceStub
191
192 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, C1StubId stub_id) {
193 _result = result;
194 _klass = klass;
195 _klass_reg = klass_reg;
196 _info = new CodeEmitInfo(info);
197 assert(stub_id == C1StubId::new_instance_id ||
198 stub_id == C1StubId::fast_new_instance_id ||
199 stub_id == C1StubId::fast_new_instance_init_check_id,
200 "need new_instance id");
201 _stub_id = stub_id;
202 }
203
204 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
205 assert(__ rsp_offset() == 0, "frame size should be fixed");
206 __ bind(_entry);
207 __ mov(r3, _klass_reg->as_register());
208 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
209 ce->add_call_info_here(_info);
210 ce->verify_oop_map(_info);
211 assert(_result->as_register() == r0, "result must in r0,");
212 __ b(_continuation);
213 }
214
215
216 // Implementation of NewTypeArrayStub
217
218 // Implementation of NewTypeArrayStub
219
220 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
221 _klass_reg = klass_reg;
222 _length = length;
223 _result = result;
224 _info = new CodeEmitInfo(info);
225 }
226
227
228 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
229 assert(__ rsp_offset() == 0, "frame size should be fixed");
230 __ bind(_entry);
231 assert(_length->as_register() == r19, "length must in r19,");
232 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
233 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_type_array_id)));
234 ce->add_call_info_here(_info);
235 ce->verify_oop_map(_info);
236 assert(_result->as_register() == r0, "result must in r0");
237 __ b(_continuation);
238 }
239
240
241 // Implementation of NewObjectArrayStub
242
243 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result,
244 CodeEmitInfo* info, bool is_null_free) {
245 _klass_reg = klass_reg;
246 _result = result;
247 _length = length;
248 _info = new CodeEmitInfo(info);
249 _is_null_free = is_null_free;
250 }
251
252
253 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
254 assert(__ rsp_offset() == 0, "frame size should be fixed");
255 __ bind(_entry);
256 assert(_length->as_register() == r19, "length must in r19,");
257 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
258
259 if (_is_null_free) {
260 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_null_free_array_id)));
261 } else {
262 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_object_array_id)));
263 }
264
265 ce->add_call_info_here(_info);
266 ce->verify_oop_map(_info);
267 assert(_result->as_register() == r0, "result must in r0");
268 __ b(_continuation);
269 }
270
271 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
272 assert(__ rsp_offset() == 0, "frame size should be fixed");
273 __ bind(_entry);
274 if (_throw_ie_stub != nullptr) {
275 // When we come here, _obj_reg has already been checked to be non-null.
276 __ ldr(rscratch1, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
277 __ mov(rscratch2, markWord::inline_type_pattern);
278 __ andr(rscratch1, rscratch1, rscratch2);
279
280 __ cmp(rscratch1, rscratch2);
281 __ br(Assembler::EQ, *_throw_ie_stub->entry());
282 }
283
284 ce->store_parameter(_obj_reg->as_register(), 1);
285 ce->store_parameter(_lock_reg->as_register(), 0);
286 C1StubId enter_id;
287 if (ce->compilation()->has_fpu_code()) {
288 enter_id = C1StubId::monitorenter_id;
289 } else {
290 enter_id = C1StubId::monitorenter_nofpu_id;
291 }
292 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
293 ce->add_call_info_here(_info);
294 ce->verify_oop_map(_info);
295 __ b(_continuation);
296 }
297
298
299 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
300 __ bind(_entry);
301 if (_compute_lock) {
302 // lock_reg was destroyed by fast unlocking attempt => recompute it
303 ce->monitor_address(_monitor_ix, _lock_reg);
304 }
305 ce->store_parameter(_lock_reg->as_register(), 0);
306 // note: non-blocking leaf routine => no call info needed
307 C1StubId exit_id;
308 if (ce->compilation()->has_fpu_code()) {
309 exit_id = C1StubId::monitorexit_id;
310 } else {
311 exit_id = C1StubId::monitorexit_nofpu_id;
312 }
313 __ adr(lr, _continuation);
314 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
315 }
316
317
318 // Implementation of patching:
319 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
320 // - Replace original code with a call to the stub
321 // At Runtime:
322 // - call to stub, jump to runtime
323 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
324 // - in runtime: after initializing class, restore original code, reexecute instruction
325
326 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
327
328 void PatchingStub::align_patch_site(MacroAssembler* masm) {
329 }
330
331 void PatchingStub::emit_code(LIR_Assembler* ce) {
332 assert(false, "AArch64 should not use C1 runtime patching");
333 }
334
335
336 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
337 __ bind(_entry);
338 ce->store_parameter(_trap_request, 0);
339 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::deoptimize_id)));
340 ce->add_call_info_here(_info);
341 DEBUG_ONLY(__ should_not_reach_here());
342 }
343
344
345 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
346 address a;
347 if (_info->deoptimize_on_exception()) {
348 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
349 a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
350 } else {
351 a = Runtime1::entry_for(C1StubId::throw_null_pointer_exception_id);
352 }
353
354 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
355 __ bind(_entry);
356 __ far_call(RuntimeAddress(a));
357 ce->add_call_info_here(_info);
358 ce->verify_oop_map(_info);
359 debug_only(__ should_not_reach_here());
360 }
361
362
363 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
364 assert(__ rsp_offset() == 0, "frame size should be fixed");
365
366 __ bind(_entry);
367 // pass the object in a scratch register because all other registers
368 // must be preserved
369 if (_obj->is_cpu_register()) {
370 __ mov(rscratch1, _obj->as_register());
371 }
372 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), rscratch2);
373 ce->add_call_info_here(_info);
374 debug_only(__ should_not_reach_here());
375 }
376
377
378 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
379 //---------------slow case: call to native-----------------
380 __ bind(_entry);
381 // Figure out where the args should go
382 // This should really convert the IntrinsicID to the Method* and signature
383 // but I don't know how to do that.
384 //
385 VMRegPair args[5];
386 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
387 SharedRuntime::java_calling_convention(signature, args, 5);
388
389 // push parameters
390 // (src, src_pos, dest, destPos, length)
391 Register r[5];
392 r[0] = src()->as_register();
393 r[1] = src_pos()->as_register();
394 r[2] = dst()->as_register();
395 r[3] = dst_pos()->as_register();
396 r[4] = length()->as_register();
397
398 // next registers will get stored on the stack
399 for (int i = 0; i < 5 ; i++ ) {
400 VMReg r_1 = args[i].first();
401 if (r_1->is_stack()) {
402 int st_off = r_1->reg2stack() * wordSize;
403 __ str (r[i], Address(sp, st_off));
404 } else {
405 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
406 }
407 }
408
409 ce->align_call(lir_static_call);
410
411 ce->emit_static_call_stub();
412 if (ce->compilation()->bailed_out()) {
413 return; // CodeCache is full
414 }
415 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
416 relocInfo::static_call_type);
417 address call = __ trampoline_call(resolve);
418 if (call == nullptr) {
419 ce->bailout("trampoline stub overflow");
420 return;
421 }
422 ce->add_call_info_here(info());
423
424 #ifndef PRODUCT
425 if (PrintC1Statistics) {
426 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
427 __ incrementw(Address(rscratch2));
428 }
429 #endif
430
431 __ b(_continuation);
432 }
433
434 #undef __