1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012, 2013 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/assembler.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/method.hpp"
  33 #include "oops/oop.inline.hpp"
  34 #include "runtime/handles.inline.hpp"
  35 #include "runtime/icache.hpp"
  36 #include "runtime/interfaceSupport.hpp"
  37 #include "runtime/signature.hpp"
  38 
  39 #define __ _masm->
  40 
  41 // Access macros for Java and C arguments.
  42 // The first Java argument is at index -1.
  43 #define locals_j_arg_at(index)    (Interpreter::local_offset_in_bytes(index)), R18_locals
  44 // The first C argument is at index 0.
  45 #define sp_c_arg_at(index)        ((index)*wordSize + _abi(carg_1)), R1_SP
  46 
  47 // Implementation of SignatureHandlerGenerator
  48 
  49 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
  50   Argument jni_arg(jni_offset());
  51   Register r = jni_arg.is_register() ? jni_arg.as_register() : R0;
  52 
  53   __ lwa(r, locals_j_arg_at(offset())); // sign extension of integer
  54   if (DEBUG_ONLY(true ||) !jni_arg.is_register()) {
  55     __ std(r, sp_c_arg_at(jni_arg.number()));
  56   }
  57 }
  58 
  59 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
  60   Argument jni_arg(jni_offset());
  61   Register r = jni_arg.is_register() ? jni_arg.as_register() : R0;
  62 
  63   __ ld(r, locals_j_arg_at(offset()+1)); // long resides in upper slot
  64   if (DEBUG_ONLY(true ||) !jni_arg.is_register()) {
  65     __ std(r, sp_c_arg_at(jni_arg.number()));
  66   }
  67 }
  68 
  69 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
  70   FloatRegister fp_reg = (_num_used_fp_arg_regs < 13/*max_fp_register_arguments*/)
  71                          ? as_FloatRegister((_num_used_fp_arg_regs++) + F1_ARG1->encoding())
  72                          : F0;
  73 
  74   __ lfs(fp_reg, locals_j_arg_at(offset()));
  75   if (DEBUG_ONLY(true ||) jni_offset() > 8) {
  76     __ stfs(fp_reg, sp_c_arg_at(jni_offset()));
  77   }
  78 }
  79 
  80 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
  81   FloatRegister fp_reg = (_num_used_fp_arg_regs < 13/*max_fp_register_arguments*/)
  82                          ? as_FloatRegister((_num_used_fp_arg_regs++) + F1_ARG1->encoding())
  83                          : F0;
  84 
  85   __ lfd(fp_reg, locals_j_arg_at(offset()+1));
  86   if (DEBUG_ONLY(true ||) jni_offset() > 8) {
  87     __ stfd(fp_reg, sp_c_arg_at(jni_offset()));
  88   }
  89 }
  90 
  91 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
  92   Argument jni_arg(jni_offset());
  93   Register r = jni_arg.is_register() ? jni_arg.as_register() : R11_scratch1;
  94 
  95   // The handle for a receiver will never be null.
  96   bool do_NULL_check = offset() != 0 || is_static();
  97 
  98   Label do_null;
  99   if (do_NULL_check) {
 100     __ ld(R0, locals_j_arg_at(offset()));
 101     __ cmpdi(CCR0, R0, 0);
 102     __ li(r, 0);
 103     __ beq(CCR0, do_null);
 104   }
 105   __ addir(r, locals_j_arg_at(offset()));
 106   __ bind(do_null);
 107   if (DEBUG_ONLY(true ||) !jni_arg.is_register()) {
 108     __ std(r, sp_c_arg_at(jni_arg.number()));
 109   }
 110 }
 111 
 112 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
 113 #if !defined(ABI_ELFv2)
 114   // Emit fd for current codebuffer. Needs patching!
 115   __ emit_fd();
 116 #endif
 117 
 118   // Generate code to handle arguments.
 119   iterate(fingerprint);
 120 
 121   // Return the result handler.
 122   __ load_const(R3_RET, AbstractInterpreter::result_handler(method()->result_type()));
 123   __ blr();
 124 
 125   __ flush();
 126 }
 127 
 128 #undef __
 129 
 130 // Implementation of SignatureHandlerLibrary
 131 
 132 void SignatureHandlerLibrary::pd_set_handler(address handler) {
 133 #if !defined(ABI_ELFv2)
 134   // patch fd here.
 135   FunctionDescriptor* fd = (FunctionDescriptor*) handler;
 136 
 137   fd->set_entry(handler + (int)sizeof(FunctionDescriptor));
 138   assert(fd->toc() == (address)0xcafe, "need to adjust TOC here");
 139 #endif
 140 }
 141 
 142 
 143 // Access function to get the signature.
 144 IRT_ENTRY(address, InterpreterRuntime::get_signature(JavaThread* thread, Method* method))
 145   methodHandle m(thread, method);
 146   assert(m->is_native(), "sanity check");
 147   Symbol *s = m->signature();
 148   return (address) s->base();
 149 IRT_END
 150 
 151 IRT_ENTRY(address, InterpreterRuntime::get_result_handler(JavaThread* thread, Method* method))
 152   methodHandle m(thread, method);
 153   assert(m->is_native(), "sanity check");
 154   return AbstractInterpreter::result_handler(m->result_type());
 155 IRT_END