/*
* Copyright (c) 1998, 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.
*
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#ifndef OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
#define OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
private:
void pd_initialize() {
_anchor.clear();
_base_of_stack_pointer = NULL;
}
frame pd_last_frame() {
assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
assert(_anchor.walkable(), "thread has not dumped its register windows yet");
assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");
return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());
}
// Sometimes the trap handler needs to record both PC and NPC.
// This is a SPARC-specific companion to Thread::set_saved_exception_pc.
address _saved_exception_npc;
// In polling_page_safepoint_handler_blob(s) we have to tail call other
// blobs without blowing any registers. A tail call requires some
// register to jump with and we can't blow any registers, so it must
// be restored in the delay slot. 'restore' cannot be used as it
// will chop the heads off of 64-bit %o registers in the 32-bit
// build. Instead we reload the registers using G2_thread and this
// location. Must be 64bits in the 32-bit LION build.
jdouble _o_reg_temps[6];
// a stack pointer older than any java frame stack pointer. It is
// used to validate stack pointers in frame::next_younger_sp (it
// provides the upper bound in the range check). This is necessary
// on Solaris/SPARC since the ucontext passed to a signal handler is
// sometimes corrupt and we need a way to check the extracted sp.
intptr_t* _base_of_stack_pointer;
public:
static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }
#ifndef _LP64
address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }
#endif
static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); }
address saved_exception_npc() { return _saved_exception_npc; }
void set_saved_exception_npc(address a) { _saved_exception_npc = a; }
public:
intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }
void set_base_of_stack_pointer(intptr_t* base_sp) {
_base_of_stack_pointer = base_sp;
}
void record_base_of_stack_pointer() {
intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));
intptr_t *ysp;
while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {
sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);
}
_base_of_stack_pointer = sp;
}
bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
bool isInJava);
// These routines are only used on cpu architectures that
// have separate register stacks (Itanium).
static bool register_stack_overflow() { return false; }
static void enable_register_stack_guard() {}
static void disable_register_stack_guard() {}
#endif // OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP