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/*
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* Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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#include "incls/_precompiled.incl"
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#include "incls/_c1_Runtime1_x86.cpp.incl"
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// Implementation of StubAssembler
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int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, int args_size) {
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// setup registers
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const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
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assert(!(oop_result1->is_valid() || oop_result2->is_valid()) || oop_result1 != oop_result2, "registers must be different");
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assert(oop_result1 != thread && oop_result2 != thread, "registers must be different");
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assert(args_size >= 0, "illegal args_size");
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set_num_rt_args(1 + args_size);
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// push java thread (becomes first argument of C function)
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get_thread(thread);
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pushl(thread);
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set_last_Java_frame(thread, noreg, rbp, NULL);
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// do the call
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call(RuntimeAddress(entry));
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int call_offset = offset();
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// verify callee-saved register
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#ifdef ASSERT
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guarantee(thread != rax, "change this code");
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pushl(rax);
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{ Label L;
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get_thread(rax);
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cmpl(thread, rax);
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jcc(Assembler::equal, L);
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int3();
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stop("StubAssembler::call_RT: rdi not callee saved?");
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bind(L);
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}
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popl(rax);
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#endif
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reset_last_Java_frame(thread, true, false);
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// discard thread and arguments
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addl(rsp, (1 + args_size)*BytesPerWord);
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// check for pending exceptions
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{ Label L;
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cmpl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
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jcc(Assembler::equal, L);
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// exception pending => remove activation and forward to exception handler
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movl(rax, Address(thread, Thread::pending_exception_offset()));
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// make sure that the vm_results are cleared
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if (oop_result1->is_valid()) {
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movl(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
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}
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if (oop_result2->is_valid()) {
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movl(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
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}
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if (frame_size() == no_frame_size) {
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leave();
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jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
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} else if (_stub_id == Runtime1::forward_exception_id) {
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should_not_reach_here();
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} else {
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jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
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}
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bind(L);
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}
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// get oop results if there are any and reset the values in the thread
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if (oop_result1->is_valid()) {
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movl(oop_result1, Address(thread, JavaThread::vm_result_offset()));
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movl(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
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verify_oop(oop_result1);
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}
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if (oop_result2->is_valid()) {
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movl(oop_result2, Address(thread, JavaThread::vm_result_2_offset()));
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movl(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
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verify_oop(oop_result2);
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}
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return call_offset;
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}
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int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1) {
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pushl(arg1);
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return call_RT(oop_result1, oop_result2, entry, 1);
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}
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int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1, Register arg2) {
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pushl(arg2);
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pushl(arg1);
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return call_RT(oop_result1, oop_result2, entry, 2);
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}
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int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1, Register arg2, Register arg3) {
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pushl(arg3);
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pushl(arg2);
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pushl(arg1);
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return call_RT(oop_result1, oop_result2, entry, 3);
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}
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// Implementation of StubFrame
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class StubFrame: public StackObj {
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private:
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StubAssembler* _sasm;
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public:
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StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
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void load_argument(int offset_in_words, Register reg);
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~StubFrame();
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};
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#define __ _sasm->
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StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
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_sasm = sasm;
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__ set_info(name, must_gc_arguments);
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__ enter();
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}
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// load parameters that were stored with LIR_Assembler::store_parameter
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// Note: offsets for store_parameter and load_argument must match
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void StubFrame::load_argument(int offset_in_words, Register reg) {
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// rbp, + 0: link
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// + 1: return address
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// + 2: argument with offset 0
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// + 3: argument with offset 1
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// + 4: ...
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__ movl(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
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}
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StubFrame::~StubFrame() {
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__ leave();
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__ ret(0);
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}
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#undef __
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// Implementation of Runtime1
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#define __ sasm->
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const int float_regs_as_doubles_size_in_words = 16;
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const int xmm_regs_as_doubles_size_in_words = 16;
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// Stack layout for saving/restoring all the registers needed during a runtime
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// call (this includes deoptimization)
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// Note: note that users of this frame may well have arguments to some runtime
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// while these values are on the stack. These positions neglect those arguments
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// but the code in save_live_registers will take the argument count into
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// account.
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//
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enum reg_save_layout {
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dummy1,
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dummy2,
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// Two temps to be used as needed by users of save/restore callee registers
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temp_2_off,
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temp_1_off,
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xmm_regs_as_doubles_off,
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float_regs_as_doubles_off = xmm_regs_as_doubles_off + xmm_regs_as_doubles_size_in_words,
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fpu_state_off = float_regs_as_doubles_off + float_regs_as_doubles_size_in_words,
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fpu_state_end_off = fpu_state_off + FPUStateSizeInWords,
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marker = fpu_state_end_off,
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extra_space_offset,
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rdi_off = extra_space_offset,
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rsi_off,
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rbp_off,
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rsp_off,
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rbx_off,
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rdx_off,
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rcx_off,
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rax_off,
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saved_rbp_off,
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return_off,
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reg_save_frame_size, // As noted: neglects any parameters to runtime
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// equates
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// illegal instruction handler
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continue_dest_off = temp_1_off,
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// deoptimization equates
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fp0_off = float_regs_as_doubles_off, // slot for java float/double return value
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xmm0_off = xmm_regs_as_doubles_off, // slot for java float/double return value
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deopt_type = temp_2_off, // slot for type of deopt in progress
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ret_type = temp_1_off // slot for return type
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};
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// Save off registers which might be killed by calls into the runtime.
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// Tries to smart of about FP registers. In particular we separate
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// saving and describing the FPU registers for deoptimization since we
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// have to save the FPU registers twice if we describe them and on P4
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// saving FPU registers which don't contain anything appears
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// expensive. The deopt blob is the only thing which needs to
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// describe FPU registers. In all other cases it should be sufficient
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// to simply save their current value.
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static OopMap* generate_oop_map(StubAssembler* sasm, int num_rt_args,
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bool save_fpu_registers = true) {
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int frame_size = reg_save_frame_size + num_rt_args; // args + thread
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sasm->set_frame_size(frame_size);
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// record saved value locations in an OopMap
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// locations are offsets from sp after runtime call; num_rt_args is number of arguments in call, including thread
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OopMap* map = new OopMap(frame_size, 0);
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map->set_callee_saved(VMRegImpl::stack2reg(rax_off + num_rt_args), rax->as_VMReg());
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map->set_callee_saved(VMRegImpl::stack2reg(rcx_off + num_rt_args), rcx->as_VMReg());
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map->set_callee_saved(VMRegImpl::stack2reg(rdx_off + num_rt_args), rdx->as_VMReg());
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map->set_callee_saved(VMRegImpl::stack2reg(rbx_off + num_rt_args), rbx->as_VMReg());
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map->set_callee_saved(VMRegImpl::stack2reg(rsi_off + num_rt_args), rsi->as_VMReg());
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map->set_callee_saved(VMRegImpl::stack2reg(rdi_off + num_rt_args), rdi->as_VMReg());
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if (save_fpu_registers) {
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if (UseSSE < 2) {
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int fpu_off = float_regs_as_doubles_off;
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for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
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VMReg fpu_name_0 = FrameMap::fpu_regname(n);
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map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + num_rt_args), fpu_name_0);
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// %%% This is really a waste but we'll keep things as they were for now
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if (true) {
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map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + 1 + num_rt_args), fpu_name_0->next());
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}
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fpu_off += 2;
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}
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assert(fpu_off == fpu_state_off, "incorrect number of fpu stack slots");
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}
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if (UseSSE >= 2) {
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int xmm_off = xmm_regs_as_doubles_off;
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for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
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VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
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map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
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// %%% This is really a waste but we'll keep things as they were for now
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if (true) {
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map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + 1 + num_rt_args), xmm_name_0->next());
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}
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xmm_off += 2;
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}
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assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
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} else if (UseSSE == 1) {
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int xmm_off = xmm_regs_as_doubles_off;
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for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
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VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
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map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
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xmm_off += 2;
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}
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assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
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}
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}
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return map;
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}
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static OopMap* save_live_registers(StubAssembler* sasm, int num_rt_args,
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bool save_fpu_registers = true) {
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__ block_comment("save_live_registers");
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int frame_size = reg_save_frame_size + num_rt_args; // args + thread
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// frame_size = round_to(frame_size, 4);
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sasm->set_frame_size(frame_size);
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__ pushad(); // integer registers
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// assert(float_regs_as_doubles_off % 2 == 0, "misaligned offset");
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// assert(xmm_regs_as_doubles_off % 2 == 0, "misaligned offset");
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__ subl(rsp, extra_space_offset * wordSize);
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#ifdef ASSERT
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__ movl(Address(rsp, marker * wordSize), 0xfeedbeef);
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#endif
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if (save_fpu_registers) {
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if (UseSSE < 2) {
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// save FPU stack
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__ fnsave(Address(rsp, fpu_state_off * wordSize));
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__ fwait();
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#ifdef ASSERT
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Label ok;
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__ cmpw(Address(rsp, fpu_state_off * wordSize), StubRoutines::fpu_cntrl_wrd_std());
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__ jccb(Assembler::equal, ok);
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__ stop("corrupted control word detected");
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__ bind(ok);
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#endif
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// Reset the control word to guard against exceptions being unmasked
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// since fstp_d can cause FPU stack underflow exceptions. Write it
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// into the on stack copy and then reload that to make sure that the
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// current and future values are correct.
