1 /* 2 * Copyright (c) 2016, 2018, 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 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "asm/macroAssembler.inline.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "interpreter/interpreterRuntime.hpp" 30 #include "memory/allocation.inline.hpp" 31 #include "memory/universe.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "runtime/handles.inline.hpp" 34 #include "runtime/icache.hpp" 35 #include "runtime/interfaceSupport.inline.hpp" 36 #include "runtime/signature.hpp" 37 38 // Access macros for Java and C arguments. 39 // First Java argument is at index-1. 40 #define locals_j_arg_at(index) Address(Z_R1/*locals*/, in_ByteSize((-(index)*wordSize))) 41 42 #define __ _masm-> 43 44 static int sp_c_int_arg_offset(int arg_nr, int fp_arg_nr) { 45 int int_arg_nr = arg_nr-fp_arg_nr; 46 47 // arg_nr, fp_arg_nr start with 1 => int_arg_nr starts with 0 48 if (int_arg_nr < 5) { 49 return int_arg_nr * wordSize + _z_abi(carg_1); 50 } 51 int offset = int_arg_nr - 5 + (fp_arg_nr > 4 ? fp_arg_nr - 4 : 0); 52 return offset * wordSize + _z_abi(remaining_cargs); 53 } 54 55 static int sp_c_fp_arg_offset(int arg_nr, int fp_arg_nr) { 56 int int_arg_nr = arg_nr-fp_arg_nr; 57 58 // Arg_nr, fp_arg_nr start with 1 => int_arg_nr starts with 0. 59 if (fp_arg_nr < 5) { 60 return (fp_arg_nr - 1 ) * wordSize + _z_abi(cfarg_1); 61 } 62 int offset = fp_arg_nr - 5 + (int_arg_nr > 4 ? int_arg_nr - 4 : 0); 63 return offset * wordSize + _z_abi(remaining_cargs); 64 } 65 66 // Implementation of SignatureHandlerGenerator 67 68 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() { 69 int int_arg_nr = jni_offset() - _fp_arg_nr; 70 Register r = (int_arg_nr < 5 /*max_int_register_arguments*/) ? 71 as_Register(int_arg_nr) + Z_ARG1->encoding() : Z_R0; 72 73 __ z_lgf(r, locals_j_arg_at(offset())); 74 if (DEBUG_ONLY(true ||) int_arg_nr >= 5) { 75 __ z_stg(r, sp_c_int_arg_offset(jni_offset(), _fp_arg_nr), Z_SP); 76 } 77 } 78 79 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() { 80 int int_arg_nr = jni_offset() - _fp_arg_nr; 81 Register r = (int_arg_nr < 5 /*max_int_register_arguments*/) ? 82 as_Register(int_arg_nr) + Z_ARG1->encoding() : Z_R0; 83 84 __ z_lg(r, locals_j_arg_at(offset() + 1)); // Long resides in upper slot. 85 if (DEBUG_ONLY(true ||) int_arg_nr >= 5) { 86 __ z_stg(r, sp_c_int_arg_offset(jni_offset(), _fp_arg_nr), Z_SP); 87 } 88 } 89 90 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() { 91 FloatRegister fp_reg = (_fp_arg_nr < 4/*max_fp_register_arguments*/) ? 92 as_FloatRegister((_fp_arg_nr * 2) + Z_FARG1->encoding()) : Z_F1; 93 _fp_arg_nr++; 94 __ z_ley(fp_reg, locals_j_arg_at(offset())); 95 if (DEBUG_ONLY(true ||) _fp_arg_nr > 4) { 96 __ z_ste(fp_reg, sp_c_fp_arg_offset(jni_offset(), _fp_arg_nr) + 4, Z_SP); 97 } 98 } 99 100 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() { 101 FloatRegister fp_reg = (_fp_arg_nr < 4/*max_fp_register_arguments*/) ? 102 as_FloatRegister((_fp_arg_nr*2) + Z_FARG1->encoding()) : Z_F1; 103 _fp_arg_nr++; 104 __ z_ldy(fp_reg, locals_j_arg_at(offset()+1)); 105 if (DEBUG_ONLY(true ||) _fp_arg_nr > 4) { 106 __ z_std(fp_reg, sp_c_fp_arg_offset(jni_offset(), _fp_arg_nr), Z_SP); 107 } 108 } 109 110 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() { 111 int int_arg_nr = jni_offset() - _fp_arg_nr; 112 Register r = (int_arg_nr < 5 /*max_int_register_arguments*/) ? 113 as_Register(int_arg_nr) + Z_ARG1->encoding() : Z_R0; 114 115 // The handle for a receiver will never be null. 116 bool do_NULL_check = offset() != 0 || is_static(); 117 118 Label do_null; 119 if (do_NULL_check) { 120 __ clear_reg(r, true, false); 121 __ load_and_test_long(Z_R0, locals_j_arg_at(offset())); 122 __ z_bre(do_null); 123 } 124 __ add2reg(r, -offset() * wordSize, Z_R1 /* locals */); 125 __ bind(do_null); 126 if (DEBUG_ONLY(true ||) int_arg_nr >= 5) { 127 __ z_stg(r, sp_c_int_arg_offset(jni_offset(), _fp_arg_nr), Z_SP); 128 } 129 } 130 131 132 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) { 133 __ z_lgr(Z_R1, Z_ARG1); // Z_R1 is used in locals_j_arg_at(index) macro. 134 135 // Generate code to handle arguments. 136 iterate(fingerprint); 137 __ load_const_optimized(Z_RET, AbstractInterpreter::result_handler(method()->result_type())); 138 __ z_br(Z_R14); 139 __ flush(); 140 } 141 142 #undef __ 143 144 // Implementation of SignatureHandlerLibrary 145 146 void SignatureHandlerLibrary::pd_set_handler(address handler) {} 147 148 IRT_ENTRY(address, InterpreterRuntime::get_signature(JavaThread* thread, Method* method)) 149 methodHandle m(thread, method); 150 assert(m->is_native(), "sanity check"); 151 Symbol *s = m->signature(); 152 return (address) s->base(); 153 IRT_END 154 155 IRT_ENTRY(address, InterpreterRuntime::get_result_handler(JavaThread* thread, Method* method)) 156 methodHandle m(thread, method); 157 assert(m->is_native(), "sanity check"); 158 return AbstractInterpreter::result_handler(m->result_type()); 159 IRT_END