1 /*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016 SAP SE. 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 *
92 private:
93 enum {
94 // Instructions are HW (2-byte) aligned on z/Architecture.
95 offset_unit = 2,
96
97 // Encodes Assembler::disp32_operand vs. Assembler::imm64_operand.
98 // (Assembler::call32_operand is used on call instructions only.)
99 format_width = 2
100 };
101
102 public:
103
104 enum relocFormat {
105 no_format = 0,
106 uncompressed_format = 0, // Relocation is for a regular oop.
107 compressed_format = 1, // Relocation is for a narrow (compressed) oop or klass.
108 // Similar to relocInfo::narrow_oop_in_const.
109 pcrel_addr_format = 2, // Relocation is for the target LOCATION of a pc-relative instruction.
110 pcrel_data_format = 3 // Relocation is for the target data of a pc-relative instruction.
111 };
112
113 // Store the new target address into an oop_Relocation cell, if any.
114 // Return indication if update happened.
115 static bool update_oop_pool(address begin, address end, address newTarget, CodeBlob* cb);
116
117 #endif // CPU_S390_VM_RELOCINFO_S390_HPP
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1 /*
2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016, 2018 SAP SE. 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 *
92 private:
93 enum {
94 // Instructions are HW (2-byte) aligned on z/Architecture.
95 offset_unit = 2,
96
97 // Encodes Assembler::disp32_operand vs. Assembler::imm64_operand.
98 // (Assembler::call32_operand is used on call instructions only.)
99 format_width = 2
100 };
101
102 public:
103
104 enum relocFormat {
105 no_format = 0,
106 uncompressed_format = 0, // Relocation is for a regular oop.
107 compressed_format = 1, // Relocation is for a narrow (compressed) oop or klass.
108 // Similar to relocInfo::narrow_oop_in_const.
109 pcrel_addr_format = 2, // Relocation is for the target LOCATION of a pc-relative instruction.
110 pcrel_data_format = 3 // Relocation is for the target data of a pc-relative instruction.
111 };
112
113 // This platform has no oops in the code that are not also
114 // listed in the oop section.
115 static bool mustIterateImmediateOopsInCode() { return false; }
116
117 // Store the new target address into an oop_Relocation cell, if any.
118 // Return indication if update happened.
119 static bool update_oop_pool(address begin, address end, address newTarget, CodeBlob* cb);
120
121 #endif // CPU_S390_VM_RELOCINFO_S390_HPP
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