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__ movw(Address(rsp, fpu_state_off * wordSize), StubRoutines::fpu_cntrl_wrd_std());
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__ frstor(Address(rsp, fpu_state_off * wordSize));
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// Save the FPU registers in de-opt-able form
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 0));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 8));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 16));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 24));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 32));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 40));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 48));
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__ fstp_d(Address(rsp, float_regs_as_doubles_off * BytesPerWord + 56));
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}
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if (UseSSE >= 2) {
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// save XMM registers
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// XMM registers can contain float or double values, but this is not known here,
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// so always save them as doubles.
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// note that float values are _not_ converted automatically, so for float values
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// the second word contains only garbage data.
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 0), xmm0);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 8), xmm1);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 16), xmm2);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 24), xmm3);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 32), xmm4);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 40), xmm5);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 48), xmm6);
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__ movdbl(Address(rsp, xmm_regs_as_doubles_off * wordSize + 56), xmm7);
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} else if (UseSSE == 1) {
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// save XMM registers as float because double not supported without SSE2
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__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 0), xmm0);
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|
355 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 8), xmm1);
|
|
356 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 16), xmm2);
|
|
357 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 24), xmm3);
|
|
358 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 32), xmm4);
|
|
359 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 40), xmm5);
|
|
360 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 48), xmm6);
|
|
361 |
__ movflt(Address(rsp, xmm_regs_as_doubles_off * wordSize + 56), xmm7);
|
|
362 |
}
|
|
363 |
}
|
|
364 |
|
|
365 |
// FPU stack must be empty now
|
|
366 |
__ verify_FPU(0, "save_live_registers");
|
|
367 |
|
|
368 |
return generate_oop_map(sasm, num_rt_args, save_fpu_registers);
|
|
369 |
}
|
|
370 |
|
|
371 |
|
|
372 |
static void restore_fpu(StubAssembler* sasm, bool restore_fpu_registers = true) {
|
|
373 |
if (restore_fpu_registers) {
|
|
374 |
if (UseSSE >= 2) {
|
|
375 |
// restore XMM registers
|
|
376 |
__ movdbl(xmm0, Address(rsp, xmm_regs_as_doubles_off * wordSize + 0));
|
|
377 |
__ movdbl(xmm1, Address(rsp, xmm_regs_as_doubles_off * wordSize + 8));
|
|
378 |
__ movdbl(xmm2, Address(rsp, xmm_regs_as_doubles_off * wordSize + 16));
|
|
379 |
__ movdbl(xmm3, Address(rsp, xmm_regs_as_doubles_off * wordSize + 24));
|
|
380 |
__ movdbl(xmm4, Address(rsp, xmm_regs_as_doubles_off * wordSize + 32));
|
|
381 |
__ movdbl(xmm5, Address(rsp, xmm_regs_as_doubles_off * wordSize + 40));
|
|
382 |
__ movdbl(xmm6, Address(rsp, xmm_regs_as_doubles_off * wordSize + 48));
|
|
383 |
__ movdbl(xmm7, Address(rsp, xmm_regs_as_doubles_off * wordSize + 56));
|
|
384 |
} else if (UseSSE == 1) {
|
|
385 |
// restore XMM registers
|
|
386 |
__ movflt(xmm0, Address(rsp, xmm_regs_as_doubles_off * wordSize + 0));
|
|
387 |
__ movflt(xmm1, Address(rsp, xmm_regs_as_doubles_off * wordSize + 8));
|
|
388 |
__ movflt(xmm2, Address(rsp, xmm_regs_as_doubles_off * wordSize + 16));
|
|
389 |
__ movflt(xmm3, Address(rsp, xmm_regs_as_doubles_off * wordSize + 24));
|
|
390 |
__ movflt(xmm4, Address(rsp, xmm_regs_as_doubles_off * wordSize + 32));
|
|
391 |
__ movflt(xmm5, Address(rsp, xmm_regs_as_doubles_off * wordSize + 40));
|
|
392 |
__ movflt(xmm6, Address(rsp, xmm_regs_as_doubles_off * wordSize + 48));
|
|
393 |
__ movflt(xmm7, Address(rsp, xmm_regs_as_doubles_off * wordSize + 56));
|
|
394 |
}
|
|
395 |
|
|
396 |
if (UseSSE < 2) {
|
|
397 |
__ frstor(Address(rsp, fpu_state_off * wordSize));
|
|
398 |
} else {
|
|
399 |
// check that FPU stack is really empty
|
|
400 |
__ verify_FPU(0, "restore_live_registers");
|
|
401 |
}
|
|
402 |
|
|
403 |
} else {
|
|
404 |
// check that FPU stack is really empty
|
|
405 |
__ verify_FPU(0, "restore_live_registers");
|
|
406 |
}
|
|
407 |
|
|
408 |
#ifdef ASSERT
|
|
409 |
{
|
|
410 |
Label ok;
|
|
411 |
__ cmpl(Address(rsp, marker * wordSize), 0xfeedbeef);
|
|
412 |
__ jcc(Assembler::equal, ok);
|
|
413 |
__ stop("bad offsets in frame");
|
|
414 |
__ bind(ok);
|
|
415 |
}
|
|
416 |
#endif
|
|
417 |
|
|
418 |
__ addl(rsp, extra_space_offset * wordSize);
|
|
419 |
}
|
|
420 |
|
|
421 |
|
|
422 |
static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
|
|
423 |
__ block_comment("restore_live_registers");
|
|
424 |
|
|
425 |
restore_fpu(sasm, restore_fpu_registers);
|
|
426 |
__ popad();
|
|
427 |
}
|
|
428 |
|
|
429 |
|
|
430 |
static void restore_live_registers_except_rax(StubAssembler* sasm, bool restore_fpu_registers = true) {
|
|
431 |
__ block_comment("restore_live_registers_except_rax");
|
|
432 |
|
|
433 |
restore_fpu(sasm, restore_fpu_registers);
|
|
434 |
|
|
435 |
__ popl(rdi);
|
|
436 |
__ popl(rsi);
|
|
437 |
__ popl(rbp);
|
|
438 |
__ popl(rbx); // skip this value
|
|
439 |
__ popl(rbx);
|
|
440 |
__ popl(rdx);
|
|
441 |
__ popl(rcx);
|
|
442 |
__ addl(rsp, 4);
|
|
443 |
}
|
|
444 |
|
|
445 |
|
|
446 |
void Runtime1::initialize_pd() {
|
|
447 |
// nothing to do
|
|
448 |
}
|
|
449 |
|
|
450 |
|
|
451 |
// target: the entry point of the method that creates and posts the exception oop
|
|
452 |
