1 /*
   2  * Copyright 2004-2005 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 #include "incls/_precompiled.incl"
  26 #include "incls/_assembler_solaris_x86_64.cpp.incl"
  27 
  28 void MacroAssembler::int3() {
  29   call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
  30 }
  31 
  32 void MacroAssembler::get_thread(Register thread) {
  33   // Try to emit a Solaris-specific fast TSD/TLS accessor.
  34   ThreadLocalStorage::pd_tlsAccessMode tlsMode = ThreadLocalStorage::pd_getTlsAccessMode();
  35   if (tlsMode == ThreadLocalStorage::pd_tlsAccessIndirect) {            // T1
  36     // Use thread as a temporary: mov r, fs:[0]; mov r, [r+tlsOffset]
  37     emit_byte(Assembler::FS_segment);
  38     movq(thread, Address(NULL, relocInfo::none));
  39     movq(thread, Address(thread, ThreadLocalStorage::pd_getTlsOffset()));
  40     return;
  41   } else if (tlsMode == ThreadLocalStorage::pd_tlsAccessDirect) {       // T2
  42     // mov r, fs:[tlsOffset]
  43     emit_byte(Assembler::FS_segment);
  44     ExternalAddress tls_off((address) ThreadLocalStorage::pd_getTlsOffset());
  45     movptr(thread, tls_off);
  46     return;
  47   }
  48 
  49   // slow call to of thr_getspecific
  50   // int thr_getspecific(thread_key_t key, void **value);
  51   // Consider using pthread_getspecific instead.
  52 
  53   if (thread != rax) {
  54     pushq(rax);
  55   }
  56   pushq(0); // space for return value
  57   pushq(rdi);
  58   pushq(rsi);
  59   leaq(rsi, Address(rsp, 16)); // pass return value address
  60   pushq(rdx);
  61   pushq(rcx);
  62   pushq(r8);
  63   pushq(r9);
  64   pushq(r10);
  65   // XXX
  66   movq(r10, rsp);
  67   andq(rsp, -16);
  68   pushq(r10);
  69   pushq(r11);
  70 
  71   movl(rdi, ThreadLocalStorage::thread_index());
  72   call(RuntimeAddress(CAST_FROM_FN_PTR(address, thr_getspecific)));
  73 
  74   popq(r11);
  75   popq(rsp);
  76   popq(r10);
  77   popq(r9);
  78   popq(r8);
  79   popq(rcx);
  80   popq(rdx);
  81   popq(rsi);
  82   popq(rdi);
  83   popq(thread); // load return value
  84   if (thread != rax) {
  85     popq(rax);
  86   }
  87 }
  88 
  89 bool MacroAssembler::needs_explicit_null_check(int offset) {
  90   // Identical to Sparc/Solaris code
  91   bool offset_in_first_page = 0 <= offset && offset < os::vm_page_size();
  92   return !offset_in_first_page;
  93 }