Mercurial > hg > truffle
view src/os_cpu/linux_x86/vm/assembler_linux_x86_64.cpp @ 225:286bee59f34b
Merge
author | trims |
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date | Fri, 27 Jun 2008 19:12:11 -0700 |
parents | 7793bd37a336 |
children | d1605aabd0a1 |
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/* * 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); } } bool MacroAssembler::needs_explicit_null_check(intptr_t offset) { // Exception handler checks the nmethod's implicit null checks table // only when this method returns false. if (UseCompressedOops) { // The first page after heap_base is unmapped and // the 'offset' is equal to [heap_base + offset] for // narrow oop implicit null checks. uintptr_t heap_base = (uintptr_t)Universe::heap_base(); if ((uintptr_t)offset >= heap_base) { // Normalize offset for the next check. offset = (intptr_t)(pointer_delta((void*)offset, (void*)heap_base, 1)); } } // Linux kernel guarantees that the first page is always unmapped. Don't // assume anything more than that. bool offset_in_first_page = 0 <= offset && offset < os::vm_page_size(); return !offset_in_first_page; }