// has_argument: true if the exception needs an argument (passed on stack because registers must be preserved)
|
|
453 |
|
|
454 |
OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
|
|
455 |
// preserve all registers
|
|
456 |
int num_rt_args = has_argument ? 2 : 1;
|
|
457 |
OopMap* oop_map = save_live_registers(sasm, num_rt_args);
|
|
458 |
|
|
459 |
// now all registers are saved and can be used freely
|
|
460 |
// verify that no old value is used accidentally
|
|
461 |
__ invalidate_registers(true, true, true, true, true, true);
|
|
462 |
|
|
463 |
// registers used by this stub
|
|
464 |
const Register temp_reg = rbx;
|
|
465 |
|
|
466 |
// load argument for exception that is passed as an argument into the stub
|
|
467 |
if (has_argument) {
|
|
468 |
__ movl(temp_reg, Address(rbp, 2*BytesPerWord));
|
|
469 |
__ pushl(temp_reg);
|
|
470 |
}
|
|
471 |
|
|
472 |
int call_offset = __ call_RT(noreg, noreg, target, num_rt_args - 1);
|
|
473 |
|
|
474 |
OopMapSet* oop_maps = new OopMapSet();
|
|
475 |
oop_maps->add_gc_map(call_offset, oop_map);
|
|
476 |
|
|
477 |
__ stop("should not reach here");
|
|
478 |
|
|
479 |
return oop_maps;
|
|
480 |
}
|
|
481 |
|
|
482 |
|
|
483 |
void Runtime1::generate_handle_exception(StubAssembler *sasm, OopMapSet* oop_maps, OopMap* oop_map, bool save_fpu_registers) {
|
|
484 |
// incoming parameters
|
|
485 |
const Register exception_oop = rax;
|
|
486 |
const Register exception_pc = rdx;
|
|
487 |
// other registers used in this stub
|
|
488 |
const Register real_return_addr = rbx;
|
|
489 |
const Register thread = rdi;
|
|
490 |
|
|
491 |
__ block_comment("generate_handle_exception");
|
|
492 |
|
|
493 |
#ifdef TIERED
|
|
494 |
// C2 can leave the fpu stack dirty
|
|
495 |
if (UseSSE < 2 ) {
|
|
496 |
__ empty_FPU_stack();
|
|
497 |
}
|
|
498 |
#endif // TIERED
|
|
499 |
|
|
500 |
// verify that only rax, and rdx is valid at this time
|
|
501 |
__ invalidate_registers(false, true, true, false, true, true);
|
|
502 |
// verify that rax, contains a valid exception
|
|
503 |
__ verify_not_null_oop(exception_oop);
|
|
504 |
|
|
505 |
// load address of JavaThread object for thread-local data
|
|
506 |
__ get_thread(thread);
|
|
507 |
|
|
508 |
#ifdef ASSERT
|
|
509 |
// check that fields in JavaThread for exception oop and issuing pc are
|
|
510 |
// empty before writing to them
|
|
511 |
Label oop_empty;
|
|
512 |
__ cmpl(Address(thread, JavaThread::exception_oop_offset()), 0);
|
|
513 |
__ jcc(Assembler::equal, oop_empty);
|
|
514 |
__ stop("exception oop already set");
|
|
515 |
__ bind(oop_empty);
|
|
516 |
|
|
517 |
Label pc_empty;
|
|
518 |
__ cmpl(Address(thread, JavaThread::exception_pc_offset()), 0);
|
|
519 |
__ jcc(Assembler::equal, pc_empty);
|
|
520 |
__ stop("exception pc already set");
|
|
521 |
__ bind(pc_empty);
|
|
522 |
#endif
|
|
523 |
|
|
524 |
// save exception oop and issuing pc into JavaThread
|
|
525 |
// (exception handler will load it from here)
|
|
526 |
__ movl(Address(thread, JavaThread::exception_oop_offset()), exception_oop);
|
|
527 |
__ movl(Address(thread, JavaThread::exception_pc_offset()), exception_pc);
|
|
528 |
|
|
529 |
// save real return address (pc that called this stub)
|
|
530 |
__ movl(real_return_addr, Address(rbp, 1*BytesPerWord));
|
|
531 |
__ movl(Address(rsp, temp_1_off * BytesPerWord), real_return_addr);
|
|
532 |
|
|
533 |
// patch throwing pc into return address (has bci & oop map)
|
|
534 |
__ movl(Address(rbp, 1*BytesPerWord), exception_pc);
|
|
535 |
|
|
536 |
// compute the exception handler.
|
|
537 |
// the exception oop and the throwing pc are read from the fields in JavaThread
|
|
538 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
|
|
539 |
oop_maps->add_gc_map(call_offset, oop_map);
|
|
540 |
|
|
541 |
// rax,: handler address or NULL if no handler exists
|
|
542 |
// will be the deopt blob if nmethod was deoptimized while we looked up
|
|
543 |
// handler regardless of whether handler existed in the nmethod.
|
|
544 |
|
|
545 |
// only rax, is valid at this time, all other registers have been destroyed by the runtime call
|
|
546 |
__ invalidate_registers(false, true, true, true, true, true);
|
|
547 |
|
|
548 |
// Do we have an exception handler in the nmethod?
|
|
549 |
Label no_handler;
|
|
550 |
Label done;
|
|
551 |
__ testl(rax, rax);
|
|
552 |
__ jcc(Assembler::zero, no_handler);
|
|
553 |
|
|
554 |
// exception handler found
|
|
555 |
// patch the return address -> the stub will directly return to the exception handler
|
|
556 |
__ movl(Address(rbp, 1*BytesPerWord), rax);
|
|
557 |
|
|
558 |
// restore registers
|
|
559 |
restore_live_registers(sasm, save_fpu_registers);
|
|
560 |
|
|
561 |
// return to exception handler
|
|
562 |
__ leave();
|
|
563 |
__ ret(0);
|
|
564 |
|
|
565 |
__ bind(no_handler);
|
|
566 |
// no exception handler found in this method, so the exception is
|
|
567 |
// forwarded to the caller (using the unwind code of the nmethod)
|
|
568 |
// there is no need to restore the registers
|
|
569 |
|
|
570 |
// restore the real return address that was saved before the RT-call
|
|
571 |
__ movl(real_return_addr, Address(rsp, temp_1_off * BytesPerWord));
|
|
572 |
__ movl(Address(rbp, 1*BytesPerWord), real_return_addr);
|
|
573 |
|
|
574 |
// load address of JavaThread object for thread-local data
|
|
575 |
__ get_thread(thread);
|
|
576 |
// restore exception oop into rax, (convention for unwind code)
|
|
577 |
__ movl(exception_oop, Address(thread, JavaThread::exception_oop_offset()));
|
|
578 |
|
|
579 |
// clear exception fields in JavaThread because they are no longer needed
|
|
580 |
// (fields must be cleared because they are processed by GC otherwise)
|
|
581 |
__ movl(Address(thread, JavaThread::exception_oop_offset()), NULL_WORD);
|
|
582 |
__ movl(Address(thread, JavaThread::exception_pc_offset()), NULL_WORD);
|
|
583 |
|
|
584 |
// pop the stub frame off
|
|
585 |
__ leave();
|
|
586 |
|
|
587 |
generate_unwind_exception(sasm);
|
|
588 |
__ stop("should not reach here");
|
|
589 |
}
|
|
590 |
|
|
591 |
|
|
592 |
void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
|
|
593 |
// incoming parameters
|
|
594 |
const Register exception_oop = rax;
|
|
595 |
// other registers used in this stub
|
|
596 |
const Register exception_pc = rdx;
|
|
597 |
const Register handler_addr = rbx;
|
|
598 |
const Register thread = rdi;
|
|
599 |
|
|
600 |
// verify that only rax, is valid at this time
|
|
601 |
__ invalidate_registers(false, true, true, true, true, true);
|
|
602 |
|
|
603 |
#ifdef ASSERT
|
|
604 |
