/*
* Copyright ( c ) 1997 , 2021 , Oracle and / or its affiliates . All rights reserved .
* Copyright ( c ) 2012 , 2013 SAP SE . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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*/
#include "precompiled.hpp"
#include "asm/assembler.inline.hpp"
#include "interpreter/interp_masm.hpp"
#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "memory/allocation.inline.hpp"
#include "oops/method.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/icache.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/signature.hpp"
#define __ _masm->
// Access macros for Java and C arguments.
// The first Java argument is at index -1.
#define locals_j_arg_at(index) (Interpreter::local_offset_in_bytes(index)), R18_locals
// The first C argument is at index 0.
#define sp_c_arg_at(index) ((index)*wordSize + _abi0(carg_1)), R1_SP
// Implementation of SignatureHandlerGenerator
InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(
const methodHandle& method, CodeBuffer* buffer) : NativeSignatureIterator(method) {
_masm = new MacroAssembler(buffer);
_num_used_fp_arg_regs = 0 ;
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
Argument jni_arg(jni_offset());
Register r = jni_arg.is_register() ? jni_arg.as_register() : R0;
__ lwa(r, locals_j_arg_at(offset())); // sign extension of integer
if (DEBUG_ONLY(true ||) !jni_arg.is_register()) {
__ std(r, sp_c_arg_at(jni_arg.number()));
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
Argument jni_arg(jni_offset());
Register r = jni_arg.is_register() ? jni_arg.as_register() : R0;
__ ld(r, locals_j_arg_at(offset()+1 )); // long resides in upper slot
if (DEBUG_ONLY(true ||) !jni_arg.is_register()) {
__ std(r, sp_c_arg_at(jni_arg.number()));
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
FloatRegister fp_reg = (_num_used_fp_arg_regs < 13 /*max_fp_register_arguments*/)
? as_FloatRegister((_num_used_fp_arg_regs++) + F1_ARG1->encoding())
: F0;
__ lfs(fp_reg, locals_j_arg_at(offset()));
if (DEBUG_ONLY(true ||) jni_offset() > 8 ) {
__ stfs(fp_reg, sp_c_arg_at(jni_offset()));
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
FloatRegister fp_reg = (_num_used_fp_arg_regs < 13 /*max_fp_register_arguments*/)
? as_FloatRegister((_num_used_fp_arg_regs++) + F1_ARG1->encoding())
: F0;
__ lfd(fp_reg, locals_j_arg_at(offset()+1 ));
if (DEBUG_ONLY(true ||) jni_offset() > 8 ) {
__ stfd(fp_reg, sp_c_arg_at(jni_offset()));
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
Argument jni_arg(jni_offset());
Register r = jni_arg.is_register() ? jni_arg.as_register() : R11_scratch1;
// The handle for a receiver will never be null.
bool do_NULL_check = offset() != 0 || is_static();
Label do_null;
if (do_NULL_check) {
__ ld(R0, locals_j_arg_at(offset()));
__ cmpdi(CCR0, R0, 0 );
__ li(r, 0 );
__ beq(CCR0, do_null);
}
__ addir(r, locals_j_arg_at(offset()));
__ bind(do_null);
if (DEBUG_ONLY(true ||) !jni_arg.is_register()) {
__ std(r, sp_c_arg_at(jni_arg.number()));
}
}
void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
#if !defined (ABI_ELFv2)
// Emit fd for current codebuffer. Needs patching!
__ emit_fd();
#endif
// Generate code to handle arguments.
iterate(fingerprint);
// Return the result handler.
__ load_const(R3_RET, AbstractInterpreter::result_handler(method()->result_type()));
__ blr();
__ flush();
}
#undef __
// Implementation of SignatureHandlerLibrary
void SignatureHandlerLibrary::pd_set_handler(address handler) {
#if !defined (ABI_ELFv2)
// patch fd here.
FunctionDescriptor* fd = (FunctionDescriptor*) handler;
fd->set_entry(handler + (int )sizeof (FunctionDescriptor));
assert(fd->toc() == (address)0 xcafe, "need to adjust TOC here" );
#endif
}
// Access function to get the signature.
JRT_ENTRY(address, InterpreterRuntime::get_signature(JavaThread* current, Method* method))
methodHandle m(current, method);
assert(m->is_native(), "sanity check" );
Symbol *s = m->signature();
return (address) s->base();
JRT_END
JRT_ENTRY(address, InterpreterRuntime::get_result_handler(JavaThread* current, Method* method))
methodHandle m(current, method);
assert(m->is_native(), "sanity check" );
return AbstractInterpreter::result_handler(m->result_type());
JRT_END
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