hotspot/src/cpu/ppc/vm/nativeInst_ppc.cpp
author mdoerr
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8144019: PPC64 C1: Introduce Client Compiler Reviewed-by: goetz
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/*
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 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
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 * Copyright 2012, 2015 SAP AG. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "asm/macroAssembler.inline.hpp"
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#include "memory/resourceArea.hpp"
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#include "nativeInst_ppc.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/handles.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/stubRoutines.hpp"
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#include "utilities/ostream.hpp"
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#ifdef COMPILER1
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#include "c1/c1_Runtime1.hpp"
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#endif
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// We use an illtrap for marking a method as not_entrant or zombie iff !UseSIGTRAP
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// Work around a C++ compiler bug which changes 'this'
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bool NativeInstruction::is_sigill_zombie_not_entrant_at(address addr) {
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  assert(!UseSIGTRAP, "precondition");
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  if (*(int*)addr != 0 /*illtrap*/) return false;
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  CodeBlob* cb = CodeCache::find_blob_unsafe(addr);
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  if (cb == NULL || !cb->is_nmethod()) return false;
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  nmethod *nm = (nmethod *)cb;
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  // This method is not_entrant or zombie iff the illtrap instruction is
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  // located at the verified entry point.
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  return nm->verified_entry_point() == addr;
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}
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#ifdef ASSERT
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void NativeInstruction::verify() {
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  // Make sure code pattern is actually an instruction address.
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  address addr = addr_at(0);
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  if (addr == 0 || ((intptr_t)addr & 3) != 0) {
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    fatal("not an instruction address");
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  }
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}
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#endif // ASSERT
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// Extract call destination from a NativeCall. The call might use a trampoline stub.
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address NativeCall::destination() const {
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  address addr = (address)this;
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  address destination = Assembler::bxx_destination(addr);
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  // Do we use a trampoline stub for this call?
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  // Trampoline stubs are located behind the main code.
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  if (destination > addr) {
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    // Filter out recursive method invocation (call to verified/unverified entry point).
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    CodeBlob* cb = CodeCache::find_blob_unsafe(addr);   // Else we get assertion if nmethod is zombie.
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    assert(cb && cb->is_nmethod(), "sanity");
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    nmethod *nm = (nmethod *)cb;
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    if (nm->stub_contains(destination) && is_NativeCallTrampolineStub_at(destination)) {
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      // Yes we do, so get the destination from the trampoline stub.
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      const address trampoline_stub_addr = destination;
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      destination = NativeCallTrampolineStub_at(trampoline_stub_addr)->destination(nm);
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    }
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  }
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  return destination;
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}
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// Similar to replace_mt_safe, but just changes the destination. The
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// important thing is that free-running threads are able to execute this
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// call instruction at all times. Thus, the displacement field must be
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// instruction-word-aligned.
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//
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// Used in the runtime linkage of calls; see class CompiledIC.
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//
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// Add parameter assert_lock to switch off assertion
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// during code generation, where no patching lock is needed.
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void NativeCall::set_destination_mt_safe(address dest, bool assert_lock) {
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  assert(!assert_lock ||
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         (Patching_lock->is_locked() || SafepointSynchronize::is_at_safepoint()),
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         "concurrent code patching");
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  ResourceMark rm;
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  int code_size = 1 * BytesPerInstWord;
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  address addr_call = addr_at(0);
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  assert(MacroAssembler::is_bl(*(int*)addr_call), "unexpected code at call-site");
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  CodeBuffer cb(addr_call, code_size + 1);
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  MacroAssembler* a = new MacroAssembler(&cb);
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  // Patch the call.
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  if (!ReoptimizeCallSequences || !a->is_within_range_of_b(dest, addr_call)) {
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    address trampoline_stub_addr = get_trampoline();
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    // We did not find a trampoline stub because the current codeblob
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    // does not provide this information. The branch will be patched
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    // later during a final fixup, when all necessary information is
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    // available.