// check that fields in JavaThread for exception oop and issuing pc are empty
|
|
605 |
__ get_thread(thread);
|
|
606 |
Label oop_empty;
|
|
607 |
__ cmpl(Address(thread, JavaThread::exception_oop_offset()), 0);
|
|
608 |
__ jcc(Assembler::equal, oop_empty);
|
|
609 |
__ stop("exception oop must be empty");
|
|
610 |
__ bind(oop_empty);
|
|
611 |
|
|
612 |
Label pc_empty;
|
|
613 |
__ cmpl(Address(thread, JavaThread::exception_pc_offset()), 0);
|
|
614 |
__ jcc(Assembler::equal, pc_empty);
|
|
615 |
__ stop("exception pc must be empty");
|
|
616 |
__ bind(pc_empty);
|
|
617 |
#endif
|
|
618 |
|
|
619 |
// clear the FPU stack in case any FPU results are left behind
|
|
620 |
__ empty_FPU_stack();
|
|
621 |
|
|
622 |
// leave activation of nmethod
|
|
623 |
__ leave();
|
|
624 |
// store return address (is on top of stack after leave)
|
|
625 |
__ movl(exception_pc, Address(rsp, 0));
|
|
626 |
|
|
627 |
__ verify_oop(exception_oop);
|
|
628 |
|
|
629 |
// save exception oop from rax, to stack before call
|
|
630 |
__ pushl(exception_oop);
|
|
631 |
|
|
632 |
// search the exception handler address of the caller (using the return address)
|
|
633 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), exception_pc);
|
|
634 |
// rax,: exception handler address of the caller
|
|
635 |
|
|
636 |
// only rax, is valid at this time, all other registers have been destroyed by the call
|
|
637 |
__ invalidate_registers(false, true, true, true, true, true);
|
|
638 |
|
|
639 |
// move result of call into correct register
|
|
640 |
__ movl(handler_addr, rax);
|
|
641 |
|
|
642 |
// restore exception oop in rax, (required convention of exception handler)
|
|
643 |
__ popl(exception_oop);
|
|
644 |
|
|
645 |
__ verify_oop(exception_oop);
|
|
646 |
|
|
647 |
// get throwing pc (= return address).
|
|
648 |
// rdx has been destroyed by the call, so it must be set again
|
|
649 |
// the pop is also necessary to simulate the effect of a ret(0)
|
|
650 |
__ popl(exception_pc);
|
|
651 |
|
|
652 |
// verify that that there is really a valid exception in rax,
|
|
653 |
__ verify_not_null_oop(exception_oop);
|
|
654 |
|
|
655 |
// continue at exception handler (return address removed)
|
|
656 |
// note: do *not* remove arguments when unwinding the
|
|
657 |
// activation since the caller assumes having
|
|
658 |
// all arguments on the stack when entering the
|
|
659 |
// runtime to determine the exception handler
|
|
660 |
// (GC happens at call site with arguments!)
|
|
661 |
// rax,: exception oop
|
|
662 |
// rdx: throwing pc
|
|
663 |
// rbx,: exception handler
|
|
664 |
__ jmp(handler_addr);
|
|
665 |
}
|
|
666 |
|
|
667 |
|
|
668 |
OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
|
|
669 |
// use the maximum number of runtime-arguments here because it is difficult to
|
|
670 |
// distinguish each RT-Call.
|
|
671 |
// Note: This number affects also the RT-Call in generate_handle_exception because
|
|
672 |
// the oop-map is shared for all calls.
|
|
673 |
const int num_rt_args = 2; // thread + dummy
|
|
674 |
|
|
675 |
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
|
|
676 |
assert(deopt_blob != NULL, "deoptimization blob must have been created");
|
|
677 |
|
|
678 |
OopMap* oop_map = save_live_registers(sasm, num_rt_args);
|
|
679 |
|
|
680 |
__ pushl(rax); // push dummy
|
|
681 |
|
|
682 |
const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
|
|
683 |
// push java thread (becomes first argument of C function)
|
|
684 |
__ get_thread(thread);
|
|
685 |
__ pushl(thread);
|
|
686 |
__ set_last_Java_frame(thread, noreg, rbp, NULL);
|
|
687 |
// do the call
|
|
688 |
__ call(RuntimeAddress(target));
|
|
689 |
OopMapSet* oop_maps = new OopMapSet();
|
|
690 |
oop_maps->add_gc_map(__ offset(), oop_map);
|
|
691 |
// verify callee-saved register
|
|
692 |
#ifdef ASSERT
|
|
693 |
guarantee(thread != rax, "change this code");
|
|
694 |
__ pushl(rax);
|
|
695 |
{ Label L;
|
|
696 |
__ get_thread(rax);
|
|
697 |
__ cmpl(thread, rax);
|
|
698 |
__ jcc(Assembler::equal, L);
|
|
699 |
__ stop("StubAssembler::call_RT: rdi not callee saved?");
|
|
700 |
__ bind(L);
|
|
701 |
}
|
|
702 |
__ popl(rax);
|
|
703 |
#endif
|
|
704 |
__ reset_last_Java_frame(thread, true, false);
|
|
705 |
__ popl(rcx); // discard thread arg
|
|
706 |
__ popl(rcx); // discard dummy
|
|
707 |
|
|
708 |
// check for pending exceptions
|
|
709 |
{ Label L;
|
|
710 |
__ cmpl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
711 |
__ jcc(Assembler::equal, L);
|
|
712 |
// exception pending => remove activation and forward to exception handler
|
|
713 |
|
|
714 |
__ testl(rax, rax); // have we deoptimized?
|
|
715 |
__ jump_cc(Assembler::equal,
|
|
716 |
RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
|
|
717 |
|
|
718 |
// the deopt blob expects exceptions in the special fields of
|
|
719 |
// JavaThread, so copy and clear pending exception.
|
|
720 |
|
|
721 |
// load and clear pending exception
|
|
722 |
__ movl(rax, Address(thread, Thread::pending_exception_offset()));
|
|
723 |
__ movl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
724 |
|
|
725 |
// check that there is really a valid exception
|
|
726 |
__ verify_not_null_oop(rax);
|
|
727 |
|
|
728 |
// load throwing pc: this is the return address of the stub
|
|
729 |
__ movl(rdx, Address(rsp, return_off * BytesPerWord));
|
|
730 |
|
|
731 |
#ifdef ASSERT
|
|
732 |
// check that fields in JavaThread for exception oop and issuing pc are empty
|
|
733 |
Label oop_empty;
|
|
734 |
__ cmpoop(Address(thread, JavaThread::exception_oop_offset()), 0);
|
|
735 |
__ jcc(Assembler::equal, oop_empty);
|
|
736 |
__ stop("exception oop must be empty");
|
|
737 |
__ bind(oop_empty);
|
|
738 |
|
|
739 |
Label pc_empty;
|
|
740 |
__ cmpl(Address(thread, JavaThread::exception_pc_offset()), 0);
|
|
741 |
__ jcc(Assembler::equal, pc_empty);
|
|
742 |
__ stop("exception pc must be empty");
|
|
743 |
__ bind(pc_empty);
|
|
744 |
#endif
|
|
745 |
|
|
746 |
// store exception oop and throwing pc to JavaThread
|
|
747 |
__ movl(Address(thread, JavaThread::exception_oop_offset()), rax);
|
|
748 |
__ movl(Address(thread, JavaThread::exception_pc_offset()), rdx);
|
|
749 |
|
|
750 |
restore_live_registers(sasm);
|
|
751 |
|
|
752 |
__ leave();
|
|
753 |
__ addl(rsp, 4); // remove return address from stack
|
|
754 |
|
|
755 |
// Forward the exception directly to deopt blob. We can blow no
|
|
756 |
// registers and must leave throwing pc on the stack. A patch may
|
|
757 |
// have values live in registers so the entry point with the
|
|
758 |
// exception in tls.
