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src/os_cpu/linux_zero/vm/os_linux_zero.hpp@126ea7725993 (annotated)

src/os_cpu/linux_zero/vm/os_linux_zero.hpp

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

never@1445	1	/*
trims@1907	2	* Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
twisti@1701	3	* Copyright 2007, 2008, 2010 Red Hat, Inc.
never@1445	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445	5	*
never@1445	6	* This code is free software; you can redistribute it and/or modify it
never@1445	7	* under the terms of the GNU General Public License version 2 only, as
never@1445	8	* published by the Free Software Foundation.
never@1445	9	*
never@1445	10	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1445	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1445	13	* version 2 for more details (a copy is included in the LICENSE file that
never@1445	14	* accompanied this code).
never@1445	15	*
never@1445	16	* You should have received a copy of the GNU General Public License version
never@1445	17	* 2 along with this work; if not, write to the Free Software Foundation,
never@1445	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445	19	*
trims@1907	20	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	21	* or visit www.oracle.com if you need additional information or have any
trims@1907	22	* questions.
never@1445	23	*
never@1445	24	*/
never@1445	25
never@1445	26	static void setup_fpu() {}
never@1445	27
never@1445	28	static bool is_allocatable(size_t bytes);
never@1445	29
never@1445	30	// Used to register dynamic code cache area with the OS
never@1445	31	// Note: Currently only used in 64 bit Windows implementations
never@1445	32	static bool register_code_area(char *low, char *high) { return true; }
never@1445	33
never@1445	34	// Atomically copy 64 bits of data
never@1445	35	static void atomic_copy64(volatile void *src, volatile void *dst) {
never@1445	36	#if defined(PPC) && !defined(_LP64)
never@1445	37	double tmp;
never@1445	38	asm volatile ("lfd %0, 0(%1)\n"
never@1445	39	"stfd %0, 0(%2)\n"
never@1445	40	: "=f"(tmp)
never@1445	41	: "b"(src), "b"(dst));
twisti@1701	42	#elif defined(S390) && !defined(_LP64)
twisti@1701	43	double tmp;
twisti@1701	44	asm volatile ("ld %0, 0(%1)\n"
twisti@1701	45	"std %0, 0(%2)\n"
twisti@1701	46	: "=r"(tmp)
twisti@1701	47	: "a"(src), "a"(dst));
never@1445	48	#else
never@1445	49	*(jlong *) dst = *(jlong *) src;
twisti@1701	50	#endif
never@1445	51	}