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    if (trampoline_stub_addr == 0)
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      return;
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    // Patch the constant in the call's trampoline stub.
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    NativeCallTrampolineStub_at(trampoline_stub_addr)->set_destination(dest);
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    dest = trampoline_stub_addr;
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  }
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  OrderAccess::release();
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  a->bl(dest);
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  ICache::ppc64_flush_icache_bytes(addr_call, code_size);
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}
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address NativeCall::get_trampoline() {
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  address call_addr = addr_at(0);
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  CodeBlob *code = CodeCache::find_blob(call_addr);
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  assert(code != NULL, "Could not find the containing code blob");
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  // There are no relocations available when the code gets relocated
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  // because of CodeBuffer expansion.
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  if (code->relocation_size() == 0)
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    return NULL;
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  address bl_destination = Assembler::bxx_destination(call_addr);
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  if (code->content_contains(bl_destination) &&
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      is_NativeCallTrampolineStub_at(bl_destination))
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    return bl_destination;
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  // If the codeBlob is not a nmethod, this is because we get here from the
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  // CodeBlob constructor, which is called within the nmethod constructor.
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  return trampoline_stub_Relocation::get_trampoline_for(call_addr, (nmethod*)code);
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}
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#ifdef ASSERT
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void NativeCall::verify() {
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  address addr = addr_at(0);
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  if (!NativeCall::is_call_at(addr)) {
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    tty->print_cr("not a NativeCall at " PTR_FORMAT, p2i(addr));
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    // TODO: PPC port: Disassembler::decode(addr - 20, addr + 20, tty);
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    fatal("not a NativeCall at " PTR_FORMAT, p2i(addr));
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  }
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}
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#endif // ASSERT
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#ifdef ASSERT
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void NativeFarCall::verify() {
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  address addr = addr_at(0);
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  NativeInstruction::verify();
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  if (!NativeFarCall::is_far_call_at(addr)) {
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    tty->print_cr("not a NativeFarCall at " PTR_FORMAT, p2i(addr));
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    // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty);
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    fatal("not a NativeFarCall at " PTR_FORMAT, p2i(addr));
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  }
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}
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#endif // ASSERT
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address NativeMovConstReg::next_instruction_address() const {
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#ifdef ASSERT
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  CodeBlob* nm = CodeCache::find_blob(instruction_address());
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  assert(!MacroAssembler::is_set_narrow_oop(addr_at(0), nm->content_begin()), "Should not patch narrow oop here");
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#endif
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  if (MacroAssembler::is_load_const_from_method_toc_at(addr_at(0))) {
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    return addr_at(load_const_from_method_toc_instruction_size);
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  } else {
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    return addr_at(load_const_instruction_size);
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  }
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}
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intptr_t NativeMovConstReg::data() const {
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  address   addr = addr_at(0);
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  if (MacroAssembler::is_load_const_at(addr)) {
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    return MacroAssembler::get_const(addr);
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  }
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  CodeBlob* cb = CodeCache::find_blob_unsafe(addr);
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  if (MacroAssembler::is_set_narrow_oop(addr, cb->content_begin())) {
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    narrowOop no = (narrowOop)MacroAssembler::get_narrow_oop(addr, cb->content_begin());
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    return cast_from_oop<intptr_t>(oopDesc::decode_heap_oop(no));
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  } else {
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    assert(MacroAssembler::is_load_const_from_method_toc_at(addr), "must be load_const_from_pool");
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    address ctable = cb->content_begin();
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    int offset = MacroAssembler::get_offset_of_load_const_from_method_toc_at(addr);
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    return *(intptr_t *)(ctable + offset);
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  }
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}
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address NativeMovConstReg::set_data_plain(intptr_t data, CodeBlob *cb) {
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  address addr         = instruction_address();
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  address next_address = NULL;
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  if (!cb) cb = CodeCache::find_blob(addr);
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  if (cb != NULL && MacroAssembler::is_load_const_from_method_toc_at(addr)) {
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    // A load from the method's TOC (ctable).