|
|
759 |
__ jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
|
|
760 |
|
|
761 |
__ bind(L);
|
|
762 |
}
|
|
763 |
|
|
764 |
|
|
765 |
// Runtime will return true if the nmethod has been deoptimized during
|
|
766 |
// the patching process. In that case we must do a deopt reexecute instead.
|
|
767 |
|
|
768 |
Label reexecuteEntry, cont;
|
|
769 |
|
|
770 |
__ testl(rax, rax); // have we deoptimized?
|
|
771 |
__ jcc(Assembler::equal, cont); // no
|
|
772 |
|
|
773 |
// Will reexecute. Proper return address is already on the stack we just restore
|
|
774 |
// registers, pop all of our frame but the return address and jump to the deopt blob
|
|
775 |
restore_live_registers(sasm);
|
|
776 |
__ leave();
|
|
777 |
__ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
|
|
778 |
|
|
779 |
__ bind(cont);
|
|
780 |
restore_live_registers(sasm);
|
|
781 |
__ leave();
|
|
782 |
__ ret(0);
|
|
783 |
|
|
784 |
return oop_maps;
|
|
785 |
|
|
786 |
}
|
|
787 |
|
|
788 |
|
|
789 |
OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
|
|
790 |
|
|
791 |
// for better readability
|
|
792 |
const bool must_gc_arguments = true;
|
|
793 |
const bool dont_gc_arguments = false;
|
|
794 |
|
|
795 |
// default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
|
|
796 |
bool save_fpu_registers = true;
|
|
797 |
|
|
798 |
// stub code & info for the different stubs
|
|
799 |
OopMapSet* oop_maps = NULL;
|
|
800 |
switch (id) {
|
|
801 |
case forward_exception_id:
|
|
802 |
{
|
|
803 |
// we're handling an exception in the context of a compiled
|
|
804 |
// frame. The registers have been saved in the standard
|
|
805 |
// places. Perform an exception lookup in the caller and
|
|
806 |
// dispatch to the handler if found. Otherwise unwind and
|
|
807 |
// dispatch to the callers exception handler.
|
|
808 |
|
|
809 |
const Register thread = rdi;
|
|
810 |
const Register exception_oop = rax;
|
|
811 |
const Register exception_pc = rdx;
|
|
812 |
|
|
813 |
// load pending exception oop into rax,
|
|
814 |
__ movl(exception_oop, Address(thread, Thread::pending_exception_offset()));
|
|
815 |
// clear pending exception
|
|
816 |
__ movl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
817 |
|
|
818 |
// load issuing PC (the return address for this stub) into rdx
|
|
819 |
__ movl(exception_pc, Address(rbp, 1*BytesPerWord));
|
|
820 |
|
|
821 |
// make sure that the vm_results are cleared (may be unnecessary)
|
|
822 |
__ movl(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
|
|
823 |
__ movl(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
|
|
824 |
|
|
825 |
// verify that that there is really a valid exception in rax,
|
|
826 |
__ verify_not_null_oop(exception_oop);
|
|
827 |
|
|
828 |
|
|
829 |
oop_maps = new OopMapSet();
|
|
830 |
OopMap* oop_map = generate_oop_map(sasm, 1);
|
|
831 |
generate_handle_exception(sasm, oop_maps, oop_map);
|
|
832 |
__ stop("should not reach here");
|
|
833 |
}
|
|
834 |
break;
|
|
835 |
|
|
836 |
case new_instance_id:
|
|
837 |
case fast_new_instance_id:
|
|
838 |
case fast_new_instance_init_check_id:
|
|
839 |
{
|
|
840 |
Register klass = rdx; // Incoming
|
|
841 |
Register obj = rax; // Result
|
|
842 |
|
|
843 |
if (id == new_instance_id) {
|
|
844 |
__ set_info("new_instance", dont_gc_arguments);
|
|
845 |
} else if (id == fast_new_instance_id) {
|
|
846 |
__ set_info("fast new_instance", dont_gc_arguments);
|
|
847 |
} else {
|
|
848 |
assert(id == fast_new_instance_init_check_id, "bad StubID");
|
|
849 |
__ set_info("fast new_instance init check", dont_gc_arguments);
|
|
850 |
}
|
|
851 |
|
|
852 |
if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
|
|
853 |
UseTLAB && FastTLABRefill) {
|
|
854 |
Label slow_path;
|
|
855 |
Register obj_size = rcx;
|
|
856 |
Register t1 = rbx;
|
|
857 |
Register t2 = rsi;
|
|
858 |
assert_different_registers(klass, obj, obj_size, t1, t2);
|
|
859 |
|
|
860 |
__ pushl(rdi);
|
|
861 |
__ pushl(rbx);
|
|
862 |
|
|
863 |
if (id == fast_new_instance_init_check_id) {
|
|
864 |
// make sure the klass is initialized
|
|
865 |
__ cmpl(Address(klass, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)), instanceKlass::fully_initialized);
|
|
866 |
__ jcc(Assembler::notEqual, slow_path);
|
|
867 |
}
|
|
868 |
|
|
869 |
#ifdef ASSERT
|
|
870 |
// assert object can be fast path allocated
|
|
871 |
{
|
|
872 |
Label ok, not_ok;
|
|
873 |
__ movl(obj_size, Address(klass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc)));
|
|
874 |
__ cmpl(obj_size, 0); // make sure it's an instance (LH > 0)
|
|
875 |
__ jcc(Assembler::lessEqual, not_ok);
|
|
876 |
__ testl(obj_size, Klass::_lh_instance_slow_path_bit);
|
|
877 |
__ jcc(Assembler::zero, ok);
|
|
878 |
__ bind(not_ok);
|
|
879 |
__ stop("assert(can be fast path allocated)");
|
|
880 |
__ should_not_reach_here();
|
|
881 |
__ bind(ok);
|
|
882 |
}
|
|
883 |
#endif // ASSERT
|
|
884 |
|
|
885 |
// if we got here then the TLAB allocation failed, so try
|
|
886 |
// refilling the TLAB or allocating directly from eden.
