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src/hotspot/cpu/aarch64/c2_CodeStubs_aarch64.cpp

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 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  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #include "precompiled.hpp"
26 #include "opto/c2_MacroAssembler.hpp"
27 #include "opto/c2_CodeStubs.hpp"

28 #include "runtime/sharedRuntime.hpp"
29 #include "runtime/stubRoutines.hpp"
30 
31 #define __ masm.
32 
33 int C2SafepointPollStub::max_size() const {
34   return 20;
35 }
36 
37 void C2SafepointPollStub::emit(C2_MacroAssembler& masm) {
38   assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
39          "polling page return stub not created yet");
40   address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
41 
42   RuntimeAddress callback_addr(stub);
43 
44   __ bind(entry());
45   InternalAddress safepoint_pc(masm.pc() - masm.offset() + _safepoint_offset);
46   __ adr(rscratch1, safepoint_pc);
47   __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
48   __ far_jump(callback_addr);
49 }
50 
51 int C2EntryBarrierStub::max_size() const {
52   return 24;
53 }
54 
55 void C2EntryBarrierStub::emit(C2_MacroAssembler& masm) {
56   __ bind(entry());
57   __ movptr(rscratch1, (uintptr_t) StubRoutines::aarch64::method_entry_barrier());
58   __ blr(rscratch1);
59   __ b(continuation());
60 
61   __ bind(guard());
62   __ relocate(entry_guard_Relocation::spec());
63   __ emit_int32(0);   // nmethod guard value
64 }
65 






















66 #undef __

 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  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #include "precompiled.hpp"
26 #include "opto/c2_MacroAssembler.hpp"
27 #include "opto/c2_CodeStubs.hpp"
28 #include "runtime/objectMonitor.hpp"
29 #include "runtime/sharedRuntime.hpp"
30 #include "runtime/stubRoutines.hpp"
31 
32 #define __ masm.
33 
34 int C2SafepointPollStub::max_size() const {
35   return 20;
36 }
37 
38 void C2SafepointPollStub::emit(C2_MacroAssembler& masm) {
39   assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
40          "polling page return stub not created yet");
41   address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
42 
43   RuntimeAddress callback_addr(stub);
44 
45   __ bind(entry());
46   InternalAddress safepoint_pc(masm.pc() - masm.offset() + _safepoint_offset);
47   __ adr(rscratch1, safepoint_pc);
48   __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
49   __ far_jump(callback_addr);
50 }
51 
52 int C2EntryBarrierStub::max_size() const {
53   return 24;
54 }
55 
56 void C2EntryBarrierStub::emit(C2_MacroAssembler& masm) {
57   __ bind(entry());
58   __ movptr(rscratch1, (uintptr_t) StubRoutines::aarch64::method_entry_barrier());
59   __ blr(rscratch1);
60   __ b(continuation());
61 
62   __ bind(guard());
63   __ relocate(entry_guard_Relocation::spec());
64   __ emit_int32(0);   // nmethod guard value
65 }
66 
67 int C2CheckLockStackStub::max_size() const {
68   return 20;
69 }
70 
71 void C2CheckLockStackStub::emit(C2_MacroAssembler& masm) {
72   __ bind(entry());
73   assert(StubRoutines::aarch64::check_lock_stack() != NULL, "need runtime call stub");
74   __ far_call(StubRoutines::aarch64::check_lock_stack());
75   __ b(continuation());
76 }
77 
78 int C2LoadNKlassStub::max_size() const {
79   return 8;
80 }
81 
82 void C2LoadNKlassStub::emit(C2_MacroAssembler& masm) {
83   __ bind(entry());
84   Register d = dst();
85   __ ldr(d, Address(d, OM_OFFSET_NO_MONITOR_VALUE_TAG(header)));
86   __ b(continuation());
87 }
88 
89 #undef __
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