stubRoutines_sparc.hpp revision 0:a61af66fc99e 
1/*
2 * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25// This file holds the platform specific parts of the StubRoutines
26// definition. See stubRoutines.hpp for a description on how to
27// extend it.
28
29
30// So unfortunately c2 will call with a pc from a frame object
31// (already adjusted) and a raw pc (unadjusted), so we need to check both.
32// It didn't use to be like this before adapter removal.
33static bool returns_to_call_stub(address return_pc)   {
34  return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||
35          (return_pc == _call_stub_return_address );
36}
37
38enum /* platform_dependent_constants */ {
39  // %%%%%%%% May be able to shrink this a lot
40  code_size1 = 20000,                                        // simply increase if too small (assembler will crash if too small)
41  code_size2 = 20000                                         // simply increase if too small (assembler will crash if too small)
42};
43
44class Sparc {
45 friend class StubGenerator;
46
47 public:
48  enum { nof_instance_allocators = 10 };
49
50  // allocator lock values
51  enum {
52    unlocked = 0,
53    locked   = 1
54  };
55
56  enum {
57    v8_oop_lock_ignore_bits = 2,
58    v8_oop_lock_bits = 4,
59    nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits),
60    v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits),
61    v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits
62  };
63
64  static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];
65
66 private:
67  static address _test_stop_entry;
68  static address _stop_subroutine_entry;
69  static address _flush_callers_register_windows_entry;
70
71  static int _atomic_memory_operation_lock;
72
73  static address _partial_subtype_check;
74
75 public:
76  // %%% global lock for everyone who needs to use atomic_compare_and_exchange
77  // %%% or atomic_increment -- should probably use more locks for more
78  // %%% scalability-- for instance one for each eden space or group of
79
80  // address of the lock for atomic_compare_and_exchange
81  static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }
82
83  // accessor and mutator for _atomic_memory_operation_lock
84  static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; }
85  static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; }
86
87  // test assembler stop routine by setting registers
88  static void (*test_stop_entry()) ()                     { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
89
90  // a subroutine for debugging assembler code
91  static address stop_subroutine_entry_address()          { return (address)&_stop_subroutine_entry; }
92
93  // flushes (all but current) register window
94  static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }
95
96  static address partial_subtype_check()                  { return _partial_subtype_check; }
97};
98