/*

 * Copyright 1999-2003 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

#include "incls/_precompiled.incl"

#include "incls/_assembler_solaris_x86_32.cpp.incl"

void MacroAssembler::int3() {

  pushl(rax);

  pushl(rdx);

  pushl(rcx);

  call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));

  popl(rcx);

  popl(rdx);

  popl(rax);

}

void MacroAssembler::get_thread(Register thread) {

  // Try to emit a Solaris-specific fast TSD/TLS accessor.

  ThreadLocalStorage::pd_tlsAccessMode tlsMode = ThreadLocalStorage::pd_getTlsAccessMode () ;

  if (tlsMode == ThreadLocalStorage::pd_tlsAccessIndirect) {            // T1

     // Use thread as a temporary: mov r, gs:[0]; mov r, [r+tlsOffset]

     emit_byte (Assembler::GS_segment) ;

     // ExternalAddress doesn't work because it can't take NULL

     AddressLiteral null(0, relocInfo::none);

     movptr (thread, null);

     movl (thread, Address(thread, ThreadLocalStorage::pd_getTlsOffset())) ;

     return ;

  } else

  if (tlsMode == ThreadLocalStorage::pd_tlsAccessDirect) {              // T2

     // mov r, gs:[tlsOffset]

     emit_byte (Assembler::GS_segment) ;

     AddressLiteral tls((address)ThreadLocalStorage::pd_getTlsOffset(), relocInfo::none);

     movptr (thread, tls);

     return ;

  }

  // slow call to of thr_getspecific

  // int thr_getspecific(thread_key_t key, void **value);

  // Consider using pthread_getspecific instead.

  pushl(0);                                                             // allocate space for return value

  if (thread != rax) pushl(rax);                                        // save rax, if caller still wants it

  pushl(rcx);                                                           // save caller save

  pushl(rdx);                                                           // save caller save

  if (thread != rax) {

    leal(thread, Address(rsp, 3 * sizeof(int)));                        // address of return value

  } else {

    leal(thread, Address(rsp, 2 * sizeof(int)));                        // address of return value

  }

  pushl(thread);                                                        // and pass the address

  pushl(ThreadLocalStorage::thread_index());                            // the key

  call(RuntimeAddress(CAST_FROM_FN_PTR(address, thr_getspecific)));

  increment(rsp, 2 * wordSize);

  popl(rdx);

  popl(rcx);

  if (thread != rax) popl(rax);

  popl(thread);

}

bool MacroAssembler::needs_explicit_null_check(int offset) {

  // Identical to Sparc/Solaris code

  bool offset_in_first_page =   0 <= offset  &&  offset < os::vm_page_size();

  return !offset_in_first_page;

}