• file
• revisions
• annotate
• diff
• comparison
• raw

src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp@126ea7725993 (annotated)

src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp

Tue, 03 Aug 2010 08:13:38 -0400

author

bobv

date

Tue, 03 Aug 2010 08:13:38 -0400

changeset 2036

126ea7725993

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

duke@435	1	/*
trims@1907	2	* Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	#include "incls/_precompiled.incl"
never@739	26	#include "incls/_assembler_windows_x86.cpp.incl"
duke@435	27
duke@435	28
duke@435	29	void MacroAssembler::int3() {
duke@435	30	emit_byte(0xCC);
duke@435	31	}
duke@435	32
never@739	33	#ifndef _LP64
duke@435	34	// The current scheme to accelerate access to the thread
duke@435	35	// pointer is to store the current thread in the os_exception_wrapper
duke@435	36	// and reference the current thread from stubs and compiled code
duke@435	37	// via the FS register. FS[0] contains a pointer to the structured
duke@435	38	// exception block which is actually a stack address. The first time
duke@435	39	// we call the os exception wrapper, we calculate and store the
duke@435	40	// offset from this exception block and use that offset here.
duke@435	41	//
duke@435	42	// The last mechanism we used was problematic in that the
duke@435	43	// the offset we had hard coded in the VM kept changing as Microsoft
duke@435	44	// evolved the OS.
duke@435	45	//
duke@435	46	// Warning: This mechanism assumes that we only attempt to get the
duke@435	47	// thread when we are nested below a call wrapper.
duke@435	48	//
duke@435	49	// movl reg, fs:[0] Get exeception pointer
duke@435	50	// movl reg, [reg + thread_ptr_offset] Load thread
duke@435	51	//
duke@435	52	void MacroAssembler::get_thread(Register thread) {
duke@435	53	// can't use ExternalAddress because it can't take NULL
duke@435	54	AddressLiteral null(0, relocInfo::none);
duke@435	55
duke@435	56	prefix(FS_segment);
duke@435	57	movptr(thread, null);
duke@435	58	assert(ThreadLocalStorage::get_thread_ptr_offset() != 0,
duke@435	59	"Thread Pointer Offset has not been initialized");
duke@435	60	movl(thread, Address(thread, ThreadLocalStorage::get_thread_ptr_offset()));
duke@435	61	}
never@739	62	#else
never@739	63	// call (Thread*)TlsGetValue(thread_index());
never@739	64	void MacroAssembler::get_thread(Register thread) {
never@739	65	if (thread != rax) {
never@739	66	push(rax);
never@739	67	}
never@739	68	push(rdi);
never@739	69	push(rsi);
never@739	70	push(rdx);
never@739	71	push(rcx);
never@739	72	push(r8);
never@739	73	push(r9);
never@739	74	push(r10);
never@739	75	// XXX
never@739	76	mov(r10, rsp);
never@739	77	andq(rsp, -16);
never@739	78	push(r10);
never@739	79	push(r11);
never@739	80
never@739	81	movl(c_rarg0, ThreadLocalStorage::thread_index());
never@739	82	call(RuntimeAddress((address)TlsGetValue));
never@739	83
never@739	84	pop(r11);
never@739	85	pop(rsp);
never@739	86	pop(r10);
never@739	87	pop(r9);
never@739	88	pop(r8);
never@739	89	pop(rcx);
never@739	90	pop(rdx);
never@739	91	pop(rsi);
never@739	92	pop(rdi);
never@739	93	if (thread != rax) {
never@739	94	mov(thread, rax);
never@739	95	pop(rax);
never@739	96	}
never@739	97	}
never@739	98	#endif