1 /*
2 * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020, 2023, Huawei Technologies Co., Ltd. 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.
51 // emits auipc + jr for address inside code cache
52 __ far_jump(callback_addr);
53 }
54
55 int C2EntryBarrierStub::max_size() const {
56 // 4 bytes for alignment
57 return 4 * NativeInstruction::instruction_size + 4 + 4;
58 }
59
60 void C2EntryBarrierStub::emit(C2_MacroAssembler& masm) {
61 __ bind(entry());
62 // emits auipc + jalr for address inside code cache
63 __ far_call(StubRoutines::method_entry_barrier());
64
65 // emits auipc + jr assuming continuation is not near
66 __ j(continuation());
67
68 // make guard value 4-byte aligned so that it can be accessed atomically
69 __ align(4);
70 __ bind(guard());
71 __ relocate(entry_guard_Relocation::spec());
72 __ emit_int32(0); // nmethod guard value
73 }
74
75 #undef __
|
1 /*
2 * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020, 2023, Huawei Technologies Co., Ltd. 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.
51 // emits auipc + jr for address inside code cache
52 __ far_jump(callback_addr);
53 }
54
55 int C2EntryBarrierStub::max_size() const {
56 // 4 bytes for alignment
57 return 4 * NativeInstruction::instruction_size + 4 + 4;
58 }
59
60 void C2EntryBarrierStub::emit(C2_MacroAssembler& masm) {
61 __ bind(entry());
62 // emits auipc + jalr for address inside code cache
63 __ far_call(StubRoutines::method_entry_barrier());
64
65 // emits auipc + jr assuming continuation is not near
66 __ j(continuation());
67
68 // make guard value 4-byte aligned so that it can be accessed atomically
69 __ align(4);
70 __ bind(guard());
71 __ emit_int32(0); // nmethod guard value
72 }
73
74 #undef __
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