|
|
887 |
Label retry_tlab, try_eden;
|
|
888 |
__ tlab_refill(retry_tlab, try_eden, slow_path); // does not destroy rdx (klass)
|
|
889 |
|
|
890 |
__ bind(retry_tlab);
|
|
891 |
|
|
892 |
// get the instance size
|
|
893 |
__ movl(obj_size, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
894 |
__ tlab_allocate(obj, obj_size, 0, t1, t2, slow_path);
|
|
895 |
__ initialize_object(obj, klass, obj_size, 0, t1, t2);
|
|
896 |
__ verify_oop(obj);
|
|
897 |
__ popl(rbx);
|
|
898 |
__ popl(rdi);
|
|
899 |
__ ret(0);
|
|
900 |
|
|
901 |
__ bind(try_eden);
|
|
902 |
// get the instance size
|
|
903 |
__ movl(obj_size, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
904 |
__ eden_allocate(obj, obj_size, 0, t1, slow_path);
|
|
905 |
__ initialize_object(obj, klass, obj_size, 0, t1, t2);
|
|
906 |
__ verify_oop(obj);
|
|
907 |
__ popl(rbx);
|
|
908 |
__ popl(rdi);
|
|
909 |
__ ret(0);
|
|
910 |
|
|
911 |
__ bind(slow_path);
|
|
912 |
__ popl(rbx);
|
|
913 |
__ popl(rdi);
|
|
914 |
}
|
|
915 |
|
|
916 |
__ enter();
|
|
917 |
OopMap* map = save_live_registers(sasm, 2);
|
|
918 |
int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
|
|
919 |
oop_maps = new OopMapSet();
|
|
920 |
oop_maps->add_gc_map(call_offset, map);
|
|
921 |
restore_live_registers_except_rax(sasm);
|
|
922 |
__ verify_oop(obj);
|
|
923 |
__ leave();
|
|
924 |
__ ret(0);
|
|
925 |
|
|
926 |
// rax,: new instance
|
|
927 |
}
|
|
928 |
|
|
929 |
break;
|
|
930 |
|
|
931 |
#ifdef TIERED
|
|
932 |
case counter_overflow_id:
|
|
933 |
{
|
|
934 |
Register bci = rax;
|
|
935 |
__ enter();
|
|
936 |
OopMap* map = save_live_registers(sasm, 2);
|
|
937 |
// Retrieve bci
|
|
938 |
__ movl(bci, Address(rbp, 2*BytesPerWord));
|
|
939 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci);
|
|
940 |
oop_maps = new OopMapSet();
|
|
941 |
oop_maps->add_gc_map(call_offset, map);
|
|
942 |
restore_live_registers(sasm);
|
|
943 |
__ leave();
|
|
944 |
__ ret(0);
|
|
945 |
}
|
|
946 |
break;
|
|
947 |
#endif // TIERED
|
|
948 |
|
|
949 |
case new_type_array_id:
|
|
950 |
case new_object_array_id:
|
|
951 |
{
|
|
952 |
Register length = rbx; // Incoming
|
|
953 |
Register klass = rdx; // Incoming
|
|
954 |
Register obj = rax; // Result
|
|
955 |
|
|
956 |
if (id == new_type_array_id) {
|
|
957 |
__ set_info("new_type_array", dont_gc_arguments);
|
|
958 |
} else {
|
|
959 |
__ set_info("new_object_array", dont_gc_arguments);
|
|
960 |
}
|
|
961 |
|
|
962 |
#ifdef ASSERT
|
|
963 |
// assert object type is really an array of the proper kind
|
|
964 |
{
|
|
965 |
Label ok;
|
|
966 |
Register t0 = obj;
|
|
967 |
__ movl(t0, Address(klass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc)));
|
|
968 |
__ sarl(t0, Klass::_lh_array_tag_shift);
|
|
969 |
int tag = ((id == new_type_array_id)
|
|
970 |
? Klass::_lh_array_tag_type_value
|
|
971 |
: Klass::_lh_array_tag_obj_value);
|
|
972 |
__ cmpl(t0, tag);
|
|
973 |
__ jcc(Assembler::equal, ok);
|
|
974 |
__ stop("assert(is an array klass)");
|
|
975 |
__ should_not_reach_here();
|
|
976 |
__ bind(ok);
|
|
977 |
}
|
|
978 |
#endif // ASSERT
|
|
979 |
|
|
980 |
if (UseTLAB && FastTLABRefill) {
|
|
981 |
Register arr_size = rsi;
|
|
982 |
Register t1 = rcx; // must be rcx for use as shift count
|
|
983 |
Register t2 = rdi;
|
|
984 |
Label slow_path;
|
|
985 |
assert_different_registers(length, klass, obj, arr_size, t1, t2);
|
|
986 |
|
|
987 |
// check that array length is small enough for fast path.
|
|
988 |
__ cmpl(length, C1_MacroAssembler::max_array_allocation_length);
|
|
989 |
__ jcc(Assembler::above, slow_path);
|
|
990 |
|
|
991 |
// if we got here then the TLAB allocation failed, so try
|
|
992 |
// refilling the TLAB or allocating directly from eden.
|
|
993 |
Label retry_tlab, try_eden;
|
|
994 |
__ tlab_refill(retry_tlab, try_eden, slow_path); // preserves rbx, & rdx
|
|
995 |
|
|
996 |
__ bind(retry_tlab);
|
|
997 |
|
|
998 |
// get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
|
|
999 |
__ movl(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
1000 |
__ movl(arr_size, length);
|
|
1001 |
assert(t1 == rcx, "fixed register usage");
|
|
1002 |
__ shll(arr_size /* by t1=rcx, mod 32 */);
|
|
1003 |
__ shrl(t1, Klass::_lh_header_size_shift);
|
|
1004 |
__ andl(t1, Klass::_lh_header_size_mask);
|
|
1005 |
__ addl(arr_size, t1);
|
|
1006 |
__ addl(arr_size, MinObjAlignmentInBytesMask); // align up
|
|
1007 |
__ andl(arr_size, ~MinObjAlignmentInBytesMask);
|
|
1008 |
|
|
1009 |
__ tlab_allocate(obj, arr_size, 0, t1, t2, slow_path); // preserves arr_size
|
|
1010 |
|
|
1011 |
__ initialize_header(obj, klass, length, t1, t2);
|
|
1012 |
__ movb(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes() + (Klass::_lh_header_size_shift / BitsPerByte)));
|
|
1013 |
assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
|
|
1014 |
assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
|
|
1015 |
__ andl(t1, Klass::_lh_header_size_mask);
|
|
1016 |
__ subl(arr_size, t1); // body length
|
|
1017 |
__ addl(t1, obj); // body start
|
|
1018 |
__ initialize_body(t1, arr_size, 0, t2);
|
|
1019 |
__ verify_oop(obj);
|
|
1020 |
__ ret(0);
|
|
1021 |
|
|
1022 |
__ bind(try_eden);
|
|
1023 |
// get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
|
|
1024 |
__ movl(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes()));
|
|
1025 |
__ movl(arr_size, length);
|
|
1026 |
assert(t1 == rcx, "fixed register usage");
|
|
1027 |
__ shll(arr_size /* by t1=rcx, mod 32 */);
|
|
1028 |
__ shrl(t1, Klass::_lh_header_size_shift);
|
|
1029 |
__ andl(t1, Klass::_lh_header_size_mask);
|
|
1030 |
__ addl(arr_size, t1);
|
|
1031 |
__ addl(arr_size, MinObjAlignmentInBytesMask); // align up
|
|
1032 |
__ andl(arr_size, ~MinObjAlignmentInBytesMask);
|
|
1033 |
|
|
1034 |
__ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size
|
|
1035 |
|
|
1036 |
__ initialize_header(obj, klass, length, t1, t2);
|
|
1037 |
__ movb(t1, Address(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes() + (Klass::_lh_header_size_shift / BitsPerByte)));
|
|
1038 |
assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
|
|
1039 |
assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
|
|
1040 |
__ andl(t1, Klass::_lh_header_size_mask);
|
|
1041 |
__ subl(arr_size, t1); // body length
|
|
1042 |
__ addl(t1, obj); // body start
|
|
1043 |
__ initialize_body(t1, arr_size, 0, t2);
|
|
1044 |
__ verify_oop(obj);
|
|
1045 |
__ ret(0);
|
|
1046 |
|
|
1047 |
__ bind(slow_path);
|
|
1048 |
}
|
|
1049 |
|
|
1050 |
__ enter();
|
|
1051 |
OopMap* map = save_live_registers(sasm, 3);
|
|
1052 |
int call_offset;
|
|
1053 |
if (id == new_type_array_id) {
|
|
1054 |
call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
|
|
1055 |
} else {
|
|
1056 |
call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
|
|
1057 |
}
|
|
1058 |
|
|
1059 |
oop_maps = new OopMapSet();
|
|
1060 |
oop_maps->add_gc_map(call_offset, map);
|
|
1061 |
restore_live_registers_except_rax(sasm);
|
|
1062 |
|
|
1063 |
__ verify_oop(obj);
|
|
1064 |
__ leave();
|
|
1065 |
__ ret(0);
|
|
1066 |
|
|
1067 |
// rax,: new array
|
|
1068 |
}
|
|
1069 |
break;
|
|
1070 |
|
|
1071 |
case new_multi_array_id:
|
|
1072 |
{ StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
|
|
1073 |
// rax,: klass
|
|
1074 |
// rbx,: rank
|
|
1075 |
// rcx: address of 1st dimension
|
|
1076 |
OopMap* map = save_live_registers(sasm, 4);
|
|
1077 |
int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, new_multi_array), rax, rbx, rcx);
|
|
1078 |
|
|
1079 |
oop_maps = new OopMapSet();
|
|
1080 |
oop_maps->add_gc_map(call_offset, map);
|
|
1081 |
restore_live_registers_except_rax(sasm);
|
|
1082 |
|
|
1083 |
// rax,: new multi array
|
|
1084 |
__ verify_oop(rax);
|
|
1085 |
}
|
|
1086 |
break;
|
|
1087 |
|
|
1088 |
case register_finalizer_id:
|
|
1089 |
{
|
|
1090 |
__ set_info("register_finalizer", dont_gc_arguments);
|
|
1091 |
|
|
1092 |
// The object is passed on the stack and we haven't pushed a
|
|
1093 |
// frame yet so it's one work away from top of stack.
