1 /*
2 * Copyright (c) 1999, 2020, 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 "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "c1/c1_CodeStubs.hpp"
29 #include "c1/c1_FrameMap.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_MacroAssembler.hpp"
32 #include "c1/c1_Runtime1.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "nativeInst_aarch64.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "vmreg_aarch64.inline.hpp"
37
38
39 #define __ ce->masm()->
40
41 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
42 __ bind(_entry);
43 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
44 __ adr(rscratch1, safepoint_pc);
45 __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
46
47 assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
48 "polling page return stub not created yet");
49 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
50
51 __ far_jump(RuntimeAddress(stub));
52 }
53
54 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
55 __ bind(_entry);
56 Metadata *m = _method->as_constant_ptr()->as_metadata();
57 __ mov_metadata(rscratch1, m);
58 ce->store_parameter(rscratch1, 1);
59 ce->store_parameter(_bci, 0);
60 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
61 ce->add_call_info_here(_info);
62 ce->verify_oop_map(_info);
63 __ b(_continuation);
64 }
65
66 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
67 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
68 assert(info != NULL, "must have info");
69 _info = new CodeEmitInfo(info);
70 }
71
72 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
73 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
74 assert(info != NULL, "must have info");
75 _info = new CodeEmitInfo(info);
76 }
77
78 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
79 __ bind(_entry);
80 if (_info->deoptimize_on_exception()) {
81 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
82 __ far_call(RuntimeAddress(a));
83 ce->add_call_info_here(_info);
84 ce->verify_oop_map(_info);
85 debug_only(__ should_not_reach_here());
86 return;
87 }
88
89 if (_index->is_cpu_register()) {
90 __ mov(rscratch1, _index->as_register());
91 } else {
92 __ mov(rscratch1, _index->as_jint());
93 }
94 Runtime1::StubID stub_id;
95 if (_throw_index_out_of_bounds_exception) {
96 stub_id = Runtime1::throw_index_exception_id;
97 } else {
98 assert(_array != NULL, "sanity");
99 __ mov(rscratch2, _array->as_pointer_register());
100 stub_id = Runtime1::throw_range_check_failed_id;
101 }
102 __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
103 __ blr(lr);
104 ce->add_call_info_here(_info);
105 ce->verify_oop_map(_info);
106 debug_only(__ should_not_reach_here());
107 }
108
109 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
110 _info = new CodeEmitInfo(info);
111 }
112
113 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
114 __ bind(_entry);
115 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
116 __ far_call(RuntimeAddress(a));
117 ce->add_call_info_here(_info);
118 ce->verify_oop_map(_info);
119 debug_only(__ should_not_reach_here());
120 }
121
122 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
123 if (_offset != -1) {
124 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
125 }
126 __ bind(_entry);
127 __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
128 ce->add_call_info_here(_info);
129 ce->verify_oop_map(_info);
130 #ifdef ASSERT
131 __ should_not_reach_here();
132 #endif
133 }
134
135
136
137 // Implementation of NewInstanceStub
138
139 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
140 _result = result;
141 _klass = klass;
142 _klass_reg = klass_reg;
143 _info = new CodeEmitInfo(info);
144 assert(stub_id == Runtime1::new_instance_id ||
145 stub_id == Runtime1::fast_new_instance_id ||
146 stub_id == Runtime1::fast_new_instance_init_check_id,
147 "need new_instance id");
148 _stub_id = stub_id;
149 }
150
151
152
153 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
154 assert(__ rsp_offset() == 0, "frame size should be fixed");
155 __ bind(_entry);
156 __ mov(r3, _klass_reg->as_register());
157 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
158 ce->add_call_info_here(_info);
159 ce->verify_oop_map(_info);
160 assert(_result->as_register() == r0, "result must in r0,");
161 __ b(_continuation);
162 }
163
164
165 // Implementation of NewTypeArrayStub
166
167 // Implementation of NewTypeArrayStub
168
169 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
170 _klass_reg = klass_reg;
171 _length = length;
172 _result = result;
173 _info = new CodeEmitInfo(info);
174 }
175
176
177 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
178 assert(__ rsp_offset() == 0, "frame size should be fixed");
179 __ bind(_entry);
180 assert(_length->as_register() == r19, "length must in r19,");
181 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
182 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
183 ce->add_call_info_here(_info);
184 ce->verify_oop_map(_info);
185 assert(_result->as_register() == r0, "result must in r0");
186 __ b(_continuation);
187 }
188
189
190 // Implementation of NewObjectArrayStub
191
192 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
193 _klass_reg = klass_reg;
194 _result = result;
195 _length = length;
196 _info = new CodeEmitInfo(info);
197 }
198
199
200 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
201 assert(__ rsp_offset() == 0, "frame size should be fixed");
