/*

 * Copyright 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_linux_x86_64.cpp.incl"

void MacroAssembler::int3() {

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

}

void MacroAssembler::get_thread(Register thread) {

  // call pthread_getspecific

  // void * pthread_getspecific(pthread_key_t key);

   if (thread != rax) {

     pushq(rax);

   }

   pushq(rdi);

   pushq(rsi);

   pushq(rdx);

   pushq(rcx);

   pushq(r8);

   pushq(r9);

   pushq(r10);

   // XXX

   movq(r10, rsp);

   andq(rsp, -16);

   pushq(r10);

   pushq(r11);

   movl(rdi, ThreadLocalStorage::thread_index());

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

   popq(r11);

   popq(rsp);

   popq(r10);

   popq(r9);

   popq(r8);

   popq(rcx);

   popq(rdx);

   popq(rsi);

   popq(rdi);

   if (thread != rax) {

       movq(thread, rax);

       popq(rax);

   }

}

// NOTE: since the linux kernel resides at the low end of

// user address space, no null pointer check is needed.

bool MacroAssembler::needs_explicit_null_check(int offset) {

  return offset < 0 || offset >= 0x100000;

}