annotate src/os_cpu/linux_sparc/vm/thread_linux_sparc.hpp @ 122:435e64505015

6693457: Open-source hotspot linux-sparc support Summary: Move os_cpu/linux_sparc from closed to open Reviewed-by: kamg
author phh
date Thu, 24 Apr 2008 15:07:57 -0400
parents
children d1605aabd0a1
rev   line source
phh@122 1 /*
phh@122 2 * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved.
phh@122 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
phh@122 4 *
phh@122 5 * This code is free software; you can redistribute it and/or modify it
phh@122 6 * under the terms of the GNU General Public License version 2 only, as
phh@122 7 * published by the Free Software Foundation.
phh@122 8 *
phh@122 9 * This code is distributed in the hope that it will be useful, but WITHOUT
phh@122 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
phh@122 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
phh@122 12 * version 2 for more details (a copy is included in the LICENSE file that
phh@122 13 * accompanied this code).
phh@122 14 *
phh@122 15 * You should have received a copy of the GNU General Public License version
phh@122 16 * 2 along with this work; if not, write to the Free Software Foundation,
phh@122 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
phh@122 18 *
phh@122 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
phh@122 20 * CA 95054 USA or visit www.sun.com if you need additional information or
phh@122 21 * have any questions.
phh@122 22 *
phh@122 23 */
phh@122 24
phh@122 25 private:
phh@122 26
phh@122 27 void pd_initialize() {
phh@122 28 _anchor.clear();
phh@122 29 _base_of_stack_pointer = NULL;
phh@122 30 }
phh@122 31
phh@122 32 frame pd_last_frame() {
phh@122 33 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
phh@122 34 assert(_anchor.walkable(), "thread has not dumped its register windows yet");
phh@122 35
phh@122 36 assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");
phh@122 37 return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());
phh@122 38 }
phh@122 39
phh@122 40 // Sometimes the trap handler needs to record both PC and NPC.
phh@122 41 // This is a SPARC-specific companion to Thread::set_saved_exception_pc.
phh@122 42 address _saved_exception_npc;
phh@122 43
phh@122 44 // In polling_page_safepoint_handler_blob(s) we have to tail call other
phh@122 45 // blobs without blowing any registers. A tail call requires some
phh@122 46 // register to jump with and we can't blow any registers, so it must
phh@122 47 // be restored in the delay slot. 'restore' cannot be used as it
phh@122 48 // will chop the heads off of 64-bit %o registers in the 32-bit
phh@122 49 // build. Instead we reload the registers using G2_thread and this
phh@122 50 // location. Must be 64bits in the 32-bit LION build.
phh@122 51 jdouble _o_reg_temps[6];
phh@122 52
phh@122 53 // a stack pointer older than any java frame stack pointer. It is
phh@122 54 // used to validate stack pointers in frame::next_younger_sp (it
phh@122 55 // provides the upper bound in the range check). This is necessary
phh@122 56 // on Solaris/SPARC since the ucontext passed to a signal handler is
phh@122 57 // sometimes corrupt and we need a way to check the extracted sp.
phh@122 58 intptr_t* _base_of_stack_pointer;
phh@122 59
phh@122 60 public:
phh@122 61
phh@122 62 static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }
phh@122 63
phh@122 64 #ifndef _LP64
phh@122 65 address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }
phh@122 66 #endif
phh@122 67
phh@122 68 static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); }
phh@122 69
phh@122 70 address saved_exception_npc() { return _saved_exception_npc; }
phh@122 71 void set_saved_exception_npc(address a) { _saved_exception_npc = a; }
phh@122 72
phh@122 73
phh@122 74 public:
phh@122 75
phh@122 76 intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }
phh@122 77
phh@122 78 void set_base_of_stack_pointer(intptr_t* base_sp) {
phh@122 79 _base_of_stack_pointer = base_sp;
phh@122 80 }
phh@122 81
phh@122 82 void record_base_of_stack_pointer() {
phh@122 83 intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));
phh@122 84 intptr_t *ysp;
phh@122 85 while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {
phh@122 86 sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);
phh@122 87 }
phh@122 88 _base_of_stack_pointer = sp;
phh@122 89 }
phh@122 90
phh@122 91 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
phh@122 92 bool isInJava);
phh@122 93
phh@122 94 // These routines are only used on cpu architectures that
phh@122 95 // have separate register stacks (Itanium).
phh@122 96 static bool register_stack_overflow() { return false; }
phh@122 97 static void enable_register_stack_guard() {}
phh@122 98 static void disable_register_stack_guard() {}