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    assert(cb->is_nmethod(), "must be nmethod");
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    const address ctable = cb->content_begin();
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    const int toc_offset = MacroAssembler::get_offset_of_load_const_from_method_toc_at(addr);
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    *(intptr_t *)(ctable + toc_offset) = data;
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    next_address = addr + BytesPerInstWord;
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   219
  } else if (cb != NULL &&
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             MacroAssembler::is_calculate_address_from_global_toc_at(addr, cb->content_begin())) {
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    // A calculation relative to the global TOC.
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    if (MacroAssembler::get_address_of_calculate_address_from_global_toc_at(addr, cb->content_begin()) !=
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        (address)data) {
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      const int invalidated_range =
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        MacroAssembler::patch_calculate_address_from_global_toc_at(addr, cb->content_begin(),
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                                                                   (address)data);
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      const address start = invalidated_range < 0 ? addr + invalidated_range : addr;
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      // FIXME:
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      const int range = invalidated_range < 0 ? 4 - invalidated_range : 8;
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      ICache::ppc64_flush_icache_bytes(start, range);
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   231
    }
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    next_address = addr + 1 * BytesPerInstWord;
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   233
  } else if (MacroAssembler::is_load_const_at(addr)) {
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    // A normal 5 instruction load_const code sequence.
22861
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   235
    if (MacroAssembler::get_const(addr) != (long)data) {
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   236
      // This is not mt safe, ok in methods like CodeBuffer::copy_code().
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   237
      MacroAssembler::patch_const(addr, (long)data);
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   238
      ICache::ppc64_flush_icache_bytes(addr, load_const_instruction_size);
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   239
    }
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    next_address = addr + 5 * BytesPerInstWord;
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   241
  } else if (MacroAssembler::is_bl(* (int*) addr)) {
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   242
    // A single branch-and-link instruction.
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   243
    ResourceMark rm;
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   244
    const int code_size = 1 * BytesPerInstWord;
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   245
    CodeBuffer cb(addr, code_size + 1);
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   246
    MacroAssembler* a = new MacroAssembler(&cb);
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   247
    a->bl((address) data);
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    ICache::ppc64_flush_icache_bytes(addr, code_size);
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    next_address = addr + code_size;
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   250
  } else {
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   251
    ShouldNotReachHere();
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   252
  }
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   253
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  return next_address;
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   255
}
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   256
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void NativeMovConstReg::set_data(intptr_t data) {
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   258
  // Store the value into the instruction stream.
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  CodeBlob *cb = CodeCache::find_blob(instruction_address());
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  address next_address = set_data_plain(data, cb);
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   261
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  // Also store the value into an oop_Relocation cell, if any.
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   263
  if (cb && cb->is_nmethod()) {
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   264
    RelocIterator iter((nmethod *) cb, instruction_address(), next_address);
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   265
    oop* oop_addr = NULL;
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   266
    Metadata** metadata_addr = NULL;
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   267
    while (iter.next()) {
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   268
      if (iter.type() == relocInfo::oop_type) {
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   269
        oop_Relocation *r = iter.oop_reloc();
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   270
        if (oop_addr == NULL) {
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          oop_addr = r->oop_addr();
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          *oop_addr = cast_to_oop(data);
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   273
        } else {
35085
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          assert(oop_addr == r->oop_addr(), "must be only one set-oop here");
22824
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        }
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   276
      }
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   277
      if (iter.type() == relocInfo::metadata_type) {
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   278
        metadata_Relocation *r = iter.metadata_reloc();
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   279
        if (metadata_addr == NULL) {
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          metadata_addr = r->metadata_addr();
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          *metadata_addr = (Metadata*)data;
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        } else {
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          assert(metadata_addr == r->metadata_addr(), "must be only one set-metadata here");
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        }
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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      }
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    }
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  }
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}
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   289
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   290
void NativeMovConstReg::set_narrow_oop(narrowOop data, CodeBlob *code /* = NULL */) {
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  address   addr = addr_at(0);
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   292
  CodeBlob* cb = (code) ? code : CodeCache::find_blob(instruction_address());
22861
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   293
  if (MacroAssembler::get_narrow_oop(addr, cb->content_begin()) == (long)data) return;
22824
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  const int invalidated_range =
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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    MacroAssembler::patch_set_narrow_oop(addr, cb->content_begin(), (long)data);
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   296
  const address start = invalidated_range < 0 ? addr + invalidated_range : addr;
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   297
  // FIXME:
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   298
  const int range = invalidated_range < 0 ? 4 - invalidated_range : 8;
22861
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   299
  ICache::ppc64_flush_icache_bytes(start, range);
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}
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28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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// Do not use an assertion here. Let clients decide whether they only
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// want this when assertions are enabled.
