/*

 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

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

 *

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

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

 * published by the Free Software Foundation.

 *

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

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

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

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

 * accompanied this code).

 *

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

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

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

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

#include "asm/macroAssembler.hpp"

#include "asm/macroAssembler.inline.hpp"

#include "runtime/os.hpp"

#include "runtime/threadLocalStorage.hpp"

void MacroAssembler::int3() {

  push(rax);

  push(rdx);

  push(rcx);

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

  pop(rcx);

  pop(rdx);

  pop(rax);

}

#define __  _masm->

#ifndef _LP64

static void slow_call_thr_specific(MacroAssembler* _masm, Register thread) {

  // slow call to of thr_getspecific

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

  // Consider using pthread_getspecific instead.

__  push(0);                                                            // allocate space for return value

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

__  push(rcx);                                                          // save caller save

__  push(rdx);                                                          // save caller save

  if (thread != rax) {

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

  } else {

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

  }

__  push(thread);                                                       // and pass the address

__  push(ThreadLocalStorage::thread_index());                           // the key

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

__  increment(rsp, 2 * wordSize);

__  pop(rdx);

__  pop(rcx);

  if (thread != rax) __ pop(rax);

__  pop(thread);

}

#else

static void slow_call_thr_specific(MacroAssembler* _masm, Register thread) {

  // slow call to of thr_getspecific

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

  // Consider using pthread_getspecific instead.

  if (thread != rax) {

__    push(rax);

  }

__  push(0); // space for return value

__  push(rdi);

__  push(rsi);

__  lea(rsi, Address(rsp, 16)); // pass return value address

__  push(rdx);

__  push(rcx);

__  push(r8);

__  push(r9);

__  push(r10);

  // XXX

__  mov(r10, rsp);

__  andptr(rsp, -16);

__  push(r10);

__  push(r11);

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

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

__  pop(r11);

__  pop(rsp);

__  pop(r10);

__  pop(r9);

__  pop(r8);

__  pop(rcx);

__  pop(rdx);

__  pop(rsi);

__  pop(rdi);

__  pop(thread); // load return value

  if (thread != rax) {

__    pop(rax);

  }

}

#endif //LP64

void MacroAssembler::get_thread(Register thread) {

  int segment = NOT_LP64(Assembler::GS_segment) LP64_ONLY(Assembler::FS_segment);

  // 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_int8 (segment);

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

     AddressLiteral null(0, relocInfo::none);

     movptr (thread, null);

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

     return ;

  } else

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

     // mov r, gs:[tlsOffset]

     emit_int8 (segment);

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

     movptr (thread, tls_off);

     return ;

  }

  slow_call_thr_specific(this, thread);

}