|
|
1094 |
__ movl(rax, Address(rsp, 1 * BytesPerWord));
|
|
1095 |
__ verify_oop(rax);
|
|
1096 |
|
|
1097 |
// load the klass and check the has finalizer flag
|
|
1098 |
Label register_finalizer;
|
|
1099 |
Register t = rsi;
|
|
1100 |
__ movl(t, Address(rax, oopDesc::klass_offset_in_bytes()));
|
|
1101 |
__ movl(t, Address(t, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc)));
|
|
1102 |
__ testl(t, JVM_ACC_HAS_FINALIZER);
|
|
1103 |
__ jcc(Assembler::notZero, register_finalizer);
|
|
1104 |
__ ret(0);
|
|
1105 |
|
|
1106 |
__ bind(register_finalizer);
|
|
1107 |
__ enter();
|
|
1108 |
OopMap* oop_map = save_live_registers(sasm, 2 /*num_rt_args */);
|
|
1109 |
int call_offset = __ call_RT(noreg, noreg,
|
|
1110 |
CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), rax);
|
|
1111 |
oop_maps = new OopMapSet();
|
|
1112 |
oop_maps->add_gc_map(call_offset, oop_map);
|
|
1113 |
|
|
1114 |
// Now restore all the live registers
|
|
1115 |
restore_live_registers(sasm);
|
|
1116 |
|
|
1117 |
__ leave();
|
|
1118 |
__ ret(0);
|
|
1119 |
}
|
|
1120 |
break;
|
|
1121 |
|
|
1122 |
case throw_range_check_failed_id:
|
|
1123 |
{ StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
|
|
1124 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
|
|
1125 |
}
|
|
1126 |
break;
|
|
1127 |
|
|
1128 |
case throw_index_exception_id:
|
|
1129 |
{ StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
|
|
1130 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
|
|
1131 |
}
|
|
1132 |
break;
|
|
1133 |
|
|
1134 |
case throw_div0_exception_id:
|
|
1135 |
{ StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
|
|
1136 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
|
|
1137 |
}
|
|
1138 |
break;
|
|
1139 |
|
|
1140 |
case throw_null_pointer_exception_id:
|
|
1141 |
{ StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
|
|
1142 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
|
|
1143 |
}
|
|
1144 |
break;
|
|
1145 |
|
|
1146 |
case handle_exception_nofpu_id:
|
|
1147 |
save_fpu_registers = false;
|
|
1148 |
// fall through
|
|
1149 |
case handle_exception_id:
|
|
1150 |
{ StubFrame f(sasm, "handle_exception", dont_gc_arguments);
|
|
1151 |
oop_maps = new OopMapSet();
|
|
1152 |
OopMap* oop_map = save_live_registers(sasm, 1, save_fpu_registers);
|
|
1153 |
generate_handle_exception(sasm, oop_maps, oop_map, save_fpu_registers);
|
|
1154 |
}
|
|
1155 |
break;
|
|
1156 |
|
|
1157 |
case unwind_exception_id:
|
|
1158 |
{ __ set_info("unwind_exception", dont_gc_arguments);
|
|
1159 |
// note: no stubframe since we are about to leave the current
|
|
1160 |
// activation and we are calling a leaf VM function only.
|
|
1161 |
generate_unwind_exception(sasm);
|
|
1162 |
}
|
|
1163 |
break;
|
|
1164 |
|
|
1165 |
case throw_array_store_exception_id:
|
|
1166 |
{ StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
|
|
1167 |
// tos + 0: link
|
|
1168 |
// + 1: return address
|
|
1169 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), false);
|
|
1170 |
}
|
|
1171 |
break;
|
|
1172 |
|
|
1173 |
case throw_class_cast_exception_id:
|
|
1174 |
{ StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
|
|
1175 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
|
|
1176 |
}
|
|
1177 |
break;
|
|
1178 |
|
|
1179 |
case throw_incompatible_class_change_error_id:
|
|
1180 |
{ StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
|
|
1181 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
|
|
1182 |
}
|
|
1183 |
break;
|
|
1184 |
|
|
1185 |
case slow_subtype_check_id:
|
|
1186 |
{
|
|
1187 |
enum layout {
|
|
1188 |
rax_off,
|
|
1189 |
rcx_off,
|
|
1190 |
rsi_off,
|
|
1191 |
rdi_off,
|
|
1192 |
saved_rbp_off,
|
|
1193 |
return_off,
|
|
1194 |
sub_off,
|
|
1195 |
super_off,
|
|
1196 |
framesize
|
|
1197 |
};
|
|
1198 |
|
|
1199 |
__ set_info("slow_subtype_check", dont_gc_arguments);
|
|
1200 |
__ pushl(rdi);
|
|
1201 |
__ pushl(rsi);
|
|
1202 |
__ pushl(rcx);
|
|
1203 |
__ pushl(rax);
|
|
1204 |
__ movl(rsi, Address(rsp, (super_off - 1) * BytesPerWord)); // super
|
|
1205 |
__ movl(rax, Address(rsp, (sub_off - 1) * BytesPerWord)); // sub
|
|
1206 |
|
|
1207 |
__ movl(rdi,Address(rsi,sizeof(oopDesc) + Klass::secondary_supers_offset_in_bytes()));
|
|
1208 |
__ movl(rcx,Address(rdi,arrayOopDesc::length_offset_in_bytes()));
|
|
1209 |
__ addl(rdi,arrayOopDesc::base_offset_in_bytes(T_OBJECT));
|
|
1210 |
|
|
1211 |
Label miss;
|
|
1212 |
__ repne_scan();
|
|
1213 |
__ jcc(Assembler::notEqual, miss);
|
|
1214 |
__ movl(Address(rsi,sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes()), rax);
|
|
1215 |
__ movl(Address(rsp, (super_off - 1) * BytesPerWord), 1); // result
|
|
1216 |
__ popl(rax);
|
|
1217 |
__ popl(rcx);
|
|
1218 |
__ popl(rsi);
|
|
1219 |
__ popl(rdi);
|
|
1220 |
__ ret(0);
|
|
1221 |
|
|
1222 |
__ bind(miss);
|
|
1223 |
__ movl(Address(rsp, (super_off - 1) * BytesPerWord), 0); // result
|
|
1224 |
__ popl(rax);
|
|
1225 |
__ popl(rcx);
|
|
1226 |
__ popl(rsi);
|
|
1227 |
__ popl(rdi);
|
|
1228 |
__ ret(0);
|
|
1229 |
}
|
|
1230 |
break;
|
|
1231 |
|
|
1232 |
case monitorenter_nofpu_id:
|
|
1233 |
save_fpu_registers = false;
|
|
1234 |
// fall through
|
|
1235 |
case monitorenter_id:
|
|
1236 |
{
|
|
1237 |
StubFrame f(sasm, "monitorenter", dont_gc_arguments);
|
|
1238 |
OopMap* map = save_live_registers(sasm, 3, save_fpu_registers);
|
|
1239 |
|
|
1240 |
f.load_argument(1, rax); // rax,: object
|
|
1241 |
f.load_argument(0, rbx); // rbx,: lock address
|
|
1242 |
|
|
1243 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), rax, rbx);
|
|
1244 |
|
|
1245 |
oop_maps = new OopMapSet();
|
|
1246 |
oop_maps->add_gc_map(call_offset, map);
|
|
1247 |
restore_live_registers(sasm, save_fpu_registers);
|
|
1248 |
}
|
|
1249 |
break;
|
|
1250 |
|
|
1251 |
case monitorexit_nofpu_id:
|
|
1252 |
save_fpu_registers = false;
|
|
1253 |
// fall through
|
|
1254 |
case monitorexit_id:
|
|
1255 |
{
|
|
1256 |
StubFrame f(sasm, "monitorexit", dont_gc_arguments);
|
|
1257 |
OopMap* map = save_live_registers(sasm, 2, save_fpu_registers);
|
|
1258 |
|
|
1259 |
f.load_argument(0, rax); // rax,: lock address
|
|
1260 |
|
|
1261 |
// note: really a leaf routine but must setup last java sp
|
|
1262 |
// => use call_RT for now (speed can be improved by
|
|
1263 |
// doing last java sp setup manually)
|
|
1264 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), rax);
|
|
1265 |
|
|
1266 |
oop_maps = new OopMapSet();
|
|
1267 |
oop_maps->add_gc_map(call_offset, map);
|
|
1268 |
restore_live_registers(sasm, save_fpu_registers);
|
|
1269 |
|
|
1270 |
}
|
|
1271 |
break;
|
|
1272 |
|
|
1273 |
case access_field_patching_id:
|
|
1274 |
{ StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
|
|
1275 |
// we should set up register map
|
|
1276 |
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
|
|
1277 |
}
|
|
1278 |
break;
|
|
1279 |
|
|
1280 |
case load_klass_patching_id:
|
|
1281 |
{ StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
|
|
1282 |
// we should set up register map
|
|
1283 |
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
|
|
1284 |
}
|
|
1285 |
break;
|
|
1286 |
|
|
1287 |
case jvmti_exception_throw_id:
|
|
1288 |
{ // rax,: exception oop
|
|
1289 |
StubFrame f(sasm, "jvmti_exception_throw", dont_gc_arguments);
|
|
1290 |
// Preserve all registers across this potentially blocking call
|
|
1291 |
const int num_rt_args = 2; // thread, exception oop
|
|
1292 |
OopMap* map = save_live_registers(sasm, num_rt_args);
|
|
1293 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, Runtime1::post_jvmti_exception_throw), rax);
|
|
1294 |
oop_maps = new OopMapSet();
|
|
1295 |
oop_maps->add_gc_map(call_offset, map);
|
|
1296 |
restore_live_registers(sasm);
|
|
1297 |
}
|
|
1298 |
break;
|
|
1299 |
|
|
1300 |
case dtrace_object_alloc_id:
|
|
1301 |
{ // rax,: object
|
|
1302 |
StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
|
|
1303 |
// we can't gc here so skip the oopmap but make sure that all
|
|
1304 |
// the live registers get saved.
|
|
1305 |
save_live_registers(sasm, 1);
|
|
1306 |
|
|
1307 |
__ pushl(rax);
|
|
1308 |
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc)));
|
|
1309 |
__ popl(rax);
|
|
1310 |
|
|
1311 |
restore_live_registers(sasm);
|
|
1312 |
}
|
|
1313 |
break;
|
|
1314 |
|
|
1315 |
case fpu2long_stub_id:
|
|
1316 |
{
|
|
1317 |
// rax, and rdx are destroyed, but should be free since the result is returned there
|
|
1318 |
// preserve rsi,ecx
|
|
1319 |
__ pushl(rsi);
|
|
1320 |
__ pushl(rcx);
|
|
1321 |
|
|
1322 |
// check for NaN
|
|
1323 |
Label return0, do_return, return_min_jlong, do_convert;
|
|
1324 |
|
|
1325 |
Address value_high_word(rsp, 8);
|
|
1326 |
Address value_low_word(rsp, 4);
|
|
1327 |
Address result_high_word(rsp, 16);
|
|
1328 |
Address result_low_word(rsp, 12);
|
|
1329 |
|
|
1330 |
__ subl(rsp, 20);
|
|
1331 |
__ fst_d(value_low_word);
|
|
1332 |
__ movl(rax, value_high_word);
|
|
1333 |
__ andl(rax, 0x7ff00000);
|
|
1334 |
__ cmpl(rax, 0x7ff00000);
|
|
1335 |
__ jcc(Assembler::notEqual, do_convert);
|
|
1336 |
__ movl(rax, value_high_word);
|
|
1337 |
__ andl(rax, 0xfffff);
|
|
1338 |
__ orl(rax, value_low_word);
|
|
1339 |
__ jcc(Assembler::notZero, return0);
|
|
1340 |
|
|
1341 |
__ bind(do_convert);
|
|
1342 |
__ fnstcw(Address(rsp, 0));
|
|
1343 |
__ movzxw(rax, Address(rsp, 0));
|
|
1344 |
__ orl(rax, 0xc00);
|
|
1345 |
__ movw(Address(rsp, 2), rax);
|
|
1346 |
__ fldcw(Address(rsp, 2));
|
|
1347 |
__ fwait();
|
|
1348 |
__ fistp_d(result_low_word);
|
|
1349 |
__ fldcw(Address(rsp, 0));
|
|
1350 |
__ fwait();
|
|
1351 |
__ movl(rax, result_low_word);
|
|
1352 |
__ movl(rdx, result_high_word);
|
|
1353 |
__ movl(rcx, rax);
|
|
1354 |
// What the heck is the point of the next instruction???
|
|
1355 |
__ xorl(rcx, 0x0);
|
|
1356 |
__ movl(rsi, 0x80000000);
|
|
1357 |
__ xorl(rsi, rdx);
|
|
1358 |
__ orl(rcx, rsi);
|
|
1359 |
__ jcc(Assembler::notEqual, do_return);
|
|
1360 |
__ fldz();
|
|
1361 |
__ fcomp_d(value_low_word);
|
|
1362 |
__ fnstsw_ax();
|
|
1363 |
__ sahf();
|
|
1364 |
__ jcc(Assembler::above, return_min_jlong);
|
|
1365 |
// return max_jlong
|
|
1366 |
__ movl(rdx, 0x7fffffff);
|
|
1367 |
__ movl(rax, 0xffffffff);
|
|
1368 |
__ jmp(do_return);
|
|
1369 |
|
|
1370 |
__ bind(return_min_jlong);
|
|
1371 |
__ movl(rdx, 0x80000000);
|
|
1372 |
__ xorl(rax, rax);
|
|
1373 |
__ jmp(do_return);
|
|
1374 |
|
|
1375 |
__ bind(return0);
|
|
1376 |
__ fpop();
|
|
1377 |
__ xorl(rdx,rdx);
|
|
1378 |
__ xorl(rax,rax);
|
|
1379 |
|
|
1380 |
__ bind(do_return);
|
|
1381 |
__ addl(rsp, 20);
|
|
1382 |
__ popl(rcx);
|
|
1383 |
__ popl(rsi);
|
|
1384 |
__ ret(0);
|
|
1385 |
}
|
|
1386 |
break;
|
|
1387 |
|
|
1388 |
default:
|
|
1389 |
{ StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
|
|
1390 |
__ movl(rax, (int)id);
|
|
1391 |
__ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), rax);
|
|
1392 |
__ should_not_reach_here();
|
|
1393 |
}
|
|
1394 |
break;
|
|
1395 |
}
|
|
1396 |
return oop_maps;
|
|
1397 |
}
|
|
1398 |
|
|
1399 |
#undef __
|