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#ifdef ASSERT
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void NativeMovConstReg::verify() {
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   306
  address   addr = addr_at(0);
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   307
  if (! MacroAssembler::is_load_const_at(addr) &&
22861
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   308
      ! MacroAssembler::is_load_const_from_method_toc_at(addr)) {
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   309
    CodeBlob* cb = CodeCache::find_blob_unsafe(addr);   // find_nmethod() asserts if nmethod is zombie.
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   310
    if (! (cb != NULL && MacroAssembler::is_calculate_address_from_global_toc_at(addr, cb->content_begin())) &&
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   311
        ! (cb != NULL && MacroAssembler::is_set_narrow_oop(addr, cb->content_begin())) &&
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   312
        ! MacroAssembler::is_bl(*((int*) addr))) {
25374
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coleenp
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   313
      tty->print_cr("not a NativeMovConstReg at " PTR_FORMAT, p2i(addr));
22861
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   314
      // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty);
33105
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   315
      fatal("not a NativeMovConstReg at " PTR_FORMAT, p2i(addr));
22861
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   316
    }
22824
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  }
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   318
}
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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#endif // ASSERT
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   320
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   321
void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   322
  ResourceMark rm;
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   323
  int code_size = 1 * BytesPerInstWord;
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   324
  CodeBuffer cb(verified_entry, code_size + 1);
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   325
  MacroAssembler* a = new MacroAssembler(&cb);
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   326
#ifdef COMPILER2
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   327
  assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "expected fixed destination of patch");
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diff changeset
   328
#endif
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   329
  // Patch this nmethod atomically. Always use illtrap/trap in debug build.
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   330
  if (DEBUG_ONLY(false &&) a->is_within_range_of_b(dest, a->pc())) {
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diff changeset
   331
    a->b(dest);
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
   332
  } else {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
   333
    // The signal handler will continue at dest=OptoRuntime::handle_wrong_method_stub().
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   334
    if (TrapBasedNotEntrantChecks) {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   335
      // We use a special trap for marking a method as not_entrant or zombie.
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   336
      a->trap_zombie_not_entrant();
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
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diff changeset
   337
    } else {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   338
      // We use an illtrap for marking a method as not_entrant or zombie.
