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
123
124 // Implementation of NewInstanceStub
125
126 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, C1StubId stub_id) {
127 _result = result;
128 _klass = klass;
129 _klass_reg = klass_reg;
130 _info = new CodeEmitInfo(info);
131 assert(stub_id == C1StubId::new_instance_id ||
132 stub_id == C1StubId::fast_new_instance_id ||
133 stub_id == C1StubId::fast_new_instance_init_check_id,
134 "need new_instance id");
135 _stub_id = stub_id;
136 }
137
138
139
140 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
141 assert(__ rsp_offset() == 0, "frame size should be fixed");
142 __ bind(_entry);
143 __ mov(r3, _klass_reg->as_register());
144 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
145 ce->add_call_info_here(_info);
146 ce->verify_oop_map(_info);
147 assert(_result->as_register() == r0, "result must in r0,");
148 __ b(_continuation);
149 }
150
151
152 // Implementation of NewTypeArrayStub
153
154 // Implementation of NewTypeArrayStub
155
156 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
157 _klass_reg = klass_reg;
158 _length = length;
159 _result = result;
160 _info = new CodeEmitInfo(info);
161 }
162
163
164 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
165 assert(__ rsp_offset() == 0, "frame size should be fixed");
166 __ bind(_entry);
167 assert(_length->as_register() == r19, "length must in r19,");
168 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
169 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_type_array_id)));
170 ce->add_call_info_here(_info);
171 ce->verify_oop_map(_info);
172 assert(_result->as_register() == r0, "result must in r0");
173 __ b(_continuation);
174 }
175
176
177 // Implementation of NewObjectArrayStub
178
179 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
180 _klass_reg = klass_reg;
181 _result = result;
182 _length = length;
183 _info = new CodeEmitInfo(info);
184 }
185
186
187 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
188 assert(__ rsp_offset() == 0, "frame size should be fixed");
189 __ bind(_entry);
190 assert(_length->as_register() == r19, "length must in r19,");
191 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
192 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::new_object_array_id)));
193 ce->add_call_info_here(_info);
194 ce->verify_oop_map(_info);
195 assert(_result->as_register() == r0, "result must in r0");
196 __ b(_continuation);
197 }
198
199 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
200 assert(__ rsp_offset() == 0, "frame size should be fixed");
201 __ bind(_entry);
202 ce->store_parameter(_obj_reg->as_register(), 1);
203 ce->store_parameter(_lock_reg->as_register(), 0);
204 C1StubId enter_id;
205 if (ce->compilation()->has_fpu_code()) {
206 enter_id = C1StubId::monitorenter_id;
207 } else {
208 enter_id = C1StubId::monitorenter_nofpu_id;
209 }
210 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
211 ce->add_call_info_here(_info);
212 ce->verify_oop_map(_info);
213 __ b(_continuation);
214 }
215
216
217 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
218 __ bind(_entry);
219 if (_compute_lock) {
220 // lock_reg was destroyed by fast unlocking attempt => recompute it
221 ce->monitor_address(_monitor_ix, _lock_reg);
222 }
223 ce->store_parameter(_lock_reg->as_register(), 0);
224 // note: non-blocking leaf routine => no call info needed
225 C1StubId exit_id;
226 if (ce->compilation()->has_fpu_code()) {
227 exit_id = C1StubId::monitorexit_id;
228 } else {
229 exit_id = C1StubId::monitorexit_nofpu_id;
230 }
231 __ adr(lr, _continuation);
232 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
233 }
234
235
236 // Implementation of patching:
237 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
238 // - Replace original code with a call to the stub
239 // At Runtime:
240 // - call to stub, jump to runtime
241 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
242 // - in runtime: after initializing class, restore original code, reexecute instruction
243
244 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
245
246 void PatchingStub::align_patch_site(MacroAssembler* masm) {
247 }
248
249 void PatchingStub::emit_code(LIR_Assembler* ce) {
250 assert(false, "AArch64 should not use C1 runtime patching");
251 }
252
253
254 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
255 __ bind(_entry);
256 ce->store_parameter(_trap_request, 0);
257 __ far_call(RuntimeAddress(Runtime1::entry_for(C1StubId::deoptimize_id)));
258 ce->add_call_info_here(_info);
259 DEBUG_ONLY(__ should_not_reach_here());
260 }
261
262
263 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
264 address a;
265 if (_info->deoptimize_on_exception()) {
266 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
267 a = Runtime1::entry_for(C1StubId::predicate_failed_trap_id);
268 } else {
269 a = Runtime1::entry_for(C1StubId::throw_null_pointer_exception_id);
270 }
271
272 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
273 __ bind(_entry);
274 __ far_call(RuntimeAddress(a));
275 ce->add_call_info_here(_info);
276 ce->verify_oop_map(_info);
277 debug_only(__ should_not_reach_here());
278 }
279
280
281 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
282 assert(__ rsp_offset() == 0, "frame size should be fixed");
283
284 __ bind(_entry);
285 // pass the object in a scratch register because all other registers
286 // must be preserved
287 if (_obj->is_cpu_register()) {
288 __ mov(rscratch1, _obj->as_register());
289 }
290 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), rscratch2);
291 ce->add_call_info_here(_info);
292 debug_only(__ should_not_reach_here());
293 }
294
295
296 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
297 //---------------slow case: call to native-----------------
298 __ bind(_entry);
299 // Figure out where the args should go
300 // This should really convert the IntrinsicID to the Method* and signature
301 // but I don't know how to do that.
302 //
303 VMRegPair args[5];
304 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
305 SharedRuntime::java_calling_convention(signature, args, 5);
306
307 // push parameters
308 // (src, src_pos, dest, destPos, length)
309 Register r[5];
310 r[0] = src()->as_register();
311 r[1] = src_pos()->as_register();
312 r[2] = dst()->as_register();
313 r[3] = dst_pos()->as_register();
314 r[4] = length()->as_register();
315
316 // next registers will get stored on the stack
317 for (int i = 0; i < 5 ; i++ ) {
318 VMReg r_1 = args[i].first();
319 if (r_1->is_stack()) {
320 int st_off = r_1->reg2stack() * wordSize;
321 __ str (r[i], Address(sp, st_off));
322 } else {
323 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
324 }
325 }
326
327 ce->align_call(lir_static_call);
328
329 ce->emit_static_call_stub();
330 if (ce->compilation()->bailed_out()) {
331 return; // CodeCache is full
332 }
333 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
334 relocInfo::static_call_type);
335 address call = __ trampoline_call(resolve);
336 if (call == nullptr) {
337 ce->bailout("trampoline stub overflow");
338 return;
339 }
340 ce->add_call_info_here(info());
341
342 #ifndef PRODUCT
343 if (PrintC1Statistics) {
344 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
345 __ incrementw(Address(rscratch2));
346 }
347 #endif
348
349 __ b(_continuation);
350 }
351
352 #undef __