202 __ bind(_entry);
203 assert(_length->as_register() == r19, "length must in r19,");
204 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
205 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
206 ce->add_call_info_here(_info);
207 ce->verify_oop_map(_info);
208 assert(_result->as_register() == r0, "result must in r0");
209 __ b(_continuation);
210 }
211 // Implementation of MonitorAccessStubs
212
213 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
214 : MonitorAccessStub(obj_reg, lock_reg)
215 {
216 _info = new CodeEmitInfo(info);
217 }
218
219
220 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
221 assert(__ rsp_offset() == 0, "frame size should be fixed");
222 __ bind(_entry);
223 ce->store_parameter(_obj_reg->as_register(), 1);
224 ce->store_parameter(_lock_reg->as_register(), 0);
225 Runtime1::StubID enter_id;
226 if (ce->compilation()->has_fpu_code()) {
227 enter_id = Runtime1::monitorenter_id;
228 } else {
229 enter_id = Runtime1::monitorenter_nofpu_id;
230 }
231 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
232 ce->add_call_info_here(_info);
233 ce->verify_oop_map(_info);
234 __ b(_continuation);
235 }
236
237
238 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
239 __ bind(_entry);
240 if (_compute_lock) {
241 // lock_reg was destroyed by fast unlocking attempt => recompute it
242 ce->monitor_address(_monitor_ix, _lock_reg);
243 }
244 ce->store_parameter(_lock_reg->as_register(), 0);
245 // note: non-blocking leaf routine => no call info needed
246 Runtime1::StubID exit_id;
247 if (ce->compilation()->has_fpu_code()) {
248 exit_id = Runtime1::monitorexit_id;
249 } else {
250 exit_id = Runtime1::monitorexit_nofpu_id;
251 }
252 __ adr(lr, _continuation);
253 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
254 }
255
256
257 // Implementation of patching:
258 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
259 // - Replace original code with a call to the stub
260 // At Runtime:
261 // - call to stub, jump to runtime
262 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
263 // - in runtime: after initializing class, restore original code, reexecute instruction
264
265 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
266
267 void PatchingStub::align_patch_site(MacroAssembler* masm) {
268 }
269
270 void PatchingStub::emit_code(LIR_Assembler* ce) {
271 assert(false, "AArch64 should not use C1 runtime patching");
272 }
273
274
275 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
276 __ bind(_entry);
277 ce->store_parameter(_trap_request, 0);
278 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
279 ce->add_call_info_here(_info);
280 DEBUG_ONLY(__ should_not_reach_here());
281 }
282
283
284 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
285 address a;
286 if (_info->deoptimize_on_exception()) {
287 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
288 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
289 } else {
290 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
291 }
292
293 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
294 __ bind(_entry);
295 __ far_call(RuntimeAddress(a));
296 ce->add_call_info_here(_info);
297 ce->verify_oop_map(_info);
298 debug_only(__ should_not_reach_here());
299 }
300
301
302 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
303 assert(__ rsp_offset() == 0, "frame size should be fixed");
304
305 __ bind(_entry);
306 // pass the object in a scratch register because all other registers
307 // must be preserved
308 if (_obj->is_cpu_register()) {
309 __ mov(rscratch1, _obj->as_register());
310 }
311 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
312 ce->add_call_info_here(_info);
313 debug_only(__ should_not_reach_here());
314 }
315
316
317 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
318 //---------------slow case: call to native-----------------
319 __ bind(_entry);
320 // Figure out where the args should go
321 // This should really convert the IntrinsicID to the Method* and signature
322 // but I don't know how to do that.
323 //
324 VMRegPair args[5];
325 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
326 SharedRuntime::java_calling_convention(signature, args, 5);
327
328 // push parameters
329 // (src, src_pos, dest, destPos, length)
330 Register r[5];
331 r[0] = src()->as_register();
332 r[1] = src_pos()->as_register();
333 r[2] = dst()->as_register();
334 r[3] = dst_pos()->as_register();
335 r[4] = length()->as_register();
336
337 // next registers will get stored on the stack
338 for (int i = 0; i < 5 ; i++ ) {
339 VMReg r_1 = args[i].first();
340 if (r_1->is_stack()) {
341 int st_off = r_1->reg2stack() * wordSize;
342 __ str (r[i], Address(sp, st_off));
343 } else {
344 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
345 }
346 }
347
348 ce->align_call(lir_static_call);
349
350 ce->emit_static_call_stub();
351 if (ce->compilation()->bailed_out()) {
352 return; // CodeCache is full
353 }
354 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
355 relocInfo::static_call_type);
356 address call = __ trampoline_call(resolve);
357 if (call == NULL) {
358 ce->bailout("trampoline stub overflow");
359 return;
360 }
361 ce->add_call_info_here(info());
362
363 #ifndef PRODUCT
364 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
365 __ incrementw(Address(rscratch2));
366 #endif
367
368 __ b(_continuation);
369 }
370
371 #undef __