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
   339
      a->illtrap();
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
   340
    }
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   341
  }
22861
f5c393d456fc 8029940: PPC64 (part 122): C2 compiler port
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   342
  ICache::ppc64_flush_icache_bytes(verified_entry, code_size);
22824
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   343
}
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   344
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   345
#ifdef ASSERT
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   346
void NativeJump::verify() {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   347
  address addr = addr_at(0);
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   348
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   349
  NativeInstruction::verify();
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   350
  if (!NativeJump::is_jump_at(addr)) {
25374
d7fb2af5d53c 8048169: Change 8037816 breaks HS build on PPC64 and CPP-Interpreter platforms
coleenp
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   351
    tty->print_cr("not a NativeJump at " PTR_FORMAT, p2i(addr));
22824
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   352
    // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty);
33105
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   353
    fatal("not a NativeJump at " PTR_FORMAT, p2i(addr));
22824
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   354
  }
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   355
}
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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   356
#endif // ASSERT
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
   357
35085
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
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diff changeset
   358
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
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diff changeset
   359
void NativeGeneralJump::insert_unconditional(address code_pos, address entry) {
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   360
  CodeBuffer cb(code_pos, BytesPerInstWord + 1);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   361
  MacroAssembler* a = new MacroAssembler(&cb);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   362
  a->b(entry);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   363
  ICache::ppc64_flush_icache_bytes(code_pos, NativeGeneralJump::instruction_size);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   364
}
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   365
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   366
// MT-safe patching of a jmp instruction.
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
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diff changeset
   367
void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   368
  // Bytes beyond offset NativeGeneralJump::instruction_size are copied by caller.
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   369
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
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diff changeset
   370
  // Finally patch out the jump.
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
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diff changeset
   371
  volatile juint *jump_addr = (volatile juint*)instr_addr;
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   372
  // Release not needed because caller uses invalidate_range after copying the remaining bytes.
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   373
  //OrderAccess::release_store(jump_addr, *((juint*)code_buffer));
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   374
  *jump_addr = *((juint*)code_buffer); // atomically store code over branch instruction
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   375
  ICache::ppc64_flush_icache_bytes(instr_addr, NativeGeneralJump::instruction_size);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   376
}
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   377
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   378
22824
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diff changeset
   379
//-------------------------------------------------------------------
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   380
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   381
// Call trampoline stubs.
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   382
//
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   383
// Layout and instructions of a call trampoline stub:
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   384
//    0:  load the TOC (part 1)
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   385
//    4:  load the TOC (part 2)
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   386
//    8:  load the call target from the constant pool (part 1)
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   387
//  [12:  load the call target from the constant pool (part 2, optional)]
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   388
//   ..:  branch via CTR
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   389
//
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   390
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   391
address NativeCallTrampolineStub::encoded_destination_addr() const {
35085
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   392
  address instruction_addr = addr_at(0 * BytesPerInstWord);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   393
  if (!MacroAssembler::is_ld_largeoffset(instruction_addr)) {
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   394
    instruction_addr = addr_at(2 * BytesPerInstWord);
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   395
    assert(MacroAssembler::is_ld_largeoffset(instruction_addr),
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   396
           "must be a ld with large offset (from the constant pool)");
839c8ba29724 8144019: PPC64 C1: Introduce Client Compiler
mdoerr
parents: 33105
diff changeset
   397
  }
22824
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   398
  return instruction_addr;
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   399
}
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   400
22867
309bcf262a19 8031319: PPC64: Some fixes in ppc and aix coding.
goetz
parents: 22861
diff changeset
   401
address NativeCallTrampolineStub::destination(nmethod *nm) const {
309bcf262a19 8031319: PPC64: Some fixes in ppc and aix coding.
goetz
parents: 22861
diff changeset
   402
  CodeBlob* cb = nm ? nm : CodeCache::find_blob_unsafe(addr_at(0));
22824
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   403
  address ctable = cb->content_begin();
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   404
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   405
  return *(address*)(ctable + destination_toc_offset());
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   406
}
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   407
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   408
int NativeCallTrampolineStub::destination_toc_offset() const {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   409
  return MacroAssembler::get_ld_largeoffset_offset(encoded_destination_addr());
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   410
}
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   411
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   412
void NativeCallTrampolineStub::set_destination(address new_destination) {
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   413
  CodeBlob* cb = CodeCache::find_blob(addr_at(0));
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   414
  address ctable = cb->content_begin();
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   415
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   416
  *(address*)(ctable + destination_toc_offset()) = new_destination;
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   417
}
28258dd5cb2e 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
   418